Plastic injection molding process

Plastic injection molding process

1. Clamping process. The pressure oil in the mold clamping cylinder pushes the moving platen forward to close the mold. Among them, the mold is first closed at low pressure and high speed; when the moving platen is about to approach the fixed platen, it is switched to low pressure and closed at low speed (mold protection); when it is confirmed that there is no foreign matter in the mold, it is switched to high pressure (clamping force), and lock the mold.

2. The injection table and the material injection process. After the mold is locked with the clamping force, the nozzle and the mold fit together in the injection stage. After the injection solenoid valve is energized, the injection cylinder is filled with pressure oil, pushes the screw connected to the piston rod of the cylinder, and injects the molten material in the barrel into the locked cavity according to the graded pressure and speed.

3. Pressure-holding process. During the process of filling the mold cavity with the melt until it is filled, the screw is required to maintain a certain pressure on the melt to prevent the melt in the mold from flowing back; The required materials to avoid defects such as shrinkage holes in the products.

4. Cooling and pre-molding process. Once the gate is sealed, the pressure-holding process is cancelled, and the product is naturally cooled and shaped in the mold; at the same time, the pre-plastic oil motor is driven to rotate the screw, and the granular plastic from the hopper is transported forward for plasticization. After the plasticization of the raw material reaches a predetermined metering value, in order to prevent the melted plastic from overflowing the nozzle, the screw needs to be moved backward for a certain distance, that is, the saliva treatment is performed.

5. The ejection table is withdrawn, the mold is opened and the product is ejected. After the pre-plastic measurement is completed, in order to prevent the nozzle from contacting the cold mold for a long time to form a cold material, etc., it is usually necessary to withdraw the nozzle from the mold, that is, enter the injection table retreat condition. Whether the action is executed and the sequence of execution can be selected. Once the product is cooled and shaped, the mold is opened and the product is automatically ejected.

要查看或添加评论,请登录

Deeann Yu的更多文章

  • Product Reverse Design - Injection Mold

    Product Reverse Design - Injection Mold

    Customers will express the real samples of auto parts, daily necessities, etc. to open molds.

  • MOLD - hot runner

    MOLD - hot runner

    Runner refers to the flow channel from the end of the runner to the gate. The form and size of the runner are often…

  • Hot runner injection molds

    Hot runner injection molds

    Internally heated nozzle and externally heated manifold plate Since the heat can be directly supplied to the gate end…

  • Hot runner mold

    Hot runner mold

    Hot runner mold A hot runner mold refers to a mold whose runner material is always in a molten state during the molding…

  • Two-plate cold runner mold

    Two-plate cold runner mold

    The two-plate cold runner mold is by far considered the most basic and versatile mold form. Compared with the hot…

  • Plastic injection molds is important

    Plastic injection molds is important

    The injection molding mold has the following characteristics: 1. It is difficult to manufacture.

  • Injection mold is important

    Injection mold is important

    The mold is one of the core components of the injection molding process. The function of the mold is: to make the…

    1 条评论

社区洞察

其他会员也浏览了