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about KSM Machinery

Ningbo KSM Machinery Manufacturing Co.,Ltd. is a cooperate with Italy technologies specialized high-grade plastic in production of high-grade plastic molding machine. Our corporation is located in Ningbo Beilun Xing Ao Industrial Park. We have a number of R&D personnel and cooperate with a group of high-tech enterprise.
As a professional China automatic injection machine manufacturers and hydraulic molding machine factory, it mainly produces high precision injection molding machines with the clamping force range from 110T to 1850T. The products have high rigidity structure and equipped imported hydraulic & electrical elements, used screw with mixing head in order to have excellent plastifying performance and be suitable for various engineering plastic injection molding and the uers'special order are available.
Since its corperation established, has always paid attention to enterprise reputation,carrid out scientific, management with rational designs, rests with quality pre-sale, selling and after-sale services to win the vast number user's trust and approval.
We abide by the motto of "honest, keep on improving, lay stress on quality, never relax in effort". Sincerely welcome friends from all wask for guidance.
The company has a research and development center with strong development strength. At the same time, it cooperates with domestic universities and colleges to develop and research injection and plastic production equipment and injection molding machine. The company has advanced hose testing equipment and experimental equipment. In recent years, the R&D center has achieved many achievements in injection molding machine and plastic equipment, rubber vulcanization process and formulation development.
Sincerely invite customers at home and abroad to visit our factory, and look forward to your long-term corporation to create a beautiful tomorrow for you!

Why choose us

Our advantages

  • quality

    We have our own testing lab and advanced and complete inspection equipment, which can ensure the quality of the products produced by our equipment.

  • capacity

    Our annual production capacity is over 500 set injection molding machine.

  • service

    We focus on developing high-quality products for top-endmarkets. Our products are in linewith international standards, and are mainly exported to Europe, America,Japan and other destinations around the world.

  • shipment

    We are only 15 kilometers away from the Ningbo Port, it is very convenient and efficient to ship goods to any other countries.

Guarantee High Quality With Our Expertise


Our professional team can offer wireless full range service and customer-oriented service according to customers' individual requirements.
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Industry Knowledge Expansion

The Key Components of Plastic Injection Molding Machines
Plastic injection molding machines are complex systems that are used to produce a wide range of plastic products. Understanding their key components and working principle is essential for operating and maintaining these machines effectively. Here are the key components and the working principle of plastic injection molding machines:

1. Injection Unit: The injection unit is responsible for melting and injecting the plastic material into the mold. It consists of the hopper, barrel, and screw. The plastic resin is fed into the hopper, where it is conveyed into the barrel. Inside the barrel, the resin is heated and melted by the electric heating elements. The rotating screw applies pressure and conveys the molten plastic towards the mold.
2. Clamping Unit: The clamping unit holds the mold in place during the injection molding process. It consists of the mold clamp, which exerts the necessary force to keep the mold closed, and the moving platen, which supports the mold. The clamping unit operates hydraulically or mechanically to provide the required force to withstand the injection pressure.
3. Mold: The mold is a specially designed cavity that determines the shape and features of the plastic product being produced. It consists of two halves, the stationary side (cavity) and the movable side (core). The molten plastic material is injected into the mold cavity, where it solidifies and takes the shape of the desired product.
4. Ejector System: The ejector system is responsible for pushing the finished product out of the mold once it has cooled and solidified. It consists of ejector pins or plates that move forward, pushing the product out of the mold. This system ensures the smooth ejection of the product without causing any damage.

The Working Principle of Plastic Injection Molding Machines
The working principle of plastic injection molding machines involves several stages:
1. Mold Clamping: The two halves of the mold, the stationary side (cavity) and the movable side (core), are securely clamped together by the clamping unit. This forms a closed cavity where the plastic material will be injected.
2. Injection: The plastic material, in the form of pellets or granules, is fed into the injection unit's hopper. The material is then conveyed into the barrel, where it is heated and melted by electric heating elements. The rotating screw inside the barrel applies pressure and conveys the molten plastic towards the mold.
3. Injection and Packing: The molten plastic is injected into the mold cavity through a nozzle and runner system. The plastic fills the cavity and takes the shape of the desired product. Once the cavity is filled, the screw continues to apply pressure to pack and compress the molten plastic material to ensure it fully fills the mold and minimizes any defects.
4. Cooling: After the molten plastic has been injected and packed into the mold, it is left to cool and solidify. The cooling process can be accelerated by circulating coolant or water through cooling channels within the mold. Proper cooling is essential to achieve the desired dimensional stability and improve cycle time.
5. Mold Opening and Ejection: Once the plastic has cooled and solidified, the clamping unit opens the mold by separating the stationary and movable halves. The ejector system then pushes or extracts the finished product out of the mold cavity. Ejector pins or plates located on the movable side of the mold apply force to push the product out smoothly.
6. Mold Closing: After the product has been ejected, the mold halves are closed again, and the process can be repeated for the next cycle.

Throughout the injection molding process, various parameters such as injection speed, injection pressure, melt temperature, cooling time, and cycle time can be adjusted to achieve the desired quality and efficiency. By following this working principle, plastic injection molding machines enable the mass production of plastic products with high precision, repeatability, and efficiency.

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