US3786665A - Hot extrusion machine - Google Patents

Hot extrusion machine Download PDF

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Publication number
US3786665A
US3786665A US00226829A US3786665DA US3786665A US 3786665 A US3786665 A US 3786665A US 00226829 A US00226829 A US 00226829A US 3786665D A US3786665D A US 3786665DA US 3786665 A US3786665 A US 3786665A
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United States
Prior art keywords
extrusion
gap
annular
billets
metal
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Expired - Lifetime
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US00226829A
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English (en)
Inventor
R Creuzet
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Individual
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Individual
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    • 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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, rods or tubes
    • B21C23/085—Making tubes

Definitions

  • the machine has an annular extrusion gap, a plurality of containers for receiving billets which are [52] U 5 Cl 72/259 72/269 uniformly angularly spaced about the extrusion gap [5] I B21c 23/00 and grooves or conduits formed.
  • References Cited ciated extrusion pistons exert pressure on the ends of the billets remote from the extrusion gap, the grooves UNITED STATES PATENTS or conduits being delimited by an extrusion needle ar- 2 1 11; llvterrie 72/258 ranged coaxially of the extrusion gap.
  • the invention concerns the manufacture of metal tubes by high temperature extrusion.
  • a metallic mass or billet at a suitable temperature is subjected to a sufficiently high pressure on one of its faces so that the metal flows through an annular gap provided by a die head and a central needle.
  • This bridge is subjected to very large forces which prevents the formation of tubes of a diameter greater than a predetermined value although tubes of a greater diameter are also desirable.
  • the invention obviates this limitation and consists in a machine for producing metal tubes by hot extrusion from a plurality of metal billets having cross-sectional diameters which are not necessarily related to the diameter of the tubes tobe produced and which, in practice, is considerably smaller than that of the tube, said billets being regularly disposed about the axis common to the head and the extrusion needle and subject to the simultaneous action of extrusion pistons on their ends opposite to those facing the annular gap, conduit means being interposed between the flowing ends of the billets and the annular gap where the various flows merge into a single flow corresponding to the tube to be formed by extrusion.
  • FIG. 1 is a schematic view in perspective of a part of a machine according to the invention, certain of the parts having been omitted;
  • FIG. 2 is a partial front view
  • FIG. 3 is a sectional view'along line 3-3 of FIG. 2;
  • FIG. 4 is a sectional view along line 4-4 of FIG. 2.
  • extrusion pistons 14,-14 bear against the rear faces 15,45 of the billets and may be urged forwardly responsive to corresponding displacements of one or more hydraulic jacks (not shown).
  • the forward orifices 16,-16 of the cups or containers are closed off by a rim 21 (FIGS. 2-4) of a ring or disc 22 coaxial with the group of the containers 12,42 and one or more conduits or grooves facing each container 12 (two in number in the illustrated embodiment) 23a, 23b extend from the rim 21 and are joined at their other ends to a collar 24 provided on disc 22 thereby defining with the extrusion needle 25 an annular gap 26 of a progressively diminishing section from rear to front.
  • the extrusion needle 25 is advantageously displaceably mounted, for example by threads 27 on the body 28 where the cups 12 are arranged. Therefore by changing the needle different extrusion gap heights may be obtained.
  • the collar 24, in longitudinal section, has at its portion 29 a relatively slight'slope and then towards its forward edge at 30 a more accentuated slope until it reaches the cylindrical surface 31 forming the extrusion gap 33 per se with the cylindrical outer surface 32 of the needle 25.
  • the metal of the billets flows in the grooves 23 towards the axis 11, fills the gap 26 of diminishing section and then flows through the extrusion gap 33 as shown by the shaded portion, the pressure of the metal flowing in the said gap being sufficiently great to have the edges of the partial flows coming from the various containers or cups join in a continuous manner so that the metal flows through the extrusion gap 33 is effected under the same conditions as during hot extrusion starting with a single billet.
  • the apparatus is, however, free of bridges provided in known apparatus for spreading metal coming from a single billet disposed coaxially of the extrusion gap which the metal deflects towards the entrance to the said gap along one or more passages.
  • a hot extrusion machine for producing metal tubes comprising an annular extrusion gap, a plurality of containers for receiving billets regularly angularly spaced about the annular gap, and means for channeling the flow of metal from the billets towards the annular gap as an extrusion pressure is exerted on the ends of the billets remote from the annular gap, the channeling means comprising conduits converging towards the extrusion gap, a plurality of such conduits being provided between any one of the container and the annular gap.
  • conduits have progressively diminishing cross sections towards the extrusion gap.
  • conduits are formed in a single annular plate.
  • conduits are delimited by a central extrusion needle.
  • An apparatus for the extrusion of a metal tube comprising a plurality of cylinders having parallel axes; and angularly equispaced about a central axis; a respective piston received in one end of each of said cylinders for driving a billet of metal within the cylinder and individual thereto in the direction of its other end; a needle disposed along said central axis at said other ends of said cylinders; an annular die surrounding said needle and coaxial therewith to define an annular passage through which metal of said billets is extruded to form the tube; and at least one channel communicating between each cylinder at its other end and said passage and incline to a plane perpendicular to said axis and to direction of said passage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
US00226829A 1971-03-26 1972-02-16 Hot extrusion machine Expired - Lifetime US3786665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717110820A FR2130019B1 (enrdf_load_stackoverflow) 1971-03-26 1971-03-26

