JP2588008B2 - Manufacturing method of mold material for mold - Google Patents
Manufacturing method of mold material for moldInfo
- Publication number
- JP2588008B2 JP2588008B2 JP26582388A JP26582388A JP2588008B2 JP 2588008 B2 JP2588008 B2 JP 2588008B2 JP 26582388 A JP26582388 A JP 26582388A JP 26582388 A JP26582388 A JP 26582388A JP 2588008 B2 JP2588008 B2 JP 2588008B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- grinding
- pressure
- mold material
- manufacturing
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は全面にわたって通気用の細孔を有する金型用
型材を製造するための方法に関する。Description: FIELD OF THE INVENTION The present invention relates to a method for producing a mold die having pores for ventilation over the entire surface.
（従来技術と問題点） 従来プラスチックスの真空成形、圧空成形、ブロー成
形、射出成形、あるいは金属の重力金型鋳造、低圧金型
鋳造、ダイキャスト鋳造等に使用される金型は、通気の
ために、細孔、スリットあるいはベントプラグ等の加工
が施されるのが一般的である。しかしこれらの加工は局
部的であるため均一な空気抜けができないとともに加工
が製品に転写される等の問題がある。(Prior art and problems) Molds conventionally used for plastics vacuum molding, air pressure molding, blow molding, injection molding, or metal gravity die casting, low pressure die casting, die casting, etc. To this end, it is common to process holes, slits or vent plugs. However, since these processes are localized, there is a problem that uniform air bleeding cannot be performed and the process is transferred to a product.
このような問題を解決するものとして最近ではセラミ
ックス粉と金属粉とを混合した材料を粉末冶金の手法を
用いて成形焼結した型が開発されている。In order to solve such a problem, a mold in which a material obtained by mixing a ceramic powder and a metal powder is molded and sintered using a powder metallurgy technique has recently been developed.
このような型は微細な空孔が全面にわたって均一に分
布しているため空気抜けが良い上に空孔が微細であるた
め製品に転写されることもない等の利点を有する反面、
粉体が点接触により焼結されているため強さ及び靭性に
欠けるという問題がある。Although such a mold has advantages such as fine holes being uniformly distributed over the entire surface, air escape is good and the holes are fine, so that they are not transferred to a product.
There is a problem that strength and toughness are lacking because the powder is sintered by point contact.
（目 的） 本発明は、上記の問題に鑑みてなされたもので、全面
にわたって通気用の微細空孔を有し、かつ強度及び靭性
にすぐれた金型用型材を製造する方法を提供することを
目的とするものである。(Purpose) The present invention has been made in view of the above problems, and provides a method for producing a mold material having excellent strength and toughness, having fine pores for ventilation over the entire surface. It is intended for.
（問題を解決するための手段） 本発明はJIS G4805に選定されている軸受鋼を研削砥
石により研削して得られた研削粉を、脱脂、乾燥後、還
元及び焼鈍処理を施すとともに篩にかけて60〜240メッ
シュの研削短繊維を取り出し、該研削短繊維をプレス成
形用型もしくはCIP法用ラバー型内に均一密度に充填
し、0.5〜8ton/cm2の加圧力で加圧成形した後、還元性
雰囲気にて加熱焼結するとともに必要に応じて熱処理を
施して成る金型用型材の製造方法である。(Means for Solving the Problem) The present invention provides a grinding powder obtained by grinding a bearing steel selected by JIS G4805 with a grinding wheel, after reducing, drying, reducing and annealing, and sieving. 240 removed grinding short fibers of the mesh, was filled with the grinding short fibers uniformly density press mold or the CIP method for rubber mold, after pressing at pressure of 0.5~8ton / cm 2, the reduction This is a method for producing a mold material for a mold, which is heat-sintered in a neutral atmosphere and heat-treated as necessary.
（作 用） 本発明は、主材料としてJIS G4805に選定されている
軸受鋼を研削砥石により研削して得られる研削粉を使用
する。この研削粉をアセトン等の脱脂溶液にて脱脂洗浄
後、研削粉が酸化しないように乾燥する。乾燥後、研削
中の研削熱により酸化及び硬化したものを処理するため
に還元性雰囲気中で500〜650℃の温度で１〜２時間保持
し、還元及び焼鈍処理を施すとともに篩にて60〜240メ
ッシュの研削短繊維を取り出す。(Operation) In the present invention, a grinding powder obtained by grinding a bearing steel selected in JIS G4805 with a grinding wheel is used as a main material. This grinding powder is degreased and washed with a degreasing solution such as acetone, and then dried so that the grinding powder is not oxidized. After drying, in order to treat what has been oxidized and hardened by the grinding heat during grinding, it is kept in a reducing atmosphere at a temperature of 500 to 650 ° C. for 1 to 2 hours, and subjected to a reduction and annealing treatment and 60 to 60 Take out 240 mesh ground short fibers.
