WO2014125330A1

WO2014125330A1 - A mechanism which prepares fatigue test sample from single cord and rubber, can be recalibrated and perform automatic wrapping

Info

Publication number: WO2014125330A1
Application number: PCT/IB2013/051197
Authority: WO
Inventors: Buket SAHIN; Alper KIRMIZIOGLU
Original assignee: Kordsa Global Endustriyel Iplik Ve Kord Bezi Sanayi Ve Ticaret Anonim Sirketi
Priority date: 2013-02-14
Filing date: 2013-02-14
Publication date: 2014-08-21
Also published as: LU92787B1; LU92349I2

Abstract

The present invention relates to a mechanism (1) wherein the cords (K) are wrapped parallel to each other and homogenously, and which prepares sample for fatigue test by coating the cords (K) with rubber, can be recalibrated and can perform automatic wrapping. The apparatus (19) which can perform double sided wrapping has two different apparatus (19) size by means of its re-configurable feature. While the single cord (K) fed from the roller (3) or the windlass (4) is wrapped on the apparatus (19) rotated by a motor (18), the desired moving step is given to the single cord (K) by the linear controller (14).

Description

A MECHANISM WHICH PREPARES FATIGUE TEST SAMPLE FROM SINGLE CORD AND RUBBER, CAN BE RECALIBRATED AND

PERFORM AUTOMATIC WRAPPING Field of Invention

The present invention relates to a mechanism wherein the cords are wrapped parallel to each other and homogenously, and which prepares sample for fatigue test by coating the cords with rubber, can be recalibrated and can perform automatic wrapping.

Background of the Invention

Tires go out of service with the fatigue of the cords and detaching of the rubber and the cords from each other. The cords are continuously subjected to tensile- compressive forces upon the tire contacting the ground during usage. The most important factor in weakening of the cords is the compressive forces. The reason for reducing the rupture strength of the cords is wearing of the cord filaments rubbing to each other. In order to create a medium similar to dynamic tire behavior in the laboratory environment, after the test sample is tired with circular movements, fusing and fatigue tests are performed. The purpose is to observe the change in dynamic features even if the physical features of the test sample remain the same by performing fusing and fatigue tests on the same sample after the cords are tired.

The fatigue test is one of the methods which is performed in order to check the level of the cords dipped into a chemical compound sticking to the rubber and resistance conservation under a certain load and tired for a certain time. A composite structure is obtained by placing rubber having same sizes on the lower and upper surfaces of the single cords wrapped in certain size parallel to each other in certain intervals. One more of the same composite structure is prepared. Square textured rubber paste in same sizes is placed to both sides of these two samples on top of each other. The composite structure is placed into a mold and cooked in press under certain pressure and at a certain temperature. After the sample removed out of the press is cooled, some part of the samples prepared by being cut in the sizes of fatigue apparatus sample is subjected to a fatigue test at a certain temperature and spin. Stretching test is performed with the samples which are subjected or not subjected to the fatigue test after press and the single cord and rubber fusing values are compared.

In the fatigue test, rubber pastes having the thickness of 0.5mm and rayon, nylon, polyester, aramid, hybrid and other cords bent with different features and bathed with different chemicals are used to create a composite structure. The size of the test sample is according to the fatigue apparatus sample used, and prepared in two different sizes being 20 cm x 12.5 cm and 35.5 cm x 23cm. In order to prepare test sample, 4 rubber pastes are cut from the rubber paste coated with polyethylene in sizes of 20 cm x 12.5 cm or 35.5 cm x 23 cm. The single cords are wrapped manually with the present apparatus. The current apparatus are in a rectangular shape manufactured from steel in sizes of 20 cm x 12.5 cm and 35.5 cm x 23 cm. There are dents present on both short ends of the apparatus with the purpose of deter mining the wrapping frequency. The dent numbers used change according to the diameters of the single cord. There are two different dent numbers for apparatus having the both sizes. A dent number is such that 90 parallel single cords will come to 100cm, and the other one is such that 65 parallel single cords will come to 100cm. There four different apparatus in the state of the art. These are one apparatus in the sizes of 20 cm x 12.5 cm such that 90 parallel single cords will come to 100cm, an apparatus in the sizes of 20 cm x 12.5 such that 65 parallel single cords will come to 100cm, an apparatus in the sizes of 35.5 cm x 23 cm such that 90 parallel single cords will come to 100cm, and an apparatus in the sizes of 35.5 cm x 23 cm such that 65 parallel single cords will come to 100cm.

