Mould clamping force detection and control system of vulcanizing machine

Abstract

The utility model discloses a mold closing force detection and control system of a vulcanizing machine, which belongs to the technical field of vulcanizing machines and comprises a mold closing oil cylinder, a rod cavity of the mold closing oil cylinder is connected with a low-pressure oil way, and a rodless cavity of the mold closing oil cylinder is connected with a high-pressure oil way; a first pressure sensor is connected to the high-pressure oil way close to a rodless cavity of the mold closing oil cylinder, and a second pressure sensor is connected to a valve block of the vulcanizing machine hydraulic station; the device further comprises a control module, and the first pressure sensor and the second pressure sensor are both connected with the control module. The pressure sensors are arranged on the hydraulic oil cylinder and the valve block, the hydraulic oil cylinder and the valve block can collect the mold clamping force and compare the mold clamping force with each other, and if one pressure sensor is detected to break down, one vulcanization cycle can be completed by using the other pressure sensor in an emergency mode, so that normal vulcanization of a tire is ensured, and the production efficiency is improved. And defective tires and even waste tires are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vulcanizing machines, in particular to a mold clamping force detection and control system for a vulcanizing machine. Background Art

[0002] At present, the control of clamping force is particularly important during tire vulcanization. The clamping force is mainly collected by the clamping force collection pressure sensor of the oil cylinder and fed back to the PLC. The PLC controls the oil pump to release and replenish pressure to ensure that the clamping force of a vulcanization cycle is stable within a range. If the clamping force collection pressure sensor of the oil cylinder is damaged, the clamping force will be inaccurate or even unable to be detected, which will cause the vulcanized tire to produce a large number of rubber edges or even waste tires due to insufficient clamping force, or the oil temperature of the hydraulic station will continue to rise, causing damage to the hydraulic station.

[0003] In view of the above problems existing in the prior art, the utility model designs and manufactures a vulcanizing machine clamping force detection and control system to overcome the above defects. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a vulcanizer clamping force detection and control system, which arranges pressure sensors on both the hydraulic cylinder and the valve block, and both can collect the clamping force and compare them with each other. If a failure is detected in the pressure sensor of one side, it can be switched to use only the other pressure sensor to complete a vulcanization cycle, so as to ensure the normal vulcanization of the tire and avoid the production of defective tires or even waste tires.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a vulcanizing machine mold clamping force detection and control system, comprising a mold clamping cylinder, wherein the rod chamber of the mold clamping cylinder is connected to a low-pressure oil circuit, and the rodless chamber of the mold clamping cylinder is connected to a high-pressure oil circuit;

[0006] A first pressure sensor is connected to the high-pressure oil circuit close to the rodless chamber of the mold clamping cylinder, and a second pressure sensor is connected to the valve block of the hydraulic station of the vulcanizer;

[0007] It also includes a control module, and the first pressure sensor and the second pressure sensor are both connected to the control module.

[0008] Preferably, it further comprises a solenoid valve, and the low-pressure oil circuit and the high-pressure oil circuit are both connected to the solenoid valve;

[0009] The solenoid valve is configured as a three-position four-way solenoid reversing valve.

[0010] Preferably, a first one-way throttle valve is provided on the low-pressure oil circuit between the solenoid valve and the rod chamber.

[0011] Preferably, a second one-way throttle valve is provided on the high-pressure oil circuit between the solenoid valve and the rodless chamber.

[0012] Preferably, a hydraulically controlled one-way valve is provided on the high-pressure oil circuit between the second one-way throttle valve and the rodless chamber, and the control oil circuit of the hydraulically controlled one-way valve is connected to the low-pressure oil circuit.

[0013] Preferably, a first oil pump and a first one-way valve are sequentially provided on the low-pressure oil circuit at the other end of the solenoid valve along the conveying direction;

[0014] The end of the high-pressure oil circuit at the other end of the solenoid valve is connected with an oil tank.

[0015] Preferably, the first pressure sensor is connected to the high-pressure oil circuit between the hydraulically controlled one-way valve and the rodless chamber.

