JP5081265B2 - Manufacturing method of rubber member for tire and manufacturing apparatus used therefor - Google Patents

Description

  The present invention provides a rubber member for a tire capable of directly and accurately winding a rubber strip from a rubber extruder on a molding former and reducing the dimensional variation of the wound strip after winding due to shrink (rubber shrinkage). And a manufacturing apparatus used therefor.

  In recent years, a long tape-shaped rubber strip is spirally wound and pasted on a cylindrical molding former to form a strip wound body close to a desired cross-sectional shape, for example, tread rubber, sidewall rubber, A so-called strip wind system in which rubber members for tires such as clinch rubber and breaker cushion rubber are directly formed on a molding former is proposed in Patent Document 1 and the like.

  In the said patent document 1, as shown in FIG. 7, the said conveyance tape of the rubber conveyance apparatus d which wound the rubber strip b extruded from the rubber extruder a so that a non-extensible conveyance tape c could be wound. an accumulator part f that folds the rubber strip b received from the rubber extruder a in a zigzag shape and temporarily stores it in the conveying device d; An applicator h having a feed roller g for feeding the rubber strip b to the molding former e. Then, the rubber strip b from the feed roller g is spirally wound on the rotating molding former e by moving the applicator portion h in the axial direction (perpendicular to the paper surface). paste.

  In this transport device d, since the applicator part h moves laterally in the axial direction, the transport tape c is twisted or pulled between the accumulator part f and the applicator part h. Since b is adhesively held on one surface of the transport tape c, the rubber strip b is not deformed by the twisting or pulling, and can be transported with high accuracy.

  However, this uses the adhesive strength of the rubber strip b to adhere the rubber strip b to the transport tape c. Accordingly, the rubber strip b having a low adhesive force cannot form a tire rubber member using such a conveying device d. Further, during the conveyance, the rubber strip b is adhered and restrained by the conveyance tape c, so that the shrink (shrinkage) of the rubber strip occurs after being wound around the molding former e. As a result, the strip wound body (tire rubber member) i is gradually deformed by the shrink, causing a dimensional change and a shape change, and the wound portion of the rubber strip b is cut by the shrink.

  Therefore, the present inventor transports only the applicator portion by the transport tape, and holds only the rubber strip in a U shape between the applicator portion and the rubber extruder without using the transport tape. Proposed to form a free festoon (not shown). In this case, since shrinkage occurs in the free festoon portion, shrinkage after winding is reduced, and dimensional changes and shape changes can be suppressed to some extent.

  However, since the applicator is affected by twisting and pulling due to lateral movement, the shrinkage and the thickness and width of the rubber strip are not stable, and there is sufficient variation in the dimensions of the strip wound body within the same lot. The result is not satisfactory.

JP 2000-246812 A

The invention according to claim 1 of the present invention is for a tire comprising a wound body of the rubber strip by winding a long tape-shaped rubber strip spirally on a cylindrical molding former and pasting it. A method of manufacturing a rubber member for a tire for forming a rubber member, wherein a rubber strip that is sequentially supplied while being extruded by a rubber strip supply means is guided by a guide roller including a feed roller on the front end side in the conveying direction so as to be able to circulate. And using an applicator including a conveyor having a conveyor belt, and feeding the molding former from the feeding roller side to the molding former, and moving the molding former in the axial direction while rotating. For rubber tires, affixing rubber strips from the conveyor while spirally winding A winding step for forming a rubber member, and an applicator that moves from a lowered position where the conveyor approaches the molding former and affixes the rubber strip to the molding former, and the conveyor waits while being spaced upward from the molding former. A tire rubber member removing step for removing the tire rubber member formed on the molding former, and winding the rubber strip in a U-shape between the rubber strip supply means and the applicator. A rotatable free roller to be mounted, and the free roller moves up and down in synchronization with the up-and-down movement of the applicator accompanying the tire rubber member removing step. It is characterized by keeping the distance between the two constant .

The invention of claim 2, wherein the conveying speed V2 of the rubber strip by said conveyor is 70 to 100% of the rubber strip feed speed V1 from the rubber strip supply means, and said rubber strip, the it is a manufacturing method of claim 1 tire rubber member, wherein the conveyed without slackening between the free rollers and conveyor.

