CN105457858A - 阀门铸件的静电粉末喷塑方法 - Google Patents

阀门铸件的静电粉末喷塑方法 Download PDF

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CN105457858A
CN105457858A CN201610015931.8A CN201610015931A CN105457858A CN 105457858 A CN105457858 A CN 105457858A CN 201610015931 A CN201610015931 A CN 201610015931A CN 105457858 A CN105457858 A CN 105457858A
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valve
foundry goods
valve foundry
spraying
afterwards
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常云青
李云坤
翟召武
代云冈
刘成林
常安
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QINGDAO HEDELONG MACHINERY CO Ltd
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QINGDAO HEDELONG MACHINERY CO Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/12—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0466—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas
    • B05D3/048—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

本发明公开了一种阀门铸件的静电粉末喷塑方法，经过表面处理、静电喷涂、工件固化对阀门铸件进行处理，阀门铸件表面喷塑处理之后，其光洁度有了很大的提高，不仅提高了阀体与包胶闸板相配合的密封面处密封的可靠性，而且还降低了闸板在启动过程中的摩擦力，从而减小了操作扭矩；相较于传统的喷漆涂层，不仅环保，而且喷塑层厚度厚，附着力强，不易脱落，抗磨损能力和耐水蚀性能都有了较大的提高。

Description

阀门铸件的静电粉末喷塑方法
技术领域
本发明属于铸件外表面喷塑工艺技术领域，具体涉及一种阀门铸件的外表面静电粉末喷塑方法。
背景技术
弹性闸板阀门铸件因其本身固有的特点，越来越被国内外众多用户所青睐，并被广泛应用于电力、石油、冶金等行业，随着科技的进步发展，人们的环保意识逐渐增强，对日常事物产品的外观也越来越重视，对原本表面粗糙的阀门产品也有了更高的要求，现有的阀门铸件的表面喷漆工艺已不能满足人们对环保以及铸件外观表面高质量的要求。
发明内容
为了克服现有技术领域存在的上述技术问题，本发明的目的在于，提供一种阀门铸件的静电粉末喷塑方法，方法简单，涂层均匀，光洁度高，防腐性能好。
本发明提供的阀门铸件的静电粉末喷塑方法，包括以下步骤：一、表面处理：（1）将阀门铸件拧上螺栓，之后采用规格为Φ0.8—Φ1mm的钢丸对阀门铸件表面进行喷丸处理，去除毛刺、夹砂、锈蚀、油污，喷丸处理之后对阀门铸件表面进行检测，确保外观完整，无缺陷；（2）对非加工表面进行细化处理，清除因打磨留下的痕迹和锈蚀，达到表面平滑；
二、静电喷涂：（1）将处理好的待喷涂阀门铸件加热至200—250℃，之后持续保温50-120min；（2）空压机放水，对保温处理之后的阀门铸件按照先上后下、先内腔后外表面的顺序进行喷涂，喷涂过程中喷枪距离阀门铸件15—25cm，气压0.4—0.6MPa，喷塑层厚度为0.5—0.6mm；
三、工件固化：将经过喷涂处理后的阀门铸件，采用远红外加热辅以热循环的方式在180—200℃温度条件下保温20—30min进行固化，之后采用风冷或者自然冷却的方式待阀门铸件冷却，卸掉螺栓，进行全面检测合格后装箱。
上述步骤二中，处理好的待喷涂阀门铸件加热至200—250℃，之后持续保温，保温时间根据工件大小、外界温、湿度调节，一般30kg以下的阀门铸件夏季保温时间为50min,冬季保温时间为80min，30—100kg的阀门铸件夏季保温时间为60min,冬季保温时间为120min。
本发明提供的阀门铸件的静电粉末喷塑方法，其有益效果在于，选用小规格的钢丸对阀门铸件进行表面处理，增加粉末与加工表面的附着力；静电喷涂之前空压机先放水，确保了喷涂用的压缩空气不含水份；阀门铸件加热至200—250℃，之后持续保温50-120min再进行喷涂，确保喷塑层的厚度、均匀度以及附着力；阀门铸件表面喷塑处理之后，其光洁度有了很大的提高，不仅提高了阀体与包胶闸板相配合的密封面处密封的可靠性，而且还降低了闸板在启动过程中的摩擦力，从而减小了操作扭矩；相较于传统的喷漆涂层，不仅环保，而且喷塑层厚度厚，附着力强，不易脱落，抗腐蚀，抗磨损能力和耐水蚀性能都有了较大的提高，延长了阀门的使用寿命，经试验，实验寿命可延长至少200h,耐水腐蚀的时间可延长1000h。
具体实施方式
下面结合一个实施例，对本发明提供的阀门铸件的静电粉末喷塑方法进行详细的说明。
实施例
本实施例的阀门铸件的静电粉末喷塑方法，包括以下步骤：一、表面处理：（1）将阀门铸件拧上螺栓，之后采用规格为Φ0.8mm的钢丸对阀门铸件表面进行喷丸处理，去除毛刺、夹砂、锈蚀、油污，喷丸处理之后对阀门铸件表面进行检测，确保外观完整，无缺陷；（2）对非加工表面进行细化处理，清除因打磨留下的痕迹和锈蚀，达到表面平滑；
二、静电喷涂：（1）将处理好的待喷涂阀门铸件加热至240℃，之后持续保温60min；（2）空压机使用之前先放水，之后再对保温处理之后的阀门铸件按照先上后下、先内腔后外表面的顺序进行喷涂，喷涂过程中喷枪距离阀门铸件20cm，气压0.5MPa，喷塑层厚度为0.6mm；
三、工件固化：将经过喷涂处理后的阀门铸件，采用远红外加热辅以热循环的方式在180温度条件下保温25min进行固化，之后待阀门铸件自然冷却，卸掉螺栓，进行全面检测合格后装箱。
阀门铸件的静电粉末喷塑方法，不需要额外的设备，生产成本低，方法简单可行，适用于工业批量生产，提高了阀门铸件的表面质量，由于其表面光洁，阀座对包胶产品的磨损大大降低，保证了产品的密封性能。

