CA1082863A - Method of building a radial tire - Google Patents
Method of building a radial tireInfo
- Publication number
- CA1082863A CA1082863A CA297,414A CA297414A CA1082863A CA 1082863 A CA1082863 A CA 1082863A CA 297414 A CA297414 A CA 297414A CA 1082863 A CA1082863 A CA 1082863A
- Authority
- CA
- Canada
- Prior art keywords
- tire
- belt structure
- tire casing
- tread
- beltless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
-
- 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
- B29D30/0005—Pretreatment of tyres or parts thereof, e.g. preheating, irradiation, precuring
-
- 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
-
- 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)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D30/54—Retreading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/001—Shaping in several steps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A METHOD OF BUILDING A RADIAL TIRE
Abstract of the Disclosure A method of building a radial tire by first molding and vulcanizing a beltless radial tire casing which can be composed of carcass plies, tire beads, sidewall and undertread stock. A narrow, inextensible band is centrally disposed around the outer periphery of the beltless tire.
m e band is narrow enough not to radically change the operational characteristics of the belt structure, but wide enough to restrict expansion of the tire casing beyond a desired diameter for receiving the belt structure and tread.
A belt structure composed of a plurality of belt plies, separate from the narrow band, is then positioned around the tire after which a tread is secured around the belt structure. The assembly of tire casing, band, belt struc-ture, and tread is then placed in a mold where the belt structure and tread are molded and vulcanized.
Abstract of the Disclosure A method of building a radial tire by first molding and vulcanizing a beltless radial tire casing which can be composed of carcass plies, tire beads, sidewall and undertread stock. A narrow, inextensible band is centrally disposed around the outer periphery of the beltless tire.
m e band is narrow enough not to radically change the operational characteristics of the belt structure, but wide enough to restrict expansion of the tire casing beyond a desired diameter for receiving the belt structure and tread.
A belt structure composed of a plurality of belt plies, separate from the narrow band, is then positioned around the tire after which a tread is secured around the belt structure. The assembly of tire casing, band, belt struc-ture, and tread is then placed in a mold where the belt structure and tread are molded and vulcanized.
Description
108~8~3 Back~round of the Invention me invention is designed for use in the production of radial tires~ espeeially radial truck tires having a belt structure of metal reinforcement cords.
Briefly stated~ the inve~tio~ ineludes a method of buildlng a radial tire~ comprising the steps of: molding and vuleanizing a beltless tire casing including: at least one eareass ply reinforeed with radially oriented cords~ and at least one pair of inextensible beads secured to said carcass ply; positioning an unvulcanized belt structure~ composed of at least one belt ply of unvulcanized rubber material reinforced with tire cords~ circumferentially around the outer periphery of the previously molded and vulcanized beltless~ tire casing;
plaeing a tread eireumferentially around the belt structure positioned on the beltless tire casing; eireumferentially inter-posing between the belt strueture and outer periphery of the prevlously molded and vuleanized beltless tire easing9 a narrow substantially~ inextensible~ restrictor band which is separate from the belt strueture~ the restrietor band being narrow enough not to radieally ehange the operational eharaeteristics of the belt strueture and wide enough to restriet expansion of the previously molded and vulc~n;zed beltless tire casing beyond a desired diameter correlated to the overall diameter of the tire when molded~ vulcanized~ and inflated; and vulcanizing any unvuleanized eomponents of the tire~ ineluding the belt strueturev The teehnology employed in the invention is somewhat similar to that described in U. S. Patent ~092~196~ issued May 30~ 1978~ on the retreading and rebuilding of a radial tire~
rather than in the formation of a new tire. The invention~as indicated above~ also envisions the use of a precured tread in combination with an unvulcanized belt structure.
..
