Polyurethane panel injection type plank production

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by：Lisson 2020-10-23

The manufacturing method is in the mold in injection molding, this is a batch processing method. Foaming machine the metering pump in the polyurethane raw material into the mixing head of two component, after mixing, through the mould injection hole injection mold cavity the raw material. Mold cavity has been planted surface material in advance. Foam after curing, can be removed from the mold plate. This processing method has the advantage of simple equipment, to adapt to many kinds of production. According to the needs of the application to plane or concave and convex shape of the surface material for composite plate surface, can also be applied. This method should pay attention to adjusting the parameters of the foaming time when production plate, should choose different formula to the plate of different length, can meet the requirements of different specifications sheet molding process, for longer plate length, adjust the formula is very important. Sheet production, raw material after the injection mold of two component, must be completely filled cavity to gel, otherwise, it is difficult to make foam density uniformity of products, if the gel curing speed is too fast, is likely to cause excessive injection port close to where the filling density, and far away from the injection port filling, resulting in the cavity. At this time, the adjustment of polyether combination formula is particularly important.