JPH01221568A - Method and apparatus for compression shrinkage processing of circular knitted cloth - Google Patents

Abstract

PURPOSE: To provide the subject device capable of performing an effective compressive shrinking process by introducing a tubular knitted fabric into a zone formed with a feeding roller and a retarding shoe and under a prescribed controlled pressure, passing through a blade like surface part and heat-treating the same while being conveyed with a control roller having a slower speed than that of the feeding roller. CONSTITUTION: This method for compressively shrinking a tubular knitted fabric, etc., is provided by introducing the tubular knitted fabric 11 into a retarding zone 49 formed between the surface of a feeding roller 30 and a retarding shoe 44, conveying under a prescribed controlled pressure at a surface speed of the above feeding roller, changing its direction at the lower edge of a curved surface 48 by making a contact with the outer surface of a control roller 32 from the surface part 75 of a blade state body and introducing the same into another retarding zone 89 formed by the curved surface 73 of a discharging side shoe and the outer surface of a control roller 32. The surface speed of the control roller 32 is controlled changeably as slower than that of the above feeding roller 30, and the compressive shrinkage process is performed since a heat treatment is performed during the stay of the fabric in the above retarding zones.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a compression shrinkage processing method for fabric products and an improvement of the apparatus thereof.The present invention specifically relates to the processing of circular knitted fabrics. However, it is not limited to this, and can also be applied to processing knitted and non-knitted coarse cloth products.

(Prior Art) One of the most popular compression shrinkage processing methods for knitted fabrics, so-called knitted fabrics, especially circular knitted fabrics, is described in U.S. Pat. No. 3.015.145 by Eugene Cohn, et al. No. 3,015.146,
No. 3,083°435 discloses a method.

In the stockinette shrinkage method disclosed in the patent,
One or more compaction devices are used, each compaction device having a pair of opposing rollers and a feed restraint shoe. In this device, the conveyed fabric passes between a feed roller and a restraining shoe, and is reliably fed at a preset speed. The roller (brake roller) forms a nip in conjunction with the feed roller, and the fabric coming out of the restraining shoe is pressed into contact between the feed roller and the brake roller at the same time.

A braking roller, driven at a surface speed lower than that of the feed roller, retards the advance of the fabric so that the fabric is compressed longitudinally in a short compression contraction zone formed between the roller nip and the edge of the fabric restraint shoe. Ru. Preferably, the shoes and/or rollers are heated to effectively compress and shrink the fabric in the compression section.

(Problem to be Solved by the Invention) Although the above-mentioned compression shrinkage processing method has become popular and has achieved great success, it is necessary to use multiple rollers with different speeds at the same location on the fabric, but on both sides at the same time. There are some restrictions that stem from the fact that Therefore, the finish on both sides of the fabric will inevitably be slightly different. Additionally, slippage of the feed roller against the fabric surface at the roller nip can result in an undesirable surface appearance for some fabric types. For example, darkly dyed outerwear fabrics may become discolored, or underwear fabrics may appear shiny. This becomes extremely problematic with respect to the processing of circular knit fabrics, where "both" sides of the fabric during processing become external surfaces on both sides in the finished garment.

The property that the use of only one compressor of the type described above produces an unbalanced effect on both sides of the fabric can be overcome by providing two compressors, one in opposite directions with respect to the other.
In most cases it can be resolved. This can give satisfactory results for some types of fabrics, but
Difficulties still remain in the case of sensitive fabrics, such as darkly dyed outerwear fabrics. The present invention provides an automatic compression shrinkage processing method for circular knitted fabrics, etc., which maximizes the advantages of differential roller processing technology in order to minimize or eliminate the difficulties inherent in existing processing methods. and its equipment.

(Means for solving the problems and their effects) In the method and apparatus of the present invention, the fabric is conveyed and braked by opposing feed rollers and braking rollers driven at high surface speed and low surface speed, respectively. method is adopted.

However, the apparatus of the present invention differs from the apparatus disclosed in the aforementioned US patent in that the distance between the feed roller and the brake roller is much larger than the thickness of the fabric to be processed, so that each roller simultaneously covers both sides of the fabric. It is configured so that they do not come into contact with each other. The respective ends of a fabric restraint shoe (III feed shoe) associated with the feed roller and another separate restraint shoe (I general output shoe) associated with the brake roller are opposed, and a gap is provided between these ends. A constraint section is formed.

