WO2015059239A1 - Procédé de fabrication et moule pour fabriquer un joint de forme spiralée - Google Patents

Procédé de fabrication et moule pour fabriquer un joint de forme spiralée Download PDF

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Publication number
WO2015059239A1
WO2015059239A1 PCT/EP2014/072780 EP2014072780W WO2015059239A1 WO 2015059239 A1 WO2015059239 A1 WO 2015059239A1 EP 2014072780 W EP2014072780 W EP 2014072780W WO 2015059239 A1 WO2015059239 A1 WO 2015059239A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
ingates
mold
spiral
gasket
Prior art date
Application number
PCT/EP2014/072780
Other languages
English (en)
Inventor
Bruno Agnus
Original Assignee
Produits Plastiques Performants Holding - 3P Holding
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 FR1360371A external-priority patent/FR3012361B1/fr
Application filed by Produits Plastiques Performants Holding - 3P Holding filed Critical Produits Plastiques Performants Holding - 3P Holding
Publication of WO2015059239A1 publication Critical patent/WO2015059239A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0027—Gate or gate mark locations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
    • B29L2031/265—Packings, Gaskets

Definitions

  • Spiral compressors generally comprise a leaktight enclosure containing a stationary volute and a movable volute, each volute comprising an end plate from which there extends a spiral.
  • the spirals of the stationary and movable volutes are engaged one in the other so as to define compression chambers of variable volume.
  • two spiral-shaped sealing segments are arranged between the free end of each spiral and the end plate of the opposite volute.
  • a spiral- shaped groove is formed in the end of each volute spiral for the purpose of receiving the corresponding sealing segment, at least in part.
  • each of those four flows having exactly the same distance to travel inside the cavity (i.e. one- fourth of the total length of the cavity) . That serves to minimize the distance that needs to be traveled by each flow, thereby avoiding the material cooling and solidifying prematurely.
  • the mold of the invention serves to optimize filling since at least two injection points are used.
  • the mold has three distinct ingates .
  • Figure 1 shows a prior art spiral gasket, as obtained at the end of the molding step
  • Figure 5 shows a spiral gasket in accordance with one embodiment .
  • the injection of molten plastic material via the two injection points 28, 29 generates four fronts of material, with each of the fronts of material traveling along an identical distance in the mold cavity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un moule (1) pour fabriquer un joint spiralé (20; 30; 40) constitué de matière plastique, le moule (1) comprenant au moins une cavité spiralée et, aux fins d'alimentation en matière plastique fondue, comprenant également deux amorces de coulée (28, 29; 32, 33) distincts, ces amorces de coulée (28, 29; 32, 33) étant conçues sur la même face d'une cavité.
PCT/EP2014/072780 2013-10-24 2014-10-23 Procédé de fabrication et moule pour fabriquer un joint de forme spiralée WO2015059239A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1360371 2013-10-24
FR1360371A FR3012361B1 (fr) 2013-10-24 2013-10-24 Procede de fabrication et moule pour la fabrication d'un joint de forme spiralee
US14/340,974 US20150115503A1 (en) 2013-10-24 2014-07-25 Method of fabrication and a mold for fabricating a gasket of spiral shape
US14/340,974 2014-07-25

Publications (1)

Publication Number Publication Date
WO2015059239A1 true WO2015059239A1 (fr) 2015-04-30

Family

ID=51868945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/072780 WO2015059239A1 (fr) 2013-10-24 2014-10-23 Procédé de fabrication et moule pour fabriquer un joint de forme spiralée

Country Status (1)

Country Link
WO (1) WO2015059239A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022121065A1 (de) 2022-08-19 2024-02-22 Elringklinger Ag Verfahren und Gusswerkzeug zur Herstellung eines Dichtelements, Dichtelement
DE102022121064A1 (de) 2022-08-19 2024-02-22 Elringklinger Ag Verfahren und Gusswerkzeug zur Herstellung eines Dichtelements

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04262087A (ja) * 1991-01-21 1992-09-17 Mitsubishi Electric Corp スクロール圧縮機のチップシール
JPH081723A (ja) * 1994-06-17 1996-01-09 Nippondenso Co Ltd スクロール型圧縮機のシール部材及びその製造方法並びに成形用型
US5767186A (en) * 1994-06-27 1998-06-16 Ntn Corporation Composition for seal member for compressor and method of manufacturing tip seal for scroll type compressor
US6126422A (en) 1997-10-24 2000-10-03 American Standard Inc. Tip seal for scroll type compressor and manufacturing method therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04262087A (ja) * 1991-01-21 1992-09-17 Mitsubishi Electric Corp スクロール圧縮機のチップシール
JPH081723A (ja) * 1994-06-17 1996-01-09 Nippondenso Co Ltd スクロール型圧縮機のシール部材及びその製造方法並びに成形用型
US5767186A (en) * 1994-06-27 1998-06-16 Ntn Corporation Composition for seal member for compressor and method of manufacturing tip seal for scroll type compressor
US6126422A (en) 1997-10-24 2000-10-03 American Standard Inc. Tip seal for scroll type compressor and manufacturing method therefor
US6270713B1 (en) 1997-10-24 2001-08-07 American Standard International Inc. Tip seal for scroll type compressors and manufacturing method therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022121065A1 (de) 2022-08-19 2024-02-22 Elringklinger Ag Verfahren und Gusswerkzeug zur Herstellung eines Dichtelements, Dichtelement
DE102022121064A1 (de) 2022-08-19 2024-02-22 Elringklinger Ag Verfahren und Gusswerkzeug zur Herstellung eines Dichtelements

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