JP4282057B2 - Liquid material discharge device - Google Patents

Liquid material discharge device Download PDF

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Publication number
JP4282057B2
JP4282057B2 JP2002327613A JP2002327613A JP4282057B2 JP 4282057 B2 JP4282057 B2 JP 4282057B2 JP 2002327613 A JP2002327613 A JP 2002327613A JP 2002327613 A JP2002327613 A JP 2002327613A JP 4282057 B2 JP4282057 B2 JP 4282057B2
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Prior art keywords
liquid material
plunger
discharge
valve
rod
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JP2002327613A
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Japanese (ja)
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JP2004160314A (en
Inventor
和正 生島
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Musashi Engineering Inc
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Musashi Engineering Inc
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Description

【0001】
【産業の属する技術分野】
本発明は、液材を滴下または飛滴させて吐出する技術分野に関し、液材の性質を良好な状態に保ち、かつ効率良く吐出する技術に関する。
【0002】
【従来の技術】
液材を飛滴する技術としては、液材を貯留する液材貯留部と、液材を吐出するノズル部と、前記貯留部と前記ノズル部とを連通する液送路と、前記液送路の内面に密着して摺動するシール部を有するプランジャー部と、前記プランジャー部を進退移動するプランジャー移動手段と、で構成され、液送路のノズル側末端近傍と液送路の液材貯留部近傍または液材貯留部とを連通する液送路2と前記液送路2の液送路末端、または液送路2途中に配設された液送弁と、を具える装置を本出願人が特願2001−328313号(本願の出願後、特開2003−126750号公報が発行)にて既に提案している。
【0003】
【特許文献1】
特開2002−282740号公報
【0004】
【発明が解決しようとする課題】
上記先願の発明は、所期の目的は達成できたが、さらなる作業効率化を求め、次のような改善点を見出した。
先願装置は、吐出装置本体に液材を貯留する貯留容器を有しており、計量管内の液材が消費されると貯留容器内の液材が順次計量管へ送出されるので、貯留容器内の液材表面は長時間空気に接触することとなり、先願装置においては、吸湿性の高い液材や空気接触により変性する液材を使用することが難しかった。
【0005】
また、貯留容器内の液材を消費した後には、連続運転している吐出作業においても一時的に中断させて前記貯留容器内に液材を補充することが必要であり、これが生産効率を落とす原因となっていた。
本発明は、かかる問題を解決し、高効率な吐出作業を行う装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
液材が供給される液材供給口と、液材を吐出する吐出口と、液材供給口と吐出口とを連通する計量管と、計量管の内面に密着して摺動するプランジャーを有するプランジャー部と、前記プランジャー進退移動するプランジャー移動手段と、前記計量管と前記吐出口とを連通する開位置と、前記計量管と前記吐出口とを遮断する閉位置とを有する吐出バルブと、吐出バルブ駆動手段とを含んで構成され、前記プランジャー部は、前記液材供給口と前記計量管とを連通する流路と、当該流路内を進退移動して液材供給口と計量管と連通または遮断するバルブロッドと、バルブロッド駆動手段とを有することを特徴とする液材の吐出装置である。
本装置においては、液材が供給される液材供給口から液材が吐出される吐出口までの間に、液材が変性原因となる空気に触れることが無いから、ピュアな状態の液材を吐出することができ、機能性液材においては期待される効果を得ることができる。
また、液材は、プランジャーの内部および計量管を経て計量管に供給されるから、液材貯留容器を不要とし、従って液材補充のための作業を不要とし、効率の良い作業を行うことができる。
【0007】
また、プランジャーと吐出口とを連通するまたは閉止する吐出バルブ計量管の末端または計量管途中に配設することにより、吐出口から液材が液だれすることを防止し、かつ計量管への液材充填において作業を円滑にして好ましい。
さらに、プランジャーの進出移動時においてプランジャーにより加圧される流路は、流路内径を最大径、吐出口径を最小径とし、かつ、その間の流路は吐出口側が常に小径または同径となるように構成することが、プランジャーの前進移動による液材加圧力を効率よく伝達し、適正な液材の飛滴流速を得ることができて好ましい。
