In the development of the automobile industry, the demand for plastic parts is increasing day by day, because the construction of automobiles has a very high application degree of plastic parts. That is to say, the quality of plastic parts has a huge promotion effect on the development and construction of the automobile field. This makes plastic parts need to have quality assurance in production, and it is the mold that determines the quality of plastic parts.

The basis of injection mold design

1.1 Plastic product design is the focus

Plastic products are definitely a key point in the design of injection molds. For the design of plastic products, the requirement is nothing more than simplifying the plastic product model as much as possible, especially the concave and undulating design should not appear in the design of plastic products.

1.2 Classification of plastic products in structural design

The inner and outer sides of the plastic product must have a demolding slope that meets the demolding standard, which is more conducive to demolding. In order to make its appearance smooth and demould not be hindered by friction, plastic products should be streamlined and smooth in curvature and texture as much as possible. Plastic products have sharp edges and corners, and these corners are rounded corners. To solve the problem of curvature, the tension of the arc should be larger on the peripheral corners of the inner and outer sides of the plastic product, which is very necessary.

Basic requirements of an injection mold for mold components.

The strength and hardness must reach a certain standard, otherwise it will not withstand the friction, which will affect the construction quality. The minimum hardness requirement must not be less than HRC35. Very few special requirements require the hardness above 50～52HRC. The product must be made after molding. The surface is glossy, which can be achieved by polishing. In addition, the cavity part needs to be polished. The sample of the product cannot deviate from the product requirements, and then the management and construction

technology are used to improve production efficiency and save costs.

Determining number of cavities

The method to determine the number of cavities can use all injection machines, and then confirm the number of injections and the rated clamping force of the injection machine. In the process of the number of model cavities, other factors need to be combined to complete, such as: molding process, precision and maintenance, and economy.

Look for mold parting line and surface

The method of determining mold parting line can be determined according to the shape of the part. The function of the parting line is nothing more than to divide the product into two parts, with the same dividing line. The two parts are divided into a fixed mold and a movable mold. To obtain the parting surface of the mold, the parting line can be used, and the parting surface of the mold can be determined by scanning the parting line around the two mold parts.