A capsule shaping structure capable of improving tire pocket air

Abstract

This invention provides a bladder-shaped structure for improving tire air pockets, comprising a bladder, wherein the air inlet of the bladder is connected to a medium source via an air inlet pipe, a filter valve is installed on the air inlet pipe, and a balance valve is also installed on the air inlet and filter valve of the air inlet pipe. The exhaust port of the bladder is connected to a vacuum assembly via an exhaust pipe. The bladder-shaped structure provided by this invention adds a vacuum assembly and a pressure reducing valve to existing bladder-shaped equipment, making modification difficult and cost-effective. The parameters of the bladder-shaped method (pressure range, vacuum time) can be flexibly adjusted according to the tire blank specifications to adapt to the production needs of different tire models. Furthermore, by optimizing the bladder-shaped process and device structure, it achieves full gas discharge, improves the fit between the bladder and the tire blank, and ensures uniform pressure distribution, thereby improving tire production quality and performance stability.

Description

Technical Field

[0001] This utility model relates to the field of tire processing equipment technology, and in particular to a capsule shaping structure that can improve tire air pockets. Background Technology

[0002] In the vulcanization process of tire manufacturing, bladder shaping is a key pretreatment step. Its core purpose is to inflate the bladder by filling it with a medium (nitrogen or steam), which causes the tire carcass to stretch and fit tightly against the bladder, providing a stable tire carcass shape for subsequent vulcanization molding.

[0003] In existing technologies, the bladder shaping process involves only a single expansion and shaping operation: a corresponding pressure is set according to the tire carcass of different specifications, and the bladder is inflated with a medium to fully conform to the tire carcass in one go. After shaping, it directly enters the vulcanization process. However, this traditional shaping method has significant technical defects: during the single expansion process, a closed space is easily formed when the bladder comes into contact with the tire carcass, preventing the air between them from escaping in time (i.e., the "air pocket" phenomenon). Air pockets can cause quality problems such as air bubbles, uneven structural density, and reduced sealing performance inside the tire after vulcanization, seriously affecting the tire's mechanical properties and service life, becoming a key technical challenge restricting the improvement of tire production quality.

[0004] In the vulcanization process, the problem of air pockets is generally improved by adjusting various parameters of the vulcanizing machine (such as bladder shaping pressure, bladder shaping height, and tire loading height) or by replacing the bladder (such as adjusting the bladder structure or replacing it with a larger bladder). Although these two methods can alleviate the situation to some extent, they still have limitations.

[0005] Parameter adjustments are constrained by equipment performance and process window; excessive adjustment can easily lead to new problems such as misalignment and tire cracks. Capsule replacement is costly and difficult to adapt to complex working conditions. It cannot be guaranteed that the replacement capsule can improve the air pocket problem without causing other problems. Moreover, after long-term use, the replaced capsule may still cause air pocket recurrence due to aging and deformation. Currently, most capsules used are purchased from external manufacturers. Contacting manufacturers to adjust the structure is a complicated process and cannot cope with unexpected problems.

[0006] Therefore, developing a capsule shaping technology that can effectively remove gas trapped between the embryo and the capsule and optimize the shaping effect is a pressing technical need in this field. In view of this, this utility model is proposed. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of the aforementioned technologies by providing a capsule shaping structure that can improve tire air pockets. By optimizing the shaping process and device structure, it achieves full gas discharge, improves the fit between the capsule and the tire blank, and evens the pressure distribution, thereby improving tire production quality and performance stability.

[0008] Therefore, this utility model provides a capsule shaping structure that can improve tire air pockets, including a shaping capsule, wherein the air inlet of the shaping capsule is connected to a medium source through an air inlet pipe, a filter valve is provided on the air inlet pipe, and a balance valve is also provided on the air inlet pipe and the filter valve.

[0009] The exhaust port of the shaping capsule is connected to the vacuum assembly via an exhaust pipe.

[0010] Preferably, the vacuum assembly includes a vacuum valve and a first solenoid valve, and the first solenoid valve is electrically connected to the vacuum valve for controlling the opening and closing of the vacuum valve.

[0011] Preferably, the balancing valve is electrically connected to the second solenoid valve, which is used to control the on / off state of the balancing valve.

[0012] Preferably, the input end of the balancing valve is connected to the pressure reducing valve via a second solenoid valve.

[0013] Preferably, the capsule shaping structure further includes a tire loading robot for fixing the tire blank throughout the shaping process.

[0014] Preferably, the medium source provides nitrogen and / or vapor.

[0015] Preferably, the capsule shaping structure includes a pressure sensor for detecting the pressure inside the shaping capsule, and a control unit;

[0016] The control unit is used to receive the detection signal from the pressure sensor and control the opening and closing of each solenoid valve and the pressure adjustment of each pressure reducing valve according to a preset program.

