An all-steel three-drum rotary pull reverse capsule structure

Abstract

An all-steel three-drum rotary pull reversed capsule structure belongs to the field of tire production technology. It includes a reversed barrel portion, a neck barrel portion, a tooth portion, and an outer material bonding portion. The shortest distance W1 between the film VII41 bonded to the outer material bonding portion and the inner side surface of the reversed capsule tooth portion is 40 mm; the shortest distance W2 between the film VIII42 bonded to the outer layer of film VII41 and the inner side surface of the reversed capsule tooth portion is 30 mm; and the shortest distance W3 between the film IX43 bonded to the outer layer of film VIII43 and the inner side surface of the reversed capsule tooth portion is 20 mm. The present invention adjusts the position and size of the bonded films to achieve the purpose of shortening the overall size of the capsule and moving the high point inward, thereby increasing the inflation height of the capsule, so that the high point of the capsule moves closer to the bead portion after inflation, and the tire body and the rubber core are bonded after inflation.

Description

Technical Field

[0001] The invention belongs to the technical field of tire production, and in particular relates to an all-steel three-drum rotary pull reverse capsule structure, which is applied to the tire embryo molding process. Background Art

[0002] Tires are essential components for vehicles like cars and trucks, and the performance of these vehicles is closely linked to the characteristics of the tires. Blanket building is a critical step in tire production, and the building drum is an essential piece of tooling for this process.

[0003] The conventional tire blank forming process on a three-drum building machine is as follows: 1. The tire barrel is transferred to the building drum with the drum in the flat width position; 2. The locking block props up the bladder for pre-inflation; 3. The crown is transferred to the building drum, where the barrel is inflated and the drum contracts to the over-set position, completing the barrel and crown composite; 4. The rubber core is pressed together and the bladder is slightly inflated again; 5. The crown is pressed together; 6. The turn-up bladder and the booster bladder are inflated to complete the sidewall turn-up; 7. The turn-up bladder and the booster bladder are vented; 8. The sidewall is pressed together; 9. The tire is unloaded. The bladder plays a crucial role in this entire process. The bladder's inflated shape, service life, and design dimensions directly impact tire blank quality. Currently, turn-up bladders are designed and manufactured according to traditional forming structures, resulting in low efficiency, uneven bead material, and a short service life. With the development and application of the new three-drum rotary turn-up technology, the corresponding three-drum rotary turn-up bladder design is of great significance. It aims to improve efficiency, enhance quality, reduce costs, and extend service life. Summary of the Invention

[0004] In response to the above-mentioned technical problems, in order to increase the service life of the bladder while ensuring uniform distribution of tire rim material, improving inflation and exhaust efficiency, and enhancing molding efficiency, the present invention provides an all-steel three-drum rotary pull-back bladder structure.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] The present invention discloses an all-steel three-drum rotary-drawn reverse-wrapped capsule structure, comprising a reverse-wrapped tube portion, a neck tube portion, a tooth portion, and an outer covering material bonding portion. One side between the reverse-wrapped tube portion and the neck tube portion is the tooth portion, and the other side between the outer end of the reverse-wrapped tube portion and the outer end of the neck tube portion is the outer covering material bonding portion. The tooth portion is a structure that cooperates with the mounting end of the forming drum. The shortest distance W1 between a film VII41 bonded to the outer covering material bonding portion and an inner side surface of the reverse-wrapped capsule tooth portion is 40±10 mm; the shortest distance W2 between a film VIII42 bonded to the outer layer of the film VII41 and the inner side surface of the reverse-wrapped capsule tooth portion is 30±10 mm; and the shortest distance W3 between a film IX43 bonded to the outer layer of the film VIII43 and the inner side surface of the reverse-wrapped capsule tooth portion is 20±10 mm.

[0007] Preferably, the length L1 of the film VII41 along the length direction of the reversed tube is 160±10 mm.

[0008] Preferably, the length L2 of the film VIII 42 along the length direction of the reversed tube is 160±10 mm.

[0009] Preferably, the length L3 of the film VIII 43 along the length direction of the reversed tube is 160±10 mm.

[0010] Preferably, the closest distance m between the end of the turn-up tube and the thread edge is 240±20 mm.

[0011] Preferably, the overall length L of the rotary-pulled reverse-wrapped capsule is 500 mm ± 30 mm.

[0012] The beneficial effects of the present invention are:

[0013] 1. The present invention is an improvement on the structure of the existing molded capsule. By adjusting the position and size of the film, the overall size of the capsule is shortened and the high point is moved inward. The inflation height of the capsule is increased, so that the high point of the capsule moves closer to the ring after inflation, and the carcass and the rubber core are in contact after inflation.

[0014] 2. The present invention does not cause tire sidewall damage during spinning and turning, and improves production efficiency, makes the ring material more uniform, and improves product quality.

