What should be paid attention to in the design process […]
What should be paid attention to in the design process of plastic mold
Plastic mold design and manufacturing are closely related to plastic processing. The success or failure of Plastic furniture mould processing depends largely on the mold design effect and mold manufacturing quality, and the plastic mold design is based on the correct plastic product design.
The structural elements to be considered in plastic mold design are:
The parting surface is the contact surface where the concave mold and the convex mold cooperate with each other when the mold is closed. The selection of its location 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.
Structural parts, namely sliders, inclined tops, straight top blocks, etc. of complex molds. The design of structural parts is very critical and is related to the life of the mold, processing cycle, cost, product quality, etc. Therefore, designing the core structure of a complex mold requires a designer to have a higher comprehensive ability, and strive for simpler, more durable and more economical Design.
The precision of the mold, namely, avoiding jams, precise positioning, guide posts, positioning pins, etc. The positioning system is related to the appearance quality of the product, mold quality and life. According to the different mold structure, different positioning methods are selected. The positioning accuracy control mainly depends on processing. The inner mold positioning is mainly considered by the designer to design a more reasonable and easily adjustable positioning the way.
Gating system, that is, the feed channel from the nozzle of the injection molding machine to the cavity, including the main runner, runner, gate and cold slug. In particular, the selection of the gate position should be conducive to the molten plastic filling the cavity in a good flow state. The solid runner and gate cold material attached to the product are easy to eject from the mold and be removed when the mold is opened. Except for road model).
Plastic shrinkage rate and various factors that affect the dimensional accuracy of products, such as mold manufacturing 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.