On August 27, an “Innovative, Reliable and Efficient” product presentation was held in Beijing by Beijing Jingyie Mechanical Equipment Co., Ltd. to release a new automatic two-stage semi-steel radial tire moulding machine to tire enterprises at home and abroad. This equipment is characterized by complete automation and high efficiency. For example, its cycling time of single tire is only 28s; only one operator is enough for the whole production process; and the production for every shift exceeds 750 tires. The successful launch of this equipment not only provides tires enterprises with brand new efficient automatic moulding machine, but also presents a great gift for the 20th anniversary of Beijing Jingyie.
According to Liu Shangyong, deputy general manager and head of technology R&D of Beijing Jingyie Mechanical Equipment Co., Ltd., the equipment has been awarded 2 national invention patents and 2 patents for utility models. It applies to tire moulding with rim diameter of 14~20 cun as its width range of the first-stage moulding head is 260~600mm and second-stage moulding head is 140~650mm; maximum outer diameter of raw tire is 880mm; total installed capacity is 125KW; and the control system adopts programmable logic controller, alternating current servo system, CCD automatic deviation correction system, AC variable frequency speed regulating and man-machine operation interface control.
The equipment has the following innovation highlights. Firstly, with the multi-drum structure, the moulding efficiency raises. By using three drums in the first-stage machine and four drums in the second-stage machine, the work process previously completed within one drum is distributed to more drums and carried out simultaneously, which greatly improve the moulding efficiency. Secondly, with retractable bead setting ring, the width of the first-stage moulding drum can adjust automatically. Thirdly, the tire billet is transmitted and loaded automatically. Fourthly, with the low-angle cutting of side tire, the flatness of joints is promoted. Fifthly, with the full-width ultrasonic cutting, the geometric dimensioning of the fracture surface maintains the same level. Sixthly, the flat drum is used for plying up the tire casing to ensure the quality of joints. Seventhly, real-time detection technology is adopted during the process of belt and tread plying-up.
Regarding quality assurance, all materials must be placed in the center and can be corrected automatically on production line; the inside liner and tread head can be processed automatically; real-time detection of material plying-up will be available to conduct material width detection, realizing automatic coding and code-scanning; the equipment has intelligent control of let-off condition, for example, workers could only change the materials after the machine halted in the past, but now the machine will remind the operator in advance when the materials run low; the equipment achieves tension control on the cap ply; it has the functions of automatic length fixing, length measurement and compensation and by adjusting the speed of drums, it can ensure better joining between joints of tire casing; in addition, this equipment achieves complete automation for tire production process, which greatly reduces the man-made influences on tire quality.
Only one operator is enough for the whole production process. This operator just needs to do three things well: hanging the tire bead, handling the alarms and looking at the side tire jointing, which largely reduces the labor cost of tire enterprise. The cycling time of the first-stage and second-stage machine is 28s, shorter than that of the single-stage moulding machine. In the presentation site of the equipment, participants observed the full-automatic moulding process of 24 tires. The whole operation process is safe, reliable and efficient. According to field test of the participants, the moulding time for per tire is 25~28s.
According to Liu Shangyong, the equipment has the following advantages during the production application. Firstly, high operation rate. This machine adopts double-station reloading with one strip of materials cut for cord fabric and tread; the inside liner and tread head can be processed automatically; the width of the first-stage moulding drum can be adjusted automatically; all materials must be plying up the shelf for servo control and the height of plying-up can be adjusted according to the specification. In addition, customers can also choose full-scale automatic setting and adjustment for belt drum and carrier ring. The retractable machine head can be adjusted between two adjacent numbers of cun. Secondly, high output. If it is calculated by eight-hour day (6.5 hours for equipment operation), the output per shift is up to over 750 units without change of specification; however, the output per shift can still achieve over 700 units when it is changed three times under the same specification. Thirdly, high tooling integration. With the aims of no change, less change or fast change during the R & D, the number of tooling in this equipment is greatly reduced, which simplifies the management procedure. In addition, this equipment also equips with visible system to ensure personal safety and equipment safety by safety monitoring picture, security start-stop and closed-loop motion control for key parts. Meanwhile, this equipment also installs MES system management interface as well as automatic coding and code-scanning.
Liu Shangyong told the reporter that because of the application of servo control to this equipment, the tire billet can be transmitted and loaded automatically with high centering precision and hardly any loss of precision during the production process. According to some participant enterprises, compared with single-stage moulding machine, two-stage moulding machine has the advantage of large specification coverage and can be applied to tires for saloon car and light truck. At present, two-stage moulding machine still dominates among domestic semi-steel tire production equipment. High-efficient automatic two-stage moulding machine successfully developed by Beijing Jingyie provides equipment support to tire enterprises for intelligent production as well as transformation and upgrading.
“This year is the 20th anniversary of Beijing Jingyie. As a professional enterprise for tire moulding machine research and manufacture, staff of Beijing Jingyie always adhere to the mission of Moulding High-performance Tires and Serving High-quality Customers, keep trying, make bold innovation, focus on professional work and service the industry and society, forming high-end customer groups. This new high-efficient two-stage tire moulding machine is a result of the wisdom and efforts of staff of Beijing Jingyie for three-year innovation and R & D and also carries the expectation and best wishes of our customers to Beijing Jingyie”, said Sun Lin, general manager of Beijing Jingyie.
It is said that the user of the first set of new automatic two-stage semi-steel tire moulding machine is Kenda Industrial Co., Ltd., whose deputy general manager Chen Zhaorong said that Beijing Jingyie kept improving and innovating moulding machine products to meet customers’ requirements during their more than ten-year’s cooperation and they wished this new machine would bring Kenda more benefits. Besides, representatives of Indian JK Company also showed significant interest in this new equipment of Beijing Jingyie.
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