CN107650402B - Mechanical forming drum of radial tire for run-flat riding - Google Patents
Mechanical forming drum of radial tire for run-flat riding Download PDFInfo
- Publication number
- CN107650402B CN107650402B CN201710871926.1A CN201710871926A CN107650402B CN 107650402 B CN107650402 B CN 107650402B CN 201710871926 A CN201710871926 A CN 201710871926A CN 107650402 B CN107650402 B CN 107650402B
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- China
- Prior art keywords
- adsorption
- ring
- drum
- cover plate
- curved surface
- 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.)
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Links
- 238000001179 sorption measurement Methods 0.000 claims abstract description 64
- 239000003292 glue Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000002131 composite material Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000012856 packing Methods 0.000 description 5
- 238000004513 sizing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 241000208967 Polygala cruciata Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
Classifications
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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
-
- 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
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
-
- 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
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
- B29D2030/2671—Holding the layers, e.g. the webs or the plies, in position onto the drum
- B29D2030/2692—Holding the layers, e.g. the webs or the plies, in position onto the drum by using suction means, e.g. vacuum producing devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
Abstract
A radial tire mechanical forming drum for run-flat riding comprises a main shaft, left and right roller screws arranged on the main shaft, a sidewall turn-up device arranged on the main shaft, a rim locking device and a rim limiting device for preventing the rim from sliding inwards of the drum; the part of the drum surface of the forming drum, which is attached with the supporting glue, is a curved surface, and the curved surface is formed by an adsorption ring with a circle of adsorption ports, a telescopic ring which is positioned at the adsorption ports and is inclined at one side close to the vertical center of the main shaft, and a rubber ring which is positioned at the other side of the adsorption ports and is provided with a curved surface part. The invention has the beneficial effects of greatly improving the overall uniformity of the tire and improving the quality of the tire.
Description
Technical Field
The invention belongs to the technical field of tire building, and particularly relates to a mechanical building drum of a run-flat passenger radial tire.
Background
The run-flat radial tire can be used normally after the air leaks completely, and is also called a run-flat tire or a zero-pressure tire. Currently, run-flat tires on the market are mainly achieved by adding a layer of support glue at the sidewalls to increase the sidewall thickness and rigidity. The part of the existing forming drum surface, which is adhered with the supporting glue, is a concave curved surface, and the curved surface is formed by tightly wrapping the glue ring on the swing blocks which are tightly arranged in the circumferential direction.
Since the length of the liner composite is uniform during cutting, but the circumference of the curved surface on the drum head is smaller than the circumference of the flat surface, when the liner sidewall composite is cut according to the length of the flat surface, the length of the liner at the curved surface is larger than the circumference of the drum at the curved surface. When the lining composite piece is attached, the sizing material at the curved surface is suspended above the curved surface, and when the supporting sizing material is attached, the lining at the curved surface can be pressed onto the drum surface by the supporting sizing material. And after the supporting glue is stuck, excessive lining layer glue stock at the curved surface is accumulated at the joint, so that the thickness of the glue stock at the joint is increased, the whole weight of the tire is uneven, and the quality of the tire is affected.
Disclosure of Invention
In order to solve the technical problems, the invention provides a mechanical building drum of a run-flat radial tire, and aims to solve the problems of poor uniformity, low efficiency and the like of the conventional one-time run-flat radial tire building drum.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
A radial tire mechanical forming drum for run-flat riding comprises a main shaft, left and right ball screws arranged on the main shaft, a sidewall turn-up device arranged on the main shaft, a rim locking device and a rim limiting device for preventing the rim from sliding towards the inner side of the drum; the part of the drum surface of the forming drum, which is attached with the supporting glue, is a curved surface, and the curved surface is formed by an adsorption ring with a circle of adsorption ports, a telescopic ring which is positioned on one side of the adsorption ports, which is close to the vertical center of the main shaft, and is provided with a curved surface part, and a rubber ring which is positioned on the other side of the adsorption ports and is provided with a curved surface part.
Compared with the prior art, this scheme has set up the shaping drum based on the design of vacuum adsorption, is equipped with the absorption mouth at drum head circumferencial direction, and absorption mouth and expansion ring, rubber ring constitute the absorption curved surface simultaneously for inside lining side wall complex can be even paste on the absorption curved surface, and the curved surface department can evenly distributed in the circumference interval department of absorption mouth owing to the unnecessary inside lining sizing material that the girth reduces and causes, improves the overall homogeneity of tire greatly, improves tire quality.
