CN104689959A - 一种增强带散热槽的结构件防护能力的方法 - Google Patents
一种增强带散热槽的结构件防护能力的方法 Download PDFInfo
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- CN104689959A CN104689959A CN201510160255.9A CN201510160255A CN104689959A CN 104689959 A CN104689959 A CN 104689959A CN 201510160255 A CN201510160255 A CN 201510160255A CN 104689959 A CN104689959 A CN 104689959A
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- 238000005728 strengthening Methods 0.000 title abstract 2
- 238000000576 coating method Methods 0.000 claims abstract description 57
- 239000011248 coating agent Substances 0.000 claims abstract description 51
- 238000005488 sandblasting Methods 0.000 claims abstract description 37
- 238000005507 spraying Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000003973 paint Substances 0.000 claims description 37
- 239000007921 spray Substances 0.000 claims description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials 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Abstract
本发明公开了一种增强带散热槽的结构件防护能力的方法,属于机械加工领域。本发明是在常规喷涂工艺基础上,分别在散热槽内基材表面,底漆表面及弹性涂料表面增加三道喷砂工艺,对散热槽内涂层表面进行彻底打磨粗化,增强散热槽内基材与底漆、底漆与面漆涂层间的附着力,同时在喷涂面漆前增加喷涂弹性材料工序,加强喷砂过程中底漆涂层的耐冲击韧性,防止后续喷砂过程中底漆被冲击掉。本发明工艺方法可以增强散热槽内涂层间附着力,提高整个结构件产品的喷涂质量,防止产品在日后使用过程中出现涂层开裂起层等质量问题,加强产品的“三防”性能,提高产品生产质量的合格率。
Description
技术领域
[0001] 本发明属于机械加工领域,特别涉及通过增加喷砂及喷涂弹性涂料层工序来提高产品涂层附着力,加工质量及“三防”性能,具体为一种增强带散热槽的结构件防护能力的方法。
背景技术
[0002] 常规喷涂方法的工艺步骤为:去油一放置一烘干一保护一喷底漆一放置一喷底漆(加厚)一放置一烘干一找补刮腻子一干燥一打磨一去灰一喷面漆(头道)一放置一烘干—干燥一打磨一烘干一去灰一面漆(二道)一放置一烘干一自检一交验一清洁。
[0003] 结构件散热槽内在常规涂装过程中施工难度大,采用常规喷涂工艺无法在喷漆过程中彻底打磨散热槽内基材表面及喷漆涂层,造成涂层间附着力不强,涂层“三防”(防潮湿、放盐雾、防霉菌)性能差,存在严重隐患,产品在以后的使用过程中容易出现涂层间开裂起层等质量问题。
发明内容
