JP6759793B2 - Calendar device - Google Patents

Description

The present invention relates to a calendar device for forming a plastic material such as unvulcanized rubber or uncrosslinked resin into strips.

Conventionally, a calendar device for rolling a supplied plastic material between a pair of calendar rolls to form a strip-shaped strip has been proposed (see, for example, Patent Document 1 below).

The rolled strip-shaped strip is spirally wound around a cylindrical body or the like, and is used for forming a rubber member for a tire such as a tread rubber or a sidewall rubber. On the other hand, it is necessary to change the specifications such as the cross-sectional shape, the dimensions, and the surface roughness of the strip-shaped strip according to its use.

However, in a conventional calendar device, each calendar roll can substantially form only one type of rubber strip. Therefore, in order to change the specifications of the strip to be molded, it is necessary to replace the calendar roll each time, which requires a great deal of labor.

Japanese Unexamined Patent Publication No. 2009-184152

The present invention has been devised in view of the above circumstances, and by including a calendar roll supported by a frame slidable in the axial direction and a sliding means for sliding the calendar roll, excellent workability can be achieved. The main purpose is to provide a calendar device that can be demonstrated.

The present invention is a calendar device for rolling a supplied plastic material between a pair of calendar rolls to form a strip-shaped strip, wherein the pair of calendar rolls are axially slidable and supported by a frame. It is characterized by including the rolled first calendar roll and a sliding means for sliding the first calendar roll in the axial direction.

In the calendar device of the present invention, the sliding means includes a lever swingably supported by the frame, and a connecting portion that can be detachably connected to the first calendar roll is attached to the first end portion of the lever. It is desirable that is provided.

In the calendar device of the present invention, a recess is formed on the outer peripheral surface of the first calendar roll, and it is desirable that the connecting portion includes a pin that can be inserted into the recess.

In the calendar device of the present invention, the lever is swingably provided on a support shaft provided on the frame, and the support shaft extends in a direction orthogonal to the axial direction of the first calendar roll. It is also desirable that the lever is slidable along the axial direction of the support shaft.

In the calendar device of the present invention, it is desirable to further include a fixing means for detachably fixing the first end portion of the lever to the frame when the lever is not in use.

In the calendar device of the present invention, it is desirable that the frame is made of a metal material and the fixing means is a magnet fixed to the lever.

In the calendar device of the present invention, it is desirable that the first outer peripheral surface and the second outer peripheral surface different from the first outer peripheral surface are formed side by side in the axial direction on the first calendar roll.

In the calendar device of the present invention, the pair of calendar rolls includes a first calendar roll supported by a frame so as to be slidable in the axial direction, and a sliding means for sliding the first calendar roll in the axial direction. Such a calendar device can easily slide the first calendar roll. Therefore, for example, by using a first calendar roll in which the first outer peripheral surface and the second outer peripheral surface that are different from each other are arranged in the axial direction, the first calendar roll can be slid to easily switch between the outer peripheral surfaces. As a result, the specifications of the strip can be easily changed.

It is a side view of the calendar device of this embodiment. It is a partial front view of the calendar device of FIG. It is a partially enlarged perspective view of the calendar device of this embodiment. It is a partially enlarged perspective view of the calendar device which shows one Embodiment of a sliding means. (A) and (b) are partial front views of a calendar device for explaining the operation of the sliding means. It is a partially enlarged perspective view of the calendar device explaining the operation of the slide means. (A) and (b) are partial front views of the calendar device of another embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a calendar device 1 according to an embodiment of the present invention. As shown in FIG. 1, the calendar device 1 is a device for rolling a plastic material to form a strip-shaped strip 4. Examples of the plastic material include unvulcanized rubber and resin before cross-linking. In this embodiment, as the plastic material, unvulcanized rubber used for a tire member for molding an unvulcanized tire is adopted.

In FIG. 1, the unvulcanized rubber is supplied from the extruder 2 in the direction of arrow A, for example. In the extruder 2 of the present embodiment, for example, the rubber material kneaded by the screw 12 is extruded substantially quantitatively by the gear pump 13, and the rubber preformed into a predetermined cross-sectional shape is discharged by the base portion 14. Then, the preformed rubber is supplied to the calendar device 1.

The calendar device 1 is provided on the downstream side of the extruder 2 in the A direction, which is the flow of the rubber. The calendar device 1 rolls the preformed rubber from the extruder 2 between a pair of calendar rolls 3 to form a strip 4 having a desired cross-sectional shape. In the present embodiment, the rolled strip 4 is spirally wound around a cylindrical body or the like to form a rubber member for a tire such as a tread rubber or a sidewall rubber (not shown).

