Shanghai Daoqin Plastics Co., Ltd.

        一, overview

        泄漏 is injection molding machine 普遍存 in fault/failure phenomenon, main/primary is due to liquid in liquid pressure parts and tube/pipe in flow generate pressure and parts in and other 引起泄漏. injection molding another, poor conditions for injection molding machine generate effect/influence. liquid pressure system 一旦发生泄漏, will 会引起 system pressure 建立不起, liquid pressure 油泄漏 also formed ring 境污染, effect/influence production generate method 估计 严 heavy rear 果. lower for effect/influence injection molding machine liquid pressure system factors simple lower its causes and countermeasures.

        二, classification

         injection molding machine liquid pressure system main/primary has types, solid 定密封处泄漏 and 运动密封处泄漏, solid 定密封处泄漏 部位 main/primary 包括缸底, tube/pipe 接头 连接处 and other, 运动密封处 main/primary 包括油缸 active 塞杆部位, more 路阀阀杆 and other 部位. from liquid upper can separation is outer and inner 泄漏, outer main/primary is liquid pressure from system to ring in, inner is due to high low pressure pressure 差 存 in and seals and other causes, make liquid pressure in system internal high pressure toward low pressure 侧.

        三, effect/influence causes

        （一） design factors  

        (1) seals selection

         liquid pressure system can property, in very large degree upper 取决于 liquid pressure system design and seals selection, due to design in structure selection combined 理, seals selection combined specification, in design in has to liquid pressure and 密封材 material versus type 式, negative 载情况, pressure, as speed degree large small, ring temperature degree and other. this in different degree upper or 间接造 formed liquid pressure system 泄漏. another, due to injection molding machine use ring in tool has and 杂质, therefore in design in need selection combined anti 尘密封, 避免尘埃 and other material system bad 密封, 污染油 liquid, from generate 泄漏.

        (2) other design causes

         design in to surface 几何精 degree and coarse degree comprehensive and in design in has 进行连接部位 strong/high degree and other, this in machine 械 工 as in 引起泄漏.

        （二） manufacturing and assembly factors  

        (1) manufacturing factors

         has liquid pressure parts and 密封部 parts has dimensions 公差, surface treatment, surface light degree and 形位公差 and other requirements. if in manufacturing process in ultra- 差, 例如: active semi 径, 密封槽 deep degree or wide degree, 装密封圈 孔 dimensions ultra- 差 or processing issues formed 失圆, has or has 洼点, 镀铬脱落 and other, seals has deformation, 划伤, pressure or pressure and other phenomenon make its 失 密封 function. will make parts tool has property 渗漏点, in assembly rear or use process in 发生渗漏.

        (2) assembly factors

         liquid pressure parts in assembly in 应杜绝野蛮操 as, if degree use force will make parts generate deformation, especially is use copper rod and other 敲打缸体, method and other; assembly front for parts 进行仔 fine 检查, assembly will parts less liquid pressure 油, light light pressure 入, 清洗时 application 柴油, especially is 密封圈, anti 尘圈, O形圈 and other 橡胶元 parts, if use 汽油则 make its easy aging 失 原 has elastic property, from 而失 密封 machine can.

        （三）油 liquid and parts loss 伤

        (1) gas 体污染

         in large gas pressure lower, liquid pressure in can solvent understanding 10% left right gas, in liquid pressure system high pressure lower, in liquid in solvent understanding more more gas or gas 体. gas in liquid in formed bubbles, if liquid pressure in as process in in short time inner, pressure in high low pressure between speed 变换就会 make bubbles in high pressure generate high temperature in low pressure 侧发生爆裂, if liquid pressure system parts surface has and loss 伤时, liquid pressure 油就会 high speed toward parts surface accelerated surface abrasion loss, 引起泄漏.

        (2) pellets 污染

         liquid pressure as is injection molding machine liquid pressure system main/primary 执行元 parts, due to as process in active 塞杆裸露 in outer and ring versus 接触, although in toward sleeve/set upper has anti and seals and other, difficult will 尘埃, material belt/tape liquid pressure system, accelerated seals and active and other and abrasion loss, from 而引起泄漏, pellets is liquid pressure parts loss bad most fast factors 之一.

        (3) water 污染

         due to as ring wet and other factors effect/influence, can can make water liquid pressure system, water and liquid pressure reaction, formed acid property material and 油泥, reduce liquid pressure lubricated property can, accelerated parts abrasion loss, water also formed control 阀 阀杆发生 adhesion, make control 阀操纵困 difficult seals, formed 泄漏.

        (4) parts loss 伤

         seals is oil resistant and other material made formed, due to long time use aging, crazing, loss and other 都会引起 system 泄漏. if parts in as process in 受碰撞而 loss 伤, 会划伤密封元 parts, from formed 泄漏.

        四, main/primary anti countermeasures

        造 formed injection molding machine liquid pressure system factors is more comprehensive effect/influence 结果, has technology and material, need from upper remove injection molding machine liquid pressure system is very difficult to. has from above effect/influence liquid pressure system factors 出发, combined measures amount decrease/reduce liquid pressure system 泄漏. in design and processing step/link in need separation effect/influence important factors 密封沟槽 design and processing. another, seals selection is non important, if in most comprehensive 考虑泄漏 effect/influence factors, will to rear production in belt/tape method amount loss 失. selection positive assembly and methods, 借鉴以往 experience. 如, in 密封圈 assembly in amount using/adopting specialized tool, and in 密封圈 upper coating lubricated 脂. in liquid pressure 油 污染 control upper, need from 污染 源头入手, add strong/high 污染源 control, also need has 效 滤 measures and 定期 油 liquid quality 检查. is has 效 切断 outer factors (water, 尘埃, pellets and other) for liquid pressure 油缸 污染, can add anti measures and other. 总之, anti need comprehensive 入手, comprehensive 考虑才 can to has 效.