Re-weaving machine and re-woven tire cord fabric

Abstract

The invention relates to a re-weaving machine (1) and re-woven tire cord fabric which enables to weave the defected tire cord fabrics (B) to be woven again without being damaged after finishing process, re-woven tire cord fabric. The objective of the present invention is to provide a reweaving machine (1) which allows weaving the tire cord fabrics (B) again without getting damaged even in tire cord fabrics (B) with high linear densities and high weft densities, and which has blades (10) that can be adjusted according to the different cord fabric features.

Claims

1. A reweaving machine for the tire cord fabrics comprising: at least one let-off reweaving stand; at least one pull roll which has at least two vertically placed bobbins and applies pulling force on a fabric; at least one cutting unit which has at least one holding bar having a plurality of adjustment slots installed thereon for each blade; at least one weaving loom which reweaves fabric; at least one wind-up stand which packs the rewoven the fabric and is characterized by: at least two pneumatic brakes which are placed on both sides of the let-off reweaving stand, at least one barometer located on the two pneumatic brakes, at least one pressure control valve which adjusts the air pressure of the two pneumatic brakes, at least one tension control unit which adjusts the said pressure control valve, at least two separator bars which pass through the cutting unit and are placed vertical to the movement direction of the fabric that becomes strips after passing through the cutting unit, and at least two rotator blades (14) which are placed parallel to each other.

2. The reweaving machine of claim 1, wherein the plurality of adjustment slots installed on the holding bar enable the reweaving machine to reweave the fabric with a linear density that is higher than 300 decitex (dtex) and lower than 15000 dtex.

3. rhe reweaving machine of claim 1, wherein the plurality of adjustment slots installed on the holding bar enable the reweaving machine to reweave the fabric with a weft density that is higher than 3 Pick Per Decimeter (PPD) and lower than 20 PPD.

4. The reweaving machine of claim 1, wherein the at least two separator bars enable the removal of the plurality of weft yarns remaining on the fabric by means of the vibration which is applied and vertical separation.

5. The reweaving machine of claim 1, wherein the at least two rotator blades which have the adjustable widths in order to maintain the quality during reweaving of different types of fabrics having different width, weft material, linear density, and cord density.

6. The reweaving machine of claim 1, wherein a pleating system which allows high reweaving speeds up to 700 meters per minute by holding a plurality of warps together and preventing the plurality of weft yarns in 90 degrees of angle being open.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) FIG. 1 is a schematic view of the inventive reweaving machine.

DETAILED DESCRIPTION OF THE INVENTION

(2) “A reweaving machine” developed to fulfill the objectives of the present invention is illustrated in the accompanying figures, in which

(3) The components shown in the figures are each given reference numbers as follows:

(4) 17. Reweaving machine

(5) 18. Let-off stand

(6) 19. Pull roll

(7) 20. Bobbin

(8) 21. Pneumatic brake

(9) 22. Barometer

(10) 23. Pressure control valve

(11) 24. Control unit

(12) 25. Cutting unit

(13) 26. Blade

(14) 27. Holding bar

(15) 28. Adjustment slot

(16) 29. Separator bar

(17) 30. Rotator blade

(18) 31. Weaving loom

(19) 32. Wind-up stand

(20) A. Air source

(21) B. Tire cord fabric

(22) The inventive reweaving machine (1) which is developed to eliminate the defects of the tire cord fabrics that are defectively woven by reweaving comprises

(23) at least one let-off stand (2) in which the fabric (B) regarded as defective is placed by the operator in order to be rewoven,

(24) at least one pull roll (3) which applies pulling force on the fabric (B) in order to enable the fabric (B) placed on the let off stand (2) to move, and which has at least two bobbins (4) that are vertically placed in order to maintain the uniform distribution of the tension along the width of the fabric (B),

(25) at least two pneumatic brakes (5) which enable the fabric (B) placed on the let off stand (2) to kept at a certain tension without getting damaged, which are placed on both sides of the let off stand (2) and operated with air pressure,

(26) at least one control unit (8) which enables to keep the fabric (B) in a desired tension value by adjusting the pressure control valve (7) which adjusts the air pressure of the pneumatic brakes (5) according to the data it receives from the barometers (6) placed on the brake,

(27) at least one cutting unit (9) which has at least one holding bar (11) having adjustment slots (12) thereon for each blade (10) in order to enable the system to operate properly without any quality problem in high linear density and high weft densities,

(28) at least two separator bars (13) which pass through the cutting unit (9) and which are placed vertical to the movement direction of the fabric in order to separate each strip of the fabric (B) that is become as strips from neighbor strips,

(29) at least two rotator blades (14) which are placed parallel to each other in order to remove the weft yarn adhered to the warp cord after passing through the separator bars (13), which enable the single warp cords to pass in opposite layers and directions by passing each warp one cord below and one cord above,

(30) at least one weaving loom (15) to which the warp cords are transferred after cutting blades (14) in order to rewoven properly,

(31) at least one wind-up stand (16) to which the rewoven fabrics are sent in order to be packed.

(32) In the preferred embodiment of the invention, by means of the adjustment slots (12) which the holding bar (11) has, the fabrics (B) with linear density higher than 500 dtex and lower than 900 dtex can be rewoven. The technique can also be used for fabrics (B) with linear densities higher than 300 dtex and lower than 15000 dtex.

