KR100672286B1 - Machine and process for the continuous decatizing and stabilizing of a fabric - Google Patents

Abstract

A machine for the continuous decatizing and stabilizing of a fabric (6) comprises a cylindrical drum (1) having a side wall (2) around which are wrapped a first blanket (5), the fabric (6) and a second blanket (7), rollers (8, 10) for moving the second blanket (7), a sealed chamber (12) that contains saturated steam at preselected pressure and temperature for impregnating the fabric (6) and is located in a first preselected peripheral region of the drum (1), on the outside of and close to the side wall (2), and a device (40; 140) capable of forming a stream of air for stabilizing the fabric (6); the device (40; 140) is located in a second preselected peripheral region of the drum (1), on the outside of and close to the side wall (2), and the stream of air formed by the device (40; 140) flows in a substantially tangential direction with respect to the side wall (2) of the drum (1). <IMAGE>

Description

Machine and process for continuously deketizing and stabilizing knitted fabrics {Machine and process for the continuous decatizing and stabilizing of a fabric}

1 is a cross-sectional view of a machine for continuously deketizing and stabilizing knitted fabrics implemented according to the present invention.

FIG. 2 is an enlarged partial view of a cylindrical drum and chamber containing vapor of the machine shown in FIG.

3 is a partial view showing a cross section of the III-III plane of FIG.

4 is a partial view illustrating a cross section of the IV-IV plane of FIG. 1.

FIG. 5 is a partially enlarged view of a device that can form an air stream forming part of the machine shown in FIG. 1; FIG.

FIG. 6 is a partial view illustrating a cross section of the IV-VI plane of FIG. 1.

FIG. 7 is a partially enlarged view showing the opening of the air shown in FIG. 5.

8 is a view showing a modification of the machine shown in FIG.

The present invention relates to a machine and process for continuously deketizing and stabilizing knitted fabrics. Fabrics piece processing is known to be finished by certain final treatments to ensure that the knit fabric has the desired technical and aesthetic properties, such as dimensional stability, soft feel and a good appearance.

One of the final treatments for wool or blended knitted fabrics is known as decatizing, which treats the knitted fabric with saturated steam at a predetermined pressure and temperature and also stabilizes it by quenching.

EP-B1-0 293 028 implements a machine for continuously deketizing knitted fabrics, the machine having a cylindrical sidewall covered by a textile sleeve forming a first blanket. A drum. The knit is partially wrapped around the sleeve and the second fabric blanket is partially wrapped around the knit. The machine also includes means for moving and pulling the second blanket to compress the knitted fabric against the side wall and sleeve of the drum. The machine also includes a sealed chamber containing saturated steam at a predetermined pressure and temperature for impregnating and deketizing the knitted fabric. The chamber is located at a periphery proximate to the outside of the drum.

Knitting not wrapped by the drum is quenched in a cylinder located on the drum to stabilize. The cylinder has perforated sidewalls partially wrapped with a knitted fabric and also has internal holes connected to the inhaler. The inhaler draws air in from the outside, forming a radial air flow from the outside towards the center through the knitted fabric and through the perforated walls of the cylinder. Therefore, the temperature of the knitted fabric decreases rapidly and becomes stable.

EP-B1-0 533 295 implements a machine for continuously deketizing and cooling a knitted fabric, the machine comprising a rotating cylindrical drum and a fixed inner cylinder coaxial with the drum. The cylindrical drum includes perforated sidewalls covered by a sleeve made of a fabric material forming the first blanket. The knit is partially wrapped around the sleeve and the second fabric blanket is again partially wrapped around the knit. The machine also includes means for moving and pulling the second blanket to compress the knitted fabric against the side wall and sleeve of the drum. The fixed inner cylinder includes a side wall radially spaced from the side wall of the drum and having a perforated portion formed therein. The space between the inner and outer surfaces of the drum divided into two sealed inner chambers is between the two side walls. One inner chamber contains, through the perforated walls of the drum, saturated steam at a predetermined pressure and temperature that impregnates the knit fabric for deketizing the knit fabric. Another inner chamber is located around the perforated portion of the wall of the inner cylinder and is also connected to the inhaler. The inhaler draws air in from the outside, forming a radial air flow from the outside towards the center through the knitted fabric and through the perforated walls of the drum and cylinder. Therefore, the temperature of the knitted fabric decreases rapidly and becomes stable.

The two machines described above are complex and costly to build, install, maintain and operate. It is an object of the present invention to provide an improved machine and improved method as compared to conventional machines, methods for continuously deketizing and stabilizing knitted fabrics.

