CN1733457A - Manufacturing method of rubber member for tire - Google Patents
Manufacturing method of rubber member for tire Download PDFInfo
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- CN1733457A CN1733457A CN 200510089053 CN200510089053A CN1733457A CN 1733457 A CN1733457 A CN 1733457A CN 200510089053 CN200510089053 CN 200510089053 CN 200510089053 A CN200510089053 A CN 200510089053A CN 1733457 A CN1733457 A CN 1733457A
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- 238000004804 winding Methods 0.000 claims description 32
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- 239000003292 glue Substances 0.000 description 11
- 239000011324 bead Substances 0.000 description 8
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- 238000011156 evaluation Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
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- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
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- 238000000465 moulding Methods 0.000 description 2
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- 230000008439 repair process Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
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Abstract
The invention can reduce a step between rubber strips even in the case that the rubber strip is made thick, and inhibits a reduction of uniformity and tire quality, a deterioration of a tire outer appearance, and the like. A rubber strip ( 10 ) may be scalene triangular shape, a trapezoidal shape or a parallelogram shape having has a bottom line ( 11 ) forming a strip width (W), a first diagonal line ( 12 ) extending from one end of the bottom line ( 11 ) and a second diagonal line ( 13 ) extending from the other end (P 2 ) of the bottom line ( 11 ), a length (L 0 ) of the bottom line is set to 5 to 50 mm, and a thickness (T) thereof is set to 0.2 to 5.0 mm.
Description
Background technology
The present invention relates to the manufacture method of rubber member for tire, it is realized by along the circumferential direction overlapping with spiral form and twining rubber strip.
In pneumatic tire, use to form and the shape of cross section various rubber assemblies of differentiation according to the desirable characteristics of used part and to some extent, described used part is for example tread rubber, sidewall rubber, extruding glue (clinch rubber), skid glue, interior line with rubber etc.Traditionally, will be according to the required shape of cross section of each rubber assembly formed body by extrusion moldings such as Rubber Extruders as rubber assembly.In the green tire forming step, each rubber assembly twines a circle by the sheet-like formed body that will be cut into fixed length and forms on assembly drum or similar installation.
On the contrary, in recent years, shown in Figure 10 (A), the someone proposes a kind of so-called band and twines method (strip windmethod), forms rubber assembly c by along the circumferential direction overlapping with spiral form and twining rubber strip.Japanese Laid-Open Patent Application 2000-94542, Japanese Laid-Open Patent Application 2002-187219, Japanese Laid-Open Patent Application 2003-104013 etc. have proposed above-mentioned suggestion.In this band winding method, form the band winding body b similar to the shape of cross section of rubber assembly c by twining rubber strip (a).This figure describes the situation that rubber assembly (c) is used for sidewall rubber.According to this method, owing to do not need large-sized Rubber Extruder, and do not need to store and be used for the rubber assembly formed body as interim stock, therefore advantage except productivity ratio can be provided, especially for plurality of specifications and for the tire of small-scale production, can save the space like this, or the like.
On the other hand, in band winding method, twining rubber strip needs the time.Therefore,, can consider to use to have big sectional area and thick rubber strip (a), to reduce writhing number in order to have a mind to boost productivity.Yet, make the rubber strip thickening increase the jump (k) that band twines body (winding body) surface, as Figure 10 (B) with shown in the amplification form.In addition, being increased between rubber assembly (c) and adjacent other rubber assemblies (c), metal sulphide mould, the capsule etc. of jump (k) produces gas remnants.They cause uniformity and tire quality to descend.And they form cut at surface of tyre, and cause the tire degraded appearance.In addition, thicken and make tire be difficult to obtain to have the rubber assembly of required shape of cross section, thereby make the free degree variation of the formed precision and the forming shape of rubber assembly.
Summary of the invention
Therefore, the present invention is based on use and have the band of non-rectangle shape of cross section as rubber strip.Therefore, an object of the present invention is to provide a kind of manufacture method of rubber assembly, it can solve by thickening the problem that is caused in the conventional method, that is: uniformity and tire quality decline, tire degraded appearance, rubber assembly formed precision and the forming shape free degree reduce, or the like, attempt to improve the productivity ratio of rubber assembly simultaneously.And manufacture method of the present invention can reduce the jump between the rubber strip.