The sticking features of the fatigue test sample prepared manually change depending on humidity, light and dirt. Change of the sticking features is an unwanted situation. Test sample preparing process is long and open to failures. In the state of the art, cords with different thicknesses are wrapped only in two different frequencies. That is, there are only two frequencies such that 65 or 90 parallel single cords will come to 100 cm. The diameters of the cords change between 0.2mm and 1.2mm. In the state of the art, the operator winds with an apparatus which enables wrapping such that 65 frequency will come to 100cm when the diameter of the cord fitting between the dents of the apparatus enabling the wrapping such that 90 frequency will come to 100cm becomes difficult. Fusing in cord-paste composite structure is enabled with cord-rubber fusing and rubber-rubber fusing. The frequency of the cords affects the percentage of the fusing surfaces of cord-rubber and rubber-rubber, therefore it affects the fusing amount of the cords. Currently making wrapping only in 2 frequencies changes the percentages of the cord-rubber and rubber-rubber sticking surfaces of the cords having diameters that vary between 0.2mm and l.mm. This change is unwanted and non-standard situation.

Composite structure in ASTM D4393-04 standard is prepared on a rotating cylinder. This standard discloses preparing sample having the sizes of 230mmx230mm from the fabric and sample in bands having the width of 25mm from the single cord. The standard does not include information about the density of the single cord wrapped on the rotating cylinder. The idea of rotating cylinder disclosed in the standard is used in the sample preparation apparatus of the Wallace Firestone fatigue press. The said apparatus comprises a cylinder rotated by an engine and a bobbin. In the said apparatus samples having the width of 75mm are prepared. The cylinder moving on the endless screw moves one step on the endless screw upon every rotation of the engine. Each step determines the density of the cords. Being only one density type according to the screw pitch of the endless screw is a disadvantage when the percentage of the cord-rubber and rubber-rubber sticking surfaces and the varying cord diameters are considered. Besides, there is a homogeneity problem with the said apparatus. After the cords are wrapped on the rotating cylinder, they are coated with the rubber. The homogeneity and the parallelism of the cords are corrupted while the said structure is removed from the cylinder by being cut. When the cords wrapped on the round cylinder surface are flattened by being cut, they are in different lengths because of the strechings. The cords wrapped not being homogenous and parallel affects the test results negatively. Wrapping on the rotating cylinder has disadvantage because of parallelism and homogeneity problem and because it performs wrapping in single density.

United States Patent document no US7445175, an application known in the state of the art, discloses an apparatus for wrapping around a reel. In this apparatus driven with the engine, the density of the cords is not given with moving forward. When the cords overlap, they move aside. Also in this apparatus, since the wrapping surface is round cylinder, the above mentioned parallelism and homogeneity problem is a disadvantage. Besides, the density cannot be adjusted according to the cord diameter.

Objective of the Invention

The objective of the present invention is to realize a mechanism which prepares fatigue test sample from single cords in different diameters in different standard densities, can be recalibrated and perform automatic wrapping.

A further objective of the present invention is to realize a mechanism which prepares fatigue test sample in desired homogeneity and parallelism, can be recalibrated and perform automatic wrapping.

Another objective of the present invention is to realize a mechanism which prepares sample for fatigue test in shorter time than the present system by wrapping untouched by human hands, can be recalibrated and perform automatic wrapping.

Description of the Invention "A mechanism which prepares fatigue test sample from single cord and rubber, can be recalibrated and perform automatic wrapping" realized to fulfill the objective of the present invention is illustrated in the accompanying figures wherein

Figure 1 is the schematic view of a mechanism which prepares fatigue test sample from single cord and rubber, can be recalibrated and perform automatic wrapping. Figure 2 is the perspective view of the holding pieces and the sliding pieces which are mounted.

Figure 3 is the perspective view of the latch to both end of which rubber is adhered and which is used to prepare sample.

Figure 4 is the perspective view of the linear controller.

Figure 5 is the view of the feeding unit (roller and the windlass) and the equipment positioned on the structure.

Figure 6 is the view of the engine and the apparatus positioned on the structure.

Figure 7 is the schematic view of the digital sensor, pulleys and the linear controller.

