JPH0150561B2 - - Google Patents
Info
- Publication number
- JPH0150561B2 JPH0150561B2 JP6331984A JP6331984A JPH0150561B2 JP H0150561 B2 JPH0150561 B2 JP H0150561B2 JP 6331984 A JP6331984 A JP 6331984A JP 6331984 A JP6331984 A JP 6331984A JP H0150561 B2 JPH0150561 B2 JP H0150561B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- slip
- molding method
- slip casting
- water
- 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
- 238000000465 moulding Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- 238000007569 slipcasting Methods 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 13
- 239000003232 water-soluble binding agent Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 3
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 229910052845 zircon Inorganic materials 0.000 claims description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 229910000404 tripotassium phosphate Inorganic materials 0.000 claims description 2
- 235000019798 tripotassium phosphate Nutrition 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims 2
- 239000010452 phosphate Substances 0.000 claims 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- 125000005587 carbonate group Chemical group 0.000 claims 1
- 150000001805 chlorine compounds Chemical group 0.000 claims 1
- 229910001629 magnesium chloride Inorganic materials 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 claims 1
- 229910000027 potassium carbonate Inorganic materials 0.000 claims 1
- 239000001488 sodium phosphate Substances 0.000 claims 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims 1
- 235000019801 trisodium phosphate Nutrition 0.000 claims 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 8
- 238000004898 kneading Methods 0.000 description 5
- 239000011505 plaster Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- -1 (Na 3 PO 4 ) Chemical compound 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- LEAHFJQFYSDGGP-UHFFFAOYSA-K trisodium;dihydrogen phosphate;hydrogen phosphate Chemical class [Na+].[Na+].[Na+].OP(O)([O-])=O.OP([O-])([O-])=O LEAHFJQFYSDGGP-UHFFFAOYSA-K 0.000 description 1
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は例えばセラミツク粒、金属粒、炭素粒
などの耐火性粒子のスリツプ（泥しよう）を鋳込
んで成形品を造るスリツプキヤステイング成形法
及び成形用鋳型に係り、特に複雑形状の成形品を
造るに好適な成形法及び成形用鋳型に関する。Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to a slip casting molding method in which a molded product is made by casting a slip of refractory particles such as ceramic grains, metal grains, carbon grains, etc. The present invention relates to a forming mold, and particularly to a forming method and a forming mold suitable for producing molded products with complex shapes.
スリツプキヤステイング法で得られるグリーン
ボデイは強度が弱いので、鋳型から離型が難し
い。特に形状が複雑なグリーンボデイを得ること
や内部に空間を有する形状品の成形は鋳型の分
割、鋳型の除去方法等の制約がある。
The green body obtained by the slip casting method has low strength, so it is difficult to release it from the mold. In particular, when it comes to obtaining a green body with a complex shape or molding a shaped product with an internal space, there are restrictions such as mold division and mold removal methods.
スリツプ鋳込み後の鋳型を除去する方法には例
えば特公昭58―125658号公報に開示されるように
鋳型を組込んだまま焼結し、崩壊除去する方法が
あるが、鋳型に組込んだまま大気中放置、乾燥す
るため、また、鋳型を組込んだまま焼結するた
め、形状が複雑なものでは乾燥時、および焼結時
に生じる鋳型および成形品の収縮、変形により、
成形品に割れが生じる。また、この引例は中子鋳
型の使用を想定したものではない。 There is a method for removing the mold after slip casting, for example, as disclosed in Japanese Patent Publication No. 58-125658, in which the mold is sintered with the mold still in place and then disintegrated and removed. Because the product is left to dry and is sintered with the mold still in place, if the shape is complex, shrinkage and deformation of the mold and molded product may occur during drying and sintering.
Cracks occur in the molded product. Furthermore, this reference does not assume the use of core molds.
一方、特開昭57―176107号公報に開示されるよ
うに温水崩壊性石膏鋳型にスリツプを流し込み、
固化させた成形品と鋳型を約85℃以上の温水に浸
漬して、石膏鋳型に除去する方法もあるが、浸漬
中に成形品が崩壊しないよう結合剤を添加してお
り、これが成形品の機械的性質に影響を与えるこ
ともあり、また奥部まで温水で崩壊させるには長
時間を要する。 On the other hand, as disclosed in Japanese Unexamined Patent Publication No. 176107/1983, a slip is poured into a hot water disintegrating plaster mold,
Another method is to immerse the solidified molded product and mold in hot water of approximately 85°C or higher and remove it to a plaster mold, but a binder is added to prevent the molded product from collapsing during the soaking, and this prevents the molding from collapsing. It may affect the mechanical properties, and it takes a long time to disintegrate deep inside with hot water.
