JP4340471B2 - Dipping code manufacturing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a dipping cord and an apparatus for manufacturing the same, and in particular, a dipping cord suitable for manufacturing a rubber product reinforced with a cord such as a tire is produced by a simple means that saves space, and with high quality. The present invention relates to a production method and a production apparatus that can be produced.
[0002]
[Prior art]
Conventionally, the production of dipping cords used for tires, etc. has been produced by weaving twisted organic fiber cords and dipping them in a large-scale, mass production system using large-scale equipment (specialty). No. 60-71239, JP-A 63-203841). However, the loom is not productive, and the weft of the weave is not only unnecessary for reinforcing the rubber, but also deteriorates the quality of the rubber product. In addition, the textile dipping processing equipment is built in a space like a large gymnasium, and high towers are built and dried and baked. Does not fit. In addition, the quality of the adhesive-treated codes deteriorates over time, but the dipping codes produced in large quantities and concentrated are usually topped as the next process after being temporarily held. There was also a problem in terms of quality.
[0003]
On the other hand, as represented by the Toyota system in automobiles, a technology capable of providing a necessary amount of a high-quality product when needed is also required for rubber products. In addition, the types of cords and rubber to be reinforced are often changed depending on applications and types, and combinations and the like have been diversified. In such a case, conventional mass production and intensive production are rather irrational and poor in productivity. In order to solve such a problem, a method of running in hot air in an independent form without using braided cords in an apparatus similar to a conventional dipping apparatus has been attempted in part. However, such one-by-one system also simply circulates the cord with the adhesive attached in hot air, so it is still inefficient in drying, requires a large space, and in terms of thermal energy Was also a waste.
[0004]
[Patent Document 1]
JP-A-60-71239 (page 1-2, FIG. 1).
[Patent Document 2]
JP-A-63-203841 (page 1-3, FIG. 1).
[0005]
[Problems to be solved by the invention]
The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a small and simple dipping means. Another object is to provide a high-quality dipping code with stable adhesion. Yet another object is to provide the necessary amount of dipping code required for various types of rubber products, such as various types of cords and rubbers, in a simple manner, when needed. It is in.
[0006]
[Means for Solving the Problems]
The present invention has been made in order to achieve the above object, and is characterized as a manufacturing method as follows. The present invention includes a step of attaching an adhesive latex to a cord made of organic fiber, and a step of circulating the surface of the reed roller rotating in hot air by the code to which the adhesive latex is adhered, The present invention relates to a method for producing a dipping cord in which latex is dried and / or baked by passing hot air between the cords in the process of circulating the cords. Further, according to the present invention, the axial direction of the saddle roller and the axial direction of the cylindrical roller disposed so as to be paired with the saddle roller are arranged so as to be inclined from a parallel by a predetermined angle. The present invention relates to a method of manufacturing a dipping code in which one cord circulates a plurality of times on a saddle roller by circulating the code between a roller and its cylindrical roller. The present invention is also a saddle roller that forms a cylinder by arranging a plurality of small-diameter roller groups in the circumferential direction, and each small-diameter roller of the plurality of small-diameter roller groups. The present invention relates to a dipping cord manufacturing method in which one cord circulates a plurality of times on the saddle roller by being arranged so as to be inclined with respect to the axial direction of an adjacent small-diameter roller by a predetermined angle. The present invention also relates to a dipping cord manufacturing method in which, in the heel roller, the cord is stretched or contracted by changing the diameter of the heel roller in a process in which the cord circulates on the heel roller. Furthermore, the present invention relates to a method for manufacturing a dipping cord by untwisting a twisted cord and impregnating the adhesive into the cord in the previous stage of the adhesive attaching step.
