JP2019059073A - Cord spacing adjustment mechanism, and ply material manufacturing apparatus and ply material manufacturing method - Google Patents

Abstract

To provide a manufacturing technology of a ply material capable of manufacturing a stable ply material economically without reduction in productivity because replacement of the cord spacing adjustment jig is not necessary even when a width of the ply material is changed.SOLUTION: A cord spacing adjustment mechanism for adjusting spacing of a steel cord in manufacturing of the ply material includes the cord spacing adjustment jig disposed in the vicinity of a sorter between the sorter through which an unwound steel cord is inserted and arranged and a die plate, and rotating means for rotating the cord spacing adjustment jig. The code spacing adjustment jig is formed in a same width size as a sorter width, and a partitioning portion is provided at the same position as the insertion portion of the sorter, thus, a width of the cord spacing adjustment jig with respect to a steel cord travelling direction is adjusted to a width of the die plate as the rotating means rotates the cord spacing adjustment jig, which has moved to a predetermined position between the sorter and the die plate, with a center in a width direction as a fulcrum.SELECTED DRAWING: Figure 2

Description

  The present invention provides a cord spacing adjustment mechanism provided for adjusting cord spacing in the arrangement of steel cords in the manufacture of a ply material having a steel cord topped with a steel cord, such as a breaker or a belt, and the cord BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ply material manufacturing apparatus and a ply material manufacturing method provided with a space adjustment mechanism.

  In the manufacture of a pneumatic tire, a ply material such as a breaker or a belt in which rubber is topped on a steel cord (hereinafter, also simply referred to as a "cord") is used. And such ply material is manufactured by topping rubber on both sides of the cord arranged at a predetermined interval (for example, patent document 1).

  At this time, the performance of the tire can not be stably exhibited unless the rubber is topped in a state in which the cords are uniformly arranged, so conventionally, before topping the rubber with the die plate of the rubber extruder, It is performed to adjust the code interval in accordance with the width of the die plate.

  Specifically, the cords unwound from the plurality of reels are first passed one by one to each insertion portion of the sorter. This can prevent the cords from overlapping. Next, one cord at a time is passed through each sorting portion provided in a comb-like cord interval adjusting jig formed to a width corresponding to the width of the die plate, each cord having passed through the sorter. As a result, the cords are arranged substantially in parallel at predetermined intervals (ends), and thereafter, they are sent to the die plate and the rubber is topped.

  Then, when the width of the ply material to be manufactured is changed, the code interval adjusting jig is replaced with a code interval adjusting jig having a width corresponding to the width of the die plate.

JP, 2014-237263, A

  However, it is not preferable in terms of cost to prepare many cord spacing adjustment jigs adapted to the width of the ply material, and the following problems have been encountered also in the manufacture of the ply material.

  That is, it is not easy to pass the cords after passing the sorter one by one to the sorting portion of the replaced cord interval adjustment jig, which takes time for the operation, which may cause a decrease in productivity. . Then, if two separate cords enter into one sorting section by mistake, a ply material having a non-uniform code arrangement is produced.

  For this reason, there is no need to replace the cord spacing adjustment jig even if the width of the ply material is changed, and there is a manufacturing technique of the ply material which can economically produce a stable ply material without causing a decrease in productivity. It was being asked.

  The inventors of the present invention conducted intensive studies and found that the above-mentioned problems could be solved by the invention described below, and completed the present invention.

The invention according to claim 1 is
A cord spacing adjustment mechanism for adjusting cord spacing in the arrangement of the steel cords in accordance with the width of a die plate in the manufacture of a ply material in which steel cords are coated with rubber,
A cord interval adjusting jig disposed in the vicinity of the sorter between the sorter and the die plate which inserts and arranges the steel cords unwound from the reels through the insertion portion;
A rotating means for rotating the cord interval adjusting jig;
The cord interval adjusting jig is formed to have the same width size as the width of the sorter, and a sorting portion is provided at the same position as the insertion portion of the sorter,
The cord interval with respect to the traveling direction of the steel cord by rotating the cord interval adjusting jig which has moved to a predetermined position between the sorter and the die plate, with the center of the width direction as a fulcrum. It is a cord interval adjustment mechanism characterized by adjusting the interval of the steel cords by adjusting the width of the adjustment jig to the width of the die plate.

