KR19980041696A - Production method and apparatus of sealing tape and sealing tape and repairing method by sealing tape - Google Patents

Abstract

The tape does not loosen and do not separate even when it is bent and attached to the metal joint and joined. Tapes made of unvulcanized rubber-based materials and vulcanization accelerators, antioxidants, pigments and unvulcanized materials containing pigments and extenders have an upper surface and a lower surface and are measured in a direction perpendicular to the lower surface or flat bottom surface (1). It is formed into an elongate shape with a predetermined thickness. The upper surface forms a circular curved surface 2. Since the tape is not vulcanized, it can be bent freely when attached to the metal connection. After attaching the tape to the metal connecting portion, paint is applied to the tape after the heat treatment in which the tape is heated and vulcanized.

Description

Production method and apparatus of sealing tape and sealing tape and repairing method by sealing tape

FIELD OF THE INVENTION The present invention relates to sealing tapes and apparatus and methods for producing them, and to repairing methods with sealing tapes, in particular covering exposed metal surfaces of automobile bodies, connections between metal plates, connection steps and similar stepped surfaces. It is about sealing tape to wrap.

In the manufacture of automobiles, a sealing agent is attached to the connection steps and connections of the automobile body such as the hemming portion of the hood and the door of the automobile body and the body panel connection to prevent water and dust from entering the automobile body. . In particular, as shown in FIG. 15, in the case where the inner metal plate B is inserted into and joined to the bent portion C of the outer metal plate A provided with the bent portion C at the end, it is perpendicular to the plane of the drawing. The extending connection step D is covered by a sealing agent E extruded from the nozzle of the tube, and this sealing connection step D extends in the vertical direction in the drawing.

Attaching the sealing agent E to the vehicle body is performed by an industrial robot during the manufacture of the vehicle or vehicle. As a result, the moving distance of the nozzle and the amount of the sealing agent E extruded from the nozzle can be controlled very accurately, so that the sealing agent E can be attached to the vehicle body in a constant cross-sectional shape as shown in FIG. have. After the sealing agent E is attached to the vehicle body, paint coating is performed.

When the connection of the vehicle body panel is deformed by a collision applied to the vehicle, it is necessary to repair this deformed connection to return the connection to its original appearance.

During such repair and painting of the car body, the connection part of the car body panel is repaired in its original form, and then, for example, the operator manually inserts the nozzle of the tube made of metal and filled with the sealing agent (E) by the operator by hand. The sealing agent (E) is attached to the connecting portion in a contact manner, and the operation of attaching the sealing agent (E) to the connecting portion while the worker extrudes the sealing agent (E) from the nozzle of the tube by hand and moves along the connecting portion is performed. do.

In this manual operation, in moving the tube while constantly extruding the sealing agent (E) of the tube along the connection, to maintain a constant amount of the sealing agent (E) is extruded even if the operator pays full attention to the operation Is difficult. In other words, in most cases, the operator cannot perform the joining precisely, and the finishing surface of the sealing agent E so attached to the connecting portion is not uniform. Due to this error, the connection of the main body panel thus repaired is not the same as the connection of the main body panel of the new vehicle. A cross section in the form of a connection of a new vehicle is shown in FIG. 15.

Prior to the present invention, the inventor of the present application has already proposed a conventional sealing tape 10. The sealing tape 10 allows the user to seal the connection of the vehicle body panel in a very easy manner, and the connection thus sealed by the tape 10 has excellent finish marks.

As shown in FIG. 14, the conventional sealing tape 10 is made of a vulcanized rubber base material that is relatively thin strip-shaped with a stepped surface, which elastically retains its original shape. In use, such a conventional sealing tape 10 is adhesively attached to the connection step of the metal plate (disclosed in Japanese Utility Model Registration No. 3,004,875).

For example, as shown in FIG. 13, an inner side or a second side which is inserted into and connected to the bent portion C of the first metal plate A provided with the bent portion C at the outer or first metal plate A and its end. A conventional sealing tape 10 is attached to the connection step D disposed between the metal plates B, and the sealing tape 10 is adhesively attached to the respective metal plates A and B. And a first bottom face 11 disposed on the opposite side of the curved portion 14 of the tape 10 and a second bottom face 12 disposed on the opposite side of the flange edge portion 15 of the tape 10. .

As a result, the first bottom face 11 and the second bottom face 12 of the conventional sealing tape 10 are firmly fixed to the connection step portion D disposed between the metal plates A and B, so that the connection step portion is It can be sufficiently sealed.

However, as shown, for example, in Fig. 12, when the conventional sealing tape 10 is used for the connection step of the metal plate inside the automobile rear door (the decorative inner panel is omitted in Fig. 12), the sealing tape ( It is necessary to bend the sealing tape 10 at a substantially right angle in such a way that 10) extends along the corner portion G of the door in order to fix the corner portion G.

