Two-section forming machine and two-section forming process for giant engineering radial tire
By adopting the "radial telescopic drum + capsule drum + finger rod + reverse packing push plate" mode in the engineering radial tire molding process, automatic forward packing and reverse packing operations are realized, solving the problem of early tire failure and improving the Service life and molding efficiency.
Patent Information
- Application Number
- CN202411634248.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-02-11
AI Technical Summary
In the existing engineering radial tire forming process, the carcass at the bottom of the steel ring is broken during the regular wrapping process, and the carcass wire is exposed. During the reverse wrapping process, the carcass is deformed obliquely or cracked locally, resulting in early failure of the tire.
The "radial telescopic drum + capsule drum + finger rod + reverse-packing push plate" mode is adopted to realize automatic forward and reverse-packing operations through a two-stage molding machine to avoid manual intervention and improve molding efficiency.
It effectively solves the problems of carcass at the bottom of the steel ring, carcass strain, oblique deformation and local cracks of the reverse carcass, and improves the service life and molding efficiency of the giant engineering radial tire.
Smart Images
Figure CN119408211A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tires, and in particular to a two-stage molding machine and a two-stage molding process for giant engineering radial tires. Background Art
[0002] Engineering radial tires are the main consumables of large-scale open-pit mining production and transportation tools. With the improvement and upgrading of manufacturing technology, my country's engineering radial tire manufacturing technology has gradually become mature, occupying part of the domestic and international market, breaking the monopoly of international tire giants. However, engineering radial tires still have quality problems such as early failure of the steel rim and the carcass turn-up during use.
[0003] At present, the building process of engineering radial tires is divided into primary and secondary methods. Among them, there are two main secondary forming processes, namely "radial telescopic drum + capsule reverse packing drum + finger-shaped piece" (hereinafter referred to as method one) and "radial telescopic drum + pull-out ring + finger-shaped rod" (hereinafter referred to as method two). According to market feedback, both of the above two forming methods have design defects: the finger-shaped piece of method one is easy to cause the tire body at the bottom of the steel ring to be folded during the positive packing process, and it is not easy to be found, or the finger-shaped piece will pull the tire body and expose the tire steel wire; the finger-shaped rod of method two is easy to cause oblique deformation of the tire body or cause partial cracking of the reversed tire body during the reverse packing process. The tire body is the most important supporting material of the tire. Folding and deformation will lead to early failure of the tire, reducing the customer experience. In addition, the existing operation method requires personnel to repeatedly intervene to deal with abnormalities, which is very inefficient. Summary of the invention
[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art, to provide a two-stage forming machine and a two-stage forming process for giant engineering radial tires, to adopt a "radial telescopic drum + capsule drum + finger rod + reverse packing push plate" mode, to solve the problems of folding of the tire body at the bottom of the steel ring during the positive packing process, tearing of the tire body to expose the tire body steel wire, oblique deformation of the tire body during the reverse packing process, and local cracking of the reverse pack tire body, to realize automatic positive packing and reverse packing operations of the two-stage forming, to improve the forming efficiency, and to effectively increase the service life of the giant engineering radial tire.
[0005] The technical solution of the present invention is: On the one hand, the present invention provides a two-stage forming machine for giant engineering radial tires, including a main case, an auxiliary case and a main shaft between the main case and the auxiliary case of a mounting seat, a radial telescopic drum is installed on the main shaft, capsule drums are arranged on both sides of the radial telescopic drum, a buckle ring device is arranged on the outer side of the capsule drum, a reverse packing push plate is arranged on the outer side of the buckle ring device, a finger rod is arranged in the reverse packing push plate and the buckle ring device, the finger rod extends out of the buckle ring device and there is a gap between the capsule drum; the capsule drum, the buckle ring device, the reverse packing push plate and the finger rod are all sleeved outside the main shaft and are driven by a pushing mechanism to move laterally.
[0006] Preferably, the pushing mechanisms of the capsule drum, the reverse push plate and the finger-shaped rod are hydraulic cylinders, and the pushing mechanism of the buckle ring device is an air cylinder.
