US3566641A - Plugging device for extrusion container - Google Patents

Plugging device for extrusion container Download PDF

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Publication number
US3566641A
US3566641A US798001A US3566641DA US3566641A US 3566641 A US3566641 A US 3566641A US 798001 A US798001 A US 798001A US 3566641D A US3566641D A US 3566641DA US 3566641 A US3566641 A US 3566641A
Authority
US
United States
Prior art keywords
extrusion
lubricant
plugging block
piston
plugging
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
US798001A
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English (en)
Inventor
Charles Sauve
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.)
Individual
Original Assignee
Individual
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
Priority claimed from FR980629A external-priority patent/FR1417146A/fr
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3566641A publication Critical patent/US3566641A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies

Definitions

  • a device for plugging extrusion containers comprising a die, a cylindrical die cavity containing the billet to be extruded and an extrusion ram associated with a slidable plugging block which is adapted to close off the rear end of the extrusion container as considered in the direction of extrusion.
  • the relative motion of the ram rod and the plugging block causes the lubricant to be injected into the extrusion container under very high pressure, the lubricant being maintained preferably in the plastic state and at a suitable temperature inside an annular feed reservoir which is formed between the ram rod and the plugging block.
  • said annular reservoir communicates through the plugging block with a compression chamber which is filled with lubricant and into which the rod of a piston is adapted to penetrate in leak-tight manner, said piston being in turn intended to carry out a movement of displacement within a separate cylinder under the action of an auxiliary driving fluid.
  • the present invention relates to a plugging device for the rear portion which is located opposite to the die of an extrusion container and through which the extrusion ram is adapted to penetrate.
  • the rear portion of the ram rod which has a larger diametrical cross-section serves to force the lubricant out of its reservoir towards the interior of the extrusion container after the plugging block has been applied against said container, the quantity of lubricant injected being exactly that which is necessary for the purpose of filling under the desired extrusion conditions the space which is left free between the internal wall of said container and the body to be extruded.
  • the ram rod moves with respect to the plugging block over a distance equal to the travel required for the extrusion of the body within the interior of the extrusion container.
  • the volume of lubricant injected is constant and corresponds to the volume swept within the annular feed reservoir by the movement of the ram.
  • this quantity of lubricant which is thus known and according to the method of extrusion adopted, it is possible to carry out either a conventional extrusion operation or extrusion with complete expulsion of the body to be extruded or alternatively an extrusion in which the pressure 3,566,641 Patented Mar. 2, 1971 of lubricant is maintained during the course of the extrusion operation at a variable value which is in fact slightly lower than the extrusion pressure whilst the ram bears continuously on the rear face of said body throughout the extrusion operation.
  • the present invention is directed to an improvement made in the arrangements which are covered by Pat. No. 3,380,270 whereby the volume of lubricant injected into the extrusion container and/or the pressure of said lubricant within the feed reservoir can be varied at will, said variations in volume or in pressure being either continuous or noncontinuous as required, depending on the method of extrusion to be carried out.
  • the improvement under consideration consists primarily in establishing a communication through the plugging block between said annular reservoir and a compression chamber which is filled with lubricant and into which the rod of a piston is adapted to penetrate in leak-tight manner, said piston being in turn intended to carry out a movement of displacement within a separate cylinder under the action of an auxiliary driving fluid.
  • the compression chamber which is directly connected to the annular feed reservoir is thus provided as a function of the position of the piston rod with a variable volume in which the pressure of lubricant can also be continuously adjusted, especially with respect to the pressure of said lubricant within the interior of the extrusion container.
  • the piston is subjected within the separate cylinder to a differential pressure of the auxiliary driving fluid which is exerted on both faces of said piston.
  • the pressure of the lubricant within the annular reservoir can be brought to a value which is higher than or equal to the pressure within the die cavity of the extrusion container.
  • the pressure of lubricant can be continuously variable and determined by a programmer which produces action on the differential pressure of the auxiliary fluid on the piston and which controls the position of said piston within the interior of the separate cylinder.
  • the rod 10 of a ram 11 is mounted within said plugging block 8 and is extended by a portion 12 having a diametrical cross-section which is larger than that of the central portion of the rod so as to form around this latter an annular recess or reservoir 13 which is normally filled with a suitable lubricating material.
  • a portion 12 having a diametrical cross-section which is larger than that of the central portion of the rod so as to form around this latter an annular recess or reservoir 13 which is normally filled with a suitable lubricating material.
  • body 15 or billet which is to be extruded within the container and which is supported by a cradle 16.
  • the annular reservoir 13 is connected through the thickness of the plugging block 8 by way of a duct 17 to a compression chamber 18 which is supplied with lubricant through an isolating valve 19 from an admission pipe 20.
  • the rod 21 of a piston 22 is intended to penetrate into said compression chamber 18.
  • Said piston is fitted in the outer surface thereof with sealing rings 23 and is mounted within the interior of an auxiliary cylinder 24 which is defined by a casing 25.
  • Said casing is closed at the upper end by a flange 26 which is applied against a counter-flange 27 formed at the corresponding end of the plugging block 8, these two components being assembled by means of screws 28.
  • the piston 22 defines two spaces having variable volumes which can be put separately into communication via two pipes 29 and 30 respectively with a source (not shown) of an auxiliary fluid which modifies the position of the piston 22 within said cylinder and consequently controls the extent of penetration of the rod 21 into the compression chamber 18. Seals such as the seal 31 ensure leaktightness between the cylinder 24 which contains the auxiliary fluid and the chamber 18 which is filled with lubricant and which communicates with the annular reservoir 13 via the duct 17.
  • action can be produced on the pressure of the auxiliary fluid which is admitted through the pipes 29 and 30 on each side of the faces of the piston 22 so that these respective pressures follow a program as established by a computer (not shown in the drawings), taking into account the particular parameters which are related to a given extrusion opera- 4 tion as a function, for example, of the travel of the ram within the cylindrical die cavity.
  • a device for plugging an extrusion container comprising a die, a cylindrical die cavity containing the body to be extruded and an extrusion ram associated with a slidable plugging block which is adapted to close off the rear end of said extrusion container relative to the direc T tion of extrusion, wherein the relative motion of the ram rod and the plugging block produces an injection of lubricant under very high pressure into the interior of the extrusion container, said lubricant being maintained especially in the plastic state and at a suitable temperature inside an annular feed reservoir formed between the ram rod on the one hand and the plugging block on the other hand, and wherein said annular reservoir communicates through the plugging block with a compression chamber which is filled with lubricant and into which the rod of a piston is adapted to penetrate in leak-tight manner, said the annular reservoir is brought to a value which is either higher than or equal to the pressure within the die cavity of the extrusion container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Extrusion Of Metal (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Control Of Presses (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US798001A 1964-07-03 1969-02-10 Plugging device for extrusion container Expired - Lifetime US3566641A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR980629A FR1417146A (fr) 1964-07-03 1964-07-03 Système d'obturation pour enceinte de filage
FR140940A FR95026E (fr) 1964-07-03 1968-02-22 Systeme d'obturation pour enceinte de filage.

