How to choose the original positioning parts of injection mold custom processing workpiece?

 1. Injection mold custom processing workpiece to plane positioning


According to the number of degrees of freedom restricted by the plane, it can be divided into three types:


The main support surface restricts the positioning plane of the three degrees of freedom of the workpiece, and is often used for the positioning surface of the workpiece with relatively high precision.


The guide support surface is a positioning plane that limits the two degrees of freedom of the workpiece, and is often made into a narrow and long surface.


The thrust support surface is a plane that limits one degree of freedom. In order to ensure accurate positioning, the area of the plane is often made as small as possible.


2. Injection mold custom processing workpiece is positioned with a round hole


Long pins limit 4 degrees of freedom; short pins limit 2 degrees of freedom.


3. Injection mold custom processing workpiece outside cylindrical surface positioning


The positioning datum is the centerline of the outer circle. There are three commonly used


Positioning sleeve: to achieve centering and positioning Support plate: to position the outer circle


V-shaped block: realize the centering and centering positioning of the outer circular surface

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