DE3013848A1 - Dentistry grinding disc or tip prodn. - by cold-mixing pref. unsatd. polyester binder and abrasive, forming and hardening - Google Patents
Dentistry grinding disc or tip prodn. - by cold-mixing pref. unsatd. polyester binder and abrasive, forming and hardeningInfo
- Publication number
- DE3013848A1 DE3013848A1 DE19803013848 DE3013848A DE3013848A1 DE 3013848 A1 DE3013848 A1 DE 3013848A1 DE 19803013848 DE19803013848 DE 19803013848 DE 3013848 A DE3013848 A DE 3013848A DE 3013848 A1 DE3013848 A1 DE 3013848A1
- Authority
- DE
- Germany
- Prior art keywords
- cold
- abrasive
- binder
- hardening
- prodn
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/06—Tooth grinding or polishing discs; Holders therefor
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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
Verfahren zum Herstellen von Schleif-, Trenn-,Separier- Process for the production of grinding, cutting, separating
und Polierscheiben, -spitzen od. dgl. and polishing discs, tips or the like.
Die Erfindung betrifft ein Verfahren zum Herstellen von Schleif-, Trenn-, Separier- und Polierscheiben, -spitzen od. dgl., insbesondere für medizinische Zwecke, aus mit einem Bindemittel versehenen Schleifmittel.The invention relates to a method for producing grinding, Separating, separating and polishing disks, tips or the like, in particular for medical applications Purposes, from abrasives provided with a binder.
Scheiben oder Spitzen dieser Art werden vor allem in zahnärztlichen Praxen bzw. Laboratorien verwandt und dienen der Bearbeitung von Prothesen od. dgl. Sie sind bei ihrer Benutzung erheblichen Beanspruchungen ausgesetzt und müssen deshalb spezielle chemische, physikalische und mechanische Eigenschaften aufweisen.Discs or tips of this type are mainly used in dental applications Practices or laboratories related and are used to process prostheses or the like. They are exposed to considerable stress during their use and must therefore have special chemical, physical and mechanical properties.
Bislang erfolgt ihre Herstellung in der Regel aus Phenolharzen oder Kautschuksbeschichtet oder gemischt mit Schleifmittel, wie z. B. Korund, wobei die Masse einer bestimmten Wärmebehandlung unterzogen wird.So far, they have usually been made from phenolic resins or Rubber coated or mixed with abrasives such as B. corundum, the Mass is subjected to a certain heat treatment.
Bekannt sind auch beschichtete Diamantscheiben, welche aber sehr teuer sind und deshalb nur für bestimmte Arbeiten verwendet werden.Coated diamond disks are also known, but they are very expensive and are therefore only used for certain work.
Diese bekannten Scheiben bzw. Spitzen haben zum einen den Nachteil, daß ihre Herstellung durch die Wärmebehandlung relativ viel Zeit in Anspruch nimmt, da das Aushärten abgewartet werden muß, bevor die Scheibe weiterbehandelt werden kann. Weiterhin erzeugen sie beim Bearbeitungsvorgang in den Laboratorien eine Geruchsbelästigung, welche ihre Anwendung aus arbeitsplatzhygienischen Gründen als ungünstig erscheinen läßt.On the one hand, these known discs or tips have the disadvantage that their production takes a relatively long time due to the heat treatment, since the hardening must be awaited before the pane can be treated further can. Furthermore, they produce an odor nuisance during the processing process in the laboratories, which appear to be unfavorable to use for reasons of workplace hygiene leaves.
In der Praxis hat sich weiterhin gezeigt, daß die so hergestellten Scheiben in vielen Fällen nicht den an sie gestellten mechanischen Anforderungen gerecht werden.In practice it has also been shown that the so produced In many cases, disks do not meet the mechanical requirements placed on them satisfy.
Der Erfinder hat sich zum Ziel gesetzt ein Verfahren zu entwickeln, durch welches die vorgenannten Nachteile vermieden und Scheiben bzw. Spitzen vor allem kostengünstig herzustellen sind.The inventor has set himself the goal of developing a process by which the aforementioned disadvantages avoided and discs or tips before all are inexpensive to manufacture.
Diese Aufgabe wird dadurch gelöst, daß das Bindemittel zusammen mit dem Schleifmittel kalt angemischt, geformt und gehärtet wird.This object is achieved in that the binder together with cold mixed with the abrasive, shaped and hardened.