The fabric is decelerated and longitudinally compressed at the entrance to the constraint section, and guided while being constrained for a predetermined residence time while passing through the constraint section.

Further, both ends of each restraint shoe are located approximately at the maximum convergence portion (i narrow portion) between the feed roller and the brake roller,
The angle with respect to the surface of the feed roller is approximately 45 degrees. As a result, the fabric coming out from the discharge end of the carry-in shoe is 1
The direction is suddenly changed by the action of the front end of the M outlet shoe, and it is guided to the restraint section formed between both shoes. As soon as the fabric exits the restraining zone, a brake roller, which rotates at a surface speed slower than the surface speed of the feed roller, abuts the outer surface of the fabric.

Although the surface speeds of the feed roller and brake roller are different,
Both rollers do not act on the same position on both sides of the fabric at the same time, so there is no risk of the roller surface slipping against both surfaces of the fabric. Therefore, according to the present invention, it is possible to perform the highly efficient self-excited compression shrinkage processing required for many knitted fabrics using a single compression device. Also, the pressure applied in the thickness direction of the fabric when passing through the restraint section is minimized.

As a means for this purpose, a precision suspension adjustment mechanism is provided, so that one shoe (preferably the carry-in shoe) can be positioned so as to be swingable within a certain limit.

This makes it possible to adjust for changes in the thickness of the restraining section during normal operation of the device. The restraint pressure applied to the cloth in the restraint section is determined by the undulation M (cr
isping).

In one embodiment of the present invention, the device of the present invention has a structure compatible with the multifunctional machine that has been commercialized to date based on the above-mentioned US patent. Thus, the device of the present invention can be incorporated into conventional devices with simple modifications, using a number of existing mechanisms, and significantly improves the performance of the device, at least for certain types of fabrics. I'm trying to do that.

(Example) Hereinafter, one preferred embodiment of the present invention will be introduced with reference to the accompanying drawings to further clarify the above-mentioned advantages and characteristics of the present invention.

Referring first to FIG. 1, numeral 10 indicates the entire compression/shrink compound machine for circular knitted fabrics, in which untreated fabrics 11 coming from a source (not shown) are transported by rotating arcuate rods. 12
When passing over it, it spreads out into a flat, two-layered structure. The fabric is then moved to the first tension bar 1
3 and above the second tension lever 14. Both tension bars 13 and 14 are separated by a spacer 15 and are attached to a frame 16 positioned at a predetermined angle. The tension bars 13, 14 serve to apply a slight tension to the fabric, keeping it flat but not causing it to expand.

In the illustrated multifunction device, the fabric is placed on the guide roller 17 (
(Fig. 7), driven variable speed control roller 17a, floating dancer
It passes through roll 17b as well as a series of flattening rolls 20. The control roller L7a moves the untreated fabric 11 into an arcuate rod 12.
It serves to pass through the top and tension bars 13 and 14. The speed of the roller 17a is determined by the speed of the dancer roll 17b in relation to the operating speed of other components of the multifunction machine, which will be described later.
Adjust with .

A propeller spreading device 18 is provided below the control roller 17a. - By way of example, the propeller spreading device is of the type disclosed in Frezza US Pat. No. 4,103,402, incorporated hereinafter. In addition, the word "unmade" refers to the direction opposite to the direction in which the fabric travels.
Furthermore, the word "skilled" refers to the direction in which the fabric travels.

The spreading device includes an internal frame (not shown) that supports the fabric from the inside. The frame is supported horizontally by a grooved line drive roll 19 which is adjustable across the width of the frame and is driven externally by a power mechanism. The spreading device complex is of the known and commonly used type, consisting of an upper series of flattening rolls 20, a pair of lower steam boxes 21, 22 of the line drive roll 19, and an inlet side feed of the compressing and shrinking device 23, described below. installed between the rolls.

As is known, the conveyed fabric is slightly overfeeded downstream of the internal frame of the spreading device (i.e. downstream of the line drive roll 19) to effectively relax it in the longitudinal direction and maintain it at a predetermined defined width. , the stockinette is passed between steam boxes 21, 22 to humidify it, to facilitate a/kL, loosening and adjustment of the stitches, and to prepare it for the subsequent compression shrinkage process.

