Shanghai Daoqin Plastics Co., Ltd.

         mold use lifespan made 约 精冲 technology application and development bottle 颈, therefore for/regarding mold use lifespan 我们一定 need 关注起, lower small to large provide effect/influence mold use lifespan factors has which,并告诉 large improve/increase mold use lifespan has which 途径.

         effect/influence mold use lifespan factors:

        1, parts structure process property (尖角, thin 壁, 悬壁, dimensions and other).

        2, parts material (材质, material thick, hardness, property, surface quality).

        3, mold structure (strong/high degree, rigid degree, mold toward, small 凸模 导 toward, gas and lubricated).

        4, mold material (材质, carbon material large small and uniform property, hardness, tough property).

        5, mold manufacturing (模坯锻造, processing process, hot 处理, 线切割, abrasion, assembly).

        6, production as (调模 high degree, pressure, speed degree, material degree, material 清洁, lubricated).

        7, mold repair (combined 理存放, combined abrasion, 清洁, force 回火, anti 锈).

         improve/increase mold use lifespan 途径:

        1, 审查精冲 parts process property. parts process property (especially is semi 径) for 精冲模 lifespan has effect/influence, for/regarding process property relatively (especially 尖角), toward design 部门提出 improvement 建议. 图1 is parts semi and mold lifespan 关系, generally R / t ≥0. 8 relatively good, small 于0. 25 则会导致 mold lifespan relatively low.

        2, mold material selection and hot 处理. mold main/primary as parts material generally 选Cr12MoV, made parts thick degree large 于4mm 时, 凸, can using/adopting W6Mo5Cr4V2 high speed 钢. for/regarding as strong/high degree very large, force 苛刻 凸模 and 凹模,则 using/adopting powder 末冶金钢(V4, ASP23, ASP30) or hard alloy GT30. 凸, hot hardness generally 取58~62HRC, for/regarding abrasion loss is main/primary 失效形式, simple mold, can 取60~64HRC; for/regarding complex, 并以崩刃 is main/primary 失效形式 mold, can 取56~60HRC, 甚至54~58HRC.

         for/regarding Cr12MoV mold hot 处理, 当刃口形状 relatively simple, material thick relatively thin (t ≤3mm), using/adopting 1 次 hard process (1020°C 淬火, 220°C 回火) can obtain relatively high strong/high degree and wear resistance. 当刃口形状 relatively complex, material relatively thick (t > 3mm)时, using/adopting 2 次 hard process (1080°C 淬火, 520°C 回火)则 can obtain relatively high impact tough property and stability property. for/regarding W6Mo5Cr4V2 mold hot 处理, must using/adopting low temperature process can obtain relatively high strong/high degree and good tough property.

        3, 精冲模 structure design attention/notes issues. mold force need good, anti 止偏载, 悬臂, mono toward force and other; can * 导 toward for/regarding decrease small as parts abrasion loss, ensure uniform property, mold and pressure in 心 不 for positive is has 效. in design deep long small 孔 凸模时, combined using/adopting 凸模护 sleeve/set structure, in design certain large type mold 时, in its internal structure in 应考虑 using/adopting small increase toward degree. pressure material sheet/plate, 凸模导 toward need good,当 material thick t ≥4mm 时,凹模 most good is add force sleeve/set. due to mold parts between combined comparison precision, use lubricated very 稠, in 凹模底面 and 冲孔凸模间, and in combined 准确 凸模 base/seat and base/seat easy formed 密闭空间. mold process in, 封闭区 空 gas easy speed 排走, make mold parts due to scratch hot amount easy gas belt/tape 走, will effect/influence parts sheet/plate, material 杆 运动, decrease low production speed degree, 甚至会引起 made parts phenomenon, effect/influence 精冲模 positive lifespan, therefore in 凸, 凹模底面, solid sheet/plate and base/seat upper gas 槽.

        4, 精冲模 assembly. mold assembly remove need attention/notes upper, lower 模刃口间隙 uniform, degree and parts combined outer, also need especially attention/notes as parts versus high degree, ensure mold in combined and 开启状态 positive 确位置, ensure its as can * property.

        5, production as and repair. in mold adjustment pressure 时, in ensure parts quality front lower, pressure material force and pressure amount small value, in use 精冲连续模时, strip/profile material parts and parts need especially attention/notes mold force balanced, 否则凸模容 easy 因受侧 toward force 而折断. in material attention/notes strip/profile material high degree made and other plant/unit, anti waste material heavy pressure. made parts ultra- 标时应 and abrasion,刃 abrasion amount generally is 0. 1~0. 2mm,并 attention/notes remove internal stress.