What Should Be Considered in the Plastic Mold Design?

Plastic mold design and manufacturing are closely related to plastic processing. The success or failure of plastic processing depends largely on the impact of plastic mold design and mold manufacturing quality, while plastic mold design is based on correct plastic product design. What are the structural elements to be considered in the design of plastic molds? Let's take a look together.

1. Parting surface of plastic mold design

That is, the contact surface where the die and the punch cooperate with each other when the die is closed. The choice of product location and form is affected by factors such as product shape and appearance, wall thickness, molding method, post-processing technology, mold type and structure, demolding method, and molding machine structure.

2. Structural parts for plastic mold design

That is, the slider of complex mold, inclined top, straight top block, etc. The design of structural parts is very critical, which is related to the life of the mold, processing cycle, cost, product quality, etc. Therefore, designing the core structure of complex molds requires designers to have higher comprehensive capabilities and strive to make them simpler, more durable, and more economical.

3. Mold accuracy of plastic mold design

That is, avoid paper jams, precise positioning, guide posts, positioning pins, etc. The positioning system is related to the appearance quality, mold quality and life of the product. According to different mold structures, choose different positioning methods. The positioning accuracy control mainly depends on the processing, and the positioning of the inner mold is mainly considered by the designer as a more reasonable design and easy to adjust positioning method.

4. Door control system for plastic mold design

That is, the feed channel from the injection molding machine nozzle to the cavity, including the main channel, the runner, the gate and the cold cavity. In particular, the gate location should be chosen to favor the molten plastic filling the cavity with good flow. Solid runner and sprue cold material adhering to the product is easily ejected from the mold and can be removed when the mold is opened, except for road models.

The plastic shrinkage rate of automobile mold manufacturers and various factors that affect the dimensional accuracy of products, such as plastic mold fabrication and assembly errors, mold wear, etc. In addition, when designing compression molds and injection molds, the matching of process and structural parameters of the molding machine should also be considered. Computer-aided design technology has been widely used in plastic mold design.

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