,~, 1082863 Descri~tion of the Drawin~
m e following description of the invention will be better understood by having re~erence to the annexed drawing~ wherein:
Fig 1 is a section of a radial tire made in accordance with the invention;
~ lA-`~'`' :
Fig. 2 is a section of a beltless radial tire casing and mold in which the casing is molded and vulcanized; and Fig. 3 is a section of the upper portion of a radial tire, including the preformed casing, and mold in which the belt structure and tread are molded and vulcanized onto the tire casing.
petailed DescriPtion of the Drawin~
With reference to Fig. 1 of the drawing~ there is shown a radial tire 5 which essentially comprises conventional com-ponents of an innerliner 6; a single~ or plurality of carcassplies 7,8 reinforced with radially oriented parallel cords composed of rayon~ nylon~ polyester~ aramid~ or steel; a belt structure 9 for annularly reinforcing the radial tire 5, the belt structure composed of a plurality of belt plies 10~11 which are in superimposed relation and which are reinforced by parallel cords composed of rayon~ nylon~ polyester~ glass~
aramid~ or steel; and a tread 12 and pair of sidewalls 13~1~
surrounding the carcass plies 13~1~ and terminating at a pair of inextensible annular beads 15~16. A narrow~ inextensible band 17 is centrally disposed around the radial tire 5 inter-mediate the belt structure 9 and radially outermost carcass ply 8.
The belt plies 10~ in the case of larger tires for trucks~ for example~ are reinforced with parallel aramid or metal cords that are disposed at similar angles in the broad range of from 0 to 90 degrees measured relative to a plane containing the mid-circumferential centerline of the tread 12~ when the tire is molded~ vulcanized~ and uninflat~d, such plane hereinafter and in the claims referred to as the centerplane, and in the narrower preferred range of from .
15 to 80 degrees relative to the centerplane. me reinforce- -ment cords of the successive belt plies lO,ll extend in different directions from the centerplane~ but at similar angles, although in some cases the cord angle can vary from 5 ply to ply, In the case of passenger tires~ the reinforce-ment cords of the belt plies 10~11 are disposed at angles in the broad range of 0 to 30 degrees and in the narrower~
preferred range of 15 to 26 degrees relative to the center-plane. me reinforcement cords of the carcass plies 7~8 are radially oriented~ i.e. disposed at angles in the range of from 75 to 90 degrees measured relative to the centerplane.
A pair of rubber wedge strips 18~19 are provided to transversely flatten the belt structure 9 so that it is in cylindrical relation about the center axis of the radial tire 5, The radial tire 5 is mounted on a conventional wheel rim 20.
Wlth reference to Fig. 2~ there is shown a beltless~
radial tlre casing 21 which is utilized in the formation of the radial tire 5~ as shown in Fig. 1. m e tire casing 21 contains essentially all of the components of the radial tire 5 with the exception of the belt structure 9 and tread 12. The tire casing 21 can be formed without the sidewalls 13,14 and undertread 22. However~ it has been found more desirable to mold the tire casing 21 with these particular components. Thus~ it can be appreciated that the radial tire 5 is almost completely molded and vulcanized except for the belt structure 9 and tread 12.
m e unvulcanized tire casing 21 is conventionally built~ as by the flat band method~ after which it is placed in a conventional mold 23 where the tire casing 21 is molded and vulcanized, The outer peripheral surface 2~ of the tire casing 21 can be moldsd smooth or with circumferential grooves which provide a mechanical innerlock of the later applied tread 12 with the preformed tire casing 21, me overall diameter D of the tire casing 21 can be easily computed ~or any given tire, This information is necessary~ since it is important to restrict the tire casing to this particular dia-meter D for receipt of the later applied unvulcanized belt structure 9 and tread 12~ so that the overall diameter of the finished tire will be essentially the same as that of a similar-ly sized tire which is conventionally molded and vulcanized in a mold, After the tire casing 21 is completely molded and vul-canized and removed from the mold 23~ it is ready for receipt of the belt structure 9 and tread 12 which can be accomplished in a number of ways, For example~ the preformed tire casing 21 is mounted on the wheel rim 20 and inflated to the desired diameter D, The narrow restrictor band 17 is centrally dis-posed around the smooth outer peripheral surface 24 which isusually roughened slightly to enhance the bonding of the belt structure 9 and tread 12 to the tire casing 21, The narrow restrictor band 17, as previously indicated~ is designed so that it will restrict radial expansion of the tire casing 21 without adversely affecting the operational characteristics of the belt structure 9, It can be appreciated that the width of the restrictor band 17 naturally depends on the size of the radial tire 5, It is good to maintain the width of the res-trictor band 17 in the range of from 5 to 15 percent of the section diameter SD of the tire ~ A one-inch wide restrictor band 17 was found especially suitable for a size 10:00-20 tire.
