Usage of Flexfill TPU
in company DAIKIN
Dumping tools for covers to eliminate noise during production
Daikin Device Czech Republic s.r.o. is one of the worlds’ leading manufacturers of air conditioning equipment. For over than 90 years Daikin brand has been synonymous for high quality air conditioning for private, commercial and industrial purposes.
On one of the assembly lines in Daikin in Brno, it is necessary to mark two complex-shaped covers with serial number and 2D serial number code. During the marking annoying noise, which breaks the noise limit (up to 85 dB) is generated and it affects the well-being of the workplace and the concentration of the operators.
The solution is a production of an object that would eliminate noise during marking. Additive technology FFF shown up as the most advantageous option. The main reason for this decision is the complexity of rubber machining of such complicated shape and the high cost of creating a mold for molding the jigs.
One of the requirements is to print objects that must damp the noise and the vibration occuring during marking. In the same time, they must be resistant to wear. Considering all of these, Fillamentum has offered its Flexfill TPU 98A and Flexfill TPU 92A materials, which are flexible with good wear resistance. The Flexfill TPU line is characterized by good mechanical properties, flexibility and oil resistance. Another goal was easy processing and simple printing, both of these conditions have been also fulfilled with Flexfill TPU.
After printing and post-processing of the parts, the damping jigs were tested in serial production and the level of noise at working place was measured again with usage of sound-level meter. With Fillamentum materials and additive manufacturing technology, the hygienic noise limit has been reached. Positive effect on the noise level was caused by the choice of softer material Flexfill TPU 92A with hardness of 92 Shore A. Overall, the sound level was reduced by 5.9 dB to 80.7 dB.
| USED MATERIAL | HIGHEST NOISE MEASURED (dB) | DIFFERENCE BETWEEN ORIGINAL AND NOISE LEVEL | ||
| Damping tool for cover | Flexfill TPU 98A | 81.3 | 5.3 | |
| Damping tool for cover | Flexfill TPU 92A | 80.7 | 5.9 | |
It is interesting that originally 3D printing and the use of Fillamentum materials were intended only as a temporary solution. The printed items have been using in the production hall for two years now and during that period over 200,000 pieces of covers were made.