In a first aspect, the present invention relates to a machine for continuously deketizing and stabilizing a knitted fabric, the machine comprising: a) sidewalls wrapped with a first blanket of woven material, and a second blanket of woven and woven material; Having cylindrical drum,

b) means for moving and pulling said second blanket to compress said knitted fabric against said first blanket and said sidewall of said drum,

c) a sealed chamber connected to said drum and containing saturated steam at a predetermined pressure and temperature for impregnating said knitted fabric, said sealed chamber being located at said first predetermined periphery of said drum proximate to the outside of said side wall;

d) a device capable of forming a flow of air to stabilize the knitted fabric

Including;

e) the device capable of forming an air stream is located in a second predetermined peripheral portion of the drum proximate to the outside of the sidewall,

f) an air stream formed by the device is substantially tangential to the side wall of the drum.

Advantageously, the second periphery is located immediately after the first periphery with respect to the direction of travel of the knitted fabric.

In particular, the air port is provided on the outside of the second blanket and is substantially in tangential contact with the second blanket.

The air apertures are also substantially rectangular and have a predetermined width and length, the length of which is substantially equal to the length of the drum.

Preferably, the device comprises a plurality of openings for the air installed side by side and has air holes spaced apart by a predetermined distance on the outside of the side wall of the drum.

Advantageously, the air holes are provided on the outside of the second blanket and are substantially in tangential contact with the second blanket.

In one embodiment, the air opening is connected to an air intake and can suck air to form the flow.

In another embodiment, the air opening is connected to an air blower and may inject air to form the flow.

In particular, the opening is connected to the inhaler or the blower by respective pipes and manifolds and respective vehicles.

Advantageously, said first blanket is a sleeve covering said drum.

Preferably, the chamber has the shape of a semi-cylindrical tank in which longitudinal semi-circular seals are installed, since the longitudinal seal is pressed by an air tube, so that one side of the chamber and the other side of the chamber are pressed. The leakage between the second blanket, the knitted fabric, the first blanket and the side wall of the drum is prevented, but since the semicircular seal is pressed by an air tube, the semicircular edge of the tank is on one side and the other on the other side. Leakage between the second blanket, the knitted fabric, the first blanket and the semicircular edge of the side wall of the drum is prevented.

In addition, a semi-cylindrical sheath surrounds the tank, and the sheath forms an interspace containing additional steam that holds the tank at a temperature sufficient to prevent condensation of the vapor present in the chamber.

Preferably, the chamber is located in two quadrants of the drum, and the chamber extends around an arc of a circumference corresponding to an angle of about 180 degrees.

Advantageously, the air openings are substantially concentric with the drum and distributed around an arc of a predetermined circumference.

In particular, the air opening is provided around an arc of a circumference corresponding to an angle of about 45 degrees.

Preferably, the air opening is located in the quadrant immediately after the quadrant in which the chamber is located.

In a second aspect, the present invention

Iii) wrapping said knitted fabric around the side wall of a cylindrical drum,

Ii) treating the knitted fabric with a saturated steam of a predetermined pressure and temperature at a first peripheral portion of the drum proximate the outside of the sidewall,

Iii) treating said knitted fabric with a stabilizing air stream

Including,

Iii) in step iii) the air flow is formed in a second periphery of the drum proximate the outside of the side wall, and the air flow is substantially tangential to the side wall. The present invention relates to a process for deketizing and stabilizing knitted fabrics.

The process and the deketizing treatment carried out by the machine according to the invention have unexpected results.

Although the reasons for these results are not clearly understood,

1. The sidewalls of the drum being heated from the inside supply the entirety of the second blanket, the knitted fabric and the first blanket, with the heat necessary to promote vaporization of moisture and to speed the drying of the knitted fabric, which is an important factor in stabilization.

2. The stabilizing air stream is heated by the heat radiated from the sidewalls of the drum, thereby improving the ability to remove residual moisture from the combination of the second blanket, knit fabric, and the first blanket.

3. In addition, in certain cases where the flow of air is produced by the inhaler, the intake of air creates a vacuum inside the opening such that it creates a thrust in the opening for the second blanket, the knitted fabric and the first blanket as a whole. ; As a result, the pressure delivered to the knitted fabric moderately increases the squeezing action, which has an important function in stabilization.

I think because.

The results obtained above are phenomenal, given that the person skilled in the art had the opinion that the stabilization step should be carried out by flowing air almost perpendicularly to the knitted fabric through the fabric piece.

At the same time, the machine according to the invention has a simple, compact and economical structure. This reduces configuration, installation and maintenance costs. This also means that the deketizing process can be performed in a short time with a moderate impact on running costs.

The features and advantages of the invention will be described with reference to the embodiments depicted by a non-limiting example in the accompanying drawings.

