GB650692A - Injection mold for use in molding opthalmic lenses and other articles - Google Patents

Injection mold for use in molding opthalmic lenses and other articles

Info

Publication number
GB650692A
GB650692A GB15957/47A GB1595747A GB650692A GB 650692 A GB650692 A GB 650692A GB 15957/47 A GB15957/47 A GB 15957/47A GB 1595747 A GB1595747 A GB 1595747A GB 650692 A GB650692 A GB 650692A
Authority
GB
United Kingdom
Prior art keywords
block
pads
mould
articles
lenses
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
GB15957/47A
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.)
TEKSUN Inc
Original Assignee
TEKSUN 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 TEKSUN Inc filed Critical TEKSUN Inc
Publication of GB650692A publication Critical patent/GB650692A/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00038—Production of contact lenses
    • B29D11/00125—Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere
    • 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
    • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
    • 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
    • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
    • B29C2045/2679—Simultaneously producing different products
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

650,692. Injection-moulding lenses &c. TEKSUN, Inc. June 17, 1947, No. 15957. Convention date, Nov. 28, 1944. [Class 87 (ii)] Articles, such as lenses, having varying contours, are moulded in split moulds formed in mould blocks 10, 12. The lower block 10 has a rotatable die block 18 containing several (four) forming pads 29, each having a different shape, which may be rotated to co-oparate with any one of the corresponding fixed die pads 40 in the mould block 12. Thus, if four pads are used in each block, sixteen differently shaped articles may be made in four casting operations. The die block 18 is held against axial movement by an anchor block 181 and a shaft 20 which has a tapered part 21 to engage the block 18<SP>1</SP>. The block 18 is held against rotary movement by a bolt 52, Fig. 3, which engages in one of several (four) spaced holes 50 in the mould block 10. The mould cavity is formed between the pads by a raised surface 32, around each of the forming pads, which keeps the pads apart when the mould blocks are pressed together. Thermoplastic material may be injected through the sprue channel 45 and gates 46. The pads may be marked near their edges with a symbol indicating the dioptic power of the lens formed by the pads. Air escapes, during injection, between the faces of the mould blocks.
GB15957/47A 1944-11-28 1947-06-17 Injection mold for use in molding opthalmic lenses and other articles Expired GB650692A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US650692XA 1944-11-28 1944-11-28

Publications (1)

Publication Number Publication Date
GB650692A true GB650692A (en) 1951-02-28

Family

ID=22060124

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15957/47A Expired GB650692A (en) 1944-11-28 1947-06-17 Injection mold for use in molding opthalmic lenses and other articles

Country Status (1)

Country Link
GB (1) GB650692A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061619A2 (en) * 1981-03-31 1982-10-06 Firma Carl Zeiss Mould for the manufacture of pieces of thermoplastic material
GB2216842A (en) * 1988-03-26 1989-10-18 Ikeda Bussan Co Mold steel for foamed plastic molding
GB2219243A (en) * 1988-03-02 1989-12-06 Pilkington Visioncare Holdings Moulding different lenses having the same edge thickness
WO1997034752A1 (en) * 1996-03-18 1997-09-25 Novartis Ag Method of mutually positioning a pair of shaping-tool halves facing each other, and shaping tool for the manufacture of precision-made articles, in particular contact lenses
WO1999020455A2 (en) * 1997-10-21 1999-04-29 Novartis Ag Single mould alignment
EP1052075A2 (en) * 1999-05-05 2000-11-15 Johnson & Johnson Vision Care, Inc. Mold and molding machine for making ophthalmic devices
WO2012006637A1 (en) * 2010-07-09 2012-01-12 Pixeloptics, Inc. Mold for diffractive ophthalmic lens

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061619A2 (en) * 1981-03-31 1982-10-06 Firma Carl Zeiss Mould for the manufacture of pieces of thermoplastic material
EP0061619A3 (en) * 1981-03-31 1983-09-07 Firma Carl Zeiss Mould for the manufacture of pieces of thermoplastic material
GB2219243A (en) * 1988-03-02 1989-12-06 Pilkington Visioncare Holdings Moulding different lenses having the same edge thickness
GB2216842A (en) * 1988-03-26 1989-10-18 Ikeda Bussan Co Mold steel for foamed plastic molding
WO1997034752A1 (en) * 1996-03-18 1997-09-25 Novartis Ag Method of mutually positioning a pair of shaping-tool halves facing each other, and shaping tool for the manufacture of precision-made articles, in particular contact lenses
WO1999020455A3 (en) * 1997-10-21 1999-07-01 Novartis Ag Single mould alignment
WO1999020455A2 (en) * 1997-10-21 1999-04-29 Novartis Ag Single mould alignment
US6627124B1 (en) 1997-10-21 2003-09-30 Novartis Ag Single mould alignment
EP1052075A2 (en) * 1999-05-05 2000-11-15 Johnson & Johnson Vision Care, Inc. Mold and molding machine for making ophthalmic devices
EP1052075A3 (en) * 1999-05-05 2002-01-30 Johnson & Johnson Vision Care, Inc. Mold and molding machine for making ophthalmic devices
US6592356B1 (en) 1999-05-05 2003-07-15 Johnson & Johnson Vision Care, Inc. Mold, molding system and molding machine for making ophthalmic devices
SG114588A1 (en) * 1999-05-05 2005-09-28 Johnson & Johnson Vision Care Mold, molding system and molding machine for making ophthalmic devices
WO2012006637A1 (en) * 2010-07-09 2012-01-12 Pixeloptics, Inc. Mold for diffractive ophthalmic lens

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