US3875781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Press for producing closed-bottomed articles
Assignee: SMS Siemag AG
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Filing: 1974-05-03
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Granted: 1975-04-08
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Expires: 1994-05-03
Abstract
Abstract In hydraulic presses for producing closed-bottomed articles by the back-flow extrusion process, there are problems in precisely predetermining the thickness of the bottom of the article. We have a front end portion of the ram of U-shape as seen looking at right angles to the press axis and defining two stop members which project forward at the forward end of the ram, the workpiece holder having adjustable abutments for the stop members. For billet loading and pressed article removal, means are provided for feeding billets to the press axis generally at right angles to the press axis, removing pressed articles from the press axis generally at right angles to the press axis and, between the ram and the billet container, for receiving billets fed by the billet feed means.
Inventors
- 👤 Franz Josef Zilges
- 👤 Heinrich Kutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:16
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/21; B21C23/218; B21C33/00; B21C35/00; B21C35/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
423 words
A hydraulic press for producing closed-bottom articles by the back-flow extrusion process, the press comprising: press bed means; press ram mounting means mounted on said press bed means; workpiece holding means spaced along the press axis from said press ram mounting means and mounted on said press bed means; press column means connecting said press ram means to said workpiece holding means; movable press ram means mounted by said press ram mounting means; extrusion punch means mounted on said press ram means, for movement along said press axis and back-flow extrusion of said articles; main hydraulic piston-cylinder means mounted by said press ram mounting means, for actuating said press ram; double-acting piston-cylinder means mounted by said press ram mounting means, for bringing said extrusion punch means up to a pressing position and withdrawing said extrusion punch means after pressing; billet container holder means mounted by said workpiece holding means; billet container means held by said billet container holding means, for receiving a billet to be pressed and holding said billet while it is extruded by entry of said extrusion punch means into said billet container means; end piece means closing a rear end of said billet container means; two stop members mounted on said ram means and projecting forward at the forward end portion of said ram means, said stop members being disposed on either side of said press axis whereby the forward end of said ram means is generally U-shaped as seen looking at right angles to said press axis; abutment means fixed with respect to said workpiece holding means for abutment by said stop members at the end of the forward stroke of said press ram means, thereby limiting said forward stroke; adjusting means for adjusting the axial position of said abutment means, thereby adjusting the end position of said forward stroke; billet loading means mounted on said billet container means and between said billet container means and said ram means and spaced from said press axis, for supporting a said billet prior to insertion of said billet into said billet container means; billet feeding means for feeding billets to said billet loading means in a direction generally at right angles to said press axis; stripping means for stripping a pressed article from said extrusion punch means after pressing; and removal means for removing a said pressed article from said press axis generally at right angles to said press axis, after extraction of said pressed article from said billet container means and stripping said pressed article off said extrusion punch means.
Claim 2
Dependent Claim
423 words
A hydraulic press for producing closed-bottom articles by the back-flow extrusion process, the press comprising: press bed means; press ram mounting means mounted on said press bed means; workpiece holding means spaced along the press axis from said press ram mounting means and mounted on said press bed means; press column means connecting said press ram means to said workpiece holding means; movable press ram means mounted by said press ram mounting means; extrusion punch means mounted on said press ram means, for movement along said press axis and back-flow extrusion of said articles; main hydraulic piston-cylinder means mounted by said press ram mounting means, for actuating said press ram; double-acting piston-cylinder means mounted by said press ram mounting means, for bringing said extrusion punch means up to a pressing position and withdrawing said extrusion punch means after pressing; billet container holder means mounted by said workpiece holding means; billet container means held by said billet container holding means, for receiving a billet to be pressed and holding said billet while it is extruded by entry of said extrusion punch means into said billet container means; end piece means closing a rear end of said billet container means; two stop members mounted on said ram means and projecting forward at the forward end portion of said ram means, said stop members being disposed on either side of said press axis whereby the forward end of said ram means is generally U-shaped as seen looking at right angles to said press axis; abutment means fixed with respect to said workpiece holding means for abutment by said stop members at the end of the forward stroke of said press ram means, thereby limiting said forward stroke; adjusting means for adjusting the axial position of said abutment means, thereby adjusting the end position of said forward stroke; billet loading means mounted on said billet container means and between said billet container means and said ram means and spaced from said press axis, for supporting a said billet prior to insertion of said billet into said billet container means; billet feeding means for feeding billets to said billet loading means in a direction generally at right angles to said press axis; stripping means for stripping a pressed article from said extrusion punch means after pressing; and removal means for removing a said pressed article from said press axis generally at right angles to said press axis, after extraction of said pressed article from said billet container means and stripping said pressed article off said extrusion punch means.
