JPH047926Y2 - - Google Patents
Info
- Publication number
- JPH047926Y2 JPH047926Y2 JP1986188182U JP18818286U JPH047926Y2 JP H047926 Y2 JPH047926 Y2 JP H047926Y2 JP 1986188182 U JP1986188182 U JP 1986188182U JP 18818286 U JP18818286 U JP 18818286U JP H047926 Y2 JPH047926 Y2 JP H047926Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- core mold
- air
- ceramic
- core
- 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
- 239000000919 ceramic Substances 0.000 claims description 22
- 238000007664 blowing Methods 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 19
- 230000035699 permeability Effects 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 2
- 239000010408 film Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000011505 plaster Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012805 post-processing 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
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、比較的肉厚の厚い中空セラミツクス
素地体の成形に用いられるセラミツクス鋳込用型
に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a ceramic casting mold used for molding a relatively thick hollow ceramic body.
（従来の技術）
中子型を用いる中空セラミツク素地体の鋳込成
形においては、鋳込まれたセラミツクスの泥漿は
水分を失つて固化する際にわずかに収縮して中子
型の表面に強固に密着するうえ、泥漿の種類によ
つては中子型表面に粘着し、中子型を引抜くこと
が困難な場合がある。このため、一般に中子型に
は抜け勾配を付して成形後の引抜きを容易化して
いるが、パイプのような均一な内径の中空部を持
つ中空セラミツクス素地体を成形したい場合に
は、テーパ状に成形された内面を後加工により円
筒状の内面に修正しなければならない欠点があつ
た。そこでこのような場合には強度の小さい材料
で中子型を製作しておき成形後に中子型を破壊し
て成形体を取出す方法や、薬品その他により崩壊
し易い材料で中子型を製作しておき成形後に中子
型を崩壊させて成形体を取出す方法が採用されて
いるが、このような方法においては中子型を繰返
して使用することができず、その都度中子型を製
作しなければならない欠点があつた。(Prior art) In casting a hollow ceramic body using a core mold, the slurry of the cast ceramic loses water and solidifies, shrinking slightly and firmly attaching to the surface of the core mold. In addition to adhesion, depending on the type of slurry, it may stick to the surface of the core mold, making it difficult to pull out the core mold. For this reason, the core mold is generally provided with a draft slope to make it easier to pull out after molding. The disadvantage was that the shaped inner surface had to be modified into a cylindrical inner surface through post-processing. Therefore, in such cases, it is recommended to make a core mold using a material with low strength and then destroy the core mold after molding to take out the molded product, or to make a core mold using a material that easily disintegrates due to chemicals or other factors. A method is adopted in which the core mold is collapsed after molding and the molded product is removed, but in this method, the core mold cannot be used repeatedly, and a core mold must be manufactured each time. There were some flaws that I had to deal with.
（考案が解決しようとする課題）
本考案は上記のような従来の問題点を解決し
て、同一の中子型を繰返し使用して均一な内径の
中空部を持つセラミツクス素地体を多数個鋳込成
形することができるセラミツクス鋳込用型を目的
として完成されたものである。(Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems by repeatedly using the same core mold to cast a large number of ceramic bodies each having a hollow portion with a uniform inner diameter. It was completed for the purpose of making a ceramic casting mold that could be used for injection molding.
（課題を解決するための手段）
前記のような課題を解決しようとする本考案の
セラミツクス鋳込用型は、側型と中子型との間に
形成される空〓部に泥漿を流し込んで中空セラミ
ヨクス素地体を成形するセラミツクス鋳込用型で
あつて、前記中子型は0.03c.c.／分以上の通気度を
有する連続気孔を持つた多孔質体からなり、端面
の空気吹込部から軸方向に延びる中空部が内部に
形成されたものであり、この中子型が空気吹込部
より空気を吹き込みつつ引き抜けるように側型に
組み合わされていることを特徴とするものであ
る。(Means for Solving the Problems) The ceramic casting mold of the present invention, which attempts to solve the above-mentioned problems, consists of pouring slurry into the cavity formed between the side mold and the core mold. A ceramic casting mold for forming a hollow ceramic body, the core mold being made of a porous body with continuous pores having an air permeability of 0.03 cc/min or more, and extending in the axial direction from the air blowing part on the end face. A hollow part extending from the inside is formed, and the core mold is combined with the side mold so that it can be pulled out while blowing air from the air blowing part.
