GB1253393A - Method of and apparatus for forming and cooling a thermoplastic cylindrical tube - Google Patents

Method of and apparatus for forming and cooling a thermoplastic cylindrical tube

Info

Publication number
GB1253393A
GB1253393A GB51067/69A GB5106769A GB1253393A GB 1253393 A GB1253393 A GB 1253393A GB 51067/69 A GB51067/69 A GB 51067/69A GB 5106769 A GB5106769 A GB 5106769A GB 1253393 A GB1253393 A GB 1253393A
Authority
GB
United Kingdom
Prior art keywords
mandrel
air
extrudate
chamber
cooled
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
GB51067/69A
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.)
PROSYN SA
Original Assignee
PROSYN SA
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 PROSYN SA filed Critical PROSYN SA
Publication of GB1253393A publication Critical patent/GB1253393A/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
    • 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
    • B29C48/902—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 internally
    • 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
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending

Abstract

1,253,393. Extruding thermoplastics tubes and films. PROSYN S.A. 17 Oct., 1969 [22 Oct., 1968], No. 51067/69. Headings B5A and B5B. In the production of thermoplastics tubular material which may be of film thickness, i.e. 0À01-0À25 mm., tubular extrudate 7 from an extrusion head 2 is cooled externally by air delivered from a rotating ring 6 and internally by contact with a cooled mandrel 4, the air from ring 6 being directed to produce a zone of reduced pressure between the annulus of air and the extrudate and upstream of the point where the air contacts the extrudate, the air within chamber 19 being cooled by mandrel 4 to precool the internal surface of the extrudate, and the pressure inside chamber 19 being adjusted in conjunction with the zone of reduced pressure to achieve a required diameter of the extrudate prior to its contact with the mandrel. Ring 6 is adjustable to modify the size of its air outlet. Coolant, e.g. water, is delivered to mandrel 4, Fig. 3, via conduit 14 and removed via conduit 15. Air pressure in chamber 19 is adjusted via ducts 17, 18 and any air carried forward by the extrudate to chamber 20 downstream of mandrel 4 is removed via conduit 13. Mandrel 4, which is axially adjustable, carries a flattening device comprising shoes 22 movable by reciprocation of a piston-like member 25. Downstream of the flattening device are haul-off rolls 9, Fig. 2, and a wind-up spool (not shown). To distribute any irregularities in the product over the width of the spool, rolls 9 are reciprocated or the mandrel and/or extrusion head are rotated. The apparatus is fully automatic being controlled from a panel 11, Fig. 2, and Fig. 1 (not shown), which is shown diagrammatically connected by lines (a-g) to the areas where adjustment may be made.
GB51067/69A 1968-10-22 1969-10-17 Method of and apparatus for forming and cooling a thermoplastic cylindrical tube Expired GB1253393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR69050519 1968-10-22

Publications (1)

Publication Number Publication Date
GB1253393A true GB1253393A (en) 1971-11-10

Family

ID=9695680

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51067/69A Expired GB1253393A (en) 1968-10-22 1969-10-17 Method of and apparatus for forming and cooling a thermoplastic cylindrical tube

Country Status (7)

Country Link
BE (1) BE739641A (en)
CH (1) CH496533A (en)
DE (1) DE1951645A1 (en)
FR (1) FR1592180A (en)
GB (1) GB1253393A (en)
LU (1) LU59547A1 (en)
NL (1) NL6915930A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976414A (en) * 1974-03-22 1976-08-24 Wilhelm Hegler Apparatus for the production of double-walled synthetic plastic tubes having a transversely corrugated outer wall and a smooth inner wall
GB2285767A (en) * 1994-01-24 1995-07-26 Windmoeller & Hoelscher Apparatus for calibrating and supporting an extruded tubular film

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2721609C2 (en) * 1977-05-13 1986-07-10 Reifenhäuser KG, 5210 Troisdorf Control device for a plant for the production of blown plastic films
DE2831212A1 (en) * 1978-07-15 1980-01-24 Dow Chemical Co Blown film prodn. control - e.g. in revolving tube process, controls air ring supply responsive to pyrometer signal below frost line
CN109291390B (en) * 2018-11-02 2023-11-03 江苏康宏医疗科技有限公司 Preparation of spring hose inner tube and take-up device of hemostatic forceps, biopsy forceps and foreign body forceps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976414A (en) * 1974-03-22 1976-08-24 Wilhelm Hegler Apparatus for the production of double-walled synthetic plastic tubes having a transversely corrugated outer wall and a smooth inner wall
GB2285767A (en) * 1994-01-24 1995-07-26 Windmoeller & Hoelscher Apparatus for calibrating and supporting an extruded tubular film
GB2285767B (en) * 1994-01-24 1997-09-17 Windmoeller & Hoelscher Apparatus for calibrating and supporting an extruded tubular film blown up into a film bubble

Also Published As

Publication number Publication date
FR1592180A (en) 1970-05-11
NL6915930A (en) 1970-04-24
CH496533A (en) 1970-09-30
LU59547A1 (en) 1970-01-09
BE739641A (en) 1970-03-02
DE1951645A1 (en) 1970-06-04

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