[0007] On the other hand, the present invention provides a two-stage forming process for giant engineering radial tires, and the tire is formed in two stages by the above-mentioned two-stage forming machine for giant engineering radial tires: after the first stage tire tube is formed, it is transferred to the radial telescopic drum of the second stage forming machine, the radial telescopic drum is radially opened, and the finger-shaped rod wraps the tire body on both sides of the radial telescopic drum, and at the same time, the wire ring fitting parts placed in advance on the buckle ring device are fitted to the two sides of the radial telescopic drum; the support block of the capsule drum is propped up to lock the wire ring fitting parts, and the finger-shaped rod and the buckle ring device are returned to their original positions; compressed air is introduced into the capsule of the capsule drum to bulge the tire body wrapped by the radial telescopic drum, and the wire ring fitting parts are wrapped in the tire body. After the tire body is reversed to the set position, the reverse push plate starts to move, and the capsule of the capsule drum is pushed from the side of the radial telescopic drum to the shoulder of the radial telescopic drum, so as to realize the automatic reverse wrapping of the tire body, and the reverse push plate is returned to its original position to complete the forward wrapping and reverse wrapping operations.
[0008] Preferably, after the first stage tire tube is formed, it is transferred to the radial telescopic drum of the second stage forming machine through a transfer ring.
[0009] Preferably, the movement of the finger lever is driven by a hydraulic cylinder.
[0010] Preferably, the blocks of the capsule drum are propped up by compressed air.
[0011] Preferably, after the carcass is automatically turned up and the turning-up push plate returns to its original position, the compressed air in the capsule of the capsule drum is exhausted.
[0012] Preferably, after the front and back wrapping operations are completed, a rear pressure roller is used for rolling, and the cushion rubber and the sidewall components are sequentially attached and pressed.
[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention redesigns the structure of the two-stage forming machine and the two-stage forming process, and adopts the mode of "radial telescopic drum + capsule drum + finger rod + reverse packing push plate", which solves the problems of folding of the tire body at the bottom of the steel ring during the positive packing process, exposure of the tire body steel wire due to the stretching of the tire body, oblique deformation of the tire body during the reverse packing process, and local cracking of the reverse pack tire body, realizes automatic positive packing and reverse packing operations of the two-stage forming, improves the forming efficiency, and can effectively increase the service life of the giant engineering radial tire. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a front view of a two-stage building machine for giant engineering radial tires of the present invention.
[0015] Figure 2 It is a side view of a two-stage building machine for giant engineering radial tires of the present invention.
[0016] Figure 3 yes Figure 2 AA section view.
[0017] In the figure, 1, main case; 2, auxiliary case; 3, main shaft; 4, radial telescopic drum; 5, capsule drum; 6, buckle ring device; 7, reverse push plate; 8, finger-shaped rod. DETAILED DESCRIPTION
[0018] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.
[0019] Example 1 like Figure 1-3 As shown, this embodiment provides a two-stage forming machine for giant engineering radial tires, including a main case 1, an auxiliary case 2 and a main shaft 3 between the main case 1 and the auxiliary case 2, a radial telescopic drum 4 is installed on the main shaft 3, capsule drums 5 are arranged on both sides of the radial telescopic drum 4, a buckle ring device 6 is arranged on the outside of the capsule drum 5, a reverse push plate 7 is arranged on the outside of the buckle ring device 6, a finger-shaped rod 8 is arranged inside the reverse push plate 7 and the buckle ring device 6, and the finger-shaped rod 8 extends out of the buckle ring device 6 and is spaced from the capsule drum 5; the capsule drum 5, the buckle ring device 6, the reverse push plate 7 and the finger-shaped rod 8 are all sleeved outside the main shaft 3 and are driven by a driving mechanism to move laterally, wherein the driving mechanism of the capsule drum 5, the reverse push plate 7 and the finger-shaped rod 8 adopts a hydraulic cylinder, and the driving mechanism of the buckle ring device 6 adopts a cylinder. Among them, the radial telescopic drum 4, the capsule drum 5, the buckle ring device 6, the reverse push plate 7 and the finger-shaped rod 8 all adopt the equipment of the existing forming machine, and their specific structures are not repeated here.
