KR20240048794A - Tire sound absorbing material crimping device - Google Patents

Abstract

A tire sound-absorbing material compression device is provided.
This tire sound-absorbing material compression device includes a compression unit for compressing the sound-absorbing material while expanding radially toward the sound-absorbing material when the sound-absorbing material is attached to the inner liner of the tire, and a motor unit installed on top of the compression unit to move the compression unit toward the tire. , it is detachably assembled in the pressing portion and may include a marker for marking characters on the sound-absorbing material when compressing the sound-absorbing material.

Description

Tire sound absorbing material compression device {TIRE SOUND ABSORBING MATERIAL CRIMPING DEVICE}

The present invention relates to a device for compressing tire sound-absorbing material.

In general, tires go through refining, rolling, extrusion, and bead processes to create green tires through a molding process, and then manufacture finished tires through a vulcanization process. Finished tires have air injected inside, and the noise generated inside the tire when driving is called resonance sound. This noise causes a decrease in the sensitivity of the driver and personnel driving the vehicle.

In order to reduce this tire resonance sound, a sound-absorbing material is attached along the circumferential direction to the inner side of the tire, more precisely, to the inner liner area located on the opposite side of the tire tread. In the method of attaching the sound-absorbing material, first, adhesive is applied to the position on the tire inner liner where the sound-absorbing material is to be attached, then the sound-absorbing material is attached, and the sound-absorbing material is firmly fixed by pressing it onto the adhesive through a separate sound-absorbing material attachment device.

In this regard, Republic of Korea Patent No. 10-1775797 discloses “a tire sound-absorbing material fixing structure having a sound-absorbing material fixing band and a tire manufactured including the same,” and more specifically, “the method of using the tire sound-absorbing material fixing structure is: Applying force to the pressing part to extend the sound-absorbing material fixing band upward, placing the sound-absorbing material in the lower part of the pressing part, removing the force stretching the sound-absorbing material fixing band, and applying downward pressure to the sound-absorbing material as the sound-absorbing material fixing band contracts. Step, maintaining the sound-absorbing material fixing band in close contact with the sound-absorbing material and the inner surface of the tire, extending the adjacent sound-absorbing material fixing band upward to position the sound-absorbing material in the lower part of the pressing portion of the adjacent sound-absorbing material fixing band. and repeating the above steps until the sound-absorbing material is fixedly attached throughout the sound-absorbing material fixing band formed along the circumferential direction of the tire."

However, when using the tire sound-absorbing material fixing structure in the same manner as above, the steps of pressing the pressurizing part, placing it on the sound-absorbing material, applying downward pressure toward the sound-absorbing material, and adhering closely are repeated, to fix the sound-absorbing material fixing band. As workers must manually carry out the process without any additional auxiliary machines or devices, the time and effort required for the process itself is considerable, and as the above process is repeated, deviations may occur in the attachment position or strength, which may lead to a decline in quality. exist.

In particular, the specifications of the tire after vulcanization are marked on the sidewall through the mold, but the sound absorbing material has no separate marking even after attachment, so the specifications of the adhesive and sound absorbing material cannot be communicated to consumers, so consumers can have confidence in the quality of the sound absorbing material. There is a problem that is difficult to give.

Patent Document: Korean Patent Registration No. 10-1775797 (announced on September 6, 2017)

Embodiments of the present invention are intended to provide a tire sound-absorbing material pressing device that can mark letters while compressing the sound-absorbing material attached to the tire inner liner area.

According to one aspect of the present invention, when the sound-absorbing material is attached to the inner liner of the tire, a compression portion for compressing the sound-absorbing material while expanding radially toward the sound-absorbing material; a motor unit installed on top of the compression unit to move the compression unit toward the tire; And a tire sound-absorbing material pressing device that is detachably assembled to the compression unit and includes a marker for marking characters on the sound-absorbing material when the sound-absorbing material is pressed.

In addition, a tire sound-absorbing material pressing device may be provided, further comprising an ink applicator for applying ink to the marker.

Additionally, the pressing portion includes a first plate having a predetermined thickness and area; a plurality of main frames formed below the first plate and capable of expanding or contracting radially with respect to the central axis of the first plate; And a compression ring that interconnects the plurality of lower main frames and compresses the sound absorbing material while expanding or contracting in diameter in response to the operation of the main frame expanding or contracting radially. A tire sound absorbing material pressing device will be provided. You can.

