Fabrication is a process that must be passed before weaving fabrics. The quality of fabrication and whether the fabrication method is reasonable to play a very important role in the smoothness of fabric production. Therefore, pay attention to the following issues during the installation process:
1. The front and rear positions of the healds are different on the machine
The height of the lift is different when the opening movement is performed. The lifting height of the front healds is relatively low, the loom is relatively stable when the healds are lifted, and the warp threads worn on these healds are less susceptible to warp breakage. The lifting height of the rear healds is relatively high, the loom vibrates greatly when the healds are lifted, and the warp threads worn on these healds are subject to great tension and are prone to warp breakage. Therefore, after determining the stitching method, it is also necessary to pay attention to that is, to decide which group of warp wires are threaded on the front heddle and which group of warp wires are threaded on the back heddle. Its determination rules are as follows:
a. When the fabric has only one warp combination, the heddles with more warp threads should be placed in front of the machine, and the heddles with fewer warp threads should be placed at the back of the machine so that the loom can run smoothly.
b. Compare the interweaving of warps with different lifting laws, and thread the warp with more lifting times on the front heald, and the warp with less lifting on the back heald, which can reduce the warp breakage.
c. When the fabric has two or more warp combinations, the warp with good wear resistance should be threaded on the back heald, and the warp with poor wear resistance should be threaded on the front heald.
2. Pay attention to the density of healds on each heald frame
Under normal circumstances, the number of healds to be used is determined after the fabric structure is selected, but sometimes the number of warps worn on each heald varies greatly. Some healds have only 1 to 2 healds per cm, and some There are more than a dozen healds per centimeter on the healds.
The density of the heald affects the difficulty of weaving. If the density is too large, the warp will be easily broken by the friction of the heald. Therefore, any loom has certain requirements for the density of healds on each heald when weaving. The water-jet loom requires that the density of healds generally does not exceed 12/cm, and the healds that require many times of lifting are required to have a density of healds. too small.
When the heddle drawing is determined, if it is found that the density of the healds on a certain heald is too high, it is necessary to consider using two healds to thread the warp with the same lifting pattern and pierce the two healds in a ratio of 1:1. , which keeps weaving running smoothly.