JPS578119A - Molding method of plastic lens - Google Patents
Molding method of plastic lensInfo
- Publication number
- JPS578119A JPS578119A JP8212880A JP8212880A JPS578119A JP S578119 A JPS578119 A JP S578119A JP 8212880 A JP8212880 A JP 8212880A JP 8212880 A JP8212880 A JP 8212880A JP S578119 A JPS578119 A JP S578119A
- Authority
- JP
- Japan
- Prior art keywords
- plastic lens
- molds
- cavity
- supporting members
- gap
- 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.)
- Pending
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
- B29D11/0048—Moulds for lenses
- B29D11/00528—Consisting of two mould halves joined by an annular gasket
-
- 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
- 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
- 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)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
PURPOSE:To prevent the change in the thickness of a cavity and improve the dimensional resistance of a plastic lens, by a method wherein a cavity is sealed by using a sealing film, and the gap between molds is maintained by using gap supporting members. CONSTITUTION:Two disk-shaped molds 1 and 2 are arranged so that the surfaces 3 and 4 to form the surfaces of a plastic lens face to each other. Gap supporting members 5 are inserted to maintain the distance between the two surfaces 3 and 4 at a given value. A sealing tape 6 such as an adhesive tape is wound around the sides of the two molds 1 and 2 to contact them closely to each other and to seal a cavity 7. After a plastic material has hardened, the molds 1 and 2 and the sealing film 6 are removed. Moreover, after the gap supporting members 5 have been removed from the molded object, the peripheral part of the molded object is removed to obtain a plastic lens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8212880A JPS578119A (en) | 1980-06-19 | 1980-06-19 | Molding method of plastic lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8212880A JPS578119A (en) | 1980-06-19 | 1980-06-19 | Molding method of plastic lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS578119A true JPS578119A (en) | 1982-01-16 |
Family
ID=13765771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8212880A Pending JPS578119A (en) | 1980-06-19 | 1980-06-19 | Molding method of plastic lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS578119A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0293250A2 (en) * | 1987-05-29 | 1988-11-30 | Honda Giken Kogyo Kabushiki Kaisha | Method of manufacturing a plastic sheet and packing for use in the method |
-
1980
- 1980-06-19 JP JP8212880A patent/JPS578119A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0293250A2 (en) * | 1987-05-29 | 1988-11-30 | Honda Giken Kogyo Kabushiki Kaisha | Method of manufacturing a plastic sheet and packing for use in the method |
EP0293250A3 (en) * | 1987-05-29 | 1990-08-29 | Honda Giken Kogyo Kabushiki Kaisha | Method of manufacturing a plastic sheet and packing for use in the method |
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