Precision Requirements for Plastic Mold Parts
2025,11,13
To ensure the proper operation of the plastic mold, the punch and die inserts must fit together. During the design phase, dimensions and tolerances must be strictly adhered to. The perpendicularity between the insert surface and the cutting edge must not exceed 0.01 mm, and there should be no reverse taper, looseness, or overlapping insert seams.
Unless the design specifically allows welding, welding is generally not permitted for the fixing parts of the inserts and cutting edges, as some inserts require surface treatment later.
Part number markings should ideally be applied to the punch and die, the fixing plate, and the mounting plate. The chamfering of the cutting edge should be determined based on the size of the part. The working surfaces of exposed and concealed keys must be perfectly aligned and without gaps.
The parallelism between the fitted key and the two fitted surfaces is required; specific values need to be determined based on the type and characteristics of the plastic mold.
The coaxiality of the guide post holes and guide sleeve holes on the upper and lower base plates should not exceed 0.01 mm. There should be no cracks or looseness in the mounting positions of the working parts on the base plate. Burrs on the lifting platform must be removed promptly. The chamfer size of the upper and lower base plates should be determined according to the overall size of the mold.
Huiwen is a mold manufacturer specializing in plastic molds, various plastic shells, injection molding, mold making, spray painting and screen printing, and product development and assembly. Partnering with Huiwen can greatly guarantee the quality of your products, and the plastic products produced by Huiwen are exquisite and beautiful, loved by a wide range of customers.
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