Shanghai Daoqin Plastics Co., Ltd.

        冲 pressure mold tensile parts product quality analysis in product tensile process in, tensile parts main/primary 会出现 this types issues: 起皱, cracking, thin thick 不均, surface 划痕, 形状扭曲, elastic and other. in this phenomenon in, 以起皱 and cracking for product quality effect/influence most large, product this types issues is 一定交不 货, must need adjustment good, this types issues product generally can waste, is need.

        一, 起皱 材 material in tensile process in, 他 周围边缘部 separation due to toward force large, formed material stability, make product 沿边缘切 toward formed high low 不平 皱纹, is 起皱. 起皱严 heavy 时, also will 引起材 material in tensile process in difficult through and 凸模 间隙, increase large tensile deformation force, 甚至导致拉裂. phenomenon generate, 既取决于材 material 边缘切 toward force large small, 也取决于 tensile parts thick degree. generally 说, tensile mold use nitrogen gas elastic or excellent force comparison good, comparison easy generate 起皱, cracking and other phenomenon. is what 呢?因 is nitrogen gas elastic or excellent force it force generally comparison 均衡, 不会出现 force amount large small issues. nitrogen gas elastic ratio excellent force need good 一, is nitrogen gas elastic force amount large, non 常均衡, is price need ratio excellent force upper good more 倍, good more 厂都买不起 it, generally has 规模稍 micro large factory has use nitrogen gas elastic 簧. excellent force use time long, 就会萎 shrink 掉, force amount 就没当初 that large, must more new can, is it price ratio nitrogen gas elastic need good more. anti 止起皱 can using/adopting pressure 边圈, has is pressure material 筋, is 一 意思, is in effect/influence product rear 面工序 情况 lower, in material 周围放 upper 一圈凸起 筋, pressure material 筋, material pressure 住, this benefits is, tensile product comparison saturated 满, can anti 止起皱. pressure force in mold trial is need versus for adjustment, generally design 出 都不会 that combined 理, need according to product rear for pressure material high degree 适当做出 adjustment. pressure force large, will 导致材 material and 凹模以 and pressure between scratch force increase large, make material 壁部变 thin, 甚至拉裂; pressure force small, that 么就不 can has anti 止起皱.

        第二 issues is 拉裂, this is tensile process in 经常碰 to issues. 当筒壁处 受 拉应 force ultra- 材 material strong/high degree 极限时, product 会拉裂, generally in 凸模圆角稍 upper 一点 筒壁处. effect/influence product factors has: material tensile property can, material and thick degree, deep 系数, 凹凸模 圆角 semi 径, pressure force, friction coefficient and other. 凹凸模 圆角 semi small, 太尖, easy product 拉裂, generally use methods is method add large, 圆角处搞 light slip 一点, 抛亮一点, in in production add 油打也 can, especially is tensile specialized 油, non has 效果. design pressure mold 时候, can in product requirements 允许 情况 lower, amount add large, need 搞 太尖, has design 不太懂, design tensile mold, mold trial cracking very 厉害, 想累死钳工啊!修模修 烦死人. tensile 时, using/adopting necessary lubricated, has tensile process 顺利进行, decrease thin to improvement. must attention/notes, lubricant can coating in 凹模 工 as surface, in and material 接触 面千万不 need lubricated, is and surface is belongs to has scratch, it can anti material sliding, 拉裂以 and thin.