GB480627A - Method of removing the mould in the production of prosthetic parts and the like mouldings - Google Patents

Method of removing the mould in the production of prosthetic parts and the like mouldings

Info

Publication number
GB480627A
GB480627A GB514/37A GB51437A GB480627A GB 480627 A GB480627 A GB 480627A GB 514/37 A GB514/37 A GB 514/37A GB 51437 A GB51437 A GB 51437A GB 480627 A GB480627 A GB 480627A
Authority
GB
United Kingdom
Prior art keywords
mould
moulds
acid
ammonia
plaster
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.)
Expired
Application number
GB514/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB480627A publication Critical patent/GB480627A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

In making prosthetic parts such as in dentistry, of metal, rubber or synthetic resin, in a mould, for example of plaster or phosphates, the mould is removed by treating with a disintegrating liquid which renders the mould friable. The liquid may produce chemical changes in the material or generate gas or heat. Several such liquids may be used in succession. Alcohols, aldehydes, ketones, acids, alkalies, oxides, or peroxides or solutions or mixtures thereof may be used. The mould may be pre-heated or heat may be applied during the treatment which may be carried out under vacuum. In examples, alcohol, acetone, hydrogen peroxide, formaldehyde, ammonia, caustic soda, soda followed by hydrochloric acid, formic acid followed by ammonia, and sulphuric acid are used for plaster moulds and nitric acid is used for phosphate moulds. The Specification as open to inspection under Sect. 91 refers also to the use of hydrofluoric acid and also to the treatment of silicate moulds. This subject-matter does not appear in the Specification as accepted.
GB514/37A 1936-01-07 1937-01-07 Method of removing the mould in the production of prosthetic parts and the like mouldings Expired GB480627A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH480627X 1936-01-07

Publications (1)

Publication Number Publication Date
GB480627A true GB480627A (en) 1938-02-25

Family

ID=4516305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB514/37A Expired GB480627A (en) 1936-01-07 1937-01-07 Method of removing the mould in the production of prosthetic parts and the like mouldings

Country Status (1)

Country Link
GB (1) GB480627A (en)

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