JP2013043212A - Powder molding device - Google Patents

Powder molding device Download PDF

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JP2013043212A
JP2013043212A JP2011183540A JP2011183540A JP2013043212A JP 2013043212 A JP2013043212 A JP 2013043212A JP 2011183540 A JP2011183540 A JP 2011183540A JP 2011183540 A JP2011183540 A JP 2011183540A JP 2013043212 A JP2013043212 A JP 2013043212A
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powder
supply unit
filling
powder molding
molded product
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JP5856782B2 (en
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Takeshi Kaneko
剛 金子
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Mitsubishi Materials Techno Corp
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Mitsubishi Materials Techno Corp
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Priority to JP2011183540A priority Critical patent/JP5856782B2/en
Priority to CN2011102709964A priority patent/CN102950790A/en
Priority to KR1020110092535A priority patent/KR20130022356A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
    • B30B11/06—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould each charge of the material being compressed against the previously formed body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
    • B30B15/306—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds for multi-layer articles

Abstract

PROBLEM TO BE SOLVED: To provide a powder molding device capable of consistently ensuring the quality of a product, and reducing the manufacturing cost even when a large number of molded products per unit step are manufactured by the two-layer molding.SOLUTION: The powder molding device includes: a first powder supply unit 11 which is reciprocally movable in a powder molding area 6 of a die 2 to supply first powder to the powder molding area 6; a temporarily pressing mechanism 8 capable of temporarily pressing the first powder supplied to the powder molding area 6 in a compressing manner; and a second powder supply unit 12 which is reciprocally movable in the powder molding area 6 to supply the second powder to the powder molding area 6. A plurality of filling parts 7 corresponding to shapes of molded articles 50 are formed in the powder molding area 6, and arranged so that the arraying direction of the filling parts 7 and the reciprocally moving direction M12 of the second powder supply part 12 may be orthogonal to each other.

Description

本発明は、例えば２層成形による粉末成形品を、単位工程あたりに多数個取りする場合に用いて有効な粉末成形装置に関するものである。   The present invention relates to a powder molding apparatus that is effective when, for example, a large number of powder molded products by two-layer molding are taken per unit process.

従来、例えばエンジン用バルブシートなどの製造における粉末成形加工では、互いに異なる性質の粉末を用い、これら粉末同士を積層させるように圧縮成形（２層成形）している。具体的に、成形するバルブシート（粉末成形品、以下、成形品と省略）において、燃焼室に臨むバルブ当接部位には耐熱性に優れる高価な粉末材料を用い、それ以外の部位には安価な粉末材料を用いることにより、製造費用を削減している。   Conventionally, in a powder molding process in the manufacture of, for example, a valve seat for an engine, powders having different properties are used, and compression molding (two-layer molding) is performed so that these powders are laminated. Specifically, in a valve seat to be molded (powder molded product, hereinafter abbreviated as a molded product), an expensive powder material with excellent heat resistance is used for the valve contact portion facing the combustion chamber, and the other portions are inexpensive. By using a simple powder material, the manufacturing cost is reduced.

この種の成形品を製造する粉末成形装置として、例えば下記特許文献１には、金型（ダイ）に形成された粉末成形領域に往復移動可能とされ、前記粉末成形領域に第１粉末（第一層目の粉末）を供給する第１粉末供給部（第１のフィーダー）と、前記粉末成形領域に供給された第１粉末を圧縮するように仮押し可能な仮押し機構（仮押し装置）と、前記粉末成形領域に往復移動可能とされ、前記粉末成形領域に第２粉末（第二層目の粉末）を供給する第２粉末供給部（第２のフィーダー）と、を備えたものが開示されている。尚、前記第２粉末が、前述した耐熱性に優れる高価な粉末材料となっている。   As a powder molding apparatus for manufacturing this type of molded article, for example, in Patent Document 1 below, it is possible to reciprocate in a powder molding region formed in a die (die), and the first powder (first A first powder supply unit (first feeder) for supplying the first powder), and a temporary pressing mechanism (temporary pressing device) capable of temporarily pressing the first powder supplied to the powder molding region And a second powder supply unit (second feeder) that is capable of reciprocating to the powder molding region and that supplies the second powder (second layer powder) to the powder molding region. It is disclosed. The second powder is an expensive powder material having excellent heat resistance as described above.

この粉末成形装置では、金型の粉末成形領域に、まず第１粉末供給部が第１粉末を供給し、該粉末成形領域に供給された第１粉末を、仮押し機構が仮押しして粉末密度を高め、該第１粉末上に、第２粉末供給部が第２粉末を供給した状態で、これら粉末全体を圧縮成形する。このように仮押しすることによって、第１、第２粉末同士の境界部分が曖昧でなくなるとともに、燃焼室に臨む第２粉末中に第１粉末が混在するようなことが抑制されて、製品の品質が確保される。   In this powder molding apparatus, the first powder supply unit first supplies the first powder to the powder molding region of the mold, and the first powder supplied to the powder molding region is temporarily pressed by the temporary pressing mechanism. The whole powder is compression-molded in a state where the density is increased and the second powder supply unit supplies the second powder onto the first powder. By temporarily pressing in this way, the boundary portion between the first and second powders is not ambiguous, and mixing of the first powder in the second powder facing the combustion chamber is suppressed, and the product Quality is ensured.

実用新案登録第３１０５９８９号公報Utility Model Registration No. 3105989

しかしながら、前述した従来の粉末成形装置では、下記の課題があった。
この種の粉末成形装置では、さらなる生産性の向上を目的として、単位工程あたりに成形品を多数個取りすることへの要望がある。このような多数個取りの手法として、金型の粉末成形領域に、成形品の形状に対応する充填部を複数形成することが考えられる。しかしながらこの場合、これら充填部に充填される粉末の供給量が互いに異なることに起因して、製品の品質にバラつきが生じるおそれがあった。特に、製品の性能に大きく影響する第２粉末の供給量にバラつきが生じると、製品の品質を安定して確保できなくなる可能性があることから、該第２粉末の供給量のマージンを大きくとらざるを得ず、製造費用が嵩んでしまう。 However, the above-described conventional powder molding apparatus has the following problems.
In this type of powder molding apparatus, there is a demand for taking a large number of molded products per unit process for the purpose of further improving productivity. As such a multi-cavity method, it is conceivable to form a plurality of filling portions corresponding to the shape of the molded product in the powder molding region of the mold. However, in this case, there is a possibility that the quality of the product may vary due to the supply amount of the powder filled in these filling portions being different from each other. In particular, if the supply amount of the second powder, which greatly affects the performance of the product, varies, the product quality may not be secured stably. Therefore, the margin of the supply amount of the second powder is greatly increased. Inevitably, manufacturing costs increase.

本発明は、このような事情に鑑みてなされたものであって、２層成形による成形品を単位工程あたりに多数個取りする場合においても、製品の品質を安定して確保でき、かつ、製造費用を削減できる粉末成形装置を提供することを目的としている。   The present invention has been made in view of such circumstances, and even when a large number of molded products by two-layer molding are taken per unit process, the quality of the product can be stably secured and manufactured. An object of the present invention is to provide a powder molding apparatus capable of reducing costs.

このような課題を解決して、前記目的を達成するために、本発明は以下の手段を提案している。
すなわち、本発明の粉末成形装置は、金型の粉末成形領域に往復移動可能とされ、前記粉末成形領域に第１粉末を供給する第１粉末供給部と、前記粉末成形領域に供給された第１粉末を圧縮するように仮押し可能な仮押し機構と、前記粉末成形領域に往復移動可能とされ、前記粉末成形領域に第２粉末を供給する第２粉末供給部と、を備え、前記粉末成形領域には、成形品の形状に対応する充填部が複数形成され、これら充填部の配列方向と、前記第２粉末供給部の往復移動方向とが、互いに垂直となるように配置されていることを特徴とする。 In order to solve such problems and achieve the above object, the present invention proposes the following means.
That is, the powder molding apparatus of the present invention is capable of reciprocating to the powder molding region of the mold, and includes a first powder supply unit that supplies the first powder to the powder molding region, and a first powder supplied to the powder molding region. A temporary pressing mechanism capable of temporarily pressing so as to compress one powder; and a second powder supply unit which is reciprocally movable to the powder molding region and supplies the second powder to the powder molding region. A plurality of filling parts corresponding to the shape of the molded product are formed in the molding region, and the arrangement direction of these filling parts and the reciprocating direction of the second powder supply part are arranged to be perpendicular to each other. It is characterized by that.

