EP0099744A2 - Strangpressmaschine - Google Patents

Strangpressmaschine Download PDF

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Publication number
EP0099744A2
EP0099744A2 EP83304146A EP83304146A EP0099744A2 EP 0099744 A2 EP0099744 A2 EP 0099744A2 EP 83304146 A EP83304146 A EP 83304146A EP 83304146 A EP83304146 A EP 83304146A EP 0099744 A2 EP0099744 A2 EP 0099744A2
Authority
EP
European Patent Office
Prior art keywords
wheel
ducts
members
hub
cheek
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.)
Withdrawn
Application number
EP83304146A
Other languages
English (en)
French (fr)
Other versions
EP0099744A3 (de
Inventor
Norman Reginald Fairey
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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 BICC PLC filed Critical BICC PLC
Publication of EP0099744A2 publication Critical patent/EP0099744A2/de
Publication of EP0099744A3 publication Critical patent/EP0099744A3/de
Withdrawn legal-status Critical Current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
    • B21C23/005—Continuous extrusion starting from solid state material
    • 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
    • B21C29/00—Cooling or heating extruded work or parts of the extrusion press

Definitions

  • This invention relates to machinery for continuous friction-effected extrusion, primarily but not exclusively of metal. More particularly it relates to machinery of the kind in which a passageway is formed between an arcuate first member and a second member in the form of a wheel having a circumferential groove formed in its peripheral surface into which groove the first member projects, the wheel being rotatable to urge material in the passageway towards one end (the exit end) thereof, an abutment member extending across the passageway at the exit end thereof and at least one die orifice through the abutment member or through an adjacent part of the arcuate first member.
  • the abutment member may be large enough to block the end of the passageway completely (as described in the specification of UK Patent 1370894) but especially when the material to be extruded is a relatively hard metal, such as copper, we prefer that the abutment member is of substantially smaller cross-section than the passageway and leaves a substantial gap between the abutment member and the groove surface and that the material being extruded is allowed to adhere to the groove surface, whereby a substantial proportion of the metal (as distinct from the inevitable leakage of flash through a working clearance) extends through the clearance and remains as a lining in the groove to re-enter the passageway while the remainder of the metal extrudes through the die orifice(s), as described in our UK Patent No. 2069389B.
  • Conform machinery Such machinery is commonly known as “Conform” machinery, and will be referred to as such hereinafter.
  • the wheel of Conform machinery is subject to very high, and cyclic, stresses and is liable to premature failure though fatigue cracking, which adversely affects the operation of the machinery through high down-time and considerable replacement cost.
  • the fatigue cracking problem has led to the adoption, in place of a monolithic wheel construction, of a wheel comprising two cheek members and a central hub which forms the base of the passageway.
  • the cheek members have usually formed the sidewalls of the passageway, but it has been suggested the sidewalls of the wheel groove should be formed by separate rings; we have experimented with such arrangements and found it desirable to provide slip surfaces between the cheek members and the rings which are generally parallel to the sidewalls and spaced from them a distance not less than half nor more than twice the width of the wheel groove, subject to a minimum distance of 3 mm.
  • the walls of these coolant ducts are at considerably lower temperatures than the remainder of the respective wheel member in which the ducts are formed, so producing stress concentrations around the ducts that frequently lead to cracking and catastrophic failure of the wheel.
  • the present invention substantially reduces this effect and so enhances average wheel life.
  • the coolant ducts through the cheek members at least (and preferably through the hub also when applicable) are lined with thermally insulating material so that cooling is concentrated at the surfaces of the annular passageways between the parts.
  • any adequately heat- and fluid-resistant thermally insulating material can be used, but we prefer a heat-resistant plastics material such as PTFE (polytetrafluoroethylene).
  • PTFE polytetrafluoroethylene
  • a pre-formed sleeve it is preferably flanged at the upstream end to secure it against movement in the direction of coolant flow.
  • Figures 1 and 2 are cross-sections through the significant components of the wheel of a Conform machine in accordance with the invention at two places spaced round the circumference of the wheel by 45°; and Figure 3 is a diagram illustrating the distribution of coolant flow through the wheel.
  • the wheel comprises two cheek members 1, a hub 2 and a pair of rings 3.
  • the rings 3 and the hub 2 bound the working groove 4 and all these members are exposed to a pair of annular coolant passages 5.
  • Entry and exit ducts 6, 8 through the cheek members and transfer ducts 7 through the hub provide for through flow of fluid and, in accordance with the invention, these ducts 6, 7, 8 are lined with PTFE tubes 9 which have flanges 10 at the end at which coolant is to enter them.
  • the coolant enters from the wheel member 11 in a conventional manner and passes through any one of the inlet ducts 6 in the right hand cheek member 6 which conveys it to the first (right hand) annular passage 5.
  • the flow divides to pass in both directions around the annular passageway 5.
  • the flow encounters oppositely-flowing coolant which entered at the next of the inlet ducts 6, mixes with it, and flows through the duct 7 to the second (left hand) annular passageway.
  • the mixed flow divides again, flowing in both directions around the passageway to leave by the exit ducts 8 which are aligned with the entry ducts 6 through which it first came.
  • 1-1 and II-II each indicate one of the four equivalent positions corresponding to Figures 1 and 2 respectively).
  • a Conform machine had a wheel of the design shown in Figures 1 and 2 with a circumference of one metre and a groove substantially nine millimetres square.
  • the coolant ducts (6, 7, 8) were 8 mm in diameter, and the PTFE sleeves 10 had an internal diameter of 6 mm and a wall thickness of 1 mm, so as to fit the ducts without nominal clearance.
  • the flanges 10 were 2 mm thick and had an outside diameter of 10 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Braking Arrangements (AREA)
  • Extrusion Of Metal (AREA)
EP83304146A 1982-07-19 1983-07-18 Strangpressmaschine Withdrawn EP0099744A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8220873 1982-07-19
GB8220873 1982-07-19

