Generally, plastic parts can be taken out of the mold cavity by only one ejection, yet due to their special forms, it is still difficult to take out the parts from cavity or the parts can not fall off freely from the mold upon the completion of an ejection movement. […]
a most-commonly-used ejector unit only play the role as ejecting tools. Sometimes, mandrils can also partake in the molding of plastic parts according to the needs thereof. Such mandrils can then be made into the same shape as certain part of the plastic parts or just as core. […]
what is the simple ejector unit in a mold? […]
During each cycle of the injection and molding, the plastic part must strip from the cavity and core of the mold, […]
the first principle of designing ejector unit is the action point of the ejection force shall be near the core as much as possible since the plastic parts would enclasp the core when contracting.
the second principle of designing ejector unit is the ejection force shall be imposed upon the section of the plastic parts with the largest rigidity and intensity. […]
the third principle of designing ejector unit is the ejection position shall be set in the plastic parts or at the position with the least influence over the appearance of the plastic parts, thus ensuring the sound appearance of the parts.
the fourth principle of designing ejector unit is in case the ejection position shall be on the base level of the plastic parts for use or assembly, […]
today we are going to talk about design of the guiding and position mechanism, it include […]
cone position mechanism is a precise positioning form for the cone between the mold plate, which is mainly applied to large-sized and deep-recessed molds with thin plastic parts, […]