One of the methods of making handmade leather goods bulging: trimming the edges to make bulging

Many people ask about tips and tutorials on raising drums. Regarding this question, I actually refused at first =_=. At first, I thought about using an edge trimmer to control the thickness of the outer skin suture to about 3.5mm to make the sutures easier (there are After using smooth braided nylon thread for a period of time, your fingers will deform T^T, so it is recommended to use frictional twine such as normal thread and Zhijian twine*^_^*) for hand sewing to make the stitches more beautiful (Fazhan Thickening the skin will lead to deformation of the cut holes) and smoother and better-looking edge sealing (thick edge sealing is more laborious and unpleasant), so the bulging effect is not my main goal⊙_⊙. Regarding playing drums, let me tell you about my own method. First, use an edger or wide shovel to trim the outer skin. It is recommended to use a 1.7-2.0mm outer skin to trim the location where the suture is required to 1.2-1.4mm (the long clip in the picture is just a schematic diagram, just understand it>_< ;). How to control the edge-shaving machine: You can make a mark on the leather surface, adjust the speed of the edge-shaving machine to the slowest (assuming the motor can adjust the speed^ ^), then slowly trim the edge, stop when it is almost to the mark, and leave the remaining space. Just use a paring knife to handle it, its difficult to stop it accurately with a machine alone.

Then glue , cut the sutures. After suturing, it is recommended to use leather flat-nose pliers to flatten the sutures (you can also flatten the cut-hole clips pulled up when pulling the threads^_^).

The edger draws the inner and outer edges (The inner line is the key dividing line for drumming, use an adjustable edger to draw it clearly); then just shape it with a shaping rod (I personally think it is necessary to add a shaping rod).

< img src="https://img.111diy.com/timthumb.php?src=/d/file/p/fa1aa6d5e7996212a985ca0d17d0b13f.jpg" alt="">

PS: Remember not to use brute force when drawing the border. Just draw the trace gently for the first time, and then Gradually increase your strength along the line marks to draw an edge line of sufficient depth. Do not use too much force to draw the line for the first time, as it may cause deformation and deflection. After drawing the edge line hard, it cannot be repaired x__x. I drew two After threading, small slopes will be formed on both sides of the suture, which has the effect of digging and pressing grooves to hide threads and prevent friction. The thickness of the shaved outer and inner skins is about 1.2mm, which is not suitable for digging and pressing grooves to hide threads.

Drumming and trimming