In addition, the ink applicator includes an ink container portion that provides an accommodating space in which the ink can be stored and is formed with an application hole into which the type portion of the marker can be inserted; an ink nozzle unit that circulates the ink in the receiving space; And when the type portion is in contact with the sound absorbing material, an ink applicator that receives the ink from the ink nozzle portion and supplies the ink to the type portion, a tire sound absorbing material pressing device may be provided.

In addition, the marker includes a mounting bracket provided in the shape of a hook so that it can be fixed to the compression ring; A tire sound-absorbing material pressing device may be provided, including a type portion protruding from at least one surface of the mounting bracket portion in a predetermined character shape.

In addition, the compression ring is each connected to the plurality of lower parts of the main frame and includes a plurality of segments having a predetermined curvature, wherein the plurality of segments are located on a radial outer side and include a first segment having guide pins formed at both ends; And a second segment located on the radial inner side, connected by the guide pin, having a guide groove extending in the circumferential direction to guide the guide pin, and expanding and reducing the overall diameter of the compression ring. A tire sound-absorbing material compression device may be provided.

According to embodiments of the present invention, there is an effect of providing reliability regarding the quality of the sound absorbing material by marking the specifications of the adhesive and the sound absorbing material with letters on the sound absorbing material attached to the inner liner portion of the tire.

In addition, according to embodiments of the present invention, a marker capable of marking the specifications of the adhesive and sound-absorbing material with letters is attachable and detachable to the tire sound-absorbing material pressing device, so the content and order of the letters can be changed depending on the adhesive and sound-absorbing material, making it flexible. It has the effect of being able to deal with it.

In addition, according to embodiments of the present invention, there is an advantage that it can be universally used for all tires of various sizes by varying the compression conditions for each tire size.

Figure 1 is a perspective view of a tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 2 is a front view of a tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 3 is a detailed view of the compression portion showing a state in which the compression ring is contracted and expanded in the tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 4 is a top cross-sectional view of the compression portion in the tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 5 is a diagram showing the operating state of the compression unit in the tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 6 is a state diagram of the compression ring being reduced and expanded in the tire sound-absorbing material compression device according to an embodiment of the present invention.
Figures 7 and 8 are diagrams showing the contraction and expansion of the compression ring when the marker and ink applicator are applied to the tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 9 is a side view showing a marker of a tire sound-absorbing material compression device according to an embodiment of the present invention.
Figure 10 is a side view showing the ink applicator of the tire sound-absorbing material pressing device according to an embodiment of the present invention.
Figure 11 is a block diagram showing the process of marking a sound-absorbing material using a tire sound-absorbing material pressing device according to an embodiment of the present invention.

Hereinafter, specific embodiments for implementing the spirit of the present invention will be described in detail with reference to the drawings.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 11.

1 to 6, the tire sound-absorbing material pressing device according to an embodiment of the present invention may include a fixing unit 10, a pressing unit 20, a motor unit 30, a marker, and an ink applicator. .

Specifically, the fixing unit 10 can center and fix the position of the tire transported by the tire transfer unit 11. The transfer unit 11 may be a component of a transfer device such as a conveyor belt for a tire, preferably a tire with a sound-absorbing material attached to the tire inner liner.

The fixing part 10 may be located on the conveying part 11. The fixing portion 10 may extend along the width direction of the outer peripheral surface of the tire, and may move toward the central axis of the transported tire to center the tire while supporting the outer peripheral surface of the tire. The tire transported along the transfer unit 11 may be stopped while positioned at the lower part of the tire sound-absorbing material compression device. Thereafter, the tire may be fixed by the fixing part 10 to align the center without being separated from the tire sound-absorbing material compression device.

The compression portion 20 may expand radially toward the sound-absorbing material attached to the inner liner of the tire fixed to the fixing portion 10 and compress the sound-absorbing material. This compression unit 20 may include a first plate 210, a main frame 220, a compression ring 230, and a servomotor 240. The first plate 210 may be provided in the form of a plate having a predetermined thickness and area. The first plate 210 may preferably have a disk shape. The first plate 210 may have a diameter corresponding to the maximum extension length of the main frame 220 in the radial direction.

