Helmet SMC Mould

Helmet SMC Mould

We  are also specizlized in making BMC/SMC mould,have more than 5 years experience.
We have a smart and  professional team,which have abundant experience on mould analysis and mould  designing,more than 5  years of  experience in BMC/SMC mould design. Also using advanced software and high  precision tooling machine to make good shape and good quality compression mould  /SMC mould.
1) The mould is heated.
2) Piece of the selected plastic  is placed into the mould and warms up.
3) The hydraulic press  begins to move down when the plastic has reached the correct temperature.
4)  As the upper and lower mould meet, the plastic is compressed into the shape of  the 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 SMCand 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 andpolymerizes. 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 cavitiesand polymerizes. After complete cure the parts are released  hot.
Injection compression  preserves the fibres and improves the degassingof the cavities. The process is  used for parts with high mechanical strengths.