[0020] The process of two-stage molding of giant engineering radial tires by the two-stage molding machine for giant engineering radial tires is as follows: after the molding of one stage tire tube is completed, it is transferred to the radial telescopic drum 4 of the two-stage molding machine through the transfer ring, the radial telescopic drum 4 is radially opened, and the finger-shaped rod 8 is driven by the hydraulic cylinder to positively wrap the tire body on both sides of the radial telescopic drum 4, and at the same time, the wire ring fitting parts placed in advance on the buckle ring device 6 are attached to both sides of the radial telescopic drum 4; the support block of the capsule drum 5 is propped up by compressed air to lock the wire ring fitting parts, and the finger-shaped rod 8 and the buckle ring device 6 are locked. Return to the original position; compressed air is introduced into the capsule of the capsule drum 5 to inflate the carcass wrapped by the radial telescopic drum 4, wrap the wire ring fitting parts in the carcass, and after reverse wrapping to the set position, the reverse push plate 7 starts to move, pushing the capsule of the capsule drum 5 from the side of the radial telescopic drum 4 to the shoulder of the radial telescopic drum 4 to achieve automatic reverse wrapping of the carcass. The reverse push plate 7 returns to the original position, and the compressed air in the capsule of the capsule drum 5 is emptied to complete the forward and reverse wrapping operations; the reversed carcass is rolled with the rear pressure roller, and the cushion rubber and sidewall components are sequentially fitted and pressed. After the second-stage molding is completed, it is transferred to the three-stage molding machine through the tire barrel transfer ring to complete the remaining steps.
[0021] Comparative Example 1 Comparative Example 1 adopts the "radial telescopic drum 4 + capsule reverse drum + finger-shaped sheet" mode, and the specific operation process is as follows: After the first stage of tire tube forming is completed, it is transferred to the radial telescopic drum 4 of the second stage forming machine through the transfer ring. The radial telescopic drum 4 opens radially, and the finger-shaped pieces are driven by the hydraulic cylinder to positively wrap the tire bodies on both sides of the radial telescopic drum 4 (quality problems such as tire body folding at the bottom of the tire bead, tire body stretching and exposure of tire body steel wire may occur during the positive wrapping process of the finger-shaped pieces). At the same time, the wire ring fitting parts placed in advance on the buckle ring device 6 are attached to both sides of the radial telescopic drum 4; the support blocks of the capsule drum 5 are propped up by compressed air to lock the wire ring fitting parts, and the finger-shaped pieces and the buckle ring device 6 are retracted. To the original position; compressed air is introduced into the capsule of the capsule drum 5 to inflate the carcass wrapped by the radial telescopic drum 4, and the wire ring laminating parts are wrapped in the carcass. Due to the deformation limitation of the capsule itself, the carcass cannot be reversed to the set position at one time, and personnel are required to assist (quality problems such as carcass deformation may occur during the manual assisted reverse wrapping process). The carcass is reversed to the set position, and the compressed air in the capsule of the capsule drum 5 is emptied to complete the forward and reverse wrapping operations; the reversed carcass is rolled with the rear pressure roller, and the cushion rubber and sidewall components are respectively laminated and rolled in sequence. After the second stage of molding is completed, it is transferred to the third stage molding machine through the tire barrel transfer ring to complete the remaining steps.
[0022] Comparative Example 2 Comparative Example 2 adopts the "radial telescopic drum 4+pull-out ring+finger-shaped rod 8" mode, and the specific operation process is as follows: After the first stage of tire tube forming is completed, it is transferred to the radial telescopic drum 4 of the second stage forming machine through the transfer ring. The radial telescopic drum 4 is radially opened, and the finger-shaped rod 8 is driven by the pneumatic motor to positively wrap the tire bodies on both sides of the radial telescopic drum 4, and at the same time, the wire ring fitting parts placed in advance on the buckle ring device 6 are attached to the two sides of the radial telescopic drum 4; the support block of the pull-out ring is propped up by compressed air to lock the wire ring fitting parts, and the finger-shaped rod 8 and the buckle ring device 6 return to their original positions; the finger-shaped rod 8 is driven by the pneumatic motor to positively wrap the radial telescopic drum 4 The carcass is lifted up, the wire ring fitting is wrapped in the carcass, and after it is reversed to the drum shoulder position of the radial telescopic drum 4, multiple operators manually reverse it to the set position for the second time (the finger-shaped rod lifting process will damage the carcass, causing local cracking of the carcass / exposing the carcass steel wire; the manual assisted reverse wrapping process will cause carcass deformation and other quality problems), and the pneumatic motor drives the finger-shaped rod 8 back to the original position to complete the positive and reverse wrapping operations; the reversed carcass is rolled with the rear pressure roller, and the cushion rubber and sidewall components are sequentially bonded and rolled. After the second stage of molding is completed, it is transferred to the three-stage molding machine through the tire barrel transfer ring to complete the remaining steps.
