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 DML
Measurement of thickness (contactless)
Laser triangulation
The Calipro DML optical system uses laser triangulation online to measure the thickness or coating thickness of various materials with the highest accuracy.
Product Highlights
- Non-contact, non-destructive and ultra-precise measurement online of product thickness
- Available in several configurations to suit various requirements in terms of accuracy
- Can gauge either at one side against a reference roller or on both sides
Customer benefits
- Determines the thickness of a web or sheet directly without reference to product density
- Since the gauge is able to traverse, it indicates the thickness of the product from edge to edge
- Non-contact measurement has no adverse effect on either product quality or the manufacturing process
- Paper and cardboard industry
- Nonwoven sector
- Manufacturing of PVC flooring
- Calendered or extruded plastic webs and sheets
- Manufacturing of artificial leather
In principle, the two-sided, non-contact, laser-type thickness gauge can be used to monitor virtually any product in web or sheet form. Successful applications for this technique can be found in the paper and cardboard industry, nonwoven sector, plants manufacturing PVC flooring or other calendered or extruded plastic webs and sheets, and in the manufacture of artificial leather.
Either one or two laser-triangulation sensors determine the exact distance between the gauging sensor(s) and product surface, either from one or both sides.
Depending on the arrangement, an additional sensor, usually a high-precision eddy-current sensor, determines either the distance between the two gauging sensors or distance between the one sensor and a reference roller.
Specification | Value | Unit | |
---|---|---|---|
Type | DML-S (single sided) | DML-D (double sided) | |
Measuring range 1 | 20 - 80 | 10 - 100 | mm |
1) depending on variant