JPS6152958A - Manufacture of roll-over gypsum model - Google Patents

Manufacture of roll-over gypsum model

Info

Publication number
JPS6152958A
JPS6152958A JP17458084A JP17458084A JPS6152958A JP S6152958 A JPS6152958 A JP S6152958A JP 17458084 A JP17458084 A JP 17458084A JP 17458084 A JP17458084 A JP 17458084A JP S6152958 A JPS6152958 A JP S6152958A
Authority
JP
Japan
Prior art keywords
gypsum slurry
gypsum
slurry
matrix
matrix surface
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.)
Granted
Application number
JP17458084A
Other languages
Japanese (ja)
Other versions
JPS622901B2 (en
Inventor
Kiyoshi Mitsui
清 三井
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.)
Noritake Co Ltd
Original Assignee
Noritake Co Ltd
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 Noritake Co Ltd filed Critical Noritake Co Ltd
Priority to JP17458084A priority Critical patent/JPS6152958A/en
Publication of JPS6152958A publication Critical patent/JPS6152958A/en
Publication of JPS622901B2 publication Critical patent/JPS622901B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Producing Shaped Articles From Materials (AREA)

Abstract

PURPOSE:To fill a gypsum slurry to a matrix having steep slopes and to obtain an excellent roll-over gypsum model by subjecting alternately the matrix surface on which a parting material is coated to adhering of woven fabrics stuck with calcined plaster powder with coating of a gypsum slurry and coating of the gypsum slurry. CONSTITUTION:When the woven fabric 4a stuck preliminarily with the calcined plaster powder is adhered to the matrix surface right after coating of the gypsum slurry, part of the water in the gypsum slurry is absorbed in the calcined plaster powder and therefore the viscosity of the gypsum slurry increases and even if the matrix surface has the steep slopes, the gypsum sticks stably to the matrix surface without drooping. On the other hand, the fabric 4a stuck with the calcined plaster powder is progressed in curing by the moisture absorbed from the gypsum slurry by which the fabric is laminated and integrated to the gypsum slurry. The coating of the gypsum slurry and the adhering of the woven fabric stuck with the calcined plaster powder are further repeated a required number of times. Posts 5 are finally erected at suitable points and the molding is removed from the matrix surface, by which the roll-over gypsum model reinforced with the fabrics 4a, 4b is obtd.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は倣いフライス盤用、鋳型用等に使用する反転石
膏モデルの製作方法に関するものである（従来の技術） 石膏、木材、プラスチックス等の母型から反転石膏モデ
ルを製作するには、モデルの寸法精度の向上、モデルの
反り防止等を目的として母型面に石膏スラリーを盛り付
けて硬化させ均厚薄肉のモデルとする方法が行われてい
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing an inverted plaster model used for copy milling, molding, etc. (Prior art) To produce an inverted plaster model from a matrix, a method is used in which plaster slurry is applied to the matrix surface and hardened to create a model with uniform thickness and thinness, in order to improve the dimensional accuracy of the model and prevent the model from warping. There is.

（発明が解決しようとする問題点） ところがこの方法で母型面に石膏スラリーを盛り付ける
場合、母型面の傾斜が緩やかな面には石膏スラリーの盛
り付けは行い易いが、急斜面を有する母型を用いた場合
には斜面の上方に至るに従い石膏スラリーの垂れ落ちが
起こり、均厚な盛り伺げが困難でその製作に熟練と長時
間とが必要とされていた。(Problem to be solved by the invention) However, when applying gypsum slurry to the matrix surface using this method, it is easy to apply the gypsum slurry to the surface with a gentle slope, but it is difficult to apply the gypsum slurry to the matrix surface with a steep slope. When used, the gypsum slurry drips as it reaches the top of the slope, making it difficult to build up an even thickness and requiring skill and a long time to manufacture.