FIG. 2 shows a partial front view of the calendar device 1 as viewed from the downstream side. As shown in FIG. 2, the calendar device 1 includes a frame-shaped frame 5 fixed to a floor surface, a pair of support shafts 11, and a pair of calendar rolls 3.

The frame 5 includes, for example, a pair of vertical members 5a extending in the height direction and a pair of horizontal members 5b extending horizontally between them.

The pair of support shafts 11 are rotatably supported by, for example, the frame 5. In the present embodiment, each support shaft 11 is supported by a pair of vertical members 5a so that the axial direction is horizontal, for example. The pair of support shafts 11 includes, for example, a first support shaft 11a and a second support shaft 11b arranged below the first support shaft 11a.

The pair of calendar rolls 3 includes, for example, a first calendar roll 6 and a second calendar roll 7 arranged below the first calendar roll 6.

The first calendar roll 6 is supported by, for example, the first support shaft 11a. The first calendar roll 6 rotates integrally with the first support shaft 11a, while is movably supported in the axial direction of the first support shaft 11a. The first calendar roll 6 and the first support shaft 11a of the present embodiment are fitted, for example, by a spline groove (not shown) extending in the axial direction. As a result, the first calendar roll 6 is slidably supported in the axial direction with respect to the frame 5.

The first calendar roll 6 is formed in a cylindrical shape and has a cylindrical outer peripheral surface. On the first calendar roll 6, a first outer peripheral surface 16 and a second outer peripheral surface 17 having a surface roughness different from that of the first outer peripheral surface 16 are formed side by side in the axial direction. In the present embodiment, for example, the second outer peripheral surface 16 has a surface roughness smaller than that of the first outer peripheral surface 16.

The axial width of each of the outer peripheral surfaces 16 and 17 is formed to be at least larger than the width of the strip 4 to be molded. In the present embodiment, one side (left side in FIG. 2) of the axial center position 6c of the first calendar roll 6 is configured as the first outer peripheral surface 16, and the other side (right side in FIG. 2) of the center position 6c is configured. , It is configured as a second outer peripheral surface 17.

In the present embodiment, as the first calendar roll 6 slides to one side or the other side in the axial direction, the first outer peripheral surface 16 and the second outer peripheral surface 17 are selectively selected from the first support shaft 11a. It can be located in the central part in the axial direction of.

The surface roughness of each of the outer peripheral surfaces 16 and 17 can be adjusted by a known method such as shot blasting or coating. As the coating process, for example, a method of coating a metal material or a ceramic material can be adopted.

The surface roughness Ra of the outer peripheral surfaces 16 and 17 may be appropriately determined according to the use of the strip 4 to be formed. The surface roughness Ra of the outer peripheral surfaces 16 and 17 is not particularly limited, but is preferably 0.40 to 3.50 μm, for example. In the present embodiment, the surface roughness Ra of the first outer peripheral surface 16 having a relatively large surface roughness is, for example, about 1.80 to 3.50 μm, and the second surface roughness has a relatively small surface roughness. The surface roughness Ra of the outer peripheral surface 16 is, for example, about 0.40 to 1.10 μm. However, the surface roughness Ra of the outer peripheral surfaces 16 and 17 is not limited to such a range. In addition, in this specification, "surface roughness Ra" is arithmetic mean roughness Ra defined in JISB0601-2001.

The first calendar roll 6 of the present embodiment is formed with two types of outer peripheral surfaces having surface roughness, but the present invention is not limited to such an embodiment, and the outer peripheral surface having three or more types of surface roughness is formed. May be formed side by side in the axial direction.

The first outer peripheral surface 16 and the second outer peripheral surface 17 of the present embodiment are provided with, for example, a groove 20 extending along the circumferential direction of the calendar roll 6. The groove 20 has, for example, a cross section corresponding to the cross-sectional shape of the strip 4 to be molded.

The second calendar roll 7 of the present embodiment is supported by the second support shaft 11b. The second calendar roll 7 can rotate integrally with the second support shaft 11b. Further, the second calendar roll 7 of the present embodiment is fixed to, for example, the central portion of the second support shaft 11b in the axial direction and is supported so as not to move in the axial direction.

The second calendar roll 7 has, for example, an axial width similar to that of the first outer peripheral surface 16 or the second outer peripheral surface 17. By sliding the first calendar roll 6, the second calendar roll 7 can selectively face either the first outer peripheral surface 16 or the second outer peripheral surface 17 of the first calendar roll 6.

The outer peripheral surface of the second calendar roll 7 of the present embodiment is composed of, for example, one type of surface roughness. The surface roughness of the outer peripheral surface of the second calendar roll 7 is set in the same range as the surface roughness of the outer peripheral surface of the first calendar roll 6 described above, for example.