また、この例も中子を用いる場合には適当でな
い。 Further, this example is also not suitable when using a core.
本発明は上記に鑑み、形状が複雑な成形体すな
わち形状が複雑な中子もしくは主型を必要とする
成形体をスリツプキヤステイングで成形する場合
においても、中子もしくは主型の除去が容易なス
リツプキヤステイング用鋳型を提供することを目
的とする。
In view of the above, the present invention provides a method for easily removing the core or main mold even when molding a molded object with a complicated shape, that is, a molded object that requires a core or main mold with a complicated shape, by slip casting. The purpose of the present invention is to provide a mold for slip casting.
本発明の成形法は鋳型内にスリツプを鋳込み、
スリツプの固化後に鋳型に除去する成形法におい
て、前記鋳型を水溶性の粘結剤で造型することを
特徴とするものである。
The molding method of the present invention involves casting a slip into a mold,
A molding method in which the slip is removed into a mold after solidification, characterized in that the mold is molded with a water-soluble binder.
また、本発明の鋳型は鋳型内にスリツプを鋳込
み、スリツプの固化後に鋳型を除去する鋳型にお
いて、前記鋳型が常温で水溶性の粘結剤で造型し
たものであることを特徴とする。 Further, the mold of the present invention is a mold in which a slip is cast into the mold and the mold is removed after the slip has solidified, and the mold is characterized in that the mold is molded using a water-soluble binder at room temperature.
鋳型骨材にはスリツプの溶剤に不溶性または難
溶性粒子たとえばアルミナ（Al2O3）、マグネシ
ヤ（MgO）、ジルコンサンド、珪砂などの粒子を
用い、また水溶性粘結剤としては炭酸ナトリウム
（Na2CO3）、炭酸カリウム（K2CO3）などの炭酸
塩、塩化ナトリウム（NaCl）、塩化カリウム
（KCl）、塩化マグネシウム（MgCl2）、塩化リチ
ウム（LiCl）などの塩化物、燐酸３ナトリウム
（Na3PO4）、燐酸３カリウム（K3PO4）、燐酸水
素２カリウム（K2HPO4）などの燐酸塩などを用
いる。 Particles insoluble or poorly soluble in the slip solvent, such as alumina (Al 2 O 3 ), magnesia (MgO), zircon sand, and silica sand, are used as the mold aggregate, and sodium carbonate (Na) is used as the water-soluble binder. 2 CO 3 ), carbonates such as potassium carbonate (K 2 CO 3 ), chlorides such as sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl 2 ), lithium chloride (LiCl), trisodium phosphate Phosphates such as (Na 3 PO 4 ), tripotassium phosphate (K 3 PO 4 ), and dipotassium hydrogen phosphate (K 2 HPO 4 ) are used.
骨材、粘結剤及び水の混合割合は鋳型強度、経
済性の面から骨材；50〜95重量％、粘結剤と水；
５〜50重量％にするのが好ましい。 The mixing ratio of aggregate, binder and water is 50-95% by weight, binder and water from the viewpoint of mold strength and economy.
Preferably, the amount is 5 to 50% by weight.
粘結剤の添加量は多い程、鋳型強度が安定し、
鋳型表面の安定性も向上し、取扱いは容易とな
る。しかし、スリツプからの吸水による鋳型強度
の低下を目的とした本発明では、必要以上の高強
度は好ましくない。粘結剤を過剰に添加すると乾
燥時に鋳型の表面肌荒れが認められるので47％以
上の添加は好ましくない。また2.0％以下の粘結
剤量では鋳型強度が不足し、実用的でない。他
方、水分の添加量は鋳型作業時の作業性、鋳型表
面の安定性に影響を与える。とくに水分量が骨材
を含めた全重量に対して３％以下になると鋳型作
製が困難となる。 The greater the amount of binder added, the more stable the mold strength becomes.
