In the lab
Do you want to know what tests the cases have passed in Gaiker's independent laboratories?
The objective of these tests is to decrease the weight of the cases, without sacrificing their thermal insulation, and if possible to improve it. So, we have selected three cores of different materials with good thermal capacities. A core is the material that serves as a reinforcement to the carbon fiber or glass: it makes it stronger in exchange for adding more weight. In summary, we are going to test the following objects:
- a fiberglass violin case
- a fiberglass cello case
- the same fibreglass cello case, but thermally fatigated, i.e. after having endured the following temperature cycles: 2 hours at -20 ºC - 2 hours at 80ºC - 2 hours at -20 ºC - 2 hours at 80ºC
- three samples of reinforcement cores of different materials with good thermal insulation, which we have chosen to reinforce the cases with lower weight
- a violin case made with fiberglass and the core with greater thermal insulation
First, we have tested of all these materials mechanically (ensuring that they are sufficiently robust), then thermally (check that insulate against cold and heat) and finally we have investigated more ecological laminating options.
Impact and bending resistant
The video shows the impact tests, according to UNE EN ISO 179-1/2fU:2011, and flexion tests, according to UNE EN ISO 14125:1999/A1: 2011. What are they for? To be sure that the cases and the three selected different cores (reinforcements that go inside the fiber layers) are adequate for their everyday use.
Capable of withstanding extreme temperatures
The maximum temperature chosen is 80 ºC, because it would correspond to the case in a car in summer. The minimum is -20 ºC. The thermal shocks range from the maximum temperature (80 ºC) to the minimum one (-20 ºC).
These tests have been carried out at different temperatures:
8 hours at -20ºC in a refrigeration room of about 8-10 m3 of volume
8 hours at 80ºC in an oven (the one in the next photo)
4 alternate cycles between 80 and -20ºC (80, -20, 80, -20), of 2 hours each, to simulate thermal shocks