I have studied this industry before. I told you to see for yourself if it is correct. The newly made mold is very good, but it is not well installed, and many "defective products" are easy to appear, so it is necessary to adjust the mold spacing. The general method I have seen is to install the upper mold first and then install the lower mold. The lower die does not need to be fixed first. Try to make two products appear. If there are no problems, just fasten them directly. Otherwise, if there is a problem, find two thin iron sheets and aluminum sheets to balance the left and right sides of the lower die. One piece won't work, two pieces will do, just adjust it and buckle it directly.