GB1450087A - Extruder screw - Google Patents

Extruder screw

Info

Publication number
GB1450087A
GB1450087A GB4653673A GB4653673A GB1450087A GB 1450087 A GB1450087 A GB 1450087A GB 4653673 A GB4653673 A GB 4653673A GB 4653673 A GB4653673 A GB 4653673A GB 1450087 A GB1450087 A GB 1450087A
Authority
GB
United Kingdom
Prior art keywords
thread
channel
screw
section
barrel
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
GB4653673A
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.)
Maillefer SA
Original Assignee
Maillefer 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 Maillefer SA filed Critical Maillefer SA
Publication of GB1450087A publication Critical patent/GB1450087A/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
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • 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
    • B29C48/505—Screws
    • B29C48/64—Screws with two or more threads
    • B29C48/65—Screws with two or more threads neighbouring threads or channels having different configurations, e.g. one thread being lower than its neighbouring thread
    • 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

1450087 Melt separation extruder screw MAILLEFER SA 5 Oct 1973 [9 Oct 1972] 46536/73 Heading B5A An extruder for thermoplastics, or elastomeric, material comprises a heated cylindrical barrel 1, containing a screw 3 having a delivery thread 2 extending throughout its length through feed, plasticising, decompression, and pumping zones 4, 5, 6 and 14, the plasticising zone being of progressively increasing through flow cross-section and comprising an additional thread 7 defining, with the delivery thread 2 downstream and upstream channels 8, 9, which are respectively of decreasing and increasing cross-section so that material powder, or granules, melted in the channel 8 is transferred over the thread 7 into the channel 9. The channel 8 is of a depth equal to that of the feed zone 4, but that of the channel 9 is greater and equal to that of the decompression zone. In the illustrated embodiment, the thread 7 may have the same, or a greater clearance from the barrel wall than the thread 2 and is of greater pitch than thread 2, which is of constant pitch, and from which it branches at its upstream and downstream ends. Venting of gas from the material may be effected, at atmospheric pressure or by suction, at a barrel opening or openings 13 and/or by vents 12 communicating with an upstream opening screw passage 11. The venting through the barrel opening 13 is facilitated by the compression of a conical screw section 10.
GB4653673A 1972-10-09 1973-10-05 Extruder screw Expired GB1450087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1471272A CH558714A (en) 1972-10-09 1972-10-09 SCREWS FOR THERMOPLASTES OR ELASTOMER EXTRUDERS.

Publications (1)

Publication Number Publication Date
GB1450087A true GB1450087A (en) 1976-09-22

Family

ID=4403213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4653673A Expired GB1450087A (en) 1972-10-09 1973-10-05 Extruder screw

Country Status (4)

Country Link
CH (1) CH558714A (en)
DE (1) DE2350674A1 (en)
FR (1) FR2201969B1 (en)
GB (1) GB1450087A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214126A (en) * 1987-12-30 1989-08-31 Toshiba Machine Co Ltd Injection mould screws
EP0456230A1 (en) * 1990-05-11 1991-11-13 Brabor S.R.L. Extrusion screw
AU627506B2 (en) * 1988-10-11 1992-08-27 Spirex Corporation Methods of injection molding and extruding wet hygroscopic ionomers
EP0900642A1 (en) * 1997-09-03 1999-03-10 WEINGARTNER MASCHINENBAU GESELLSCHAFT m.b.H. Multiple screw extruder, particularly twin screw extruder
CN107244055A (en) * 2017-07-21 2017-10-13 四川业峰塑业有限公司 A kind of production system of spiral noise-reduction pipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733970A (en) * 1985-09-09 1988-03-29 Sterling Extruder Corporation Extruder screw
FR2693400B1 (en) * 1992-07-10 1994-09-02 Scamia Laminating and continuous filtration assembly for materials such as polymers in a pasty, viscous or molten state, visco-elastic products, proteinaceous products.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445890A (en) * 1966-12-08 1969-05-27 Nrm Corp Two-stage extruder
US3650652A (en) * 1970-05-05 1972-03-21 Feed Screws Inc Apparatus for extruding plastic material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214126A (en) * 1987-12-30 1989-08-31 Toshiba Machine Co Ltd Injection mould screws
GB2214126B (en) * 1987-12-30 1991-10-23 Toshiba Machine Co Ltd Screws for use in vent type injection molding machines
AU627506B2 (en) * 1988-10-11 1992-08-27 Spirex Corporation Methods of injection molding and extruding wet hygroscopic ionomers
EP0456230A1 (en) * 1990-05-11 1991-11-13 Brabor S.R.L. Extrusion screw
EP0900642A1 (en) * 1997-09-03 1999-03-10 WEINGARTNER MASCHINENBAU GESELLSCHAFT m.b.H. Multiple screw extruder, particularly twin screw extruder
CN107244055A (en) * 2017-07-21 2017-10-13 四川业峰塑业有限公司 A kind of production system of spiral noise-reduction pipe
CN107244055B (en) * 2017-07-21 2023-08-29 四川业峰塑业有限公司 Production system of spiral noise reduction pipe

Also Published As

Publication number Publication date
FR2201969A1 (en) 1974-05-03
FR2201969B1 (en) 1976-06-18
DE2350674A1 (en) 1974-04-18
CH558714A (en) 1975-02-14

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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