The invention according to claim 2 is
A cord spacing adjustment mechanism for adjusting cord spacing in the arrangement of the steel cords in accordance with the width of a die plate in the manufacture of a ply material in which steel cords are coated with rubber,
And a cord interval adjusting jig disposed in the vicinity of the sorter between the sorter and the die plate for inserting and arranging the steel cords unwound from the reels through the insertion portion;
The cord interval adjusting jig is formed to have the same width size as the width of the sorter, and a sorting portion is provided at the same position as the insertion portion of the sorter,
Further, the present invention is a cord interval adjustment mechanism characterized in that it can be expanded and contracted in the width direction.

The invention according to claim 3 is
The cord spacing adjustment jig has a sorting portion formed in an accordion type, and the width of the cord spacing adjustment jig is expanded and contracted by the deformation of the sorting portion formed in the accordion type. It is a cord interval adjustment mechanism according to claim 2, characterized in that:

The invention according to claim 4 is
A ply material manufacturing apparatus for manufacturing a ply material in which a steel cord is coated with rubber,
A sorter for inserting and arranging a steel cord unwound from a reel through an insertion portion;
And a die plate for covering the arrangement of the steel cords with rubber,
Furthermore, the cord interval adjusting mechanism according to any one of claims 1 to 3 is provided between the sorter and the die plate.

The invention according to claim 5 is
5. A ply material manufacturing apparatus according to claim 4, which is a ply material manufacturing apparatus for manufacturing a breaker or a belt.

The invention according to claim 6 is
A method for producing a ply material, comprising the steps of coating a steel cord with rubber using the ply material production apparatus according to claim 4 or 5 to produce a ply material,
The steel cord unwound from the reel is inserted and arranged in the insertion portion of the sorter, and the steel cord inserted in the sorter is inserted through the sorting portion of the cord interval adjustment jig,
Next, after moving the cord interval adjusting jig to a predetermined position between the sorter and the die plate, the cord interval adjusting jig is rotated or the width of the cord interval adjusting jig is reduced. Adjusting the distance between the steel cord and the traveling direction to the die plate width,
Next, the method for producing a ply material is characterized in that the arrangement of steel cords in which the spacing of the steel cords is adjusted is fed into the die plate to coat the rubber.

The invention according to claim 7 is
7. The method of claim 6, wherein the breaker or belt is manufactured.

  According to the present invention, there is no need to replace the cord spacing adjustment jig even if the width of the ply material is changed, and it is possible to economically manufacture a stable ply material without causing a decrease in productivity. We can provide manufacturing technology.

It is a figure explaining the ply material manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure explaining the ply material manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a figure explaining the ply material manufacturing apparatus which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a figure which shows the whole apparatus, (b) is a part of the code | cord space adjustment jig seen from the cord advancing direction. It is an enlarged view. It is a figure explaining the ply material manufacturing apparatus which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a figure which shows the whole apparatus, (b) is a part of the code | cord space adjustment jig seen from the cord advancing direction. It is an enlarged view.

  Hereinafter, based on an embodiment, the present invention is concretely explained using a drawing.

1. First Embodiment In the present embodiment, the width of the cord interval adjusting jig with respect to the advancing direction of the steel cord is adjusted to the width of the die plate by rotating the cord interval adjusting jig around the center in the width direction. Then, it is a ply material manufacturing apparatus provided with a cord spacing adjustment mechanism for adjusting the spacing of steel cords.

  1 and 2 are diagrams for explaining a ply material manufacturing apparatus according to the present embodiment, and FIG. 1 shows a state in which a cord interval adjustment jig is disposed at a position close to the sorter and the cord is inserted. FIG. 2 shows a state where the cord interval adjustment jig is rotated to adjust the cord interval.

(1) Ply Material Manufacturing Device As shown in FIG. 1, the ply material manufacturing device according to the present embodiment includes a sorter 3, a die plate 4, and a cord spacing adjustment jig 6, and cord spacing adjustment. The jig 6 is disposed in the vicinity of the sorter 3 between the sorter 3 and the die plate 4.

  The sorter 3 is provided to align the multiple cords (steel cords) 2 unwound from the reel 1 by inserting them into the cord insertion parts 3a corresponding to the respective ones, and to prevent the cords 2 from overlapping. The die plate 4 is provided for coating the rubber on the code arrangement body 2A in which the steel cords 2 are arranged at predetermined intervals to produce the ply material M.

  As shown in FIG. 1, cords 2 are wound around each of the reels 1 and arranged at predetermined intervals.

