热传导辊通过辊内冷却液流动或循环加热提供温度控制。 辊的设计及内置螺旋槽的构造是非常重要的。 很多的热动力学和机械因素都要考虑进去。
BEP 可以针对辊的设计和生产方法为您提供建议, 以确保您获得最优的性能和效率。
COPPER SHELLED CHILL ROLLS HAVE THE CAPABILITY TO PRODUCE MORE PRODUCT FOR THE SAME FLOOR SPACE, USE LESS ENERGY AND SOLVE CONDENSATE PROBLEMS.
HIGH EFFICIENCY COPPER CHILL ROLLS
BEP has more than 250 high performance copper chill rolls in circulation around the globe.
Many of the world’s leading laminators, cast film producers and high quality textured paper manufacturers have chosen to invest in our rolls because they produce higher quality products, at greater speed, using less energy.
In 2002, we observed that our clients were unable to operate their production lines at optimum levels of performance due to the inherent limitations of both steel and aluminium chill rolls. This led us to design our first copper chill roll product.
We are experts at electroforming high quality, seamless copper tubes to any thickness our clients specify. Our unique method of manufacture delivers the best combination of heat transfer and roll rigidity.
With coppers anti – corrosive qualities and high thermal efficiency, our rolls were a natural choice for companies who wished to increase their line speeds, improve their product quality and reduce their operating costs.
An additional unforeseen benefit of selecting copper shelled chill rolls was that our clients became able to reduce their capital expenditure on other components within their manufacturing lines.
BEP’s unique proposition allows us to replace an outer steel shell with a fine grain electroformed copper shell, up to 20mm thickness depending on application, which we then shrink fit over stainless steel guiding spirals welded to an inner core. This provides great strength and enhanced resistance to deformation.
WHY USE COPPER?
We use copper because its thermal coefficient of heat transfer is 10 times that of steel. This means that during the time the copper shell is in contact with PE it can absorb up to 10 times more heat. This can dramatically reduce the contact time compared with steel rolls, hence allowing the line to operate at greater speeds.
CHILL ROLL COOLING ENERGY SAVINGS
Engineering experts have confirmed that for every 1°C increase in cooling water temperature, a 5% saving in energy costs can be delivered. Therefore a copper chill roll operating at 20°C can deliver the same performance as a steel roll operating at 10°C, whilst still offering you the potential to reduce your refrigeration costs by up to 50%.
Operating chill rolls at 20°C also means that in high humidity climates, condensation does not build up on the cold ends of the roll, thus reducing product waste.
压延辊用于压延 或 “平滑” 和用于模压、层压、涂层、拉伸、抛光、压纹。
我们的压延辊可以由单一或双壳设计和硬化约 54Rc。 辊体是由42 CrMo4 钢经回火、应力释放和硬化制成。 辊通常在BEP工厂镀铬，表面是超级镜面。
热镀铬辊用于塑料行业通常需要热处理, 去除铬上的氢。 如果处理不当，透过铬，氢能渗透出来导致塑料薄膜或片材上出现小气泡。
为客户节省在使用之前预热辊的生产时间, 我们可以将辊在一专门构建的温度控制的烤箱中。 我们可以精确控制辊的加热温度并和记录温度配置文件数据。 在热处理过程中的辊是垂直挂起, 以消除任何可能出现的失真。
BEP 已开发了一种内部使用的热力学模型的工具, 帮助我们的客户更好地了解如何为其产品在接触辊时是如何进行加热或冷却的。