The components given in the figures are numbered and the numbers refer to the following:

1. Sample preparation mechanism for the fatigue test

2. Feeding member

3 Roller

4, Windlass

5 Shaft

6 Mechanical brake

7 Spring

8 Sliding bolt

9 Recess

10. Equipment

11. Digital sensor 12. Holder

13. Moving pulley

14. Linear controller

15. Cord holder

16. Support member

17. Control panel

191. Main switch

192. Digital sensor display

193. Engine speed regulating switch

194. Emergency light

195. Emergency button

196. "The apparatus is on" light

197. Start button

198. Restart button

199. Pause button

200. "The apparatus is on stand-by" button

18. Motor

19. Apparatus

191. Connection members

192. Holding member

193. Sliding members

194. Hole

195. Large latch

196. Small latch

197. Groove

20. Magnetic sensor

21. Computer

A. Leg

P. Platform

I. Structure

K. Cord C. Bolt

D. Bolt hole

The inventive sample preparation mechanism for fatigue test (1) has working principle comprising the steps of

at least one feeding unit (2) on which the cord (K) is located, which can rotate freely and wherein the roller (3), windlass (4) or both (3,4) are used together,

at least one shaft (5) which creates the axis wherein the feeding unit (2) which is the roller (3) or the windlass (4) is rotates and which is connected to the structure (I) from eat least its one end,

at least one mechanic brake (6) which is comprised of at least one spring (7) connected to a rubber band on the shaft (5), at least one sliding bolt (8) connected to the said spring (7), and a recess (9) in which the sliding bolt (8) moves, and which enables the shaft (5) to be stopped upon the warning given by the user by tightening the shaft (5) upon the bolt (8) connected to the spring (7) moves inside the recess (9),

at least one equipment (10) which gives pre stress to the cord (K) coming out of the feeding member (2),

- at least one digital sensor (11) which reads the stress of the cord (K) coming out of the equipment (10),

at least one holder (12) which enables the cord (K) to be directed after coming out of the equipment (10) and is positioned on the digital sensor (11) measuring the stress of the cord (K),

- at least one linear controller (13) which is driven to move horizontally in a desired way with the computer program and regulates the wrapping densities of the cords parallel to each other,

at least one cord holder (15) which is fixed on the linear controller (13) and on which the moving pulleys (14) are positioned with the support members, at least two moving pulleys (14) which are located on the holder (12) and on the cord holder (15) and enable the cord (K) coming to be directed, at least one support member (16) which is located on the cord holder (15) and enables the moving pulleys (14) to be kept in certain position, at least one control panel (17) which enables the user to control manually and has main switch (171), digital sensor display (172), motor speed regulating switch (174), emergency button (175), start button (177), restart button (178), pause button (179) and emergency light (173), "the apparatus is on" light (176), "the apparatus is in stand by light (180) thereon, at least one apparatus (19) which rotates in a vertical axis to the cord (K) coming axis by being driven by at least one motor (18) and enables the wrapping of the cord (K) coming from the cord holder (15),

at least one magnetic sensor (20) which is positioned on the apparatus (19) and is used to detect every half rotation of the apparatus (19),

at least one computer (21) wherein the data collected from the sensors (11, 20) and which enables the linear controller (14) to be operated automatically according to the desired features.

The apparatus (19) performing the wrapping process of the cord comprises

- at least two connecting members (191) which are connected to the legs

(A) extending vertical to the platform (P) on the structure (I) and which can rotate in parallel axis to the platform (P) with the effect of the motor (18) by being connected to the motor (18) from one surface,

at least two holding members (192) both ends of which are open, which are hollow and preferably in the shape of a rectangular prism, and which are attached to the connecting members (191),

at least one sliding member (193) at least one side of which passes through the holding member (192) and which is in the shape of a rectangular prism attached vertically from its corners, at least one hole (194) which enables the cords (K) to be fixed to the sliding member (193) upon the cords (K) are knot after being passed through it,

at least one latch (195, 196) in the shape of a rectangular prism which is positioned to the opening inside the sliding member (193) and has extensions in the width enabling it to remain fixed in the said opening, at least one groove (197) which is in the shape of a channel, located at least one side of the sliding member (193) far from the holding member (192) and in which the rubber enabling the cord (K) to be attached during wrapping is placed.