Immediately after the knitted fabric leaves the spreading device 118, it is compressed and contracted by the compression shrinking device 2.
3, and is longitudinally compressed in a process described below by an amount determined as a function of the amount of inherent residual shrinkage of the transported fabric. For circular knitted fabrics, the amount of shrinkage is generally 15-25%. The fabric 24 compressed in the longitudinal direction is the aggregate part 25? In the case of the multifunction machine shown in the figure 0, which is being transported, a winding mechanism is employed. The winding device is based on the above-mentioned Augen Kohn et al.
U.S. Patent Nos. 3 and 6 of ene Cohn et al.
No. 06,186 or Samuel Cohn (Sa+5ue
Cohn), US Pat. No. 2,736,098. Winding device 25
The fabric being conveyed towards the roller 26 is subjected to the minimum necessary tension to facilitate winding up of the fabric by the rolls 26.

Instead of the above winding mechanism - for example fleck 7.
The folding device disclosed in U.S. Pat. No. 4,053,151 (Frezza) may also be employed.

FIG. 7 shows the drive mechanism of the multifunctional device shown in FIG. 1. Aggregation section 25
, the compression/contraction device 23, the propeller spreading device 18, and the carry-in rolls 17a are each arranged in a drive arrangement whose speeds are individually controlled. The drive arrangement may include variable speed motors for each of the above devices, or a central variable speed drive motor 31 may be combined with an automatic variable speed drive mechanism in order to effectively adjust the desired speed. One device configuration (
For example, the compression/contraction device 23) is a "central" device and is driven by a motor 31, so that the operating speeds of other devices are automatically subordinated to the motor 31. - As an example, the driven input roller 17a, the linear drive roller 19, and the winding device 25 are controlled by variable speed mechanisms 17e, 19a, 2.
It is driven by a central drive motor 31 via 5a. The variable speed mechanism 17C is controlled by the dancer roll 17b and sequentially supplies the fabric to the propeller spreading device 18. According to this organization, if the speed of the compression shrinkage value Wt23 increases by 10%, the speeds of other devices also increase by 10%. In addition, the winding device i
! The change in speed of 25 is the compression contraction device i! 23, and other devices are irrelevant. This technique is, needless to say, well known.

Next, details of the novel compression contraction device of the present invention will be explained with reference to FIGS. 2 to 7.
A bearing support 28 is mounted in FIG. 1, which carries bearing blocks 29 on both sides of the device. This bearing block 29 rotatably supports the feed roll. In the illustrated configuration, the feed roller 3
0 is mounted on a fixed axis on the frame 27 and can be rotated by a central variable speed drive motor 31 (FIG. 7).

A brake roller 32 is associated with the feed roller 30. The brake roller 32 is pivotally supported on both sides by bearing supports 33, which are supported by swing frames 34 mounted on both sides within the frame 27. The swinging frame 34 swings around the axis of the drive shaft 35. The swinging frames 34 on both sides are connected to the rond ends 36 of the fluid actuator moored at positions 38 on both sides of the device frame. It's being done. Preferably, the fluid actuator is a one-way actuator, so that the actuating rod 36 can be pushed to the left in FIG. 32 can be drawn to the feed roller 30.

Automatic variable speed drive mechanism 39 driven by central drive motor 31
(FIG. 7) functions to rotate the brake roller 32 at a surface speed slower than the surface speed of the feed roller 30. A drive mechanism 39 drives a sprocket 40 (FIG. 3), and further, via a chain or belt 41, the roller attachment drives another sprocket 42 that is attached to a shaft 35 that is the swing axis of the frame 34. . Another chain or belt (not shown) connects the shaft 35 to the brake roller 32 and drives the brake roller in the swing position of the frame 34.

In the illustrated preferred embodiment of the invention, the total diameter of feed roller 30 is approximately 12.7 cm. feed roller 3
2 has a hollow structure, and its wall body 43 has a thickness of about 3.2 cm.
It is a cylindrical steel wall of m. Preferably, the input fabric 11
The surface of the feed roller 30 is roughened in order to firmly grip the feed roller 30. The feed roller 30 is a restraining shoe composite (
A cylindrical smooth inner surface 47 , 48 corresponding to the outer surface of the feed roller 30 is formed in the shoe body 45 and blade cover 46 , which are correlated with the shoe 44 (hereinafter referred to as a shoe) and constitute one shoe composite. This cylindrical inner surface 47.48 is slightly larger than the diameter of the feed roller (for example, approximately 12.7+O113 cm for a feed roller diameter of 12.7 cm).
), the center of the cylindrical inner surface 47,48 is offset slightly to the right from the center of the roller as shown in FIG. 2, thereby forming a tapered restraint gap 49. This tapered gap 49
The conveyed fabric 11 is moved along the circular arc surface of the feed roller 30 (approximately 9
0 degrees) to the discharge end of the shoe complex.