According to a third aspect of the present invention, there is provided a tire rubber member comprising a wound body of a rubber strip by attaching a long tape-like rubber strip in a spiral form on a cylindrical molding former. An apparatus for manufacturing a rubber member for a tire to be formed, and a conveyor belt guided so as to be circulated by a rubber strip supply means for sequentially supplying the rubber strip while extruding and a guide roller including a feed roller on the front end side in the conveyance direction An applicator including a conveyor for receiving the rubber strip from the rubber strip supply means and feeding the rubber strip from the feed roller side to the molding former on the conveyor belt, the molding former, the rubber strip supply means, and the application Rotating freero that is placed between the two and wound around a U-shaped rubber strip Comprising a color, wherein said applicator, between the lowered position where the conveyor paste the rubber strip close to the molding former to the molding former, to a raised position in which said conveyor is waiting spaced upwardly from the forming former The free roller is moved up and down in synchronization with the up and down movement of the applicator to keep the distance between the applicator and the free roller constant, and the molding former is rotated. While the rubber strip from the conveyor is spirally wound by laterally moving in the axial direction, the tire rubber member manufacturing apparatus is characterized.

  The method for manufacturing a rubber member for a tire according to the present invention receives a rubber strip that is sequentially supplied while being extruded by a rubber strip supply means, using a conveyor having a conveyor belt, and sends the rubber strip to a molding former. A winding step of forming a rubber member for a tire by attaching the rubber strip while spirally winding on a molding former by laterally moving in the axial direction while rotating is provided.

  In other words, since the molding former is laterally moved in the axial direction, the rubber strip extruded from the rubber strip supply means is not laterally moved until it is wound around the molding former. As a result, the influence of twisting and pulling is reduced, the shrinkage amount is stabilized, and it is possible to suppress the occurrence of dimensional variation or cutting in the strip wound body within the same lot.

It is a side view of the manufacturing apparatus of the rubber member for tires which shows the embodiment of the present invention. FIG. It is a left half sectional view of the tire fabricated by the present invention. It is the schematic of the manufacturing method of the rubber member for tires which shows embodiment of this invention. It is a perspective view of a rubber strip. It is the schematic of the manufacturing apparatus of the rubber member for tires which shows other embodiment of this invention. It is a side view of the manufacturing apparatus of the rubber member for tires which shows a prior art example.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2, a tire rubber member manufacturing apparatus 1 has a long tape-shaped rubber strip P made of unvulcanized rubber wound in a spiral shape on a cylindrical molding former 4 and attached. This is a manufacturing apparatus for forming the rubber member P1 for a tire made of a wound body of the rubber strip P. In the present embodiment, the tire rubber member manufacturing apparatus 1 constitutes a part of a production line for manufacturing the tire T.

  As shown in FIG. 3, the tire T has a plurality of types such as an inner liner rubber Ga, a sidewall rubber Gb, a chafer rubber Gc, a breaker cushion Gd, and a tread rubber Ge in addition to a cord layer such as a carcass A1 and a breaker A2. The rubber member G is used. And the said rubber manufacturing apparatus 1 forms the said inner liner rubber Ga, the side wall rubber Gb, the chafer rubber Gc, and the breaker cushion Gd on the shaping | molding former 4 one by one by winding of the rubber strips Pa-Pd of a different rubber | gum compound, Used to form a cylindrical green tire before shaping.

Moreover, the manufacturing method of the rubber member for tires of the present invention is conceptually shown in FIG.
(1) A rubber strip P that is sequentially supplied while being extruded by the rubber strip supply means 2 has a conveyor belt 5 that is guided so as to be able to go around by a guide roller 6 including a feed roller 6a on the front end side in the conveyance direction. And then fed from the feed roller 6a side to the molding former 4, and the molding former 4 is moved laterally in the axial direction while rotating. The rubber strip P is attached while being spirally wound on the molding former 4 to form a rubber member P1 for a tire, and a winding step K1.
(2) The applicator 3 waits while the conveyor 7 approaches the molding former 4 and the conveyor 7 is spaced upward from the molding former 4 from a lowered position S1 where the rubber strip P is attached to the molding former 4. A tire rubber member removing step K2 for removing the tire rubber member P1 formed on the molding former 4 after being moved up to the raised position S2 is provided.

