High-speed raw material kneading machine for rubber ring production

Abstract

The invention provides a high-speed raw material kneading machine for rubber ring production, belongs to the technical field of rubber ring production, and solves the technical problems of insufficient kneading of existing rubber ring raw materials, poor kneading effect, inconvenience in cleaning and the like. Comprising a base, an external filter box, an external automatic cleaning box, a fan and a steam generator, a speed reducer and a first driving motor are fixed to the right side of the upper end of the base, a kneading cylinder mechanism is arranged on the base, a cover turning mechanism is arranged on the front side of the kneading cylinder mechanism, and a closing plate mechanism, a mixing mechanism and an extruding mechanism are arranged in the kneading cylinder mechanism; a water pump, a third driving motor and a multi-way valve are arranged on the base. The rubber ring raw materials can be rapidly mixed, fully kneaded and automatically extruded, automatic cleaning can be achieved, meanwhile, sealing and heat insulation are achieved, heat loss is reduced, energy conservation and environmental protection are achieved, and when the closing plate mechanism is folded, it is guaranteed that the outer side arc-shaped face is clean, the next kneading work is not affected, the kneading temperature is adjusted in real time, and the optimal kneading effect of rubber rings of different raw materials is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber ring production, and relates to a high-speed kneading machine, in particular to a high-speed kneading machine for raw materials used in rubber ring production. Background Art

[0002] After rubber materials were discovered and began to be used, people gradually realized that their good elasticity, sealing and other properties could be used to make ring-shaped parts to meet the needs of different scenarios, and rubber ring production came into being. With the development of the industrial revolution, the level of mechanical manufacturing has been greatly improved, and rubber ring production technology has entered an important development stage. Now, kneading machines are often used for kneading of rubber ring raw materials.

[0003] However, the existing rubber ring production is closely related to the quality of the rubber ring raw materials. The existing high-speed kneading machines for rubber ring raw material production have problems such as insufficient kneading, poor kneading effect and inconvenient cleaning, which makes it difficult to meet the quality requirements of rubber ring production for raw materials.

[0004] Therefore, we propose a high-speed kneading machine for raw materials for rubber ring production, which can quickly mix, fully knead and automatically extrude the rubber ring raw materials, can be automatically cleaned, and at the same time sealed and heat-insulated to reduce heat loss, save energy and be environmentally friendly. When the closing plate mechanism is folded, the outer arc surface is kept clean and does not affect the next kneading work. The kneading temperature is adjusted in real time to ensure the best kneading effect of rubber rings with different raw materials. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a high-speed kneading machine for raw materials for rubber ring production. The technical problem to be solved by the invention is: how to realize the automated operations of rapid mixing, sufficient kneading, automatic extrusion and automatic cleaning of the rubber ring raw materials, while sealing and insulating during kneading to reduce heat loss, and when the closing plate mechanism is folded, ensure that the outer arc surface is clean and does not affect the next kneading work, and adjust the kneading temperature in real time to ensure the best kneading effect of rubber rings with different raw materials.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A high-speed kneading machine for raw materials used in rubber ring production comprises a base, an external filter box, an external automatic cleaning box, a fan and a steam generator. A reducer and a driving motor 1 are fixed on the right side of the upper end of the base. The output shaft of the driving motor 1 is transmission-connected with the input shaft of the reducer. A kneading cylinder mechanism is provided on the base. A flip cover mechanism is provided on the front side of the kneading cylinder mechanism. A closing plate mechanism, a mixing mechanism and an extrusion mechanism are provided inside the kneading cylinder mechanism. The mixing mechanism is transmission-connected with the input shaft of the reducer. A water pump, a driving motor 3 and a multi-way valve are provided on the base. The closing plate mechanism is transmission-connected with the output shaft of the driving motor 3. The external water tank, the water pump, the multi-way valve, the steam generator, the kneading cylinder mechanism and the external cooling box are connected in sequence through pipelines. The external cooling box is connected to the external water tank through a pipeline. The flip cover mechanism, the external filter box and the fan are connected in sequence through pipelines. The external automatic cleaning box and the flip cover mechanism are connected through a pipeline.

