Gas-assisted injection molding This advanced injection technology is to inject high-pressure nitrogen directly into the plasticized plastic in the mold cavity through a gas-assisted controller (segmented pressure control system), so that the inside of the plastic part expands and becomes hollow, but the surface of the product is still maintained. And the shape is intact.
1. Advantages of gas-assisted injection molding technology:
1. Save plastic raw materials, the saving rate can be as high as 50%.
2. Shorten product production cycle time.
3. Reduce the clamping pressure of the injection molding machine up to 60%.
4. Improve the working life of the injection molding machine.
5. Reduce the pressure in the cavity, reduce the loss of the mold and increase the working life of the mold.
6. For some plastic products, the mold can be made of aluminum metal materials.
7. Reduce the internal stress of the product.
8. Solve and eliminate the problem of sink marks on the product surface.
9. Simplify the cumbersome design of the product.
10. Reduce the power consumption of the injection molding machine.
11. Reduce the investment cost of injection molding machines and developing molds.
12. Reduce production costs.
2. Advantages of gas-assisted injection molding technology:
In recent years, gas-assisted injection molding technology has been applied to the production of many plastic parts, such as television or audio enclosures, automotive plastic products, furniture, cabinets and daily necessities, various types of plastic boxes and toys, and so on.
Compared with ordinary injection molding, gas-assisted injection molding technology has many unparalleled advantages. It can not only reduce the manufacturing cost of plastic products, but also improve some of its properties. Under the condition that the parts can meet the same use requirements, the use of gas-assisted injection molding can greatly save plastic materials, and the saving rate can be as high as 50%.
On the one hand, the reduction in the amount of plastic raw materials reduces the time of each link in the entire molding cycle; on the other hand, the shrinkage and deformation of the part has been greatly improved through the introduction of high-pressure gas inside the part, so the injection holding time, The injection holding pressure can be greatly reduced.
Gas-assisted injection molding reduces the working pressure of the injection system and the clamping system of the injection machine, which correspondingly reduces energy consumption in production and increases the service life of the injection molding machine and mold. At the same time, because the pressure of the mold is reduced, the material of the mold can be relatively cheap. The parts processed by gas-assisted technology have a hollow structure, which not only does not reduce the mechanical properties of the parts, but also improves them, which is also beneficial to the dimensional stability of the parts.
The process of gas-assisted injection is slightly more complicated than ordinary injection. The control of parts, molds and processes is basically analyzed by computer-aided simulation, while the requirements for the injection molding machine system are relatively simple. At present, more than 80% of the injection molding machines are in use. The injection molding machine can be equipped with gas-assisted injection molding system after simple modification.
There are no special requirements for raw materials. General thermoplastics and engineering plastics are suitable for gas-assisted injection molding. Due to the advantages of gas-assisted injection molding technology in many aspects, at the same time, it has a wide range of applications and does not require too much equipment and raw materials. Therefore, in the future development, the application of this technology in the injection molding industry will become more and more widely.
3. Application of gas-assisted injection molding technology:
Gas-assisted injection molding technology can be applied to various plastic products, such as televisions, refrigerators, air conditioners, or audio enclosures, automotive plastic products, furniture, bathrooms, kitchen utensils, household appliances and daily necessities, various types of plastic boxes , Baby products box toys and so on.
Basically all thermoplastics used for injection molding (reinforced or not), and general engineering plastics (such as PS, HIPS, PP, ABS...PES) are suitable for gas-assisted injection molding technology.
