JP6965661B2 - Cord spacing adjustment mechanism and ply material manufacturing equipment and ply material manufacturing method - Google Patents

Description

The present invention provides a cord spacing adjusting mechanism provided for adjusting the cord spacing in the arrangement of the steel cords in the manufacture of a ply material such as a breaker or a belt to which rubber is topping (coated) on the steel cord, and the cord. The present invention relates to a ply material manufacturing apparatus provided with an interval adjusting mechanism and a ply material manufacturing method.

In the manufacture of pneumatic tires, ply materials such as circuit breakers and belts, which are steel cords (hereinafter, also simply referred to as “cords”) topped with rubber, are used. Then, such a ply material is manufactured by topping rubber on both sides of the cords arranged at predetermined intervals (for example, Patent Document 1).

At this time, if the rubber is not topping with the cords evenly arranged, the tire performance cannot be stably exhibited. Therefore, conventionally, before topping the rubber with the die plate of the rubber extruder, The cord spacing is adjusted according to the width of the die plate.

Specifically, each cord unwound from a plurality of reels is first passed through each insertion portion of the sorter one by one. This makes it possible to prevent the cords from overlapping each other. Next, each cord that has passed through the sorter is passed through each division portion provided in the comb-shaped cord spacing adjusting jig formed to have a width corresponding to the width of the die plate. As a result, the cords are arranged substantially in parallel at predetermined intervals (ends), and then sent to the die plate to be topped with rubber.

Then, when the width of the manufactured ply material was changed, the cord spacing adjusting jig was replaced with a cord spacing adjusting jig having a width corresponding to the width of the die plate.

Japanese Unexamined Patent Publication No. 2014-237263

However, it is not preferable in terms of cost to prepare a large number of cord spacing adjusting jigs according to the width of the ply material, and there are the following problems in the production of the ply material.

That is, it is not easy to pass the cords after passing the sorter one by one through the dividing portion of the replaced cord interval adjusting jig, and the work takes time, which may lead to a decrease in productivity. .. If two cords are mistakenly inserted in one dividing portion, a ply material having a non-uniform cord arrangement will be manufactured.

Therefore, even if the width of the ply material is changed, it is not necessary to replace the cord spacing adjustment jig, and a ply material manufacturing technology capable of economically manufacturing a stable ply material without causing a decrease in productivity is available. I was asked.

The present inventor has conducted diligent studies and found that the above-mentioned problems can be solved by the invention described below, and has completed the present invention.

The invention according to claim 1
A cord spacing adjusting mechanism that adjusts the cord spacing in the steel cord arrangement according to the width of the die plate in the manufacture of a ply material in which a steel cord is coated with rubber.
A cord spacing adjustment jig arranged in the vicinity of the sorter between the sorter and the die plate for arranging the steel cords unwound from the reel through the insertion portion, and
It is equipped with a rotating means for rotating the cord interval adjusting jig.
When the cord spacing adjusting jig is formed to have the same width as the width of the sorter and a dividing portion is provided at the same position as the insertion portion of the sorter, the steel cord is inserted into the insertion portion of the sorter. At the same time, it can be inserted into the dividing portion of the cord spacing adjusting jig.
The rotating means rotates the cord spacing adjusting jig that has moved to a predetermined position between the sorter and the die plate with the center in the width direction as a fulcrum, thereby causing the cord spacing with respect to the traveling direction of the steel cord. The cord spacing adjusting mechanism is characterized in that the width of the adjusting jig is adjusted to the width of the die plate to adjust the spacing of the steel cords.