[0004] 为了解决结构件产品散热槽内涂层附着力差的问题,防止产品在使用过程中出现涂层间开裂起层等质量问题。本发明在常规喷涂工艺方法基础上增加喷砂工序,使散热槽内基材及涂层得到充分粗化,增强喷漆后涂层间附着力强度,从而达到增强带散热槽的结构件防护能力的作用。同时在喷涂面漆前增加喷涂弹性材料工序,目的是增加喷砂过程中底漆涂层的耐冲击韧性,防治后续喷砂过程中底漆被冲击掉,提高散热槽内喷涂过程的高效高质量性。
[0005] 一种增强带散热槽的结构件防护能力的方法,其特征在于:采用喷砂的方法粗化涂层表面,在喷涂面漆前加喷一层弹性涂料,并再次采用喷砂的方法粗化弹性涂料表面。
[0006] 作为一种优选,所述涂层表面为散热槽内基材表面及散热槽内底漆表面。
[0007] 作为一种优选,所述喷砂材料为棕刚玉。
[0008] 作为一种优选,所述喷砂时间为10±2(s/dm2)。
[0009] 作为一种优选,对散热槽内基材表面喷砂所用棕刚玉大小为40目,对散热槽内底漆表面及弹性涂料表面喷砂所用棕刚玉大小为60目。
[0010] 作为一种优选,对散热槽内基材表面喷砂所用压力为(0.2〜0.4)MPa,对散热槽内底漆表面及弹性涂料表面喷砂所用压力为(0.2〜0.3)MPa„
[0011] 作为一种优选,所述弹性涂料为聚氨酯清漆。
[0012] 作为一种优选,喷涂弹性涂料的工艺参数为:
[0013] 喷涂粘度:(14〜20) s (涂4#杯)
[0014]喷涂压力:(0.3 〜0.5) Mpa
[0015]喷涂距离:(200 〜250) mm
[0016] 干膜厚度:(35〜45) μ m
[0017]烘干温度:(80 ±5) °C
[0018] 烘干时间:lh。
[0019] 将本发明所述喷砂工序及喷涂弹性涂料工序与常规喷涂工艺相结合,按照以下工序进行带散热槽结构件产品的喷涂生产:
[0020] 去油一放置一烘干一保护一打磨一基材喷砂一去灰一喷底漆一放置一烘干一刮腻子一烘干一打磨一底漆喷砂一去灰一喷底漆(加厚)一放置一烘干一找补刮腻子一喷涂弹性涂料一干燥一打磨一弹性涂料喷砂一去灰一喷面漆(头道)一放置一烘干一干燥一打磨一烘干一去灰一面漆(二道)一放置一烘干一自检一交验一清洁。
[0021] 对于上述喷涂工艺,除基材喷砂,底漆喷砂,喷涂弹性涂料,弹性涂料喷砂等步骤属于本发明工艺,需要一定的工艺条件实现,其余步骤均与常规喷涂工艺方法一致。
[0022] 带散热槽结构件产品喷涂生产的主要工艺过程:
[0023] 1.去油
[0024] 用180#洗涤汽油清洗结构件内、外表面的油污及其它赃物。铸造件须进行前后两次清洗,电镀件经酸化、氧化(化学氧化或电化学氧化)后的铝件在规定存放时间内未被二次污染的情况下,可直接进行保护工序后的喷底漆工序。
[0025] 2.放置
[0026]目的:让结构件表面残留的部分汽油溶剂挥发掉。
[0027] 3.烘干
[0028] 温度:(130 ± 5) °C (普通零件),时间:2h
[0029] (210± 10) 0C (铸造件),时间:3.5h铸造件须进行两次去油处理。
[0030] 4.保护
[0031] 用耐高温胶带对结构件不喷漆的部位进行遮蔽保护。
[0032] 5.打磨
[0033] 用(280〜320)#砂纸打磨至平整、无光的表面(对平面位置进行打磨处理)。
[0034] 6.基材喷砂
[0035]目的:对散热槽内基材表面进行粗化,增加基材与底漆间附着力,防止底漆掉落起层等质量问题。
[0036] 散热槽内基材喷砂工艺参数:
[0037] 喷砂材料:40目棕刚玉
[0038]喷砂压力:(0.2 〜0.4) Mpa
[0039]喷砂时间:10±2 (s/dm2)。
[0040] 7.去灰
[0041] 用干净抹布或毛刷擦干净并及时压缩空气吹干。
[0042] 8.喷底漆
[0043] a)施工环境要求:温度应不低于10°C,相对湿度应不大于80%,喷涂环境应基本清洁无尘;
[0044] b)漆液配制方法
