GB770705A - Improvements in extruders for plastic material - Google Patents

Improvements in extruders for plastic material

Info

Publication number
GB770705A
GB770705A GB2617/55A GB261755A GB770705A GB 770705 A GB770705 A GB 770705A GB 2617/55 A GB2617/55 A GB 2617/55A GB 261755 A GB261755 A GB 261755A GB 770705 A GB770705 A GB 770705A
Authority
GB
United Kingdom
Prior art keywords
plunger
screw
plastic material
fed
receiving end
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
GB2617/55A
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.)
Uniroyal Inc
Original Assignee
United States Rubber Co
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 United States Rubber Co filed Critical United States Rubber Co
Publication of GB770705A publication Critical patent/GB770705A/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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2888—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules in band or in strip form, e.g. rubber strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
    • 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
    • B29C48/08—Flat, e.g. panels flexible, e.g. films

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

770,705. Pug-mills. UNITED STATES RUBBER CO. Jan. 28, 1955 [April 2, 1954], No. 2617/55. Class 86 [Also in Group V] An extruder comprises a multi-flight feed screw 23, Figs. 1 and 2, and a yieldable plunger 21 slidably mounted in a housing 34 in which is located the receiving end 22 of the screw. The plastic material to be extruded is fed in strip form 12 through a slot 24 in the plunger, and when a bank of the material accumulates between the lower end of the plunger and the receiving end of the screw the plunger rises against the resistance of springs 32. The bank is re-fed into the screw by downward movement of the plunger, this downward movement being limited by a plate 38. The plunger and its guides 62 are made of a material, e.g. polytetrafluorethylene, which will not stick to the plastic material. The screw has one flight 39 at its receiving end (up to a point 40), and two flights 39, 41 from the point 40 to its discharge end. In modifications the material may be fed in strip or pellet form not through the plunger but through a passageway at one side thereof. The invention is described in connection with a cross-head extruder for coating an electrical conductor with plastic material.
GB2617/55A 1954-04-02 1955-01-28 Improvements in extruders for plastic material Expired GB770705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US770705XA 1954-04-02 1954-04-02

Publications (1)

Publication Number Publication Date
GB770705A true GB770705A (en) 1957-03-20

Family

ID=22135898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2617/55A Expired GB770705A (en) 1954-04-02 1955-01-28 Improvements in extruders for plastic material

Country Status (1)

Country Link
GB (1) GB770705A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2291831A (en) * 1994-08-03 1996-02-07 British Tech Group Int Extrusion and moulding apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2291831A (en) * 1994-08-03 1996-02-07 British Tech Group Int Extrusion and moulding apparatus and method
GB2291831B (en) * 1994-08-03 1997-06-18 British Tech Group Int Extrusion and moulding apparatus and method

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