In the preparation stage of automobile stamping parts, after weighing the plastic powder, it is first poured into the feeding chamber and heated to a plastic state. In the pressing stage, when the pressing column moves down on the working table of the hydraulic press, it enters the feeding chamber to pressurize the molten plastic, injects it into the mold cavity at a high speed through the pouring system of the mold, and guarantees heat preservation for a certain period of time to harden and form.
In the unloading stage, after the mold is opened, the plastic parts are ejected by the special unloading mechanism, and the mold cavity, the feeding chamber and the runner are cleaned, and the next stroke is ready for extrusion.
Design points of progressive die for precision stamping parts:
1. Die fillet radius of progressive die for precision stamping parts
The fillet radius of the concave die of the progressive die for precision stamping parts should be consistent in all directions. Otherwise, when bending, the blank will slide and the product will be offset, which will affect the accuracy and size, and when designing the progressive die, the radius of the bending fillet should be selected appropriately, and should not be too large or too small. The size of the corner radius to cause local deformation or thinning of the product, affecting the quality and surface roughness of the product.
2. To prevent blank deflection during bending
When designing a die for precision stamping parts, in order to prevent the offset of the blank during the bending process, the following preventive measures should be taken: the die should be equipped with an elastic pressing device, and it should be noted that part of the leather should be in a state of elastic compression before bending. Bend.
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