  The sorter 3 is provided with a cord insertion portion 3a into which the unwound cord 2 is inserted corresponding to each reel.

  The die plate 4 is attached to the extrusion head of a rubber extruder main body (not shown). The rubber extruder main body has a well-known structure in which a screw shaft is housed in a cylinder provided with a rubber charging port, and rotation of the screw shaft causes plasticization of the charged rubber to the die plate 4 Feed and coat both sides of the cord array 2A with rubber.

(2) Cord Interval Adjustment Mechanism Next, the cord interval adjustment mechanism in the present embodiment will be described. As shown in FIG. 1, the cord interval adjustment mechanism 5 includes a cord interval adjustment jig 6 for arranging the respective cords 2 inserted into the cord insertion part 3 a in order to send them to the die plate 4, and the cord interval adjustment jig 6. The rotating means is provided with rotating means, and after the rotating means is moved to a predetermined position between the sorter 3 and the die plate 4, steel is rotated by rotating the cord interval adjusting jig 6 about the center in the width direction. The width of the cord interval adjustment jig 6 with respect to the traveling direction of the cords 2 is adjusted to the width of the die plate 4 to adjust the interval between the steel cords 2.

(A) Cord interval adjusting jig The cord interval adjusting jig 6 is formed to have the same width as the sorter 3, and the sorting section 6a is provided at equal intervals (d) at positions corresponding to the cord insertion sections 3a of the sorter 3. ing. The cord arrangement body 2A is formed by inserting the cord 2 inserted into the cord insertion part 3a of the sorter 3 into the dividing part 6a.

  At this time, the cord interval adjusting jig 6 is formed to have the same width as the sorter 3 and the sorting section 6 a is provided at a position corresponding to the cord insertion section 3 a of the sorter 3. At the same time as it is inserted into the cord insertion portion 3a, the division portion 6a can be easily inserted. Then, since it is not generated that two cords are accidentally inserted in one dividing part, it is possible to prevent the production of a ply material having a non-uniform code arrangement.

(B) Rotating means The rotating means is adjusted to the width of the die plate 4 so that the code array 2A arranged by the code interval adjusting jig 6 is introduced substantially parallel to the die plate 4. In the present embodiment, as shown in FIG. 2, after the cord interval adjustment jig 6 is moved to a predetermined position between the sorter 3 and the die plate 4, the cord interval adjustment is performed. The width of the cord interval adjustment jig 6 with respect to the advancing direction of the steel cord 2 is adjusted to the width of the die plate 4 by rotating the jig 6 at an angle θ with respect to the advancing direction of the cord 2 with the center in the width direction as a fulcrum. Thus, the distance between the steel cords 2 can be adjusted.

  In this manner, by adjusting the width of the cord interval adjustment jig 6 with respect to the traveling direction of the steel cord, the cord interval adjustment jig 6 is not replaced even if the width of the ply material M is changed. Each cord 2 can be introduced substantially parallel to the die plate 4 to produce the ply material M. In addition, since it is possible to manufacture various ply materials M with one cord interval adjustment jig 6, it is preferable in view of cost.

(3) Production of Cord Ply The cord ply in the present embodiment is manufactured using the above-described cord ply manufacturing apparatus. Specifically, first, the long cords 2 unwound from the plurality of reels 1 are allowed to pass through the respective cord insertion portions 3 a of the sorter 3, and then the cord interval adjustment jig 6 positioned close to the sorter 3 Are inserted into the respective dividing parts 6a.

  At this time, as described above, since the cord interval adjustment jig 6 is formed to have the same width as the sorter 3, each cord 2 can be easily and reliably inserted into each sorting portion 6a.

  Next, the cord interval adjusting jig 6 in which each cord 2 is inserted into each dividing portion 6a is moved to a position where it can be rotated along the advancing direction of the cord 2, and thereafter, the cord interval adjusting jig 6 Is rotated at an angle θ, so that the cord spacing is adjusted so that the widths of the cord spacing adjustment jig 6 and the cord array 2A match the width of the die plate 4.

  Next, the cord arrangement 2A with the adjusted cord spacing is introduced into the die plate 4 and coated with rubber to produce the ply material M. At this time, since the width of the code array 2A is matched to the width of the die plate 4, each code 2 can be introduced substantially parallel to the die plate 4, and the code array stabilizes the ply material which is uniform. Can be manufactured.

