JPS6215221B2 - - Google Patents
Info
- Publication number
- JPS6215221B2 JPS6215221B2 JP4165184A JP4165184A JPS6215221B2 JP S6215221 B2 JPS6215221 B2 JP S6215221B2 JP 4165184 A JP4165184 A JP 4165184A JP 4165184 A JP4165184 A JP 4165184A JP S6215221 B2 JPS6215221 B2 JP S6215221B2
- Authority
- JP
- Japan
- Prior art keywords
- denture
- crushing agent
- formwork
- hole
- gypsum
- 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
Links
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000009415 formwork Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000004815 dispersion polymer Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 description 17
- 239000010440 gypsum Substances 0.000 description 17
- 239000011505 plaster Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000006378 damage Effects 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- LZBCVRCTAYKYHR-UHFFFAOYSA-N acetic acid;chloroethene Chemical compound ClC=C.CC(O)=O LZBCVRCTAYKYHR-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Dental Prosthetics (AREA)
- Disintegrating Or Milling (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、脆性型枠により製品、たとえば義歯
用石こう歯型から義歯を取り出すに際し、膨張性
破砕剤を用いることにより製品、たとえば義歯に
損傷を与えることなく型枠を破壊することができ
る脆性型枠の破壊方法に関するものである。Detailed Description of the Invention <Industrial Field of Application> The present invention provides a method for preventing damage to the product, such as a denture, by using an expansive crushing agent when removing the product, such as a denture from a plaster mold for a denture, using a brittle mold. This invention relates to a method for destroying brittle formwork that can destroy the formwork without causing damage.
〈従来の技術〉
義歯用石こう歯型から義歯をとり出す場合を例
に説明すると、一般に、義歯には極部義歯と総義
歯とがあり、これらの義歯の製造は印象採得、
石こう流入、ロウ提の作成、入口歯配列、
フラスコ埋没、ロウの融解、樹脂のフラス
コ填入、加熱重合、義歯脱型、などの工程を
経て行なわれるものであり、歯型となる歯科用石
こうには超硬石こう、硬石こうおよび歯科用石こ
うが前記流膏工程で使用される。硬化した石こう
歯型から義歯を脱型するにあたつては、従来、鉗
子などの器具が用いられており、義歯を破損する
ことなく端部より人の握力を利用して慎重に破壊
せんとすれば、それなりの熟練を要するととも
に、多大な労力と時間を要するという問題があつ
た。義歯が変形すると入歯時の固定が悪くなり、
使用困難となるためであつて、１日数個しか脱型
できなかつたのが実状である。<Prior art> Taking the case of removing a denture from a plaster mold for a denture as an example, dentures generally include polar dentures and complete dentures, and the manufacturing of these dentures involves making impressions,
Gypsum inflow, creation of wax, entrance tooth arrangement,
The process involves immersion in a flask, melting of wax, filling of resin into the flask, heating polymerization, and removal of the denture mold.The dental plaster used to form the tooth mold includes carbide gypsum, hard gypsum, and dental gypsum. is used in the plastering process. Traditionally, instruments such as forceps have been used to remove a denture from a hardened plaster cast, and the denture must be carefully broken using the human grip from the edges without damaging it. This poses a problem in that it requires a certain degree of skill and requires a great deal of labor and time. When dentures become deformed, they become less secure when inserted,
This made it difficult to use, and in reality, only a few molds could be removed per day.
〈発明が解決しようとする問題点〉
本発明は、かかる実状に鑑みて提案されたもの
であつて、熟練を要せず、しかも、製品（たとえ
ば義歯）に変形を与えることなく容易に脱型する
ことができる脆性型枠（たとえば義歯用石こう歯
型）の破壊方法を提供せんとするものである。<Problems to be Solved by the Invention> The present invention was proposed in view of the above-mentioned circumstances, and it does not require any skill and can be easily demolded without deforming the product (for example, dentures). It is an object of the present invention to provide a method for destroying a brittle mold (for example, a plaster mold for a denture) that can be destroyed.
〈問題点を解決するための手段〉
かかる課題を解決するため、本発明は、脆性型
枠より製品を取り出すに際し、前記型枠の所定位
置に穿孔するとともに、この穿孔に膨張性破砕剤
を充填する一方、穿孔に膨張性破砕剤の充填され
た前記型枠を膨張性破砕剤の膨張によつて生ずる
膨張圧により破砕することを特徴とする。<Means for Solving the Problems> In order to solve the problems, the present invention provides that, when taking out a product from a brittle formwork, holes are drilled at a predetermined position in the formwork, and the perforations are filled with an expandable crushing agent. On the other hand, the method is characterized in that the formwork whose perforations are filled with an expandable crushing agent is crushed by the expansion pressure generated by the expansion of the expandable crushing agent.
〈実施例〉
以下、実施例とともに、本発明に係る脆性型枠
の破壊方法を義歯用石こう歯型の破壊を例にして
説明する。<Example> Hereinafter, together with Examples, a method for destroying a brittle mold according to the present invention will be explained by taking the destruction of a plaster tooth mold for a denture as an example.