The main frame 220 may be formed below the first plate 210. The main frame 220 may be provided in plural pieces that expand or contract radially based on the central axis of the first plate 210.

The main frame 220 is the central axis of the first plate 210 and is composed of a plurality of frames that expand or contract radially based on the central axis of the tire, which is formed by fixing and centering the tire by the fixing part 10. You can. Preferably, the plurality of main frames 220 are arranged side by side along the circumferential circumference of the central axis of the first plate 210, so that the main frames 220 can be expanded or contracted radially.

According to a preferred feature of the present invention, the main frame 220 includes an upper frame 221 through which the screw 222 of the ball screw extending radially from the second gear 260 passes, and the upper frame 221. It may include a central frame 223 extending downward from and a lower frame 225 extending radially from the lower part of the central frame 223. A plurality of segments 231 are installed on the outside of the lower frame 225 to form a structure that expands or contracts radially.

The ball screw is an automated device that changes rotational motion into linear motion. It is provided as a ball screw structure in which the screw 222, which is connected to the second gear 260 that rotates in engagement with the first gear 250, extends radially. You can. The upper frame 221, which has a through hole formed so that the screw 222 passes through, acts as a ball screw nut of the ball screw, and when the second gear 260 rotates, the main frame 220 moves along the screw direction (i.e. It moves in a straight line (along the radial direction).

The compression ring 230 may connect the lower portions of the plurality of main frames 220 to each other. The compression ring 230 can compress the sound-absorbing material of the tire by expanding or contracting its diameter in response to the radial expansion or contraction of the main frame 220. When the main frame 220 is operated to expand or contract radially, the diameter of the compression ring 230, which is made of a ring type by connecting the lower parts of the plurality of main frames 220, can be expanded or reduced together. . As the diameter of the compression ring 230 expands, the sound-absorbing material attached to the inner liner portion of the tire can be firmly pressed to the inner liner of the tire. Preferably, the width direction length of the compression ring 230 and the width direction length of the sound absorbing material are made to correspond to each other, so that all areas of the sound absorbing material can be uniformly compressed.

These compression rings 230 are respectively connected to the lower portions of the plurality of main frames 220 and may include a plurality of segments 231 having a predetermined curvature. The plurality of segments 231 may have the same curvature and be connected to each other to form one circle.

The plurality of segments 231 may include a first segment 233 and a second segment 235. The first segment 233 may be located on the radial outer side of the tire. Guide pins 234 may be formed at both ends of the first segment 233.

The second segment 235 may be connected to the first segment 233 so that the overall diameter of the compression ring 230 is expanded or reduced. The second segment 235 may be located radially inside the tire. A guide groove 236 connected to the guide pin 234 of the first segment 233 may be formed in the second segment 235. The guide groove 236 may be formed to extend along the circumferential direction of the first segment 233 to guide the guide pin 234.

These first segments 233 and second segments 235 may be arranged to cross each other. At least partial areas at both ends of the first segment 233 and the second segment 235 may be arranged to overlap each other. When the main frame 220 is expanded, the guide pin 234 of the first segment 233 moves along the guide groove 236 of the second segment 235, and the first segment 233 and the second segment (235) The whole can be expanded radially. The plurality of segments 231 extend toward the sound-absorbing material and compress the sound-absorbing material, so that a uniform compression process can be achieved over the entire area of the sound-absorbing material.

The servomotor 240 may be installed on the first plate 210. When the servomotor 240 operates, the first gear 250 formed on the lower part of the servomotor 240 and the second gear 260 formed on one upper side of the main frame 220 engage and rotate, and the main frame 220 ) can expand and contract radially.

More specifically, the first gear 250 may be a gear rotating around the axial direction of the servomotor 240, and the second gear 260 is connected to the main frame 220 and operates as the first gear 250. ) may be a gear that rotates in mesh. The first gear 250 is a ring gear and the second gear 260 is a pinion gear. It is made up of a bevel gear (or spiral bevel gear) system, and the main frame 220 is radial in the axial direction of the servomotor 240. It can be converted to an axial direction that expands or contracts. Accordingly, when the servomotor 240 rotates, the second gear 260 of the main frame 220 rotates and radially expands or contracts due to gear operation.