【0008】
ここで、前記プランジャー、前記液材供給口と連通する管状部を有するプランジャーロッドと、プランジャーロッドの先端に装着され、前記バルブロッドが密着または離間する孔を有し、外壁に計量管内壁面と密着するシール部を有する、プランジャーヘッドとプランジャーロッドの管状部に挿入されるバルブロッドとを含んで構成することができる。
【0009】
【発明の実施の形態】
本発明の詳細を発明の実施の形態に基づき説明するが、本発明はこの実施の形態によって何ら限定されるものではない。
【0010】
≪全体構造≫
本発明の液材吐出装置は、液材を吐出するポンプ部と、液材を計量室に供給すると共に液材に慣性力を付与するプランジャー部と、それらを支持する枠体とで構成されている。
以下各部の詳細を説明する。
【0011】
≪枠体≫
図1が示すように枠体1は、プラジャー支持体5を上下方向に案内する案内ロッドと、枠体1の下部に設けたモータ2により回転されプラジャー支持体5を上下方向に移動させるネジ軸とを支持する上部枠体と、吐出バルブ3と吐出バルブ3を介して計量管4を支持する下部枠体とで構成されている。
【0012】
≪ポンプ部≫
管状部材で形成された計量管4内には、プラジャー支持体5の上下動により、計量管4の内面に密接した状態で上下動するプランジャー部10が配設されており、前記計量管4の先端は吐出バルブ3が配設され、前記吐出バルブ3の他端は、先端に吐出口7を有するノズル6が配設されている。ここで、吐出バルブ3の弁体に設けた流路の内径を前記計量管4の内径とほぼ等しいまたは小径となるよう構成し、吐出バルブ3が開位置においては、液材が計量管4から吐出バルブ3へ円滑に流動するように構成する。
なお、この実施例では、吐出バルブ3は、前記計量管4とノズル6とを連通する開位置と閉止する閉位置との二位置を取るロータリバルブを採用したが、流路の径が計量管4の内径と等しいまたは小径であれば、スライドバルブを用いても良い。
【0013】
≪プランジャー部≫
プランジャー部10は、管状部を有するプランジャーロッド11と、前記プランジャーロッドの先端に装着され、前記プランジャーロッドの管状部と連通する孔16を有し、外壁に前記計量管4の内壁面と密着するシール部を有するプランジャーヘッド12と、前記プランジャーロッド11の管状部に挿入されるバルブロッド13と、図示しない貯留容器から液材が供給される液材供給口15を有し、かつ前記バルブロッド13により前記プランジャーヘッド12の孔16を開放または閉止させるバルブロッド駆動手段14としてのエアシリンダ14とで構成されているバルブ機構を備えている。
なお、本実施例のプランジャー部10における流路は、液材供給口15からプランジャーロッド11の内部およびプランジャーヘッド12の孔16を介して計量管4に連通するよう構成されている。
【0014】
≪液材吐出作業≫
次に、上記構成の液材吐出装置を用いた液材吐出作業を説明する。
液材が全く計量管4に導入されていない状態においては、
吐出バルブ3を開放し、モータ2を作動させてプランジャー部10のプランジャーヘッド12を前記吐出バルブ3直近の位置まで前進移動させる。これにより計量管4に充填されていた空気はノズル6より放出される。
次に、吐出バルブ3を閉止し、バルブロッド駆動手段14(エアシリンダ)を作動させてバルブロッド13とプランジャーヘッド12を離間させた後、モータ2を作動させてプランジャー部10のプランジャーヘッド12を後退移動させ、図示しない貯留容器から液材供給口15からプランジャーロッド11の内部およびプランジャーヘッド12を通じて計量管4に充填させる。
【0015】
さらに、プランジャーヘッド12を進出移動させて先端を液材に密接させた後、バルブロッド駆動手段14(エアシリンダ)を作動させてバルブロッド13とプランジャーヘッド12を当接させて、プランジャーロッド11内部の流路と計量管4との連通を遮断する。
これにより、計量管4内部に残留していた気泡は、計量管4からプランジャーロッド11内部の流路に隔離される。
【0016】
次に、吐出バルブ3を開放し、モータ2を作動させてプランジャーを規定量だけ急速前進および急速停止させて、計量管4内の液材に慣性力を与えてノズル6先端の吐出口7より液滴として吐出させる。
また、プランジャーの急速前進および急速停止を繰り返して行い、連続的に液滴を吐出することもできる。
【0017】
ここで、計量管4から吐出口7に至る流路は、常に吐出口7に向かって小径となっているので、計量管4から吐出口7に向かう液材の流速は、計量管4から吐出口7に向かって高速となり、ノズル6先端の吐出口7においては飛滴するのに十分な液材の流速を得ることができる。
また、このような吐出作業の繰り返しにおいては、プランジャー13の動作が吐出毎に均一となるよう、プランジャー13の先端位置を、常に一定した位置から後退動作し、一定した位置から進出動作させ、毎回計量管4に充填して使用することも可能である。
【0018】
【発明の効果】
このように本発明は、液材が液材供給口から加圧するプランジャー内部を通って計量管に供給される構成により、液材が装置内において空気接触することなくノズル先端から吐出されるので、液材の変性を効果的に防止しピュアな液材を吐出することができる。また、貯留容器の無い構成により貯留容器を有した装置と比して吐出作業の中断を伴う液材補充作業を排除して、効率の良い吐出作業を行うことができる。
【図面の簡単な説明】
【図1】要部を破断図示した液材吐出装置の概略図である。
【符号の説明】
1 枠体
2 モータ
3 吐出バルブ(ロータリバルブ)
4 計量管
5 プランジャー支持体
6 ノズル