The mechanism for installing the loading side shoe complex 44 is made by Edmund.
A. Daigle (Edmund^, Diggle, Jr.
, U.S. Pat. No. 3,973,303. This mounting mechanism includes a pair of upward brackets 50 that are rotatably mounted to both shaft ends 51 of the feed roller 30 within a certain limit.

This bracket 50 is connected to a vertically adjustable rod 53 via a universal joint 52. Rod 53 is positioned by operator adjustment of handwheel 54 (FIG. 1). By slightly adjusting the rod 53 in the vertical direction, the bracket 50 swings slightly clockwise or counterclockwise about the axis of the shaft 51, allowing precise adjustment of the position of the carry-in shoe.

Each L-shaped bracket 55 is pivotally supported at a position 56 of the upward bracket 50, and is swung relative to the upward bracket 50 by single acting air cylinders 57 on both sides. When the rod 58 of the air cylinder 57 retreats due to the reduced pressure, the L-shaped bracket 55 swings clockwise in FIG. 3. Furthermore, when the rod 58 of the air cylinder extends due to pressure, the bracket 55 swings counterclockwise.

The loading side shoe structure 44 of the L-shaped bracket 55 is attached via a swing bearing 59. The carry-in side shoe complex 59 is provided with inclination adjustment protrusions 60 on both sides,
This protrusion protrudes through a window hole 61 of the bracket 55, and its position is adjusted within the window hole 61 by adjusting bolts 62, 63.

In explaining the operating principle of the bracket assembly, it is assumed that the shoe assembly 44 is in the starting position as shown in FIG. 2. Bolt 62. if necessary.
63, the entire shoe structure 44 is tilted about the axis of the swing bearing 59, and the tapered restraint gap 49 is tilted.
The shape of can be adjusted. Moreover, the shoe complex 44
The entire structure is made to swing in the circumferential direction around the axis of the feed roller 30 by adjusting the shaft 53 in the vertical direction and swinging the upward bracket 50 around the axis of the feed roller 30. Can be done. Thereby, the position of the lower end of the shoe composite to be fed can be finely adjusted, and the thickness of the restraining section can be finely adjusted. By depressurizing the air cylinder 57, the feeding shuffling assembly is retracted from the roller nip between the feeding roller 30 and the brake roller 32, causing the L-shaped bracket 55 to swing clockwise about the axis 56. .

This opens the processing area of the compression shrinking device and facilitates the initial introduction of the fabric into the device.

In the compression shrinkage processing apparatus of the present invention, the above-mentioned method of Eugene Cohn et al.
The restraining section forming blade 46 does not taper into a narrow shape as in the case of the automatic compression shrink processing apparatus disclosed in the U.S. Pat. When compressing and shrinking a circular knitted fabric having a width of up to 1.27 m, the thickness of the lower end of the blade-shaped body 46 is approximately 3 mm. The bottom surface 66 of the constraint section forming blade is directed downwardly and at a relatively steep angle from the surface of the feed roller 32, approximately 45 degrees in the illustrated embodiment. This inclined surface 66
is one side of the constraint section, as will be explained in detail below.

The restraining section forming blade 46 has a plurality of bolts 67 spaced apart from each other at regular intervals along the width of the blade as shown in FIGS. 5 and 6.
Insert it and fix it to the main body 45 of the carry-in shoe. The shoe body 45 is comprised of a plurality of shoe segments, and each attachment allows for individual adjustment of each shoe segment relative to the beam 68 for final fine adjustment of the constraint section forming blade 46.

