GB769104A - Improvements relating to injection molding - Google Patents

Improvements relating to injection molding

Info

Publication number
GB769104A
GB769104A GB21742/54A GB2174254A GB769104A GB 769104 A GB769104 A GB 769104A GB 21742/54 A GB21742/54 A GB 21742/54A GB 2174254 A GB2174254 A GB 2174254A GB 769104 A GB769104 A GB 769104A
Authority
GB
United Kingdom
Prior art keywords
heat
injection
moulding
mechanical working
screw
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
GB21742/54A
Inventor
James Watson Hendry
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.)
Tube Turns Plastics Inc
Original Assignee
Tube Turns Plastics 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 Tube Turns Plastics Inc filed Critical Tube Turns Plastics Inc
Priority to GB21742/54A priority Critical patent/GB769104A/en
Publication of GB769104A publication Critical patent/GB769104A/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
    • B29C45/72—Heating or cooling
    • 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
    • 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

Landscapes

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

Abstract

769,104. Injection-moulding. TUBE TURNS PLASTICS, Inc. July 26, 1954, No. 21742/54. Class 87(2). The temperature of portions of heat-plasticizable organic plastic material that are being fed successively to the injection cylinder of an injection-moulding machine is raised to the desired level by two operations, viz. (1) heat is applied continuously at a constant temperature from an external source this heat being insufficient to impart the desired plasticity to the material, and (2) further heat is applied to the material intermittently, by mechanical working of the material, this further increment of heat raising the material to the desired temperature. The intermittent mechanical working of the material occurs in sequence with the operation of the injection-moulding machine. Fig. 1 shows apparatus for carrying out the two heating operations, comprising a hopper 13 which feeds raw material to a chamber 10, heaters 12 which constitute the external source of heat, and an intermittently-rotated screw 11 which heats the material by mechanical working and feeds it to the injection-moulding machine. Fig. 3 shows apparatus having a modified screw comprising parts A, B and C. In an example describing the feeding of polystyrene having a moulding range of 400‹- 525‹F. by means of the Fig. 3 apparatus, the heaters 12 are set at 350‹F. At the discharge end of section A the polystyrene is at 325‹F., and passing through section C it is at 430‹F. The screw is stopped for 30-second periods during the operation of the injection ram, Fig. 2, (not shown). Specifications 684,582 and 711,875 are referred to.
GB21742/54A 1954-07-26 1954-07-26 Improvements relating to injection molding Expired GB769104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB21742/54A GB769104A (en) 1954-07-26 1954-07-26 Improvements relating to injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21742/54A GB769104A (en) 1954-07-26 1954-07-26 Improvements relating to injection molding

Publications (1)

Publication Number Publication Date
GB769104A true GB769104A (en) 1957-02-27

Family

ID=10168030

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21742/54A Expired GB769104A (en) 1954-07-26 1954-07-26 Improvements relating to injection molding

Country Status (1)

Country Link
GB (1) GB769104A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110549540A (en) * 2019-09-18 2019-12-10 南通卡瑞尼机电科技有限公司 Plastic part injection molding assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110549540A (en) * 2019-09-18 2019-12-10 南通卡瑞尼机电科技有限公司 Plastic part injection molding assembly

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