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SMC/BMC/DMC Mould   

Basic characteristics SMC and BMC are thermoset, that means crosslinking materials where the crosslinking is irreversible. This is the base for the unique technical performance of these materials class and the mold.

The materials consist of the following components:

SMC/BMC/DMC Composite:Resin, Shrink compensation, Fillers, Reinforcement, Additives, Curing system; Moulding of SMC and BMC: Moulding is made in heated steel tools at temperatures between 125°C and 170°C.

Mold categories:

1. Compression Moulding

Layers of SMC or preformed pellets of BMC are placed into the heated mold. Through closing the tool the material fills the cavity and polymerizes. After complete cure the parts are released hot.

2. Transfer Moulding

Preformed SMC or BMC is placed in the injection valve of the heated mold and is injected into the cavity after closing the mould. The material fills the cavities of the mold . After complete cure the parts are released hot.

Transfer moulding is used for multi cavity tools of thick parts with high requirements for strength.

3. Injection Moulding

BMC or injection SMC are placed in the stuffer which feeds the injection unit. For these thermosets non return valves are used. The Composit is injected into the closed hot mold, fills the cavities and polymerizes. After complete cure the parts are released hot. Injection moulding is used for highest precision parts and complex geometries.

4. Injection Compression Moulding

BMC or injection SMC are placed in the stuffer which feeds the injection unit. For these thermosets non return valves are used. The Composit is injected into the semi closed hot mold fills the cavities and polymerizes. After complete cure the parts are released hot.

Injection compression preserves the fibres and improves the degassing of the cavities. The process is used for parts with high mechanical strengths.

 

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