JPH0318978B2 - - Google Patents
Info
- Publication number
- JPH0318978B2 JPH0318978B2 JP59055539A JP5553984A JPH0318978B2 JP H0318978 B2 JPH0318978 B2 JP H0318978B2 JP 59055539 A JP59055539 A JP 59055539A JP 5553984 A JP5553984 A JP 5553984A JP H0318978 B2 JPH0318978 B2 JP H0318978B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- model
- release agent
- mold release
- casting
- 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 - Lifetime
Links
- 239000006082 mold release agent Substances 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 9
- 230000003746 surface roughness Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000011882 ultra-fine particle Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
- B22C19/06—Devices for rapping or loosening the pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、抜き勾配のない模型による鋳造方法
に関するもので、特にエンジンのクランクシヤフ
ト、カムシヤフト、シリンダ等の鋳造に好適な方
法に係るものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a casting method using a model without draft, and particularly to a method suitable for casting engine crankshafts, camshafts, cylinders, etc. be.
（従来の技術）
従来より、鋳型を造型するための模型には抜き
勾配を付けるのが常識となつている。これは、い
うまでもなく、造型後鋳型から模型を容易に離型
し、また、金型鋳造の場合は鋳造後鋳型から製品
を容易に取り出すためである。(Prior Art) Conventionally, it has been common knowledge to provide a draft angle to a model for producing a mold. Needless to say, this is for the purpose of easily releasing the model from the mold after molding and, in the case of die casting, for easily taking out the product from the mold after casting.
（発明が解決しようとする課題）
しかしながら、上記従来の如く、模型に抜き勾
配を付けた場合、製品の肉厚が不必要に増加する
ため、製品の軽量化、小型化を妨げるとともに、
本来平面でよい部分に勾配を付けるため、模型が
複雑な形状となり、その製作費が増大するという
問題があつた。(Problems to be Solved by the Invention) However, when a draft angle is provided to the model as in the above-mentioned conventional method, the wall thickness of the product increases unnecessarily, which impedes the reduction in weight and size of the product.
The problem was that the model had a complicated shape because it had to be sloped in a part that should normally be flat, which increased the manufacturing cost.
例えば、第１図は鋳造されるべきクランクシヤ
フト１を示している。クランクシヤフト１は、互
いに偏心して形成されたクランクピン２と前後ジ
ヤーナル３，４とが、２個の互いに平行なクラン
クアーム５により連結されたものである。 For example, FIG. 1 shows a crankshaft 1 to be cast. The crankshaft 1 includes a crank pin 2 and front and rear journals 3 and 4, which are eccentrically formed relative to each other, and connected by two mutually parallel crank arms 5.
各クランクアーム５は、第２図に示すように、
両側面に抜き勾配６が付されて鋳造されるので、
その分だけ肉厚が増加する。そのため、クランク
シヤフト１は重量と全長が増大し、エンジンの軽
量化、小型化が妨げられている。この傾向はシリ
ンダ数が増えるにつれて顕著となる。 Each crank arm 5, as shown in FIG.
Since it is cast with draft angle 6 on both sides,
The wall thickness increases accordingly. Therefore, the weight and overall length of the crankshaft 1 increase, which hinders the reduction in weight and size of the engine. This tendency becomes more pronounced as the number of cylinders increases.
また、第３図に鋳造されるべきギヤ付カムシヤ
フト７を示している。ギヤ付カムシヤフト７は、
軸８にギヤ９と２個のカム１０とが形成されたも
のである。 Further, FIG. 3 shows a geared camshaft 7 to be cast. The geared camshaft 7 is
A gear 9 and two cams 10 are formed on a shaft 8.
ギヤ９とカム１０とは、第４図に示すように、
それぞれの両側面に円錐状に抜き勾配１１，１２
が付されて鋳造されるので、ギヤ付カムシヤフト
７の場合も前記クランクシヤフト１と同様の問題
がある。 The gear 9 and the cam 10 are as shown in FIG.
Conical draft angles 11 and 12 on each side
The geared camshaft 7 also has the same problem as the crankshaft 1.
その他、シリンダ等（図示省略）の鋳造におい
ても事情は同じである。 In addition, the situation is the same in casting of cylinders and the like (not shown).
本発明の目的は、この様な問題を解決し、抜き
勾配のない模型を用いても容易に離型できるよう
にした抜き勾配のない鋳造方法を提供することに
ある。 An object of the present invention is to solve such problems and to provide a casting method without a draft angle that allows easy mold release even when a model without a draft angle is used.
