Plastic extrusion molding is in plastic sheet extrusion machine after melting and plasticizing, again through the rotation of the screw, through the nose squeezed into a continuous sheet of material, so the extrusion is an important part in extrusion forming process.
Design sheet machine head, need to consider the question: 1, to avoid the nose has a dead corner area, inner chamber to streamline, make material can smooth uniform extrusion;
2, the shape of the head forming part to design reasonable, ensure material after the extrusion, the shape of a cross section with prescribed;
3, the nose under the condition of satisfy the intensity, its design is compact in structure, and barrel cohesion is tight, easy installation;
4, choose the nose of the material to high wear resistance, hardness;
5, head of the port to chrome plating, it can improve the abrasion resistance and corrosion resistance of the nose.
Design sheet machine head in addition to consider the above questions, you also need to combine products shape, heating method, extrusion speed, factors taken into account.