Temperature control double-circulation control system for extruder in large-scale engineering radial tire winding process

Abstract

The utility model relates to a temperature-control double-circulation control system for an extruder in a large-scale engineering radial tire winding process, and belongs to the field of tire production. The screw rod, the plasticizing section, the extrusion section and the machine head share a set of four groups of independent circulating control temperature control systems; a circulating water pump, a circulating heater, a circulating storage tank, a circulating heat exchanger, a circulating inlet stop valve, a circulating return stop valve and a circulating inlet and return pipeline which are arranged on each group of temperature control system are respectively communicated with the screw rod, the plasticizing section, the extrusion section and the machine head to form a loop; the temperature control system of the plasticizing section is provided with a plasticizing return stop valve, a plasticizing inlet stop valve, a circulating return stop valve, a circulating inlet stop valve, a circulating return electric control valve and a circulating inlet electric control valve, is connected with a cooling water main inlet pipe and a cooling water main return pipe, and is respectively connected with the plasticizing section, the feeding section and the side pressure roller; and the circulating systems of the feeding section and the lateral compression roller are automatically controlled to be opened and closed through electromagnetic valves. According to the utility model, the problem that the product quality is directly influenced by easy breaking of the adhesive tape and the like can be solved.

Description

Technical Field

[0001] This utility model relates to the field of tire production equipment, specifically a temperature control dual-cycle control system for a large-scale engineering radial tire winding process extruder. Background Technology

[0002] As is well known, in the tire manufacturing process, the tread winding process is a crucial step in the production of the base and tread of large-scale engineering radial tires, directly impacting tire performance. To improve product quality, especially considering the unique environment of mining applications, in addition to considering the adhesion between components, it is also necessary to enhance the wear resistance of the tread. This necessitates modifications to the rubber compound formulations of the base and tread, resulting in a significant difference in hardness between the base and tread compounds. This leads to difficulties in feeding the extruder as the hardness increases. However, when both compounds are used together in a single pin-type cold-feed extruder, the traditional temperature control system can no longer simultaneously meet the production requirements of both compound formulations due to the significant hardness difference between the base and tread compounds. Traditional temperature control designs use separate cooling water control for the feeding section and the side pressure roller system to prevent abnormal temperature rise during the production process of rubber materials with low hardness that are prone to scorching. The plasticizing section, extrusion section, die head, and screw system are controlled separately by the temperature control system. However, if the temperature in the feeding section and the side pressure roller is too low, the rubber material hardness will directly affect the rubber feeding at the extruder feed port, resulting in insufficient rubber material in the barrel and die head. This causes large dimensional changes during the winding process and is prone to rubber strip breakage, which directly affects product quality and production efficiency. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this utility model provides a temperature control dual-circulation control system for extruders used in large-scale engineering radial tire winding processes. This system facilitates rubber feeding into the extruder and eliminates problems such as rubber strip breakage that directly affect product quality.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a temperature control dual-circulation control system for a large-scale engineering radial tire winding extruder, comprising an extruder base, a reducer installed above the rear end of the extruder base, the output end of the reducer connected to one end of the feeding section, a side pressure roller with water circulation function installed on the side of the feeding section, the other end of the feeding section connected to the plasticizing section, the plasticizing section connected to the extrusion section, the other end of the extrusion section connected to the die head, a double forming roller installed at the front end of the die head, and a screw parallel to the side pressure roller installed through the reducer output end, the feeding section, the plasticizing section, the extrusion section and the die head. The characteristic is that the screw, the plasticizing section, the extrusion section, and the... The extrusion section and die head have a total of four sets of independently controlled temperature control systems. Each set of temperature control systems is equipped with a circulating water pump, circulating heater, circulating storage tank, circulating heat exchanger, circulating inlet shut-off valve, circulating return shut-off valve, and circulating inlet and return pipelines, which are connected to the screw, plasticizing section, extrusion section, and die head to form a loop. The temperature control system of the plasticizing section is equipped with a plasticizing return shut-off valve, a plasticizing inlet shut-off valve, a circulating return shut-off valve, a circulating inlet shut-off valve, a circulating return electrically controlled valve, and a circulating inlet electrically controlled valve. The temperature control system is connected to the main cooling water inlet pipe and the main cooling water return pipe, which are connected to the plasticizing section, the feeding section, and the side pressure roller, respectively. The circulation system of the feeding section and the side pressure roller is automatically controlled by solenoid valves.

