JPH0316417B2 - - Google Patents

Description

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

(Prior Art) One of the most popular compression shrinkage processing methods for knitted fabrics, so-called knitted fabrics, especially circular knitted fabrics.
U.S. Patents 3015145, 3015146, and 3083435 to Eugene Cohn, et al.
There is a method disclosed in No. In the stockinette shrinking method disclosed in that patent, one or more compacting devices are used, each compacting device having a pair of opposed rollers and a feed restraint shoe. In this device, the conveyed fabric passes between the feed roller and the restraint shoe, and is reliably fed at a preset speed. The roller (brake roller) together with the feed roller forms a nip, 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 in the longitudinal direction in a short compressive contraction section formed between the roller nip and the edge of the fabric restraining shoe. Ru. Preferably, the shoe and/or rollers are heated to effectuate the compression shrinking process of the fabric in the compression shrinkage 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. Also, slippage of the feed roller against the fabric surface at the roller nip can result in an undesirable surface appearance on some fabric types. For example, darkly dyed outerwear fabrics may become discolored, or underwear fabrics may become 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 nature of the non-equilibrium effects on both sides of the fabric when using only one compressor of the type described above can be overcome in most cases by providing two compressors, one in opposite directions with respect to the other. It can be resolved. While this can give satisfactory results for some types of fabrics, it still presents difficulties for sensitive fabrics, such as darkly dyed outerwear fabrics. In order to minimize or eliminate the difficulties inherent in existing processing methods, the present invention provides a compression shrinkage processing method for circular knitted fabrics, etc., which maximizes the advantages of differential roller processing technology. The present invention provides such 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 that are driven at high and low surface speeds, respectively. A similar method is adopted. However, the apparatus of the present invention differs from the apparatus disclosed in the above-mentioned 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 ends of a fabric restraint shoe (conveyance shoe) associated with the feed roller and another separate restraint shoe (export shoe) associated with the brake roller are made to face each other, and a gap is provided between these ends to form a restraint section. It 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 (narrowest portion) between the feed roller and the brake roller, and 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 suddenly changes direction by the action of the front end of the carry-out shoe, and is guided into the restraining section formed between both shoes. As soon as the fabric leaves 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 the 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 automatic 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, and one shoe (preferably the carry-in shoe)
can be positioned so as to be able to swing 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 area in which the cloth is hung is of such a degree as to prevent crimping of the cloth compressed in the longitudinal direction.

In one embodiment of the present invention, the apparatus of the present invention is based on a multifunctional machine that has been commercialized to date based on the above-mentioned US patent, and has a structure compatible therewith. Thus, the device of the present invention can be incorporated into conventional devices with simple modifications, using a number of existing mechanisms, and can significantly improve the performance of the device, at least for certain types of fabrics. We are making it possible to upgrade.

(Embodiment) Hereinafter, one preferred embodiment of the present invention will be introduced with reference to the attached drawings, and the above advantages of the present invention,
Make the characteristics even clearer.

First, as explained with reference to FIG. 1, number 1
0 indicates the entire compression shrink compound machine for circular knitted fabrics.
The untreated fabric 11 coming from a source (not shown) is rolled out as it passes over the rotating arcuate rod 12 into a generally flat, two-layered structure.
The fabric then passes under the first tension bar 13 and over the second tension bar 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 and 14 serve to keep the fabric flat, but to apply a slight tension to the fabric so as not to expand it.

In the illustrated multifunction machine, the fabric includes a guide roller 17 (FIG. 7), a driven variable speed control roller 17a,
It passes a floating dancer roll 17b as well as a series of flattening rolls 20. The control roller 17a serves to pass the untreated fabric 11 over the arcuate rod 12 and through the tension bars 13,14. The speed of the roll 17a is adjusted by the dancer roll 17b in relation to the operating speeds of other components of the multifunction machine, which will be described later.

Propeller spreading device 1 below the control roller 17a
8 is provided. 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 ``low hand'' refers to the direction opposite to the direction of movement of the fabric, and the word ``high hand'' refers to the direction of movement of the fabric.

