Founded in 1969, Stamperia Olonia is now an integral part of the Liberty Group and has been a leader in printing on natural fabrics for home textiles and clothing fabrics from the very beginning. New technologies, high quality, innovation and certifications are Olonia's ingredients for further growth.
This is why the printing specialist has also equipped several stenter frames and printing lines with systems from Mahlo. This helps to produce a high and continuously consistent quality. At the same time, Olonia saves costs and resources and can document and improve its processes.
Images courtesy of Stamperia Olonia, Italy
On an production line, an Orthopac RVMC-15 controls the distortions at the infeed. (Olonia / Italy)
An MMA-15 drive station above the straightening machine provides support when feeding into the system. (Olonia / Italy)
Here is the scanning unit of the Orthopac RVMC-15 in detail. The scanning heads are automatically moved to the fabric width. (Olonia / Italy)
Flat bed printing & Rotary printing
Stamperia Pezzoli offers printing and finishing services for textiles for more than 35 years, maintaining the highest quality standards in every step of the manufacturing process and ensuring a highly competitive service in terms of technology and styling. Stamperia Pezzoli's finished textiles are used worldwide mainly for furniture and linen in households, hotels and hospitals. They are also used in the shipping industry and in the outdoor sector.
Pezzoli relies on Mahlo technology for straight-thread fabrics as well as process control and quality control during the finishing processes on the stenter frame. In the installation shown, a combination of Orthopac weft straighteners at the inlet and outlet of the stenter frame ensures perfect straightening results. For the best printing results, the Patcontrol system also monitors the pattern repeat and pattern distortion. The parameters in the stenter frame - dwell time, exhaust air moisture, residual moisture, fabric width - are monitored by the Optipac process control system.
Images courtesy of Stamperia Pezzoli, Italy
Stenter frame with Orthopac weft straightener at the inlet and outlet. A Patcontrol PCS also scans pattern distortions. The Optipac process control controls the dwell time, exhaust air and residual moisture. (Pezzoli / Italy)
A Patcontrol PCS scans for pattern distortions at the inlet and sends control commands to the weft straightener. (Pezzoli / Italy)
At the inlet, the Orthopac RVMC automatic weft straightener supplies the stenter frame with straight fabric. (Pezzoli / Italy)
The Ortopac RVMC uses skew rollers and bow rollers to correct skew and bow distortions in the fabric. (Pezzoli / Italy)
Exhaust air humidity sensors in the Optipac VMC measure and control the exhaust air humidity in the stenter frame. Excess moisture escapes, leaving the energy required for drying or fixing. (Pezzoli / Italy)
Hidden in the stenter frame, Optipac VMC sensors measure the surface temperature of the fabric and control the dwell time / fixing time. (Pezzoli / Italy)
Sensors at the stenter frame outlet measure the residual moisture of the fabric and adjust the system if the value is too high or too low. (Pezzoli / Italy)
The Wilot WMR width measuring system from Mahlo records the fabric width as it passes through the stenter frame. (Pezzoli / Italy)
An Orthopac FMC logs the residual distortion values at the outlet of the stenter frame and sends control pulses to the straightening machine in the infeed if necessary.
The pattern distortion at the stenter frame outlet is also logged with the Patcontrol PCS and, if necessary, control pulses are sent to the straightening machine in the infeed. (Pezzoli / Italy)
Ecomat AML
Control of exhaust air humidity
The exhaust air humidity sensor measures the proportions of oxygen, water vapour and harmful gases in the stenter frame.
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Measurement of steam
Much unused energy is wasted through the exhaust air during drying processes without appropriate control. The Ecomat AML optimises the heating energy required by monitoring charging of the exhaust air with water steam and controls this factor through the fan speed or the exhaust air vent control.
Product Highlights
- Highly accurate measurements
- Unaffected by carrier gases
- Measures oxygen, water vapour and harmful gas proportion
Customer benefits
- Optimises energy balance
- Saves energy
- Increases process repeatability
Large amounts of hot air are used to permanently evaporate new water (humidity), thus transporting the resulting mixture of hot air and water vapour out of the dryer. This mixing ratio is very important for the economy of the entire drying process.
The amount of water to be evaporated during any period of time depends on the product weight, incoming and residual moisture, product width and transport speed. A constant fan speed or exhaust air flap position is not economic. The exhaust air humidity needs to be constantly measured and the setting of the fan speed or exhaust air flap setting automatically regulated.
- Textile finishing
- Stenter frame
