Plastic Injection Service
Injection molding is one molding method that combines injection and molding. The advantages of injection molding method are fast production speed, high efficiency, operation can be automated, variety of designs and colors, shapes can be from simple to complex, sizes can be from large to small, and the product size is accurate, the product is easy to update, and it can be made into complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes, high quantity and shorter delivery. Custom plastic injection for you.
Plastic Material
Depending on the specific industry, we offer a variety of plastic materials tailored to your needs. Based on the characteristics of each material, we will provide professional recommendations to help you make the best choice.
Injection Molding
Injection molding materials can include metals, glasses, elastomers, and even confections, but the process is most commonly applied to thermoplastics and thermosetting polymers due to their excellent moldability and wide range of industrial applications.
| Application | Surface Treatment | Advantages |
|---|---|---|
| Automotive parts | Texture | Suitable for mass production |
| Medical devices | Polishing | Highly efficient manufacturing process |
| Lighting components | Painting | Multiple plastic material options (PTFE, POM, ABS, PP, etc.) |
| Wire spools | Silk printing | Capable of producing complex and intricate parts |
| Packaging products | Plating | Cost-effective solution |
| Bottle tops | | Material saving |
| Toys | | High part reliability and consistency |
| Musical instruments | | |
| Storage containers | | |
| Mechanical parts | | |
Plastic Injection Process
Clamping
Before material injection begins, the two halves of the mold must be securely closed by the clamping unit. Each half is mounted onto the injection molding machine, with one half fixed and the other sliding into place. The hydraulic clamping unit applies enough force to keep the mold firmly shut during the injection process. The time required for this step depends on the machine size—larger machines with higher clamping force generally take longer. This duration can often be estimated based on the machine’s dry cycle time.
Injection
Plastic material, typically in the form of pellets, is fed into the injection molding machine and moved forward by the injection unit. As it advances, the material is melted by applied heat and pressure. Once molten, the plastic is injected rapidly into the closed mold. The pressure buildup helps pack the material tightly and hold its form. This amount of material is referred to as the “shot.” While the exact injection time varies due to the complex flow behavior of molten plastic, it can be estimated based on factors like shot volume, injection pressure, and machine capacity.
Cooling
Once inside the mold, the molten plastic begins to cool and solidify upon contact with the mold surfaces. As it cools, it conforms to the mold’s shape, forming the final part. However, shrinkage can occur during this phase. Proper packing pressure during injection helps minimize this shrinkage. The mold cannot be reopened until the cooling process is complete. Cooling time is typically determined by the material’s thermodynamic properties and the maximum wall thickness of the part.
Ejection
After sufficient cooling, the molded part is ejected using an ejection system connected to the rear half of the mold. When the mold opens, pins or plates push the part out. Since the part may adhere to the mold surface due to shrinkage, ejection often requires significant force. Mold release agents can be applied beforehand to assist with this process. Ejection time includes the time it takes to open the mold and allow the part to fall clear. This step is usually estimated based on the machine’s dry cycle time. Once ejected, the mold can be clamped again for the next cycle.
Shenzhen T-One Precision Machinery Co.,Ltd(Shenzhen Branch)
Address: S4-04-046, New Asia Plaza 2013 Fashion Plaza (Commercial City), No. 3999, Longgang Avenue (Henggang Section), Huale Community, Henggang Street, Longgang District, Shenzhen
Tel.: +86 755 2849 8865
Email: joycechen.chp@bie-machiningparts.com
Shenzhen T-One Precision Machinery Co.,Ltd(Dongguan Factory)
Address: 3rd Floor, Building 1, Urban Yunchuang Valley, No. 6 Keji Road, Fenggang Town, Dongguan City, Guangdong Province
Tel.: +86 769 8190 0639
