{"id":2723,"date":"2026-07-31T14:25:57","date_gmt":"2026-07-31T14:25:57","guid":{"rendered":"https:\/\/www.fhysilicone.com\/?p=2723"},"modified":"2026-07-31T14:28:11","modified_gmt":"2026-07-31T14:28:11","slug":"silicone-suction-cup-design-guide-holding-force-surface-compatibility-and-vacuum-leakage","status":"publish","type":"post","link":"https:\/\/www.fhysilicone.com\/es\/silicone-suction-cup-design-guide-holding-force-surface-compatibility-and-vacuum-leakage\/","title":{"rendered":"Gu\u00eda de dise\u00f1o de ventosas de silicona: fuerza de sujeci\u00f3n, compatibilidad con superficies y fugas de vac\u00edo"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Las ventosas de silicona se utilizan para levantar, colocar, sujetar o fijar temporalmente productos aprovechando la diferencia de presi\u00f3n entre el interior de la ventosa y la atm\u00f3sfera circundante.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Entre sus aplicaciones se incluyen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sistemas rob\u00f3ticos de recogida y colocaci\u00f3n<\/li>\n\n\n\n<li>Equipos para la industria alimentaria y de envasado<\/li>\n\n\n\n<li>Manipulaci\u00f3n del vidrio<\/li>\n\n\n\n<li>Montaje de componentes electr\u00f3nicos<\/li>\n\n\n\n<li>Equipo m\u00e9dico<\/li>\n\n\n\n<li>Manipulaci\u00f3n de piezas de pl\u00e1stico<\/li>\n\n\n\n<li>Transferencia de chapa met\u00e1lica<\/li>\n\n\n\n<li>Fabricaci\u00f3n de electrodom\u00e9sticos<\/li>\n\n\n\n<li>Soportes de succi\u00f3n para uso dom\u00e9stico<\/li>\n\n\n\n<li>Soportes de vac\u00edo a medida<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"547\" src=\"https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-1024x547.png\" alt=\"\" class=\"wp-image-2726\" srcset=\"https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-1024x547.png 1024w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-300x160.png 300w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-768x410.png 768w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-1536x821.png 1536w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-18x10.png 18w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1-600x321.png 600w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Silicone-Suction-Cups-Holding-Force-Surfaces-and-Leaks-1.png 1716w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Una ventosa que funciona bien sobre cristal de laboratorio limpio puede fallar sobre un panel met\u00e1lico engrasado, una carcasa de pl\u00e1stico texturizada o un cart\u00f3n poroso. Un rendimiento fiable depende de m\u00e1s factores que el di\u00e1metro de la ventosa o el nivel de vac\u00edo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Los ingenieros deben coordinarse:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Superficie efectiva de succi\u00f3n<\/li>\n\n\n\n<li>Presi\u00f3n de vac\u00edo disponible<\/li>\n\n\n\n<li>Factor de seguridad<\/li>\n\n\n\n<li>Aceleraci\u00f3n y direcci\u00f3n de la carga<\/li>\n\n\n\n<li>Superficie de la pieza de trabajo<\/li>\n\n\n\n<li>Flexibilidad de los labios<\/li>\n\n\n\n<li>Geometr\u00eda de la copa<\/li>\n\n\n\n<li>Dureza de la silicona<\/li>\n\n\n\n<li>Capacidad de caudal al vac\u00edo<\/li>\n\n\n\n<li>Tasa de fuga<\/li>\n\n\n\n<li>Temperatura de funcionamiento y condiciones ambientales<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00f3mo genera fuerza de sujeci\u00f3n una ventosa de vac\u00edo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando la ventosa entra en contacto con una superficie, se extrae el aire del espacio que queda encerrado en su interior. A continuaci\u00f3n, la presi\u00f3n atmosf\u00e9rica exterior empuja la ventosa contra la pieza de trabajo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La fuerza de sujeci\u00f3n te\u00f3rica es:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>F = \u0394p \u00d7 A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f3nde:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>F<\/strong> es la fuerza de retenci\u00f3n te\u00f3rica<\/li>\n\n\n\n<li><strong>\u0394p<\/strong> es la diferencia entre la presi\u00f3n ambiente y la presi\u00f3n en el interior del vaso<\/li>\n\n\n\n<li><strong>A<\/strong> es el \u00e1rea efectiva de succi\u00f3n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Schmalz utiliza la misma relaci\u00f3n y destaca que la fuerza de succi\u00f3n es proporcional a la diferencia de presi\u00f3n y al \u00e1rea efectiva. <a href=\"https:\/\/www.schmalz.com\/en-se\/support\/know-how\/vacuum-knowledge\/the-vacuum-system-and-its-components\/vacuum-suction-cups\" rel=\"nofollow noopener\" target=\"_blank\">Principios de funcionamiento de las ventosas de vac\u00edo de Schmalz<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">El \u00e1rea efectiva no siempre coincide con el di\u00e1metro exterior<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El di\u00e1metro exterior nominal de la copa puede ser mayor que su \u00e1rea de sellado real.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La superficie efectiva depende de:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Di\u00e1metro interior del labio de sellado<\/li>\n\n\n\n<li>Deformaci\u00f3n de los labios<\/li>\n\n\n\n<li>Curvatura de la pieza de trabajo<\/li>\n\n\n\n<li>Derrota en la Copa<\/li>\n\n\n\n<li>Nervaduras de refuerzo internas<\/li>\n\n\n\n<li>Nivel de vac\u00edo<\/li>\n\n\n\n<li>Irregularidades en la superficie<\/li>\n\n\n\n<li>Precarga aplicada<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Utiliza el \u00e1rea efectiva publicada por el proveedor, siempre que est\u00e9 disponible. En el caso de una copa fabricada a medida, determina el \u00e1rea efectiva mediante un an\u00e1lisis geom\u00e9trico y ensayos f\u00edsicos de fuerza de sujeci\u00f3n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ejemplo de c\u00e1lculo de la fuerza de sujeci\u00f3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Consideremos una copa con un di\u00e1metro efectivo de 50 mm que funciona con una diferencia de presi\u00f3n de 60 kPa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El \u00e1rea efectiva es aproximadamente:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A = \u03c0 \u00d7 D\u00b2 \u00f7 4<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A = 3,1416 \u00d7 0,05\u00b2 \u00f7 4 \u2248 0,00196 m\u00b2<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La fuerza de retenci\u00f3n est\u00e1tica te\u00f3rica es:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>F = 60 000 Pa \u00d7 0,00196 m\u00b2 \u2248 118 N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esto equivale aproximadamente a la fuerza gravitatoria que act\u00faa sobre 12 kg, pero no se trata de una carga de trabajo segura.