[0007]
In addition, the present invention has been made to achieve the above object, and features as a manufacturing apparatus are as follows. The present invention is composed of a latex adhesion mechanism configured to adhere an adhesive latex to a cord made of organic fibers, and a chamber including a heel roller that circulates the surface of the cord, and the heel roller. The present invention relates to a dipping cord manufacturing apparatus that also includes a hot air circulation mechanism configured so that hot air penetrates between the cords in the process of circulating the code. In the present invention, the saddle roller and the cylindrical roller that is paired with the saddle roller are arranged so that each axial direction is inclined from the parallel by a predetermined angle, so that the single roller is placed on the saddle roller. The present invention relates to a dipping code manufacturing apparatus in which a code can be circulated a plurality of times. In the present invention, the saddle roller is a saddle roller in which a plurality of small-diameter roller groups are arranged in a circumferential direction to form a cylinder, and the axial direction of each small-diameter roller of the plurality of small-diameter roller groups is The present invention relates to a dipping cord manufacturing apparatus that is arranged so as to be inclined with respect to the axial direction of an adjacent small-diameter roller by a predetermined angle from the parallel, so that one cord can circulate a plurality of times on the heel roller. The present invention also relates to a dipping cord manufacturing apparatus in which the diameter of the reed roller is changing. Furthermore, this invention relates to the manufacturing apparatus of the dipping cord provided with the twist back tool in the front | former stage of a latex adhesion mechanism.
[0008]
The present invention relates to a dipping process for cords made of organic fibers. The cords in the present invention are yarns or monofilaments composed of fibers. Examples of the yarns include multifilament yarns made of long fibers and spun yarns made of short fibers. For tire cords, appropriate twists are applied. It is desirable that As the material of the cord, an organic fiber such as nylon, polyester, polyvinyl alcohol, aramid fiber, wholly aromatic polyester fiber, or PBO (paraphenylene benzobisoxazole) fiber is used. The cords in the present invention are based on independent individual cords, but those having a weft knitting, warp knitting, or non-woven fabric in which wefts are sandwiched between warp yarns with some weft connection ( (Hereinafter expressed as weave weave) can also be used as the cord of the present invention.
[0009]
The present invention relates to an adhesive treatment for a cord, that is, dipping, which is performed in order to reinforce the rubber with a cord and improve the adhesion between the rubber and the cord. The adhesive treatment on the cord is performed by first attaching an adhesive latex to the cord. The latex is attached to the cord by immersing the cord in a latex storage tank (glue bath) or by attaching latex picked up from the glue bath with a roller or the like to the cord. Alternatively, the running cord can be showered with latex. Excess latex is removed from these latexes by squeezing with a nip roller or a nozzle as necessary, and the latex is sent to the next drying step.
[0010]
As an adhesive to the organic fiber cord, resorcin formalin latex and rubber latex such as vinylpyridine latex and SBR latex are often mixed and used. Dipping is typically performed by attaching these adhesive latex to the cord, drying the moisture, and then baking resorcin formalin to improve the adhesion to rubber. In addition, in the case of hardly adhesive fibers such as polyester fibers, pretreatment may be performed with an epoxy emulsion or the like. Latex refers to a polymer in which a polymer such as rubber or plastic is dispersed in an aqueous solution using an emulsifier or the like, and the adhesive latex in the present invention improves adhesion to rubber, including those exemplified above. This is an adhesive using water as a medium. In dipping with these adhesives, a drying process for drying moisture and, if necessary, a baking process for reacting a thermosetting resin such as resorcin formalin are performed. Moreover, although it is not directly related to this dipping, since it is a process in which the cord passes through hot air, it can also be used as a heat treatment for the cord. In tire cord dipping, the tire cord is generally stretched between a drying step and a baking step. Therefore, in the present invention, the term “dipping” or “dipping process” represents not only a process of adhering to a cord but also a case involving heat treatment and stretching of the cord.
