GB983281A - Improvements in moulding processes - Google Patents

Improvements in moulding processes

Info

Publication number
GB983281A
GB983281A GB20360A GB20360A GB983281A GB 983281 A GB983281 A GB 983281A GB 20360 A GB20360 A GB 20360A GB 20360 A GB20360 A GB 20360A GB 983281 A GB983281 A GB 983281A
Authority
GB
United Kingdom
Prior art keywords
mould
core
spew
epoxy resin
devices
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
GB20360A
Inventor
Cyril Daniel Watson
Thomas Jones
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB20360A priority Critical patent/GB983281A/en
Publication of GB983281A publication Critical patent/GB983281A/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
    • 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
    • B29C45/26—Moulds
    • B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

983,281. Moulding presses. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 29, 1961 [Jan. 4, 1960), No. 203/60. Heading B5A. An apparatus for moulding thermosetting materials, e.g. rubber or phenol formaldehyde resins, comprises a mould 2, a transfer chamber 1, communicating with the mould through a feed hole 12, to accommodate a charge of material at an elevated temperature, a piston (not shown) to force the material under high pressure (i.e. above 1000 1b./sq. inch) into the mould, and one or more spew devices 3 which operate when the mould is full to allow escape of excess material and prevent the pressure in the mould rising, e.g. to above 500 Ib./sq. inch. The spew devices 3 comprise a piston 10 movable against the action of a spring 11 to uncover vents 8 and 9 for the escape of the excess material. The spew devices are provided at the parts of the mould which are the last to be filled. The chamber 1 has ports 6, 7 for the introduction of the charge of material and the material may be cured with the mould in the position shown or in an oven. The mould 2 is made in two parts mounted on platens 3, 4 and may be constructed of an epoxy resin or cast aluminium faced with an epoxy resin. The epoxy resin mould may be made by casting a resin core in a core-box, the core then being coated with a hard wax of thickness equal to that of the required article. The outer mould is cast over the sheeted core, and finally the wax sheet is removed to leave the moulding space.
GB20360A 1960-01-04 1960-01-04 Improvements in moulding processes Expired GB983281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20360A GB983281A (en) 1960-01-04 1960-01-04 Improvements in moulding processes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20360A GB983281A (en) 1960-01-04 1960-01-04 Improvements in moulding processes

Publications (1)

Publication Number Publication Date
GB983281A true GB983281A (en) 1965-02-17

Family

ID=9700234

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20360A Expired GB983281A (en) 1960-01-04 1960-01-04 Improvements in moulding processes

Country Status (1)

Country Link
GB (1) GB983281A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212013A2 (en) * 1985-08-05 1987-03-04 Vernay Laboratories,Inc. Method for forming a molded elastomeric article

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212013A2 (en) * 1985-08-05 1987-03-04 Vernay Laboratories,Inc. Method for forming a molded elastomeric article
EP0212013A3 (en) * 1985-08-05 1988-03-16 Vernay Laboratories,Inc. Method for forming a molded elastomeric article

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