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si se aplica un factor de seguridad de 2 antes de tener en cuenta otras p\u00e9rdidas, la fuerza de trabajo preliminar es aproximadamente:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>118 N \u00f7 2 = 59 N<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La aceleraci\u00f3n din\u00e1mica, las cargas laterales, las fugas superficiales, la distribuci\u00f3n de la carga y el desgaste de la copa pueden reducir a\u00fan m\u00e1s la carga admisible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por qu\u00e9 la fuerza de sujeci\u00f3n te\u00f3rica no es la carga de trabajo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La f\u00f3rmula te\u00f3rica parte de los siguientes supuestos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Un cierre herm\u00e9tico total<\/li>\n\n\n\n<li>Presi\u00f3n uniforme<\/li>\n\n\n\n<li>Un \u00e1rea efectiva estable<\/li>\n\n\n\n<li>Sin aceleraci\u00f3n<\/li>\n\n\n\n<li>Sin carga lateral<\/li>\n\n\n\n<li>Sin contaminaci\u00f3n superficial<\/li>\n\n\n\n<li>No hay fugas en las mangueras ni en los racores<\/li>\n\n\n\n<li>Sin deformaci\u00f3n de la copa<\/li>\n\n\n\n<li>Sin desgaste<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Los sistemas de producci\u00f3n reales rara vez cumplen todas estas condiciones.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Schmalz se\u00f1ala que las fuerzas de sujeci\u00f3n calculadas son te\u00f3ricas y recomienda verificar la aplicaci\u00f3n real, ya que la geometr\u00eda de la ventosa, el acabado de la superficie y la deformaci\u00f3n de la pieza de trabajo afectan al rendimiento. Asimismo, recomienda aplicar coeficientes de seguridad, con coeficientes m\u00e1s elevados para cargas oscilantes. <a href=\"https:\/\/www.schmalz.com\/en-us\/support\/know-how\/vacuum-knowledge\/the-vacuum-system-and-its-components\/vacuum-suction-cups\/design-of-the-suction-cup\/\" rel=\"nofollow noopener\" target=\"_blank\">Gu\u00eda de dise\u00f1o de ventosas Schmalz<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El factor de seguridad final debe determinarse teniendo en cuenta la evaluaci\u00f3n de riesgos de la m\u00e1quina, la normativa aplicable, la direcci\u00f3n de la carga y las consecuencias que podr\u00eda tener la ca\u00edda de una pieza.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Direcci\u00f3n de carga<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Levantamiento normal<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando la ventosa levanta una pieza de trabajo horizontal desde arriba, la carga act\u00faa aproximadamente en perpendicular a la superficie de sellado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La fuerza de succi\u00f3n contrarresta directamente la carga, aunque a\u00fan as\u00ed hay que tener en cuenta la aceleraci\u00f3n y los momentos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Carga lateral o de cizallamiento<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando la ventosa sujeta un panel vertical, la gravedad act\u00faa en paralelo a la superficie de la pieza de trabajo. En ese caso, el sistema se basa en la fricci\u00f3n entre la ventosa y la pieza de trabajo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La fuerza lateral disponible puede estimarse de la siguiente manera:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>F\u2097\u2090\u209c\u2091\u1d63\u2090\u2097 = \u03bc \u00d7 F\u2099\u2092\u1d63\u2098\u2090\u2097<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f3nde:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03bc<\/strong> \u00bfCu\u00e1l es el coeficiente de fricci\u00f3n?<\/li>\n\n\n\n<li><strong>F\u2099\u2092\u1d63\u2098\u2090\u2097<\/strong> \u00bfCu\u00e1l es la fuerza de succi\u00f3n normal?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">El coeficiente de fricci\u00f3n debe medirse utilizando la silicona y en las condiciones reales de la pieza de trabajo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Schmalz se\u00f1ala que no es posible asignar un coeficiente de fricci\u00f3n v\u00e1lido de forma universal, ya que la rugosidad, la humedad, el aceite, el material de la copa, la geometr\u00eda del labio y la dureza influyen en el resultado. <a href=\"https:\/\/www.schmalz.com\/en\/support\/know-how\/vacuum-knowledge\/the-vacuum-system-and-its-components\/system-design-calculation-example\/theoretical-holding-force-of-a-suction-cup\" rel=\"nofollow noopener\" target=\"_blank\">C\u00e1lculo de la fuerza de sujeci\u00f3n de Schmalz<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cargas inclinadas y giratorias<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Al inclinar o girar una pieza de trabajo se generan tanto una fuerza de cizallamiento como un momento de desprendimiento. La copa situada a un lado de la carga puede soportar una fuerza considerablemente mayor que las dem\u00e1s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Utiliza m\u00e1rgenes de seguridad m\u00e1s amplios y comprueba el perfil de movimiento completo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cargas din\u00e1micas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En el caso de un sistema en movimiento, la fuerza necesaria incluye la aceleraci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una estimaci\u00f3n simplificada de la carga es:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fuerza necesaria = Masa \u00d7 (Gravedad + Aceleraci\u00f3n)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El an\u00e1lisis deber\u00eda incluir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aceleraci\u00f3n vertical<\/li>\n\n\n\n<li>Aceleraci\u00f3n horizontal<\/li>\n\n\n\n<li>Parada de emergencia del robot<\/li>\n\n\n\n<li>Cambio de sentido<\/li>\n\n\n\n<li>Rotaci\u00f3n<\/li>\n\n\n\n<li>Vibraci\u00f3n de la pieza de trabajo<\/li>\n\n\n\n<li>Colisi\u00f3n o impacto<\/li>\n\n\n\n<li>Fuerzas de la manguera<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Un sistema que sujeta de forma segura una pieza fija puede soltarla durante una aceleraci\u00f3n r\u00e1pida.