The motor unit 30 is connected to the upper part of the compression unit 20 and can raise and lower the compression unit 20 toward the tire. The motor unit 30 may be installed on the second plate 310 located on top of the first plate 210. The motor unit 30 may be gear-connected to a plurality of shafts 320 extending upward from the first plate 210 through the second plate 310. When the motor unit 30 operates, the plurality of shafts 320 connected to the first plate 210 are lowered in the longitudinal direction by gear operation, and the pressing unit 20 may be moved toward the tire.

The process of lowering the compression unit 20 toward the transported tire before the process of radially expanding or contracting the compression unit 20 inside the tire and the process of raising it again after the compression is completed are described below.

The motor unit 30 is configured to raise and lower the compression unit 20, and is installed on the upper part of the first plate 210, and may be installed on the second plate 310 with a predetermined thickness and area. . In addition, a plurality of shafts 320 formed on the first plate 210 may extend upwardly through the second plate 310, and when the motor unit 30 operates, the shafts 320 are parallel to the horizontal direction. By rotating about the axis and engaging a gear formed on the outer peripheral surface of the shaft 320 to raise and lower the shaft 320, the compression portion 20 is lowered or raised toward the tire. The plurality of shafts 320 may be installed at a predetermined distance apart from the motor unit 30, and preferably have a structure for raising and lowering the compression unit 20 in balance.

Referring to FIGS. 7 to 9 , the marker 400 may be detachably assembled to the compression portion. The marker 400 receives ink from the ink applicator 500 and can mark characters on the sound-absorbing material when compressing the sound-absorbing material. Text can display information (standard, material, etc.) on adhesives and sound-absorbing materials. This marker 400 may include a mounting bracket portion 410 and a type portion 420.

The mounting bracket portion 410 may be provided in a hook shape so that it can be fixed to the compression ring. A locking groove that fits into the end of the compression ring may be formed in the mounting bracket portion 410. The locking groove may have a width corresponding to the thickness of the compression ring. A type portion 420 may be provided on at least a portion of the mounting bracket portion 410. The type portion 420 may be formed to protrude into a predetermined character shape on at least one side of the mounting bracket portion 410. The type portion 420 may be a character type representing information about the adhesive and sound-absorbing material.

Referring to FIG. 10 , the ink applicator 500 may apply ink to the marker 400 . In this embodiment, the ink may be an ink composition containing inorganic pigments such as titanium dioxide, zinc oxide, and silicon dioxide, which have good light resistance, weather resistance, and heat resistance.

The ink applicator 500 may include an ink container unit 510, an ink nozzle unit 520, and an ink application unit 530. The ink container unit 510 may provide a receiving space 511 in which ink can be stored. An application hole 512 into which the type portion 420 of the marker 400 can be inserted may be formed in the ink container portion 510. The ink nozzle unit 520 may be a nozzle device capable of circulating ink in the receiving space 511. The type portion 420 of the marker 400 may be applied with ink provided from the ink application portion 530 while inserted into the application hole 512.

The ink applicator 530 may be an applicator capable of supplying ink to the type part 420 of the marker 400. The ink applicator 530 may receive ink from the ink nozzle unit 520 and supply ink to the typeface 420 when the typeface 420 contacts the sound absorbing material.

Hereinafter, the operation and effect of the tire sound-absorbing material compression device having the above-described configuration will be described.

Referring to FIG. 11, first, a detachable marker 400 is mounted on a tire sound-absorbing material compression device equipped with a circular type compression ring 230. In order to set a designated position for compressing the tire to which the sound absorbing material is attached, the fixing part 10 moves toward the central axis to support the outer peripheral surface of the tire and perform centering work on the tire. The tire is fixed by the fixing part 10 so as not to be separated from the tire sound-absorbing material compression device.

During the tire centering process, the compression ring may expand simultaneously. When the pressure groove expands, the ink applicator 500 can apply the ink circulated in the ink container part 510 to the marker 400 through the ink applicator 530.