[0017] This invention provides a capsule-shaped structure that can improve tire deflation, and has the following beneficial effects:

[0018] (1) The capsule shaping structure provided by this utility model adds a vacuum component and a pressure reducing valve to the existing shaping equipment. The modification is easy and the cost is controllable. The parameters of the shaping method (pressure range, vacuum time) can be flexibly adjusted according to the tire blank specifications to meet the production needs of different tire models.

[0019] (2) The capsule shaping structure provided by this utility model adopts a three-stage shaping process of "first expansion - vacuuming - second expansion". A vacuuming and shrinking step is added between the two expansions, which can actively discharge the gas trapped between the capsule and the tire blank, avoid the air trapping phenomenon caused by traditional single expansion, and eliminate the quality hazards such as air bubbles and uneven structure after tire vulcanization from the root. The full discharge of gas improves the fit between the capsule and the tire blank, and the pressure distribution is uniform, thereby improving the tire production quality and performance stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the capsule-shaped structure of this utility model that can improve tire air pockets;

[0021] Marked in the image:

[0022] 10. Balancing valve; 11. Vacuum valve; 20. First solenoid valve; 21. Second solenoid valve; 30. Filter valve; 40. Pressure reducing valve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] This embodiment discloses a capsule-shaped structure that can improve tire deflation, the specific structure of which is as follows: Figure 1 As shown, it specifically includes:

[0028] Shaping capsule: Made of rubber with good elasticity and high temperature resistance, it is suitable for the working environment of tire vulcanization process. Its size is customized according to the specifications of the tire blank to be processed and is fitted inside the tire blank.

[0029] Medium source: Used to provide nitrogen and / or steam. Single or mixed media can be selected according to production needs to ensure the expansion power during the shaping process;

[0030] Intake and exhaust pipes: Made of tubing with good pressure resistance and sealing performance, the intake pipe is used for media transmission and the exhaust pipe is used for gas discharge;

[0031] Filter valve 30: Installed at the end of the air inlet pipe near the medium source, it is used to filter moisture, dust and other impurities in the medium to ensure the cleanliness of the medium;

[0032] Balance valve 10: Installed on the side of the air inlet pipe near the air inlet of the shaping capsule, used to control the on / off of medium filling;

[0033] The second solenoid valve 21 is electrically connected to the balance valve 10 and receives instructions from the control unit to control the opening and closing of the balance valve 10, ensuring the timeliness of the on / off control.

[0034] Pressure reducing valve 40: Used to regulate the pressure of the medium entering the balance valve 10 to meet the pressure requirements of different shaping stages. The input end of the balance valve 10 is connected to the pressure reducing valve 40 through the second solenoid valve 21.

[0035] Vacuum assembly: includes a vacuum valve 11, a first solenoid valve 20, and an external vacuum device; the first solenoid valve 20 is electrically connected to the vacuum valve 11 and controls its opening and closing; the external vacuum device is used to provide vacuum power to ensure rapid gas discharge.

[0036] Tire loading robot: It adopts a multi-claw gripping structure, and the gripping parts are equipped with anti-slip protective components to avoid damage to the tire blank; throughout the shaping process, the tire loading robot grips the tire blank evenly from the outside to fix the tire blank position and prevent displacement;

[0037] Pressure sensor: Installed inside the air inlet of the shaping capsule or inside the capsule, it detects the internal pressure of the capsule in real time and provides a pressure feedback signal to the control unit;

[0038] Control unit: It is connected to the pressure sensor, the first solenoid valve 20, the second solenoid valve 21, and the pressure reducing valve 40 via signal lines. It has a built-in preset control program, which can receive the detection signal from the pressure sensor and output commands to control the action of each component. According to the preset program, it controls the opening and closing of each solenoid valve and the pressure regulation of the pressure reducing valve 40 to achieve automatic control.

[0039] The working process of the capsule shaping structure provided in this embodiment is as follows:

[0040] Step 1: Equipment debugging and embryo fixation

[0041] The tire blank to be shaped is placed on the outside of the shaping capsule. The tire loading robot is started to clamp and fix the tire blank evenly from the outside, ensuring that the tire blank is not skewed. The parameters are set through the control unit: the first shaping pressure is 70%-90% of the normal shaping pressure, the second shaping pressure is the normal shaping pressure, and the vacuuming time is set reasonably according to the vacuuming rate of the machine.

[0042] Step 2: One-time shaping and expansion

[0043] The control unit outputs a command to control the second solenoid valve 21 to open and the balance valve 10 to open; at the same time, it controls the pressure reducing valve 40 to adjust the medium pressure to the set primary shaping pressure; the medium provided by the medium source 80 is filtered by the filter valve 30 and then filled into the shaping capsule through the air inlet pipe.

