Shanghai Daoqin Plastics Co., Ltd.

一, hot runner history, in, future

    as is 一项先进 injection molding processing technology — hot runner technology, in USA 家 普 and use can to upper in 期甚至 more 早. due to hot runner tool has many advantages, therefore, in outer development comparison fast, many plastics mold production mold 50% above using/adopting hot runner technology, separation mold 厂甚至达 to 80% above, in China, this technology in year true positive and application. mold industry development, hot runner in plastics mold in use ratio/proportion 也逐步 improve/increase. 但总体不足10%, this versus large.

    in recent years, hot runner technology in China 逐渐推广, this very large degree upper is due to mold toward company export volume fast speed development belt/tape. in USA 家, injection molding production already 经依赖于 hot runner technology. can this 样说, has use hot runner technology mold in already very difficult export, this formed very more mold for/regarding hot runner technology upper 转变.

    due to very more outer Imported hot runner system price comparison 贵, inner very large separation 厂家接受不, therefore 就出现 一 Domestic hot runner system parts. this for/regarding hot runner technology in China has very large benefits. although hot runner technology already 经开始推广,但 has company use rate 达20% above, generally using/adopting simple 尖咀, 通咀. less company using/adopting tool has world water high difficult degree 针阀式 hot 咀, 但总体 upper hot runner using/adopting rate to 10%, and outer 50～80% versus 差太远.

    二, hot runner principle

    cold runner is mold and product gate between separation. plastics in runner inner injection molding pressure and its hot amount maintain flow 状态, runner as is molding material material separation, 但并不 belongs to product. therefore in design mold 时候既 need filling 效果, also need how to through shrink short, shrink small runner 节省材 material, 理想情况 is this 样, 但实际 application in very difficult to full its 美.

    hot runner also runner is in injection rear runner in plastics solid, plastics product demolding 时就不必 will runner in water 口脱出. due to runner in plastics has solid, therefore in lower one-time injection runner still 然畅通.

    brief 言之, hot runner is injection molding machine 喷咀 延伸.

    三. hot runner mold advantages

    hot runner mold in world industrial 发达国家 and to is application. this main/primary is hot runner mold has lower significantly features:

    1, shrink short made parts molding cycle

    has system cooling time made, made parts molding solid rear can and ejection. many use hot runner mold production thin parts molding cycle can in 5秒钟 below/following.

    2, plastics raw materials

    in pure hot runner mold in has cold 浇道, therefore production material. this for/regarding plastics price application project especially heavy large. upper, upper main/primary hot runner production 厂商均 in world upper and plastics raw materials price year to development. is hot runner technology is decrease/reduce material reduce material has 效途径.

    3, decrease/reduce product, improve/increase product quality

    in hot runner mold molding process in, plastics melt temperature degree in runner system to control.
plastics can more is uniform 一致 状态流入各 mold cavity, its is quality parts. hot runner molding parts gate quality good, demolding rear residual stress low, parts deformation small. therefore market upper very more high quality product hot runner mold production. 如人们熟悉 MOTOROLA手 machine, HP printing machine, DELL笔记本 electrical many plastics parts use hot runner mold made as.
    4, remove rear 续工序, has production 自动化.

    made parts hot runner mold molding rear is formed product, 无需修剪 gate and recycling processing cold and other 工序. has production 自动化. outer very more product production 厂家均 will hot runner and 自动化结 combined 起 以 large degree improve/increase production efficiency.

    5. expand large injection molding process application?围

    many plastics molding process is in hot runner technology upper development 起. 如PET预 molding made as, in mold in more color 共注, multiple material process, STACKMOLD and other.

    四. hot runner mold disadvantages

    tube/pipe and cold runner mold versus ratio, hot runner mold has many significantly advantages, mold use need understanding hot runner mold disadvantages. 概括起 has below/following 几点.

    1, mold cost upper rise

    hot runner parts price comparison 贵, hot runner mold cost can can large degree increase high. if parts output/production volume small, mold tool cost ratio/proportion high, upper 不花算. for many development China mold use 户, hot runner system price is effect/influence hot runner mold use main/primary issues 之一.

    2, hot runner mold made as process equipment requirements high

    hot runner mold need precision processing machine as ensure. hot runner system and mold formed and combined requirements is 严格, mold in production process in 会出现 very more heavy issues. plastics 密封不 good plastics loss bad hot runner parts in production, nozzle parts and gate versus for 位置不 good products quality heavy decline and other.

    3, as repair complex

    and cold runner mold versus ratio, hot runner mold as repair complex. use as 不当极 easy loss bad hot runner parts, make production method 进行, formed large loss 失. for/regarding hot runner mold new use 户, need relatively long time use experience.

    五. hot runner system formed

    tube/pipe world upper has many hot runner production and multiple hot runner product series, 但一 典 type hot runner system 均由如 lower large separation formed:

    1． hot runner sheet/plate （MANIFOLD）

    2． nozzle （NOZZLE）

    3． temperature degree control device

    4．辅助 parts

    六. hot runner application main/primary technology key/critical

    formed hot runner mold application project need more step/link 予以保障. its in most important has technology factors. is plastics temperature degree control, is plastics flow control.

    1． plastics temperature degree control

    in hot runner mold application in plastics temperature degree control is important.

many production process in processing and product quality
    issues 直接 源于 hot runner system temperature degree control good. use hot gate methods injection molding product gate quality issues, gate methods molding 时阀针关闭困 difficult issues, more type mold in parts filling time and quality 不一致 issues and other. if can can amount selection tool more separation temperature hot runner system, increase use active property and can force.

    ２． plastics flow control

    plastics in hot runner system in need flow balanced. gate need meanwhile make plastics filling type 腔. for/regarding parts weight versus 差悬殊 ＦＡＭＩＬＹＭＯＬＤ need 进行浇道 dimensions design balanced. 否则就会出现 has parts holding pressure 不够, has parts 却充模 holding pressure degree, flash large quality and other issues. hot runner dimensions design need combined 理. dimensions small pressure loss large. dimensions large hot runner large, plastics in hot runner system in time long, loss bad material property can 而导致 parts molding rear can meet/satisfy use requirements. world upper already has 专门帮助 use 户进行 most runner design CAE soft parts 如MOLDCAE.

    七. hot runner mold application scope

    1． plastics material types type

    hot runner mold already by formed used for processing various plastics material. 如PP, PE, PS, ABS, PBT, PA, PSU, PC, POM, LCP, PVC, PET, PMMA, PEI, ABS/PC and other. can use cold runner mold processing plastics material can use hot runner mold processing.

    2． parts dimensions and weight

    use hot runner mold manufacturing parts most small in 0.1克 below/following. most large in 30公斤 above. application is 广泛灵 active.

    3． industrial field/area

    hot runner mold in electronics, automotive, medical, day use product, toys, packaging, construction, office equipment and other industrial 部门都 to application.

    八.国际 upper hot runner mold production 简况

    in world upper industrial relatively is 发达 国家 and hot runner mold production is active 跃. hot runner mold ratio/proportion improve/increase. many 10人 below/following small mold 厂都进行 hot runner mold production. from upper 讲北美, Europe use hot runner technology time relatively 久, experience relatively more water relatively high. in 亚洲, remove Japan outer, new add 坡, 南韩, Taiwan, 香港处于领先 位. 北美, Europe although mold manufacturing water relatively high, price relatively high 交货期 relatively long. versus ratio lower, hot runner mold manufacturing in price and 交货期 upper more tool competition property. China hot runner mold 尚处于起步 stage/phase, is positive in fast speed growth, ratio/proportion improve/increase.