DE1981312U - EXTRUSION PART. - Google Patents

Description

^ - // YEREINIGfE

Extruded part

The innovation concerns an extrusion part, such as a washer, Pressure plate or a pressure piece, for the production of extruded hollow profiles or pipes.

The innovation compared to the hitherto customary design of an extrusion press serving these purposes is due to the following Explanations on the basis of the attached drawing.

When pressing hollow profiles and pipes 1 from solid bars 2. The following difficulty arises over the press mandrel 3:

After moving the bar 2 into the recipient en 4- is the Press mandrel 3 pressed in such a way at the same time slightly retracting the ram 5 in the press ingot 2 that this around the Press mandrel forms a cavity.

The pressed out material causes an elongation of the billet, at the same time the bar facing the tool (die) 6 is turned Bar surface a pipe or profile strand 1 with slugs 7 expressed. As soon as the ram is set, the exit begins of the pipe or hollow profile strand closed at the end by the slug through the tool backings 8, 9 and 10, Counter holder 11 of the press etc. in the discharge track 12.

The evacuated cavity 13, which is constantly increasing, is thus exposed to the pressure of the outside atmosphere; as a result occurs

Collapse of the profile or pipe walls, if not in time a pressure equalization by drilling into the cavity . can be brought about. .

So far this has only been made possible when the hollow strand has emerged from the press so far that from the front 12 by means of e.g. magnetic hammer, burning electrode or hand drill, the profile or pipe wall behind the slug can be broken open.

Apart from the fact that this handling is dangerous for accidents, it has the disadvantage that a significant proportion of the length to be squeezed out has already collapsed and thus represents scrap.

The purpose of the innovation is not to ventilate the hollow strand only after the strand has emerged from the press, but already after the strand has been formed behind the tool enable.

According to the innovation, this is achieved in the case of an extrusion press part as explained at the beginning by a penetrating press part which is located in Direction achieved on the profile extending transverse bore. So it is, for example, the washer 8, pressure plate 9 or the pressure piece 10 is provided with the bore 14 directed towards the profile axis in such a way that over the resulting channel the tool intended for punching (compressed air cylinder, magnetic hammer, etc.) is introduced and the profile wall is thus close Tool can be pierced. This ensures that the cavity that forms during pressing is immediately and constantly with it Can fill up with air, no longer collapses and thus the scrap content per pressing is significantly reduced.

Claims (1)

_ 3 - RA. 029 357-17.1.68 Claim to protection Extruded part, such as washer, pressure plate or pressure piece, for the production of extruded Holilprofile or pipes, characterized by one penetrating the extrusion part, see in the direction of the profile or the like extending transverse bore (14-).