Metal deforming – By extruding through orifice – With cutting
Reexamination Certificate
2000-03-13
2001-10-23
Tolan, Ed (Department: 3725)
Metal deforming
By extruding through orifice
With cutting
Reexamination Certificate
active
06305207
ABSTRACT:
FIELD OF THE INVENTION
For shell-type extrusion of metals the ram disk or die ends up after an extrusion operation with residue on one end of the ram disk or die and with a shell connected to the residue and partly or wholly covering the ram disk or die according to the type of operation and the tool type, the shell collecting in an annular chamber on the outer edge of the ram disk or die or being compacted in a separate working step on the rear face of the ram disk or die opposite the residue. In order to reuse the ram disk or die the residue and shell must be removed.
BACKGROUND OF THE INVENTION
The removal of the pressing residue and if necessary of the shell compacted behind the ram disk or die is done by a blade run along the rear face of the ram disk or die and if necessary a second blade run along the opposite face carrying the compacted shell. The first blade forms together with the second blade or with a guide plate a frame in which the blade(s) and the guide plate have a spacing corresponding to an axial dimension of the ram disk or die and through which the ram disk or die is moved parallel to its end faces so that in this manner the residues (pressing residue and compacted shell) or the pressing residue on one end face are sheared off.
The shell portion surrounding the periphery of the ram disk or die or the shell crumpled into the annular chamber is cut by one or two groove blades mounted laterally in the frame of the press-residue separator so that the shell is scraped out by the groove blades and is pushed off the ram disk or die (DE 2,506,447 and DE 2,613,241).
Instead of fixed groove blades according to European 0,224,115 pivotally mounted groove blades are known which are advanced into the ram disk or die to scrape along its periphery and separate the shell.
OBJECTS OF THE INVENTION
It is an object of the invention to remove the shell from the ram disk or die more surely.
SUMMARY OF THE INVENTION
This object is attained by radially spreading the shell to be removed by roller pressure while rotating the ram disk or die whose end faces have been freed of residue (pressing residue and compacted shell) and rotating the roller or rollers braced radially against it and subsequently axially stripping the sufficiently spread shell.
The apparatus for carrying out the method is a frame formed of two blades or one blade and a guide plate at a spacing equal to the axial dimension of the ram disk or die, a press-residue remover comprised of a slide moving the ram disk or die parallel to the blade or blade according to a further feature of the invention, a spreading device provided with rotatably driven rollers radially displaceable against the ram disk or die and forming a central rotatable holder for the ram disk or die and for separate removal of the ram disk or die and the shell.
A preferred embodiment of the spreading device has three movable rollers. It is preferable here that the holder for a ram disk or die and the roller or rollers are arranged in a horizontal plane with vertical rotation axes.
REFERENCES:
patent: 3373592 (1968-03-01), Robra et al.
patent: 4043163 (1977-08-01), Raab
patent: 4048832 (1977-09-01), Raab et al.
patent: 4745789 (1988-05-01), Richardt et al.
patent: 4750345 (1988-06-01), Groos et al.
patent: 25 06 447 (1976-08-01), None
patent: 25 05 160 A1 (1976-08-01), None
patent: 26 13 241 A1 (1977-10-01), None
patent: 0 224 115 B1 (1991-04-01), None
patent: 55-128317 (1980-10-01), None
Dubno Herbert
SMS Eumuco GmbH
Tolan Ed
Wilford Andrew
LandOfFree
Removing shell and press residue from a metal-extruding ram... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Removing shell and press residue from a metal-extruding ram..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removing shell and press residue from a metal-extruding ram... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2603564