The stability of the mold surface is also improved, making handling easier. However, in the present invention, which aims to reduce mold strength due to water absorption from the slip, unnecessarily high strength is not preferred. If the binder is added in excess, the surface of the mold will become rough when drying, so it is not preferable to add more than 47% of the binder. Furthermore, if the amount of binder is less than 2.0%, the mold strength will be insufficient, making it impractical. On the other hand, the amount of water added affects the workability during mold work and the stability of the mold surface. In particular, when the water content is less than 3% of the total weight including aggregate, it becomes difficult to produce a mold.
従つて、粘結剤と水の和は全重量に対して５〜
50重量％が適正である。 Therefore, the sum of binder and water is 5 to 50% of the total weight.
50% by weight is appropriate.
また、薄肉の鋳型ではスリツプ中の水量のみで
鋳型を崩壊できるが、厚肉のもので崩壊に必要な
水量を得ることができないものでは肉厚を薄くす
ることが好ましい。このため厚肉中子では内部に
空洞を設けるとよい。 Further, in the case of a thin-walled mold, it is possible to collapse the mold with only the amount of water in the slip, but in the case of a thick-walled mold in which it is impossible to obtain the amount of water necessary for collapse, it is preferable to reduce the wall thickness. For this reason, it is preferable to provide a cavity inside the thick-walled core.
本発明において、水溶性粘結剤で粒子を固めて
造型した鋳型にスリツプを鋳込み、鋳型がスリツ
プ中の水分を吸収してスリツプが固化し、同時に
鋳型が崩壊容易になる現象および複雑形状の成形
が可能な理由は次のとおりである。 In the present invention, a slip is cast into a mold made by hardening particles with a water-soluble binder, and the mold absorbs moisture in the slip, solidifying the slip, and at the same time, the phenomenon that the mold collapses easily and the molding of complex shapes. The reason why this is possible is as follows.
第１図ａ，ｂ，ｃに示すように、鋳型骨材中の
粒子１は未乾燥の状態では水溶性粘結剤２で被覆
されているが（ａ参照）乾燥され硬化した鋳型で
は水分は蒸発して内部に微細な空孔３が形成さ
れ、このような鋳型にスリツプを鋳込むとスリツ
プ中の水分（その他溶液も含む）は空孔３内に浸
入して水溶性粘結剤２の粘結力を弱め、各粒子１
を独立させる（ｃ参照）。この結果、強度の低い
除去容易な鋳型が生成し、他方スリツプは水分を
放出してグリーンボデイが生成する。成形品が複
雑なために鋳型も複雑な場合や、また中子を用い
る場合でも奥部まで各部等しくスリツプから崩壊
に必要な水分を吸収し各部均等に崩壊可能とな
る。 As shown in Figure 1 a, b, and c, particles 1 in the mold aggregate are coated with water-soluble binder 2 in the undried state (see a), but in the dried and hardened mold, moisture is removed. The evaporation forms fine pores 3 inside the slip, and when the slip is cast into such a mold, the moisture in the slip (including other solutions) enters into the pores 3 and the water-soluble binder 2 is dissolved. Weaken the cohesive force, each particle 1
(see c). This results in a mold that is less strong and easier to remove, while the slip releases moisture and produces a green body. Even if the mold is complicated because the molded product is complex, or even if a core is used, each part can absorb the moisture necessary for collapse from the slip equally to the inner part, allowing each part to collapse evenly.
鋳型はスリツプ中の水分を吸収するに従いスリ
ツプの接触界面より崩壊可能な鋳型に移行する
が、他方スリツプは水分を放出するに従い収縮、
変形量を増加し、グリーンボデイの生成に至る。
しかるに本発明においては、水分の吸収に伴つ
て、鋳型表面（スリツプとの界面）は軟化するの
でグリーンボデイの生成過程で発生する収縮、変
形を鋳型は阻害しない。このために割れの発生が
認められないグリーンボデイを得ることができ
る。 As the mold absorbs moisture in the slip, it becomes a collapsible mold from the contact interface of the slip, but on the other hand, as the slip releases moisture, it shrinks.
The amount of deformation is increased, leading to the generation of a green body.
However, in the present invention, as the mold surface (interface with the slip) softens as moisture is absorbed, the mold does not inhibit shrinkage and deformation that occur during the green body production process. Therefore, a green body without any cracks can be obtained.
