Vulcanization process for steel cord conveyor belt joints

Abstract

The present invention relates to the technical field of steel cord conveyor belts, and in particular to a vulcanization process for steel cord conveyor belt joints, wherein the vulcanization process includes the following steps in sequence: a first pressurization and temperature increase step, a first constant temperature and pressure step, an exhaust step, a second pressurization and temperature increase step, a second constant temperature and pressure step, and a natural cooling step. By providing an exhaust step, the exhaust step discharges the water vapor generated in the steel cord conveyor belt joint, ensuring that no bubbles are generated in the steel cord conveyor belt joint, improving the vulcanization quality of the steel cord conveyor belt joint, and improving the service life of the steel cord conveyor belt; at the same time, the present invention undergoes two pressurization and temperature increase steps and a constant temperature and pressure step, and the pressure and temperature gradually increase and rise, further improving the vulcanization quality of the steel cord conveyor belt joint, and significantly improving the service life of the steel cord conveyor belt.

Description

Technical Field

[0001] The invention relates to the technical field of steel cord conveyor belts, and in particular to a vulcanization process for a joint of a steel cord conveyor belt. Background Art

[0002] When using steel cord conveyor belts to transport materials over long distances, multiple steel cord conveyor belts need to be connected together through joints. In order to ensure the quality of the steel cord conveyor belt joints, vulcanization of the steel cord conveyor belt joints is a necessary process. At present, the vulcanization process of the steel cord conveyor belt joints includes a pressurization and heating process, a constant temperature and pressure process, and a natural cooling process. During the pressurization and heating process, a certain amount of water vapor may be generated in the steel cord conveyor belt joint, and then bubbles will be generated, resulting in gaps in the joint. Long-term use can easily cause bulging and cracking of the conveyor belt joints, reducing the service life of the conveyor belt. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a vulcanization process for a steel cord conveyor belt joint with a longer service life.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a vulcanization process for a steel cord conveyor belt joint, the vulcanization process sequentially comprising the following steps: a first pressurization and temperature increase step, a first constant temperature and pressure step, an exhaust step, a second pressurization and temperature increase step, a second constant temperature and pressure step, and a natural cooling step.

[0005] Furthermore, in the first pressurization and temperature raising step, the pressure is raised to 1 to 1.2 MPa and the temperature is raised to 100°C while the pressure is raised.

[0006] Furthermore, in the first pressurization and temperature raising step, the process of raising the temperature to 100°C is as follows: the temperature is raised to 95°C by heating, and after the heating is stopped, the temperature continues to rise to 100°C under the effect of residual heat.

[0007] Furthermore, in the first constant temperature and constant pressure process, the constant pressure is 1.2 MPa, the constant temperature is 100° C., and the time is 10 min.

[0008] Furthermore, during the exhaust process, the temperature was maintained at 100° C. and the pressure was gradually reduced from 1.2 MPa to 0 MPa.

[0009] Furthermore, in the second pressurization and temperature raising step, the pressure is raised to 1.7-1.8 MPa and the temperature is raised to 145°C±5°C.

[0010] Furthermore, in the second constant temperature and constant pressure process, the constant pressure is 1.7-1.8 MPa, the constant temperature is 145°C±5°C, and the time is 45 minutes.

[0011] The beneficial effects of the present invention are as follows: the present invention is used for the vulcanization process of the joint of the steel cord conveyor belt, and the vulcanization process includes the following processes in sequence: the first pressurization and temperature rising process, the first constant temperature and pressure process, the exhaust process, the second pressurization and temperature rising process, the second constant temperature and pressure process and the natural cooling process, and the above processes are all performed on the joint of the steel cord conveyor belt in the vulcanization equipment. By providing the exhaust process, the exhaust process discharges the water vapor generated in the joint of the steel cord conveyor belt, ensuring that no bubbles are generated in the joint of the steel cord conveyor belt, improving the vulcanization quality of the joint of the steel cord conveyor belt, and improving the service life of the steel cord conveyor belt; at the same time, the present invention undergoes two pressurization and temperature rising processes and constant temperature and pressure processes, and the pressure and temperature are gradually enhanced and increased, further improving the vulcanization quality of the joint of the steel cord conveyor belt, and significantly improving the service life of the steel cord conveyor belt. DETAILED DESCRIPTION