[0045] 配漆前应将整桶油漆搅匀,按规定配比例将甲、乙两组分配好并搅拌均匀,用专用稀释剂调整施工粘度,熟化后,用200目丝絹过滤使用;
[0046] c)操作规范
[0047] 喷涂粘度:(14〜20) s (涂4#杯)
[0048]喷涂压力:(0.3 〜0.5) Mpa
[0049]喷涂距离:(200 〜250) mm
[0050]干膜厚度:(25 〜35) μπι。
[0051] 9.放置
[0052] 温度:室温,时间:(10〜20)min(根据温度高低,温度高放置时间短,低则长)。10.烘干
[0053]温度:(120±5) °C,时间:lh。
[0054] 11.刮腻子
[0055] 厚度应该不应超过0.5mm。
[0056] 12.底漆喷砂
[0057]目的:对散热槽内底漆表面进行粗化,增加底漆间的附着力,防止底漆掉落起层等质量问题。
[0058] 底漆喷砂工艺参数:
[0059] 喷砂材料:60目棕刚玉
[0060]喷砂压力:(0.2 〜0.3) Mpa
[0061]喷砂时间:10±2 (s/dm2)。
[0062] 13.喷涂弹性涂料
[0063]目的:对散热槽内底漆喷涂一层弹性涂料,增加后续喷砂过程中底漆涂层的耐冲击韧性,防止后续喷砂过程中底漆被冲击掉,提高喷涂过程的高效高质量性。
[0064] 弹性涂料:聚氨酯清漆。
[0065] 喷涂弹性涂料的工艺要求:
[0066] 喷涂粘度:(14〜20) s (涂4#杯)
[0067]喷涂压力:(0.3 〜0.5) Mpa
[0068]喷涂距离:(200 〜250) mm
[0069] 干膜厚度:(35〜45) μ m
[0070]烘干温度:(80 ±5) °C
[0071] 烘干时间:lh。
[0072] 14.干燥
[0073] 温度:室温;时间:lh。
[0074] 15.弹性涂料喷砂
[0075]目的:对弹性涂料表面进行粗化,增加弹性涂料与面漆之间的附着力,防止面漆与底漆掉落起层等质量问题。
[0076] 弹性涂料喷砂工艺参数:
[0077] 喷砂材料:60目棕刚玉
[0078]喷砂压力:(0.2 〜0.3) Mpa
[0079]喷砂时间:10±2 (s/dm2)
[0080] 弹性涂料表面喷砂工序完成后,按照常规喷涂工艺进行产品的面漆涂装生产即可。
[0081] 本发明的有益效果:与常规喷涂工艺相比,本发明分别在散热槽内基材表面,底漆表面及弹性涂料表面增加了三道喷砂工艺,其目的是对散热槽内涂层表面进行彻底打磨粗化,增强散热槽内基材与底漆、底漆与面漆涂层间的附着力,采用这样层层加强的方式,可以从整体上提高整个产品的喷涂质量,防止产品在日后使用过程中出现涂层开裂起层等质量问题,加强产品的“三防”性能,提高产品生产质量的合格率。同时在喷涂面漆前增加喷涂弹性材料工序,加强喷砂过程中底漆涂层的耐冲击韧性,防止后续喷砂过程中底漆被冲击掉,提高喷涂过程的高效高质量性。
具体实施方式
[0082] 样件选择:某型带散热槽的机箱:325 X 165 X 210臟,散热槽深18mm。
[0083] 按照本发明喷涂工艺对机箱进行喷涂实验:
[0084] 去油一放置一烘干一保护一打磨一基材喷砂一去灰一喷底漆一放置一烘干一刮腻子一烘干一打磨一底漆喷砂一去灰一喷底漆(加厚)一放置一烘干一找补刮腻子一喷涂弹性涂料一干燥一打磨一弹性涂料喷砂一去灰一喷面漆(头道)一放置一烘干一干燥一打磨一烘干一去灰一面漆(二道)一放置一烘干一自检一交验一清洁。
[0085] 主要工艺步骤及参数:
[0086] 1.去油:用180#洗涤汽油清洗机箱内、外表面的油污及其它赃物。
[0087] 2.烘干:将机箱放入130°C的烘箱中烘烤2小时。
[0088] 3.保护:用耐高温胶带对机箱的不喷漆部位进行遮蔽保护。
[0089] 4.打磨:用300#砂纸将机箱外表打磨至平整、无光的表面。