また鋳型は吸水により強度が低下しているので
鋳型の除去が極めて容易になり、特に中子を必要
とする形状や複雑形状のグリーンボデイの成形が
可能となる。なお、一度軟化し崩壊容易となつた
鋳型は加熱しない限り再び硬化することはない。 Furthermore, since the strength of the mold is reduced due to water absorption, the mold can be removed extremely easily, making it possible to mold green bodies that require a core or have complex shapes. Note that once the mold has softened and becomes easily disintegrated, it will not harden again unless it is heated.
鋳型の軟化はスリツプの固化と同時に進行する
から従来法のように焼結後に水もしくは温水に浸
漬する作業を付加する必要はなくなり、このため
除去に要する時間も短縮できる。 Since the softening of the mold progresses simultaneously with the solidification of the slip, there is no need to add the work of immersing it in water or hot water after sintering, which is required in the conventional method, and therefore the time required for removal can be shortened.
なお、鋳型の造型は耐火性粒子、水溶性粘結剤
及び水の混練物をつき固めて行われるか、鋳型材
料に流動性を付与すれば造型時間を短縮できる。
流動性を付与するには常温で水和物の形が安定な
水溶性粘結剤のアルコール溶液をつくり、これに
結晶水として固定されるに必要な量もしくはそれ
より少量の水を添加するとよい。 The mold can be formed by compacting a mixture of refractory particles, a water-soluble binder, and water, or by imparting fluidity to the mold material to shorten the molding time.
To impart fluidity, it is best to create an alcoholic solution of a water-soluble binder that is stable in the form of a hydrate at room temperature, and add to this an amount of water necessary to fix it as crystal water or a smaller amount. .
以下本発明の実施例について述べる。 Examples of the present invention will be described below.
〔実施例 １〕
ジルコンサンド；100重量部、K2PO4；20重量
部、水；８重量部を混練して鋳型材を調製し、こ
れを別途準備した木型を用いてつき固め、その後
200℃で乾燥して中子を造り、第２図のように組
立てた。すなわち、中子４を他の石膏鋳型（２分
割型）５、および蓋６と共に組立て、空洞部７に
スリツプ（Al2O3；100重量部、水；16重量部を
混練して調製した泥しよう）８を鋳込んで１時間
放置した。スリツプ固化後、鋳型５、蓋６をとり
はずした。中子４はスリツプ中の水分を吸収して
いるため、粘結力は低下して容易に除去すること
ができた。またグリーンボデイにも割れの発生は
認められなかつた。[Example 1] A molding material was prepared by kneading 100 parts by weight of zircon sand, 20 parts by weight of K 2 PO 4 and 8 parts by weight of water, which was compacted using a separately prepared wooden mold.
The core was made by drying at 200℃ and assembled as shown in Figure 2. That is, the core 4 is assembled together with another plaster mold (two-piece mold) 5 and the lid 6, and the cavity 7 is filled with slip (slud prepared by kneading 100 parts by weight of Al 2 O 3 and 16 parts by weight of water). 8) was cast and left for 1 hour. After the slip solidified, the mold 5 and the lid 6 were removed. Since the core 4 had absorbed the moisture in the slip, its cohesive strength was reduced and it could be easily removed. Furthermore, no cracking was observed in the green body.
〔実施例 ２〕
Al2O3（250〜325メツシユ）；100重量部、
K2CO3；10重量部、水；12重量部を混練して鋳
型材を調製し、別途準備した木型を用いて造型
し、その後200℃で乾燥して中子を造り、実施例
１と同様に組立てた。これにAl2O3スリツプを鋳
込んで１時間放置した。中子４は容易に除去で
き、また割れの発生も認められなかつた。[Example 2] Al 2 O 3 (250-325 mesh); 100 parts by weight,
A mold material was prepared by kneading 10 parts by weight of K 2 CO 3 and 12 parts by weight of water, which was molded using a separately prepared wooden mold, and then dried at 200°C to make a core. Assembled in the same way. An Al 2 O 3 slip was cast into this and left for 1 hour. Core 4 could be easily removed, and no cracks were observed.