[0011]
The dipping means of the present invention is characterized by being performed by a saddle type roller that rotates in hot air. The scissors roller is a roller provided with a large number of gaps on the surface of the roller so that gas can freely pass through. The location where the adhesive or the like comes into contact with the roller can be made as small as possible. Since the cord runs on the scissors roller, a long path necessary for drying and the like can be stored compactly, and since it is a rotary motion, the stability of the apparatus is also good. Moreover, drying time and baking time can be significantly shortened by drying and baking the code | cord | chord which circulates on a reed roller with the hot air which penetrates a reed roller. That is, if the cord group simply travels in the hot air, the hot air moves along with the cord and is inefficient, but the hot air used for drying etc. is not good because the hot air penetrates between the individual cords. The experimental results confirmed that the cords were instantly separated from the cord, and fresh hot air always hit the cord, and the drying time could be shortened by almost an order of magnitude.
[0012]
An object of the present invention is to increase the efficiency of drying and baking by allowing hot air to pass between the cords of the cord group that circulates around the saddle roller, and to make the baking apparatus compact. Here, the penetration means that the hot air passes between the cords and passes from the inside to the outside of the reed roller or from the outside to the inside. In order to achieve this penetration and increase the thermal efficiency, it is desirable to have a hot air circulation mechanism. The hot air may be penetrated from the inside to the outside of the scissors roller, or may be penetrated from the outside to the inside, but the rate at which the scissors roller is soiled with the adhesive is smaller from the inside to the outside. As an example from the inside to the outside, a system in which a fan is provided inside the reed roller, the hot air is blown into the chamber through the cord from the reed roller can be taken. The hot air blown out can be used by circulating the hot air from the hot air chamber to the fan suction port inside the reed roller. Alternatively, a fan can be placed outside the chamber and hot air can be blown into the roller. The chamber is a room for holding hot air, is effective for preventing the hot air from being diffused and circulating the hot air, and the present invention can make the chamber compact, so that the heat efficiency is good. Moreover, the circulation use of such hot air is significant not only in terms of thermal efficiency but also in terms of quality in that hot air at a constant temperature can always hit the cord.
[0013]
As a means for a cord to circulate on the reed roller of the present invention, there are a method in which one cord passes only once on a reed roller and a method in which a cord passes on a reed roller a plurality of times. The method of passing only once is good in productivity in the sense that the number of codes can be increased because a large number of codes can be run in parallel. In the method of circulating a plurality of times, since the surface area of the reed roller is limited, the number of cords is limited, but the residence time can be increased and the speed can be increased, but the number of cords produced is small. Note that the method in which the code circulates a plurality of times does not apply to the weave weave.
[0014]
There is a Nelson method as one of the methods in which the code circulates on the roller several times. In the Nelson method, by tilting the roller shaft between two cylindrical rollers by a predetermined angle from parallel, when the cord moves out of one rotating body and moves to the next rotating body, the cord is moved to the axis of the next roller. It utilizes the property of entering at right angles to the two, and can circulate between two cylindrical rollers at a pitch proportional to the tilted angle. This predetermined angle is slight and is usually 0.1 to 30 degrees, preferably 1 to 20 degrees, and most preferably 2 to 10 degrees. The pitch of the same cord running on one roller is determined by this angle and the distance between the shaft centers of two pairs of cylindrical rollers. By using at least one of the two cylindrical rollers as the reed roller according to the present invention, the cord can travel a plurality of times on the reed roller with one cord. As a result, the travel distance of the cord in the device can be greatly increased, the device can be made compact, and the travel speed of the cord can be increased by one digit or more with the same device. The cylindrical roller paired with the cocoon roller may be a turn roller. However, if this roller is also a cocoon roller, the efficiency of drying and baking is further improved.
