SI20742A

SI20742A - Procedure of low-cost manufacturing of moulds for unique specimen from blown glass

Info

Publication number: SI20742A
Application number: SI200000222A
Authority: SI
Inventors: Dušan Pirc
Original assignee: Pirc Dušan, inž. stroj.
Priority date: 2000-09-11
Filing date: 2000-09-11
Publication date: 2002-06-30

Abstract

The procedure of low-cost manufacturing of moulds for unique specimen from cast or blown glass uses a positive made from a material with a considerably lower melting point compared to the mollification point of glass. The specified positive is coated by a protective coating. Then it is necessary to wait until it gets harder, when such a coated positive is placed into a steel frame and the unused space is filled up with quartz sand, Furano pitch and paratoloulsulphonic acid. After the specified mixture turns solid, everything is placed in a furnace and heated to the appropriate temperature, high enough that the positive melts and runs off. This way the mould is completed. After casting and hardening of glass the mould turns to dust.

Description

POSTOPEK CENENE IZDELAVE KALUPOV ZA UNIKATNE ULITE ALI PIHANE STEKLENE IZDELKEPROCEDURE FOR THE PRICED MAKING OF MOLDINGS FOR UNIQUE INVOLVED OR BREATHED GLASS PRODUCTS

Področje tehnikeThe field of technology

Po MPK spada izum v razred C03B 19/02.According to the MPK, the invention belongs to class C03B 19/02.

-2-2Tehniški problem-2-2Technical Problem

Izum rešuje tehniški problem izdelave takšnega postopka izdelave kalupov za unikatne ulite ali pihane steklene izdelke, ki naj bi bil po eni strani kar najcenejši, po drugi strani pa omogočal kar najbolj zvesto reproduciranje pozitiva.The invention solves the technical problem of making such a molding process for unique molded or blown glass products, which, on the one hand, is supposed to be the cheapest and, on the other, the most faithful to reproduce the positive.

Stanje tehnikeThe state of the art

Izumitelju so znani le jekleni večdelni kalupi za izdelavo večjega števila steklenih ulitkov. Ti kalupi so predragi za unikatno izdelavo umetniških predmetov iz stekla.The inventor only knows steel multi-part molds for making a large number of glass castings. These molds are too expensive to uniquely produce art objects made of glass.

Opis nove rešitveDescription of the new solution

Bistvo izuma je v tem, daje kalup izdelan na podlagi pozitiva iz snovi s tališčem, ki leži znatno pod zmehčiščem stekla, samo gradivo kalupa pa je iz takšne zmesi, ki omogoča zadostno trdnost do strditve ulitega predmeta, nakar samodejno ali z rahlim udarcem razpade v prah. V nadaljevanju bo postopek podrobneje opisan.It is an object of the invention that the mold is made on the positive of a substance with a melting point substantially below the softening of the glass, and only the mold material is of such a mixture as to allow sufficient strength to solidify the cast object, after which it automatically or with slight impact breaks into dust. The procedure will be described in more detail below.

Na pozitiv nanesemo ločitveni premaz iz zmesi snovi, ki so obstojne pri visoki temperaturi. To je prva plast kalupa. Počakamo, da se premaz strdi in nato vstavimo premazan pozitiv v jeklen okrov in pozitiv zadelamo z zmesjo kremenčevega peska, furanske smole in paratoluolsulfonske kisline. Bodoči kalup naj ima oddušek. Počakamo, da se zmes, s katero smo zadelali premazan pozitiv strdi, nato damo vse skupaj v peč in grejemo toliko časa, da se pozitiv stali in izteče iz kalupa. Tako je kalup izdelan.A positive coating of a mixture of substances that are resistant to high temperature is applied to the positive. This is the first layer of mold. Wait for the coating to harden and then insert the coated positive into the steel casing and hit the positive with a mixture of silica sand, furan resin and paratoluenesulfonic acid. The future mold should have a vent. Wait for the mixture to hit the coated positive to harden, then put it all together in the oven and heat until the positive has melted and flows out of the mold. This is how the mold is made.

Postopek pri izvedbenbenem primeru poteka sledeče: Za pozitiv uporabimo vosek in nanj nanesemo zaščitni premaz iz zmesi, katere 100 g vsebuje najmanj 30 g furanske smole, najmanj 10 g paratoluolsulfonske kisline, najmanj 10 g grafita v prahu, preostanek do 100 g pa je kremenčev pesek. Ko se premaz strdi, damo tako premazan pozitiv v jeklen okrov in ga zadelamo z zmesjo, kije sestavljena tako, da 100 g kremenčevega peska dodamo najmanj 2 g furanske smole in najmanj 0,7 g paratoluolsulfonske kisline. Počakamo, da se zmes strdi in nato vse skupaj segrevamo v peči do temperature, zadosti visoke, da vosek izteče iz kalupa. Prednost kalupa po izumu je poleg cenenosti še ta, daje z njim možno izdelati ulitke poljubnih oblik, tudi tiste z negativnimi koti, saj kmalu po tem, ko se vanj ulito steklo strdi, razpade v prah in ostane samo stijen steklen ulitek. Na ta način je možno izdelovati steklene izdelke praktično poljubnih oblik po predlogah oblikovalcev.The procedure of the embodiment is as follows: For the positive, use wax and apply a protective coating of a mixture of 100 g containing at least 30 g of furan resin, at least 10 g of paratoluenesulfonic acid, at least 10 g of graphite powder, and the remainder up to 100 g is silica sand . When the coating has hardened, the coated positive is then applied to the steel casing and hit with a mixture composed by adding at least 2 g of furan resin and at least 0.7 g of paratoluenesulfonic acid to 100 g of quartz sand. Allow the mixture to solidify and then heat it all in the oven to a temperature high enough for the wax to flow out of the mold. The advantage of the mold according to the invention is, in addition to its cheapness, that it can produce castings of any shape, even those with negative angles, because soon after the cast glass hardens, it disintegrates into dust and only the glass cast is left behind. In this way it is possible to produce glass products of virtually any shape according to the designers' suggestions.

Claims

Claims:

1. A process for the cheap manufacture of molds for unique molded or blown glass products, characterized in that a protective coating is applied to the positive of a substance with a melting point substantially below the softening of the glass, wait for it to harden, then insert the coated positive into the steel housing, hit with a mixture of quartz sand, furan resin and paratoluenesulfonic acid, wait for the mixture to harden, then put it all together in a furnace and heat to a high enough temperature for the positive to melt and flow out of the mold.

Process according to claim 1, characterized in that the wax positive is a protective coating of a mixture of 100 g containing at least 30 g of furan resin, at least 10 g of paratoluenesulfonic acid, at least 10 g of graphite powder, and the remainder is silica sand, the finishing mixture is made by adding at least 2 g of furan resin and at least 0.7 g of paratoluenesulfonic acid to 100 g of silica sand.