GB1075704A

GB1075704A – Process and apparatus for producing elastic memory articles
– Google Patents

GB1075704A – Process and apparatus for producing elastic memory articles
– Google Patents
Process and apparatus for producing elastic memory articles

Info

Publication number
GB1075704A

GB1075704A
GB36614/64A
GB3661464A
GB1075704A
GB 1075704 A
GB1075704 A
GB 1075704A
GB 36614/64 A
GB36614/64 A
GB 36614/64A
GB 3661464 A
GB3661464 A
GB 3661464A
GB 1075704 A
GB1075704 A
GB 1075704A
Authority
GB
United Kingdom
Prior art keywords
tube
tubing
pressure
chamber
cooling
Prior art date
1963-09-26
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
GB36614/64A
Inventor
Pierre Edward Wray
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.)

Raychem Corp

Original Assignee
Raychem Corp
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.)
1963-09-26
Filing date
1964-09-07
Publication date
1967-07-12

1964-09-07
Application filed by Raychem Corp
filed
Critical
Raychem Corp

1967-07-12
Publication of GB1075704A
publication
Critical
patent/GB1075704A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

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

B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor

B29C61/003—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor characterised by the choice of 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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels

B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article

B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies

B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally

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

B29C61/06—Making preforms having internal stresses, e.g. plastic memory

B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article

B29C48/905—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using wet calibration, i.e. in a quenching tank

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article

B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/91—Heating, e.g. for cross linking

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/911—Cooling

B29C48/9115—Cooling of hollow articles

B29C48/912—Cooling of hollow articles of tubular films

B29C48/913—Cooling of hollow articles of tubular films externally

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/911—Cooling

B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means

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

B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

B29C48/25—Component parts, details or accessories; Auxiliary operations

B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling

B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material

Abstract

1,075,704. Dimensionally heat – unstable hollow articles; moulding. RAYCHEM CORPORATION. Sept. 7, 1964 [Sept. 26, 1963], No. 36614/64. Headings B5A and B5B. Dimensionally heat-unstable hollow articles are made by (1) passing a tube of crystalline or cross – linked crystalline polymeric material through a heating zone open to the atmosphere to heat the tube to a temperature equal to or above its crystalline melting temperature or range, (2) while the tube is at this temperature, passing the tube through a zone of partial vacuum to impart a pressure differential between the inside and outside of the tube, the pressure differential being insufficient to bring about a change of dimensions of the tube equal to the desired predetermined change of dimensions while the tube is at a temperature greater than the crystalline melting temperature or range, but being sufficient to cause a predetermined dimensional change when the tube is cooled through the crystalline melting range of the polymer, and (3) passing the tube through a cooling zone, while maintaining the pressure differential so as to cool the tube below the crystalline melting temperature or range, and to set the tube at its changed and predetermined dimensions. Superatmospheric pressure may be applied to the interior of the tube throughout the process. The crystalline polymer, e.g. polyvinyl chloride, polyethylene, polytetrafluorethylene, neoprene or silicone rubber, may be cross-linked by irradiation of at least 2 x 106 rads or by chemical means equivalent to such an irradiation dose. The polymer may be blended with an elastomer to produce an elastomeric tubing. Apparatus for use on the process comprises means for supplying heat to the tubing while the external surface thereof is subjected to substantially atmospheric pressure, a chamber provided with inlet and outlet means, and means for cooling the tubing passing through the chamber, the interior of which is adapted to be maintained at a pressure substantially different from atmospheric, the arrangement being such that the tubing is raised to a desired temperature before passage through the chamber. In one embodiment (Fig. 1), irradiated polyethylene tubing 11 is continuously fed into tank 15 containing heated oil. The tube, into the interior of which air under pressure is continuously fed from tank 70, then enters expansion assembly 25, the interior of which is maintained under reduced pressure. As the tube passes through the expansion assembly, it expands as it cools to the final predetermined diameter 11a when the tube contacts the inside surface of cooling die 35. The expanded tubing then passes through final cooling and rinsing bath 60 and reeled at 66. The speeds of capstans 12 and 64, and rolls 20, 21 are adjusted so that the speed of the unexpanded tube in tank 15 ahead of roll 21 is sufficiently greater than that of the tube between roll 21 and capstan 64 so that no tension is applied to the unexpanded tube in tank 15. Expansion differential pressure is controlled by valve 51a. The expansion assembly (Fig. 3) comprises a cylinder 26 having end wall 27 provided with a removable sealing die 29. Mounted within the cylinder is a piston member 32 comprising ring 33 secured to cylindrical wall member 34 and to cooling die 35 comprising cylinder 36, end wall 37, rear wall 38, and inner cylinder 39 of a diameter equal to the desired final diameter of the tube. Coolant chamber 40 is supplied through inlet 41 and outlet 42. The spacing between member 32 and wall 27 may be adjusted by means of screw assemblies 47, and the partial vacuum in chamber 50 is imposed by vacuum line 51. The end wall 38 of the cooling chamber is sealed by rubber diaphragm 160.