本発明において義歯用歯型より義歯を取り出す
場合には、石こう歯型の所定位置、たとえば義歯
近傍の石こう歯型中に２〜10mm、好ましくは３〜
５mmの穿孔を小型電気ドリル等の穿孔機を用いて
穿孔することから始められる。孔長は石こう歯型
を貫通しない程度であればよく、穿孔に際して石
こう歯型を貫通してしまつても、低部から膨張性
破砕剤が流出しないようにテープ等でおさえるか
石こう等で底部をふさいでおけばよい。なお、穿
孔する位置および数に特別の限定を設ける必要は
なく、脱型時間、石こう歯型の大きさ等により適
宜選択される。 In the present invention, when taking out the denture from the denture tooth mold, a predetermined position of the gypsum tooth mold, for example, 2 to 10 mm, preferably 3 to 10 mm, into the gypsum tooth mold near the denture.
It begins by drilling a 5 mm hole using a drilling machine such as a small electric drill. The length of the hole should be such that it does not penetrate the gypsum tooth mold, and even if the hole does penetrate the gypsum tooth mold during drilling, it should be covered with tape or the like or plastered at the bottom to prevent the expansible crushing agent from flowing out from the bottom. Just block it off. Note that there is no need to set any special limitations on the position and number of holes to be drilled, and they are appropriately selected depending on the demolding time, the size of the gypsum tooth mold, and the like.
穿孔が完了すると、穿孔表面にはポリマーデイ
スパージヨン、たとえばエチレン酢酸ビニルエマ
ルジヨン、アクリル樹脂エマルジヨン、塩化ビニ
ルエマルジヨン（溶剤タイプでもよい。）等が塗
布され、防水膜による防水処置が施こされるのが
好ましい。これは石こう歯型に用いられる石こう
は吸水性が大きいため、後述する膨張性破砕剤の
水分が吸収されて充分な膨張圧が穿孔内で保たれ
なくなるのを防止するためである。 When the perforation is completed, a polymer dispersion such as ethylene vinyl acetate emulsion, acrylic resin emulsion, vinyl chloride emulsion (solvent type is also acceptable), etc. is applied to the perforation surface, and waterproofing treatment with a waterproof membrane is applied. It is preferable to This is to prevent the gypsum used in the gypsum tooth mold from absorbing moisture from the expandable crushing agent, which will be described later, from being unable to maintain sufficient expansion pressure within the hole, since it has high water absorption.
ポリマーデイスパージヨンが穿孔表面に塗布さ
れ防水処理が施こされると、穿孔内には膨張性破
砕剤が充填される。本発明に用いられる膨張性破
砕剤は公知のもの、たとえば「プライスター」
（小野田セメント株式会社製）（商品名）でよく、
特に破砕時間を短縮せんとする場合には、反応速
度の速い冬期用の破砕剤を用いると効果的であ
る。また、充填に際しては、膨張性破砕剤を水で
練り混ぜたスラリーを注射器またはスポイト等を
用いて孔中に充填してもよいし、膨張性破砕剤の
粉体を孔中に充填した後に水を注入してもよい。 Once the polymer dispersion has been applied to the surface of the perforation to make it waterproof, the perforation is filled with an expandable crushing agent. The expandable crushing agent used in the present invention is a known one, such as "Plystar".
(Product name) (manufactured by Onoda Cement Co., Ltd.)
Particularly when trying to shorten the crushing time, it is effective to use a crushing agent for winter use that has a fast reaction rate. When filling, a slurry made by mixing the expandable crushing agent with water may be filled into the hole using a syringe or dropper, or the expandable crushing agent powder may be filled into the hole and then water is added. may be injected.
膨張性破砕剤を孔中に充填すると破砕剤は孔中
で十分に養生され、破砕剤の膨張によつて生ずる
膨張圧が石こう歯型に伝わり、石こう歯型が破壊
されるものである。 When the expanding crushing agent is filled into the hole, the crushing agent is sufficiently cured in the hole, and the expansion pressure generated by the expansion of the crushing agent is transmitted to the gypsum tooth mold, thereby destroying the gypsum tooth mold.
なお、破壊時間を短縮するためには、膨張性破
砕剤を孔中に充填した後に30゜〜80℃の温水（冷
水に浸漬した後に加温してもよい。）やスチーム
バスに浸漬すると効果的であり、１時間以内の破
壊が可能となる。 In addition, in order to shorten the fracture time, it is effective to immerse the material in hot water of 30° to 80°C (you may warm it up after immersing it in cold water) or in a steam bath after filling the hole with an expandable crushing agent. It is highly effective and can be destroyed within one hour.
実施例 １
総義歯が流膏された石こう歯型の総義歯との周
囲境界面に孔径５mmの孔を電気ドリルを用いて孔
長10〜12mmで穿孔し、この孔に塩化ビニル一酢酸
ビニルエマルジヨンから成るポリマーデイスパー
ジヨン「エフエクト」（小野田建材株式会社製）
（商品名）を筆を用いて塗布した後、直ちに膨張
性破砕剤「ブライスター」（小野田セメント株式
会社製）（商品名）の水比30％で練り混ぜたスラ
リーをスポイトを用いて充填した。その後、布で
石こう歯型を全面覆い40℃の温水に浸したとこ
ろ、40分で穿孔間に亀裂が発生し、容易に義歯を
石こう歯型から脱型することができた。Example 1 A hole with a diameter of 5 mm and a hole length of 10 to 12 mm was drilled on the peripheral interface between the complete denture and the plastered complete denture using an electric drill, and the hole was filled with vinyl chloride monoacetate emulsion. Polymer dispersion “Effect” consisting of carbon fiber (manufactured by Onoda Kenzai Co., Ltd.)