[0015]
There is a Gurjan system as another system in which the code circulates a plurality of times on the roller. The Gurjan method is a method used for continuous spinning of rayon, and can be said to be an application of the Nelson method in principle. The mechanism is such that a plurality of (usually 8) small-diameter rollers are arranged in a cylindrical shape inclined at a predetermined angle so that each roller can rotate, and when the cord runs on this cylinder, It is carried while moving horizontally by the amount of the slope of the roller. This predetermined angle is slight and is usually 0.1 to 30 degrees, preferably 1 to 20 degrees, and most preferably 2 to 10 degrees. The small-diameter roller is a roller having a smaller diameter than the heel roller, and has a smooth surface and does not need to be subjected to processing such as air permeability. In the present invention, a cylinder made of this combination of rollers is a saddle roller. In the Gurjan system, it is desirable that each small-diameter roller constituting the saddle roller is driven and rotated. However, in the case of a strong cord such as a tire cord, each drive is not necessarily required. Unlike the Nelson system, this Gurjan system is characterized in that it does not require a roller-like rotator separate from the roller, and the cord can circulate on one roller. However, even in the Gurjan system, when the cord is circulated between a pair of cylindrical rollers (at least one of which is a Gurjan roller), the path becomes longer, and a comb is provided between the two rotating rollers. Since the arrangement can be regulated, it is often used as a pair of rollers.
[0016]
In the Nelson method, the Gurjan method, and the like, the organic fiber cord can be stretched or contracted by changing the diameter of the reed roller during the process of the cord circulating on the reed roller. When the diameter of the reed roller increases during the running process, the cord path becomes longer and the cord is stretched. As the diameter of the heel roller decreases, the cord path becomes shorter and the cord contracts. In the dipping process of a cord made of nylon fiber or polyester fiber, stretching is usually performed between the drying and baking steps. In addition, the organic fiber may require a shrink heat treatment in order to remove residual strain and the like, and can be used as the shrink heat treatment.
[0017]
There are cases where the cord has a plurality of adhesion treatment steps such as a polyester fiber, such as a pre-adhesion treatment step and a post-adhesion treatment step. In addition, primer treatment may be necessary before full-scale adhesion. When there are a plurality of such adhesion processing means, the scissors roller of the present invention can be used at each adhesion processing stage. Since the adhesion processing means of the present invention is simple, the effectiveness of being compact is particularly enhanced when a plurality of processes are required.
[0018]
In the previous stage of the means for adhering the adhesive latex according to the present invention, a twist unwinder is provided to untwist the twisted cord to open between the fibers (in the case of combined yarn, between the constituent yarns), By impregnating the inside of the cord, the inside of the cord can be treated with an adhesive. By doing so, it is possible to obtain a high-quality rubber material such as improved bonding performance between rubber and cord and increased durability of adhesion. The untwisting means is described in detail in the prior invention of the present applicant (Japanese Patent Laid-Open No. 2001-336076) in a single rubber coating treatment, but is not limited to this example, and is used for bulky processing of multifilaments. Various means capable of untwisting can be used, such as using twisting means of the false twisting method for reverse twisting. Note that untwisting with a twister does not apply to weave weaves.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings. FIG. 1 shows an example of a drying / stretching / baking apparatus using a reed roller according to the present invention. FIG. A is a side view, and FIG. B is a cross-sectional view taken along the line aa in FIG. A cord 3 circulates in a Nelson manner between the reed roller 1 and the turn roller 2. The turn roller 2 is preferably composed of a large number of blades so that the number of contact points with the cord 3 is small. The scissors roller 1 is connected between the flanges 4a and 4b by a large number of blades 5. At the center of the saddle roller 1, a support frame 6 is provided. The flange 4 and the blade 5 are fixed to the support frame 6, and when the support frame 6 is driven to rotate, the saddle roller 1 rotates. . The cord 3 travels on the blade 5, but the tip of the blade 5 is thin, and the leading edge is R, so that the cord is not damaged. Further, the blade 5 is stepped from the middle and widened so that the diameter of the reed roller 1 is increased. The cord 3 circulates in a Nelson manner between the reed roller 1 and the turn roller 2, passes through the guide roller 7 from the middle, moves to a large diameter portion, and in the process of moving to the guide roller 7, the cord 3 is stretched. The In the figure, the diameters of both the reed roller 1 and the turn roller 2 are increased, but only one of the reed roller 1 and the turn roller 2 can be increased. Although FIG. 1 shows an example in which one code circulates for the sake of clarity, it can be circulated in units of a plurality of codes. Moreover, it is preferable to attach the brush roller 8 to remove glue residue and the like. In addition, it is preferable that the reed roller 1 is housed in a chamber and configured so that hot air is blown out from the reed roller 1 and the hot air passes through the cord 3 on the reed roller 1. Further, the small diameter portion and the large diameter portion on the reed roller are divided inside, and the corresponding chamber is also divided, and it is preferable that hot air having different temperatures is circulated. .