GB36614/64A
1963-09-26
1964-09-07
Process and apparatus for producing elastic memory articles

Expired

GB1075704A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US311715A

US3370112A
(en)

1963-09-26
1963-09-26
Process and apparatus for producing plastic memory articles

Publications (1)

Publication Number
Publication Date

GB1075704A
true

GB1075704A
(en)

1967-07-12

Family
ID=23208140
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB36614/64A
Expired

GB1075704A
(en)

1963-09-26
1964-09-07
Process and apparatus for producing elastic memory articles

Country Status (2)

Country
Link

US
(1)

US3370112A
(en)

GB
(1)

GB1075704A
(en)

Cited By (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

EP0103937A2
(en)

*

1982-08-23
1984-03-28
Cable Technology Laboratories, Inc.
Heat shrinkable tubing for high voltage cable and method of manufacturing

CN111941815A
(en)

*

2020-06-30
2020-11-17
大连联合高分子材料有限公司
Pyrocondensation pipe expansion control system

Families Citing this family (28)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CH439699A
(en)

*

1965-12-22
1967-07-15
Seiler Bernhard

Process for the production of containers made of plastic and device for carrying out the process

US3427638A
(en)

*

1967-04-18
1969-02-11
Dow Corning
Automatic device for producing expanded tubing

LU57593A1
(en)

*

1967-12-20
1969-04-08

US3526683A
(en)

*

1968-03-22
1970-09-01
Raychem Corp
Method for dual crosslinking

US3687585A
(en)

*

1970-01-02
1972-08-29
Haruo Takagi
Apparatus for manufacturing synthetic resin tube provided with heat-shrinking property

US3872194A
(en)

*

1970-09-30
1975-03-18
Grace W R & Co
Process for producing a bulk cushioning material

GB1454838A
(en)

*

1973-05-10
1976-11-03
Sumitomo Electric Industries
Heat-shrinkable tubing

US4104394A
(en)

*

1975-12-15
1978-08-01
Sumitomo Electric Industries, Ltd.
Method for diametrically expanding thermally contractive ptfe resin tube

US4376621A
(en)

*

1977-03-31
1983-03-15
The Dow Chemical Company
Method and apparatus for tube extrusion

US4321292A
(en)

*

1980-06-23
1982-03-23
Oy Wiik & Hoglund Ab
Method of manufacturing shrinkable sleeves from a cross-linking plastics material

DK155983C
(en)

*

1981-01-26
1989-10-16
Wirsbo Pex Gmbh

PROCEDURE FOR DESIGNING PIPES OF FORM

US5447665A
(en)

*

1986-03-31
1995-09-05
Nupipe, Inc.
Method of removal of replacement pipe installed in an existing conduit

US4702710A
(en)

*

1986-06-20
1987-10-27
Georgia Tech Research Corporation
Waterproof seal assembly for electrical connector

JPH0236923A
(en)

*

1988-04-23
1990-02-06
Sumitomo Electric Ind Ltd
Manufacturing device for heat-shrinkable tube

US5037178A
(en)

*

1988-12-22
1991-08-06
Kingston Technologies, L.P.
Amorphous memory polymer alignment device

US5066091A
(en)

*

1988-12-22
1991-11-19
Kingston Technologies, Inc.
Amorphous memory polymer alignment device with access means

US4969705A
(en)

*

1990-01-19
1990-11-13
Kingston Technologies, L.P.
Memory polymer multiple cavity fiber splicer

US5243876A
(en)

*

1990-08-15
1993-09-14
Markel Corporation
Cable assemblies and methods of producing same

NZ272354A
(en)

*

1994-06-17
1997-10-24
Trudell Medical Ltd
Catheter system; method and apparatus for delivering an aerosol form of medication to the lungs, details of method and of catheter apparatus

US6729334B1
(en)

*

1994-06-17
2004-05-04
Trudell Medical Limited
Nebulizing catheter system and methods of use and manufacture

US5733487A
(en)

*

1996-05-31
1998-03-31
Raychem Corporation
Method of expanding polymeric tubing

DE10306425B4
(en)

*

2003-02-15
2006-12-28
Lüers, Gregor

Device for sealing the inlet or outlet of a treatment section

US7413785B2
(en)

2003-08-07
2008-08-19
Tyco Electronics Corporation
Heat-recoverable foam tubing

FR2861011A1
(en)

*

2003-10-17
2005-04-22
Cebal Sas
Outer surface treatment procedure for tubular plastic extrusions uses chamber with pressure different to atmospheric and deformable seal at one end

EP1680173B1
(en)

*

2003-10-31
2011-01-12
Trudell Medical International
System for manipulating a catheter for delivering a substance to a body cavity

US20080317991A1
(en)

2007-06-19
2008-12-25
Tyco Electronics Corporation
Multiple wall dimensionally recoverable tubing for forming reinforced medical devices

US9003635B2
(en)

*

2008-04-08
2015-04-14
Formway Furniture Limited
Injection moulding method

US9296165B1
(en)

2013-01-04
2016-03-29
Dale L. Henson
Apparatuses for expanding tubing and methods of use

Family Cites Families (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

NL130678C
(en)

*

1960-07-15
1900-01-01

US3190739A
(en)

*

1961-11-15
1965-06-22
Corning Glass Works
Tube drawing

US3213165A
(en)

*

1962-09-17
1965-10-19
Phillips Petroleum Co
Process of radiant heating tubular bodies through absorbing gases

1963

1963-09-26
US
US311715A
patent/US3370112A/en
not_active
Expired – Lifetime

1964

1964-09-07
GB
GB36614/64A
patent/GB1075704A/en
not_active
Expired

Cited By (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

EP0103937A2
(en)

*

1982-08-23
1984-03-28
Cable Technology Laboratories, Inc.
Heat shrinkable tubing for high voltage cable and method of manufacturing

EP0103937A3
(en)

*

1982-08-23
1986-02-05
Cable Technology Laboratories, Inc.
Heat shrinkable tubing for high voltage cable and method of manufacturing

CN111941815A
(en)

*

2020-06-30
2020-11-17
大连联合高分子材料有限公司
Pyrocondensation pipe expansion control system

Also Published As

Publication number
Publication date

US3370112A
(en)

1968-02-20

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