JP2003001721A - Method and apparatus for applying adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for applying an adhesive which prevents the scattering of the adhesive into areas other than a cut surface, and to improve problems such as environmental pollution when the adhesive is applied on the cut surface of a belt-shaped rubber plate. SOLUTION: The apparatus for applying the adhesive on the cut surface 2a of the belt-shaped rubber plate 2 cut in a prescribed length has a felt roller 15 having a roller peripheral part 15b to be impregnated with the adhesive, a roller moving means for moving the roller 15 along the cut surface 2a, and an adhesive supply apparatus 41 for supplying the adhesive to the roller peripheral part 15b. By moving the roller peripheral part 15b impregnated with the adhesive along the cut surface 2a while being pressed to the cut surface 2a, the adhesive is applied on the cut surface 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive application device and an adhesive application method for applying an adhesive to a cut surface of a strip-shaped rubber plate cut into a predetermined length.

[0002]

2. Description of the Related Art As an example of such a belt-shaped rubber plate, there is a belt-shaped rubber plate which constitutes a tread portion of a tire. This strip-shaped rubber plate is continuously extruded into a strip shape from an extrusion molding machine and then cut into a predetermined length by a cutter.
The cut strip-shaped rubber plate is wound around a drum in a post process to join the cut surfaces together. for that reason,
An adhesive is applied to each cut surface. Conventionally, the method for applying the adhesive is as follows.

That is, the extruded band-shaped rubber plate is carried on a belt conveyor. And
When applying the adhesive, the belt conveyor carrying the belt-shaped rubber plate was temporarily stopped and the pressurized adhesive was spray-applied to the cut surface. In some cases, the adhesive may be spray-applied while the belt conveyor is traveling without being temporarily stopped. Regarding the range in which the adhesive is applied, it is usually applied over the entire cut surface.

[0004]

However, it is difficult to control the coating range by the spray coating method. As described above, when it is necessary to apply the adhesive to the entire or almost the entire cut surface of the strip-shaped rubber plate, the adhesive is likely to be scattered to the area other than the cut surface. As a result, the adhesive may adhere to a portion other than the cut surface of the belt-shaped rubber plate, which causes quality deterioration.

Further, since the adhesive may scatter on the portion other than the cut surface of the strip-shaped rubber plate, there is a problem that the surrounding environmental conditions are deteriorated. Therefore, there is a problem that a booth for surrounding the area where the adhesive is applied is required and an exhaust device must be provided. The present invention has been made in view of the above circumstances, and its object is to apply an adhesive to the cut surface of the belt-shaped rubber plate,
It is an object of the present invention to provide an adhesive applying device and an adhesive applying method capable of preventing the adhesive from scattering to areas other than the cut surface and improving problems such as environmental degradation.

In order to solve the above problems, an adhesive applying device according to the present invention is an adhesive applying device for applying an adhesive to a cut surface of a strip-shaped rubber plate cut into a predetermined length. And a roller having a roller outer peripheral portion impregnated with an adhesive, a roller moving means for moving the roller along the cutting surface, and an adhesive supplying means for supplying an adhesive to the roller outer peripheral portion. It is characterized in that the outer peripheral portion of the roller impregnated with the adhesive is moved along the cutting surface while being pressed against the cutting surface, so that the adhesive is applied to the cutting surface. It is a thing. The operation and effect of the adhesive application device having this configuration are as follows. First, a roller having a roller outer peripheral portion is provided, and this roller is used for applying an adhesive. It is provided with an adhesive supply means and supplies the adhesive to the outer peripheral portion of the roller. As a result, the outer peripheral portion of the roller is impregnated with the adhesive. The roller outer peripheral portion is moved along the cut surface while being pressed against the cut surface. As a result, the adhesive with which the outer peripheral portion of the roller is impregnated is applied to the cut surface.

Since the adhesive is applied while being impregnated on the outer peripheral portion of the roller, the adhesive does not scatter to the area other than the cut surface. Further, since the outer peripheral portion of the roller is moved along the cut surface in a state where the outer peripheral portion of the roller is pressed against the cut surface, the adhesive can be applied to the entire cut surface or almost the entire cut surface. As a result, when applying the adhesive to the cut surface of the strip rubber plate,
It is possible to provide an adhesive agent applying device capable of preventing the adhesive agent from scattering to an area other than the cut surface and improving problems such as environmental degradation.

