Characteristics And Principles Of Plastic Extrusion Die

- Aug 18, 2017-

Plastic extrusion mold is widely used in pipe, bar, monofilament, sheet, film, wire and cable coating, profile processing.

Used to form a continuous production of plastic products, a class of mold, also known as extrusion forming head, and its corresponding production equipment is a plastic extruder, the principle is solid and plastic in the heating and extruder screw rotation pressure conditions Under the melt, plastic, through a specific shape of the die made of cross-section and die shape of the same continuous plastic products. Its manufacturing materials are mainly carbon structural steel, alloy tools, and some extrusion die in the need for wear parts will be embedded in the diamond and other wear-resistant materials. Extrusion process is usually only applicable to the production of thermoplastic products, its structure and injection molds and compression molds are significantly different.

The principle of plastic extrusion die

Foaming Extrusion: Thermoplastic elastomers tpv can be blended by chemical and mechanical methods. For chemical foaming, foaming agents such as heavy hydrochloric acid salts can be used. The achievable foam density has a specific gravity of 0.97 (typically unexpanded tpv) to 0.70. Lower density is affected by patents. The blowing agent is degraded at 180 ° C to 190 ° C because the basis of most of the tpv is carried out at 195 to 215 ° C. The same time as

Multi-layer extrusion: co-extrusion method is the two materials in an extrusion process into a component of the technology. The two extruders are connected in series to provide a bottom mold and cause the respective polymeric material to coextrudate along the corresponding channels to obtain extruded gum of both materials. Uniform materials, such as tpv and polypropylene, can be blended together. Multilayer extrusion is a good way to mix hard and soft materials. Typically, the high hardness section section, such as the thermoplastic elastomer tpv, is generally used as a support structure for the component while the low hardness material provides flexibility. This is common in sealing applications because the sealing area is softer and the soft material can be crushed to achieve a good sealing effect. In the process of balancing the flow field, the use of higher hardness of the thermoplastic elastomer tpv as a rigid material to replace polypropylene is relatively simple. The same time as

Welded joints: Hot welding is a popular method for joining extruded gels made with tpv. The heat is introduced into the connection surface so that the surface is melted and the surfaces are joined together and a slight pressure is applied to ensure that no gas enters the contact surface. After cooling, the junction is almost the same as the strength of the part itself. Another way to join the extruded part is to use an adhesive system. The same time as

Plastic Plate Mold Features:

1, the die has a streamlined flow channel surface, two halves die design, die disintegration, clean up simple. The same time as

2, manual fine-tuning elastic die lip or removable upper lip design to suit the different thickness requirements of the extruded sheet. The same time as

3, the use of high-quality mold steel or imported alloy steel to extend the life of the mold. The same time as

4, the flow surface of all hard chrome plating, the average thickness of 25? M ~ 50? M, and mirror polishing. The same time as

5, die fasteners with 12.9 high strength bolts. The same time as

6, heating components using high-quality, durable stainless steel heating rods, heating ring.