The calendar rolls 6 and 7 are rotationally driven by, for example, an electric motor 9 (shown in FIG. 1). The electric motor 9 and one of the support shafts of the calendar rolls 6 and 7 are connected by a chain, a belt, or the like via a speed reducer (not shown). Further, the support shafts of the first calendar roll 6 and the second calendar roll 7 can be rotated in opposite directions by the gears that mesh with each other.

The preformed rubber supplied from the extruder 2 passes through a gap between the calendar rolls 6 and 7 rotating in opposite directions, whereby the strip 4 having a desired cross-sectional shape is rolled. Therefore, the surface roughness of the outer surface of the strip 4 on the first calendar roll 6 side is close to the surface roughness of the outer peripheral surface of the first calendar roll 6. The surface roughness of the outer surface of the strip 4 on the second calendar roll 7 side is close to the surface roughness of the outer peripheral surface of the second calendar roll 7.

The calendar device 1 of the present embodiment can form the strip 4 by switching between the first outer peripheral surface 16 and the second outer peripheral surface 17 having different surface roughness by sliding the first calendar roll 6 in the axial direction. is there. That is, in the case of the present embodiment, the outer surface of the strip 4 on the first calendar roll 6 side can be formed with a surface roughness close to the surface roughness of either the first outer peripheral surface 16 or the second outer peripheral surface 17. Such a calendar device 1 can form strips 4 having different surface roughness without replacing the calendar roll 6.

FIG. 3 shows a partially enlarged perspective view of the calendar device 1 of the present embodiment. In FIG. 3, a part of the frame 5 is omitted in order to make the invention easier to understand. As shown in FIG. 3, the pair of calendar rolls 3 of the present embodiment includes a sliding means 24 for sliding the first calendar roll 6 in the axial direction.

The sliding means 24 includes, for example, a support shaft 25 provided on the frame 5 and a lever 26 provided on the support shaft 25. The support shaft 25 is provided on the side surface of the lateral member 5b of the frame 5, for example, and extends in a direction orthogonal to the axial direction of the first calendar roll 6. The lever 26 is slidably supported along the axial direction of the support shaft 25. Further, the lever 26 is swingably supported with the support shaft 25 as a fulcrum.

The first end 31 of the lever 26 is provided with a connecting portion 28 that can be detachably connected to the first calendar roll 6. On the other hand, the outer peripheral surface of the first calendar roll 6 is provided with a recess 29 for connecting with the connecting portion 28. The connecting portion 28 includes, for example, a pin 30 that can be inserted into the recess 29.

FIG. 4 shows a partially enlarged perspective view of the calendar device 1 when the pin 30 of the connecting portion 28 is connected to the recess 29 of the first calendar roll 6. As shown in FIG. 4, the lever 26 is slid toward the first calendar roll 6 side along the support shaft 25, so that the pin 30 of the connecting portion 28 is inserted into the recess 29.

5A and 5B show a front view of the calendar device 1 in a state where the pin 30 is inserted into the recess 29. As shown in FIGS. 5A and 5B, in the calendar device 1 of the present embodiment, the first calendar device 1 is caused by swinging the lever 26 in a state where the connecting portion 28 is connected to the first calendar roll 6. The calendar roll 6 can be easily slid in the axial direction. Therefore, for example, as in the present embodiment, the first calendar roll 6 is formed by using the first calendar roll 6 in which the first outer peripheral surface 16 and the second outer peripheral surface 17 which are different from each other are arranged side by side in the axial direction. Each outer peripheral surface can be easily switched by sliding, and the specifications of the strip 4 can be easily changed.

However, the present invention is not limited to such an aspect, and the first calendar roll 6 may have only one type of outer peripheral surface. Even in such an embodiment, by providing the slide means 24 described above, the position of the first calendar roll 6 in the axial direction can be easily adjusted, and the maintainability of the calendar device 1 can be improved. it can.

As shown in FIGS. 3 and 4, the lever 26 of the present embodiment is bent in an L shape on the opposite side of the first calendar roll 6, for example, between the support shaft 25 and the second end portion 32. There is. Such a lever 26 helps to avoid interference with the frame 5.

It is desirable that a mounting portion 27 for mounting an extension member 36 such as a rod is provided on the second end portion 32 side of the lever 26, for example. The mounting portion 27 of the present embodiment is, for example, a hole that penetrates the lever 26. When the lever 26 is swung, an extension member 36 such as a rod is attached to the attachment portion 27, and by using this extension member as a force point, the first calendar roll 6 can be slid with a smaller force.

In the present embodiment, the fixing means 33 for detachably fixing the first end portion 31 of the lever 26 to the frame 5 when the lever 26 is not used is provided. In the present embodiment, the frame 5 is a metal material that can be attracted to a magnet such as iron, and the fixing means 33 is a magnet 34 fixed to the lever.

