Leather carving process

Abstract

The invention relates to a skin sculpture process, which is characterized in that the process comprises the following steps: a corresponding punch is manufactured according to a selected pattern, a concave die is replaced by a soft polyamine lipid plate without the need for manufacturing the concave die, and the punch and the soft polyamine lipid plate are combined into a die; a PVC sheet is pasted on the back of leather; the die is put on a hydraulic press and a leather product after adhesion is placed between the punch and the soft polyamine lipid plate; the front of the leather is tightly attached to the soft polyamine lipid plate and the PVC sheet faces to the punch; hot pressing die assembly is carried out rapidly, the temperature of the hydraulic press is 80 to 90 DEG C, the pressure is 5 to 10MPa, and the die is opened 5 seconds later for cooling; a polishing machine is used for polishing: the color on the surface layer of the leather is polished, the ground color is exposed and a comparison pattern between the bottom color and the color on the surface layer is formed; the convex combination effect of the pattern and the leather can acquire the required relief pattern on the leather. Compared with the prior art, the skin sculpture process has the following advantages that: 1. as the concave die is free from manufacture but substituted for by the soft polyamine lipid plate, the manufacturing technology is reduced and production cost is reduced; 2. manufacturing temperature is reduced; as the punch can be made from non-metallic material instead of metallic material, the production cost is further reduced and the processing is easy; 3. as for the leather, double-colored or multi-colored leather is adopted and for hot pressing and polished for forming the relief pattern with rich pattern hue.

Description

(1) Technical field [0001] The invention relates to a manufacturing process of packaging materials, in particular to a process for producing a relief-like three-dimensional pattern on leather. (2) Background technology [0002] At present, there are many techniques for making relief-like three-dimensional patterns on leather. The invention patent with the publication number of CN 1899857A discloses a leather carving process. This process is performed by laminating PVC on the back of the leather and then performing heat-compression bonding. The embossment height on the leather is greatly increased, and there are no problems such as leather damage, cracking, inaccurate patterns, blisters, and obvious wrinkles. The relief is beautiful and has a natural effect, but the convex and concave molds need to be made, which makes the cost insufficient. In addition, the two-color PU leather with a temperature resistance of 120°C used in this process can only obtain two contrasting colors...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many techniques for making relief-like three-dimensional patterns on leather. The invention patent with the publication number of CN 1899857A discloses a leather carving process. This process is performed by laminating PVC on the back of the leather and then performing heat-compression bonding. The embossment height on the leather is greatly increased, and there are no problems such as leather damage, cracking, inaccurate patterns, blisters, and obvious wrinkles. The relief is beautiful and has a natural effect, but the convex and concave molds need to be made, which makes the cost insufficient. In addition, the two-color PU leather with a temperature resistance of 120°C used in this process can only obtain two contrasting colors after polishing, and the pattern tone is not rich enough

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