本考案において用いられる中子型は0.03c.c.／分
以上の通気度を持つせつこう、プラスチツクス、
焼結金属等の多孔質の材料からなるものであり、
その端面には中子型に軸方向に形成されている中
空部に空気を吹込むための空気吹込部が形成され
ていて空気吹込部より空気を吹き込みつつ引き抜
けるように側型に組み合わされている。 The core mold used in this invention is made of plaster, plastic, etc. with an air permeability of 0.03 cc/min or more.
It is made of porous material such as sintered metal,
An air blowing part for blowing air into the hollow part formed in the axial direction of the core mold is formed on the end face thereof, and the core mold is combined with the side mold so that it can be pulled out while blowing air from the air blowing part.
なお、通気度（Ｐ）は次式によつて定義され
る。 Note that the air permeability (P) is defined by the following equation.
Ｐ＝ｖ×ｈ／ａ×Ｐ×ｔ
ここでｖ：通過空気量（cm3）
ｈ：試料の長さ（cm）
ａ：断面積（cm2）
ｐ：圧力差（水柱cm）
ｔ：時間（分）
（作用）
このようなセラミツクス鋳込用型は、中子型を
側型の内部にセツトしたうえ、中子型と側型との
間のキヤビテイ部に泥漿の鋳込みを行えば、鋳込
まれた泥漿が中子型と側型との間に形成される所
定厚さのキヤビテイ部において成形固化されるか
ら、固化後は端面の空気吹込部より中子型に軸方
向に形成されている中空部に0.1〜10Kgｆ／cm2程
度の圧力の加圧空気を吹込めば、前述のように中
子型は0.03c.c.／分以上の通気度を持つものである
から、中空部に吹込まれた加圧空気によつて中子
型の内部の水分が中子型の表面に移行し、成形体
と中子型との間に薄い水と空気との膜を形成す
る。そして、この膜が潤滑膜として作用し中子型
と成形体との間の離型性を著しく向上させるの
で、加圧空気を吹込みつつ中子型を成形体から引
抜けば、中子型に抜け勾配が形成されていない場
合でも中子型は容易に引抜きできるから、後は側
型を外せばよい。なお、本考案において中子型の
通気度を0.03c.c.／分以上としたのは、これ未満で
は離型面に十分な潤滑膜が形成されず、脱型がで
きなくなるためである。 P=v×h/a×P×t where v: Passing air volume (cm 3 ) h: Sample length (cm) a: Cross-sectional area (cm 2 ) p: Pressure difference (water column cm) t: Time (Minutes) (Function) This type of ceramic casting mold can be cast by setting the core mold inside the side mold and pouring slurry into the cavity between the core mold and the side mold. The poured slurry is molded and solidified in the cavity part of a predetermined thickness formed between the core mold and the side mold, so that after solidification, it is formed in the axial direction from the air blowing part on the end face to the core mold. If pressurized air with a pressure of about 0.1 to 10 Kgf/ cm2 is blown into the hollow part, since the core mold has an air permeability of 0.03 cc/min or more as mentioned above, the air will be blown into the hollow part. Moisture inside the core mold is transferred to the surface of the core mold by the pressurized air, and a thin film of water and air is formed between the molded body and the core mold. This film acts as a lubricating film and significantly improves the releasability between the core mold and the molded body, so if the core mold is pulled out from the molded body while blowing pressurized air, the core mold Since the core mold can be easily pulled out even if no draft slope is formed, all that is required is to remove the side molds. The reason why the air permeability of the core mold is set to 0.03 cc/min or more in the present invention is that if it is less than this, a sufficient lubricant film will not be formed on the mold release surface, making demolding impossible.