The restrlctor band 17 is composed of inextensible cords comp~sed of material such as glass fibers~ metal~ or aramid.
The cords are parallel and extend longitudinally of the restrictor band 17 me ends of the restrictor band 17 are usually overlapped about 1-~ inches rather than being abutted.
A smaller width restrictor band 17, e.g. one-half inch~ can be spirally wound twice around the outer peripheral surface 24 of the tire casing 21 to form, for example~ the one-inch wide restrictor band 17 used in the popular size tire indicated above. Thus~ the restrictor band 17 can be made in a number of ways~ so long as it is kept narrow enough not to adversely affect the operational characteristics of the belt structure 9.
me belt structure 9 is always unvulcanized when applied to the tire casing 21, but the tread 12~ although usually composed of unvulcanized rubber material, can be a previously molded and vulcanized tread~ in which case con-ventional adhesives are used to increase the bond betweenthe preformed tread 12 and tire casing 21. When using a precured tread~ it is advantageous to use the so-called "hot" process of permanently bonding the precured tread and belt structure to the tire casing~ i.e. heating the assembly of the preformed tire casing 21 and tread 12 and unvulcanized components of belt structure 9~ restrictor band 17~ and bonding layer conventionally used when precured treads are used~ in an atmosphere of steam or air which is heated to a temperature of 200 degrees F. or more, as dis-1~8Z863 tinguished from the so-called "cold" process, where the precured tread is bonded to a tire casing at room~ or slightly elevated room temperatures.
Ag best seen in Fig. 3~ the assembly of a preformed tire casing 21~ unvulcanized~ partially vulcanized~ or vulcanized restrictor band 17~ unvulcanized belt structure 9~ and unvulcanized tread 25 are positioned within another mold 26 where the unvulcanized components are vulcanized and a pattern of ribs and grooves are molded into the outer surface 27 of the tread 25. The use of a restrictor band 17 in this situation is particularly advantageous~ because it keeps the beltless tire casing 21 from ballooning out into the mold 26~ whereby the finish molded and vulcanized tire becomes distorted from a desired shape.
An alternate method of using a restrictor band 17 in the building of a radial tire~ is to initially build the restrictor band 17 into the beltless tire casing 21~ In such a method the unvulcanized tire casing 21 is toroidally shaped to receive an unvulcanized restrictor band 17 which~
depending on the final shaping of the tire casing 21~ has reinforcement cords disposed at angles in the range of from zero to 10 degrees relative to the centerplane. Usually, even a toroidally shaped tire casing 21 requires further -expansion during the molding and vulcanization process.
