2. Trimming: According to the technical requirements, leather fabrics or cardboard are trimmed in Zizhou, and the depth and width of trimming depend on the technical requirements.
3. Enclosure: The fabric or lining and lining are attached together as required, and sewn together along the periphery with a larger needle code to form a whole, which is beneficial to the subsequent process.
4. Cutting: Cut off the redundant fabric that affects the sewing appearance at the bending or bending parts of leather and other thick fabrics because of the overlapping thickness after the peak, so as to make the seam smooth and smooth.
5. Glue brushing: temporarily glue the sewing parts before sewing to facilitate the sewing process.
6. Make the refill: The refill belongs to the interior parts of the suitcase and should be made before sewing the interior parts.
7. Pocket roller: wrap the pocket of the raw edge with a roller bar.
8. Pocket embedding: embedding at both ends of the opening line of the bag.
9. Inlet: Cut the middle part of the inlet along the chalk line with embedded thread.
10. bag mouth sealing: both ends of the bag mouth are sealed by machine.
1 1. Trimming seam: There are generally two methods to trim the edge of seam: trimming on both sides and trimming on one side.
12. Grinding: the process of cutting the whole part.
13. Direct peeling: peeling directly by hand until it meets the process requirements.
14. Indirect scraping: the edge of the parts scraped on the scraper is corrected by "changing the tool". If the parts ground by the machine are not straight, the parts will be inlaid with each other, resulting in uneven surfaces of the inlaid parts, thus forming product defects. Therefore, it is necessary to correct the grinding quality through manual secondary grinding.
15. Trimming: the process of folding the excess part of the edge and bonding it with adhesive according to the technical requirements.
16. Virtual straight edge: Virtual straight edge is relatively simple and easy. Before edge fitting, the edge of the part should be scraped flat. According to different product requirements, draw lines according to the specified wrapping amount to ensure that the edge after wrapping is straight, and then fold the skin with glue.
17. Solid straight edge: When building a solid straight edge, firstly, stick the wrapped fabric on the lining material, leave the edge skin outside the lining material, apply adhesive, and then fold and stick it on the edge of the lining material so that the edge of the lining material is not exposed.
18. Evaluation of concave edge: It is more complicated to evaluate concave edge than straight edge, because the inner contour of concave edge is smaller than that of closed edge. Before fitting the edge, the inner contour line should be equal to or slightly larger than the contour line of the fitting edge, so as to fit the edge well, which requires it to be firm.
19. convex edge: convex edge is opposite to concave edge. Because the outer contour of the convex skin is larger than the actual contour of the convex skin, it is necessary to shorten the outer contour of the convex skin to be smaller than the contour of the convex skin, so it is necessary to shorten the contour of the convex skin.
20. Concave-convex edge (lace): Because the shape of concave-convex edge is complex and the shape of concave-convex edge is the same, the concave edge can follow the operation process of concave edge, and the convex edge can follow the operation process of convex edge, but the roundness of the edge must be paid attention to when turning concave-convex.
2 1. wrapping: stick cardboard ribs on the edge of the inner lining of the assembly to form a bulge and decorate the edge of the assembly. After this operation, the fabric is bonded, and finally the edge bonding is performed as required.
22. Edge dyeing: It is a common method used by monks.
23. Binding: There are two kinds of binding edges: natural edges and different color edges. Before binding, cut the binding tape first, and then cut the edge of the part. Generally, the hemming strip is required to be hemmed with a thickness of 0.3-0.5 mm, and the parts are hemmed with hemming, and then sewn on the sewing machine.
24. Trimming (burr): It is another process method of edge decoration. Because the thickness of leather itself can not meet the needs of products sometimes, in order to ensure the edge thickness, trimming is adopted to reach the specified thickness of the edge of parts.
25. Edge lifting: When lifting the edge, first polish and punch the edge of the part, and then sew it with materials such as thong and thick thread to ensure uniform seam marks.
26. Plane mosaic: Plane mosaic technology is generally used for plane mosaic. When used in boxes, caulking is not stitched, so the bonding at caulking is required to be firm. The adhesive is generally chloroprene rubber with good viscosity.
27. Stubble splicing: It is a splicing method in which the edge of one component is overlapped and pressed on the edge of another component. Grafting technology is generally used to connect luggage and leather bag parts.
28. Docking: Put the two sides of the two parts together on a plane without any overlap in the middle. The edges of parts requiring butt joint should be cut straight and butt joint should be smooth.
29. Seam pressing and splicing: The seam pressing and splicing process includes two steps. First, the edges of the two parts are butted on a plane, and then the designed parts or decorative parts are covered at the seams, and the seams of the parts are hidden by sewing.
30. The parts are adjacent to the core: the convex core material is filled between the two parts, which makes the surface of the parts form a concave-convex three-dimensional effect and the molding shape is more beautiful.
3 1. Double corner: mainly used for high-grade leather luggage products. When operating, cut off the extra material of the corner, coat the edge with adhesive, and then flatten the straight edges on both sides of the corner. Pay attention to evenly pinch pleats during operation, and the number of pleats at the four corners should be equal. Generally, it is better to pinch 6-8 fold for each wrap angle, so as to ensure the roundness of the wrap angle arc. After the wrap angle is folded and clamped,
32. Branding: Using the high temperature and high pressure on the leather logo, the handwriting engraved on the copper film (sometimes aluminum film, the effect is not as good as that of the copper mold) is pressed on the leather surface. In the process of operation, it is necessary to pay attention to: select the appropriate temperature and pressure, and act on the appropriate materials to meet the customer's product requirements.
33. Sticking tape: During the operation, some positions or parts that are not suitable for brushing glue can be fixed by sticking tape. Many factories choose double-sided adhesive tapes with different widths to produce temporary adhesion for subsequent operations.
34. Stubble pressing: This method is often used in the production process of products. First, polish the edge of the upper pressing part smooth (with burrs), coat the sewing needle on the edge of the lower pressing part with glue, and press down the edge of the lower pressing part.