The thickness of a product - be it film, paper or nonwoven - has a direct influence on its quality. In the case of packaging material, for example, parameters such as air permeability and tear resistance must be exactly right. Otherwise it cannot fulfil its task of protecting products from external influences and guaranteeing their integrity. However, this can only be achieved if the material thickness is exactly as specified - and this for each individual production margin.
While homogeneous, reliable and functional products are a necessity for the quality standards required by customers, they have another advantage. High quality goods that exactly meet the specifications reduce production costs. You save raw material and energy by measuring and controlling the web thickness of the material.
Thickness measurement of fabric webs
Web thickness measurement
Our thickness measurement solutions guarantee our customers high quality goods while increasing the efficiency of the production process. The traversing quality measuring system Qualiscan QMS records the desired parameters and provides real-time feedback on the values. Thus, defects can be corrected immediately. Depending on the application and condition of the product, we provide the appropriate sensors.
Sensors for thickness measurement
Calipro DMS
Measurement of thickness (contactless)
Measures the material thickness of the product using a light curtain.
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LED micrometer
Calipro DMS measures the material thickness of the product using a light curtain. It is insensitive to colour, transparency and opacity as well as largely independent of the material surface.
Product Highlights
- High profile resolution
- Material-independent (colour, density, components, etc.)
- Contactless, wear-free measurement
- No calibration effort
- No radiometric measurements
Customer benefits
- Quick process optimization
- Material savings
- Quality assurance
Some areas of application in thickness measurement are difficult to cover with classic laser measuring systems. These systems reach their limits if the material surface is structured, rough, very smooth or glossy. Laser triangulation is not suitable either with multi-colour, transparent or opaque materials.
This is where the Calipro DMS LED shading sensor comes into play. The combination of eddy current sensor and shading sensor makes the measurement insensitive against material surface, colour, transparency, opacity and temperature variations.
Applications
- Film and sheet extrusion
- Nonwoven
- Textile
- Converting
- Calendering
Materials
- Mesh
- Nonwoven, foam, film
- Film and paper combinations
- PVC floor covering, entire range of colours
The light of a LED is directed as uniform, parallel light beam onto a measuring object. The transition between the bright and dark area at the receiver is detected as measuring value. Depending on the material thickness, a certain area is thus shaded at the detector. The eddy current sensor measures the current roller position.
The material thickness is calculated from the difference between eddy current sensor and shading sensor.