（課題を解決するための手段）
この目的のため、本発明の解決手段は、模型を
抜き勾配なしに成形した後、該模型表面のうち離
型時に鋳型と摺動する前記抜き勾配のない面を、
その鋳型との離型時における該鋳型の離型方向に
沿つた研削方向で研削加工しかつ日本工業規格
（JIS−B0601）で規定される10S以下の表面あら
さに研削仕上げし、次いで該模型表面全面に超微
粒子からなりかつ鋳型に転写可能な離型剤を塗布
し、その後、該模型により鋳型を造型したのち該
鋳型から模型を離型することにより前記離型剤が
転写された鋳型を得、しかる後に該鋳型により鋳
造することを特徴とする。(Means for Solving the Problems) For this purpose, the solution of the present invention is to form a model without a draft, and then to mold the surface of the model without a draft, which slides with the mold when the mold is released. of,
Grinding is performed in the grinding direction along the mold release direction when the mold is released from the mold, and the surface roughness of the model is then ground to a surface roughness of 10S or less specified by Japanese Industrial Standards (JIS-B0601). A mold release agent made of ultrafine particles that can be transferred to the mold is applied to the entire surface, and then a mold is formed using the model, and then the model is released from the mold to obtain a mold to which the release agent has been transferred. , and then cast using the mold.
（作用）
これにより、本発明では、離型剤が塗布された
模型により鋳型が造型され、造型後、模型が鋳型
から離型される際、該模型表面のうち鋳型と摺動
する面が、該鋳型の離型方向に沿つた研削方向で
かつ表面あらさ10S以下に研削仕上げされている
ので、その表面の離型剤の潤滑作用と相俟つて、
鋳型をその離型方向に抜き易くなり、離型時の摩
擦抵抗は著しく低減される。従つて、模型は抜き
勾配がなくても極めて容易に離型される。また、
鋳型には離型剤が転写されているので、鋳造の際
改めて離型剤を塗布する必要がない。(Function) Accordingly, in the present invention, when a mold is molded using a model coated with a mold release agent and the model is released from the mold after molding, the surface of the model surface that slides with the mold is Since the surface is ground to a surface roughness of 10S or less in the grinding direction along the mold release direction, combined with the lubricating effect of the mold release agent on the surface,
It becomes easier to pull out the mold in the mold release direction, and the frictional resistance during mold release is significantly reduced. Therefore, the model can be demolded very easily even without a draft angle. Also,
Since the mold release agent is transferred to the mold, there is no need to reapply the mold release agent during casting.
さらに、このようにして造型された鋳型により
製品が鋳造されると、製品は離型剤の潤滑作用に
より極めて容易に鋳型から取り出すことができ、
またその鋳肌は平滑であり、寸法精度も高いもの
が得られる。 Furthermore, when a product is cast using a mold formed in this way, the product can be taken out of the mold extremely easily due to the lubricating action of the mold release agent.
Moreover, the casting surface is smooth and the dimensional accuracy is high.
（実施例）
以下、本発明の実施例を図面に基づいて説明す
る。なお、各図面中の同一符号は同一又は類似の
部分を示すものとする。(Example) Hereinafter, an example of the present invention will be described based on the drawings. Note that the same reference numerals in each drawing indicate the same or similar parts.
第１実施例は、第１図に示すクランクシヤフト
１の鋳造方法であり、第５図と第６図に示してい
る。 The first embodiment is a method for casting the crankshaft 1 shown in FIG. 1, and is shown in FIGS. 5 and 6.
第５図及び第６図に示すように、鋳型１３は、
前後ジヤーナル３，４の中心線Ａ−Ａとクランク
アーム５の中心線Ｂ−Ｂとを含む平面において上
型１４と下型１５とに分割されている。 As shown in FIGS. 5 and 6, the mold 13 is
It is divided into an upper mold 14 and a lower mold 15 in a plane including the center line AA of the front and rear journals 3 and 4 and the center line BB of the crank arm 5.
模型１６は金属、プラスチツク等の素材からな
り、クランクシヤフト１と同形にクランクピン部
１７、前後ジヤーナル部１８，１９及び２個のク
ランクアーム部２０が成形されたものである。し
かも、模型１６は、いかなる個所にも抜き勾配が
付されることなく成形されている。 The model 16 is made of a material such as metal or plastic, and has a crank pin portion 17, front and rear journal portions 18, 19, and two crank arm portions 20 molded in the same shape as the crankshaft 1. Moreover, the model 16 is molded without any draft angle being applied at any part.