(33) In the preferred embodiment of the invention, by means of the adjustment slots (12) which the holding bar (11) has, the fabrics (B) with weft density higher than 4 PPD and lower than 15 PPD can be rewoven. The invention can also be used for fabrics (B) with weft densities higher than 3 PPD and lower than 20 PPD.

(34) Cotton, polyrayon, fiber glass and texturized nylon filling yarns with high elongation are used as weft material in preferred embodiment of the invention.

(35) In the preferred embodiment of the invention, polyamide 6.6, polyamide 6, polyester, rayon, aramide, basalt, carbon fiber, fiber glass, polyethylene filaments or hybrid cord combinations of these materials are used as warp material.

(36) In the preferred embodiment of the invention, the warp cords can be monofilament yarn or multifilament yarns or combinations thereof in hybrid cord form.

(37) In the preferred embodiment of the invention, the cord density can be 50-200 cords per decimeter. More preferably, this invention operates with 60-150 warp cords per decimeter.

(38) In the preferred embodiment of the invention, weft and cord yarns may have 50 to 800 twists per meter (tpm).

(39) In the preferred embodiment of the invention, the weft and warp cords have Z or S direction twists in cable twisting and Z or S direction twists in layer twisting.

(40) In the preferred embodiment of the invention, reweaving can be performed at speed up to 500 meters per minute by using pleating system. Furthermore, it can also be used in higher reweaving speeds such as 700 meters. The warps are held together by using pleating system and the ends of the weft yarns placed in 90 degrees of angle are prevented from being open. Therefore the wefts wind the warps at the edges of the fabric. The pleating system used in the inventive weaving machine (1) enables to work faster than a standard weaving machine.

(41) The inventive reweaving machine (1) starts with the let off stand wherein the fabric (B) to be rewoven is placed. During process, two sets of pneumatic brakes (5) are applied on both sides of the let off stand (2) in order to control and improve the fabric (B) tension. Pneumatic brakes (5) are provided with air pressure, and controlled in accordance with the data received via the barometer (6) and by adjusting the pressure control valve (7) which adjusts the air pressure. Since the tension between the pull roll (3) and the let off stand (2) is kept fixed, the cutting unit (9) is placed before the pull roll (3) and thus the weft is enabled to be cut easily. In order to enable the system to operate properly without experiencing any quality problems in high linear density and high weft densities, the cutters in the inventive reweaving machine has a holding bar (11) having adjustable slots for each cutting blade (10). During cutting, the fabric (B) is cut in strips with the width of approximately 5 cm.

(42) The pull roll (3) has two bobbing (4) which are vertically placed in order to maintain the uniform distribution of tension along the width of the fabric (B). Pneumatic brakes (5) and the vertically placed pull roll bobbins (4) prevent the cutting blades (10) which cause broken and damaged cords from contacting the warp.

(43) In the inventive reweaving machine (1), after the fabric (B) is passed through the pull roll (3), the fabric strips formed during cutting stage move towards the separator bar (13). The separator bar (13) is comprised of two bars placed vertically which enable each strip is vertically separated from the neighbor strip. In this stage, the direction of separation and the process is vertical. By means of the vibration that is applied and the vertical separation, the separator bar (13) enables to eliminate the weft yarn in the fabric (B). The separator bar (13) makes easy to collect the wefts cut during process. Then the fabric (B) goes to the rotator blades (14).

(44) There are two rotator blades (14) which are placed parallel to each other, in order to eliminate the weft yarn which is adhered to the warp cord after passing from the separator bars (13). In this process, each warp in the fabric (B) is separated from its neighbour such that it will pass one cord below and one cord above along the rotator blade (14). This causes the single warp cord to pass from the rotator blade (14) in opposite layer and direction.

(45) The rotator blades (14) have the adjustable widths in order to maintain the quality during reweaving of different types of fabrics having different width, weft material, linear density and cord density. The speed of the fabric (B) and the speed of the rotator blades (14) in the system can be adjusted and controlled separately from each other through the control unit (8).

(46) After rotator blades (14), each warp enters to the weaving loom (15) for being rewoven properly. Problems such as the spreading of the cords, opening of the cords or the cord being released from the fabric (B) can be prevented from the start with this reweaving process. Since air pleating systems are used with the abovementioned equipment and systems in the weaving looms (15)I the new technique allows the reweaving speed to increase up to 500 meters per minute. Finally, the rewoven fabrics go to the wind up stand (16) in order to be packed.

(47) The inventive reweaving machine (1) allows the products, which cannot be rewoven or which have quality problems after being rewoven, to be rewoven. By means of the inventive reweaving machine (1), the tire cord fabrics the specifications of which are given below can be rewoven without experiencing the problems occurring in the previous art:

(48) The linear density is 500 to 9000 dtex.

(49) Weft materials are cotton, rayon, polyrayon and fiber glass which have weft with high elongation.

(50) The weft density is 4 to 15 PPD (pick per decimeter).

(51) The designing purpose of the invention is that is “easy to use” as the machine is easy to calibrate. When the style is changed, the corresponding parameters (fabric width, weft materials, greige or finished fabric etc) also change.

(52) By means of the invention, it has working capacity in fabrics with high linear density (such as 9000 dtex) and high weft density (15 PPD). It will be possible to reweave finished fabrics (B) which is hard to reweave compared to greige fabrics.

(53) Contrary to the previous art, the present invention has two rotator blades (14) which enable to completely eliminate the weft yarns during reweaving. Therefore, when it is compared with the previous art, the new technique has two different stages having three different equipments for eliminating the wefts from the fabric (B).