In manufacture method of the present invention, the shape of cross section of rubber strip can be scalene triangle, trapezoidal or parallelogram, it has the base that forms strip width W, first hypotenuse that extends one end from the base and extension second hypotenuse from base other end P2, the length L 0 on base is set at 5-50mm, and its thickness T is set at 0.2-5.0mm.
Description of drawings
Fig. 1 is the sectional view that the pneumatic tire embodiment of the rubber assembly that uses method manufacturing constructed in accordance is described;
Sectional view when Fig. 2 (A) is explanation rubber strip formation tread rubber (rubber assembly);
Fig. 2 (B) is the figure of explanation rubber strip winding direction;
Fig. 3 (A) is the sectional view of explanation rubber strip embodiment;
Fig. 3 (B) is the amplification sectional view on explanation rubber strip summit;
Fig. 4 is the sectional view of explanation the present invention operation;
Fig. 5 is the sectional view when illustrating rubber strip formation sidewall rubber (rubber assembly);
Fig. 6 (A) and 6 (B) are the sectional views that other embodiments of rubber strip are described respectively;
Fig. 7 (A) and 7 (B) are that explanation has the sectional view that trapezoidal cross sectional shape and rubber strip have the situation lower end overlapping part forming method of parallelogram shaped cross section shape at rubber strip;
Fig. 8 (A) and 8 (B) sectional view that to be explanation have the part that overlaps under the situation that trapezoidal cross sectional shape and rubber strip have the parallelogram shaped cross section shape at rubber strip;
Fig. 9 is the sectional view of other winding methods of explanation rubber strip; With
Figure 10 (A) and 10 (B) are the sectional views of the traditional winding arrangement of explanation.
The specific embodiment
Below will be to being described together with the diagram embodiment according to embodiment of the present invention.Fig. 1 is the sectional view of the pneumatic tire embodiment of explanation method manufacturing constructed in accordance.
In Fig. 1, the pneumatic tire 1 of formation has cord reinforcement, comprises carcass 6 that forms tyre framework and the belt 7 that is configured in fetus face 2 inboards and carcass 6 radial outsides.In addition; pneumatic tire 1 provides the wherein different multiple rubber assembly G of rubber composition; and rubber assembly G can comprise the tread rubber G1 that is configured in the fetus face 2 and forms earthed surface; be configured in the sidewall portion 3 and form the sidewall rubber G2 of outer surface of tire; it is inboard and form the interior line with rubber G3 in tire chamber to be configured in carcass 6; be configured in the bead part 4 and prevent extruding glue (clinch rubber) G4 of wheel rim wearing and tearing; be configured in belt 7 two ends and link to each other with carcass 6 and protect the band bundle pad glue G5 in the belt outside and extend to the tyre bead triangle glue G6 of radial outside from bead core 5.
Carcass 6 is made of one or more layers casingply, and wherein body cord is arranged with the angle of the circumferential precedent of relative tire such as 70-90 °, and carcass 6 is made of one deck casingply 6A in the present embodiment.Casingply 6A provides the casing ply turnup part 6b around bead core 5 turnups continuously in the both sides of casing ply main part 6a, casing ply main part 6a extends to the bead core 5 of bead part 4 via sidewall portion 3 from fetus face 2.
In addition, belt 7 is made up of two-layer or multilayer belt cord, wherein belt cord is arranged with the angle with respect to the circumferential precedent of tire such as 10-35 °, use two-layer belt cord 7A and 7B in the present embodiment, and belt cord intersects between the belt cord mutually, thereby improves belt rigidity and firmly strengthen fetus face 2.In this case, can provide one deck restraint layer (band) 9 in the outside of belt 7, wherein the restraint layer cord mainly is in order to improve the performance of running at high speed along the tire circumferential array.
