Horizontal Presses for Direct Extrusion

When extruding cast billets, of which only the faces are machined, a shell forms in the container, the thickness of which is about 2 to 3 mm depending on the billet diameter. It containes oxides, dross and other casting impurities and eliminates the need for machining the billets. If this shell were to be pulled out of the container after the extrusion by means of the ram, a very high pullback power would be required. Therefore a loose dummy block, whose diameter is slightly larger than that 

When charging the press, the billet is inserted in the container from behind the press through the counterplaten. Then the die-holder is put 

The press rests on a base frame which is grouted with the foundation. It has a guide m for the plunger crosshead n which prevents a one-sided wearing of the sealing due to the w eight of the piston. 

In the press, as shown in Fig. 58 and 59, the container is rigidly connected to the counterplaten by means of a jacket. The die-holder is set 

The weight of the container and its jacket rests on the tw o bottom columns, on which the plunger crosshead slides, too. The ram may be adjusted in the plunger crosshead by means of setscrews so as to be able to compensate for any off-center position. 

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