In this case, the sealing tape 10 is often loosened or separated from the corner portion G of the door, so the door must be repaired to improve the quality of the surface finish. In order to improve the finish quality of this surface, it was necessary to manually attach the sealing agent E to the corner portion G of the door as in the conventional attachment method.

The aforementioned looseness and separation of the sealing tape 10 occurs due to the elasticity of the tape. In other words, since the sealing tape 10 is made of a vulcanized rubber base material and has a resilient strip or elongate shape, such looseness and separation occur at the corner portion G of the door. Generally, the rubber base material is vulcanized to a fixed form of a given rubber product since the unvulcanized rubber base material may change in shape under pressure. As a result, these unvulcanized rubber-based materials are inadequate for the purpose of sealing tapes that must remain in shape for a long time in use.

The present invention is based on the fact that paint coating at the time of automobile maintenance is accompanied by heat treatment. As a result, it is an object of the present invention to provide a sealing tape and a method and apparatus for producing the same, and a repairing method with a sealing tape which can be freely changed in shape when it is not vulcanized and needs to be bent. The heat treatment which vulcanizes this sealing tape is used.

According to a first embodiment of the present invention, an object of the present invention is to be made of a sealing tape material containing an unvulcanized rubber base material and a vulcanization accelerator, and having a predetermined thickness measured in a direction perpendicular to the bottom face. It is achieved by providing an elongated sealing tape with an excitation.

Since the sealing tape of the present invention is not vulcanized, it can be freely deformed. As a result, even when the sealing tape of the present invention is bent in a predetermined form, the tape does not loosen or separate from the attached portion.

According to a second embodiment of the present invention, an object of the present invention is achieved in the sealing tape according to the first embodiment of the present invention, by adding an antioxidant to a vulcanization accelerator together with an unvulcanized rubber base material.

The weather resistance of the sealing tape of this invention can be improved by antioxidant.

The unvulcanized state of the tape allows the adhesive to be easily attached to the bottom of the sealing tape, so that the adhesive may be bonded to the bottom of the sealing tape.

According to a third embodiment of the present invention, an object of the present invention is, in the first embodiment of the present invention, a stepped connection or stepped surface of a metal plate, which is a stepped surface in which the sealing tape can come into close or sealing contact. This is accomplished by providing a bottom.

According to a fourth embodiment of the present invention, an object of the present invention is to provide a sealing tape material preparation step for preparing a sealing tape material containing an unvulcanized rubber base material and a vulcanization accelerator,

A sealing tape forming step in which the sealing tape material is formed into a generally rectangular sheet while maintaining unvulcanized conditions;

An adhesive attaching step for attaching the adhesive sheet coated by the adhesive to the bottom of the generally rectangular sheet, and

The upper surface of the sheet is generally pressed by a rolled cutter provided with at least one pair of circular blades axially spaced from each other by an annular recess formed in the outer periphery of the rolled cutter while moving the square sheet, It is achieved by a sealing tape production method comprising a rectangular sheet cutting step for cutting into at least one or more sealing tapes of elongate shape having a predetermined thickness measured in a direction perpendicular to this bottom surface of the sealing tape.

In the sealing tape production method, the cross section of the annular recess of the rolled cutter may be in the form of a circular curved surface suitable for use.

In addition, in the sealing tape production method, an antioxidant may be added to the sealing tape material preparation step. Antioxidants can improve the weather resistance of unvulcanized sealing tape.

According to a fifth embodiment of the present invention, the above object of the present invention is to be made of a sealing tape material containing a vulcanized rubber base material and a vulcanization accelerator, in order to bond the sealing tape to a connection portion, Attaching an elongated sealing tape having a predetermined thickness measured in the vertical direction while bending at a connection portion between a pair of metal surfaces or metal plates,

Painting paint on the upper surface of the sealing tape bent and bonded to the connecting portion, wherein the bent and bonded sealing tape is vulcanized and heat-treated to form a final rubber product having a fixed elastic shape by heating the paint. This is achieved by providing a method of repairing with a sealing tape comprising a paint coating step in which paint is applied at the time.

In this repairing method with a sealing tape, the bottom surface of the sealing tape is joined to the connection portion of the metal surface, which is performed after the coating process accompanied by heat treatment for vulcanizing the sealing tape. As a result, the heat-treated sealing tape is vulcanized to form a final elastic product of fixed elastic form that is bent and bonded, and the final form of the vulcanized sealing tape can be elastically maintained.