Therefore~ the cords may be at a slight angle~ relative to the centerplane~ to allow furth~r limited expansion of the tire casing 21 necessary to the complete formation of the tire casing 21~ Another way of accomplishing this is to use cords~ such as rayon~ which are circumferentially oriented - . -lOB2863 around the tire casing 21 and which are slightly expansible or elongatable, rmus~ there has been provided a method of building a radial tire of a preformed tire casing to which i9 later added the belt structure and tread,
Briefly stated~ the inve~tio~ ineludes a method of buildlng a radial tire~ comprising the steps of: molding and vuleanizing a beltless tire casing including: at least one eareass ply reinforeed with radially oriented cords~ and at least one pair of inextensible beads secured to said carcass ply; positioning an unvulcanized belt structure~ composed of at least one belt ply of unvulcanized rubber material reinforced with tire cords~ circumferentially around the outer periphery of the previously molded and vulcanized beltless~ tire casing;
plaeing a tread eireumferentially around the belt structure positioned on the beltless tire casing; eireumferentially inter-posing between the belt strueture and outer periphery of the prevlously molded and vuleanized beltless tire easing9 a narrow substantially~ inextensible~ restrictor band which is separate from the belt strueture~ the restrietor band being narrow enough not to radieally ehange the operational eharaeteristics of the belt strueture and wide enough to restriet expansion of the previously molded and vulc~n;zed beltless tire casing beyond a desired diameter correlated to the overall diameter of the tire when molded~ vulcanized~ and inflated; and vulcanizing any unvuleanized eomponents of the tire~ ineluding the belt strueturev The teehnology employed in the invention is somewhat similar to that described in U. S. Patent ~092~196~ issued May 30~ 1978~ on the retreading and rebuilding of a radial tire~
rather than in the formation of a new tire. The invention~as indicated above~ also envisions the use of a precured tread in combination with an unvulcanized belt structure.
..
,~, 1082863 Descri~tion of the Drawin~
m e following description of the invention will be better understood by having re~erence to the annexed drawing~ wherein:
Fig 1 is a section of a radial tire made in accordance with the invention;
~ lA-`~'`' :
Fig. 2 is a section of a beltless radial tire casing and mold in which the casing is molded and vulcanized; and Fig. 3 is a section of the upper portion of a radial tire, including the preformed casing, and mold in which the belt structure and tread are molded and vulcanized onto the tire casing.
petailed DescriPtion of the Drawin~
With reference to Fig. 1 of the drawing~ there is shown a radial tire 5 which essentially comprises conventional com-ponents of an innerliner 6; a single~ or plurality of carcassplies 7,8 reinforced with radially oriented parallel cords composed of rayon~ nylon~ polyester~ aramid~ or steel; a belt structure 9 for annularly reinforcing the radial tire 5, the belt structure composed of a plurality of belt plies 10~11 which are in superimposed relation and which are reinforced by parallel cords composed of rayon~ nylon~ polyester~ glass~
aramid~ or steel; and a tread 12 and pair of sidewalls 13~1~
surrounding the carcass plies 13~1~ and terminating at a pair of inextensible annular beads 15~16. A narrow~ inextensible band 17 is centrally disposed around the radial tire 5 inter-mediate the belt structure 9 and radially outermost carcass ply 8.
The belt plies 10~ in the case of larger tires for trucks~ for example~ are reinforced with parallel aramid or metal cords that are disposed at similar angles in the broad range of from 0 to 90 degrees measured relative to a plane containing the mid-circumferential centerline of the tread 12~ when the tire is molded~ vulcanized~ and uninflat~d, such plane hereinafter and in the claims referred to as the centerplane, and in the narrower preferred range of from .
15 to 80 degrees relative to the centerplane. me reinforce- -ment cords of the successive belt plies lO,ll extend in different directions from the centerplane~ but at similar angles, although in some cases the cord angle can vary from 5 ply to ply, In the case of passenger tires~ the reinforce-ment cords of the belt plies 10~11 are disposed at angles in the broad range of 0 to 30 degrees and in the narrower~
preferred range of 15 to 26 degrees relative to the center-plane. me reinforcement cords of the carcass plies 7~8 are radially oriented~ i.e. disposed at angles in the range of from 75 to 90 degrees measured relative to the centerplane.
A pair of rubber wedge strips 18~19 are provided to transversely flatten the belt structure 9 so that it is in cylindrical relation about the center axis of the radial tire 5, The radial tire 5 is mounted on a conventional wheel rim 20.