The invention according to claim 2
A cord spacing adjusting mechanism that adjusts the cord spacing in the steel cord arrangement according to the width of the die plate in the manufacture of a ply material in which a steel cord is coated with rubber.
It is equipped with a cord spacing adjustment jig arranged in the vicinity of the sorter between the sorter and the die plate for arranging the steel cords unwound from the reel through the insertion portion.
When the cord spacing adjusting jig is formed to have the same width as the width of the sorter and a dividing portion is provided at the same position as the insertion portion of the sorter, the steel cord is inserted into the insertion portion of the sorter. At the same time, it can be inserted into the dividing portion of the cord spacing adjusting jig.
Further, the cord spacing adjusting mechanism is characterized in that it can be expanded and contracted in the width direction.

The invention according to claim 3
The cord spacing adjusting jig has a dividing portion formed in an accordion type, and the width of the cord spacing adjusting jig is expanded or contracted by deformation of the dividing portion formed in the accordion type. The code interval adjusting mechanism according to claim 2, wherein the cord spacing is adjusted.

The invention according to claim 4
A ply material manufacturing device that manufactures a ply material in which a steel cord is coated with rubber.
A sorter that inserts the steel cord unwound from the reel into the insertion part and arranges it,
The steel cord array is provided with a die plate for coating rubber.
Further, the ply material manufacturing apparatus is characterized in that the cord spacing 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
The ply material manufacturing apparatus according to claim 4, wherein the ply material manufacturing apparatus is for manufacturing a breaker or a belt.

The invention according to claim 6
A ply material manufacturing method for manufacturing a ply material by coating a steel cord with rubber using the ply material manufacturing apparatus according to claim 4 or 5.
The steel cord unwound from the reel is inserted through the insertion portion of the sorter and arranged, and the steel cord inserted through the sorter is inserted into the dividing portion of the cord spacing adjustment jig.
Next, after moving the cord spacing adjusting jig to a predetermined position between the sorter and the die plate, the cord spacing adjusting jig is rotated or the width of the cord spacing adjusting jig is reduced. , Adjust the distance of the steel cord with respect to the traveling direction to the die plate width,
Next, the ply material manufacturing method is characterized in that an array of steel cords having an adjusted interval between the steel cords is sent to the die plate to cover the rubber.

The invention according to claim 7
The ply material manufacturing method according to claim 6, wherein a breaker or a belt is manufactured.

According to the present invention, even if the width of the ply material is changed, it is not necessary to replace the cord interval adjusting jig, and a stable ply material can be economically manufactured without causing a decrease in productivity. Manufacturing technology can be provided.

It is a figure explaining the ply material manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a figure explaining the ply material manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a figure explaining the ply material manufacturing apparatus which concerns on 2nd Embodiment of this invention, (a) is the figure which shows the whole apparatus, (b) is the part of the chord spacing adjustment jig seen from the chord progression direction. It is an enlarged view. It is a figure explaining the ply material manufacturing apparatus which concerns on 2nd Embodiment of this invention, (a) is the figure which shows the whole apparatus, (b) is the part of the chord spacing adjustment jig seen from the chord progression direction. It is an enlarged view.

Hereinafter, the present invention will be specifically described with reference to the drawings based on the embodiments.

1. 1. First Embodiment In this embodiment, the width of the cord spacing adjustment jig with respect to the traveling direction of the steel cord is adjusted to the width of the die plate by rotating the cord spacing adjusting jig with the center in the width direction as a fulcrum. This is a ply material manufacturing apparatus provided with a cord spacing adjusting mechanism for adjusting the spacing between steel cords.

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

(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 adjusting jig 6, and cord spacing adjusting. The jig 6 is arranged between the sorter 3 and the die plate 4 in the vicinity of the sorter 3.

The sorter 3 is provided in order to prevent the cords 2 from overlapping by aligning each of the plurality of cords (steel cords) 2 unwound from the reel 1 by inserting them into the corresponding cord insertion portions 3a. The die plate 4 is provided to cover the cord array 2A in which the steel cords 2 are arranged at predetermined intervals with rubber to prepare the ply material M.

