Patent ID: 9738052
Date: 2017-08-22
CPC Classifications: B29C,B29L,B32B,B60R,B62D,Y10T

Claim:
1. A resin-laminated board having two sheets layered on each other with a hollow part interposed therebetween, one sheet having a plurality of recesses formed by recessing the sheet into the hollow part and the two sheets being connected to each other with the plurality of recesses by welding bottoms of these recesses to the other sheet, wherein: the one sheet comprises a thin-plate part having a plurality of first recesses, a thick-plate part having a plurality of second recesses with larger depth than the first recesses, the first recesses and the second recesses have an open structure, the first recesses and the second recesses are arranged at substantially the same pitch, the first recesses and the second recesses extend in diameter from the bottom toward opening, a bottom diameter of the first recesses and a bottom diameter of the second recesses have the same size, the first recesses of the thin-plate part are independent of each other while the second recesses of the thick-plate part are independent of each other, and a tilt angle of a slope of the first recesses is adjusted to be larger than a tilt angle of a slope of the second recesses to make an opening diameter of the first recesses at a front surface of the thin-plate part and an opening diameter of the second recesses at a front surface of the thick-plate part have the same size.