US3727448A - Indirect extrusion - Google Patents

Indirect extrusion Download PDF

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Publication number
US3727448A
US3727448A US00108132A US3727448DA US3727448A US 3727448 A US3727448 A US 3727448A US 00108132 A US00108132 A US 00108132A US 3727448D A US3727448D A US 3727448DA US 3727448 A US3727448 A US 3727448A
Authority
US
United States
Prior art keywords
container
billet
gag
billet material
die
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00108132A
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English (en)
Inventor
A Mann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Aluminum Co Inc
Original Assignee
Texas Aluminum Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Texas Aluminum Co Inc filed Critical Texas Aluminum Co Inc
Application granted granted Critical
Publication of US3727448A publication Critical patent/US3727448A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/218—Indirect extrusion presses

Definitions

  • ABSTRACT An improved gag member for an indirect extrusion apparatus wherein a billet material is held within an open ended container with a die at one end of the container and the gag member at the other end; the gag member being used to move the container over the die and the billet material through the die.
  • the improved gag member has a front face engaging the end of the container; and a cavity is formed in the front face in alignment with the bore of the container. In an extrusion operation, billet material is held in the cavity of the gag member and the entire amount of material held in the container is extruded through the die member.
  • billet material is extruded through a die means held in a die assembly positioned at one end of the container into which the billet material is loaded.
  • the container is an open ended container and a gag means is provided at the'end remote from the die means for closing the bore of the container.
  • This gag means is typically mounted on the end of a hydraulically actuated ram and is used to telescope the container over the die assembly and the billet material held therein is, thus,'
  • the entire billet held in the container is not extruded. Instead, the extrusion process is stopped before the die means reaches the gag member. This is done so as to prevent damage to the die means which might otherwise occur if the extrusion were to continue until the gag means struck the die means.
  • the billet is not completely extruded because the flow pattern of the material in the billet changes drastically as the final amount of material is extruded. More particularly, during extrusion of a billet of material, the material immediately behind the die flows. This flow results from material around the edges of the billet being forced toward the openings in the center of the die means. Generally, the flow pattern which is produced extends backwardly into the billet material for only a short distance.
  • the indirect extrusion apparatus and, in particular the gag means thereof has been modified in construction so as to eliminate'the production of the butt after each extrusion operation.
  • the'gag means is provided with a cavity aligned with the bore of the container. This cavity is adapted to receive billet material and is of sufficient shape to absorb the normal flow of billet material so that the entire material held in the container may be extruded. After an extrusion operation, it is simply necessary to retract the gag means with the billet held therein. The extruded product may then be severed from the material held in the gag means and the container reloaded for another extrusion operation.
  • FIG. 1 is a side elevation of the indirect extrusion press of the present invention
  • FIG. 2 is an enlarged cross-sectional view of the improved gag means of the present invention.
  • FIG. 3 is a side elevation of an alternative embodiment of the gag means of the present invention.
  • the indirect extrusion apparatus includes die assembly 1, a container 2 for holding a billet of material in alignment with the die assembly and gag means 3 for moving the container over the container and the billet material therethrough. Except for the gag means 3, the construction of the press shown in FIG. 1 may be the same as the press disclosed in applicants copending application, Ser. No. 89,841, filed Nov. 16,, 1970.
  • the die assembly 1 is mounted at one end'to a platen 4 and at its other end holds a die means 1 through which the billet material is to be extruded.
  • the container 2 is mounted for reciprocal movement on suitable guide structure 5 and has a bore 6 in which the billet of material to be extruded is loaded.
  • the bore is axially aligned with the die assembly so that the container may be telescoped over the die assembly during an extrusion operation.
  • the gag means in the form of a gag block 3' engages against the end of the container remote from the die assembly and die means and is mounted on the end of a hydraulically actuated ram 7.
  • a cutting device 8 At the end of the container remote from the die assembly there is positioned a cutting device 8 having a cutting blade 9 adapted to be moved across the bore of the container for severing the extruded product as more fully described below.
  • suitable heating means 10 are provided for heating the container and thus the billet material to be extruded.
  • the gag block 3' has a cavity 11 in its front surface facing and in alignment with the bore 6 of the container.
  • the cavity has a cross-sectional shape and size equal to the bottom surface of the cavity.
