The manufacturing process of backpacks with different uses is similar, but basically they are inseparable from the word sewing. As for the quality of finished products, it largely depends on the level of fabrics and sewing technology, and the details are improved according to the designer's design, different choices of fabrics, factory production and user experience. Special long arm riveting machine for luggage, short arm riveting machine, double-section riveting machine, automatic corner machine, etc.
When shoveling the skin, the fabric of the joint should be thinned first to ensure that the sewing process of the joint is beautiful and clean.
The function of the oil edge is to seal the fiber layer of the leather part, keep the shape of the fabric and increase the overall aesthetic feeling of the bag.
Folding: according to the shape of the package, the bottom is bonded and the raw edges are folded inward, which makes the sewing more neat and beautiful, and also plays a role in strengthening the shape.
The first is the collection of fabrics. It is understood that the fabrics and fabrics that often appear in general backpacks are: DuPont nylon fabric, Oxford nylon fabric, high-density nylon fabric and glued nylon fabric. Here are only a few commonly used fabrics, and each manufacturer may have its own secret recipe in the actual production process.
The next work is to turn the backpack on the drawing into a real thing. Cutting is an essential process. The whole cloth is cut into small pieces as required, which correspond to various parts of the backpack, such as net bag, rain cover, helmet cover, etc ... Of course, enough space must be reserved for sewing when cutting.
Sponge pads, used for shoulder pads or waist pads of backpacks, are not shown on how to cut pieces.
The other is to sew all the parts one by one. In the workshop, every part of the backpack will be sewn by a fixed tailor. Most of these tailors are women. Some of them have been engaged in this industry for more than ten years, and their skills are already superb. Their hands and feet are neat, and their stitches are clean and flat. Usually, several tailors form an assembly line and sew by hand with the help of a tailor machine. After several steps, the prototype of the backpack can hardly be seen. Of course, the production capacity cannot compete with other mechanized processes.
After sewing all the parts, the backpack is almost formed. Just connect the backpack system together and it's over. Of course, in practice, it is not so easy to do it in three or two sentences.
You may think that making a backpack is just a sewing process, but it involves hundreds of processes. In this whole process, the next sewing master will inspect the sewn products of the previous link and eliminate the defective products in time. Of course, the final product should be constantly repaired and turned over.
Extended data:
Here are some options:
1, tailor-made purchase.
Pay attention to whether the size of the schoolbag is suitable for the height of the child. Consider a small schoolbag and choose the smallest schoolbag that can hold children's books and stationery. Generally speaking, the schoolbag should not be wider than the child's body; On the back, the bottom of the schoolbag should not be lower than the child's waist 10 cm. When carrying a schoolbag, the top of the schoolbag should not be higher than the child's head, and the belt position should be between 2-3 inches at the waist. The bottom of the schoolbag is the same height as the lower back, and the schoolbag is located in the middle of the back, not hanging on the ass.
2. Pay attention to design.
When parents buy schoolbags for their children, they can't ignore whether the internal design of schoolbags is reasonable. The interior space of the schoolbag is designed reasonably, which can classify children's books, stationery and daily necessities, cultivate children's storage and sorting ability from an early age, and let children develop good habits.
3, the material should be light.
The material of children's schoolbags should be light and thin, which is easy to explain. Because students have to bring a lot of books and articles back to school, in order to avoid increasing the burden on students, they should try to choose lightweight materials for their schoolbags.
4. Shoulder straps should be very wide.
It is also easy to explain that the shoulder straps of children's schoolbags should be wide and wide. We all carry schoolbags. If the shoulder strap is narrow and the weight of the schoolbag is added, it is easy to hurt your shoulders when you carry it on your body for a long time. The shoulder strap should be wide, which helps to reduce the pressure of the schoolbag on the shoulder and evenly distribute the weight of the schoolbag; The padded shoulder strap can reduce the strain of the bag on the trapezius muscle. If the shoulder straps are too young, trapezius muscles will feel tired more easily.
5, equipped with a belt.
Children's schoolbags should be equipped with a belt, which was rarely used in previous schoolbags. Using the belt can make the schoolbag closer to the back and unload the weight of the schoolbag evenly on the waist and pelvis. Moreover, the belt can fix the schoolbag at the waist to prevent the schoolbag from shaking and reduce the pressure on the spine and shoulders.
6. Fashion and beauty
When parents buy schoolbags for their children, they should choose the type that conforms to their aesthetics and let them go to school happily.
People's Network-What kind of schoolbag is good?
People's Daily Online-Wuxi spot-checked the quality of schoolbags in some shopping malls ***4 batches were unqualified.