DE3504758A1 - Production of modelling plaster - Google Patents

Production of modelling plaster

Info

Publication number
DE3504758A1
DE3504758A1 DE19853504758 DE3504758A DE3504758A1 DE 3504758 A1 DE3504758 A1 DE 3504758A1 DE 19853504758 DE19853504758 DE 19853504758 DE 3504758 A DE3504758 A DE 3504758A DE 3504758 A1 DE3504758 A1 DE 3504758A1
Authority
DE
Germany
Prior art keywords
plaster
modelling
production
paris
mixing
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.)
Ceased
Application number
DE19853504758
Other languages
German (de)
Inventor
Gabriele 6600 Saarbrücken Lulka
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.)
Lulka Gabriele 6601 Heusweiler De
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
Priority to DE19853504758 priority Critical patent/DE3504758A1/en
Publication of DE3504758A1 publication Critical patent/DE3504758A1/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/147—Alkali-metal sulfates; Ammonium sulfate

Abstract

The invention relates to a composition of plaster and potassium sulphate. Advantages of the process: owing to the mixing time indicated and to the potassium sulphate content indicated, relative to the total mixture, a material mixture is formed which is outstandingly suitable for modelling, since the reaction time is kept very short as compared with conventional material. List of goods: plasters for the dental and orthopaedic fields, for the drop-forging field and for the foundry.

Description

Beschreibungdescription

Herstellung von Modellgips Gegenstand der Erfindung ist die Zusammensetzung von Gips-und Kaliumsulfat. Production of plaster of paris The subject of the invention is the composition of gypsum and potassium sulfate.

Das Material setzt sich zusammen aus einem feinkörnigen Gips (ca. 2 500 Maschen). Der Gips hat einen Gips- Wasserfaktor von 1,43/1. Die Expansion = 0,2 %. Der Gips wird mit Wasser so angesetzt, daß sich der Gips- Wassertaktor von 1,43/1 als optimal herausgestellt hat. Die Expansion des Gießmaterials beträgt 0,2 %, Abbindezeit der Gießmasse beträgt ca. Lt min, gemessen von einer Menge von ca. 50 kg. Per Gießling erhält nach 15 - 18 min. eine Härte von ca. 200 Kp/cm2. Der Gießling entwickelt eine Eigenwärme beim Abbinden von 18 - 21o (bei 200 Arbeitstemperatur). Die Biegezugfestigkeiten betragen ca. 40 Kp/cm2.The material consists of a fine-grain plaster of paris (approx. 2,500 meshes). The plaster has a plaster water factor of 1.43 / 1. The expansion = 0.2%. The plaster of paris is mixed with water in such a way that the plaster of paris water actuator of 1.43 / 1 has proven to be optimal. The expansion of the casting material is 0.2%, the setting time of the casting compound is approx. Lt min, measured from an amount of approx. 50 kg. Each casting has a hardness of approx. 200 Kp / cm2 after 15 - 18 minutes. The casting develops its own heat when setting from 18 - 21o (at 200 working temperature). The flexural strengths are approx. 40 Kp / cm2.

Mischvorgang nuf die 1. Lage von 50 kg Gipsmaterial eingefüllt in den Mischer kommen 400 g Kaliumsulfat. Diese 400 g werden feinsäuberlich auf die Oberfläche des Gipsmaterials aufgestreut und gleichmäßig verteilt. Dann wird die zweite Schricht aufgebracht (ebenfalls 50 kg GiPs mit der schon vorher geschilderten Sulfatmenge von 40 g); dann die dritte Schicht (gleiches wie vor) > insgesamt also drei Schichten Danach wird die Mischmaschine eingeschaltet. Die Zeit ist angefähr 15 min. (nicht mehr und nicht weniger). Wird die Mischzeit unter- oder üterschritten, so entsteht zwangsweise ein "Endmischen", d. h. das Material erhält nicht die gewünschte Festigkeit. Mixing process nuf the 1st layer of 50 kg plaster material poured into the mixer comes 400 g of potassium sulfate. These 400 g are neatly applied to the The surface of the plaster of paris material is sprinkled and evenly distributed. Then the second layer applied (also 50 kg GiPs with the one already described Amount of sulfate of 40 g); then the third layer (same as before)> in total so three layers Then the mixer is switched on. The time is about 15 minutes (no more and no less). Will the mixing time If it falls below or below this, a "final mixing" is inevitable, i.e. H. the material does not get the desired strength.

ei der Mischmaschine handelt es solch um eine Spezialmaschine in der eire spezielle Mischwelle horizontal eingebaut ist.The mixing machine is such a special machine in the A special mixing shaft is installed horizontally.

Durch das gleichmäßige Drehen der Welle (1 sek. pro Umdrehung) entsteht ein gleichmäßiges kontiruirliches Mischen des Gipsmaterials mit dem Kaliumsulfat.The even turning of the shaft (1 sec. Per revolution) creates an even continuous mixing of the plaster of paris with the potassium sulfate.

Vorteile des Verfahrens: Durch die angegebene Mischzeit und den angegebenen Kaliumsulfatanteil, bezogen auf die Gesamtmischung, entsteht eine Materialmischung die sich ausgezeichnet eignet ftr den Modellbau in so fern die Reaktionszeiten gegenüber dem herkömmlichen Material sehr kurz gehalten sind.Advantages of the process: Due to the specified mixing time and the specified Potassium sulphate, based on the total mixture, creates a material mixture which is excellently suited for model making in so far as the reaction times are compared the conventional material are kept very short.

Desweiteren kann dieses Material als Modellgips kommerziell günstig angeboten werden.Furthermore, this material can be used commercially as plaster of paris Tobe offered.

Claims (1)

Patentansprüch: Herstellung von Modellgips Dadurch gekennzeichnet, daß das Gipsmaterial mit dem Kaliumsulfat in der wie vorher beschriebenen Weise exakt miteinander vermischt wird, und daß als Katalysator nur Kaliumsulfat verwendet wird.Patent claims: Production of plaster of paris characterized by that the gypsum material with the potassium sulfate in the manner as previously described is exactly mixed with each other, and that only potassium sulfate is used as a catalyst will.
DE19853504758 1985-02-13 1985-02-13 Production of modelling plaster Ceased DE3504758A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853504758 DE3504758A1 (en) 1985-02-13 1985-02-13 Production of modelling plaster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853504758 DE3504758A1 (en) 1985-02-13 1985-02-13 Production of modelling plaster

Publications (1)

Publication Number Publication Date
DE3504758A1 true DE3504758A1 (en) 1986-08-28

Family

ID=6262307

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853504758 Ceased DE3504758A1 (en) 1985-02-13 1985-02-13 Production of modelling plaster

Country Status (1)

Country Link
DE (1) DE3504758A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329246A1 (en) * 1982-08-13 1984-02-23 G-C Dental Industrial Corp., Tokyo PLASTER COMPOSITIONS FOR BIT EMBEDDINGS

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329246A1 (en) * 1982-08-13 1984-02-23 G-C Dental Industrial Corp., Tokyo PLASTER COMPOSITIONS FOR BIT EMBEDDINGS

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: LULKA, GABRIELE, 6601 HEUSWEILER, DE

8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: C04B 11/00

8131 Rejection