このように本考案によれば、中子型表面に形成
される潤滑膜を利用して抜け勾配のない中子型で
も成形体から引抜くことができるので、同一の中
子型を用いて均一な内径を持つ中空セラミツクス
素地体を鋳込成形法によつて多数個成形すること
ができる。 In this way, according to the present invention, even a core mold with no draft angle can be pulled out from a molded body by using the lubricating film formed on the surface of the core mold. A large number of hollow ceramic bodies having a certain inner diameter can be formed by casting.
次に本考案の好ましい実施例を示す。 Next, preferred embodiments of the present invention will be described.
（実施例）
実施例 １
出願人会社からＣ−2000の品番で販売されてい
る焼せつこうにより第１図に示される分割式の側
型１を形成した。一方、錆付くことのない多孔質
パイプの１つである多数の透孔を持つ直径６mmの
ガラスチユーブ２のまわりに出願人会社からＣ−
300Cの品番で販売されている焼せつこうのスラ
リーを流し込み、硬化させた後にガラスチユーブ
２の端部の空気吹込部３から３Kgｆ／cm2の加圧空
気を吹込んで通気性のある中子型４を製作した。
中子型４は120mmにわたり全く抜け勾配のないス
トレート部分を持つ断面円形の柱状のもので、そ
の通気度は0.15c.c.／分であつた。側型１の鋳込口
５、鋳込湯道６等には吸水性を止めるための防水
塗料又はエポキシ樹脂塗料が塗布されている。次
いで、中子型４を所定位置に挿入して左右の側型
１をしやこ万力により強固に固定した。この状態
で鋳込口５から市販の陶磁器泥漿を中子型４の周
囲の空洞部７に鋳込み、60分間放置して固化させ
た。その後、中子型４の空気吹込部３にホースを
接続して0.5〜1.0Kgｆ／cm2の加圧空気を中子型４
の内部に吹込みつつ中子型４を第１図の左側から
右方に押出せば、中子型４は容易に成形体から抜
出されたので、その後分割式の側型１を外して成
形体を取出した。この成形体を常法により焼成後
に中子型抜きした内周面を観察したところ平滑性
は良好でクラツクの発生も認められなかつた。(Examples) Example 1 A split-type side mold 1 shown in FIG. 1 was formed using calcined plaster sold by the applicant company under the product number C-2000. On the other hand, a C-
After pouring a calcined plaster slurry sold under the product number 300C and hardening it, pressurized air of 3 kgf/cm 2 is blown from the air blowing part 3 at the end of the glass tube 2 to create a breathable core mold. I made 4.
Core type 4 had a columnar shape with a circular cross section and a straight section with no draft over 120 mm, and its air permeability was 0.15 cc/min. The casting port 5, casting runner 6, etc. of the side mold 1 are coated with waterproof paint or epoxy resin paint to prevent water absorption. Next, the core mold 4 was inserted into a predetermined position, and the left and right side molds 1 were firmly fixed in a vice. In this state, commercially available ceramic slurry was poured into the cavity 7 around the core mold 4 through the pouring port 5, and left to solidify for 60 minutes. After that, connect a hose to the air blowing part 3 of the core mold 4 and supply pressurized air of 0.5 to 1.0 Kgf/cm 2 to the core mold 4.
By extruding the core mold 4 from the left side to the right side in Fig. 1 while blowing into the inside of the mold, the core mold 4 was easily pulled out from the molded body, and then the split type side mold 1 was removed. The molded body was taken out. When this molded body was fired in a conventional manner and then the core was cut out, the inner circumferential surface was observed, and the smoothness was good and no cracks were observed.