この短繊維は研削砥石により研削して得られるもので
あるため全体としてカール気味で、かつ帯状を呈してい
る。Since the short fibers are obtained by grinding with a grinding wheel, the short fibers are slightly curled as a whole and have a belt shape.
また、この短繊維は材質的には高炭素クロム鋼で鋼の
強さ硬さに寄与する炭素が過共析に固溶され、かつ、ク
ロム、モリブデン等が含有されているため強さと硬さが
格段に良好であると共に熱処理性に優れている。This short fiber is made of high-carbon chromium steel, and the carbon that contributes to the strength and hardness of the steel is dissolved in hypereutectoid and contains chromium and molybdenum. Are extremely good and have excellent heat treatment properties.
このようにして得た研削短繊維をプレス成形用型もし
くはCIP法用ラバー型内に均一に充填すると共に所要の
圧力により加圧成形して圧粉体を得る。The ground short fibers thus obtained are uniformly filled in a press molding die or a CIP method rubber die, and are pressed under a required pressure to obtain a green compact.
この圧粉体をアンモニア分解ガスあるいは水素ガス等
の還元性雰囲気にて加熱焼結したものである。これによ
り全面に微細な空孔を有し、かつ強度及び靭性に優れた
金型用型材が得られる。This green compact is heated and sintered in a reducing atmosphere such as an ammonia decomposition gas or a hydrogen gas. Thereby, a mold material having fine holes on the entire surface and excellent in strength and toughness can be obtained.
尚この型材は熱処理を施すことによりさらに強度ある
いは硬さを向上させることができる。This mold material can be further improved in strength or hardness by heat treatment.
（実験例） JIS G4805に選定されている軸受鋼を研削砥石により
研削して軸受を製作する工場から出る研削粉をアセトン
溶液を使用した超音波洗浄器中に30分間入れ洗浄脱脂
後、60℃に保持した真空乾燥器中に入れて乾燥し、この
乾燥研削粉を還元及び焼鈍を目的として水素ガス雰囲気
還元炉へ入れて600℃で１時間保持したあと冷却し、篩
にて60〜240メッシュの研削短繊維を取り出し、この研
削短繊維をラバー型に充填してCIP法により加圧成形し
て圧粉体をつくりこれを焼結して金型用型材を得てその
影響を調べた。(Experimental example) Grinding powder from a factory that manufactures bearings by grinding bearing steel selected by JIS G4805 with a grinding wheel is placed in an ultrasonic cleaner using an acetone solution for 30 minutes. And dried in a vacuum drier held at a temperature of 600 ° C. for 1 hour at 600 ° C. in a reduced atmosphere of hydrogen gas for reduction and annealing. The ground short fibers were taken out, filled into a rubber mold, press-molded by the CIP method to form a green compact, and sintered to obtain a mold material for a mold.
第１図に示す通り、成形圧が上昇するに従い強さが向
上する。これは密度が上昇するためであるが、それは逆
に通気のための残留空孔を少なくすることを意味する。
CIP法成形の場合成形圧4ton/cm2（プレス成形圧8ton/cm
2とほぼ同様な密度が得られる）この場合残留空孔率が1
5％弱となり金型の通気性に若干問題が生じる。As shown in FIG. 1, the strength increases as the molding pressure increases. This is due to the increased density, which in turn means less residual porosity for ventilation.
In case of CIP molding, molding pressure 4ton / cm 2 (press molding pressure 8ton / cm
( A density similar to 2 is obtained.) In this case, the residual porosity is 1
It is less than 5%, and there is a slight problem in the air permeability of the mold.
また、研削粉のうち60メッシュの篩網上に残る大きな
短繊維は、取り扱い途中においてフアイバーボールを形
成し、圧粉体の表面状態を悪化させるものであり、240
メッシュの篩網を通過した小さな短繊維は繊維が粉状と
なりからみ合いが少なく圧粉体の強度が弱いものであっ
た。In addition, large short fibers remaining on the 60-mesh screen of the grinding powder form fiber balls during handling, and deteriorate the surface state of the compact,
The small short fibers that passed through the mesh sieve mesh became powdery, had little entanglement, and had a low strength of the green compact.