The exit shoe composite body 69 provided directly below the general entry shoe 44 is composed of a shoe main body 70 and a restraining section forming blade-shaped body 71. The blade-like body 71 is formed with a curved front face 72 and a curved rear face 73 in the same way as the blade-like body 46 described above, and each of them has a curved front face 72 and a curved rear face 73, which are connected to the feed roller 30 and the brake roller 3, respectively.
facing the surface of 2. At least the curved rear surface 73 has a substantially analogous shape corresponding to the surface contour of the braking roller 73 over a constant arc (15 to 20 degrees), forming a light spreading delivery path for the fabric conveyed by the braking roller. ing. - As an example, the radius of the surface 73 is approximately 6.35 cm in order to be compatible with the brake roller 32 whose outer surface radius is approximately 6.25 CIm, and the center of the radius of the surface 73 is set as shown in FIG. It is shifted slightly to the left from the center, making the outline of the fabric delivery path diverge slightly toward the front. This is shown in an exaggerated manner in FIG.

It is clear from FIG. 2 and FIG. 6 that the restraining section forming blade-like body 71
The upper end surface shape is complementary to the lower end surface shape of the upper blade-like body 46. The thickness of the blade end 74 is almost the same (-
As an example, the angle of inclination of the upward restraining section forming surface 75 is the same as that of the surface 66 described above.

The compression shrinkage processing device shown in the figure is designed to be able to be incorporated into existing equipment by modifying it. Precisely installed. Side covers 78 are fixed to both sides of the angle member by welding, and each side cover 78 is fixed to the bracket 77 via a pole 78a. The main body portion 70 of the brake shoe is welded to a rising piece of angle material, and has a blade-shaped body 7 forming a restraining section.
A recess 80 for receiving 1 is provided. The blade-like body is
Numerous attachments inserted into the vertical elongated holes 82 of the blade-shaped body can be precisely accomplished by positioning the bolts 81. A plurality of adjustment bolts 83 pass upward through the shoe body 70,
It is in contact with the bottom surface of the blade-shaped body 71. In the case of a device for fabrics with an upper limit width of 1.27 m, bolts 81 are tightened at intervals of about 6.6 cs, for example. As a result, the lower restraining section forming blade 71 can be aligned with the upper restraining section forming blade 46 with high accuracy, and the upper restraining section forming blade 71 can be aligned with the upper restraining section forming blade 46, and is formed by the bottom surface 66 of the upper blade and the upward surface 75 of the lower blade. Processing sections can be precisely formed.

In the illustrated device, the angle steel composite is swingably mounted to the frame 27 by an axle 84. The shaft 84 is supported by the frame 27 via mounting blocks 85 on both sides. The mounting block 85 is integral with the bearing support 2.

The above mounting method is a convenient method. That is, the shaft 84 and block 85 are already installed in the equipment of existing commercially available machines, and the shaft 84 and block 85 can be used to retrofit the conventional machine by incorporating the improved device of the present invention.

The position of the swing shaft 84 relative to the distributed weight of the bracket 77 is determined by the angle member 76 and the mounting, so that the composite of these two members swings in the direction of the hour hand due to gravity in FIG. 6, and also forms a lower restraint section. The blade-like body 71 is set to swing toward the feed roller 30. This rocking motion is performed within a range in which a constant minimum distance is maintained between the curved front surface 72 of the blade-like body 71 and the feed roller 30. This adjustment can be made by placing a piece of wood or the like (not shown) at the end of the feed roller to restrict the closing movement of the blade 71, or by tightening the adjustment bolt 86 as shown in FIG. The mounting is performed by abutting against the bracket 77.

Preferably, the counterclockwise rocking of the blade 71 is not restricted within a range that can avoid contact with the device.

Therefore, by providing an elongated hole 87 at the outer end of the bracket 77 and inserting the limiting pin 81a into the elongated hole 87, the bracket 77 can adjust the elongated hole 87 according to the positioning of the adjustment bolt 86 and/or the control piece. Swing within range. Needless to say, it is also limited by the presence of the brake roller 32.

For the start adjustment of the device, the 1st slope edge 65.75 of the restraining section forming blade-like body 46.71 is located at the maximum convergence part (
It is located in the narrowest genital region). That is, it is located on a plane that substantially includes the axes of both rollers. The tip of the protrusion of the lower blade 71 is very close to, but not in contact with, the outer surface of the feed roller 30. The vertical loft 53 is adjusted to adjust the position of the upper blade 46 relative to the lower blade 71, and the upper blade 46 is restrained. A slight gap is provided between the section forming surfaces 66 and 75, and the gap is shaped to slightly spread light. The curved surface 48 of the upper blade 46 is spaced slightly from the surface of the feed roller, and this spacing is provided by a piece of wood or a spacer ring at the end of the feed roller, or by other adjustment means. The upper fluid actuator 57 has a range from 0 to about 352
Filled with air pressure ranging up to g/cd, approx. 2580a
It acts on the piston of J. - Width l as an example. In the case of a compression processing device for fabrics within 27 m, if the maximum opening/closing force available from the actuator 57 is +r to 90.7, approximately 200 g of force can be applied per 1 c11.

