英语翻译请高手把下面有关的材料帮忙翻译下,急用7Hot-RunnerInjectionMoldsHot-runnerinjectionmoldsaregainingincreasinglymoreimportancebecauseoftheirprofitability,astheyallowfastautomaticcycling.Theadvantagelies

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英语翻译
请高手把下面有关的材料帮忙翻译下,急用
7 Hot-Runner Injection Molds
Hot-runner injection molds are gaining increasingly more importance because of their profitability,as they allow fast automatic cycling.The advantage lies in the feature that sprues and runners are eliminated and the plasticizing and injection capacity of the injection-molding machine can be fully utilized.
The liquid melt is conveyed from the sprue bushing to the cavities via runners.The melt has to be kept warm all the time so that it remains liquid and is available for the next injection sequence as soon as one is finished.The volume of the runners must be matched to the shot volume and the cycle time to avoid an excessive dwell time in the hot-runner channels.
Heating is usually by heater cartridges,which are rigid,or by heating tubes,which are flexible.The heating cartridges can have a watt density of up to 60 watt/cm2.Due to their excellent heat transference they can be fitted into hot-runner blocks in bores of tight tolerance.The distance between hot runner and heater cartridge should be at least 10 mm to avoid overheating of the plasticized material.
Figure 29 shows the layout of a hot-runner mold with heated runners.The manifold block (a) houses the heater cartridge (b),the distribution nozzle (c),the thermocouple (d),the sprue bushing (e) and the runners (f).The external shape and size of the manifold block — whether round,square or star shaped — depends entirely on the position and number of injection points.The individual heater cartridges (b) are connected to a junction box and divided into several heating circuits on larger tools.The energy requirement must be adequate to keep the melt in the runners If) and in the plasticized sprue bushing up to the tip at the molding cavity.The plugs (g) in the ends of the runners are profiled to facilitate material flow,as the material is diverted by them.This is important because “dead spots,” which could house burned material,must be avoided.
The heat-conductive core (h) built into the manifold nozzle (c) has been manufactured from good heat-conducting material,e.g.,beryllium-copper.It forms a hollow space (i) with the surrounding nozzle,which is filled by plastic melt forming a heat-insulating layer.

Answer 1

热流道注塑模具热流道注塑模具上占有越来越重要的,因为它们的盈利能力,因为他们允许快速自动循环.的优势就在于这一特点浇注选手被淘汰,塑化和注射量的 射出成型机,可充分利用.液态熔融传达来自spruebushing的蛀牙途...