[0044] The shaping capsule gradually expands under the action of the medium, comes into contact with the tire blank and generates pressure; the pressure sensor detects the internal pressure of the capsule in real time, and when the detected value reaches the set primary shaping pressure, the pressure sensor feeds back the signal to the control unit; after receiving the signal, the control unit outputs a command to control the second solenoid valve 21 to open and the balance valve 10 to close, stopping the inflation;

[0045] During this process, the first solenoid valve 20 remains in the off state, and the vacuum valve 11 is closed; the expansion of the shaping capsule causes the shoulder of the embryo to gradually change from an inward concave state to an outward convex state, and the capsule and the embryo initially fit together, while the extensibility of the capsule and the flexibility of the embryo are improved simultaneously.

[0046] Step 3: Vacuum shrinkage

[0047] After step 2 is completed, the control unit outputs a command after a preset delay to control the first solenoid valve 20 to open and the vacuum valve 11 to open; the external vacuum device is started, and the vacuum is drawn into the shape capsule through the exhaust pipe and the vacuum valve 11.

[0048] As gas continues to be expelled from the capsule, the capsule gradually contracts and detaches from the embryo, and the gas trapped between the capsule and the embryo is completely extracted. When the vacuuming time reaches the set value, the control unit receives the time signal and outputs a command to control the first solenoid valve 20 to open and the vacuuming valve 11 to close, thus ending the vacuuming process.

[0049] During this process, the position of the fetal shoulder changes from an outward convex state to an inward concave state, eliminating the risk of air pockets.

[0050] Step 4: Secondary shaping and expansion

[0051] After step 3 above is completed, the control unit immediately outputs a command to control the second solenoid valve 21 to open again and the balance valve 10 to open; at the same time, it controls the pressure reducing valve 40 to adjust the medium pressure to the set normal shaping pressure; the medium continues to fill the shaping capsule through the air inlet pipe;

[0052] The shaping capsule expands again after detaching from the contracted state, re-contacts the embryo and generates pressure; the pressure sensor detects the pressure in real time, and when the detected value reaches the set normal shaping pressure, it feeds the signal back to the control unit; the control unit outputs a command to control the second solenoid valve 21 to open and the balance valve 10 to close, stopping inflation and completing the shaping process;

[0053] Subsequently, the tire loading robot retracts and loosens, exiting the tire blank area, and the vulcanizing machine closes the mold, entering the tire vulcanization process.

[0054] Using the structure and method of this embodiment for tire shaping can control air pressure, optimize tire structure, improve sealing performance, uniformly distribute internal pressure, significantly reduce the risk of air pockets, avoid air pockets during the first shaping, and allow the air pockets from the first shaping to be fully expelled during the second shaping, thereby improving the quality of tire production and providing a solid guarantee for the stable and reliable performance of tires.

[0055] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A capsule-shaped structure for improving tire deflation, comprising a shaping capsule, characterized in that: The air inlet of the shaping capsule is connected to the medium source through an air inlet pipe. A filter valve (30) is provided on the air inlet pipe. A balance valve (10) is also provided on the air inlet pipe at the air inlet and the filter valve (30). The exhaust port of the shaping capsule is connected to the vacuum assembly via an exhaust pipe.

2. The capsule shaping structure for improving tire pocket air according to claim 1, wherein: The vacuum assembly includes a vacuum valve (11) and a first solenoid valve (20), and the first solenoid valve (20) is electrically connected to the vacuum valve (11) to control the opening and closing of the vacuum valve (11).

3. The capsule shaping structure for improving tire pocket air according to claim 1, wherein: The balancing valve (10) is electrically connected to the second solenoid valve (21), which is used to control the opening and closing of the balancing valve (10).

4. The capsule shaping structure for improving tire pocket air according to claim 3, wherein: The input end of the balancing valve (10) is connected to the pressure reducing valve (40) via the second solenoid valve (21).

5. The capsule shaping structure for improving tire pocket air according to claim 1, wherein: The capsule shaping structure also includes a tire loading robot for fixing the tire blank throughout the shaping process.

6. The capsule shaping structure for improving tire pocket air according to claim 1, wherein: The medium source provides nitrogen and / or vapor.

7. A capsule-shaped structure for improving tire deflation according to any one of claims 1-6, characterized in that: The capsule shaping structure includes a pressure sensor for detecting the pressure inside the shaping capsule, and a control unit; The control unit is used to receive the detection signal from the pressure sensor and control the on / off state of each solenoid valve and the pressure regulation of the pressure reducing valve (40) according to a preset program.

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