7 吐出口
10 プランジャー部
11 プランジャーロッド
12 プランジャーヘッド
13 バルブロッド
14 バルブロッド駆動手段(エアシリンダ)
15 液材供給口
16 孔
[0001]
[Technical field to which industry belongs]
The present invention relates to a technical field in which a liquid material is ejected by dropping or flying, and relates to a technique for efficiently ejecting a liquid material while maintaining the properties of the liquid material in a good state.
[0002]
[Prior art]
As a technique for flying the liquid material, a liquid material storage part that stores the liquid material, a nozzle part that discharges the liquid material, a liquid feed path that communicates the storage part and the nozzle part, and the liquid feed path A plunger portion having a seal portion that is in close contact with and sliding on the inner surface, and a plunger moving means for moving the plunger portion back and forth, and in the vicinity of the nozzle side end of the liquid feed path and the liquid in the liquid feed path An apparatus comprising: a liquid feed path 2 that communicates with the vicinity of the material storage section or the liquid material storage section; and a liquid feed end of the liquid feed path 2 or a liquid feed valve disposed in the middle of the liquid feed path 2 This applicant has already proposed in Japanese Patent Application No. 2001-328313 (issued by Japanese Patent Application Laid-Open No. 2003-126750 after the application of this application) .
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-282740
[Problems to be solved by the invention]
The invention of the above-mentioned prior application has achieved the intended purpose, but has sought further work efficiency and has found the following improvements.
The prior application device has a storage container for storing the liquid material in the discharge device main body, and when the liquid material in the measuring tube is consumed, the liquid material in the storage container is sequentially sent to the measuring tube. The surface of the liquid material is in contact with air for a long time, and it has been difficult to use a highly hygroscopic liquid material or a liquid material that is denatured by air contact in the prior application apparatus.
[0005]
In addition, after the liquid material in the storage container is consumed, it is necessary to temporarily interrupt the continuous discharge operation to replenish the storage material with the liquid material, which reduces the production efficiency. It was the cause.
