Extrusion Asia Edition 1-2021

的挤出速度值，可在几秒钟内将产品设置到所需的厚度。与 传统的间隙调整系统相比，这种功能在时间和成本方面具有 明显的优势，传统方式要求操作员在实施间隙调整后再进行 速度调整。 布勒尔提供完整的挤出系统，包括称重计量给料系统、 切边锯和横切锯以及堆码系统。 整个控制系统符合最新标准 ，而布勒尔 e-Portal为操作员提供了各种在线支持解决方案。 所有上述的这些特征使布勒尔挤出生产线成为真正的多功能 设备，并使操作员能够采用经济而灵活的方式生产板片材。 A lot of details and know-how was developed this way, inur- ing to the benefit of the customers' efficient and flexible production. In the range of crystal-clear sheets customers pro- duce worldwide highest quality, capturing new markets with first-class products. Meanwhile, the range of application for transparent sheet is huge. Architectural applications like huge buildings and giant stadiums, green house roofs and machine coverings on the one side and high sophistically applications like TV and computer screens, mobil phones and LED panels for illumination panels on the other side. Recently another application has been added to the picture: Sheet for the personal protection in offices, hotel receptions and supermarkets. To produce sheet for all this different markets and requirements the extrusion line must be like a multi tool. High performance on vented extruders To have also a good economical production result, the line starts with a vented single screw extruder with outstanding per- formance. As a pioneer on this field BREYER even successfully managed to process hygroscopic materials at high specific throughputs without the necessity of pre-drying the material. This way the time- and energy consuming pre-drying becomes obsolete. Changeover times related to material properties significantly can get reduced compared to conventional processes based on pre-drying technology; hence the entire extrusion line can get operated far more flexible and significantly more efficient. All BREYER extrusion lines processing high quality PC, PMMA and PETG sheet or even films for optical application do follow the undried and vented process. The melt will become optimal- ly degassed, a precondition for the production of first class sheet and films meeting highest quality demands of the world- wide market. One calender for 3 types of sheet surface To serve to the whole market the product line is able to produce three different kinds of sheet: mat and structured sheet as well as both side polished sheet with optical properties. Thanks of the quick-exchange-device of the first and center ca- 17 Extrusion Asia Edition 1/2021 ➠ Breyer GmbH Maschinenfabrik Georg-Fischer-Str. 40, 78224 Singen, Germany www.breyer-extr.com lender roll, the machine can be fast converted for different types of sheet. In this way the machine becomes highly flexible. Depending from the total output (kg/h) the calenders with three and four rolls with different roll diameters are available. Quick adjusting the flatness Flatness of the sheet is essential. By the BREYER calender with its slewable third calender roll is not anymore a matter of many minutes. By this feature the residential time of the sheet around the center calender roll is influenced. During running condition the position of the third roll in relation to the center roll can be changed, resp. adjusted exactly to this position where top and lower side cooling is balanced and the film becomes flat. Changing quick from one thickness to another The BREYER gap control system allows a precise and fast ad- justment of the gap, simply by changing the extrusion speed at the touchscreen (pressure control mode) especially for thinner sheet. The operator changes the speed value on the touch screen in accordance with the new product thickness, and within a matter of seconds the product is set to the desired thickness. This is a clear advantage in terms of time and costs compared with conventional gap adjustment systems, which require the operator to adjust the speed separately, after the gap adjustments have been implemented. BREYER offers the complete extrusion system including gravi- metric dosing systems, side-trim saws and cross-cut saws as well as stacking systems. The entire control system is according the latest standard, and the BREYER e-Portal offers different online support solutions for the operator. By all this described features the BREYER extrusion line be- comes a real multi tool and allows the operator to set up an economically and flexible sheet production.