Shanghai Daoqin Plastics Co., Ltd.

         in mold manufacturing in, mold gas is non important step/link. mold gas can most large degree upper table/sheet mold overall structure good bad. make excellent mold if has good gas, can can quality stability product, good mold is property good, but also can ensure gas 体自由排出, is gas by high degree pressure shrink. that mold gas has what standards 呢?

        首先 need understanding combined 理 排 gas generate below/following defect:

        1, gas 体堆积会浸蚀 mold surface and separation 模线;

        2, color issues: Color Difference, make color or 变亮;咬花面亮雾不一

        3, need increase mold light: time, and make easy 腐蚀;

        4, can can make product to requirements standards;

        5, generate more combined 线(this combined 经不牢 solid, and 不美观);

        6, 会浪费太 more injection molding pressure, increase injection molding machine as difficult degree;

        7, use high material temperature degree (increase injection molding machine as difficult degree, temperature 控失常, material property can 出现偏差, increase ring time);

        8, reduce material grade 别;

        9, reduce product true degree and product deformation;

        10, high pressure gas in mold cavity inner force increase ring unstable property, 会经常 property need machine solution quality issues;

        11, make technology 人员, QA, as and 模房人员 工 as increase difficult.

        第二我们 understanding lower combined 理 排 gas technology requirements:

         need can can full gas structure, deep degree in plastics value inner, full gas is most 佳, need 留1/2 钢材 in clamping upper pressure.

         if 因PL面不规则不 can full gas, relatively good methods is use 12mm wide gas to 母模, gas most must to large gas in, need can can use belt/tape 倒角 铣刀 processing gas 槽, if need use 球形铣刀, need 计算清楚 processing deep degree and processing deep degree 一致才 can use, gas long degree is most easy by large more overlook, 并关系 to combined 适 排 gas issues;

         in issues upper has many 并不尽 same dimensions 规定 说 method, material supply specifications from 3~5mm, experience if long degree large 于3mm will again to good function, therefore, safety 起见, 我们规定 standards is 3mm, gas deep degree 决定于 molding material, has 疑问, can processing specifications.

        一 most Common concept is more gas 导致披锋, upper direction is for, combined 理 排 gas add large pressure, 当允许 gas 体排出时, material gas 体走出, 而唯一导致排 gas amount 而致披锋则 is gas deep degree deep.

         usually need amount use full 部顶针排 gas, this for/regarding large parts parts is important, this 点当然也决定于顶针 直径, if this can can, need abrasion 平面排 gas, use combined long degree and deep degree, decrease 缓顶针配 combined 间隙, runner especially is large or long runner need gas.

        另一 Common issues is parts can full gas 时, most rear 充胶位 and most rear 充胶位必 must by to, 此两位必 must add gas. deep 骨位, and small 针点胶位 or thin must 特殊考虑排 gas, or use 扁顶针, semi structure or use gas 钢, use true gas 装臵.

         that need attention/notes what 呢?

        一 parts can gas more, tube/pipe clamping can to, this belt/tape below/following and gas has issues: has 足够 钢材 in clamping upper pressure, separation upper gas by pressure combined;

         most good gas most 终也会消失, 经 一定 material ring rear, if has 足够 钢材 in clamping upper pressure, mold combined in 一起, gas abrasion loss, clamping 线应避开 mold clamping separation decrease/reduce, this is large to most large issues. front rear parts mold, front rear material can in separation clamping front clamping. positive 确 做 method is in 模架AB sheet/plate between use resistant pressure block meanwhile clamping.