BWQ 5000
Measurement of the Material Distribution with the Inline Weight Per Unit Area Gauge
A high product quality is ensured by the GreCon Weight Per Unit Area Gauge BWQ 5000 while the use of raw material and energy is optimised. The exact spreading of a mat considerably influences the properties of particleboard, MDF and OSB board.
Inline Weight Per Unit Area Measurement with X-Ray Technology
A high product quality is ensured by the GreCon Weight Per Unit Area Gauge BWQ 5000 while the use of raw material and energy is optimised. The exact spreading of a mat considerably influences the properties of particleboard, MDF and OSB board.
The optimisation of material consumption is the main goal of using a BWQ 5000. High material and production costs can be reduced by reducing fluctuations in spreading. Additional savings can be achieved by reducing the nominal weight on the basis of reduced fluctuations. The material distribution of loosely spread or pre-pressed wood-based mats is monitored by the BWQ 5000. To achieve consistent panel quality while the use of material and energy is optimised, graphical and numeric representations are available for the operator to adjust the forming process. An optimum production flow is ensured by the permanent monitoring of the mat distribution across the production direction prior to the main press; additionally, belt tracking caused by imbalances in the mat is prevented. Overspreading, especially at the mat edges, is monitored.
Weight per unit area data is recorded and logged, and continuously pictures production processes.The measured data can also be transferred to higher-ranking control systems for process optimisation.
Your Benefit
Fast traverse movement - quick and
strip-wise measurement of the cross
profile
= quick intervention in the production
process possible (e. g. adjustable tables
of the forming belt)
Measurement of the longitudinal profile = detection of systematic distribution failures lengthwise/crosswise
Safe x-ray system, operation permit is easy to obtain
Automatic calibration = best quality of measured values
Fast amortisation
Measuring Principle
For non-contact measurement with the weight per unit area gauge, an x-ray source is installed below, and a high-precision sensor above the material. The measure for the weight per unit area (kg/m² / lbs/f²) is calculated from the absorption of the x-radiation - depending on the specific density and the amount of the material.
Automatic Calibration
The quality of the measured results essentially depends on constant conditions during measurement. For reasons of quality, the BWQ 5000 is calibrated at regular intervals and in several steps to take, above all, the changing physical and process-related influences into account.
Operation Modes
The GreCon Weight Per Unit Area Gauge BWQ 5000 can be operated in three modes. For the measurement of the material distribution across the production direction, the cross mode is selected. Measurement is done in both directions. Special zones can be analysed more precisely to determine the longitudinal profile in stationary mode at a certain position. An automatic analysis of several positions is also possible. Time interval or certain points on the mat are predetermined in the recipe.
Construction of the System
The measuring unit is moved by a variable-speed A.C. frequency converter and gear motor. The basic construction of the traversing weight per unit area gauge consists of a solid aluminium frame. The profile of the frame was developed especially for the BWQ 5000.
All driving elements are integrated in the profile. High-quality rails for the top and bottom measuring slides ensure precise guidance. The two measuring slides are driven by toothed belts, which are linked with the motor via a divided spacer shaft and a safety clutch.
Software
The visualisation software of all GreCon measuring systems is based on Windows®. The software of the traversing Weight Per Unit Area Gauge BWQ 5000 consists of different program modules as well as an SQL data base:
The core of the software package is the visualisation software. It records all measured values and processes them graphically. The clear menu structure makes an intuitive operation possible. Clear parameters and detailed graphics enable the operator to quickly and effectively intervene in the running production process.
Measurement can be effected in three different operation modes. The mode determines whether the profile is represented as cross profile, as longitudinal profile or as a combination of both profiles. Out of tolerance limits are clearly marked with changes in colour in corresponding graphics. At the same time, tolerance relays with voltage-free outputs are activated.
Recipes that have been determined once can be easily called up again via the recipe management. Furthermore, changes in recipe can be activated by higher-ranking systems.
For the data transmission to higher-ranking process control systems, different network connections, such as OPC or ODBC, are available.
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Infomaterial