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Centro de gravedad y momentos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El centro de gravedad debe permanecer dentro de la zona de apoyo que forman las ventosas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si la carga est\u00e1 descentrada:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Es posible que una taza est\u00e9 demasiado llena.<\/li>\n\n\n\n<li>Es posible que se empiece a pelar un labio.<\/li>\n\n\n\n<li>La pieza de trabajo puede girar.<\/li>\n\n\n\n<li>Es posible que se pierda el vac\u00edo en uno de los bordes.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Aumente la distancia entre las ventosas, cambie su posici\u00f3n o utilice una placa de soporte m\u00e1s r\u00edgida cuando la pieza de trabajo genere un momento de vuelco elevado.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Varias ventosas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El uso de varias tazas puede aumentar la capacidad total y la estabilidad, pero es posible que la carga no se distribuya de forma equitativa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una distribuci\u00f3n desigual de la carga puede deberse a:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Deformaci\u00f3n de la pieza de trabajo<\/li>\n\n\n\n<li>Diferentes alturas de copa<\/li>\n\n\n\n<li>Montaje desequilibrado<\/li>\n\n\n\n<li>P\u00e9rdidas de presi\u00f3n en las mangueras<\/li>\n\n\n\n<li>Variaci\u00f3n de la superficie<\/li>\n\n\n\n<li>Desgaste de la copa<\/li>\n\n\n\n<li>Un centro de gravedad desplazado<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Los compensadores de nivel o los fuelles pueden ayudar a que las copas entren en contacto con la superficie de forma uniforme.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El an\u00e1lisis de seguridad tambi\u00e9n deber\u00eda tener en cuenta qu\u00e9 ocurre si una taza deja de estar herm\u00e9tica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Formas de las ventosas de silicona<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Ventosas planas<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Las copas planas ofrecen una buena estabilidad y un movimiento inherente limitado. Son adecuadas para superficies relativamente planas y lisas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Piab describe el dise\u00f1o de su ventosa plana de silicona como adecuado para objetos planos, con salientes internos que ayudan a evitar que los productos delgados se deformen y mejoran la fricci\u00f3n bajo cargas paralelas. <a href=\"https:\/\/www.piab.com\/suction-cups-and-soft-grippers\/round-suction-cups\/flat-suction-cups\/9909623\" rel=\"nofollow noopener\" target=\"_blank\">Ventosas planas de silicona de Piab<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ventosas de fuelle<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Las copas de fuelle se adaptan a las diferencias de altura, a las superficies curvas y a ciertas desalineaciones angulares.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pueden ofrecer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compensaci\u00f3n de nivel<\/li>\n\n\n\n<li>Un contacto m\u00e1s suave<\/li>\n\n\n\n<li>Movimiento de elevaci\u00f3n corto<\/li>\n\n\n\n<li>Mejor adaptaci\u00f3n a piezas irregulares<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Entre las posibles desventajas se encuentran:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Greater lateral movement<\/li>\n\n\n\n<li>Reduced positional accuracy<\/li>\n\n\n\n<li>Cup collapse at high vacuum<\/li>\n\n\n\n<li>More complex molding<\/li>\n\n\n\n<li>Increased fatigue at the folds<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Deep Suction Cups<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Deep cups can conform to curved or convex objects. The cup profile must match the expected workpiece curvature.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Oval Suction Cups<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Oval cups fit long, narrow workpieces where a round cup of equivalent area would exceed the available width.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Entre sus aplicaciones se incluyen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pipes<\/li>\n\n\n\n<li>Profiles<\/li>\n\n\n\n<li>Narrow packages<\/li>\n\n\n\n<li>Elongated electronic components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Oval cups require good anti-rotation support.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Multi-Lip Suction Cups<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Multiple sealing lips provide additional contact lines and may improve sealing on slightly irregular surfaces. However, trapped contamination and higher molding complexity must be considered.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sealing-Lip Design<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The lip is the most critical part of the suction cup.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Important variables include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lip thickness<\/li>\n\n\n\n<li>Lip angle<\/li>\n\n\n\n<li>Lip length<\/li>\n\n\n\n<li>Edge radius<\/li>\n\n\n\n<li>Root radius<\/li>\n\n\n\n<li>Inside diameter<\/li>\n\n\n\n<li>Di\u00e1metro exterior<\/li>\n\n\n\n<li>Acabado superficial<\/li>\n\n\n\n<li>Concentricity<\/li>\n\n\n\n<li>Dureza del material<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Thin Lips<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A thin lip can conform to small surface irregularities and create a seal at low preload.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Potential risks include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Folding<\/li>\n\n\n\n<li>Wrinkling<\/li>\n\n\n\n<li>Rapid wear<\/li>\n\n\n\n<li>Desgarro<\/li>\n\n\n\n<li>Sensitivity to flash<\/li>\n\n\n\n<li>Distortion during handling<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Thick Lips<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A thicker lip is more stable and wear-resistant but may require greater preload and may not conform to textured surfaces.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lip Edge<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The sealing edge should be smooth and continuous.