Claims (1)

1.一种阀门铸件的静电粉末喷塑方法，其特征在于包括以下步骤：
一、表面处理：（1）将阀门铸件拧上螺栓，之后采用规格为Φ0.8—Φ1mm的钢丸对阀门铸件表面进行喷丸处理，去除毛刺、夹砂、锈蚀、油污，喷丸处理之后对阀门铸件表面进行检测，确保外观完整，无缺陷；（2）对非加工表面进行细化处理，清除因打磨留下的痕迹和锈蚀，达到表面平滑；
二、静电喷涂：（1）将处理好的待喷涂阀门铸件加热至200—250℃，之后持续保温50-120min；（2）空压机放水，对保温处理之后的阀门铸件按照先上后下、先内腔后外表面的顺序进行喷涂，喷涂过程中喷枪距离阀门铸件15—25cm，气压0.4—0.6MPa，喷塑层厚度为0.5—0.6mm；
三、工件固化：将经过喷涂处理后的阀门铸件，采用远红外加热辅以热循环的方式在180—200℃温度条件下保温20—30min进行固化，之后采用风冷或者自然冷却的方式待阀门铸件冷却，卸掉螺栓，进行全面检测合格后装箱。
CN201610015931.8A 2016-01-12 2016-01-12 阀门铸件的静电粉末喷塑方法 Pending CN105457858A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107486381A (zh) * 2017-09-18 2017-12-19 江苏诚功阀门科技有限公司 阀门油漆施工工艺
CN114851685A (zh) * 2022-01-30 2022-08-05 上海神力科技有限公司 一种利用网版静电粉末喷涂对极板密封槽表面改性的方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107486381A (zh) * 2017-09-18 2017-12-19 江苏诚功阀门科技有限公司 阀门油漆施工工艺
CN114851685A (zh) * 2022-01-30 2022-08-05 上海神力科技有限公司 一种利用网版静电粉末喷涂对极板密封槽表面改性的方法

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