Technical Requirements For Leather Shoes Production

I. Basic requirements for cutting materials

1. The same color, thickness, grain size and thickness of the same parts of the same pair of shoes.

2, help the front is better than the latter, the outer side is better than the inside side; the back of the gang is better than the front, and the inside is better than the outside side.

3, reasonable use of injury, allowing slightly slightly loose and not obvious bright boil, blood tendon, but not allowed to have split face, pay attention to fiber direction (generally take vertical).

4, material edge should be neat and smooth, minor parts can be slightly loss, but can not be out of shape.

5, after cutting, the quality of the single chip and the whole batch should be checked in time. Whether the quantity is consistent with the production notice, whether the proportions are accurate or not, and whether the marking is clear or not.

Two, the basic requirements of film gang.

1, before the film should try the film, confirm that the blade is ready for use without dirt, and do not use the blunt knife reluctantly.

2, before the film should be familiar with the process and technical standards, in order to clarify the type of film to help determine the size of the film.

3. Small parts or pieces should not be pulled hard to avoid breakage or deformation.

4, after the parts are finished, check the number and do not mess it up so as not to use the wrong plate when operating the next process.

5, after the machine piece does not meet the specifications of the parts should be manually changed.

6, the film requires the same type of slope consistency, consistency and consistency, the film requirements, ensure that the thickness of a certain strength, ensure uniformity.

Three, the basic requirements of hem edge.

1, brush should be uniform, in place, not too wide, not too thick, large amount of leather absorption can be evenly brushed back and forth 2-3 times.

2, suede brush should be more careful to prevent glue on the fluff.

3, after the object is brushed, the time should not be stored too long.

4, natural glue is a flammable article. In the whole process of rubber brush, avoid fire.

5, the pad should be kept clean to prevent dirt or grease from sticking to the parts and affect the fastness.

6, after the object is rubbed, it should be placed in the ventilating place to dry naturally.

7, the glue applicator must be used as soon as possible.

8, when sticking or fixing the template, it should be aligned, the pattern should be leveled, and the appropriate margin should be set up according to the requirements, and the margin should be uniform.

9, in case of concave arc hem, the cutting edge should be cut first, the cutting depth should be about 1/2 of the hem, and the cutting density should be determined according to the radian size.

10, in case of convex curved edge, fold edges should be wrinkled, wrinkles should be meticulous and uniform.

11, after the hem, the parts should be neat, smooth, uniform in volume, uniform in thickness, not allowed to be out of shape, not allowed to crack, not allowed to be exposed, not allowed to break the surface, and smooth corners should not be allowed to have a corner.

12. When marking the mark or marking the line, do not pierce the sticky surface of the leather, print clearly, do not omit, and do not go out of shape.

Four, the basic requirements of inserting and sewing.

1, when inserting, it must be inserted accurately, so that the spot can be pressed.

2, before sewing, we should first look at the production template and master the technical standards, familiarity with the properties of the surface materials, adjust the stitch spacing density, familiarity with the combination structure of the upper, grasp the number of stitches, the connection between sutures, and the specifications of stitching distance.

3, sewing requires neat lines, uniform stitches, and uniform tightness of the bottom line.

4, minor parts jumper and heavy needle allow one stitch, and no more than two shoes per shoe.