EP0363667A2 - Presse d'extrusion continue pour la récupération des déchets provenant de l'usinage de l'aluminium et ses alliages, avec production d'articles semi-finis extrudés - Google Patents

Presse d'extrusion continue pour la récupération des déchets provenant de l'usinage de l'aluminium et ses alliages, avec production d'articles semi-finis extrudés Download PDF

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Publication number
EP0363667A2
EP0363667A2 EP89117010A EP89117010A EP0363667A2 EP 0363667 A2 EP0363667 A2 EP 0363667A2 EP 89117010 A EP89117010 A EP 89117010A EP 89117010 A EP89117010 A EP 89117010A EP 0363667 A2 EP0363667 A2 EP 0363667A2
Authority
EP
European Patent Office
Prior art keywords
scraps
extruder
ceramic material
aluminum
continuous
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Withdrawn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
EP89117010A
Other languages
German (de)
English (en)
Other versions
EP0363667A3 (fr
Inventor
Claudio Atzori
Giorgio Pompei
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.)
Aluminia SpA
Original Assignee
Aluminia SpA
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 Aluminia SpA filed Critical Aluminia SpA
Publication of EP0363667A2 publication Critical patent/EP0363667A2/fr
Publication of EP0363667A3 publication Critical patent/EP0363667A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to a continuous extruder for recovering the scraps, the swarf and the filings deriving from the machining of aluminum and its alloys, with continuous semifinished articles being produced, having the shape of rods, wires and bodies with various cross-section outlines.
  • a purpose of the present invention is of providing a continuous extruder for recovering, as extruded semifinished articles, the scraps and the like, deriving from the machining of aluminum and of its alloys, which has such a structure as to directly accomplish the continuous extrusion at a high pressure and at a high temperature, with an useful life of the matrices and of the other parts subject to wear, which is considerably higher than of the extruders known from the prior art.
  • Another purpose of the present invention is of providing a highly reliable extruder, such as to make it possible semifinished articles to be obtained which are endowed with improved surface qualities and with constant dimensional characteristics.
  • a continuous extruder for recovering, as continuous-­extruded semifinished articles, the scraps deriving from the machininig of aluminum and its alloys, and in particular scraps containing incorporated skins and oxides, suitable for being extruded under high specific pressures and at a high temperature
  • extruder according to the present invention, the matrix and at least a portion of the tools comprising the inlet plates, the tight-sealing plate, the feed plate and the stop element, are made from a ceramic material selected from the group comprising the materials constituted by aluminum and silicon nitrides and oxides and the materials constituted by zirconium oxide, with said matrix and said tools of ceramic material being associated with an extruder having such a structure as to generate high specific pressures and a high temperature by internal friction, so as to make it possible said scraps to be extruded according to a direct, continuous extrusion method, with said scraps being transformed into semifinished
  • said ceramic material is constituted by sintered or also electro-melted zirconium oxide, or by materials based on such compounds as Si3N4/Al2O3/SiO2/AlN variously combined with, and in different proportions to, one another, commonly denominated SIALON.
  • a "Conform" extruder is substantially constituted by a revolving wheel 1, provided with a continuous peripheral, open groove 2.
  • a portion, equivalent to about 1/4 of its length, of the groove 2 is tightly sealed by a stationary containment sole 3, which usually is constitued by a steel plate.
  • An end of the sole 3 is into contact with a metal body 4 having an inner hollow, with whose upper end a matrix 5, also of steel, like the sole, is associated.
  • the hollow 4a of the body 4 constitutes an expansion chamber which showed to be useful in order to extrude semifinished articles having a larger size than the materials fed to the extruder.
  • the matrix 5 and the relevant expansion chamber are coaxial with each other and are positioned along a radial direction relatively to the wheel 1.
  • a stop element 6 is positioned downstream the matrix 5 and is partially inserted inside the groove 2; its function is of diverting the material fed as a preformed rod 8, which advances between the sole and the groove, into the expansion chamber 4a and then into the matrix 5.
  • the wear elements comprising a first inlet plate 9, a second inlet plate 10, a tight-­sealing plate 11, a feed plate 4, the stop element 6 and the matrix 5, which are shaped according to the required type, shape and size of the desired extruded semifinished articles, are made from a SIALON ceramic material based on Si3N4/Al2O3/SiO2/AlN compounds.
  • Said pre-treated scraps can be advantageously pre-compressed during the feed step, e.g., by means of an idling wheel, or any other equivalent means, not shown in the figure, and suitably positioned upstream the first inlet plate 8.
  • the tools and the matrix are always kept into contact with each other and maintained in their position by means of a "block” or "sole” or “containment body” 12.
  • the hollow element, or feed plate, 4 which constitutes the expansion chamber 4a and the stop element 6 are made from the same ceramic material which constitutes said inlet and sealing plates, and the matrix.
  • the extruder provided according to the present invention showed to be particularly efficacious for recovering -- as a continuous-extruded rod -- scraps of aluminun and its alloys treated according to the recovery process as disclosed in the above cited patent application IT No. 19,813 A/86.
  • the present Applicant was able to observe that the wear elements substantially constituted by the whole of the tools and matrix made from SIALON, extrusion ratios and speeds are achieved, which are higher than as obtainabke with the traditional extruders of "Conform" type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP19890117010 1988-10-11 1989-09-14 Presse d'extrusion continue pour la récupération des déchets provenant de l'usinage de l'aluminium et ses alliages, avec production d'articles semi-finis extrudés Withdrawn EP0363667A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2226888 1988-10-11
IT8822268A IT1230511B (it) 1988-10-11 1988-10-11 Estrusore continuo per il ricupero degli sfridi delle lavorazioni meccaniche di alluminio e sue leghe con produzione di semilavorati estrusi

