JPS6030383B2 - Preheating device for dye fixing machine for knitted fabrics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a steam chamber in a dyeing apparatus in which a dye is attached to a striped fabric in the form of a canvas, and the dye is passed through a steam chamber under atmospheric pressure or pressure in a wet state to continuously fix the dye. The present invention relates to a device for preheating striped fabric at the entrance of the machine.

Conventionally, various devices and methods have been used for dyeing textiles.

In particular, currently, as in wince and jet dyeing, knitted fabrics are made into ropes and immersed in a dye bath, and each piece is dyed by repeating circulation in the bath.

That is, in the above-mentioned dyeing in each tank, since dyeing is carried out in each m tank, variations in the product are likely to occur.

'21 The amount of dyeing liquid used for dyeing is more than 7 times the weight of the knitted fabric, and if it is less than this, dyeing spots are likely to appear.

A large amount of waste liquid is produced when changing the leg color.

'4) A lot of thermal energy is required to heat the beam liquid.

■ After dyeing, it must be spread again in the next processing step. As mentioned above, rope-shaped dyeing leaves many technical points to be improved in terms of resource saving, energy saving, uniform dyeing, continuous processing, etc.

Conventional continuous dyeing devices are mainly used for fabrics, and are limited to machines that do not cause any problems even when tension is applied to the fabric during the dyeing process.

The present invention is applicable to all types of knitted fabrics, and moreover, aims to shorten the time required for dyeing by treating the knitted fabrics with the least tension, and to uniformly dye even thick cotton fabrics.

To explain this invention with reference to the embodiments shown in the accompanying drawings, in FIG. 1, a plurality of cylinders 8, 9, 10, 11, and the surface temperature of the cylinder is adjusted appropriately according to the paper fabric to be treated by using hot water, compressed steam heat-resistant oil, etc. from inside the cylinder, and taking into account the thermal properties of the striped fabric. The surface speed of the cylinder was adjusted to minimize the tension caused by thermal expansion and contraction of the striped fabric. The best results were obtained by arranging these cylinders next to each other so that the gap between the cylinder surfaces was less than 2 yards wide.

In FIG. 2, the green fabric a introduced into the steaming chamber contains a low-temperature dyeing liquid b that is 1 to 3 times its weight, so that the steam in the steaming chamber 5 immediately begins to condense on its surface.

This condensed steam forms a thin hot water film c on the surface of the bran fabric and covers the surface of the beam liquid in the striped fabric.

However, since the hot water itself is thermally nonconducting, it cannot immediately raise the temperature of the beam liquid b in the green fabric a, so it flows on the surface of the green fabric a, and in this case, the beam liquid also flows out.

As shown in Fig. 3, when the knitted fabric a is transported by the cylinder 8 whose inside is heated, the striped fabric a is lightly pressed against the cylinder 8, so that the hot water c from the condensed steam is transferred to the knitted fabric a. Since it is pushed into the interior and mixed uniformly with the dye solution b, rapid overflow of the striped fabric a and the dye solution b is possible.

A detailed embodiment of this invention will be explained with reference to FIGS. 4 to 6. The bran fabric a passes through guide rolls at the entrance and is immersed in the dye liquor tank 1, and is then uniformly stamped by a squeezing roll 2 such as a rubber roll pressurized by an air seeder 3, and is dyed with an appropriate beam liquor. It is introduced into the Aoi heat chamber 5.

The amount of liquid applied to the striped fabric is a little, just right, but depending on the structure and material of the bran fabric, the dyeing may be uneven, so generally the amount is around 100% compared to the weight of the knitted fabric, and it is a special item. In some cases, it reaches 500%.

The striped fabric uniformly impregnated with the dye liquor by the squeezing roll 2 enters the buffer zone at the entrance of the Juho heating chamber 5. The buffer zone is a slit 4a that opens in the width direction of the wire fabric.
A wind box 4 having a diameter is provided on both sides, and the wind boxes are gathered to the left and right and then connected to an exhaust pipe 6.

Outflowing steam in the steaming chamber 5 and outside air are mixed and discharged through the slit 4a, the wind box 4, and the exhaust pipe 6. 7 is a striped fabric spreading device in which the screw type expander and guide roll are aligned, and at this point the knitted fabric is completely spread to both ends, and then immediately heated to the heating cylinder 8.
send to.

Reference numerals 9, 10, and 11 are heating cylinders, which are arranged with a gap of less than 2 mbars between adjacent surfaces, and each cylinder uses about half of its circumference for heating the knitted fabric.

The surface temperature of the cylinders 8, 9, 10, 11 is regulated by valves 24 on each side, and each cylinder is driven by a drive device 25.
By adjusting these, the tension applied to the knitted fabric can be minimized for all knitted fabrics.

Note that 26 in the figure is a thermometer that moves with the valve 24. When conveying a knitted fabric while being heated by the surface of these cylinders, the knitted fabric is designed so that it does not adhere to the cylinder surface and lose its ability to expand and contract.

If the length of these 8, 9, 10, and 11 cylinder groups in contact with the surface of each cylinder is too large, it will be impossible to convey the line fabric freely as described above, so in this case, the number of cylinders should be reduced. Sometimes it's about two pieces.

The rope fabric is thus heated by heating cylinders 8, 9, 10,
The boiling water that condensed on the surface of the knitted fabric is forced into the beam liquid while being conveyed to about half of the outer periphery of the knitted fabric, and is heated repeatedly, and the tension during conveyance is kept to a minimum, so it is easily and evenly distributed. Warmth is applied to the chicks and beams, and on the other hand, the curls of both ends of the knitted fabric are temporarily set, and at the end of this cylinder group, the ends of both ends of the knitted fabric are not curled, as in the plain weave.