  In this example, a rotatable free roller 16 for winding the rubber strip P around a U-shape is disposed between the rubber strip supply means 2 and the applicator 3. The free roller 16 moves up and down in synchronization with the up-and-down movement of the applicator 3 that accompanies the tire rubber member removal step. Thereby, the distance between the applicator 3 and the free roller 16 is kept constant.

  The rubber strip conveyance speed V2 by the conveyor 7 is in the range of 70 to 100% of the rubber strip supply speed V1 from the rubber strip supply means, and the rubber strip P is connected to the free roller 16 and the conveyor. It is conveyed without slacking between the two.

  As shown in FIG. 1, the tire rubber member manufacturing apparatus 1 (hereinafter also referred to as the manufacturing apparatus 1) includes a rubber strip supply means 2 that sequentially supplies the rubber strip P while extrusion molding, and a conveying direction. It has a conveyor belt 5 that is guided by a guide roller 6 including a feed roller 6a on the foremost end side so as to be able to circulate, and receives the rubber strip P from the rubber strip supply means 2 on the conveyor belt 5 and the feed roller An applicator 3 including a conveyor 7 fed from the side 6a to the molding former 4, a rotatable free roller 16 winding a rubber strip P in a U-shape between the rubber strip supply means 2 and the conveyor 7, and the molding At least a former 4.

  The rubber strip supply means 2 includes a rubber extruder 10 having a screw 10A, a roller head 11 having upper and lower calendar rollers 11U and 11L arranged on the discharge side of the rubber extruder 10, and a downstream side of the roller head 11. And a guide roller 12 disposed on the side.

  In this example, the rubber extruder 10 is a constant volume extruder having a gear pump 10C at the front end, and the rubber pumped in from the rubber inlet 10B and kneaded by the screw shaft is quantified by the gear pump 10C. Can be extruded. The rubber extruder 10 operates intermittently in accordance with the formation cycle of the tire rubber member P1, and forms the rubber strip P only when necessary.

  The roller head 11 is further molded between the calender rollers 11U and 11L by molding a pre-formed rubber which is kneaded by screw rotation and pre-formed from the discharge port 10D of the rubber extruder 10 so as to have a thinner desired size. Extruded into a rubber strip P. As the roller head 11, it is preferable to use a molding roller that matches the cross-sectional shape of the rubber strip P.

  The guide roller 12 is a well-known peeling roller that peels the rubber strip P extruded by the roller head 11 from the calender roller 11L and delivers it to the applicator 3, and has a circumferential speed substantially equal to that of the calender rollers 11U and 11L. It is driven by. In the present embodiment, two guide rollers 12 having the same shape are provided in series 12a and 12b, and the delivery of the peeled rubber strip P is stabilized.

  As shown in FIG. 5, as the rubber strip P, one having a thickness T1 of, for example, about 0.5 to 4.0 mm and a width W1 of, for example, about 12 to 35 mm is preferably used. Various changes can be made according to the shape size of the rubber member P1.

  Further, as conceptually shown in FIG. 4, the applicator 3 includes a conveyor belt 5 that is guided so as to be able to go around by a guide roller 6 including a feed roller 6 a on the foremost end side in the conveyance direction. 5 includes at least a conveyor 7 that receives the rubber strip P from the rubber strip supply means 2 and transports it to the feed roller 6 a side and sends it to the molding former 4. A holding belt J having a width smaller than that of the rubber strip P is provided on the upper portion of the conveying belt 5, and the rubber strip P is conveyed while being sandwiched between the holding belt J and the conveying belt 5. Yes. The conveyor belt 5 and the presser belt J have non-adhesiveness that is excellent in peelability from the rubber strip P, and the rubber strip P is not peeled off from the conveyor belt 5 when being fed to the molding former 4. The belt 5 is prevented from being rewound together. This also has the advantage that even a rubber strip P with low adhesive strength can be easily conveyed to the molding former 4. As the non-adhesive treatment, for example, the surface of the conveyor belt 5 is coated with a resin such as nylon, polyester, Teflon (trademark of DuPont). And / or what provides uneven | corrugated patterns, such as a satin shape, on the belt surface is mentioned.

  In the applicator 3 of the present embodiment, a case is shown in which a guide roller 15 that guides the rubber strip P fed from the guide roller 12 to the conveyor 7 is disposed on the upstream side of the conveyor 7. The guide roller 15 is disposed in the vicinity of the conveyor 7, and its upper edge is set to be substantially the same height as the upper surface of the conveyor 7.

