JPH09301486A - Hopper for powder molding machine - Google Patents
Hopper for powder molding machineInfo
- Publication number
- JPH09301486A JPH09301486A JP8114917A JP11491796A JPH09301486A JP H09301486 A JPH09301486 A JP H09301486A JP 8114917 A JP8114917 A JP 8114917A JP 11491796 A JP11491796 A JP 11491796A JP H09301486 A JPH09301486 A JP H09301486A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- hopper
- slider
- powder
- molding machine
- 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.)
- Granted
Links
Landscapes
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Powder Metallurgy (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、粉末成形機に装
備されている原料粉末ホッパーにしばしば生じる架橋
（ブリッジング）の防止に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to prevention of bridging which often occurs in a raw material powder hopper equipped in a powder molding machine.
【０００２】[0002]
【従来の技術】粉末成形機のホッパーは、一般には円筒
形の胴部に続く円錐形の底部の中央に排出管を備える形
状で、粉末成形機の後部上方に装備される。そして、排
出管とフィード・シューをフレキシブル・ホースで接続
し、フィード・シューから成形金型内に、ホッパー内の
原料粉末を供給するようになっている。なお、排出管に
開閉弁を設けて粉末の供給を制御することは慣用手段な
ので、以下の説明および図面には開閉弁を省略した。2. Description of the Related Art The hopper of a powder molding machine is generally provided with a discharge pipe at the center of a conical bottom part following a cylindrical body part, and is installed above the rear part of the powder molding machine. Then, the discharge pipe and the feed shoe are connected by a flexible hose, and the raw material powder in the hopper is supplied from the feed shoe into the molding die. Since it is a conventional means to control the powder supply by providing an opening / closing valve on the discharge pipe, the opening / closing valve is omitted in the following description and drawings.
【０００３】[0003]
【発明が解決しようとする課題】粉末冶金用の原料粉末
は一般に形状が不規則で、しかも粒度および粒度分布，
比重あるいは材質の異なる数種の粉末の混合物なので相
互の摩擦抵抗が大きく、そのためホッパーからの流出中
にしばしば、排出管の入口付近で詰まってしまうことが
ある。この現象はホッパーの縦断面ではあたかも断崖に
橋を架けたように見えるために架橋（ブリッジング）と
よばれ、その効果的で且つ簡便な防止策が求められてい
た。The raw material powder for powder metallurgy generally has an irregular shape, and the particle size and particle size distribution are
Since they are a mixture of several kinds of powders having different specific gravities or materials, mutual frictional resistance is large, so that they often become clogged near the inlet of the discharge pipe during the outflow from the hopper. This phenomenon is called bridging because it looks as if a bridge was built on a cliff in the vertical cross section of the hopper, and an effective and simple preventive measure has been demanded.
【０００４】[0004]
【課題を解決するための手段】架橋を防ぐためには、詰
まりかけた粉体に攪拌，振動，加・減圧などの外力を与
えて解すのが有効であるが、それも外部のエネルギーに
よらず、粉体の流動を利用して自動的に作動する方式の
ものが望ましい。[Means for Solving the Problems] In order to prevent cross-linking, it is effective to apply an external force such as stirring, vibration, pressurization / decompression, etc. to the clogged powder, but it does not depend on external energy It is desirable to use a system that automatically operates by utilizing the flow of powder.
【０００５】そこでこの発明はホッパー内に、下端が漏
斗状に開いたパイプをコイルバネで懸垂させてその下端
を排出管の真上に臨ませ、このパイプが粉体の流下圧お
よびコイルバネの反発力の作用で上下動を反復するよう
構成した。Therefore, according to the present invention, a pipe having a funnel-shaped lower end is suspended in the hopper by a coil spring so that the lower end faces directly above the discharge pipe. This pipe causes the powder downward pressure and the repulsive force of the coil spring. It was configured to repeat the vertical movement by the action of.
【０００６】この構成により、パイプ下端の漏斗状部の
上下動に伴う外力が架橋を生じ易い部位の粉体に作用し
て架橋の発生を未然に防ぎ、若し出来かけても直ちに解
してしまう。そのため架橋発生に伴う作業効率の低下や
粉末の偏析などのトラブルを解消することができる。With this structure, the external force associated with the vertical movement of the funnel-shaped portion at the lower end of the pipe acts on the powder in the portion where bridging is likely to occur, and the bridging is prevented from occurring. I will end up. Therefore, troubles such as a decrease in work efficiency and powder segregation due to the occurrence of crosslinking can be solved.