It is an object of the present invention to provide an apparatus that solves such problems and performs highly efficient discharge work.
[0006]
[Means for Solving the Problems]
A liquid material supply port through which the liquid material is supplied, a discharge port for discharging the liquid material, a measuring tube communicating with the liquid material supply port and the discharge port, and a plunger that slides in close contact with the inner surface of the measuring tube And a plunger moving means for moving the plunger forward and backward, an open position for communicating the measuring tube and the discharge port, and a closed position for blocking the measuring tube and the discharge port. The plunger portion includes a discharge valve and a discharge valve driving means, and the plunger portion supplies a liquid material by moving back and forth in the flow path and a flow path communicating the liquid material supply port and the measuring pipe. a valve rod for communicating or blocking the mouth and the metering tube, a discharge apparatus of a liquid material and having a valve rod drive unit.
In this device, since the liquid material does not touch the air that causes the modification between the liquid material supply port through which the liquid material is supplied and the discharge port through which the liquid material is discharged, the liquid material in a pure state Can be discharged, and the expected effect can be obtained in the functional liquid material.
In addition, since the liquid material is supplied to the measuring tube through the plunger and the measuring tube, the liquid material storage container is not required, and therefore, the work for replenishing the liquid material is not required, and an efficient operation is performed. Can do.
[0007]
Also, by disposing a discharge valve that connects or closes the plunger and discharge port at the end of the measuring tube or in the middle of the measuring tube, the liquid material is prevented from leaking from the discharge port, and to the measuring tube. In the filling of the liquid material, the work is preferably smoothed.
Furthermore, the flow path pressurized by the plunger when the plunger moves forward has a maximum flow path inner diameter and a minimum discharge port diameter, and the flow path between them always has a small diameter or the same diameter on the discharge port side. It is preferable to be configured so that the liquid material pressurizing force due to the forward movement of the plunger can be efficiently transmitted and an appropriate droplet flow velocity of the liquid material can be obtained.
[0008]
Wherein said plunger includes a plunger rod having the liquid material supply port and the tubular portion communicating with, is mounted on the distal end of the plunger rod has a hole through which the valve rod is in close contact or separated, weighed to the outer wall having a seal portion for contact with the pipe wall, it may be configured to include a plunger head, and a valve rod which is inserted into the tubular portion of the plunger rod.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The details of the present invention will be described based on an embodiment of the invention, but the present invention is not limited to the embodiment.
[0010]
≪Overall structure≫
The liquid material discharge device of the present invention includes a pump unit that discharges the liquid material, a plunger unit that supplies the liquid material to the measuring chamber and applies inertial force to the liquid material, and a frame that supports them. ing.
Details of each part will be described below.
[0011]
≪Frame body≫
As shown in FIG. 1, the frame body 1 is a screw shaft that is rotated by a guide rod that guides the plunger support body 5 in the vertical direction and a motor 2 provided in the lower part of the frame body 1 to move the plunger support body 5 in the vertical direction. And a lower frame that supports the measuring pipe 4 via the discharge valve 3.
[0012]
≪Pump part≫
In the measuring tube 4 formed of a tubular member, a plunger portion 10 that moves up and down in close contact with the inner surface of the measuring tube 4 by the vertical movement of the plunger support 5 is disposed. A discharge valve 3 is disposed at the tip of the nozzle, and a nozzle 6 having a discharge port 7 is disposed at the other end of the discharge valve 3. Here, the inner diameter of the flow path provided in the valve body of the discharge valve 3 is configured to be substantially equal to or smaller than the inner diameter of the measuring tube 4, and when the discharge valve 3 is in the open position, the liquid material is removed from the measuring tube 4. It is configured to smoothly flow to the discharge valve 3.
In this embodiment, the discharge valve 3 employs a rotary valve that takes two positions, an open position where the metering tube 4 and the nozzle 6 communicate with each other, and a closed position where the metering tube 4 and the nozzle 6 are closed. If it is equal to or smaller than the inner diameter of 4, a slide valve may be used.