この粉末成形装置では、金型の粉末成形領域に、まず第１粉末供給部が第１粉末を供給し、該粉末成形領域に供給された第１粉末を、仮押し機構が仮押しして粉末密度を高め、該第１粉末上に、第２粉末供給部が第２粉末を供給した状態で、粉末全体を圧縮成形するようにしている。また、金型の粉末成形領域には、成形品の形状に対応する充填部が複数形成されており、単位工程あたりに成形品を複数成形（多数個取り）できるようになっている。   In this powder molding apparatus, the first powder supply unit first supplies the first powder to the powder molding region of the mold, and the first powder supplied to the powder molding region is temporarily pressed by the temporary pressing mechanism. The whole powder is compression-molded in a state where the density is increased and the second powder supply unit supplies the second powder onto the first powder. Further, a plurality of filling portions corresponding to the shape of the molded product are formed in the powder molding region of the mold, and a plurality of molded products can be molded (many pieces) per unit process.

本発明の粉末成形装置によれば、複数の充填部の配列方向と、第２粉末供給部の往復移動方向とが、互いに垂直となるように配置されているので、各充填部の第１粉末上に供給される第２粉末の供給量（充填量）のバラつきが抑制される。すなわち、例えば本発明とは異なり、充填部の配列方向と第２粉末供給部の往復移動方向とが互いに垂直とはならない配置である場合、これら充填部のうち、第２粉末供給部の移動の前進端側に位置する一の充填部より、第２粉末供給部の移動の後退端側に位置する他の充填部上に該第２粉末供給部が配置された状態が長く続くため、前記他の充填部に対する第２粉末の供給量が、前記一の充填部に対する前記供給量より多くなる。この場合、焼結後の製品の品質が確保できなくなるおそれがあるため、前記一の充填部への第２粉末の供給量を確保するために、第２粉末の供給量を全体的に増大させる（マージンを大きくとる）必要が生じて、製造費用が嵩んでしまうことになる。   According to the powder molding apparatus of the present invention, since the arrangement direction of the plurality of filling parts and the reciprocating direction of the second powder supply part are arranged to be perpendicular to each other, the first powder of each filling part Variations in the supply amount (filling amount) of the second powder supplied to the top are suppressed. That is, for example, unlike the present invention, when the arrangement direction of the filling parts and the reciprocation direction of the second powder supply part are not perpendicular to each other, the movement of the second powder supply part among these filling parts Since the state where the second powder supply unit is arranged on the other filling unit located on the back end side of the movement of the second powder supply unit continues from one filling unit located on the advance end side, the other The supply amount of the second powder to the filling portion is larger than the supply amount to the one filling portion. In this case, since the quality of the product after sintering may not be ensured, the supply amount of the second powder is generally increased in order to secure the supply amount of the second powder to the one filling part. This necessitates a large margin and increases the manufacturing cost.

一方、本発明によれば、第２粉末供給部が往復移動する際に、複数の充填部上に該第２粉末供給部が配置される時間が互いに同等となるので、これら充填部に対する第２粉末の供給量が均一となり、第２粉末の性能が重視される製品の品質が安定して確保されるのである。またこのように、複数の充填部に対する第２粉末の供給量のバラつきが抑制されるから、第２粉末の供給量を全体に増大させるような必要が生じないばかりか、該第２粉末の供給量を削減可能であり、よって製造費用を削減できる。   On the other hand, according to the present invention, when the second powder supply unit reciprocates, the time during which the second powder supply unit is arranged on the plurality of filling units is equal to each other. The supply amount of the powder becomes uniform, and the quality of the product in which the performance of the second powder is important is ensured stably. In addition, since the variation in the supply amount of the second powder to the plurality of filling parts is suppressed in this way, it is not necessary to increase the supply amount of the second powder as a whole. The amount can be reduced, and thus the manufacturing cost can be reduced.

また、本発明の粉末成形装置において、前記第１粉末供給部の往復移動方向と、前記第２粉末供給部の往復移動方向とは、互いに交差しており、前記第１粉末供給部は、前記充填部から排出された成形品を、前記粉末成形領域に向けた前進移動によって該粉末成形領域の外部へ向けて排出させる払い出し機構を備え、前記払い出し機構は、前記第１粉末供給部の往復移動方向に対して交差する方向に往復移動可能なスライド部と、前記スライド部の往復移動方向に沿うように該スライド部に複数形成され、それぞれが成形品を保持可能な保持部と、を備えることとしてもよい。   In the powder molding apparatus of the present invention, the reciprocating direction of the first powder supply unit and the reciprocating direction of the second powder supply unit intersect each other, and the first powder supply unit A discharge mechanism that discharges the molded product discharged from the filling unit toward the outside of the powder forming region by a forward movement toward the powder forming region; and the discharging mechanism is a reciprocating movement of the first powder supply unit. A plurality of slide parts that can reciprocate in a direction intersecting the direction, and a plurality of holding parts that are formed on the slide parts along the reciprocating direction of the slide parts, and each of which can hold a molded product. It is good.

この場合、第１粉末供給部の往復移動方向と、第２粉末供給部の往復移動方向とが、互いに交差しているので、第１粉末供給部の往復移動方向に対して、複数の充填部の配列方向は垂直とはならない。従って、第１粉末供給部が、粉末成形領域に向けて前進移動すると、複数の充填部のうち、まず該第１粉末供給部の往復移動方向の後退端側に位置する後方の充填部に対応する成形品が、払い出し機構の複数の保持部のうち、一の保持部に保持される。この状態から、払い出し機構のスライド部を該スライド部の往復移動方向に移動させることにより、前記一の保持部に保持された後方の成形品が移動するとともに、第１粉末供給部の往復移動方向の前進端側に位置する前方の充填部に対応する成形品が、複数の保持部のうち、前記一の保持部とは異なる他の保持部に対向配置される。この状態から、さらに第１粉末供給部が粉末成形領域に向けて前進移動することにより、前方の成形品が前記他の保持部に保持される。このように、複数の保持部にそれぞれ保持された成形品同士は、互いに当接することなく、粉末成形領域の外部へと払い出される（排出される）ようになっている。   In this case, since the reciprocating direction of the first powder supply unit and the reciprocating direction of the second powder supply unit intersect each other, a plurality of filling units with respect to the reciprocating direction of the first powder supply unit The arrangement direction of is not vertical. Therefore, when the first powder supply unit moves forward toward the powder forming region, the first powder supply unit first corresponds to the rear filling unit located on the backward end side in the reciprocating direction of the first powder supply unit. The molded product to be held is held by one holding portion among the plurality of holding portions of the payout mechanism. From this state, by moving the slide part of the dispensing mechanism in the reciprocating direction of the slide part, the rear molded product held by the one holding part moves, and the reciprocating direction of the first powder supply part A molded product corresponding to the front filling portion positioned on the forward end side of the plurality of the holding portions is arranged to face another holding portion different from the one holding portion among the plurality of holding portions. From this state, the first powder supply unit further moves forward toward the powder molding region, whereby the front molded product is held by the other holding unit. As described above, the molded products respectively held by the plurality of holding portions are discharged (discharged) to the outside of the powder molding region without coming into contact with each other.

本発明によれば、第１粉末供給部の粉末成形領域に向けた前進移動によって、多数個取りされた複数の成形品を払い出す際に、これら成形品同士が互いにぶつかり合うようなことが防止される。よって、成形品の排出動作にともなう該成形品の割れ、欠け、変形等を防止でき、製品の品質が安定して確保されるのである。   According to the present invention, when a plurality of molded products taken out by the forward movement toward the powder molding region of the first powder supply unit are dispensed, the molded products are prevented from colliding with each other. Is done. Therefore, it is possible to prevent the molded product from being cracked, chipped, deformed, etc. due to the discharging operation of the molded product, and to ensure the quality of the product stably.