[0020]
FIG. 2 shows a principle diagram of the Nelson method. The rollers 11 and 12 have their axis directions shifted from parallel by an angle α, and the cord 13 exiting the roller 11 tries to enter at right angles to the roller 12 and the cord 13 exiting the roller 12. Tries to enter at right angles to the roller 11. As a result, the cord 13 is proportional to the angle α and the distance between the rollers 11 and 12, and the circulating pitch p is determined.
[0021]
FIG. 3 shows an example of a structure in which the cord circulates a plurality of times by the Gurjan method on the reed roller of the present invention, and shows an example in which the diameter of the reed roller is changed. FIG. A is a side view, and FIG. B is a sectional view taken along line aa in FIG. The scissors roller 21 has a large number of small-diameter rollers 22a, 22b,... Arranged on the circumference (the flanges supporting the small-diameter rollers and the like are omitted in the figure). The small-diameter rollers 22a, 22b,... Are configured to be freely rotatable, and adjacent rollers, for example, small-diameter rollers 22a and 22b are arranged so as to be inclined by β from the parallel lines b1 and b2 of the roller shaft. ing. As a result, the cord 23 circulates on the reed roller 21 by the Gurjan method. The small-diameter roller 22 has a step in the middle and has a large diameter, and the cord 23 is moved from the middle through the guide roller 24 to the larger-diameter side, and the cord is stretched in the course of this movement. Moreover, it is preferable to attach the brush roller 25 to remove glue residue and the like.
[0022]
FIG. 4 illustrates an example of a hot air circulation mechanism that penetrates between cords that circulate on the reed roller of the present invention. The scissors roller 31 rotates in the chamber 32, and the cord circulates on the surface thereof. Hot air is sucked from the suction port 33 on the side of the chamber 32, and a part of the humid air is exchanged by the hot air exchanger 35 through the duct 34 a and then passes through the filter 36. The hot air that has passed through the filter 36 is sent out by the fan 37, heated by the heater 38, and guided to the core portion 39 of the roller 31 by the duct 34b. The hot air sent to the core portion 39 of the reed roller 31 passes between the cord groups on the reed roller 31 and is discharged into the chamber 32. As described above, when the diameter of the roller roller is different as shown in FIGS. 1 and 3, the hot air is circulated by dividing the hot air blowing portion into a large diameter portion and a small portion. It is preferable that hot air at different temperatures is blown from both sides of the roller 31, and the chamber 32 is also partitioned for each hot air temperature and circulates for each hot air at each temperature. It is preferable that it is comprised. FIG. 4 shows an example in which hot air is discharged from the inside of the reed roller to the outside, but conversely, it is also possible to adopt a configuration in which the hot air is directed from the outside to the inside of the reed roller. In addition, although FIG. 4 illustrates an example in which the fan 37 is provided outside the saddle roller 31 and the chamber 32, the fan may be provided inside the saddle roller.