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Evita:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mold parting lines on the sealing edge<\/li>\n\n\n\n<li>Flash<\/li>\n\n\n\n<li>Gate vestiges<\/li>\n\n\n\n<li>Sharp notches<\/li>\n\n\n\n<li>Contaminaci\u00f3n superficial<\/li>\n\n\n\n<li>Local thickness changes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A small defect at one location can create a continuous leakage path.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Internal Cleats and Support Ribs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Internal cleats can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Prevent thin workpieces from being drawn deeply into the cup<\/li>\n\n\n\n<li>Maintain effective vacuum volume<\/li>\n\n\n\n<li>Increase friction<\/li>\n\n\n\n<li>Limit cup collapse<\/li>\n\n\n\n<li>Support films and sheets<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The cleats should not mark the product or block airflow between different areas of the cup.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vacuum Port Design<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The vacuum port should evacuate the cup efficiently without pulling flexible material into the opening.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Consider:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Port diameter<\/li>\n\n\n\n<li>Port location<\/li>\n\n\n\n<li>Filter or mesh<\/li>\n\n\n\n<li>Internal flow channels<\/li>\n\n\n\n<li>Hose diameter<\/li>\n\n\n\n<li>Fitting restriction<\/li>\n\n\n\n<li>Risk of workpiece blockage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A port that is too small can increase evacuation time. A port that is too large may allow thin film to be drawn into the opening.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Flat, Smooth and Nonporous Surfaces<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Algunos ejemplos son:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vidrio<\/li>\n\n\n\n<li>Polished metal<\/li>\n\n\n\n<li>Coated sheet<\/li>\n\n\n\n<li>Smooth plastic<\/li>\n\n\n\n<li>Glazed ceramic<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These surfaces generally produce low leakage, but contamination can still reduce performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Inspect for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Petr\u00f3leo<\/li>\n\n\n\n<li>Polvo<\/li>\n\n\n\n<li>Water films<\/li>\n\n\n\n<li>Protective coatings<\/li>\n\n\n\n<li>Ara\u00f1azos<\/li>\n\n\n\n<li>Mold texture<\/li>\n\n\n\n<li>Surface curvature<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Rough or Textured Surfaces<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Textured plastic, cast metal and patterned products contain microscopic paths under the sealing lip.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Possible design responses include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Softer silicone<\/li>\n\n\n\n<li>Thinner lip<\/li>\n\n\n\n<li>Wider sealing zone<\/li>\n\n\n\n<li>Varios labios de sellado<\/li>\n\n\n\n<li>Higher vacuum flow<\/li>\n\n\n\n<li>Larger cup<\/li>\n\n\n\n<li>Lower handling acceleration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Increasing vacuum depth alone may not overcome a continuous leakage path.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Porous Surfaces<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cardboard, wood, fabric and foam may allow air to pass through the workpiece itself.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For porous materials, the vacuum source must remove air continuously at a sufficient flow rate. A cup may reach only a moderate vacuum level but still hold the part if flow capacity is adequate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-flow or area-gripping systems may be more suitable than a conventional sealed cup.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Schmalz notes that leakage compensation through high airflow enables some vacuum systems to handle porous workpieces. <a href=\"https:\/\/www.schmalz.com\/en-fr\/support\/know-how\/vacuum-knowledge\/basic-knowledge\/operating-principles-of-vacuum-generation\" rel=\"nofollow noopener\" target=\"_blank\">Schmalz vacuum-generation principles<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Oily or Wet Surfaces<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Oil and water can affect:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fricci\u00f3n<\/li>\n\n\n\n<li>Lip sealing<\/li>\n\n\n\n<li>Cup movement<\/li>\n\n\n\n<li>Contaminaci\u00f3n superficial<\/li>\n\n\n\n<li>Silicone compatibility<\/li>\n\n\n\n<li>Comportamiento de liberaci\u00f3n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A wet surface may seal effectively in the normal direction but provide very low lateral friction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Test both holding force and slip resistance under the worst expected contamination level.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Curved Surfaces<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The cup must contact the surface around its complete sealing perimeter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For convex parts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The lip needs enough flexibility to wrap around the curvature.<\/li>\n\n\n\n<li>The cup body must not bottom out before the lip seals.<\/li>\n\n\n\n<li>The fitting should remain clear of the workpiece.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For concave parts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cup edges may bridge across the surface.<\/li>\n\n\n\n<li>Effective area can change.<\/li>\n\n\n\n<li>Air can remain trapped in irregular regions.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Specify the minimum and maximum surface radius in the RFQ.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Flexible Films and Bags<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Thin film can be drawn into the cup, block the vacuum port or become permanently creased.