GB791557A - Improvements in and relating to screw conveyors for injection moulding machines - Google Patents

Improvements in and relating to screw conveyors for injection moulding machines

Info

Publication number
GB791557A
GB791557A GB1906955A GB1906955A GB791557A GB 791557 A GB791557 A GB 791557A GB 1906955 A GB1906955 A GB 1906955A GB 1906955 A GB1906955 A GB 1906955A GB 791557 A GB791557 A GB 791557A
Authority
GB
United Kingdom
Prior art keywords
chamber
screw
cylinder
slots
recess
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
GB1906955A
Inventor
Keith Herbert Baigent
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.)
RH Windsor Ltd
Original Assignee
RH Windsor 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.)
Filing date
Publication date
Application filed by RH Windsor Ltd filed Critical RH Windsor Ltd
Priority to GB1906955A priority Critical patent/GB791557A/en
Publication of GB791557A publication Critical patent/GB791557A/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C2045/5004—Axially movable screw the forward screw end provided with an injection ram

Landscapes

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

Abstract

791,557. Injection-moulding machines. WINDSOR, Ltd., R. H. June 22,1956 [July 1, 1955], No. 19069/55. Class 87(2). The conveyer screw 8 which rotates and reciprocates axially within the cylinder 4, 5, has an enlarged cylindrical piston head 8a the outer diameter of which is equal or substantially equal to the diameter of the screw threads. On the interior of the cylinder are slots 5b, Figs. 1 and 2, or an annular recess 5c, Fig. 3, the slots or recess being so located that when the screw is in its rearmost position, as shown, plasticised material that is being pushed forward by the rotating screw threads passes through the slots or recess into the forward chamber 10 of the cylinder. When the chamber 10 has been filled the screw advances to the left and the piston head 8a pushes material out of the chamber into the mould. A nozzle valve 12 is automatically opened and closed by means including a lever and link mechanism 13 and a hydraulic cylinder 14. A device 11 measures the pressure of the material in chamber 10. Specification 760,480 is referred to.
GB1906955A 1955-07-01 1955-07-01 Improvements in and relating to screw conveyors for injection moulding machines Expired GB791557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1906955A GB791557A (en) 1955-07-01 1955-07-01 Improvements in and relating to screw conveyors for injection moulding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1906955A GB791557A (en) 1955-07-01 1955-07-01 Improvements in and relating to screw conveyors for injection moulding machines

Publications (1)

Publication Number Publication Date
GB791557A true GB791557A (en) 1958-03-05

Family

ID=10123248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1906955A Expired GB791557A (en) 1955-07-01 1955-07-01 Improvements in and relating to screw conveyors for injection moulding machines

Country Status (1)

Country Link
GB (1) GB791557A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172161A (en) * 1962-08-20 1965-03-09 Trucblood Inc Plastic machines
GB2254283A (en) * 1991-03-26 1992-10-07 Frenkel Ag C D Improvements in plasticising units for screw injection moulding machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172161A (en) * 1962-08-20 1965-03-09 Trucblood Inc Plastic machines
GB2254283A (en) * 1991-03-26 1992-10-07 Frenkel Ag C D Improvements in plasticising units for screw injection moulding machines
GB2254283B (en) * 1991-03-26 1995-02-15 Frenkel Ag C D Improvements in plasticising units for screw injection moulding machines

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