DEM0021285MA - - Google Patents

Description

FATKNTANSPIiUClI:

Device for separating the press residue from strand or in the punch movement direction extruded solid and hollow bodies by means of the at the end of the pressing stroke automatically via the Punch face protruding cut edge of a ram axially displaceable in the punch, characterized in that the plunger (5) under the action of an energy store (6) stands whose force can only overcome the shear resistance of the pressed residue (8).

Referred publications:

German patent specifications No. 230 233, 546135, 596801, 735 139.

1 sheet of drawings

© 509 576/21 10.55

Claims (1)

M21285Ib / 7b The invention relates to a device for the Abi race I'rel.lrestes of in the direction of movement <\ v ^ punch strand or extruded solid and hollow bodies by means of the M-lbsttätig beyond the end face of the punch protruding on Elide of the pressing stroke cutting edge a StT that can be axially displaced in the punch) Ik ¹ Is. In order to automatically cause the cutting edge of the shear ram to step forward at the end of the pressing path, without the ram having to be stopped for this purpose, among other things, it is already being used the drive means of the 1'reßstempel or Stamp carrier has been proposed; but this solution requires a special mechanism about the movement of the drive means of the punch carrier at the relevant point in time on the shear ram transferred to. Such a mechanism is not required in the solution according to the invention. The initiation is that the plunger is under the action of a power spreader whose power to overcome only the resistance of the rest of the load able. I) the ignition-compliant disconnecting device leaves can be used to advantage in automatic extrusion presses. In the drawing, an embodiment of a tool according to the invention is in different Operational positions of the parts are shown schematically in side view, partly in longitudinal section. Fig. 1 shows the tool parts when inserted Blank before extrusion; Fig. 2 shows the parts of the tool with harvested extrusion after cutting off the Flange; Fig. 3 shows the essential parts of the tool with the extrusion ram and retracted stripped flange. (According to Fig. 1, a ring-shaped blank 1 in the transducer 2 rests on the die 3 and is touched by the riohlstempel.), while the plunger 5 with the pressure of the Tcllerfcdcrn 6 presses on the blank with the surface of a ring that extends from the The difference between the diameters J) ₁ and D. The punch.), And the plunger 5 are rigidly supported on the punch carrier 10. When the slenipel carrier runs forward, the extrusion pressure sets in, and the material of the blank 1 flows through the resulting from the difference in diameter / λ and / λ Gap between die 3 and ram 5 as a tube. Prop. 2 shows the tube 7 produced during extrusion. The residue forms a flange 8. As soon as the punch 4 has reached its lowest position, the plunger 5 snaps under the shear resistance of the flange 8 before the set spring pressure and shears the flange 8 from the pipe 7 away. The plunger 5 stands out from the stamp carrier ίο. Prop. 3 shows a position when the punch 4 is retreating. This pulls the flange 8 out of the receiver 2 out, whereupon the fleece is stripped on the stripper 9 surrounding it and falls down. To pull the flange 8 out of the pickup 2, the punch 4 has something behind its end face, an annular groove 11, into which material occurs during extrusion, which when The punch decline forms a kind of bracket for the flange. After the flange 8 has been stripped off, the transducer 2 is again for inserting a new blank free. The pipe 7, which is still sitting in the press behind the die, is passed through the next extruded tube pushed out of the die. No further aids are necessary, in order to carry out the extrusion described in automatic sequences. The rash of the plunger 5 for cutting the flange could take place by the spring 6 as shown by another, · / .. B. pneumatic means can be effected.