Injection molding is a commonly used plastic processing method that can produce various plastic products through steps such as raw material processing, melt injection, injection molding, cooling and solidification, mold opening and closing, and product removal and post-processing. Injection molding has the advantages of high production efficiency and high product accuracy, and is widely used in daily life and industrial fields.
Inject molten plastic into the mold. During the injection process, molten plastic needs to be injected into the mold at a certain speed and pressure through an injection machine. This requires precise control of the operating parameters of the injection machine, such as injection time, injection speed, injection pressure, etc. After the injection is completed, it is necessary to maintain a certain injection pressure to ensure that the plastic is fully filled and does not produce bubbles or defects.
How to solve the material flow problem during the injection molding process in Dalian?
Material selection: Reasonable selection of plastic materials, considering factors such as fluidity and melt index. Generally speaking, high fluidity materials are suitable for injection molding and can increase material fluidity.
Mold design: The design of a mold has a significant impact on material flow. Reasonable mold structure and channel design can improve the fluidity and filling performance of materials. For example, increasing injection points, reasonably setting discharge ports, reducing hopper height differences, etc.
Runner system design: The runner system in injection molds has a significant impact on material flow. First, ensure that the width and height of the flow channel are appropriate to ensure sufficient flow space. Secondly, the flow channel should adopt an arc shape as much as possible to avoid right angles and sharp corners, while reducing changes in cross-section.
Temperature control: Reasonably control the heating temperature of the injection molding machine to ensure uniform melting and fluidity of the melt. Generally speaking, high temperatures can increase the fluidity of materials, but it is also important to note that excessively high temperatures can increase the melting degree of materials, leading to problems such as deformation and shrinkage.
The process of injection molding generally includes six steps: raw material processing, melt injection, injection molding, cooling and solidification, mold opening and closing, product removal and post-processing. These steps will be explained in detail below. Firstly, raw material processing. The raw materials for injection molding are generally granular plastic particles that need to be dried to ensure that they are not affected by moisture during the injection process. Then, the plastic particles are placed in the hopper of the injection molding machine and heated to melt into a molten state of plastic.
Injection molding is widely used in various industries. In the daily necessities industry, injection molding can be used to produce various plastic products, such as plastic cups, plastic bowls, plastic trays, etc. In the field of electronic and electrical appliances, injection molding can be used to produce plastic shells, plastic accessories, and so on. In the automotive industry, injection molding can be used to manufacture automotive interiors, headlight housings, etc. In the field of medical devices, injection molding can be used to produce medical syringes, infusion sets, etc.