In addition, at least a among the rubber assembly G1-G6 twined body (band winding body) Ga according to the utilization of band winding method and forms.In Fig. 2, rubber assembly G constitutes tread rubber G1, and tread rubber G1 utilizes and twines body G1a formation.Twining body G1a forms by along the circumferential direction overlapping successively in a spiral manner and twining half finished rubber bar 10.In this case, Fig. 2 exemplarily illustrates winding gap between the rubber strip 10 in the mode of amplifying substantially.After in the recess Da along the circumferential direction that assembly drum D outer surface provides, forming belt 7 and restraint layer 9 successively, can be with the external peripheral surface of assembly drum (former) D and the external peripheral surface planarization of restraint layer 9, as shown in Figure 2.The winding body G1a that is used for tread rubber G1 can form by twining rubber strip 10 at smooth external peripheral surface.In this case, described structure is not limited to string course 7 and restraint layer 9 as mentioned above and is disposed at structure among the recess Da.
In addition, according to the present invention, shown in Fig. 3 (A), rubber strip 10 forms leg-of-mutton shape of cross section.Use this rubber strip 10 can increase the productivity ratio of the cross-sectional area and the raising rubber assembly G of rubber strip 10.And, can improve the uniformity of tire, prevent that tire quality from descending and the tire degraded appearance, and the decline of the minimizing rubber assembly G formed precision and the forming shape free degree.
Can make thickness T bigger, so that increase cross-sectional area.In addition, with shown in the amplification mode, compare (representing), can reduce the jump K between adjacent rubber strip 10 and 10 with chain-dotted line with traditional jump K ' as Fig. 4.And overlapping part 10a can form taper, and can be easily along adjacent rubber strip 10 distortion.Therefore, can form winding body Ga, reduce writhing number simultaneously, to boost productivity with smooth exterior surface face shape.Therefore, can prevent the decline of tyre evenness and tire quality, tire degraded appearance or the like.Particularly, because " inequilateral " shape can make overlapping part 10a sharp-pointed, so it is used to make external surface shape level and smooth.And tapering part is easily deformable, and can remove residual air effectively.
In addition, in the rubber assembly G of tire each several part, existing needs at least one end to form the sharp edges shape, i.e. the situation of tapered cross-section shape.Because rubber strip 10 forms above-mentioned " inequilateral " shape, the tapering of rubber strip 10 ends can be very little, so that make rubber strip 10 easy deformation.Therefore, can make things convenient for and accurately prepare the rubber assembly G that the end forms taper.
Have in formation under the situation of the rubber assembly G of both sides symmetrical section such as tread rubber G1, use shape of cross section for example to be first and second rubber strip 10A and the 10B of line symmetry, as shown in Figure 2 with respect to RADIAL.Particularly, the first rubber strip 10A twines to the winding final position A2 that approaches other end Eb from the winding original position A1 that approaches rubber assembly G one end Ea.And the second rubber strip 10B twines to the winding final position B2 that approaches an end Ea from the winding original position B1 that approaches rubber assembly G other end Eb.In winding process, the first and second rubber strip 10A and 10B radially pass near tire equator mutually.And an end P1 on first rubber strip and the second rubber strip 10A and 10B base 11 separately is all outside winding original position A1 and B1 place points in axial direction separately.Therefore, form that two ends Ea and Eb form the sharp edges shape, " passing mutually " with winding body G1a of bilateral symmetry side (profile) is arranged in two ends with original position A1 and the B1 of the first and second rubber strip 10A and 10B, and rubber strip 10A and 10B are intersected mutually and do not offset, so that process on another wherein.In other words, twining original position A1 is different with B1 phase place along the circumferential direction, preferred 90 ° or bigger, and for example about 180 °.Therefore, can prevent that the supply line of rubber strip 10A and 10B is as intersecting from axially seeing.In this case, it is the line symmetry that rubber strip 10A and 10B there is no need itself, and can select the different non-line symmetric shape of left and right sides part as required.
As mentioned above, the length L 0 on base 11 is set at and is equal to or greater than 5mm and is equal to or less than 50mm, and its thickness T is equal to or greater than 0.2mm and is equal to or less than 5.0mm.And 11 length L 1 is set at greater than 0.5 times and is equal to or less than 0.8 times base length L0 first hypotenuse 12 along the base.