本発明の粉末成形装置によれば、２層成形による成形品を単位工程あたりに多数個取りする場合においても、製品の品質を安定して確保でき、かつ、製造費用を削減できる。   According to the powder molding apparatus of the present invention, even when a large number of molded products by two-layer molding are taken per unit process, the product quality can be secured stably and the manufacturing cost can be reduced.

本発明の一実施形態に係る粉末成形装置を用いて２層成形される成形品の一例を示す側断面図である。It is a sectional side view which shows an example of the molded product shape | molded by two layers using the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置を用いて成形品を成形する手順を説明する図である。It is a figure explaining the procedure which shape | molds a molded article using the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置を用いて成形品を成形する手順を説明する図である。It is a figure explaining the procedure which shape | molds a molded article using the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置の要部を説明する上面図である。It is a top view explaining the principal part of the powder molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置の粉末成形領域及び第１粉末供給部を示す上面図である。It is a top view which shows the powder shaping | molding area | region and 1st powder supply part of the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置の粉末成形領域及び第１粉末供給部を示す側断面図である。It is a sectional side view which shows the powder shaping | molding area | region and 1st powder supply part of the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置の粉末成形領域及び第１粉末供給部を示す正面図である。It is a front view which shows the powder shaping | molding area | region and 1st powder supply part of the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置の第１粉末供給部を示す下面図である。It is a bottom view which shows the 1st powder supply part of the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置の成形工程を説明するグラフである。It is a graph explaining the shaping | molding process of the powder shaping | molding apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る粉末成形装置を説明する上での参考例を示すものである。The reference example in demonstrating the powder shaping | molding apparatus which concerns on one Embodiment of this invention is shown.

以下、本発明の一実施形態に係る粉末成形装置１について、図１〜図９を参照して説明する。
本実施形態の粉末成形装置１は、例えば、エンジン用のバルブシートの製造における粉末成形加工に用いられるものである。 Hereinafter, a powder molding apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS.
The powder shaping | molding apparatus 1 of this embodiment is used for the powder shaping | molding process in manufacture of the valve seat for engines, for example.

図１は、本実施形態の粉末成形装置１を用いて２層成形してなるバルブシートの焼結前の粉末成形品（成形品）５０を示している。この成形品５０は、円環状又は円筒状をなしており、その軸線Ｃ方向に沿う一方側（図１における上側）の部分が、耐熱性に優れる高価な粉末材料（第２粉末）５２で形成され、他方側（図１における下側）の部分が、安価な粉末材料（第１粉末）５１で形成されている。   FIG. 1 shows a powder molded product (molded product) 50 before sintering of a valve seat formed by two-layer molding using the powder molding apparatus 1 of the present embodiment. The molded product 50 has an annular shape or a cylindrical shape, and a portion on one side (the upper side in FIG. 1) along the axis C direction is formed of an expensive powder material (second powder) 52 having excellent heat resistance. The other side (the lower side in FIG. 1) is made of an inexpensive powder material (first powder) 51.

図１に示される側断面において、成形品５０の内周面のうち一方側の端部は、一方側に向かうに従い漸次軸線Ｃ方向に垂直な径方向の外側に向かって傾斜するテーパ面５３となっている。テーパ面５３は、成形品５０のうち、第２粉末５２で構成される領域に形成されている。また、成形品５０の外周面のうち他方側の端部は、該端部以外の部分より一段縮径して形成された圧入案内部５４となっている。   In the side cross section shown in FIG. 1, an end portion on one side of the inner peripheral surface of the molded product 50 has a tapered surface 53 that gradually inclines toward the outside in the radial direction perpendicular to the direction of the axis C as it goes to the one side. It has become. The tapered surface 53 is formed in a region formed of the second powder 52 in the molded product 50. Further, the end portion on the other side of the outer peripheral surface of the molded product 50 is a press-fitting guide portion 54 formed with a diameter reduced by one step from the portion other than the end portion.

このように構成された成形品５０は、焼結工程等を経て製品であるバルブシートとなり、エンジンの対象部位に配設される。バルブシートがエンジンに配設された状態で、テーパ面５３は、燃焼室に臨むバルブ当接部位とされる。また、圧入案内部５４は、バルブシートをマニホールドの開口部に圧入するための誘い込み部分となる。   The molded product 50 configured in this way becomes a valve seat which is a product through a sintering process and the like, and is disposed at a target portion of the engine. In a state where the valve seat is disposed in the engine, the tapered surface 53 is a valve contact portion facing the combustion chamber. The press-fitting guide portion 54 serves as a guide portion for press-fitting the valve seat into the manifold opening.

図２〜図４に示されるように、粉末成形装置１は、成形品を成形する金型として、筒状のダイ２と、ダイ２の径方向内側に配設される筒状の下パンチ３と、下パンチ３の径方向内側に配設される軸状のコアロッド４と、下パンチ３に軸方向から対向するように配設されるとともに、該下パンチ３に対して接近離間可能とされた軸状の上パンチ５と、を有している。これらダイ２、下パンチ３、コアロッド４及び上パンチ５は、共通軸Ｏに同軸に配設されており、共通軸Ｏ方向に沿って互いに相対移動可能とされている。尚、この共通軸Ｏは鉛直方向に延びている。
以下の説明においては、共通軸Ｏ方向に沿う上パンチ５側を上側、下パンチ３側を下側という（図３（ｅ）を参照）。また、共通軸Ｏに垂直な方向を径方向といい、共通軸Ｏを中心に周回する方向を周方向という。 As shown in FIG. 2 to FIG. 4, the powder molding apparatus 1 includes a cylindrical die 2 and a cylindrical lower punch 3 disposed on the radially inner side of the die 2 as a mold for molding a molded product. And an axial core rod 4 disposed on the inner side in the radial direction of the lower punch 3, and disposed so as to face the lower punch 3 from the axial direction, and capable of approaching and separating from the lower punch 3. And a shaft-like upper punch 5. The die 2, the lower punch 3, the core rod 4 and the upper punch 5 are disposed coaxially with the common axis O, and are movable relative to each other along the common axis O direction. The common axis O extends in the vertical direction.
In the following description, the upper punch 5 side along the common axis O direction is referred to as the upper side, and the lower punch 3 side is referred to as the lower side (see FIG. 3E). A direction perpendicular to the common axis O is referred to as a radial direction, and a direction around the common axis O is referred to as a circumferential direction.

ダイ２には、共通軸Ｏに沿って延びる貫通孔が形成されており、該貫通孔が共通軸Ｏと同軸となっている。ダイ２において貫通孔が配置される部位は、粉末成形領域６となっている。図４に示されるように、粉末成形領域６には、成形品５０の形状に対応する前記貫通孔が複数形成されており、これら貫通孔がそれぞれ充填部７とされている。また、ダイ２の各充填部７に対応して、下パンチ３、コアロッド４及び上パンチ５がそれぞれ配設されている。尚、前述のように、ダイ２に複数の充填部７が形成される代わりに、単一の充填部７を有するダイ２が、互いに隣接するように複数配設されていても構わない。   A through hole extending along the common axis O is formed in the die 2, and the through hole is coaxial with the common axis O. The part where the through hole is arranged in the die 2 is a powder molding region 6. As shown in FIG. 4, a plurality of the through holes corresponding to the shape of the molded product 50 are formed in the powder molding region 6, and each of these through holes is a filling portion 7. In addition, a lower punch 3, a core rod 4, and an upper punch 5 are disposed corresponding to each filling portion 7 of the die 2. As described above, instead of forming the plurality of filling portions 7 in the die 2, a plurality of dies 2 having a single filling portion 7 may be disposed adjacent to each other.