1 is a perspective view of one embodiment of a sealing tape of the present invention,

FIG. 2 is a schematic diagram of one embodiment of the apparatus of the present invention for implementing one embodiment of the method of the present invention for producing the sealing tape shown in FIG.

3 is a perspective view of a rolled cutter for cutting a rectangular sheet in the method of the present invention for producing the sealing tape shown in FIG.

4 is a side view of a rolled cutter used in the method of the present invention shown in FIG.

FIG. 5 is a cross-sectional view of the sealing tape shown in FIG. 1 showing the sealing tape forming process performed in the cutting step of a generally rectangular sheet of the method of the present invention shown in FIG.

6 is a perspective view of a winding process for winding a generally rectangular sheet into a rolled sheet,

7 is a perspective view of another embodiment of the apparatus of the present invention for implementing the method of the present invention to produce the sealing tape shown in FIG.

8 is a plan view of a rolled cutter used in the present invention,

9 is a plan view of the guide roll used in the present invention,

10 (a) is a schematic drawing showing generally rectangular sheet cutting steps performed in the method of the present invention;

10 (b) is a schematic diagram showing a longitudinal trimming step of vertically trimming opposite corner portions of the upper surface of the cross section of the sealing tape by roll-type grinding means;

11 is a perspective view of another embodiment of a sealing tape of the present invention;

12 is a perspective view of the inside of the door, showing a sealing tape attached to the connecting step of the metal plate of the door;

13 is a sectional view of a connecting step of a metal plate with a sealing tape attached thereto;

14 is a perspective view of a conventional sealing tape,

Fig. 15 is a sectional view of a connecting step of a metal plate with a sealing tape attached thereto.

(Explanation of symbols for the main parts of the drawing)

1: Bottom

2: curved surface

3: adhesive sheet

4: protective tape

10: sealing tape

201: square sheet

401: Roll Type Cutter

402: Blade

403: recessed portion

The present invention is now described in detail with reference to the accompanying drawings.

1 is a perspective view of a first embodiment of a sealing tape 10 of the present invention. The sealing tape 10 is made of a sealing tape material containing an unvulcanized rubber base material, a vulcanization accelerator, an antioxidant, a pigment and an extender. The sealing tape 10 is an elongate type provided with an upper surface and a lower surface. The lower surface forms a flat bottom surface 1, and the upper surface forms a circular curved surface 2. The sealing tape 10 has a predetermined thickness measured in the direction perpendicular to the bottom face 1 and is not vulcanized.

The adhesive layer 3 attached to the bottom surface 1 of the sealing tape 10 is covered by a protective tape 4 which holds the sealing tape 10 in an unvulcanized state or condition, thereby providing an adhesive layer ( 3) may be firmly bonded to the bottom face 1 of the sealing tape 10. At this time, the adhesive layer 3 is easily attached to the bottom face 1 by the uneven surface of the bottom face 1 of the sealing tape 10 in an unvulcanized state or condition. As a result, in the present invention, the cumbersome work of attaching the double-sided adhesive tape to the bottom face 1 of the sealing tape 10 can be omitted, thereby reducing the manufacturing cost. However, it is also possible in the present invention to use such a conventional double-sided adhesive tape in place of the adhesive layer 3 described above.

The sealing tape 10 can be wound on a roll for storage convenience by means of a protective tape 4 covering the adhesive layer 3.

On the other hand, vulcanization accelerators, such as sulfur oxides, for example, vulcanize unvulcanized rubber base materials under the influence of heat generated during heat treatment. Due to this vulcanized rubber base material, the sealing tape becomes the final rubber product in fixed elastic form. The present invention is characterized in that such vulcanization treatment of the sealing tape 10 is carried out at the time of heat treatment accompanied by a painting step. The sealing tape 10 is in a state or condition which is not vulcanized before being attached to the metal surface.

Antioxidants such as, for example, polybutene are added to the sealing tape material to improve the weather resistance of the sealing tape.

Pigments such as titanium oxide, for example, are used to paint the sealing tape 10 in a predetermined color.

Extenders such as, for example, calcium carbonate are used to inflate the sealing tape. In addition, the extender increases the strength of the sealing tape material.

The sealing tape 10 of this invention is used to cover the connection part of a metal plate. In particular, in the connection formed between adjacent edge portions of the metal plate, the sealing tape 10 is bonded to one of the adjacent edge portions of the metal plate extending along the edge portion, whereby water and dust are joined to the adjacent edge portions of the metal plate. It prevents the inflow to the connection through the other one of the.

