Extrusion Asia Edition 2-2017

14 信息縱覽 Extrusion Asia Edition 1/2017 ➠ MAGUIRE PRODUCTS, INC. www.maguire.com/product.php/328.htm 根据美奎产品销售和市场副总裁 Frank Kavanagh的说法，使用称重传感 器同样增强了对整个干燥过程的控 制。Kavanagh 先生说：“称重传感器控 制使得精确地匹配干燥率和注射模塑机 或挤出机的处理速率成为了可能，对于 技术型高分子材料比如尼龙，适度干燥 是尤为重要的。而由于采用了称重传感 器控制，保证了在生产停止时不会有原 料被残留在干燥机中，下一次的生产运 行可以立即开始。” VBD真空干燥机通过三个垂直排列 的分级干燥加工方式，物料在重力下移 动，物料从一级通过高速滑动阀门排料 到下一级，每次配料的精度为+/-4克。 用于三个加工阶段的容器从上到下依次 为：加热料斗，将树脂升温到目标温 度；真空容器，这里的真空降低了水的 沸点，导致粒子中的潮气挥发并从粒子 排出到周围的低压环境 ；加压保持/排 料料斗，由薄膜空气干燥器进行连续净 化，保持干燥的目标水平直到物料排 料。真空容器和保持料斗都安装了称重 传感器 。 VBD300干燥机有着直观的、易于 使用的触摸屏控制器，操作者能够通过 唯一的屏幕管理所有干燥参数。与美奎 所有的设备一样，新型干燥机享受5年 的质量保证期。 New Dryer n A new vacuum resin dryer enables more molding and extrusion processors to obtain the substantial advantages of vacuum dryers over conventional desic- cant systems, including lower operating cost, increased efficiency, and greater control over the drying process. The VBD™ 300 vacuum dryer from Ma- guire Products, Inc. achieves throughputs of up to 300 lb. (136 kg) per hour, which is double the capacity of the company’s VBD 150 model. While the VBD 150 is sized for the throughputs of many injec- tion molding machines and of small ex- trusion lines like those for medical tub- ing, the new VBD 300 model opens the benefits of vacuum resin drying to a broader range of applications. Maguire also offers the VBD 1000 dryer for high- volume operations. In comparison with desiccant dryers, the VBD vacuum dryer consumes 60 percent less energy, dries resin in one-sixth the n 新型真空树脂干燥机超越了传统的 干燥剂系统，更多的模塑成型和挤出加 工商将认识到真空干燥机的大量的优 点，包括较低的运行费用，效率得到提 高，以及对整个干燥过程有更多的控 制。 美奎产品有限公司（Maguire ）的 VBD™ 300真空干燥机可实现产量高达 每小时300磅（136kg），是公司VBD 150型号产品生产能力的两倍。然而 VBD150的生产能力是为了满足众多的 注射模塑机以及小型挤出生产线的需 求，例如生产医用导管的挤出生产线， 新型VBD300真空树脂干燥机在更为广 泛的应用领域为客户提供效益。对于更 大 产 量 的 生 产 ， 美 奎 同 样 能 提 供 VBD1000干燥机。 与干燥剂型干燥机相比，VBD真空 干燥机的能量消耗减少了60%，干燥树 脂所需要的时间为六分之一，大幅度减 少了聚合物滞留的累积热。VBD系统去 除潮气的速度快，这样就有可能适当地 对树脂进行干燥，冷启动后开始生产仅 需要35分钟。 与其他VBD型号一样，VBD300干 燥机采用称重系统，即采用称重传感器 在两个关键点精确地监视物料的重量， 从而能够对整个物料消耗和工艺条件的 记录文档精确地控制以利于客户检定。 新型干燥机 time, and substantially reduces the heat history to which polymer is exposed. The speed with which the VBD system re- moves moisture makes properly dried polymer available for production only 35 minutes after a cold start. Like other VBD models, the VBD 300 dry- er is a gravimetric system that employs load cells that precisely monitor the weight of material at two critical points, making possible precise control over ma- terial consumption and documentation of process conditions for certification to customers. Use of load cells also en- hances control over the drying process, according to Frank Kavanagh, vice presi- dent of sales and marketing for Maguire Products. “Load cell control makes it possible to precisely match the drying rate to the processing rate of the molding machine or extruder, which is particularly impor- tant for proper drying of technical poly- mers like nylon,” said Mr. Kavanagh. “And because load cell control ensures that no material is left in the dryer when production stops, the next production run can start immediately.” VBD vacuum dryers use gravity to move material through three vertically ar- ranged stages of the drying process, with the discharge of material from one stage to the next controlled by high-speed slide-gate valves with an accuracy per dispense of +/- 4 grams. The vessels for the three stages are, from top to bot- tom: a heating hopper that brings resin to a target temperature; a vacuum vessel in which vacuum reduces the boiling point of water, causing moisture within the pellets to volatilize and be forced out of the pellet into the low-pressure envi- ronment surrounding it; and a pressuri- zed retention / take-away hopper that is continually purged by a membrane air dryer to maintain the target level of dry- ness until the material is discharged. The vacuum vessel and retention hopper are mounted on load cells. The VBD 300 dryer has an intuitive, easy to use touchscreen controller that allows operators to manage all drying parame- ters from just one screen. Like all Maguire equipment, the new dryer comes with a five-year warranty. VBD™ 300真空干燥机 VBD™ 300 Vacuum Dryer