Based on the scheme, the invention also makes the following improvements:
The mechanical forming drum further comprises an adsorption gas circuit, wherein the adsorption gas circuit comprises a vacuum generator, and a gas source I and a gas source II which are respectively connected with a gas inlet and a gas outlet of the vacuum generator; the gas path at the adsorption port of the vacuum generator is divided into two paths, one path is directly connected to the adsorption port of the drum surface, and the other path is connected to the adsorption port of the drum surface after passing through the vacuum check valve; the air source I is used for supplying air to the vacuum generator when the inner side wall composite part is attached; the air source II is used for cutting off the exhaust port of the vacuum generator when the middle drum is inflated. In the improvement scheme, two air sources and two adsorption ports are arranged, one of the adsorption ports is connected with a vacuum check valve to weaken the suction force, in the adsorption process, the adsorption port which is not connected with the vacuum check valve is firstly contacted with the lining layer rubber material to adsorb the lining layer on the drum surface, and the adsorption port which is connected with the vacuum check valve is contacted with the lining layer after the drum rotates for a certain angle to adsorb the lining layer on the drum surface; the problem of the absorption failure that a certain induction port gas leakage caused when a single air source should adsorb at different moments of a plurality of absorption ports is solved. The air supply port of the vacuum generator is opened and closed by a middle-sealed electromagnetic valve on the machine case of the forming machine, and the air exhaust port is opened and closed by a two-position two-way valve. The air source II realizes the opening and closing of the exhaust port of the vacuum generator by controlling the opening and closing of the two-position two-way valve; the problem of in the drum gas leak through the adsorption port when the drum is inflated has been solved.
The rubber ring comprises a plane part and a curved surface part, the plane part covers the steel ring locking device, and the curved surface part covers the steel ring limiting block.
The steel ring locking device comprises a conical locking piece for coating the rubber ring and a conical piston for pushing the conical locking piece to act. This improvement scheme is used for locking the steel ring, and the toper piston promotes toper locking piece action, and toper locking piece outwards expands tensioning steel ring, simple structure is stable.
The steel ring limiting device comprises a limiting block, a piston I and a connecting rod connected with the piston I and the limiting block. This improvement scheme is after the steel ring locking, and piston I promotes the stopper inflation through the connecting rod, prevents that the steel ring from sliding to the drum inboard from the locking piece, can make the sizing material of cladding steel ring and steel ring in close contact simultaneously, eliminates the bubble of steel ring department.
The telescopic ring is also provided with a horizontal plane, and a cover plate telescopic device is arranged in the vertical center of the main shaft; the cover plate telescoping device comprises a cover plate bracket, wherein the cover plate bracket is provided with a middle cover plate, a guide rod used for guiding the cover plate bracket to move, and a compression spring is sleeved on the guide rod; the middle cover plate is overlapped with the horizontal plane of the telescopic ring and does not cover the inclined plane of the telescopic ring. The improved scheme is to achieve smaller required contraction distance when the middle drum is inflated and the side drum is contracted; the telescopic ring can compress the connecting spring when the side drum is contracted and propped against the end face of the cover plate bracket, so that the required contraction distance is reached. After the shaping is finished, the telescopic ring returns to the original position under the elasticity of the spring when the side drum stretches back to the original position.
And 12 adsorption ports are uniformly distributed on the adsorption ring along the circumference. The improved technology is used for guaranteeing the adsorption effect and the uniformity of the whole tire.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the invention or of the prior art, the drawings used in the description of the embodiments or of the prior art will be briefly described below.
FIG. 1 is a schematic view of the overall structure of a mechanical building drum of the present invention;
FIG. 2 is a schematic view of a mechanical forming drumhead surface structure of the present invention;
FIG. 3 is a schematic diagram of an adsorption gas path of a mechanical forming drum according to the present invention;
In the figure, 1, a main shaft; 2. a ball screw; 3. a sidewall turn-up device; 4. a steel ring locking device; 5. a steel ring limiting device; 6. a cover plate telescoping device; 7. an adsorption ring; 8. an adsorption port; 9. a telescopic ring; 10. a rubber ring; 11. a vacuum generator; 12. a gas source I; 13. a gas source II; 14. a backing plate assembly; 15. a vacuum check valve; 16. two-position two-way pneumatic control valve; 31. a reverse wrapping rod; 32. a tension spring; 33. a magnetic chuck; 34. a sliding sleeve; 41. a conical locking piece; 42. a conical piston; 51. a limiting block; 52. a piston I; 53. a connecting rod; 61. a cover plate bracket; 62. an intermediate cover plate; 63. a guide rod; 64. compressing the spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 and 2, a radial tire mechanical forming drum for run-flat riding comprises a main shaft 1, left and right roller screws 2 arranged on the main shaft 1, a sidewall anti-packing device 3 arranged on the main shaft 1, a rim locking device 4 and a rim limiting device 5 for preventing the rim from sliding inwards of the drum, wherein the