模型１６の表面は、ヤスリ又はサンドペーパに
より、日本工業規格（JIS−B0601）に規定され
た表面あらさ10S以下に研削仕上げされる。特
に、クランクアーム部２０の両側面２０ａ、前後
ジヤーナル部１８，１９の端面１８ａ，１９ａの
ように模型１６表面のうち離型時に鋳型１３の上
型１４又は下型１５と摺動する面（すなわち抜き
勾配のない面）は、その上型１４又は下型１５と
の離型時における該上型１４又は下型１５の離型
方向に沿つた研削方向（第６図の矢印方向で示す
ように上型１４に対応する部分にあつては上方
向、下型１５に対応する部分にあつては下方向）
で研削加工されて上記表面あらさ10S以下に研削
仕上げされる。 The surface of the model 16 is ground to a surface roughness of 10S or less as defined by Japanese Industrial Standards (JIS-B0601) using a file or sandpaper. In particular, surfaces of the model 16 that slide against the upper mold 14 or lower mold 15 of the mold 13 during mold release, such as both side surfaces 20a of the crank arm portion 20 and end surfaces 18a and 19a of the front and rear journal portions 18 and 19 (i.e. The grinding direction (as shown by the arrow direction in FIG. For the part corresponding to the upper mold 14, the upward direction; for the part corresponding to the lower mold 15, the downward direction)
The surface is ground to a surface roughness of 10S or less.
仕上げられた模型１６の表面全面に離型剤２１
が塗布される。離型剤２１は、超微粒子であつ
て、かつ、鋳型１３に転写可能なものでなければ
らない。本発明者の研究によれば、二硫化モリブ
デンが最適であつた。 Mold release agent 21 is applied to the entire surface of the finished model 16.
is applied. The mold release agent 21 must be ultrafine particles and must be transferable to the mold 13. According to the research conducted by the present inventors, molybdenum disulfide was found to be optimal.
離型剤２１が塗布された模型１６により鋳型１
３が造型される。造型と同時に、模型１６の離型
剤２１が鋳型１３に転写されている。造型後、模
型１６の鋳型１３から離型されるのであるが、模
型１６の表面はあらさ10S以下に平滑に仕上げら
れているとともに、鋳型１３と摺動する面が該鋳
型１３の上型１４又は下型１５の離型方向に沿つ
た研削方向で研削仕上げされているので、その表
面に塗布された離型剤２１の潤滑作用と相俟つ
て、鋳型１３の上型１４及び下型１５はその離型
方向には抜け易くなり、離型時の摩擦抵抗は著し
く低減される。従つて、模型１６の抜き勾配がな
くても極めて容易に離型されるのである。鋳型１
３には離型剤２１が転写されているので、鋳造の
際改めて離型剤を塗布する必要がないことはいう
までもない。 The mold 1 is formed by the model 16 coated with the mold release agent 21.
3 is molded. At the same time as molding, the mold release agent 21 of the model 16 is transferred to the mold 13. After molding, the model 16 is released from the mold 13, and the surface of the model 16 is finished smooth with a roughness of 10S or less, and the surface that slides on the mold 13 is the upper mold 14 of the mold 13 or The upper mold 14 and the lower mold 15 of the mold 13 are finished by grinding in the grinding direction along the mold release direction of the lower mold 15, and together with the lubricating effect of the mold release agent 21 applied to the surface, the upper mold 14 and the lower mold 15 of the mold 13 are It becomes easier to pull out in the mold release direction, and the frictional resistance during mold release is significantly reduced. Therefore, even if there is no draft angle of the model 16, the mold can be released very easily. Mold 1
3 has the mold release agent 21 transferred thereto, so it goes without saying that there is no need to apply the mold release agent again during casting.
このようにして造型された鋳型１３によりクラ
ンクシヤフト１が鋳造される。鋳造されたクラン
クシヤフト１は、離型剤２１の潤滑作用により極
めて容易に鋳型１３から取り出される。また、そ
の鋳肌は平滑であり、寸法精度も高いものであ
る。 The crankshaft 1 is cast using the mold 13 formed in this manner. The cast crankshaft 1 is very easily removed from the mold 13 due to the lubricating action of the mold release agent 21. Furthermore, the casting surface is smooth and the dimensional accuracy is high.
第２実施例は、第３図に示すギヤ付カムシヤフ
ト７の鋳造方法であり、第７図と第８図に示して
いる。 The second embodiment is a method for casting the geared camshaft 7 shown in FIG. 3, and is shown in FIGS. 7 and 8.
第７図及び第８図に示すように、鋳型１３は、
軸８の中心線Ｃ−Ｃを含む平面において上型１４
と下型１５とに分割されている。 As shown in FIGS. 7 and 8, the mold 13 is
Upper mold 14 in a plane including center line C-C of shaft 8
and a lower mold 15.
