Extrusion International 5-2019

25 Extrusion International 5/2019 Both side polished surfaces, polished/ embossed and embossed/embossed. In this way the machine is highly flexible. Thanks of the quick-exchanges device of the first and center calender roll, the machine can be fast converted for dif- ferent type of film. setting: The operation mode allows a precise and automatic adjustment of the gap, simply by changing the extrusion speed (pressure control mode). The operator changes the speed value on the touch screen in accordance with the new prod- uct thickness, and within a matter of seconds the product is set to the de- sired thickness. This is a clear advantage in terms of time and costs com- pared with conventional gap adjustment systems, which require the opera- tor to adjust the speed separately, after the gap adjustments have been implemented. How to avoid inside stress By the same system the operator can change be- tween distance control (setting the thickness) and pressure control mode on the fly. The pressure con- trole mode allows to set a specific gap pressure inside the roll gap. A too high gap pressure gener- ates too much stress inside the film. A disadvantage for optical film quaility as well as for the later ther- moforming process. A too much shrinkage might be occure and guides to waste of the produced parts. In conclusion with a FSR system (flexible shell roll) low pressure can be ap- plied to the film. In spite of the low pressure and due to the special FSR technology the film sur- face becomes perfect pol- ished. 3 in one The calender machine of- fers the production of three different kind of film in one: BREYER GmbH Bohlinger Str. 27, 78224 Singen, Germany www.breyer-extr.com Stand 9B60 • Throughput control and gravimetric blending systems • ŽŶƟŶƵŽƵƐ ŐƌĂǀŝŵĞƚƌŝĐ ƐLJƐƚĞŵƐ using the “loss-in-weight” principle ensure • Total 5 components • Max. output to 600 kg/h • WĞůůĞƚ͕ ƌĞŐƌŝŶĚ ĂŶĚ ĂĚĚŝƟǀĞ • To 4 auxiliary components with dosing screws • PLC Control with HMI 12“ High precision dosing technology ĨŽƌ ďƌŽĂĚ ĂƉƉůŝĐĂƟŽŶ K 2019: Hall 16, Booth C18