JPS571731A - Manufacture of expanded plastic sheet - Google Patents

Manufacture of expanded plastic sheet

Info

Publication number
JPS571731A
JPS571731A JP7526880A JP7526880A JPS571731A JP S571731 A JPS571731 A JP S571731A JP 7526880 A JP7526880 A JP 7526880A JP 7526880 A JP7526880 A JP 7526880A JP S571731 A JPS571731 A JP S571731A
Authority
JP
Japan
Prior art keywords
sheet
flat die
extruder
plastic sheet
expanded
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.)
Pending
Application number
JP7526880A
Other languages
Japanese (ja)
Inventor
Takeshi Aragai
Takashi Nagai
Sadahito Kobori
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP7526880A priority Critical patent/JPS571731A/en
Publication of JPS571731A publication Critical patent/JPS571731A/en
Pending 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/505—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through a flat die

Landscapes

  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

PURPOSE:To obtain the captioned expanded sheet having no longitudinal wrinkle but a smooth surface and useful for a sheet packing or the like by a method wherein a forming plate having a cooling capacity is provided near a flat die at the tip end of an extruder to contact all over the surface of the form. CONSTITUTION:In a manufacturing method of the expanded plastic sheet wherein the flat die is employed at the tip end of the extruder, a pair of upper and lower forming plates 3, 3' having a cooling capacity are provided neighboring the flat die 1 interposing heat insulating plates 2, 2' between the die 1. A molten resin 41 containing an expanding agent is supplied to the flat die 1 from the extruder and is released from the opening part of the flat die 1 into the open air to form the expandable plastic sheet 42 while all over the surface of this sheet is contacted with the forming plates 3, 3', thereby obtaining the objective expanded sheet.
JP7526880A 1980-06-03 1980-06-03 Manufacture of expanded plastic sheet Pending JPS571731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7526880A JPS571731A (en) 1980-06-03 1980-06-03 Manufacture of expanded plastic sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7526880A JPS571731A (en) 1980-06-03 1980-06-03 Manufacture of expanded plastic sheet

Publications (1)

Publication Number Publication Date
JPS571731A true JPS571731A (en) 1982-01-06

Family

ID=13571301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7526880A Pending JPS571731A (en) 1980-06-03 1980-06-03 Manufacture of expanded plastic sheet

Country Status (1)

Country Link
JP (1) JPS571731A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6983788B2 (en) * 1998-11-09 2006-01-10 Building Performance Equipment, Inc. Ventilating system, heat exchanger and methods
US8162042B2 (en) 2007-01-22 2012-04-24 Building Performance Equipment, Inc. Energy recovery ventilator with condensate feedback

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6983788B2 (en) * 1998-11-09 2006-01-10 Building Performance Equipment, Inc. Ventilating system, heat exchanger and methods
US7334629B2 (en) 1998-11-09 2008-02-26 Building Performance Equipment Ventilating system, heat exchanger and methods
US7640662B2 (en) 1998-11-09 2010-01-05 Building Performance Equipment, Inc. Method of making heat exchangers
US8162042B2 (en) 2007-01-22 2012-04-24 Building Performance Equipment, Inc. Energy recovery ventilator with condensate feedback

Similar Documents

Publication Publication Date Title
BE878683A (en) PROCESS FOR PRODUCING AN INDIRECT HEAT EXCHANGE ELEMENT IN CERAMIC MATERIAL
JPS57110421A (en) Apparatus for molding long synthetic resin plate or sheet
EP0300521A3 (en) Method and apparatus for ptp pocket formation
EP0051570A3 (en) Process for the production of a continuous sheet of foamed synthetic, thermoplastic polymer by extrusion
JPS55118837A (en) Manufacture of polystyrene beed foam molded article having outer layer
ES553079A0 (en) A DEVICE TO MOLD AN ARTICLE FROM PREFORMED MATERIAL
JPS5515861A (en) Multi-layer hollow body and manufacturing method
DE69511220D1 (en) Process for making structural heat insulating articles
JPS57167212A (en) Manufacture of resin molding
JPS5727738A (en) Manufacture of air bag
JPS56149199A (en) Forming method of diaphragm for speaker
JPS557451A (en) Production of polypropylene sheet
JPS5779053A (en) Method and device for production of quick cooled material of melt
JPS57115314A (en) Manufacture for product formed as one body equipped partially with different materials
JPS5443961A (en) Manufacture of synthetic resin tile
JPS578129A (en) Manufacture of heat insulating box
JPS5555835A (en) Thermoplastic resin foam material and its manufacturing process
JPS57150520A (en) Forming apparatus of formed carpet for vehicle
JPS571729A (en) Manufacture of expanded thermoplastic resin
SU1135652A1 (en) Void former
JPS56102312A (en) Hot extruding method for metallic material
JPS537881A (en) Process and apparatus of releasing mold for heat moled corrugated cardboard
JPS5729431A (en) Manufacture of decorative sheet of synthetic resin
JPS5731531A (en) Molding of box-shaped product
JPS5698128A (en) Manufacture of thermoplastic resin box