There is a close correlation between the design and manufacturing of plastic molds and plastic processing. The success or failure of plastic processing largely depends on the effectiveness of mold design and the quality of mold manufacturing, and plastic mold design is based on the correct design of plastic products. So what structures must be considered in the design of plastic molds? Let's take a look together:
1. Parting surface: refers to the contact surface between the mold cavity and the mold seat when the mold is closed. The selection of its parts and methods is affected by factors such as product appearance and appearance, wall thickness, forming method, post production process, mold type and structure, mold release method, and forming machine structure
2. Structural components: namely, guide rail sliders, inclined guide pillars, straight top blocks, etc. for complex molds. The design of structural components is very important, which is related to the service life of the mold, production and processing cycle time, cost, product quality, etc. Therefore, the design of complex mold key structures has high requirements for the designer's comprehensive ability, and strive for a perfect, simpler, more durable, and more economically developed solution design
3. Mold accuracy: i.e. avoiding jamming, precise positioning, positioning pins, snap springs, etc. The mobile positioning system is related to the appearance quality of the product, mold quality, and service life. Depending on the design of the mold, different precise positioning methods are selected. The key to precision level control is production processing. The precise positioning of the core mold is mainly considered by the designer to design more effective and easy to adjust precise positioning methods
4. Pouring system: refers to the feeding safety channel from the plastic machine nozzle to the middle of the concave mold, including the popular channel, separation channel, glue inlet, and cold material hole. Especially, the selection of the glue inlet position should be beneficial for the molten plastic to fill the concave mold with good fluidity, and the solid flow passage attached to the product and the cold material at the glue inlet should be easy to eject from the mold and eliminate it during demolding
5. The shrinkage rate of plastics and various factors that affect the dimensional accuracy of products, such as mold manufacturing and installation deviations, mold damage, etc. In addition, when designing compression and injection molds, consideration should also be given to the matching of the processing technology and main structural parameters of the forming machine. Auxiliary design techniques have been widely used in plastic mold design. In addition, during the design process of plastic molds, it is also necessary to consider the standard parts of the mold, so that the entire set of molds can achieve the best results and promote the smooth development of plastic molds during the injection molding process
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