[0007] The working principle of the present invention is as follows: the staff checks and debugs the equipment, replaces the worn parts, the flip cover mechanism moves, and no longer conflicts with the kneading cylinder mechanism, the closing plate mechanism moves and extends to close, then the staff injects the raw materials of the rubber ring into the kneading cylinder mechanism in proportion, after injection, the flip cover mechanism moves, and conflicts with the kneading cylinder mechanism again, then the output shaft of the driving motor 1 drives the movement of the reducer, the output shaft of the reducer drives the mixing mechanism to move, the mixing mechanism moves in the kneading cylinder mechanism, quickly kneads the rubber ring raw materials to form kneading glue, and kneading is completed, then the closing plate mechanism moves to be retracted and opened, the kneading cylinder mechanism cleans the residual material on the closing plate mechanism, the kneading glue falls into the extrusion mechanism, and is extruded by the extrusion mechanism to form a mixed glue; During kneading, the water pump pumps the water in the external water tank into the steam generator through the multi-way valve. After the steam is generated by the steam generator, it is transported to the kneading cylinder mechanism to heat the kneading cylinder mechanism and increase the temperature during kneading. The heated steam is transported to the external cooling box, cooled by the external cooling box and then transported to the external water tank. The kneading temperature is monitored in real time. When the temperature is too high, the water pump is controlled to pump the water in the external water tank into the kneading cylinder mechanism through the multi-way valve to cool the kneading cylinder mechanism and reduce the temperature during kneading. The temperature is adjusted in real time. During kneading, the fan is started to draw the kneading waste gas in the kneading cylinder mechanism into the external filter box, and then enter the fan after being filtered by the external filter box and discharged through the fan; After kneading and extrusion are completed, cleaning is carried out. The external automatic cleaning box sprays the cleaning liquid into the kneading cylinder mechanism through the flip cover mechanism to clean the kneading cylinder mechanism, the mixing mechanism and the extrusion mechanism. At the same time, the kneading cylinder mechanism is cooled down to facilitate the next kneading. The cleaning waste liquid is discharged through the extrusion mechanism and collected by the staff.

[0008] A fixing frame 1 and two fixing frames 2 are arranged on the base, and the two fixing frames 2 are respectively located at the middle part of the upper end and the right side of the upper end of the base.

[0009] With the above structure, the first fixing frame is used to install the driving motor 1 and the reducer, and the two second fixing frames are used to install the kneading cylinder mechanism.

[0010] The kneading cylinder mechanism comprises a fixed side plate 1 and a fixed side plate 2, which are respectively detachably arranged on two fixed frames 2, a kneading cylinder body is fixed between the fixed side plate 1 and the fixed side plate 2, the kneading cylinder body is composed of an inner wall body and an outer wall body, the outer wall body of the kneading cylinder body is U-shaped, a plurality of connecting plates, a plurality of cooling pipes, a plurality of temperature sensors and a plurality of steam pipes are arranged between the inner wall body and the outer wall body of the kneading cylinder body, the cooling pipes and the steam pipes are arranged alternately, the water inlets of the plurality of cooling pipes are connected to the water outlets of the external water tank through pipes, the water outlets of the plurality of cooling pipes are connected to the external cooling box through pipes, the air outlet of the steam generator The air inlets of several steam pipes are connected through high-temperature resistant air pipes, and the air outlets of several steam pipes are connected to the air inlet of the external cooling box through pipes. The kneading cylinder is provided with a kneading chamber 1, an extrusion chamber and a kneading chamber 2 from back to front. A closing mouth and an arc-shaped mounting mouth are provided at the bottom of the extrusion chamber. The arc-shaped mounting mouth is located outside the closing mouth, and the closing mouth is connected with the arc-shaped mounting mouth. A plurality of sliding grooves and a plurality of arc-shaped avoidance mouths are provided at the bottom of the extrusion chamber. The arc-shaped avoidance mouths are connected with the sliding grooves at corresponding positions. A cleaning plate is detachably provided at the upper end of the front side of the kneading chamber 1, and a scraper plate is fixed at the end of the cleaning plate. The scraper plate is made of chlorosulfonated polyethylene rubber.