実施例 ２
アイエヌ・テクニカルラボ社からインキヤスト
TR−100の品名で市販されているエポキシ樹脂
100（重量）部と、同じくTH−104の品名で市販
されているエポキシ樹脂硬化剤30部に、硅石粉
（100メツシユ50％）100部と水50部とを加えて樹
脂配合混合スラリーとし、これを通気孔のある直
径６mmのガラスチユーブ２の周囲に流し込み固化
させ、空気吹込部３から１〜３Kgｆ／cm2の加圧空
気を吹込んで第２図に示されるとおりの円柱形で
通気性と吸水性のある中子型４を製作した。中子
型４の通気度は0.06c.c.／分であつた。これを出願
人会社からＣ−300Cの品番で市販されている焼
せつこう製の不分割式の側型１の内部にセツト
し、しやこ万力で固定した。なお側壁１の内部に
もスパイラル状に空気孔８が形成してある。この
ような側型１と中子型４との間に形成されたキヤ
ビテイ部７に側型１の鋳込口５から99％純度のア
ルミナ泥漿を５Kgｆ／cm2の加圧下で鋳込み、約60
分間加圧を続けて凝固させた。次に、中子型４の
内部に1.0〜2.0Kgｆ／cm2の加圧空気を吹込みつつ
中子型４をゆつくりと引抜いた。その後成形体を
1700℃で焼成し、中子型抜きした内周面の平滑
性、クラツクの有無等を観察したところ、実施例
１と同様に極めて良好であつた。Example 2 Ink cast from NI Technical Lab Co., Ltd.
Epoxy resin commercially available under the product name TR-100
Add 100 parts (by weight) of silica powder (100 mesh 50%) and 50 parts of water to 30 parts of an epoxy resin curing agent, which is also commercially available under the product name TH-104, to make a resin mixture slurry. This is poured around a glass tube 2 with a diameter of 6 mm that has ventilation holes, and is solidified. Pressurized air of 1 to 3 Kgf/cm 2 is blown into it from the air blowing part 3 to create a cylindrical shape with air permeability as shown in Figure 2. A core mold 4 with water absorption properties was manufactured. The air permeability of core mold 4 was 0.06 cc/min. This was set inside an indivisible side mold 1 made of calcined plaster commercially available from the applicant's company under the product number C-300C, and fixed in a vice. Note that an air hole 8 is also formed inside the side wall 1 in a spiral shape. Alumina slurry of 99% purity is poured into the cavity 7 formed between the side mold 1 and the core mold 4 from the casting port 5 of the side mold 1 under a pressure of 5 kgf/cm 2 .
Pressure was continued for several minutes to solidify. Next, the core mold 4 was slowly pulled out while blowing pressurized air of 1.0 to 2.0 Kgf/cm 2 into the core mold 4 . Then the molded body
After firing at 1700°C, the inner circumferential surface of the core die was examined for smoothness, presence of cracks, etc., and as in Example 1, it was found to be extremely good.
（考案の効果）
本考案は以上の説明からも明らかなように、中
子型を0.03c.c.／分以上の通気度の連続気孔を持つ
た多孔質体からなるものとするとともにその端面
に空気吹込部を形成し且つこの中子型を空気吹込
部より空気を吹き込みつつ引き抜けるように側型
に組み合わせることにより、従来は引抜きができ
なかつた抜け勾配を持たない中子型をも成形体か
ら円滑に引抜くことができるようにしたものであ
つて、本考案によりはじめて同一の中子型を繰返
し使用して均一な内径を持つ中空セラミツク体を
多数個成形くることができる。(Effects of the invention) As is clear from the above explanation, the present invention uses a core mold made of a porous body having continuous pores with an air permeability of 0.03 cc/min or more, and air is blown into the end face of the core mold. By forming a part and combining this core mold with a side mold so that it can be pulled out while blowing air from the air blowing part, it is possible to smoothly pull out a core mold that does not have a draft angle from the molded product, which was previously impossible. It is designed to be able to be drawn out, and for the first time with the present invention, it is possible to repeatedly use the same core mold to mold a large number of hollow ceramic bodies with uniform inner diameters.
従つて、本考案は従来の問題点を解決した中空
セラミツク体製造用のセラミツクス鋳込用型とし
て、その実用的価値は極めて大である。 Therefore, the present invention has extremely great practical value as a ceramic casting mold for manufacturing hollow ceramic bodies that solves the problems of the conventional art.
第１図は本考案の第１の実施例を示す断面図、
第２図は第２の実施例を示す断面図である。
１……側型、４……中子型。
FIG. 1 is a sectional view showing a first embodiment of the present invention;
FIG. 2 is a sectional view showing the second embodiment. 1... Side type, 4... Core type.
