CN101137495B - Manufacturing method of run-flat tire - Google Patents
Manufacturing method of run-flat tire Download PDFInfo
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- CN101137495B CN101137495B CN2006800075834A CN200680007583A CN101137495B CN 101137495 B CN101137495 B CN 101137495B CN 2006800075834 A CN2006800075834 A CN 2006800075834A CN 200680007583 A CN200680007583 A CN 200680007583A CN 101137495 B CN101137495 B CN 101137495B
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- tyre bead
- ring
- tire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/24—Drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D2030/201—Manufacturing run-flat tyres
Abstract
A method of manufacturing a run-flat tire capable of manufacturing a run-flat tire with excellent uniformity due to its less occurrence of eccentricity than in conventional methods by simple facility and steps. The method comprises a step for disposing an inner liner rubber (19), reinforcement rubber members (18) reinforcing side wall parts on both sides, and a carcass ply (14) at the prescribed outer peripheral positions of a molding drum, a step for disposing a pair of first beads (1a) and bead fillers (12) and toroidally deforming the inside of the first bead (1a), a step for curling up and stamping the end part (14b) of the carcass ply (14), a step for stamping rubber members (13a) and (13b) forming annular swelled parts on the sides of the bead filler (12) of a toroidal formed product, and a step for forming second beads (1b) by spirally stamping cords (BW) on the formed product while rotating the formed product after that stamping about the axis thereof.
Description
Technical field
The present invention relates to dispose the reinforced run-flat tire of side and the manufacturing approach thereof of the 2nd tyre bead at the ring-type bellying that the tire width direction outside to bead part bloats.
Background technology
Even run-flat tire is meant the tire of the certain distance that when the air pressure that makes inside tires because of faults such as gas leakage reduces, also can go safely.Can carry out one of this Tyre structure that runs flat as being used for, known have that a kind of portion has the run-flat tire of strengthening rubber layer on the sidewall.Adopt this run-flat tire, when tire internal air pressure reduces, strengthen the rubber layer supporting tire and prevent the complete flattening of tire, thereby can run flat.
Yet, under the state that tire internal air pressure reduces, there is such problem: because bead part weakens pushing of wheel rim, so itself and the inlay resultant force reduction of wheel rim, cause bead part to be easy to come off from wheel rim.For this reason; A kind of so-called twins circle type run-flat tire has been proposed; That is, except the ring support portion outer circumferential side at wheel rim disposes the tyre bead, the ring-type bellying that also bloats in the tire width direction outside to bead part disposes tyre bead (with reference to following patent documentation 1～2).Adopt this structure, can when running flat, clasp rim flange because of tyre bead has elastomeric ring-type bellying, thereby can prevent knocking over.
Figure 16 is a tire meridian profile of representing twins circle type run-flat tire in the past.In bead part 1, be provided with tyre bead 1a and gum filler 12, casing ply 14 is rolled from the inboard laterally, and tyre bead 1a and gum filler 12 are sandwiched.Sidewall portion 2 disposes sidewall rubber 11 in its outside, and side disposes the cross section and is the reinforcement rubber layer 9 of crescent shape roughly within it.Ring-type bellying 10 forms to the tire width direction outside of bead part 1 with bloating, and the 2nd tyre bead 1b with ring-type.In addition, enhancement Layer 16 is along the inner peripheral surface configuration of ring-type bellying 10, and wheel rim adhesive tape 17 is configured in the part that directly contacts with wheel rim 8.
There is such problem in this run-flat tire: when running flat, produce tension force if the side rib is crooked at body piles, then the tire toe is easy to lift, so tyre bead is easy to come off.When fastening force that increases tyre bead for fear of this problem or minimizing tire flexure amount, need carry out excessive reinforcement, difficulty, the weight that can produce the wheel rim assembling increase such problem thereupon.
In addition, in following patent documentation 3, record a kind of like this tire: in the reinforced run-flat tire of the side that does not have the 2nd tyre bead 1b, make above-mentioned enhancement Layer 16 for one or more cord being wound in the structure of scroll (helical form).But, owing to there is not the relevant record of its manufacturing approach, therefore be appreciated that for this tire be likewise produced with the method for pasting tablet with common enhancement Layer.
On the other hand, make run-flat tire shown in Figure 16 through following manufacturing process.That is, as Figure 17 (a)～(c) successively shown in, at first, as being formed face 20, setting respectively at its outer circumferential side becomes the inner liner of inner liner 5 rubber 19 and becomes the reinforcement rubber component 18 of strengthening rubber layer 9 with assembly drum designed outer peripheral face.Then, set casing ply 14, and insert tyre bead 1a and gum filler 12 from the outside at assigned position at its outer circumferential side.Then, set casing ply 14 with the mode of rolling casing ply 14, sandwiching tyre bead 1a and gum filler 12.Then, by the method that the assembly drum designed face that is formed 20 is expanded etc. slightly make tyre bead 1a, gum filler 12 and casing ply 14 vertically near.Except setting rubber component the 22, the 2nd tyre bead 1b that constitutes ring-type bellying 10, also set enhancement Layer, wheel rim adhesive tape and sidewall rubber etc. at the outer circumferential side of this casing ply 14.The 2nd tyre bead 1b uses spiral to twine steel bead wire and the other member that produces as the steel bead wire aggregate.Afterwards, this shaping thing is out of shape along tire shape, transfers to vulcanization process behind the formation fetus face 3.
But, in above-mentioned manufacturing approach, when setting the 2nd circular tyre bead 1b, need the mechanism of not pasting with respect to tire eccentric shaft ground.In addition, when making the aggregate of steel bead wire in advance, also there are the supporting device that makes winding, the big such problem of device that the aggregate boundling gets up.And, have such problem: owing to be before making shaping thing expansion, being deformed into tire shape, to set the 2nd tyre bead 1b, therefore when the expansion of shaping thing, distortion, also be easy to produce the off-centre, cross sectional shape distortion of the 2nd tyre bead 1b etc.
In addition; Of patent documentation 3; The enhancement Layer that twines structure at the scroll that will make cord sticks on the shaping thing and when making, and is identical with the situation of above-mentioned stickup the 2nd tyre bead 1b, also can produce the problem on homogeneity question, equipment and the operation that is caused by off-centre.
On the other hand, for the common pneumatic tire that is not run-flat tire, known have a kind of on the shaping thing spiral twine steel bead wire and form the tyre bead tire manufacturing method of (being equivalent to the 1st tyre bead) (for example, with reference to patent documentation 4～5).But these manufacturing approaches have adopted to be used the profile endless core identical with the tire inner surface shape and on this endless core, sets the method for (stickup) member of formation successively, and under the situation of run-flat tire, does not adopt such method.Therefore, up to now, in the manufacturing approach of run-flat tire, be not known in also that spiral on the shaping thing twines steel bead wire and the method that forms tyre bead.
Patent documentation 1: japanese kokai publication sho 51-116507 communique
Patent documentation 2: japanese kokai publication sho 53-138106 communique
Patent documentation 3: TOHKEMY 2001-80318 communique
Patent documentation 4: Japan special table 2004-501815 communique
Patent documentation 5: Japan special table 2003-514706 communique
Summary of the invention
Therefore, the object of the present invention is to provide a kind of manufacturing approach of such run-flat tire:, therefore can produce the run-flat tire that has good uniformity by simple equipment and operation owing to more be difficult to produce the off-centre of the 2nd tyre bead 1b than previous methods.
In addition; Another object of the present invention is to provide a kind of such run-flat tire and manufacturing approach thereof:, therefore can produce the run-flat tire that has good uniformity by simple equipment and operation owing to more be difficult to produce the off-centre of enhancement Layer etc. than previous methods.
Adopt the present invention described as follows, can achieve the above object.