[0011] With the above structure, the staff checks the kneading cylinder and the cleaning plate. During kneading, the water pump pumps the water in the external water tank into the steam generator through the multi-way valve. After the steam is generated by the steam generator, it is transported to the air inlets of several steam pipes to heat the kneading cylinder, increase the temperature during kneading, and then transport it to the external cooling box from the air outlets of several steam pipes. After being cooled in the external cooling box, it is transported to the external water tank. Several temperature sensors monitor the temperature during kneading in real time. When the temperature is too high, the water pump is controlled to pump the water in the external water tank into the several cooling pipes through the multi-way valve, cool the kneading cylinder through the several cooling pipes, reduce the temperature during kneading, and adjust in real time. Fixed side plate 1 and fixed side plate 2 are used to fix and seal the kneading cylinder, and kneading roller 1 and kneading roller 2 are installed at the same time. Several connecting plates are used to fix the inner wall and outer wall of the kneading cylinder. Kneading chamber 1 and extrusion chamber are used for kneading. The extrusion chamber is used to extrude the kneading rubber. The closing mouth, several sliding grooves and several arc-shaped avoidance mouths are used for the movement of the closing plate mechanism. The arc-shaped installation mouth is used to install the closing plate mechanism. The cleaning plate is easy to replace. The scraper plate is used to clean the residual material on the outside of the closing plate mechanism.

[0012] The mixing mechanism comprises a kneading roller 1 and a kneading roller 2, the two ends of the kneading roller 1 and the two ends of the kneading roller 2 are respectively rotatably arranged on a fixed side plate 1 and a fixed side plate 2 at corresponding positions, the kneading roller 1 and the kneading roller 2 are connected by a gear pair, the end of the kneading roller 2 is fixedly connected to the output shaft of the reducer, and the kneading roller 1 and the kneading roller 2 are both provided with a plurality of stirring blades, and the plurality of stirring blades are in contact with the kneading chamber 1 and the kneading chamber 2 at corresponding positions.

[0013] With the above structure, the output shaft of the driving motor 1 drives the reducer to move, the output shaft of the reducer drives the kneading roller 2 to rotate, the kneading roller 2 drives the kneading roller 1 to rotate, and at the same time drives a number of stirring blades at corresponding positions to rotate, the several stirring blades of the kneading roller 1 cooperate with the several stirring blades of the kneading roller 2 to quickly knead the rubber ring raw materials to form kneaded rubber.

[0014] The extrusion mechanism includes a second drive motor, an extrusion chamber and an extrusion screw. The extrusion chamber is fixed on the right end face of the first fixed side plate, and the extrusion chamber is connected to the inside of the kneading cylinder. The extrusion screw is rotatably arranged on the second fixed side plate, and the extrusion screw is in contact with the extrusion chamber. The output shaft of the second drive motor is transmission-connected to the left end of the extrusion screw, and the right end of the extrusion screw extends into the interior of the extrusion chamber.

[0015] With the above structure, the output shaft of the second driving motor drives the extrusion screw to rotate in the extrusion cavity. The rotation of the extrusion screw transports the kneaded rubber falling in the extrusion cavity to the extrusion chamber, and the rubber is extruded after the last kneading in the extrusion chamber to form a mixed rubber.

[0016] The flip cover mechanism comprises a fixed plate, a fixed frame three, a cleaning pipe and a heat-insulating cover plate. The fixed plate and the fixed frame three are fixedly arranged on the base, and the fixed plate is located at the rear side of the fixed frame three. A heat-insulating ring is arranged on the lower end surface of the heat-insulating cover plate, and the heat-insulating cover plate abuts against the upper end surface of the kneading cylinder. A V-shaped frame, an air exhaust port and a liquid injection port are arranged on the heat-insulating cover plate. One end of the V-shaped frame is fixed to the rear side of the upper end of the heat-insulating cover plate, and the V-shaped frame is hinged to the upper end of the fixed frame three. An electric push rod is hinged between the other end of the V-shaped frame and the fixed plate. The air exhaust port is connected to the external filter box through a pipeline. The liquid inlet of the cleaning pipe is detachably arranged in the liquid injection port. The end of the cleaning pipe is fixed to the lower end surface of the heat-insulating cover plate. The cleaning pipe is located directly above the extrusion screw, and the axis of the cleaning pipe is parallel to the axis of the extrusion screw. A plurality of inclined nozzles are arranged on the cleaning pipe, and the liquid injection port is connected to the external automatic cleaning box through a pipeline.

