Method for mending excessive polishing of die cavity edge of shot-off forming master die cavity

A master mold and mold cavity technology, which is applied in the field of avoiding excessive polishing of the edge of the mold cavity of the injection molding master mold cavity, can solve the problem of lack of excessive polishing of the mold cavity edge, and achieve the effect of avoiding burrs
CN1603058AInactive Publication Date: 2005-04-06BENQ CORP
0 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BENQ CORP
Publication Date
2005-04-06
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a manufacturing method of the master die cavity which is used to shoot up forming die. It can prevent the edge of the die cavity from over buffing. An auxiliary gripper is utilized to protect the master die cavity while buffing. The auxiliary gripper has a center hole, and its shape is corresponded to the edge of the die cavity. The manufacturing method includes the following steps that the corresponding fixed structure and location structure are forming at a die cavity rough blank and auxiliary gripper. The auxiliary gripper is located at the die cavity rough blank by the location structure. And the relative relation of the auxiliary gripper and the die cavity rough blank is kept in constant by the fixed structure. The composite unit formed by the auxiliary gripper and the die cavity rough blank is practiced electro discharge machining programming by an electrode. The required master die cavity is made in the concave center of the die cavity. The composite unit is practiced buffing programming. Then the fixed structure is loosened. The auxiliary gripper is moved away from the master die cavity, so that the intact and satisfactory master die cavity is gained to practice the subsequent programming to shoot up the forming die.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for avoiding excessive polishing of the mold cavity edge of an injection molding female mold cavity. Background technique

[0002] Many plastic injection molded products, such as casings of mobile phones, digital cameras, etc., need to be produced using master mold cavities. A master mold cavity is often used to produce more than ten thousand pieces of plastic injection molded parts (jnjected parts), therefore, the quality of the master mold cavity affects the quality of the entire batch of plastic injection molded parts. The master cavity must undergo a polishing procedure to make the surface inside the cavity of the master cavity smoother for injection molding. However, during polishing, the edge of the mold cavity of the female mold cavity is often slightly deformed due to excessive polishing.

[0003] See Figure 1, Figure 2A and Figure 2B , FIG. 1 is a schematic diagram of a known female mold cavity 10 . Figu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More