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extrusion foam molding material and method for its manufacture; foamed synthetic wood product and method for its manufacture extrusion apparatus for a foamed synthetic wood molding material for extrusion molding foam
extrusion foam molding material and method for its manufacture; foamed synthetic wood product and method for its manufacture extrusion apparatus for a foamed synthetic wood molding material for extrusion molding foam
Disclosed is a molding material for extrusion foam molding from which woody molded foam of high quality can be obtained. From the molding material, woody molded foam of high quality with no defects is efficiently produced. Constituent materials comprising woodmeal and a thermoplastic resin as major components and containing 1-5 wt% alkane having a molecular weight of 300-1,000 g/mol are melt-kneaded until the components come into an evenly dispersed state, and the resultant mixture is molded into pellets having a given diameter to obtain a molding material. Subsequently, this molding material is extrusion-molded into a given shape together with a blowing agent by means of an extrusion molding device, thereby obtaining woody molded foam. The extrusion molding is preferably conducted in a manner such that the extrudate (25a) extruded from the extruder (12) is introduced into the molding chamber (31) of a molding die (30) while keeping the extrudate in the pressurized state and the extrudate (25a) is released from the pressure upon introduction into the molding chamber (31) of the molding die (30) to foam the extrudate (25a).
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机译：公开了一种用于挤出泡沫成型的成型材料，从该成型材料可以获得高质量的木质成型泡沫。利用该成型材料，可以有效地生产没有缺陷的高质量的木质成型泡沫。将包含木粉和热塑性树脂作为主要成分并含有1-5 wt％分子量为300-1,000 g / mol的烷烃的组成材料进行熔融捏合，直到这些成分达到均匀分散的状态，然后将所得混合物成型切成具有给定直径的粒料以获得模制材料。随后，通过挤出成型装置将该成型材料与发泡剂一起挤出成型为给定形状，从而获得木质成型泡沫。挤出成型优选以如下方式进行：将从挤出机（12）挤出的挤出物（25a）引入到成型模具（30）的成型室（31）中，同时将挤出物保持在加压状态并保持挤出物的状态。引入模制模具（30）的模制腔室（31）时，将压力（25a）释放，以使挤出物（25a）发泡。
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