[0023]
FIG. 5 shows an example of a dipping process using the reed roller of the present invention. The cord group 41 is pulled out from a large number of bobbins 43 installed on the creel stand 42 by the rotation of the driven turn rollers 44a and 44b. The cord group 41 exiting the roller 44 passes through the adhesive latex in the glue bath 45 to adhere the latex to the cord group 41, and the amount of latex adhered to the cord group 41 by the nip pressure of the nip rollers 46a and 46b. To be constant. The cord group 41 to which a certain amount of latex adheres exits the nip roller 46 and is guided to the chamber 47. In the chamber 47, the cord group 41 circulates with the turn roller 2 of the reed roller 1 shown in FIG. 1 by the Nelson method, and drying, stretching, and baking are performed. The processed cord group 48 is guided by the rotation of the driven turn rollers 49a and 49b, wound around the individual winding bobbins 50, and processed into a processed dipping code. Although not shown in the drawing, the chamber 47 and the reed roller 1 are provided with the hot air circulation mechanism shown in FIG. 4 so that the hot air passes between the cords of the cord group 41 on the reed roller 1. Yes.
[0024]
FIG. 6 shows an example of the dipping process when the adhesive is two liquids. The cord group 41 is pulled out from a large number of bobbins 43 installed on the creel stand 42 by the rotation of the driven turn rollers 44a and 44b. The cord group 41 exiting the roller 44 passes through the adhesive latex of the glue bath 45 to adhere the latex to the cord group 41, and the amount of latex adhered to the cord group 41 is determined by the nip pressure of the nip rollers 46a and 46b. Keep it constant. The cord group 41 to which a certain amount of latex adheres exits the nip roller 46 and is guided to the first chamber 47. In the chamber 47, the cord group 41 circulates between the reed roller 1 and the turn roller 2 shown in FIG. 1 by the Nelson method, and drying, stretching, and baking are performed. The processed cord group 48 passes through the turn roller 51, passes through the adhesive latex of the second glue bath 52, adheres the latex to the cord group 48, and the nip pressure of the nip rollers 53a and 53b causes the cord group 48 to pass. The amount of latex adhering to is constant. The cord group 48 to which the second adhesive latex is attached is guided to the second chamber 54. In the second chamber 54, as in the case of the first chamber, the cord group 48 circulates between the reed roller 55 and the turn roller 56 by the Nelson method, and drying, stretching, and baking are performed. The cord group 57 processed in the second chamber 54 is guided by the rotation of the driven turn rollers 58a and 58b, and is wound around the individual winding bobbins 59 to be processed dipping cords. In FIG. 6, the cocoon roller 1 and the cocoon roller 55 are shown as examples of drying, stretching, and baking, respectively. However, in the cocoon roller 1, the diameter of the cocoon roller is not changed and only drying is performed. it can.
[0025]
FIG. Shown as a reference example Another example of a dipping process using a reed roller will show an example in which a code group passes only once on a reed roller. The cord group 61 is pulled out from a large number of bobbins 63 installed on the creel stand 62 by the rotation of the driven turn rollers 64a and 64b. In FIG. 7, the cords can be drawn from a large number of bobbins as compared with the case of the bobbin 43 of FIG. 5 or FIG. 6, and the cord group 41 composed of a large number of cords can be formed from the cord group 41 of FIG. And The cord group 61 exiting the roller 64 passes through the adhesive latex in the glue bath 65 to adhere the latex to the cord group 61, and the amount of latex adhered to the cord group 61 by the nip pressure of the nip rollers 66a and 66b. To be constant. The cord group 61 to which a certain amount of latex adheres exits the nip roller 66 and is guided to the drying chamber 67. In the drying chamber 67, the cord group 61 passes only once over the reed roller 68 and is guided to the stretching roller group 69. The diameter of the reed roller 68 is not changed as shown in FIG. 1, and only one type of hot air or dry hot air circulates between the individual cords of the cord group 61 on the reed roller 68. ing. As described above, the hot air penetrates between the individual cords, so that the air accompanying the cord group 1 is blown off, the hot air having a constant temperature is always supplied to the cords, and the latex adhering to the cords is dried.