Publications (1)

Publication Number Publication Date
US3786665A true US3786665A (en) 1974-01-22

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ID=9074223

Family Applications (1)

Application Number Title Priority Date Filing Date
US00226829A Expired - Lifetime US3786665A (en) 1971-03-26 1972-02-16 Hot extrusion machine

Country Status (8)

Country Link
US (1) US3786665A (enrdf_load_stackoverflow)
JP (1) JPS5148141B1 (enrdf_load_stackoverflow)
CA (1) CA963843A (enrdf_load_stackoverflow)
DE (1) DE2214780A1 (enrdf_load_stackoverflow)
FR (1) FR2130019B1 (enrdf_load_stackoverflow)
GB (1) GB1387155A (enrdf_load_stackoverflow)
IT (1) IT947588B (enrdf_load_stackoverflow)
SE (1) SE384147B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332156A (en) * 1978-09-28 1982-06-01 B. V. Koninklijke Maatschappij "De Schelde" Method for the manufacture of pipes by means of extrusion as well as for providing one flange on at least two pipes, and device to carry out the said method
DE3402300A1 (de) * 1984-01-24 1985-08-01 Aluminium-Walzwerke Singen Gmbh, 7700 Singen Verfahren und vorrichtung zum herstellen eines profils, insbesondere eines hohlprofils, auf dem wege des strangpressens
DE10196332B4 (de) * 2000-06-10 2006-03-16 Intai Jin Fertigungsvorrichtung für ein gekrümmtes Metallrohr mit einem beliebig geformten Querschnitt und Verfahren zur Herstellung eines gekrümmten Metallrohres und einer gekrümmten Metallstange
WO2008073473A1 (en) * 2006-12-11 2008-06-19 Ohio University Apparatus and method for extruding micro-channel tubes
PL426210A1 (pl) * 2018-07-04 2019-05-06 Bialczak Urszula Narzedziownia Bialczak Spolka Cywilna Zdzislaw Bialczak I Urszula Bialczak System matrycy wieloelementowej, matryca do wytłaczania dużego i skomplikowanego elementu i sposób wytwarzania matrycy

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US89326A (en) * 1869-04-27 Improvement in machines for making tin-lined lead pipe
US2221299A (en) * 1939-06-28 1940-11-12 Aluminum Co Of America Extrusion apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US89326A (en) * 1869-04-27 Improvement in machines for making tin-lined lead pipe
US2221299A (en) * 1939-06-28 1940-11-12 Aluminum Co Of America Extrusion apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332156A (en) * 1978-09-28 1982-06-01 B. V. Koninklijke Maatschappij "De Schelde" Method for the manufacture of pipes by means of extrusion as well as for providing one flange on at least two pipes, and device to carry out the said method
DE3402300A1 (de) * 1984-01-24 1985-08-01 Aluminium-Walzwerke Singen Gmbh, 7700 Singen Verfahren und vorrichtung zum herstellen eines profils, insbesondere eines hohlprofils, auf dem wege des strangpressens
US4703642A (en) * 1984-01-24 1987-11-03 Swiss Aluminium Ltd. Process and device for manufacturing a section, in particular a hollow section, via extrusion
DE10196332B4 (de) * 2000-06-10 2006-03-16 Intai Jin Fertigungsvorrichtung für ein gekrümmtes Metallrohr mit einem beliebig geformten Querschnitt und Verfahren zur Herstellung eines gekrümmten Metallrohres und einer gekrümmten Metallstange
WO2008073473A1 (en) * 2006-12-11 2008-06-19 Ohio University Apparatus and method for extruding micro-channel tubes
US20100064756A1 (en) * 2006-12-11 2010-03-18 Ohio University Micro-channel tubes and apparatus and method for forming micro-channel tubes
US8191393B2 (en) * 2006-12-11 2012-06-05 Ohio University Micro-channel tubes and apparatus and method for forming micro-channel tubes
PL426210A1 (pl) * 2018-07-04 2019-05-06 Bialczak Urszula Narzedziownia Bialczak Spolka Cywilna Zdzislaw Bialczak I Urszula Bialczak System matrycy wieloelementowej, matryca do wytłaczania dużego i skomplikowanego elementu i sposób wytwarzania matrycy
PL233207B1 (pl) * 2018-07-04 2019-09-30 Bialczak Urszula Narzedziownia Bialczak Spolka Cywilna Zdzislaw Bialczak I Urszula Bialczak System matrycy wieloelementowej, matryca do wytłaczania dużego i skomplikowanego elementu i sposób wytwarzania matrycy

Also Published As

Publication number Publication date
IT947588B (it) 1973-05-30
SE384147B (sv) 1976-04-26
FR2130019A1 (enrdf_load_stackoverflow) 1972-11-03
GB1387155A (en) 1975-03-12
FR2130019B1 (enrdf_load_stackoverflow) 1974-02-22
CA963843A (en) 1975-03-04
DE2214780A1 (enrdf_load_stackoverflow) 1972-10-12
JPS5148141B1 (enrdf_load_stackoverflow) 1976-12-18

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