  • the gag means is insulated and heating means 12 are provided so that the temperature of the material in the gag structure may be maintained generally at the same level as the temperature of the material in the container.
  • a billet of material is first loaded into the container 2.
  • the hydraulic ram is then actuated to move the gag block 3' over the aligned bore 6 of the container and into contact therewith.
  • the container with the billet is then forced forwardly toward the die assembly to bring the die means 1' into contact with the billet.
  • the billet is first moved partially out of the end of the container remote from the die assembly and into the cavity 11 of the gag block. Due to the engagement of the gag block with the container and the alignment of the cavity 1 l with the bore of the container, the material moved into the cavity is confined. Continued movement of the container over the die assembly effects extrusion of the billet material through the die means 1'.
  • the pressure created during this extrusion and, in particular, during extrusion of the final portion of the billet material held in the container causes the material held within the cavity 11 to flow tightly into engagement against the cavity walls.
  • the material in the cavity will be held therein by frictional engagement of the walls with the cavity.
  • the die means 1' will be generally aligned with the end of the container adjacent the gag means and may even be oriented slightly in the cavity 11.
  • the gag means is then retracted; and due to the billet materialbeing held in the cavity, the extruded product is drawn backwardly through the die means 1'. Retraction is continued until enough room is provided for actuation of the cutting blade 9 which may then be operated to sever the extruded product fromthe billet material held in the gag means. In extrusion operations, it is not necessary to perform this separate cutting operation.
  • the mere retraction of the gag means with the billet material held therein will cause the billet material to be severed from the extruded product.
  • the frictional hold of the die means on the extruded product will be enough to hold product duringretraction of the gag means and cause it to break away from the billet material in the gag means.
  • the severed product is removed from the die assembly and the container reloaded with a new billet of material.
  • Each subsequent extrusion will effectively extrude an entire billet length of material while the cavity 11 will generally remain filled, with the billet material therein from the previous extrusion operations being replaced by new materials to the extent caused by the flow of the new materials intothe cavity.
  • FIG. 2 shows an alternative embodiment of the present invention in which the cutting device 8 has been eliminated.
  • the gag means 3 is mounted on the end of the ram for movement transversely of the axis of extrusion.
  • suitable hydraulic means 13 is provided.
  • the extruded product may be severed from the billet material remaining in the gag block by simply actuating the hydraulic means 13 to move the gag block transversely of the container. This produces a shearing of the productfrom the remaining billet material.
  • the press is used for extruding light metals such as aluminum, magnesium and so forth. It may also be used, however, for extruding other metals and materials. Also, the shape and depth of the cavity in the gag block and/or the temperature of the material held thereby may be varied to produce different flow patterns as found to be desirable when extruding different metals and shapes.
  • said gag means has a cavity formed in said surface facing and aligned with the remote end of said container for receiving billet material, said cavity being disposed beyond'the remote end of said container.
  • said gag means has a cavity therein facing and aligned with the remote end of said container for receiving billet material;
  • the cavity in said gag means has a cross-sectional size as great as that of the bore through said container.
  • the cavity in said gag means has a depth equal to the length of the butt that would normally be required if the gag had no cavity therein.
  • said gag means has a cavity therein facing and aligned with the remote end of said container for receiving billet material;
  • the cavity in said gag means has a depth sufficient to absorb the flow of billet material occurring on the one side of said die means during the extruding of all of the billet material within the container without interfering pressure reaction from the bottom surface of said cavity aligned with the bore of the container.
  • the cavity in said gag means has a cross-sectional shape generally corresponding to that of the bore through said container.
  • heating means for heating the container and gag means to heat the billet material therein to substantially equal temperatures.
  • gag means a. means for shifting said gag means transversely of the axis of extrusion after extrusion of said material from the container to shear the billet material in the gag means from the extruded product.
  • cor- 10 includend of the container billet end of the container away from the container after extrusion of the billet material held in the container;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
US00108132A 1971-01-20 1971-01-20 Indirect extrusion Expired - Lifetime US3727448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10813271A 1971-01-20 1971-01-20

Publications (1)

Publication Number Publication Date
US3727448A true US3727448A (en) 1973-04-17

Family

ID=22320500

Family Applications (1)

Application Number Title Priority Date Filing Date
US00108132A Expired - Lifetime US3727448A (en) 1971-01-20 1971-01-20 Indirect extrusion

Country Status (8)

