I am designing palstic tool chest(box). Most of job regarding the design is already done, however I am still confused about right variant of plastic latch I should pick up.
There are two size variants of box: 20 and 22 inches big. Biggest is up to 25 kg.
I chose 4 types of latches I am interested in(visible on the picture.
What pros and cons they have and what should I consider before selecting the final variant?
The one piece designs, blue and yellow, are made for close tolerances and little or no squeezing tension. The two part latches have more closing tension any will tolerate more mismatch for a process such as blow molding.
Intuitively the upper box rim will be stiffer and hold its shape better with an increased “draft” angle. Vertical walls and the top edge is going to flex inward in plastic molding.