Mold is a tool to use its specific shape to shape products with certain shape and size.
In all kinds of material processing industry, a variety of molds are widely used. For example, sand mold or die-casting mold for metal casting, forging die and cold pressing die for metal pressure processing are used.
The overall requirement of the mould is that it can produce the public owned products which meet the requirements of the use in the aspects of dimensional accuracy, appearance and physical properties. From the perspective of mold use, it requires high efficiency, automation and easy operation; from the perspective of mold manufacturing, it requires reasonable structure, easy manufacturing and low cost.
Mold affects the quality of products. First of all, the shape, size, surface finish, parting surface, location of gate and exhaust slot and demoulding mode of mold cavity have a very important impact on the dimensional accuracy and shape accuracy of the part, as well as the physical properties, mechanical properties, electrical properties, internal stress, isotropy, external quality, surface finish, bubbles, dents, scorching, crazing, etc 。 Secondly, in the process of machining, the mold structure has a great influence on the difficulty of operation. In mass production of plastic products, mold opening should be reduced as much as possible
For this reason, the automatic opening and closing of the mold and the manual labor in the process of taking parts are often used. In the automatic production, the products can fall off automatically from the mold. In addition, the mold has an impact on the cost of products. When the batch size is not large, the cost of mold in the cost of parts will be a large proportion. At this time, we should try to use reasonable and simple mold structure to reduce the cost.
In modern production, reasonable processing technology, efficient equipment and advanced mold are essential, which are three important factors, especially the mold plays an important role in realizing the material processing technology requirements, the use requirements of plastic parts and the modeling design. High efficient automatic equipment can only play its role if it is equipped with automatic production mold. The production and update of products are based on the manufacturing and updating of molds. Due to the great demand for the variety and output of the products, higher and higher requirements are put forward for the mould. Therefore, promote the continuous development of the mold.