The spreading device includes an internal frame (not shown) that supports the fabric from the inside. The frame is supported horizontally by a grooved edge 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
This is a known and commonly used device, and is provided between the upper series of flattening rolls 20 and the lower pair of steam boxes 21 and 22 of the edge drive roll 19 and the inlet side feed roll of the compression shrinkage device 23, which will be described later. It is being

As is known, the conveyed fabric is transferred downstream of the internal frame of the spreading device (i.e. downstream of the edge drive roll 19).
Slightly overfeed to effectively relax longitudinally and maintain a predetermined defined width. In this state, the stockinette is passed between the steam boxes 21 and 22 to humidify and lubricate it, to promote loosening and adjustment of the stitches, and to prepare for the primary compression shrinkage process.

Immediately after exiting the spreading device 18, the knitted fabric enters a compression shrinkage device 23 where it is compressed longitudinally by an amount determined as a function of the amount of inherent residual shrinkage of the transported fabric, in a process described below. For circular knitted fabrics, the shrinkage amount is generally 15
~25%. The fabric 24 compressed in the longitudinal direction is conveyed to the collection section 25. In the case of the illustrated multifunction device, a winding mechanism is employed. The winding device was developed by Eugene Kohn et al.
Cohn et al., U.S. Pat. No. 3,606,186 or Samuel Cohn, U.S. Pat.
It is of the type disclosed in No. 2736098.
The fabric being conveyed toward the winding device 25 is subjected to the minimum necessary tension to facilitate winding of the fabric by the rolls 26.

Instead of the winding mechanism described above, a folding device as disclosed, for example, in Frezza US Pat. No. 4,053,151 may be employed.

FIG. 7 shows the drive mechanism of the multifunctional device shown in FIG. 1. The aggregating section 25, the compression and contraction device 23, the propeller spreading device 18, and the carry-in rolls 17a are each arranged in a drive configuration whose speeds are controlled individually. The drive arrangement may include variable speed motors in each of the above devices, or a central variable speed drive motor 31 may be combined with an automatic variable drive mechanism to effectively adjust the desired speed. Typically, one device component (e.g. compression deflation device 23) is designated as the "central" device.
It is driven by a motor 31, and the operating speed of other devices is automatically made dependent on the motor 31.
As an example, the driven input roller 17a, the edge drive roller 19 and the winding device 25 are driven by a central drive motor 31 via adjustable variable speed mechanisms 17c, 19a, 25a. 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 arrangement, if the speed of the compression/contraction device 23 increases by 10%, the speeds of the other devices will also increase by 10%. Further, the speed of the winding device 25 changes in accordance with the speed of the compressing and shrinking device 23, and other devices are unrelated. This technique is, needless to say, well known.

Next, details of the novel compression and contraction device of the present invention will be explained with reference to FIGS. 2 to 7. A bearing support 28 is attached to a skeleton frame 27 (FIG. 3). The body 28 carries bearing blocks 29 on both sides of the device. This bearing block 29 rotatably supports the feed roller. In the illustrated configuration, the feed roller 30 is mounted on a fixed axis to 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.
is supported by swing frames 34 attached to both sides of the frame 27. The swing frame 34 swings about the axis of the drive shaft 35. Both swing frames 34 are connected to fluid actuator rod ends 36 which are moored at locations 38 on either side of the device frame. Preferably, the fluid actuator is a one-way actuator, so that the actuating rod 36 can be pushed to the left in FIG. 3 and retracted by control of fluid pressure;
Retraction of the actuating rod 36 allows the brake roller 32 to be drawn toward the feed roller 30.

An automatic variable speed drive mechanism 39 (FIG. 7) driven by central drive motor 31 serves to rotate brake roller 32 at a surface speed that is slower than the surface speed of feed roller 30. A drive mechanism 39 drives a sprocket 40 (FIG. 3), and a chain or belt 41 drives the roller mounting frame 3.
Another sprocket 42 attached to the shaft 35, which is the pivot shaft of No. 4, is driven. Another chain or belt (not shown) connecting shaft 35 to brake roller 32 connects shaft 35 and brake roller 32.
The brake roller is driven when the frame 34 is in the swing position.

