IT1032811B - PROCEDURE AND DEVICE FOR THE FORMING OF OPTICAL LENSES - Google Patents

PROCEDURE AND DEVICE FOR THE FORMING OF OPTICAL LENSES

Info

Publication number
IT1032811B
IT1032811B IT68136/75A IT6813675A IT1032811B IT 1032811 B IT1032811 B IT 1032811B IT 68136/75 A IT68136/75 A IT 68136/75A IT 6813675 A IT6813675 A IT 6813675A IT 1032811 B IT1032811 B IT 1032811B
Authority
IT
Italy
Prior art keywords
reservoir
polymerization
cavity
mould
moulding
Prior art date
Application number
IT68136/75A
Other languages
Italian (it)
Original Assignee
Bausch & Lomb
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 Bausch & Lomb filed Critical Bausch & Lomb
Application granted granted Critical
Publication of IT1032811B publication Critical patent/IT1032811B/en

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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0888—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using transparant moulds
    • B29C35/0894—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using transparant moulds provided with masks or diaphragms
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/005—Compensating volume or shape change during moulding, in general
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/38—Moulds for making articles of definite length, i.e. discrete articles with means to avoid flashes
    • 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
    • B29D11/00057—Production of contact lenses characterised by the shape or surface condition of the edge, e.g. flashless, burrless, smooth
    • 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
    • B29D11/00432—Auxiliary operations, e.g. machines for filling the moulds
    • B29D11/00442—Curing the lens material
    • 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
    • B29D11/00932—Combined cutting and grinding thereof
    • B29D11/00942—Combined cutting and grinding thereof where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/76—Office equipment or accessories
    • B29L2031/7602—Maps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Eyeglasses (AREA)

Abstract

1511901 Moulding lenses BAUSCH & LOMB Inc 18 April 1975 [6 May 1974 8 April 1975] 16228/75 Heading B5A In the casting of lenses from material which changes volume on polymerization using a mould having a reservoir connected through a restriction to the moulding cavity, the mould cavity is completely filled and the reservoir at least partly filled with the polymerizable material, and the mould parts are configured to produce axial and/or radial alignment thereof. Preferably polymerization is inhibited in the reservoir during polymerization in the mould cavity so that material may pass to or from the cavity to compensate for any change in volume. In Fig. 3 a male member 13 is brought into contact with projections 131 on a female member 115 containing polymerizable material, thereby forming a mould cavity 133 and displacing excess material into an annular reservoir 135. The spaces between the projections 131 form part annular restrictions through which material can pass. The members 13 and 115 are made of glass to facilitate polymerization by U.V. irradiation through either of them. An annular shield 141 is used initially so that the centre is polymerized first, and finally the flash in the reservoir is polymerized. With certain cross-linking hydrophilic polymers the oxygen in the air inhibits polymerization and a nitrogen atmosphere is necessary during polymerization of the flash. In cases where a thermosetting material is heated to cure it both the initial expansion and the subsequent shrinkage of the material will be accommodated by the reservoir. In Fig. 7 the upper and lower female members 413, 15 are axially aligned with a very small clearance at 49 and 51. The viscosity of the moulding material and the weight of the upper member are chosen so that a thin film remains between the members 413, 15 to form a restricted connection 429 between the cavity 431 and the reservoir 433. The cured lens is machined by mounting the male member, with the lens still attached, on a lathe having a rotating fly cutter for generating the desired curvature.
IT68136/75A 1974-05-06 1975-05-05 PROCEDURE AND DEVICE FOR THE FORMING OF OPTICAL LENSES IT1032811B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46693374A 1974-05-06 1974-05-06
US56440375A 1975-04-08 1975-04-08

Publications (1)

Publication Number Publication Date
IT1032811B true IT1032811B (en) 1979-06-20

Family

ID=27041840

Family Applications (1)

Application Number Title Priority Date Filing Date
IT68136/75A IT1032811B (en) 1974-05-06 1975-05-05 PROCEDURE AND DEVICE FOR THE FORMING OF OPTICAL LENSES

Country Status (7)

