Learn to use a shallow groove edger in 10 minutes

Tools such as shallow groove edgers are mainly used to make decorative edges. They are different from ordinary adjustable edgers. In addition to making edges and decorations, they can also create a full and round shape on the edge of the leather. Many people may not be very familiar with this name. In Japan, such a shallow groove edger is called Tamatsuki, and you may have heard of this name more often.

Except in some European-style craftsmanship will be used, and some finer Japanese-style and American-style craftsmanship will also be combined with shallow groove edges, which will be used on the edges of card slots and the outer edges of the entire wallet. ①

Then if If you choose a shallow groove edger to use on vegetable tanned leather, it is recommended that you lightly cold press it once, then use a sponge to soak in a little water and wet the edge of the leather along the stitches, thereby softening the leather and creating a dark and colorful line. Full edges.

If it is chrome When tanning leather, you can first heat the edger with an alcohol lamp. The heated edge can leave traces in the coating, making it difficult for the edges on the chrome tanning to dissipate.

Adding water in this way is easy If it is heated, the steel material used to make the shallow groove edger is more resistant to embroidery and high temperature than ordinary edgers. However, once the ordinary steel turns black and rusts, it will affect the smoothness of the edger, and Leather goods The neatness of the edges greatly reduces the beauty and value of the work. In order to properly resolve thisThis is a question. The shallow groove edge we make is made of very high-grade 304 stainless steel. The characteristic of 304 stainless steel is that it is relatively stable and not prone to blackening whether it is exposed to rain or heating. Rust, better protect your works. ②The special thing about the shallow groove edger is that in addition to the ordinary edge, it can also perform an additional function, which is called the waxing process.

Waxing process It is also a very advanced skill. During post-production and polishing, there will be more changes in color and layering. It is an advanced edge treatment.

Use alcohol first After heating the shallow groove edge with a lamp or other heating device, cold press one edge like adding water.

Use alcohol afterwards Use a lamp or other equipment to heat the shallow groove edge device, dip it in solid paraffin, let the wax melt in the shallow groove, and then go through it evenly again to perform hot pressing treatment. This kind of operation can melt the wax layer on the edge of the leather and evenly immerse it into the inside of the vegetable tanned leather, so that the vegetable tanned leather has two colors outside the edge and within the edge. ③If you want to perfectly display the above process effects, it is very difficult to make a shallow groove edger. Many of my friends may have used shallow groove edgers from other companies in the industry. Many friends also asked me, why are the curvatures of their shallow groove edges so large? In fact, this is not a functional design, but a cost issue. Generally speaking, the wire trough of the shallow groove edge device is first made into a large disc with a milling cutter, and then cut from the disc into several prototypes of the shallow groove edge device. When produced in this way, the relative cost will be relatively low. Low.

But disadvantagesThat is, when using a shallow groove edger to make a corner, you need to tilt the handle at a very large angle, and then you can make the corner very smoothly. This can easily cause center instability and result in operational errors.

Basic model After we discovered such a problem, we immediately abandoned the traditional method and chose a CNC engraving machine to carve each cutter head separately. The presser foot and pressure head of each shallow groove edge line were made separately. So relatively speaking, the cost of making a shallow groove is two to three times that of an ordinary shallow groove, so as to ensure sufficient practical functionality.

CNC engraving machine As for the cost, it’s a trivial matter~ ④ Another core difficulty in making shallow grooved edges is the adjustment of the gap between the high and low legs. The difference between the height and the foot has a huge impact on the edge shaping effect. If the gap between the high and low feet is too large, the fullness of the edge shaping will be much different. But if it is too small, the presser foot will not be able to rest on the edge very stably, causing it to wander out of control and directly destroy the edge of your leather.

Then our The presser foot is chosen with a gap of 0.3m. Firstly, it allows everyone to have the best use feeling while ensuring the appearance. Secondly, it also makes it less likely for people to make mistakes by scratching the inside of the leather when using it. So the control of this 0.3mm is very precise, and the size error of each item is controlled within one thousandth of a millimeter, ensuring a high degree of consistency. ⑤After years of development in the handmade leather industry, everyone has improved their understanding and improvement of the craftsmanship, and the early shallow grooves exposed a large number of inherent problems. For example, straight lines will deviate, corners will be pressed out, the force will be uneven, heating will turn black, etc. Then you can consider trying this improved "master"~

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