SU903164A1 - Mould for manufacturing contact lens by polymerization - Google Patents
Mould for manufacturing contact lens by polymerization Download PDFInfo
- Publication number
- SU903164A1 SU903164A1 SU802899148A SU2899148A SU903164A1 SU 903164 A1 SU903164 A1 SU 903164A1 SU 802899148 A SU802899148 A SU 802899148A SU 2899148 A SU2899148 A SU 2899148A SU 903164 A1 SU903164 A1 SU 903164A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- polymerization
- forming
- cavity
- mould
- contact lens
- Prior art date
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Изобретение относитс к устройствам дл переработки полимерных материалов в издели и может быть испольаовано дл изготовлени оптических элементов или изделий с одной или двум поверхност ми сферической формы.The invention relates to devices for processing polymeric materials into articles and can be used to manufacture optical elements or products with one or two spherical surfaces.
Известна форма дл изготовлени контактных линз полимеризацией, состо ща из двух элементов (матрицы и пуансона ) , образующих при смыкании полость г 1.The known form for the manufacture of contact lenses by polymerization, consisting of two elements (a matrix and a punch), which form a cavity g 1 when closed.
В полость формы перед смыканием помещают полимеризующуюс композицию, котора , отвержда сь, образует контактную линзу, Однако в данной форме трудно получить монолитные контактные линзы, так как в них не обеспечиваетс надежное удаление пузырьков воздуха и газообразных продуктов реакции из полимеризующейс массы ..Before the closure of the mold, the polymerizable composition is placed in the cavity, which cures to form a contact lens. However, it is difficult to obtain monolithic contact lenses in this form, since they do not reliably remove air bubbles and gaseous reaction products from the polymerizing mass.
Наиболее близким техническим решением к изобретению вл етс форма дл изготовлени контактных линз полимеризацией, содержаща обойму, размещенные в ней формующие элементы с оформл ющими поверхност ми, образующими формующую полость, сообщающуюс с внутренней кольцевой полостью обоймы посредством сужающегос канала 2.Формующа полость .окружена кольцевым резервуаром, который сообщаетс с полостью формы. Из резервуара осуществл етс подпитка полости формы материалом дл компенсации усадки. . .The closest technical solution to the invention is a mold for the manufacture of contact lenses by polymerization, comprising a holder, forming elements therein, with shaping surfaces forming a forming cavity, communicating with the inner annular cavity of the holder through a narrowing channel 2. The forming cavity is surrounded by an annular reservoir which communicates with the mold cavity. From the reservoir, the mold cavity is fed with material to compensate for shrinkage. . .
В известной форме газы, выдел ющиес из полимерной композиции в In a known form, the gases released from the polymer composition in
10 процессе полимеризации поднимаютс вверх и потом перемещаютс к кра м оформл ющей полости. При значительной ИСХОДНОЙ в зкости композиции или быстром увеличении в зкости при 10, the polymerization process rises upward and then moves to the edges of the decorating cavity. With a significant INITIAL viscosity of the composition or a rapid increase in viscosity with
15 полимеризации газовые включени перемещаютс к кра м оформл ющей полости очень медленно и поэтому могут оставатьс в линзе в виде пустот, что. приводит к браку.15 of the polymerization, gas inclusions move to the edges of the shaping cavity very slowly and therefore can remain in the lens in the form of voids that. leads to marriage.
2020
Цель и-зобретени - повышение качества изделий за счет улучшений удалени включений из композиций в процессе, полимеризации.The purpose of the invention is to improve the quality of products by improving the removal of inclusions from the compositions during the polymerization process.
Достигаетс это тем, что в форме, This is achieved by the fact that in the form
25 содержащей обойму, размещенные в ней формующие элементы с ;Оформл ю1цими поверхност ми, образующими формующую полость, сообщающуюс с внутренней кольцевой полостью обоймы пос30 оедством сужащегос канала,один из25 containing the cage, the forming elements housed therein; with the design of the surfaces forming the forming cavity, which communicates with the inner annular cage of the cage through 30 the narrowing channel, one of
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802899148A SU903164A1 (en) | 1980-03-26 | 1980-03-26 | Mould for manufacturing contact lens by polymerization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802899148A SU903164A1 (en) | 1980-03-26 | 1980-03-26 | Mould for manufacturing contact lens by polymerization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU903164A1 true SU903164A1 (en) | 1982-02-07 |
Family
ID=20884929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU802899148A SU903164A1 (en) | 1980-03-26 | 1980-03-26 | Mould for manufacturing contact lens by polymerization |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU903164A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755332A (en) * | 1985-04-12 | 1988-07-05 | Hitachi, Ltd. | Method of and apparatus for pelletizing radioactive waste powder |
| US5230910A (en) * | 1989-09-26 | 1993-07-27 | Henrich Eggert | Apparatus for the cold deep drawing of films |
-
1980
- 1980-03-26 SU SU802899148A patent/SU903164A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755332A (en) * | 1985-04-12 | 1988-07-05 | Hitachi, Ltd. | Method of and apparatus for pelletizing radioactive waste powder |
| US5230910A (en) * | 1989-09-26 | 1993-07-27 | Henrich Eggert | Apparatus for the cold deep drawing of films |
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