In the illustrated preferred embodiment of the invention,
The total diameter of the feed roller 30 is approximately 12.7 cm. The feed roller 32 has a hollow structure, and its wall 43 is a cylindrical steel wall with a thickness of about 3.2 cm. Preferably, the surface of the feed roller 30 is roughened in order to firmly grip the carried-in fabric 11. The feed roller 30 is correlated with a restraining shoe composite body (hereinafter referred to as a shoe) 44 consisting of a shoe body 45 and a restraining section forming blade 46, and the shoe body 45 and the blade 46 constitute one shoe composite. includes a cylindrical smooth inner surface 47 corresponding to the outer surface of the feed roller 30;
48 is formed. This cylindrical inner surface 47,
48 is slightly larger than the diameter of the feed roller (for example, about 12.7 cm in diameter for the feed roller
12.7+0.13 cm), the centers of the cylindrical inner surfaces 47, 48 are offset slightly to the right from the center of the roller as shown in FIG. 2, thereby forming a tapered restraint gap 49. The tapered gap 49 guides and restrains the conveyed fabric 11 through the arcuate surface (approximately 90 degrees) of the feed roller 30 to the discharge end of the shoe composite.

The attachment mechanism of the carry-in side shoe complex 44 was developed by Edmund A. Diggle.
Jr., U.S. Pat. No. 3,973,303. This attachment mechanism includes a pair of upward brackets 50 that are attached to both shaft ends 51 of the feed roller 30 so as to be rotatable within a certain limit. This bracket 50 is connected to a vertically adjustable rod 53 via a universal joint 52. The rod 53 is connected to the handwheel 54 (first
The position is determined by adjusting the position (see Figure) by the operator. 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 on a shaft 56 attached to the upward bracket 50, and the upward bracket 50 is supported by single acting air cylinders 57 on both sides.
It is made to oscillate against. The air cylinder 57
When the rod 58 is retracted due to reduced pressure, the L-shaped bracket 55 swings clockwise in FIG. Furthermore, when the rod 58 of the air cylinder begins to expand due to pressurization, the bracket 55 swings counterclockwise.

Loading side shoe structure 4 of L-shaped bracket 55
4 is attached via a swing bearing 59. The carry-in side shoe complex 59 has tilt adjustment protrusions 6 on both sides.
0 is provided, and this protrusion is connected to the bracket 5.
5 through the window hole 61, and the window hole 61
The position is adjusted by adjusting bolts 62, 63 within.

In explaining the principle of operation of the loading-side shoe mounting bracket complex, it will be assumed that the shoe complex 44 is in the starting position as shown in FIG. By adjusting the bolts 62 and 63 as necessary, the entire shoe structure 44 can be tilted about the axis of the swing bearing 59, thereby adjusting the shape of the tapered restraint gap 49. Further, the whole shoe complex 44 can be rotated about the axis of the feed roller 30 by adjusting the shaft 53 in the vertical direction and swinging the upward bracket 50 about the axis of the feed roller 30. It can be swung in the circumferential direction. This allows fine adjustment of the position of the lower end of the feed shoe composite and fine adjustment of the thickness of the restraining section. By reducing the pressure in the air cylinder 57, the feed shoe structure is rotated between the feed roller 30 and the brake roller 3.
2, the L-shaped bracket 55 swings clockwise about the shaft 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 Eugene Cohn et al.
The restraining section forming blade 46 does not taper into a narrow shape, as is the case with the automatic compression shrink processing apparatus disclosed in the U.S. Pat. When compressing and shrinking a circular knitted fabric up to a width of 1.27 m, the thickness of the lower end of the blade 46 is approximately 3 mm. Bottom surface 6 of the blade-like body forming the restraint section
6 points downward and forms a relatively steep angle from the surface of the feed roller 32, in the illustrated embodiment approximately
It forms a 45 degree angle. This inclined surface 66 forms one side of the constraint section, as will be described in detail below.

As shown in FIGS. 5 and 6, the restraint section forming blade 46 is secured to the main body 4 of the carry-in shoe by inserting a plurality of bolts 67 at regular intervals along the width of the blade.
Fixed at 5. The shoe main body 45 is composed of a plurality of shoe division pieces, and each shoe division piece can be individually adjusted with respect to each attachment beam 68 to perform final precise adjustment of the restraint section forming blade 46.

The carry-out side shoe composite body 69 provided directly below the carry-in side shoe 44 is composed of a shoe main body 70 and a restraining section forming blade-like body 71. Blade-like body 7
1 has a curved front surface 72 and a curved rear surface 73 formed thereon in the same way as the blade-like body 46 described above, and these face the surfaces of the feed roller 30 and the brake roller 32, respectively. At least the curved rear surface 73 has a substantially similar shape corresponding to the surface contour of the brake roller 32 over a certain arc (15-20 degrees), forming a divergent delivery path for the fabric conveyed by the brake roller. are doing. As an example, the radius of surface 73 is approximately 6.35 cm to correlate with brake roller 32, which has an outer surface radius of approximately 6.25 cm, and the center of the radius of surface 73 is placed slightly to the left of the center of brake roller 32 as shown in FIG. The outline of the fabric delivery path is slightly diverged in the direction ahead. This is shown in an exaggerated manner in FIG.