2. Second Embodiment In the present embodiment, a cord interval adjusting steel cord interval is adjusted by adjusting the width of the cord interval adjusting jig to the width of the die plate using an expandable cord interval adjusting jig. It is a ply material manufacturing apparatus provided with the adjustment mechanism.

  FIGS. 3 and 4 are diagrams for explaining the ply material manufacturing apparatus according to the present embodiment, and FIG. 3 shows a state in which the cord interval adjustment jig is disposed at a position close to the sorter and the cord is inserted. FIG. 4 shows a state in which the cord interval adjustment jig is extended and contracted to adjust the cord interval. In each of the drawings, (a) is a view showing the entire apparatus, and (b) is a partially enlarged view of the cord interval adjustment jig as viewed from the cord traveling direction.

  In the present embodiment, as shown in FIG. 3 (b), the cord interval adjusting jig 6 is divided into a plurality of sections 6a (see FIG. 3) by a plurality of sets of links 6b connected by pins and partition bodies 6c arranged in parallel. 3 (a)) is formed in accordion type. Then, in the present embodiment, after moving the cord interval adjustment jig 6 to a predetermined position between the sorter 3 and the die plate 4, the cord interval adjustment jig 6 is contracted from both sides to accordion type By changing the width of the partitioning body 6c of the cord interval adjusting jig 6 by changing the dividing portion formed in the width of the cord interval adjusting jig 6 with respect to the traveling direction of the steel cord 2 Can be adjusted to adjust the distance between the steel cords 2.

  Specifically, first, when the cord 2 is inserted into the sorter 3, as shown in FIG. 3A, the cord interval adjustment jig 6 is extended to the same width as the sorter 3, and As shown to (b), the space | interval to which the cord 2 is penetrated is fully ensured. Therefore, as in the case of the first embodiment, the cord 2 can be easily inserted into the sorting portion 6a while being inserted into the cord insertion portion 3a of the sorter 3.

  Next, as shown in FIG. 4 (a), after moving the cord interval adjustment jig 6 to a predetermined position between the sorter 3 and the die plate 4, as shown in FIG. 4 (b), the cord The width of the space adjusting jig 6 is reduced to adjust the space d of the dividing portion 6a, and the width of the cord array 2A is adjusted to match the width of the die plate 4.

  For this reason, even if the width of the ply material M is changed, each cord 2 of the cord array 2A is introduced substantially parallel to the die plate 4 without replacing the cord interval adjustment jig, and the ply material M is manufactured. can do.

  In each of the above-described embodiments, as the steel cord, a single-twisted steel cord of 1 × n configuration, a layered twisted steel cord of k + m configuration (n is an integer of 1 to 27, k is 1 to 1) as in the conventional case. An integer of 10, m is an integer of 1 to 8), a three-layer twisted steel cord of a + b + c configuration (a is an integer of 1 to 3, b is an integer of 1 to 9, c is an integer of 1 to 13), A brass-plated high tension cord can be used.

3. Effects of the Present Embodiment By applying the first embodiment and the second embodiment described above, the following effects can be obtained.

(1) In the present embodiment, when the cord is inserted, the sorter and the cord insertion portion of the sorter face the sorting portion of the cord spacing adjustment jig with the same size of the cord spacing adjustment jig. As such, they can be inserted through the sorter and the cord interval adjustment jig in one insertion, which is efficient and can be reliably inserted one by one.

(2) And, in the present embodiment, since the width of the cord array can be easily changed to the width of the die plate without replacing the cord spacing adjustment jig, production of ply materials of different sizes is possible. Also in the case of replacing the cord interval adjustment jig, the trouble of inserting the cord again becomes unnecessary.

(3) As a result of the above, when changing the ply material, the time required to replace the cord interval adjustment jig and the time for inserting the cord into the replaced cord interval adjustment jig can be shortened. Can contribute to the improvement of productivity.

(4) In addition, since various cord interval adjustment jigs are not required, the manufacturing cost and storage cost of the cord interval adjustment jig can be reduced.

1. Production of Ply Material A cord using the apparatus for producing a ply material having the same configuration as that of the first embodiment described above (Example 1) and the apparatus for producing a ply material having the same configuration as that of the second embodiment (Example 2) The breaker was manufactured as a ply material without replacing the spacing adjustment jig.