〔実施例 ３〕
MgO（0.1〜0.3mm）；30重量部、Al2O3（250〜320
メツシユ）；70重量部、Na2CO3；32重量部、
水；10重量部を混練して鋳型材を調製し、別途準
備した木型を用いて造型し、その後200℃で乾燥
して中子を造り、実施例１と同様に組立てた。こ
れにAl2O3スリツプを鋳込んで１時間放置した。
中子４は容易に除去でき、割れの発生も認められ
なかつた。[Example 3] MgO (0.1 to 0.3 mm); 30 parts by weight, Al 2 O 3 (250 to 320
70 parts by weight, Na 2 CO 3 ; 32 parts by weight,
A mold material was prepared by kneading 10 parts by weight of water, molded using a separately prepared wooden mold, and then dried at 200°C to form a core, which was assembled in the same manner as in Example 1. An Al 2 O 3 slip was cast into this and left for 1 hour.
Core 4 was easily removed and no cracking was observed.
〔実施例 ４〕
第３図ａ，ｂにおいてｂで示す成形品９と同一
形状の模型を造り、この模型と別途準備した枠と
によつて鋳型１０および１１の２分割型を造型
し、これをａのように組立てた。鋳型１０は
Al2O3；90重量部、Na2CO3；８重量部、エチル
アルコール；28重量部、水；５重量部を混練して
調製したスラリから造型した鋳型、鋳型１１は石
膏鋳型である。空洞部１２にAl2O3スリツプを鋳
込み１時間放置した。スリツプ固化後に、鋳型１
１をはずして鋳型１０を除去した。鋳型１０はス
リツプの水分を吸収しているために除去は容易で
あつた。またグリーンボデイの表面にも何ら割れ
は認められなかつた。[Example 4] A model having the same shape as the molded product 9 shown by b in FIGS. Assembled as shown in a. The mold 10 is
Mold 11, which is a mold made from a slurry prepared by kneading 90 parts by weight of Al 2 O 3 , 8 parts by weight of Na 2 CO 3 , 28 parts by weight of ethyl alcohol, and 5 parts by weight of water, is a plaster mold. An Al 2 O 3 slip was cast into the cavity 12 and left for one hour. After solidifying the slip, mold 1
1 was removed and the mold 10 was removed. Since the mold 10 had absorbed moisture from the slip, it was easy to remove. Further, no cracks were observed on the surface of the green body.
以上説明したように、本発明による水溶性粘結
剤で造型した鋳型を用いると、鋳型は崩壊に必要
な水分をスリツプから吸収するとともに軟化して
崩壊容易となり、他方水分放出によつて生成した
グリーンボデイの収縮・変形は軟化した鋳型の吸
収するようになるのでグリーンボデイの生成過程
での割れの発生を防止できる他、複雑形状もしく
は中子を必要とする形状品の成形が可能となる。
As explained above, when a mold made with a water-soluble binder according to the present invention is used, the mold absorbs the moisture necessary for collapse from the slip and becomes soft and collapses easily, while the moisture generated by the release of moisture increases. Since the shrinkage and deformation of the green body is absorbed by the softened mold, it is possible to prevent cracks from occurring during the production process of the green body, and it is also possible to mold products with complex shapes or shapes that require a core.
第１図ａ，ｂ，ｃは本発明の成形に用いる鋳型
の水吸収性を示す説明図、第２図は本発明成形法
の実施例の説明図、第３図は本発明成形法の他の
実施例の説明図である。
１…鋳型骨材粒子、２…水溶性粘結剤、３…空
孔、４…中子、５，６，１１…石膏鋳型、８…ス
リツプ。
Figures 1 a, b, and c are explanatory diagrams showing the water absorption properties of the molds used for molding of the present invention, Figure 2 is an explanatory diagram of an example of the molding method of the present invention, and Figure 3 is an explanatory diagram of an example of the molding method of the present invention. It is an explanatory view of an example of. 1... Mold aggregate particles, 2... Water-soluble binder, 3... Holes, 4... Core, 5, 6, 11... Gypsum mold, 8... Slip.
