TWI412643B - Dyeing vessel - Google Patents

Description

Dyeing cylinder

The present invention relates to fabric nozzles for use in fabric treating machines, such as a jet dyeing machine.

In particular, fabric processing machines for jet dyeing machines use fluid jet nozzles to apply a processing fluid, such as a dye liquor, to and into the running fabric during the dyeing operation. In general, these nozzles have a fixed diameter passage for the fabric to pass through. As the fabric travels through the nozzle passage, the dye liquor is sprayed onto and into the fabric. Different types of fabrics have different densities and, therefore, have different volumes and diameters when forming a fabric rope during the dyeing process. A fabric cord having a large diameter is difficult to pass through a nozzle having a relatively small passage diameter. However, the use of a large diameter nozzle passage for a thin fabric rope can result in significant waste of dye liquor. Thus, if the use of a dyeing machine must dye different types of fabrics having different fabric densities, it is known to provide a set of complete fabric nozzles having different diameters and to match the nozzles with the best dyeing characteristics for the desired fabric pattern. However, the removal of a fabric nozzle and the installation of a different fabric nozzle is generally a time consuming process that results in significant machine downtime and thus reduced throughput.

It is an object of at least one embodiment of the present invention to provide an improved technique that utilizes a more simple manner than the aforementioned time consuming process to provide nozzle features Suitable for fabrics of different types and densities.

According to the present invention, there is provided a dyeing cylinder comprising a casing comprising a first fabric nozzle, a fabric passage for receiving a fabric rope to be dyed, and a removable second fabric engageable in the first fabric nozzle Fabric nozzles to provide a narrower fabric passage.

In a preferred embodiment of the invention, a removable third fabric nozzle can be mated within the second fabric nozzle to provide a narrower fabric passage.

In a preferred embodiment of the invention, a fabric nozzle assembly is provided which is an assembly of only five major components and which allows the channel diameter to be adjusted in a simple and time saving manner.

The easy-to-remove gate allows the user to select fabric passages of different diameters to suit the specific needs of each dyeing application. Removal and selection process reduces installation time and increases capacity.

The application of the presently described technology involves the ability to dye different forms of fabric, and the mode of operation associated with this technique will be described below.

Referring to Figure 1, a dyeing cylinder 1 comprises a housing having a side inlet tube 2 for dyeing liquid, allowing access to the hollow nozzle ring 3 surrounding the fabric passage and allowing the dye liquor to enter the passage via the nozzle gap 4. A gate extending upward from the nozzle ring 3 constitutes a main fabric nozzle (first fabric nozzle) 5. As shown in Figure 1, a second fabric nozzle 6 is mated within the main fabric nozzle 5. Moreover, a third fabric nozzle 7 is fitted in the second fabric nozzle 6.

The fabric string 8 shown in Figure 1 is passing through the passage in the dyeing cylinder 1.

A calibration opening 10 is provided in each fabric nozzle 5, 6, 7 to assist in the calibration of these components, such as a calibration/holding mechanism of a screw 9 being mated in the calibration opening 10.

The arrangement of the mating mating of the fabric nozzles 5, 6, 7 as shown in the drawings is such that the nozzle gap 4 is effectively passed through the mating second and/or third fabric nozzles 6, 7 into the main fabric nozzle 5. The ground extends, so that no matter how the fabric nozzles are mated, the dyeing liquid can be effectively introduced into the channel. Preferably, the rubber seals 11 are all provided adjacent to the nozzle gaps 4, which prevent leakage of the dye liquor, which may otherwise occur from the primary nozzles 5 and the second nozzles as a result of the dye liquid pressure inside the nozzle ring 3 Leakage between 6 or between the second nozzle 6 and the third nozzle 7. The discharge passages 12 are each provided in the second and third nozzles 6, 7 to allow the splashed dye liquid that has entered the nozzles 5, 6, 7 to be discharged into the passage.

In the first mode of operation, it is desirable to dye a light fabric having a very low density. When dyed in the form of a rope, low density fabrics typically have a smaller fabric rope diameter than higher density fabrics. In this dyeing process, the three fabric nozzles 5, 6, 7 are all mounted inside the dye cylinder 1 which can be of any suitable shape. The dyed fabric is in the form of a fabric cord 8 which is circulated through the dye cylinder 1 via a fabric passage during the dyeing process. The dyeing liquid enters the dyeing cylinder 1 via the side inlet tube 2 and fills the hollow nozzle ring 3 of the main fabric nozzle 5. Pressure is then established in the nozzle ring 3, and accordingly, the dyeing liquid is discharged from the first nozzle gap 4a of the main fabric nozzle 5 into the second nozzle gap 4b of the second fabric nozzle 6, and then into the third fabric nozzle 7 In the three nozzle gap 4c, the first, second and third nozzles The gaps 4a, 4b, 4c are aligned and fixed to each other to form the nozzle gap 4, and finally are ejected into the ejection zone 15 of the passage adjacent to the nozzle gap 4, and are incident on and into the fabric string 8. As shown in FIG. 1, the second and third fabric nozzles 6 and 7 are located above the spray zone 15. As previously described, the dyeing liquid is prevented from leaking between the fabric nozzles 5 and 6 and between the fabric nozzles 6 and 7 via the seal 11.