That is, the manufacturing approach of run-flat tire of the present invention is characterised in that it comprises following operation: the assigned position in the assembly drum periphery sets inner liner rubber respectively, is used to strengthen the reinforcement rubber component and the casing ply of sidewall, both sides portion; Set a pair of the 1st tyre bead and gum filler, make than the 1st tyre bead position more in the inner part and be deformed into ring-type (toroid); Before or after this distortion, roll the end of above-mentioned casing ply and paste; The rubber component that constitutes the ring-type bellying is pasted in side at the above-mentioned gum filler of ring-type shaping thing; Shaping thing after the stickup is rotated around the axle center, on one side cord is sticked on the above-mentioned rubber component with helical form and forms the 2nd tyre bead; Form above-mentioned ring-type shaping thing through following operation: set inner liner rubber and the reinforcement rubber component that is used to strengthen sidewall, both sides portion at the assigned position of assembly drum periphery, and each strengthen rubber component than the outboard end of bulging width near more in the outer part position set the casing ply of cord broad ways arrangement respectively; Set a pair of the 1st tyre bead and gum filler at this casing ply than bulging width medial extremity position slightly in the outer part; Make above-mentioned the 1st tyre bead of the ratio position more in the inner part of the shaping thing that obtains be deformed into ring-type; The outer circumferential side of the shaping thing of outboard end after this distortion of above-mentioned each casing ply is rolled and it is sticked on this outer circumferential side.
Adopt the manufacturing approach of run-flat tire of the present invention; Since while making ring-type shaping thing rotate around the axle center, cord is sticked on helical form on the above-mentioned rubber component, therefore need be as the anti-locking mechanism of off-centre the device in the past that is equipped with the 2nd circular tyre bead.In addition, compare, be difficult to produce eccentric during stickup, also be difficult to produce the distortion of off-centre, cross sectional shape etc. when making expansion of shaping thing and distortion, have good uniformity with previous methods.In addition, can make the aggregate of steel bead wire in advance, and the sticker that only adds cord is made, therefore can be made tire by simple equipment and operation.
Adopt this manufacturing approach; After the outside of strengthening rubber component sets casing ply; Ratio medial extremity position slightly in the outer part at this casing ply sets a pair of the 1st tyre bead and gum filler; Make then than the 1st tyre bead position more in the inner part and be deformed into ring-type, portion is rolled in the inboard that therefore can easily set casing ply in the tyre bead inboard.In addition, owing to outboard end from casing ply to the outer circumferential side of the shaping thing that obtains like this that roll and paste, therefore the pressure of the reinforcement rubber component after shaping attaches casing ply easily.Consequently, can not gain in weight and produce the good run-flat tire of anti-tyre bead deciduous with good productivity ratio.And; Owing to become the tire that an end of casing ply is rolled from the inboard, lateral of the 1st tyre bead, therefore when running flat, produce tension force at body piles if the sidewall rib is crooked; Then can produce moment around the tyre bead and the tire toe is pressed on the wheel rim ring support, therefore be difficult to produce knocking over.
In addition, above-mentioned cord is the cord that has coated uncured rubber, and after sticking on this cord on same with helical form, preferably then carries out repeatedly this cord is sticked on the operation on the upper surface of last cord ply with helical form.When use had coated the cord of uncured rubber, bonding the becoming easily between the cord through carrying out above-mentioned operation repeatedly, can form the 2nd tyre bead that is made up of multilayer.
On the other hand, the manufacturing approach of another run-flat tire of the present invention is characterised in that, comprises following operation: the assigned position in the assembly drum periphery sets inner liner rubber respectively, is used to strengthen the reinforcement rubber component and the casing ply of sidewall, both sides portion; Set a pair of the 1st tyre bead and gum filler, make position be deformed into ring-type than the 1st tyre bead inside; Before or after this distortion, the end of rolling and pasting above-mentioned casing ply; The rubber component that constitutes the ring-type bellying is pasted in side at the above-mentioned gum filler of ring-type shaping thing; Shaping thing after the stickup is rotated around the axle center, on one side cord is sticked on above-mentioned rubber component and the zone that rim flange is faced mutually with helical form and forms enhancement Layer; Form above-mentioned ring-type shaping thing through following operation: set inner liner rubber and the reinforcement rubber component that is used to strengthen sidewall, both sides portion at the assigned position of assembly drum periphery, and each strengthen rubber component than the outboard end of bulging width near more in the outer part position set the casing ply of cord broad ways arrangement respectively; Set a pair of the 1st tyre bead and gum filler at this casing ply than bulging width medial extremity position slightly in the outer part; Make above-mentioned the 1st tyre bead of the ratio part in the inner part of the shaping thing that obtains be deformed into ring-type; This outer circumferential side is rolled and sticked on to the outer circumferential side of the shaping thing of outboard end after this distortion of above-mentioned each casing ply.
Adopt the manufacturing approach of another run-flat tire of the present invention; Owing to make on one side ring-type shaping thing in the axle center rotate, cord is sticked on helical form rubber component and zone that rim flange is faced mutually, so need not prevent locking mechanism as the off-centre disposing the installing of circular enhancement Layer tablet in the past.In addition, compare, be difficult to produce eccentric during stickup, also be difficult to produce the distortion of off-centre, cross sectional shape etc. when making expansion of shaping thing and distortion, have good uniformity with previous methods.In addition, can make in advance cord is wound in spiral helicine enhancement Layer tablet, only add the sticker of cord and can make, therefore can make tire by simple equipment and operation.
In technique scheme; Preferably include above-mentioned cord all side direction outer circumferential sides in tire are pasted curl and formed above-mentioned enhancement Layer; After this forms operation, while make the shaping thing rotate around the axle center, will stick on helical form on the above-mentioned rubber component and form the operation of the 2nd tyre bead from the continuous extended cord of above-mentioned enhancement Layer.
Adopt this manufacturing approach, while owing to make ring-type shaping thing rotate around the axle center, cord is sticked on helical form on the above-mentioned rubber component, therefore need be as the anti-locking mechanism of off-centre the device in the past that disposes circular the 2nd tyre bead.In addition, compare, be difficult to produce eccentric during stickup, also be difficult to produce the distortion of off-centre, cross sectional shape etc. when making expansion of shaping thing and distortion, have good uniformity with previous methods.In addition, can make the aggregate of steel bead wire in advance, and utilize the sticker of the cord of enhancement Layer to make, therefore can make tire by simple equipment and operation.
In addition; Above-mentioned cord is the cord that has coated uncured rubber; And after in forming the operation of above-mentioned the 2nd tyre bead, sticking on above-mentioned cord on same with helical form, preferably then carry out repeatedly this cord is sticked on the operation on the upper surface of last cord ply with helical form.When use had coated the cord of uncured rubber, bonding the becoming easily between the cord through carrying out above-mentioned operation repeatedly, can form the 2nd tyre bead that is made up of multilayer.
Adopt this manufacturing approach; After the outside of strengthening rubber component sets casing ply; Ratio medial extremity position slightly in the outer part at this casing ply sets a pair of the 1st tyre bead and gum filler; Make then than the 1st tyre bead part in the inner part and be deformed into ring-type, portion is rolled in the inboard that therefore can easily set casing ply in the tyre bead inboard.In addition, owing to roll the outboard end of casing ply and it is sticked on this outer circumferential side, therefore easily the cord lamination is attached on the reinforcement rubber component after the shaping to the outer circumferential side of the shaping thing that obtains like this.Consequently, weight is increased and produce the good deficency of anti-taking off property of tyre bead with good productivity ratio and protect all tires.And; Owing to become the tire that an end of casing ply is rolled from the inboard, lateral of the 1st tyre bead; Therefore when running flat; Produce tension force if the sidewall rib is crooked at body piles, then can around tyre bead, produce moment and the tire toe is pressed on the ring support of wheel rim, therefore be difficult to produce tyre bead and come off.