（問題点を解決するための手段） 本発明は前記のような急斜面ををする母型を用いた場合
にも均厚薄肉の反転石膏モデルを容易に得ることができ
る反転石膏モデルの製作方法を目的として完成されたも
ので、離型剤が塗布された母型面へ石膏スラリーを薄く
塗着しだ後その上面に焼石膏粉が付着された織布の貼付
けと石膏スラリーの塗着とを交互に繰返し行い、該石膏
スラリーに含まれる水分をもって前記焼石膏粉が付着さ
れた織布と石膏スラリーとの積層体を硬化一体化させた
うえ母型面から脱型することを特徴とするものである。(Means for Solving the Problems) The present invention provides a method for manufacturing an inverted plaster model that can easily obtain an inverted plaster model with a uniform thickness and thin wall even when using a matrix having a steep slope as described above. It was completed for this purpose, and involves first applying a thin layer of gypsum slurry to the surface of the matrix coated with a mold release agent, then pasting a woven fabric with calcined gypsum powder attached to the top surface, and applying the gypsum slurry. The method is characterized in that the laminate of the woven fabric to which the calcined gypsum powder is adhered and the gypsum slurry is cured and integrated with the moisture contained in the gypsum slurry by repeating this process alternately, and then the mold is removed from the surface of the matrix. It is.

本発明において使用される母型は石膏、木材、プラスチ
ックス等の任意の材ｄからなるものであり、その母型面
にまず石鹸水その他の離型剤を塗布して離型処理が容易
に行えるようにしておく。The matrix used in the present invention is made of any material such as gypsum, wood, or plastic, and the surface of the matrix is first coated with soapy water or other mold release agent to facilitate mold release. Make sure you can do it.

次に、この離型剤が塗布された母型面への石膏スラリー
の塗着を行うのであるが、この母型面への石膏スラリー
の塗着は厚さが２〜３龍程度になるよう薄く行うものと
する。そして、この塗着の直後に石膏スラリーの上面へ
焼石膏粉が付着されている織布の貼付けと石膏スラリー
の塗着を交互に繰返し行う。この焼石膏粉が付着されて
いる織布は予め粗目の織布に焼石膏粉を直接付着させて
おくか、または焼石膏粉にエタノール等の水を含まない
有機溶剤を加えて泥状にしたものに粗目の織布片を浸し
て焼石’ｌ；ｆ扮を付着させておくなどの方法により製
作されるもので、母型面の大きさに合わせて適当なサイ
ズに切断しておくものとする。Next, gypsum slurry is applied to the surface of the matrix coated with this mold release agent. It shall be done thinly. Immediately after this application, the pasting of the woven fabric to which the calcined gypsum powder is attached and the application of the gypsum slurry are repeated alternately on the upper surface of the gypsum slurry. The woven fabric to which this calcined gypsum powder is attached is made by directly adhering the calcined gypsum powder to a coarse woven fabric in advance, or by adding an organic solvent that does not contain water such as ethanol to the calcined gypsum powder to make it into a slurry. It is made by dipping a piece of coarse woven cloth into a piece of cloth and attaching a piece of yakiishi to it, and then cutting it into an appropriate size according to the size of the matrix surface. do.

このように石膏スラリーを塗着した直後に予め焼石膏粉
が付着さた織布を貼付けると、石膏スラリー中の水分の
一部が焼石膏粉に吸収されるために石膏スラリーの粘度
が増し、母型面が油、斜面ををするものであっても垂れ
落ちを生ずることなく母型面に安定して付着され、一方
、焼石膏粉が付着された織布は石膏スラリーから吸収し
た水分によって硬化が進行して石膏スラリーと積層一体
化する。その後更に石膏スラリーの塗着と焼石膏粉が付
着された織布の貼付けを必要回数繰返し、最後に支柱を
適当個所に立設して石膏スラリーと焼石膏粉が付着され
た織布とを積層一体化させて硬化後に母型面から脱型す
れば、層状の織布により補強された所望厚さの均厚薄肉
の反転石膏モデルが得られる。If a woven cloth to which calcined gypsum powder has been applied is applied immediately after applying the gypsum slurry in this way, some of the moisture in the gypsum slurry will be absorbed by the calcined gypsum powder, increasing the viscosity of the gypsum slurry. , even if the matrix surface is oily or sloped, it is stably adhered to the matrix surface without dripping, while the woven fabric to which the calcined gypsum powder is attached absorbs moisture absorbed from the gypsum slurry. As a result, curing progresses and the layer becomes integrated with the gypsum slurry. After that, repeat the application of the gypsum slurry and the pasting of the woven fabric with the calcined gypsum powder adhered to it as many times as necessary, and finally, erect pillars at appropriate locations and laminate the gypsum slurry and the woven fabric with the calcined gypsum powder attached. If they are integrated and removed from the matrix surface after curing, an inverted plaster model with a uniform thickness and a thin wall of the desired thickness reinforced by the layered woven fabric can be obtained.

実施例 急斜面を有する木製の母型（１１の母型面と型枠（２）
の表面に離型剤としてカリ石鹸水を塗布し、このか 母型面に低膨張の模型川石−Ｗ−（商品名：パールスト
ンＢ−１３日東石膏社製）１００重量部と水４０重量部
とを約１０分間混練した石膏スラリーをこれがペースト
状を呈しはじめたとき２〜３ｍ真の厚さに薄く塗着して
塗着層（３ａ）を形成し、その後直ちに焼石膏粉が付着
された粗目の織布（４ａ）を石膏スラリーの塗着層（３
ａ）上に軽゛（押し付けながら貼り付けて石膏スラリー
中の水分の一部を吸収させて第１層を形成した。続いて
この第１層の上に石膏スラリーを再び厚さ２〜３順に塗
着して第２の塗着層（３ｂ）を形成し、前の作業と同様
に直ちに焼石膏粉が付着された粗目の織布（４ｂ）を前
記の石膏スラリーの塗着層（３ｂ）上に軽く押し付けな
がら貼り付けて石膏スラリー中の水分の一部を焼石膏粉
に吸収させて第２層を第１層と積層させて一体に形成し
た。さらにこの第２層の上に石膏スラリーを再び厚さ３
〜５龍に塗着して第３の塗着層（３Ｃ）を形成し、これ
らの積層体上に同時に平板（６）付きの支柱（５）を立
設した。全作業を終えてから約１時間放置し、硬化後に
母型面から脱型して第２図のような厚さ約１０鶴程度の
均Ｉ！￥薄肉な反転石膏モデルを得た。この反転石膏モ
デルは層状の織布（４ａ）、（４ｂ）により補強された
機械的強度にΦれたものであるうえ従来の反転石膏モデ
ルよりもはるかに薄肉で反りも皆無であり、寸法精度も
良好なものであった。Example Wooden matrix with a steep slope (11 matrix surfaces and formwork (2)
A potash soap solution was applied as a mold release agent to the surface of the mold, and a low expansion model Kawaishi-W- (trade name: Pearlstone B-13 manufactured by Nitto Gypsum Co., Ltd.) 100 parts by weight and 40 parts by weight of water were applied to the surface of the matrix. When the gypsum slurry was kneaded for about 10 minutes, it was applied thinly to a true thickness of 2 to 3 meters to form a coating layer (3a), and then calcined gypsum powder was immediately applied. Coarse woven fabric (4a) is coated with plaster slurry coating layer (3).
a) A first layer was formed by pasting the gypsum slurry while pressing it to absorb some of the moisture in the gypsum slurry.Then, the gypsum slurry was applied again on top of this first layer in order of thickness of 2 to 3. Coating to form a second coating layer (3b), and immediately apply the coarse woven fabric (4b) to which calcined gypsum powder has been applied as in the previous operation to the coating layer (3b) of the gypsum slurry. The second layer was laminated with the first layer by pasting it onto the top of the plaster slurry while being lightly pressed so that some of the moisture in the plaster slurry was absorbed by the calcined gypsum powder.Furthermore, on top of this second layer, the gypsum slurry was applied. again thickness 3
A third coating layer (3C) was formed by applying the coating to five layers, and at the same time, a support (5) with a flat plate (6) was erected on top of these laminates. After completing all the work, let it stand for about an hour, and after it hardens, remove it from the mother mold surface and make a uniform plate with a thickness of about 10 mm as shown in Figure 2. A thin-walled inverted plaster model was obtained. This inverted plaster model has high mechanical strength reinforced by layered woven fabrics (4a) and (4b), is much thinner than conventional inverted plaster models, has no warping, and has dimensional accuracy. It was also good.