[0016] Preferably, it further comprises a boost oil circuit, one end of which is connected to a second oil pump, and the other end of which is connected to a high-pressure oil circuit between the hydraulically controlled one-way valve and the rodless chamber;

[0017] The boost oil circuit is provided with a second one-way valve and a throttle valve in sequence along the conveying direction.

[0018] Preferably, it also includes a pressure-maintaining oil circuit, one end of which is connected to the accumulator, a third one-way throttle valve is provided on the pressure-maintaining oil circuit close to the accumulator, and the other end of the pressure-maintaining oil circuit is connected to the high-pressure oil circuit between the hydraulic one-way valve and the rodless chamber;

[0019] The pressure-maintaining oil circuit is also connected to an oil tank, and an overflow valve is provided on the pressure-maintaining oil circuit connected to the oil tank.

[0020] The utility model is beneficial in that:

[0021] The utility model uses a control module to collect and compare data from a first pressure sensor and a second pressure sensor connected in series for the clamping force of the oil cylinder. When the difference between the two sensors exceeds an alarm range, the control module determines the faulty pressure sensor and switches to a mode that uses another pressure sensor as a clamping force judgment reference, thereby avoiding quality problems such as insufficient or excessive clamping force caused by failure of a single pressure sensor during the vulcanization process, effectively avoiding the generation of defective products, and this solution has strong versatility and can be applied to control systems of vulcanizers of various models. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a clamping force detection and control system for a vulcanizing machine;

[0023] Figure 2 A schematic diagram of a vulcanizing machine.

[0024] In the figure: 1-first oil pump, 2-low-pressure oil circuit, 3-first one-way valve, 4-solenoid valve, 5-first one-way throttle valve, 6-mold clamping cylinder, 7-oil tank, 8-high-pressure oil circuit, 9-second one-way throttle valve, 10-hydraulic one-way valve, 11-boosting oil circuit, 12-throttle valve, 13-second one-way valve, 14-second oil pump, 15-pressure maintaining oil circuit, 16-first pressure sensor, 17-second pressure sensor, 18-control module, 19-accumulator, 20-third one-way throttle valve, 21-overflow valve. DETAILED DESCRIPTION

[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2 As shown, a clamping force detection and control system for a vulcanizer includes a clamping cylinder 6, the number of which is set according to the model of the vulcanizer, the rod chamber of the clamping cylinder 6 is connected to the low-pressure oil circuit 2, and the rodless chamber of the clamping cylinder 6 is connected to the high-pressure oil circuit 8. During the tire vulcanization process, the clamping force is controlled by default using the pressure signal of the pressure sensor collected when the clamping cylinder 6 is clamped, including pressurization and pressure relief, that is, a first pressure sensor 16 is connected to the high-pressure oil circuit 8 close to the rodless chamber of the clamping cylinder 6. If the first pressure sensor 16 is damaged, the clamping force detected will be inaccurate or even unable to be detected, which will cause the vulcanized tire to produce a large number of rubber edges or even waste tires due to insufficient clamping force, or the oil temperature of the hydraulic station will continue to rise, causing damage to the hydraulic station. Therefore, the utility model is connected to a second pressure sensor 17 on the valve block of the hydraulic station of the vulcanizer, and also includes a control module 18, and the first pressure sensor 16 and the second pressure sensor 17 are both connected to the control module 18.

[0027] The utility model uses a control module 18 to collect and compare the data of the first pressure sensor 16 and the second pressure sensor 17 connected in series for the clamping force of the oil cylinder. When the difference between the two sensors exceeds the alarm range, the control module 18 will determine the faulty pressure sensor and switch to a mode that uses the other pressure sensor as a clamping force judgment reference, thereby avoiding the quality problem of insufficient or excessive clamping force caused by the failure of a single pressure sensor during the vulcanization process, effectively avoiding the production of defective products, and this solution has strong versatility and can be applied to the control systems of various types of vulcanizers.

