JP2008126479A - Method for removing buffing dust from tire casing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for removing a buffing dust from a tire casing which restrains the cost and space for installing a buffing dust removing apparatus and improves the productivity by shortening the working time. <P>SOLUTION: The method for removing the buffing dust on the tire casing is the one in which the rasp (file) 2, which performs the buffing treatment by grinding the tread cutting surface Ta of a tire casing T to be regenerated, is covered, in which the buffing dust, which scatters to the inside of the cover member 3 covering the portion where the rasp 2 contacts the tire casing T rotating with the axis as the center and performs the grinding, is sucked and cleared, and in which the brushes 11, 12, 13 arranged inside of the covering member 3 contact, while revolving, the buffing face of the tire casing T to remove the buffing dust adhering to the buffing face. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for removing buffing powder adhering to a base tire by buffing in the process of attaching a new tread rubber to a base tire from which a remaining tread rubber of a used tire has been removed by cutting.

  For worn tires, the remaining tread rubber is removed and a new tread rubber is pasted and molded, and then vulcanized to obtain a retreaded tire. However, the tread rubber is pasted accurately and securely onto the base tire from which the remaining tread rubber has been removed by cutting. For this purpose, the tread cutting surface of the base tire needs to be ground with high accuracy to accurately form the outer diameter dimension of the cutting surface.

For this reason, various buffing devices for retread tires that grind the tread cutting surface of a base tire with a buffing jig (rasp) have been proposed (for example, see Patent Document 1).
JP 2000-177027 A

  The buffing device for retread tire disclosed in Patent Document 1 grinds (buffs) a tread cutting surface of a base tire supported in an upright state by a tread buffing machine and a shoulder buffing machine.

When the tread cutting surface of the base tire is ground, buff powder is generated, and a part thereof adheres to the ground surface of the base tire.
If a new tread rubber is affixed to the next tire while the buffing powder is adhered to the base tire, the affixing may be hindered, or the buffing powder may remain as a foreign substance until the end, resulting in a problem in merchandise.

Therefore, it is necessary to remove the buffing powder adhering to the base tire after the buffing process, but the buffing device for retread tire disclosed in Patent Document 1 has no buffing powder removing means for removing the buffing powder.
Therefore, a buff powder removing device is separately introduced, and after the buffing process, a buff powder removing step by the buff powder removing device is added to remove the buff powder.

  Therefore, the cost for introducing the buff powder removing apparatus is required, and the installation space for the apparatus is also required. Further, the addition of the buff powder removing process increases the work time and decreases the productivity.

  This invention is made | formed in view of this point, The process made into the objective can suppress the cost and space for installation of a buffing powder removal apparatus, and can aim at the improvement of productivity by shortening working time. It is in the point which provides the buffing powder removal method of a base tire.

  In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that the ras is in contact with the base tire rotating around the shaft while covering the rust to be buffed by grinding the tread cutting surface of the base tire for rehabilitation. The buff powder scattered inside the cover member covering the portion to be ground is removed by suction, and the brush disposed inside the cover member rotates and contacts the buff surface of the base tire while adhering to the buff surface. The buff powder was removed from the base tire.

  According to a second aspect of the present invention, in the method for removing buff powder from the base tire according to the first aspect, a relative speed difference is generated between the peripheral speed of the buff surface of the base tire and the peripheral speed of the brush tip of the brush. The brush is rotated.

  According to a third aspect of the present invention, in the buff powder removing method for a base tire according to the second aspect, the brushes each having a cylindrical shape rotate on each of the crown portion of the base tire and the buttress portions on both sides of the crown portion. The buffing powder adhering to the buff surface of the base tire is removed while being in contact therewith.

  According to the method for removing buff powder from a base tire according to claim 1, the buff powder attached to the buff surface is in contact with the buff surface of the base tire while the brush disposed inside the cover member covering the ras rotates. Since it is removed, a buffing device with a brush is incorporated in the buffing device that grinds with the rasp, and the cost and space for installing the buffing device are reduced, and the buffing and buffing processing are performed almost simultaneously. Time can be shortened and productivity can be improved.

  According to the method for removing buff powder from a base tire according to claim 2, the brush is rotated so that a relative speed difference is generated between the peripheral speed of the buff surface of the base tire and the peripheral speed of the brush tip of the brush. The buff powder adhering to the buff surface of the brush can be easily removed.

