Shanghai Daoqin Plastics Co., Ltd.

         mold 腐蚀生锈经典案例 analysis, in this for mold hot rear surface 出现腐蚀生锈疤痕, mold in rear easy generate cracks formed mold waste, mold in use process types generate 生锈状态, plastics mold long time 放置导致生锈 causes and how to anti mold measures analysis and summary.

        案例一

        按HRC32-35 hot requirements, 经 690 degree high temperature 处理, H13锻打 process to mold surface 生锈, versus analysis 结果显示 its is: 针状回火马氏体+ relatively more block 状共晶 carbon material + fine small pellets 状二次 carbon material distribution, mold surface 出现腐蚀生锈 疤痕 causes?

        1.出现 relatively more block 状共晶 carbon material, Raw Materials 组织偏析没 has to improvement, fine 化处理 目 也就 is uniform 化组织, formed separation different 区域淬火也会 generate 组织应 force

        2.晶界出现 relatively more carbon material, 说明淬火 process in, cooling speed degree slow, mold surface pressure force relatively low 底, 不足以抵消抵消 in temperature deformation formed 组织应 force, 组织应 force for product 腐蚀起 to promote function

        3.淬火 if using/adopting cold, decrease/reduce cooling time, decrease light 组织应 force, if using/adopting gas cold, need long gas time

        4. product 淬火出油 rear, 需立即回火, balanced 组织, force

        5. product 回火出炉 rear, using/adopting cold promote 残奥转变, most good using/adopting 3次回火, anti rear 续残余奥氏体时效转变, increase 组织应 force, effect/influence product resistant property.

        案例二

         mold in rear easy generate cracks, formed mold waste causes?

         mold generate cracks and mold most 终球化组织 coarse large 不均, 球化不完善, has 网状, belt/tape and carbon material has 关. generate causes can can is

        1. mold material 原始组织存 in heavy carbon material 偏析.

        2.锻造 process 不佳, 如锻造 add hot temperature degree high, deformation amount small, temperature degree high, rear cooling speed degree slow and other, make 锻造组织 coarse large has 网状, belt/tape and carbon material in, make 球化退火时 difficult remove.

        3.球化退火 process 不佳, 如退火 temperature degree high or low, and other temperature time short and other, can formed 球化退火组织不均 or defect.

         solution methods

        1. generally according to mold as conditions, production amount and material strong/high tough property can, amount selection quality good mold material.

        2.改进锻造 process or using/adopting positive 火预备 hot 处理, remove Raw Materials in and carbon material and carbon material non-uniform property.

        3. for method 进行锻造 carbon material 偏析严 heavy high carbon mold can solid solvent fine hot 处理.

        4. for rear made positive 确 球化退火 process specification, can using/adopting hot and fast speed fine 球化退火工.

        5. combined 理装炉, ensure inner temperature degree uniform property.

        案例三

         mold in use process types generate 生锈状态, effect/influence manufacturing parts 美观程 degree, 甚至会 effect/influence to parts quality use. mold main/primary has 两点, is mold factors, is mold use ring factors, good this 两点, can has 效避免 mold use process in issues.

         mold causes main/primary has 三点

        1. molding material separation understanding formed material.

        2. mold 回潮.

        3.手汗.

         solution mold methods

        1. short countermeasures: use 手拿布 light scratch mold cavity surface. for molding material 进行充 separation drying, decline material temperature degree anti material separation understanding.

        2. long countermeasures: products material formed separation understanding formed material for mold has 腐蚀 材 material.

        案例四

         plastics mold if time comparison long, has 经 专业 处理, plastics mold 也会生锈, effect/influence plastics mold lifespan, that how to anti plastics mold 生锈呢?

         plastics mold therefore 会生锈 is material hot separation understanding rear generate gas 体 导致, anti plastics mold measures can from below/following 几方面 手:

        1.当 injection molding 停止以 rear, need use dry soft dry will plastics mold products scratch dry 净.

        2. in processing mold also has molding 时候, need attention/notes will its combined, this benefits main/primary is is 避免周围 other injection agent generate gas formed 腐蚀.

        3.当关闭 plastics mold 时候, most good coating upper 黄油. most rear, long time molding 时, need in mold cavity upper anti agent, need attention/notes is, in front, need will mold cavity scratch dry 净, to has 锈斑.

         other mold 腐蚀生锈 anti 护建议:

        1. if mold cavity surface upper type carbon material, mold 生锈, and troubleshooting; molding material in and separation understanding formed carbon material make mold abrasion loss or 腐蚀, 一旦发现应立即 use dry scratch remove. relatively difficult scratch remove, can less 许酒精 lubricating wet rear scratch remove.

        2. generally in mold cavity inner electroplating has anti 锈, is 并不完 full has 效, has 时腐蚀 property gas through plating surface gas generate deep degree 腐蚀, plating methods is scratch mold.

        3, mold in cooling water easy make mold 生锈. will mold cooling to below/following, gas in gas in mold surface formed water 珠, scratch remove 就会生锈. although molding process 不会结露, 但停止 molding rear, upper generate cold water, production process in most good need molding, make need 停止, 也应关断 cooling water, will mold surface scratch dry.