Custom-made school bag counting: The so-called counting is to calculate the yardage of raw materials used in batch handbags, and the method is as follows:

1. Distinguish the types of raw materials required for handbags. 2. According to the specifications on the paper grid, calculate the area of each paper grid. 3. Calculate the area sum (square inch) of various raw materials and multiply by 1.09 (the material loss is 9% when cutting the remaining materials). 4. Use the formula: the calculated number is the number of yards required for batch handbags. However, the planning method of the cutting bed supervisor is based on the method of laying out the material. The total number of yards required to arrange the number of paper grids and the number of yards of raw materials required to arrange enough production volume are calculated according to the ratio. This method of material counting by the cutting bed supervisor is the most accurate and practical.

Customized nesting of school bags: nesting is a technical work of cutting work, which can save raw materials for cutting work. In a set of paper grids, the sizes of the paper grids are different, and the specifications of the raw materials always have a fixed width data, generally 54 inches. 56.58.60 inches in 4 widths. One width often has the situation that there are more than X blocks and X+1 blocks are insufficient for one paper grid. In order to save raw materials, we also arrange another small paper grid to use the remaining raw materials after X blocks are arranged to achieve the purpose of making full use of raw materials. Generally, the following rules must be followed for nesting: 1. Arrange the large paper grids first, and then the small paper grids. 2. The surface pattern and inner texture of the raw material should be considered in nesting. The pattern on the surface should be placed upright, obliquely, horizontally, and upside down, and the paper grids should also be upright, obliquely, and upside down. The inner texture of handbag raw materials, especially genuine leather, can be divided into the horizontal grain and straight grain. Grasp the two ends of the raw material and stretch it with your hands. The ones with stretching force are horizontal grains; the ones without stretching force are straight grains. Horizontal grains have a strong compound folding force, and bag covers, handles, and straps that need to be swung frequently should be laid out according to horizontal grains. Straight grain has a strong supporting force and can withstand extrusion without deformation. Front and rear panels and most components should be discharged according to straight grain. Horizontal grain may become longer during the process of a lathe, while straight grain will not, pay special attention.