The cemented carbide die tools breaks the tubular die tools that is obtained by extrusion or injection and is still in a plasticized state. It is placed in the die tools cavity while it is hot, and compressed air is immediately passed through the center of the tubular parison, causing the die tools to expand and close tightly. After cooling and solidifying on the cavity wall, a hollow product can be obtained. The die tools used in this plastic product die toolsing method is called a hollow blow die tools. Hollow blow die tools are mainly used for forming thermosetting plastic hollow container products.
Cemented carbide die tools are air-pressure forming die tools, usually in the form of a single female or male die tools. The periphery of the pre-prepared plastic sheet is pressed tightly to the periphery of the die tools and heated to soften it, and then a vacuum is applied to the side close to the die tools, or compressed air is filled on the opposite side to make the plastic sheet close to the die tools. After cooling and shaping, a thermoformed product is obtained. The die tools used for forming this type of product is called the air pressure forming die tools.
Cemented carbide die tools
The manufacturing technology of cemented carbide die tools concentrates the essence of mechanical processing. It is not only a combination of electromechanical processing, but also inseparable from the operation of die tools fitter. Its characteristics are as follows:
(1) Process characteristics of die tools production After a set of die tools is made, hundreds of thousands of parts or products can be produced through it. However, the die tools itself can only be produced in a single piece, and the products of die tools companies are generally unique, and there is almost no repeated production. This is a significant difference between die tools companies and other companies.
(2) The characteristics of die tools manufacturing. Because die tools are produced in a single piece, the accuracy requirements are higher than the product accuracy requirements. Therefore, there are many unique features in manufacturing. ①die tools manufacturing requires relatively high technical level of workers. ②The production cycle of cemented carbide die tools is longer than that of general products, and the cost is higher. ③In the process of manufacturing die tools, there are many processing contents in the same process, so the production efficiency is low. ④During the processing of the die tools, the position and size of some working parts should be determined through experiments. ⑤After assembly, the die tools must be tested and adjusted. ⑥die tools production is a typical one-piece production. Therefore, the production process, management method, and die tools manufacturing process have unique adaptability and laws. ⑦Complex shape and high manufacturing quality requirements. ⑧The material has high hardness. ⑨die tools processing is developing towards mechanization, precision and automation.
Cemented carbide die tools are used to continuously extrude plastic profiles. They are commonly called extrusion die tools, also called extrusion heads. This is another broad category of plastic die tools with a wide range of uses. It is mainly used for the forming and processing of plastic rods, pipes, plates, sheets, films, wire and cable coatings, nets, monofilaments, composite profiles and special profiles. It is also used for bad die toolsing of hollow products. This type of die tools is called a parison die tools or a parison die.
Product parts have higher and higher requirements for the accuracy of cemented carbide die tools, and there are more and more die tools with high precision, long life and high efficiency. At present, the use of precision forming grinders, CNC high-precision surface grinders, precision CNC wire-cutting machine tools, high-precision continuous trajectory coordinate grinders, and three-coordinate measuring instruments is becoming more and more common, making die tools processing more high-tech.
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