On the other hand; Run-flat tire of the present invention is the run-flat tire that produces with above-mentioned any method; Have pair of bead portion, sidewall portion, fetus face, belt, body piles, reinforcement rubber layer and ring-type bellying, above-mentioned bead part has the 1st tyre bead of ring-type and is disposed at the gum filler of the tire outer circumferential side of above-mentioned the 1st tyre bead, and above-mentioned sidewall portion extends to the tire radial outside respectively from this bead part; Above-mentioned fetus face is located between this sidewall portion; Above-mentioned belt is located at all sides in the tire of this fetus face, and above-mentioned body piles are made up of the casing ply of rolling at above-mentioned the 1st tyre bead place, and above-mentioned reinforcement rubber layer is configured in above-mentioned sidewall portion; Above-mentioned ring-type bellying bloats and has the 2nd tyre bead to the tire width direction outside from above-mentioned bead part; It is characterized in that, in above-mentioned ring-type bellying and zone that rim flange is faced mutually, be provided with cord is configured to spiral helicine enhancement Layer, and will be wound in helical form and form above-mentioned the 2nd tyre bead from the continuous extended cord of this enhancement Layer.
Adopt run-flat tire of the present invention; Because it is continuous to form the cord of enhancement Layer and the 2nd tyre bead; And be wound in helical form, therefore can utilize identical cord sticker to form enhancement Layer and the 2nd tyre bead, thereby can make tire by simple equipment and operation.In addition, enhancement Layer and the 2nd tyre bead are difficult to produce eccentric, therefore can make the run-flat tire that has good uniformity.
Description of drawings
Fig. 1 is the tire meridian profile of expression by an example of the 1st run-flat tire that obtains of invention.
Fig. 2 is the major part cutaway view that schematically illustrates by an example of the bead part of the 1st run-flat tire that obtains of invention.
Fig. 3 is the process chart of an example of manufacturing approach of the run-flat tire of expression the 1st invention.
Fig. 4 is the process chart of an example of manufacturing approach of the run-flat tire of expression the 1st invention.
Fig. 5 is the process chart of an example of manufacturing approach of the run-flat tire of expression the 1st invention.
Fig. 6 is the tire meridian profile of expression by other examples of the 1st run-flat tire that obtains of invention.
Fig. 7 is the process chart of other examples of the manufacturing approach of expression the 1st invention.
Fig. 8 is the major part figure of expression by other examples of the 1st run-flat tire that obtains of invention.
Fig. 9 is the tire meridian profile of expression by an example of the 2nd run-flat tire that obtains of invention.
Figure 10 is the major part cutaway view that schematically illustrates by an example of the bead part of the 2nd run-flat tire that obtains of invention.
Figure 11 is the process chart of an example of manufacturing approach of the run-flat tire of expression the 2nd invention.
Figure 12 is the process chart of an example of manufacturing approach of the run-flat tire of expression the 2nd invention.
Figure 13 is the process chart of an example of manufacturing approach of the run-flat tire of expression the 2nd invention.
Figure 14 is the tire meridian profile of expression by other examples of the 2nd run-flat tire that obtains of invention.
Figure 15 is the process chart of other examples of the manufacturing approach of expression the 2nd invention.
Figure 16 is a tire meridian profile of representing an example of run-flat tire in the past.
Figure 17 is the process chart that the manufacturing approach of run-flat tire in the past is described.
Description of reference numerals
1 bead part
1a the 1st tyre bead
1b the 2nd tyre bead
9 strengthen rubber layer
10 ring-type bellyings
11 sidewall rubbers
12 gum fillers
13 ring-shaped rubber bodies
The 13a rubber component
The 13b rubber component
14 casing plies
14a one end (inboard)
The 14b other end (outside)
16 enhancement Layers
18 are used to strengthen the reinforcement rubber component of sidewall portion
19 inner liner rubber
20 is assembly drum designed
C tire equator line
The BW cord
The SC cord
The specific embodiment
The 1st working of an invention mode
Below, with reference to accompanying drawing the 1st working of an invention mode is described.Fig. 1 is the tire meridian profile of expression by an example of the run-flat tire that obtains of manufacturing approach of the 1st invention, and Fig. 2 is a major part cutaway view of schematically representing its bead part.In addition, Fig. 3～Fig. 5 is the process chart of an example of the manufacturing approach of the 1st invention.
The manufacturing approach of run-flat tire of the 1st invention comprises following operation: set inner liner rubber, casing ply respectively and be used to strengthen the reinforcement rubber component of sidewall, both sides portion at the assigned position of assembly drum periphery; Set 1 pair the 1st tyre bead and gum filler, make the inboard of the 1st tyre bead be deformed into ring-type; Before or after this distortion, the end of rolling and pasting above-mentioned casing ply.Thus, obtain ring-type shaping thing.The 1st invention also comprises following operation: the rubber component that constitutes the ring-type bellying is pasted in the side at the above-mentioned gum filler of this ring-type shaping thing; Shaping thing after the stickup is rotated around the axle center, on one side cord is sticked on the above-mentioned rubber component with helical form and forms the 2nd tyre bead.
Like Fig. 3～shown in Figure 5; This embodiment has represented to form through following operation the example of above-mentioned ring-type shaping thing: the assigned position in assembly drum 20 peripheries sets inner liner rubber 19 and the reinforcement rubber component 18 that is used to strengthen sidewall, both sides portion respectively, and the position of more lateral sets the casing ply 14 that the cord broad ways is arranged respectively than each near the outboard end of the bulging width of strengthening rubber component 18; Bulging width medial extremity position slightly in the outer part than this casing ply 14 sets a pair of the 1st tyre bead 1a and gum filler 12; Make above-mentioned the 1st tyre bead 1a of the ratio part in the inner part of the shaping thing that obtains be deformed into ring-type; Outer circumferential side with the outboard end 14b of above-mentioned each casing ply 14 shaping thing after the outer circumferential side of the shaping thing after this distortion is rolled and it is sticked on this distortion.
At first, the run-flat tire that is obtained by this embodiment is described.
The run-flat tire of this embodiment
Like Fig. 1～shown in Figure 2, the run-flat tire of this embodiment has pair of bead portion 1, sidewall portion 2 and fetus face 3, and above-mentioned sidewall portion 2 extends to the tire radial outside from bead part 1 separately, and above-mentioned fetus face 3 is located between the sidewall portion 2.In bead part 1, dispose the boundling body that makes steel bead wire and circumferentially form the tyre bead 1a (being equivalent to above-mentioned the 1st tyre bead) that ring-type forms, and dispose the gum filler triangular in shape 12 that radially extend along tire in the cross section in the tire periphery of tyre bead 1a along tire.In addition, disposing the good wheel rim adhesive tape 17 of mar proof with part that wheel rim 8 directly contacts.
Body piles 4 are made up of casing ply 14, and are provided with respect to pair of bead portion 1 respectively, and this casing ply 14 is that cord is formed roughly to be 90 ° angle with tire equator line C.One end 14a of casing ply 14 rolls from the inboard, lateral of the 1st tyre bead 1a, and other end 14b is configured in the inboard of belt 6.
In the 1st invention, preferably the other end 14b of casing ply 14 is configured in the scope of width 60～90% in two outsides of the maximum layer (being generally innermost layer) of width in the belt 6.Thus, can keep the tire stiffening effect that brings by casing ply 14 and belt 6 cooperations, and can seek the lightweight of tire, and resistance to rolling and riding comfort are good.
Interior all sides at body piles 4 dispose the inner liner 5 that is used to keep air pressure, and all sides dispose the belt 6 that is used for strengthening through the lock ring effect, and the reinforcement belt 7 of configuration as required in the tire of fetus face 3.Belt 6 is made up of the sub-belt that the cord that is arranged in parallel with the angle that becomes to stipulate with respect to tire equator line C forms.
In addition, steel bead wire can use wire etc., and the cord as constituting body piles 4, belt 6 can use organic fibers such as steel or polyester, staple fibre, nylon, aromatic polyamide etc.In order to improve the cementability of all these cords and rubber, to carry out surface treatment or bonding processing etc. to it usually.