模型２２は、上記模型１６と同一素材からな
り、ギヤ付カムシヤフト７と同形に軸部２３、ギ
ヤ部２４及び２個のカム部２５が成形されたもの
である。 The model 22 is made of the same material as the model 16, and has a shaft portion 23, a gear portion 24, and two cam portions 25 formed in the same shape as the geared camshaft 7.
模型２２も、上記模型１６と同様に、抜き勾配
なしに成形され、表面はあらさ10S以下に仕上げ
られ、ギヤ部２４及びカム部２５の両側面２４
ａ，２５ａ、軸部２３の両端面２３ａのように離
型時に鋳型１３の上型１４又は下型１５と摺動す
る面は、該上型１４又は下型１５の離型方向に沿
つた研削方向（第８図の矢印方向）で研削加工さ
れて10S以下に研削仕上げされ、表面に離型剤２
１が塗布される。 Like the model 16, the model 22 is also molded without a draft, the surface is finished to a roughness of 10S or less, and both sides 24 of the gear part 24 and the cam part 25 are
a, 25a, the surfaces that slide against the upper mold 14 or lower mold 15 of the mold 13 during mold release, such as both end surfaces 23a of the shaft portion 23, are ground along the mold release direction of the upper mold 14 or lower mold 15. It is ground in the direction (arrow direction in Figure 8) to a finish of 10S or less, and the surface is coated with mold release agent 2.
1 is applied.
以後の鋳型１３の造型、離型剤２１の転写、模
型２２の離型、ギヤ付カムシヤフト７の鋳造及び
鋳型１３からの取出しは、前記クランクシヤフト
１の場合と同様であるので、説明を省略する。 The subsequent steps of molding the mold 13, transferring the mold release agent 21, releasing the model 22, casting the geared camshaft 7, and removing it from the mold 13 are the same as in the case of the crankshaft 1, so the explanation will be omitted. .
本発明に係る鋳造方法の適用範囲は極めて広
く、各種エンジン用クランクシヤフト、カムシヤ
フト、シリンダ、バランサ等の製品に、また、普
通鋳鉄、ダクタイル鋳鉄、軽合金鋳物等の素材
に、更に、シエル鋳型、中高圧で造型された生砂
型、自硬性鋳型等の鋳型に適用することができ
る。 The application range of the casting method according to the present invention is extremely wide, including products such as crankshafts, camshafts, cylinders, balancers, etc. for various engines, materials such as ordinary cast iron, ductile cast iron, and light alloy castings, as well as shell molds, It can be applied to molds such as green sand molds and self-hardening molds made under medium and high pressure.
（発明の効果）
本発明は、上記の構成であるので、次のように
すぐれた効果を発揮する。(Effects of the Invention) Since the present invention has the above configuration, it exhibits the following excellent effects.
(1) 模型に抜き勾配がなくてもその離型時に鋳型
と摺動する面を該鋳型の離型方向に沿つた研削
方向で研削加工して表面あらさ10S以下に研削
仕上げしたことにより、その表面に塗布された
離型剤による潤滑作用と相俟つて、離型時の摩
擦抵抗を低減して容易に離型でき、模型の抜き
勾配を不要とした。(1) Even if the model does not have a draft angle, the surface that slides against the mold during mold release is ground in the grinding direction along the mold release direction to finish the surface to a surface roughness of 10S or less. Combined with the lubricating effect of the mold release agent applied to the surface, the frictional resistance during mold release is reduced, making mold release easy and eliminating the need for draft angles of the model.
(2) 模型に抜き勾配がないので、模型が簡単化さ
れる。従つて、模型の製作工数と納期が短縮さ
れ、模型費が低減される。(2) Since there is no draft angle in the model, the model is simplified. Therefore, the man-hours for manufacturing the model and the delivery time are shortened, and the cost of the model is reduced.
(3) 製品に抜き勾配が付かないので、製品の軽量
化、小型化が図れる上、機械加工代が均一かつ
少なくなり、加工工数を低減できる。(3) Since there is no draft angle on the product, it is possible to reduce the weight and size of the product, and the machining allowance is uniform and small, reducing the number of machining steps.
(4) 製品は、離型剤の作用により鋳肌が平滑で寸
法精度が良好となるので、商品価値が向上す
る。(4) The product has a smooth casting surface and good dimensional accuracy due to the action of the mold release agent, so the commercial value of the product is improved.
