GB1139212A - Improvements in screw-type extruding machines - Google Patents

Improvements in screw-type extruding machines

Info

Publication number
GB1139212A
GB1139212A GB49561/64A GB4956164A GB1139212A GB 1139212 A GB1139212 A GB 1139212A GB 49561/64 A GB49561/64 A GB 49561/64A GB 4956164 A GB4956164 A GB 4956164A GB 1139212 A GB1139212 A GB 1139212A
Authority
GB
United Kingdom
Prior art keywords
motor
valve
screw
control valve
pass
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
GB49561/64A
Inventor
Henry Hobhouse
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB49561/64A priority Critical patent/GB1139212A/en
Publication of GB1139212A publication Critical patent/GB1139212A/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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/38—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in the same barrel
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92085—Velocity
    • B29C2948/92095—Angular velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92085—Velocity
    • B29C2948/92104—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92314—Particular value claimed
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1,139,212. Extrusion moulding machines. H. HOBHOUSE. 28 Feb., 1966 [4 Dec., 1964], No. 49561/64. Heading B5A. In an extrusion moulding machine for extruding thermoplastic materials such as rubber, plastics, pharmaceutical preparations or foodstuffs, screw 4 is driven by an hydraulic motor 3 supplied with fluid from a pump 2 via a flow control valve 5, the exhaust fluid from motor 3 passing to a motor 9 via a control valve 7. Motor 9 drives a feed-screw 10 within hopper 17 and the exhaust fluid therefrom passes to a reservoir 1 via a control valve 12. A further control valve 13 connected to fluid delivered to motor 3 by means of conduit 14, controls the exhaust fluid from motor 9 by communicating with valve 12 and also communicates both with a recirculation port in hopper 17 and the extrusion barrel by means of a by-pass 16. Initially control valve 13 is inoperative and by-pass 16 is closed, the exhaust from motor 3 flowing freely along conduits 6, 8 and 11 to reservoir 1. As material is fed to screw 4 resistance to its movement increases and pressure in conduit 15 is likewise increased until at a predetermined value valve 13 and by-pass 16 are opened. With valve 13 open, valve 12 is controlled in such a way, and hence the exhaust fluid from motor 9, that as pressure in conduit 15 increases the speed of motor 9 decreases and vice versa. Further, regulation depending on the condition of the material is provided by a thermocouple 19 which controls displacement of pump 2 and hence speed of rotation of motor 3 by a link including a signal amplifier 20 and an actuator 21. A valve 18 may relate delivery by motor 9 and screw 10 to output of screw 4 and also maintain a positive pressure of delivered material in hopper 17. In a second embodiment, Fig. 2 (not shown), feed to screw 4 is controlled by the condition of the extruded material, e.g. shear strength, tensile strength or viscosity. By-pass 16 and thermocouple 19 are dispensed with, and a take-off device (23) feeds the extrudate to a sensing device (24) which may be linked by a conduit (25) to provide a biasing action on valve (5) or alternatively control pump (2) via a signal amplifier and actuator. In particular, device (24) may comprise a rotary chopper to determine the shear strength of, for example, animal foodstuffs. The use of the machine for injection moulding is also mentioned when during mould filling, by-pass 16, Fig. 1, is interrupted, output from pump 2 is adjusted to a maximum and control valve 5 is by-passed. Either valve 13 is adjusted to determine the maximum pressure required for injection or, alternatively, line 14 is interrupted by a valve 22. The speed of screw 4 may be boosted by incorporating a fluid pressure accumulator.
GB49561/64A 1964-12-04 1964-12-04 Improvements in screw-type extruding machines Expired GB1139212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB49561/64A GB1139212A (en) 1964-12-04 1964-12-04 Improvements in screw-type extruding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB49561/64A GB1139212A (en) 1964-12-04 1964-12-04 Improvements in screw-type extruding machines

Publications (1)

Publication Number Publication Date
GB1139212A true GB1139212A (en) 1969-01-08

Family

ID=10452742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49561/64A Expired GB1139212A (en) 1964-12-04 1964-12-04 Improvements in screw-type extruding machines

Country Status (1)

Country Link
GB (1) GB1139212A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425931A1 (en) * 1978-05-20 1979-12-14 Emi Electrola Gmbh ARRANGEMENT FOR THE EXTRUSION OF PLASTIC MATERIALS
FR2453014A1 (en) * 1979-04-05 1980-10-31 Sekisui Chemical Co Ltd PROCESS FOR EXTRUDING AND FORMING A THERMOPLASTIC MATERIAL
EP0048819A2 (en) * 1980-09-25 1982-04-07 Paul Troester Maschinenfabrik Apparatus for extruding strands from rubber elastomers and/or plastics
WO2001003900A1 (en) * 1999-07-08 2001-01-18 Societe Des Produits Nestle S.A. Extrusion die plate and cutter assembly with hydraulic motor
US7037095B1 (en) 1999-07-08 2006-05-02 Nestec S.A. Extrusion die plate and cutter assembly with hydraulic motor
US7290999B2 (en) 2002-03-21 2007-11-06 Nestec S.A. Extrusion die plate and cutter assembly with hydraulic motor
WO2009146501A1 (en) * 2008-06-04 2009-12-10 Ceramic Fuel Cells Limited Reactor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425931A1 (en) * 1978-05-20 1979-12-14 Emi Electrola Gmbh ARRANGEMENT FOR THE EXTRUSION OF PLASTIC MATERIALS
FR2453014A1 (en) * 1979-04-05 1980-10-31 Sekisui Chemical Co Ltd PROCESS FOR EXTRUDING AND FORMING A THERMOPLASTIC MATERIAL
EP0048819A2 (en) * 1980-09-25 1982-04-07 Paul Troester Maschinenfabrik Apparatus for extruding strands from rubber elastomers and/or plastics
EP0048819A3 (en) * 1980-09-25 1983-01-19 Paul Troester Maschinenfabrik Apparatus for extruding strands from rubber elastomers and/or plastics
WO2001003900A1 (en) * 1999-07-08 2001-01-18 Societe Des Produits Nestle S.A. Extrusion die plate and cutter assembly with hydraulic motor
US7037095B1 (en) 1999-07-08 2006-05-02 Nestec S.A. Extrusion die plate and cutter assembly with hydraulic motor
US7290999B2 (en) 2002-03-21 2007-11-06 Nestec S.A. Extrusion die plate and cutter assembly with hydraulic motor
WO2009146501A1 (en) * 2008-06-04 2009-12-10 Ceramic Fuel Cells Limited Reactor
US8980182B2 (en) 2008-06-04 2015-03-17 Bk Giulini Gmbh Reactor control

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