On the other hand, as the sealing tape 10 of the present invention is in the unvulcanized state or condition described above, due to this characteristic of the sealing tape, it is used in the production of the conventional vulcanized sealing tape shown in FIG. It is not possible to produce the sealing tape 10 in the same way as the described method. In other words, in the conventional method for producing a conventional vulcanized sealing tape, a vulcanized rubber base material which has already been heated to a predetermined high temperature and thus can be molded, is formed from a conventional vulcanized elongated sealing tape. The cylinder is filled with a bottom opening having the same cross-sectional shape, which is then extracted from the cylinder by a piston in the elongate form of the final vulcanized rubber product, ie a conventional sealing tape.

However, when the unvulcanized rubber base material is extracted and used from the cylinder by the conventional method described above, the unvulcanized rubber base material cannot have a fixed form as formed by the bottom opening of the cylinder, and thus It is not possible to produce elongate unvulcanized sealing tape.

In contrast to the conventional method described above, the following process uses a number of process steps to produce an elongate unvulcanized sealing tape as shown in FIG.

A sealing tape material preparation step (100) for preparing a sealing tape material incorporating an antioxidant, a pigment and an extender together with an unvulcanized rubber base material and a vulcanization accelerator thereby;

A sealing tape forming step 200 in which the sealing tape material is formed of a generally rectangular sheet 201 while maintaining the unvulcanized state;

An adhesive attaching step 300 for attaching the adhesive to the bottom of the generally rectangular sheet 201 through the adhesive sheet 301; And

At least one pair of circular blades 402 axially spaced apart from each other by an annular or concave portion 403 formed on the circumference of the roll-shaped cutter 401 generally moves the rectangular sheet 201. The generally rectangular sheet 201 attached with the adhesive or adhesive sheet 301 on the back side, pressed against the provided roll-shaped cutter 401, was measured in the direction perpendicular to the bottom face 1 and this bottom face of the sealing tape 10, respectively. A generally rectangular sheet cutting step 400 for cutting into at least one sealing tape of elongate shape having a predetermined thickness.

In the sealing tape preparation step 100, an antioxidant, pigment and extender, together with the vulcanized rubber base material and the vulcanization accelerator thereof, are filled in the hopper 101 and mixed therein to have a temperature of about 50 ° C. Prepare the ingredients.

In the sealing tape forming step 200, the thus prepared sealing tape material is formed into a generally rectangular sheet 201 while maintaining the unvulcanized state or condition. In particular, the sealing tape material supplied from the hopper 101 is compressed between the pair of extrusion rolls 202 to form a generally rectangular sheet 201.

In this case, the sealing tape material may be molded into a predetermined form by the unvulcanized state or condition of the sealing tape material. In addition, a sealing tape material in a semi-vulcanized state or condition may be used in the method of the present invention.

The rectangular sheet 201 generally has a flat bottom surface which may be curved slightly circularly in the direction perpendicular to the direction of movement of the sheet 201.

In the adhesive attaching step 300, the adhesive is attached to the bottom of the generally rectangular sheet 201 through the adhesive sheet 301. In particular, prior to the adhesive attaching step 300, the adhesive is attached to both sides of the adhesive sheet 301. Thereafter, a protective tape 302 is attached to both sides of the adhesive sheet 301 which will later be wound on a roll. In the adhesive attaching step 300, one of the protective sheets 302 attached to the adhesive sheet 301 and disposed opposite the bottom surface of the rectangular sheet 201, the sheet 301 is formed on the bottom surface of the rectangular sheet 201. When attached, it is peeled off from the rolled or wound adhesive sheet 301, so that the adhesive sheet 301 is bonded to the bottom of the rectangular sheet 201 as shown in FIG. 2. Immediately after the sealing tape forming step 200, the adhesive sheet 301 should be attached to the rectangular sheet 201. The adhesive sheet 301 thus bonded to the bottom of the rectangular sheet 201 maintains a constant shape so that the sheet 201 can be wound for storage.

In the square sheet cutting step 400 as shown in FIGS. 2 and 3, the square sheet 201 is rotatably driven counterclockwise as shown in FIG. 2 while moving along the stand 410. The upper surface is pressed by the roll-type cutter 401, and the rectangular sheet 201 is cut into the sealing tape 10 of the present invention at a time. In other words, as shown in FIG. 4, the roll-shaped cutter 401 is provided with a plurality of circular blades 402 axially spaced from each other by an annular groove or a concave portion 403 formed in the outer circumference of the cutter 401. Therefore, the rectangular sheet 201 is generally cut into a plurality of elongated sealing tapes 10 having a predetermined thickness measured in a direction perpendicular to the bottom face 1 and the bottom face 1 of the sealing tape 10, respectively.

The bottom face 1 of the sealing tape 10 is flat and may be slightly curved in a direction perpendicular to the longitudinal axis of the elongate sealing tape 10.