[0015] 3. The overall size of the capsule of the present invention is reduced, and the amount of air used when inflated to the same height is reduced.

[0016] 4. The present invention can improve the use of the capsule to 10,000 times, thereby increasing the service life of the capsule. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the capsule of the present invention;

[0018] Figure 2 This is a partial schematic diagram of the cross section of the finished capsule of the present invention;

[0019] Figure 3 It is a schematic diagram of the inflation of the finished capsule of the present invention.

[0020] In the figure: 1. Turn-up tube part, 11. Film I, 12. Film II, 13. Curtain fabric I, 14. Vulcanized film I, 15. Curtain fabric II, 16. Film III, 17. Vulcanized film II, 18. Film IV;

[0021] 2. Neck, 21. Film V, 22. Curtain III, 23. Curtain IV, 24. Film VI;

[0022] 3. Tooth mouth, 31. Vulcanized film III, 32. Cord fabric V, 33. Filling strip, 34. Molded rubber;

[0023] 4. Outer packaging material bonding area, 41. Film VII, 42. Film VIII, 43. Film IX, 44. Film X, 45. High-elastic fabric I, 46. High-elastic fabric II, 47. Nylon mesh, 48. High-elastic fabric III, 49. Silicone;

[0024] 5. Existing capsule, 6. Rotate and pull the capsule back. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] Example: Figure 1 As shown, the present invention is an all-steel three-drum rotary-drawn reverse-wrapped capsule structure, comprising a reverse-wrapped tube portion, a neck tube portion, a tooth portion, and an outer material bonding portion. One side between the reverse-wrapped tube portion and the neck tube portion is the tooth portion, and the other side between the outer end of the reverse-wrapped tube portion and the outer end of the neck tube portion is the outer material bonding portion. The tooth portion is a structure that is installed and matched with the forming drum. The protruding end of the tooth portion is equivalent to a sealing ring that matches the groove of the corresponding portion of the forming drum to ensure the air pressure of the capsule in the inflated state when in use. The shortest distance W1 between the film VII41 bonded to the outer material bonding portion and the inner side surface of the reverse-wrapped capsule tooth portion is 40mm; the shortest distance W2 between the film VIII42 bonded to the outer layer of the film VII41 and the inner side surface of the reverse-wrapped capsule tooth portion is 30mm; and the shortest distance W3 between the film IX43 bonded to the outer layer of the film VIII43 and the inner side surface of the reverse-wrapped capsule tooth portion is 20mm.

[0027] In this example, the lengths L1, L2, and L3 of the films VII 41, VIII 42, and VIII 43 along the length direction of the reversed tube are all 160±2 mm.

[0028] In this example, the closest distance m between the end of the turn-up tube and the thread opening is 240±20 mm. The overall length L of the spin-pull turn-up capsule is 500 mm±30 mm.

[0029] The order of laminating the materials of each part in this example is the same as the existing laminating order, specifically the reversed tube part 1, the neck tube part 2, the tooth mouth part 3, and the outer material laminating part 4. The order of laminating the materials of each part is according to the illustrated sequence number of each part.

[0030] like Figure 3 As shown, in this example, the highest point H0 of the capsule 6 after the rotation and inversion of the capsule makes the highest point of the capsule after inflation close to about 160 mm in the direction of the ring (i.e., the two ends of the neck tube part). After inflation, the tire body and the rubber core are in contact, which is beneficial to the characteristics of fast and efficient inflation of the present invention, reaches the expected capsule height, and ensures that the material of the tire side and ring is uniform.

[0031] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the scope of protection of the present invention.

Claims

1. An all-steel three-drum rotary pull-up capsule structure, characterized by: It includes an inverted tube portion, a neck tube portion, a tooth portion, and an outer material bonding portion. One side between the inverted tube portion and the neck tube portion is the tooth portion, and the other side between the outer end of the inverted tube portion and the outer end of the neck tube portion is the outer material bonding portion. The tooth portion is a structure that cooperates with the mounting end of the forming drum. The shortest distance W1 between the film VII bonded to the outer material bonding portion and the inner side surface of the inverted capsule tooth portion is 40±10mm; the shortest distance W2 between the film VIII bonded to the outer layer of the film VII and the inner side surface of the inverted capsule tooth portion is 30±10mm; and the shortest distance W3 between the film IX bonded to the outer layer of the film VIII and the inner side surface of the inverted capsule tooth portion is 20±10mm. The length L1 of the film VII along the length direction of the reverse wrapping tube is 160±10 mm; The length L2 of the film VIII along the length direction of the reverse wrapping tube is 160±10mm; The length L3 of the film VIII along the length direction of the reverse wrapping tube is 160±10mm; The closest distance m between the end of the turn-up tube and the thread edge is 240±20mm; The overall length L of the rotary-pulled reverse-wrapped capsule is 500 mm ± 30 mm.

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