GB1207448A - Extrusion apparatus for the production of tubes and tubular films of synthetic organic thermoplastic polymeric material - Google Patents

Extrusion apparatus for the production of tubes and tubular films of synthetic organic thermoplastic polymeric material

Info

Publication number
GB1207448A
GB1207448A GB4464/68A GB446468A GB1207448A GB 1207448 A GB1207448 A GB 1207448A GB 4464/68 A GB4464/68 A GB 4464/68A GB 446468 A GB446468 A GB 446468A GB 1207448 A GB1207448 A GB 1207448A
Authority
GB
United Kingdom
Prior art keywords
tubular film
pressure
mandrel
cooling
air
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
GB4464/68A
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.)
SEPROMA GmbH
Original Assignee
SEPROMA GmbH
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 SEPROMA GmbH filed Critical SEPROMA GmbH
Publication of GB1207448A publication Critical patent/GB1207448A/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
    • B29C48/908—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
    • B29C48/03—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
    • B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
    • 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
    • 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
    • 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
    • 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
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • 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
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

1,207,448. Producing tubular films. SEPROMA G.m.b.H. 29 Jan., 1968 [17 Jan., 1968], No. 4464/68. Heading B5B. An apparatus for producing tubular films by the " blown tube " method is provided with an extrusion die comprising a die body 1 (Fig. 1) and a core or mandrel 2 which define an annular extrusion orifice through which a tubular film 3<SP>1</SP> is melt extruded. The die body has mounted thereon a sizing and cooling sleeve comprising three sections 4, 5 and 6 bolted together to form a tube through which and in contact with the inner surface of which the tubular film is drawn. During its passage through the cooling sleeve the tubular film is cooled to a temperature below the crystalline melting point of the film material by the passage of a cooling medium through the jackets of the sections, 4, 5 and 6. After leaving the cooling sleeve the part 8 of the tubular film is expanded by compressed air at a pressure P1 supplied through an axial bore 7 in the core 2 into a tube 16 coaxial with the core and screwed thereto. The tube 16 increases in diameter towards its free end up to about the inside diameter of the portion 3<SP>1</SP> of the tubular film and is provided at its free end with a hollow mandrel 11 having a passage 20 through which the compressed air supplied at pressure P1 passes into the portion 8 of the tubular film and expands it. The mandrel 11 is cooled by means of a cooling medium which is supplied to and discharged from the hollow interior 21 of the mandrel by means of pipes 14 and 15. The portion 3<SP>1</SP> of the tubular film is urged against the internal surface of the cooling and sizing sleeve 4, 5, 6 by compressed air at pressure p2 introduced into the space 24 between the tube 16 and the portion 3<SP>1</SP> of the tubular film. In order to prevent the air at pressure p2 in the space 24 from escaping into the portion 8 of the tubular film, air at pressure p3 is introduced into the annular recess 12 in the nozzle section 6, said recess surrounding the portion 3<SP>1</SP> of the tubular film whereby the portion 3<SP>1</SP> is urged by the pressure p3 of the compressed air against the sealing body 11. The outlet 13 of the cooling and sizing sleeve 4, 5, 6 is slightly constricted towards its outer end to minimize the escape of air at pressure p3 from the recess 12. After leaving the cooling and sizing sleeve 4, 5 6, the tubular film is inflated by the air at pressure p1 introduced into its interior, passed between two mutually inclined members initially to flatten it and hauled off and completely flattened by a pair of driven nip rolls in the usual manner. In the alternative embodiment shown in Fig. 3, the tubular film 3 is drawn intermittently in the direction of the arrow between the final portion 31 of the cooling and sizing sleeve and a mandrel 30. Directly adjacent to the inside surface of the section 32 of the tubular film is a temperature adjusting device 33 mounted on the mandrel 30 and supplied with a heating or a cooling medium through a conduit 35 in the mandrel 30. When the temperature of the tubular film section 32 has been adjusted to a required level by the device 33, air at pressure p4 is introduced through a duct 40 in the mandrel into the interior of the section 32 and inflates this section until it assumes the shape shown at 32<SP>1</SP> which is subsequently drawn out of the inflation zone by the nip rolls 42.
GB4464/68A 1968-01-17 1968-01-29 Extrusion apparatus for the production of tubes and tubular films of synthetic organic thermoplastic polymeric material Expired GB1207448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0113753 1968-01-17

Publications (1)

Publication Number Publication Date
GB1207448A true GB1207448A (en) 1970-09-30

Family

ID=7532724

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4464/68A Expired GB1207448A (en) 1968-01-17 1968-01-29 Extrusion apparatus for the production of tubes and tubular films of synthetic organic thermoplastic polymeric material

Country Status (5)

Country Link
BE (1) BE710044A (en)
CH (1) CH490183A (en)
FR (1) FR1568085A (en)
GB (1) GB1207448A (en)
NL (1) NL6801272A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111469378A (en) * 2020-04-23 2020-07-31 新昌县欧赛机械有限公司 Double-screw type matching equipment for high-strength rubber
CN114789570A (en) * 2022-03-24 2022-07-26 广州市普同实验分析仪器有限公司 Film rigid blowing device and method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729449A1 (en) * 1987-09-03 1989-03-16 Hoechst Ag METHOD AND DEVICE FOR PRODUCING AN EXTRUDED, STRETCHED, SEAMLESS TUBE
CN117799151B (en) * 2024-02-29 2024-06-11 成都航天明江科技实业有限公司 Protective film production equipment and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111469378A (en) * 2020-04-23 2020-07-31 新昌县欧赛机械有限公司 Double-screw type matching equipment for high-strength rubber
CN114789570A (en) * 2022-03-24 2022-07-26 广州市普同实验分析仪器有限公司 Film rigid blowing device and method thereof
CN114789570B (en) * 2022-03-24 2024-05-17 广州市普同实验分析仪器有限公司 Film rigid blowing device and method thereof

Also Published As

Publication number Publication date
NL6801272A (en) 1969-07-21
CH490183A (en) 1970-05-15
BE710044A (en) 1968-05-30
FR1568085A (en) 1969-05-23
DE1729021B2 (en) 1972-09-21
DE1729021A1 (en) 1972-03-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees