塑料中冷器学习资料国外 中冷器在工程塑料中的应用.ppt
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1、GID/WIT,Fluid-assist molding makes integrated media ducts,Potential applications for fluid injection molding,GIT vs WIT,GIT- Gas injection technique Advantage: To avoid or minimize warpage and sink marks To reduce material consumption Integrate components Limitation: Long cooling and cycle times A l
2、imit on part diameter The lower level of heating elimination Pock-marked surface,WIT- Water injection technique Advantage: To avoid or minimize warpage and sink marks To reduce material consumption Integrate components Lower cooling and cycle times Disadvantage: Investment is higher,Why WIT?,Cycle t
3、ime Up to 50% shorter cooling time Part is cooled externally by the mold Part is cooled internally by the water Greatest benefit - water continuously flowed through the part Thinner walls More of the molten center of the part is cored out Smoother interior surface appearance Unfilled resins and low
4、levels of fiberglass Highly dependent on the composition of the resin Less Slide Action in Tool,BASF Ludwigshafen WAIM Unit,Flow rate 27 l/min Max. water pressure 210 bar Control of several mold functions (needle shut-off, core pullers, injectors, .) Module manufactured by PME fluidtec, Sasbach,Main
5、 players,Alliance Gas SystemsUSA PME Fluidtec Germany Maximator GID-TechnikGermany Cinpres Gas Injection-UK Battenfeld Engel IKV Arburg Milacron Ferromatik,Injector technology,Injector technology drain pin,Results (door handle mold),BASF test mould for tubes,injector,35,overflow 1,20,25,over- flow 2
6、,locking device,*) cooperation of TiK, Zipfel Formenbau, BASF,gate,BASF test mould housings with channels,Application: housings with an integrated channel for fluids,Middle part of the platen can be exchanged,Further BASF test mould for WIT,Water injector with hydraulic locking-device,Overflow,Hot r
7、unner,Injector for water removal,Locking pin for overflow,K5 (plate with rib),Further BASF test mould for WIT,Overflow,Runner,Drain pin,Water injector with hydraulic locking-device,Locking pin for overflow,Rear Wiper Arm,Processing sequence,Injection of melt,Processing sequence,Injection and holding
8、 pressure,Processing sequence,Opening of overflow Switching off hydraulic pressure on water injector,Processing sequence,Injection of water,Processing sequence,Injection of water,Processing sequence,Injection of water,Processing sequence,Decompression of water,Processing sequence,Removement of water
9、 by compressed air,Test Results with “Rear Wiper Arm” Ultramid B3GM24 black 23228,Test results with “Rear Wiper Arm” Ultramid B3WG6GP schwarz 23210,WIT Modifications on ADAC Mold Door handle molded in Ultramid B3GM24,Water injector with hydraulic driven locking-device,Locking pin for runner,Locking
10、pin for overflow,Drain pin,procedures versions for WAIM,1.,2.,3.,4.,Injection phase,Water injection,Water holding time,Water reverse flow,Short shot process,procedures versions for WAIM,1.,2.,3.,4.,Full shot process (flush process is possible),Injection phase,Water injection,Water holding time,Water
11、 reverse flow,procedures versions for WAIM,1.,2.,3.,4.,Injection phase,Water injection,Water holding time,Water reverse flow,Melt push back process,procedures versions for WAIM,1.,2.,Injection phase,Water injection,Core pull process,process schema Water assisted injection molding,water,melt,injector
12、,combined process Gas/Water assisted injection molding,Quelle: TiK, Freiburg, www.tik-center.de,water,melt,injector,combined process Gas/Water assisted injection molding,combined process Gas/Water AIM equipment set up,External tank,Injector,Drain pin,nitrogen,overflow,feed channel,downspot / drain,N
13、on return valve,WIT- Unit,M,Effect of process on the surface finish Ultramid B3GM35 black Q642,WIT,GID,GID / WIT,4,2,2,9,3,2,Typical WIT problems,WAIM channel surface,Ultramid A3HG6 WIT hydrolysis resistance,Impact strength,immersion,Time of immersion,Minimum requirements,Ultramid A3HG6 WIT hydrolys
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