As shown in FIG. 1, cords 2 are wound around each of the reels 1 and are 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 an extrusion head of a rubber extruder main body (not shown). The rubber extruder main body has a well-known structure in which the screw shaft is housed in a cylinder provided with a rubber insertion port, and the inserted rubber is plasticized on the die plate 4 by the rotational drive of the screw shaft. It is sent out, and both sides of the cord array 2A are covered with rubber.

(2) Cord Spacing Mechanism Next, the cord spacing adjusting mechanism according to the present embodiment will be described. As shown in FIG. 1, the cord spacing adjusting mechanism 5 includes a cord spacing adjusting jig 6 for arranging the cords 2 inserted through the cord insertion portion 3a for sending to the die plate 4, and a cord spacing adjusting jig 6. A rotating means for rotating is provided, and the rotating means moves to a predetermined position between the sorter 3 and the die plate 4, and then rotates the cord interval adjusting jig 6 with the center in the width direction as a fulcrum to make steel. The width of the cord spacing adjustment jig 6 with respect to the traveling direction of the cord 2 is adjusted to the width of the die plate 4 to adjust the spacing between the steel cords 2.

(A) Cord spacing adjustment jig The cord spacing adjusting jig 6 is formed to have the same width as the sorter 3, and the dividing portions 6a are provided at equal intervals (d) at positions corresponding to the cord insertion portions 3a of the sorter 3. ing. The cord array 2A is formed by inserting the cord 2 inserted through the cord insertion portion 3a of the sorter 3 into the dividing portion 6a.

At this time, since the cord interval adjusting jig 6 is formed to have the same width as the sorter 3 and the dividing portion 6a is provided at a position corresponding to the cord insertion portion 3a of the sorter 3, the cord 2 is divided into the sorter 3. At the same time as being inserted into the cord insertion portion 3a of the above, it can be easily inserted into the dividing portion 6a. Further, since it is unlikely that two cords are mistakenly inserted into one dividing portion, it is possible to prevent the production of a ply material having a non-uniform cord arrangement.

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

By adjusting the width of the cord spacing adjusting jig 6 with respect to the traveling direction of the steel cord in this way, even if the width of the ply material M is changed, the cord spacing adjusting jig 6 is not replaced, and the cord array 2A Each cord 2 can be introduced substantially parallel to the die plate 4 to produce the ply material M. Further, since it is possible to manufacture a wide variety of ply materials M with one cord spacing adjusting jig 6, it is also preferable in terms of cost.

(3) Manufacture of Cord Ply The cord ply according to the present embodiment is manufactured by using the above-mentioned cord ply manufacturing apparatus. Specifically, first, after passing a long cord 2 unwound from a plurality of reels 1 through each cord insertion portion 3a of the sorter 3, a cord spacing adjusting jig 6 located close to the sorter 3 It is inserted into each of the dividing portions 6a of the above.

At this time, as described above, since the cord spacing adjusting jig 6 is formed to have the same width as the sorter 3, each cord 2 can be easily and surely inserted into each dividing portion 6a.

Next, the cord spacing 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 traveling direction of the cord 2, and then the cord spacing adjusting jig 6 is moved by a rotating means. Is rotated and tilted at an angle θ to adjust the cord spacing so that the width of the cord spacing adjusting jig 6 and the cord array 2A matches the width of the die plate 4.

Next, the cord array 2A having 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 cord array 2A is matched with the width of the die plate 4, each cord 2 can be introduced substantially in parallel toward the die plate 4, and the ply material having a uniform cord arrangement is stabilized. Can be manufactured.

2. Second Embodiment In this embodiment, the cord spacing adjusting jig is used to adjust the width of the cord spacing adjusting jig to the width of the die plate, and the cord spacing for adjusting the steel cord spacing is adjusted. It is a ply material manufacturing apparatus provided with an adjusting mechanism.

3 and 4 are views for explaining the ply material manufacturing apparatus according to the present embodiment, and FIG. 3 shows a state in which a cord spacing adjusting jig is arranged at a position close to the sorter and the cord is inserted. , FIG. 4 shows a state in which the cord spacing adjusting jig is expanded and contracted to adjust the cord spacing. In each figure, (a) is a view showing the entire device, and (b) is a partially enlarged view of the chord spacing adjusting jig as seen from the chord progression direction.

