When we understand a product, we must first understand its basic knowledge, so as to better understand it, or understand more thoroughly, these are related to the basics, EVA bag is also the same, then the basic knowledge of the bag production process you know how much? Here let Chfine case to talk to us.

    1, Sewing plate: generally start at the bottom of the sign boy, the needle should be heavy 3-4 stitches line, line an inch 8-9 stitches, the requirements of the line is smooth, smooth, stop evenly, can not be skewed. Users can observe the line around the trademark of the bag to find the problem!

    2, Pull the bone: the stop should be uniform, the corner position can not be wrinkled, the four corners evenly, the bag bone material should be close to the heart of the bone, can not appear broken bone phenomenon.

    3、Load the front pocket: must cover the front width needle hole, in the head of the enclosure or the bottom center position to start the needle, loaded out of the bag four corners to parallel, left and right symmetry.

    4、With the chain: the stop needs to be uniform and even, pay special attention to the direction of the zipper. Sewing out of the chain patch should be flat, not wavy.

    5, Barge round: to align the teeth of the sewing, zipper can not burst open, between the double line should be uniform, straight. Barge around the effect will directly affect the quality of buried bags. Surrounding too long or too short will cause buried bags out of crooked or wrinkled, in principle, before barge dark line to try buried bags, suitable before production.

    6, Sewing Velcro: sewing lines uniformly towards the hook, raw edges, up and down parallel, can not be skewed.

    7, Double back to the mouth hemming: hemming sub-mouth can not have a large thin edge, folding, burst phenomenon, the corners should be rounded and smooth.

    8, Loading cover head: the needle bit car, to balance, can not be skewed, the line should be straight, sub-mouth even.

    9、Load side pocket: pay attention to the direction of the slider, when pulling the buried zipper, the slider in the direction of the front width, loaded out of the bag to be square at all corners, the top and bottom parallel.

    10, Sewing back belt: pay special attention to the four-sided card and the center line, in general, the length of the four-sided card is 1, 5 inches, the center line should pass through the intersection, can not be bent, the two sides of the four-sided card folded sub-mouth to be evenly unified, the last closing stitch line to overlap.

    11, Sewing triangle webbing: in general, do not play the four-sided card webbing, into the triangle material within half an inch, to play the square card webbing, into the triangle material about 1 inch.