また、図２及び図３において、ダイ２の貫通孔の内周面のうち上端部は、該上端部以外の部分より一段拡径して形成されている。
下パンチ３の外周面は、ダイ２の貫通孔の内周面における上端部以外の部分に摺動可能に当接している。図２（ａ）に示されるように、ダイ２の上端面と下パンチ３の上端面とが面一とされた状態で、ダイ２の内周面における上端部と下パンチ３の外周面における上端部との間には、若干の隙間Ｇが形成されている。隙間Ｇは、成形品５０の外周面における圧入案内部５４以外の部分を、該圧入案内部５４より拡径して形成する目的で設けられている。
また、コアロッド４の外周面は、下パンチ３の内周面に摺動可能に当接している。 2 and 3, the upper end portion of the inner peripheral surface of the through hole of the die 2 is formed with a diameter larger than that of the portion other than the upper end portion.
The outer peripheral surface of the lower punch 3 is in slidable contact with a portion other than the upper end portion of the inner peripheral surface of the through hole of the die 2. As shown in FIG. 2A, the upper end surface of the die 2 and the upper end surface of the lower punch 3 are flush with the upper end portion of the inner periphery of the die 2 and the outer peripheral surface of the lower punch 3. A slight gap G is formed between the upper end portion. The gap G is provided for the purpose of forming a portion of the outer peripheral surface of the molded product 50 other than the press-fit guide portion 54 with a diameter larger than that of the press-fit guide portion 54.
The outer peripheral surface of the core rod 4 is slidably in contact with the inner peripheral surface of the lower punch 3.

図３（ｅ）に示されるように、上パンチ５の下端部は、該下端部以外の部分より一段縮径して形成されている。上パンチ５の下端部は、下パンチ３の内部に挿入可能とされており、図３（ｅ）の状態で、上パンチ５の下端部の外周面は、下パンチ３の内周面に摺動可能に当接している。また、上パンチ５の下端面は、コアロッド４の上端面に当接している。また、上パンチ５において下端部より上側に位置する大径部分の外周面は、ダイ２の内周面に摺動可能に当接している。   As shown in FIG. 3E, the lower end portion of the upper punch 5 is formed with a diameter reduced by one step from the portion other than the lower end portion. The lower end of the upper punch 5 can be inserted into the lower punch 3, and the outer peripheral surface of the lower end of the upper punch 5 slides on the inner peripheral surface of the lower punch 3 in the state shown in FIG. Abuts in a movable manner. The lower end surface of the upper punch 5 is in contact with the upper end surface of the core rod 4. Further, the outer peripheral surface of the large-diameter portion located above the lower end portion in the upper punch 5 is slidably in contact with the inner peripheral surface of the die 2.

また、図４において、この粉末成形装置１は、ダイ（金型）２の粉末成形領域６に向けて往復移動可能とされ、該粉末成形領域６に第１粉末５１を供給する第１粉末供給部（第１フィーダカップ）１１と、粉末成形領域６に向けて往復移動可能とされ、予め該粉末成形領域６に供給された第１粉末５１を圧縮するように仮押し可能な仮押し機構８と、粉末成形領域６に向けて往復移動可能とされ、該粉末成形領域６において予め仮押しされた第１粉末５１上に第２粉末５２を供給する第２粉末供給部（第２フィーダカップ）１２と、を備えている。   In FIG. 4, the powder molding apparatus 1 is capable of reciprocating toward a powder molding region 6 of a die (die) 2 and supplies a first powder 51 to the powder molding region 6. Temporary pressing mechanism 8 that can reciprocate toward the part (first feeder cup) 11 and the powder molding region 6 and can temporarily press the first powder 51 supplied to the powder molding region 6 in advance. And a second powder supply unit (second feeder cup) that is capable of reciprocating toward the powder molding region 6 and that supplies the second powder 52 onto the first powder 51 that is preliminarily pressed in the powder molding region 6. 12.

図４に示される上面視において、第１粉末供給部１１の往復移動方向Ｍ１１と、第２粉末供給部１２の往復移動方向Ｍ１２とは、粉末成形領域６で互いに垂直に交差するように配置されている。また、第２粉末供給部１２の往復移動方向Ｍ１２と、仮押し機構８の往復移動方向Ｍ８とは、互いに同一方向であり、第２粉末供給部１２と仮押し機構８とは、粉末成形領域６を挟んで対向配置されている。   In the top view shown in FIG. 4, the reciprocating direction M11 of the first powder supply unit 11 and the reciprocating direction M12 of the second powder supply unit 12 are arranged so as to intersect each other vertically in the powder forming region 6. ing. Further, the reciprocating direction M12 of the second powder supply unit 12 and the reciprocating direction M8 of the temporary pressing mechanism 8 are the same direction, and the second powder supplying unit 12 and the temporary pressing mechanism 8 are in the powder forming region. 6 are arranged opposite to each other.

詳しくは、第１粉末供給部１１は、往復移動方向Ｍ１１の前進端位置において、粉末成形領域６の複数の充填部７の上部を覆うように配置され、この状態で、これら充填部７に第１粉末５１を供給可能である。また、第２粉末供給部１２は、往復移動方向Ｍ１２の前進端位置において、粉末成形領域６の複数の充填部７の上部を覆うように配置され、この状態で、これら充填部７に第２粉末５２を供給可能である。   Specifically, the first powder supply unit 11 is disposed so as to cover the upper portions of the plurality of filling units 7 in the powder forming region 6 at the forward end position in the reciprocating movement direction M11. One powder 51 can be supplied. In addition, the second powder supply unit 12 is disposed so as to cover the upper portions of the plurality of filling units 7 in the powder molding region 6 at the forward end position in the reciprocating movement direction M12. Powder 52 can be supplied.

また、仮押し機構８は、往復移動方向Ｍ８の前進端位置において、粉末成形領域６の複数の充填部７上に対応して配置される筒状の仮押しパンチ９を備えている（図２（ｃ）を参照）。仮押しパンチ９は、上下に往復移動可能とされており、その下方へ向けた移動の端部において、充填部７内の第１粉末５１を下パンチ３へ向けて仮押しするようになっている。   Further, the temporary pressing mechanism 8 includes a cylindrical temporary pressing punch 9 disposed corresponding to the plurality of filling portions 7 in the powder forming region 6 at the forward end position in the reciprocating movement direction M8 (FIG. 2). (See (c)). The temporary pressing punch 9 can be reciprocated up and down, and temporarily presses the first powder 51 in the filling portion 7 toward the lower punch 3 at the end of the downward movement. Yes.

そして、図４において、この粉末成形装置１は、これら充填部７の配列方向と、第２粉末供給部１２の往復移動方向Ｍ１２とが、互いに垂直となるように配置されている。具体的に、図４に示される上面視で、複数の充填部７の共通軸Ｏ同士を通る仮想線と、第２粉末供給部１２の往復移動方向Ｍ１２とは、互いに垂直に交差するように配置されている。   In FIG. 4, the powder molding apparatus 1 is arranged such that the arrangement direction of the filling parts 7 and the reciprocating movement direction M12 of the second powder supply part 12 are perpendicular to each other. Specifically, in a top view shown in FIG. 4, the imaginary line passing through the common axes O of the plurality of filling units 7 and the reciprocating direction M12 of the second powder supply unit 12 intersect each other perpendicularly. Is arranged.

また、図５〜図８に示されるように、第１粉末供給部１１は、充填部７から排出された成形品５０を、粉末成形領域６に向けた前進移動によって該粉末成形領域６の外部へ向けて排出させる払い出し機構１３を備えている。   As shown in FIGS. 5 to 8, the first powder supply unit 11 moves the molded product 50 discharged from the filling unit 7 to the outside of the powder molding region 6 by moving forward toward the powder molding region 6. A payout mechanism 13 is provided for discharging toward the front.

図５に示される上面視において、払い出し機構１３は、第１粉末供給部１１の往復移動方向Ｍ１１に対して交差する方向に往復移動可能なスライド部１４と、スライド部１４の往復移動方向Ｍ１４に沿うように該スライド部１４に複数形成され、それぞれが成形品５０を保持可能な保持部１５と、を備えている。本実施形態では、スライド部１４の往復移動方向Ｍ１４と、第１粉末供給部１１の往復移動方向Ｍ１１とが、互いに垂直に交差するように配置されている。   In the top view shown in FIG. 5, the dispensing mechanism 13 includes a slide part 14 that can reciprocate in a direction that intersects the reciprocation direction M11 of the first powder supply part 11, and a reciprocation direction M14 of the slide part 14. A plurality of slide parts 14 are formed so as to be along the holding parts 15, each of which can hold the molded product 50. In this embodiment, the reciprocating direction M14 of the slide part 14 and the reciprocating direction M11 of the first powder supply part 11 are arranged so as to intersect perpendicularly to each other.

