Fig. 6.41 is a configuration of the stripper plate of a mold actuated by a pneumatic cylinder. The stripper ram I connects the mold and cylinder. The one end of stripper ram is fixed to the station...

Ribs are longitudinal protrusions on a plastic workpiece that way be used for a number of purposes. The first purpose is to add strength to a workpiece or to add aesthetic features to a workpiece. Th

The ejector system is built into the mobile part of injection machine. For some workpieces, the shape of their external and internal surfaces makes it difficult to decide whether the workpiece rema...

​The nominal wall thickness effects not only on the strength of workpiece, but also on the haracteristics such as performance, surface aesthetics, appearance, moldability, and economics, so that

The two ejection systems shown in Fig. 6.39 consisting of plates 12, 13, 16 and 17 start at the same time, because the lock 7, pushed by spring 6 and screw 5, is engaged with the up groove of pin 4...

Draft angle(Fig. 2. 1)is critical in workpiece design since this directly affects how easily ar object can be ejected from a mold but without be damaged. A slight angle is recommended for all thermopl

Two-step Ejection by Swing Bar The lower system starts, the upper system begins the ejection only in the second step as Fig 6.36 shows. The mold opens, while the ejector bar 7 which engages the sto...

The definition of injection molding is as a method of producing objects which is done by the use of an injection molding machine with a heat-meltable plastics material. The shape of products is contro

Why do some polymer materials need to be dried before injection molding? The chemical structure of a particular polymer determines whether it will absorb moisture due to their polar chemical structure