[0023] The tires of Example 1 and Comparative Examples 1-2 were subjected to performance tests, and the test results are shown in Table 1: Table 1 Tire performance test results of Example 1 and Comparative Examples 1-2
[0024] As can be seen from Table 2, compared with the existing molding process of Comparative Examples 1-2, the molding process of the present invention shows that the bending angle of the turned-up carcass is significantly reduced in the finished product X-ray image. Through finite element simulation, the greater the deformation of the turned-up carcass, the more likely the tire bead failure will occur. In the model of the turned-up carcass bending, the smaller the angle between the turned-up carcass and the main carcass, the more effectively the radial-axial strain of the tire bead rubber interface unit can be reduced, and the corresponding tire durability time will be longer.
Claims
1. A two-stage building machine for giant engineering radial tires, characterized in that: The invention comprises a main case (1), an auxiliary case (2) and a main shaft (3) between the main case (1) and the auxiliary case (2), a radial telescopic drum (4) being mounted on the main shaft (3), capsule drums (5) being arranged on both sides of the radial telescopic drum (4), a buckle ring device (6) being arranged on the outer side of the capsule drum (5), a reverse push plate (7) being arranged on the outer side of the buckle ring device (6), a finger-shaped rod (8) being arranged inside the reverse push plate (7) and the buckle ring device (6), the finger-shaped rod (8) extending out of the buckle ring device (6) and having a gap with the capsule drum (5); the capsule drum (5), the buckle ring device (6), the reverse push plate (7) and the finger-shaped rod (8) are all sleeved outside the main shaft (3) and are respectively driven by a driving mechanism to move laterally.
2. The two-stage building machine for giant engineering radial tires according to claim 1, characterized in that: The pushing mechanisms of the capsule drum (5), the reverse packing push plate (7) and the finger-shaped rod (8) adopt hydraulic cylinders, and the pushing mechanism of the buckle ring device (6) adopts a pneumatic cylinder.
3. A two-stage forming process for giant engineering radial tires, characterized in that: The tire is molded in two stages by the two-stage molding machine for giant engineering radial tires as claimed in claim 1 or 2: after the first stage tire tube is molded, it is transferred to the radial telescopic drum (4) of the second stage molding machine, the radial telescopic drum (4) is radially opened, the finger-shaped rod (8) wraps the tire body on both sides of the radial telescopic drum (4), and at the same time, the wire ring fitting parts placed in advance on the buckle ring device (6) are attached to both sides of the radial telescopic drum (4); the support block of the capsule drum (5) is propped up to attach the wire ring The parts are locked, and the finger-shaped rod (8) and the buckle ring device (6) are returned to their original positions; compressed air is introduced into the capsule of the capsule drum (5), so that the carcass of the radial telescopic drum (4) is inflated, and the wire ring fitting is wrapped in the carcass. After the carcass is reversed to a set position, the reverse push plate (7) starts to move, and the capsule of the capsule drum (5) is pushed from the side of the radial telescopic drum (4) to the shoulder of the radial telescopic drum (4), so that the carcass is automatically reversed, and the reverse push plate (7) is returned to its original position, completing the reverse and reverse operations.
4. The two-stage forming process for a giant engineering radial tire as claimed in claim 3, characterized in that: After the first stage tire tube is formed, it is transferred to the radial telescopic drum (4) of the second stage forming machine through a transfer ring.
5. The two-stage forming process for giant engineering radial tire according to claim 3, characterized in that: The movement of the finger-shaped rod (8) is driven by a hydraulic cylinder.
6. The two-stage forming process for a giant engineering radial tire as claimed in claim 3, characterized in that: The support blocks of the capsule drum (5) are propped up by compressed air.
7. The two-stage forming process for a giant engineering radial tire as claimed in claim 3, characterized in that: After the carcass is automatically reversed and the reverse push plate (7) returns to its original position, the compressed air in the capsule of the capsule drum (5) is exhausted.
8. The two-stage forming process for a giant engineering radial tire as claimed in claim 3, characterized in that: After completing the positive and negative wrapping operations, the rear pressure roller is used for rolling, and the cushion rubber and sidewall components are sequentially bonded and pressed.