The outside of portion 2 disposes sidewall rubber 11 on the sidewall, and the inboard of portion 2 disposes the cross section and is the roughly reinforcement rubber layer 9 of crescent shape on the sidewall.Thus, when tire internal air pressure reduces, can suppress the flexural deformation of tire, thereby can run flat.Reinforcement rubber layer 9 for example is 65～90 ° rubber layer formation by rubber hardness (the A type Du sieve shore hardness test with JISK6253 is the rubber hardness that benchmark is measured, down together).In addition, the reinforcement rubber layer 9 that run-flat tire had of the 1st invention as long as used the reinforcement rubber layer all can use by the reinforced run-flat tire of side in the past, does not have special qualification to hardness, thickness etc.Strengthening rubber layer 9 and be not defined as the structure that is made up of single rubber layer, also can be the structure that is made up of the different a plurality of rubber layers of physical propertys such as hardness.
As shown in Figure 2, in this embodiment, also have ring-type bellying 10, this ring-type bellying 10 bloats to the tire width direction outside from least one side's bead part 1, and has the 2nd tyre bead 1b.This ring-type bellying 10 more bloats to the tire width direction outside than rim flange 8a, and has the inner peripheral surface that extends along the outer circumferential side flexure plane of rim flange 8a.Thus, ring-type bellying 10 can be clasped rim flange 8a effectively, can prevent knocking over.Ring-type bellying 10 preferably is formed at the bead part 1 of both sides respectively.
In ring-type bellying 10, dispose steel bead wire circumferentially forms ring-type along tire tyre bead 1b (being equivalent to above-mentioned the 2nd tyre bead).The tyre bead 1b of this embodiment is configured to: when being installed on wheel rim, its center bit is in put the more position of roller tire outer circumferential side and the tire width direction outside than the external diameter of rim flange 8a.In addition, in the 1st invention, the equipping position of tyre bead 1b does not have special qualification.
As shown in Figure 2, casing ply 14 is rolled from the inboard, lateral at bead part 1a place, and one of which end 14a is configured near the base of gum filler 12.The height H of gum filler 12 for example can change in the scope of 15～65mm, but considers from tire endurance and lightweight aspect, will be the scope that the height P of an end 14a of the casing ply 14 of benchmark is made as 10～20mm with bead part 1a tire periphery side preferably.
In addition, be not limited to the shape of this enforcements shown in just showing by the cross sectional shape of ring-type bellying 10, ring-shaped rubber body 13 and the gum filler 12 of the 1st run-flat tire that obtains of invention.
The manufacturing approach of run-flat tire
Secondly, with reference to Fig. 3～Fig. 5 the manufacturing approach of the run-flat tire of this embodiment is described.
At first, prepare assembly drum 20 cylindraceous.This assembly drum 20 is for having the member of known in the past undergauge and hole enlargement mechanism, and its central portion has and is used to the hole enlargement mechanism that carries out the air bag of shaping or have identical function.In addition, as required, has the air bag mechanism of the outboard end that is used to roll body piles.
Then, shown in Fig. 3 (a), the assigned position that is implemented in assembly drum designed 20 peripheries disposes inner liner rubber 19 respectively, be used to strengthen the operation of the reinforcement rubber component 18 and the casing ply 14 of sidewall, both sides portion.Specifically, the central authorities of inner liner rubber 19 are adapted to the central authorities that are positioned at assembly drum designed 20 peripheries, separate the interval of tread width and set in both sides and to strengthen rubber component 18 from central authorities.In addition, near the outside the outboard end of the bulging width of strengthening rubber component 18 sets casing ply 14 respectively from each.At this moment, the cord that constitutes casing ply 14 is arranged along the drum width.
In this embodiment, the width outside that is illustrated in inner liner rubber 19 sets the example of wheel rim adhesive tape 17 and enhancement Layer 16.Wheel rim adhesive tape 17 preferably is adapted to and makes its end face dock or make its end and inner liner rubber 19 overlapping with inner liner rubber 19.
Then, shown in Fig. 3 (b), be implemented in the operation that sets a pair of the 1st tyre bead 1a and gum filler 12 than the bulging width medial extremity position slightly in the outer part of casing ply 14.The 1st tyre bead 1a and gum filler 12 also can set through overcoat from the outside successively, but preferably set the structure that both are formed as one.
Then, shown in Fig. 3 (c), enforcement makes ratio the 1st tyre bead 1a part in the inner part of the shaping thing that obtains be deformed into the operation of ring-type.Can carry out this distortion through assembly drum designed 20.At this moment, also bead lock mechanism can be set on assembly drum designed 20 in advance, and clamp bead part 1a through all sides in the tire such as wheel rim adhesive tape 17 and casing ply 14.Thus, can be out of shape accurately.Through this distortion, an end 14a who becomes casing ply 14 is sandwiched in state between inner liner rubber 19 and the 1st tyre bead 1a.The two sides that assembly drum designed 20 wide diameter portion has been shown in Fig. 3 (c) are the example of general plane, but the two sides of preferred wide diameter portion form protruding laterally flexure plane to the tire inner surface shape suchly.
Then, shown in Fig. 4 (a), enforcement is rolled the outer circumferential side of the shaping thing of outboard end (other end 14b) after distortion of each casing ply 14 and it is sticked on the operation of this outer circumferential side.Form ring-type shaping thing through this operation.
At this moment, can using bead lock mechanism to fix under the state of tyre bead 1a, carry out rolling of casing ply 14 individually or in the lump as required by handwork.In addition, the rubber bag tank that is known as air bag through setting applies interior pressure, can easily roll casing ply 14.At this moment, in order to roll enhancement Layer 16 and wheel rim adhesive tape 17 simultaneously, also can be in advance between they and casing ply 14, insert and put separator, and after peeling off enhancement Layer 16 grades, implement subsequent processing.
Shown in Fig. 4 (b), the side that the 1st invention is included in the gum filler 12 of ring-type shaping thing paste to constitute the operation of the rubber component 13 of ring-type bellying.Ring-shaped rubber body 13 is by constituting with a kind of or rubber component 13a more than 2 kinds, 13b etc.Ring-shaped rubber body 13 for example preferred rubber hardness is 40～75 °, and has enough rigidity and the crack property that can bear repeatedly the impact that passes over from wheel rim 8.Ring-shaped rubber body 13 makes casing ply 14 between this ring-shaped rubber body 13 and fill between the doctrine 12 ground and paste outside the tire width direction of gum filler 12.
Shown in Fig. 4 (c), while the 1st invention comprises that the shaping thing that makes after the stickup rotates around the axle center, cord BW is sticked on helical form on the above-mentioned rubber component 13 and forms the operation of the 2nd tyre bead 1b.Fig. 5 (a)～(b) illustrates in greater detail this operation.In embodiment illustrated, shown in arrow, at first cord BW is pasted curl from interior all side direction outer circumferential sides, but also can be to pasting in the other direction.
Also can paste 1 or paste many cord BW simultaneously, consider, preferably paste 1 cord BW from aspects such as uniformity, intensity, productivity ratio.The material of cord BW can be used organic fibers such as wire, all-steel cord, polyester, staple fibre, nylon, aromatic polyamide etc.That is, in previous methods,, therefore use organic fiber to be difficult to keep toroidal, but owing in the 1st invention, paste, even therefore use organic fiber, its uniformity is also good owing to make the tyre bead of ring-type in advance.
In addition, from easily making bonding aspect consideration between the cord, the preferred cord that has coated uncured rubber that uses.This uncured rubber for example can use when making the 1st tyre bead, and for example can use rubber viscosity is 50～80 rubber.At this, rubber viscosity is the value of measuring according to " Mooney viscosity test " in JIS K6300 " uncured rubber physical test method ".
In the 1st invention; Cord BW is pasted curl to get final product; Also can be arbitrarily around cord BW (also comprise here with helical form around), but shown in Fig. 5 (a), preferably at first cord BW is being sticked on helical form on one side; In addition, preferably then carry out surperficial operation of pasting cord BW with helical form repeatedly above that.