part of the drum surface of the forming drum, which is attached with supporting rubber, is a curved surface, and the forming drum comprises an adsorption ring 7 with a circle of adsorption ports 8, a telescopic ring 9 which is positioned at the adsorption ports 8 and is inclined at one side close to the vertical center of the main shaft, and a rubber ring 10 which is positioned at the other side of the adsorption ports 8 and is provided with a curved surface part. The adsorption ring 7 is provided with 12 adsorption ports 8 which are uniformly distributed along the circumference. The rubber ring 10 further comprises a plane part, the plane part is covered by the steel ring locking device 4, and the rubber ring of the curved surface part at the joint with the adsorption ring 7 is covered by the adsorption ring 7. The telescopic ring 9 is also provided with a horizontal plane, the vertical center of the main shaft is provided with a cover plate telescopic device 6, the cover plate telescopic device 6 comprises a cover plate bracket 61, a middle cover plate 62 is arranged on the cover plate bracket 61, a guide rod 63 for guiding the cover plate bracket 61 to move is arranged on the cover plate bracket 61, and a compression spring 64 is sleeved on the guide rod 63; the middle cover plate 62 overlaps the horizontal plane of the telescopic ring 9 and does not cover the inclined plane of the telescopic ring. The steel ring locking device 4 comprises a conical locking piece 41 for coating the rubber ring and a conical piston 41 for pushing the conical locking piece 41 to act. The steel ring limiting device 5 comprises a limiting block 51, a piston I52 and a connecting rod 53 for connecting the piston I and the limiting block. The left ball screw 2 and the right ball screw rotate, and the side drum is driven to shrink by a connecting key on the nut. The sidewall anti-packing device 3 consists of a circle of anti-packing rods 31 which are closely arranged in the circumferential direction, the anti-packing rods 31 are arranged on a magnetic sucker 33, and a plurality of extension springs 32 are tightly packed on the outer sides of the anti-packing rods; when the tire is reversely wrapped, the boosting disc pushes the magnetic chuck 33 to slide on the sliding sleeve 34, so that the reverse wrapping action is realized; the magnetic chuck 33 is composed of a disk to which the turn-up lever is mounted and a plurality of magnets mounted on the disk. The backing plate device 14 covering the roller on the reverse wrapping rod during material pasting comprises a tooth-shaped cylinder body and a piston II; the piston II is fixed, and the tooth-shaped cylinder body slides on the piston. When the materials are pasted, the tooth-shaped cylinder body covers the roller on the reverse wrapping rod; when the sticking is finished and the reverse wrapping is finished, the toothed cylinder block retreats and leaks out of the roller on the reverse wrapping rod.
As shown in fig. 3, the mechanical forming drum further comprises an adsorption gas path, wherein the adsorption gas path comprises 6 vacuum generators 11, and a gas source I12 and a gas source II13 which are respectively connected with a gas supply port and a gas exhaust port of the vacuum generators 11; the vacuum generator divides the adsorption gas path into two paths, one path is directly connected to the adsorption port of the drum surface, and the other path is connected to the adsorption port of the drum surface after passing through the vacuum check valve 15; the air source 1 is used for supplying air to the vacuum generator when the lining sidewall composite member is attached; the air source 2 is used for cutting off the exhaust port of the vacuum generator when the middle drum is inflated.
The working process of the adsorption gas circuit is as follows:
when the lining side wall composite part is attached, an air source 1 supplies air, 6 paths of air are separated and respectively connected with air inlets of 6 vacuum generators, air outlets of the 6 vacuum generators are combined into one path of air and then are connected with a two-position two-way air control valve 16 to be exhausted, an air suction port of each vacuum generator is connected with two paths of adsorption ports, in the adsorption process, an adsorption port directly connected with a drum surface is firstly contacted with a lining rubber material to adsorb the lining on the drum surface, and an adsorption port connected with a vacuum check valve is contacted with the lining after the drum rotates for a certain angle to adsorb the lining on the drum surface; the vacuum check valve functions in this air path as: when the adsorption port inhales, the gas path of the adsorption port is cut off, and after the adsorption port adsorbs an object, the gas path of the adsorption port is opened, and at the moment, the adsorption port can adsorb the object.
After the adhesive materials such as the inner liner are adhered, the inner liner is not required to be sucked by vacuum adsorption, so that the air source I is required to be cut off, and the middle sealing type electromagnetic valve is sealed. At the moment, the steel wire ring is locked, the air source II is ventilated, and the air source II props up the conical locking block by driving the conical piston to lock the steel wire ring; and the air source 2 is connected with a control air passage of the two-position two-way air control valve to seal the two-position two-way air control valve.
And then the middle drum is inflated, and the gas in the middle drum is connected with the adsorption port of the vacuum generator during inflation, and is connected to the gas supply port and the gas exhaust port of the vacuum generator through the adsorption port of the vacuum generator. In the scheme, the air supply port of the vacuum generator is sealed through the middle sealing type electromagnetic valve on the chassis, and the air exhaust port is sealed through the two-position two-way valve, so that the leakage from the vacuum generator can be avoided when the middle drum is inflated.