As a preferred embodiment of the present invention, the adhesive supply means is configured to drop a predetermined amount of adhesive onto a predetermined portion of the outer peripheral portion of the roller, and the adhesive is applied to the entire outer peripheral portion of the roller. Provide a plate member to familiarize yourself with
By rotating the outer peripheral portion of the roller while pressing it against the surface of the plate member, the adhesive can be made to adapt. The adhesive is supplied to the outer peripheral portion of the roller by dropping a predetermined amount of the adhesive onto the outer peripheral portion of the roller by the adhesive supply means. in this case,
The dropping of the adhesive is performed on a certain portion of the outer peripheral portion of the roller. Next, the outer peripheral portion of the roller is rotationally moved while being pressed against the surface of the plate member. As a result, the adhesive can be applied to the entire outer peripheral portion of the roller. As a result, the adhesive can be uniformly applied to the cut surface.

As another preferred embodiment of the present invention, the plate member is formed of a metal plate coated with Teflon. By performing Teflon coating on the metal plate, the adhesive does not adhere to the metal plate even when the outer peripheral portion of the roller on which the adhesive has been dropped is pressed and moved. As a result, the frequency of maintenance of the metal plate can be reduced and the life of the metal plate can be extended.

As still another preferred embodiment of the present invention,
The pressing force of the outer peripheral portion of the roller against the cut surface can be adjusted. Thereby, an appropriate pressing force can be applied.

An adhesive applying method according to the present invention is an adhesive applying method for applying an adhesive to a cut surface of a belt-shaped rubber plate by using the adhesive applying apparatus described above, and is a roller of a roller. Applying an adhesive to the cut surface by supplying the adhesive to the outer circumference and moving the roller outer circumference impregnated with the adhesive along the cut surface while pressing it against the cut surface. And a step of performing. The operation and effect of this configuration are as described above.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of an adhesive coating device according to the present invention will be described with reference to the drawings. First, a specific example of a belt-shaped rubber plate applicable to the present invention will be described with reference to FIG. This belt-shaped rubber plate is used to form a tread portion of a pneumatic tire. First, the belt-shaped rubber plate 1 is continuously molded by a known extrusion device. The continuously molded strip-shaped rubber plate 1 is transported from the left to the right in FIG. 1 by a transport mechanism (not shown). This band-shaped rubber plate 1 is cut into a band-shaped rubber plate 2 having a predetermined length by using a known cutting device. The belt-shaped rubber plate 2 has a predetermined length along the carrying direction and a predetermined width dimension in the direction perpendicular to the paper surface. Further, it has two cutting surfaces 2a in the front-rear direction by being cut by the cutting device. An adhesive application device is provided to apply an adhesive to each of the two cut surfaces 2a. That is,
The cut surface 2a is also an adhesive surface.

When the adhesive is applied to the cut surfaces 2a, the cut surfaces 2a are wrapped around the drum 3 and the cut surfaces 2a are joined together. After that, a pneumatic tire as a product can be manufactured by performing a predetermined treatment process.

As shown in FIG. 1, the cut surface 2a is not perpendicular to the surface of the rubber strip 2 but is rather inclined. This is to increase the adhesive force by taking as large an adhesive area as possible. Also, the belt-shaped rubber plate 2
Since it is necessary to apply the adhesive to the cut surfaces 2a at two locations before and after, as shown in FIG. 1, adhesive application devices are provided at two locations.

<Structure of Adhesive Coating Device> Next, the structure of the adhesive coating device will be described. FIG. 2 is a side view of the adhesive applying device showing a state in which the adhesive is being applied.
FIG. 4 is a plan view of the adhesive applying device, FIG. 4 is a partially enlarged view of a main portion of FIG. 2, and FIG. 5 is a side view of the adhesive applying device showing a state in which the adhesive is dropped on the felt roller. FIG. 6 is an enlarged view showing details of the felt roller, and FIG. 7 is a perspective view of the adhesive application device.

In FIG. 2, the cut strip-shaped rubber plate 2 is mounted and conveyed on the belt conveyor 10 in the direction of arrow A. One cut surface 2a of the strip rubber plate 2 is shown.

The adhesive applicator comprises frame members 11, 1
2 and 13 are provided to instruct each mechanism. Also,
With respect to the frame member 12 extending in the front-back direction, the front-back direction
A slide frame 14 movable in the direction of arrow D is provided. Further, a drive mechanism (not shown) for making the slide frame 14 movable is provided.

