Control | machinery feature
Whether they are checking profiles for dimensional accuracy or saving material on large diameter pipe, inline control systems are vital to product quality. Lou Reade reports
Measured response: taking control in pipe and profile production
It may sound simple, but getting a pipe to extrude in an exact circle is no easy task. Die swell, and a host of other factors, can lead to products that are less than perfect. In addition – especially for larger pipe – controlling the amount of material extruded can be a crucial factor. These factors – along with others, such as identifying
extrusion errors in the dimensions of profiles – can all be controlled and adjusted with modern inline measure- ment systems, which use everything from laser technology to millimetre waves to ensure high precision.
Surface effect Pixargus says that its ProfilControl 7 (PC7) system – launched at K2016 – is the first to combine complete surface inspection and 360° contour measurement within a single sensor unit. The system is scalable and enables new synergies
between surface inspection and contour measurement, says the company. A newly introduced virtual camera function makes it possible to perform several different inspection tasks at the same time, while a new lighting concept expands the measuring sphere. The measuring modules are integrated within one sensor head and switchable separately or in parallel.
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Up to eight hybrid power multi camera sensors are in place to capture extrusion line data. Correlating the corresponding contour and surface information becomes much easier, as all measured data comes together in the same sensor unit. The new PC7 series saves money as it no longer
requires the investment in a separate shape measuring system, claims the company. In the lighting system, PC7 uses both LED and laser
technology within the camera’s field of vision. Using both systems helps to raise calibration performance. Simultaneously, the Light-Edge elements developed by Pixargus ensure that the measuring field is homogene- ously lit, allowing the camera sensors to capture and process irregularities and defects that were previously difficult – or impossible – to detect, such as specks, pores, scratches, cracks or grooves. In contrast to its Dualhead predecessor systems, the light ring in the PC7 is integrated into the sensor head. The compact design of the new system adds to the ease of handling, and shields the light ring from external mechanical impact. It can also perform special tasks such as intelligent hole and flock inspection, variable extrusion and defect density management. The system
April 2017 | PIPE & PROFILE EXTRUSION 13
ProfilControl 7 from Pixargus combines complete surface
inspection and 360° contour measurement
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