Publications (2)

Publication Number Publication Date
EP0363667A2 true EP0363667A2 (fr) 1990-04-18
EP0363667A3 EP0363667A3 (fr) 1991-01-02

Family

ID=11193917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890117010 Withdrawn EP0363667A3 (fr) 1988-10-11 1989-09-14 Presse d'extrusion continue pour la récupération des déchets provenant de l'usinage de l'aluminium et ses alliages, avec production d'articles semi-finis extrudés

Country Status (2)

Country Link
EP (1) EP0363667A3 (fr)
IT (1) IT1230511B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595084A (en) * 1994-04-12 1997-01-21 Yugen Kaisha Yano Engineering Hollow die and an apparatus for continuous extrusion forming of hollow articles
CN100409958C (zh) * 2006-09-29 2008-08-13 大连康丰科技有限公司 一种组合式连续挤压机的腔体
CN104043669A (zh) * 2013-03-15 2014-09-17 南线有限责任公司 提供塑性区挤压
CN105817490A (zh) * 2015-05-27 2016-08-03 河南华洋铜业集团有限公司 铝挤压装置及其挤压腔体结构
US9616497B2 (en) 2010-07-09 2017-04-11 Southwire Company Providing plastic zone extrusion

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595084A (en) * 1994-04-12 1997-01-21 Yugen Kaisha Yano Engineering Hollow die and an apparatus for continuous extrusion forming of hollow articles
CN100409958C (zh) * 2006-09-29 2008-08-13 大连康丰科技有限公司 一种组合式连续挤压机的腔体
US9616497B2 (en) 2010-07-09 2017-04-11 Southwire Company Providing plastic zone extrusion
CN104043669A (zh) * 2013-03-15 2014-09-17 南线有限责任公司 提供塑性区挤压
EP2777837A1 (fr) * 2013-03-15 2014-09-17 Southwire Company, LLC Système et methode d'extrusion de zone en plastique
CN105817490A (zh) * 2015-05-27 2016-08-03 河南华洋铜业集团有限公司 铝挤压装置及其挤压腔体结构

Also Published As

Publication number Publication date
IT8822268A0 (it) 1988-10-11
IT1230511B (it) 1991-10-25
EP0363667A3 (fr) 1991-01-02

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