ES375621A1 - Method for manufacturing rotation-symmetric articles by centrifugal casting - Google Patents

Method for manufacturing rotation-symmetric articles by centrifugal casting

Info

Publication number
ES375621A1
ES375621A1 ES375621A ES375621A ES375621A1 ES 375621 A1 ES375621 A1 ES 375621A1 ES 375621 A ES375621 A ES 375621A ES 375621 A ES375621 A ES 375621A ES 375621 A1 ES375621 A1 ES 375621A1
Authority
ES
Spain
Prior art keywords
liquid
casting
cast
bearing
denser
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
ES375621A
Other languages
Spanish (es)
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.)
Czech Academy of Sciences CAS
Original Assignee
Czech Academy of Sciences CAS
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 Czech Academy of Sciences CAS filed Critical Czech Academy of Sciences CAS
Publication of ES375621A1 publication Critical patent/ES375621A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/04—Other methods of shaping glass by centrifuging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
    • B29C41/045—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry the axis being placed vertically, e.g. spin casting
    • 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
    • B29D11/00471—Production of simple or compound lenses made by rotational casting
    • 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)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Articles are centrifugally cast from liquid which, during the-rotation, contacts only fluid phases, one of which is a liquid of greater density than the casting liquid, any other fluid having a lower density. In the first embodiment (Fig. 1, not shown), the denser liquid (l 1 ) forms a bearing on shaping surface against which liquid (l 2 ) is cast the upper surface of (l 2 ) contacting a gas (g). In another embodiment (Figs. 4-7, 9, not shown), the liquid (l 2 ) is cast between a denser liquid (l 1 ) and a less dense liquid (l 3 ) and there may be an interface between (l 2 ) and (g). Casting of lenses and moulds therefor are exemplified. Casting liquids exemplified include monomers of styrene, methyl methacrylate, glycol and glycidyl methacrylate, diglycol diallyl dicarbonate, epoxy, &c. polymerizing during the casting, or plaster of Paris. The bottom bearing liquid may be concentrated solutions of salts e.g. sodium chloride, mercury, gallium, low-melting alloys &c. The upper bearing liquid may be paraffin oil, silicone oil, &c.
ES375621A 1969-01-20 1970-01-19 Method for manufacturing rotation-symmetric articles by centrifugal casting Expired ES375621A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS36669 1969-01-20

Publications (1)

Publication Number Publication Date
ES375621A1 true ES375621A1 (en) 1972-10-16

Family

ID=5335603

Family Applications (1)

Application Number Title Priority Date Filing Date
ES375621A Expired ES375621A1 (en) 1969-01-20 1970-01-19 Method for manufacturing rotation-symmetric articles by centrifugal casting

Country Status (9)

Country Link
US (1) US3691263A (en)
AT (1) AT320268B (en)
CH (1) CH512980A (en)
DE (1) DE2001764A1 (en)
ES (1) ES375621A1 (en)
FR (1) FR2028738A1 (en)
GB (1) GB1241155A (en)
NL (1) NL150365B (en)
ZA (1) ZA70366B (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948871A (en) * 1972-04-21 1976-04-06 George H. Butterfield And Son Composition for hard type contact lens with wettable surface
US4069280A (en) * 1972-10-20 1978-01-17 Kidder Raymond W Method of making plastic optical fibers
US4217124A (en) * 1973-12-18 1980-08-12 Stephen Wyden Method of forming conoid surfaces
US4208364A (en) * 1976-03-24 1980-06-17 Shepherd Thomas H Process for the production of contact lenses
US4165158A (en) * 1977-07-25 1979-08-21 American Optical Corporation Cast contact lenses and method for making same
US4459246A (en) * 1982-08-26 1984-07-10 Neefe Charles W Molding contact lenses using a directed stream of gas
US4416837A (en) * 1982-09-13 1983-11-22 Neefe Charles W Spin casting of contact lenses
US4636338A (en) * 1985-01-11 1987-01-13 Neefe Charles W Molding toric contact lenses using a directed stream of gas
CS260213B1 (en) * 1986-03-05 1988-12-15 Jiri Sulc Method of polymerization casting of articles especially lenses from hydrophilic gels and equipment for realization of this method
US4820038A (en) * 1986-08-14 1989-04-11 Coopervision, Inc. Hydrogel contact lens
CS272334B1 (en) * 1988-05-13 1991-01-15 Sulc Jiri Method of lenses rotating casting and equipment for realization of this method
CS272098B1 (en) * 1988-07-08 1991-01-15 Wichterle Otto Double-convex lens from synthetic three-dimensional polymer and method of its preparation
CA2009668A1 (en) 1989-02-16 1990-08-16 Ashok R. Thakrar Colored contact lenses and method of making same
US5096627A (en) * 1990-09-17 1992-03-17 Minnesota Mining And Manufacturing Company Method of molding optical recording drums
US5260001A (en) * 1992-08-03 1993-11-09 Bausch & Lomb Incorporated Spincasting process for producing a series of contact lenses having desired shapes
US5598233A (en) * 1994-08-18 1997-01-28 Harold A. Gell Soft contact lens with contamination indicator
US5785905A (en) * 1995-09-11 1998-07-28 Charles Chang Method of making lipstick samplers
US6254243B1 (en) 1999-10-12 2001-07-03 Walter A. Scrivens Composite polymeric reflectors
US6679605B2 (en) * 2000-05-22 2004-01-20 Medennium, Inc. Crystalline polymeric compositions for ophthalmic devices
US6533426B2 (en) * 2001-05-02 2003-03-18 The United States Of America As Represented By The Secretary Of The Air Force Method of centrifugally casting a parabolic membrane mirror having a shape-restorative force
US20040075039A1 (en) * 2002-08-16 2004-04-22 Dubey Dharmesh K. Molds for producing contact lenses
CN1720130A (en) * 2002-12-03 2006-01-11 皇家飞利浦电子股份有限公司 Manufacturing of lens elements
US8318055B2 (en) * 2007-08-21 2012-11-27 Johnson & Johnson Vision Care, Inc. Methods for formation of an ophthalmic lens precursor and lens
US8663538B2 (en) 2009-02-12 2014-03-04 Picolife Technologies, Llc Method of making a membrane for use with a flow control system for a micropump
US8771229B2 (en) 2011-12-01 2014-07-08 Picolife Technologies, Llc Cartridge system for delivery of medicament
US8790307B2 (en) 2011-12-01 2014-07-29 Picolife Technologies, Llc Drug delivery device and methods therefor
US10130759B2 (en) 2012-03-09 2018-11-20 Picolife Technologies, Llc Multi-ported drug delivery device having multi-reservoir cartridge system
US9883834B2 (en) 2012-04-16 2018-02-06 Farid Amirouche Medication delivery device with multi-reservoir cartridge system and related methods of use
US10245420B2 (en) 2012-06-26 2019-04-02 PicoLife Technologies Medicament distribution systems and related methods of use
EP3792046A1 (en) * 2019-09-12 2021-03-17 Technische Hochschule Wildau Method for producing asymmetric or aspheric lenses and light unit with such a produced lens

Also Published As

Publication number Publication date
FR2028738A1 (en) 1970-10-16
GB1241155A (en) 1971-07-28
CH512980A (en) 1971-09-30
NL150365B (en) 1976-08-16
ZA70366B (en) 1971-08-25
AT320268B (en) 1975-02-10
DE2001764A1 (en) 1970-09-03
US3691263A (en) 1972-09-12
NL7000791A (en) 1970-07-22

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