【０００７】[0007]
【発明の実施の形態】この発明の一実施例に係るホッパ
ーの縦断面主要部を図１に示す。図において１は粉末
（Ａ）を貯えたホッパーの本体で、その底部の中央に排
出管２を備え、上部は蓋３で覆われている。ホッパーの
中心には下端に末広がりの漏斗状部Ｆを備えるパイプ４
がその下端を排出管２の真上に臨ませ、蓋から突き出た
上端部に装着したバネ抑え６および蓋に載せたコイルバ
ネ５によって、ホッパー内に昇降自在に懸垂されてい
る。バネ抑えはねじ込み式で、その位置を調整可能にな
っている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a main part of a vertical cross section of a hopper according to an embodiment of the present invention. In the figure, 1 is a main body of a hopper that stores powder (A), a discharge pipe 2 is provided in the center of the bottom portion, and an upper portion is covered with a lid 3. At the center of the hopper, a pipe 4 having a funnel-shaped portion F that widens toward the bottom.
Has its lower end directly above the discharge pipe 2, and is suspended in the hopper by a spring retainer 6 mounted on the upper end protruding from the lid and a coil spring 5 mounted on the lid so as to be able to move up and down. The spring retainer is a screw type and its position can be adjusted.
【０００８】パイプ４が蓋３の上に突き出た部分は案内
筒７で囲まれ、その内面に滑合するスライダー９がパイ
プ４の上端に載っている。このスライダー９は、少なく
ともその下面のパイプ４と接する部分はゴム様物質で作
られ、パイプ４の上端を気密に封じる。そしてパイプの
上昇時にはその先端で押し上げられ、パイプの下降時に
は、自重によりパイプとの接触を保ったまま一緒に下降
する。そして案内筒の内面に設けられているフランジ８
に当接した時点でスライダー９は停止するが、パイプ４
はスライダーを残して、更に下降を続けることができ
る。なお案内筒の内部は、常に大気と連通している。A portion of the pipe 4 protruding above the lid 3 is surrounded by a guide cylinder 7, and a slider 9 sliding on the inner surface of the guide cylinder 7 is mounted on the upper end of the pipe 4. This slider 9 is made of a rubber-like substance at least at a portion of its lower surface which is in contact with the pipe 4, and hermetically seals the upper end of the pipe 4. When the pipe rises, it is pushed up by its tip, and when the pipe descends, it descends together while maintaining contact with the pipe due to its own weight. And the flange 8 provided on the inner surface of the guide tube
The slider 9 stops when it comes into contact with the pipe 4
Can leave the slider and continue descending. The inside of the guide tube is always in communication with the atmosphere.
【０００９】図２はこのホッパーの原理を模式的に説明
する作動工程図で、白抜きの矢印が示す向きに順次移行
する。図２の左側が第一段階で、この状態から粉末の排
出を始めると、流下する粉体の圧力がパイプ４およびそ
の漏斗状部Ｆの外面に働き、パイプ４はコイルバネ５を
圧縮しつつ下降を始める。FIG. 2 is an operational process diagram for schematically explaining the principle of this hopper, which sequentially shifts in the direction indicated by the white arrow. The left side of FIG. 2 is the first stage, and when the discharge of the powder is started from this state, the pressure of the flowing powder acts on the outer surface of the pipe 4 and its funnel-shaped portion F, and the pipe 4 descends while compressing the coil spring 5. To start.
【００１０】同時に、パイプ４の内部は空気が粉末の流
れに吸い出されて負圧傾向になり、パイプ４に吸着され
たスライダー９は、その自重と相俟ってパイプと一体に
下降する。そしてフランジ８に当接して止まるが、その
時点におけるコイルバネ５の反発力を粉体の流下圧より
僅かに弱く設定してあるので、（図２の中央）パイプ４
は更に下降し、その上端がスライダー９から離れる。At the same time, the air in the pipe 4 is sucked by the powder flow and tends to have a negative pressure, and the slider 9 adsorbed to the pipe 4 descends together with the pipe together with its own weight. Then, it comes into contact with the flange 8 and stops, but since the repulsive force of the coil spring 5 at that time is set to be slightly weaker than the powder downward pressure, the pipe 4 (center of FIG. 2) is
Is further lowered, and its upper end is separated from the slider 9.
【００１１】スライダー９から離れると同時に大気が流
れ込んでパイプ４内が常圧に戻り、それが切っ掛けとな
って圧縮されていたコイルバネ５が反発し、（図２の右
側）パイプ４を上昇させる。これに伴い、フランジ８で
停止していたスライダー９もパイプに押し上げられて上
昇し、パイプ４の昇降の１サイクルが終了する。At the same time as leaving the slider 9, the atmosphere flows in and the inside of the pipe 4 returns to normal pressure, and the coil spring 5 that has been compressed due to this is repelled and the pipe 4 is raised (right side in FIG. 2). Along with this, the slider 9 stopped at the flange 8 is also pushed up by the pipe and ascended, and one cycle of ascending and descending the pipe 4 is completed.