[0026]
The cord group 61 obtained by drying the adhered latex in the drying chamber 67 is guided to stretching roller groups 69a, 69b, 69c, 69d, and 69e. By setting the speeds of the rollers 69c, 69d, and 69e faster than the speeds of the stretching roller groups 69a and 69b, the cord group 61 is stretched between them. If shrink heat treatment is desired depending on the type of cord, the rollers 69c, 69d, and 69e are made slower than the rollers 69a and 69b. The stretching roller group 69 is preferably heated to a temperature suitable for stretching and shrinking. The gode group 61 exiting the stretching roller group 69 is guided to the baking chamber 70. The inside of the baking chamber 70 is the same as the drying chamber 67 and is provided with a reed roller 71 and a hot air circulation mechanism. The baking process is basically different from the drying process in the temperature of hot air, and a temperature suitable for adhesive baking and a temperature suitable for heat treatment of the cord are selected. Further, the diameter of the reed roller 71 in the baking chamber 70 and the diameter of the reed roller 68 in the drying chamber 67 are determined from the ratio of the respective residence times and need not be the same. The cord group 72 in which the attached adhesive is baked or the cord is heat-treated in the baking chamber 70 is wound around the individual bobbins 74 via the driven turn rollers 73a and 73b, and the cord dipped. Is done. In the figure, an example in which each bobbin is wound up is shown, but the whole can also be wound into a beam. Although not shown in FIG. 7, the combs are provided at the entrances of the turn roller 64, the drying chamber 67, the stretching roller group 69, the baking chamber 70, the turn roller 73, and the like in FIG. Individual arrangements are kept constant. Further, in FIG. 7, weave weave or the like can be used instead of the cord group 61.
[0027]
FIG. 8 shows the case where a twisting tool is provided in the dipping process of the present invention. Immediately before the cord 81 having a twist is immersed in the adhesive latex 83 in the glue bath 82, the twist is returned by the untwisting tool 84. The cord 81 which has been untwisted, in that state, the adhesive latex penetrates between the individual yarns or filaments of the cord. The cord 86 that has passed through the turn rollers 85 a and 85 b in the paste bath 82 is positively rotated in the twisting direction of the original cord 81 by a rotor 88 that is rotated by a drive motor 87 that rotates the untwisting tool 84. As a result, the original twisted state is surely returned to the drying step. FIG. 9 shows an example of a twisting tool, which is a prior invention of the present inventor and is described in detail in Japanese Patent Application Laid-Open No. 2001-336076. FIG. 10 shows an example of a cross-section of the cord 86 dipped to the inside by the twisting means with respect to the original cord 81 of A, and shows that the adhesive 89 is adhered to the inside of the cord. .
[0028]
[ Reference example The bicycle tire cord was dipped using the dipping process of FIG. As for the cord used, 210 cords of 940 dtex / 2 of nylon 66 were fed out to form a cord group. The adhesive latex was an RFL formulation for nylon tire cords. That is, the RF resin solution is prepared with 11.0 parts of resorcin, 16.0 parts of formalin (37%), 3 parts of caustic soda (10%), and 235.8 parts of soft water. To 266 parts of this RF resin solution, 172 parts of Nippon 12518FS (40.5%), 74.1 parts of LX112 (40.5%) and 73.6 parts of soft water were added as rubber latex. Aging was carried out at 20 ° C. for about 20 hours to obtain RFL. The diameter of the roller in FIG. 7 is 1000 mm for both drying and baking, the width of the blade is 440 mm (code pitch is about 2 mm), the line speed is 4 m / min, and the drawing process (drying hot air 155 ° C.) is passed through the drawing process. Then, the film was stretched by 8.5% and then baked (hot air hot air temperature 220 ° C.). The amount of adhesive attached to the obtained dipping cord was 5.2% (percentage of the cord weight), the heat shrinkage rate at 160 ° C. was 2.9%, the tensile strength was 7.8 cN / dtex, and the tensile elongation was 18.5. %, And the color of the dipping cord was almost the same as that of a commercially available weave weave.
