Shanghai Daoqin Plastics Co., Ltd.

         screw classification

         usually can separation is type, type, type, mixing/compounding type, separation type, separation type and various type, type, DIS开扎 separation type and gas type and other;螺桿头数 can is mono or is and other.

         for/regarding generally add flame retardant plastics, use general purpose 螺桿就 can processing, need according to different melt viscosity selection different 直径即 can.

         if is property can relatively plastics, products or pellets plastics,必 must use specialized 螺桿.

         specialized screw introduction

         general purpose for certain types plastics 说, in and consumption rate and other ratio upper specialized property can excellent 越. lower is various product, need manufacturing specialized as introduction.

        PC specialized 螺桿:

        PC is high viscosity non crystallization property plastics, flow property 差, long time hot easy degradation, add material large, difficult melt, easy 滞塞, high material temperature, high pressure injection, material temperature adjustment scope/range relatively narrow, process property 不如PMMA.

        螺桿 using/adopting Imported high alloy full hard 化处理, has 效承受 high force, high pressure impact, wear resistant consumption, surface electroplating, corrosion resistant,平 slip 无孔隙以 decrease/reduce surface viscous and degradation, fine structure 精心处理, has anti 止, low design,发 hot small. generally in small 直径, molding PCABS+PC, PP-R, flame retardant ABS and other good. can molding generally plastics and PMMA普通 products, mixed color relatively 差. plastics in add color powder, 需订做 add strong/high mixed color type 螺桿.

        配 combined ultra- thin precision molding, provide 螺桿直径 large small, long short, improves injection shot pressure to 3000Kgf/cm above, base/seat front renovation (renovation rear can positive 常恢复原状).

        PMMA specialized 螺桿:

        PMMA is high viscosity non crystallization property plastics, property strong/high tough add material large, difficult melt, easy 滞塞, 剪切敏感 easy degradation, flow property 稍差,必 must high material temperature, high pressure injection, material temperature adjustment scope/range wide, process property relatively good. pressure shrink comparison large, using/adopting Imported high alloy full hard 化处理, has 效承受 high force, high pressure impact, surface electroplating hard decrease/reduce surface viscous and degradation, uniform good, mixed color good, low design hot low, degradation rate low. generally in 间直径, molding PMMA, PP-R, PC, retardant ABS and other add color powder 时效果 good.

        CP, CA acid property 螺桿组 parts:

        针 for CP, CA and other acid property plastics property strong/high features, 螺桿, 熔胶筒以 and its it parts in structure and surface treatment upper 都做 特殊 design. 螺桿组 parts corrosion resistant property good. recommendation sleeve/set use di alloy material corrosion resistant.

        PVC specialized 螺桿:

        PVC plastics can separation is and powder 状, for temperature degree reaction non 常敏感 easy separation understanding, viscosity high, property strong/high. design has features: surface must 镀铬;没 has separation and separation 胶介子. 螺桿塑化 good, 剪切发 hot less, resistant acid property 腐蚀. is has 胶圈, can used for low viscosity plastics and injection speed degree pressure separation grade relatively products.

        螺桿 design has types: and separation 胶头一体式;螺桿 and separation separation 开式. for product quality requirements high and made mono 一塑(PVC)则 use 连体式 most combined 适, 反之则 can selection separation 体式, attention/notes,螺桿 and separation separation easy formed material. selection types 螺桿我司建议必 must add upper specialized temperature degree table/sheet as temperature degree control, due to dispersion hot drop temperature,做PVC product 时熔胶筒 need using/adopting strong/high made cold measures and 螺桿配 combined use. made toys soft PVC remove outer.

        PU, TPU specialized 螺桿:

        针 for PU剪切敏感 easy 火, viscous force strong/high and features design, surface electroplating hard 铬, add material 顺畅, efficiency high, temperature rise low.

         soft 胶, EVA foaming type specialized 螺桿:

         low 剪切, high efficiency design, surface electroplating hard 铬.

        PET specialized 桿:

        PET plastics is generally plastics bottle material commonly used raw materials, viscosity low, flow property good, specific heat capacity large, easy viscous material,, molding temperature degree high, material temperature adjustment scope/range narrow, process property 差, PET injection shot molding material temperature high, 螺桿剪切太 large or speed fast 时均容 easy generate aldehyde 而导致 acid 化.

        针 for PET以 and PET preform requirements fast, uniform features,螺桿塑化 good, stability property high, viscous material, speed degree fast, preform bottle formed rate high. can molding generally plastics. need attention/notes in large generally production in made PET preform add water material, in 此情况 lower 则PET specialized 螺桿并不 is very suitable, 反之普通螺桿镀铬 more is combined 适. has necessary in in add anti plant/unit.

        PA6/66/46/6T specialized 螺桿钉:

        PA is low viscosity crystallization property plastics, high temperature, melt speed degree fast, lubricated property good, flow property good water property easy 流涎, temperature degree easy cold 头, wet property large easy add material 段螺槽, color difficult.

        螺桿 pressure shrink ratio large, precision, mixed color good, material amount stability, efficiency high,排 gas good. generally in 间直径, molding PA, PP, LCP and other crystallization type low viscosity plastics good, can molding generally plastics. for/regarding PC, PMMA flame retardant ABS and other high viscosity and heat stabilized property plastics suitable (in temperature degree high, separation understanding), molding POM has necessary electroplating hard 铬. 射咀恒 temperature add hot most good, necessary add anti plant/unit.

        PPO specialized 螺桿:

        PPO non crystallization material, difficult melt, easy 滞塞, for 剪切敏感, easy degradation.

         recommendation use di alloy improve/increase wear resistant, corrosion resistant property, C grade can, add material 顺畅, generate pressure stability.

        PBT+GF specialized 螺桿:

        PBT saturated and resin, semi crystallization material, melt degree high, crystallization speed solid fast, easy separation understanding, for pressure 敏感以 and add glass fiber.

        必 must use di alloy improve/increase wear resistance, according to add amount, has C, B, A三 types engineering and other grade can 选, generate pressure stability. molding PBT+GF,

        PA+GF and other crystallization type low viscosity engineering plastics good.

         large 理石纹 specialized 螺桿:

        两 types solution/scheme: A: need more large 理石纹效果螺桿;B: more large 理石纹螺桿 material tube/pipe sleeve/set, control electrical 脑修改程式 or add electrical outer 挂.

         electrical 木, specialized material tube/pipe 组:

         material tube/pipe use hot 油回圈式 add hot, recommendation C grade di alloy;旧 plastics machine can made formed electrical injection shot mixing/compounding add strong/high mixed color 效果; mixing/compounding is separation 胶头 另一 design, main/primary add strong/high mixed color 效果,但 use has below/following made: 会引起熔胶时 back pressure increase large;熔胶 time growth;不 suitable for degree high plastics, 如PMMA, PC and other. 如客户 for mixed color 不满意 generally can increase large back pressure and decrease low 螺桿转 speed, has 一定 效果出现. 如客户不愿 use mixing/compounding add mixed color 效果, also can using/adopting type 射胶介子.