[0028] It also includes a solenoid valve 4, the low-pressure oil circuit 2 and the high-pressure oil circuit 8 are both connected to the solenoid valve 4, the solenoid valve 4 is set as a three-position four-way solenoid reversing valve, the low-pressure oil circuit 2 between the solenoid valve 4 and the rod chamber is provided with a first one-way throttle valve 5, and the high-pressure oil circuit 8 between the solenoid valve 4 and the rodless chamber is provided with a second one-way throttle valve 9. The extension and retraction speed of the clamping oil cylinder 6 can be adjusted by the first one-way throttle valve 5 and the second one-way throttle valve 9.

[0029] A hydraulically controlled one-way valve 10 is provided on the high-pressure oil circuit 8 between the second one-way throttle valve 9 and the rodless chamber. The control oil circuit of the hydraulically controlled one-way valve 10 is connected to the low-pressure oil circuit 2. The utility model can realize the rodless chamber pressure maintaining function through the hydraulically controlled one-way valve 10. The first pressure sensor 16 is specifically connected to the high-pressure oil circuit 8 between the hydraulically controlled one-way valve 10 and the rodless chamber.

[0030] The low-pressure oil circuit 2 at the other end of the solenoid valve 4 of the utility model is provided with a first oil pump 1 and a first non-return valve 3 in sequence along the conveying direction, and the end of the high-pressure oil circuit 8 at the other end of the solenoid valve 4 is connected to an oil tank 7.

[0031] It also includes a boost oil circuit 11, one end of which is connected to a second oil pump 14, and the other end of the boost oil circuit 11 is connected to the high-pressure oil circuit 8 between the hydraulically controlled one-way valve 10 and the rodless chamber, thereby realizing the pressurization function and improving the mold clamping force. The boost oil circuit 11 is provided with a second one-way valve 13 and a throttle valve 12 in sequence along the conveying direction. The throttle valve 12 is provided to achieve the purpose of adjusting the boost speed.

[0032] The utility model also includes a pressure-maintaining oil circuit 15, one end of which is connected to an accumulator 19, thereby improving the pressure-maintaining performance of the system. A third one-way throttle valve 20 is provided on the pressure-maintaining oil circuit 15 near the accumulator 19, which can adjust the speed of releasing the pressure oil. The other end of the pressure-maintaining oil circuit 15 is connected to the high-pressure oil circuit 8 between the hydraulically controlled one-way valve 10 and the rodless chamber. The pressure-maintaining oil circuit 15 is also connected to an oil tank 7. An overflow valve 21 is provided on the pressure-maintaining oil circuit 15 connected to the oil tank 7, which can limit the maximum clamping force range that the system can provide.

[0033] The specific working steps of this utility model are as follows:

[0034] The control module 18 pre-sets the mold clamping force value and the maximum value of the difference between the first pressure sensor 16 and the second pressure sensor 17;

[0035] The first pressure sensor 16 and the second pressure sensor 17 are connected in series, and the two respectively collect data and transmit them to the control module 18;

[0036] The values ​​collected by the first pressure sensor 16 and the second pressure sensor 17 are converted into the mold clamping force, which are compared with the preset mold clamping force values. During the vulcanization process, when the value collected by the pressure sensor is greater than the preset mold clamping force value, the control module 18 will control the mold clamping cylinder 6 to reduce the pressure and reduce the mold clamping force; when the value collected by the pressure sensor is less than the preset mold clamping force value, the control module 18 will control the mold clamping cylinder 6 to increase the pressure and increase the mold clamping force. In this process, when the required mold clamping force state is reached, the two data are the same;

[0037] During the pressurization / depressurization process of the mold clamping cylinder 6, after the pressurization / depressurization setting time is exceeded, the value of the mold clamping force is compared with the set mold clamping force value. If one of the pressure sensors fails, the comparison result can be used to determine which pressure sensor is abnormal. If both fail, an alarm will be issued to indicate that the pressure sensors are abnormal and need to be handled manually.