Wlth reference to Fig. 2~ there is shown a beltless~
radial tlre casing 21 which is utilized in the formation of the radial tire 5~ as shown in Fig. 1. m e tire casing 21 contains essentially all of the components of the radial tire 5 with the exception of the belt structure 9 and tread 12. The tire casing 21 can be formed without the sidewalls 13,14 and undertread 22. However~ it has been found more desirable to mold the tire casing 21 with these particular components. Thus~ it can be appreciated that the radial tire 5 is almost completely molded and vulcanized except for the belt structure 9 and tread 12.
m e unvulcanized tire casing 21 is conventionally built~ as by the flat band method~ after which it is placed in a conventional mold 23 where the tire casing 21 is molded and vulcanized, The outer peripheral surface 2~ of the tire casing 21 can be moldsd smooth or with circumferential grooves which provide a mechanical innerlock of the later applied tread 12 with the preformed tire casing 21, me overall diameter D of the tire casing 21 can be easily computed ~or any given tire, This information is necessary~ since it is important to restrict the tire casing to this particular dia-meter D for receipt of the later applied unvulcanized belt structure 9 and tread 12~ so that the overall diameter of the finished tire will be essentially the same as that of a similar-ly sized tire which is conventionally molded and vulcanized in a mold, After the tire casing 21 is completely molded and vul-canized and removed from the mold 23~ it is ready for receipt of the belt structure 9 and tread 12 which can be accomplished in a number of ways, For example~ the preformed tire casing 21 is mounted on the wheel rim 20 and inflated to the desired diameter D, The narrow restrictor band 17 is centrally dis-posed around the smooth outer peripheral surface 24 which isusually roughened slightly to enhance the bonding of the belt structure 9 and tread 12 to the tire casing 21, The narrow restrictor band 17, as previously indicated~ is designed so that it will restrict radial expansion of the tire casing 21 without adversely affecting the operational characteristics of the belt structure 9, It can be appreciated that the width of the restrictor band 17 naturally depends on the size of the radial tire 5, It is good to maintain the width of the res-trictor band 17 in the range of from 5 to 15 percent of the section diameter SD of the tire ~ A one-inch wide restrictor band 17 was found especially suitable for a size 10:00-20 tire.
The restrlctor band 17 is composed of inextensible cords comp~sed of material such as glass fibers~ metal~ or aramid.
The cords are parallel and extend longitudinally of the restrictor band 17 me ends of the restrictor band 17 are usually overlapped about 1-~ inches rather than being abutted.
A smaller width restrictor band 17, e.g. one-half inch~ can be spirally wound twice around the outer peripheral surface 24 of the tire casing 21 to form, for example~ the one-inch wide restrictor band 17 used in the popular size tire indicated above. Thus~ the restrictor band 17 can be made in a number of ways~ so long as it is kept narrow enough not to adversely affect the operational characteristics of the belt structure 9.
me belt structure 9 is always unvulcanized when applied to the tire casing 21, but the tread 12~ although usually composed of unvulcanized rubber material, can be a previously molded and vulcanized tread~ in which case con-ventional adhesives are used to increase the bond betweenthe preformed tread 12 and tire casing 21. When using a precured tread~ it is advantageous to use the so-called "hot" process of permanently bonding the precured tread and belt structure to the tire casing~ i.e. heating the assembly of the preformed tire casing 21 and tread 12 and unvulcanized components of belt structure 9~ restrictor band 17~ and bonding layer conventionally used when precured treads are used~ in an atmosphere of steam or air which is heated to a temperature of 200 degrees F. or more, as dis-1~8Z863 tinguished from the so-called "cold" process, where the precured tread is bonded to a tire casing at room~ or slightly elevated room temperatures.
Ag best seen in Fig. 3~ the assembly of a preformed tire casing 21~ unvulcanized~ partially vulcanized~ or vulcanized restrictor band 17~ unvulcanized belt structure 9~ and unvulcanized tread 25 are positioned within another mold 26 where the unvulcanized components are vulcanized and a pattern of ribs and grooves are molded into the outer surface 27 of the tread 25. The use of a restrictor band 17 in this situation is particularly advantageous~ because it keeps the beltless tire casing 21 from ballooning out into the mold 26~ whereby the finish molded and vulcanized tire becomes distorted from a desired shape.