具体的に、図５〜図７において、スライド部１４は、帯板状をなすスライド本体１６を有し、該スライド本体１６は、ダイ２上に接近配置され、往復移動方向Ｍ１４に沿って延びているとともに、その厚さ方向が第１粉末供給部１１の往復移動方向Ｍ１１を向いている。また、スライド本体１６の外面のうち、第１粉末供給部１１の往復移動方向Ｍ１１の前進端側（図５、図６における左側）を向く面には、前記前進端側に向けて突出する突起部１７が、往復移動方向Ｍ１４に互いに間隔をあけて複数配設されている。そして、隣り合う一対の突起部１７と、これら突起部１７の間に位置するスライド本体１６部分とに囲まれるように、前記保持部１５が形成されている。このように形成された保持部１５は、成形品５０の外周面を３点支持するようになっている。   5-7, the slide part 14 has the slide main body 16 which makes | forms a strip | belt-plate shape, This slide main body 16 is arrange | positioned closely on the die | dye 2, and extends along the reciprocating movement direction M14. In addition, the thickness direction of the first powder supply unit 11 faces the reciprocating movement direction M11. Further, on the surface of the outer surface of the slide body 16 that faces the forward end side (left side in FIGS. 5 and 6) of the first powder supply unit 11 in the reciprocating direction M11, a protrusion that protrudes toward the forward end side. A plurality of portions 17 are arranged at intervals in the reciprocating movement direction M14. The holding portion 15 is formed so as to be surrounded by a pair of adjacent protruding portions 17 and a portion of the slide main body 16 positioned between the protruding portions 17. The holding part 15 formed in this way supports the outer peripheral surface of the molded product 50 at three points.

また、図６及び図８において、第１粉末供給部１１には、その往復移動方向Ｍ１１の前進端位置において、粉末成形領域６の複数の充填部７の上方を覆うように形成された供給室１８が形成されている。供給室１８は、天壁と内周壁とを有しており、下方は開口されている。また、供給室１８には、前記前進端位置において、複数の充填部７の上方にそれぞれ対応するように配置される複数の筒部１９が配設されている。筒部１９の下端部は、供給室１８内に開口されており、筒部１９は、その内部を通して充填部７に第１粉末５１を供給可能とされている。これら筒部１９の下端開口部は、充填部７の配列方向に対応するように、往復移動方向Ｍ１１に沿って配列している。   6 and 8, the first powder supply unit 11 has a supply chamber formed so as to cover the upper part of the plurality of filling units 7 in the powder molding region 6 at the forward end position in the reciprocating movement direction M11. 18 is formed. The supply chamber 18 has a top wall and an inner peripheral wall, and the lower part is opened. In the supply chamber 18, a plurality of cylindrical portions 19 are disposed at the forward end positions so as to correspond to the upper portions of the plurality of filling portions 7, respectively. A lower end portion of the cylindrical portion 19 is opened in the supply chamber 18, and the cylindrical portion 19 can supply the first powder 51 to the filling portion 7 through the inside. The lower end openings of the cylindrical portions 19 are arranged along the reciprocating movement direction M11 so as to correspond to the arrangement direction of the filling portions 7.

また、特に図示しないが、第２粉末供給部１２には、その往復移動方向Ｍ１２の前進端位置において、粉末成形領域６の複数の充填部７の上方を覆うように形成された供給室１８が形成されている。また、供給室１８には、前記前進端位置において、複数の充填部７の上方にそれぞれ対応するように配置される複数の筒部１９が配設されている。筒部１９の下端部は、供給室１８内に開口されており、筒部１９は、その内部を通して充填部７に第２粉末５２を供給可能とされている。これら筒部１９の下端開口部は、充填部７の配列方向に対応するように、往復移動方向Ｍ１２に垂直な方向（往復移動方向Ｍ１１）に沿って配列している。   Although not particularly illustrated, the second powder supply unit 12 has a supply chamber 18 formed so as to cover the top of the plurality of filling units 7 in the powder molding region 6 at the forward end position in the reciprocating movement direction M12. Is formed. In the supply chamber 18, a plurality of cylindrical portions 19 are disposed at the forward end positions so as to correspond to the upper portions of the plurality of filling portions 7, respectively. The lower end portion of the cylindrical portion 19 is opened in the supply chamber 18, and the cylindrical portion 19 can supply the second powder 52 to the filling portion 7 through the inside. The lower end openings of the cylindrical portions 19 are arranged along a direction perpendicular to the reciprocating movement direction M12 (reciprocating movement direction M11) so as to correspond to the arrangement direction of the filling portions 7.

次に、本実施形態の粉末成形装置１により成形品５０を成形する手順について、図２、図３及び図９を参照して説明する。尚、図９に示される各グラフは、ダイ２、下パンチ３、上パンチ５、仮押し機構８、第１粉末供給部１１及び第２粉末供給部１２の、成形の１サイクル（単位工程）あたりの動作を説明するものである。図９において、横軸は時間（位相）を表している。また縦軸は、ダイ２、下パンチ３及び上パンチ５については鉛直方向の変位量（位置）を表し、仮押し機構８、第１粉末供給部１１及び第２粉末供給部１２については水平方向の変位量を表している。図９では、横軸の中央（１８０°付近）において成形品５０が成形されるようになっている。   Next, the procedure for molding the molded product 50 by the powder molding apparatus 1 of the present embodiment will be described with reference to FIGS. Each graph shown in FIG. 9 shows one cycle of molding (unit process) of the die 2, the lower punch 3, the upper punch 5, the temporary pressing mechanism 8, the first powder supply unit 11 and the second powder supply unit 12. This is a description of the operation. In FIG. 9, the horizontal axis represents time (phase). The vertical axis represents the amount of displacement (position) in the vertical direction for the die 2, the lower punch 3 and the upper punch 5, and the horizontal direction for the temporary pressing mechanism 8, the first powder supply unit 11 and the second powder supply unit 12. Represents the amount of displacement. In FIG. 9, the molded product 50 is molded at the center of the horizontal axis (around 180 °).

図２（ａ）に示されるように、まず、ダイ２の上端面と下パンチ３の上端面とが面一とされた状態（図９における横軸２４０°付近）から、第１粉末供給部１１が、粉末成形領域６に向けて前進する（図９における横軸２７０°付近）。   As shown in FIG. 2A, first, the first powder supply unit from the state where the upper end surface of the die 2 and the upper end surface of the lower punch 3 are flush with each other (around 240 ° in the horizontal axis in FIG. 9). 11 advances toward the powder forming region 6 (around 270 ° in the horizontal axis in FIG. 9).

次いで、図２（ｂ）に示されるように、第１粉末供給部１１が粉末成形領域６上に配置された状態から、ダイ２が下パンチ３に対して上昇し、充填部７に第１粉末５１が供給される（図９における横軸３００°付近）。尚、第１粉末供給部１１は、その前進端位置の粉末成形領域６上において、短い往復動をするようになっている。   Next, as shown in FIG. 2 (b), the die 2 rises with respect to the lower punch 3 from the state in which the first powder supply unit 11 is disposed on the powder molding region 6, and the filling unit 7 has the first Powder 51 is supplied (around 300 ° in the horizontal axis in FIG. 9). In addition, the 1st powder supply part 11 carries out the short reciprocation on the powder shaping | molding area | region 6 of the advance end position.

次いで、第１粉末供給部１１が粉末成形領域６上から後退し、ダイ２が下パンチ３に対してさらに上昇し、仮押し機構８が、粉末成形領域６に向けて前進する（図９における横軸３３０°付近）。   Next, the first powder supply unit 11 is retracted from above the powder molding region 6, the die 2 is further raised with respect to the lower punch 3, and the temporary pressing mechanism 8 is advanced toward the powder molding region 6 (in FIG. 9). Horizontal axis around 330 °).

図２（ｃ）は、仮押し機構８が粉末成形領域６上に配置された状態を示しており、この状態で、仮押しパンチ９が充填部７の上方に位置している。仮押しパンチ９は、充填部７に向けて下降し、該充填部７内の第１粉末５１を、金型内に向けて圧縮するように仮押しする（図９における横軸０°付近）。この仮押しは、充填部７内の第１粉末５１の粉末密度を若干高めることにより、後述する第２粉末５２が該第１粉末５１に混合されないようにするものである。   FIG. 2C shows a state where the temporary pressing mechanism 8 is arranged on the powder molding region 6, and in this state, the temporary pressing punch 9 is positioned above the filling portion 7. The temporary pressing punch 9 descends toward the filling portion 7 and temporarily presses the first powder 51 in the filling portion 7 so as to be compressed toward the mold (near the horizontal axis of 0 ° in FIG. 9). . This temporary pressing slightly increases the powder density of the first powder 51 in the filling portion 7 so that the second powder 52 described later is not mixed with the first powder 51.