In the present embodiment, as shown in FIG. 3B, the cord spacing adjusting jig 6 is divided by a plurality of sets of links 6b connected by pins and a partition body 6c arranged in parallel (FIG. 6a). 3 (a)) is formed in an accordion manner. Then, in the present embodiment, after moving the cord spacing adjusting jig 6 to a predetermined position between the sorter 3 and the die plate 4, the cord spacing adjusting jig 6 is reduced from both sides to form an accordion type. By deforming the dividing portion formed in the above to change the width of the partition body 6c of the cord spacing adjusting jig 6, the width of the cord spacing adjusting jig 6 with respect to the traveling direction of the steel cord 2 is changed to the width of the die plate 4. The distance between the steel cords 2 can be adjusted by adjusting to.

Specifically, first, when the cord 2 is inserted into the sorter 3, as shown in FIG. 3A, the cord interval adjusting jig 6 is extended to the same width as the sorter 3, and FIG. As shown in (b), a sufficient interval for inserting the cord 2 is secured. Therefore, as in the case of the first embodiment, the cord 2 can be easily inserted into the dividing portion 6a at the same time as being inserted into the cord insertion portion 3a of the sorter 3.

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

Therefore, 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 adjusting jig to manufacture the ply material M. can do.

In each of the above-described embodiments, as the steel cord, as in the conventional case, a single-stranded steel cord having a 1 × n configuration and a layer-twisted steel cord having a k + m configuration (n is an integer of 1 to 27, k is 1 to 1). 10 integers, m is 1-8 integers, etc.), 3-layer twisted steel cord with a + b + c configuration (a is 1-3 integers, b is 1-9 integers, c is 1-13 integers, etc.) A brass-plated high-tensile cord or the like can be used.

3. 3. Effects of the present embodiment By applying the above-mentioned first embodiment and the second embodiment, the following effects can be obtained.

(1) In the present embodiment, when inserting the cord, the size of the sorter and the cord spacing adjusting jig are made the same, and the cord insertion portion of the sorter and the dividing portion of the cord spacing adjusting jig face each other. Since it is provided in such a manner, it can be inserted into the sorter and the cord spacing adjusting jig with one insertion, which is efficient and can be surely inserted one by one.

(2) Then, in the present embodiment, the width of the cord array can be easily changed to the width of the die plate without replacing the cord spacing adjusting jig, so that ply materials having different sizes can be manufactured. Even in this case, it is not necessary to reinsert the cord each time the cord interval adjusting jig is replaced.

(3) As a result of the above, when changing the ply material, the time required for replacing the cord interval adjusting jig and the time for inserting the cord through the replaced cord interval adjusting jig can be shortened, resulting in a work loss. Can contribute to the improvement of productivity.

(4) Further, since a wide variety of cord spacing adjustment jigs are not required, it is possible to reduce the manufacturing cost and storage cost of the cord spacing adjusting jig.

1. 1. Preparation of Ply Material Using a ply material manufacturing apparatus having the same configuration as that of the first embodiment described above (Example 1) and a ply material manufacturing apparatus having the same configuration as that of the second embodiment (Example 2), a cord is used. A breaker was manufactured as a ply material without replacing the interval adjustment jig.

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

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

(2) Process passability For each of the manufactured breakers, the bounce height when cut was measured, and the habit of the cord was evaluated.

3. 3. Evaluation Results (1) Improvement of Work Loss In Examples 1 and 2, it was confirmed that the work loss could be improved by 500 hours or more per year because it was not necessary to replace the cord interval adjustment jig.