[0013]
≪Plunger part≫
The plunger portion 10 has a plunger rod 11 having a tubular portion, a hole 16 attached to the distal end of the plunger rod, communicating with the tubular portion of the plunger rod, and an inner wall of the measuring tube 4 on the outer wall. It has a plunger head 12 having a seal portion that is in close contact with the wall surface, a valve rod 13 that is inserted into the tubular portion of the plunger rod 11, and a liquid material supply port 15 through which a liquid material is supplied from a storage container (not shown). And a valve mechanism comprising an air cylinder 14 as valve rod driving means 14 for opening or closing the hole 16 of the plunger head 12 by the valve rod 13.
The flow path in the plunger portion 10 of this embodiment is configured to communicate with the measuring tube 4 from the liquid material supply port 15 through the inside of the plunger rod 11 and the hole 16 of the plunger head 12.
[0014]
≪Liquid material discharge work≫
Next, a liquid material discharge operation using the liquid material discharge apparatus having the above configuration will be described.
In a state where no liquid material is introduced into the measuring tube 4,
The discharge valve 3 is opened, the motor 2 is operated, and the plunger head 12 of the plunger portion 10 is moved forward to a position closest to the discharge valve 3. Thereby, the air filled in the measuring tube 4 is discharged from the nozzle 6.
Next, the discharge valve 3 is closed, the valve rod driving means 14 (air cylinder) is operated to separate the valve rod 13 and the plunger head 12, and then the motor 2 is operated to move the plunger of the plunger unit 10. The head 12 is moved backward, and the measuring tube 4 is filled from the storage container (not shown) through the liquid material supply port 15 through the plunger rod 11 and the plunger head 12.
[0015]
Further, after the plunger head 12 is moved forward and brought into close contact with the liquid material, the valve rod driving means 14 (air cylinder) is operated to bring the valve rod 13 and the plunger head 12 into contact with each other. The communication between the flow path inside the rod 11 and the measuring tube 4 is blocked.
Thereby, the bubbles remaining in the measuring tube 4 are isolated from the measuring tube 4 into the flow path inside the plunger rod 11.
[0016]
Next, the discharge valve 3 is opened, the motor 2 is operated, the plunger is rapidly advanced and stopped by a specified amount, and an inertial force is applied to the liquid material in the measuring tube 4 to discharge the discharge port 7 at the tip of the nozzle 6. More liquid droplets are discharged.
Moreover, it is also possible to discharge droplets continuously by repeating rapid advance and rapid stop of the plunger.
[0017]
Here, since the flow path from the measuring tube 4 to the discharge port 7 always has a small diameter toward the discharge port 7, the flow rate of the liquid material from the measuring tube 4 to the discharge port 7 is discharged from the measuring tube 4. The flow rate becomes higher toward the outlet 7, and a flow rate of the liquid material sufficient for flying droplets can be obtained at the discharge port 7 at the tip of the nozzle 6.
Further, in the repetition of such a discharge operation, the distal end position of the plunger 13 is always moved backward from the fixed position and moved forward from the fixed position so that the operation of the plunger 13 becomes uniform for each discharge. It is also possible to fill the measuring tube 4 every time.
[0018]
【The invention's effect】
As described above, according to the present invention, since the liquid material is supplied to the measuring tube through the plunger pressurized from the liquid material supply port, the liquid material is discharged from the tip of the nozzle without contacting the air in the apparatus. The liquid material can be effectively prevented from being denatured and a pure liquid material can be discharged. Further, as compared with an apparatus having a storage container due to the configuration without a storage container, the liquid material replenishment work that interrupts the discharge work can be eliminated, and an efficient discharge work can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic view of a liquid material discharge device with a major part broken away.