1-4 show a machine for continuously deketizing and stabilizing a knit. The machine comprises a cylindrical steel drum 1. Drum 1 includes bases 3 to which side walls 2 and axial hubs 4 are fixed. Drum 1 is supported by hub 4 to rotate within frame 17. Wall 2 consists of a solid steel sheet and is heated by the steam inside. Wall 2 is covered by a sleeve 5 of woven material, which constitutes the lower blanket. Knit 6 is supplied (not shown) by a motorized roller and wrapped around sleeve 5 of drum 1 with an upper blanket 7 of woven material. Knit 6 and blanket 7 are moved to drum 1 by roller 8 with motor. Roller 9 guides knitted 6 released from cylinder 1 toward the conveyor belt (not shown), which moves knitted 6 toward the plaiter (not shown). The blanket 7 is released from the sleeve 5 of the drum 1 by a roller 10 with a motor, and the blanket 7 also leads to circulating a closed loop partially indicated by tension rollers as indicated by 11. do. The roller 10 has a greater angular velocity than the roller 8 so that a predetermined tension is applied to the blanket 7 and the blanket 7 compresses the knit 6 against the sleeve 5 of the drum 1. Drum 1 is equipped with a motor and rotates at the same peripheral speed as roller 8.

Knit 6 and blanket 7 are wrapped around drum 1, where the portion of knit 6 and blanket 7 contacting the cross-sectional circle of drum 1 becomes an arc portion corresponding to an angle of about 270 degrees from the cross-sectional circle. Sleeve 5 and blanket 7 are made of sewn felt, for example made of polyester and Nomex (Nomex ^™ , Group Kevlar ^™ aramid fibers).

A sealed semicylindrical chamber 12 containing saturated steam at a predetermined pressure and temperature is located at the lower periphery of drum 1 proximate the outside of the side wall. The chamber 12 is formed by a semicylindrical tank 13 having longitudinal scraping seals 14 and 15 and semicircular scraping seals 16. Since the longitudinal seals 14 and 15 are pressed by the air tubes 18 and 19, between the tank 13 on one side and the entire semicircular edge of the blanket 7, knit 6, sleeve 5 and side wall 2 of the drum 1 on the other Leakage is prevented (Figures 3 and 4). Semi-cylindrical chamber 12 is located in the two lower quadrant portions of drum 1 in the cross-sectional circle and chamber 12 extends around an arc of a circumference corresponding to an angle of about 180 degrees. The steam is fed into chamber 12 through manifold 21, pipes 22 and 23, and three pipe sets 24 and 25, which are connected opposite one another on chamber 12. Pipes 24 and 25 end in longitudinal channels 26 and 27. Channels 26 and 27 are equipped with baffles 28 and 29, which cause separation of the vapor condensate, and channels 26 and 27 are connected to drainage pipes 30 and 31, the discharge pipes 30 and 31 being the condensation Move the sieve to the discharge pipe 32.

Saturated steam is sent to chamber 12 which can adjust the change from atmospheric pressure corresponding to a temperature of about 100 ° C. to a maximum relative pressure of about 2.8 to 3.0 bar corresponding to a temperature of about 142 to 144 ° C.

The semi-cylindrical lid 33 surrounds the tank 13 and the lid 33 forms a pocket 34 containing additional steam which retains the steam present inside the chamber at a temperature to prevent condensation of the steam.

Steam is fed into the gap 34 via pipes 35 and pipe sets 36 and 37 which are connected to the gaps on opposite sides of each other. The discharge pipe 38 collects the condensate formed in the gap 34.

Semi-cylindrical tank 13 and semi-cylindrical cover 33 are mounted on frame 17.

An inhalation device 40 capable of forming an airflow for stabilizing knitted fabric 6 is located in the upper periphery of drum 1 proximate to the outside of sidewall 2. The device 40 comprises a suction opening 41 which is connected with the air intake 46 by a pipe 43, a manifold 44 and a conveying duct 45. Inhaler 46 is in the form of a blower or an air pump.

Opening 41 has an inlet port 42 proximate to sidewall 2 of drum 1 and in close contact with blanket 7 (FIGS. 5-7). Each inlet 42 is substantially rectangular and has a predetermined width and length, the first inlet being the circumferential direction of drum 1 and the second inlet being the longitudinal direction of drum 1. The length of each inlet 42 is substantially the same as the length of drum 1.

The suction device 40 is located in the periphery following the periphery where the chamber 12 is located relative to the direction of travel of knitted fabric 6. In particular, the suction opening 41 is located in the quadrant immediately after the quadrant in which the chamber 12 is located, and is provided around the arc of a circumference corresponding to an angle of about 45 degrees from the cross-sectional circle of the drum.

When the machine is running, knitted fabric 6 wrapped around drum 1 is impregnated by the vapor from chamber 12. The knitted portion impregnated by the steam passes directly underneath the inhalation device 40, where the opening 41 connected to the inhaler 46 draws air from the surroundings and forms a substantially tangential flow of air to the side wall 2 of the drum 1. The even flow of air evenly spread across knit 6 results in a sharp drop in temperature which acts to remove moisture remaining in the knit and to stabilize the knit. In this way, the knitted fabric has desirable technical and aesthetic properties such as dimensional stability, soft feel and a good appearance.

