Several elements in plastic molds

1. Parting Surface: The contact surface between the plastic mold and the male mold when the mold is closed. The choice of its position and shape is influenced by factors such as the shape and appearance of the product, wall thickness, molding method, post-processing, mold type and structure, demolding method, and molding machine design.

2. Structural Components: Slider, inclined top, and straight top of complex molds. The design of structural parts is crucial; it relates to product lifespan, processing cycle, cost, product quality, and so on. Therefore, designing the complex structure of a mold core requires versatile skills from designers, and we strive to find simpler, more robust, and more economical design solutions.

3. Mold Accuracy: i.e., avoiding mapping, positioning, guide pillar, positioning pin, etc. The positioning system is related to the quality of the product's appearance, mold quality, and mold lifespan. Different positioning methods are chosen according to the different mold structures. Control of positioning accuracy mainly depends on processing. Internal mold positioning is mainly considered by the designer to develop a more reasonable and easily adjustable positioning method.

4. Runner System: That is, the feeding channel from the injection machine nozzle to the cavity, including the main runner, branch runner, gate, and cold cavity. In particular, the runner location should facilitate the selection of a good flow state with molten plastic to fill the cavity, and in an open mold (except for hot runner molds), the cold material attached to the product on the solid runner and runner can be easily removed from the mold.

5. Plastic Shrinkage and Factors Affecting Product Dimensional Accuracy: For example, mold manufacturing and assembly errors, mold wear. In addition, when designing molds for compression and injection molding, the matching of injection machine process parameters and structural parameters must be considered.