Next, the operation of the compression shrinkage processing apparatus according to the present invention described above will be explained. The unprocessed cloth 11 is flat and has a specified width.
It enters the restraining passage 49 and, while passing through the passage, is subjected to negligible restraining pressure due to the rough surface of the feed roller. A double-layer fabric, in the case of a circular knit fabric, or a single layer fabric, in the case of other fabrics, passes through the passage 49 at the surface speed of the feed roller 30.

When the fabric reaches the lower edge of the curved surface 48, the blade surface 75
With the action of , it abruptly changes direction and enters the constraint zone formed between surfaces 66° and 75 . The restraint section is a little bit,
For example, the light spreads within 1 degree.

The fabric has a length of approximately 4 mm in the case of the restraint section (for the device shown);
3 m), contacts the outer surface of the brake roller 32, suddenly changes direction, and enters the restraint passage 89 formed between the curved surface 73 of the discharge shoe complex and the outer surface of the brake roller. . As soon as the fabric enters the upper end of the constrained brake path 89, it reaches the surface speed of the brake roller 32. The surface speed of the brake roller 32 is controlled by a variable speed mechanism 39 so that it rotates at a surface speed that is slower than the surface speed of the feed roller 30 by 15-20% or less depending on the type of fabric. In steady state, the speed of the fabric switches to the braked conveying speed at the entrance of the restraining section formed by surfaces 66,75. Immediately thereafter, the fabric is heated and constrained for a predetermined constraint zone residence time.

In the compression shrinkage processing method of the present invention, it is desirable to reduce the constraint pressure in the thickness direction in the constraint section as much as possible. However, if there is no confining pressure or the confining pressure is too low, the appearance of the fabric will not be compressed and shrunk smoothly, but will exhibit "wavy wrinkles."

Therefore, the thickness of the restrained section is first adjusted to a value slightly larger than f & normal value using the handwheel 54 and rod 53 to induce wrinkles, and while observing the condition of the processed cloth, the thickness is adjusted by hand until the wrinkles disappear. Reduce the thickness of the constraint section with wheels.

In the illustrated apparatus, the surface of the brake roll is formed with a layer of elastomer approximately 6 mm thick, but it could also be a roughened metal layer.

The braking roller 32 is pulled onto the restraint surface 73 by a constant amount of pressure exerted by the fluid actuator 37 under a pressure controlled by the variable pressure regulator 92 so that the net additional force drawn onto the restraint surface 73 is pulled out of the restraint section. This additional force should be large enough to ensure an effective frictional contact with the fabric and to securely grip the fabric; experience has shown that this additional force is sufficient for the required contact pressure between the feeding shoe complex and the feeding roller. If necessary, an adjustable limit stopper (not shown) may be provided to limit the blocking movement of the brake roller toward the restraining surface 73 of the lower blade. can be 0
Normally, as shown in FIG. 2, the feed roller and the brake roller are separated by a distance that is slightly larger than the thickness of the restraining section forming blade 46.71.

Usually, the conveyed fabric is heated and humidified by the steam blast of the steam box 20.21. Also preferably, means for heating at least the feed roller 30 and the feed shoe composite is provided.

As with existing prior devices, the input shoe composite is preferably heated by an electric heater connected to the shoe body.

The feed roller 30 is heated internally - for example by steam or heated oil. Preferably, a thermal intermediary is provided to compensate for the temperature difference between the feed roller 30 and the feeding shoe composite 44.

It goes without saying that the present invention is not limited to the embodiments described above, and that various other embodiments are possible within the scope of the claims.