An alternate method of using a restrictor band 17 in the building of a radial tire~ is to initially build the restrictor band 17 into the beltless tire casing 21~ In such a method the unvulcanized tire casing 21 is toroidally shaped to receive an unvulcanized restrictor band 17 which~
depending on the final shaping of the tire casing 21~ has reinforcement cords disposed at angles in the range of from zero to 10 degrees relative to the centerplane. Usually, even a toroidally shaped tire casing 21 requires further -expansion during the molding and vulcanization process.
Therefore~ the cords may be at a slight angle~ relative to the centerplane~ to allow furth~r limited expansion of the tire casing 21 necessary to the complete formation of the tire casing 21~ Another way of accomplishing this is to use cords~ such as rayon~ which are circumferentially oriented - . -lOB2863 around the tire casing 21 and which are slightly expansible or elongatable, rmus~ there has been provided a method of building a radial tire of a preformed tire casing to which i9 later added the belt structure and tread,
Claims (8)
1. A method of building a radial tire, comprising the steps of:
(a) molding and vulcanizing a beltless tire casing including:
(I) at least one carcass ply reinforced with radially oriented cords, and (II) at least one pair of inextensible beads secured to said carcass ply;
(b) positioning an unvulcanized belt sturcture, composed of at least one belt ply of unvulcanized rubber material reinforced with tire cords, circumferentially around the outer periphery of the previously molded and vulcanized beltless, tire casing;
(c) placing a tread circumferentially around the belt structure positioned on the beltless tire casing;
(d) circumferentially interposing between the belt structure and outer periphery of the previously molded and vulcanized beltless tire casing, a narrows sub-stantially, inextensible, restrictor band which is separate from the belt structure, the restrictor band being narrow enough not to radically change the operational characteristics of the belt structure and wide enough to restrict expansion of the previously molded and vulcanized beltless tire casing beyond a desired diameter correlated to the overall diameter of the tire when molded, bulcanized, and inflated; and (e) vulcanizing any unvulcanized components of the tire, including the belt structure
(a) molding and vulcanizing a beltless tire casing including:
(I) at least one carcass ply reinforced with radially oriented cords, and (II) at least one pair of inextensible beads secured to said carcass ply;
(b) positioning an unvulcanized belt sturcture, composed of at least one belt ply of unvulcanized rubber material reinforced with tire cords, circumferentially around the outer periphery of the previously molded and vulcanized beltless, tire casing;
(c) placing a tread circumferentially around the belt structure positioned on the beltless tire casing;
(d) circumferentially interposing between the belt structure and outer periphery of the previously molded and vulcanized beltless tire casing, a narrows sub-stantially, inextensible, restrictor band which is separate from the belt structure, the restrictor band being narrow enough not to radically change the operational characteristics of the belt structure and wide enough to restrict expansion of the previously molded and vulcanized beltless tire casing beyond a desired diameter correlated to the overall diameter of the tire when molded, bulcanized, and inflated; and (e) vulcanizing any unvulcanized components of the tire, including the belt structure
2. The method of Claim 1, wherein the restrictor band is composed of rubber material reinforced with cords which are disposed at angles in the range of from zero to 10 degrees relative to the centerplane.
3. The method of Claim 2, which includes molding and vulcanizing the restrictor band into the beltless tire casing during the molding and vulcanization thereof, prior to the receipt thereby of the unvulcanized belt structure and tread.
4. The method of Claim 3, which includes toroidally shaping the unvulcanized tire casing to a predetermined desired diameter to receive the restrictor band.
5. The method of Claim 2m wherein the tread is unvulcanized, prior to positioning on the tire casing.
6. The method of Claim 2, wherein the tread is pre-viously molded and vulcanized, prior to positioning on the tire casing.
