US1967740A - Method of manufacturing molds - Google Patents

Method of manufacturing molds Download PDF

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Publication number
US1967740A
US1967740A US512739A US51273931A US1967740A US 1967740 A US1967740 A US 1967740A US 512739 A US512739 A US 512739A US 51273931 A US51273931 A US 51273931A US 1967740 A US1967740 A US 1967740A
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US
United States
Prior art keywords
metal
mold
coating
colloidal
manufacture
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Expired - Lifetime
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US512739A
Inventor
Brill Eugen
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.)
Schering Kahlbaum AG
Original Assignee
Schering Kahlbaum AG
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 Schering Kahlbaum AG filed Critical Schering Kahlbaum AG
Application granted granted Critical
Publication of US1967740A publication Critical patent/US1967740A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/70—Tooth crowns; Making thereof

Definitions

  • My invention relates to improvements in the method of manufacturing objects from porcelain or cast metal and in the mold used in the said method, and more particularly in the method used for example in the manufacture of fillings for teeth in which the plug is made by means of a mold shaped according to the cavity of the tooth.
  • the object of the improvements is to provide a method by means of which the said coating may be applied in a most simple way,
  • my invention consists in applying the coating in colloidal form and together with a carrier thereof.
  • I add the metal in colloidal solutions to the material from which the mold is manufactured, I manufacture the mold from the said material, and I heat the mold either before or after putting the porcelain or metal from which the plug is made into the same. By thus heating the mold a very thin and dense metal coating is produced.
  • the method 3 is important not only in the manufacture of objects from porcelain by molding, but also in the manufacture of complicated objects of metal such as tooth plugs made from metal. In the manufacture of such plugs the metal may be immediately cast into the mold in which the cavity is not provided with a metal coating because the cast metal does not adhere to the mold.
  • the herein described method of manufacturing molds for making porcelain fillings for teeth consisting in applying a colloidal metal solution by adding the same to the basic mass from which the mold is made, making an imprint, and heating the mold after the imprint, thereby causing evaporation of the solution agent of said colloidal metal solution, so that a colloidal metal coating forms on the surface of the mold.

Description

Patented July 24, 1934 UNITED STATES PATENT OFFICE METHOD OF MANUFACTURING MOLDS No Drawing. Application January 31, 1931, Serial No. 512,739. In Germany April 3, 1930 1 Claim.
My invention relates to improvements in the method of manufacturing objects from porcelain or cast metal and in the mold used in the said method, and more particularly in the method used for example in the manufacture of fillings for teeth in which the plug is made by means of a mold shaped according to the cavity of the tooth. In the manufacture of such plugs it is necessary to coat the mold with a thin metal foil ordinarily made from a noble metal such as platinum or gold, in order to prevent baking together of the plug and the mold when burning or casting the material. The object of the improvements is to provide a method by means of which the said coating may be applied in a most simple way,
and in which the said coating is exceedingly thin and dense, and with this object in view my invention consists in applying the coating in colloidal form and together with a carrier thereof.
For the purpose of explaining the invention more in detail several examples embodying the same will now be described.
In accordance with my invention I add the metal in colloidal solutions to the material from which the mold is manufactured, I manufacture the mold from the said material, and I heat the mold either before or after putting the porcelain or metal from which the plug is made into the same. By thus heating the mold a very thin and dense metal coating is produced. The method 3 is important not only in the manufacture of objects from porcelain by molding, but also in the manufacture of complicated objects of metal such as tooth plugs made from metal. In the manufacture of such plugs the metal may be immediately cast into the mold in which the cavity is not provided with a metal coating because the cast metal does not adhere to the mold. However if a coating is not used it happens that 50 minute air bubbles are left between the Walls of the mold and the material cast into the same which produce irregularities on the surface of the metal casting. When coating the mold in the manner described above by means of a colloidal 55 metal solution this objection is obviated, and it is possible to manufacture exact tooth plugs or other pieces of metal of very complicated shape by casting the metal into a mold which before has been coated by colloidal metal. 7
While in describing the invention reference has been made to particular examples embodying the same I wish it to be understood that my invention is not limited to the methods of applying the coating of colloidal metal described herein, and that various changes may be made in the said method without departing from the invention.
I claim:
The herein described method of manufacturing molds for making porcelain fillings for teeth, consisting in applying a colloidal metal solution by adding the same to the basic mass from which the mold is made, making an imprint, and heating the mold after the imprint, thereby causing evaporation of the solution agent of said colloidal metal solution, so that a colloidal metal coating forms on the surface of the mold.
EUGEN BRILL.
US512739A 1930-04-03 1931-01-31 Method of manufacturing molds Expired - Lifetime US1967740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1967740X 1930-04-03

Publications (1)

Publication Number Publication Date
US1967740A true US1967740A (en) 1934-07-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286974A (en) * 1962-05-09 1966-11-22 Mc Graw Edison Co Ceramic mold

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286974A (en) * 1962-05-09 1966-11-22 Mc Graw Edison Co Ceramic mold

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