EP0608129A1 - Distributeur de liquide - Google Patents

Distributeur de liquide Download PDF

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Publication number
EP0608129A1
EP0608129A1 EP94300419A EP94300419A EP0608129A1 EP 0608129 A1 EP0608129 A1 EP 0608129A1 EP 94300419 A EP94300419 A EP 94300419A EP 94300419 A EP94300419 A EP 94300419A EP 0608129 A1 EP0608129 A1 EP 0608129A1
Authority
EP
European Patent Office
Prior art keywords
liquid
passageway
central passageway
dispensing
gun
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.)
Withdrawn
Application number
EP94300419A
Other languages
German (de)
English (en)
Inventor
Hideyo Fujii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nordson Corp
Original Assignee
Nordson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nordson Corp filed Critical Nordson Corp
Publication of EP0608129A1 publication Critical patent/EP0608129A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
    • B67D7/763—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators of air separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet

Definitions

  • This invention relates to a liquid dispenser for intermittently dispensing minute amounts of liquid.
  • the liquids used for such applications have a relatively high viscosity, and therefore a dispenser for delivering a precise amount of this type of liquid is operated intermittently.
  • liquid dispenser of this type can provide a high degree of accuracy and control over intermittent dispensing of minute amounts of liquid
  • dispensers are susceptible to the formation of gas bubbles in the liquid as it is supplied under pressure to the delivery apparatus, i.e. the gun.
  • a liquid dispenser in accordance with the invention comprises a gun body having a central passageway which extends therethrough and terminates at a nozzle opening at a first end of the body, means for supplying pressurized liquid to the central passageway, a plunger valve extending through the central passageway from a second end of the body, the plunger valve adapted to move axially along the passageway to open and close the passageway adjacent the nozzle opening, thereby to permit and to prevent, respectively, dispensing of liquid from the nozzle opening and means for moving the plunger located at the second end of the body wherein means are provided, located between the first and second ends of the body, for promoting removal of bubbles from the pressurized liquid while in the central passageway.
  • Such an arrangement substantially eliminates accuracy and control problems caused by the formation of air bubbles in an intermittently operated, liquid dispensing apparatus. This may be achieved via use of a gas collection chamber located in the gun which promotes removal of air bubbles from the pressurized liquid while in the gun, in combination with periodic operation of a venting valve to vent the gas collection chamber to remove the collected gas from the gun.
  • the central liquid passageway of a plunger valve dispensing gun may have an enlarged diameter portion, i.e. a gas collection chamber, opposite a nozzle end of the gun.
  • the plunger valve may also have an increased diameter within this portion. The increased surface area of the sides of the collection chamber and the valve promote passive removal of bubbles from the pressurized liquid while in the passageway.
  • the gun may also have an outlet in fluid communication with the gas collection chamber.
  • a venting valve may control fluid flow through the outlet. By opening the valve when the liquid in the passageway reaches a predetermined low level, collected gas can be removed from the chamber inside the gun. The valve is then closed, and the passageway is refilled until the liquid level reaches a predetermined upper level.
  • a transparent gun body or in the alternative, a transparent liquid gauge mounted to a non-transparent gun body and in fluid communication with the collection chamber, thereby to allow visual detection of the liquid level.
  • Dispensers in accordance with the invention passively promote removal of air bubbles from pressurized liquid in an intermittently operated dispenser, and also actively remove the collected gas from the gun, thereby eliminating accuracy and control problems that may result from the dispensing of liquid with gas bubbles entrapped therein.
  • the gas bubbles may be removed without interrupting normal dispensing operations.
  • the Figure shows a liquid dispenser 10 with bubble free capability, in accordance with the invention.
  • the dispenser 10 includes a dispensing gun 12 supplied with liquid under pressure via a tube 14 which terminates in a pressure vessel 16, sealed by a lid 17.
  • a valve 18 and a regulator 20 control pressurized air which is supplied to the vessel 16 by a pressure source 22.
  • the pressurized air forces the liquid out of vessel 16 through conduit 14 to gun 12, preferably through an in-line valve 24.
  • the dispensing gun 12 includes threadably connected body sections 26, 28, 30 and 32, and the sections 28 and 30 include a central passageway 34 through which the liquid under pressure moves toward section 32, which acts as an outlet nozzle for intermittent liquid dispensing.
  • the conduit 14 connects with central passageway 34 via an externally threaded connector section 36 which threads within body section 30.
  • the top of the dispensing gun 12 includes a solenoid 40, and the solenoid 40 connects to a plunger valve 42 which extends through the gun 12 along the passageway 34.
  • the plunger valve 42 controls liquid dispensing from the nozzle 32.
  • plunger value 42 When plunger value 42 is in a down position, as viewed in the Figure, a bottom end 44 thereof seats against a valve seat in the top of nozzle 32, thereby closing off the end of the passageway 34 and preventing discharge of liquid.
  • solenoid 40 raises plunger valve 42, the bottom end 44 unseats from nozzle 32, thereby causing liquid under pressure to discharge through nozzle 32.
  • this dispensing gun 12 promotes removal of bubbles from the liquid within the central passageway 34. This results from a combination of features, including an increased diameter upper portion 46 of central passageway 34, also referred to as a gas collection chamber. This increased diameter portion 46 provides increased surface area in the body 12, which facilitates the escape of entrapped gas or air bubbles from the liquid. Additionally, within chamber 46, the plunger valve 42 also has an increased diameter. This additional surface area also promotes bubble or gas removal from the dispensing liquid.
  • the invention also contemplates active removal of gas from the gun 12 during dispensing.
  • the dispensing gun 12 includes a lower liquid level sensor 48 and an upper liquid level sensor49 mounted to gun 12 in fluid communication with central passageway 34.
  • a normally closed exhaust valve 50 is opened by an electrical controller 58 to vent upper portion 46 via a fluid outlet 52.
  • central passageway 34 refills with liquid due to the pressure in vessel 16 until a desirable level is reached, i.e. the level of sensor 49.
  • Controller 58 electrically connected to both sensors 48 and 49, in response closes venting valve 50 and further flow into chamber 46 stops as the pressure in chamber 46 reaches approximately the pressure in vessel 16.
  • body section 28 be transparent, so that the liquid level may be visually detected.
  • a liquid level gauge 59 may be mounted alongside body section 28, with body section 28 having upper and lower ports (not shown) to place the inside of the gauge 59 in fluid communication with the central passageway 34. In this case, when air is to be manually removed from chamber 46, valve 50 is opened manually when the level of liquid in chamber46 is low, and once the liquid level in chamber 46 rises to the desired level in chamber 46, due to the pressure vessel 16, valve 50 is then manually closed.
  • the invention provides an open volume between solenoid 40 and nozzle outlet 32 to allow collection and eventual venting of gas from the gun 12, thereby eliminating the dispensing of bubbles from the nozzle section 32 and assuring that only liquid is dispensed. Also because of the manner of intermittent liquid dispensing via operation of the plunger valve 42, the dispensing gun 12 can be vented without stopping normal liquid dispensing operations.

