CN1466492A - 低压静电带电 - Google Patents

低压静电带电 Download PDF

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Publication number
CN1466492A
CN1466492A CNA018166210A CN01816621A CN1466492A CN 1466492 A CN1466492 A CN 1466492A CN A018166210 A CNA018166210 A CN A018166210A CN 01816621 A CN01816621 A CN 01816621A CN 1466492 A CN1466492 A CN 1466492A
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CN
China
Prior art keywords
gun
electrode
electrostatic
earth electrode
valve
Prior art date
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Granted
Application number
CNA018166210A
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English (en)
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CN1222367C (zh
Inventor
罗伯特・林德
罗伯特·林德
・奥尔森
斯科特·奥尔森
・卡斯顿
查尔斯·卡斯顿
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Graco Minnesota Inc
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Graco Minnesota Inc
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Publication date
Application filed by Graco Minnesota Inc filed Critical Graco Minnesota Inc
Publication of CN1466492A publication Critical patent/CN1466492A/zh
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Publication of CN1222367C publication Critical patent/CN1222367C/zh
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
    • B05B5/0535—Electrodes specially adapted therefor; Arrangements of electrodes at least two electrodes having different potentials being held on the discharge apparatus, one of them being a charging electrode of the corona type located in the spray or close to it, and another being of the non-corona type located outside of the path for the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Abstract

一种用于增加喷涂的转换效率的静电方法，利用了静电喷涂中通常不需要和使用的低电压。气嘴(18)后面的接地电极(16)的位置和结构有助于保证清洁的操作。

Description

低压静电带电
技术领域
本申请是2000年9月29日申请的序列号为60/237006的美国专利申请的部分继续申请。
背景技术
静电喷枪为人所熟知，其中包括Graco Inc.公司以PROGUNTM商标销售的静电喷枪。这些喷枪利用自含式空气涡轮交流发电机组合以及倍增器来产生35kV以上的电压。
发明内容
在本发明中，带电电极被引入与标准静电喷枪相似的雾化位置或其附近。如美国专利5647543所描述的，接地电极被设置在与高压电极足够接近的位置，以便在带有10-20kV的电荷时产生非常高的场强并在高压电极的端部产生电晕放电区。
已经发现，这样的接地电极的最佳位置是在离气嘴的表面约1.5英寸的枪体侧面，并且采用约20kV的电压。当接地电极被置于靠近所述气嘴的任何位置(如在前述专利中示出的那样)，转换效率和带电可以很高，但涂料会很快在接地电极上累积。这是因为，雾化过程在紧靠通常的喷涂罩外面产生大量的杂散颗粒，并且在进行带电时这些颗粒会被吸到靠近气嘴的任何接地。通过将接地电极沿着枪体向后移动一小段距离，它们距离杂散颗粒足够远，以保持清洁的操作。如果接地电极被向后移动过远，则需要更高的电压来在带电电极处产生必须的场强。
这样的喷枪比非静电喷枪改善了转换效率，并消除了对于其它低压静电结构来说常见的涂料累积。这样的低压枪比常规的较高电压的枪可制造得更小、更轻并且成本更低。与较高电压的喷涂方法相比，本发明在为雾化的颗粒提供电荷的同时，具有较少的引起其它物体带电增加到不安全水平的杂散离子。操作位置的较低场强意味着与常规的静电枪相比具有较低的电压感觉，并且有较少的涂料向后粘到操作者上，从而使操作者更舒适地操作。
在这样的结构下，接地电极的尺寸和位置并不重要，不会影响喷涂操作。因为接地路径不需要通过气嘴或气嘴环，因此结构比较简单。
从下面结合附图的说明容易更全面地了解本发明的这些和其它目的及优点，其中在各图中相似的符号表示相同或相似的部分。
附图简要说明
图1示出本发明的透视图，表示从不导电的枪筒延伸出的接地电极。
具体实施方式
在图1中总体上以10表示的本发明包括传统的导电接地枪柄12，其前部连接到不导电的枪筒14。接地电极16被模制在枪筒14内，并具有从两侧延伸出的尖端16a。图1只示出一个这样的电极16，但在枪的另一侧具有一个这样的电极的镜像。在该优选实施例中，这样的电极延伸了约0.160英寸，并具有0.090英寸的直径。该电极延伸通过枪筒，以在安装位置与枪柄接触。如前所述，电极尖端16a位于雾化位置气嘴18后面约1.5英寸。
可以认为，在不脱离后附权利要求书确定的构思和范围情况下，可以对所述静电喷枪做出各种改变和改进。