  As shown in FIG. 1, the applicator 3 including the conveyor 7 of the present invention has a descending position S1 where the feed roller 6a of the conveyor 7 approaches the molding former 4 and affixes the rubber strip P to the molding former 4. The raising and lowering movement F is held by appropriate raising and lowering means K using, for example, a cylinder or the like between the feeding roller 6a of the conveyor 7 and the ascending position S2 where the feeding roller 6a is separated from the molding former 4 and waits. That is, the applicator 3 can remove the tire rubber member P1 by the up-and-down movement F, and can stick the rubber strip P with the conveyor 7 being close to the molding former 4 at, for example, 20 mm or less. , Can improve the accuracy of pasting. On the other hand, the applicator 3 including the conveyor 7 does not move in the width direction of the rubber strip P. In other words, the transport movement of the rubber strip P by the rubber strip supply means 2 and the applicator 3 can be moved only in the length direction of the rubber strip P toward the forming former 4 and is not moved in the width direction. For this reason, since the rubber strip P is less susceptible to twisting and stress in the width direction in the conveying state, the dimensional change and shape change of the rubber strip P are reduced, and the formation accuracy of the tire rubber member P1 is improved. Can do.

  In the manufacturing apparatus 1, the shrinkage after forming the wound body is reduced between the guide roller 12 and the conveyor 7, in this example, between the guide roller 12 and the guide roller 15 by reducing the internal stress of the rubber strip P. A region Y to be suppressed is formed. In this example, as the region Y, a case where a rotatable free roller 16 is disposed between the guide roller 12 and the guide roller 15 and a rubber strip is wound around a U-shape is shown.

  In the case of this example, the conveyance speed V2 of the rubber strip P by the conveyor 7 is equal to or less than the supply speed V1 of the rubber strip P from the rubber strip supply means 2, and between the free roller 16 and the guide roller 15. The rubber strip P is conveyed without sagging. In the region Y, since the belt is not restrained by the conveyor belt 5, a contraction force is generated on the rubber strip P to shrink. Accordingly, the rubber strip P can be transported without slackening while satisfying V2 ≦ V1. When V2 <V1, shrinkage can be generated in the rubber strip P by an amount corresponding to the speed difference, and shrinkage itself after forming the wound body can be suppressed. In particular, in the case where a compound rubber having a large shrinkage such as natural rubber is used for the rubber strip P, the conveyance speed V2 is reduced to 70 to 100% of the supply speed V1 within a range where the rubber strip P does not loosen. It is preferable to generate as much shrink as possible. Further, since the rubber strip P is not slackened, it is possible to generate shrinkage in the length direction, and to suppress the dimensional variation of the rubber strip P due to the variation in the amount of shrinkage. If the region Y is too small, the above-described effects cannot be exhibited sufficiently. Conversely, if the region Y is too large, there is an adverse effect due to the weight of the rubber strip P. Therefore, the distance between the free roller 16 and the guide roller 15 is preferably in the range of 40 to 80 mm.

  In this embodiment, since the conveyor 7 can be moved up and down, the rubber strip P extends between the conveyor 7 and the free roller 16 when the applicator 3 including the conveyor 7 is lifted in the tire rubber member removing process. May occur, and the rubber strip P may change in size or shape. Therefore, in this example, the free roller 16 is supported so as to be movable up and down in synchronization with the vertical movement of the conveyor 7. Thereby, the distance between the conveyor 7 and the free roller 16 can be kept constant, and the dimensional change or the like of the rubber strip P caused by the up-and-down movement of the conveyor 7 can be prevented.

  The free roller 16 can be moved up and down by a known means such as a screw shaft system or a piston cylinder system.

  Further, the molding former 4 moves in the axial direction while rotating, whereby the rubber strip P from the feed roller 6a is spirally wound to form a tire rubber member.

  Here, the molding former 4 has a cylindrical shape, and is pivotally attached to a traveling table 19 movable in the axial direction as shown in FIGS. The molding former 4 is rotationally driven at a predetermined rotational speed by a motor M1 fixed to the traveling table 19.

