JPS61149402A - Molding method of sintered member - Google Patents
Molding method of sintered memberInfo
- Publication number
- JPS61149402A JPS61149402A JP27936684A JP27936684A JPS61149402A JP S61149402 A JPS61149402 A JP S61149402A JP 27936684 A JP27936684 A JP 27936684A JP 27936684 A JP27936684 A JP 27936684A JP S61149402 A JPS61149402 A JP S61149402A
- Authority
- JP
- Japan
- Prior art keywords
- core
- powder
- green compact
- liquid
- sintered
- 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
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
(1)産業上の利用分野
本発明は、超硬合金2時には他の焼結金属あるいはセラ
ミックス、サーメットの製造法の改良に藺すス才、ので
ある。DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Application Field The present invention is useful for improving the manufacturing method of cemented carbide, other sintered metals, ceramics, and cermets.
(2)従来の技術
超硬合金を含む焼結材料の製造法は、コールドプレス法
とホットプレス法に大別され、本発明はコールドプレス
法の改良にか\るものであるからコールドプレス法につ
いて説明する。(2) Conventional technology Methods for manufacturing sintered materials containing cemented carbide are broadly classified into cold press method and hot press method.Since the present invention is based on an improvement of the cold press method, the cold press method is used. I will explain about it.
必要とする各種微粉材料を混合した完成粉末を、金型ま
たはゴム型に充填し、これに高圧を加えて圧粉体をつく
り、この圧粉体をそのま一焼結するか、あるいは仮焼結
したのち成形加工を施して、焼結することが知られてい
る。Fill a mold or rubber mold with the finished powder mixed with various necessary fine powder materials, apply high pressure to it to make a powder compact, and then sinter the compact as it is, or perform calcination. It is known that the material is sintered, then molded and then sintered.
本発明は上記焼結製品の製造法のなかで圧粉体製造過程
の改良にか−るものであるので更に説明を加える。Since the present invention relates to an improvement in the green compact production process among the above-mentioned methods for producing sintered products, a further explanation will be given.
金型を使用する圧粉体の製造法
所定寸法の雌型の中に所定量の完成粉末を入れ雄型を押
入して、油圧プレスまたは機械プレスを用いてIced
当たり1000に、程度の加圧を行った後、金型から圧
粉体を取出し、そのま−か又は適当な機械加工を加えて
焼結に廻す。この場合、小形または単純形状の製品を造
る場合は問題が少ないが、大形の製品、特にリング状の
製品を造る場合に大きな問題が生じる。即ち、リング状
製品を造らんとする場合、圧粉体の性質上、中実にする
かまたは所用寸法に対して極めて大きな余肉をつけるこ
とが必要である。この事は貴重な資源を無駄にするのみ
で無く次行程の成形作業に多大な工数をかけることにな
ると生産性を阻害している。また高価な金型とか大型の
プレスを必要として生産コストの上昇をまねいている。Method for manufacturing compacted powder using a mold A predetermined amount of finished powder is placed in a female mold of a predetermined size, a male mold is pushed in, and the compact is iced using a hydraulic press or mechanical press.
After applying a pressure of about 1,000 psi, the green compact is removed from the mold and sintered either directly or after being subjected to appropriate machining. In this case, there are few problems when manufacturing small-sized or simple-shaped products, but a big problem occurs when manufacturing large-sized products, especially ring-shaped products. That is, when a ring-shaped product is to be produced, due to the nature of the green compact, it is necessary to make it solid or to add extremely large extra thickness to the required dimensions. This not only wastes valuable resources, but also obstructs productivity as it requires a large amount of man-hours for the next molding process. Additionally, expensive molds and large presses are required, leading to an increase in production costs.
ゴム型を使用する圧粉体の製造法
所定のゴム型の中に完成粉末を充填して、これを液体を
入れた耐圧容器の中に入れて1c11当たり1000に
、程度の液圧をかけて圧粉し減圧後、ゴム型から圧粉体
を取出す方法であるが、この方法による場合圧粉体の密
度が均一である点は有利であるが、圧粉体の寸法保持が
困難で、の大きな余肉を残すことになって金型を使用す
る方法と同様、多くの問題を残している。Method for producing compacted powder using a rubber mold: Fill a specified rubber mold with the finished powder, place it in a pressure-resistant container containing liquid, and apply a liquid pressure of about 1,000 ml per 1c11. After compacting and reducing the pressure, the green compact is removed from the rubber mold.This method has the advantage that the density of the green compact is uniform, but it is difficult to maintain the dimensions of the green compact, and The method of using molds leaves a large amount of excess meat, as well as leaving many problems.
以上のごとく公知の圧粉体製造法は多く問題があり、特
に大型のリング形状圧粉体製造においては、貴重な資源
の有効利用、生産性、設備費、フロアスベーの点におい
て改善することが急がれている。As mentioned above, there are many problems with the known green compact production methods, and improvements are urgently needed in terms of effective use of precious resources, productivity, equipment costs, and floor space, especially in the production of large ring-shaped powder compacts. It's broken.
(3)本発明が解決しようとする問題点近時需要が増大
している大形リング状製品の製造において、従来法によ
る圧粉体製造法の欠点を排除して貴重な資源の節減、生
産性の向上、投下資金の節約をはからんとするものであ
る。(3) Problems to be solved by the present invention In the production of large-sized ring-shaped products, for which demand has been increasing recently, the disadvantages of the conventional green compact production method can be eliminated to save valuable resources and increase productivity. The aim is to improve performance and save on invested funds.
(4)問題点を解決するための手段
本発明は、上述の問題点を解消すると\もに全く新しい
圧粉体の製造法を提供するものである。(4) Means for Solving the Problems The present invention solves the above-mentioned problems and provides a completely new method for producing a green compact.
その基本とするところは、遠心力を利用して、大型リン
グ状圧粉体を得んとするものである。The basic idea is to use centrifugal force to obtain a large ring-shaped powder compact.
液体および気体の排出孔を持つ籠型廻転体の中に圧粉体
所定外径寸法に対応する内径の多孔質中子を設置し、こ
れを廻転せしめて、その中にあらかじめ定めた量の完成
粉末を懸濁せしめたスラリーを小量宛注入して、廻転を
続け、完全に脱水した後、多孔質中子と共に取出し更に
圧粉体を中子から取り外して圧粉体を得るものである。A porous core with an inner diameter corresponding to the predetermined outer diameter of the powder compact is installed in a cage-shaped rotating body with liquid and gas discharge holes, and the porous core is rotated to complete a predetermined amount of powder. A small amount of slurry in which powder is suspended is injected, the rotation is continued, and after complete dehydration, it is taken out together with the porous core, and the green compact is further removed from the core to obtain a green compact.
詳説したごとく末法によれば、高価な金型とかプレス機
を必要としないのみならず、余肉を持たない即ち省資材
でリング状圧粉体が効率的に製作出来るのである。As explained in detail, according to the final method, not only is there no need for expensive molds or presses, but also ring-shaped green compacts can be efficiently produced without excess thickness, ie, with less material.
(5)実施例
外径180”、高さ 95”、肉厚10”−のリング状
圧粉体の製作についてその実施例を示す。(5) Example of Example An example of manufacturing a ring-shaped green compact having a diameter of 180'', a height of 95'', and a wall thickness of 10'' will be described.
第1.2.3図において、(1)は外周に液体および気
体の排出孔を持つ廻転ドラムで、これに内接して(2)
で示す外径210′″−9高さ95′″1.内径180
′″1.の多孔質セラミックスの中子が設置されている
。中子の内面に(3)で示す濾紙または濾布を一重また
は多重に液体にて張り付ける、このものに1分間約36
00廻転を与えて廻転せしめる0次にWC94%Co
6%比の完成粉末4000 gを2000ccのメタノ
ールに懸濁せしめた液をスプレーによって注入する。In Figure 1.2.3, (1) is a rotating drum with liquid and gas discharge holes on its outer periphery, and (2) is inscribed in this.
Outer diameter 210'''-9 Height 95'''1. Inner diameter 180
A porous ceramic core is installed in ``1.'' The filter paper or filter cloth shown in (3) is pasted with liquid in one or more layers on the inner surface of the core.
0 order WC94%Co that gives 0 rotation and makes it rotate
A suspension of 4000 g of 6% finished powder in 2000 cc of methanol is injected by spraying.
注入後約2分間脱水して多孔質中子と共に圧粉体を取出
し、数時間乾燥した後、濾紙と共に圧粉体を取出し、濾
紙を取外して圧粉体を得る。After injection, the powder is dehydrated for about 2 minutes, and the powder compact is taken out together with the porous core. After drying for several hours, the powder compact is taken out together with the filter paper, and the filter paper is removed to obtain the powder compact.
得られた圧粉体はそのま\か又は侃焼結の後、わずかの
加工を施して焼結することによって所定形状寸法の製品
を得ることが出来る。The obtained green compact can be used as it is, or after pre-sintering, a product with a predetermined shape and size can be obtained by performing slight processing and sintering.
図面は何れも本発明の詳細な説明するもので第1図は側
面図、第2図は正面図、第3図は断面図の夫々一部を示
す。The drawings are for explaining the present invention in detail, and FIG. 1 shows a side view, FIG. 2 shows a front view, and FIG. 3 shows a part of a sectional view.
Claims (3)
、焼結されるべき粉末を含有する液状体を供給して回転
ドラムを高速回転し、中子内に脱水固着した粉末を用い
ることを特徴とする焼結部材の成形法。(1) A liquid containing the powder to be sintered is supplied to the inside of a porous core provided inscribed in a rotating drum, the rotating drum is rotated at high speed, and the powder is dehydrated and fixed inside the core. A method for forming a sintered member, characterized by using.
特許請求の範囲第1項記載の焼結部材の成形法。(2) A method for molding a sintered member according to claim 1, wherein a filter paper or filter cloth is attached to the inner surface of the core.
を特徴とする特許請求の範囲第1項または第2項記載の
焼結部材の成形法。(3) A method for forming a sintered member according to claim 1 or 2, wherein the powder to be sintered is a cemented carbide powder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27936684A JPS61149402A (en) | 1984-12-24 | 1984-12-24 | Molding method of sintered member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27936684A JPS61149402A (en) | 1984-12-24 | 1984-12-24 | Molding method of sintered member |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61149402A true JPS61149402A (en) | 1986-07-08 |
Family
ID=17610154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27936684A Pending JPS61149402A (en) | 1984-12-24 | 1984-12-24 | Molding method of sintered member |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61149402A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02209404A (en) * | 1989-02-08 | 1990-08-20 | Hitachi Tool Eng Ltd | Manufacture of super hard alloy tool |
CN110435166A (en) * | 2019-08-28 | 2019-11-12 | 华南理工大学 | A kind of porous material dynamic rotary sinter molding method and its molding machine |
-
1984
- 1984-12-24 JP JP27936684A patent/JPS61149402A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02209404A (en) * | 1989-02-08 | 1990-08-20 | Hitachi Tool Eng Ltd | Manufacture of super hard alloy tool |
CN110435166A (en) * | 2019-08-28 | 2019-11-12 | 华南理工大学 | A kind of porous material dynamic rotary sinter molding method and its molding machine |
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