[0017] With the above structure, when adding materials, the telescopic end of the electric push rod contracts to drive the V-shaped frame to move, and the V-shaped frame drives the heat insulation cover to move, so that the heat insulation cover leaves the upper end surface of the kneading cylinder, and the staff adds various rubber ring materials; When kneading, the telescopic end of the electric push rod extends out, driving the V-shaped frame to move, and the V-shaped frame drives the heat insulation cover to move, so that the heat insulation cover hits the heat insulation ring for heat insulation, reducing heat loss; During kneading, the fan is started to allow the kneading waste gas in the kneading cylinder to enter the external filter box through the air intake port, enter the air inlet of the fan after being filtered by the external filter box, and then be discharged from the air outlet of the fan; After kneading, the external automatic cleaning box injects the cleaning liquid into the cleaning pipe through the liquid injection port, and sprays the cleaning liquid to the front and back sides of the kneading cylinder through several inclined nozzles on the cleaning pipe, and cools down the kneading cylinder mechanism at the same time, which is convenient for the next kneading. During cleaning, the output shaft of the driving motor 1 drives the reducer to move, and the output shaft of the reducer drives the kneading roller 2 to rotate, and the kneading roller 2 drives the kneading roller 1 to rotate, and drives several stirring blades at corresponding positions to rotate, respectively cleaning the residual waste in the kneading chamber 1 and the kneading chamber 2, and conveying the cleaning waste liquid to the extrusion chamber to clean the extrusion screw. The output shaft of the driving motor 2 drives the extrusion screw to rotate, and conveys the cleaning waste liquid to the extrusion chamber, and is discharged through the extrusion chamber and collected by the staff. The fixed frame 3 provides support to facilitate the opening and closing of the insulation cover.

[0018] The closing plate mechanism includes an arc-shaped closing plate and a transmission shaft. The arc-shaped closing plate is slidably arranged inside the closing mouth. A plurality of arc-shaped racks are arranged on the outer side of the arc-shaped closing plate. The plurality of arc-shaped racks are slidably arranged in sliding grooves at corresponding positions. The length of the sliding groove is equal to twice the length of the arc-shaped racks. The transmission shaft is rotatably arranged at the bottom of the connecting plate. The end of the transmission shaft is transmission-connected to the output shaft of the driving motor three. A plurality of driving gears are fixed on the transmission shaft. The plurality of driving gears are arranged in arc-shaped avoidance openings at corresponding positions. The plurality of driving gears are meshed with the arc-shaped racks at corresponding positions.

[0019] With the above structure, during injection and kneading, the output shaft of the driving motor 3 drives the transmission shaft to rotate, the transmission shaft drives a number of driving gears to move in the arc-shaped avoidance opening at the corresponding position, the number of driving gears drives the arc-shaped racks at the corresponding position to move, and the number of arc-shaped racks moves along the sliding grooves at the corresponding position, thereby driving the arc-shaped closing plate to slide in the closing opening, so that the arc-shaped closing plate extends out and contacts the front end of the extrusion cavity, thereby preventing the rubber ring raw material and the kneading rubber from falling into the extrusion cavity, resulting in insufficient kneading of the rubber ring raw material; When extruding and kneading the rubber, the output shaft of the driving motor three drives the transmission shaft to rotate, the transmission shaft drives a number of driving gears to move in the arc-shaped avoidance openings at corresponding positions, a number of driving gears drive the arc-shaped racks at corresponding positions to move, a number of arc-shaped racks move along the sliding grooves at corresponding positions, thereby driving the arc-shaped closing plate to slide in the closing opening, so that the arc-shaped closing plate is retracted and flush with the rear end face of the extrusion cavity. When retracting, the scraper plate at the end of the cleaning plate contacts the outer arc-shaped surface of the arc-shaped closing plate to scrape off the residual material on the outer side of the arc-shaped closing plate.

[0020] Compared with the existing technology, this high-speed kneading machine for raw materials used in rubber ring production has the following advantages: 1. It opens and closes automatically through the flap mechanism and cooperates with the kneading cylinder mechanism to seal and insulate, reduce heat loss, and save energy and protect the environment.

[0021] 2. By closing the closing plate mechanism, the rubber ring raw material and the kneading rubber are prevented from falling into the extrusion cavity during feeding and kneading, ensuring that the rubber ring raw material is fully kneaded.

[0022] 3. The kneading cylinder mechanism cooperates with the mixing mechanism to quickly mix, and cooperates with the closing plate mechanism to fully and efficiently knead. At the same time, when the closing plate mechanism is retracted, the cleaning plate and the scraper plate on the kneading cylinder mechanism cooperate to scrape the outer curved surface of the closing plate mechanism to ensure that the outer curved surface is clean and does not affect the next kneading work.