Claims (3)

1.在一种静电喷枪中，具有导电接地枪柄和连接到枪柄上的不导电枪筒，在枪筒端部具有气嘴和带电电极，所述气嘴具有前端和后端，所述改进包括：至少一个接地电极从所述气嘴后面的所述枪筒向外延伸的。
2.如权利要求1所述的静电喷枪，其中所述接地电极设于所述气嘴前端的后面约1.5英寸。
3.如权利要求1所述的静电喷枪，包括至少两个接地电极，所述接地电极设于所述枪筒的相对侧。
CNB018166210A 2000-09-29 2001-09-28 一种静电喷枪 Expired - Lifetime CN1222367C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23700600P 2000-09-29 2000-09-29
US60/237,006 2000-09-29

Publications (2)

Publication Number Publication Date
CN1466492A true CN1466492A (zh) 2004-01-07
CN1222367C CN1222367C (zh) 2005-10-12

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CNB018166210A Expired - Lifetime CN1222367C (zh) 2000-09-29 2001-09-28 一种静电喷枪

Country Status (7)

Country Link
US (1) US6758424B2 (zh)
EP (1) EP1328350B1 (zh)
JP (1) JP4989014B2 (zh)
CN (1) CN1222367C (zh)
AU (1) AU2001296937A1 (zh)
DE (1) DE60128715T2 (zh)
WO (1) WO2002026390A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100460084C (zh) * 2004-08-11 2009-02-11 阿耐斯特岩田株式会社 静电喷涂用喷漆枪以及静电喷涂方法
CN104245148A (zh) * 2012-03-06 2014-12-24 旭灿纳克株式会社 静电涂装用的喷涂装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5513061B2 (ja) * 2009-10-09 2014-06-04 旭サナック株式会社 静電塗装システム、および、静電塗装用スプレーガン
WO2014055429A1 (en) * 2012-10-01 2014-04-10 Graco Minnesota, Inc. Grounding rods for electrostatic spray gun
JP6751074B2 (ja) * 2014-04-04 2020-09-02 グラコ ミネソタ インコーポレーテッド 帯電用外部端子を有する静電噴霧用スプレーガン
US10926275B1 (en) 2020-06-25 2021-02-23 Graco Minnesota Inc. Electrostatic handheld sprayer

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* Cited by examiner, † Cited by third party
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CN100460084C (zh) * 2004-08-11 2009-02-11 阿耐斯特岩田株式会社 静电喷涂用喷漆枪以及静电喷涂方法
CN104245148A (zh) * 2012-03-06 2014-12-24 旭灿纳克株式会社 静电涂装用的喷涂装置
CN104245148B (zh) * 2012-03-06 2016-08-17 旭灿纳克株式会社 静电涂装用的喷涂装置

Also Published As

Publication number Publication date
WO2002026390A1 (en) 2002-04-04
US20030178513A1 (en) 2003-09-25
EP1328350A4 (en) 2006-08-30
CN1222367C (zh) 2005-10-12
DE60128715T2 (de) 2007-10-25
AU2001296937A1 (en) 2002-04-08
EP1328350B1 (en) 2007-05-30
JP4989014B2 (ja) 2012-08-01
US6758424B2 (en) 2004-07-06
DE60128715D1 (de) 2007-07-12
EP1328350A1 (en) 2003-07-23
JP2004509742A (ja) 2004-04-02

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Granted publication date: 20051012