Country Link
US (1) US3727448A (cg-RX-API-DMAC10.html)
JP (1) JPS5141866B1 (cg-RX-API-DMAC10.html)
BE (1) BE797009Q (cg-RX-API-DMAC10.html)
CA (1) CA954069A (cg-RX-API-DMAC10.html)
DE (1) DE2202151C2 (cg-RX-API-DMAC10.html)
FR (1) FR2122853A5 (cg-RX-API-DMAC10.html)
GB (1) GB1379757A (cg-RX-API-DMAC10.html)
IT (1) IT942922B (cg-RX-API-DMAC10.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977226A (en) * 1975-03-24 1976-08-31 Texas Extrusion Corporation Sealing device for indirect extrusion die
DE2739904A1 (de) * 1977-09-05 1979-03-15 Schloemann Siemag Ag Indirekt-metallstrang- und rohrpresse zum isothermen pressen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2316939C3 (de) * 1973-04-04 1987-09-10 Siemens AG, 1000 Berlin und 8000 München Elektrische Hörhilfeschaltung
DE2509490C3 (de) * 1975-03-05 1980-10-02 Schloemann-Siemag Ag, 4000 Duesseldorf Verschlußstück an einer Indirekt-Metallstrangpresse für Leicht- und Schwermetall
DE3110105A1 (de) * 1981-03-16 1982-10-14 SMS Schloemann-Siemag AG, 4000 Düsseldorf Arbeitsverfahren bei indirekt-metallstrangpressen nach dem pressvorgang zum strippen des blockaufnehmers, zum abscheren des pressrestes u. zum ausziehen bzw. ausstossen des pressgutes sowie anordnungen zur durchfuehrung des arbeitsverfahrens

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1661594A (en) * 1925-07-17 1928-03-06 Krupp Ag Grusonwerk Extrusion press
US2097502A (en) * 1933-03-18 1937-11-02 Union Carbide & Carbon Corp Method of and apparatus for producing rods and the like of comminuted material
US2858017A (en) * 1954-04-05 1958-10-28 Baldwin Lima Hamilton Corp Die shifting and extrusion cutting slide
US3018885A (en) * 1958-05-02 1962-01-30 Aluminum Co Of America Extrusion and stretch-straightening apparatus and method
US3369384A (en) * 1965-07-07 1968-02-20 Reynolds Metals Co Metal extrusion
US3563079A (en) * 1968-11-21 1971-02-16 Reynolds Metals Co Indirect extrusion with skull skimming

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE450032C (de) * 1926-08-15 1927-09-29 Hirsch Kupfer Und Messingwerke Strangpresse
GB435402A (en) * 1934-03-17 1935-09-17 Otto Busse An improved metal extrusion process
US2539564A (en) * 1947-03-31 1951-01-30 Detroit Gasket & Mfg Company Process of extrusion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1661594A (en) * 1925-07-17 1928-03-06 Krupp Ag Grusonwerk Extrusion press
US2097502A (en) * 1933-03-18 1937-11-02 Union Carbide & Carbon Corp Method of and apparatus for producing rods and the like of comminuted material
US2858017A (en) * 1954-04-05 1958-10-28 Baldwin Lima Hamilton Corp Die shifting and extrusion cutting slide
US3018885A (en) * 1958-05-02 1962-01-30 Aluminum Co Of America Extrusion and stretch-straightening apparatus and method
US3369384A (en) * 1965-07-07 1968-02-20 Reynolds Metals Co Metal extrusion
US3563079A (en) * 1968-11-21 1971-02-16 Reynolds Metals Co Indirect extrusion with skull skimming

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977226A (en) * 1975-03-24 1976-08-31 Texas Extrusion Corporation Sealing device for indirect extrusion die
DE2739904A1 (de) * 1977-09-05 1979-03-15 Schloemann Siemag Ag Indirekt-metallstrang- und rohrpresse zum isothermen pressen

Also Published As

Publication number Publication date
JPS5141866B1 (cg-RX-API-DMAC10.html) 1976-11-12
DE2202151A1 (de) 1972-07-27
GB1379757A (en) 1975-01-08
AU3598671A (en) 1973-05-31
DE2202151C2 (de) 1982-04-22
FR2122853A5 (cg-RX-API-DMAC10.html) 1972-09-01
BE797009Q (fr) 1973-07-16
IT942922B (it) 1973-04-02
CA954069A (en) 1974-09-03

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