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internal support cleats<\/li>\n\n\n\n<li>Controlled vacuum level<\/li>\n\n\n\n<li>Larger contact area<\/li>\n\n\n\n<li>Thin conformable lips<\/li>\n\n\n\n<li>Adequate airflow<\/li>\n\n\n\n<li>Gentle release pressure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Piab offers reinforced multi-bellows silicone cups intended for bags containing liquids, viscous products and frozen food, demonstrating how cup geometry and reinforcement must be matched to the workpiece. <a href=\"https:\/\/www.piab.com\/suction-cups-and-soft-grippers\/round-suction-cups\/multibellows-suction-cups\/0200239\" rel=\"nofollow noopener\" target=\"_blank\">Piab silicone multi-bellows cup<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hot and Cold Workpieces<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Silicone can be suitable for a broad temperature range, but the complete cup assembly must be evaluated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Temperature affects:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dureza de la silicona<\/li>\n\n\n\n<li>Lip recovery<\/li>\n\n\n\n<li>Fricci\u00f3n<\/li>\n\n\n\n<li>Vacuum hose<\/li>\n\n\n\n<li>Metal fitting<\/li>\n\n\n\n<li>Adhesive or insert bond<\/li>\n\n\n\n<li>Product surface<\/li>\n\n\n\n<li>Cycle life<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Do not apply the silicone compound\u2019s maximum temperature directly as the continuous working limit of the completed suction cup.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplicaciones en contacto con alimentos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Some silicone formulations can meet food-contact requirements, but silicone is not automatically food-grade.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Applicable food-contact regulation<\/li>\n\n\n\n<li>Pigment compliance<\/li>\n\n\n\n<li>Cure and post-cure process<\/li>\n\n\n\n<li>Cleaning method<\/li>\n\n\n\n<li>Extractables<\/li>\n\n\n\n<li>Trazabilidad<\/li>\n\n\n\n<li>Maximum temperature<\/li>\n\n\n\n<li>Contact time<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Piab lists selected transparent silicone cups as compliant with FDA 21 CFR 177.2600 and EU 1935\/2004. This is grade-specific and should not be generalized to every silicone material. <a href=\"https:\/\/www.piab.com\/en-us\/suction-cups-and-soft-grippers\/round-suction-cups\/flat-suction-cups\/0200507\" rel=\"nofollow noopener\" target=\"_blank\">Piab food-contact silicone suction cups<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Dureza de la silicona<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Silicona m\u00e1s suave<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Potential advantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Better surface conformity<\/li>\n\n\n\n<li>Lower contact preload<\/li>\n\n\n\n<li>Improved sealing on minor texture<\/li>\n\n\n\n<li>Gentle handling of fragile products<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Possible disadvantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Greater cup deformation<\/li>\n\n\n\n<li>Lower lateral stability<\/li>\n\n\n\n<li>Lip folding<\/li>\n\n\n\n<li>Faster wear<\/li>\n\n\n\n<li>More difficult dimensional inspection<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Silicona m\u00e1s dura<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Potential advantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Better shape retention<\/li>\n\n\n\n<li>Greater lateral stability<\/li>\n\n\n\n<li>Improved handling during assembly<\/li>\n\n\n\n<li>Reduced collapse<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Possible disadvantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher preload<\/li>\n\n\n\n<li>Reduced conformity<\/li>\n\n\n\n<li>Increased risk of leakage on rough surfaces<\/li>\n\n\n\n<li>Greater marking pressure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hardness must be selected together with lip thickness and cup geometry.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Chemical Compatibility<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Suction cups may contact:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oils<\/li>\n\n\n\n<li>Grease<\/li>\n\n\n\n<li>Productos de limpieza<\/li>\n\n\n\n<li>Food fats<\/li>\n\n\n\n<li>Detergents<\/li>\n\n\n\n<li>Coolants<\/li>\n\n\n\n<li>Release agents<\/li>\n\n\n\n<li>Solvents<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">ASTM D471 provides comparative methods for evaluating changes in rubber after liquid exposure, including changes in mass, volume, hardness and tensile properties. <a href=\"https:\/\/store.astm.org\/standards\/d471\" rel=\"nofollow noopener\" target=\"_blank\">ASTM D471-16a(2021)<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Test the production silicone and complete suction cup after exposure to the actual process fluid.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Understanding Vacuum Leakage<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Leakage is the airflow entering the vacuum system while the cup is attached.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can occur through:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The cup-to-workpiece sealing edge<\/li>\n\n\n\n<li>A porous workpiece<\/li>\n\n\n\n<li>Surface scratches<\/li>\n\n\n\n<li>Mold texture<\/li>\n\n\n\n<li>Cup cracks<\/li>\n\n\n\n<li>Fittings<\/li>\n\n\n\n<li>Hoses<\/li>\n\n\n\n<li>Valves<\/li>\n\n\n\n<li>Insert-to-silicone interfaces<\/li>\n\n\n\n<li>Molded flash or defects<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A stable vacuum requires the vacuum source to remove air at least as quickly as it enters.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vacuum Depth Versus Vacuum Flow<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vacuum depth and airflow are different parameters.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Vacuum depth<\/strong> determines the available pressure difference.<\/li>\n\n\n\n<li><strong>Vacuum flow<\/strong> determines how quickly the system evacuates and compensates for leakage.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For a smooth, sealed surface, a relatively low-flow source may maintain vacuum once the cup is evacuated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a porous or leaking surface, high flow may be more important than achieving deep vacuum.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vacuum-Decay Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vacuum-decay testing evaluates the sealing quality of the cup and workpiece interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A typical method includes:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Place the cup on the production-representative surface.