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Plastica

Correzione durante la produzione

 Indipendentemente dallo spessore delle pareti dei preformati o delle bottiglie in PET, lo spessore delle pellicole durante la produzione e l'imballaggio deve essere determinato in modo preciso – con i sensori CHRocodile non ci sono problemi. Eventuali variazioni nel processo di produzione possono essere immediatamente rilevate grazie alla misurazione rapida e senza contatto. L'elevata velocità di misurazione consente di intervenire sui comandi durante la produzione. I nostri sensori si sono rivelati estremamente utili nella misurazione topografica di pezzi stampati a iniezione e nella misurazione dello spessore di blister (PET, PP, EVOH) presso rinomate case produttrici.

Applicazioni
CHRocodile K
Thickness measurements of foils

Welded seams in plastics must often undergo non-destructive tests. This may be the case in medical applications, such as multi-chamber pouches. Also the connection between the pouch and hoses and connectors can also be joined with welded seams. Quality and reproducibility can also be tested by the thickness of the welded seam.

Al prodotto
CHRocodile LR
Measuring air gaps and film thicknesses in production processes of technical polymers and PET

Technical polymers, such as Cyclo-Olefin-Copolymers (COC), are amorphous and therefore transparent, unlike partially crystalline polyolefins. As a result, they are particularly suitable for unilateral, contact-free thickness measurements by optical sensors. Low twin refraction properties are important for optical applications. Outstanding biocompatibility and extremely low water absorption/ water vapour permeability must be emphasised in the field of medicine and diagnostics. COC products are optical window films for flat screens as well as syringes, microtitre plates, cuvettes and flasks. In production, Precitec sensors measure the thickness of air gaps and layer thicknesses.

CHRocodile sensors are also used in coating processes by polymethyl methacrylate (PMMA, acrylic glass or Plexiglas). They can also be used in inline processes (roll to roll) to measure layer thicknesses (in the low micron range) on Polyethylenterephthalat (PET), unlike sensors with a low sampling frequency. 

Al prodotto
CHRocodile S / SE
Measuring the thickness of plastics or plastic coatings

Polycarbonates are coated to increase scratch resistance or UV resistance, for example. The coating and the material thickness can be measured by optical sensors without the sensors coming into contact with the items. Polycarbonate, a transparent plastic, is often used as an alternative to glass. Compared with brittle glass, polycarbonate is lighter and considerably more shock-resistant. Its negative properties, such as scratch-resistance or UV resistance can be reduced by coatings. For example, polyurethane acrylate layers of a few microns can be measured with the CHRocodile SE sensor.

The same also applies to EPDM. This is ethylene proplylene diene monomer rubber (cellular rubber). It is used for various seals, such as O rings for slide ring seals and for hoses, for steam or hot water, because it is highly flexible and has good chemical resistance. A confocal sensor can detect undesirable corrugation in the material. 

Al prodotto
CHRocodile LR
Micro lens arrays

Chromatic confocal sensors can measure the shape of micro lenses and thus help to detect surface defects. Optimised shapes are important for a distortion-free image and optimum light output. Lens arrays of cylindrical, aspherical or spherical lenses are made of highly refractive and highly transparent glass. Contact-free measuring systems using chromatic confocal sensors prevent damage to the lenses from tactile measuring sensors and enable a three dimensional surface image of the lens system. The curvature radius of the lenses can be determined. The sensors create highly significant 3D data. 

Al prodotto
CHRocodile 2 IT TW
Measuring layer thicknesses of food packaging films

Multiple layers can be measured by the CHRocodile IT-TW using interferometric thickness measurements with infrared light. This is the case, for example, with multi-layer food packaging films where the adhesive layer thickness is important. Places without adhesive can be detected in this way. In this way the thickness of films that are not transparent to white light can be measured. Even the individual layer thicknesses of multi-layer films can be measured if the refractive index of the materials is different.

CHRocodile K
Inline wall thickness measurement of artificial casings

The product to be measured is an artificial casing made of collagen. This is used as a natural skin for sausages. The material has a rough surface. This is made from a by-product of leather production and is known as a hide fibre sleeve. Here the ability of the measuring system to transfer continuous measurements to the measuring head quickly and therefore to measure strongly vibrating films is impressive. Without this measuring option the measurements must be taken using a much more inaccurate tactile process by determining the weight. This is much slower. The CHRocodile K sensor supplies high quality thickness values with this semi-transparent film that appears uneven and full of fissures according to the measurement results. 

Al prodotto
CHRocodile K
Measuring the wall thickness of plastic moulded parts

Plastic moulded parts, such as cuvettes or pipettes, can be measured without contact with an interferometric measuring system. Wall thicknesses can be determined in this case directly with the optical probe and a spacer on their own if no measuring machine is available.

Al prodotto
CHRocodile S / SE
Misurazione della topografia su pezzi stampati a iniezione

I pezzi stampati a iniezione possono essere varia natura - sia che si tratti di forma, colore o superficie. Un sistema di misurazione della topografia deve tenere conto di queste condizioni marginali e fornire valori sensati. Il sensore CHRocodile SE in combinazione con le teste di misurazione ottica con apertura elevata soddisfa perfettamente questi requisiti. Può essere utilizzato su tutte le superfici, per quasi tutte le geometrie di componente ed è insensibile agli influssi ambientali. La precisione di misurazione e la risoluzione laterale rientrano nel campo µm, la risoluzione assiale nel campo sub-µm. Inoltre CHRocodile SE offre frequenze di misura impressionanti pari a vari kHz! Ma a cosa servono valori così impressionanti senza la possibilità di una facile integrazione nell'ambiente di processo? Anche questo problema è stato risolto. La sincronizzazione con l'hardware esterno è infatti garantita da una serie di interfacce che rispondono agli standard industriali attuali.

Al prodotto
CHRocodile K
Thickness measurements of foils

Thin transparent and non-transparent films are typically produced at high speeds, under demanding conditions. Because of this, a more robust sensor must be utilized to determine the film thickness during production. The measurement technique can not be affected by environmental parameters such as temperature, humidity, or vibration of the film. The CHRocodile K, with its interferometric measurement method, meets these conditions perfectly - all while combining the highest precision and speed. This allows the process parameters of film production to be controlled with minimal latency.

Al prodotto
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