China Drying Network News With the continued rapid development of China's plastics industry, the global recognition of China's presses has greatly improved, and thus the world's presses industry has also significantly improved its position. At present, China's plastics machinery industry not only has a vast consumer market with broad prospects and huge space, but also forms an industrial system with complete categories, comparable scales, and relatively advanced levels, which can basically meet domestic demand and have considerable international competitiveness. Several industrial clusters and enterprises have industrial structures throughout the country.
However, the development of the industry is far from mature. Experts believe that the following two major issues need to be solved: First, the industrial structure is irrational. There are very few large-scale enterprises, and SMEs occupy more than half of the country. The statistical data of a survey data are as follows: Enterprises with fixed assets of 10 million yuan accounted for only 23%, township and township enterprises accounted for 34%, joint ventures accounted for 11%, and individual enterprises accounted for 4%. Whether it is technical strength, production equipment, or management level, it is a weak link for small businesses, and therefore can only produce medium and low products. As a result, the product structure is irrational. Low-level injection molding machines are flooding the market, and high-level, high-performance injection molding machines are in short supply.
Another big problem is the backwardness of R&D. The level of research and development is directly related to the number of products and the strength of the product's technical performance. China's plastics machinery started late and has been following foreign markets. It has formed a model for purchasing products, introducing or copying equipment, and then putting it into production. The main reason why companies do not attach importance to the development of new products and the serious lack of outstanding R&D personnel.
Therefore, some experts have called for: Development of requirements, China's plastics machinery industry companies must take the road of grouping; must develop high-tech, high-performance, high-quality products.
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Plastic mold casting systems can be divided into three categories according to different types of molds:
(1) Door mold, gate and gate parting line, mold and peeling, the most simple design, convenient processing, and low cost, so more and more people use the door system to operate.
(2) Nozzle mold: The gate and gate line are not divided into types. Usually, a set of nozzle parting line is designed directly in the product design. The design is more complicated and the processing is difficult. The fine nozzle system is often selected according to the product requirements.
(3) Hot runner mold, the mold is the same structure and fine nozzle, the biggest difference is that one or more heat flow, temperature and hot pumping nozzle, but not cold feeding and demoulding, the runner and gate are directly on the product, So the port does not need demoulding, also known as pouring system, this system can save raw materials, suitable for products with expensive raw materials, high demand, difficult mold design and processing, and high cost. The heat flow channel system, also known as the heat flow channel system, is mainly composed of a heat flow channel cover, a heat flow channel plate and a temperature control electrical box. There are two commonly used heat flow channel systems: single-point heat flow channels and multi-point heat flow channels. Using a single-point thermal gate, the molten plastic is injected directly into the cavity with a single thermal gate sleeve. Multi-point hot sprue is used to branch molten material into each hot sprue sleeve and then through the hot sprue plate into the mold cavity
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