The structure of knitted fabrics is loose and easy to deform. During the printing production process, it is easy to lengthen in the warp direction and narrow in the weft direction. Fabric deformation will bring a series of problems in printing, resulting in weft skew.
Wrinkles and printing defects in the printing process of the printing process. Therefore, preventing and overcoming the series of problems brought about by the printing machine is the key issue to ensure the printing quality of knitted fabrics and the smooth progress of knitted fabric printing.
Considering the characteristics and problems of knitted fabric printing, a considerable number of printing and dyeing enterprises often try to explore and summarize the warp and weft deformation data and patterns of knitted fabrics on the printing machine before mass production. In the case of changes, the pattern is appropriately scaled when it is drawn and separated, such as the method of enlarging the pattern longitudinally and reducing the latitudinal direction.
When the knitted fabric is printed on the printing machine, the pattern printed is the longitudinally enlarged pattern and the weft-reduced pattern, and then when the tenter is arranged and shaped, the weft-stretching is to the finished door width, and the weft-widening is longitudinally shortened, so as to obtain In line with the size of the customer's sample pattern. There are many ways to do this, but in terms of solving the above problems of knitted fabric printing, this method cannot fundamentally solve the problem, because there are too many factors and variables that affect the deformation of knitted fabrics. Different enterprises have different equipment, the equipment operation status of each enterprise is different, and the operating characteristics of operators are not completely consistent.
If the variety of printed knitted fabrics is relatively single, the above method is still acceptable. If the printed knitted fabrics are of various types, with different thicknesses, different fabric tensions, and the knitted fabrics are scaled in the warp and weft directions, the shape conditions must be very different. If the above method is adopted, a lot of experiment and exploration will be done, which will bring certain difficulty and trouble to the operation.
In addition, when printing the same variety, the printing speed, pressure, fabric tension and other changes will affect the expansion and contraction of the fabric and affect the printing effect of the fabric. When printing knitted fabrics on the printing machine, it is necessary to ensure the printing effect of knitted fabrics, to prevent and overcome a series of problems caused by the easy deformation of knitted fabrics. , In addition to accurate flower alignment and clear printed outlines, the following measures and operations should also be taken:
(1) When the printed knitted fabric is input to the printing machine, it must be carried out under the condition of low tension or no tension. It is very important to keep the two sides of the knitted fabric input straight.
(2) The patch must be flat and firmly attached. To choose a good paste paste, grasp the operation of the paste, after the knitted fabric is put on the machine, paste it flat on the guide belt, and paste it firmly. This ensures that the knitted fabric does not move during printing, which is beneficial to the printing and the obtaining of the printing effect.
(3) Pay attention to and attach importance to drying equipment, and use high-capacity jet ovens. The jet oven is required to have the maximum steam circulation and the highest flow rate to reduce energy consumption. The finished printed knitted fabric is lifted from the end of the printing table and sent to the entrance of the oven, and is sent to the oven by the oven conveyor belt without tension to complete the fabric drying work and complete the printing task.
To do the above measures, in addition to paying attention to the printing operation, it is necessary to select the printing machine equipment. It is not easy to obtain satisfactory printing results by using the woven fabric tension feeding printing machine to print knitted fabrics.
In the past, as a fabric printing machine, more attention was paid to the accuracy of the printing part, the convenience of operation, and the satisfaction of the printing effect. When choosing a knitted fabric printing machine, in addition to paying attention to and paying attention to the above, it is also necessary to pay attention to the low input of the printed knitted fabric. Tension, no tension, to be able to absorb and stick the guide belt flatly, the drying equipment at the end of printing and feeding must also have low tension and no tension. Only with the combination of equipment suitable for knitted fabric printing and good operation can prevent , to overcome the series of problems caused by the easy deformation of knitted fabrics.