Claim 3
Dependent Claim
61 words
The press of claim 1, wherein said workpiece holding means has at least three slots defined on that end face thereof which faces said ram means, which slots, as seen looking along said press axis, are radial to said press axis, said container holder means having registering, facing slots, and keys being provided each engaging in two respective registering said slots.
Claim 4
Dependent Claim
24 words
The press of claim 1, wherein said abutment means are on that end face of said container holder means which faces said ram means.
Claim 5
Dependent Claim
27 words
The press of claim 1, wherein one said stop member is above said press axis and the other said said stop member is below said press axis.
Claim 6
Dependent Claim
72 words
The press of claim 1, wherein said adjusting means comprises movable wedge means associated with said abutment means, cooperating fixed wedge means, means for moving said movable wedge means transversely to said press axis, thereby to adjust said axial position of said abutment means, gear means interconnecting said moving means and a single actuating means connected to said gear means, whereby adjustment of said single actuating means adjusts said adjusting means simultaneously.
Claim 7
Dependent Claim
17 words
The press of claim 1, wherein said billet loading means acts as part of said removal means.
Claim 8
Dependent Claim
54 words
The press of claim 1, and being a horizontal press, wherein said removal means comprises a pivoted dish and means mounting said pivoted dish for pivoting movement about an axis parallel to, but spaced to one side of, said press axis, from a receiving position below said press axis to an article removal position.
Claim 9
Dependent Claim
62 words
The press of claim 7, wherein said pivoted dish mounting means comprises a two-armed lever said pivoted dish being mounted on one arm of said lever, the other arm of said lever carrying an abutment, and wherein said removal means comprises an actuating member for abutting said abutment to move said pivoted dish from said receiving position to said article removal position.
Claim 10
Dependent Claim
74 words
The press of claim 7, wherein when said pivoted dish is in said article removal position, said pressed article will roll off the pivoted dish, and when said removal means comprises a movable discharge dish for receiving said pressed article as it rolls off said pivoted dish, and means for moving said discharge dish in a direction generally at right angles to said press axis for transporting said pressed article out of said press.
Claim 11
Dependent Claim
60 words
The press of claim 9, wherein said removal means comprises an actuating member fixed with respect to said discharge dish, for pivoting said pivoted dish when said discharge dish is moved towards said press axis and into the position of said discharge dish in which said discharge dish receives said pressed article, said discharge dish being above said actuating member.
Claim 12
Dependent Claim
17 words
The press of claim 7, and comprising means for lowering said pivoted dish below said receiving position.
Claim 13
Dependent Claim
57 words
The press of claim 11, wherein said lowering means comprises a hydraulic piston-cylinder unit comprising piston means and cylinder means and adjustable means for limiting the length of stroke of said unit, and thereby defining the height of said receiving position, said adjustable means being provided between said pivoted dish and said cylinder means of said unit.
Claim 14
Dependent Claim
26 words
The press of claim 1, wherein said billet loading means is mounted on that end face of said billet container means which faces said ram means.
Claim 15
Dependent Claim
115 words
The press of claim 1, and comprising billet container push-out and pull-in means mounted on said workpiece holding means for acting along said press axis for pushing a first said billet container means out of said container holder means and towards said ram means and for pulling a second said billet container means into said container holder means, and billet container support and guide means which is movable into a billet container means receiving position adjacent said lower part of said container holder means, for supporting and guiding the removal of said first billet container means from said container holder means and the insertion of said second billet container means into said container holder means.
Claim 16
Dependent Claim
45 words
The press of claim 14, and being a horizontal press, wherein said push-out and pull-in means comprises a double-acting hydraulic piston-cylinder unit, and said support and guide means is pivoted on said press bed means, for swinging up into said billet container means receiving position.
References Cited (Backward Citations)
US3431765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |