GB1450990A - Method and apparatus for the manufacture of extrudates of structural foam thermoplastic material - Google Patents

Method and apparatus for the manufacture of extrudates of structural foam thermoplastic material

Info

Publication number
GB1450990A
GB1450990A GB1125274A GB1125274A GB1450990A GB 1450990 A GB1450990 A GB 1450990A GB 1125274 A GB1125274 A GB 1125274A GB 1125274 A GB1125274 A GB 1125274A GB 1450990 A GB1450990 A GB 1450990A
Authority
GB
United Kingdom
Prior art keywords
shape
fluid
die
extruded
section
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
GB1125274A
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.)
Orkem SA
Original Assignee
Chimique des Charbonnages 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 Chimique des Charbonnages SA filed Critical Chimique des Charbonnages SA
Publication of GB1450990A publication Critical patent/GB1450990A/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
    • 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
    • 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
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87—Cooling
    • 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
    • B29C48/90—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
    • B29C48/911—Cooling
    • 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
    • B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Die Bonding (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

1450990 Controlling dimensions of extruded foam SOC CHIMIQUE DES CHARBONNAGES 13 March 1974 [16 March 1973] 11252/74 Heading B5A [Also in Division C3] A thermoplastic polymer containing a foaming agent, is extruded to foam upon issuing from an extrusion die and, at the exit of the die, is differentially cooled around its periphery by fluid pressure jets to effect expansion differentially to a shape at least similar to that of the shape of a sizing die through which it passes, so that friction is reduced in drawing the shape through the sizing die. The sized shape is cooled in passage through water tanks. The fluid may comprise cold compressed air, e.g. at 20‹ C., or other gas, or a suspension of water in air. The differential cooling may be effected by differing pressure and/or temperature of the fluid. In Example (1), the polymer comprises high impact polystyrene containing polybutadiene foamed with zeolite, the extrusion die shape 1 being as shown in Fig. 3, or in Fig. 1 (not shown), and the sizing die shape being as shown in Fig. 2. The fluid cooling is effected by two (or four or eight) compressed air or water suspension blowing devices 3 and 4, each comprising one or more orifices, with the upper device 3 operating at a higher pressure than the lower device 4. Figs. 5 and 6 (not shown) show variations of shape effected by varying the fluid pressures. In Example (2), a similar high impact polystyrene foamed with azodicarbonamide is extruded from the Fig. 7 die shape, to produce a rectilinear sided "L"-section, the cooling fluid being directed at different pressures from three locations across the top of the extruded section, and locations at either side and at the bottom of the section. In Examples (3) and (4), crystal polystyrene, or rigid P.V.C., containing azodicarbonamide is extruded from the die 1a of Fig. 10, to produce a rectangular section, using upper and lower 3, 4, and opposite lateral fluid blowing devices operating at different pressures. Foam densities are stated. The differential cooling may produce a variable surface around the article comprising a smooth skin, a rough skin and/or the absence of a skin.
GB1125274A 1973-03-16 1974-03-13 Method and apparatus for the manufacture of extrudates of structural foam thermoplastic material Expired GB1450990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7309609A FR2221269B1 (en) 1973-03-16 1973-03-16

Publications (1)

Publication Number Publication Date
GB1450990A true GB1450990A (en) 1976-09-29

Family

ID=9116449

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1125274A Expired GB1450990A (en) 1973-03-16 1974-03-13 Method and apparatus for the manufacture of extrudates of structural foam thermoplastic material

Country Status (13)

Country Link
JP (1) JPS502765A (en)
BE (1) BE811998A (en)
DE (1) DE2412364C3 (en)
ES (1) ES424352A1 (en)
FR (1) FR2221269B1 (en)
GB (1) GB1450990A (en)
IE (1) IE39073B1 (en)
IN (1) IN140819B (en)
IT (1) IT1008429B (en)
LU (1) LU69613A1 (en)
NL (1) NL7403400A (en)
NO (1) NO143657C (en)
SE (1) SE401998B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5198356U (en) * 1975-02-05 1976-08-06
JPS58196490U (en) * 1982-06-25 1983-12-27 キヨ−ラク株式会社 plastic bulkhead duct
JPS59163284U (en) * 1983-04-18 1984-11-01 三菱電機株式会社 double layer pipe
CN104645657A (en) * 2013-11-15 2015-05-27 嘉兴市南洋塑料化工有限公司 System of reducing heating loss of methyl tetrahydrophthalic anhydride and method thereof

Also Published As

Publication number Publication date
FR2221269A1 (en) 1974-10-11
IN140819B (en) 1976-12-25
NO143657C (en) 1981-03-25
JPS502765A (en) 1975-01-13
NL7403400A (en) 1974-09-18
DE2412364B2 (en) 1980-03-27
FR2221269B1 (en) 1976-05-21
LU69613A1 (en) 1974-10-09
NO740903L (en) 1974-09-17
ES424352A1 (en) 1976-06-01
SE401998B (en) 1978-06-12
IT1008429B (en) 1976-11-10
DE2412364A1 (en) 1974-09-19
DE2412364C3 (en) 1980-11-27
NO143657B (en) 1980-12-15
IE39073B1 (en) 1978-08-02
BE811998A (en) 1974-09-09
IE39073L (en) 1974-09-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee