Patent ID: 9492855
Filing Date: 2016-11-15
CPC Classification: B21C,B30B

Claim Text:
1. A system including a dummy block and an extrusion ram, wherein the dummy block is installable on the extrusion ram of an extrusion device, the dummy block comprising at least one filler piece having a pressing surface via which a force can be exerted onto a material that is to be extruded, and an outer diameter of the filler piece being configured conically with an outer conical surface and being surrounded by a sealing ring which forms part of the dummy block and whose inner diameter is dimensioned such that an inner conical surface of the sealing ring and the outer conical surface of the filler piece form a gap, and, between the filler piece and the sealing ring, there is at least one radial gap that widens conically from an inside portion towards an outside portion, whereby the filler piece and the sealing ring can be installed on the extrusion ram by means of a connecting element, and a return force of the extrusion ram can be transmitted to the sealing ring via the connecting element, said sealing ring being rotatable around the axis of rotation of the dummy block and, depending on the direction of rotation, a secured connection of the dummy block to the extrusion ram against axial movement can be established or released such that the sealing ring and the filler piece can be installed in and dismantled from the extrusion ram via a side of the dummy block, said dummy block further comprising the connecting element, and said connecting element being a circumferential connecting member having an end face that can absorb the compressive forces during an extrusion process, whereby at least part of the end face of the connecting element and at least part of an adapter surface of an adapter piece are relatively movable and said at least part of the end face of the connecting element is in contact with said at least part of said adapter surface of the adapter piece, and at least part of an inner surface of the sealing ring opposite from and spaced from the material to be pressed is likewise in contact with at least part of the surface of the adapter piece when extrusion pressure is applied onto the dummy block and whereby prior to the application of extrusion pressure onto the dummy block, said at least part of the end face of the connecting element is not in contact with said at least part of said adapter surface of said adapter piece to permit venting of air during the application of extrusion pressure onto the dummy block.