The maximum depth h of the annular recessed portion 403 of the rolled cutter 401 is greater than the thickness of the rectangular sheet 201 as shown in FIG. 5. As a result, when the rectangular sheet 201 is pressed into the sealing tape 10 by the rolled cutter 401 and cut, the upper portion of each piece X (shown in the cross section of FIG. 5) of the rectangular sheet 201 is cut. Both corners of are pressed to form the upper portion of the circular curved roof shape Y (shown in cross section in FIG. 5) of the sealing tape 10. In fact, the upper circular curved portion of the circular domed roof shape Y is slightly larger in cross-sectional area than the piece X of the rectangular sheet 201, preventing the sealing tape material from overflowing into the annular concave portion 403.

As described above, in the method of the present invention, the rectangular sheet 201 moves from left to right (as shown in FIG. 2) and is subjected to a plurality of unvulcanized sealing tapes 10 by a rolled cutter 401. It is pressed and cut).

In the above embodiment of the present invention, the annular concave portion 403 of the rolled cutter 401 is a circular curved surface in cross section as clearly shown in Fig. 4, but may be any other form, such that the sealing tape 10 May be produced so that the upper surface has a predetermined shape.

In the following, an embodiment of the method of the present invention for producing the sealing tape 10 is described.

This other embodiment of the method of the present invention includes both the sealing tape material preparation step 100 as described above, the sealing tape forming step 200 and the adhesive attaching step 300. As shown in FIG. 6, after completion of the adhesive attaching step 300, the rectangular sheet 201 is wound on a roll 203 for storage. By the pair of compression rolls 303 and 304, the adhesive sheet 301 is bonded to the square sheet 201. In other words, the adhesive sheet 301 is attached to the back of the rectangular sheet 201.

Then, as shown in FIG. 7, the leading end of the roll 203 (ie, the rolled rectangular sheet 201) is pulled to the right to release the roll 203, so that the unwrapped rectangular sheet 201 It is flattened on the stand 410 by a pair of holding rolls 305 and 306.

The flattened rectangular sheet 201 then moves to the right in the stand 410 and between the rolled cutter 404 and the compression roll 405 disposed opposite the cutter 404 as shown in FIG. By being fitted, the rectangular sheet cutting step 400 is realized. As shown in FIG. 8, the rolled cutter 404 is provided with a cylindrical barrel portion 404a fixedly mounted with a plurality of circular blades 404b spaced at equal intervals from each other. The depth of the annular groove or concave portion formed between adjacent circular blades 404b of the cylindrical barrel portion 404a is greater than the thickness of the rectangular sheet 201. As a result, when the square sheet 21 is pressed by the roll-shaped cutter 404, the sheet 201 has a generally large number of quadrangles each having a cross section having a predetermined thickness, as shown in Fig. 10A. Is cut into an elongated sealing tape (11).

Then, the sealing tape 11 thus obtained is guided and aligned along the movement path by the guide roll 501 shown in FIG. In the guide roll 501, a plurality of circular grid members 501b are spaced apart from each other at equal intervals so that each sealing tape 11 is received in a space formed between adjacent circular grid members 501b of the guide roll 501a. This provides a cylindrical barrel portion 501a in which a plurality of circular grating members 501b are fixedly mounted. The height of the grid member 501b is greater than the height or thickness of the rectangular sheet 201 or the sealing tape 11. The compression roll 502 next to the guide roll 501 then presses the upper surface of the sealing tape 11 to eliminate the height difference between these tapes 11 of the stand 410.

Then, as shown in Fig. 10 (b), each of the sealing tapes 11 thus aligned is moved upwards by a roll grinder or cutter 503 having a rotational speed slightly faster than the moving speed of the sealing tape 11. Both corner portions 11a are trimmed. This grinder or cutter 503 is provided with a cylindrical barrel portion. Each of the plurality of annular grooves or recesses 504 formed in the outer periphery of the grinder or cutter 503 extends in the circumferential direction of the grinder or cutter 503 and has a circular curved surface. As a result, after completion of the trimming operation processed by the grinder or cutter 503, the sealing tape 10 having a circular curved surface as shown in FIG. 1 or as dotted lines in FIG. 10 (b). Is obtained. The grinder or cutter 503 has the same form as the rolled cutter shown in Fig. 4, except that the depth of the groove or concave portion 504, each formed by the filling means, is equal to the height of the sealing tape 11. It may have a surface with an annular groove or concave portion 504.

On the other hand, a vacuum conduit 601 is disposed directly on top of the rolled grinder or cutter 503 to suck in dust and tape filling removed by the grinder or cutter 503. The press roll 602 is disposed directly under the rolled grinder or cutter 503 to eliminate the height difference between the sealing tapes 11. Thereafter, each sealing tape 11 passing through the press roll 602 is wound on a winding roll 603 rotatably mounted to the stand 410.