Claims (1)
後に鋳型を除去する成形法において、前記鋳型の
骨材にスリツプの溶剤に対して不溶性の粒子を用
いた水溶性の粘結剤で造型することを特徴とする
スリツプキヤステイング成形法。 ２ 鋳型骨材がアルミナ、マグネシヤ、ジルコン
サンド、珪砂の粒子であることを特徴とする特許
請求の範囲第１項記載のスリツプキヤステイング
成形法。 ３ 粘結剤が炭酸塩であることを特徴とする特許
請求の範囲第１項記載のスリツプキヤステイング
成形法。 ４ 炭酸塩が炭酸ナトリウム、炭酸カリウムであ
ることを特徴とする特許請求の範囲第３項記載の
スリツプキヤステイング成形法。 ５ 粘結剤が塩化物であることを特徴とする特許
請求の範囲第１項記載のスリツプキヤステイング
成形法。 ６ 塩化物が塩化ナトリウム、塩化カリウム、塩
化マグネシウム、塩化リチウムであることを特徴
とする特許請求の範囲第５項記載のスリツプキヤ
ステイング成形法。 ７ 粘結剤が燐酸塩であることを特徴とする特許
請求の範囲第１項記載のスリツプキヤステイング
成形法。 ８ 燐酸塩が燐酸３ナトリウム、燐酸３カリウ
ム、燐酸水素２カリウムであることを特徴とする
特許請求の範囲第７項記載のスリツプキヤステイ
ング成形法。 ９ 粘結剤にアルコールを添加することを特徴と
する特許請求の範囲第３項、第５項、第７項のい
ずれかに記載のスリツプキヤステイング成形法。 １０ 鋳型に空洞を設けることを特徴とする特許
請求の範囲第１項記載のスリツプキヤステイング
成形法。 １１ 骨材；50〜95重量％、粘結剤＋水；５〜50
重量％とすることを特徴とする特許請求の範囲第
１項記載のスリツプキヤステイング成形法。 １２ 鋳型内にスリツプを鋳込み、スリツプの固
化後に鋳型を除去するものにおいて、前記鋳型が
常温で水溶性の粘結剤で造型したものであること
を特徴とするスリツプキヤステイング成形用鋳
型。[Scope of Claims] 1. A molding method in which a slip is cast into a mold and the mold is removed after the slip has solidified, in which a water-soluble binder using particles insoluble in the slip solvent is added to the aggregate of the mold. The slip casting molding method is characterized by molding. 2. The slip casting molding method according to claim 1, wherein the mold aggregate is particles of alumina, magnesia, zircon sand, or silica sand. 3. The slip casting molding method according to claim 1, wherein the binder is a carbonate. 4. The slip casting molding method according to claim 3, wherein the carbonate is sodium carbonate or potassium carbonate. 5. The slip casting molding method according to claim 1, wherein the binder is a chloride. 6. The slip casting molding method according to claim 5, wherein the chloride is sodium chloride, potassium chloride, magnesium chloride, or lithium chloride. 7. The slip casting molding method according to claim 1, wherein the binder is a phosphate. 8. The slip casting molding method according to claim 7, wherein the phosphate is trisodium phosphate, tripotassium phosphate, or dipotassium hydrogen phosphate. 9. The slip casting molding method according to any one of claims 3, 5, and 7, characterized in that alcohol is added to the binder. 10. The slip casting molding method according to claim 1, wherein a cavity is provided in the mold. 11 Aggregate; 50-95% by weight, binder + water; 5-50
The slip casting molding method according to claim 1, characterized in that the amount is expressed as % by weight. 12. A slip casting mold in which a slip is cast into the mold and the mold is removed after the slip has solidified, characterized in that the mold is molded with a water-soluble binder at room temperature.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59063319A JPS60208205A (en) | 1984-04-02 | 1984-04-02 | Slip casting molding method and mold for molding |
| KR1019850001985A KR890004247B1 (en) | 1984-04-02 | 1985-03-26 | Slip casting forming method and mold |
| DE19853511694 DE3511694A1 (en) | 1984-04-02 | 1985-03-29 | SLICKER ENERGY METHOD AND SLICKER ENERGY FORM |
| US06/719,073 US4659526A (en) | 1984-04-02 | 1985-04-02 | Slip casting forming method and mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59063319A JPS60208205A (en) | 1984-04-02 | 1984-04-02 | Slip casting molding method and mold for molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60208205A JPS60208205A (en) | 1985-10-19 |
| JPH0150561B2 true JPH0150561B2 (en) | 1989-10-30 |
Family
ID=13225824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59063319A Granted JPS60208205A (en) | 1984-04-02 | 1984-04-02 | Slip casting molding method and mold for molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60208205A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521019A (en) * | 1991-07-09 | 1993-01-29 | Mitsubishi Electric Corp | Deflection yoke core and its manufacture |
-
1984
- 1984-04-02 JP JP59063319A patent/JPS60208205A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60208205A (en) | 1985-10-19 |
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