FIG. 8 shows a variant of the deketizing and stabilizing machine of FIG. 1, the same parts being indicated by the same numbers. In this case the blowing device 140 is in close proximity to drum 1. Blower 140 may form a flow of air that acts to stabilize the knitted fabric 6. Device 140 includes a plurality of delivering openings 141 connected to air blower 146 by pipe 143, manifold 144 and conveying duct 145. The air blower 146 is in the form of a centrifugal compressor or a reciprocating compressor.

Opening 141 has an air outlet port 142 located close to sidewall 2 of drum 1 and in close contact with blanket 7 (FIG. 8).

The blower 140 performs a function similar to the suction device 40. Opening 141 may inject air that forms a flow that flows substantially tangentially to sidewall 2 of drum 1. A stream of air that spreads evenly across knit 6 removes moisture remaining in the knit and also causes a drop in temperature that acts to stabilize the knit.

According to the present invention, an improved machine and improved method can be obtained as compared to conventional machines and methods for continuously deketizing and stabilizing knitted fabrics. Specifically, the supply of heat, which is an important factor in stabilization, is improved, the performance of removing residual moisture is improved, the squeezing motion is moderately increased, and the knitting is also preferred technical, such as dimensional stability, soft feel and good appearance, It has aesthetic characteristics. Moreover, the machine according to the invention has a simple, compact and economical structure. This reduces configuration, installation, and maintenance costs, and deketizing can be done in a short time with a moderate impact on operating costs.

Claims (10)

In a machine for continuously deketizing and stabilizing knitted fabric 6, a) a cylindrical drum 1 having a first blanket 5 of woven material, a sidewall 2 of which the knit 6 and the second blanket 7 of woven material are wrapped around, b) means for moving and pulling the second blanket 7 in order to compress the knitted fabric 6 against the first blanket 5 and the side wall 2 of the drum 1; 10), c) a first preset first of the drum 1 in close proximity to the outside of the side wall 2 and containing saturated steam at a predetermined pressure and temperature to be in close contact with the drum 1 and to impregnate the knitted fabric 6. A sealed chamber 12 located at the periphery, and d) a device (40; 140) capable of forming a flow of air to stabilize the knit (6) Including, e) the device 40; 140 capable of forming a flow of air is located at a second predetermined periphery of the drum 1 proximate to the outside of the side wall 2, and f) the flow of air formed by the device (40; 140) flows tangentially to the side wall (2) of the drum (1) Machine for continuously deketizing and stabilizing knitted fabrics. 2. Machine as claimed in claim 1, characterized in that the second perimeter is located immediately after the first perimeter with respect to the direction of travel of the knit (6). 2. The device (40) according to claim 1, wherein the device (40; 140) comprises: an air opening (41) having an air outlet (42; 142) spaced outwardly by a predetermined distance from the side wall (2) of the drum (1); A machine for continuously deketizing and stabilizing knitted fabrics, characterized in that it comprises one or more. 4. The continuous knitted fabric according to claim 3, wherein the air outlets (42; 142) are provided on the outside of the second blanket (7) and are in tangential contact with the second blanket (7). Deketizing and stabilizing machine. 4. The deketizing and stabilizing knitted fabric according to claim 3, characterized in that the air outlets 42 and 142 are rectangular and have a predetermined width and length, the length being the same as the length of the drum 1. Letting machine. 2. The apparatus (40) according to claim 1, wherein the apparatus (40; 140) has a plurality of air installed side by side with air outlets (42; 142) provided spaced outward from the side wall (2) of the drum (1) by a predetermined distance. And an opening (41; 141). 7. The continuous knitted fabric according to claim 6, wherein the air outlets (42; 142) are provided on the outside of the second blanket (7) and are in tangential contact with the second blanket (7). Deketizing and stabilizing machine. 7. Machine according to claim 6, characterized in that the air opening (41) is connected to an air inhaler (46) and capable of drawing in air to form the flow. . 7. The machine of claim 6 wherein the air opening 141 is connected to an air blower 146 and capable of injecting air to form the flow. . In the process of continuously deketizing and stabilizing the knitted fabric 6, Iii) wrapping the knitted fabric 6 around the side wall 2 of the cylindrical drum 1, Ii) treating the knitted fabric 6 by saturated steam of a predetermined pressure and temperature at a first peripheral portion of the drum 1 proximate to the outside of the side wall 2, and Iii) treating the knitted fabric 6 by a flow of air to stabilize it. Including, Iii) in step iii), the flow of air is formed at the second periphery of the drum 1 proximate to the outside of the side wall 2, and the flow is tangential to the side wall 2; Flowing Characterized in that, continuously deketizing and stabilizing the knitted fabric.

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