[0038] At the same time, the values ​​collected by the first pressure sensor 16 and the second pressure sensor 17 are compared with each other. When the difference between the two pressure sensors exceeds the maximum value of the set difference, the control module 18 prompts that the pressure sensor is faulty;

[0039] If one of the pressure sensors fails, the control module 18 switches to a mode in which the value collected by the other pressure sensor is used as a reference for determining the mold clamping force, thereby ensuring that a vulcanization cycle is completed without producing defective tires or even waste tires.

[0040] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A vulcanizing machine clamping force detection and control system, characterized in that: It comprises a mold clamping oil cylinder (6), wherein the rod chamber of the mold clamping oil cylinder (6) is connected to the low-pressure oil circuit (2), and the rodless chamber of the mold clamping oil cylinder (6) is connected to the high-pressure oil circuit (8); The high-pressure oil circuit (8) close to the rodless chamber of the mold clamping cylinder (6) is connected to a first pressure sensor (16), and the valve block of the vulcanizer hydraulic station is connected to a second pressure sensor (17); It also includes a control module (18), and the first pressure sensor (16) and the second pressure sensor (17) are both connected to the control module (18).

2. A vulcanizing machine clamping force detection and control system according to claim 1, characterized in that: It also includes a solenoid valve (4), and the low-pressure oil circuit (2) and the high-pressure oil circuit (8) are both in communication with the solenoid valve (4); The solenoid valve (4) is configured as a three-position four-way solenoid reversing valve.

3. A vulcanizing machine clamping force detection and control system according to claim 2, characterized in that: A first one-way throttle valve (5) is provided on the low-pressure oil circuit (2) between the solenoid valve (4) and the rod chamber.

4. A vulcanizing machine clamping force detection and control system according to claim 2, characterized in that: A second one-way throttle valve (9) is provided on the high-pressure oil circuit (8) between the solenoid valve (4) and the rodless chamber.

5. A vulcanizing machine clamping force detection and control system according to claim 4, characterized in that: A hydraulically controlled one-way valve (10) is provided on the high-pressure oil circuit (8) between the second one-way throttle valve (9) and the rodless chamber, and the control oil circuit of the hydraulically controlled one-way valve (10) is connected to the low-pressure oil circuit (2).

6. A vulcanizing machine clamping force detection and control system according to claim 2, characterized in that: A first oil pump (1) and a first check valve (3) are provided in sequence on the low-pressure oil circuit (2) at the other end of the solenoid valve (4) along the conveying direction; The end of the high-pressure oil circuit (8) at the other end of the solenoid valve (4) is connected to an oil tank (7).

7. A vulcanizing machine clamping force detection and control system according to claim 5, characterized in that: The first pressure sensor (16) is connected to the high-pressure oil circuit (8) between the hydraulically controlled one-way valve (10) and the rodless chamber.

8. A vulcanizing machine clamping force detection and control system according to claim 5, characterized in that: It also includes a boosting oil circuit (11), one end of the boosting oil circuit (11) is connected to a second oil pump (14), and the other end of the boosting oil circuit (11) is connected to a high-pressure oil circuit (8) between the hydraulically controlled one-way valve (10) and the rodless chamber; The boost oil circuit (11) is provided with a second one-way valve (13) and a throttle valve (12) in sequence along the conveying direction.

9. A vulcanizing machine clamping force detection and control system according to claim 5, characterized in that: It also includes a pressure-maintaining oil circuit (15), one end of the pressure-maintaining oil circuit (15) is connected to an accumulator (19), a third one-way throttle valve (20) is provided on the pressure-maintaining oil circuit (15) near the accumulator (19), and the other end of the pressure-maintaining oil circuit (15) is connected to a high-pressure oil circuit (8) between the hydraulic one-way valve (10) and the rodless chamber; The pressure-maintaining oil circuit (15) is also connected to an oil tank (7), and a relief valve (21) is provided on the pressure-maintaining oil circuit (15) connected to the oil tank (7).

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