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Injection Molding Machine Solution

Injection Molding Machine

Injection molding machine also known as injection molding machine or injection machine. It is the thermoplastic or thermosetting plastics using plastic molding mold into plastic products of various shapes of the main molding equipment. Divided into vertical, horizontal, full electric. The injection molding machine heats the plastic, applying high pressure to the molten plastic so that it shoots out and fills the mold cavity.

The working principle

The working principle of the injection molding machine is similar to that of the syringe used for injection. It is the process of injecting the plastic into the closed mold cavity with the help of the thrust of the screw (or plunger), and obtaining the products after solidification and shaping.


Injection molding is a cycle process, each cycle mainly includes: quantitative feeding - melt plasticizing - pressure injection - mold filling cooling - mold opening parts. After taking out the plastic part, the mold is closed again for the next cycle.

Operation project of injection molding machine: operation project of injection molding machine includes control keyboard operation, electrical control system operation and hydraulic system operation. The selection of injection process action, feeding action, injection pressure, injection speed, ejection type, temperature monitoring of each section of the barrel, injection pressure and back pressure adjustment, etc.


The general screw injection molding machine molding process is: First adding granular or powdered plastic barrel, and with the rotation of the screw and barrel outer wall heating make plastic molten state, then the machine forward, clamping and injection nozzle with mold gate way, then access to the injection cylinder pressure oil, make the screw to move forward, thus at high pressure and fast speed will be within the closed mold injection melting temperature is low, After a certain time and pressure maintenance (also known as pressure), cooling, so that its solidified molding, can open the mold to take out the products (the purpose of pressure is to prevent the reflux of molten material in the mold cavity, to supplement the material in the mold cavity, and ensure that the products have a certain density and dimensional tolerance). The basic requirements of injection molding are plasticizing, injection and molding. Plasticizing is the premise to realize and guarantee the quality of molding products, and to meet the requirements of molding, injection must ensure enough pressure and speed. At the same time, due to the high injection pressure, the corresponding high pressure in the mold cavity (the average pressure in the mold cavity is generally between 20~45MPa), so there must be a large enough clamping force. It can be seen that injection device and mold device are the key parts of injection molding machine.


Vertical injection molding machine the characteristics

1. Injection devices and locking devices should be done at the same vertical center, with dies opened or closed up or down. Its floor area is only about half of the horizontal machine, therefore, translated into floor area productivity is about two times.

2. Easy to realize the molding of inserts. Insert placement is easy because the die face is up. Automatic insert forming can be easily realized by using the machine with fixed lower template and movable upper template.

3. The weight of the mold is supported by the horizontal template for up and down open and close action, will not happen similar to the horizontal machine due to the mold gravity caused by the forward fall, so that the template can not open and close the phenomenon. It is good for durability to maintain the precision of machinery and molds.

4. Through the simple manipulator to remove each plastic parts cavity, is conducive to precision molding.

Electrical control system

5. The general clamping device is open around, easy to configure all kinds of automatic devices, to adapt to the complex, exquisite products of automatic forming.

6. Pull belt conveying device is easy to achieve series through the middle of the mold installation, easy to achieve forming automatic production.

7. Easy to ensure the consistency of resin fluidity and mold temperature distribution in the mold.

8. Equipped with rotating table, moving table and tilt table and other forms, easy to realize the insert molding, mold combination molding.

9. Small batch trial production, the mold structure is simple and low cost, and easy to unload.

10. Has withstood the test of many earthquakes, vertical machine due to low center of gravity, relatively horizontal machine better earthquake resistance.

The injection molding machine has the ability to form plastic products with complex appearance, precise size or dense texture with metal inserts at a time. It is widely used in various fields such as national defense, electromechanical, automobile, transportation, building materials, packaging, agriculture, culture, education and health and People's Daily life. The rapid development of plastic industry, injection molding machine no matter in the number or variety of an important position, its total production accounted for the entire plastic molding equipment 20%- 30%, so as to become the fastest growth in plastic machinery, the production of the largest number of machines

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