In this embodiment of the present invention, the rolled grinder or cutter 503 is rotated clockwise, ie in the direction opposite to the moving direction of the sealing tape 11, as shown in FIG. However, if the rotation speed of the grinder or cutter 503 is faster than the moving speed of the sealing tape 11, the grinder or cutter 503 can rotate counterclockwise.

In the following, the repairing method by the sealing tape 11 thus obtained in accordance with the present invention is described.

When the vehicle body panel is damaged, the damaged panel must be repaired. In this repair, the sheet metal is first repaired. Then, according to the present invention, the sealing tape (shown in FIG. 1) is cut into pieces having a predetermined length. Thereafter, the adhesive layer 3 of the bottom face 1 of the piece of sealing tape having a predetermined length thus obtained (hereinafter simply referred to as sealing tape) is peeled off the protective sheet (shown in FIG. 1) and then connected to the connection between the metal plates. Attached, the connecting portion of the metal plate is covered with the sealing tape 10 and joined.

In particular, at the connection, one surface of the metal plate is adjacent to the surface of the other metal plate. As a result, when the sealing tape 10 is attached and bonded to one of the metal plates at the connecting portion, it is possible to prevent dust and water from flowing into the connecting portion. As mentioned above, the sealing tape 10 of this invention can seal-sealed the connection part of a metal plate.

Since the sealing tape 10 is in a state or condition that is not vulcanized and thus can be molded into a predetermined shape, the sealing tape 10 can be bent when the tape 10 is attached to the connection portion of the metal plate.

After the sealing tape 10 has been attached to the joint of the metal plate, the paint of the body color is sprayed onto the joint to form a paint layer, and then a forced thermal reaction treatment for hardening the thus attached paint layer is performed for at least half an hour. Paint is applied to the connections in a manner that is done in a spray booth at a temperature of < RTI ID = 0.0 > As a result, the sealing tape 10 can be vulcanized during the forced thermal reaction treatment. After completion of the forced thermal reaction treatment, the vulcanized sealing tape 10 can keep the final shape constant and elastic even when subjected to external force.

Since the sealing tape 10 is in a state or condition that is not vulcanized, the sealing tape 10 can be bonded to a predetermined object and its shape can change to Europe. Even when the sealing tape 10 is bent in a predetermined shape along the connection portion of the metal plate, there is no risk that these bends of the sealing tape 10 are loosened or separated from the connection portion of the metal plate.

Also, at this time, the bottom face 1 of the sealing tape 10 (covered with the adhesive layer 3) is changed in shape when pressed against the connecting portion of the metal plate, so that the adhesive to be bonded to the bottom face of the sealing tape 10. The layer 3 can be fitted to the connection of the metal plate. As a result, even when the connection of the metal plate is formed with a stepped surface, the sealing tape 10 of the present invention can be fitted to this stepped joint surface of the connection.

After the sealing tape 10 is attached to the connection portion of the metal plate, the sealing tape 10 attached to the connection portion is subjected to a coating process in which the sealing tape is coated and then heat treated and vulcanized. 10) can maintain the bent shape constantly and elastically.

Therefore, the repair method of the present invention may omit the conventional vulcanization step, since the conventional coating process is accompanied by a unique heat treatment step in which the sealing tape can be vulcanized.

11 is another embodiment of the sealing tape of the present invention. The sealing tape 10 shown in FIG. 11 is made of the same sealing tape material as the sealing tape 10 shown in FIG. The big difference between these sealing tapes 10 is that the sealing tape shown in FIG. 11 has a stepped bottom, while the sealing tape shown in FIG. 1 has a flat bottom. In addition, in the embodiment of the sealing tape 10 shown in FIG. 11, the adhesive layer 3 and the protective sheet 4 of FIG. 1 are omitted for clarity.

In particular, the stepped bottom of the sealing tape 10 shown in FIG. 11 has a first flat bottom 11, a second flat bottom 12 at a lower position than the first flat bottom 11, and a connection therebetween. It consists of a surface 13, the connecting surface 13 extends in the vertical direction between the bottom (11, 12).

As is clearly shown in FIG. 11, the sealing tape 10 is on the opposite side of the upper circular curved convex 14 and the second flat bottom 12 disposed opposite the first flat bottom 11. A flange face 15 disposed thereon and a base 16 disposed between the convex face 14 and the flange face 15 extending along the entire length of the sealing tape 10.