In this case, when length L 0 less than 5mm and thickness T during less than 0.2mm, cross-sectional area is too little, so that the effect that improves rubber assembly G productivity ratio can not fully realize.In addition, when length L 0 greater than 50mm and thickness T during greater than 5.0mm, the free degree variation of forming shape, so that it is limited to twine the plastic shape of cross section of body, and cause formed precision to reduce, thus enlarged and required shape of cross section between shape difference.Therefore, preferably adopt length L 0 to be 15-40mm, and the thick T of bar is set at 0.8-3.0mm.In this case, the ratio T/L0 between length L 0 and the thickness T is preferably set to 0.02-0.2.
The ratio L1/L0 between length L 1 and the length L 0 greater than 0.8 situation under, the shape of cross section of rubber strip 10 tends to reduce moulding freedom shape and formed precision.Therefore, more preferably ratio L1/L0 in the 0.6-0.7 scope.
In addition, in rubber strip 10, if each the summit P1-P3 in the cross section is too sharp, rubber strip 10 tends to distortion so, and shape stability is relatively poor.In addition, the risk that exists rubber assembly G formed precision to reduce.
Therefore, shown in Fig. 3 (B) of exemplary illustration summit P1, preferably be that the circular arc of 0.2-1.0mm forms each summit P1-P3 with the radius r.
In this case, this embodiment exemplary illustration forms the situation of tread rubber G1.Yet the present invention can be used for forming various rubber assembly G such as sidewall rubber G2, interior line with rubber G3, extruding glue G4, band bundle pad glue G5 and tyre bead triangle glue G6.
Fig. 5-9 exemplary illustration forms the situation of the sidewall rubber G2 among the rubber assembly G1-G6 according to band winding method.Be schematically shown as Fig. 2, unvulcanized rubber strip 10 along the circumferential direction overlaps successively with spiral form and is wrapped in around the former D, is formed for forming the winding body G2a of sidewall rubber G2.
According to the present embodiment, rubber strip 10 forms trapezoidal cross sectional shape or parallelogram shape, shown in Fig. 6 (A) and 6 (B).Therefore, can prevent that tyre evenness and tire quality from descending and the tire degraded appearance.
Particularly, rubber strip 10 has the base 11 that forms the wide W of bar at its cross section, extends the one end P1 from the base so that first hypotenuse 12 that stops and extend 11 other end P2 from the base so that second hypotenuse 13 that stops.
In addition, in Fig. 6 (A), the angle [alpha] that forms between first hypotenuse 12 and the base 11 in the rubber strip 10 is set at greater than 45 ° and is equal to or less than 80 °.And the angle beta that forms between second hypotenuse 13 and the base 11 is set at greater than 45 ° and is equal to or less than 80 °.In addition, in the present embodiment,, make rubber strip 10A form trapezoidal in the present embodiment by connect the terminal point of first and second hypotenuses 12 and 13 with the last base 14 that is parallel to base 11.In addition, first and second hypotenuses 12 and 13 form the pointed cone part Sa and the Sb of tapers, and it has conical in shape separately and is formed by first hypotenuse and second hypotenuse 12,13 and base 11.
Under the situation shown in Fig. 6 (B), the angle [alpha] between first hypotenuse 12 and the base 11 is set at greater than 45 ° and is equal to or less than 80 °.And the angle beta between second hypotenuse 13 and the base 11 is set at and is equal to or greater than 100 ° and less than 135 °.In addition, by connect the terminal point of first and second hypotenuses 12 and 13 with the last base 14 that is parallel to base 11 in the present embodiment, make rubber strip 10B form parallelogram in the present embodiment.This rubber strip 10B also forms pointed cone part Sa and Sb respectively.
Therefore, preferably adopt length L 0 to be 15-40mm, and the thick T of bar is set at 0.8-3.0mm.In this case, the ratio T/L0 between length L 0 and the thickness T is preferably set to 0.02-0.2.
In this case, in each rubber strip 10A and 10B, the length L 0 on base 11 (corresponding to the wide W of bar) is set at and is equal to or greater than 5mm and is equal to or less than 50mm, and thickness T is set at and is equal to or greater than 0.2mm and is equal to or less than 5.0mm.
