CH278509A - Process for the production of adhesive glasses intended for the correction of abnormal eyes. - Google Patents
Process for the production of adhesive glasses intended for the correction of abnormal eyes.Info
- Publication number
- CH278509A CH278509A CH278509DA CH278509A CH 278509 A CH278509 A CH 278509A CH 278509D A CH278509D A CH 278509DA CH 278509 A CH278509 A CH 278509A
- Authority
- CH
- Switzerland
- Prior art keywords
- glass
- mold
- adhesive
- correction
- under pressure
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
- C03B19/025—Other methods of shaping glass by casting molten glass, e.g. injection moulding by injection moulding, e.g. extrusion
-
- 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
- B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/71—Injecting molten glass into the mould cavity
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Verfahren zum'Herstellen von zur Korrektur von anormalen Augen bestimmten Haftgläsern.
Es s ist bekannt, STlaskörpern durch Pressen ihre Form zu geben. Die Formgebung erfolgt dadurch, dass man die erforderliche Glasmenge in die äussere Formhälfte einführt und dann mit der innern Formhälfte anpresst. Infolge der Abschreckung des Glases weist seine Oberfläche meist eine etwas rauhe und ruil- zelige Form auf, welche eine zeitraubende Nachbearbeitung bedingt. Uni die Oberfläche des Presslings zu vergüten, wird dieser bekanntlich entweder einer nachträg- lichen WS'ärmebehandlung unterzogen oder im kalten Zustande poliert.
Bekanntlich hat man versucht, in dieser WNTeise Haftgläser herzustellen: man war dabei gezwungen, einen grossen Fabrikationsausscbuss in Kauf zu nehmen. Nach einem andern bekannten Verfahren bläst man Glas in Formen. Die Glas masse wird dabei vor dem Blasvorgang erwärmt und schmiegt sich unter der Einwirkung von Pressluft in die Form. Der Prüfling wird nach dein Herausnehmen aus der Form nicht nachgearheitet. Beide genannten Verfahren besitzen den Nachteil eines m grossen Zeitaufwandes.
JVie herausgefunden wurde, gelingt es mit dem erfindungsgemässen Verfahren, den ge nannten Nachteil zu beheben. Erfindungs gemäss wird eine aus einer Xlatrize und aus einem Stempel bestehende Spritzform verwendet, wobei in den von diesen Teilen gebildeuten, der Haftglasform entsprechenden Hohlraum flüssiges Glas unter Druelr eingespritzt wird. Da die Haftgläser optische Klarheit und Genauigkeit besitzen müssen, schien es zuerst, als ob das erfindungsgemässe Fabrikationsverfahren mit Rücksicht auf den zu erwartenden grossen Fabrikationsaussehuss unwirtschaftlich sei.
Die Untersuchungen des Erfinders haben aber ergeben, dass dieses Vorurteil ungerecht- fertigt war.
Beiliegende Zeichnung veranschaulicht ein Ausführungisbeispiel der Vorrichtung zur Durchführung des erfindungsgemässen Verfahrens, und zwar zeigt sie eine Spritzform, sehematiseh und im Querschnitt. Die : Matrize 1 und der Stempel 2 bilden eine Hohlform, in die das in der Kammer 3 durch Erwärmen auf 2000C verflüssigte Glas, zum Beispiel transparenter Kunstharzpressstoff oder gewöhnliehes Glas, nach dem Öffnen des Hahnens 4 unter Druck eingespritzt wird. Nach dem Abkühlen des so entstandenen Spritzteils auf weniger wie 100o C wird dieser aus der Form herausgenommen. Das Abnehmen des Spritzgrates ist der letzte Arbeitsgang bei der Herstellung des Haftglases.
PATENTANSPRUCH:
Verfahren zur Herstellung von zur Kor rektur von anormalen Augen bestimmten Haftgläsern, dadurch gekennzeichnet, dass eine aus einer Matrize und aus einem. Stempel bestehende Spritzform verwendet wird, wobei in den von diesen Teilen gebildeten, der Haftglasform entsprechenden hohlraum flüssiges Glas unter Druck eingespritzt wird.
**WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**.
Process for the manufacture of adhesive glasses intended for the correction of abnormal eyes.
It is known to give glass bodies their shape by pressing. Shaping takes place by introducing the required amount of glass into the outer mold half and then pressing it with the inner mold half. As a result of the quenching of the glass, its surface usually has a somewhat rough and wrinkled shape, which requires time-consuming post-processing. In order to treat the surface of the pellet, it is known that it is either subjected to a subsequent thermal treatment or polished in the cold state.
It is well known that attempts have been made to manufacture adhesive glasses in this wintertime: one was forced to accept a large manufacturing committee. Another known method is to blow glass into molds. The glass mass is heated before the blowing process and nestles into the mold under the influence of compressed air. The test item is not remedied after being removed from the mold. Both of these methods have the disadvantage that they are time consuming.
As has been found, the method according to the invention succeeds in eliminating the disadvantage mentioned. According to the invention an injection mold consisting of an Xlatrize and a stamp is used, with liquid glass being injected under pressure into the cavity formed by these parts and corresponding to the adhesive glass mold. Since the adhesive glasses must have optical clarity and accuracy, it initially appeared as if the manufacturing method according to the invention was uneconomical with regard to the large manufacturing committee to be expected.
However, the inventor's investigations have shown that this prejudice was unjustified.
The accompanying drawing illustrates an exemplary embodiment of the device for carrying out the method according to the invention, namely it shows an injection mold, both in perspective and in cross section. The: die 1 and the punch 2 form a hollow shape into which the glass liquefied in the chamber 3 by heating to 200C, for example transparent synthetic resin molding or ordinary glass, is injected under pressure after opening the tap 4. After the molded part has cooled down to less than 100o C, it is removed from the mold. Removing the spray burr is the last step in the production of the adhesive glass.
PATENT CLAIM:
Process for the production of adhesive glasses intended for correction of abnormal eyes, characterized in that one of a die and one. Stamp existing injection mold is used, wherein liquid glass is injected under pressure into the cavity formed by these parts, corresponding to the adhesive glass mold.
** WARNING ** End of DESC field could overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE278509X | 1949-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH278509A true CH278509A (en) | 1951-10-31 |
Family
ID=6028521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH278509D CH278509A (en) | 1949-03-28 | 1950-03-08 | Process for the production of adhesive glasses intended for the correction of abnormal eyes. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH278509A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4184835A (en) * | 1978-09-28 | 1980-01-22 | General Electric Company | Mold apparatus |
-
1950
- 1950-03-08 CH CH278509D patent/CH278509A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4184835A (en) * | 1978-09-28 | 1980-01-22 | General Electric Company | Mold apparatus |
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