Type of jet dyeing machine
HTHP overflow jet dyeing machine
In order to adapt to the high temperature and high pressure rope dip-dyeing process of some synthetic fabrics, the atmospheric pressure rope dip-dyeing machine is placed in the horizontal pressure resistant pot body at first, and the high temperature and high pressure dyeing is carried out under the sealed state. However, the fabric is easy to tangle in operation, and the treatment of lowering pressure and opening cover is very inconvenient, and the dyeing effect is not good enough.With the increase of the yield and variety of synthetic fiber and its blending, interwoven knitted fabric and woven fabric, the rapid development of high temperature and high pressure loose rope intermittent dyeing machine was promoted in the mid-1960s. Because this kind of dyeing machine forces the dyeing liquid to flow in the machine by circulating pump, and pushes the fabric movement, so it is called liquid flow dyeing machine.There are many types of such dyeing machines, which are still in continuous improvement and development; The development of the general situation is the use of dye overflow action, spray action and designed into overflow, spray type, spray plus overflow, and so on. From the bath ratio size trend, is to small bath ratio development. Because many dyeing machines have their own characteristics for fabric varieties and dyeing processes, they are currently being improved and developed in coexistence.
HTHP jet dyeing machine
Since GastonCounty exhibited the first high temperature and high pressure jet dyeing machine in 1967, various types of jet dyeing machines have appeared successively, and the development is more rapid in recent years. The idea of dyeing with jet and liquid flow driving the movement of fabric was to help the dyeing liquid penetrate into the rope-like fabric, accelerate the dyeing effect of dye on fiber, reduce the bath ratio, and get better dyeing effect. There are many types of high temperature and high pressure jet dyeing machines, which can be divided into tank type and pipe type.
Improvement and development trend of jet dyeing machine
Overcome bubbles
As previously mentioned, such machines tend to have a small bath ratio whereas the foam produced during dyeing does not differ knat at the quality of the dye and is prone to tangling of the fabric, one of the major drawbacks of semi-full jet dyeing machines, which can be addressed by the addition of an antifoaming agent.In recent years, the nozzle of many semi-filled jet dyeing machines is fully submerged, which can effectively prevent the air from entering the nozzle and producing foam. In addition, there are also equipped with a bypass pipe, the foam in the storage pipe is led out, or the combination of overflow and spray nozzle liquid sealing device, to reduce the foam has a certain positive effect.
Prevent tangles
In the process of running in the machine, the rope fabric can not be dyed normally because of irregular piling, twisting, tangling and even tearing. In recent years, in order to prevent fabric twisting and tangling, the following measures have been adopted: the tank type jet dyeing machine adopts a cloth lift, so that the fabric has a chance to shake loose before entering the nozzle.For the jet dyeing machine with faster fabric running speed, the distance between the roller and the liquid level is also slightly increased. The nozzle section tends to be rectangular and has a certain spreading effect. It is reasonable to design a rectangular section of the cloth guide tube behind the nozzle, which can eliminate the spiral twist of the fabric caused by the eddy current of the dyeing liquid, reduce the hydraulic loss caused by the eddy current of the dyeing liquid, and is conducive to uniform dyeing. When the rope fabric self-guiding cloth tube falls into the cloth storage tube, the pneumatic manipulation device is used to make the fabric pile neatly and regularly.
Reduce creases
In jet dyeing, it is easy to produce longitudinal and transverse creases, which is related to the longer extrusion time of fabrics in the dyeing process. Therefore, it is beneficial to reduce creases by taking measures to improve the running speed of the fabric for tank and pipe dyeing machines, so that the relative extrusion position can be changed at an interval of about 1~2min.Also in the cloth storage groove using a horizontal cage or shaft drum for low speed rotation, reduce the fabric by gravity extrusion. In addition, a cloth feeding device similar to a conveyor track can also be used, or the porous cloth storage groove in the pipe type cloth storage pipe can be oscillated up and down. It is worth noting that some dyed woven fabric congestion, creases are often related to the self-priming height of the circulating pump, must be selected or designed appropriately.
Avoid bruising
Fine sensitive fabrics are often easily scraped by jet dyeing. In recent years, the measure of overflow and spraying is generally adopted to reduce the nozzle pressure and make the fabric not easy to scratch. Also can USE the runner, the drum, or in the fabric at the bottom of the storage groove contact wall using PTFE board or coating, or use stainless steel conveyor belt, to avoid fabric abrasion has a certain effect.
Post time: Apr-06-2023