GB1102712A - Improvements in or relating to a mould assembly for use in the manufacture of optical products - Google Patents

Improvements in or relating to a mould assembly for use in the manufacture of optical products

Info

Publication number
GB1102712A
GB1102712A GB45517/63A GB4551763A GB1102712A GB 1102712 A GB1102712 A GB 1102712A GB 45517/63 A GB45517/63 A GB 45517/63A GB 4551763 A GB4551763 A GB 4551763A GB 1102712 A GB1102712 A GB 1102712A
Authority
GB
United Kingdom
Prior art keywords
ring
powder
anvil
disc
hot pressing
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
GB45517/63A
Inventor
John Rupert Davy
John Mckillop Ballantine
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.)
Thales Optronics Ltd
Original Assignee
Thales Optronics Ltd
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 Thales Optronics Ltd filed Critical Thales Optronics Ltd
Priority to GB45517/63A priority Critical patent/GB1102712A/en
Priority to DE19641442576 priority patent/DE1442576A1/en
Priority to DEB65388U priority patent/DE1938642U/en
Priority to NL6413320A priority patent/NL6413320A/xx
Priority to US635926A priority patent/US3364525A/en
Publication of GB1102712A publication Critical patent/GB1102712A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • C04B33/326—Burning methods under pressure
    • 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
    • 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
    • B29D11/00413—Production of simple or compound lenses made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/553—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on fluorides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/645—Pressure sintering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/02—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semi-conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/808—Lens mold

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Inorganic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Adornments (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Powder Metallurgy (AREA)

Abstract

1,102,712. Very high pressure apparatus. BARR & STROUD Ltd. 4 Nov.. 1964 [16 Nov., 1963], No. 45517/63. Heading B1X. [Also in Division B5] A pressure mould for use in hot pressing a powdered compound such as magnesium fluoride, zinc sulphide or zinc selenide to form a solid, polycrystalline optical element comprises a pair of opposed anvil blocks, and a powder container located for compression between the blocks and including a ring and a closure engaging an end of the ring, the ring and closure being composed of material which under hot pressing conditions is capable of plastic deformation, whereby during hot pressing of the mass of powder packed into the container, the closure beds sealingly against the ring end so that the packed powder is sealed within the container throughout the compression of the mass of powder, and in the event of variations in density throughout the packed mass of powder the container deforms in accordance with the variations, without loss of seal, to ensure uniform distribution of pressure throughout the mass of powder. In the moulding of an optical disc, powder X is hot pressed in a mould consisting of a pair of upper and lower steel anvil blocks 2, 3 with opposed horizontal flat-ground faces 2A, 3A, between which a mild steel rectangular-section ring 1 is disposed, with a mild steel disc 4 having a bevelled edge between the under face 2A of the anvil block 2 and the upper end of the ring. Layers 7, 8 of refractory powder, e.g. alumina layers, and flexible refractory sheets 9, 10, e.g. mica sheets, are provided on the opposed faces 4A, 3A of the disc 4 and anvil block 3, respectively, and a refractory powder layer 11 is provided between the anvil 2 and the disc 4. An induction heater has its coil 13 surrounding the ring 1 and the anvil blocks 2, 3, and an 80 ton hydraulic press receives the ring-and-anvil assembly between its platens. The alumina 'layers prevent adhesion during hot pressing and the mica sheets prevent the alumina powder from entering the powder X. Thick heat-insulating boards 14, 15 are provided between the anvil blocks 2, 3, and the press platens. During the hot pressing, the bevelled disc 4 expands the ring 1 uniformly to frustoconical shape and enters the ring 1 to compress the powder X uniformly. The optical disc with the ring 1 attached is removed from the mould after cooling and the ring removed by dissolving in dilute nitric acid. Moulds for the production of optical domes and curved windows are also described.
GB45517/63A 1963-11-16 1963-11-16 Improvements in or relating to a mould assembly for use in the manufacture of optical products Expired GB1102712A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB45517/63A GB1102712A (en) 1963-11-16 1963-11-16 Improvements in or relating to a mould assembly for use in the manufacture of optical products
DE19641442576 DE1442576A1 (en) 1963-11-16 1964-11-12 Press mold for the production of optical elements
DEB65388U DE1938642U (en) 1963-11-16 1964-11-12 PRESS FORM FOR MANUFACTURING OPTICAL ELEMENTS.
NL6413320A NL6413320A (en) 1963-11-16 1964-11-16
US635926A US3364525A (en) 1963-11-16 1967-05-03 Mold assembly for optical lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB45517/63A GB1102712A (en) 1963-11-16 1963-11-16 Improvements in or relating to a mould assembly for use in the manufacture of optical products