[0023] 4. The kneading temperature can be adjusted in real time through the cooperation of the external water tank, multi-way valve, steam generator, kneading cylinder mechanism, external cooling box and water pump to ensure the best kneading effect of rubber rings of different raw materials.

[0024] 5. The kneaded rubber is further kneaded through the extrusion mechanism to form a mixed rubber and extrude it to achieve automatic extrusion.

[0025] 6. The external automatic cleaning box cooperates with the flip cover mechanism, kneading cylinder mechanism, mixing mechanism and extrusion mechanism to automatically clean and cool the kneading cylinder mechanism to facilitate the next kneading. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the rear three-dimensional structure of the present invention.

[0028] Figure 3 It is a three-dimensional structural schematic diagram of the base in the present invention.

[0029] Figure 4 It is a schematic diagram of the right three-dimensional structure of some components in the present invention.

[0030] Figure 5 It is a schematic diagram of the left three-dimensional structure of some components in the present invention.

[0031] Figure 6 It is a schematic diagram of the top view of the structure of some components in the present invention.

[0032] Figure 7 It is a schematic diagram of the upper three-dimensional structure of the flip cover mechanism in the present invention.

[0033] Figure 8It is a schematic diagram of the bottom three-dimensional structure of the flip cover mechanism in the present invention.

[0034] Fig. 9 It is a three-dimensional structural schematic diagram of the closing plate mechanism in the present invention.

[0035] Fig.10 It is a schematic diagram of the three-dimensional structure of the kneading cylinder in the present invention.

[0036] Fig.11 yes Fig.10 Schematic diagram of the enlarged structure at point A in the middle.

[0037] Fig.12 It is a partial cross-sectional view of the kneading cylinder in the present invention.

[0038] Fig.13 It is a schematic diagram of the three-dimensional structure of the cleaning plate in the present invention.

[0039] In the figure, 1, reducer; 2, drive motor 1; 3, drive motor 2; 4, base; 5, water pump; 6, drive motor 3; 7, multi-way valve; 8, steam generator; 9, flip cover mechanism; 10, kneading cylinder mechanism; 11, mixing mechanism; 12, fixed frame 1; 13, fixed frame 2; 14, stirring blade; 15, stirring roller 1; 16, extrusion mechanism; 17, stirring roller 2; 18, fixed side plate 1; 19, fixed side plate 2; 20, kneading chamber 1; 21, kneading chamber 2; 22, extrusion chamber; 23, fan ; 24. Extrusion chamber; 25. Extrusion screw; 26. Insulation cover; 27. V-frame; 28. Electric push rod; 29. ​​Fixed plate; 30. Fixed frame three; 31. Liquid injection port; 32. Exhaust port; 33. Cleaning pipe; 34. Transmission shaft; 35. Driving gear; 36. Arc rack; 37. Arc closing plate; 38. Scraper plate; 39. Closing port; 40. Arc installation port; 41. Steam pipe; 42. Arc avoidance port; 43. Cooling pipe; 44. Kneading cylinder; 45. Cleaning plate; 46. Connecting plate. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0041] like Figure 1-Figure 13As shown, the raw material high-speed kneading machine for rubber ring production comprises a base 4, an external filter box, an external automatic cleaning box, a fan 23 and a steam generator 8. A reducer 1 and a driving motor 2 are fixed on the right side of the upper end of the base 4. The output shaft of the driving motor 2 is connected to the input shaft of the reducer 1 by transmission. A kneading cylinder mechanism 10 is provided on the base 4. A flip cover mechanism 9 is provided on the front side of the kneading cylinder mechanism 10. A closing plate mechanism, a mixing mechanism 11 and an extrusion mechanism 16 are provided inside the kneading cylinder mechanism 10. The mixing mechanism 11 is connected to the input shaft of the reducer 1 by transmission. A water pump 5, a driving motor 3 6 and a multi-way valve 7 are provided on the base 4. The closing plate mechanism is connected to the output shaft of the driving motor 3 6 by transmission. The external water tank, the water pump 5, the multi-way valve 7, the steam generator 8, the kneading cylinder mechanism 10 and the external cooling box are connected by pipelines in sequence. The external cooling box is connected to the external water tank by pipelines. The flip cover mechanism 9, the external filter box and the fan 23 are connected in sequence by pipelines. The external automatic cleaning box is connected to the flip cover mechanism 9 by pipelines.