In this embodiment, show and pasting 5 circle cord BW, on next face, pasted for 4 weeks, then pasting the example in 3 weeks, 2 weeks with helical form on the initial face.Through reducing the loop wire number of turns so gradually, be easy to after vulcanization process, keep the shape of the 2nd tyre bead 1b.In addition, through pasting more than 2 circles, likewise be easy to after vulcanization process, keep the shape of the 2nd tyre bead 1b in the superiors.In addition, with cord BW with helical form stick on same go up after, it is returned, then it is sticked on its upper surface with helical form, thereby can be along the recess that forms by 2 cords with cord BW stickup curl.
Then, shown in Fig. 4 (c), roll enhancement Layer 16 and wheel rim adhesive tape 17, and they are sticked on assigned position.And portion 2 sets sidewall rubber 11 towards the sidewall from ring-type bellying 10 along the outer peripheral face of ring-shaped rubber body 13.Afterwards, form belt 6 and strengthen belt 7 at the tire outer circumferential side of this formed body, and at its outer circumferential side configuration tread rubber and form fetus face 3.After in the green tire that above-mentioned that kind is obtained imports metal die, make it is carried out sulfidization molding.
Other embodiments of the 1st invention
(1) in the above-described embodiment; Show and use 2 layers of casing ply; Through the outboard end of above-mentioned each casing ply being rolled and is pasted the other end that makes casing ply and roll the example of the ring-type shaping thing that forms from the inboard, lateral, but can use 1 layer of casing ply make shown in Figure 6, have a run-flat tire of constructing with identical in the past casing ply.Even in this case, while also can implement to make the shaping thing to rotate around the axle center, cord BW is sticked on helical form on the rubber component 13 and form the operation of the 2nd tyre bead 1b identically with above-mentioned embodiment.
That is, shown in Fig. 7 (a)～(c), the 1st invention has following operation and gets final product: the assigned position in assembly drum 20 peripheries sets inner liner rubber 19 respectively, is used to strengthen the reinforcement rubber component 18 and the casing ply 14 of sidewall, both sides portion; Set 1 couple the 1st tyre bead 1a and gum filler 12, make the inboard part of the 1st tyre bead 1a be deformed into ring-type; Before or after this distortion, the end of rolling and pasting above-mentioned casing ply 14.
Specifically, prepare the cylindric assembly drum designed 20 of above-mentioned that kind, shown in Fig. 7 (a), set inner liner rubber 19, be used to strengthen the reinforcement rubber component 18 and the casing ply 14 of sidewall, both sides portion at the assigned position of assembly drum designed 20 peripheries.At this moment; The central authorities of inner liner rubber 19 are adapted to the central authorities that are positioned at assembly drum designed 20 peripheries; Separate the interval of tread width and set in both sides and to strengthen rubber component 18 from central authorities, and, so that being positioned at the mode of the central authorities of assembly drum designed 20 peripheries, the central authorities of casing ply 14 set casing ply 14.At this moment, the cord that constitutes casing ply 14 is arranged along the drum width.
Though not shown, also can set wheel rim adhesive tape 17 and enhancement Layer 16 in the width outside of inner liner rubber 19.Wheel rim adhesive tape 17 preferably is adapted to and makes its end face dock or make its end and inner liner rubber 19 overlapping with inner liner rubber 19.
Then, the equipping position that is implemented in the 1st tyre bead 1a at casing ply 14 places sets the operation of 1 couple the 1st tyre bead 1a and gum filler 12.The 1st tyre bead 1a and gum filler 12 also can come casing ply 14 ground to set through overcoat successively, make both structures of forming as one of the 1st tyre bead 1a and gum filler 12 but preferably set.
Then, shown in Fig. 7 (b), implement to roll the end of casing ply 14 and, but this operation also can carry out the shaping composition deformation after being the operation of ring-type with the operation of its stickup.Paste operation through this, form the shape that sandwiches the 1st tyre bead 1a and gum filler 12 with the casing ply of rolling 14.
Then, shown in Fig. 7 (c), enforcement makes ratio the 1st tyre bead 1a part more in the inner part of the shaping thing that obtains be deformed into the operation of ring-type.Form ring-type shaping thing through this operation.Can carry out this distortion through assembly drum designed 20.At this moment, also bead lock mechanism can be set on assembly drum designed 20 in advance, and clamp bead part 1a through all sides in the tire such as wheel rim adhesive tape 17 and casing ply 14.Thus, can be out of shape accurately.
Then, shown in Fig. 7 (c), paste the rubber component 13 that constitutes the ring-type bellying in the side of the gum filler 12 of ring-type shaping thing, but this operation can likewise be carried out with above-mentioned embodiment.
In addition, shown in Fig. 7 (d), while make shaping thing after the stickup rotate around the axle center, cord BW is sticked on helical form on the above-mentioned rubber component 13 and form the 2nd tyre bead 1b, and this operation also can likewise be carried out with above-mentioned embodiment.
(2) in the above-described embodiment; Show when cord is pasted curl; At the example of pasting 5 circles on the initial face, 3 circles, 2 circles are enclosed, then paste in stickup 4 on next face; But as shown in Figure 8, when forming the 2nd tyre bead 1b, can adopt variety of way in that cord BW is pasted curl.
Illustrated shape is the shape that the number of turns is few more the closer to the upper strata (trapezoidal or triangle), but also can be as quadrangle, the shape that the number of turns of each layer equates or make the number of turns of an end make the shape (6 limit shapes or 8 limit shapes) etc. of its minimizing after increasing again.
As the shape of the 2nd above-mentioned tyre bead, consider from preventing aspect, wheel rim assembleability, processability, lightweight aspect that tyre bead comes off, particularly preferably be trapezoidal.
(3) in the above-described embodiment; As inner liner rubber, reinforcement rubber component, wheel rim adhesive tape, sidewall rubber and tread rubber etc.; Show the example that uses 1 layer of tablet or plate object to form; But these members all are through continuous rubber ribbon part is wound in the shape that helical form obtains to stipulate, all are (the so-called confession gluing methods) that can set therefore.
Specifically, while make assembly drum designed or the shaping thing rotates around the axle center, discharge the rubber ribbon part and paste from the rubber extrusion device, paste position is moved on one side, thereby can set member through the confession gluing method.This confession gluing method is known to have the whole bag of tricks, and these methods all can adopt.
(4) in the above-described embodiment; Show the example that sets wheel rim adhesive tape and enhancement Layer in advance in the width outside of assembly drum designed inner liner rubber; But also can be after having implemented to roll the operation of casing ply; Paste the rubber component that constitutes the ring-type bellying, then, after setting wheel rim adhesive tape and enhancement Layer, it is rolled.
Adopt this manufacturing approach, can use the rubber bag tank that is known as air bag to roll the operation of curtain portion layer successively and roll the operation of wheel rim adhesive tape and enhancement Layer.
The 2nd working of an invention mode
Below, with reference to description of drawings the 2nd working of an invention mode.Fig. 9 is the tire meridian profile of an example of the run-flat tire of expression the 2nd invention, and Figure 10 is a major part cutaway view of schematically representing bead part.In addition, Figure 11～Figure 13 is the process chart of an example of the manufacturing approach of expression the 2nd invention.
The manufacturing approach of the run-flat tire of the 2nd invention comprises following operation: the assigned position in the assembly drum periphery sets inner liner rubber respectively, is used to strengthen the reinforcement rubber component and the casing ply of sidewall, both sides portion; Set a pair of the 1st tyre bead and gum filler, make than the 1st tyre bead part more in the inner part and be deformed into ring-type; Before or after this distortion, roll the end of above-mentioned casing ply and with its stickup.Thus, obtain ring-type shaping thing.The manufacturing approach of the 2nd invention also comprises: the rubber component that constitutes the ring-type bellying is pasted in the side at the above-mentioned gum filler of ring-type shaping thing; Shaping thing after the stickup is rotated around the axle center, on one side cord is sticked on above-mentioned rubber component and the zone that rim flange is faced mutually with helical form and forms enhancement Layer.
