Injection molding machine, abbreviated as injection molding machine

Injection molding is the process of using the thermophysical properties of plastic to feed materials from a hopper into a barrel. The outside of the barrel is heated by a heating ring, causing the material to melt. Inside the barrel, there is a screw that is driven to rotate by an external power motor. The material is transported forward and compacted along the screw groove under the action of the screw. The material gradually plasticizes, melts, and homogenizes under the dual action of external heating and screw shearing. When the screw rotates, the material is pushed to the head of the screw by the frictional force and shear force of the screw groove. At the same time, the screw retreats under the reaction of the material, forming a storage space at the head of the screw, completing the plasticization process. Then, the screw is pushed by the piston thrust of the injection cylinder. Inject the molten material in the storage chamber into the mold cavity through a nozzle at high speed and high pressure, After the molten material in the mold cavity is pressurized, cooled, solidified and shaped, the mold is opened under the action of the mold closing mechanism, and the shaped product is ejected and dropped from the mold through the ejection device.

There are three types of configurations for mold parts and injection parts: horizontal, vertical, and angular

(1) Horizontal injection molding machine: Horizontal injection molding machine is the most commonly used type. Its characteristic is that the center line of the injection assembly is concentric or consistent with the center line of the mold assembly, and parallel to the installation ground. Its advantages are low center of gravity, stable operation, convenient mold installation, operation, and maintenance, large mold opening, and small space occupation; But it occupies a large area and is widely used in large, medium, and small computers.

(2) Vertical injection molding machine: Its characteristic is that the axis of the mold clamping device and the injection device are arranged in a straight line and perpendicular to the ground. It has the advantages of small footprint, easy mold assembly and disassembly, easy installation of inserts, uniform plasticization of materials falling from the hopper, easy automation and multi machine automatic line management. The disadvantage is that the ejected product is not easy to automatically detach, often requiring manual or other methods to remove, making it difficult to achieve fully automated operation and large-scale product injection.

(3) Angle injection molding machine: The axes of the injection device and the clamping device are arranged perpendicular to each other. According to the relative position between the centerline of the injection assembly and the installation base, there are three types: horizontal, vertical, and horizontal. ① Horizontal, the centerline of the injection assembly is parallel to the base, while the centerline of the mold assembly is perpendicular to the base. ② Vertical and horizontal, the centerline of the injection assembly is perpendicular to the base surface, while the centerline of the mold assembly is parallel to the base surface. The advantage of the angle injection machine is that it combines the advantages of both horizontal and vertical injection machines, making it particularly suitable for molds with asymmetric geometric shapes for opening side gates.