Injection Molding
A molding process that requires the use of an injection press and mold. Instead of the pot and piston arrangement of the transfer mold, the rubber is injected into the cavity through a sprue or gate by a reciprocating screw/ram that measures, premasticates, and preheats the rubber before injection.
Advantages of this process can be:
- More precise control of material mixing and flow resulting in better part quality and consistency
- Fewer cavities are used in this process compared to transfer molding resulting in less dimensional variation among parts produced from a given mold.
- Lower unit cost (for larger order quantities) due to faster curing and cycle times and higher production rates
- Less reject material (vs. the transfer process where some material is lost in the transfer pot)
- Is more cost effective when molding onto metal inserts.
- Molds may be less expensive since you are not making a separate ram and pot.
Injection molding machines capabilities:
66 tons and 96 gram shot size for molding LIM silicone, high consistency silicone and thermoplastic rubber elastomers.
We can process the following elastomers:
- Acrylic
- Aflas
- BUNA or Nitrile including hydrogenated Nitrile, HSN, or HNBR
- Butyl
- EPDM
- FKM
- Fluorosilicone
- Hypalon
- Natural rubber/polyisoprene
- Neoprene/chloroprene
- SBR
- Silicone
- Urethane
- Viton (trademark)
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