With the continuous development of domestic automobile industry and tire industry, the requirements of tire uniformity are comprehensively improved, which puts forward higher and higher requirements for the working accuracy of vulcanizing press, and the advantages of hydraulic curing press are fully demonstrated. As a new technology, hydraulic vulcanizing press has been mature and mass produced in foreign countries and widely used in tire vulcanization. The proportion of hydraulic curing press used by major tire companies in the world is more than 70%, and the trend is increasing. The development of hydraulic vulcanizing press is limited by the failure of domestic hydraulic components.
By the end of 2010, the proportion of China's hydraulic vulcanizing press in tire factories was no more than 10%. With the advantages of hydraulic curing press, it has been widely recognized by tire enterprises in China, especially in high-grade radial tire projects, the trend of using hydraulic curing press is obvious. More than 50% of the new radial vulcanizing press project uses hydraulic pressure on the new radial tire line.
It is the first leap for tire curing to popularize and apply mechanical vulcanizing press to replace vulcanizing tank, and the second leap to replace mechanical vulcanizing press with hydraulic curing press. Hydraulic vulcanizing press is developed on the basis of mechanical vulcanizing press. It absorbs the advantages of mechanical curing press and overcomes the inherent weakness of mechanical vulcanization press. Hydraulic vulcanizing press has the advantages of high precision and automation, excellent uniformity and quality of vulcanized tires, and is suitable for curing radial tires, especially for high-grade radial tires. It is an indisputable trend that the hydraulic curing press will replace the mechanical vulcanizing press.
Hydraulic vulcanizing press has become the trend of mechanical reform in tire and rubber industry, and has been growing as a new economic growth point of the industry.
Germanjet new H series built in type for tire curing press Displacement sensor
Structure diagram of H series built-in sensor installed in oil cylinder
Germanjet magnetostriction Displacement sensor Characteristics of hydraulic vulcanizing press
1. Effectively improve the utilization rate of vulcanizing machine: the height of the upper ring of the tire loading mechanism and the central mechanism can be arbitrarily and accurately controlled by the built-in germanjet displacement sensor in the oil cylinder, and the accuracy can reach 0.001mm, which is of great significance for vulcanizing tires of different specifications;
The displacement sensor can be easily connected with the control system on the left and right frame of the machine, and the clamping distance of each mold cavity can be controlled independently by the linear displacement sensor.
2. Improve the precision of tire setting: because the curing press body is a fixed frame type, with compact structure and good rigidity, the deformation is small under the action of vertical clamping force of oil cylinder with built-in sensor, which is beneficial to tire life and tire quality. From the force point of view, when opening and closing the mold, the upper mold only moves vertically under the precise measurement of the sensor. Under the action of the clamping force, the small deformation of the frame is symmetrical with the center line of the mold, which can maintain high centering accuracy and repetition accuracy.
In this way, not only the accuracy of the machine is improved, but also the precision of the tire setting is greatly improved by the accuracy of the sensor.
3. Easy to maintain: germanjet magnetostrictive displacement sensor does not need to relieve pressure. It can directly separate the stainless steel pressure resistant outer tube installed in the oil cylinder and its internal stainless steel waveguide rod That is to carry out the sensor detection and maintenance work, and the curing machine from the design of the pursuit of simple and effective action, basically no vulnerable parts, spare parts need to be replaced, to avoid the mechanical curing machine, such as regular repair, overhaul, greatly reducing the characteristics of user operating costs.
Hydraulic curing press for small tire
Large double mold hydraulic vulcanizing press
The upper ring lifting cylinder of hydraulic vulcanizing press adopts MTS / baruff / germanjet magnetostrictive displacement sensor The detection technology makes the retraction and positioning of the capsule accurate and reliable, so as to meet the needs of different sizes of embryo. Therefore, it provides an effective guarantee for the dynamic balance of high-grade radial tire. The tire mounting mechanism adopts the cylinder lifting and cylinder rotating type. The center positioning sleeve of the tire gripper can automatically align and locate with the piston rod of the central mechanism, which ensures the accurate tire positioning and high repetition accuracy.
The electrical control system of hydraulic vulcanizing press generally adopts the latest PLC control system of the United States and pv550 human-machine interface (touch screen) technology to monitor and calculate the collected vulcanization data parameters, so that the control is reliable and stable. All function keys can be set through the interface touch screen, which simplifies the operation panel, and has programmable fault display alarm function, which is convenient for equipment troubleshooting. With the application of integrated thermal system control theory, the number of single actuator is simplified, the cost is reduced, and the vulcanization temperature and pressure fluctuation is small, which provides guarantee for curing high-grade radial tire.