  For comparison, a breaker was similarly manufactured using a conventional replacement type ply material manufacturing apparatus for a cord spacing adjustment jig (comparative example). In this case, the number of times of replacement of the cord interval adjustment jig was 9 times / day (time required for replacement: about 10 minutes / time).

2. Evaluation items (1) Improvement of operation loss The improvement of operation loss by not replacing the code interval adjustment jig was evaluated.

(2) Process passability About each manufactured breaker, the splashing height at the time of cutting was measured, and the wrinkles to a cord were evaluated.

3. Evaluation Results (1) Improvement of Work Loss In Examples 1 and 2, it was confirmed that work loss improvement of 500 hours or more can be achieved annually because replacement of the cord interval adjustment jig is unnecessary.

(2) Process passability With regard to the process passability, the same results as those of the comparative example are obtained in all of Examples 1 and 2. Even if the production is performed without replacing the cord interval adjustment jig, It was confirmed that there was no problem in quality.

  As mentioned above, although the present invention was explained based on an embodiment, the present invention is not limited to the above-mentioned embodiment. Various modifications can be made to the above embodiment within the same and equivalent scope of the present invention.

1 reel 2 code (steel code)
2A code arrangement 3 sorter 3a code insertion part 4 die plate 5 code interval adjustment mechanism 6 code interval adjustment jig 6a dividing section 6b link 6c partition body d dividing section interval M ply material θ cord interval adjusting jig inclination angle

Claims (7)

A cord spacing adjustment mechanism for adjusting cord spacing in the arrangement of the steel cords in accordance with the width of a die plate in the manufacture of a ply material in which steel cords are coated with rubber,
A cord interval adjusting jig disposed in the vicinity of the sorter between the sorter and the die plate which inserts and arranges the steel cords unwound from the reels through the insertion portion;
A rotating means for rotating the cord interval adjusting jig;
The cord interval adjusting jig is formed to have the same width size as the width of the sorter, and a sorting portion is provided at the same position as the insertion portion of the sorter,
The cord interval with respect to the traveling direction of the steel cord by rotating the cord interval adjusting jig which has moved to a predetermined position between the sorter and the die plate, with the center of the width direction as a fulcrum. A cord interval adjusting mechanism, adjusting an interval of the steel cords by adjusting a width of an adjusting jig to a width of the die plate. A cord spacing adjustment mechanism for adjusting cord spacing in the arrangement of the steel cords in accordance with the width of a die plate in the manufacture of a ply material in which steel cords are coated with rubber,
And a cord interval adjusting jig disposed in the vicinity of the sorter between the sorter and the die plate for inserting and arranging the steel cords unwound from the reels through the insertion portion;
The cord interval adjusting jig is formed to have the same width size as the width of the sorter, and a sorting portion is provided at the same position as the insertion portion of the sorter,
Furthermore, the cord interval adjustment mechanism is configured to be able to expand and contract in the width direction.   The cord spacing adjustment jig has a sorting portion formed in an accordion type, and the width of the cord spacing adjustment jig is expanded and contracted by the deformation of the sorting portion formed in the accordion type. The cord interval adjustment mechanism according to claim 2, characterized in that: A ply material manufacturing apparatus for manufacturing a ply material in which a steel cord is coated with rubber,
A sorter for inserting and arranging a steel cord unwound from a reel through an insertion portion;
And a die plate for covering the arrangement of the steel cords with rubber,
Furthermore, the code | cord | chord space | interval adjustment mechanism of any one of Claim 1 thru | or 3 is provided between the said sorter and the said die plate, The ply material manufacturing apparatus characterized by the above-mentioned.   The apparatus for producing a ply material according to claim 4, which is a ply material producing apparatus for producing a breaker or a belt. A method for producing a ply material, comprising the steps of coating a steel cord with rubber using the ply material production apparatus according to claim 4 or 5 to produce a ply material,
The steel cord unwound from the reel is inserted and arranged in the insertion portion of the sorter, and the steel cord inserted in the sorter is inserted through the sorting portion of the cord interval adjustment jig,
Next, after moving the cord interval adjusting jig to a predetermined position between the sorter and the die plate, the cord interval adjusting jig is rotated or the width of the cord interval adjusting jig is reduced. Adjusting the distance between the steel cord and the traveling direction to the die plate width,
Next, the arrangement of the steel cords in which the spacing of the steel cords is adjusted is fed to the die plate to coat the rubber.   7. The method of claim 6, wherein a breaker or a belt is manufactured.

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