Plastic extrusion molding machine knowledge
Plastic extrusion molding machine knowledge
At present, more than 80% of the world's plastic products by extrusion and injection molding, calendering, blow molding, plastic and other growing plastic processing and molding method at the same time of increasing plastic products production, are also constantly improve and expand the types of plastic products and its application. Increasingly mature and consummate plastic products processing methods come out of various kinds of new, functional plastic parts, and push the plastic processing industry to continuously improve energy saving, saving materials and efficient methods.
Although the plastic molding method can almost processing plastic products of various shapes, but for some products with special shape, with the existing method may not be the most cost-effective, such as pipe fittings of tee, four-way, and some special products, etc. Especially under the condition of the production batch is small, expensive mold fee will be made by a small amount of to share, so injection method in the production of such parts has some difficulties, let alone for long and thin, face size is large or the expansion joint parts, the mouth abdomen categories, can't even use and general plastic injection molding method for processing. Plastic extrusion molding is the result of this trend.
Through comparison with the conventional plastic forming process, it can be seen that the extrusion molding has the following advantages in the application of plastics processing molding:
1. The forming equipment structure is relatively simple, the equipment investment is low;
2. The processed materials do not produce phase change, and the molding process can usually be carried out at lower temperature, with less energy.
3. It is suitable for the products with large difference in the size of the cross section.
4. The control system is relatively simple, and the process control is very flexible. By controlling the extrusion stroke, the same mould can be used to get the products of different sizes.
5. It can make full use of the high productivity and low cost of extruded billet.
6. In the case of small batch production, the production cost can be reduced greatly and so on.