[0005] The circulating heat exchanger is connected to the main cooling water inlet pipe through a heat exchanger cooling solenoid valve and a heat exchanger cooling shut-off valve.

[0006] The cooling water main inlet pipe and cooling water main return pipe are respectively equipped with a cooling water inlet shut-off valve, a cooling water inlet solenoid valve, a cooling water return shut-off valve, and a cooling water return solenoid valve. The flow rate is regulated by the manual regulating valves of the side pressure roller return, the feeding section return, the side pressure roller inlet, and the feeding section inlet.

[0007] Each of the four individually cyclically controlled temperature control systems is equipped with a set of automatic temperature control instruments.

[0008] The beneficial effects of this utility model are that it increases the amount of rubber material stored in the barrel and the head, increases the internal pressure, ensures the stability of dimensions during the winding process, and eliminates problems that directly affect product quality, such as rubber strip breakage. This improves product quality and production efficiency, thereby meeting the market demand for higher wear resistance in tire tread patterns. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 This is a schematic diagram of the structure of the present invention.

[0011] Figure 2 This is a partially enlarged schematic diagram of the dual-circulation system of this utility model.

[0012] In the diagram: 1. Extruder base; 2. Reducer; 3. Feeding section; 4. Side pressure roller; 5. Plasticizing section; 6. Extrusion section; 7. Die head; 8. Double forming roller; 9. Locking device; 10. Screw; 11. Temperature control system; L1. Main cooling water inlet pipe; L2. Main cooling water return pipe; L3. Heat exchanger cooling shut-off valve; L4. Heat exchanger cooling solenoid valve; L5. Cooling water inlet shut-off valve; L6. Cooling water inlet solenoid valve; L7. Cooling water return shut-off valve; L8. Cooling water return solenoid valve; X1 1. Circulating water pump; X2. Circulating heater; X3. Circulating storage tank; X4. Circulating heat exchanger; X5. Plasticizing return shut-off valve; X6. Plasticizing inlet shut-off valve; X7. Circulating return shut-off valve; X8. Circulating return solenoid valve; X9. Circulating inlet shut-off valve; X10. Circulating inlet solenoid valve; T1. Side pressure roller return manual regulating valve; T2. Feeding section return manual regulating valve; T3. Side pressure roller inlet manual regulating valve; T4. Feeding section inlet manual regulating valve; K1. Control instrument; K2. Control manual switch. Detailed Implementation

[0013] In the figure, this utility model includes an extruder base 1. A reducer 2 is installed above the rear end of the extruder base 1. The output end of the reducer 2 is connected to one end of the feeding section 3. A side pressure roller 4 with water circulation function is installed on the side of the feeding section 3. The other end of the feeding section 3 is connected to the plasticizing section 5. The plasticizing section 5 is connected to the extrusion section 6. The other end of the extrusion section 6 is connected to the die head 7. A double forming roller 8 is installed at the front end of the die head 7 and connected by a locking device 9. The reducer 2 output end, the feeding section 3, the plasticizing section 5, the extrusion section 6 and the die head 7 are all connected. A screw 10 parallel to the side pressure roller 4 is installed throughout. The screw 10, plasticizing section 5, extrusion section 6 and die head 7 are connected to a set of four individually circulated temperature control systems 11. Each temperature control system 11 is equipped with a circulating water pump X1, a circulating heater X2, a circulating storage tank X3, a circulating heat exchanger X4, a circulating inlet shut-off valve X9, a circulating return shut-off valve X7 and circulating inlet and return pipelines, which are respectively connected to the screw 10, plasticizing section 5, extrusion section 6 and die head 7 to form a loop. The temperature control system 11 is connected to the main cooling water inlet pipe L1 and the main cooling water return pipe L2.

[0014] The circulating heat exchanger X4 is connected to the cooling water main inlet pipe L1 through the heat exchanger cooling solenoid valve L4 and the heat exchanger cooling shut-off valve L3, so that the heat exchanger cooling solenoid valve will automatically open to cool down when the temperature exceeds the set value.

[0015] The temperature control system 11 of the plasticizing section 5 is equipped with a plasticizing return shut-off valve X5, a plasticizing inlet shut-off valve X6, a circulation return shut-off valve X7, a circulation inlet shut-off valve X9, a circulation return solenoid valve X8, and a circulation inlet solenoid valve X10, which are respectively connected to the plasticizing section 5, the feeding section 3, and the side pressure roller 4. The circulation system of the feeding section 3 and the side pressure roller 4 uses a manual switching switch K2 to control the automatic opening and closing of the solenoid valves.

[0016] Cooling water inlet shut-off valve L5, cooling water inlet solenoid valve L6, cooling water return shut-off valve L7, and cooling water return solenoid valve L8 are installed on the main cooling water inlet pipe L1 and the main cooling water return pipe L2, respectively. The flow rate is adjusted by the manual regulating valve T1 for the side pressure roller return, the manual regulating valve T2 for the feeding section return, the manual regulating valve T3 for the side pressure roller inlet, and the manual regulating valve T4 for the feeding section inlet.

[0017] The temperature control system 11 is equipped with a set of automatic temperature control instruments K1, which automatically control the heating and cooling of the temperature control system according to the actual set temperature to ensure the stability of the system temperature.

[0018] During actual use, the function can be switched by changing the manual switch K2 on the temperature control system cabinet, specifically as follows:

[0019] During the winding process, after the shaping and bonding of the belt layer composite parts are completed, when the tire base is wound, the control instrument K1 of the temperature control system 11 is set according to the process standard temperature, and all shut-off valves on the circulation pipelines are opened. Automatic circulation heating or cooling is controlled by the control instrument K1 and all electrically controlled valves to ensure that the temperatures of the screw 10, extrusion section 6, and die head 7 are within the process standard control range. To ensure stable and uniform rubber feeding in the feeding section 3 and to avoid the tendency of soft rubber to scorch, the manual switch K2 on the temperature control system 11 is switched to the cooling position. The circulation return electrically controlled valve X8 and circulation inlet electrically controlled valve X10 in the temperature control system 11 of the plasticizing section 5 are simultaneously closed, while the cooling water inlet electrically controlled valve L6 on the main cooling water inlet pipe L1 and the cooling water return electrically controlled valve L8 on the main cooling water return pipe L2 are simultaneously opened, thus cooling the tire base. Water flows through the main cooling water inlet pipe L1, cooling water inlet shut-off valve L5, cooling water inlet solenoid valve L6, and manual regulating valve T3 into the side pressure roller 4. After internal circulation, water flows back through the side pressure roller manual regulating valve T1, cooling water return solenoid valve L8, and cooling water return shut-off valve L7 into the main cooling water return pipe L2, thus forming a circulating cooling function for the side pressure roller 4. Simultaneously, another stream of cooling water flows through the main cooling water inlet pipe L1, cooling water inlet shut-off valve L5, cooling water inlet solenoid valve L6, and manual regulating valve T4 into the feeding section below. After internal circulation, water flows into the feeding section above, then back through the feeding section manual regulating valve T2, cooling water return solenoid valve L8, and cooling water return shut-off valve L7 into the main cooling water return pipe L2, forming a circulating cooling function for the feeding section 3. This ensures the normal cooling circulation function of the feeding section 3 and the side pressure roller 4 during normal winding of the tire base.

[0020] After the tire base is wound, since the temperature of the feeding section 3 and the side pressure roller 4 in the plasticizing section 5 needs to be adjusted, the temperature process standards of the screw 10, extrusion section 6, and die head 7 are the same as those of the tire base and tread. Therefore, to ensure the stability and uniformity of the rubber feeding in the feeding section 3, and to avoid the problem of insufficient internal rubber due to difficulty in feeding hard rubber, the manual switch K2 on the temperature control system 11 is switched to the heating position. The circulation return solenoid valve X8 and the circulation inlet solenoid valve X10 in the temperature control system 11 of the plasticizing section 5 are opened simultaneously. Simultaneously closing the cooling water inlet solenoid valve L6 on the main cooling water inlet pipe L1 and the cooling water return solenoid valve L8 on the main cooling water return pipe L2, the circulating water from the temperature control system 11 of the plasticizing section 5 enters the side pressure roller 4 through the circulation inlet shut-off valve X9, circulation inlet solenoid valve X10, and side pressure roller inlet manual regulating valve T3. After internal circulation, it enters the side pressure roller return manual regulating valve T1, circulation return solenoid valve X8, and circulation return shut-off valve X7, then enters the circulating water pump X1, circulating heater X2, circulating storage tank X3, and circulating heat exchanger X4, forming... While the side pressure roller 4 is in operation, another path of circulating water from the temperature control system of the plasticizing section 5 enters the lower part of the feeding section 3 via the circulating inlet shut-off valve X9, the circulating inlet solenoid valve X10, and the feeding section manual regulating valve T4. After internal circulation, the water enters the upper part of the feeding section 3, then returns via the feeding section manual regulating valve T2, the circulating return solenoid valve X8, and the circulating return shut-off valve X7, before entering the circulating water pump X1, the circulating heater X2, the circulating storage tank X3, and the circulating heat exchanger X4. This forms the circulating heating function of the feeding section 3, ensuring normal tire tread winding. During normal heating and circulation of the feeding section 3 and the side pressure roller 4, if the actual temperature of the control instrument K1 reaches the upper limit of the set temperature, the circulating heater X2 will be automatically shut off, and the heat exchanger cooling shut-off valve L3 and the heat exchanger cooling solenoid valve L4 on the main cooling water inlet pipe L1 will be opened to cool the system. When the actual temperature reaches the lower limit of the set temperature, the heat exchanger cooling solenoid valve L4 on the main cooling water inlet pipe L1 will be automatically closed, and the circulating heater X2 will be automatically turned on to heat, forming a stable process temperature control.

[0021] According to different formulations and hardness of rubber compounds, the temperature control system is switched to the appropriate circulation system in a timely manner to ensure the continuity of rubber feeding and reduce the burning of rubber compounds. This increases the amount of rubber compound in the barrel and the die head, increases internal pressure, ensures dimensional stability during the winding process, and eliminates problems that directly affect product quality, such as rubber strip breakage. This improves product quality and production efficiency, thereby meeting the market demand for higher wear resistance in tire tread patterns.

[0022] This utility model's feeding section and side pressure roller system employ separate cooling water control, and adds electromagnetic automatic control, which is connected in parallel with the plasticizing section temperature control through an electromagnetic automatic control system. This ensures that when extruding the rubber compound for tire base and tread, the control switch can be switched to the cooling position when producing tire base rubber compound and to the heating position when producing harder tread rubber compound. This allows the harder rubber compound to be preheated and softened at the feed inlet, which is more conducive to rubber feeding into the extruder.

Claims

1. A temperature control dual-circulation control system for a large-scale engineering radial tire winding extruder, comprising an extruder base, a reducer installed above the rear end of the extruder base, the output end of the reducer connected to one end of the feeding section, a side pressure roller with water circulation function installed on the side of the feeding section, the other end of the feeding section connected to the plasticizing section, the plasticizing section connected to the extrusion section, the other end of the extrusion section connected to the die head, a double forming roller installed at the front end of the die head, and a screw parallel to the side pressure roller installed through the reducer output end, the feeding section, the plasticizing section, the extrusion section, and the die head, characterized in that... The screw, plasticizing section, extrusion section, and die head share a set of four independently controlled temperature control systems. Each temperature control system is equipped with a circulating water pump, circulating heater, circulating storage tank, circulating heat exchanger, circulating inlet shut-off valve, circulating return shut-off valve, and circulating inlet and return pipelines, which are connected to the screw, plasticizing section, extrusion section, and die head to form a loop. The temperature control system of the plasticizing section is equipped with a plasticizing return shut-off valve, a plasticizing inlet shut-off valve, a circulating return shut-off valve, a circulating inlet shut-off valve, a circulating return electrically controlled valve, and a circulating inlet electrically controlled valve. The temperature control system is connected to the main cooling water inlet pipe and the main cooling water return pipe, which are connected to the plasticizing section, the feeding section, and the side pressure roller, respectively. The circulation systems of the feeding section and the side pressure roller are automatically controlled by solenoid valves.

2. The temperature control dual-circulation control system for the extruder in the large-scale engineering radial tire winding process according to claim 1, characterized in that... The circulating heat exchanger is connected to the main cooling water inlet pipe through a heat exchanger cooling solenoid valve and a heat exchanger cooling shut-off valve.

3. The temperature control dual-circulation control system for the extruder in the large-scale engineering radial tire winding process according to claim 1, characterized in that... The cooling water main inlet pipe and cooling water main return pipe are respectively equipped with a cooling water inlet shut-off valve, a cooling water inlet solenoid valve, a cooling water return shut-off valve, and a cooling water return solenoid valve. The flow rate is regulated by the manual regulating valves of the side pressure roller return, the feeding section return, the side pressure roller inlet, and the feeding section inlet.

4. The temperature control dual-cycle control system for the extruder in the large-scale engineering radial tire winding process according to claim 1, characterized in that... Each of the four individually cyclically controlled temperature control systems is equipped with a set of automatic temperature control instruments.

Images