The history and development prospects of plastic molding machineryThe history and development prospects of plastic molding machinery
Compared with ordinary machinery, plastic molding machinery has many particularities and complexity.
(1) The status of plastic molding machinery in the entire plastic industry The plastic industry is a new industrial automatic molding machine, but also a very comprehensive industrial system. It is a whole consisting of resin, additives, plastic processing equipment, mold manufacturing, product processing and application, post-consumer plastic recycling, regeneration and utilization. In this whole, plastic molding machinery is an important part of the plastics industry and a necessary means to complete the production and molding of plastic products. Therefore, it can be said that the plastic molding machinery industry is one of the foundations for the development of the entire plastic industry. Generally, the design and manufacturing level of a country's plastic molding machinery can be used as one of the standards to measure the overall technical level of the country's plastic industry. The perfection and potential of plastic molding machinery have a very important role in improving the quality of plastic products, improving labor productivity, reducing product costs and energy consumption, strengthening safety production and environmental protection, and realizing new processes.
Plastic molding machinery manufacturing is also an emerging industry. With the rapid development of the world's plastic industry, the manufacture of plastic molding machinery has become an important industry in modern industry. Although it is still relatively young, its development prospects are very broad.
In recent years, with the rapid development of the plastic industry, the application fields of plastic products have continued to expand, plastic processing equipment has penetrated into various industries of the national economy, and has become an important part of China's machinery industry. An increasingly important role.
(2) History and development trend of plastic molding machinery
①History of plastic molding machinery Plastic molding machinery, like other artificial products in the world, was produced and developed in practice. To sum up, the sources of plastic molding machinery that are now widely used have the following three aspects.
A. It has been thousands of years to borrow the metal forming processing methods that people are familiar with, and many methods in plastic forming processing are borrowed from metal forming processing methods, such as pressing with a press, calendering and extruder Extruded products, etc.
B. It has been the transformation of human use of natural rubber for centuries. The kneading, pressing, vulcanization and extrusion of rubber have already developed into a mature molding process. Both plastic and rubber belong to polymer materials, and they also have many of the same characteristics. Therefore, the processing and molding of plastics developed in modern times, in fact, uses some molding methods similar to rubber processing. In modern plastic molding processing methods, there are many kinds of conversion from rubber molding methods. For example, from a rubber mixer to a plastic mixer; from rubber compression and vulcanization to plastic compression molding; from rubber extrusion and mixing, extrusion molding to plastic plastic mixing and extrusion molding of various plastics Products, etc.
C. Development As mentioned above, although plastic molding methods have two sources: borrowing from metal molding and converting from rubber molding, plastic also has its own characteristics. Compared with metal materials, plastics melt more easily when heated and have better plasticity than metals; compared with rubber, plastics have a higher melting temperature and better fluidity after melting. Therefore, these characteristics of the plastic automatic molding machine itself can be developed and continuously improved on the basis of borrowing and conversion, and finally become a variety of molding methods and corresponding molding machines unique to today's plastic processing.