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プラスチック
用途 > 光学測定技術 > プラスチック

生産時に直接補正

成形物、ペットボトルおよびフィルムの厚みが製造過程や包装過程で精密に確定されるかどうかには関係なく、CHRocodileセンサー装着によって常に確実な測定が可能となります。 非接触で迅速な測定によって生産プロセスのぶれが検知されます。 高速測定により、生産過程中の制御介入が可能です。 弊社のセンサーは、著名な製造業者における射出成形物のトポグラフィー測定やブリスター(PET、PP、EVOH)の厚み測定で実証済みです。

用途
CHRocodile S / SE
射出成形物上のトポグラフィー測定

射出成形物は元来、形態、色、あるいは表面性質に関して多様です。 トポグラフィー測定システムはこの境界条件に見合い、意義のある値を提供するものでなければなりません。 大型絞り調整付き光測定ヘッド内蔵の CHRocodile SE センサーは、この条件を完璧に満たします。 これはすべての表面に使用可能で、ほとんどすべての部品形状に対応し、そして周囲環境からの影響はあまり受けません。 この測定の精密性および水平方向分解能は、µm領域にあり、軸方向分解能は サブµm 領域にあります。 これを通じて CHRocodile SE は数 kHz の素晴らしい測定値を提供します。 しかし、これらの確証たる値がプロセス環境へ簡単に活用できなければ、何の意味があるのでしょうか? そのために、多数のインターフェースを介した外部ハードウェアとの同期によって、産業標準が常に更新されるようになっています。

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CHRocodile K
Thickness measurements of foils

いろいろな要求のある条件の下で、薄く透明で非透明なフィルムは、高速に生産されます。 このため、センサーは、その生産の間において、膜厚管理をするために必要になります。 このセンサーの測定において、環境要因(例えば膜の温度、湿気または振動)に影響を受けることができません。 CHRocodile Kは、この分光干渉計測定原理により、これらの条件 ― 最も高い精度と測定スピードををかけ合わせたすべて ― を完全に満たします。 これは、フイルム製造のプロセス・パラメータを最小の遅延でコントロールすることができます。

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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.

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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. 

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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 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. 

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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. 

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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. 

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CHRocodile K
Non-destructive measuring of plastic welded seams

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.

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