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March 8, 2021

COBA Plastics Moulding Invests in 3D Measurement

COBA Plastics Moulding has invested in an ATOS Q measuring device from GOM, which will allow the company to take on projects with strict dimensional tolerances, that require precise three-dimensional measurement at all stages of production.

atmos q 3d measuring device for plastic injection moulding

Since its acquisition by the COBA group, CPM has undergone a process of continual development and investment, which has led to us winning more projects that demand the highest dimensional quality control. Until recently, all measurements were carried out with callipers and gauges or other non-digital processes, and this can be sufficient in many applications. However, in certain sectors such as automotive, where tolerances for moulded components can be as small as 0.1mm, precision is key.

The CPM team initially sought an external partner to take on the necessary measurement requirements, however, given the volume of work faced, it made more commercial sense to invest in equipment that will benefit all clients as well as widening the type of work CPM can carry out.

How does stereo optical measurement work?

3d measuring device for plastic injection mouldings

The manufacturer GOM describes the equipment functionality as follows:

‘Precise fringe patterns are projected onto the surface of the object and are captured by two cameras based on the stereo camera principle. GOM’s projection technology works with narrow-band blue light, which means that interfering ambient light can be filtered out during image acquisition.’

What is 3D measurement used for?

Our clients design complex products and machinery including cars, which are based on precise 3D CAD models. If an injection mould tool does not accurately reflect the original design drawing, then this will translate into issues with finished product. Automotive OEMs in particular have very high standards that we need to work to, such as RPS alignments and geometrics features, and by increasing the accuracy of our measurement processes, means more reliable end products.

CPM’s sister company COBA Automotive are used to dealing with tight tolerances and the two organisations have been able to share knowledge during the introduction of this new process. The ATOS Q unit is a 3D scanner than is ideal for moulded parts, whereas COBA Automotive who specialist in plastic extrusion, uses a polished resin process to analyse the accuracy of its profiles.

atmos q user measuring plastic moulding

What the benefits of 3D measuring in the moulding process?

At COBA Plastics Moulding, the ATOS Q device will be used for three main functions day-to-day: tooling measurement, PPAPs (production part approval process), and in serial production.

Measuring injection mould tools is something that CPM hasn’t had the capacity to carry out until now and will allow the team to quickly identify whether non-conformance is related to the tool as opposed to other elements in the manufacturing process. Problems identified at this stage can prevent more expensive issues further along.

Providing more accurate information in the PPAP offers our customers reassurance that production will be consistent and meet their vital production schedules. And finally, using the device for measurement in serial production will improve the speed and reliability of quality control at the manufacturing stage.

The new technology has been in near constant use since its arrival in December, as the team tackle a backlog of PPAPs for some exciting projects with first tier suppliers in the automotive sector. Training on the tool was carried out during 3 days at GOM UK and CPM now has in the Quality team, three qualified graduate engineers that share the responsibility: Marcelo, Thaynara, Luis.

CPM’s APQP & Process Quality Engineer, Ketlyn Silva, said this about the new investment, ‘being able to offer this level of analysis is a big step forward and means that we’ll be able to work on a wider range of projects that require PPAP and serial production measurement, predominantly in the Automotive sector, but also for our non-automotive customers that need a precise and reliable quality inspection process.’

Speak to us today about how our new equipment can support your next project, in reducing production delays and ensuring the highest quality of finished product.

Telephone: +44 (0)116 240 1551