A felt roller 15 for applying an adhesive is provided on the cut surface 2a, a support shaft 16 for rotatably supporting the felt roller 15 and a holder 17 to which one end of the support shaft 16 is attached. ing. On the other hand, the cylinder 18 is attached to the mounting plate 19,
A cylinder shaft 20 is attached to the cylinder 18 so as to be retractable in the direction of arrow B. A bracket 21 is provided at the tip of the cylinder shaft 20. The bracket 21 is provided with a rotation support shaft 22, and the felt roller 15 and the support shaft 16 are attached in a rotatable state around the rotation support shaft 22. A biasing spring 23 is provided to bias the felt roller 15 and the support shaft 16 clockwise with respect to the rotation support shaft 22. As a result, the felt roller 15 is pressed against the cut surface 2a. The pressing force of the biasing spring 23 can be adjusted by the bolt / nut mechanism 24. Further, although the felt roller 15 is biased clockwise as described above, it is structured so as not to rotate beyond a predetermined position by a stopper (not shown).

As shown in FIG. 2, the cylinder 18 is mounted by the moving bracket 25 and the mounting plate 19 in a tilted state, and as a result, the support shaft 16 and the felt roller 15 are also mounted at a tilted angle θ. become. Since the cut surface 2a of the belt-shaped rubber plate 2 is originally an inclined surface, the outer peripheral surface of the felt roller 15 and the cut surface 2a can be aligned by tilting the cylinder 18. As a result, the adhesive can be applied uniformly to the cut surface 2a.

The mounting plate 19 is integrally fixed to a moving bracket 25 (corresponding to a roller moving means), and the moving bracket 25 is in a direction perpendicular to the plane of FIG. It is slidable in the direction of arrow C in 3).

Next, the structure of the felt roller 15 will be described with reference to FIG. The support shaft 16 is formed with a small diameter portion 16a having a reduced diameter at its tip. This small diameter part 16
The first collar 26 and the second collar 27 are fitted in a. The felt roller 15 includes a roller main body 15a and a roller outer peripheral portion 15b provided on the outer periphery of the roller main body 15a. The roller main body portion 15a is sandwiched by the first collar 26 and the second collar 27, and is joined by a nut 28 so as not to come off from the small diameter portion 16a. The roller outer peripheral portion 15b is formed of felt and is impregnated with an adhesive. The roller outer peripheral portion 15b may be made of any material so long as it is impregnated with an adhesive, and is not limited to felt. The roller 15 is attached to the small diameter portion 16a of the support shaft 16 so as to be freely rotatable.

Next, a mechanism for supplying the adhesive to the roller 15 will be described with reference to FIGS. 3, 5 and 6. Figure 5
As shown in, the adhesive supply device 41 is attached to the stand 40. Discharge unit 41a of the adhesive supply device 41
Is directed downward and a predetermined amount of adhesive can be dripped downward.

Below the adhesive supply device 41, the receiving plate 4 is provided.
2 (corresponding to a plate member) and a holder plate 43 are provided. The holder plate 43 is a stand 40
Is attached to the lower portion 40a of the. The receiving plate 42 is fastened to the holder plate 43 with bolts 44. As shown in FIG. 3, the receiving plate 42 has a predetermined area, and the roller outer peripheral portion 1 of the roller 15 is placed on the receiving plate 42.
5b can be contacted and moved. The adhesive can be spread over the entire area of the roller outer peripheral portion 15b by dropping the adhesive on a portion of the roller outer peripheral portion 15b and then moving the roller outer peripheral portion 15b in contact with the receiving plate 42. The receiving plate 42 is preferably an iron plate having a surface coated with Teflon. By using such a material, the adhesive is applied to the receiving plate 4
Since it becomes difficult to adhere to the surface of the receiving plate 42, the number of times of maintenance of the receiving plate 42 can be reduced and the life of the receiving plate 42 can be extended.

Further, as can be seen from the plan view of FIG.
The mechanism for supplying the adhesive is provided outside the region where the belt-shaped rubber plate is conveyed. As a result, the belt-shaped rubber plate can be appropriately conveyed.

<Operation> Next, the operation of applying the adhesive according to the present embodiment will be described. First, the procedure for supplying the adhesive to the felt roller 15 will be described. First, the slide frame 14 and the moving bracket 25 are driven so that the felt roller 15 is located immediately below the adhesive agent supply device 41. In this case, the cylinder shaft 20 of the cylinder 18 is retracted. Felt roller 1
The roller outer peripheral portion 15 b of the felt roller 15 is pressed against the surface of the receiving plate 42 by the urging force of the urging spring 23 in a state in which 5 is positioned immediately below the adhesive agent supply device 41.

