GB811592A - Improvements relating to a method of and means for forming a flexible tube - Google Patents

Improvements relating to a method of and means for forming a flexible tube

Info

Publication number
GB811592A
GB811592A GB2870256A GB2870256A GB811592A GB 811592 A GB811592 A GB 811592A GB 2870256 A GB2870256 A GB 2870256A GB 2870256 A GB2870256 A GB 2870256A GB 811592 A GB811592 A GB 811592A
Authority
GB
United Kingdom
Prior art keywords
tube
helix
mandrel
guide tube
pressure
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
Application number
GB2870256A
Inventor
David John Saunders
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.)
Compoflex Co Ltd
Original Assignee
Compoflex Co Ltd
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 Compoflex Co Ltd filed Critical Compoflex Co Ltd
Priority to GB2870256A priority Critical patent/GB811592A/en
Publication of GB811592A publication Critical patent/GB811592A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/006—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor the force created by the liberation of the internal stresses being used for compression moulding or for pressing preformed material
    • 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
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts

Abstract

811,592. Flexible tubes. COMPOFLEX CO. Ltd. Sept. 18, 1957 [Sept. 19, 1956], No. 28702/56. Class 99(2). In a method of making a flexible tube comprising a wire reinforcing helix 1 and at least one seamless, tubular layer of flexible material, such as polyvinyl chloride, rubber or synthetic rubber, a seamless tube 2 having one end 10 sealed is located within a guide tube 5, the internal diameter of which is greater than the external diameter of the resultant flexible tube, with the open end of the tube at or adjacent one end of the guide tube. The tube 2 is expanded against the wall of the guide tube by creating a pressure differential between the inside and outside of the tube, and the helix which has been expanded axially on a mandrel 3 is passed with the latter into the tube whereupon the tube is allowed to contract on to the helix. Finally, the helix and tube are removed from the mandrel and the helix contracts axially so that the tube folds or forms convolutions between the turns of the helix. There may be wire helices or binding material wound externally of one or more covering layers. As shown in Fig. 2, the mandrel has removable end pieces 4 to which the stretched helix is attached and the guide tube 5 has an outlet 8 connected to a vacuum pump 9 by which pressure in the guide tube is reduced to expand the tube 2. In a modification, the tube 2 is located in an open-ended guide tube 5 and is sealed by a gland 10 through which passes a draw-string 17 attached to the mandrel 3 carrying the axially-expanded helix and disposed in a pressure tube 14 ; fluid pressure is admitted to the tube 14 to expand the tube 2 and to enable the mandrel to be drawn thereinto. In another modification, the outlet 8, Fig. 2, of the guide tube is provided with a valve, and a cap, connected to a source of pressure fluid, is engaged over the open end 11 of the tube. Fluid pressure is admitted to the interior of the tube 2 to expand the latter into contact with the guide tube, and the valve is closed and the cap removed, the reduced pressure created within the guide tube holding the tube 2 in an expanded condition for insertion therein of the mandrel and helix.
GB2870256A 1956-09-19 1956-09-19 Improvements relating to a method of and means for forming a flexible tube Expired GB811592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2870256A GB811592A (en) 1956-09-19 1956-09-19 Improvements relating to a method of and means for forming a flexible tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2870256A GB811592A (en) 1956-09-19 1956-09-19 Improvements relating to a method of and means for forming a flexible tube

Publications (1)

Publication Number Publication Date
GB811592A true GB811592A (en) 1959-04-08

Family

ID=10279735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2870256A Expired GB811592A (en) 1956-09-19 1956-09-19 Improvements relating to a method of and means for forming a flexible tube

Country Status (1)

Country Link
GB (1) GB811592A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505214A1 (en) * 1984-02-24 1985-08-29 Pirelli General Plc, London METHOD FOR APPLYING AN ELASTIC HOSE PIECE TO AN LONGER BODY
DE3442494A1 (en) * 1984-11-22 1986-05-22 Kuester & Co Gmbh METHOD FOR COVERING A RISK CABLE WITH A PLASTIC LAYER
DE10239103A1 (en) * 2002-08-27 2004-03-11 Rehau Ag + Co. Elastic sheath assembly onto a barrel connector involves creation of greater pressure inside the sheath than on the outside to ease insertion of the connector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505214A1 (en) * 1984-02-24 1985-08-29 Pirelli General Plc, London METHOD FOR APPLYING AN ELASTIC HOSE PIECE TO AN LONGER BODY
DE3442494A1 (en) * 1984-11-22 1986-05-22 Kuester & Co Gmbh METHOD FOR COVERING A RISK CABLE WITH A PLASTIC LAYER
DE10239103A1 (en) * 2002-08-27 2004-03-11 Rehau Ag + Co. Elastic sheath assembly onto a barrel connector involves creation of greater pressure inside the sheath than on the outside to ease insertion of the connector

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