  According to the method for removing buff powder from a base tire according to claim 3, the brushes each having a cylindrical shape are in contact with the tread portion of the base tire and the buttress portions on both sides of the base tire while rotating and adhere to the buff surface of the base tire. Since the buffing powder thus removed is removed, the buffing powder adhering to the buffing surface of the base tire can be almost certainly removed, and the merchantability of the regenerated tire can be maintained high.

Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
FIG. 1 shows a schematic side view (partially cross-sectional view) of the retread tire buffing apparatus 1, and FIG. 2 shows the same plan view.
A base tire T from which the remaining tread rubber of the worn tire is cut and removed is supported so as to be rotatable about the shaft in an upright posture, and is driven to rotate clockwise in FIG.

From the side of the tread cutting surface Ta of the base tire T, the rasp 2 as a rotary polishing tool approaches while rotating to grind the tread cutting surface Ta into a predetermined shape.
The rotation direction of the rasp 2 is the same clockwise as that of the base tire T in FIG. 1, and the tread cutting surface Ta is ground at a peripheral speed in the opposite direction.

A cover member 3 that covers the portion to be ground by contacting the rasp 2 to the base tire T covers the rear tire including the rasp 2 from behind.
The cover member 3 forms a rectangular tube shape to cover the rasp 2 from behind, and extends toward the base tire T to cover a part of the tread cutting surface Ta (part where the rasp 2 contacts) and its periphery. The rear side of the rasp 2 has a cross-sectional opening area that is gradually reduced, and then has a flat cylindrical shape and extends rearward.

A vacuum device (not shown) is provided behind the flat cylindrical shape of the cover member 3, and air in the cover member 3 is sucked by the vacuum device.
A crown portion brush 11 and a pair of left and right buttress portion brushes 12 and 13 are disposed upstream of the rasp 2 of the tread cutting surface Ta of the rotating base tire T in the rotation direction.

  The crown brush 11 and the buttress brushes 12 and 13 are both cylindrical brushes that are rotated by a drive mechanism (not shown), and are covered with the cover member 3 inside the cover member 3.

The crown brush 11 contacts the crown portion of the tread cutting surface Ta of the base tire T while rotating, and the left and right buttress brushes 12 and 13 contact the buttress portions at the left and right end portions of the tread cutting surface Ta while rotating.
The crown brush 11 and buttress brushes 12 and 13 are rotated counterclockwise opposite to the base tire T in FIG. 1, and the peripheral speed of the brush tip due to the rotation is the peripheral speed of the tread cutting surface Ta of the base tire T. It is set faster.

  The left and right buttress part brushes 12 and 13 are located slightly downstream in the rotational direction of the base tire T from the crown part brush 11 and are disposed so as not to interfere with the crown part brush 11 and its drive mechanism.

  A buff powder removing device 10 comprising a crown portion brush 11, a buttress portion brushes 12, 13 and a drive mechanism of each brush 11, 12, 13 is incorporated in the retread tire buff device 1 and the retread tire buff device 1 and the cover member. 3 can be moved back and forth.

  Therefore, when the buffing device 1 for retreaded tires approaches the base tire T that rotates integrally with the buff powder removing device 10 and the front end opening of the cover member 3 covers a part of the base tire T, the rotating rasp 2 becomes the base. The tread cutting surface Ta is polished in contact with the tread cutting surface Ta of the tire T.

  The buff powder generated by this polishing is scattered in the cover member 3 and sucked behind the rasp 2 by the vacuum device to be removed, but a part of the buff powder remains attached to the buff surface of the base tire T. .

  The buff powder adhering to the buff surface of the base tire T comes out of the cover member 3 by the rotation of the base tire T. When the buff powder enters the cover member 3 again, the crown brush 11 rotates in contact with the buff surface. And the left and right buttress part brushes 12 and 13 are wiped off and removed.

Since the cylindrical brushes 11, 12, and 13 having a relatively high peripheral speed are in contact with the buff surface of the base tire T while rotating, the buff powder attached to the buff surface is efficiently removed.
Further, since the direction in which the buff powder is wiped off from the rotation direction of the cylindrical brushes 11, 12 and 13 is a wide space in the center of the cover member 3, the buff powder does not accumulate.
The removed buff powder is sucked out by the vacuum device.