[0090] 5.基材喷砂:用40目棕刚玉以0.3Mpa的压力,时间控制在10s/dm2对散热槽内基材表面进行喷砂处理。
[0091] 6.去灰:用干净抹布或毛刷擦干净并及时压缩空气吹干。
[0092] 7.喷底漆:在温度不低于10°C,相对湿度应不大于80%的清洁无尘环境下按照工艺参数要求对机箱喷涂H9621锌黄飞机蒙皮底漆。
[0093] 8.放置:将喷涂底漆后的机箱在室温下放10〜20min。
[0094] 9.烘干:将机箱放入120°C烘箱中烘烤I小时。
[0095] 10.刮腻子:厚度应该不应超过0.5mm。
[0096] 11.底漆喷砂:用60目棕刚玉以0.2Mpa的压力,时间控制在10s/dm2对散热槽内底漆表面进行喷砂处理。
[0097] 12.喷底漆(加厚):在温度不低于10°C,相对湿度应不大于80%的清洁无尘环境下按照工艺参数要求对机箱喷涂H9621锌黄飞机蒙皮底漆。
[0098] 13.喷涂弹性涂料:按照喷涂弹性涂料工艺要求将聚氨酯清漆喷涂在散热槽内涂层底漆上。
[0099] 14.弹性涂料喷砂:用60目棕刚玉以0.2Mpa的压力,时间控制在10s/dm2对弹性涂料表面进行喷砂处理。
[0100] 弹性涂料表面喷砂工序完成后,按照常规喷涂工艺进行产品的面漆涂装生产即可。
[0101] 实验结果:
[0102] 涂层性能检测根据SJ/T10674《涂料涂覆通用技术条件》
[0103] 1.外观质量满足III级标准;
[0104] 2.涂层附着力满足I级标准。
[0105] 将实验所用机箱在工信部电子五所进行环境鉴定试验,其试验方法按照GJB150.11-86、GJB150.9_86、GJB150.10-86 中相关规定进行,其中:
[0106] 1、盐雾试验结果满足:144小时试验后满足相关判据及规范要求;
[0107] 2、霉菌试验结果满足:经试验后小于等于I级标准,满足相关判据及规范要求;
[0108] 3、湿热试验结果满足:240小时试验后满足相关判据及规范要。
[0109] 实验结果显示采用本发明喷涂工艺方法生产的带散热槽的机箱,其涂层性能及环境测试性能都能满足产品使用的规范及标准。
[0110] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (8)
1.一种增强带散热槽的结构件防护能力的方法,其特征在于:采用喷砂的方法粗化涂层表面,在喷涂面漆前加喷一层弹性涂料,并再次采用喷砂的方法粗化弹性涂料表面。
2.如权利要求1所述一种增强带散热槽的结构件防护能力的方法,其特征在于:所述涂层表面为散热槽内基材表面及散热槽内底漆表面。
3.如权利要求1所述一种增强带散热槽的结构件防护能力的方法,其特征在于:所述喷砂材料为棕刚玉。
4.如权利要求1所述一种增强带散热槽的结构件防护能力的方法,其特征在于:所述喷砂时间为10 ±2 (s/dm2)。
5.如权利要求1至3中任一项所述一种增强带散热槽的结构件防护能力的方法,其特征在于:对散热槽内基材表面喷砂所用棕刚玉大小为40目,对散热槽内底漆表面及弹性涂料表面喷砂所用棕刚玉大小为60目。
6.如权利要求1至2中任一项所述一种增强带散热槽的结构件防护能力的方法,其特征在于:对散热槽内基材表面喷砂所用压力为(0.2〜0.4)MPa,对散热槽内底漆表面及弹性涂料表面喷砂所用压力为(0.2〜0.3) MPa0
7.如权利要求1所述一种增强带散热槽的结构件防护能力的方法,其特征在于:所述弹性涂料为聚氨酯清漆。
8.如权利要求1所述一种增强带散热槽的结构件防护能力的方法,其特征在于:喷涂弹性涂料的工艺参数为: 喷涂粘度:(14〜20) s (涂4#杯) 喷涂压力:(0.3〜0.5) Mpa 喷涂距离:(200〜250) mm 干膜厚度:(35〜45) μπι 烘干温度:(80 ±5) °C 烘干时间:lh。
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