As is clear from FIGS. 2 and 6, the upper end surface shape of the constraint section forming blade member 71 is complementary to the lower end surface shape of the upper blade member 46. The thickness of the blade end portion 74 is approximately the same (about 3 mm as an example), and the inclination angle of the upward restraining section forming surface 75 is the same as that of the surface 6 described above.
Same as 6.

The illustrated compression shrinkage processing device is designed to be able to be incorporated into existing equipment by modifying it.
Brake shoe structure 69 is attached to mounting bracket 77
It is precisely attached to a large angle member 76 that is fixed at both ends. 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 bolts 78a. The main body portion 70 of the brake shoe is welded to a rising piece of angle material, and is provided with a recess 80 for receiving the restraining section forming blade 71. Precise position adjustment of the blade is accomplished by a number of mounting bolts 81 inserted into vertical elongated holes 82 of the blade. A plurality of adjustment bolts 83 pass upward through the shoe body 70 and abut against the bottom surface of the blade-shaped body 71. In the case of a device for fabrics with an upper limit of 1.27 m width, the tightening bolt 81 is approximately 6.6 m, as an example.
Installed at cm intervals. As a result, the lower restraining section forming blade 71 can be aligned with the upper restraining section forming blade 46 with high precision, and the bottom surface 66 of the upper blade forming
The machining section formed by the upper surface 75 of the lower blade member can be precisely formed.

In the device shown, the angle steel composite is
It is swingably attached to the frame 27 by a shaft 84. Its shaft 84 is supported on both sides by mounting blocks 85 in the frame 27.
The mounting block 85 is integral with the bearing support 28. The above mounting method is a convenient method. That is, the shaft 84 and the block 85 are already installed in the equipment of existing commercially available machines, and the shaft 84 and the block 85 are
4 and block 85 can be used to retrofit conventional machines to incorporate the improved apparatus of the present invention.

The position of the swing shaft 84 with respect to the distributed weight of the angle member 76 and the mounting bracket 77 is such that the composite of these two members swings clockwise due to gravity in FIG. The shaped 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 inserting a piece of wood or the like (not shown) into 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. This is done by bringing it into contact with the mounting bracket 77. Preferably, the blade-like body 7
The counterclockwise rocking of No. 1 is not limited as long as contact with the device can be avoided. Therefore, by providing an elongated hole 87 at the outer end of the bracket 77 and inserting the limiting pin 87a 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.

Restriction zone forming blade-like body 4 for adjusting the start of the device
The inclined surface edges 65, 75 of 6, 71 are located approximately at the maximum convergence portion (narrowest portion) of the roller. 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 connected to the feed roller 3
0's outer surface, but not in contact with it. Adjust the vertical rod 53 to remove the upper blade 46.
by adjusting the position with respect to the lower blade 71 and creating a slight gap between the restraining section forming surfaces 66 and 75,
The gap is made to widen slightly. The curved surface 48 of the upper blade 46 is spaced slightly from the surface of the feed roller, and this spacing is ensured by a piece of wood or a spacer ring at the end of the feed roller, or by other adjustment means. do. The upper fluid actuator 57 is filled with air pressure ranging from approximately 0 to about 352 g/cm ² and acts on a piston of about 2580 cm ² . As an example, in the case of a compression processing device for fabrics with a width of 1.27 m or less, if the maximum opening/closing force that can be used by the actuator 57 is 90.7 kg, approximately 200 g of force can be applied per 1 cm.

Next, the operation of the compression shrinkage processing apparatus according to the present invention described above will be explained. The flat, defined width raw fabric 11 enters the restraining passage 49 and is subjected to negligible restraining pressure by the rough surface of the feed roller during passage therethrough. 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, it suddenly changes direction under the action of the blade surface 75 and enters the constraint zone formed between the surfaces 66, 75. The restraint section widens by a certain amount, for example, within 1°.

