Tips for mold set mainly include the following aspects:
Precautions for process screw processing: 4 process screws should be added between the lower fixed plate and the ejector plate to facilitate the fitter to match the oblique pins, ejector pins, etc.; when the RP uses a spring to return and has an oblique pin, add a demolding process screw between the male mold plate and the B04 plate; the slider sometimes needs to be repaired with clamping lines/biting/polishing between the female mold/male mold. For easy operation, it is necessary to design corresponding process screws and positioning surfaces; the mold core, wedge block, ejector block, slider pressure plate, wear-resistant plate, etc. need to add mold hanging screws. The size of the mold hanging screws of the same set of molds should be as consistent as possible to facilitate assembly and disassembly.
Precautions for ejector hole processing: The matching size requirements of flat top, dome, and double-section ejector, when the diameter is less than or equal to 2mm, must use a double-section ejector.
Precautions for mold frame processing: The bottom of the guide column on the mold frame should be introduced with a depth of more than 3mm to avoid air gaps to prevent lubricating oil from running to the parting surface; when there are components on the outside of the mold, consider adding footrests to prevent collision damage; to ensure the safety of mold transportation and mold racking, two transport plates are installed diagonally.
Ejector mechanism anti-collision mold mechanism setting: The design of square pins and ejector oblique pins should try to avoid contact with the mother mold core. If it cannot be avoided, a spring should be designed under the RP; when there are other moving parts such as ejectors under the slider, in order to prevent the ejector from interfering with the slider when the slider returns, the mold should be designed with a pull-back mechanism first, and then consider designing a quick return mechanism.
Oil tank setting: In order to increase the smoothness and wear resistance of relatively moving parts, an oil tank should be added on the relative sliding surface for lubrication to achieve an ideal oil storage effect and prevent oil from seeping into the product surface and causing pollution.
Micro switch setting: A micro switch must be used when there is a pull-back mechanism.
Slider rail design: The height of the slider rail should be at least 1/3 of the slider height to ensure the stability and smooth sliding of the slider; pay attention to opening lubrication grooves at the position with sliding friction to prevent the lubricating oil from flowing out.
Fixed mold core cavity processing: Small molds are generally processed by wire cutting to improve accuracy, and the cavity of larger molds is generally processed by milling, paying attention to its verticality; the mold frame is milled with a milling cutter with a depth of 0.2 to prevent the mold core from not being in place during assembly2.
Interpenetration processing of inserts and mold cores: The interpenetration of inserts and mold cores, mold cores and mold cores, and mold cores and mold frames generally requires a 1° slope to prevent damage during assembly; the length tolerance of the positioning part of the insert is -0.02, the size tolerance is -0.10, and the corresponding positioning tolerance of the mold core is +0.022.
Assembly process: Understand the number of mold templates, pins, guide pillars and other standard parts that need to be assembled and their models, sizes, etc.; know how many inserts and punches there are; divide the assembly into two parts and assemble them separately, and then close the mold at the end.