After centering work on the tire is completed, the tire sound-absorbing material compression device equipped with a compression ring automatically lowers to the center position of the sound-absorbing material attached to the inner liner portion of the tire. At that location, the compression ring of the tire sound-absorbing material compression device compresses the sound-absorbing material through pressure, and at the same time transfers the ink applied to the marker 400 to the sound-absorbing material. After automatic compression with a compression ring, the ink is sufficiently transferred to the sound-absorbing material by applying it for a predetermined time (for example, 1 minute), so that the characters are clearly marked on the sound-absorbing material. Afterwards, the compression ring attached to the marker 400 contracts and rises to its original position.

The above process can be automatically performed repeatedly when manufacturing a sound-absorbing tire. In this way, when manufacturing a sound-absorbing tire, after attaching the sound-absorbing material by applying an adhesive, when using a tire sound-absorbing material pressing device to maintain the sound-absorbing material in close contact with the inner liner portion of the tire, the marker mounted on the tire sound-absorbing material pressing device Using (400), letters can be automatically marked on the sound absorbing material.

As described above, the present invention can provide reliability of the quality of the sound absorbing material by marking the specifications of the adhesive and sound absorbing material with letters on the sound absorbing material attached to the inner liner portion of the tire, and can mark the specifications of the adhesive and sound absorbing material with letters. Since the marker can be attached and detached to the tire sound-absorbing material compression device, the content and order of the letters can be changed depending on the adhesive and sound-absorbing material, allowing for flexible response. The compression conditions are different for each tire size, making it universal for all tires of various sizes. It has excellent advantages such as being able to be used effectively.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will be able to understand it. For example, a person skilled in the art may change the material, size, etc. of each component depending on the field of application, or combine or substitute embodiments to implement the present invention in a form not clearly disclosed in the embodiments of the present invention, but this is also the present invention. It does not go beyond the scope of. Therefore, the embodiments described above are illustrative in all respects and should not be understood as limiting, and such modified embodiments should be considered to be included in the technical idea described in the claims of the present invention.

10: fixing part
11: Tire transfer unit
20: Compression part
210: first plate
220: mainframe
221: upper frame
222: screw
223: central frame
225: lower frame
230: Compression ring
231: segment
233: 1st segment
234: Guide pin
235: 2nd segment
236: Guide home
240: Servo motor
250: 1st gear
260: 2nd gear
30: motor part
310: second plate
320: shaft
400: marker
410: Mounting bracket part
420: Type section
500: Ink applicator
510: Ink container part
520: Ink nozzle part
530: Ink application unit

Claims (6)

When the sound-absorbing material is attached to the inner liner of a tire, a compression portion for compressing the sound-absorbing material while expanding radially toward the sound-absorbing material;
a motor unit installed on top of the compression unit to move the compression unit toward the tire; and
A tire sound-absorbing material pressing device that is detachably assembled to the pressing portion and includes a marker for marking characters on the sound-absorbing material when the sound-absorbing material is pressed. According to claim 1,
Tire sound-absorbing material pressing device further comprising an ink applicator for applying ink to the marker. According to claim 1,
The compression part,
A first plate having a predetermined thickness and area;
a plurality of main frames formed below the first plate and capable of expanding or contracting radially with respect to the central axis of the first plate; and
A tire sound-absorbing material pressing device comprising a compression ring that connects the plurality of lower main frames to each other and compresses the sound-absorbing material while expanding or contracting in diameter in response to an operation in which the main frame expands or contracts radially. According to clause 2,
The ink applicator
an ink container portion that provides a receiving space in which the ink can be stored and is formed with an application hole into which the type portion of the marker can be inserted;
an ink nozzle unit that circulates the ink in the receiving space; and
A tire sound-absorbing material pressing device comprising an ink applicator that receives the ink from the ink nozzle portion and supplies the ink to the type portion when the type portion is in contact with the sound absorbing material. According to clause 3,
The marker is
A mounting bracket provided in the shape of a hook so that it can be fixed to the compression ring; and
A tire sound-absorbing material pressing device comprising a type portion protruding from at least one surface of the mounting bracket portion in a predetermined character shape. According to clause 3,
The compression ring is
Includes a plurality of segments each connected to the plurality of lower main frames and having a predetermined curvature,
The plurality of segments are
A first segment located on the radial outer side and having guide pins formed at both ends; and
A second segment is located on the radial inner side and connected by the guide pin, has a guide groove extending in the circumferential direction to guide the guide pin, and is configured to expand and reduce the overall diameter of the compression ring. , Tire sound absorbing material compression device.