What are the Design Elements of Plastic Molds

The design of plastic molds is a complex and systematic project, and its design elements involve many aspects. Let's take a look at them together.

1. Parting surface, that is, the contact surface between the concave mold and the convex mold when the mold is closed. The selection of its position and form is affected by factors such as product shape and appearance, wall thickness, molding method, post-processing technology, mold type and structure, demoulding method and molding machine structure.

2. Structural parts, that is, sliders, inclined tops, straight top blocks, etc. of complex molds. The design of structural parts is very critical, which is related to the life of the mold, processing cycle, cost, product quality, etc. Therefore, the design of the core structure of complex molds requires high comprehensive ability of designers, and strives to pursue simpler, more durable and more economical design solutions as much as possible.

3. Mold accuracy, that is, card avoidance, precise positioning, guide pillars, positioning pins, etc. The positioning system is related to the appearance quality of the product, mold quality and life. According to different mold structures, different positioning methods are selected. Positioning accuracy control mainly depends on processing. The positioning of the inner mold is mainly considered by the designer to design a more reasonable and easy-to-adjust positioning method.

4. The pouring system, i.e. the feed channel from the injection molding machine nozzle to the cavity, includes the main channel, branch channel, gate and cold material hole. In particular, the selection of the gate position should be conducive to the molten plastic filling the cavity in a good flow state, and the solid runner and gate cold material attached to the product can be easily ejected from the mold and cleaned when the mold is opened (except for hot runner molds).

5. Plastic shrinkage rate and various factors that affect the dimensional accuracy of the product, such as mold manufacturing and assembly errors, mold wear, etc.

Qingdao Xueyu Molding Products Co., Ltd. is mainly engaged in the design and manufacturing of injection molds, injection molding and secondary processing (spraying, pad printing, ultrasonic welding, stamping), etc. For more information about plastic mold, please contact us.

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