Selecting the desired sample size,

Placing the suitable latch (195, 196) inside the apparatus (19) according to the determined sample size,

Cutting 4 rubber paste from a rubber paste coated with polyethylene according to the large or small sizes,

Turning the main switch (171) on on the control panel (17) and regulating the motor speed (18) with the motor speed regulation switch (173), Selecting the suitable program for the wrapping type from the computer (21) and executing,

The single cord (K) coming from the feeding member (2) being passed respectively from the mechanic brake (6), porcelain holder (12) in the inlet of the digital sensor (11), digital sensor (11), porcelain holder (12) in the outlet of the digital sensor (11), pulleys (13) which are positioned vertically and can rotate freely, at least one pulley (13) which is positioned vertically and can rotate freely, and at least two pulleys (13) which are positioned horizontally and can rotate freely with the aim of eliminating the irregularities in the horizontal axis, Knotting the single cord (K) to the holes (194) located on the sliding members (193),

Placing two rubber pastes to the grooves (197) present on the sliding members (193) on the upper and lower surfaces of the latches (195, 196) according to the wrapping size by passing the rubber ends,

Pressing the "start the wrapping operation" button (177) on the control panel (17),

The cord holder (15) on the linear controller (14) being its place on the alignment point according to the sizes,

Pressing the "start the wrapping operation" button (177) on the control panel (17) twice in order that the motor (18) driving the apparatus (19) operates and the wrapping operation starts,

Placing two rubber pastes to both sides of the single cord (K) wrapped according to the wrapping size when the wrapping is over on the surface in homogeneous and desired density,

Taking two samples on the apparatus (19) upon the single cords (K) are cut from the opening at the edges of the apparatus (19),

The inventive sample preparation mechanism for fatigue test (1) comes to the apparatus (19) by passing through single cord (K) fed from a feeding member (2) such as roller (3) than can rotate freely or windlass (4), an equipment (10) which gives pre stress to the cord (K), a digital senor (11) which reads the stress of the cords (K), two moving pulleys (14), and a cord holder (15) which is fixed on the linear controller (13). When the apparatus (19) driven by a motor (18) rotates, it activates the single cord (K) which is wrapped on the roller (3) connected to the roller shaft (5) bedded with the bearings that can rotate freely or the windlass (4) connected to the windlass shaft (5) by pulling the single cord (K). The cord holder (15) which has three moving pulleys (14) thereon is fixed on the linear controller (13). The desired horizontal movement is given to the linear controller (13) with the computer (21) programming. The density of the wrappings of the single cords (K) parallel to each other is enabled by the linear controller (13) over which the single cords (K) pass. The homogeneity of the single cords (K) is provided by adjustable mechanic brakes (6) connected to the roller (3) haft (5) and the windlass (4) shaft (5), an equipment (10) giving pre stress to the cord (K) coming out of the roller (3) or the windlass (4), two moving pulleys (13) after the cord (K) goes out of the sensor (11) and three moving pulleys (14) on the cord holder (15).

The present cords (K) are wrapped on the rollers (3) or present on the windlass (4) in the hank. The single cords (K) wrapped to rollers (3) before are placed on the shaft (5) on which the roller (3) is located. And the single cords (K) in the hank are placed on the windlass (4). The single cords (K) being taken horizontally from the roller (3) on the roller (3) shaft (5) positioned horizontally or from the windlass (4) on the windlass (4) shaft (5) positioned horizontally prevents the cords (K) wearing of by rubbing each other. In the present invention, the rubber is adhered to the both surfaces of the apparatus before starting the automatic wrapping. In the present invention, the program determined according to the diameter and the density in a desired percentage for the cord (K) diameters varying between 0.2mm and 1.2mm is selected and the automatic wrapping is started through the computer (21). In the present invention, the horizontal moving steps in the holder (12) over which the cord (K) passes are controlled with the computer (21) via the signals generated with the rotation of the apparatus (19). In the present invention apart from the computer (21) program interface, there is also a control panel (17) present wherein the wrapping process is controlled manually.