During winding, rubber strip 10 is formed on the overlapping part J of second hypotenuse 13 of first hypotenuse 12 of overlapping rubber strip 10 on the width and adjacent rubber strip 10, shown in Fig. 7 (A) and 7 (B).Set overlapping part J with the end that overlaps, thereby form overlapping end Ja, wherein 11 width W j is equal to or greater than 0.8 times and be equal to or less than 1.2 times of mean value L to first hypotenuse 12 and second hypotenuse 13 11 a of length L separately and Lb (shown in Figure 6) along the base (=(La+Lb)/2) along the base.Above-mentioned winding is used to form the rubber assembly of sheet.Therefore, except the major part of above-mentioned sidewall rubber G2, base portion G1A of line with rubber G3, tread rubber G1 or the like in also can being used to form effectively.
As mentioned above, respectively by first hypotenuse 12 and base 11 and second hypotenuse 13 and tapered separately pointed cone part Sa and the Sb of base 11 formation.Therefore, among the Ja of overlapping end, have at rubber strip 10 under the situation of trapezoidal shape, the pointed cone part Sa of the rubber strip 10A that will the back be twined by the pointed cone part Sb of the rubber strip 10A that twines earlier is joined together when making its distortion, shown in Fig. 7 (A).Therefore, compare with the situation that the rubber strip with simple rectangular shape overlaps in the end, the height of this overlapping end Ja is littler.
As a result, can make the contour shape of rubber assembly G level and smooth.In addition, can prevent that jump and gap from forming, and can prevent that tyre evenness and tire quality from descending and the tire degraded appearance.
In addition, have at rubber strip 10 under the situation of parallelogram shape, near because the pointed cone part Sb second hypotenuse 13 of the rubber strip 10B that elder generation twines, be joined together when being out of shape with near first hypotenuse, the 12 pointed cone part Sa of the back rubber strip 10B that twines, shown in Fig. 7 (B), can prevent equally that therefore jump and gap from forming.
Operation above-mentioned and effect even can under the situation that rubber strip 10 thickens, realize, and the upper limit of thickness T can be brought up to 4.0-6.0mm, preferred 5.0mm, this thickness is greater than conventional method.
In this case, as the width W j of overlapping end Ja during, exist the gap to become the tendency of big and bond strength variation less than 0.8 times of mean value L.On the contrary, if should be worth, will cause the increase of jump greater than 1.2 times.
In addition, be under the trapezoidal situation, angle [alpha] and β will make pointed cone part Sa and Sb be difficult to distortion greater than 80 °, and will be difficult to prevent the formation in jump and gap.In addition, will be difficult to fully guarantee the width W j of overlapping part Ja.On the contrary, if angle [alpha] and β are equal to or less than 45 °, so, pointed cone part Sa and Sb easy deformation are difficult to control rubber strip 10 when extrusion molding, transportation and winding rubber strip 10, cause product percent of pass and productivity ratio to descend.
In addition, under the situation that is parallelogram, if when angle [alpha] is equal to or less than 100 ° greater than 80 ° and angle beta, pointed cone part Sa and Sb are difficult to distortion, and are difficult to prevent that jump and gap from forming.And, will be difficult to fully guarantee the width W j of overlapping end Ja.On the contrary,, angle [alpha] is equal to or greater than 135 ° if being equal to or less than 45 ° and angle beta, so, pointed cone part Sa and Sb easy deformation, and the situation when being trapezoidal is identical, can cause the reduction of production efficiency.
Be that the lower limit of angle [alpha] and angle beta is preferably set to and is equal to or greater than 47.5 °, more preferably is equal to or greater than 50 °, and its higher limit is preferably set to and is equal to or less than 75 °, more preferably is equal to or less than 70 ° under the trapezoidal situation.In addition, under the situation that is parallelogram, the lower limit of angle beta is preferably set to and is equal to or greater than 105 °, more preferably is equal to or greater than 110 °, and its higher limit is preferably set to and is equal to or less than 132.5 °, more preferably is equal to or less than 130 °.
In addition, deform when moulding, transportation and the winding in order to prevent rubber strip 10, preferably utilizing radius in the mode identical with above-mentioned embodiment is that the circular arc of 0.2-1.0mm forms pointed cone part Sa in the rubber strip 10 and the front end of Sb.Have under the situation of the acute angle that is equal to or less than 45 ° at pointed cone part Sa and Sb, be difficult to keep circular arc, it is unstable that inclined plane shape just becomes.And, because pointed cone part Sa and the easy deformation of Sb own even therefore front end forms circular arc, can not fully realize the anti-deformation effect.
