Fig.7.6 shows the configuration of mold with internal concaves. The guide pin 2 is fixed in the stationary frame plate 1, the side insert 3 is in the movable mold. The workpiece has two internal co...

When plastic material is injected into a mold cavity, it is cooled and solidifies to from a part that is made to final part dimensions.However, if the cooling of this part in the mold is not uniform,

Inclined guide pins are frequently used for the actuation of side inserts as shown in Fig.7.5. The guide pins 15 are fixed in the stationary clamping plate 18.

Voids are formed inside the wall of a part and can adversely affect the structural performance of the part. Except in transparent parts, voids can be invisible to the naked eye.

​Fig 7.3 shows that an undercut-forming side insert is pulled out by a spindle. The undercut forming side pins I can also be pulled out of the nest with the aid of the threaded spindle 5. The side...

Splay marks, also referred to as silver streaks, appear as a blister that radiates over the surface of a part from the gate. If you were to take a small, sharp metal blade and scrape one of these

The undercut-forming pin can be inserted into the mold plate so that it can be moved as shown in Fig.7.2.

Sink marks on a plastic part appear as a depression or dip on the part surface. These are created when the shrinkage of the molten core of a part wall is greater that that of the skin. This larger shr

Gloss is defined as the amount of light that is reflected off a surface. The rating used for gloss based on how much light is reflected at different angles and the degree of light that is scatte...