次いで、仮押し機構８が粉末成形領域６上から後退し、第２粉末供給部１２が、粉末成形領域６に向けて前進する（図９における横軸４５°付近）。   Next, the temporary pressing mechanism 8 moves backward from above the powder molding region 6 and the second powder supply unit 12 moves forward toward the powder molding region 6 (around 45 ° in the horizontal axis in FIG. 9).

次いで、図３（ｄ）に示されるように、第２粉末供給部１２が粉末成形領域６上に配置された状態で、充填部７に第２粉末５２が供給される（図９における横軸７５°付近）。尚、第２粉末供給部１２は、その前進端位置の粉末成形領域６上において、短い往復動をするようになっている。   Next, as shown in FIG. 3D, the second powder 52 is supplied to the filling unit 7 in a state where the second powder supply unit 12 is disposed on the powder molding region 6 (the horizontal axis in FIG. 9). Around 75 °). In addition, the 2nd powder supply part 12 carries out the short reciprocation on the powder shaping | molding area | region 6 of the advance end position.

次いで、第２粉末供給部１２が粉末成形領域６上から後退し、上パンチ５が、下パンチ３に向けて下降する（図９における横軸１２０°付近）。図３（ｅ）に示されるように、上パンチ５がダイ２の充填部７内に挿入されると、上パンチ５がさらに下パンチ３へ向けて下降していくのにともなって、ダイ２が下パンチ３に対して若干下降する（図９における横軸１８０°付近）。
このように、ダイ２の充填部７内において、上パンチ５と下パンチ３とが相対的に接近移動することにより、これらの間に挟まれた第１、第２粉末５１、５２が圧縮されるとともに、成形品５０が成形される。 Next, the second powder supply unit 12 is retracted from above the powder forming region 6, and the upper punch 5 is lowered toward the lower punch 3 (around 120 ° in the horizontal axis in FIG. 9). As shown in FIG. 3 (e), when the upper punch 5 is inserted into the filling portion 7 of the die 2, as the upper punch 5 further descends toward the lower punch 3, the die 2 Slightly descends with respect to the lower punch 3 (around 180 ° in the horizontal axis in FIG. 9).
As described above, the upper punch 5 and the lower punch 3 relatively move in the filling portion 7 of the die 2, thereby compressing the first and second powders 51 and 52 sandwiched therebetween. At the same time, the molded product 50 is molded.

次いで、上パンチ５が上昇してダイ２の充填部７から離脱し、ダイ２が下パンチ３に対して下降して（図９における横軸２１０°付近）、図３（ｆ）に示されるように、ダイ２の上端面と下パンチ３の上端面とが面一とされた状態（図９における横軸２４０°付近）となり、これにともなって、成形品５０が充填部７から上方に排出される。   Next, the upper punch 5 is lifted and separated from the filling portion 7 of the die 2, and the die 2 is lowered with respect to the lower punch 3 (around 210 ° in the horizontal axis in FIG. 9), as shown in FIG. 3 (f). In this way, the upper end surface of the die 2 and the upper end surface of the lower punch 3 are flush with each other (around 240 ° in the horizontal axis in FIG. 9), and accordingly, the molded product 50 is moved upward from the filling portion 7. Discharged.

次いで、再び第１粉末供給部１１が、粉末成形領域６に向けて前進することにより、該第１粉末供給部１１の前進側の端部に配設された払い出し機構１３が、成形品５０を粉末成形領域６の外部に向けて排出する（図９における横軸２７０°付近）。払い出し機構１３の作用については、後述する。   Next, when the first powder supply unit 11 moves forward again toward the powder molding region 6, the dispensing mechanism 13 disposed at the end on the forward side of the first powder supply unit 11 causes the molded product 50 to move. It discharges toward the outside of the powder molding region 6 (around 270 ° in the horizontal axis in FIG. 9). The operation of the payout mechanism 13 will be described later.

前述の工程が繰り返されることにより、成形品５０が連続的に成形される。
尚、図９において、符号ａは上ラムストローク、符号ｂは製品（成形品）高さ、符号ｄは上部材料（第２粉末）フィーダーストローク、符号ｅは上部材料充填、符号ｆはダイ充填、符号ｈは上パンチホールドダウンストローク、符号ｉは仮押しアンダーフィル、符号ｊは下部材料（第１粉末）充填、符号ｋは下部材料フィーダーストローク、符号ｌは仮押しフィーダーストローク、を示している。上部材料フィーダーストロークｄは、下部材料フィーダーストロークｋより小さく、仮押しフィーダーストロークｌより大きい。 By repeating the above-described steps, the molded product 50 is continuously molded.
In FIG. 9, symbol a is the upper ram stroke, symbol b is the product (molded product) height, symbol d is the upper material (second powder) feeder stroke, symbol e is the upper material filling, symbol f is the die filling, Reference symbol h indicates an upper punch hold-down stroke, reference symbol i indicates a temporary press underfill, reference symbol j indicates a lower material (first powder) filling, reference symbol k indicates a lower material feeder stroke, and reference symbol l indicates a preliminary press feeder stroke. The upper material feeder stroke d is smaller than the lower material feeder stroke k and larger than the temporary pressing feeder stroke l.

以上説明した粉末成形装置１では、ダイ２の粉末成形領域６に、まず第１粉末供給部１１が第１粉末５１を供給し、該粉末成形領域６に供給された第１粉末５１を、仮押し機構８が仮押しして粉末密度を高め、該第１粉末５１上に、第２粉末供給部１２が第２粉末５２を供給した状態で、粉末全体を圧縮成形するようにしている。また、圧縮成形後には、再び第１粉末供給部１１が粉末成形領域６に移動するが、この移動によって、圧縮成形された成形品５０が粉末成形領域６の外部へと払い出されるとともに、次工程の第１粉末５１が粉末成形領域６に供給されて、前述した工程が繰り返される。また、ダイ２の粉末成形領域６には、成形品５０の形状に対応する充填部７が複数形成されており、単位工程あたりに成形品５０を複数成形（多数個取り）できるようになっている。   In the powder molding apparatus 1 described above, the first powder supply unit 11 first supplies the first powder 51 to the powder molding region 6 of the die 2, and the first powder 51 supplied to the powder molding region 6 is temporarily stored. The pressing mechanism 8 temporarily presses to increase the powder density, and the entire powder is compression-molded in a state where the second powder supply unit 12 supplies the second powder 52 onto the first powder 51. In addition, after the compression molding, the first powder supply unit 11 again moves to the powder molding region 6, and by this movement, the molded product 50 that has been compression molded is discharged to the outside of the powder molding region 6, and the next step The first powder 51 is supplied to the powder molding region 6 and the above-described steps are repeated. In addition, a plurality of filling portions 7 corresponding to the shape of the molded product 50 are formed in the powder molding region 6 of the die 2, so that a plurality of molded products 50 can be molded per unit process. Yes.