さらにこの金型用型材に熱処理を施してプラスチック
インジュクション用金型を製作した。この金型により射
出成形された成形品の出来上がりは良好で射出成形圧も
従来の約2/3でよく、特にコーナ部のガス欠陥のない成
形品が得られた。Further, the mold material for the mold was subjected to a heat treatment to produce a mold for plastic injection. The finished product obtained by injection molding with this mold was good, and the injection molding pressure was about 2/3 that of the conventional product. In particular, a molded product free from gas defects at corners was obtained.
尚、上記実験例で得た圧粉体のうち1.5ton/cm2の加圧
力により加圧成形した圧粉体を水素ガス雰囲気中で1140
℃の加熱温度により２時間保持して加熱焼結し、金型用
型材を得ると共にこの金型用型材に熱処理を施した後の
金型用型材の特性値を表１に示すと共に組織の顕微鏡写
真を第２図に示す。顕微鏡写真において黒い部分が開空
孔である。Incidentally, the pressure of 1.5 ton / cm 2 of the obtained green compact in Experimental Example pressurized molded green compact in a hydrogen gas atmosphere 1140
The mixture was held at a heating temperature of 2 ° C. for 2 hours for heating and sintering to obtain a mold material, and the characteristic values of the mold material after the mold material was subjected to heat treatment are shown in Table 1 and a microscope of the structure. The photograph is shown in FIG. In the micrograph, the black portions are open pores.
（発明の効果） 本発明の製造方法により得られた型材による金型は全
面に微細で均一な開空孔を有するため通気用の孔加工を
一切必要とせず、また強度及び靭性に優れた特性を有す
る型にすることができる等種々の効果がある。 (Effect of the Invention) Since the mold made of the mold material obtained by the production method of the present invention has fine and uniform open holes on the entire surface, it does not require any hole processing for ventilation, and has excellent strength and toughness. There are various effects such as a mold having
第１図はCIP法成形圧と圧環強さの関係を示すグラフ、
第２図は実験例により得られた金型用型材の熱処理後の
金属組織を表わす顕微鏡写真である。FIG. 1 is a graph showing the relationship between the molding pressure and the radial crushing strength of the CIP method,
FIG. 2 is a micrograph showing the metal structure of the mold material obtained in the experimental example after heat treatment.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２２Ｆ 5/00 Ｂ２２Ｆ 9/04 Ｂ 9/04 9543−4Ｆ Ｂ２９Ｃ 33/38 Ｂ２９Ｃ 33/38 Ｂ２２Ｆ 5/00 Ｆ ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 6 Identification number Agency reference number FI Technical display location B22F 5/00 B22F 9/04 B 9/04 9543-4F B29C 33/38 B29C 33/38 B22F 5 / 00 F
Claims (1)
砥石により研削して得られた研削粉を、脱脂、乾燥後、
還元及び焼鈍処理を施すとともに篩にかけて60〜240メ
ッシュの研削単繊維を取り出し研削単繊維をプレス成形
用型もしくはCIP法用ラバー型内に均一密度に充填し、
0.5〜8ton/cm2の加圧力で加圧成形した後還元性雰囲気
にて加圧焼結するとともに熱処理に施して成る金型用型
材の製造方法1. Grinding powder obtained by grinding a bearing steel selected in JIS G4805 with a grinding wheel, after degreasing and drying,
Applying reduction and annealing treatment and sieving, take out the 60-240 mesh ground single fiber, fill the ground single fiber into a press molding die or CIP rubber mold to uniform density,
A method of manufacturing a mold material for a mold, which is formed by press-forming at a pressure of 0.5 to 8 ton / cm 2 , then pressure-sintering in a reducing atmosphere and heat-treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26582388A JP2588008B2 (en) | 1988-10-21 | 1988-10-21 | Manufacturing method of mold material for mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26582388A JP2588008B2 (en) | 1988-10-21 | 1988-10-21 | Manufacturing method of mold material for mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02115304A JPH02115304A (en) | 1990-04-27 |
| JP2588008B2 true JP2588008B2 (en) | 1997-03-05 |
Family
ID=17422553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26582388A Expired - Lifetime JP2588008B2 (en) | 1988-10-21 | 1988-10-21 | Manufacturing method of mold material for mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2588008B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015209702A1 (en) * | 2014-05-27 | 2015-12-03 | Ks Kolbenschmidt Gmbh | Laser sintered casting tools for gravity gravity die casting |
-
1988
- 1988-10-21 JP JP26582388A patent/JP2588008B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02115304A (en) | 1990-04-27 |
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