In the severe business environment, some domestic plastic products are developed towards large high-added-value products and special two-color products. From the Chinese exhibition, injection service technology is often the highlight of the exhibition, and the double-color machine manufacturer has increased, and the injection service is also growing in China. So, do you know the classification of injection services?
Here is the content list:
Gas-assisted Injection molding
Sequential valve Injection molding
Laminate Injection molding
Insert Injection molding
Two-color Injection molding
The gas-assisted Injection molding is also called gas-assisted Injection molding, invented in the early 1980s, the promotion and in the 1990s is to inject a certain amount of inert gas while Injection molding molten plastic particles into the mold, and design and structural design and process control cause the Injection molding process of the specific area of the part. The formation of the hollow structure enhances the mechanical properties of the part while reducing the wall thickness of the parts, reducing the material cost and molding cycle. Therefore, the injection service process is not only applied in the automotive manufacturing industry but also has a growing development in the home appliance manufacturing industry, mainly to structural parts, especially structural parts with appearance. The research and application of water replacing an inert gas also achieved certain results.
In the 1990s, it is evolved from the Injection molding service with a hot runner mold, and is the opening and closing of different gates of the mold thermal track through the valve with the equipment, thereby controlling the Injection molding process of the stream. The process is suitable for thin-walled products, reducing the requirements of the device's locking force, optimizes surface quality, and shortens the molding cycle.
After the moving mold on the molded mold, the injection of the mold is placed after the mold shape, and the product is Injection molding so that the product has two layers of structures and the shape imparted by the mold. Its Injection molding is to reduces the processing process, the product has good quality, and the bonding force between parts is strong. Due to its shape sheets, it is necessary to be precisely controlled when cooperating with the mold, and the invisible planar sheet needs to reach the stretch requirements of the part. Therefore, the Injection molding process has little application in instrument panel manufacturing, and there is a certain application in the door, decorative panel/strip.
In the home appliance industry, the process is used in the manufacture of electrical switches in the production of instrument panels. The injection is a metal part that will need to be embedded in Injection molding parts in the mold, and the melted plastic is partially covered with a part after Injection molding.
On the two-color Injection molding machine, different colors/types of raw materials are simultaneously injected into specialized injection molds in the same production cycle, allowing the product to have a different appearance/performance to meet the corresponding requirements. However, due to bismuth Injection molding in equipment and huge investment in the mold, it gradually is replaced by secondary Injection molding. The secondary injection is simple to say that injection of parts is inserted, mainly applied to parts with higher mechanical properties and appearance requirements.
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