FR2395123A2 - Forming bends and grooved sockets in pressurised thermoplastic pipe - using excess external pressure to form the socket profile - Google Patents

Forming bends and grooved sockets in pressurised thermoplastic pipe - using excess external pressure to form the socket profile

Info

Publication number
FR2395123A2
FR2395123A2 FR7719553A FR7719553A FR2395123A2 FR 2395123 A2 FR2395123 A2 FR 2395123A2 FR 7719553 A FR7719553 A FR 7719553A FR 7719553 A FR7719553 A FR 7719553A FR 2395123 A2 FR2395123 A2 FR 2395123A2
Authority
FR
France
Prior art keywords
socket
external pressure
pressurised
thermoplastic pipe
socket profile
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.)
Granted
Application number
FR7719553A
Other languages
French (fr)
Other versions
FR2395123B2 (en
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.)
MEGIAS ETS JOSEPH
Original Assignee
MEGIAS ETS JOSEPH
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 MEGIAS ETS JOSEPH filed Critical MEGIAS ETS JOSEPH
Priority to FR7719553A priority Critical patent/FR2395123A2/en
Publication of FR2395123A2 publication Critical patent/FR2395123A2/en
Application granted granted Critical
Publication of FR2395123B2 publication Critical patent/FR2395123B2/fr
Granted legal-status Critical Current

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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/08—Belling or enlarging, e.g. combined with forming a groove using pressure difference
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/079—Auxiliary parts or inserts
    • B29C2949/08—Preforms made of several individual parts, e.g. by welding or gluing parts together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/258—Tubular
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • 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
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/243—Elbows

Abstract

Appts. for forming socket ends and bends in thermoplastic tubing while supporting the tube section by a combination of a flexible core mandrel and internal pneumatic pressure is modified by lining the socket mould with sealed cavities to accept a higher pneumatic pressure against the outside of the socket wall than is applied within the tubing. The positive external pressure differential ensures that the socket profile closely follows that of an ancillary core mandrel used to determine the dimensions of the socket base and of a channel formed in the socket wall to accept an annular seal.
FR7719553A 1977-06-23 1977-06-23 Forming bends and grooved sockets in pressurised thermoplastic pipe - using excess external pressure to form the socket profile Granted FR2395123A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7719553A FR2395123A2 (en) 1977-06-23 1977-06-23 Forming bends and grooved sockets in pressurised thermoplastic pipe - using excess external pressure to form the socket profile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7719553A FR2395123A2 (en) 1977-06-23 1977-06-23 Forming bends and grooved sockets in pressurised thermoplastic pipe - using excess external pressure to form the socket profile

Publications (2)

Publication Number Publication Date
FR2395123A2 true FR2395123A2 (en) 1979-01-19
FR2395123B2 FR2395123B2 (en) 1981-02-06

Family

ID=9192586

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7719553A Granted FR2395123A2 (en) 1977-06-23 1977-06-23 Forming bends and grooved sockets in pressurised thermoplastic pipe - using excess external pressure to form the socket profile

Country Status (1)

Country Link
FR (1) FR2395123A2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067885A (en) * 1988-06-17 1991-11-26 Gencorp Inc. Rapid change die assembly
US5069853A (en) * 1988-06-17 1991-12-03 Gencorp Inc. Method of configuring extrudate flowing from an extruder die assembly
US5219588A (en) * 1990-02-12 1993-06-15 Gencorp Inc. Die assembly control
EP0700771A1 (en) * 1994-08-23 1996-03-13 S.I.C.A. SERRANDE INFISSI CARPENTERIA ATTREZZATURA S.p.A. A pressurized-fluid workhead for permanent bellforming of end tracts of plastic pipes, for use in automatic bellforming machines
US5562875A (en) * 1988-06-17 1996-10-08 Gencorp Inc. Handling system and method for curved extrusions
US6485666B1 (en) 1998-03-11 2002-11-26 William W. Rowley Post extrusion profile processing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067885A (en) * 1988-06-17 1991-11-26 Gencorp Inc. Rapid change die assembly
US5069853A (en) * 1988-06-17 1991-12-03 Gencorp Inc. Method of configuring extrudate flowing from an extruder die assembly
US5562875A (en) * 1988-06-17 1996-10-08 Gencorp Inc. Handling system and method for curved extrusions
US5219588A (en) * 1990-02-12 1993-06-15 Gencorp Inc. Die assembly control
EP0700771A1 (en) * 1994-08-23 1996-03-13 S.I.C.A. SERRANDE INFISSI CARPENTERIA ATTREZZATURA S.p.A. A pressurized-fluid workhead for permanent bellforming of end tracts of plastic pipes, for use in automatic bellforming machines
US5855930A (en) * 1994-08-23 1999-01-05 S.I.C.A. Serrande, Infissi, Carperteria, Attrezzatura S.P.A. Workhead for forming a pipe bell at an end of a pipe made of thermoplastic material
US6485666B1 (en) 1998-03-11 2002-11-26 William W. Rowley Post extrusion profile processing

Also Published As

Publication number Publication date
FR2395123B2 (en) 1981-02-06

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