第１図は鋳造されるべきクランクシヤフトの斜
視図、第２図は従来技術で鋳造された第１図のク
ランクシヤフトの底面図、第３図は鋳造されるべ
きギヤ付カムシヤフトの斜視図、第４図は従来技
術で鋳造された第３図のギヤ付カムシヤフトの正
面図、第５図は本発明の第１実施例の鋳造方法を
示す正面図、第６図は第５図の側面図、第７図は
本発明の第２実施例の鋳造方法を示す正面図、第
８図は第７図の側面図である。
１……クランクシヤフト、５……クランクアー
ム、７……ギヤ付カムシヤフト、９……ギヤ、１
０……カム、１３……鋳型、１６……模型、２０
……クランクアーム部、２１……離型剤、２２…
…模型、２４……ギヤ部、２５……カム部。
Fig. 1 is a perspective view of a crankshaft to be cast, Fig. 2 is a bottom view of the crankshaft of Fig. 1 cast by the prior art, Fig. 3 is a perspective view of a geared camshaft to be cast; 4 is a front view of the geared camshaft of FIG. 3 cast by the conventional technique, FIG. 5 is a front view showing the casting method of the first embodiment of the present invention, and FIG. 6 is a side view of FIG. 5. FIG. 7 is a front view showing a casting method according to a second embodiment of the present invention, and FIG. 8 is a side view of FIG. 7. 1...Crankshaft, 5...Crank arm, 7...Camshaft with gear, 9...Gear, 1
0...Cam, 13...Mold, 16...Model, 20
...Crank arm part, 21...Mold release agent, 22...
...Model, 24...Gear part, 25...Cam part.
Claims (1)
面のうち離型時に鋳型と摺動する前記抜き勾配の
ない面を、その鋳型との離型時における該鋳型の
離型方向に沿つた研削方向で研削加工しかつ日本
工業規格（JIS−B0601）で規定される10S以下の
表面あらさに研削仕上げし、次いで該模型表面全
面に超微粒子からなりかつ鋳型に転写可能な離型
剤を塗布し、その後該模型により鋳型を造型した
のち該鋳型から模型を離型することにより前記離
型剤が転写された鋳型を得、しかる後に該鋳型に
より鋳造することを特徴とする抜き勾配のない模
型による鋳造方法。1 After molding a model without a draft angle, grinding the surface of the model surface without a draft angle that slides with the mold during release from the mold along the release direction of the mold during release from the mold. The model is ground to a surface roughness of 10S or less as specified by Japanese Industrial Standards (JIS-B0601), and then a mold release agent made of ultrafine particles and transferable to the mold is applied to the entire surface of the model. , after that, a mold is formed using the model, and then the model is released from the mold to obtain a mold to which the release agent has been transferred, and then casting is performed using the mold. Casting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5553984A JPS60199544A (en) | 1984-03-22 | 1984-03-22 | Casting method by pattern having no draft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5553984A JPS60199544A (en) | 1984-03-22 | 1984-03-22 | Casting method by pattern having no draft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60199544A JPS60199544A (en) | 1985-10-09 |
| JPH0318978B2 true JPH0318978B2 (en) | 1991-03-13 |
Family
ID=13001519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5553984A Granted JPS60199544A (en) | 1984-03-22 | 1984-03-22 | Casting method by pattern having no draft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60199544A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02211931A (en) * | 1989-02-10 | 1990-08-23 | Mitsubishi Motors Corp | Manufacture of cam shaft with lost foam pattern casting method |
| JP2002228010A (en) * | 2000-10-25 | 2002-08-14 | Teijin Seiki Co Ltd | Vacuum sealing mechanism and vacuum sealing apparatus |
| CN106476188B (en) * | 2016-12-20 | 2019-01-01 | 重庆德运模具制造有限公司 | A kind of quick draft mold |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5143813A (en) * | 1974-10-11 | 1976-04-14 | Nippon Steel Corp | UWAYAKENCHIKUHOHO |
| JPS589743A (en) * | 1981-07-09 | 1983-01-20 | Yamakawa Sangyo Kk | Molding method for mold |
| JPS5816754A (en) * | 1981-07-21 | 1983-01-31 | Kaou Kueekaa Kk | Production of mold having layer of refractory particles on casting surface part |
-
1984
- 1984-03-22 JP JP5553984A patent/JPS60199544A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5143813A (en) * | 1974-10-11 | 1976-04-14 | Nippon Steel Corp | UWAYAKENCHIKUHOHO |
| JPS589743A (en) * | 1981-07-09 | 1983-01-20 | Yamakawa Sangyo Kk | Molding method for mold |
| JPS5816754A (en) * | 1981-07-21 | 1983-01-31 | Kaou Kueekaa Kk | Production of mold having layer of refractory particles on casting surface part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60199544A (en) | 1985-10-09 |
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