In addition,, shown in Fig. 8 (A) and 8 (B), can make width W j 1.2 times greater than mean value L according to the present invention, and can twine rubber strip 10 and simultaneously on the base 11 and 14 overlapping places, last base have wide overlapping part Jb.In these cases, the contour shape of rubber assembly G becomes smoothly, and can prevent that jump and gap from forming.
In addition, Fig. 9 illustrates another embodiment of utilizing rubber strip 10 to form the manufacture method of rubber assembly.Use has the rubber strip 10 of trapezoidal cross sectional shape.Use two kinds to be respectively radially toward the outer side the second rubber strip 10A2 radially of base 11 towards the first rubber strip 10A1 of inboard and base 11.The second rubber strip 10A2 is wrapped in the gap between screw part 20 that forms between the first adjacent rubber strip 10A1 on width.According to this winding method,, therefore be easy to engage because the second rubber strip 10A is fit to gap portion 20 under pointed cone part Sa and the indeformable situation of Sb.And, different by making rubber strip 10A1 with 10A2 winding original position phase place along the circumferential direction separately, can twine two kinds of rubber strip 10A1 and 10A2 simultaneously, can also shorten the winding time to boost productivity.
By twining rubber strip 10, this method can form various rubber assembly G, for example tread rubber G1, extruding glue G4, band bundle pad glue G5, tyre bead top glue G6 or the like, and sidewall rubber G2 and interior line with rubber G3.
Describe according to the present invention particularly preferred embodiment above in detail, yet, the invention is not restricted to described embodiment, and can improve in all its bearings.
Embodiment 1
Make a pneumatic tire (tire specification 215/45ZR17), wherein the tread rubber utilization has the rubber strip formation of specification in the table 1, compares and estimate defective formation situation and uniformity of each test outer surface of tire.It is all identical to remove other specifications shown in the table 1.
(1) defective forms situation
By ocular estimate 30 test tires are carried out the check of the situations such as wearing and tearing of tyre surface outer surface respectively, and assess according to following standard A, B and C.
A: do not find situations such as wearing and tearing.
B: find to have little defective.(do not need repair slight level)
C: find to have big defective.(level that needs finishing)
(2) uniformity
According to JASO C607 standard, utilize and force vibrations (FV) experimental rig measure R FV (O.A.), obtain the mean value of 30 test tires.
Table 1
| Tradition embodiment 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | The comparative example 1 | The comparative example 2 | Embodiment 5 | |
| Rubber strip shape of cross section cross-sectional area＜mm 2Length L 0＜mm〉thickness T＜mm〉ratio L1/L0 defective formational situation A B C uniformity＜N 〉 | Rectangle 40 20 2-24 33 50 | Scalene triangle 15 15 2 0.75 26 31 45 | Scalene triangle 16 16 2 0.8 25 41 44 | | | | Scalene triangle 18 18 2 0.9 24 33 49 | Scalene triangle 49 35 2.8 0.75 26 31 45 |
Embodiment 2
Manufacturing pneumatic tire (tire specification 215/45ZR17), wherein the sidewall rubber utilization has the rubber strip formation of specification in the table 2, compares and the operating characteristics of evaluation rubber strip and the defective formation situation of each outer surface of tire.In this case, use and have rectangular cross-sectional shape the rubber strip of (α=β=90 °) according to the rubber strip of traditional embodiment.Use and to have trapezoidal cross sectional shape (the rubber strip of α=β) according to the rubber strip of the present embodiment.Other specifications except that table 2 are all identical.In addition, the evaluation that the top section defective is formed situation is described on each hurdle in the table 2, and to the evaluation of underclad portion rubber strip operating characteristics.
(1) defective forms situation
Set no defective product for situation such as wearing and tearing not or little defective is arranged but be in the situation that does not need the slight level of repairing, and to be set with faulty goods be to have big defective and be in to need the level that repair.Each is made 100 tires and is used for test, and the no defective product rate is equal to or greater than 80% markers and is designated as zero, less than 80% and be equal to or greater than 50% markers and be designated as △, less than 50% markers be designated as *, assess thus.