The fabric passes through the restraining section (length is approximately 4.3 mm in the case of the device shown), contacts the outer surface of the brake roller 32, abruptly changes direction, and connects with the curved surface 73 of the output shoe complex and the brake roller. into the restraining passage 89 formed between the outer surface of the Fabric restraint braking passage 8
9, the surface speed of the braking roller 32 is immediately reached. 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 15 to 20% or less slower than the surface speed of the feed roller 30, depending on the type of fabric. In steady state, the velocity of the fabric is in planes 66, 75
The conveyance speed is switched to the braked conveyance speed at the entrance of the restraint zone formed by Immediately thereafter, the fabric is heated and restrained for a predetermined restraint 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 if 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 constrained section is first adjusted to a value slightly larger than the optimum value using the handwheel 54 and the rod 53 to induce wrinkles, and while observing the condition of the processed cloth, the handwheel 54 and the rod 53 are used to adjust the thickness until the wrinkles disappear. Reduce the thickness of the constraint section with .

In the illustrated device, the brake roller has a layer of elastomer about 6 mm thick on its surface, but it could also be a roughened metal layer. The brake roller 32 is connected to the variable pressure regulator 9
2, the fluid actuator 3
Due to the constant amount of pressure exerted by 7, the net additional force attracted to the restraining surface 73 must be large enough to ensure effective frictional contact with the fabric emerging from the restraining section and to securely grip the fabric. Bye. Experience has shown that this additional force, as well as the required contact pressure between the feed shoe assembly and the feed roller, can be as large as the minimum amount necessary. If necessary, an adjustable limit stop (not shown) can be provided to limit the closing movement of the brake roller towards the restraining surface 73 of the lower blade. Normally, as shown in FIG. 2, the feed roller and the brake roller are spaced apart from each other by an interval that is only slightly larger than the thickness of the restraining section forming blades 46, 71.

Usually, the conveyed fabric is heated and humidified by the steam spray from the steam boxes 20,21. Also preferably, means for heating at least the feed roller 30 and the feed show composite body is provided. As with existing prior devices, the inlet shoe complex is preferably heated by an electric heater connected to the shoe body. feed roller 3
0 is internally heated by steam or heated oil, as an example. Preferably, a thermal intermediary is provided to compensate for the temperature difference between the feed roller 30 and the feed show composite 44.

It goes without saying that the present invention is not limited to the embodiments described above, and that various other applied 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. In this regard, although there are devices in the prior art that compress and shrink circular knitted fabrics using a single device, all of the conventional devices and methods have extremely low shrinkage control performance. The compression shrinkage processing method and apparatus disclosed in the well-known Eugene Cohn et al. patent is notable for its ability to impart high percentage compression shrinkage (i.e., 25% and above). However, even with this device, it is appropriate to use two compression shrink processing devices in order to make the appearance finish on both sides of the fabric the same, but even if this is used, it is appropriate to use two compression shrink processing devices for fabrics that are easily affected. is subject to some restrictions. 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 a very 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. Also, the fabric does not twist or reverse its direction during the compression shrinkage process.
The fabric passes through the input zone with a minimum confining pressure and friction, passes through the restraint zone with both sides maintained in an approximately balanced state, and then abuts against the braking zone and is restrained with a minimum pressure. However, it does not cause slips.

According to the device of the present invention, the fabric slips against the feed roller and the brake roller because of the direct relationship between compression shrinkage and the rotational speed difference between the feed roller and the brake roller. Never. In other words, by setting the difference in rotational speed of the rollers to 25%, it is possible to apply compression shrinkage of 25% to the normal compression shrinkage to the fabric.

Further, according to the method and apparatus of the present invention, the thickness of the fabric subjected to compression shrinkage processing can be approximately the same as the thickness before the processing. For comparison, with conventional equipment, the fabric must be compressed in the thickness direction, so the thickness of the fabric after processing can be 15-25% smaller than before. With the method and apparatus of the invention, the fabric is treated gently throughout, as indicated by its thickness after processing, so that very satisfactory finishes are obtained even in the case of 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 no difference in the finish on both sides of the circular knitted fabric. Because of its close proximity, it can provide a single compression shrink processing device that is ideal for processing circular knitted fabrics. In the device of the present invention, it goes without saying that the fabric must be slid along the restraining surfaces of the feeding shoe and the braking shoe, but the contact pressure can be extremely small, and as a result, even sensitive fabrics can be finely slid. It can be processed and finished to meet the buyer's needs.

