Extrusion machines are widely used in the production of pipe, bar, profile, hollow products and single silk products. Together with the extruder, the plastic can be mixed, plasticized, dehydrated, granulated, and fed, and other preparatory processes or semi-finished products processing. So extrusion has become one of the most popular plastic forming methods.
Extrusion molding is a method of making material flow through the die through heating and pressurizing in the extruder.
The planning of extruding plastic head requires the planners to have a thorough understanding of the characteristics of plastic and rich experience in planning the extruding plastic head.
Single-screw extruder is the most widely used extruder, but in the planning process, the problems encountered in practice are messy, because the plastic varieties are not the same, their shear speed, surface viscosity is not the same, and the lubricant, filler because of different varieties and dosages, their liquidity is not the same.
Therefore, the structural planning of extruding plastic head is still based on practice and experience. This planning is the primary planning in extrusion plastic head of each component in the working face, appearance standard, method of overall structure, because the plastic material characteristics on the request of the extrusion plastic nose is very high, so the processing manufacturing technology of the primary parts of planning, also the nose and out of the host the join method of planning.
The development process of extruder since the first extruder came out, the extrusion technology has been excellent and rapid development. From the initial plunger type to the more advanced screw type, from the initial manual operation to the complete automatic control, from the single product to the product diversification, extrusion technology is gradually becoming sophisticated. Now, extrusion has high production efficiency, manufacturing convenience, can be continuous production and other characteristics, he, it occupies a very important position in the plastic molding industry.
Over the past half a century, China's plastics industry has experienced the development process from nothing to nothing, from small to large, especially in the past 20 years of reform and opening up, the rapid development of the ministry has initially formed a complete industrial system, from the output has been among the international ranks.
Plastic machinery work is to provide technical equipment for the plastic industry, weak market demand to promote the development of the plastic machinery industry. Extrusion technology has been developed very well.