7. The method of Claim 2, wherein the restrictor band is reinforced with cords which extend circumferentially of the tire and which are composed of materials of the group of glass, metal, and aramid.
8. The method of Claim 2, wherein the radially oriented cords of the said at least one carcass ply are composed of material of the group of rayon, nylon, polyester, glass, aramid, and metal, and the reinforcement cords of the belt structure are composed of material of the group of glass, aramid, and metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78221477A | 1977-03-28 | 1977-03-28 | |
| US782,214 | 1977-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1082863A true CA1082863A (en) | 1980-08-05 |
Family
ID=25125362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA297,414A Expired CA1082863A (en) | 1977-03-28 | 1978-02-21 | Method of building a radial tire |
Country Status (7)
| Country | Link |
|---|---|
| AU (1) | AU514919B2 (en) |
| BR (1) | BR7801630A (en) |
| CA (1) | CA1082863A (en) |
| DE (1) | DE2813702A1 (en) |
| FR (1) | FR2385518A1 (en) |
| GB (1) | GB1601100A (en) |
| LU (1) | LU79245A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2452390A1 (en) * | 1979-03-29 | 1980-10-24 | Michelin & Cie | RADIAL CARCASS TIRE |
| JPH0798367B2 (en) * | 1990-12-14 | 1995-10-25 | 株式会社ブリヂストン | Pneumatic radial tire rehabilitation method |
| EP0533085A1 (en) * | 1991-09-19 | 1993-03-24 | Michelin Recherche Et Technique | Tire structure for improved tread life |
| JP5815914B2 (en) * | 2008-10-21 | 2015-11-17 | 株式会社ブリヂストン | Tire manufacturing method |
| DE112011105480B4 (en) * | 2011-07-29 | 2016-02-11 | The Yokohama Rubber Co., Ltd | tire |
| CN107627638B (en) * | 2017-09-28 | 2023-12-15 | 北京化工大学 | Tire direct-pressure vulcanization gradual change molding equipment and process |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE553880A (en) * | 1956-02-16 | Michelin & Cie | ||
| FR1214031A (en) * | 1958-02-21 | 1960-04-05 | Gummiwerke Fulda K G A A | Cover for pneumatic tires |
| NL257423A (en) * | 1959-10-23 | |||
| NL280535A (en) * | 1961-08-14 | |||
| FR1331582A (en) * | 1962-05-25 | 1963-07-05 | Kleber Colombes | Process for manufacturing tires and tires conforming to those obtained |
| FR1544935A (en) * | 1966-11-15 | 1968-11-08 | Dunlop Co Ltd | Improvements to tire manufacturing processes |
| US4092196A (en) * | 1976-03-22 | 1978-05-30 | The Goodyear Tire & Rubber Company | Retreading and rebuilding of radial tires |
-
1978
- 1978-02-20 GB GB658678A patent/GB1601100A/en not_active Expired
- 1978-02-21 CA CA297,414A patent/CA1082863A/en not_active Expired
- 1978-03-01 AU AU33716/78A patent/AU514919B2/en not_active Expired
- 1978-03-09 FR FR7806777A patent/FR2385518A1/en active Granted
- 1978-03-16 LU LU79245A patent/LU79245A1/en unknown
- 1978-03-17 BR BR7801630A patent/BR7801630A/en unknown
- 1978-03-28 DE DE19782813702 patent/DE2813702A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2813702C2 (en) | 1987-12-17 |
| DE2813702A1 (en) | 1978-10-12 |
| AU3371678A (en) | 1979-09-06 |
| AU514919B2 (en) | 1981-03-05 |
| LU79245A1 (en) | 1978-06-29 |
| GB1601100A (en) | 1981-10-21 |
| FR2385518B1 (en) | 1983-12-02 |
| FR2385518A1 (en) | 1978-10-27 |
| BR7801630A (en) | 1978-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |