Injecteion Mould Design And Farbrication

The configuration and use of mold temperature machine Mold temperature machine configuration should be based on the processing of materials, mold weight, the required preheating time and productivity kg / h to determine. When using HTF, the operator must comply with the following safety rules: Do not place the mold temperature control unit close to the heat source furnace. Use conical leak-proof and pressure-resistant hoses or tubes. Periodically check Temperature control loop mold temperature machine, joints and mold leaks, the function is normal; regular replacement of heat-conducting oil; artificial synthetic oil should be selected, thermal stability, small tendency to coking. In the use of mold temperature, choose the right thermal fluid is the key. The use of water as a heat-conducting fluid is economical, clean and easy to use. Once the temperature control loop, such as a hose coupling, leaks, the water flowing out can drain directly to the sewer. However, the use of water as a heat-conducting fluid also has the disadvantage that water has a low boiling point; depending on the composition of the water, it may corrode and scale, causing an increase in pressure loss and a decrease in the heat exchange efficiency between the mold and the fluid. When using water as a heat transfer fluid, the following precautions should be considered: Pre-treatment of temperature control circuits with anticorrosive agents; use of filters in front of water intakes; and regular cleaning of water machines and molds with derusting agents. The use of HTF has no water shortcomings. They have a high boiling point and can be used at temperatures above 300 ° C or even higher. However, HTFs have a heat transfer coefficient of only one-third that of water, so there is not a wide range of water temperature machines for injection molding.

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injecteion mould design and farbrication

Injection molding according to molding characteristics are divided into thermosetting plastic mold, thermoplastic mold two; according to the molding process is divided into pass mold, blow mold, casting mold, thermoforming mold, hot mold (compression mold), injection mold, etc. , In which the hot stamper to flash way can be divided into spill type, semi-overflow type, not spill type three injection molding system to pouring can be divided into cold runner mold, hot runner mold two; by loading and unloading Can be divided into mobile, fixed two.

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The injection mold consists of a moving mold and a fixed mold. The moving mold is installed on the moving template of the injection molding machine and the fixed mold is installed on the fixed mold of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to remove the plastic product.

Although the structure of the mold may vary due to the variety and properties of the plastic, the shape and structure of the plastic, the type of the injection machine, etc., the basic structure is the same. Mold mainly by the pouring system, temperature control system, forming parts and structural components. One casting system and molding parts are in direct contact with the plastic part, and with the plastic and products change, is the most complex mold, the most varied, requiring the highest processing finish and accuracy of the part.

Gating system refers to the plastic part of the runner from the nozzle into the cavity, including the main runner, cold material hole, runner and gate. Forming parts refers to the various shapes that make up the product, including moving parts, fixed molds and cavities, cores, forming rods and exhaust vents. Typical mold structure as shown.

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