本実施形態の粉末成形装置１によれば、複数の充填部７の配列方向と、第２粉末供給部１２の往復移動方向Ｍ１２とが、互いに垂直となるように配置されているので、各充填部７の第１粉末５１上に供給される第２粉末５２の供給量（充填量）のバラつきが抑制される。すなわち、例えば図１０に示されるように、本実施形態とは異なり、充填部７の配列方向と第２粉末供給部１２の往復移動方向Ｍ１２とが互いに垂直とはならない配置である場合（図示の例では互いに同一方向）、これら充填部７のうち、第２粉末供給部１２の移動の前進端側に位置する一の充填部７Ｄより、第２粉末供給部１２の移動の後退端側に位置する他の充填部７Ｃ上に該第２粉末供給部１２が配置された状態が長く続くため、前記他の充填部７Ｃに対する第２粉末５２の供給量が、前記一の充填部７Ｄに対する前記供給量より多くなる。この場合、焼結後の製品の品質が確保できなくなるおそれがあるため、前記一の充填部７Ｄへの第２粉末５２の供給量を確保するために、第２粉末５２の供給量を全体的に増大させる（マージンを大きくとる）必要が生じて、製造費用が嵩んでしまうことになる。   According to the powder molding apparatus 1 of the present embodiment, the arrangement direction of the plurality of filling units 7 and the reciprocating movement direction M12 of the second powder supply unit 12 are arranged so as to be perpendicular to each other. Variation in the supply amount (filling amount) of the second powder 52 supplied onto the first powder 51 of the part 7 is suppressed. That is, for example, as shown in FIG. 10, unlike the present embodiment, the arrangement direction of the filling unit 7 and the reciprocating movement direction M12 of the second powder supply unit 12 are not perpendicular to each other (shown in the figure). In the example, the same direction as each other), among these filling parts 7, it is located on the backward end side of the movement of the second powder supply part 12 from one filling part 7D located on the forward end side of the movement of the second powder supply part 12. Since the state where the second powder supply unit 12 is arranged on the other filling unit 7C continues for a long time, the supply amount of the second powder 52 to the other filling unit 7C is the supply to the one filling unit 7D. More than the amount. In this case, since the quality of the product after sintering may not be ensured, in order to secure the supply amount of the second powder 52 to the one filling part 7D, the supply amount of the second powder 52 is set as a whole. Therefore, the manufacturing cost increases.

一方、図４に示される本実施形態によれば、第２粉末供給部１２が往復移動する際に、複数の充填部７Ａ、７Ｂ上に該第２粉末供給部１２が配置される時間が互いに同等となるので、これら充填部７Ａ、７Ｂに対する第２粉末５２の供給量が均一となり、第２粉末５２の性能が重視される製品の品質が安定して確保されるのである。またこのように、複数の充填部７Ａ、７Ｂに対する第２粉末５２の供給量のバラつきが抑制されるから、第２粉末５２の供給量を全体に増大させるような必要が生じないばかりか、該第２粉末５２の供給量を削減可能であり、よって製造費用を削減できる。   On the other hand, according to the present embodiment shown in FIG. 4, when the second powder supply unit 12 reciprocates, the time during which the second powder supply unit 12 is arranged on the plurality of filling units 7A and 7B is mutually Therefore, the supply amount of the second powder 52 to the filling parts 7A and 7B becomes uniform, and the quality of the product in which the performance of the second powder 52 is regarded as important is stably secured. In addition, since the variation in the supply amount of the second powder 52 to the plurality of filling portions 7A and 7B is suppressed in this way, it is not only necessary to increase the supply amount of the second powder 52 as a whole. The supply amount of the second powder 52 can be reduced, and thus the manufacturing cost can be reduced.

また本実施形態において、第１粉末供給部１１の往復移動方向Ｍ１１と、複数の充填部７Ａ、７Ｂの配列方向とは、互いに垂直となってはいないから、第１粉末供給部１１が粉末成形領域６に向けて前進移動し成形品５０を払い出すにあたって、第１粉末供給部１１の前進側を向く端部には、まず該第１粉末供給部１１の後退端側に位置する充填部７Ｂの成形品５０Ｂが当接され、次いで該第１粉末供給部１１の前進端側に位置する充填部７Ａの成形品５０Ａが当接する。
本実施形態の粉末成形装置１によれば、第１粉末供給部１１の前進側の端部に払い出し機構１３が設けられているので、下記の作用効果を奏する。 In this embodiment, since the reciprocating direction M11 of the first powder supply unit 11 and the arrangement direction of the plurality of filling units 7A and 7B are not perpendicular to each other, the first powder supply unit 11 is powder-molded. At the end of the first powder supply unit 11 facing the advance side, the filling unit 7B located on the backward end side of the first powder supply unit 11 is moved forward toward the region 6 to pay out the molded product 50. Next, the molded product 50B of the filling portion 7A located on the forward end side of the first powder supply unit 11 contacts.
According to the powder molding apparatus 1 of the present embodiment, since the dispensing mechanism 13 is provided at the forward end of the first powder supply unit 11, the following functions and effects are achieved.

すなわち、第１粉末供給部１１が、粉末成形領域６に向けて前進移動すると、複数の充填部７Ａ、７Ｂのうち、まず該第１粉末供給部１１の往復移動方向Ｍ１１の後退端側に位置する後方の充填部７Ｂに対応する成形品５０Ｂが、払い出し機構１３の複数の保持部１５のうち、一の保持部１５Ｂに保持される（図５を参照）。この状態から、払い出し機構１３のスライド部１４を該スライド部１４の往復移動方向Ｍ１４に移動させることにより、前記一の保持部１５Ｂに保持された後方の成形品５０Ｂが移動するとともに、第１粉末供給部１１の往復移動方向Ｍ１１の前進端側に位置する前方の充填部７Ａに対応する成形品５０Ａが、複数の保持部１５のうち、前記一の保持部１５Ｂとは異なる他の保持部１５Ａに対向配置される。この状態から、さらに第１粉末供給部１１が粉末成形領域６に向けて前進移動することにより、前方の成形品５０Ａが前記他の保持部１５Ａに保持される。このように、複数の保持部１５Ａ、１５Ｂにそれぞれ保持された成形品５０Ａ、５０Ｂ同士は、互いに当接することなく、粉末成形領域６の外部へと払い出される（排出される）ようになっている。   That is, when the first powder supply unit 11 moves forward toward the powder molding region 6, the first powder supply unit 11 is first positioned on the retreat end side in the reciprocating movement direction M11 of the first powder supply unit 11. The molded product 50B corresponding to the rear filling portion 7B is held by one holding portion 15B among the plurality of holding portions 15 of the dispensing mechanism 13 (see FIG. 5). From this state, by moving the slide portion 14 of the dispensing mechanism 13 in the reciprocating direction M14 of the slide portion 14, the rear molded product 50B held by the one holding portion 15B moves and the first powder The molded product 50A corresponding to the front filling portion 7A located on the forward end side in the reciprocating direction M11 of the supply unit 11 is the other holding unit 15A different from the one holding unit 15B among the plurality of holding units 15. Are arranged opposite to each other. From this state, the first powder supply unit 11 further moves forward toward the powder molding region 6, whereby the front molded product 50A is held by the other holding unit 15A. In this way, the molded products 50A and 50B respectively held by the plurality of holding portions 15A and 15B are discharged (discharged) to the outside of the powder molding region 6 without being in contact with each other. .

本実施形態によれば、第１粉末供給部１１の粉末成形領域６に向けた前進移動によって、多数個取りされた複数の成形品５０Ａ、５０Ｂを払い出す際に、これら成形品５０Ａ、５０Ｂ同士が互いにぶつかり合うようなことが防止される。よって、成形品５０の排出動作にともなう該成形品５０の割れ、欠け、変形等を防止でき、製品の品質が安定して確保されるのである。   According to the present embodiment, when a plurality of molded products 50A and 50B taken out by the forward movement toward the powder molding region 6 of the first powder supply unit 11 are dispensed, the molded products 50A and 50B are Are prevented from colliding with each other. Therefore, it is possible to prevent the molded product 50 from being cracked, chipped, deformed, etc. due to the discharging operation of the molded product 50, and to ensure the quality of the product stably.