(2) Process passability With regard to process passability, the same results as in Comparative Examples were obtained in both Examples 1 and 2, and even if the manufacturing was performed without replacing the cord interval adjustment jig, the process passability was obtained. It was confirmed that there was no problem in terms of quality.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments. Various modifications can be made to the above embodiments within the same and equivalent scope as the present invention.

1 reel 2 cord (steel cord)
2A Cord array 3 Sorter 3a Cord insertion part 4 Die plate 5 Cord spacing adjustment mechanism 6 Cord spacing adjustment jig 6a Partition 6b Link 6c Partition d Partition spacing M Ply material θ Cord spacing adjustment jig tilt angle

Claims (7)

A cord spacing adjusting mechanism that adjusts the cord spacing in the steel cord arrangement according to the width of the die plate in the manufacture of a ply material in which a steel cord is coated with rubber.
A cord spacing adjustment jig arranged in the vicinity of the sorter between the sorter and the die plate for arranging the steel cords unwound from the reel through the insertion portion, and
It is equipped with a rotating means for rotating the cord interval adjusting jig.
When the cord spacing adjusting jig is formed to have the same width as the width of the sorter and a dividing portion is provided at the same position as the insertion portion of the sorter, the steel cord is inserted into the insertion portion of the sorter. At the same time, it can be inserted into the dividing portion of the cord spacing adjusting jig.
The rotating means rotates the cord spacing adjusting jig that has moved to a predetermined position between the sorter and the die plate with the center in the width direction as a fulcrum, thereby causing the cord spacing with respect to the traveling direction of the steel cord. A cord spacing adjusting mechanism characterized in that the width of the adjusting jig is adjusted to the width of the die plate to adjust the spacing of the steel cords. A cord spacing adjusting mechanism that adjusts the cord spacing in the steel cord arrangement according to the width of the die plate in the manufacture of a ply material in which a steel cord is coated with rubber.
It is equipped with a cord spacing adjustment jig arranged in the vicinity of the sorter between the sorter and the die plate for arranging the steel cords unwound from the reel through the insertion portion.
When the cord spacing adjusting jig is formed to have the same width as the width of the sorter and a dividing portion is provided at the same position as the insertion portion of the sorter, the steel cord is inserted into the insertion portion of the sorter. At the same time, it can be inserted into the dividing portion of the cord spacing adjusting jig.
Furthermore, a cord spacing adjustment mechanism characterized by being configured to expand and contract in the width direction. The cord spacing adjusting jig has a dividing portion formed in an accordion type, and the width of the cord spacing adjusting jig is expanded or contracted by deformation of the dividing portion formed in the accordion type. The code interval adjusting mechanism according to claim 2, wherein the cord spacing is adjusted. A ply material manufacturing device that manufactures a ply material in which a steel cord is coated with rubber.
A sorter that inserts the steel cord unwound from the reel through the insertion part and arranges it,
The steel cord array is provided with a die plate for coating rubber.
Further, a ply material manufacturing apparatus, wherein the cord spacing adjusting mechanism according to any one of claims 1 to 3 is provided between the sorter and the die plate. The ply material manufacturing apparatus according to claim 4, wherein the ply material manufacturing apparatus is for manufacturing a breaker or a belt. A ply material manufacturing method for manufacturing a ply material by coating a steel cord with rubber using the ply material manufacturing apparatus according to claim 4 or 5.
The steel cord unwound from the reel is inserted through the insertion portion of the sorter and arranged, and the steel cord inserted through the sorter is inserted into the dividing portion of the cord spacing adjustment jig.
Next, after moving the cord spacing adjusting jig to a predetermined position between the sorter and the die plate, the cord spacing adjusting jig is rotated or the width of the cord spacing adjusting jig is reduced. , Adjust the distance of the steel cord with respect to the traveling direction to the die plate width,
Next, a ply material manufacturing method, which comprises feeding an array of steel cords having an adjusted interval between the steel cords to the die plate to cover the rubber. The ply material manufacturing method according to claim 6, wherein a breaker or a belt is manufactured.

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