Publications (2)

Publication Number Publication Date
EP0099744A2 true EP0099744A2 (de) 1984-02-01
EP0099744A3 EP0099744A3 (de) 1985-08-14

Family

ID=10531767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83304146A Withdrawn EP0099744A3 (de) 1982-07-19 1983-07-18 Strangpressmaschine

Country Status (15)

Country Link
EP (1) EP0099744A3 (de)
JP (1) JPS5927711A (de)
AU (1) AU557952B2 (de)
CA (1) CA1209529A (de)
DK (1) DK319583A (de)
FI (1) FI832612A7 (de)
GB (1) GB2124529B (de)
HK (1) HK5686A (de)
MY (1) MY8600713A (de)
NO (1) NO155277C (de)
NZ (1) NZ204826A (de)
PH (1) PH21018A (de)
SG (1) SG85285G (de)
ZA (1) ZA834696B (de)
ZW (1) ZW14283A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130059A3 (de) * 1983-06-23 1987-06-03 BICC Public Limited Company Strangpressmaschine
CN112658055A (zh) * 2020-12-15 2021-04-16 大连康丰科技有限公司 一种连续挤压机的挤压轮

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0625863B2 (ja) * 1986-07-30 1994-04-06 富士写真フイルム株式会社 はがき付写真プリントの製造装置
CA2358746A1 (en) * 2000-11-07 2002-05-07 Robert A. Schwartz Apparatus for continuous friction-actuated extrusion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206977A (en) * 1937-11-20 1940-07-09 Western Electric Co Apparatus for extruding metal sheath or pipe
DE1224258B (de) * 1962-06-14 1966-09-08 Siemens Ag Kuehlvorrichtung im Dorn von metall-verarbeitenden Kabelummantelungspressen
CH540076A (de) * 1971-03-18 1973-08-15 Alusuisse Verfahren und Vorrichtung zum Strangpressen von Werkstücken insbesondere aus Aluminiumlegierungen
GB2028207B (en) * 1978-08-15 1982-06-23 Atomic Energy Authority Uk Extrusion apparatus
GB2089703B (en) * 1980-12-22 1984-08-01 Atomic Energy Authority Uk Friction effected extrusion apparatus
GB2102321B (en) * 1981-07-24 1984-11-14 Bicc Plc Friction-actuated extrusion
SU1009547A1 (ru) * 1981-07-24 1983-04-07 Предприятие П/Я Г-4908 Игла дл прессовани труб

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130059A3 (de) * 1983-06-23 1987-06-03 BICC Public Limited Company Strangpressmaschine
CN112658055A (zh) * 2020-12-15 2021-04-16 大连康丰科技有限公司 一种连续挤压机的挤压轮

Also Published As

Publication number Publication date
MY8600713A (en) 1986-12-31
GB2124529A (en) 1984-02-22
ZW14283A1 (en) 1983-09-14
NZ204826A (en) 1985-08-16
FI832612L (fi) 1984-01-20
GB8319326D0 (en) 1983-08-17
EP0099744A3 (de) 1985-08-14
ZA834696B (en) 1984-03-28
GB2124529B (en) 1985-09-18
JPS5927711A (ja) 1984-02-14
HK5686A (en) 1986-01-31
AU557952B2 (en) 1987-01-15
NO832605L (no) 1984-01-20
NO155277B (no) 1986-12-01
CA1209529A (en) 1986-08-12
FI832612A0 (fi) 1983-07-18
SG85285G (en) 1986-11-21
NO155277C (no) 1987-03-11
PH21018A (en) 1987-06-30
DK319583D0 (da) 1983-07-11
FI832612A7 (fi) 1984-01-20
DK319583A (da) 1984-01-20
AU1642583A (en) 1984-01-26

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19851128

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Effective date: 19861120

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18D Application deemed to be withdrawn

Effective date: 19880512

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FAIREY, NORMAN REGINALD