Landscapes

  • Coating Apparatus (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
EP94300419A 1993-01-21 1994-01-20 Distributeur de liquide Withdrawn EP0608129A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4675/93U 1993-01-21
JP467593U JP2591745Y2 (ja) 1993-01-21 1993-01-21 液体吐出用ディスペンサ

Publications (1)

Publication Number Publication Date
EP0608129A1 true EP0608129A1 (fr) 1994-07-27

Family

ID=11590478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94300419A Withdrawn EP0608129A1 (fr) 1993-01-21 1994-01-20 Distributeur de liquide

Country Status (2)

Country Link
EP (1) EP0608129A1 (fr)
JP (1) JP2591745Y2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0869554A2 (fr) * 1997-03-31 1998-10-07 Nordson Corporation Pompe de distribution pour l'encapsulation par une résine époxy de circuits intégrés
EP1987890A1 (fr) * 2006-02-21 2008-11-05 MUSASHI ENGINEERING, Inc. Dispositif de distribution de liquide comprenant un mécanisme d'élimination des bulles
CN107971182A (zh) * 2017-12-20 2018-05-01 天台县梅铁机械有限公司 自动涂胶机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7735695B2 (en) * 2001-10-17 2010-06-15 Musashi Engineering, Inc. Liquid material delivering method and device therefor
JP4036431B2 (ja) * 2001-10-25 2008-01-23 武蔵エンジニアリング株式会社 液材の吐出方法およびその装置
JP5234709B2 (ja) * 2006-09-29 2013-07-10 株式会社アルバック 液剤滴下装置及び液剤滴下装置の脱泡処理方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270207A1 (fr) * 1986-09-05 1988-06-08 W.R. Grace & Co. Etanchéité
DE3841474A1 (de) * 1988-12-09 1990-06-13 Macon Gmbh Klebstoff Auftragsg Ventil zur zeitgesteuerten abgabe von fluessigem bis gelartigem medium
EP0375462A2 (fr) * 1988-12-23 1990-06-27 Nordson Corporation Appareil pour distribuer des petites quantités de liquide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270207A1 (fr) * 1986-09-05 1988-06-08 W.R. Grace & Co. Etanchéité
DE3841474A1 (de) * 1988-12-09 1990-06-13 Macon Gmbh Klebstoff Auftragsg Ventil zur zeitgesteuerten abgabe von fluessigem bis gelartigem medium
EP0375462A2 (fr) * 1988-12-23 1990-06-27 Nordson Corporation Appareil pour distribuer des petites quantités de liquide

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0869554A2 (fr) * 1997-03-31 1998-10-07 Nordson Corporation Pompe de distribution pour l'encapsulation par une résine époxy de circuits intégrés
US5927560A (en) * 1997-03-31 1999-07-27 Nordson Corporation Dispensing pump for epoxy encapsulation of integrated circuits
US5992688A (en) * 1997-03-31 1999-11-30 Nordson Corporation Dispensing method for epoxy encapsulation of integrated circuits
EP0869554A3 (fr) * 1997-03-31 2000-03-08 Nordson Corporation Pompe de distribution pour l'encapsulation par une résine époxy de circuits intégrés
EP1987890A1 (fr) * 2006-02-21 2008-11-05 MUSASHI ENGINEERING, Inc. Dispositif de distribution de liquide comprenant un mécanisme d'élimination des bulles
EP1987890A4 (fr) * 2006-02-21 2009-12-09 Musashi Engineering Inc Dispositif de distribution de liquide comprenant un mécanisme d'élimination des bulles
US8397955B2 (en) 2006-02-21 2013-03-19 Musashi Engineering, Inc. Liquid material discharge device with debubbling mechanism
CN107971182A (zh) * 2017-12-20 2018-05-01 天台县梅铁机械有限公司 自动涂胶机
CN107971182B (zh) * 2017-12-20 2020-07-10 青岛华翔汽车顶棚系统有限公司 自动涂胶机

Also Published As

Publication number Publication date
JP2591745Y2 (ja) 1999-03-10
JPH0657461U (ja) 1994-08-09

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