Although the inventive mechanism (1) is operated with the computer (21) program, the wrapping process starts upon the operator pushes "start the wrapping process" button (177) in order that the mechanism (1) operates more safely. With this command the cord holder (15) on the linear controller (13) takes its place on the linear controller (13) once at the alignment point. Since the mechanism (1) performs wrapping process in two different widths being 12.5cm and 23cm, the alignment is realized. When the operator pushes the "start wrapping process" button (177) second time, the motor (18) driving the apparatus (19) operates and the wrapping process starts. During operation "the apparatus is on" light (176) turns on and off in every half cycle of the apparatus (19). In the present invention, the "apparatus is on stand-by" light (180) turning on and off is enabled with the signal detected by the magnetic sensor (198) in every half cycle of the apparatus (19). If the operation is wanted to be paused for any reason manually, "wrapping process pause" button (179) is pushed. Upon pushing the said button (179), the wrapping process stops and "the apparatus is on stand-by" light (180) turns on. If the wrapping process which is stopped by pushing the "wrapping process pause" button (179) is wanted to be continued from where it was, "wrapping process restart" button (178) is pushed. When the "wrapping process restart" button (178) is pushed, the motor (18) starts to operate and continues wrapping from where it was. "The apparatus is on stand-by" light (180) turns off and the "apparatus is on" light (176) turns on in every half circle of the apparatus (19). The stress reading digital sensor (11) which the mechanism (1) has gives signal if the string is torn or the cord stresses exceed the intervals determined manually. If the cord (K) stresses read by the stress reading sensor (11) exceed the predetermined interval or the operator pushes the emergency button (175) on the control panel (17) during wrapping, the wrapping process stops and the emergency light (173) turns on. In this case the wrapping starts from the beginning after the switch (171) is closed and the safety conditions are provided. If there is no emergency case during the operation, the homogenous wrapping having desired density is provided. The rubber prepared before is adhered to both end surfaces of the wrapped cord (K). Two samples are prepared at the same time by cutting the cords (K) from the openings at the edges of the apparatus (19).

DETAILED DESCRIPTION OF A PREFERRED MECHANISM

Figure 1 shows an automatic apparatus (19) which wraps the single cord (K) in desired density homogenously and in a parallel way. The apparatus (19) is generally comprised of a computer (21), feeding member (2), shaft (5), control panel (17), linear controller (13) apparatus (19), the structure (I) on which the apparatus (19) is mounted, a motor (18) which drives the apparatus (19), and a fixing platform (P). In figure 1, single cord (K) coming from the roller (3) or the windlass (4) follows the path of porcelain holder (12) in the inlet of the digital sensor (11), digital sensor (11), porcelain holder (12) in the outlet of the digital sensor (11), pulleys (14) which are positioned vertically and can rotate freely, a pulley (14) which is positioned vertically and can rotate freely, and two pulleys (14) which have height difference between them, are positioned horizontally and can rotate freely respectively by passing from the mechanic brake system (6) which eliminates the cord (K) irregularities in the horizontal axis. Finally the single cord (K) is tied to the holes (194) in the figure 7 by knotting according to wrapping size.

The single cords (K) being fed from the roller (3) or the windlass (4) at the same speed continuously determines the homogeneity of the wrapping. Proper feeding of the cords (K) is enabled at the outcome from the roller (3) or the windlass (4) with the mechanic brake (6) which stops the roller (3) shaft (5) brakes mechanically and the mechanic brake (6) which stops the windlass (4) shaft (5) mechanically. In the figure 6, there is a mechanic brake (6) comprised of spring (7) in order to brake the roller (3) shaft (5) and the windlass (4) shaft (5) used to calibrate the stress level of the single cord (K) coming from the roller (3) on the roller (3) shaft (5). The mechanic brake (6) which brakes the roller (3) shaft (5) mechanically is comprised upon the spring (7) connected to a band attached to the rubber on the roller (3) shaft (5) is connected to the part fixed on the structure (I) with a sliding bolt (8). Mechanic braking is realized upon the stress of the spring (7) changes with the bolt (8) connected to the spring (7) being slid mechanically on the recess (9) and the roller (3) shaft (5) being braked in this way. And the windlass (4) shaft (5) mechanical braking is realized similar to the roller (3) shaft (5) braking. The irregularities of the single cord (K) fed from the roller (3) on the roller (3) shaft (5) or the hank on the windlass (4) in horizontal axis is eliminated with the mechanic brake (6). The mechanic brake (6) realizes braking by changing the stress of the cord (K) with the spring (7) located therein. The digital sensor (11) reads the stress of the single cord (K) fed properly, and sends signal to the control panel (17) in stress conditions exceeding a certain interval. In order that the digital sensor (11) in figure 8 can read properly, one porcelain holder (12) for each inlet and outlet of the digital sensor (11) is placed. Homogenous wrapping is enabled by means of the grooves made at the centers of the pulleys (13) in order to eliminate the cord (K) irregularity originating from the diameter width of the two pulleys (13) that can rotate freely and are located on the table in Figure 7, and the porcelain holder (12) on the outlet of the digital sensor (11).