In the second mode of operation, for an intermediate fabric having an intermediate density higher than the first mode of operation, and thus having a larger fabric rope diameter, as shown in Figure 2, the third fabric nozzle 7 is removed Provides a larger diameter fabric passage. This can be achieved simply by removing the screw 9 from the self-calibrating opening 10 so that the third fabric nozzle 7 can slide out of the throat of the second fabric nozzle 6. The screw 9 is then placed again in the calibration opening 10, and both the primary fabric nozzle 5 and the second fabric nozzle 6 are calibrated and secured together.

In the third mode of operation, suitable for use with heavier fabrics having a higher density, and thus having a larger fabric rope diameter, the second nozzle 6 can also be removed in a manner similar to that described above, resulting in The result of the configuration of Figure 3. This provides a fabric passage of larger diameter.

As can be seen from the drawings, the hollow nozzle ring 3 is shown to have a non-uniform cross-sectional area, with the chamber on the left side of the drawing being larger than the chamber on the right side. In a plan view, it can be seen that the nozzle ring 3 is defined by two eccentric circles (i.e., non-concentric circles), and the left side has a volume larger than the right side. This is a preferred feature because it overcomes the problem of uneven pressure created by a uniform and symmetrical nozzle ring. In this case, there is a pressure drop on the right side of the nozzle ring due to the large distance from the side inlet tube 2. This will cause dyeing Uneven injection of liquid. With the asymmetrical design shown in the drawings, since the nozzle ring has a small volume from the left side to the right side, the pressure can be balanced, and as such, results in a more even distribution of the dyeing liquid.

In the foregoing preferred embodiment, a three fabric nozzle can be used in the dyeing cylinder. However, it is clear that in alternative designs, as few as two nozzles or four or more nozzles may be provided in place of the three fabric nozzles. The principles of the foregoing techniques will remain unchanged.

1‧‧‧ dyeing tank

2‧‧‧Side entrance tube

3‧‧‧ nozzle ring

4‧‧‧Nozzle gap

4a‧‧‧First nozzle gap

4b‧‧‧Second nozzle gap

4c‧‧‧ third nozzle gap

5‧‧‧Main fabric nozzle (first fabric nozzle)

6‧‧‧Second fabric nozzle

7‧‧‧ Third fabric nozzle

8‧‧‧Woven rope

9‧‧‧ screws

10‧‧‧ Calibration opening

11‧‧‧Seal

12‧‧‧Drainage channel

15‧‧‧Spit area

The invention will now be further illustrated by way of example only, in which FIG. 1 is a cross-sectional view of a dyeing cylinder comprising primary, second and third fabric nozzles in accordance with an embodiment of the present invention; Similar to the pattern of Figure 1, but the third fabric nozzle is removed; and Figure 3 is similar to the Figures 1 and 2, but the second and third fabric nozzles are removed.

1‧‧‧ dyeing tank

2‧‧‧Side entrance tube

3‧‧‧ nozzle ring

4‧‧‧Nozzle gap

5‧‧‧Main fabric nozzle

6‧‧‧Second fabric nozzle

7‧‧‧ Third fabric nozzle

8‧‧‧Woven rope

9‧‧‧ screws

10‧‧‧ Calibration opening

11‧‧‧Seal

12‧‧‧Drainage channel

Claims (10)

A dyeing cylinder (1) comprising a casing comprising a first fabric nozzle (5) having a fabric passage for receiving a fabric rope (8) to be dyed, and a removable second fabric nozzle (6) ) having different diameters disposed above the first fabric nozzle (5) and the spray zone (15) in the fabric channel to allow the fabric channel to be sized and the second fabric nozzle (6) The nozzle gap (4b) is aligned with and fixed to the first nozzle gap (4a) of the first fabric nozzle (5) to form a nozzle gap (4) extending toward the spray zone (15) for providing constant fluid pressure and Flow rate and smooth jet profile. A dyeing cylinder (1) as claimed in claim 1 includes a removable third fabric nozzle (7) that can be mated within the second fabric nozzle (6) to provide a narrower fabric passage. For example, the dyeing cylinder (1) of claim 1 includes a calibration and fixing mechanism (9, 10) for calibrating and fixing the fabric nozzle. A dyeing cylinder (1) according to claim 3, wherein the calibration and fixing mechanism comprises a calibration opening (10) in the fabric nozzle and a screw (9) for mating in the calibration opening (10). A dyeing cylinder (1) according to claim 1 which comprises a fabric nozzle ring (3) in the outer casing for receiving and distributing the dyeing liquid, and a nozzle gap (4) provided by each fabric nozzle, It is used to allow the dyeing liquid to be sprayed on the fabric rope (8). The dyeing cylinder (1) of claim 5, wherein the fabric nozzle ring (3) has an uneven cross-sectional area to balance the fabric nozzle The pressure of the dyeing liquid in the ring (3). A dyeing cylinder (1) according to claim 5, wherein when the fabric nozzles are all mated together, the nozzle gaps (4) of each fabric nozzle are aligned to form a continuous nozzle gap. A dyeing cylinder (1) as claimed in claim 1 includes a sealing mechanism (11) between the fabric nozzles. A dyeing cylinder (1) as claimed in claim 1 includes a discharge mechanism (12) provided in the fabric nozzle to allow discharge of the dye liquor to occur between the fabric nozzles. A dyeing cylinder (1) according to any one of claims 1 to 9, wherein each fabric nozzle has a circular cross-section of a fabric passage.