IE41886L - Manufacture of foamed thermoplastic - Google Patents

Manufacture of foamed thermoplastic

Info

Publication number
IE41886L
IE41886L IE751257A IE125775A IE41886L IE 41886 L IE41886 L IE 41886L IE 751257 A IE751257 A IE 751257A IE 125775 A IE125775 A IE 125775A IE 41886 L IE41886 L IE 41886L
Authority
IE
Ireland
Prior art keywords
section
temperature
cooling
die
extrudate
Prior art date
Application number
IE751257A
Other versions
IE41886B1 (en
Original Assignee
Charbonnages Ste Chimique
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 Charbonnages Ste Chimique filed Critical Charbonnages Ste Chimique
Publication of IE41886L publication Critical patent/IE41886L/en
Publication of IE41886B1 publication Critical patent/IE41886B1/en

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
    • B29C44/507—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 an annular 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
    • B29C48/07—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
    • B29C48/25—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
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • 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
    • B29C48/919—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
    • 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
    • B29C44/35—Component parts; Details or accessories
    • B29C44/352—Means for giving the foam different characteristics in different directions

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

1470267 Extruding longitudinally oriented foamed sections SOC CHIMIQUE DES CHARBONNAGES 3 June 1975 [5 June 1974] 23958/75 Heading B5A [Also in Division C3] A foamed thermoplastics section, having a ratio of density to that of the unfoamed material of 0À4 to 0À9, and which is oriented and has cells which are elongate, in the direction of the longitudinal axis of the section, is produced by extruding the thermoplastics containing the blowing agent at a temperature corresponding to the "rubbery flow" region, D, Fig. 1, cooling the extrudate around its periphery immediately at the outlet of the die and to a temperature of the "rubbery plateau", C, and drawing it through a metallic sizing die and a following cooling zone, with the extrusion and sizing die passages corresponding in shape and size to that of the section, and the ratio of extrusion speed to that at which the section is drawn from the sizing die corresponding to the density ratio of the section. The process requires an elongation of the order of 100% of the surface regions of the extrudate, obtained by the cooling to a temperature of the "rubbery plateau" of the material. For density ratios of 0À4 to 0À6, the temperature of the remainder of the extrudate may be that of the rubbery flow region, D. The peripheral cooling is preferably effected by jets of cold fluid directed at pressures which may be constant around the periphery in the case of a circular section rod, or may vary around the periphery, as in Specification 1,450,990, for sections such as that of the example, Fig. 2, where a specified foamable polystyrene homopolymer composition is extruded from the die P, and cooled by jets 1-7. The thermoplastics may also comprise polyvinyl chloride or polystyrene, or copolymers comprising one thereof. [GB1470267A]
IE1257/75A 1974-06-05 1975-06-04 A method of manufacture by extrusion of sections of structural foamed thermoplastics IE41886B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7419442A FR2273653A1 (en) 1974-06-05 1974-06-05 MANUFACTURING PROCESS BY EXTRUSION OF PROFILES IN LIGHT THERMOPLASTICS MATERIAL

Publications (2)

Publication Number Publication Date
IE41886L true IE41886L (en) 1975-12-05
IE41886B1 IE41886B1 (en) 1980-04-23

Family

ID=9139663

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1257/75A IE41886B1 (en) 1974-06-05 1975-06-04 A method of manufacture by extrusion of sections of structural foamed thermoplastics

Country Status (19)

Country Link
JP (1) JPS5130268A (en)
AR (1) AR202987A1 (en)
AU (1) AU8187375A (en)
BE (1) BE829551A (en)
BR (1) BR7503522A (en)
DD (1) DD118018A5 (en)
DE (1) DE2523277B2 (en)
DK (1) DK135618B (en)
ES (1) ES438262A1 (en)
FI (1) FI751649A (en)
FR (1) FR2273653A1 (en)
GB (1) GB1470267A (en)
IE (1) IE41886B1 (en)
IT (1) IT1035940B (en)
LU (1) LU72612A1 (en)
NL (1) NL7506630A (en)
NO (1) NO751928L (en)
SE (1) SE7506059L (en)
ZA (1) ZA753552B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1255465B (en) * 1992-07-28 1995-11-02 Tiziano Barea DEVICE TO CONTROL THE FEEDING OF AT LEAST ONE WIRE TO A TEXTILE MACHINE IN ORDER TO COMPENSATE FOR TEARS AND OVERVOLTAGES EXERCISED ON THE SAME WIRE

Also Published As

Publication number Publication date
DK135618B (en) 1977-05-31
AR202987A1 (en) 1975-07-31
ES438262A1 (en) 1977-01-01
NL7506630A (en) 1975-12-09
DK250775A (en) 1975-12-06
AU8187375A (en) 1976-12-09
IE41886B1 (en) 1980-04-23
FI751649A (en) 1975-12-06
BR7503522A (en) 1976-05-25
ZA753552B (en) 1976-04-28
LU72612A1 (en) 1976-03-17
BE829551A (en) 1975-11-27
DE2523277B2 (en) 1979-02-01
FR2273653B1 (en) 1979-05-25
NO751928L (en) 1975-12-08
IT1035940B (en) 1979-10-20
GB1470267A (en) 1977-04-14
FR2273653A1 (en) 1976-01-02
JPS5130268A (en) 1976-03-15
DE2523277A1 (en) 1975-12-18
SE7506059L (en) 1975-12-08
DD118018A5 (en) 1976-02-12
DK135618C (en) 1977-11-07

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