[0029]
[ Example ]
[Example 1 Using the dipping process of FIG. Reference example The tire latex cord was dipped using the adhesive latex used in the above. As the cord used, four nylon 66 2100 dtex / 2 were used. The cocoon roller used employs the Nelson method shown in FIG. 5, and both the cocoon roller 1 and the turn roller 2 shown in FIG. 5 are cocoon rollers. Both cocoon rollers have a diameter of 500 mm, and the width of the portion where dry hot air is blown out. The width of the portion where the hot air blows out was 550 mm, and the width was 550 mm. The line speed was 150 m / min through a drying step (dry hot air 155 ° C.), and in the stretching step, the film was stretched 8.2%, followed by baking (hot air hot air temperature 220 ° C.). The amount of adhesive attached to the obtained dipping cord is 5.5%, the heat shrinkage rate is 3.2%, the tensile strength is 8.0 cN / dtex, the tensile elongation is 17.8%, and the hue of the dipping cord is There was almost no difference from that normally produced with a weave weave.
[0030]
[Comparative example] Example 1 In the case where the hot air is not penetrated and only the reed roller is rotated in the hot air chamber under the conditions of 1 In order to perform dipping up to the color tone, it was necessary to reduce the line speed to 28 m / min.
[0031]
【The invention's effect】
By using the reed roller of the present invention, a compact and simple dipping means can be provided, and the energy efficiency is good. In addition, since a constant temperature is always applied, a high-quality dipping code with stable adhesion could be provided. In addition, dipping codes necessary for various types of rubber products, such as various types of cords and rubber types, can be supplied by a simple means in the required amount when necessary.
[Brief description of the drawings]
FIG. 1 shows an example of a Nelson type scissor roller of the present invention, in which A is a side view and B is a cross-sectional view.
FIG. 2 schematically shows a principle diagram that a code circulates in the Nelson method of the present invention.
FIGS. 3A and 3B show an example of a Gurjan-type saddle roller according to the present invention, in which A is a side view and B is a cross-sectional view.
FIG. 4 schematically shows an example of a hot air circulation mechanism of the present invention.
FIG. 5 is a side view showing an example of a dipping process in which a code circulates according to the Nelson method of the present invention.
FIG. 6 is a side view showing an example in which an adhesive is applied in two stages in the dipping process of the present invention.
[Fig. 7] Shown in reference example In the dipping process, an example in which a cord runs only once on a single roller is shown in a side view.
FIG. 8 is a side view of a process showing an example of impregnating an adhesive latex using the untwisting tool of the present invention.
FIG. 9 is a conceptual diagram of a twisting tool of the present invention.
FIG. 10 shows a cross-sectional view of the cord, with A before processing and B after processing.

Claims (3)

A latex adhesion mechanism configured to adhere an adhesive latex to a cord made of organic fibers;
A pair of rollers in which the roller that the cord circulates on the surface and the cylindrical roller that is paired with the roller are disposed with their respective axial directions inclined by a predetermined angle from parallel,
A chamber containing a該篭roller and said cylindrical roller therein,
A hot air circulation mechanism configured so that hot air passes between the cords in a process in which the cord circulates between the saddle roller and the cylindrical roller ;
Dipping code production apparatus characterized in that it comprises a. The saddle roller is a saddle roller in which a plurality of small diameter roller groups are arranged in the circumferential direction to form a cylinder, and the axial direction of each of the small diameter rollers of the plurality of small diameter roller groups is an adjacent small diameter roller. The dipping cord manufacturing apparatus according to claim 1 , wherein the cord is arranged so as to be inclined with respect to the axial direction by a predetermined angle from the parallel, so that the cord can circulate a plurality of times on the saddle roller. . 2. The dipping code manufacturing apparatus according to claim 1 , wherein a diameter of the reed roller is changed in the reed roller.

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