GB2001576A - Manufacture of thin- walled articles - Google Patents

Manufacture of thin- walled articles

Info

Publication number
GB2001576A
GB2001576A GB787830719A GB7830719A GB2001576A GB 2001576 A GB2001576 A GB 2001576A GB 787830719 A GB787830719 A GB 787830719A GB 7830719 A GB7830719 A GB 7830719A GB 2001576 A GB2001576 A GB 2001576A
Authority
GB
United Kingdom
Prior art keywords
range
sheet
core part
temperature
walled articles
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
GB787830719A
Other versions
GB2001576B (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.)
Bellaplast GmbH
Original Assignee
Bellaplast 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 Bellaplast GmbH filed Critical Bellaplast GmbH
Publication of GB2001576A publication Critical patent/GB2001576A/en
Application granted granted Critical
Publication of GB2001576B publication Critical patent/GB2001576B/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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • B29C51/422—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential
    • B29C51/423—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential through the thickness of the preform
    • 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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. 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
    • B29C48/911—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
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

A method for manufacturing thin- walled articles, for example cups and plates, by thermoforming a sheet of crystalline thermoplastics material which has a critical crystalline melting temperature range. The method includes temperature conditioning the material by heating the core part of the sheet to a temperature higher than the upper limit of the said range, and causing the outer, surface parts of the sheet to be at a temperature lower than the lower limit of the said range. After the temperature conditioning the material is thermoformed with rapid cooling of the core part, which cooling may be combined with reduction in thickness of the web or may take place after such reduction in thickness. The rapid cooling is through the said range and growth of crystals in the core part is controlled.
GB787830719A 1977-07-25 1978-07-21 Method for manufacturing thin-walled articles from crystalline thermoplastics material Expired GB2001576B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81887677A 1977-07-25 1977-07-25

Publications (2)

Publication Number Publication Date
GB2001576A true GB2001576A (en) 1979-02-07
GB2001576B GB2001576B (en) 1982-03-03

Family

ID=25226658

Family Applications (2)

Application Number Title Priority Date Filing Date
GB787830719A Expired GB2001576B (en) 1977-07-25 1978-07-21 Method for manufacturing thin-walled articles from crystalline thermoplastics material
GB787830874A Expired GB2001577B (en) 1977-07-25 1978-07-24 Method of manufacturing thin-walled articles from crystalline thermoplastics material

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB787830874A Expired GB2001577B (en) 1977-07-25 1978-07-24 Method of manufacturing thin-walled articles from crystalline thermoplastics material

Country Status (13)

Country Link
JP (1) JPS5440870A (en)
AR (1) AR215724A1 (en)
AT (2) AT370672B (en)
BE (1) BE869217A (en)
CA (2) CA1114125A (en)
DE (2) DE2830788A1 (en)
ES (1) ES471997A1 (en)
FR (2) FR2398592A1 (en)
GB (2) GB2001576B (en)
IT (2) IT1097332B (en)
NL (2) NL7807832A (en)
SE (1) SE423878B (en)
ZA (2) ZA784184B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133188A1 (en) * 1983-08-05 1985-02-20 Brückner Maschinenbau Gernot Brückner GmbH & Co. KG Process and apparatus for producing a hot-formed plastic composite
WO1985002142A1 (en) * 1983-11-11 1985-05-23 A.A.R.C. (Management) Pty. Limited Molten thermoplastic web feeding process and apparatus

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5281895U (en) * 1975-12-16 1977-06-18
JPS56167411A (en) * 1980-05-30 1981-12-23 Mitsubishi Electric Corp Manufacture of synthetic resin molding
JPS57135110A (en) * 1981-02-16 1982-08-20 Toyo Seikan Kaisha Ltd Manufacture of multilayer plastic vessel
JPS595019A (en) * 1982-07-02 1984-01-11 Toppan Printing Co Ltd Manufacture of heat-resisting container
DE3505828A1 (en) * 1985-02-20 1987-01-22 Benecke Gmbh J METHOD FOR THE PRODUCTION OF MOLDED PLASTIC ELEMENTS, AND THERMOFORMING DEVICE SUITABLE FOR THIS
EP0376211B1 (en) * 1988-12-27 1994-06-08 Idemitsu Petrochemical Co. Ltd. Method of forming an articale out of a themoplastic resin sheet
IE68430B1 (en) * 1990-08-12 1996-06-12 Polysheet Ireland Ltd A method and apparatus for forming an article of PET material
DE4116337C2 (en) * 1991-05-18 1994-01-27 Hatto Dipl Ing Hartnagel Process for producing thin-walled moldings from partially crystalline thermoplastic material, in particular polyolefin, such as polypropylene, by thermoforming, and device for carrying out this process
DE10327741A1 (en) * 2003-06-18 2005-01-13 Fagerdala Deutschland Gmbh Swiveling vehicle sun visor manufacture involves heating extruded polypropylene foam sheet to a specific temperature, press molding while applying vacuum and cutting shells from sheet
JP6493275B2 (en) * 2016-03-31 2019-04-03 東洋紡株式会社 Cavity-containing heat-shrinkable polyester film
DE102016120339A1 (en) * 2016-10-25 2018-04-26 Prominent Gmbh Process for the preparation of a shaped membrane

