Is there a crack in the line rubber just now? Is it normal?
If the bottom die deformation caused by cracks is not normal, there may be now the weather temperature is too high, shrink too fast, so if you want to avoid cracks, paved cast-in-place board, covered with a layer of thin film, the water goes slowly, it is not easy to crack.
To see the size is too big, of course not, it is a small contraction of uneven.