Country Link
JP (1) JPS598219B2 (en)
CA (1) CA1070066A (en)
DE (1) DE2518905C2 (en)
FR (1) FR2270082B1 (en)
GB (1) GB1511901A (en)
IT (1) IT1032811B (en)
SE (1) SE418822B (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121896A (en) * 1976-03-24 1978-10-24 Shepherd Thomas H Apparatus for the production of contact lenses
JPS6030529B2 (en) * 1977-04-28 1985-07-17 日本コンタクトレンズ製造株式会社 Molding mold for manufacturing silicone resin contact lenses
US4155962A (en) * 1977-05-25 1979-05-22 Neefe Optical Laboratory, Inc. Method of removing molded lenses from the mold
US4165158A (en) * 1977-07-25 1979-08-21 American Optical Corporation Cast contact lenses and method for making same
DE2839249A1 (en) * 1977-09-12 1979-03-22 Toray Industries METHOD OF MANUFACTURING A SOFT CONTACT LENS AND OUTPUT SOLUTION FOR CARRYING OUT THE METHOD
IT1094754B (en) * 1978-05-12 1985-08-02 Italiana Lenti S I L S R L Soc PROCESS FOR THE MANUFACTURE BY CONTINUOUS COMPENSATION CASTING OF LENSES OR OPTICAL MEDIA IN POLYMERIZABLE SYNTHETIC RESINS
US4209289A (en) * 1979-05-14 1980-06-24 American Optical Corporation Contact lens mold
DE2938098C2 (en) * 1979-09-20 1983-02-03 Deutsche Spezialglas Ag, 3223 Delligsen Cast resin mixture for the production of plastic moldings with optical surface quality and their use
FR2477059A1 (en) * 1980-02-28 1981-09-04 Medicornea Sa METHOD OF MANUFACTURING BY MOLDING CONTACT LENSES AND LENSES OBTAINED
FR2477058A1 (en) * 1980-02-28 1981-09-04 Medicornea Sa METHOD OF MANUFACTURING BY MOLDING CONTACT LENSES, AND LENSES OBTAINED
NZ200362A (en) * 1981-04-30 1985-10-11 Mia Lens Prod A method of forming a hydrophilic polymer suitable for use in the manufacture of soft contact lenses and a mould for use in the polymerization
FR2523505A2 (en) * 1982-03-17 1983-09-23 Medicornea Sa IMPROVED PROCESS FOR THE MANUFACTURE, BY MOLDING, OF CONTACT LENSES AND IMPLEMENTING DEVICE
JPS6370619U (en) * 1986-10-29 1988-05-12
US4913857A (en) * 1987-04-03 1990-04-03 Kei Mori Method for molding a transparent capsule
JPH01258916A (en) * 1988-04-09 1989-10-16 Asahi Optical Co Ltd Casting mold for molding lens
JPH0214718U (en) * 1988-07-13 1990-01-30
ES2096846T3 (en) * 1988-11-02 1997-03-16 British Tech Group MOLDING AND CONTAINER CONTACT LENSES.
US5573108A (en) * 1988-11-02 1996-11-12 British Technology Group Ltd. Disposable contact lens package
US5271875A (en) * 1991-09-12 1993-12-21 Bausch & Lomb Incorporated Method for molding lenses
US5254000A (en) * 1992-04-23 1993-10-19 Corning Incorporated Organic polymer lens mold
DE19706846A1 (en) * 1997-02-21 1998-09-03 Bodenseewerk Geraetetech Device for light-initiated chemical crosslinking of material
JPH10315252A (en) * 1997-05-20 1998-12-02 Menicon Co Ltd Lens blank molding die and method of manufacturing contact lens
US6368522B1 (en) * 2000-01-03 2002-04-09 Johnson & Johnson Vision Care, Inc. Mold for forming a contact lens and method of preventing formation of small strands of contact lens material during contact lens manufacture
DE102009055080B4 (en) * 2009-12-21 2019-11-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method and device for producing a structure, molding tool
DE102009055088B4 (en) 2009-12-21 2015-04-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for producing a structure, optical component, optical layer stack
JP5558152B2 (en) * 2010-03-23 2014-07-23 京セラメディカル株式会社 Photografting lens and film forming apparatus
AU2012223582B2 (en) * 2011-02-28 2014-10-23 Coopervision International Limited Phosphine-containing hydrogel contact lenses
GB201302268D0 (en) * 2013-02-08 2013-03-27 Ocutec Ltd Molding Apparatus and Method
CN110341096B (en) * 2019-07-10 2020-12-25 苏州瑞尔康科技有限公司 50% water content contact lens molding die and manufacturing method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728106A (en) * 1950-09-08 1955-12-27 American Optical Corp Means for producing optical elements
US2890486A (en) * 1955-08-29 1959-06-16 American Optical Corp Mold for producing lens of any shape from a polymerizable material
GB847797A (en) * 1955-12-30 1960-09-14 Combined Optical Ind Ltd Improvements in or relating to the casting of synthetic resins
DE1945321A1 (en) * 1969-09-06 1971-03-11 Zeiss Carl Fa Optical components of duroplastic - synthetics

Also Published As

Publication number Publication date
SE7505165L (en) 1975-11-07
JPS598219B2 (en) 1984-02-23
SE418822B (en) 1981-06-29
DE2518905A1 (en) 1975-11-20
CA1070066A (en) 1980-01-22
FR2270082B1 (en) 1977-11-18
GB1511901A (en) 1978-05-24
JPS50151966A (en) 1975-12-06
FR2270082A1 (en) 1975-12-05
DE2518905C2 (en) 1984-10-04
AU8063175A (en) 1976-11-04

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