Shanghai Daoqin Plastics Co., Ltd.

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.

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:

• shrink short made parts molding cycle

因没 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.

• 节省 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.

• 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.

• 消 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.

• expand large injection molding process application 笵围

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 and other.

尽 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:

• 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.

• 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.

• 操 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.