FIG. 6 shows a partially enlarged perspective view of the calendar device 1 when the lever 26 is fixed to the frame 5. As shown in FIG. 6, in the present embodiment, the lever 26 is swung so that the magnet 34 approaches the frame 5, and the lever 26 is slid toward the calendar roll 6 side in the axial direction of the support shaft 25. Therefore, the magnet 34 can be attracted to the frame 5. The fixing means 33 can prevent the lever 26 from swinging when not in use, and thus prevent the lever 26 from coming into contact with the calendar roll 6 during strip forming.

7 (a) and 7 (b) show a front view of the calendar device 1 of still another embodiment. As shown in FIGS. 7A and 7B, in this embodiment, the first calendar roll 6 slidably supported in the axial direction with respect to the frame 5 and the first calendar roll 6 are independent of each other. A second calendar roll 7 that is slidably supported in the axial direction with respect to the frame 5 is included.

The second calendar roll 7 has, for example, an axial width similar to that of the first calendar roll 6. On the second calendar roll 7, a third outer peripheral surface 18 and a fourth outer peripheral surface 19 having a surface roughness different from that of the third outer peripheral surface 18 are formed side by side in the axial direction. The axial width of the outer peripheral surfaces 18 and 19 is, for example, about 0.4 to 0.6 times the axial width of the second calendar roll 7. In the present embodiment, one side (left side in FIG. 7) of the axial center position 7c of the second calendar roll 7 is configured as the third outer peripheral surface 18, and the other side (right side in FIG. 7) of the center position 7c is configured. , The fourth outer peripheral surface 19 is configured.

As the second calendar roll 7 slides to one side or the other side in the axial direction, the third outer peripheral surface 18 and the fourth outer peripheral surface 19 are respectively located at the central portion in the axial direction of the second support shaft 11b. be able to. As a result, the calendar device 1 of the present embodiment can form the strip 4 by switching between the third outer peripheral surface 18 and the fourth outer peripheral surface 19 by sliding the second calendar roll 7 in the axial direction.

That is, in this embodiment, by sliding the first calendar roll 6 and the second calendar roll 7 in the axial direction, the first outer peripheral surface 16 and the second outer peripheral surface 17 of the first calendar roll 6 are each second. It can face the third outer peripheral surface 18 and the fourth outer peripheral surface 19 of the calendar roll 7.

Therefore, in this embodiment, the surface roughness of the outer surface of the strip 4 on the second calendar roll 7 side can be changed without replacing the calendar rolls 6 and 7, and thus more types of strips 4 are formed. be able to.

In the present embodiment, a first sliding means 24 for sliding the first calendar roll 6 and a second sliding means 35 for sliding the second calendar roll 7 are further provided. The first slide means 24 and the second slide means 35 include the same configuration as the slide means described above.

In the present embodiment, since each calendar roll is provided with a sliding means, it is possible to easily switch each outer peripheral surface.

Although one embodiment of the calendar device of the present invention has been described in detail above, the present invention is not limited to the specific embodiment described above, and may be modified into various embodiments.

3 Pair of calendar rolls 4 Strips 6 1st calendar roll 24 Sliding means

Claims (7)

A calendar device for rolling the supplied plastic material between a pair of calendar rolls to form strips.
The pair of calendar rolls includes a first calendar roll supported by a frame so as to be slidable in the axial direction.
Look including a slide means for sliding the first calender roll in the axial direction,
The sliding means is a calendar device including a lever swingably supported by the frame .
Before SL to the first end of the lever, the calendar device according to claim 1, wherein the connecting portion capable removably connected to the first calender roll is provided.
A recess is formed on the outer peripheral surface of the first calendar roll.
The calendar device according to claim 2, wherein the connecting portion includes a pin that can be inserted into the recess. The lever is swingably provided on a support shaft provided on the frame.
The support shaft extends in a direction orthogonal to the axial direction of the first calendar roll.
The calendar device according to any one of claims 1 to 3, wherein the lever is slidable along the axial direction of the support shaft.
The calendar device according to any one of claims 1 to 4, further comprising a fixing means for detachably fixing the first end portion of the lever to the frame when the lever is not used.
The calendar device according to claim 5, wherein the frame is made of a metal material, and the fixing means is a magnet fixed to the lever. A calendar device for rolling the supplied plastic material between a pair of calendar rolls to form strips.
The pair of calendar rolls includes a first calendar roll supported by a frame so as to be slidable in the axial direction.
Includes a sliding means for sliding the first calendar roll in the axial direction.
Wherein the first calender roll, the first outer peripheral surface, the first different second outer peripheral surface and Luca render device are formed side by side in the axial direction from the outer peripheral surface.

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