(2) operating characteristics of rubber strip
In manufacturing step, even carry out and traditional embodiment identical operations, rubber assembly (sidewall rubber) still can be good at the condition compacted under that does not cause the rubber strip distortion, then be labeled as zero this moment, need careful operation and productivity ratio produced the minimal effect markers to be designated as △, need careful operation and productivity ratio is produced the considerable influence markers to be designated as *, assess thus.
Table 2
(defect situation/operating characteristics)
As shown in Table, can determine, utilize to have the rubber strip that angle [alpha] and β are set at the trapezoidal cross sectional shape that is equal to or less than 60 °,, still can prevent defective formation even when rubber thickness T increases.Particularly,, rubber thickness T can be increased to 2.0mm by angle [alpha] and β are set at 45 °-80 °, even 5.0mm, keep high no defective product rate simultaneously, and can determine that productivity ratio can be improved.
Claims (8)
1. a rubber assembly manufacture method is used for forming the rubber assembly that described rubber strip overlaps by along the circumferential direction overlapping with spiral form and twining rubber strip,
The shape of cross section of wherein said rubber strip forms scalene triangle, described triangle by the base, from the base one end extend to apicad first hypotenuse and the other end that is connected described base with described to apicad and second hypotenuse shorter than described first hypotenuse constitute, the length L 0 on base described in the rubber strip is equal to or greater than 5mm and is equal to or less than 50mm, its thickness T is equal to or greater than 0.2mm and is equal to or less than 5.0mm, and described first hypotenuse is set at greater than 0.5 times and is equal to or less than 0.8 times described base length L0 along the length L 1 on described base.
2. rubber assembly manufacture method as claimed in claim 1, the length L 0 on wherein said base is set at 15-40mm, and thickness T is set at 0.8-3.0mm.
3. rubber assembly manufacture method as claimed in claim 1, forming radius comprising scalene described each summit to apicad described in the described rubber strip is the circular arc chamfering of 0.2-1.0mm.
4. rubber assembly manufacture method as claimed in claim 1, wherein rubber assembly is made of first and second rubber strips with same cross-sectional shape, and
Wherein said first rubber strip twines to the winding final position that approaches the other end from the winding original position that approaches rubber assembly one end, described second rubber strip twines near the winding original position that approaches the rubber assembly other end winding final position that end that passes mutually with described first rubber strip, and, at base one end described in each described first and second rubber strip, twine the axial outside that original position is pointed to rubber assembly at each.
5. a rubber assembly manufacture method is used for forming the rubber assembly that described rubber strip overlaps by along the circumferential direction overlapping with spiral form and twining rubber strip,
The shape of cross section of wherein said rubber strip forms trapezoidal or parallelogram, and have the base, extend first hypotenuse of one end and extend second hypotenuse from the base other end from the base, and
Wherein, in described rubber strip, described first hypotenuse and base form and are set at greater than 45 ° and are equal to or less than 80 ° α angle, and described second hypotenuse and base form and be set at greater than 45 ° and be equal to or less than 80 ° or be set at and be equal to or greater than 100 ° and less than 135 ° β angle
The length L 0 on base described in the rubber strip is equal to or greater than 5mm and is equal to or less than 50mm, and its thickness T is equal to or greater than 0.2mm and is equal to or less than 5.0mm.
6. rubber assembly manufacture method as claimed in claim 5, each summit trapezoidal or parallelogram forms the circular arc chamfering that radius is equal to or greater than 0.2mm and is equal to or less than 1.0mm described in the wherein said rubber strip.
7. rubber assembly manufacture method as claimed in claim 5, wherein said rubber strip forms the overlapping part by described rubber strip and adjacent rubber strip are overlapped, overlap partly along the width W j on described base be set at be equal to or greater than 0.8 times and be equal to or less than 1.2 times described first hypotenuse and second hypotenuse along a of length L separately on described base and the mean value L of Lb.