Als Bindemittel für dieses Verfahren bietet sich vor allem Polyester bzw. Polyesterharze an. Diese haben den Vorteil, daß sie einfach zu handhaben, kalt zu verformen und sehr kostengünstig sind.Polyester is the most suitable binder for this process or polyester resins. These have the advantage that they are easy to handle when cold deform and are very inexpensive.
Die Erfindung umfaßt auch die Verwendung von ungesättigten Polyesterharzen, welche vor allem als Gießharze Anwendung finden können.The invention also includes the use of unsaturated polyester resins, which can be used primarily as casting resins.
Die Polyester haben zudem den erheblichen Vorteil, daß sie kaum geruchsbelästigend wirken und so den Laborbetrieb wenig stören.The polyesters also have the considerable advantage that they hardly have any offensive odors act and thus disrupt laboratory operations little.
Diesem Bindemittel wird in der Regel ein Beschleuniger oder Härter zugesetzt, um den Aushärtungszeitraum zu verkürzen. Hierfür kommt z. B. der unter dem Industrienamen BP 50 bekannte Beschleuniger in Frage. Auch dieser wird dem Bindemittel kalt beigegeben.This binder is usually an accelerator or hardener added to shorten the curing period. For this comes z. B. the under accelerator known from the industry name BP 50 in question. This too becomes the binder added cold.
Besonders günstig als Schleifmittel für dieses Verfahren haben sich Aluminiumoxid bzw. Edelkorund und Siliziumkarbid erwiesen. Sie beweisen in der Praxis in Verbindung mit dem Polyester sehr gute mechanische Eigenschaften.Particularly beneficial as abrasives for this process have Aluminum oxide or high-grade corundum and silicon carbide have been proven. They prove it in practice Very good mechanical properties in connection with the polyester.
Allerdings umfaßt der Erfindungsgedanke auch den Zusatz weiterer in der Zahntechnik üblicher Schleifmittel.However, the concept of the invention also includes the addition of further in abrasives commonly used in dental technology.
Selbstverständlich ist es auch möglich den Härtevorgang durch Wärmezugabe zu beschleunigen, jedoch genügt nach dem vorliegenden Verfahren ein Kaltaushärtenlassen.It goes without saying that the hardening process can also be carried out by adding heat to accelerate, however, a cold hardening is sufficient according to the present method.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803013848 DE3013848A1 (en) | 1980-04-10 | 1980-04-10 | Dentistry grinding disc or tip prodn. - by cold-mixing pref. unsatd. polyester binder and abrasive, forming and hardening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803013848 DE3013848A1 (en) | 1980-04-10 | 1980-04-10 | Dentistry grinding disc or tip prodn. - by cold-mixing pref. unsatd. polyester binder and abrasive, forming and hardening |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3013848A1 true DE3013848A1 (en) | 1981-10-15 |
Family
ID=6099691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803013848 Withdrawn DE3013848A1 (en) | 1980-04-10 | 1980-04-10 | Dentistry grinding disc or tip prodn. - by cold-mixing pref. unsatd. polyester binder and abrasive, forming and hardening |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3013848A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0381662A2 (en) * | 1989-01-30 | 1990-08-08 | MAGINDAG Steirische Magnesit-Industrie Aktiengesellschaft | Process for the manufacture of abrasive bodies |
EP0530646A1 (en) * | 1991-08-30 | 1993-03-10 | Minnesota Mining And Manufacturing Company | Abrasive dental articles |
-
1980
- 1980-04-10 DE DE19803013848 patent/DE3013848A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0381662A2 (en) * | 1989-01-30 | 1990-08-08 | MAGINDAG Steirische Magnesit-Industrie Aktiengesellschaft | Process for the manufacture of abrasive bodies |
EP0381662A3 (en) * | 1989-01-30 | 1990-09-26 | Magindag Steirische Magnesit-Industrie Aktiengesellschaft | Process for the manufacture of abrasive bodies |
EP0530646A1 (en) * | 1991-08-30 | 1993-03-10 | Minnesota Mining And Manufacturing Company | Abrasive dental articles |
AU651232B2 (en) * | 1991-08-30 | 1994-07-14 | Minnesota Mining And Manufacturing Company | Abrasive dental articles |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |