Automotive interior trim sewing and coating process

Abstract

The invention relates to an automotive interior trim sewing and coating process. The automotive interior trim sewing and coating process is mainly to solve a problem that stitches are exposed by usingan existing sewing process when splicing seams are stretched. The automotive interior trim sewing and coating process comprises the annular sewing process steps of using a flat-bed sewing machine tosew and splice the stitches; using an upright sewing machine to sew double stitches, step edges or other appearance stitches; splicing two cut fabrics; lining a liner band under the spliced part of the two fabrics, wherein the width of the liner band is larger than the distance between splicing stitches on the two fabrics; and sewing the liner band to the two fabrics, wherein the shape of a skin is required in such a way that the skin can be unfolded to a flat surface near the stitches. The automotive interior trim sewing and coating process comprises the rounded corner coating steps of designing grooves for accommodating stitch splicing seams in positions, with the stitches, on a framework, wherein the widths of the grooves are larger than the sum of widths of flanged edges of the two fabrics; designing supporting ribs for accommodating foams in edges, with PU foam and 3D mesh, of the framework; enabling the fabrics to coat the framework; and enabling the spliced parts to be positioned in the grooves of the framework. The automotive interior trim sewing and coating process has the advantage that the stitches are not exposed when the splicing seams are stretched.

Description

Technical field: [0001] The invention relates to the sewing and covering technology of automobile interior decoration. Background technique: [0002] Sewn patchwork on automotive interior products is divided into decorative and functional. Functional seams are designed to reduce stretch in the fabric, allowing the cover to wrap around three-dimensional shapes. Airbag seams are also functional seams. The purpose of designing decorative patchwork is to play a decorative role. The mask of the same shape can still cover the skeleton obediently after removing the decorative seams. The many patch seams are both decorative and improve fabric stretch during wrapping. [0003] The sutures sewn by ordinary sewing machines in automotive interior products are called "lock stitches". Most of the sutures on interior products are lock stitches. Stitch length, for spliced ​​sutures, the general stitch length is 2.5--3.5mm. For appearance sutures, the stitch length is usually 4--5mm. ...

AI Technical Summary

Problems solved by technology

[0006] However, in the existing sewing process, there will be the problem that the seam is exposed when the stitching is stretched. In addition, the curve shape of the double stitching is not smooth, and there will be defects such as uneven fabric after sewing.

However, in the existing cladding process, the interior appearance is often distorted in a wavy shape, which affects product quality.