Undercut-forming side inserts can be automated by use of pneumatic or hydraulic cylinders fixed to the mold. These control elements are arranged on the movable part of the mold such as the frame or...

In Fig. 7. 37 the gear 4 driving the racks 3 and 5 is turned by hand. The lower rack 5 is supported by pins 1. The upper rack 3 is supported by the guide used for guiding the side insert. Turning h...

The external thread on the workpiece is formed by wedge inserts as shown in Fig.7.32. By exchanging the worm in modern injection machines they are also suitable for the injection of thermosetting p...

The wedge inserts forming the undercuts are arranged on all four sides of the workpiece and come apart automatically upon opening of the mold as shown in Fig.7.31. The cube-shaped workpiece is prov...

The wedge inserts can be lifted above the dividing plane of the mold with buttons actuated by lifting bars as shown in Fig. 7.28. The wedge insert 2 is opened by the inclined ide cko. During ejecti...

The shape of the elbow pipes is spark erosion machined into blocks 26 and 24. The lower and upper parts of mold require careful fitting, otherwise workpieces will not be aesthetically accep table. ...