DESMA injection equipment is designed for various elastomer-type materials, including Liquid Silicone Rubber.

The same FIFO injection unit used for highly viscous materials, such as HNBR, can inject liquid silicone (LSR) using a conversion kit. A kit exchanges the existing screw cylinder and injection plunger, adapting the LSR material to the machine’s material intake port. A 2-pass static mixer and some primary electrical connections to the DESMA are then added.

Liquid Silicone Rubber (LSR) is a material comprised of two components that, when mixed, are cross-linked or cured to a fully elastic product. The primary difference between liquid silicone rubber (LSR) and highly viscous materials like HNBR or HTV is the “flowable” or “liquid” nature of LSR. LSR contains lower molecular weight polymers and offers many physical properties. LSR does not produce toxic or aggressive components, making it suitable for medical and food applications.

LSR mix meter systems, such as Mahr and Graco, interface well with DESMA injection presses.

DESMA machines can also process other types of silicone, such as high-temperature vulcanized (HTV) silicone. HTV processing also requires a conversion kit, different from LSR, that includes a silicone stuffer device.

The ability to process various materials with the same injection unit allows our DESMA customers to pursue business in multiple markets and applications.

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