Claims (7)
1. The utility model provides a run-flat meridian tire mechanical building drum of taking advantage of, includes the main shaft, sets up at the epaxial left and right sides roller screw, sets up at the epaxial side wall anti-package device of main, rim locking device and prevents rim stop device that the rim slided to the drum inboard, its characterized in that: the part of the drum surface of the forming drum, which is attached with the supporting glue, is a curved surface, and the curved surface is formed by an adsorption ring with a circle of adsorption ports, a telescopic ring which is positioned at the adsorption ports and is inclined at one side close to the vertical center of the main shaft, and a rubber ring which is positioned at the other side of the adsorption ports and is provided with a curved surface part.
2. A mechanical building drum according to claim 1, wherein: the adsorption gas circuit comprises a plurality of vacuum generators, and a gas source I and a gas source II which are respectively connected with the gas inlet and the gas outlet of the vacuum generators; the gas circuit at the adsorption port of the vacuum generator is divided into two paths, one path is directly connected to the adsorption port of the drum surface, and the other path is connected to the adsorption port of the drum surface through a vacuum check valve; the air source I is used for supplying air to the vacuum generator when the inner side sidewall composite member is attached; the air source II is used for cutting off the exhaust port of the vacuum generator when the middle drum is inflated.
3. A mechanical building drum according to claim 1 or 2, characterized in that: the rubber ring also comprises a plane part, the plane part is covered by the steel ring locking device, and the rubber ring at the joint of the curved surface part and the adsorption ring is covered by the adsorption ring.
4. A mechanical building drum according to claim 3, wherein: the steel ring locking device comprises a conical locking piece for coating the rubber ring and a conical piston for pushing the conical locking piece to act.
5. A mechanical building drum according to claim 3, wherein: the steel ring limiting device comprises a limiting block, a piston I and a connecting rod connected with the piston I and the limiting block.
6. A mechanical building drum according to claim 1 or 2, characterized in that: the telescopic ring is also provided with a horizontal plane, and a cover plate telescopic device is arranged in the vertical center of the main shaft; the cover plate telescoping device comprises a cover plate bracket, wherein the cover plate bracket is provided with a middle cover plate, a guide rod used for guiding the movement of the cover plate bracket, and a compression spring is sleeved on the guide rod; the middle cover plate is overlapped with the horizontal plane of the telescopic ring and does not cover the inclined plane of the telescopic ring.
7. A mechanical building drum according to claim 1 or 2, characterized in that: and 12 adsorption ports are uniformly distributed on the adsorption ring along the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710871926.1A CN107650402B (en) | 2017-09-25 | 2017-09-25 | Mechanical forming drum of radial tire for run-flat riding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710871926.1A CN107650402B (en) | 2017-09-25 | 2017-09-25 | Mechanical forming drum of radial tire for run-flat riding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107650402A CN107650402A (en) | 2018-02-02 |
| CN107650402B true CN107650402B (en) | 2024-06-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710871926.1A Active CN107650402B (en) | 2017-09-25 | 2017-09-25 | Mechanical forming drum of radial tire for run-flat riding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107650402B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111002611A (en) * | 2019-12-26 | 2020-04-14 | 山东宏盛橡胶科技有限公司 | Building drum for run-flat |
| CN111674209B (en) * | 2020-06-16 | 2022-05-17 | 江苏通用科技股份有限公司 | All-steel radial tire belt tread composite part and laminating process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207388365U (en) * | 2017-09-25 | 2018-05-22 | 青岛软控机电工程有限公司 | A kind of run-flat riding radial tire mechanical assembly drum |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102046362B (en) * | 2008-04-18 | 2015-04-01 | 倍耐力轮胎股份公司 | Process and apparatus for building tyres |
| JP5281671B2 (en) * | 2011-05-12 | 2013-09-04 | 住友ゴム工業株式会社 | Shaping former for run-flat tires |
| US10857749B2 (en) * | 2013-08-01 | 2020-12-08 | Pirelli Tyre S.P.A. | Process and apparatus for building tyres for vehicle wheels and tyre for vehicle wheels |
| NL2014555B1 (en) * | 2014-10-13 | 2016-10-04 | Vmi Holland Bv | Method and drum for manufacturing a tyre, in particular a run-flat tyre. |
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- 2017-09-25 CN CN201710871926.1A patent/CN107650402B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207388365U (en) * | 2017-09-25 | 2018-05-22 | 青岛软控机电工程有限公司 | A kind of run-flat riding radial tire mechanical assembly drum |
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| CN107650402A (en) | 2018-02-02 |
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