A further advantage of the method and apparatus of the present invention is that shrink compression processing can be performed with much less power consumption. Furthermore, the floor area occupied by the apparatus can be reduced because the compression shrinkage process is completed in one step instead of two.

In addition, in the apparatus of the example, the compression contraction processing section forms an angle of 45 degrees with respect to the adjacent roller surface,
The upper and lower limits of this angle are not determined, but from 30 to
It should be between 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.
Furthermore, the method and apparatus of the present invention are suitable for, for example, so-called "wet compression" in which dyeing or other processing is performed using a processing fluid, the moisture content is reduced to 75 to 80%, and compression shrinkage processing is performed. There is. Some conventional devices do not allow wet compaction because high pressure must be applied to the fabric, thereby squeezing out the processing liquid at the compaction section. According to the method and apparatus of the present invention, since the contact pressure required for processing is very low, squeezing out of processing fluid during the compression shrinkage processing step can be minimized or eliminated.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the entire multifunctional machine incorporating the compressing and shrinking processing device for circular knitted fabrics, etc. according to the present invention;
The figure is an enlarged sectional view of the compression shrinkage processing device inside the multifunction machine shown in Fig. 1, showing the feed roller, brake roller, loading side restraining shoe, and unloading side restraining shoe. FIG. 4 is a side view of the compression shrinkage processing apparatus, showing the structure of the compression shrinkage processing apparatus in detail. FIG. FIG. 5 is a front view showing details of the carry-out side restraint shoe and the carry-in side restraint shoe, FIG. 6 is a sectional view taken along arrow 6-6 in FIG. 5, and FIG. FIG. 2 is a schematic diagram of the drive control system of the multifunctional device shown in FIG.

Claims (1)

[Scope of Claims] 1 (a) a fabric feed roller; (b) an outer surface that substantially corresponds to the surface of the feed roller, and the fabric is controlled and conveyed by the feed roller in contact with the surface of the feed roller. a carry-in side fabric restraining shoe forming a restraining carry-in passage; and (c) adjustable relative positioning of the carry-in side restraining shoe and a fabric feed roller to provide a predetermined control to the fabric to be restrained within the carrying-in passage. (d) a fabric brake roller rotatably mounted parallel to and adjacent to the feed roller; (e) axes of the feed roller and the brake roller; (f) having an outer surface corresponding to the surface of the brake roller, and having a surface that is compatible with the surface of the brake roller; (g) adjusting and relative positioning of the output side restraint shoe and a braking roller so that the fabric is restrained in the output passage; adjustable positioning means capable of applying a predetermined control pressure to the rollers; (h) blade-shaped extensions projecting between the feeding and braking rollers are respectively shaped in both the restraining shoes; The two extending portions are arranged to face each other with a plane passing through both axes of both rollers as a boundary, and (i) a compressive contraction constraint section is formed between both opposing surfaces of the double-edged extending portion; An apparatus for compressing and shrinking circular knitted fabric, etc., wherein the constraint section is used as a constraint control passage between the carry-in passage and the carry-out passage. 2. 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 shrink processing equipment. 3. A patent characterized in that one of the two restraining shoes is mounted 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 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 is provided, and the thickness of the restraint section is determined by the wavy wrinkles of the cloth passing through the restraint section. The compression shrinkage processing apparatus according to claim 1, wherein the compression shrinkage processing apparatus is maintained at a thickness that can prevent the shrinkage. 6. The compression shrinkage processing apparatus according to claim 1, further comprising means for heating the feed roller and the carry-in side restraining shoe. 7. 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.
The compression shrinkage processing device described in Section 1. 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 of the two 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 through a constraint section whose length is greater than the thickness of the fabric; and (e) immediately thereafter causing a driven braking roller to rotate at a slower surface speed than the feed roller. (f) at the initial contact position of the fabric, the braking roller surface angle with respect 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) corrugating both sides of the fabric within the constraining zone. A compression shrinkage processing method for circular knitted fabric, etc., using the compression shrinkage processing apparatus according to claim 1, which comprises applying a confining pressure that does not cause wrinkles. 10. A compression shrinkage processing method according to claim 9, characterized in that: (a) applying heat to the fabric during transport; and (b) controllably heating both sides of the fabric. 11 The fabric is approximately parallel to the surface of the feed roller.
10. The compression shrinking method according to claim 9, wherein the material is guided through the constraint section forming an angle of 45 degrees and having a distance of about 4 mm. 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 the following.