[Explanation of symbols]
1 Frame 2 Motor 3 Discharge valve (rotary valve)
4 Metering Tube 5 Plunger Support 6 Nozzle 7 Discharge Port 10 Plunger Part 11 Plunger Rod 12 Plunger Head 13 Valve Rod 14 Valve Rod Driving Means (Air Cylinder)
15 Liquid material supply port 16 holes

Claims (5)

液材が供給される液材供給口と、
液材を吐出する吐出口と、
液材供給口と吐出口とを連通する計量管と、
計量管の内面に密着して摺動するプランジャーを有するプランジャー部と、
前記プランジャー進退移動するプランジャー移動手段と
前記計量管と前記吐出口とを連通する開位置と、前記計量管と前記吐出口とを遮断する閉位置とを有する吐出バルブと、吐出バルブ駆動手段とを含んで構成され、
前記プランジャー部は、前記液材供給口と前記計量管とを連通する流路と、当該流路内を進退移動して液材供給口と計量管と連通または遮断するバルブロッドと、バルブロッド駆動手段とを有することを特徴とする液材の吐出装置。
A liquid material supply port through which the liquid material is supplied;
A discharge port for discharging the liquid material;
A measuring tube communicating the liquid material supply port and the discharge port;
A plunger portion having a plunger that slides in close contact with the inner surface of the measuring tube;
Plunger moving means for moving the plunger forward and backward ;
A discharge valve having an open position for communicating the metering tube and the discharge port; a closed position for blocking the metering tube and the discharge port; and a discharge valve driving means .
The plunger includes a flow path that communicates the liquid material supply port and the metering pipe, a valve rod that moves forward and backward in the flow path to communicate or block the liquid material supply port and the metering pipe, and a valve. A liquid material discharge device comprising: a rod driving means .
前記プランジャー進出移動時においてプランジャーにより加圧される前記計量管から吐出口にかけての流路当該流路最大径を計量管の内径とし当該流路の最小径を吐出口径とし、かつ、当該流路吐出口側が計量管側に比べて常に小径または同径となるように構成することを特徴とする請求項記載の液材の吐出装置。 The flow path toward the discharge port from the metering tube is pressurized by a plunger during the advancing movement of the plunger, the maximum diameter of the flow path and the inner diameter of the measuring tube, and a discharge diameter of the smallest diameter of the passage and the liquid material discharge device according to claim 1, wherein the discharge port side of the flow path, characterized in that configured to always a smaller diameter or same diameter compared to the metering tube side. 前記プランジャー、前記液材供給口と連通する管状部を有するプランジャーロッドと、プランジャーロッドの先端に装着され、前記バルブロッドが密着または離間する孔を有し、外壁に計量管内壁面と密着するシール部を有する、プランジャーヘッドとプランジャーロッドの管状部に挿入されるバルブロッドとを含んで構成されることを特徴とする請求項1または2記載の液材の吐出装置。It said plunger includes a plunger rod having a tubular portion communicating with the liquid material supply port, is attached to the distal end of the plunger rod has a hole through which the valve rod is in close contact with or separated from, the metering tube wall to the outer wall having a seal portion in close contact, and the plunger head, ejecting apparatus according to claim 1 or 2, wherein the liquid material characterized in that it is configured to include a valve rod which is inserted into the tubular portion of the plunger rod. 前記吐出バルブが、ロータリバルブまたはスライドバルブであることを特徴とする請求項1ないし3のいずれか一項に記載の液材の吐出装置。The liquid material discharge device according to any one of claims 1 to 3, wherein the discharge valve is a rotary valve or a slide valve. 前記液材供給口が、前記プランジャー部の上方部分に配置され、かつ、外部の液材貯留容器と接続されることを特徴とする請求項1ないし4のいずれか一項に記載の液材の吐出装置。5. The liquid material according to claim 1, wherein the liquid material supply port is disposed in an upper portion of the plunger portion and is connected to an external liquid material storage container. Discharge device.
JP2002327613A 2002-11-11 2002-11-11 Liquid material discharge device Expired - Lifetime JP4282057B2 (en)

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