8. rubber assembly manufacture method as claimed in claim 5, the shape of cross section of wherein said rubber assembly forms trapezoidal, and by described base radially towards first rubber strip of inboard and described base radially toward the outer side second rubber strip constitute, and
Wherein the described first rubber strip spiral is twined, form gap portion in the adjacent part of first rubber strip along tire axial simultaneously, and described second rubber strip is spirally wound in the described gap portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004227018 | 2004-08-03 | ||
| JP2004227018A JP4589676B2 (en) | 2004-08-03 | 2004-08-03 | Manufacturing method of rubber member for tire. |
| JP2004368000 | 2004-12-20 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103056102A Division CN101254661A (en) | 2004-08-03 | 2005-08-03 | Manufacturing method of a rubber member for tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1733457A true CN1733457A (en) | 2006-02-15 |
| CN100564012C CN100564012C (en) | 2009-12-02 |
Family
ID=36023127
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103056102A Pending CN101254661A (en) | 2004-08-03 | 2005-08-03 | Manufacturing method of a rubber member for tire |
| CNB2005100890536A Expired - Fee Related CN100564012C (en) | 2004-08-03 | 2005-08-03 | The manufacture method of rubber member for tire |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103056102A Pending CN101254661A (en) | 2004-08-03 | 2005-08-03 | Manufacturing method of a rubber member for tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4589676B2 (en) |
| CN (2) | CN101254661A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110978907A (en) * | 2018-10-03 | 2020-04-10 | 通伊欧轮胎株式会社 | Method for manufacturing tire |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825345Y2 (en) * | 1976-07-31 | 1983-05-31 | 山村硝子株式会社 | Internal quality analyzer |
| JPH05178012A (en) * | 1992-01-07 | 1993-07-20 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JPH1170590A (en) * | 1997-08-29 | 1999-03-16 | Bridgestone Corp | Manufacture of bead filler and filler section molding device |
| JP3573636B2 (en) * | 1998-12-28 | 2004-10-06 | 横浜ゴム株式会社 | Automotive pneumatic tire and method of manufacturing the same |
| JP3322648B2 (en) * | 1999-03-03 | 2002-09-09 | 住友ゴム工業株式会社 | Rubber conveying device and rubber molding device using the same |
| JP4375864B2 (en) * | 2000-01-14 | 2009-12-02 | 横浜ゴム株式会社 | Pneumatic tire manufacturing method |
| JP4868561B2 (en) * | 2001-01-11 | 2012-02-01 | 東洋ゴム工業株式会社 | Tire and tire manufacturing method |
| WO2002078939A1 (en) * | 2001-03-29 | 2002-10-10 | Bridgestone Corporation | Rubber strip, and method and device for manufacturing tire and tire component using the rubber strip |
| DE60219531T2 (en) * | 2002-02-19 | 2008-01-03 | Pirelli Tyre S.P.A. | PROCESS FOR PREPARING AN AIR RIPE |
| JP4244279B2 (en) * | 2002-03-06 | 2009-03-25 | 株式会社ブリヂストン | Rubber sheet manufacturing method |
| JP2003266555A (en) * | 2002-03-18 | 2003-09-24 | Toyo Tire & Rubber Co Ltd | Strip rubber continuous molding equipment and continuous molding method |
| JP4039895B2 (en) * | 2002-06-24 | 2008-01-30 | 横浜ゴム株式会社 | Method for forming tire tread component and pneumatic tire |
| JP2005238799A (en) * | 2004-02-27 | 2005-09-08 | Toyo Tire & Rubber Co Ltd | Method and apparatus for forming rubber strip material for tire manufacture, and tire manufacturing method |
-
2004
- 2004-08-03 JP JP2004227018A patent/JP4589676B2/en not_active Expired - Fee Related
-
2005
- 2005-08-03 CN CNA2007103056102A patent/CN101254661A/en active Pending
- 2005-08-03 CN CNB2005100890536A patent/CN100564012C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110978907A (en) * | 2018-10-03 | 2020-04-10 | 通伊欧轮胎株式会社 | Method for manufacturing tire |
| CN110978907B (en) * | 2018-10-03 | 2022-06-10 | 通伊欧轮胎株式会社 | Method for manufacturing tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4589676B2 (en) | 2010-12-01 |
| JP2006044006A (en) | 2006-02-16 |
| CN100564012C (en) | 2009-12-02 |
| CN101254661A (en) | 2008-09-03 |
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