Like Figure 11～shown in Figure 13; This embodiment shows the example that forms above-mentioned ring-type shaping thing through following operation: set inner liner rubber 19 and the reinforcement rubber component 18 that is used to strengthen sidewall, both sides portion respectively at the assigned position of assembly drum 20 peripheries, and more in the outer part position sets the casing ply 14 of cord broad ways arrangement respectively than each near the outboard end of the bulging width of strengthening rubber component 18; Bulging width medial extremity position slightly in the outer part than this casing ply 14 sets a pair of the 1st tyre bead 1a and gum filler 12; Make above-mentioned the 1st tyre bead 1a of the ratio part in the inner part of the shaping thing that obtains be deformed into ring-type; The outer circumferential side of the shaping thing of outboard end 14b after this distortion of above-mentioned each casing ply 14 is rolled and it is sticked on this outer circumferential side.
At first, to obtain by this embodiment the 2nd the invention run-flat tire describe.
The run-flat tire of the 2nd invention
Like Fig. 9～shown in Figure 10, the run-flat tire of the 2nd invention has pair of bead portion 1, sidewall portion 2 and fetus face 3, and above-mentioned sidewall portion 2 extends to the tire radial outside from bead part 1 separately, and above-mentioned fetus face 3 is located between the sidewall portion 2.In bead part 1, dispose the boundling body that makes steel bead wire and circumferentially form the tyre bead 1a (being equivalent to above-mentioned the 1st tyre bead) that ring-type forms, and dispose the gum filler triangular in shape 12 that radially extend along tire in the cross section in the tire periphery of tyre bead 1a along tire.In addition, the good wheel rim adhesive tape 17 of part configuration mar proof that is preferably directly contacting with wheel rim 8.
Body piles 4 are made up of casing ply 14, and are provided with respectively with respect to pair of bead portion 1, and this casing ply 14 is to form roughly to be 90 ° angle cord with tire equator line C.The end 14a that casing ply 14 has been shown in this embodiment rolls from the inboard, lateral of the 1st tyre bead 1a, and other end 14b is configured in the example of the inboard of belt 6.
In this embodiment, preferably the other end 14b of casing ply 14 is configured in the scope of width 60～90% in two outsides of the maximum one deck (being generally innermost layer) of width in the belt 6.Thus, can keep the tire stiffening effect that brings with belt 6 cooperations by this casing ply 14, and can seek the lightweight of tire, and resistance to rolling and riding comfort are good.
Interior all sides at body piles 4 dispose the inner liner 5 that is used to keep air pressure, and all sides dispose the belt 6 that is used for strengthening through the lock ring effect, and the reinforcement belt 7 that disposes as required in the tire of fetus face 3.Belt 6 is by constituting to be the sub-belt that the angle of regulation and the cord that is arranged in parallel form with tire equator line C.
In addition, as steel bead wire, can use wire etc., the cord as constituting body piles 4, belt 6 can use organic fibers such as steel, polyester, staple fibre, nylon, aromatic polyamide etc.In order to improve the cementability of all these cords and rubber, to carry out surface treatment, bonding processing etc. to it usually.
The outside of portion 2 disposes sidewall rubber 11 on the sidewall, and the inboard of portion 2 disposes the cross section and is the roughly reinforcement rubber layer 9 of crescent shape on the sidewall.Thus, when tire internal air pressure reduces, can suppress the flexural deformation of tire, thereby can run flat.Reinforcement rubber layer 9 for example is 65～90 ° rubber layer formation by rubber hardness (the A type Du sieve rebound hardness test with JISK6253 is the rubber hardness that benchmark is measured, down together).In addition, the reinforcement rubber layer 9 that run-flat tire had of the 2nd invention as long as all can use for the employed reinforcement rubber layer of the reinforced run-flat tire of side in the past, does not have special qualification to hardness, thickness etc.Strengthening rubber layer 9 and be not defined as the structure that is made up of single rubber layer, also can be the structure that is made up of the different multilayer rubber layer of physical propertys such as hardness.
In the 2nd invention, shown in figure 10, also have ring-type bellying 10, this ring-type bellying 10 bloats to the tire width direction outside from least one side's bead part 1, and has the 2nd tyre bead 1b.This ring-type bellying 10 more bloats to the tire width direction outside than rim flange 8a, and has the inner peripheral surface that extends along the outer circumferential side flexure plane of rim flange 8a.Thus, ring-type bellying 10 can be clasped rim flange 8a effectively, can prevent knocking over.Ring-type bellying 10 preferably is formed at the bead part 1 of both sides respectively.
In ring-type bellying 10, dispose steel bead wire and circumferentially form the tyre bead 1b (being equivalent to above-mentioned the 2nd tyre bead) that ring-type forms along tire.The tyre bead 1b of this embodiment is configured to: when being installed on wheel rim, its center bit is in put more a side of roller tire periphery and the position in the tire width direction outside than the external diameter of rim flange 8a.In addition, in the 2nd invention, the equipping position of tyre bead 1b does not have special qualification.
The run-flat tire of the 2nd invention is characterised in that; Be provided with in the zone with rim flange is faced mutually of ring-type bellying 10 cord SC is configured to the enhancement Layer 16 that helical form forms, and will be wound in helical form and be formed with the 2nd tyre bead 1b from enhancement Layer 16 continuous cord SC.
Shown in figure 10, casing ply 14 is rolled from the inboard, lateral at bead part 1a place, and one of which end 14a is configured near the base of gum filler 12.The height H of gum filler 12 for example can change in the scope of 15～65mm, but considers from tire endurance and lightweight aspect, preferably will be the scope that the height P of an end 14a of the casing ply 14 of benchmark is made as 10～20mm with the tire periphery side of tyre bead 1a.
In addition, be not limited to the shape of this enforcements shown in just showing by the cross sectional shape of ring-type bellying 10, ring-shaped rubber portion 13 and the gum filler 12 of the 2nd run-flat tire that obtains of invention.
The manufacturing approach of the run-flat tire of the 2nd invention
Secondly, with reference to Figure 11～Figure 13 the manufacturing approach of the run-flat tire of the 2nd invention is described.The difference of the operation of Fig. 3 that the operation shown in Figure 11 (a)～Figure 12 (b) of the 2nd invention and the 1st is invented～shown in Figure 4 only is, in Figure 11 (a)～Figure 12 (b), is not provided with enhancement Layer 16 this point.At first, prepare and the identical assembly drum cylindraceous 20 of the 1st invention.
Then, shown in Figure 11 (a), the assigned position that is implemented in assembly drum designed 20 peripheries sets inner liner rubber 19 respectively, be used to strengthen the operation of the reinforcement rubber component 18 and the casing ply 14 of sidewall, both sides portion.Specifically, can adopt and the identical operation of the 1st invention.
Then, shown in Figure 11 (b), be implemented in the operation that sets a pair of the 1st tyre bead 1a and gum filler 12 than the bulging width medial extremity position slightly in the outer part of casing ply 14.Specifically, can adopt and the identical operation of the 1st invention.
Then, shown in Figure 11 (c), implement to make the part of inboard of the 1st tyre bead 1a of the shaping thing that obtains to be deformed into the operation of ring-type.Specifically, can adopt and the identical operation of the 1st invention.
Then, shown in Figure 12 (a), enforcement is rolled the outer circumferential side of the shaping thing of outboard end (other end 14b) after distortion of each casing ply 14 and it is sticked on the operation of this outer circumferential side.Form ring-type shaping thing through this operation.Specifically, can adopt and the identical operation of the 1st invention.
At this moment, can be as required using bead lock mechanism fixedly under the state of tyre bead 1a, carry out rolling of casing ply 14 individually or together by handwork.In addition, the rubber bag tank that is known as air bag through assembling applies interior pressure, can easily roll casing ply 14.At this moment,, also can between wheel rim adhesive tape 17 and casing ply 14, insert separator in advance, after peeling off wheel rim adhesive tape 17 grades, implement subsequent processing in order to roll wheel rim adhesive tape 17 simultaneously.