(Product name) was applied using a brush, and immediately filled with a slurry of the expandable crushing agent "Blystar" (manufactured by Onoda Cement Co., Ltd.) (Product name) mixed with a water ratio of 30% using a dropper. . After that, when the gypsum tooth mold was completely covered with a cloth and immersed in warm water at 40°C, cracks appeared between the perforations in 40 minutes, and the denture could be easily removed from the gypsum tooth mold.
実施例 ２
極部義歯が流膏された石こう歯型の極部義歯と
の周囲境界面に孔径３mm、孔長10mmの孔を電気ド
リルを用いて穿孔し、直ちにアクリルエマルジヨ
ンから成るポリマーデイスパージヨンを筆を用い
て塗布した後、実施例１と同様の膨張性破砕剤を
注射器を用いて充填した。これを室温30℃の部屋
に放置したところ、１時間で亀裂が発生し、２時
間後には亀裂が穿孔間にまで拡大し、容易に義歯
を石こう歯型から脱型することができた。Example 2 A hole with a hole diameter of 3 mm and a hole length of 10 mm was drilled using an electric drill at the peripheral interface between the polar denture and the plastered plaster-shaped polar denture, and a polymer disper made of acrylic emulsion was immediately drilled. After applying the dillion using a brush, the same expandable crushing agent as in Example 1 was filled using a syringe. When this was left in a room at a room temperature of 30°C, cracks appeared in one hour, and after two hours the cracks expanded to the area between the perforations, making it possible to easily remove the denture from the plaster tooth mold.
以上、実施例とともに説明したように、本発明
に係る脆性型枠の破壊方法によれば、
１ 破壊に際して熟練を要せず容易に脱型するこ
とができる。 As described above in conjunction with the embodiments, according to the method for breaking a brittle formwork according to the present invention: 1. The mold can be easily demolded without requiring any skill at the time of breaking.
２ 従来の鉗子等による破壊においては製品（た
とえば義歯）に対し局部（集中）応力が発生し
製品に悪影響を及ぼしたが、膨張性破砕剤を用
いたことにより発現する膨張圧のバランスがと
れ、偏応力が発生せず、製品への影響を最小限
にとどめることができる。2. In conventional destruction using forceps, etc., local (concentrated) stress is generated on the product (for example, dentures), which has an adverse effect on the product, but by using an expanding crushing agent, the expansion pressure developed can be balanced, Unbalanced stress does not occur, and the impact on the product can be kept to a minimum.
なお、本発明の実施例では、義歯用石こう歯型
の破壊を例に説明したが、本発明はこれのみにと
どまらず、石こうを使用して製造される陶磁器用
型枠、鋳型、模型用型枠の破壊などに適用される
ことはいうまでもない。 In the embodiments of the present invention, destruction of a gypsum tooth mold for dentures was explained as an example, but the present invention is not limited to this, but also applies to ceramic molds, casting molds, and model molds manufactured using gypsum. Needless to say, this method is also applied to destruction of frames, etc.
Claims (1)
枠の所定位置に穿孔するとともに、この穿孔に膨
張性破砕剤を充填する一方、穿孔に膨張性破砕剤
の充填された前記型枠を膨張性破砕剤の膨張によ
つて生ずる膨張圧により破砕することを特徴とす
る脆性型枠の破壊方法。 ２ 前記穿孔表面にポリマーデイスパージヨンを
塗布したことを特徴とする特許請求の範囲第１項
記載の脆性型枠の破壊方法。[Scope of Claims] 1. When taking out a product from a brittle formwork, a hole is drilled at a predetermined position in the formwork, and the perforation is filled with an expandable crushing agent; A method for breaking a brittle formwork, characterized in that the formwork is crushed by expansion pressure generated by expansion of an expandable crushing agent. 2. The method for destroying brittle formwork according to claim 1, characterized in that a polymer dispersion is applied to the surface of the perforation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59041651A JPS60185546A (en) | 1984-03-05 | 1984-03-05 | Destruction of gypsum tooth model for denture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59041651A JPS60185546A (en) | 1984-03-05 | 1984-03-05 | Destruction of gypsum tooth model for denture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60185546A JPS60185546A (en) | 1985-09-21 |
| JPS6215221B2 true JPS6215221B2 (en) | 1987-04-06 |
Family
ID=12614260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59041651A Granted JPS60185546A (en) | 1984-03-05 | 1984-03-05 | Destruction of gypsum tooth model for denture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60185546A (en) |
-
1984
- 1984-03-05 JP JP59041651A patent/JPS60185546A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60185546A (en) | 1985-09-21 |
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