GB1243285A – Extrusion of resins
– Google Patents
GB1243285A – Extrusion of resins
– Google Patents
Extrusion of resins
Info
Publication number
GB1243285A
GB1243285A
GB2412/69A
GB241269A
GB1243285A
GB 1243285 A
GB1243285 A
GB 1243285A
GB 2412/69 A
GB2412/69 A
GB 2412/69A
GB 241269 A
GB241269 A
GB 241269A
GB 1243285 A
GB1243285 A
GB 1243285A
Authority
GB
United Kingdom
Prior art keywords
channels
cooled
screw
tubes
pieces
Prior art date
1969-01-15
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
GB2412/69A
Inventor
Stanley John Skinner
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals 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.)
1969-01-15
Filing date
1969-01-15
Publication date
1971-08-18
1969-01-15
Application filed by Monsanto Chemicals Ltd
filed
Critical
Monsanto Chemicals Ltd
1969-01-15
Priority to GB2412/69A
priority
Critical
patent/GB1243285A/en
1971-08-18
Publication of GB1243285A
publication
Critical
patent/GB1243285A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B29C44/3442—Mixing, kneading or conveying the foamable 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
B29C48/25—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
B29C48/03—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
Abstract
1,243,285. Cooling expandable materials during extrusion. MONSANTO CHEMICALS Ltd. 9 Dec., 1969 [15 Jan., 1969], No. 2412/69. Heading B5A. [Also in Division B1] Screw-extruded polystyrene, expanded by 8% by weight of methyl chloride, is cooled between the end of the screw and the die by passage through a plurality of cylindrical channels, e.g. 17, 18, cooled by a fluid, e.g. stream, and the product of the length and perimeter of each whereof is at least 50 times its area of crosssection, and with the total area of all the channels being at least half the cross-sectional area of the extruder barrel enclosing the screw. The channels may comprise holes drilled through a block of aluminium, steel, copper, or brass which is cooled by a surrounding fluid, but in the preferred embodiment the channels comprise tubes 17, 18 of these materials fixed between end-pieces 19, 20 which are strengthened by a central thicker walled tube 21 and located within a body 1 by body pieces 5 and 7, respectively, fixing to the extruder barrel and die. The location with the body piece 7 is sealed with an annealed copper gasket 14, and with the body piece 5 provision is made by a clearance 24 for the differential expansion of the tubes, with sealing effected by surrounding rings 22 and 23 of cast iron and polytetrafluoroethylene. The end pieces 19, 20 are supported against the compressive effect of extrusion pressure by a pair of bridging semi-cylindrical exterior shells 2, 3, through which the cooling fluid passes at 15 and 16 to circulate around the exterior of the tubes 17, 18.
GB2412/69A
1969-01-15
1969-01-15
Extrusion of resins
Expired
GB1243285A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB2412/69A
GB1243285A
(en)
1969-01-15
1969-01-15
Extrusion of resins
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB2412/69A
GB1243285A
(en)
1969-01-15
1969-01-15
Extrusion of resins
Publications (1)
Publication Number
Publication Date
GB1243285A
true
GB1243285A
(en)
1971-08-18
Family
ID=9739108
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2412/69A
Expired
GB1243285A
(en)
1969-01-15
1969-01-15
Extrusion of resins
Country Status (1)
Country
Link
GB
(1)
GB1243285A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2418074A1
(en)
*
1978-02-23
1979-09-21
Lavorazione Mat Plast
SCREW EXTRUDER FOR THERMOPLASTIC SYNTHETIC FOAMS
US4244903A
(en)
*
1976-10-22
1981-01-13
Rolf Schnause
Manufacture of flowable composite particulate material
1969
1969-01-15
GB
GB2412/69A
patent/GB1243285A/en
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4244903A
(en)
*
1976-10-22
1981-01-13
Rolf Schnause
Manufacture of flowable composite particulate material
FR2418074A1
(en)
*
1978-02-23
1979-09-21
Lavorazione Mat Plast
SCREW EXTRUDER FOR THERMOPLASTIC SYNTHETIC FOAMS
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