how to drive unscrewing equipment in a mold
when a mold has an set of unscrewing equipment or more. How to drive them, yes! The drive force for these mold is transmitted from the opening movement by a lead screw with coarse threads or a rack. […]
a mold with unscrewing equipment
in all the molds with unscrewing equipment, please pay your attention to an exact mounting and alignment of cores and device units. For example, insufficiently supported cores, particularly slender cores, can be shifted from their center position by the entering plastic material.
design an unscrewing device in a mold
hey！everybody， please don’t forget one detail during designing an unscrewing device in a mold, that is very important, do you know what? Yes! Please make sure if this part is designed in this way that it can be protected against rotation.
threads should be screwed off or out of the part
no matter cores for internal threads or sleeves for external threads，the mold is either open or closed，they should be rotated in the mold， during demolding， they should be screwed off or out of the part。
the features of three-plate mold
as for three-plate mold, it has the following features: […]
the features of two-plate mold
two-plate mold and three-plate mold are basic mold structure, at first, the features of two-plate mold are: […]
marking, symbols, and characters on a plastic part
there are three structures for marking, symbols, and characters on a plastic part, they are protrusion, depression, and a boss on a depression.
how to design a marking on a plastic part
but how to design a marking on a plastic part, the key is that the making should be in parallel to the ejection direction. and the draft must assure the wrinkle design on the side of the plastic part can be properly ejected.
design a right plastic part
nowadays, more and more plastic part come into our daily live, and you can find some of plastic parts may exist markings of protrusion, depressions, or leather-like wrinkles. […]
residual force may linger in the plastics around the insert
residual force may linger in the plastics around the insert. The amount depends on the plastic material type, insert material, insert structure, […]