GB567877A - Improvements in or relating to method of and apparatus for molding plastic materials - Google Patents

Improvements in or relating to method of and apparatus for molding plastic materials

Info

Publication number
GB567877A
GB567877A GB541142A GB541142A GB567877A GB 567877 A GB567877 A GB 567877A GB 541142 A GB541142 A GB 541142A GB 541142 A GB541142 A GB 541142A GB 567877 A GB567877 A GB 567877A
Authority
GB
United Kingdom
Prior art keywords
nozzle
cylinder
heated
transformer
cooled
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
GB541142A
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.)
CLEMENT DWIGHT SHAW
WILLIAM BIGELOW HOEY
Original Assignee
CLEMENT DWIGHT SHAW
WILLIAM BIGELOW HOEY
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 CLEMENT DWIGHT SHAW, WILLIAM BIGELOW HOEY filed Critical CLEMENT DWIGHT SHAW
Priority to GB541142A priority Critical patent/GB567877A/en
Publication of GB567877A publication Critical patent/GB567877A/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
    • 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

Landscapes

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

Abstract

567,877. Electric heating. STEVENS, A. H. (Hoey, W. B., and McCurdy, E. D. [Representatives of Shaw, C. D.]). April 22, 1942, No. 54:11. [Class 39 (iii)] [Also in Group V] Thermosetting or thermoplastic material is injected at great speed from the cylinder into the mould through a nozzle which is heated while the material is passing therethrough, but is cooled when the mould has been filled. The nozzle is heated at a rate which is greater than the rate of heating of the mass in the cylinder and which, if applied to thermosetting material for a substantial length of time, would result in irreversible hardening of the material. Figs. 1 and 5 show an arrangement in which the nozzle 12 is electrically heated by two electrode elements 50 clamped thereon, each electrode element comprising a copper block connected by cables 51 to a, transformer 52. Each block is continuously cooled by water passing through a, passage 60. Just after the (water-cooled) plunger 5 begins its ejecting stroke, switch mechanism 70 cuts in the transformer, and during the stroke the nozzle is heated. As the stroke ends, the switch cuts out the transformer, which is not cut in again as the plunger recedes. Fig. 8 shows an arrangement in which a water-cooling jacket 64 surrounds the nozzle and an induction coil 66 surrounds the jacket. As the movable platen 24, carrying the moulded article or articles recedes to the right, springs 36 are compressed against the end of the platenmoving cylinder 25, and the moulded articles, carried on an undercut rod, are ejected. Material is continuously fed into the cylinder, from a hopper 2 and continuously ejected therefrom.
GB541142A 1942-04-22 1942-04-22 Improvements in or relating to method of and apparatus for molding plastic materials Expired GB567877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB541142A GB567877A (en) 1942-04-22 1942-04-22 Improvements in or relating to method of and apparatus for molding plastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB541142A GB567877A (en) 1942-04-22 1942-04-22 Improvements in or relating to method of and apparatus for molding plastic materials

Publications (1)

Publication Number Publication Date
GB567877A true GB567877A (en) 1945-03-07

Family

ID=9795675

Family Applications (1)

Application Number Title Priority Date Filing Date
GB541142A Expired GB567877A (en) 1942-04-22 1942-04-22 Improvements in or relating to method of and apparatus for molding plastic materials

Country Status (1)

Country Link
GB (1) GB567877A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116079999A (en) * 2023-01-07 2023-05-09 惠州市庆瑞祥精密部件有限公司 Injection molding machine with self-cooling injection molding machine head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116079999A (en) * 2023-01-07 2023-05-09 惠州市庆瑞祥精密部件有限公司 Injection molding machine with self-cooling injection molding machine head

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