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH258231A (en) * 1946-04-13 1948-11-30 Durazzo Santos Paul Space heater.
US2642627A (en) * 1950-10-27 1953-06-23 Julius W Mann Method of heating the interior of plastic preforms
US3042972A (en) * 1960-06-24 1962-07-10 Koppers Co Inc Process of manufacturing articles having outer foamed portions
FR1549532A (en) * 1967-11-02 1968-12-13
BE775844A (en) * 1970-12-04 1972-05-26 Shell Int Research
US3979491A (en) * 1971-11-24 1976-09-07 Continental Can Company, Inc. Process for the manufacture of an oriented container
US4039609A (en) * 1972-10-25 1977-08-02 Bellaplast Gmbh Method for the manufacture of thin-walled shaped articles of thermoplastic material
DE2328368B2 (en) * 1973-06-04 1977-12-22 Bellaplast Gmbh, 6200 Wiesbaden THERMO FORMING DEVICE FOR THE PRODUCTION OF MOLDINGS OF LARGE DEPTH FROM A RELATIVELY THICK PLASTIC STRIP
DE2344866A1 (en) * 1973-09-06 1975-03-20 Bellaplast Gmbh METHOD AND DEVICE FOR MANUFACTURING MOLDINGS BY THERMOFORMING
DE2252219B2 (en) * 1972-10-25 1978-02-16 Bellaplast Gmbh, 6200 Wiesbaden METHOD AND DEVICE FOR PRODUCING THIN-WALLED MOLDINGS FROM THERMOPLASTIC PLASTIC
US3934743A (en) * 1972-12-29 1976-01-27 American Can Company Blow molded, oriented plastic bottle and method for making same
US3786221A (en) * 1973-03-29 1974-01-15 American Can Co Method for heat treating a polar, dielectric parison
CA1080416A (en) * 1974-10-31 1980-07-01 Robert P. Noonan Oriented containers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133188A1 (en) * 1983-08-05 1985-02-20 Brückner Maschinenbau Gernot Brückner GmbH & Co. KG Process and apparatus for producing a hot-formed plastic composite
WO1985002142A1 (en) * 1983-11-11 1985-05-23 A.A.R.C. (Management) Pty. Limited Molten thermoplastic web feeding process and apparatus

Also Published As

Publication number Publication date
ZA784183B (en) 1979-07-25
FR2398593B1 (en) 1984-04-13
ATA508778A (en) 1982-09-15
AT370671B (en) 1983-04-25
GB2001577B (en) 1982-01-13
SE7807756L (en) 1979-01-26
AT370672B (en) 1983-04-25
IT1097332B (en) 1985-08-31
BE869217A (en) 1979-01-24
SE423878B (en) 1982-06-14
IT7826035A0 (en) 1978-07-24
GB2001577A (en) 1979-02-07
GB2001576B (en) 1982-03-03
NL7807832A (en) 1979-01-29
IT1097331B (en) 1985-08-31
AR215724A1 (en) 1979-10-31
DE2830740C2 (en) 1985-11-07
FR2398592B1 (en) 1984-04-20
FR2398593A1 (en) 1979-02-23
CA1114125A (en) 1981-12-15
ATA508878A (en) 1982-09-15
ZA784184B (en) 1979-07-25
DE2830740A1 (en) 1979-02-15
FR2398592A1 (en) 1979-02-23
CA1114126A (en) 1981-12-15
DE2830788A1 (en) 1979-02-15
IT7826034A0 (en) 1978-07-24
ES471997A1 (en) 1979-02-16
NL7807831A (en) 1979-01-29
JPS5440870A (en) 1979-03-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee