JPH0834077A - Rubber mold forming tool and rubber mold part in lost wax casting method - Google Patents
Rubber mold forming tool and rubber mold part in lost wax casting methodInfo
- Publication number
- JPH0834077A JPH0834077A JP20267894A JP20267894A JPH0834077A JP H0834077 A JPH0834077 A JP H0834077A JP 20267894 A JP20267894 A JP 20267894A JP 20267894 A JP20267894 A JP 20267894A JP H0834077 A JPH0834077 A JP H0834077A
- Authority
- JP
- Japan
- Prior art keywords
- rubber mold
- rubber
- joint
- mold
- parts
- 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.)
- Pending
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、宝飾品、歯科治療用品
などに広く用いられているロストワックス鋳造法におい
て、原型からワックスモデルを取るための鋳型を制作す
る際に用いる器具及び部品である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and parts used in producing a mold for taking a wax model from a prototype in a lost wax casting method which is widely used for jewelry, dental care products and the like. .
【0002】[0002]
【従来の技術】原型からワックス用鋳型を取る場合、現
在広く行われているのは、金属製などの枠の中に原型と
ワックス射出用の注入口の型の周囲に熱硬化性のシリコ
ーンゴムなどをを充填し、硬化後、メスでゴム型を二つ
に分割し、原型を取りだし、ワックスの通路を設ける方
法である。2. Description of the Related Art When a wax mold is taken from a master mold, it is widely practiced at present that a thermosetting silicone rubber is provided around a master mold and a wax injection mold in a frame made of metal or the like. It is a method of filling a wax mold, and after curing, dividing the rubber mold into two parts with a knife, taking out the master mold, and providing a wax passage.
【0003】[0003]
【発明が解決しようとする課題】この方法には主として
二つの問題があった。その一つは、メスでゴム型に切り
込みを入れて分割し、原型を取り出す作業に熟練を要す
る事である。There are mainly two problems with this method. One of them is that it takes skill to cut a rubber mold with a scalpel to divide it and take out the master mold.
【0004】もう一つの重要な問題は、一つの型が2個
のパーツに分割されており、自然の状態ではそれらが離
れてしまう事である。このため、保管、整理に不便が生
じる上、ワックスを注入する作業中、二つのパーツを
手、または機会力で押さえながら注入口をワックスの射
出口にあてがう際に、二つのパーツの位置がずれる場合
があり、ワックスモデルにもずれが生じたり、大きなバ
リも発生しがちである。結果的に作業能率が低下し、不
良品の発生率も高くなる。。Another important problem is that one mold is divided into two parts, which are naturally separated. This causes inconvenience in storage and organization, and the position of the two parts shifts when the wax injection port is applied to the wax injection port while holding the two parts by hand, or while holding the opportunity force while the wax is being injected. In some cases, the wax model may be misaligned and large burrs are likely to occur. As a result, the work efficiency is reduced and the incidence of defective products is increased. .
【0005】[0005]
【課題を解決するための手段】上記の問題は、二つのパ
ーツを正確に結合でき、着脱が容易で、結合した状態で
は自然に離れないようなジョイント部をそれぞれのパー
ツにつける事によって解決される。[Means for Solving the Problems] The above problem is solved by attaching a joint part to each part that can accurately connect the two parts, is easy to attach / detach, and does not separate naturally in the connected state. It
【0006】このジョイントは一方のパーツについた凸
部と他方のパーツにつけられた凹部とからなる(図
5)。材質がゴムで伸縮性があるために(11)のよう
に自然には抜けないような形状にする事ができる。This joint consists of a convex portion on one part and a concave portion on the other part (FIG. 5). Since it is made of rubber and has elasticity, it can be formed into a shape that does not come off naturally as in (11).
【0007】このようなジョイントをゴム型の両パーツ
に形成するには、あらかじめ一方のパーツにジョイント
部が形成され、硬化していなければならない。In order to form such a joint on both parts of the rubber type, it is necessary that a joint portion is formed on one of the parts in advance and is hardened.
【0008】また、硬化したゴム型を二つのパーツに分
割する際にナイフなどで切れ目を入れると、ジョイント
部をもカットしてしまうので、この方法はジョイントを
カットしたり傷付けたりしない範囲でしか使用する事が
できない。Further, when the cured rubber die is divided into two parts, if a cut is made with a knife or the like, the joint portion is also cut. Therefore, this method can be used only in the range where the joint is not cut or damaged. It cannot be used.
【0009】ジョイントを形成するために二とおりの能
率的な方法が考えられる。一つは、図1のように枠の中
に片方のパーツとなる部分を充填した後、図2のような
形状の器具で凹型を形成し、その部分だけを硬化させる
方法である。Two efficient methods are conceivable for forming the joint. One is a method in which, as shown in FIG. 1, a part to be one of the parts is filled in a frame, then a concave mold is formed by an instrument having a shape as shown in FIG. 2, and only that part is cured.
【0010】今一つの方法は、片方のパーツの周辺部に
あらかじめ硬化した、ジョイントを持つ枠(図4)を用
いる事である。この枠は、充填に用いるシリコーンゴム
などを硬化させたものが望ましいが、似た性質で硬化後
に一体となるものであれば充填材と同一の素材である必
要はない。Another method is to use a frame (FIG. 4) having joints pre-cured around the periphery of one of the parts. This frame is preferably made of cured silicone rubber or the like used for filling, but it does not have to be the same material as the filling material as long as it has a similar property and is integrated after curing.
【0011】ゴム型の分割にナイフによるカットを避け
るためにはシリコーンゴムなどを充填する際に、二つの
パーツの境界となる面に離型剤を付着させることで解決
する。離型剤はタルクなどの粉末の方が使いやすい。充
填材に粘着性があるために粉末が付着するが、余分な粉
末は吹き飛ばす事ができるからである。In order to avoid cutting with a knife when dividing the rubber mold, a mold release agent is attached to the surface serving as the boundary between two parts when silicone rubber or the like is filled. Powders such as talc are easier to use as the release agent. The powder adheres due to the adhesiveness of the filler, but excess powder can be blown off.
【0012】[0012]
【作用】この様にして、ゴム型が硬化したときに二つの
パーツが自然に分かれ、同時にそれらにジョイントが形
成されるようになる。このジョイントの形が(図5)の
ような膨らみとくびれを持つものであり、その数と位置
が適切であれば、両パーツが正確に結合でき、着脱が容
易で、自然に離れることもない。In this way, when the rubber mold is cured, the two parts naturally separate and at the same time a joint is formed on them. The shape of this joint has a bulge and constriction as shown in (Fig. 5), and if the number and position are appropriate, both parts can be joined accurately, can be easily attached and detached, and will not separate naturally. .
【0013】複雑な形状の原型の場合、ゴム型を三つ以
上のパーツに分割する場合がある。その場合、二つのパ
ーツの一方または双方を更に分割すればよいのであるか
ら、二つのパーツの場合と同様に処理する事ができる。In the case of a prototype having a complicated shape, the rubber mold may be divided into three or more parts. In that case, since one or both of the two parts may be further divided, the same processing as in the case of the two parts can be performed.
【0014】[0014]
【実施例】実施例1はジョイント形成器具(3)による
方法である。これは金属製の円柱の棒で、先端は球状に
近く、断面は図6のごとくである。ゴム型の枠内にゴム
型の下半分すなわちゴム型の一方のパーツとなるべき部
分を充填した後、周辺部を取り巻くようにこの器具を充
填材に差し込んでジョイントの凹部を必要十分と思われ
る数だけ形成して行く(図1)。EXAMPLE Example 1 is a method using a joint forming device (3). This is a cylindrical rod made of metal, the tip of which is close to a sphere, and the cross section is as shown in FIG. After filling the lower half of the rubber mold, that is, the part that should be one part of the rubber mold in the frame of the rubber mold, insert this device into the filling material so that it surrounds the peripheral part, and it seems that the recess of the joint is necessary and sufficient Form as many as you want (Fig. 1).
【0015】次にジョイント凹部を熱硬化させる。実施
例では60ワットの半田ごての先を図2の形に加工した
もので加熱しながら再びそれぞれのジョイントの凹部に
差し込んで接触したシリコーンゴムなど充填材の表面付
近を硬化させて行く(図3)。もちろん、同程度の温度
が得られるなら、ヒーターは半田ごてである必要はな
い。凹部の形が崩れない程度に凹部の表面付近が硬化す
れば十分である。この方法を用いる場合は最初から加熱
したジョイント形成器具で、ジョイントを形成すると同
時に硬化させてゆく事ができる。Next, the joint recess is thermally cured. In the embodiment, the tip of a 60 watt soldering iron is processed into the shape shown in FIG. 2, and while being heated, it is again inserted into the concave portion of each joint to cure the vicinity of the surface of the filler such as silicone rubber which is in contact (FIG. 3). Of course, the heater does not have to be a soldering iron as long as the same temperature can be obtained. It is sufficient that the vicinity of the surface of the recess is hardened so that the shape of the recess does not collapse. When this method is used, it is possible to cure the joint at the same time as forming the joint with a joint forming device heated from the beginning.
【0016】成型器具を差し込む際は、成型器具のくび
れ部(6)の上部が僅かにめり込むまで挿入することに
よって図5のようなくびれ部を持ったジョイント凹部が
形成される。また、くびれ部の上部のは図6のごとく、
くびれ部の下部よりも太い方がジョイント凹部のくびれ
が正確に形成される。When the molding tool is inserted, it is inserted until the upper part of the constricted part (6) of the molding tool is slightly recessed to form a joint recess having a constriction as shown in FIG. Also, the upper part of the constricted part is as shown in FIG.
The thicker the lower part of the constricted portion is, the more accurately the constricted part of the joint recess is formed.
【0017】次に充填材の表面に離型剤を付着させたの
ち、ジョイント凹部に充填材を詰め、更にゴム型の上半
分となる残りの充填材を充填し、全体を加熱硬化させ
る。離型剤はタルクなどの粉末を塗布し、余分な粉末を
吹き飛ばすのがよい。Next, after a release agent is attached to the surface of the filler, the joint recess is filled with the filler, and the remaining filler which is the upper half of the rubber mold is filled, and the whole is cured by heating. It is preferable to apply powder such as talc as the release agent and blow off excess powder.
【0018】実施例2はすでに硬化したジョイントの凹
部を持つコの字型で底部を持つパーツ(図4)を用いる
方法である。これは硬化後の充填材と一体になるもので
あるなら、必ずしも充填材と同一の素材である必要はな
い。これをゴム型成型用の枠に入れ、内部に原型、湯口
型と充填材を詰めてゴム型の下側パーツとし、後は実施
例1と同様の操作をする。Example 2 is a method of using a U-shaped bottom part (FIG. 4) having a recess of a joint which has already been hardened. This does not necessarily have to be the same material as the filler as long as it is integral with the cured filler. This is put in a frame for molding a rubber mold, and the interior of the rubber mold is filled with a master mold, a sprue mold and a filling material to form a lower part of the rubber mold, and the same operation as in Example 1 is performed thereafter.
【0019】実施例1は比較的大きな型の場合に適当な
方法であり、実施例2は比較的小さな型の場合に作業能
率を上げる事ができる。両者の併用も可能である。The first embodiment is a suitable method for a relatively large mold, and the second embodiment can improve work efficiency for a relatively small mold. Both can be used together.
【0020】[0020]
【発明の効果】以上のようにワックスのゴム型を制作す
ることにより、硬化したゴム型は自然に二つのパーツか
ら構成された状態で完成し、メスなどで切り込みを入れ
て原型を取り出す作業が不要になるか、大幅に削減され
る。EFFECTS OF THE INVENTION By producing a wax rubber mold as described above, a cured rubber mold is naturally completed in a state of being composed of two parts, and it is possible to make a notch with a knife or the like and take out the master mold. No longer needed or significantly reduced.
【0021】更に、ゴム型の二つのパーツは簡単に着脱
でき、かつ正確に結合してメスで切り込みを入れた場合
のように自然に離れる事もないのでワックス射出成型作
業の能率が向上し、またゴム型の整理保管の能率も向上
する。Furthermore, since the two rubber-type parts can be easily attached and detached, and they are not accurately separated from each other as they are when they are accurately joined and cut with a knife, the efficiency of the wax injection molding work is improved, Also, the efficiency of organizing and storing rubber molds is improved.
【図1】ゴム型の下半分の充填材と原型を充填した後、
ジョイント成型器具を使用している所を示す図である。FIG. 1 After filling the lower half of the rubber mold with the prototype,
It is a figure which shows the place using the joint molding tool.
【図2】ジョイント成型器具の形状を示す図である。FIG. 2 is a view showing the shape of a joint molding tool.
【図3】半田ごてに取り付けたジョイント成型器具で、
充填材のジョイント部を硬化させているところを示す図
である。[Fig. 3] With a joint molding tool attached to a soldering iron,
It is a figure which shows the place which is hardening the joint part of a filler.
【図4】ジョイント凹部を持つゴム型パーツを示す図で
ある。FIG. 4 is a diagram showing a rubber mold part having a joint recess.
【図5】完成したゴム型の上下パーツの周辺部の断面を
示す図である。FIG. 5 is a view showing a cross section of the peripheral part of the completed rubber mold upper and lower parts.
【図6】ジョイント形成機具先端の実施例の断面図を示
す図である。FIG. 6 is a view showing a cross-sectional view of an embodiment of the tip of the joint forming device.
1 ゴム型成型枠 2 シリコーンゴム充填材 3 ジョイント成型器具 4 湯口型 5 原型 6 ジョイント形成器具のくびれ部 7 半田ごて 8 ジョイント凹部 9 ゴム型下側パーツ 10 ゴム型上側パーツ 11 ジョイント凸部 12 ジョイントくびれ部 1 Rubber Mold Molding Frame 2 Silicone Rubber Filler 3 Joint Molding Tool 4 Gate Model 5 Constriction 6 Joint Forming Tool 7 Soldering Iron 8 Joint Recess 9 Rubber Mold Lower Part 10 Rubber Mold Upper Part 11 Joint Convex 12 Joint Constriction
Claims (3)
(6)を持つ形状の、ワックスモデルのゴム型のジョイ
ント形成器具。1. A wax-type rubber-type joint forming device made of metal or ceramic and having a constricted portion (6).
(7)に着脱可能な請求項1のジョイント形成器具。2. The joint forming device according to claim 1, which is integrated with a heater or is detachable from the heater.
と底部を構成する形状で、1個以上の、くびれ部(1
2)を持つ形状のジョイントの凹部を持ち、充填材の硬
化時にゴム型と一体になる素材のゴム型部品(図4)。3. A rubber mold having a shape forming a part of the peripheral portion or a part of the peripheral portion and the bottom portion, and one or more constricted portions (1
2) A rubber mold part made of a material that has a concave portion of a joint having a shape and is integrated with the rubber mold when the filling material is cured (Fig. 4).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20267894A JPH0834077A (en) | 1994-07-25 | 1994-07-25 | Rubber mold forming tool and rubber mold part in lost wax casting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20267894A JPH0834077A (en) | 1994-07-25 | 1994-07-25 | Rubber mold forming tool and rubber mold part in lost wax casting method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0834077A true JPH0834077A (en) | 1996-02-06 |
Family
ID=16461348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20267894A Pending JPH0834077A (en) | 1994-07-25 | 1994-07-25 | Rubber mold forming tool and rubber mold part in lost wax casting method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0834077A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009061471A (en) * | 2007-09-06 | 2009-03-26 | Yoshimoto Nakajima | Recombination type molding flask by grooved square rod for producing rubber mold used for producing wax mold for metal molding |
-
1994
- 1994-07-25 JP JP20267894A patent/JPH0834077A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009061471A (en) * | 2007-09-06 | 2009-03-26 | Yoshimoto Nakajima | Recombination type molding flask by grooved square rod for producing rubber mold used for producing wax mold for metal molding |
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