Plastic product design needs to improve the performance of plastics
Pvc Chain Link Fence,Pvc Coated Rhombus Chain Link Fence,Pvc Chain Link Shenzhou City Hongda Hardware Products Co.,Ltd , https://www.hdpvcwire.com
The production process of plastic products can be roughly divided into plastic product design, mold design and manufacturing, product molding and modification. The shape, size and precision of plastic products are determined according to the requirements of use. However, since plastics have special physical and mechanical properties, the design of products must give full play to the advantages of plastic properties under the premise of meeting the requirements of use. And avoid or compensate for its shortcomings.
On the other hand, plastic articles are molded by a mold, that is, the mold cavity must be manufactured in accordance with the structure, shape, size, and the like of the plastic article. However, from the perspective of molding and operation, in order to simplify the structure of the mold and make it easy to manufacture and use, the shape of the plastic product should be changed in accordance with the requirements of use. Therefore, the design of plastic products from conception, sketching to final design of design drawings is a meticulous and complicated process. Any negligence in any link will result in degradation or scrapping of the products. Therefore, the design of plastic products is not only the primary link in the production of plastic products, but also a key link.
The basic principles for designing plastic products are as follows:
1. Under the premise of ensuring the use performance (such as mechanical strength, electrical properties, chemical resistance, dimensional accuracy, heat resistance, etc.), the structure is simple, the wall thickness is uniform, and the use is convenient. In addition, the plastic product is also considered. The magnitude of the stress and whether it is easy to eliminate.
2. When designing products, we should consider the structure as reasonable as possible, easy to manufacture molds and molding, and the shape of the products is conducive to filling and exhausting.
3. The auxiliary work volume before and after molding is less, the injection process and technical requirements are low, the operation is simple, and the mechanical processing after molding is avoided as much as possible.
4. The design of the part should consider the complexity of the removal from the mold as small as possible, and consider the structural strength and processing technology of the molded part.
The above principles mainly determine the precision, wall thickness, size, slope of the plastic products, as well as the ribs, support surfaces, holes, threads and metal inserts provided on the parts.