(Effects of the Invention) The method and apparatus of the present invention provide remarkable results. In particular, fabrics that have conventionally been compressed and shrunk using two machines can be processed with one machine, and more effectively than before. Although devices for this purpose exist in the prior art for compression shrinking circular knitted fabrics, the prior art devices and methods all have very poor shrinkage control performance. The well-known Eugene Cohn et al.
Although the compression shrinkage processing method and apparatus disclosed in the patents of 1999 and 1999 are notable for their ability to impart high rates of compression shrinkage (i.e., 25% and above), this apparatus still In order to achieve the same appearance finish on both sides of the fabric, it is appropriate to utilize two compression shrink processing machines, but even then some restrictions are imposed on sensitive fabrics. In contrast, according to the method and apparatus of the present invention, a compression shrinkage process of 25% or more can be performed on both sides of the fabric with an extremely good finish using a single compression shrinkage processing apparatus. . This is a significant improvement over conventional methods and devices.

One of the notable features of the invention is that the sloping restraint section separates the feed roller and the brake roller by a small distance that is greater than the thickness of the fabric. This prevents the feed roller and brake roller, which rotate at different surface speeds, from hitting the same position on both sides of the fabric at the same time, and also prevents the fabric from twisting and reversing its direction during compression shrinking.

The fabric passes through the input zone with a minimum restraint pressure and friction, passes through the restraint zone with both sides maintained in an approximately balanced state, and then comes into contact with the braking zone and is restrained with a minimum pressure. However, it does not cause slippage.

According to the device of the invention, the fabric slips with respect to the feed roller and the brake roller due to the direct relationship between compression shrinkage and the rotational speed difference between the feed roller and the brake roller. In other words, by setting the rotational speed difference of the rollers to 25%, the normal 25%
% compression shrinkage processing can be applied.

Further, according to the method and apparatus of the present invention, the thickness of the fabric subjected to the compression shrinkage process can be made approximately the same as the thickness before the process is applied. By the way, in the case of conventional equipment, since the fabric must be compressed in the thickness direction, the thickness of the fabric after processing may be 15 to 25% smaller than before processing. Well, the fabric is
The gentle handling throughout, as indicated by the finished thickness, results in a very satisfactory finish even on sensitive fabrics.

According to the method and apparatus of the present invention, the difference in processing on both sides of the circular knitted fabric, which is processed by overlapping two layers, is very small, that is, there is almost no difference in the finish on both sides of the circular knitted fabric. Therefore, it is possible to provide a single compression shrinkage processing device that is optimal for processing circular knitted fabrics.In the device of the present invention, the fabric must be slid along each constraining surface of the feeding shoe and the braking shoe. Needless to say, the contact pressure can be kept very low, and as a result even sensitive fabrics can be finely processed and finished to suit the customer's needs.

A further advantage of the method and apparatus of the present invention is that the shrink compression process can be performed with much less power consumption IRm. In addition, the floor area of the equipment is 2 times the compression shrinkage process.
Since it is done in 1 process instead of 1 process, it can be reduced.

In addition, in the apparatus of the embodiment, the compression shrinkage processing section is adjacent to tJo-
The upper and lower limits of this angle are not determined, but are set between 30 and 60 degrees.

It goes without saying that the method and apparatus of the present invention can be applied to fabrics other than circular knitted fabrics, as well as coarsely knitted fabrics such as compressible gauze.

In addition, the method and apparatus of the present invention can be used, for example, in a so-called "wet compression" process, in which dyeing or other processing is performed using a processing fluid, the water content is reduced to 75 to 80%, and compression shrinkage processing is performed.
Also suitable for Some conventional devices cannot perform If1 wet compression because they require high pressure to be applied to the fabric and the processing fluid is squeezed out in the compression contraction section. For example, since the contact pressure required for processing is very small, squeezing out of processing fluid during the compression shrinkage process can be minimized or eliminated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entire multifunction machine incorporating the compression shrinkage processing device for circular knitted fabrics, etc. according to the present invention, and FIG. 2 is an enlarged sectional view of the compression shrinkage processing device in the multifunction machine shown in FIG. 1. , the third TI! showing the feed roller, the brake roller, the inlet side restraint shoe, and the output side restraint shoe! J is a side view of the compression shrink processing device in the multifunction machine shown in FIG. 1, showing the structure of the compression shrink processing device in detail. FIG. The installation of the side restraint shoe is shown in a partially cutaway perspective view showing the details of the means, Figure 5 is a front view showing the details of the carry-out side restraint shoe and the carry-in side restraint shoe, and Figure 6 is the arrow 6-6 in Figure 5. The cross-sectional view of FIG. 7 is a schematic diagram of the drive control system of the multifunctional machine of FIG. 1.

