Koma sewing glasses case

This is a long time The actual ones I made before were released a few years ago. Because I saw someone asking about this method, I sorted out the existing pictures and posted the production process. The pictures are not comprehensive, so I will try to describe them in more detail. This is the first time I try to use 3D software to design Juzuoleather goods, folded in half The calculation of the amount of expansion and contraction after bending was not very accurate. After sewing, the sides were a little shorter, so I added a piece of leather to make up for it. Main materials: 4.0mm thick soft leather belly strips, 1.8mm Tochigi vegetable tanned leather. Tools required: leather knife, diamond chopper, groove digger, edge cutter, awl, wide shovel. Production steps:

The design drawing uses the SOLIDWORKS sheet metal function Drawn, this is a wireframe.

This is an entity picture.

Such benefits It is possible to automatically generate expanded diagrams.

Expand the image directly Import CAD to draw and cut holes. This is the complete version of the drawing.

Print the drawn drawings and cut the plates.

Line cutting The skin is made from domestic vegetable-tanned pork belly strips. The quality of this kind of belly strip is not good, but the shaping effect is good when the thickness is enough, and it is also very suitable for seams.

Cut the leather After that, use an awl to trace the holes. It is not recommended to use the chop pad to punch holes directly on the pattern because it is difficult to ensure the accuracy of the margins. The main purpose of tracing points is to record the number and approximate location of cut holes.

This step was at that time I didn’t take a picture, so I’ll use another picture instead. To make oblique holes on the side, first use a diamond chopper to drill about 1/3 of the thickness, and then use an awl to insert the angle at an angle based on the edge distance of the upper and lower covers.

Harder In order to prevent the seams from wearing out, vegetable tanned leather usually requires grooves or grooves. I used grooves.

Side endothelium I used a piece of Tochi wood vegetable tanned leather, which is relatively thin and hard, and it’s hard to find one with a similar color, so this piece happened to be suitable. The density of domestic pork belly strips is relatively poor. If it is thinned below 2.0, it will become very soft and difficult to maintain its shape. Put the side and insideStack the traced holes inside. When tracing to the bend, bend over and trace so that the approximate position of the hole can be correct. Because it is inconvenient to take pictures, this picture was taken flat.

Thin A small piece of leather used to seal the magnet.

On the inside Dig a hole in the side strip and bury the magnet inside. The purpose of digging the hole is to bring the positive and negative poles of the magnet closer to ensure a certain suction. If your magnet is strong enough, you don't need to dig holes.

Use bed surface Polish the back with a treatment agent.

Use a small Thin skin. In order to ensure that the holes on the inner side strips of the double-sided wavy lines were punched from the reverse side. First, use a thin awl to punch through the points traced on the front, and then use a diamond chopper to punch the holes from the back. In order to prevent the seams from being worn, grooves are also dug on the reverse side first.

Covered Use the same method to bury a magnet on the side, paying attention to the positive and negative poles.

Polishing the upper and lower covers Edge sealing.

Seamed upper cover

Because of the hole spacing where the sides are bent It will become smaller. If the holes on the sides are equally spaced, the bend after the seam is not aligned with the top cover and will be lower than the top cover. This can be solved by stealing stitches and changing the hole spacing. I adjusted the side when drawing the picture. As for the edge hole distance, you can see that the hole distance at the bend is larger.

Similar to the stitched bottom cover

This is the first time I try to use this method to design leather goods. The calculation of the shrinkage length after bending the side is not accurate, and the side is short, so I added it like this A piece of skin.

What the stitching looks like after completion.

Sew the sides and inside. Because the holes are traced according to the side skin, one-to-one sewing is very smooth.

Finally, sew the top cover and bottom cover together with softer leather. In order to avoid the cross pattern, I sewed it in two pieces.

Complete picture.

Original https://www.shougongke.com/course/478621.html

Komasuo glasses case