Shanghai Daoqin Plastics Co., Ltd.

轿车保险杠 is important external trim parts, 随 轿车 coating requirements improve/increase, 保险杠 coating 装也越 越受 to 各专业厂 heavy 视. 轿车保险杠 main/primary using/adopting plastics 材质, coating material in its surface difficult 于附, another plastics parts heat deflection temperature (HDT) low and other, generally production in selection coating material dry temperature degree low metal parts use coating material dry temperature degree, therefore plastics parts coating and metal parts coating in process and coating material and other has very large different, 保险杠 coating generally and coating mixed production. currently internal separation large type automotive manufacturing already will 保险杠 injection molding and coating as is production important separation, in new factory construction 保险杠 injection molding and coating workshop, Japan in inner construction factory in has resin workshop （即保险杠 and other plastics parts injection molding and coating workshop ）. inner has automotive manufacturing 厂 保险杠由 large type plastics parts processing provide, inner large type automotive plastics parts production has anionic and Shanghai 延锋伟士通 and other.
    inner more strip/profile 保险杠 coating design absorption day 韩, and other experience technology, this coating production in process, equipment 布置, machine 械化形式 upper has very more different 方. is reduce plastics 保险杠 processing cost improve/increase its coating quality, in coating material, coating process and coating equipment and other 方面进行 a large amount of research, 取 一定 formed 果, therefore coating design most year relatively large 变化.

    1 coating 装线 总体布置

    large type coating overall 布置趋 toward 于区域化 and 立体化. amount will types or type equipment and 工序布置 in 同一 区域, 以便于 production and tube/pipe 理. main/primary upper lower parts 工位, front 处理, abrasion, 检查, and equipment; main/primary 布置喷漆室, dry 室, 空调平台区域. this type of 立体化, equipment separation 区 布置 methods more has improve/increase spray coating 洁净区 洁净 degree, this for improve/increase product parts one-time lower qualification rate has very large 帮助. coating workshop is full 封闭厂房, in upper, lower parts 时都站 in production mono as, 保险杠 coating using/adopting spray coating and spray coating versus combined 形式, 喷漆室 waste gas using/adopting in high 空排放 or waste gas in rear 排放, system using/adopting in and small system versus combined 模式.

    2 coating material

    plastics raw materials 保险杠 heat resistant property relatively 差, high temperature easy deformation, therefore 保险杠 coating generally can selection dry temperature degree high coating material, inner use plastics raw materials coating material dry temperature degree large is 80±5℃ and 120±5℃. 保险杠 coating is composite/compounding coating 即底漆+ color 漆+清漆, has di separation and mono separation types, color more using/adopting mono separation paint, more using/adopting di separation paint. di separation 底漆烘烤 rear tool has relatively good cover/cap force, and can for surface pellets and other paint defect 进行打 abrasion 处理, especially suitable for parts appearance relatively 差 情况, di separation wet film lower conductive property generally comparison 差, 如底漆不进行烘 dry spray coating color effect/influence color 漆 附 force. di separation 清漆施工 scope/range wide, mono separation versus ratio, tool has less, adjustment easy advantages. using/adopting di separation and system coating in equipment investment large, paint tube/pipe maintenance complex and other disadvantages, paint 本身容 easy adjustment, easy obtain good film surface 状态.

    3 coating process

    3.1 coating main/primary process 形式

    plastics 保险杠 commonly used coating process process/workflow is: upper parts → front 处理→ water separation dry → strong/high cold →火焰处理→ upper 遮蔽→ remove electrical →喷底漆→流平→底漆烘 dry → strong/high cold →底漆检查/打 abrasion → remove electrical →喷 color 漆→流平→喷清漆→流平→面漆烘 dry → strong/high cold →检查修饰→ lower parts →不 combined product 返修. upper process process/workflow is 三喷两烘（3C2B） process, also has types 三喷一烘（3C1B） coating process （ will upper process process/workflow in “底漆烘 dry ” to rear “ remove electrical ”工序取消）. 3C1B process can equipment one-time property investment and rear equipment cost, inner already has production capacity relatively large plastics 保险杠 coating using/adopting process 形式, already 投入批 amount production, market trends comparison stability. to 3C1B coating process in inner coating production design in application relatively less, 且3C1B process in coating material parameters control, coating 装现场 tube/pipe 理, coating film property can ensure, product one-time lower qualification rate ensure and other 方面存 in 一定风险, meanwhile automotive production large more requirements 保险杠 coating using/adopting 3C2B process, therefore inner has coating production in 按3C2B process design, construction meanwhile can achieve 3C1B process 形式.

    3.2 front 处理

    plastics 保险杠 coating front front main/primary is remove parts surface 灰尘, and demolding agent and other, meanwhile for surface active 化处理. front 处理不 good easy formed film force defect, shrink and pellets and other defect. front has types 形式, types is 自动喷淋, types is scratch 拭. 自动喷淋 is will parts in equipment upper front 处理喷淋线, main/primary is: 预脱脂→脱脂→ water 洗1→ water 洗2→ new 鲜DI water 洗→吹 water → water separation dry → strong/high cold; scratch main/primary is use solvent agent scratch 拭整 工 parts surface, can decrease/reduce equipment one-time property investment and its cost. inner large amount plastics 保险杠 coating more using/adopting 自动喷淋, small amount 保险杠 coating and small parts coating more using/adopting scratch methods.

