Mold injection molding is a kind of processing method used in mass production of complex parts of shape. The specific principle refers to: the heat of plastic raw materials from the injection molding machine screw into the high pressure into the plastic mold cavity, after cooling and curing, get plastic forming products.
The plastic mold is composed of two parts: movable mold and fixed mold. The movable mold is installed on the moving mold of the injection molding machine, and the mold is installed on the fixed template of the injection molding machine. In the injection molding, the movable mold and the fixed mold are closed to form the pouring system and the cavity, the mold is fixed and the mold is separated to remove the plastic product.
Although the structure of the mold due to the variety and performance of plastic, plastic products, shape and structure, as well as the type of injection machine may be different, but the basic structure is consistent. Mold mainly by the casting system, thermostat system, forming parts and structural components. The casting system and molded parts are in direct contact with the plastic parts, and with the plastic and products and changes, is the most complex mold, the largest change, requiring processing of the highest degree of finish and precision.
Injection mold is a tool for the production of plastic products; is also given a complete structure of plastic products and precise size of the tool. Injection molding is a processing method used in mass production of complex parts of a shape. Specifically refers to the heat of the plastic from the injection molding machine high-pressure injection into the mold cavity, after cooling and curing, to be molded products.
The injection mold is composed of two parts: moving mold and fixed mold. The moving mold is installed on the moving mold of the injection molding machine, and the mold is installed on the fixed template of the injection molding machine. In the injection molding, the movable mold and the fixed mold are closed to form the pouring system and the cavity, the mold is fixed and the mold is separated to remove the plastic product. In order to reduce the heavy mold design and manufacturing workload, injection molds are mostly used standard mold.
1. Single part of the mold mold mold, mold and die separation, and thus remove the plastic parts, said single sub-surface mold, also known as double-plate mode. It is the most simple and most basic form of injection mold, it can be designed as a single cavity injection mold, can also be designed into multi-cavity injection mold, is the most widely used an injection mold.
2. Two-part surface mold mold Two-part surface injection mold has two sub-surface, and single-part injection molding mold compared to double-part injection molding mold in the fixed part of the increase can be a local movement of the middle plate (Also known as the activities of the gate plate, which is equipped with gate, runner and die required for other parts and components), it is also called three-plate (moving template, intermediate plate, fixed template) injection mold, which is commonly used in Point of the single-cavity or multi-cavity injection mold, open mold, the middle plate in the fixed guide column with the fixed template for a distance separation, in order to remove the two between the template pouring system condensate material. Double parting mold mold structure is complex, high manufacturing costs, parts processing difficulties, generally not for large or large plastic products molding.
3. Injection molding with lateral and core pulling mechanism When the plastic parts have side holes or side concave, the need to use the side of the movement of the core or slider molding. After the injection molding, the movable die is first moved downward for a distance, and then the slanting section of the bending pin fixed on the fixed plate is forced to move outward, and the plunger of the stripping mechanism is pushed to push the push plate, Off the core.
4. Injection Molds with Movable Forming Parts Due to some special construction of plastic parts, it is required that the injection mold be provided with movable forming parts such as movable punch, movable die, movable insert, movable thread or type Ring, etc., in the mold can be removed with the plastic mold out, and then separated from the plastic parts.
5. Automatic thread unloading mold on the threaded plastic parts, when asked to automatically stripping, the mold can be set on the rotation of the threaded core or ring, the use of open-mode action or injection molding machine rotating mechanism, or set Special drive, driven screw thread or threaded ring rotation, which out of plastic parts.
6. No flow injection mold No flow channel injection mold refers to the use of the adiabatic heating method of the channel, from the injection molding machine nozzle between a plastic cavity was molten state, so that the mold out of plastic parts without pouring system condensate material. The former said adiabatic flow channel injection mold, the latter said hot runner injection mold.
7. Right angle injection mold Right angle injection mold is only applicable to the angle injection molding machine, and other injection mold is different from the mold in the molding process when the direction of feeding and opening and closing direction perpendicular. His main channel opened in the moving, fixed parting on both sides, and its cross-sectional area is usually the same, and other injection molding machine with the mold is different from the end of the main channel, in order to prevent injection molding machine Nozzle and the main channel inlet end of the wear and deformation, can be set to replace the flow channel inserts.
8. Mold release mechanism in the mold on the injection mold In most injection mold, the stripping device are installed in the dynamic mode side, which is conducive to the injection molding machine opening and closing system in the work of the ejector device. In the actual production, because some of the plastic parts by the shape of the restrictions, the plastic parts to stay in the mold side of the molding better, which makes the plastic parts from the mold out, it must be set in the mold side of the mold release mechanism.