Shanghai Daoqin Plastics Co., Ltd.

        随 green environmental protection in full industrial production in 贯彻以 and production cost control 方面 考虑, plastics as is types property can excellent can recycled non metal material, by day 益广泛 application in industry parts design, manufacturing upper, metal parts 越 越 more by has 同样工 as property can plastics parts substitute/replace, meanwhile for plastics parts between welding technology and welding quality 也提出 more high requirements, this is light welding technology in plastics material field/area application provide machine.

        传统 plastics welding commonly used methods

        ● ultra- 声波 welding

         ultra- 声波 welding method through machine high frequency 振动而形 formed 接缝. assembly parts add pressure 夹持于振荡焊头 and solid 定焊头 between, rear and 接触面呈直角, frequency rate is 20～40KHz ultra- 声振动. 交替式 high frequency force in interface generate hot amount, from formed excellent welding.

         used for this process tool separation 昂贵, therefore, in production amount relatively large using/adopting. application areas in more machine upper welding medical device use and 筛检程序, box/case 体, automotive parts, device outer housing/shell and other.

        ● 摩 scratch welding

         thermoplastic property plastics scratch welding (也称 is “旋转 welding ”) and metal welding principle same. in this type of welding process in, will sheet/slice solid 定, sheet/slice 基材以受控 角 speed degree 旋转. parts pressure combined in 一起时, scratch hot polymer melt, cooling rear formed welding. scratch welding can generate excellent welding quality, welding process simple, heavy property strong/high, combined less has 一 部 parts is 圆形且不 need degree for application areas.

        ● 振动 welding

        振动 welding is property scratch welding. parts thermoplastic property parts in pressure, frequency rate and lower versus scratch, to generate hot amount make polymer melt is 止. 振动停止 rear, parts for 齐, polymer solid rear formed welding.

        此 welding process main/primary advantages in can high speed welding large type complex property parts. its it strong/high 项包括: can meanwhile welding more parts, welding tool simple, can welding has thermoplastic property material, main/primary used for automotive and use electrical appliances industry.

        ● hot sheet/plate welding

         for/regarding plastics combined 说, hot sheet/plate welding is most simple amount production technology. high temperature hot sheet/plate 夹于待接缝 surface between, to soft is 止. 此时, will hot sheet/plate 抽出, surface in pressure lower combined, maintain 一段特定 time rear combined in 一起. rear, let melt surface cooling, formed welding. welding tool or add hot parts has inner electrical hot device, 以避免 plastics viscous welding tool upper.

         multiple day commonly used product using/adopting this welding process, 例如: device outer housing/shell, machine and machine parts, made liquid 油箱, rear 灯, 指示灯 and other automotive parts. hot sheet/plate welding method in welding speed degree relatively slow.

        ● hot gas welding

         hot gas welding method utilizing add hot gas 流(usually is gas) will thermoplastic property plastics and thermoplastic property plastics strip/profile add hot and 熔化. and strip/profile melt rear formed 焊缝. is ensure has welding, must in strip/profile upper add temperature degree and pressure, also ensure combined welding speed degree and 焊枪位置. main/primary applications chemical product container, pipeline and automotive 保险杠 and other injection molding parts repair and other. nitrogen gas used for oxygen gas 敏感 材 material, polyethylene (PE); oxygen gas formed more high welding strong/high degree.

         this welding methods main/primary advantages in can welding large type, complex parts, is welding speed degree slow, welding quality full 依赖于焊工 技 can.

        ● 植入 welding

         in welding in, will metal parts in 待接缝 部 parts between, rear through or electrical retardant methods add hot. using/adopting electrical retardant welding 时, requirements 沿接缝放置 electrical will electrical 流传导 to parts in; using/adopting welding 时则不 need this type of methods. welding method already used for welding large type parts and other complex 接缝, automotive 保险杠, electric vehicles and 游艇船 housing/shell and other.

         plastics light welding

        ● plastics light welding principle

         most commonly used light welding by is light welding, will 两 待 welding plastics parts add pressure in 一起, rear will short outer 区 激 light toward to adhesion 部位.

        激 light through upper light material, rear by lower material absorption, light can amount by absorption rear is hot can, due to 两层材 material by pressure in 一起. hot can from absorption 层传导 to light upper, make 两层材 material 熔化并结 combined.

         meanwhile due to material hot expand generate internal pressure. internal pressure and external pressure function ensure separation solid welding. 图1, 图2直观 说明 plastics light welding principle and process.

        ● plastics light welding process

        (1)激 light long

         plastics welding process in commonly used is tube/pipe light device or semi 导体激 light device. light 束处于近红 outer 区域, and light long in 400～1,100μm, can through light 纤传输, in this scope/range inner light can by large more plastics absorption. tube/pipe light welding system 紧凑, and light device also can to more high grade 别 功 rate. light long can according to requirements design. semi 导体激 light device long generally is 808～980μm. semi 导体激 light device investment cost small, small, efficiency high.

        (2) plastics material

         thermoplastic property plastics 包含无定形 plastics and semi property plastics. can by light welding plastics belongs to thermoplastic property plastics. upper, has thermoplastic property plastics can by light welding. plastics light welding technology for by welding plastics requirements is: in hot function inner material, requirements for light light absorption property good;不 belongs to hot function separation material, requirements for light 波 透 property good, especially in for parts thin plastics parts 进行叠焊时 more is 如此. generally toward hot function plastics in add absorption agent can to 目.

        (3) absorption agent

         absorption agent application is plastics light welding process in non important process. plastics light welding essence is will hot function 区 待 welding plastics melt 化, rear cooling achieve plastics parts combined. let plastics melt need make plastics parts absorption 足够 激 light can amount.

         usually absorption agent is carbon 黑, carbon can will outer long light can amount basic full absorption, from large large improve/increase plastics hot absorption 效果, make hot function 区 材 material melt more fast, more good. other color material, can to same absorption light 波 效果.

        添 add absorption agent methods has 3 types: is toward welding material in absorption agent, this 样应该 will absorption agent plastics parts in lower 面, 而 没 has absorption agent plastics parts in upper 面, let light light through;二 is toward plastics parts welding surface absorption agent, this has by absorption agent separation plastics will formed is hot function by melt 化;三 is in block welding plastics parts 接触处 spray coating upper or printing upper absorption agent.

        (4) other parameters

         and metal welding different, plastics light welding need light rate is large good. welding light rate large, plastics parts upper hot function 区就越 large, deep, will 导致材 material hot, deformation, loss bad. according to need melt deep degree selection light rate.

         plastics light welding speed degree comparison fast, generally to 1mm thick welding speed degree can 达20m/min;而 using/adopting high rate CO2激 light device welding plastics film, most high speed degree can to 750m/min.

         plastics light welding application

         resin degradation less, generate less, welding process non 接触, generate 污染, light welding versus ratio its it methods generate machine force and hot force small, therefore especially combined 于鼠标, electrical 话, connectors parts and other processing precision electronics device parts, and need more methods complex parts, 例如含 has sheet/plate plastics products. automotive, medical, electronics, food and other industry is light welding application areas.

         automotive industrial: light welding plastics technology can used for manufacturing very more automotive parts, 如自动门锁, 无钥匙进出 equipment, nozzle, machine 架, machine device, 驾驶室 machine 架, liquid pressure 油箱, 滤架, front and and other. its it automotive application also 包括进 gas tube/pipe light tube/pipe manufacturing and water manufacturing.

        医学 field/area: light welding technology can used for manufacturing liquid 体储槽, liquid 体 滤 device 材, soft tube/pipe 连接头, 造口术 bag 子, device, 移植体, analysis use micro device parts and other.

         packaging industrial: high grade industrial made formed product packaging, using/adopting plastics film welding technology, can to processing high speed, can 靠, outer table/sheet plastics packaging. plastics outer packaging materials light welding 连接. plastics material is thermoplastic property plastics and 人造橡胶.

         electronics device parts product 封装: electronics device parts product technology for/regarding welding ring and process requirements non 常严格, low amount, low hot amount, strong/high 震动, 封装精 degree high, can resistant use, outer table/sheet and other. use material very large separation is plastics, therefore plastics light welding has very large application 空间.

        激 light welding plastics tool has low cost, 无污染, high speed degree, processing 方便, achieve precision 数控容 easy, Raw Materials suitable scope/range 广, combined property and process property good and other comprehensive advantages, plastics welding process research and plastics light welding equipment 逐步商 product 化, plastics light welding application will 越 越广泛, technology 越 越 formed 熟.