Publications (1)

Publication Number Publication Date
US3566641A true US3566641A (en) 1971-03-02

Family

ID=8646382

Family Applications (1)

Application Number Title Priority Date Filing Date
US798001A Expired - Lifetime US3566641A (en) 1964-07-03 1969-02-10 Plugging device for extrusion container

Country Status (10)

Country Link
US (1) US3566641A (cs)
AT (1) AT286071B (cs)
BE (1) BE727907A (cs)
DE (1) DE1904556A1 (cs)
ES (1) ES363911A2 (cs)
FR (1) FR95026E (cs)
GB (1) GB1196397A (cs)
IL (1) IL31588A0 (cs)
LU (1) LU57985A1 (cs)
NL (1) NL6902695A (cs)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702555A (en) * 1971-02-25 1972-11-14 Asea Ab Press for hot hydrostatic extrusion
US3702556A (en) * 1970-04-30 1972-11-14 Asea Ab Method of hydrostatic extrusion
US3821888A (en) * 1973-05-14 1974-07-02 Princeton Metal Sys Corp Pre-loading apparatus
US3850016A (en) * 1973-07-30 1974-11-26 Etna Prod Inc Method and apparatus for controlled lubrication during metal drawing
US4426865A (en) 1980-10-30 1984-01-24 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for lubricating tools on metal extrusion presses

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702556A (en) * 1970-04-30 1972-11-14 Asea Ab Method of hydrostatic extrusion
US3702555A (en) * 1971-02-25 1972-11-14 Asea Ab Press for hot hydrostatic extrusion
US3821888A (en) * 1973-05-14 1974-07-02 Princeton Metal Sys Corp Pre-loading apparatus
US3850016A (en) * 1973-07-30 1974-11-26 Etna Prod Inc Method and apparatus for controlled lubrication during metal drawing
US4426865A (en) 1980-10-30 1984-01-24 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for lubricating tools on metal extrusion presses

Also Published As

Publication number Publication date
FR95026E (fr) 1970-03-27
IL31588A0 (en) 1969-04-30
LU57985A1 (cs) 1969-05-22
BE727907A (cs) 1969-07-16
ES363911A2 (es) 1970-12-16
GB1196397A (en) 1970-06-24
DE1904556A1 (de) 1970-08-13
NL6902695A (cs) 1969-08-26
AT286071B (de) 1970-11-25

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