Claims (1)
テイ部に泥漿を流し込んで中空セラミツクス素
地体を成形するセラミツクス鋳込用型であつ
て、前記中子型４は0.03c.c.／分以上の通気度を
有する連続気孔を持つた多孔質体からなり、端
面の空気吹込部３から軸方向に延びる中空部が
内部に形成されたものであり、この中子型４が
空気吹込部３より空気を吹き込みつつ引き抜け
るように側型１に組み合わされていることを特
徴とするセラミツクス鋳込用型。 ２ 側型１が分割式である請求項１に記載のセラ
ミツクス鋳込用型。 ３ 中空部が通気孔のあるガラスチユーブ２によ
り形成されている請求項１または２に記載のセ
ラミツクス鋳込用型。 ４ 中子型４が抜け勾配のないストレート状のも
のである請求項１または２または３に記載のセ
ラミツクス鋳込用型。 ５ 側型１の鋳込口５、鋳込湯道６に吸水性を止
めるため塗料が塗布されている請求項１または
２または３または４に記載のセラミツクス鋳込
用型。[Claims for Utility Model Registration] 1. A ceramic casting mold for forming a hollow ceramic body by pouring slurry into a cavity formed between a side mold 1 and a core mold 4, which The mold 4 is made of a porous body with continuous pores having an air permeability of 0.03 cc/min or more, and has a hollow part formed therein that extends in the axial direction from the air blowing part 3 on the end face. A ceramic casting mold characterized in that a mold 4 is combined with a side mold 1 so as to be pulled out while blowing air from an air blowing part 3. 2. The ceramic casting mold according to claim 1, wherein the side mold 1 is of a split type. 3. The ceramic casting mold according to claim 1 or 2, wherein the hollow portion is formed by a glass tube 2 having a ventilation hole. 4. The ceramic casting mold according to claim 1, 2 or 3, wherein the core mold 4 has a straight shape with no draft. 5. The ceramic casting mold according to claim 1, 2, 3 or 4, wherein the casting port 5 and the casting runner 6 of the side mold 1 are coated with paint to prevent water absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986188182U JPH047926Y2 (en) | 1986-12-05 | 1986-12-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986188182U JPH047926Y2 (en) | 1986-12-05 | 1986-12-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6392706U JPS6392706U (en) | 1988-06-15 |
| JPH047926Y2 true JPH047926Y2 (en) | 1992-02-28 |
Family
ID=31139307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986188182U Expired JPH047926Y2 (en) | 1986-12-05 | 1986-12-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH047926Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5342609Y2 (en) * | 1974-08-23 | 1978-10-13 |
-
1986
- 1986-12-05 JP JP1986188182U patent/JPH047926Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6392706U (en) | 1988-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4808360A (en) | Method of producing mold for slip casting and method of molding slip casting | |
| KR890008058A (en) | Flexible floor | |
| JPH047926Y2 (en) | ||
| JPH0371973B2 (en) | ||
| JPH0323903A (en) | Porous gypsum mold and manufacture thereof | |
| JP3281769B2 (en) | Method of forming hollow ceramic body | |
| JPH0533123B2 (en) | ||
| JPS62148211A (en) | Manufacture of ceramic molded shape | |
| JPH07112617B2 (en) | Casting method for double layer casting | |
| JPS63248554A (en) | Sand core for pressure casting | |
| JPS61112602A (en) | Mold for molding ceramics | |
| JPH0335469Y2 (en) | ||
| JPS63264259A (en) | Sand core for pressure casting | |
| JPS6334944Y2 (en) | ||
| JP2518574B2 (en) | Pressure casting mold | |
| JPH085048B2 (en) | Method for producing porous molding die having two-layer structure for ceramics molding | |
| JPH01297209A (en) | Slip casting mold | |
| JPH0735528B2 (en) | Lance pipe refractory coating method | |
| JPH02169145A (en) | Collapsible mold | |
| JPS6371305A (en) | Method of molding mold cavity for thickening molding | |
| JPS6280002A (en) | Method of molding powdered body | |
| Schneider | Annual Review of Mechanization of Mold and Core Production. XXV | |
| JPS57118854A (en) | Production of fiber reinforced composite body | |
| JPS61112603A (en) | Mold for molding ceramics | |
| JPS60154007A (en) | Manufacture of ceramic molding |