（発明の効果） 本発明は以上の説明からも明らかなように、母型面の傾
斜が急であっても石膏スラリーを容易に盛り付けること
ができ、しかも、得られる反転石膏モデルは均厚薄肉に
して反りがなく、寸法精度が良好なうえに機械的強度に
優れたものとなり、優れた反転石膏モデルを特別なＷ）
練を要することなく迅速容易に製作することができる利
点があり従来の反転石膏モデルの製作方法の問題点を解
消したものとして産業の発達に寄与するところ大なもの
がある。(Effects of the Invention) As is clear from the above description, the present invention allows plaster slurry to be easily applied even if the slope of the matrix surface is steep, and the resulting inverted plaster model has a uniform thickness and a thin wall. It has no warpage, good dimensional accuracy, and excellent mechanical strength, making it an excellent inverted plaster model with a special W)
It has the advantage of being able to be manufactured quickly and easily without requiring any training, and it will greatly contribute to the development of industry as it solves the problems of the conventional manufacturing method of inverted plaster models.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の実施例の製作工程を示す断面図、第２
図は製作された反転石膏モデルを示す断面図である。 （１）：母型、（３ａ）、（３ｂ）、（３ｃ）　：石膏
スラリーの塗着層、（４ａ）、（４ｂ）　：焼石膏粉が
付着された識布。 第１図Figure 1 is a sectional view showing the manufacturing process of an embodiment of the present invention, Figure 2 is a cross-sectional view showing the manufacturing process of an embodiment of the present invention.
The figure is a sectional view showing the manufactured inverted plaster model. (1): Matrix, (3a), (3b), (3c): Applied layer of gypsum slurry, (4a), (4b): Paper cloth to which calcined gypsum powder is attached. Figure 1

Claims (1)

【特許請求の範囲】[Claims] 離型剤が塗布された母型面へ石膏スラリーを薄く塗着し
た後その上面に焼石膏粉が付着された織布の貼付けと石
膏スラリーの塗着とを交互に繰返し行い、該石膏スラリ
ーに含まれる水分をもって前記焼石膏粉が付着された織
布と石膏スラリーとの積層体を硬化一体化させたうえ母
型面から脱型することを特徴とする反転石膏モデルの製
作方法。After applying a thin layer of gypsum slurry to the surface of the matrix coated with a mold release agent, the pasting of a woven fabric to which calcined gypsum powder has been adhered and the application of the gypsum slurry are repeated alternately to the upper surface of the gypsum slurry. A method for producing an inverted plaster model, which comprises curing and integrating the laminate of the woven fabric to which the calcined gypsum powder is attached and the gypsum slurry with the moisture contained therein, and then removing the mold from the matrix surface.
JP17458084A 1984-08-21 1984-08-21 Manufacture of roll-over gypsum model Granted JPS6152958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17458084A JPS6152958A (en) 1984-08-21 1984-08-21 Manufacture of roll-over gypsum model

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17458084A JPS6152958A (en) 1984-08-21 1984-08-21 Manufacture of roll-over gypsum model

Publications (2)

Publication Number Publication Date
JPS6152958A true JPS6152958A (en) 1986-03-15
JPS622901B2 JPS622901B2 (en) 1987-01-22

Family

ID=15981037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17458084A Granted JPS6152958A (en) 1984-08-21 1984-08-21 Manufacture of roll-over gypsum model

Country Status (1)

Country Link
JP (1) JPS6152958A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0569502U (en) * 1992-02-21 1993-09-21 東洋化学株式会社 Hori Kotatsu

Also Published As

Publication number Publication date
JPS622901B2 (en) 1987-01-22

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