There are more types of injection molds, even for the same type of mold, due to different types of plastics, different opening and precision requirements, the assembly methods are different. Therefore, assembly before assembly.
1. Assembly and assembly benchmarks can be roughly divided into: (1) The main working parts of the plastic mold, such as the core, cavity and inlay quick assembly benchmark parts and other parts of the mold are the assembly benchmarks for preparation and assembly. (2) The processing and assembly base of the guide post and guide sleeve or the assembly reference plane of the mold side template.
2. Mold assembly accuracy and assembly accuracy include: (1) Zero, caddy accuracy, such as distance dimension accuracy, coaxiality, degree of equality, verticality, etc. (2) Relative motion accuracy, such as transmission precision linear motion and rotary motion accuracy. (3) Precision and accuracy of contact, such as clearance, interference of contact conditions. (4) Wall thickness dimension of plastic forming parts. For new molds, the forming wall thickness should be limited by part size.
3 principles: (1) repair repair draft, in principle, should ensure that the size of the main cavity within the tolerance range of the core should ensure the size of the small carbonyl tolerance range. (2) The fillet radius, the cavity should be smaller, and the core should be larger (3) When the mold horizontal parting surface and vertical parting surface are corrected, there should be a slight gap between the vertical parting surface and the horizontal parting surface. As the blank value > "Jize? After the small mold is painted red, the contact can be large, and the gap is about 0.02 mm (4) die. The bevel of the mold is clamped, the bevel is sealed, and the parting surface should have a gap of 0.02-0.03 mm. ( 5) The surface of the arc and wire connection repair is smooth, and the surface is not allowed to be affected, and the direction of the file opening is not allowed to wire.
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