heating with electrical bar
if mold temperature is required to be above 80 Celsius degrees, a heating device shall be needed. […]
temperature of plastic molds is very important
temperature of plastic molds directly influences the molding quality and productivity of plastic parts, for thermoset plastics, […]
introduction to secondary ejector unit
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. […]
introduction to a most-commonly-used ejector unit
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?
what is the simple ejector unit in a mold? […]
the tripping mechanism of a mold
During each cycle of the injection and molding, the plastic part must strip from the cavity and core of the mold, […]
the action point of the ejection force
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 ejection force shall be imposed upon the section of the plastic parts
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 ejection position shall be set in the plastic parts
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 ejection position shall be on the base level of the plastic parts for use or assembly
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, […]