<\/li>\n\n\n\n<li>Apply a defined preload.<\/li>\n\n\n\n<li>Evacuate to the target vacuum level.<\/li>\n\n\n\n<li>Isolate the vacuum source.<\/li>\n\n\n\n<li>Record pressure change over a defined time.<\/li>\n\n\n\n<li>Repeat at the expected temperature and surface conditions.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Specify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Initial vacuum<\/li>\n\n\n\n<li>Stabilization time<\/li>\n\n\n\n<li>Test duration<\/li>\n\n\n\n<li>Maximum pressure rise<\/li>\n\n\n\n<li>Workpiece material<\/li>\n\n\n\n<li>Acabado superficial<\/li>\n\n\n\n<li>Cup conditioning<\/li>\n\n\n\n<li>Temperatura de ensayo<\/li>\n\n\n\n<li>Precarga aplicada<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Leakage-Flow Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For continuously leaking surfaces, isolating the vacuum source may cause immediate release.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead, measure the airflow required to maintain a specified vacuum level.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This method is useful for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Porous cardboard<\/li>\n\n\n\n<li>Wood<\/li>\n\n\n\n<li>Textured plastic<\/li>\n\n\n\n<li>Fabric<\/li>\n\n\n\n<li>Foam<\/li>\n\n\n\n<li>Rough castings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The vacuum generator should provide sufficient flow with an appropriate safety margin.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pull-Off Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A pull-off test measures the force required to separate the cup from the surface in the normal direction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The test should define:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nivel de vac\u00edo<\/li>\n\n\n\n<li>Cup preload<\/li>\n\n\n\n<li>Dwell time<\/li>\n\n\n\n<li>Pulling speed<\/li>\n\n\n\n<li>Pull direction<\/li>\n\n\n\n<li>Superficie de la pieza de trabajo<\/li>\n\n\n\n<li>Temperatura<\/li>\n\n\n\n<li>Cup age<\/li>\n\n\n\n<li>Number of cycles<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Peak pull-off force may include elastic adhesion and peeling effects. Do not use the maximum laboratory value directly as the machine\u2019s safe working load.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lateral Slip Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For vertical or angled surfaces, test the force required to initiate sliding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Measure using:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Actual silicone formulation<\/li>\n\n\n\n<li>Actual surface finish<\/li>\n\n\n\n<li>Dry condition<\/li>\n\n\n\n<li>Wet condition<\/li>\n\n\n\n<li>Oily condition<\/li>\n\n\n\n<li>Minimum and maximum temperature<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The lowest repeatable value should be used in the design calculation with an appropriate safety factor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Dynamic Holding Test<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A production-representative test should reproduce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Robot acceleration<\/li>\n\n\n\n<li>Deceleration<\/li>\n\n\n\n<li>Rotaci\u00f3n<\/li>\n\n\n\n<li>Direction changes<\/li>\n\n\n\n<li>Expected cycle time<\/li>\n\n\n\n<li>Workpiece variation<\/li>\n\n\n\n<li>Hose movement<\/li>\n\n\n\n<li>Emergency-stop condition<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Monitor the minimum vacuum level during the motion rather than only at the pickup position.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Release Behavior<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Reliable pickup is only half of the process. The cup must release the workpiece predictably.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Release problems can result from:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Soft lip adhesion<\/li>\n\n\n\n<li>Residual vacuum<\/li>\n\n\n\n<li>Static electricity<\/li>\n\n\n\n<li>Oily surfaces<\/li>\n\n\n\n<li>Sticky products<\/li>\n\n\n\n<li>Slow valve response<\/li>\n\n\n\n<li>Insufficient blow-off flow<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Controlled positive-pressure blow-off can shorten release time, but excessive pressure may damage the lip or eject lightweight parts unpredictably.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fatigue and Wear<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Suction cups repeatedly flex during contact, evacuation and release.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common wear locations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sealing edge<\/li>\n\n\n\n<li>Lip root<\/li>\n\n\n\n<li>Bellows folds<\/li>\n\n\n\n<li>Insert interface<\/li>\n\n\n\n<li>Areas contacting sharp product edges<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A cycle-life test should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Normal operating vacuum<\/li>\n\n\n\n<li>Actual preload<\/li>\n\n\n\n<li>Workpiece texture<\/li>\n\n\n\n<li>Handling frequency<\/li>\n\n\n\n<li>Temperatura<\/li>\n\n\n\n<li>Proceso de limpieza<\/li>\n\n\n\n<li>Release pressure<\/li>\n\n\n\n<li>Periodic leak and force measurements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Replacement intervals should be based on performance change rather than visible failure alone.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fitting and Insert Design<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Custom silicone cups may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Metal threaded inserts<\/li>\n\n\n\n<li>Plastic snap-in fittings<\/li>\n\n\n\n<li>Hose barbs<\/li>\n\n\n\n<li>Filters<\/li>\n\n\n\n<li>Check valves<\/li>\n\n\n\n<li>Reinforcement rings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The insert must withstand:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Axial pull<\/li>\n\n\n\n<li>Torque<\/li>\n\n\n\n<li>Vacuum cycling<\/li>\n\n\n\n<li>Cambios de temperatura<\/li>\n\n\n\n<li>Limpieza<\/li>\n\n\n\n<li>Hose loads<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Possible attachment methods include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mechanical locking<\/li>\n\n\n\n<li>Overmolding<\/li>\n\n\n\n<li>Uni\u00f3n adhesiva<\/li>\n\n\n\n<li>Retaining rings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Mechanical undercuts are generally more reliable than depending only on surface adhesion.