The butyl extruder LBH-B25ARS combines the latest metering technology with well-proven principles and decades of LiSEC expertise in the automatic butylation of fixed spacer frames.
How is the butyl extruder constructed and what frame sizes are possible?
The butyl extruder LBH-B25ARS is subdivided into inlet, coating and outlet zones for processing spacer frames up to a max. size of 2500x2500mm.
How does the butyl extruder work with fixed spacers?
After the measurement of the spacer frame in the inlet area, both sides are evenly coated with butyl using a combination of horizontal and rotating movements. The butyl is applied in a CNC-controlled, high-precision, dynamic metering process. This ensures that the desired g/m quantity of butyl is applied to each section of the spacer frame with an application accuracy of ± 5% without interruption to the application of the butyl.
How exactly is the butyl applied?
The butyl quantity can be set for both for the straight areas and the corner areas of the frame independently from one another. In doing so, the movement dynamics can be adapted to the frame size and frame material. This guarantees an exact application of the butyl, particularly in the corners, even with unstable frame types. The seamless and automatic nozzle height adjustment enables precise positioning of the butyl on the side surfaces of the spacers as well as an exact adjustment to different corner radii. In addition, the glass contact surface is increased through the unique nozzle geometry which in turn also improves the effectiveness of the primary seal of the insulating glass.
Processing Georgian bar frames
Georgian bar frames can also be processed with the help of special retaining rollers and adaptive grippers. In addition, an extra swivel can be activated to adapt the frame alignment at the outlet before the coating process.
Who is the LBH-B25ARS suitale for?
This system is for insulating glass manufacturers who attach major importance to fully automatic spacer butylation of the highest quality.
What advantages does the machine offer?
Due to its adaptive control and precise nozzle height adjustment, the system guarantees precise and regular butyl application. The position of the butyl cord can be precisely adjusted to the different corner radii, therefore always guaranteeing an optimum glass contact surface.
Butyl application of 1.5-4.5g/m is possible with an accuracy of ±5% with no interruption of the butyl application, thanks to the precise, volumetric metering. In doing so, the application quantity can be separately set for the straight sections of the frame and for the corner areas. The glass contact area of the butyl and therefore also the effectiveness of the primary seal are increased through the unique nozzle geometry.
The butyl extruder LBH-B25ARS has stepless and automatic nozzle height adjustment integrated as standard, enabling the position of the butyl application to be precisely defined. This enables the butyl application to be positioned such that air inclusions between the butyl and the edge seal can be avoided on the one hand, and so that butyl application in the visible area of the insulating glass unit can also be avoided. With an adjustment range of 2 - 8 mm, all of the most common spacers on the market are accommodated by the automatic nozzle height adjustment system.
The LBH-B25ARS metering system is equipped with a highly dynamic rotary slide valve with volumetric flow measurement, adaptive control, and controlled electrical material heating up to the nozzle tip. This means that new butyl materials can be easily taught in or, in the case of existing butyl types, the material fluctuations from batch to batch can be automatically compensated.
The 200 litre drum pump and the integrated material buffer guarantee operation without material-related downtimes. A special feature of this system is the extremely easy accessibility for cleaning and service purposes.