The stepped bottom of the sealing tape 10 having the above-described structure makes it easy to attach the sealing tape 10 to the stepped connecting portions formed between the metal plates. For example, as shown in FIG. 13, the second metal plate B has an edge portion to be fitted to the bent end C of the first metal plate A, so that the stepped joint D is therebetween. Is formed. When the connecting portion D is longitudinally covered by the sealing tape 10 shown in FIG. 11, the sealing tape 10 is arranged on the opposite side of the concave surface 14 of the sealing tape 10. The connection part D in such a manner that the flat surface 11 is joined to the metal plate A, and the second flat bottom face 12 disposed opposite the flange face 15 of the sealing tape 10 is joined to the metal plate B. ) Is attached.

As a result, the sealing tape 10 has a connecting face 13 between the bottom faces 11 and 12 and the bottom face which completely fits the stepped joints D of the metal plates A and B, and thus the connecting portion D. Is hermetically sealed.

(Yes)

In the following, examples of the sealing tapes 10 and 11 of the present invention are described.

40 parts by weight of the unvulcanized rubber base material, 10 parts by weight of sulfur oxide as vulcanization accelerator, 12 parts by weight of polybutene as antioxidant, 10 parts by weight of titanium oxide as pigment, and 28 parts of calcium carbonate as extender The parts by weight are mixed in the hopper 101 at a temperature of about 50 ° C. to prepare the sealing tape.

The components of the so-called sealing tape material are shown in Table 1 below.

Rubber base material 40 parts by weight Sulfur oxide 10 parts by weight Polybutene 12 parts by weight Titanium oxide 10 parts by weight Calcium carbonate 28 parts by weight

As shown in FIG. 2, the thus prepared sealing tape material is then formed into a generally rectangular sheet 201 having a length of 12 cm in the forming step 200. Immediately after completing this forming step 200, an adhesive sheet 301 coated with an adhesive is attached to the back side of the rectangular sheet 201. Thereafter, the rectangular sheet 201 is cut into a plurality of sealing tapes 10 at a temperature of about 40 ° C at a time by the roll cutter 401 of the stand 410.

The unvulcanized sealing tape 10 thus obtained is attached to the bent connection formed between the metal plates. After the sealing tape 10 is attached to the bent connection, the sealing tape 10 of this bent connection of the metal plate is not loosened or separated. Thereafter, a coating process is performed in which the sealing tape 10 attached to the bent connecting portion of the metal plate is heat treated and vulcanized. Thereafter, the vulcanized sealing tape 10 can elastically retain the fixed form bent along the bent connection of the metal plate.

In the unvulcanized sealing tape 10 of the present invention, due to the unvulcanized state, the sealing tape 10 may be bonded to a predetermined object and may be changed in shape to fit the shape of the predetermined object. Thus, the sealing tape 10 attached to a given object has no risk of loosening or detachment. As a result, the sealing tapes 10 and 11 of the present invention can be attached to a predetermined object in an easy manner, and the final appearance of the sealing tapes 10 and 11 of the present invention attached to the predetermined object is improved.

In the method of the present invention for producing the sealing tapes 10, 11, the rectangular sheet 201 is continuously cut by the rolled cutter 401 while moving on the stand 410, thus making the elongate unvulcanized sealing Tapes 10 and 11 can be obtained.

Due to the annular groove or concave portion 403 of the cutter 401, the upper surfaces of the sealing tapes 10, 11 of the present invention are formed in the convex shape of the circular curved surface or the shape of the round domed roof, so that the sealing tapes 10, 11 ) Is suitable for use.

In the method of the present invention for repairing, the sealing tapes 10 and 11 are bent while attached to the joints of the metal plate. Thereafter, the sealing tapes 10 and 11 of the present invention attached to the connecting portion are subjected to a coating treatment in which the sealing tapes 10 and 11 are heat treated and vulcanized. As a result, the vulcanized sealing tapes 10 and 11 of the present invention can elastically retain a fixed form formed when attached to the connecting portion of the metal plate during repair. Due to the coating process accompanied by the heat treatment step, the repair method of the present invention can omit the conventional independent vulcanization treatment.

According to the present invention, since it is attachable without being vulcanized, the shape is freely deformed, and even when it is bent into a desired shape, no looseness or peeling occurs in this part, and the repair work is simple and at the same time finish A sealing tape in good condition is provided.