  The traveling table 19 is driven by the traveling means 22 and moves in the axial direction by a distance corresponding to the helical pitch while the molding former 4 makes one rotation. In this example, as the traveling means 22, as shown in FIGS. 1 and 2, a screw shaft 24 that extends in the axial direction and is rotatably supported at both ends, and a pair of the screw shafts 24, for example, are laid in parallel. The motor M2 is connected to the screw shaft 24. Further, the traveling table 19 includes a linear bearing 25 guided by the rail 23 and a female screw portion screwed into the screw shaft 24.

  Thereby, by driving the motors M1 and M2, the molding former 4 moves laterally while rotating, thereby restraining the movement of the rubber strip P on the outer peripheral surface of the molding former 4 while reducing the tension force. The rubber strip P from the conveyor 7 can be spirally wound with high accuracy while preventing the displacement in the axial direction. Thereby, the dimensional variation of the rubber member P1 for tires can be suppressed.

  In the present embodiment, the tire rubber member manufacturing apparatus 1 includes, as schematically shown in FIG. 4, one rubber strip supply means 2 for extruding the rubber strip P to one molding former 4, and Although one applicator 3 for conveying the rubber strip P is provided, a plurality of rubber strip supply means 2 and a plurality of applicators 3 may be provided for one molding former 4. Thereby, the improvement of production efficiency can be aimed at.

  In addition, it goes without saying that the tire rubber member manufacturing apparatus 1 of the present embodiment is provided with a known rubber cutting device (not shown) for cutting the rubber strip P every time the tire rubber member P1 is formed. .

  In FIG. 6, a free festoon portion 18 is formed in a region Y between the guide roller 12 and the conveyor 7. An embodiment is shown. Also in this aspect, the rubber strip P is stuck by the lateral movement of the molding former 4 in the axial direction. In the free festoon portion 18, the rubber strip P is free without being restrained, and can be freely shrunk. Therefore, prior to the conveyance by the conveyor 7, the rubber strip P can be given the shrinkage required by the rubber strip P. Therefore, the rubber shrinkage after being conveyed (after forming the raw rubber product in this example) can be significantly suppressed.

  If the amount of slack of the rubber strip P in the free festoon portion 18 is too small, the rubber contraction is insufficient, and if it is excessive, an adverse effect due to the weight of the rubber strip P occurs. From this point of view, the horizontal distance L1 between the inner ends of the guide roller 12 and the conveyor 7 is preferably 200 to 600 mm, more preferably 250 to 350 mm, and the upper end of the conveyor 7 and the rubber strip P The vertical distance L2 between the lower end position R and the lower limit position R2 of the free festoon portion 18 is preferably 100 to 700 mm, more preferably 300 to 500 mm. It is desirable to control the amount of slack by providing a detecting means (not shown) for regulating the lower end position R of the free festoon portion 18 between the upper limit position R1 and the lower limit position R2.

  However, when the free festoon portion 18 is provided, the shrinkage of the rubber strip P on the molding former 4 is very small because the degree of shrinkage changes depending on the blending and blending lot, but for the tire after molding. There is a disadvantage that the mass error of the rubber member becomes very large (about 30% mass error depending on the formulation), and it is desirable to provide the free roller 16 in this respect.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the illustrated embodiments, and can be implemented in various forms.

In order to confirm the effect of the present invention, a rubber strip was formed by a manufacturing apparatus having the structure shown in the figure, and a tire rubber member (tire size 215 / 45R17) formed by winding the rubber strip was made as a trial product. .
The main common specifications are as follows.

Rubber strip width x thickness: 23 x 1.0 mm
Molding former diameter: 577mm
Molding former width: 320mm
Forming peripheral speed: 1500mm / s
The rubber composition of the rubber strip used is shown in Table 2. The numerical unit in this table is expressed in parts by mass.
The shrink rate of the rubber strip alone was calculated by measuring the length of the rubber strip immediately after cutting the rubber strip and after 60 minutes. Specifically, the rubber strip discharged from the rubber extruder was cut at a predetermined length with respect to the circumference of the guide roller, one of the cut rubber strips was fixed to the wall, and the other was suspended and measured. .
The test method is as follows.
The test results are shown in Table 1, and the composition of the tire rubber member is shown in Table 2. The rubber compounding A is a rubber having a small adhesive strength, and the rubber compounding B represents a rubber having a large adhesive strength. Moreover, the structure of the rubber member manufacturing apparatus of FIG. 6 of the comparative example 2 represents a conventional structure in which the applicator moves in the axial direction of the molding former using a free festoon and attaches a rubber strip.