There are main switch (171), digital sensor display (172), motor speed regulating switch (173), emergency light (174), emergency button (175), the apparatus is on light (176), start wrapping process button (177), pause wrapping process button (179), restart wrapping process button (178) and the apparatus is on stand-by button (180) present on the control panel (17). The configurable apparatus (19) which can wrap in two different sizes is comprised of two sliding members (193) in Figure 2, two holding members (192) in the shape of hollow rectangular prism in which the sliding members (194) enter. The apparatus (19) in Figure 7 is connected to the legs (A) on the structure (I) via two connecting members (191). The connecting member (191) in Figure 7 is bolted to the holding members (192) in Figure 2 via the bolt holes (D) thereon. Similarly, the connecting member (191) in Figure 7 is bolted to the holding members (192) in Figure 2 via the bolt holes (D) thereon. The motor (18) in Figure 7 drives the apparatus (19) with single piece. The apparatus (19) rotates by means of the bearings rotating freely.

As shown in Figure 2, there are openings in the shape of channels wherein the sliding members (193) are held by the holding members (192). When the apparatus (1) is used to prepare sample in 35.5cmX23cm sizes, the bolt holes (D) at the ends of the holding members (192) and the bolt holes (D) at the end of the sliding members (193) are aligned and bolted. Besides this, similarly the bolt holes (D) at the ends of the holding members (192) and the bolt holes (D) at the end of the sliding members (193) are aligned and bolted. The bolt holes (D) at the ends of the latch (195, 196) used to prepare sample in 35.5cmX23cm sizes in Figure 3 and the bolt holes (D) at the other ends of the sliding members (193) are aligned and bolted. Rubber is placed on both sides of the latch (195, 196) in Figure 3 before starting wrapping. The ends of the rubber placed on the upper surface of the latch (195, 196) in Figure 3 enters into the grooves (197) present on the upper part of the sliding members (193) in Figure 2. The ends of the rubber placed on the lower surface of the latch (195, 196) in Figure 3 enters into the grooves (197) present on the lower part of the sliding members (193) in Figure 2.

When the apparatus (19) is used to prepare sample in 20cmX12.5cm sizes, two sliding members (193) in Figure 2 enters into the square shaped holes (194) provided from one end to the other inside the holding members (192). The bolt holes (D) at the ends of the holding members (192) in Figure 2 and the bolt holes (D) at the other ends of the sliding members (193) are aligned and bolted. Besides this, similarly the bolt holes (D) at the ends of the holding members (192) and the bolt holes (D) at the other ends of the sliding members (193) are aligned and bolted. The bolt holes (D) at the ends of the latch (195, 196) used to prepare sample in 20cmX12.5cm sizes in Figure 4 and the bolt holes (D) at the other ends of the sliding members (193) in Figure 2 are aligned and bolted. Rubber is placed on both upper sides of the latch (195, 196) in Figure 4 before starting wrapping. The ends of the rubber placed on the upper surface of the latch (195, 196) in Figure 4 enters into the grooves (197) present on the upper part of the sliding members (193) in Figure 2. The ends of the rubber placed on the lower surface of the latch (195, 196) in Figure 4 enters into the grooves (197) present on the lower part of the sliding members (193) in Figure 2.

Moving cord holder (15) located on the linear controller (14) in Figure 5 is comprised of a pulley (13) which is placed vertically and can rotate freely, and two pulleys (13) which have height difference between them, are placed horizontally and can rotate freely. The pulley (13) which is placed vertically and can rotate freely is fixed on the cord holder (15) present on the linear controller

(14) with the support members (16) being attached via the bolts (C). The pulley (13) which is placed vertically and can rotate freely is fixed on the cord holder

(15) present on the linear controller (14) with the support members (16) being attached via the bolts (C). The single cord (K) coming from the pulley (13) which is placed vertically and can rotate in Figure 3 passes from the middle of the pulley (13) which is placed vertically and can rotate freely, and its movement direction is changed. The single cord (K) is passed first from the pulley (13) located vertically that can rotate freely and then the pulley (13) located horizontally on a little higher place, and the last stress is given before wrapping with the height difference between the pulleys (13).