Shown in Figure 12 (b), the side that the 2nd invention is included in the gum filler 12 of ring-type shaping thing paste to constitute the operation of the rubber component 13 of ring-type bellying.Ring-shaped rubber body 13 is by constituting with a kind of or rubber component 13a more than 2 kinds, 13b etc.Ring-shaped rubber body 13 for example preferred rubber hardness is 40～75 °, and has enough rigidity and the crack property that can bear repeatedly the impact that passes over from wheel rim 8.Ring-shaped rubber body 13 and gum filler 12 between under the situation of casing ply 14, stick on the tire width direction outside of gum filler 12.
Shown in Figure 12 (c), the 2nd invention on one side comprises that the shaping thing that makes after the stickup rotates, in rubber component 13 and zone that rim flange is faced mutually, cord S C stickup curl formed the operation of enhancement Layer 16 around the axle center.Such example has been shown in this embodiment; This example comprises to be pasted cord SC all side direction outer circumferential sides in tire curl and forms above-mentioned enhancement Layer 16; After this forms operation, while make the shaping thing rotate around the axle center, will stick in the shape of a spiral on the rubber component 13 shape and be formed with the operation of the 2nd tyre bead 1b from above-mentioned enhancement Layer 16 continuous cord SC.Figure 13 (a)～(c) illustrates in greater detail these operations.
Also can paste 1 or paste many cord SC simultaneously, consider, preferably paste 1 cord SC from aspects such as uniformity, intensity, productivity ratio.Material as cord SC can be used organic fibers such as wire, all-steel cord, polyester, staple fibre, nylon, aromatic polyamide etc.That is, in previous methods,, therefore be difficult to keep toroidal, but owing in the 2nd invention, paste, even therefore use organic fiber, its uniformity is also good by organic fiber owing to produce the tyre bead of ring-type in advance.
In addition, consider the preferred cord that has coated uncured rubber that uses from easily making aspect bonding between the cord.As this uncured rubber, the material that can give an example out and when making the 1st tyre bead, use, for example using rubber viscosity is 50～80 rubber.At this, rubber viscosity is the value of measuring according to " Mooney viscosity test " in JIS K6300 " uncured rubber physical test method ".
In the 2nd invention, shown in Figure 13 (a), when forming enhancement Layer 6, preferably at first cord SC helically is sticked on same.In embodiment illustrated, shown in arrow, at first, cord SC is pasted curl from interior all side direction outer circumferential sides, but when forming enhancement Layer 16 and the 2nd tyre bead 1b discontinuously, also can paste to the direction opposite with the direction of arrow.
In the manufacturing approach of the 2nd invention; When forming enhancement Layer 16; Paste the zone of cord SC so long as comprise a part or whole zones in the zone of facing mutually with rim flange and get final product; For example also can extend side or the below that is arranged to the 1st tyre bead 1a, perhaps extend the side that is arranged to the 2nd tyre bead 1b.In addition, when cord SC was pasted curl, the pitch of cord SC (distance between centers) was preferably 1.5～3mm.In pitch during greater than this scope, the tendency that the resistance effect that exists tyre bead to come off reduces.
In addition, when forming the 2nd tyre bead 1b, cord SC is pasted curl get final product, also can twine cord SC (also comprise and twining) arbitrarily here, but shown in Figure 13 (b), preferably at first cord SC is sticked on on the one side with helical form with helical form.In addition, preferred then such operation of carrying out cord BW is sticked on helical form its upper surface repeatedly shown in Figure 13 (c).
In this embodiment, illustrated when forming the 2nd tyre bead 1b, enclosed cord SC, on next face, paste 4 circles, then pasting the example that 3 circles, 2 enclose with helical form stickup 5 on the initial face.Through reducing the number of turns so gradually, be easy to after vulcanization process, keep the shape of the 2nd tyre bead 1b.In addition, through pasting more than 2 circles, likewise be easy to after vulcanization process, keep the shape of the 2nd tyre bead 1b in the superiors.In addition, with cord BW with helical form stick on same go up after, it is returned, then it is sticked on upper surface with helical form, thereby can be along the recess that forms by 2 cords with cord SC stickup curl.
Then, shown in Figure 12 (c), roll wheel rim adhesive tape 17, it is sticked on assigned position.And portion 2 sets sidewall rubber 11 towards the sidewall from ring-type bellying 10 along the outer peripheral face of ring-shaped rubber body 13.Afterwards, form belt 6 and strengthen belt 7 at the tire outer circumferential side of this formed body, and at its outer circumferential side configuration tread rubber and form fetus face 3.
Other embodiments of the 2nd invention
(1) in the above-described embodiment; Show and use the example of 2 layers of casing ply through the ring-type shaping thing the outboard end of above-mentioned each casing ply being rolled and its stickup formed the other end that makes casing ply and roll from the inboard, lateral, but can use 1 layer of casing ply make shown in Figure 14, have a run-flat tire of constructing with identical in the past casing ply.Even in this case, while also can implement to make the shaping thing to rotate, cord SC pasted curl in the zone of facing mutually with rim flange at rubber component 13 and form the operation of enhancement Layer 16 identically with above-mentioned embodiment around the axle center.
That is, shown in Figure 15 (a)～(c), the 2nd invention has following operation and gets final product: the assigned position in assembly drum 20 peripheries sets inner liner rubber 19 respectively, is used to strengthen the reinforcement rubber component 18 and the casing ply 14 of sidewall, both sides portion; Set a pair of the 1st tyre bead 1a and gum filler 12, make the inboard part of the 1st tyre bead 1a be deformed into ring-type; Before or after this distortion, roll the end of above-mentioned casing ply 14 and paste.
Specifically, the identical operation of operation shown in Fig. 7 (a)～(c) that the operation shown in Figure 15 (a)～(c) can adopt with the 1st invents.
In addition; Shown in Figure 15 (d); While making the shaping thing after the stickup rotate, in rubber component 13 and zone that rim flange is faced mutually, cord SC pasted curl and forms enhancement Layer 16 around the axle center, and this operation and operation thereafter also can likewise be carried out with above-mentioned embodiment.
(2) in above-mentioned embodiment, show the example that forms enhancement Layer and the 2nd tyre bead with continuous cord continuously, but also can use other cords to form enhancement Layer and the 2nd tyre bead.In this case, for the 2nd tyre bead, also can use the member of making the steel bead wire aggregate with previous methods through spiral winding steel bead wire in addition identically.
(3) in the above-described embodiment; Show forming the 2nd tyre bead 1b when cord pasted curl; Enclose cord SC in stickup on the initial face 5, on next face, paste 4 circles, then paste the example that 3 circles, 2 enclose; But when forming the 2nd tyre bead 1b in that cord SC is pasted curl, can such variety of way that adopts as shown in Figure 8.
(4) in the above-described embodiment; Show as inner liner rubber, strengthen the example that 1 layer of tablet of use such as rubber component, wheel rim adhesive tape, sidewall rubber and tread rubber or plate object carry out moulding; These members all are that continuous rubber ribbon part is wound in helical form and the shape that obtains to stipulate, all are (the so-called confession gluing methods) that can set therefore.Specifically, can adopt the identical operation of other embodiments of inventing with the 1st.
(5) in above-mentioned embodiment; Show the example that sets the wheel rim adhesive tape in advance in the width outside of assembly drum designed inner liner rubber; But also can be after implementing to roll the operation of casing ply; Paste the rubber component that constitutes the ring-type bellying, then, after setting the wheel rim adhesive tape, it is rolled.
Adopt this manufacturing approach, can use the rubber bag tank that is known as air bag to roll the operation of curtain portion layer successively and roll the operation of wheel rim adhesive tape and enhancement Layer.