【００１２】かくして、ホッパーから粉末を排出させて
いる間はパイプ４の昇降も、外力の供給を要せずに自動
的に反復される。そしてその度に排出管の入口付近の粉
末が漏斗状部Ｆで撹拌され解される結果、架橋の発生を
未然に防ぐことができる。Thus, while the powder is being discharged from the hopper, the up and down movement of the pipe 4 is automatically repeated without the need to supply external force. Then, each time the powder near the inlet of the discharge pipe is agitated and unraveled in the funnel-shaped portion F, it is possible to prevent the occurrence of crosslinking.
【００１３】[0013]
【発明の効果】この発明によればホッパーに組み付ける
撹拌装置が簡単な構造のもので済み、しかも、その装置
の駆動に外部からの動力供給を要しないため、極めて経
済的に架橋防止の目的を達成することができる。According to the present invention, the stirring device to be assembled to the hopper need only have a simple structure, and the driving of the device does not require external power supply. Can be achieved.
【図１】この発明に係るホッパーの、一実施例を説明す
る図面である。FIG. 1 is a diagram illustrating an embodiment of a hopper according to the present invention.
【図２】図１に示したホッパーの作動を説明する図面で
ある。FIG. 2 is a view for explaining the operation of the hopper shown in FIG.
Ａ…原料粉末 １…ホッパー，２…排出管，３…蓋 ４…パイプ，Ｆ…漏斗状部 ５…コイルバネ，６…バネ抑え ７…案内筒，８…フランジ，９…スライダー A ... Raw material powder 1 ... Hopper, 2 ... Discharge pipe, 3 ... Lid 4 ... Pipe, F ... Funnel-shaped part 5 ... Coil spring, 6 ... Spring restraint 7 ... Guide tube, 8 ... Flange, 9 ... Slider
Claims (3)
に排出管２を備える粉末成形機のホッパー１において、
下端が漏斗状に開いたパイプ４をホッパー内に昇降自在
に懸垂させ、その下端を排出管２の真上に臨ませたこと
を特徴とする粉末成形機のホッパー。1. A hopper 1 of a powder molding machine, comprising a discharge tube 2 in the center of a conical bottom part following a cylindrical body part,
A hopper for a powder molding machine, characterized in that a pipe 4 having a funnel-shaped lower end is suspended in a hopper so that the pipe 4 can be lifted and lowered, and the lower end is directly above the discharge pipe 2.
垂する手段がパイプ４の上端部に装着したバネ抑え６お
よびホッパーの蓋３に載せたコイルバネ５である、請求
項１に記載の粉末成形機のホッパー。2. The powder according to claim 1, wherein the means for suspending the pipe 4 in the hopper 1 so as to be able to move up and down are a spring retainer 6 attached to the upper end of the pipe 4 and a coil spring 5 mounted on the lid 3 of the hopper. Molding machine hopper.
その内面に滑合して所定の範囲で昇降可能なスライダー
９がパイプ４の上端に離接可能に載っている請求項１ま
たは請求項２に記載の粉末成形機のホッパー。3. The upper end of the pipe 4 is surrounded by a guide cylinder 7,
The hopper of a powder molding machine according to claim 1 or 2, wherein a slider 9 that slides on the inner surface of the pipe 9 and can move up and down within a predetermined range is mounted on the upper end of the pipe 4 so as to be separable from and in contact with the slider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11491796A JP3352590B2 (en) | 1996-05-09 | 1996-05-09 | Powder molding machine hopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11491796A JP3352590B2 (en) | 1996-05-09 | 1996-05-09 | Powder molding machine hopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09301486A true JPH09301486A (en) | 1997-11-25 |
| JP3352590B2 JP3352590B2 (en) | 2002-12-03 |
Family
ID=14649870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11491796A Expired - Fee Related JP3352590B2 (en) | 1996-05-09 | 1996-05-09 | Powder molding machine hopper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3352590B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964086A (en) * | 2014-05-12 | 2014-08-06 | 张家港市贝尔机械有限公司 | Lifting type bridge breaking device |
| CN104670746A (en) * | 2013-11-27 | 2015-06-03 | 贵阳铝镁设计研究院有限公司 | Method for preventing stock bin from being blocked and stock bin |
| CN114768404A (en) * | 2022-06-20 | 2022-07-22 | 山东联投工具股份有限公司 | High-frequency shaking type explosion-proof bag-type dust collector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101813910B1 (en) * | 2017-09-06 | 2018-01-02 | 김인관 | Injection apparatus for chemical |
-
1996
- 1996-05-09 JP JP11491796A patent/JP3352590B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104670746A (en) * | 2013-11-27 | 2015-06-03 | 贵阳铝镁设计研究院有限公司 | Method for preventing stock bin from being blocked and stock bin |
| CN103964086A (en) * | 2014-05-12 | 2014-08-06 | 张家港市贝尔机械有限公司 | Lifting type bridge breaking device |
| CN114768404A (en) * | 2022-06-20 | 2022-07-22 | 山东联投工具股份有限公司 | High-frequency shaking type explosion-proof bag-type dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3352590B2 (en) | 2002-12-03 |
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