Method for trimming cow leather

A technology for trimming and leather, applied in the field of cow leather production technology, can solve the problems of the influence of the integrity of the leather and the yield of the finished leather, the number of times of trimming the blank leather, and the high requirements of the operator, so as to avoid repeated trimming operations. , The effect of reducing leather width and technical difficulty

Active Publication Date: 2015-04-22
XINGYE LEATHER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the number of trimming of crust leather is large, difficult, labor-intensive, and requires high operators, which also has a great impact on the integrity of the hide and the yield of the finished leather.

Method used

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  • Method for trimming cow leather
  • Method for trimming cow leather
  • Method for trimming cow leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] As the wet-blue leather 1 of crust leather, the limbs, head and tail, belly and girdle, fringes, sharp corners, and holes waiting for trimming position A all need to be trimmed, such as figure 1 shown.

[0024] A method for trimming cow leather, comprising the following process steps:

[0025] 1. Prepare the wet blue leather, and carry out conventional squeezing, stretching, and shaving treatments on the wet blue leather, and the shaved thickness is controlled at 1.00-1.05mm;

[0026] 2, sewing: by sewing machine, the collagen fiber thread with intensity greater than 6 gram deniers is used as suture 14 to carry out the sewing operation that the pin code density is 5 needles / cm at position A to be trimmed in wet blue leather, and described sewing operation is Overlock sewing along the edge track of the position A of the wet-blue leather to be trimmed, such as image 3 As shown, the suture 14 locks the edge of the position A of the wet blue leather to be trimmed, which ...

Embodiment 2

[0050] A cowhide trimming method, the overall process steps are completely consistent with the embodiment 1, the difference is that the stitch density of the sewing operation is 6 stitches / cm.

[0051] Compared figure 2 , image 3 , Figure 4 The schematic diagram of trimming structure in figure 2 After adopting the existing technology to trim the position A of the wet blue leather to be trimmed, after repeatedly passing through the trimming line 11 for the first time, the trimming line 12 for the second time, and the trimming line 13 for the third time, the wet blue leather to be trimmed The trimming opening at position A is getting bigger and bigger, the trimming range is large, the integrity of the wet blue leather is low, and the overall stretch will be reduced in a large area, resulting in a lot of waste of leather materials; and image 3 , Figure 4 After the cowhide trimming method described in Embodiment 1 and Embodiment 2 of the present invention is used to trim...

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Abstract

The invention relates to the technical field of a process for producing cow leather and provides a method for trimming the cow leather capable of maintaining the integrity of hides and increasing the yield and utilization rate of the cow leather during the production process of the cow leather. The method comprises the following steps: preparing wet blue leather, squeezing water, uniformly shaving, sewing, re-tanning, dyeing, carrying out fat liquoring, drying, finishing, coating, trimming and warehousing the finished product. In the step of sewing, the sewed position is the to-be-trimmed position of the wet blue leather, namely, by sewing with a wire, the tearing strength of the to-be-trimmed position of the wet blue leather is increased and the phenomenon of secondary damage of the to-be-trimmed position of the wet blue leather under the actions of twisting in the steps of re-tanning, dyeing, carrying out fat liquoring and finishing is avoided. The method is also applicable to the production process of pigskin and sheepskin.

Description

technical field [0001] The invention relates to the technical field of cow leather production technology, in particular to a method for trimming cow leather. Background technique [0002] During the production and processing of leather, it is often damaged to varying degrees, or the thickness of the edge is not enough. These defects will cause greater damage to the leather due to stress concentration in the subsequent processing steps. In order to ensure the quality of finished leather and improve the yield of leather, trimming operations must be carried out. Trimming is to use manual or equipment to remove the unusable parts around the crust leather and affect the leather properties, such as gaps, nail holes, broken edges, wrinkled edges, curled edges, holes, etc., which can prevent further damage to the leather. [0003] In tanning production, trimming is generally required for 3 times or more. For yellow cattle shoe upper leather, trimming is required after splitting and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14B11/00C14C3/08C14C3/22C14C9/02C14C1/00C14C11/00D06P3/32
CPCC14B11/00C14C1/00C14C3/08C14C3/22C14C9/02C14C11/003D06P3/32
Inventor 孙辉永李小刚温会涛
Owner XINGYE LEATHER TECH CO LTD
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