Claims (6)
1. the manufacturing approach of a run-flat tire, it comprises following operation:
Set inner liner rubber, casing ply respectively and be used to strengthen the reinforcement rubber component of sidewall, both sides portion at the assigned position of assembly drum periphery;
Set a pair of the 1st tyre bead and gum filler, make than the 1st tyre bead part in the inner part and be deformed into ring-type;
Before or after this distortion, roll the end of above-mentioned casing ply and paste this end;
The rubber component that constitutes the ring-type bellying is pasted in side at the above-mentioned gum filler of ring-type shaping thing;
Shaping thing after the stickup is rotated around the axle center, on one side cord is sticked on the above-mentioned rubber component with helical form and forms the 2nd tyre bead;
Form above-mentioned ring-type shaping thing through following operation:
Set inner liner rubber and the reinforcement rubber component that is used to strengthen sidewall, both sides portion at the assigned position of assembly drum periphery, and more in the outer part position sets the casing ply of cord broad ways arrangement respectively than each near the bulging width outboard end of strengthening rubber component;
Bulging width medial extremity position slightly in the outer part than this casing ply sets a pair of the 1st tyre bead and gum filler;
Make above-mentioned the 1st tyre bead of the ratio part in the inner part of the shaping thing that obtains be deformed into ring-type;
The outer circumferential side of the shaping thing of outboard end after this distortion of above-mentioned each casing ply is rolled and it is sticked on this outer circumferential side.
2. the manufacturing approach of run-flat tire according to claim 1, wherein,
Above-mentioned cord is the cord that has coated uncured rubber, after sticking on this cord on same with helical form, then carries out on the upper surface of last cord ply pasting with helical form the operation of this cord repeatedly.
3. the manufacturing approach of a run-flat tire, it comprises following operation:
Set inner liner rubber, casing ply respectively and be used to strengthen the reinforcement rubber component of sidewall, both sides portion at the assigned position of assembly drum periphery;
Set a pair of the 1st tyre bead and gum filler, make than the 1st tyre bead part in the inner part and be deformed into ring-type;
Before or after this distortion, roll the end of above-mentioned casing ply and paste this end;
The rubber component that constitutes the ring-type bellying is pasted in side at the above-mentioned gum filler of ring-type shaping thing;
Shaping thing after the stickup is rotated around the axle center, on one side cord is sticked on above-mentioned rubber component and the zone that rim flange is faced mutually with helical form and forms enhancement Layer;
Form above-mentioned ring-type shaping thing through following operation:
Set inner liner rubber and the reinforcement rubber component that is used to strengthen sidewall, both sides portion at the assigned position of assembly drum periphery, and more in the outer part position sets the casing ply of cord broad ways arrangement respectively than each near the bulging width outboard end of strengthening rubber component;
Bulging width medial extremity position slightly in the outer part than this casing ply sets a pair of the 1st tyre bead and gum filler;
Make above-mentioned the 1st tyre bead of the ratio part in the inner part of the shaping thing that obtains be deformed into ring-type;
The outer circumferential side of the shaping thing of outboard end after this distortion of above-mentioned each casing ply is rolled and is pasted on the outer circumferential side of this shaping thing.
4. the manufacturing approach of run-flat tire according to claim 3, wherein, the manufacturing approach of this run-flat tire comprises following operation:
Above-mentioned cord all side direction outer circumferential sides in tire are pasted curl and formed above-mentioned enhancement Layer; After this forms operation, while make the shaping thing rotate around the axle center, will stick on helical form on the above-mentioned rubber component and form the 2nd tyre bead from the continuous extended cord of above-mentioned enhancement Layer.
5. the manufacturing approach of run-flat tire according to claim 4, wherein,
Above-mentioned cord is the cord that has coated uncured rubber, in forming the operation of above-mentioned the 2nd tyre bead, stick on above-mentioned cord on same with helical form after, then carry out on the upper surface of last cord ply operation repeatedly with this cord of helical form stickup.
6. run-flat tire, this run-flat tire are that the method with claim 1 or 3 produces, and comprise bead part, sidewall portion, fetus face, belt, body piles, reinforcement rubber layer and ring-type bellying;
Above-mentioned bead part is a pair of; Have the 1st tyre bead of ring-type and be disposed at the gum filler of the tire outer circumferential side of above-mentioned the 1st tyre bead; Above-mentioned sidewall portion extends to the tire radial outside respectively from this bead part; Above-mentioned fetus face is located between this sidewall portion, and above-mentioned belt is located at all sides in the tire of this fetus face, and above-mentioned body piles are made up of the casing ply of rolling at above-mentioned the 1st tyre bead place; Above-mentioned reinforcement rubber layer is configured in above-mentioned sidewall portion, and above-mentioned ring-type bellying bloats and has the 2nd tyre bead to the tire width direction outside from above-mentioned bead part;
Wherein, in above-mentioned ring-type bellying and zone that rim flange is faced mutually, be provided with cord is configured to the enhancement Layer that helical form forms, and will be wound in helical form and form above-mentioned the 2nd tyre bead from the continuous extended cord of this enhancement Layer.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP065407/2005 | 2005-03-09 | ||
| JP065430/2005 | 2005-03-09 | ||
| JP2005065430A JP4507921B2 (en) | 2005-03-09 | 2005-03-09 | Run-flat tire and manufacturing method thereof |
| JP2005065407A JP4507920B2 (en) | 2005-03-09 | 2005-03-09 | Method for manufacturing run-flat tires |
| PCT/JP2006/304377 WO2006095735A1 (en) | 2005-03-09 | 2006-03-07 | Method of manufacturing run-flat tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101137495A CN101137495A (en) | 2008-03-05 |
| CN101137495B true CN101137495B (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800075834A Expired - Fee Related CN101137495B (en) | 2005-03-09 | 2006-03-07 | Manufacturing method of run-flat tire |
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| JP (1) | JP4507920B2 (en) |
| CN (1) | CN101137495B (en) |
Families Citing this family (4)
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|---|---|---|---|---|
| JP5052983B2 (en) * | 2007-07-26 | 2012-10-17 | 東洋ゴム工業株式会社 | Pneumatic tire manufacturing method |
| NL2018238B1 (en) * | 2017-01-26 | 2018-08-01 | Vmi Holland Bv | Apparatus and method for applying a gum strip to an edge of a cord reinforced ply |
| JP7119942B2 (en) * | 2018-11-22 | 2022-08-17 | 住友ゴム工業株式会社 | Tire manufacturing method |
| CN113635586A (en) * | 2021-09-18 | 2021-11-12 | 青岛森麒麟轮胎股份有限公司 | Method for designing run-flat tire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086649C (en) * | 1997-05-29 | 2002-06-26 | 固特异轮胎和橡胶公司 | Tire with composite ply structure and method of manufacture |
| JP2003191722A (en) * | 2001-12-06 | 2003-07-09 | Goodyear Tire & Rubber Co:The | Bead area structure of pneumatic tire for improved chafer cracking resistance during run-flat operation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE304456T1 (en) * | 2001-05-21 | 2005-09-15 | Michelin Soc Tech | Pneumatic TIRE WITH A CARCASS CONTAINING DUAL ANCHORMENTS |
| JP4514549B2 (en) * | 2004-08-09 | 2010-07-28 | 東洋ゴム工業株式会社 | Run-flat tire and manufacturing method thereof |
| EP1795376B1 (en) * | 2004-09-09 | 2010-02-24 | Toyo Tire & Rubber Co. Ltd. | Run flat tire and method of manufacturing run flat tire |
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2005
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086649C (en) * | 1997-05-29 | 2002-06-26 | 固特异轮胎和橡胶公司 | Tire with composite ply structure and method of manufacture |
| JP2003191722A (en) * | 2001-12-06 | 2003-07-09 | Goodyear Tire & Rubber Co:The | Bead area structure of pneumatic tire for improved chafer cracking resistance during run-flat operation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101137495A (en) | 2008-03-05 |
| JP4507920B2 (en) | 2010-07-21 |
| JP2006247929A (en) | 2006-09-21 |
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