[0012] The present invention is used for the vulcanization process of the joint of the steel cord conveyor belt, and the vulcanization process comprises the following steps in sequence: a first pressurization and temperature increase step, a first constant temperature and pressure step, an exhaust step, a second pressurization and temperature increase step, a second constant temperature and pressure step and a natural cooling step, and the above steps are all carried out on the joint of the steel cord conveyor belt in a vulcanization device.

[0013] The inventors have concluded through a lot of practice and experiments that the preferred parameters of the above process are as follows: in the first pressurization and temperature increase process, the pressure is increased and the temperature is increased at the same time, the pressure is increased to 1-1.2 MPa, and the temperature is increased to 100° C. In order to reduce costs, the process of increasing the temperature to 100° C. is as follows: the temperature is increased to 95° C. by heating, and after stopping heating, the temperature continues to rise to 100° C. under the action of residual heat.

[0014] In the first constant temperature and constant pressure process, the constant pressure is 1.2MPa, the constant temperature is 100℃, the time is 10min, and 100℃ ensures that water vapor is generated in the joint of the steel cord conveyor belt.

[0015] During the exhaust process, the temperature was maintained at 100°C and the pressure gradually dropped from 1.2MPa to 0MPa.

[0016] In the second pressurization and temperature raising step, the pressure is raised to 1.7-1.8 MPa and the temperature is raised to 145°C±5°C.

[0017] In the second constant temperature and constant pressure process, the constant pressure is 1.7-1.8 MPa, the constant temperature is 145°C±5°C, and the time is 45 minutes.

[0018] During the natural cooling process, when the temperature of the wire rope conveyor belt joint drops below 80°C, the vulcanization equipment is removed, the joint is checked, the burrs are cut off, and the vulcanization process is completed.

[0019] In summary, the present invention is provided with an exhaust process, and the exhaust process discharges the water vapor generated in the joint of the steel cord core conveyor belt, thereby ensuring that no bubbles are generated in the joint of the steel cord core conveyor belt, improving the vulcanization quality of the joint of the steel cord core conveyor belt, and improving the service life of the steel cord core conveyor belt; at the same time, the present invention undergoes two pressurization and temperature increase processes and constant temperature and pressure processes, and the pressure and temperature are gradually enhanced and increased, which further improves the vulcanization quality of the joint of the steel cord core conveyor belt and significantly improves the service life of the steel cord core conveyor belt.

Claims

1. Vulcanization process for steel cord conveyor belt joints, characterized in that: The vulcanization process includes the following steps in sequence: a first pressurization and temperature increase step, a first constant temperature and pressure step, an exhaust step, a second pressurization and temperature increase step, a second constant temperature and pressure step, and a natural cooling step; In the first pressurization and temperature raising process, the pressure is raised to 1-1.2 MPa and the temperature is raised to 100°C. The process of raising the temperature to 100°C is as follows: the temperature is raised to 95°C by heating, and after the heating is stopped, the temperature continues to rise to 100°C under the effect of residual heat; In the first constant temperature and constant pressure process, the constant pressure is 1.2MPa, the constant temperature is 100℃, and the time is 10min; During the exhaust process, the temperature is maintained at 100°C and the pressure gradually decreases from 1.2MPa to 0Mpa; In the second pressurization and temperature raising process, the pressure is raised to 1.7-1.8 MPa and the temperature is raised to 145°C ± 5°C. In the second constant temperature and constant pressure process, the constant pressure is 1.7-1.8 MPa, the constant temperature is 145°C±5°C, and the time is 45 minutes.