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Manufacturing Considerations<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Custom silicone suction cups may be produced by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Liquid silicone rubber injection molding<\/li>\n\n\n\n<li>Moldeo por compresi\u00f3n<\/li>\n\n\n\n<li>Transfer molding<\/li>\n\n\n\n<li>Silicone-to-metal overmolding<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Critical tooling features include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sealing-lip thickness<\/li>\n\n\n\n<li>Lip concentricity<\/li>\n\n\n\n<li>Parting-line position<\/li>\n\n\n\n<li>Port geometry<\/li>\n\n\n\n<li>Bellows wall thickness<\/li>\n\n\n\n<li>Insert location<\/li>\n\n\n\n<li>Gate position<\/li>\n\n\n\n<li>Desahogo<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Control de flash<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Flash at the sealing edge can create leakage or inconsistent holding force.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Specify flash limits for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Outer lip<\/li>\n\n\n\n<li>Inner sealing edge<\/li>\n\n\n\n<li>Vacuum port<\/li>\n\n\n\n<li>Bellows folds<\/li>\n\n\n\n<li>Insert interface<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The most critical sealing edge should not require uncontrolled manual trimming.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Inspecci\u00f3n dimensional<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Possible inspection methods include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Optical measurement<\/li>\n\n\n\n<li>Vision inspection<\/li>\n\n\n\n<li>Non-contact profile measurement<\/li>\n\n\n\n<li>Controlled plug gauges<\/li>\n\n\n\n<li>Wall-thickness measurement<\/li>\n\n\n\n<li>Vacuum-decay testing<\/li>\n\n\n\n<li>Pull-off-force sampling<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Soft silicone deforms during contact measurement, so inspection force and fixture design must be controlled.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Suction-Cup Failures<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Failure<\/th><th>Likely cause<\/th><th>Corrective direction<\/th><\/tr><tr><td>Cup will not seal<\/td><td>Surface texture, damaged lip or low preload<\/td><td>Use a more flexible lip and inspect the surface<\/td><\/tr><tr><td>Vacuum is reached slowly<\/td><td>Restricted port or excessive system volume<\/td><td>Review port, hose and generator flow<\/td><\/tr><tr><td>Vacuum cannot be maintained<\/td><td>Continuous leakage or porous workpiece<\/td><td>Increase flow or change gripping technology<\/td><\/tr><tr><td>Cup slides sideways<\/td><td>Low friction, oil or insufficient normal force<\/td><td>Test friction and revise cup layout<\/td><\/tr><tr><td>Workpiece drops during acceleration<\/td><td>Dynamic force exceeds working capacity<\/td><td>Increase effective area or reduce acceleration<\/td><\/tr><tr><td>Lip folds inward<\/td><td>Lip too soft, thin or overcompressed<\/td><td>Revise geometry and preload<\/td><\/tr><tr><td>Thin film blocks the port<\/td><td>Insufficient internal support<\/td><td>Add cleats or a filter screen<\/td><\/tr><tr><td>Workpiece is marked<\/td><td>Excessive preload, vacuum or local pressure<\/td><td>Use softer geometry and better support<\/td><\/tr><tr><td>Cup remains attached during release<\/td><td>Residual vacuum or material adhesion<\/td><td>Improve valve response and blow-off<\/td><\/tr><tr><td>Early lip cracking<\/td><td>Abrasive surface, sharp edge or fatigue<\/td><td>Improve material, geometry or replacement interval<\/td><\/tr><tr><td>Uneven multi-cup loading<\/td><td>Height variation or warped workpiece<\/td><td>Add level compensation and improve mounting<\/td><\/tr><tr><td>Insert pulls out<\/td><td>Weak bonding or insufficient mechanical lock<\/td><td>Add undercuts and validate pull\/torque strength<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Prototype Validation Plan<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Surface Review<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Collect production samples representing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Smoothest surface<\/li>\n\n\n\n<li>Roughest surface<\/li>\n\n\n\n<li>Minimum and maximum curvature<\/li>\n\n\n\n<li>Dry condition<\/li>\n\n\n\n<li>Wet or oily condition<\/li>\n\n\n\n<li>Maximum porosity<\/li>\n\n\n\n<li>Temperature extremes<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Geometry Prototypes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Compare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cup diameter<\/li>\n\n\n\n<li>Flat versus bellows designs<\/li>\n\n\n\n<li>Lip thickness<\/li>\n\n\n\n<li>Dureza de la silicona<\/li>\n\n\n\n<li>Internal cleats<\/li>\n\n\n\n<li>Port size<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Static Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Measure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nivel de vac\u00edo<\/li>\n\n\n\n<li>Evacuation time<\/li>\n\n\n\n<li>Tasa de fuga<\/li>\n\n\n\n<li>Normal pull-off force<\/li>\n\n\n\n<li>Lateral slip force<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. Dynamic Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Run the actual movement profile with the maximum workpiece mass and worst center-of-gravity position.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Environmental Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluate relevant:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperatura<\/li>\n\n\n\n<li>Chemicals<\/li>\n\n\n\n<li>Cleaning cycles<\/li>\n\n\n\n<li>UV exposure<\/li>\n\n\n\n<li>Food-contact cleaning<\/li>\n\n\n\n<li>Abrasive contamination<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">6. Cycle-Life Testing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Monitor holding force and leakage at defined intervals until the replacement criterion or failure limit is reached.