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GB1447716A - Apparatus for and process of venting volatile mattter from viscous liquid - Google Patents

Apparatus for and process of venting volatile mattter from viscous liquid

Info

Publication number
GB1447716A
GB1447716A GB2976274A GB2976274A GB1447716A GB 1447716 A GB1447716 A GB 1447716A GB 2976274 A GB2976274 A GB 2976274A GB 2976274 A GB2976274 A GB 2976274A GB 1447716 A GB1447716 A GB 1447716A
Authority
GB
United Kingdom
Prior art keywords
tube
thermoplastics
screw
ethylene
flight
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
GB2976274A
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.)
DuPont Canada Inc
Original Assignee
DuPont Canada Inc
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 DuPont Canada Inc filed Critical DuPont Canada Inc
Publication of GB1447716A publication Critical patent/GB1447716A/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
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/763—Vent constructions, e.g. venting means avoiding melt escape
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing 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
    • B29C48/03—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
    • B29C48/04—Particle-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

1447716 Removing volatiles from extruded thermoplastics DU PONT OF CANADA Ltd 4 July 1974 [13 July 1973] 29762/74 Heading B1B [Also in Division B5] Volatile material from heat softened thermoplastics being extruded by a helical screw 23, is vented through a cylindrical tube 15 within which a screw flight rotates, both relative to the tube and to a shaft on which it is mounted, to return to the extruder any thermoplastics deposited in the tube or on the shaft. The outlet 18 of tube 15 may be connected to atmosphere either directly or via pressure control means, or to means for recovering the volatile material, and either or both the tube 15 and outlet 18 may have a heating or cooling jacket. The flight within the tube 15 may terminate at or beyond the inlet to tube 15, and the shaft of the flight may be stationary, or may also rotate either in a different direction to, or in the same direction as the flight but at a slower speed. The thermoplastics may be delivered to the location of the screw 23 at which venting occurs by further screws, or by a further part of the screw 23 or, as described, by gravity to the inlet of the screw 23, at a hopper 22 through the wall 21 of which the tube 15 extends into volatile matter accummulating at 26. The volatile material may comprise water in polyamide, or monomer, low molecular weight polymer, or solvent in thermoplastics obtained by polymerising unsaturated monomers in a solvent. The thermoplastics preferably comprises homopolymers of ethylene and copolymers of ethylene and higher olefins, containing up to 2.5% of volatile cyclohexane solvent, which is extruded through an underwater cutter to form pellets. The removal of the volatiles permits higher output, a more constant extrusion pressure to be obtained and a lower screw compression ratio to be employed e.g. 1:1, or preferably 2:1 to 2.4:1. The examples relate to the extrusion of homopolymers of ethylene, and co-polymers of ethylene and butene-1, polymerised in cyclohexane.
GB2976274A 1973-07-13 1974-07-04 Apparatus for and process of venting volatile mattter from viscous liquid Expired GB1447716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA176,437A CA1003608A (en) 1973-07-13 1973-07-13 Venting of volatile matter from viscous liquids

Publications (1)

Publication Number Publication Date
GB1447716A true GB1447716A (en) 1976-08-25

Family

ID=4097285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2976274A Expired GB1447716A (en) 1973-07-13 1974-07-04 Apparatus for and process of venting volatile mattter from viscous liquid

Country Status (6)

Country Link
JP (1) JPS5915296B2 (en)
CA (1) CA1003608A (en)
DE (1) DE2433702C2 (en)
FR (1) FR2236646B1 (en)
GB (1) GB1447716A (en)
IT (1) IT1017147B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114055662A (en) * 2021-11-12 2022-02-18 张松 Plastic granulation processing equipment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117548A (en) * 1977-11-30 1978-09-26 The French Oil Mill Machinery Company Screw vent
JPS60171122A (en) * 1984-02-15 1985-09-04 Mitsubishi Heavy Ind Ltd Deaerating device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA856137A (en) * 1970-11-17 E. Baker Warren Extruder output improvement
US1156096A (en) * 1913-03-26 1915-10-12 Rubber Regenerating Co Apparatus for treating plastic material.
BE548966A (en) * 1955-06-25 1900-01-01
GB838549A (en) * 1957-04-03 1960-06-22 James Mitchell And Son Improvements in or relating to extrusion apparatus
DE1166460B (en) * 1961-11-14 1964-03-26 Troester Maschf Paul Screw press with forced conveying in the feed zone
DE1201041B (en) * 1962-07-10 1965-09-16 Kloeckner Humboldt Deutz Ag Screw extruder for plastic masses, e.g. B. thermoplastics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114055662A (en) * 2021-11-12 2022-02-18 张松 Plastic granulation processing equipment
CN114055662B (en) * 2021-11-12 2024-03-29 安徽新邦新材料有限公司 Plastic granulation processing equipment

Also Published As

Publication number Publication date
FR2236646B1 (en) 1977-10-07
JPS5915296B2 (en) 1984-04-09
IT1017147B (en) 1977-07-20
FR2236646A1 (en) 1975-02-07
DE2433702C2 (en) 1984-11-22
DE2433702A1 (en) 1975-01-30
CA1003608A (en) 1977-01-18
JPS5039355A (en) 1975-04-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19940703