Principles of Designing Parting Surface

Principles of Designing Parting Surface

In the design of precision injection molds, the parting surface is to take out the molded plastic parts from the mold cavity and to meet the needs of insert placement and exhaust. According to the structure of plastic parts, the part of the mold is divided into several parts of the contact surface. Precision molds have higher precision requirements than ordinary molds, so the design of the parting surface is critical, and the results will directly affect the mold structure, processing difficulty and the costs. Because different design has different results even in the same product, so it does have some difficulty.

Principles of Designing Parting Surface

The competitive advantage of Xiamen Huaye Precision Mould(XHPM) over other injection mold manufacturers is that we have a complete set of design principles for parting surfaces. The mold design of XHPM is more efficient and cost-effective.

Now I will introduce the design principles of XHPM:

  1. The parting surface should be selected at the largest contour of the plastic part.
  2. The parting surface cannot be selected between the smooth surface and the apparent surface, so as not to affect the appearance quality of the parts.
  3. The parting surface should be conducive to exhaust. It is the main exhaust channel in a mold. We should place it at the end of the plastic melt flow direction as much as possible, and consider the design of the pouring system at the same time.
  4. The parting surface should facilitate lateral core pulling, and we had better to place the lateral core pulling mechanism on the side of moving mold.
  5. The parting surface should facilitate the demoulding of the plastic parts. Since the ejector is on the side of the moving mold, It should be as far as possible to keep the plastic parts on the side of the moving mold after opening the mold. This helps to set up the pushing mechanism in the moving mold part. If the pushing mechanism is set in the fixed mold, it will increase the complexity of the mold.
  6. The parting surface should facilitate processing and manufacturing. The cost, accuracy and a large part of the injection mold depend on the selection of the parting surface.

If you want to make a high-quality plastic mold with good material or know more knowledge about precision mold,

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