Shrinkage rate of injection mold is always an important part in the development of injection mold. This ring has a tremendous impact on the size of the plastic. After the structure of the die is determined, all parts of the die can be designed in detail, that is, the size of the template and parts, the size of the cavity and core, etc. At this time, the main design parameters such as shrinkage of materials will be involved. Therefore, […]
In the process of injection moulding, the moisture content of material should be within a relatively low range to ensure the normal injection moulding and the normal physical properties of product materials. The water content of injection material is too high. First, there will be bad appearance of silver wire on the surface. Secondly, water vapor in the material will cause bubble holes in the product, which will affect the strength. Thirdly, if the moisture content is high, the […]
Plastic injection moulding is an efficient and mass production method, which can realize one-time moulding of plastic products with complex shapes. In the mould industry, in order to produce injection moulds with high precision, high quality and complex surface, we must use advanced computer aided design and manufacturing software to compile reasonable processing procedures, which is the necessary process to ensure the processing quality.
In addition to the above reasons, the reasons for the higher price of injection moulds are […]
Plastic moulds, which are matched with plastic moulding machines in plastic processing industry, give plastic products complete configuration and accurate size tools. According to the different forming methods, it can be divided into different types of moulds.
It is mainly a kind of mould which is widely used in the production of thermoplastic parts. The corresponding processing equipment of injection moulds is injection moulding machine. Plastics are heated and melted in the heating barrel of the bottom of […]
The process of injection molding mainly includes four stages: filling, holding, cooling and demolding. These four stages directly determine the quality of the product. It is a complete continuous process. Injection parameters
Injection pressure is provided by the hydraulic system of the injection system. There are many factors affecting the filling pressure of melt, which can be summarized into three categories: (1) material factors, such as the type and viscosity of plastics; (2) structural factors, such as the […]
Common automotive plastic parts are: dashboard body skeleton, battery bracket, front-end module, control box, seat support frame, spare placenta, fender, chassis cover, noise partition, rear door frame, etc. Most of the panels of automobile plastic parts are made of engineering plastic ABS or abs/pc.
Generally, doors, dashboards, bumpers and gearboards are all made of PP. Engine hood is made of lead with pp. PC / ABS is usually purchased from material manufacturers. Plastic parts are light in weight, and have […]
Plastic moulds can be divided into three categories, each of which has its advantages and disadvantages. Which of these three types of plastic moulds is more cost-effective?
(1) Large nozzle mould: Runner and gate are demoulded together with the product on the parting line. The design is the simplest, easy to process, and the cost is low. Therefore, more people use large nozzle system to operate.
(2) Fine nozzle mould: the runner and gate are not on the parting line, generally […]
(1) Mold meets working conditions
When the billet is plastic denatured in the cavity, it flows and slides along the surface of the cavity, resulting in severe friction between the surface of the cavity and the billet, which leads to the failure of the mold due to wear. So the wear resistance of materials is one of the most basic and important properties of dies.
Hardness is the main factor affecting wear resistance. Generally speaking, the higher the hardness of mold parts, […]
Plastic mould is for plastic processing and forming. They are made of 45 steel, P20, 718 and other plastic mould steels. The failure analysis of plastic mould can better guide the research and development of mould steel. The failure modes of plastic mould are as follows:
Abrasion and Corrosion of Cavity Surface
1) Plastic melt flows in the cavity with a certain pressure, and solidified plastic parts come out of the mould, which will cause friction and wear on the surface of the […]
There are many problems to be paid attention to in mould manufacturing. If you don’t know its process and key points, you should learn more about the following knowledge.
1) What is the most important and decisive factor in choosing die steel for mold manufacturing?
Forming method – can be selected from two basic material types.
A) Hot working tool steel, which can withstand relatively high temperatures during die casting, forging and extrusion.
B) Cold working tool steel, which is used for blanking and […]