In this way, the rope fabric is heated uniformly by the child heating device and sent out in a stable form.The next step is to install a retention device and reduce the tension as much as possible to 0.5~5.
It will steam for a minute.

In Fig. 4, 12 is a delivery frame car (reel);
Two examples of the shape of the retention part are illustrated. The direction a is a method in which the material is placed in a wave shape on the conveyor 13 and stays there, and the direction a2 is a method in which it is made to stay in a loop shape.

When knitting fabric is applied in the direction a2, a large number of bars 14 for suspending rope fabrics are installed in groups on a chain conveyor 15 that circulates in parallel on the side of the steaming chamber, and the reel 1 is placed on the bar.
The knitted fabric sent out from 2 is looped.

The length of the loop is less than 80 long for knitted fabrics and 200 long for woven fabrics. Steam generators are installed on both sides of the heat chamber. That is, 20 is a steam generation box, and 19 is a steam blowing pipe, which are provided long in the direction of movement of the knitted fabric in the middle of the side of the steaming chamber. The saturated steam or superheated steam blown in from the pipe 19 gradually descends from the ceiling of the steaming chamber and steam-heats the bran fabric a2 or a, after which one is discharged to the outside from the exhaust pipe 23 and the other steam flows to the inlet. The knitted fabric is heated and discharged from the exhaust pipe 6.

The wire fabric a sent out from the preheating device in this way is a
The dye sent in the direction a2 is completely fixed with dye on the conveyor 13 and sent out to the outside of the steaming chamber by the pull-out roll 22, and the dye sent in the direction a2 forms a loop on the bar 14. After fixing the dye during this time, it is sent out of the steaming chamber by a take-up roll 21 and a pull-out roll 22.

Regarding the steam blown in from the pipe 19, in the case of saturated steam, it is sufficient to send it directly from the boiler, and the steam should be 160 to 180 oo
When steaming with superheated steam, the steam sent out from the boiler is heated to about 24,000 ℃ using a specially installed superheating device, and then the steam is directly blown into the boiler.

This case is not shown.

To further explain the function of the present invention, {11] As explained earlier in FIG. 3, the knitted fabric can be heated quickly and uniformly.

[21 Provides a thermal stabilizing effect on the striped fabric.

In particular, to prevent staining during dyeing, or to knit fabrics that have both ends rolled up in the width direction, the surface temperature of the cylinder 8 can be set according to the fiber material to achieve heat setting. In the next step, the shape is temporarily set, and the inconvenient local movement of the beam liquid is eliminated, so that uniform dyeing can be achieved.

The surface temperature of the cylinder 8 is within the range of 80 to 14 degrees Celsius when dyeing is carried out at 100 to 120 degrees Celsius in a steam room, and 140 to 2 degrees when dyeing is carried out at 160 to 18 degrees Celsius in a steam room.
00 qo is suitable, and the time that the bran fabric is in contact with the surface of the cylinder is 5 to 2 qo.

The selection of the above-mentioned surface temperature and the setting of the contact time mainly depend on the weight and weight of the total fabric, the structure, and the amount of coating liquid.

'31 Rapid and uniform dye fixation can be obtained.

The most important thing in the preheating process is to apply uniform dye to the striped fabric and to apply it quickly and uniformly while preventing scales, and the condition for uniform dyeing is that this process is carried out perfectly. To completely fix the dye, a tension-free retention section of the striped fabric is provided separately from the heating device, and the striped fabric is steamed for 0.5 to 5 minutes.

The effects of the present invention will be described below.

{1} When the knitted fabric is sent to the steaming chamber, a large amount of condensed hot water flows out along with the dyeing liquid without the heating device, but by installing the heating device, the flow of liquid was reduced to less than half (savings). Resources) [2] Reduction of dye fixation time The dye fixation time was shortened by 40 to 50% because the knitted fabric and the beam liquid contained therein were heated uniformly and quickly.

{3} Continuous dyeing of knitted fabrics with curls on both sides is now possible.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional front view of the present invention, FIGS. 2 and 3 are explanatory diagrams of the operation of the present invention, FIG. 4 is a vertical sectional front view of another embodiment of the present invention, and FIG. 5 is the same as that of FIG. A cross-sectional view taken along the line V-V, and FIG. 6 is a bottom view of the cross-section taken along the line W-stroke in FIG. a... Knitted fabric, 1... Dye bath, 2... Squeezing roll, 3... Air shilling, 4... Wind box, 4a... Slit, 5... Swallow fever Chamber, 6... Exhaust pipe, 7... Expanding bag direct, 8, 9, 10, 11... Heating cylinder, 12... Delivery frame car, 13... Conveyor, 14... Bar, 15... Chain conveyor. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 Figure 4

Claims (1)

[Claims] 1. A knitted fabric a in which a plurality of heating cylinders 8, 9... are placed with a slight gap in a steam chamber 5 to which atmospheric pressure or slight pressure is applied, and a dye is attached to the group of heating cylinders. A dye fixing machine for knitted fabrics, characterized in that the heating cylinders are arranged side by side so as to be pressed together by approximately half circles alternately, and are provided with means for adjusting the surface temperature and rotation speed of each heating cylinder of the heating cylinder group. preheating device. 2. A steaming chamber 5 was provided next to the dye bath 1 and squeeze roll 2 for supplying dye to the knitted fabric, and within the steaming chamber 5 a plurality of heating cylinders 8, 9... and then a retention device were provided. In an apparatus for dyeing knitted fabrics, the heating cylinders 8, 9... are arranged side by side with a slight gap between them so that the knitted fabric a with the dye attached to the heating cylinder group is alternately pressed by approximately half a circle,
A preheating device for a dye fixing machine for knitted fabrics, comprising a group of heating cylinders so that the surface temperature and rotation speed of each heating cylinder can be adjusted respectively.