尚、本発明は前述の実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。   The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

例えば、前述の実施形態では、第１粉末供給部１１の往復移動方向Ｍ１１と、第２粉末供給部１２の往復移動方向Ｍ１２とは、互いに垂直に交差するように配置されているとしたが、これに限定されるものではない。具体的に、本発明は、第２粉末供給部１２の往復移動方向Ｍ１２と、複数の充填部７の配列方向とが互いに垂直となるように配置されていればよいことから、第１粉末供給部１１の往復移動方向Ｍ１１と、第２粉末供給部１２の往復移動方向Ｍ１２との交差角は、垂直でなくてもよい。また、仮押し機構８の往復移動方向Ｍ８と、前記往復移動方向Ｍ１１、Ｍ１２との配置関係（交差角）についても同様であり、前述の実施形態に限定されるものではない。ただし、図４に示される本実施形態の配置とされることにより、第１粉末供給部１１の前進移動による成形品５０の払い出しスペースを容易に確保できることから、好ましい。   For example, in the above-described embodiment, the reciprocation direction M11 of the first powder supply unit 11 and the reciprocation direction M12 of the second powder supply unit 12 are arranged so as to intersect perpendicularly to each other. It is not limited to this. Specifically, in the present invention, since the reciprocating direction M12 of the second powder supply unit 12 and the arrangement direction of the plurality of filling units 7 need to be arranged to be perpendicular to each other, the first powder supply The crossing angle between the reciprocating direction M11 of the part 11 and the reciprocating direction M12 of the second powder supply unit 12 may not be vertical. The same applies to the positional relationship (crossing angle) between the reciprocating direction M8 of the temporary pushing mechanism 8 and the reciprocating directions M11 and M12, and is not limited to the above-described embodiment. However, the arrangement of the present embodiment shown in FIG. 4 is preferable because a space for discharging the molded product 50 by the forward movement of the first powder supply unit 11 can be easily secured.

また、本発明において、第２粉末供給部１２の往復移動方向Ｍ１２と、複数の充填部７の配列方向との交差角は、厳密に垂直である必要はなく、前述した作用効果が得られるような垂直に近い角度であればよい。つまり前述したように、第２粉末供給部１２の往復移動方向Ｍ１２と複数の充填部７の配列方向とが、互いに垂直となるように配置されていればよい。具体的に、図４において、隣り合う充填部７Ａ、７Ｂが、往復移動方向Ｍ１２に、少なくとも互いの一部同士を対応させるように（すなわち、往復移動方向Ｍ１１から見て、充填部７Ａ、７Ｂの少なくとも互いの一部同士が重なり合うように）配置されていてもよい。   In the present invention, the crossing angle between the reciprocating direction M12 of the second powder supply unit 12 and the arrangement direction of the plurality of filling units 7 does not have to be strictly perpendicular, so that the above-described effects can be obtained. Any angle close to vertical may be used. That is, as described above, it is only necessary that the reciprocating direction M12 of the second powder supply unit 12 and the arrangement direction of the plurality of filling units 7 are perpendicular to each other. Specifically, in FIG. 4, the filling portions 7A and 7B adjacent to each other correspond to at least a part of each other in the reciprocating movement direction M12 (that is, as seen from the reciprocating movement direction M11, the filling portions 7A and 7B). May be arranged such that at least a part of each other overlaps each other.

また、前述の実施形態では、図４において、充填部７が２つ形成されている例を用いて説明したが、粉末成形領域６に形成される充填部７の数は、これに限定されるものではなく、例えば３つ以上であってもよい。   In the above-described embodiment, the example in which two filling portions 7 are formed in FIG. 4 has been described. However, the number of filling portions 7 formed in the powder molding region 6 is limited to this. For example, it may be three or more.

また、払い出し機構１３は、第１粉末供給部１１の往復移動方向Ｍ１１に対して交差する方向に往復移動可能なスライド部１４と、該スライド部１４の往復移動方向Ｍ１４に沿うように該スライド部１４に複数形成され、それぞれが成形品５０を保持可能な保持部１５と、を備えるものであればよく、前述の実施形態で説明した構成に限定されない。   The dispensing mechanism 13 includes a slide portion 14 that can reciprocate in a direction intersecting the reciprocating direction M11 of the first powder supply unit 11, and the slide portion along the reciprocating direction M14 of the slide portion 14. As long as it is provided with a holding portion 15 that can hold the molded product 50, the configuration is not limited to that described in the above-described embodiment.

例えば、前述の実施形態では、スライド部１４の往復移動方向Ｍ１４と、第１粉末供給部１１の往復移動方向Ｍ１１とが、互いに垂直に交差するように配置されているとしたが、往復移動方向Ｍ１１に対する往復移動方向Ｍ１４の交差角は、垂直でなくてもよい。また、保持部１５が、成形品５０の外周面を３点支持するようになっているとしたが、これに限定されるものではなく、例えば、保持部１５の成形品５０側を向く外面が、上面視円弧状をなす凹曲面に形成されているとともに、保持部１５はこの凹曲面全体で成形品５０の外周面に当接して支持することとしてもよい。   For example, in the above-described embodiment, the reciprocating direction M14 of the slide unit 14 and the reciprocating direction M11 of the first powder supply unit 11 are arranged so as to intersect each other vertically. The crossing angle of the reciprocating direction M14 with respect to M11 may not be vertical. In addition, the holding unit 15 is configured to support the outer peripheral surface of the molded product 50 at three points. However, the present invention is not limited to this. For example, the outer surface of the holding unit 15 facing the molded product 50 side is Further, the concave portion may be formed in a concave curved surface as viewed from above, and the holding portion 15 may be supported by contacting the outer peripheral surface of the molded product 50 with the entire concave curved surface.

１ 粉末成形装置
２ ダイ（金型）
６ 粉末成形領域
７ 充填部
８ 仮押し機構
１１ 第１粉末供給部
１２ 第２粉末供給部
１３ 払い出し機構
１４ スライド部
１５ 保持部
５０ 成形品
５１ 第１粉末（安価な粉末材料）
５２ 第２粉末（高価な粉末材料）
Ｍ１１ 第１粉末供給部の往復移動方向
Ｍ１２ 第２粉末供給部の往復移動方向
Ｍ１４ スライド部の往復移動方向 1 Powder molding equipment 2 Die (die)
6 Powder molding region 7 Filling unit 8 Temporary pressing mechanism 11 First powder supply unit 12 Second powder supply unit 13 Dispensing mechanism 14 Slide unit 15 Holding unit 50 Molded product 51 First powder (inexpensive powder material)
52 Second powder (expensive powder material)
M11 Reciprocating direction of first powder supply unit M12 Reciprocating direction of second powder supply unit M14 Reciprocating direction of slide unit

Claims (2)

金型の粉末成形領域に往復移動可能とされ、前記粉末成形領域に第１粉末を供給する第１粉末供給部と、
前記粉末成形領域に供給された第１粉末を圧縮するように仮押し可能な仮押し機構と、
前記粉末成形領域に往復移動可能とされ、前記粉末成形領域に第２粉末を供給する第２粉末供給部と、を備え、
前記粉末成形領域には、成形品の形状に対応する充填部が複数形成され、
これら充填部の配列方向と、前記第２粉末供給部の往復移動方向とが、互いに垂直となるように配置されていることを特徴とする粉末成形装置。 A first powder supply unit that is reciprocally movable to a powder molding region of the mold and that supplies the first powder to the powder molding region;
A temporary pressing mechanism capable of temporary pressing so as to compress the first powder supplied to the powder molding region;
A second powder supply unit configured to be reciprocally movable to the powder molding region and supplying a second powder to the powder molding region,
A plurality of filling portions corresponding to the shape of the molded product are formed in the powder molding region,
The powder molding apparatus, wherein the arrangement direction of the filling parts and the reciprocating direction of the second powder supply part are arranged to be perpendicular to each other. 請求項１に記載の粉末成形装置であって、
前記第１粉末供給部の往復移動方向と、前記第２粉末供給部の往復移動方向とは、互いに交差しており、
前記第１粉末供給部は、前記充填部から排出された成形品を、前記粉末成形領域に向けた前進移動によって該粉末成形領域の外部へ向けて排出させる払い出し機構を備え、
前記払い出し機構は、
前記第１粉末供給部の往復移動方向に対して交差する方向に往復移動可能なスライド部と、
前記スライド部の往復移動方向に沿うように該スライド部に複数形成され、それぞれが成形品を保持可能な保持部と、を備えることを特徴とする粉末成形装置。 The powder molding apparatus according to claim 1,
The reciprocating direction of the first powder supply unit and the reciprocating direction of the second powder supply unit intersect each other,
The first powder supply unit includes a discharge mechanism that discharges the molded product discharged from the filling unit toward the outside of the powder molding region by a forward movement toward the powder molding region,
The payout mechanism is
A slide part capable of reciprocating in a direction intersecting the reciprocating direction of the first powder supply part;
A powder forming apparatus, comprising: a plurality of holding portions formed on the slide portion so as to follow a reciprocating direction of the slide portion, each of which can hold a molded product.
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