    3.3火焰处理

    火焰处理 can 进一步 active chemical industry parts surface. machine toward parts surface 喷射火焰, in 火焰处理工序 rear 设置 手工 and remove electrical 工序, reinforcement parts and coating film combined force.

    3.4 upper 遮蔽

    upper main/primary is for parts surface certain need spray coating 区域进行遮蔽处理, generally upper relatively difficult, more using/adopting outer 遮蔽.

    3.5喷漆

    parts spray coating more using/adopting machine 人自动 spray coating and spray coating versus combined methods, is spray coating, rear is 人工检查补喷. has production debugging formed 进入批 amount production already can full 自动化 spray coating, coating main/primary using/adopting machine spray coating, generally more using/adopting gas 喷枪, color 漆2 工 as generally using/adopting 旋杯工 as 站＋喷枪工 as 站, 清漆2 工 as generally using/adopting 喷枪＋旋杯工 as 站.

    4 coating equipment

    plastics 保险杠 coating equipment main/primary has machine 械化输送 equipment, front equipment, 火焰处理 equipment, 喷漆室 equipment, dry and 人工工 as equipment and other.

    4.1 machine 械化输送 equipment

    plastics 保险杠 spray coating machine 械化输送 equipment relatively more, has 普通悬挂输送链, toward 积放链 and slip 橇输送形式 and other. slip 橇输送形式布置灵 active more 变, inner year formed production very more using/adopting slip 橇输送, day 系保险杠 coating main/primary using/adopting toward 积放链. to front process system separation equipment has anti water property and resistant property requirements and dry temperature degree effect/influence, generally front 处理, dry in slip 橇输送 system plant/unit using/adopting outer 置式.

    4.2 front equipment

    front equipment main/primary has non equipment, ring system and system and other. plastics 保险杠 脱脂 liquid is acid property （pH value generally in 6.4 left right ）, different 于车身 脱脂 liquid, therefore front equipment need resistant acid property, front 处理封闭室体, using/adopting 不锈钢材 material. front equipment 室体顶部装 has machine, 以避免 gas toward outer expand dispersion, front 处理室体一侧设检修平台, 室体设检修门, 检修门 add 装悬臂式探照灯, has 关人员进行 equipment repair and 维护.

    4.3喷漆室

    inner has coating production 线 喷漆室 has 文氏喷漆室, water 旋喷漆室 and water 帘式喷漆室 and other, more using/adopting 文氏喷漆室. 喷漆室送, system has full new methods and ring methods types. full new methods is 喷漆室送风空调 machine from outer rear, 经 空调 machine more grade rear 送入喷漆室, 风经 喷漆室 utilizing rear through 喷漆室排风风 machine full 部排入 large gas; ring methods is 喷漆室 inner ring utilizing （即风 through 送风空调进入喷漆室, rear again 经 循 ring 风处理 equipment to 送风空调 again utilizing ）, 喷漆室风不 is full 部排放, 进行部 separation and separation 补充. and 排风 风 amount how much need according to 喷漆室 风 amount balanced, 喷漆室 in waste gas 爆炸极限 concentrated degree and paint property can requirements 进行计算, has production 线 风 amount amount design is ring amount 10%, 30% and other. 喷漆室排风 and 补风 风 amount low, low 会导致循 ring in has machine solvent agent content high, easy formed film surface light, spray coating parameters relatively difficult. using/adopting ring 风 喷漆室 waste gas concentrated degree relatively high （ ultra- 国家 environmental protection standards requirements ）, will waste gas rear to large gas in （经焚烧处理 rear waste gas can meet/satisfy environmental protection requirements ）. 喷漆室 temperature degree generally requirements control in 23℃ left right, need 进行换 hot, need made cold, using/adopting full new 风形式 coating production can consumption relatively large. using/adopting ring 风空调 methods can decrease/reduce production can consumption （ comprehensive can consumption can reduce 30% above, related equipment machine rate can decrease/reduce 40%）, 节约运行 cost. 喷漆室 using/adopting ring methods 送风, versus combined spray coating need using/adopting spray coating, is ring gas in has gas content relatively high, combined 人工操 as, 如人工 spray coating need has anti function clothing/apparel and tool.

    4.4烘 dry 炉

    dry 炉 形式 main/primary has 直通式, and П type 3 types. day coating production machine 械化输送 more using/adopting toward 积放链形式, dry is 桥式烘 dry 炉; system using/adopting light type slip 橇输送 system, dry is П type dry 炉. dry more using/adopting di 行程烘 dry 炉, can decrease/reduce dry dispersion hot 面积, reduce can consumption.

    4.5供漆 system

    system has types, types is in system, has paint in in 特定 区域 inner 进行调配, in system need amount in 距离3 喷漆室近 方, decrease/reduce 因供漆 tube/pipe long formed pressure loss and temperature degree loss 失, 并避免 tube/pipe 路清洗困 difficult and other; types is system, 即输调漆 equipment in spray coating 室附近. system use 供漆罐容积 versus for in need small very more, therefore system by is small system. small system advantages is can meet/satisfy relatively small paint material lower spray coating production, used for 不经常 production color 漆, new color made and adjustment color coating 装; in system used for 底漆, and types amount large color 漆.
    5结束语

    for environmental protection as 越 越 heavy 视, environmental protection already published related production standards, coating waste gas requirements will 越 越严格, coating production already toward water property direction development, 保险杠 coating 装也必然 toward water property coating direction development, inner already has 保险杠 coating using/adopting water property coating 装.