  As described above, the buffing powder removing device 10 using the crown brush 11 and the buttress brushes 12 and 13 is incorporated in the retread tire buffing device 1 that is ground by the rasp 2, and the cost for installing the buffing powder removing device 10 is reduced. Space can be reduced, and buffing and buffing powder removal can be performed substantially simultaneously, reducing work time and improving productivity.

  After the buffing of the base tire T in the retreaded tire buffing apparatus 1 is completed almost simultaneously with the buffing powder removing process, if the retreaded tire buffing apparatus 1 is retracted, the buffing powder removing apparatus 10 is also retracted integrally. The removal of the base tire T and the setting of a new base tire T can be performed immediately, and further improvement in productivity can be expected.

  In the above embodiment, the crown brush 11 and the buttress part brushes 12 and 13 are arranged on the upstream side in the rotation direction from the rasp 2 of the tread cutting surface Ta of the rotating tire T, but the downstream side in the rotation direction from the rasp 2. The embodiment is shown in FIG.

In the present embodiment, the base tire T and the rehabilitation buff device 1 are the same as those in the above-described embodiment, and are indicated by the same reference numerals in FIG.
A crown portion brush 21 and buttress portion brushes 22 and 23, which are cylindrical brushes of the buff powder removing device 20, are disposed inside the cover member 3 and downstream of the rasp 2 in the rotation direction of the base tire T.

However, the rotation direction of the crown portion brush 21 and the buttress portion brushes 22, 23 is the same clockwise as the rotation direction of the base tire T in FIG.
Therefore, the peripheral speed of the brush tip due to the rotation of the crown part brush 21 and the buttress part brushes 22 and 23 becomes a speed opposite to the peripheral speed of the tread cutting surface Ta of the table tire T in contact therewith, and the relative peripheral speed is large. The buff powder adhering to the buff surface is efficiently removed.
Moreover, since the direction in which the buff powder is removed from the rotation direction of the cylindrical brushes 21, 22, and 23 is a wide space at the center of the cover member 3, the buff powder does not accumulate.

  Also in this embodiment, the buffing powder removing device 20 is incorporated in the retread tire buffing device 1 to reduce the cost and space for installing the buffing powder removing device 20, and the buffing processing and the buffing powder removal processing are executed almost simultaneously. As a result, the work time can be shortened and productivity can be improved.

  The crown brush and the buttress brush are arranged together on the upstream side or the downstream side in the rotation direction of the rasp base tire T. However, the crown brush and the buttress brush are separated from each other with the rasp in between. May be arranged.

1 is a schematic side view (partial cross-sectional view) of a retread buffing device according to an embodiment of the present invention. It is the same top view. It is a figure which shows relative arrangement | positioning of the crown part brush with respect to a base tire, and a pair of left and right buttress part brushes. It is a schematic side surface (partial cross section) figure of the buffing device for retreaded tires concerning another embodiment.

Explanation of symbols

T ... stand tire, Ta ... tread cutting surface,
DESCRIPTION OF SYMBOLS 1 ... Buff apparatus for retreaded tires, 2 ... Rasp, 3 ... Cover member,
10 ... Buff powder removing device, 11 ... Crown brush, 12, 13 ... Buttress brush,
20 ... Buff powder removing device, 21 ... Crown brush, 22, 23 ... Buttress brush.

Claims (3)

Covering the rust to be buffed by grinding the tread cutting surface of the base tire for rehabilitation, and buffing powder scattered inside the cover member covering the part to be ground by contact with the base tire rotating around the shaft. Eliminate the suction,
A method for removing buffing powder from a base tire, wherein the buffing powder attached to the buffing surface is removed while being in contact with the buffing surface of the base tire while a brush disposed inside the cover member rotates.   2. The buff powder removing method for a base tire according to claim 1, wherein the brush is rotated so that a relative speed difference is generated between a peripheral speed of a buff surface of the base tire and a peripheral speed of a brush tip of the brush. .   The baff powder adhering to the buff surface of the base tire is removed by the rotation of the cylindrical brushes on the crown portion of the base tire and the buttress portions on both sides of the crown portion while rotating. 2. A method for removing buffing powder from a base tire according to 2.

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