The windlass (4) on which the hank shaped single cords (K) in Figure 6 placed is constituted by welding the ends of a wheel comprised by attaching the arms by welding to each other, and the ends of another wheel comprised by attaching the arms by welding to each other with six pieces. One arm of the windlass (4) is folded; it enables the circular shaped hank to fit over the windlass (4) with a foldable system. There is a mechanic brake (6) comprised of spring (7) in order to brake the roller (3) shaft (5) used to calibrate the stress level of the single cord (K) coming from the roller (3) on the roller (3) shaft (5). The desired braking is performed mechanically on the roller (3) shaft (5) by moving the sliding bolt (8) to left or right.

One of the most important features of the present invention is to enable pre- automatic wrapping of single cords (K) the diameters of which change between 0.2mm and 1.2mm homogenously and parallel to each other with single apparatus (19) which can perform re-programmable 128 different kinds of wrappings depending on the desired density and desired wrapping area 128 different wrappings are limited to the capacity of the linear controller (14) which can program. When the capacity of the linear controller (14) is increased, types of different wrappings will also increase. Depending on the ratio of the space between two adjacent single cords (K) wrapped parallel to each other to the distance between the centers of two adjacent cords, density in desired percentage is provided. The other important feature of the present invention (1) is to prepare fatigue test sample in sizes of 20cmX12.5cm and 35.5cmX23cm with single apparatus (19) which can be reconfigurable via the latch (195, 196) in two different sizes being 20cmX12.5cm and 35.5cm. The said apparatus (19) is in the shape of hollow rectangular prism. There are sliding members (193) on the upper parts of the apparatus (19) which can slide inside the body, the apparatus (19) is in the size of 35.5cmX23cm when the said members (193) are in open position. When the sliding members (193) on the upper part of the apparatus (19) engage, the apparatus (19) is in the size of 20cmX23cm, the wrapping is performed in 20X12.5cm of this area. The present invention (1) prepares two samples at the same time since the wrapping is carried out in both surfaces of the apparatus (19) in the shape of rectangular prism. In case wherein the single cord (K) diameter is d and the distance between the centers of two adjacent cords (K) is x; and if the ratio of the "x-d" which is the space between two adjacent single cords (K) to the x (the distance between the centers of two adjacent single cords (K)) is y ; the present invention (1) prepares sample in sizes of 20 cm x 12.5 cm or 35.5 cm x 23 cm in density of y% from the single cord (K) having the diameter of d.

Another important aspect of the present invention, it prepares two small or large samples in desired small or large sizes at the same time with the reconfigurable single apparatus (19) to be used for the single cords (K) in all different diameters and types. Two small samples are prepared at the same time using the small latches (196) of the apparatus. Two large samples are prepared at the same time using the large latches (195) of the apparatus. By means of the said mechanism (1) two samples are prepared at the same time and time is saved. Within the scope of these basic concepts, it is possible to develop various embodiments of the inventive "Mechanism which prepares fatigue test sample from single cord and rubber, can be recalibrated and perform automatic wrapping (1)". The invention can not be limited to the examples described herein; it is essentially according to the claims.

Claims

1. A sample preparation mechanism for fatigue test (1) characterized by at least one feeding unit (2) on which the cord (K) is located, which can rotate freely and wherein the roller (3), windlass (4) or both (3,4) are used together,

- at least one mechanic brake (6) which is comprised of at least one spring

(7) connected to a rubber band on the shaft (5), at least one sliding bolt (8) connected to the said spring (7), and a recess (9) in which the sliding bolt

(8) moves, and which enables the shaft (5) to be stopped upon the warning given by the user by tightening the shaft (5) upon the bolt (8) connected to the spring (7) moves inside the recess (9),

at least one digital sensor (11) which reads the stress of the cord (10) coming out of the equipment (10),

- at least one holder (12) which enables the cord (K) to be directed after coming out of the equipment (10) and is positioned on the digital sensor (11) measuring the stress of the cord (K),

at least one linear controller (13) which is driven to move horizontally in a desired way with the computer program and regulates the wrapping densities of the cords parallel to each other,

at least one cord holder (15) which is fixed on the linear controller (13) and on which the moving pulleys (14) are positioned with the support members,

at least two moving pulleys (14) which are located on the holder (12) and on the cord holder (15) and enable the cord (K) coming to be directed, at least one support member (16) which is located on the cord holder (15) and enables the moving pulleys (14) to be kept in certain position, at least one control panel (17) which enables the user to control manually and has main switch (171), digital sensor display (172), motor speed regulating switch (174), emergency button (175), start button (177), restart button (178), pause button (179) and emergency light (173), "the apparatus is on" light (176), "the apparatus is in stand by light (180) thereon, at least one apparatus (19) which rotates in a vertical axis to the cord (K) coming axis by being driven by at least one motor (18) and enables the wrapping of the cord (K) coming from the cord holder (15),

at least one computer (21) wherein the data collected from the sensors (11,

20) and which enables the linear controller (14) to be operated automatically according to the desired features.