<Conveyance accuracy>
The conveyance state of the rubber strip conveyed by the said apparatus is confirmed. The result that was able to be conveyed to the molding former was marked with ◯, and the result that the rubber strip was dropped from the conveying belt due to poor adhesion and could not be conveyed to the molding former was marked with ×.

<Mass error of tire rubber member>
Ten tire rubber members wound up by the above-mentioned apparatus were manufactured, and the mass was measured. A numerical value obtained by dividing the difference between the maximum mass and the minimum mass by the maximum mass is shown. The smaller the value, the better.

<Winding accuracy of rubber member for tire>
The rubber member for tire was confirmed visually. ○ when the winding state is good, and shrinkage rate (%) differed greatly from test to test, so △ 1 when the position shift occurred, and position shift due to slack in the Y region Δ was marked with Δ2, and Δ3 was marked when cracks were generated by shrinkage on the molding former.

  According to the test results, according to the present invention, the mass error of the tire rubber member is small, the winding accuracy of the tire rubber member is improved, and the tire rubber member can be manufactured regardless of the adhesive strength of the rubber strip. This proved to be a significant invention.

2 Rubber strip supply means 3 Applicator 4 Formation former 5 Conveying belt 6 Guide roller 6a Delivery roller 7 Conveyor K1 Winding process K2 Tire rubber member removing process P Rubber strip P1 Tire rubber member S1 Lowering position S2 Ascending position

Claims (3)

Manufacturing method of tire rubber member for forming tire rubber member formed of wound body of rubber strip by attaching long tape-like rubber strip spirally wound on cylindrical molding former Because
A rubber strip that is sequentially supplied while being extruded by the rubber strip supply means is received using an applicator including a conveyor having a conveyor belt that is guided by a guide roller including a feed roller on the front end side in the conveyance direction. And while feeding to the molding former from the feeding roller side, the molding former is laterally moved in the axial direction while rotating, so that the rubber strip from the conveyor is affixed while spirally wound on the molding former. Winding process for forming a tire rubber member,
The applicator is moved upward from a lowered position where the conveyor approaches the molding former and affixes the rubber strip to the molding former to an elevated position where the conveyor is spaced apart from the molding former and waits. A tire rubber member removing step for removing the tire rubber member formed thereon ,
Between the rubber strip supply means and the applicator, a rotatable free roller for winding the rubber strip in a U-shape is disposed, and the free roller is connected to the tire rubber member removing step. A method for producing a rubber member for a tire, characterized in that the distance between the applicator and the free roller is kept constant by moving up and down in synchronization with the up and down movement . The conveyance speed V2 of the rubber strip by the conveyor is in a range of 70 to 100% of the rubber strip supply speed V1 from the rubber strip supply means, and the rubber strip is slackened between the free roller and the conveyor. 2. The method for producing a tire rubber member according to claim 1, wherein the tire rubber member is conveyed without being conveyed . A tire rubber member manufacturing apparatus for forming a rubber member for a tire comprising a wound body of the rubber strip by winding a long tape-shaped rubber strip spirally on a cylindrical molding former and pasting the rubber strip. Because
Rubber strip supply means for sequentially supplying the rubber strip while extrusion molding;
A conveying belt guided by a guide roller including a feeding roller on the front end side in the conveying direction so as to be able to circulate, receives a rubber strip from the rubber strip supply means on the conveying belt, and forms a molding former from the feeding roller side; An applicator including a conveyor for delivery;
The molding former;
A rotatable free roller disposed between the rubber strip supply means and the applicator and wound around the U-shaped rubber strip;
The applicator is held up and down freely from a lowered position where the conveyor approaches the molding former and affixes the rubber strip to the molding former to an elevated position where the conveyor is spaced apart from the molding former and waits. And
The free roller moves up and down in synchronization with the up and down movement of the applicator, thereby maintaining a constant distance between the applicator and the free roller,
The forming former is rotated by the lateral movement in the axial direction while the rubber strip manufacturing apparatus features and to filter bad rubber member to be wound spirally from the conveyor.

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