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Pilot Production<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Check variation by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mold cavity<\/li>\n\n\n\n<li>Material lot<\/li>\n\n\n\n<li>Insert lot<\/li>\n\n\n\n<li>Superficie de la pieza de trabajo<\/li>\n\n\n\n<li>Test fixture<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">RFQ Checklist<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Provide the following information when requesting a custom silicone suction cup quotation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2D drawing and 3D model<\/li>\n\n\n\n<li>Workpiece material<\/li>\n\n\n\n<li>Surface finish and roughness<\/li>\n\n\n\n<li>Surface curvature<\/li>\n\n\n\n<li>Workpiece porosity<\/li>\n\n\n\n<li>Maximum weight<\/li>\n\n\n\n<li>Center-of-gravity location<\/li>\n\n\n\n<li>Load orientation<\/li>\n\n\n\n<li>Robot acceleration<\/li>\n\n\n\n<li>Number and spacing of cups<\/li>\n\n\n\n<li>Available vacuum level<\/li>\n\n\n\n<li>Vacuum-source flow<\/li>\n\n\n\n<li>Required evacuation time<\/li>\n\n\n\n<li>Maximum leakage rate<\/li>\n\n\n\n<li>Temperature range<\/li>\n\n\n\n<li>Oil, chemical or cleaning exposure<\/li>\n\n\n\n<li>Requisitos relativos al contacto con los alimentos<\/li>\n\n\n\n<li>Dureza de la silicona<\/li>\n\n\n\n<li>Fitting type and thread<\/li>\n\n\n\n<li>Required cycle life<\/li>\n\n\n\n<li>Permitted surface marks<\/li>\n\n\n\n<li>Annual production volume<\/li>\n\n\n\n<li>Inspection and traceability requirements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If the suction-cup dimensions have not been finalized, provide samples of the workpiece and the complete handling motion. This allows prototype geometries to be tested under realistic conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preguntas frecuentes<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">How is suction-cup holding force calculated?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Theoretical holding force equals the pressure difference multiplied by the effective suction area. A safety factor, acceleration, load direction, friction, leakage and cup deformation must then be considered.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is the outside diameter the effective suction diameter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not always. The effective area is normally determined by the inside sealing boundary and can change when the lip deforms.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why does the cup hold glass but not textured plastic?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Glass is usually smooth and nonporous. Textured plastic creates leakage paths under the sealing lip and may require a softer lip, higher flow or a different cup geometry.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Does a deeper vacuum always improve performance?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. A continuous leak may prevent deep vacuum, and some flexible cups can collapse or deform at excessive vacuum levels. Flow capacity may be more important on porous surfaces.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Are silicone suction cups suitable for oily surfaces?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">They may seal, but oil can greatly reduce lateral friction and may affect the silicone over time. Holding, slip and compatibility tests are required.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can silicone suction cups contact food?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Only when the specific silicone formulation, pigment, manufacturing process and finished component meet the applicable food-contact requirements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why does a suction cup fail during robot movement?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Acceleration, rotation or an offset center of gravity may create forces and moments higher than the static holding calculation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How should vacuum leakage be tested?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use vacuum-decay testing for sealed surfaces and leakage-flow testing for porous or continuously leaking surfaces. Define the vacuum level, preload, surface and test duration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusi\u00f3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Reliable silicone suction-cup design requires more than selecting a diameter and vacuum pressure. Effective area establishes the theoretical force, while surface condition, friction, acceleration, leakage and cup geometry determine the usable working load.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prototype testing on actual workpieces is essential, especially for textured, porous, curved, oily or flexible products. Send your workpiece samples, surface information, load, motion profile and available vacuum data for a custom suction-cup DFM and performance evaluation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Silicone suction cups are used to lift, position, hold or temporarily attach products using a pressure difference between the inside of the cup and the surrounding atmosphere. Applications include: A suction cup that works on clean laboratory glass may fail on an oily metal panel, textured plastic housing or porous carton. Reliable performance depends on [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2724,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[2556,2560,2565,2563,2568,2564,2562,2567,2566,2557,2561,2559,2558],"class_list":["post-2723","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-bellows-suction-cup","tag-custom-suction-cup","tag-food-grade-suction-cup","tag-holding-force","tag-lsr-suction-cup","tag-robot-gripper-cup","tag-silicone-suction-cup","tag-silicone-suction-cup-design","tag-suction-cup-molding","tag-surface-compatibility","tag-vacuum-gripping","tag-vacuum-leakage","tag-vacuum-suction-cup"],"_links":{"self":[{"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/posts\/2723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/comments?post=2723"}],"version-history":[{"count":2,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/posts\/2723\/revisions"}],"predecessor-version":[{"id":2728,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/posts\/2723\/revisions\/2728"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/media\/2724"}],"wp:attachment":[{"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/media?parent=2723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/categories?post=2723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fhysilicone.com\/es\/wp-json\/wp\/v2\/tags?post=2723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}