Next, the ejection portion 41a of the adhesive agent supply device 41
A predetermined amount of adhesive is dropped onto the roller outer peripheral portion 15b.
The adhesive is dropped only on a predetermined portion of the roller outer peripheral portion 15b, not on the entire area. Therefore, the moving bracket 2
5 along the slide frame 14 in the direction of arrow C (Fig. 3)
Move to. As a result, the felt roller 15 is rotated while being pressed against the surface of the receiving plate 42. As a result, the entire area of the roller outer peripheral portion 15b can be soaked in and impregnated with the adhesive.

Next, an adhesive is applied to the cut surface 2a using the felt roller 15 in which the roller outer peripheral portion 15b is impregnated with the adhesive. The belt-shaped rubber plate that has been conveyed is stopped at a predetermined position (see FIG. 2). The moving bracket 25 is moved in the direction of arrow C (see FIG. 3), and the felt roller 15 is moved to a predetermined position (one end in the width direction) of the cut surface 2a. At this position, the cylinder 18 is driven to press the roller outer peripheral portion 15b of the felt roller 15 against the cut surface 2a. Next, by moving the moving bracket 25 in the direction of arrow C, the felt roller 15 rotates and moves along the cut surface 2a. As a result, the adhesive with which the roller outer peripheral portion 15b is impregnated can be applied to the cut surface 2a.

The belt-shaped rubber plate 2 has two cut surfaces 2
Although a is formed, the adhesive is similarly applied to the other cut surface 2a. Therefore, another adhesive coating device shown in FIG. 2 and the like is provided (not shown). Further, since the belt-shaped rubber plate 2 has various lengths, it is necessary to be able to cope with the change in length. As described above, the slide frame 14 can be moved along the frame member 12 in the direction of arrow D (see FIG. 2), and the felt roller 15 can be moved along the direction of arrow D (see FIG. 2). (See the imaginary line). Thereby, it is possible to easily cope with the difference in the length of the strip-shaped rubber plate 2.

<Other Embodiments> The belt-shaped rubber plate is not limited to the one forming the tread portion, and the present invention can be applied to the case of forming another portion (product).

[Brief description of drawings]

FIG. 1 is a diagram illustrating a specific example of a belt-shaped rubber plate.

FIG. 2 is a side view of the adhesive application device showing a state in which adhesive is being applied.

FIG. 3 is a plan view of the adhesive application device.

FIG. 4 is a partially enlarged view showing a main part of FIG.

FIG. 5 is a side view of the adhesive application device showing a state in which the adhesive is dropped onto the felt roller.

FIG. 6 is an enlarged view showing details of the felt roller.

FIG. 7 is a perspective view of the adhesive applying device.

[Explanation of symbols]

2 strip rubber plate 2a cut surface 15 felt rollers 15b Roller outer periphery 41 Adhesive Supply Device (Adhesive Supply Means) 41a discharge part 42 Support plate

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B05D 3/00 B05D 3/00 B 7/00 7/00 N 7/04 7/04 7/24 301 7 / 24 301P F term (reference) 4D075 AC21 AC35 AC97 BB05Y BB14Y CA47 DA03 DA06 DB35 DC13 EA35 4F040 AA02 AA13 AB01 BA13 BA17 CB02 CB21 CB40 DA02 DA13 DA14 4F042 AA02 A210900 0008 VL11 VP11 VP20

Claims (5)

[Claims] 1. An adhesive application device for applying an adhesive to a cut surface of a strip-shaped rubber plate cut into a predetermined length, the roller having a roller outer peripheral portion impregnated with the adhesive, and the roller. A roller moving means for moving the roller along the cut surface, and an adhesive supply means for supplying an adhesive to the roller outer peripheral portion, and the roller outer peripheral portion impregnated with the adhesive with respect to the cut surface. An adhesive application device characterized in that an adhesive is applied to the cut surface by moving along the cut surface while pressing. 2. The plate member for dripping a predetermined amount of the adhesive onto a predetermined portion of the outer peripheral portion of the roller, and the plate member for accommodating the adhesive to the entire outer peripheral portion of the roller. The adhesive application device according to claim 1, wherein the adhesive is adapted to be adapted by rotating the outer peripheral portion of the roller while pressing the outer peripheral portion of the roller against the surface of the plate member. 3. The adhesive application device according to claim 2, wherein the plate member is formed of a metal plate coated with Teflon (registered trademark). 4. The adhesive application device according to claim 1, wherein the pressing force of the outer peripheral portion of the roller against the cut surface is adjustable. 5. An adhesive application method for applying an adhesive to a cut surface of a strip-shaped rubber plate cut into a predetermined length, the method comprising: supplying the adhesive to a roller outer peripheral portion of a roller; Applying an adhesive to the cut surface by moving the outer peripheral portion of the roller impregnated with the agent along the cut surface while pressing it against the cut surface. Method.