When we decide to make textures and lettering on the plastic parts, depth and draft should be considered, draft for texturing is somewhat dependant on the mold design and the specific mold texture. […]
Today I check some mold designs from some Young mold designers, I find a common and Easily neglected problem—they often forget to add drafts in some areas, maybe they don’t realize it’s importance, […]
Today we discuss how to evaluate the stress concentration factor in a plastic part, actually in last blog, you can find a small illustration, please look at it carefully. there is a Mathematical relationship between radius and thickness for the stress concentration factor. it means when R/T values lesss than 0.5, the stress concentration factor [...]
Boss design is a common design in a plastic part, it is used for mating part or for attaching fasteners such as screws or accepting threaded inserts. […]
after heat treatment, the machined inserts are finished, ground and polished to obtain a good surface quality,because the surface conditions of a cavity are, in the end, responsible for the surface quality of a plastic part and its ease of release. Defects in the surface of the cavity are reproduced to different extends depending on [...]
Much has been written and discussed relative to the cooling of mold cavities. Most molders and moldmakers are at least aware of the benefits of placing as much heat removal technology into a mold core or cavity as possible. Simply drilling a hole into the bottom of a core for a closure and inserting a [...]
cooling at the gate part should be intensified, for cooling only, avoid setting the medium channel at the welding mark of the plastic parts, whereas the heating of medium channel should be preferably near the welding mark. […]
distance from the medium channel to cavity surface should be as equal as possible. […]
on the other hand, in order to remove such defect as the welding mark and to produce plastic parts with high lucency, dielectric such as high temperature and high pressure steam, high pressure hot water or thermal conducting oil should be applied to the molds to raise surface temperature molds. […]
temperature of plastic molds directly influences the molding quality and productivity of plastic parts, for thermoset plastics, […]