The molding of rubber and elastomeric compounds is done by forcing the
material into a shape by using heat and pressure. Rubber can be molded by
compression, transfer and injection methods. Injection or liquid injection
molding is a process of molding rubber parts.
In this process, a part of the configuration is cut into a series of metal
plates that are stacked to form the mold. A plate is added where the
injection nozzle introduces material into the sprue system and from there
into the cavity. To form the rubber component, the heated mold plates are
closed and the material is injected into the cavity through the nozzle of
the injection. This can be screw system, ram system or combinations of both.
The uncured rubber is then squeezed through the system whether hot or cold
into the cavity which forms the rubber component. The injection system is
set up in such a way to deliver amounts of material to the cavity, and the
sprue system is set up so that no excess material is lost.
Rubber injection molding lead to the formation of various rubber injection
parts which are used in diverse markets including:
- OEM industrial
- Hydronics industries etc.
Types of rubber used in injection parts
Uses of rubber injection parts
- Medical parts
- Industrial parts
- Vehicle parts
- Motorcycle parts
- Electronics parts
- Gasket rubber