liquid silicone for injection molding is a thermoset material. material crosslinks(cures) by addition of heat to mold. the injection press barrel and nozzle are water cooled to reduce material crosslinking due to material shear heating. mold heating is typically 250F to 400F depending on part...
Vesta Inc. is a silicone fabricator. we injection mold liquid silicones and are experienced formulating additives to base silicones. www.vestainc.com or email to Charles Heide, ch@vestainc.com for further info.
rick koll, vesta
i have replaced epdm and nitrile rubber diaphragms in potable water contact pressure regulators with silicone. you may find it necc. to revise part design to allow for the difference in mechanical props between the silicone and the other elastomer.
parlene coating is often used to reduce surface friction, see www.paraleneinc.com for one supplier.
we offer a proprietary inorgance surface treatment that is effective for lower durometers, 40A and down, for production orders of some size, say 1000 part minimum
vesta inc., www.vestainc.com