Claims (13)

A sealing tape made of a non-vulcanized rubber base material and a sealing tape material containing a vulcanization accelerator, wherein the sealing tape has an elongated shape having a bottom surface and having a predetermined thickness in a direction perpendicular to the bottom surface. Sealing tape. A sealing tape according to claim 1, wherein an antioxidant is added to the vulcanization accelerator and the unvulcanized rubber base material. The sealing tape according to claim 1, wherein an adhesive is attached to said bottom surface of said sealing tape. The sealing tape of claim 1, wherein the bottom surface is a stepped surface. A sealing tape material preparation step for preparing a sealing tape material containing a vulcanized rubber base material and a vulcanization accelerator, A sealing tape forming step of forming the sealing tape material into a generally rectangular sheet while maintaining the unvulcanized state; An adhesive attaching step for attaching the adhesive coated sheet of adhesive to the bottom of the rectangular sheet, and The upper surface of the sheet is pressed by a roll-type cutter having at least one pair of circular blades axially spaced apart from each other by an annular recess formed in an outer circumferential portion while moving the square sheet, and the square sheet is pressed against the bottom and the And a rectangular sheet cutting step for cutting into at least one of the elongated sealing tape having a predetermined thickness in a direction perpendicular to the bottom surface of the sealing tape. 6. The method of claim 5, wherein the cross section of the annular recess of the rolled cutter has a circular curved shape. 6. A method of producing a sealing tape according to claim 5, wherein an antioxidant is added in the preparing of the sealing tape material. Sealing tape material preparation means for preparing a sealing tape material containing a vulcanized rubber base material and a vulcanization accelerator, Sealing tape forming means for forming the sealing tape material into a generally rectangular sheet while remaining unvulcanized; Adhesive attachment means for attaching an adhesive sheet coated with an adhesive to the bottom of the rectangular sheet; The upper surface of the sheet is pressed by a roll-type cutter having at least one pair of circular blades axially spaced apart from each other by an annular recess formed in an outer circumferential portion while moving the square sheet, and the square sheet is pressed against the bottom and the And a rectangular sheet cutting means for cutting into at least one elongated sealing tape having a predetermined thickness in a direction perpendicular to the bottom surface of the sealing tape. 9. The sealing tape production apparatus according to claim 8, wherein the cross section of the annular recess of the rolled cutter has a circular curved shape. 9. An apparatus for producing a sealing tape according to claim 8, wherein an antioxidant is added to said sealing tape material preparation means. A sealing tape material preparation step for preparing a sealing tape material containing a vulcanized rubber base material and a vulcanization accelerator, A sealing tape forming step wherein said sealing tape material is formed into a generally rectangular sheet while maintaining unvulcanized conditions; An adhesive attaching step for attaching the adhesive sheet coated with the adhesive to the bottom of the rectangular sheet; The upper surface of the sheet is pressed by a roll-type cutter having at least one pair of circular blades axially spaced apart from each other by an annular recess formed in an outer circumferential portion while moving the square sheet, and the square sheet is bottomed and the A rectangular sheet cutting step for cutting into one or more said sealing tapes having an elongate shape having a predetermined thickness in a direction perpendicular to the bottom surface of the sealing tape, wherein the depth of the annular recess of the rolled cutter is greater than that of the rectangular sheet; Cutting the sheet to be larger than a predetermined thickness, and And a longitudinal trimming step of longitudinally trimming both corner portions of the cross section of the upper surface of the sealing tape by roll-type cutter grinding means. Sealing tape material preparation means for preparing a sealing tape material containing a vulcanized rubber base material and a vulcanization accelerator, Sealing tape forming means, wherein the sealing tape material is formed into a generally rectangular sheet while maintaining conditions that are not vulcanized; Adhesive attachment means for attaching an adhesive sheet coated with an adhesive to the bottom of the rectangular sheet; While moving the rectangular sheet, the upper surface of the sheet is pressed by a roll-type cutter having at least one pair of circular blades in the axial direction with each other by an annular recess formed in an outer circumferential portion, and the square sheet is respectively bottom and the Rectangular sheet cutting means for cutting into one or more elongated sealing tapes having a predetermined thickness in a direction perpendicular to the bottom surface of the sealing tape, wherein a depth of the annular recess of the roll-shaped cutter is defined by the predetermined sheet of the rectangular sheet; Sheet cutting means larger than the thickness, and And longitudinal trimming means for longitudinally trimming corner portions on both sides of the cross section of the upper surface of the sealing tape by roll-type cutter grinding means. Attaching the sealing tape to the connection for bending and bonding the sealing tape to a connection between a pair of metal surfaces or metal plates, wherein the sealing tape contains an unvulcanized rubber base material and a vulcanization accelerator of the material. An attaching step made of a sealing tape material, the attachment step having a bottom surface and having an elongate shape having a predetermined thickness in a direction perpendicular to the bottom surface; Painting paint on an upper surface of the sealing tape bent and bonded to the connecting portion, wherein the bent and bonded sealing tape is vulcanized and heated to form a final rubber product having a fixed elastic shape by heating the paint. And a paint coating step of coating the paint at the time of processing.