Publications (1)

Publication Number Publication Date
GB1102712A true GB1102712A (en) 1968-02-07

Family

ID=10437520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45517/63A Expired GB1102712A (en) 1963-11-16 1963-11-16 Improvements in or relating to a mould assembly for use in the manufacture of optical products

Country Status (4)

Country Link
US (1) US3364525A (en)
DE (2) DE1442576A1 (en)
GB (1) GB1102712A (en)
NL (1) NL6413320A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107634107A (en) * 2017-08-30 2018-01-26 常州豫春化工有限公司 A kind of preparation method for strengthening efficiency of light absorption type nano photovoltaic material

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2109470A5 (en) * 1970-10-19 1972-05-26 Silor
US4257988A (en) * 1978-09-12 1981-03-24 Optical Warehouse Showroom And Manufacturing, Inc. Method and assembly for molding optical lenses
US5415816A (en) 1986-01-28 1995-05-16 Q2100, Inc. Method for the production of plastic lenses
US5529728A (en) * 1986-01-28 1996-06-25 Q2100, Inc. Process for lens curing and coating
US6201037B1 (en) 1986-01-28 2001-03-13 Ophthalmic Research Group International, Inc. Plastic lens composition and method for the production thereof
US6730244B1 (en) 1986-01-28 2004-05-04 Q2100, Inc. Plastic lens and method for the production thereof
US4879318A (en) * 1986-01-28 1989-11-07 Ophthalmic Research Group International, Inc. Plastic lens composition and method for the production thereof
US5364256A (en) * 1986-01-28 1994-11-15 Ophthalmic Research Group International, Inc. Apparatus for the production of plastic lenses
US5514214A (en) * 1993-09-20 1996-05-07 Q2100, Inc. Eyeglass lens and mold spin coater
RU2083733C1 (en) * 1993-10-20 1997-07-10 Совместное предприятие "Амкрис-Эйч, Лтд." Method of manufacturing large-size polycrystalline plates from optical and scintillation materials
US6022498A (en) * 1996-04-19 2000-02-08 Q2100, Inc. Methods for eyeglass lens curing using ultraviolet light
US6280171B1 (en) 1996-06-14 2001-08-28 Q2100, Inc. El apparatus for eyeglass lens curing using ultraviolet light
US6190391B1 (en) * 1999-10-01 2001-02-20 Bristol-Myers Squibb Company Method of preparing a resected posterior surface of a patella to receive a prosthetic element
CN104591736B (en) * 2015-01-09 2016-09-21 中国科学院上海光学精密机械研究所 The manufacture method of saturating infrared ZnS trousers pottery

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292917A (en) * 1938-06-03 1942-08-11 Williams William Ewart Molding of plastic and other moldable materials
US2319014A (en) * 1940-08-31 1943-05-11 Univis Lens Co Method of molding
US3038210A (en) * 1955-06-06 1962-06-12 Parmelee Plastics Co Method of producing plastic lenses
US2913764A (en) * 1955-11-21 1959-11-24 American Brake Shoe Co Press for powdered metals
US3221365A (en) * 1962-12-14 1965-12-07 Bausch & Lomb Apparatus for forming optical elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107634107A (en) * 2017-08-30 2018-01-26 常州豫春化工有限公司 A kind of preparation method for strengthening efficiency of light absorption type nano photovoltaic material

Also Published As

Publication number Publication date
DE1442576A1 (en) 1969-03-06
DE1938642U (en) 1966-05-18
NL6413320A (en) 1965-11-25
US3364525A (en) 1968-01-23

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