What are the injection molding methods?


In fact, injection molding is also a processing procedu […]

In fact, injection molding is also a processing procedure, and many products have to go through this procedure, because it is mainly to further improve the quality of the tools and improve the safety level, so that customers can purchase and use with confidence. The injection molding procedures are also divided into many Kind of, we only briefly enumerate the following.

Compression injection molding: (compression molding) is an advanced form of traditional injection molding.
Advantages: can increase the flow ratio of injection molded parts; use smaller clamping force and injection pressure; reduce material internal stress; and improve processing productivity.
Injection-compression molding is suitable for various thermoplastic engineering plastic products, such as large curved parts, thin-walled parts, small parts, optical lenses, and parts with good impact resistance requirements.

1. Exhaust injection molding
Exhaust injection molding: The purpose of the "exhaust" program is to allow the volatile fission products produced during the polymerization and solidification process to leave. If these gases cannot be discharged from the cavity, it will cause incomplete products or bubbles in the sealing process.

2. Low pressure injection molding
The low-pressure injection molding process is a packaging process that uses very low injection pressure to inject hot melt materials into the mold and quickly solidify. The excellent sealing performance and excellent physical and chemical properties of hot-melt materials are used to achieve insulation, temperature resistance and impact resistance. It has the functions of damping, moisture-proof, water-proof, dust-proof and chemical corrosion resistance, and plays a good role in protecting electronic components.

3. Water-assisted injection molding
Water-assisted injection molding technology is an advanced injection molding process, in which a part of the melt is injected into the cavity, and high-pressure water is injected into the melt through the device to finally form the workpiece. Water assist has many advantages that gas assist cannot match. Research and application show that the water aid can produce a thinner and more uniform cavity wall, and the inner wall surface of the flow channel is very smooth. Especially for thick-walled workpieces, the cooling time of water-assisted and gas-assisted cooling can be greatly shortened.