A sample preparation mechanism for fatigue test (1) according to claim 1, performing the wrapping process of the cord and characterized by at least two connecting members (191) which are connected to the legs (A) extending vertical to the platform (P) on the structure (I) and which can rotate in parallel axis to the platform (P) with the effect of the motor (18) by being connected to the motor (18) from one surface,

at least one sliding member (193) at least one side of which passes through the holding member (192) and which is in the shape of a rectangular prism attached vertically from its corners,

at least one hole (194)which enables the cords (K) to be fixed to the sliding member (193) upon the cords (K) are knot after being passed through it, at least one latch (195, 196) in the shape of a rectangular prism which is positioned to the opening inside the sliding member (193) and has extensions in the width enabling it to remain fixed in the said opening, at least one groove (197) which is in the shape of a channel, located at least one side of the sliding member (193) far from the holding member

(192) and in which the rubber enabling the cord (K) to be attached during wrapping is placed.

3. A sample preparation mechanism for fatigue test (1) according to claim 1, characterized by a computer (21) which has different programs to prepare samples in desired properties (percentage, density, etc.), and enables the horizontal movement to be given automatically to the linear controller (14) over which the single cords (K) pass. 4. A sample preparation mechanism for fatigue test (1) according to any one of the preceding claims, characterized by an automatic linear controller (14) which operates upon the commands given via the computer (21) and/or the control panel (17) in order to enable wrapping the single cords (K) bent in different ways, made of different materials and bathed with different chemicals, in various diameters and parallel to each other in a desired density based on the ratio between the space between two adjacent single cords (K) (x-d) and the distance between the centers of two adjacent cords (x). 5. A sample preparation mechanism for fatigue test (1), according to claim 2, characterized by an automatic apparatus (19) which is driven by the motor, which has at least two latches (195, 196) wherein the samples in different sizes are created, and which can wrap at the same time. 6. A sample preparation mechanism for fatigue test (1), according to anyone of the preceding claims, characterized by control panel (17) which has at least one main switch (171) enabling its turning on/off, "start wrapping operation" button (177) starting the wrapping operation, "the apparatus is on" light (176) turning on and off with every half rotation of the apparatus (19) upon pushing the said "start wrapping operation" button (177), "pause wrapping operation" button (179) used to pause operation manually for any reason during operation, "the apparatus is on stand-by" light (180) turning on upon pushing the said "pause wrapping operation" button (179), restart button(178) used to resume the wrapping process stopped by pushing the said the said "pause wrapping operation" button (179), digital sensor display (172) showing the stress values which are read from the digital sensor (11) reading the stress of the single cord (K), and enabling the maximum and minimum cord (K) stress intervals to be calibrated, emergency button (175) pushed for any unexpected security threatening factor, emergency light (174) turning on in case the stress values of the digital sensor display (172) exceed the stress intervals or the emergency button (175) being pushed, and motor speed regulation switch (173) used to regulate the motor (18) speed thereon.

A sample preparation mechanism for fatigue test (1) according to any one of the preceding claims characterized by working principle comprising the steps of - Selecting the desired sample size,

The single cord (K) coming from the feeding member being passed respectively from the mechanic brake (6), porcelain holder (12) in the inlet of the digital sensor (11), digital sensor (11), porcelain holder (12) in the outlet of the digital sensor (11), pulleys (13) which are positioned vertically and can rotate freely, at least one pulley (13) which is positioned vertically and can rotate freely, and at least two pulleys (13) which are positioned horizontally and can rotate freely with the aim of eliminating the irregularities in the horizontal axis,

Knotting the single cord (K) to the holes (194) located on the sliding members (193),

Taking two samples from the said apparatus (19) by cutting the single cords (K) from the open part at the end sides of the apparatus (19).