The driving force of injection mold processing movements (clamping force, injection mold clamping force, material hammer weight, extrusion force, etc.) is provided by the power transmission mechanism of molding machine and equipment. Injection mold processing first introduces plastic into the mold, then continuously rotates the mold along two perpendicular axes and heats it. The plastic in the mold gradually spreads evenly, melts and adheres to the entire surface of the mold cavity under the action of gravity and heat energy, forming the required shape and being cooled and formed. The following are commonly used driving methods in injection mold processing:
Electric power and rotation movement of pressure machines, frictional press machines, roller forging machines, etc. are provided by electric motors to drive the transmission mechanism. Other moving parts of the slider and mold are connected to drive the direction movement of the injection product mold. And then the driving force is transmitted to the mold to process the raw materials for injection molding.
Electric hydraulic drive generates hydraulic pressure through the hydraulic pump or water pump driven by the injection motor. And through the hydraulic transmission control system of the liquid, the hydraulic cylinder or piston connected to the moving parts of the injection system is driven by the rated pressure produced, thereby driving the directional movement of the moving mold and the relative translation movement to the fixed mold. Then further compress the material so that the material becomes an injection molded part after forming.
Pneumatic molding is mainly used in absorption and blow molding processing. The absorption processing refers to a certain negative pressure generated by an air pump when the blow molding mold is in a fixed state, so that the plastic sheet is directly sucked and pasted onto the mold surface to form a molded part. The gas with a certain pressure is generated by the air pump and blown into a cavity filled with hot-melt plastic or hot-melt glass, causing it to expand, deform and adhere to the mold cavity surface to form a molding part.
In addition, for injection molding supplies, the driving of injection mold processing such as aluminum alloy profiles, plastic profiles, sheets or films usually uses the extrusion molding process. The injection product mold is fixed on the head of the machine, and the material passes through the mold in the form of extrusion and acts on the mold relatively to produce various molding parts. For example, the plastic profile makes a spiral motion relying on the screw of a continuous extruder. The plastic is extruded into the mold and passes through the profile of the mold, and then cools and forms the molded material. The extruded profile is pulled forward by a traction mechanism to perform continuous molding processing.