Claims (1)

[Claims] 1. (a) a fabric feed roller; (b) an outer surface substantially corresponding to a surface of the feed roller;
(c) a carry-in side fabric restraint shoe that forms a restraint carry-in passage through which the fabric is controlled and conveyed by the feed roller in conjunction with the surface of the feed roller; (c) the carry-in side restraint shoe and the fabric feed roller are adjustable relative to each other; (d) adjustable positioning means capable of positioning the fabric to apply a predetermined control pressure to the fabric to be restrained within the feed path; and (d) rotatably mounted parallel to and adjacent to the feed roller. (e) an area where the feed roller and the brake roller are closest to each other is set in a plane passing through the axes of the feed roller and the brake roller; and (f) a surface of the brake roller. (g) a discharge-side restraining shoe having an outer surface corresponding to the brake roller and forming a discharge passage through which the fabric is controlled and discharged by the brake roller; (g) the discharge-side restraint shoe and the brake roller; (h) adjusting the feeding and braking force on both restraining shoes; A blade-shaped extension is formed between both rollers, and
(1) A compressive contraction constraint section is formed between the opposing surfaces of the double-edged extending portion. An apparatus for compressing and shrinking circular knitted fabric, etc., comprising: using this constraint section as a constraint control passage between the carry-in passage and the carry-out passage. 2. Claim 1, characterized in that the compressive contraction restraint section formed between the two restraint shoes is provided at an angle of approximately 45 degrees with respect to the surface of the feed roller. compression shrinkage processing equipment. 3. One of the restraining shoes is attached so as to be able to swing within a certain range about the axis of the related roller, so that the thickness of the restraining section can be increased or decreased. A compression shrinkage processing apparatus according to claim 2. 4. The compression and contraction processing apparatus according to claim 1, wherein both of the adjustable positioning means are comprised of a fluid actuating means and a pressure regulating means for the fluid actuating means. 5. An adjustable positioning device capable of moving each of the blade-shaped extensions relatively toward or away from each other, and the thickness of the restraint section is determined by adjusting the thickness of the restraint section by the wave-like wrinkles of the cloth passing through the restraint section. 2. The compression/shrinkage processing apparatus according to claim 1, wherein the thickness is maintained at a level that prevents the above. 6. The compression shrinkage processing apparatus according to claim 1, further comprising means for heating the feed roller and the restraining shoe on the carry-in side. 7. The compression shrink processing apparatus according to claim 1, wherein the feed roller is made of metal and has a roughened outer surface so as to be able to reliably grip the fabric. . 8. The compression shrink processing apparatus according to claim 7, wherein the brake roller has an elastic outer surface. 9. (a) conveying the fabric in a flat and humidified state; and (b) bringing one side of both sides of the fabric into contact with the surface of the driven feed roller, and applying a predetermined pressure to the other side of the fabric. (c) abruptly stopping the restraint of the fabric and changing the traveling direction of the fabric at an acute angle from the roller surface; (d) constraining the fabric by passing it through a constraint section whose length is greater than the thickness of the fabric; and (e) immediately thereafter, the surface of a driven braking roller rotating at a surface speed lower than that of the feed roller. (f) at the initial contact position of the fabric, the surface angle of the braking roller relative to the fabric constrained within the constraint section is set to be large; (g) constraining the fabric against the surface of the braking roller under a predetermined control pressure; and (h) forming corrugated wrinkles on both sides of the fabric within the constraint zone. A method for compressing and shrinking a circular knitted fabric, etc., using the compression and shrinkage processing apparatus according to claim 1, which comprises applying a confining pressure that does not cause . 10. The compression shrinkage processing method according to claim 9, characterized in that: (a) applying heat to the fabric during conveyance; and (b) controllably heating both sides of the fabric. 11. The fabric is guided through the restraining section at an angle of approximately 45 degrees to the surface of the feed roller and at a distance of about 4 mm.
Compression shrinkage processing method described in section. 12. (a) the fabric is made of a circular knitted fabric, and (b) the circular knitted fabric is widened in the lateral direction to a predetermined specified width, and is transported after being humidified with steam while maintaining the specified width. The compression shrinkage processing method according to claim 11, characterized by: