1, the first is hardness: the greater the hardness, the greater the rebound. Last time 30 1-EH material was used, the rebound increased to 14 degrees. The greater the ratio of bending radius to material thickness, the greater the springback.

2. Secondly, the rebound of SUS30 1 is larger than that of SUS304, and the rebound of 304 is 2 degrees smaller than that of 30 1 under the same conditions. In addition, the resilience of Japanese 30 1 is greater than that of Taiwan Province province.

3. The final molding method is also different. The springback of one molding is greater than that of multiple molding.