[0042] In this embodiment, the staff checks and debugs the equipment, replaces the worn parts, the flip cover mechanism 9 moves, and no longer conflicts with the kneading cylinder mechanism 10, the closing plate mechanism moves out and closes, and then the staff injects the raw materials of the rubber ring into the kneading cylinder mechanism 10 in proportion. After the injection, the flip cover mechanism 9 moves and conflicts with the kneading cylinder mechanism 10 again, the output shaft of the driving motor 2 drives the movement of the reducer 1, and the output shaft of the reducer 1 drives the mixing mechanism 11 to move, and the mixing mechanism 11 moves in the kneading cylinder mechanism 10, quickly kneading the rubber ring raw materials to form kneading glue, and the kneading is completed. Then the closing plate mechanism moves to retract and open, the kneading cylinder mechanism 10 cleans the residual material on the closing plate mechanism, and the kneading glue falls into the extrusion mechanism 16, and is extruded by the extrusion mechanism 16 to form a mixed glue; During kneading, the water pump 5 pumps the water in the external water tank into the steam generator 8 through the multi-way valve 7. After the steam is generated by the steam generator 8, it is transported to the kneading cylinder mechanism 10 to heat the kneading cylinder mechanism 10 and increase the temperature during kneading. The heated steam is transported to the external cooling box, cooled by the external cooling box and then transported to the external water tank. The kneading temperature is monitored in real time. When the temperature is too high, the water pump 5 is controlled to pump the water in the external water tank into the kneading cylinder mechanism 10 through the multi-way valve 7 to cool the kneading cylinder mechanism 10 and reduce the temperature during kneading. The temperature is adjusted in real time. During kneading, the fan 23 is started to draw the kneading waste gas in the kneading cylinder mechanism 10 into the external filter box, and then enter the fan 23 after being filtered by the external filter box, and then be discharged through the fan 23; After kneading and extrusion are completed, cleaning is carried out. The external automatic cleaning box sprays the cleaning liquid into the kneading cylinder mechanism 10 through the flip cover mechanism 9 to clean the kneading cylinder mechanism 10, the mixing mechanism 11 and the extrusion mechanism 16. At the same time, the kneading cylinder mechanism 10 is cooled down to facilitate the next kneading. The cleaning waste liquid is discharged through the extrusion mechanism 16 and collected by the staff.

[0043] A fixing frame 12 and two fixing frames 2 13 are provided on the base 4 . The two fixing frames 2 13 are respectively located at the middle part of the upper end and the right side of the upper end of the base 4 .

[0044] In this embodiment, the fixing frame 12 is used to install the driving motor 2 and the reducer 1, and the two fixing frames 2 13 are used to install the kneading cylinder mechanism 10.

[0045] The kneading cylinder mechanism 10 includes a fixed side plate 18 and a fixed side plate 2 19, which are respectively detachably arranged on two fixed frames 2 13, and a kneading cylinder body 44 is fixed between the fixed side plate 18 and the fixed side plate 2 19. The kneading cylinder body 44 is composed of an inner wall body and an outer wall body. The outer wall body of the kneading cylinder body 44 is U-shaped, and a plurality of connecting plates 46, a plurality of cooling pipes 43, a plurality of temperature sensors and a plurality of steam pipes 41 are arranged between the inner wall body and the outer wall body of the kneading cylinder body 44. The cooling pipes 43 and the steam pipes 41 are arranged alternately, and the water inlets of the plurality of cooling pipes 43 are connected to the water outlets of the external water tank through pipes, and the water outlets of the plurality of cooling pipes 43 are connected to the external cooling box through pipes, and the air outlet of the steam generator 8 is connected to the steam generator 8. The air inlets of several steam pipes 41 are connected by high-temperature resistant air pipes, and the air outlets of several steam pipes 41 are connected to the air inlet of the external cooling box by pipes. The kneading cylinder 44 is provided with a kneading chamber 20, an extrusion chamber 22 and a kneading chamber 21 from back to front. The bottom of the extrusion chamber 22 is provided with a closing port 39 and an arc-shaped mounting port 40. The arc-shaped mounting port 40 is located on the outside of the closing port 39, and the closing port 39 is connected to the arc-shaped mounting port 40. The bottom of the extrusion chamber 22 is provided with several sliding grooves and several arc-shaped avoidance ports 42. The arc-shaped avoidance ports 42 are connected to the sliding grooves at corresponding positions. A cleaning plate 45 is detachably provided at the upper end of the front side of the kneading chamber 20. A scraper plate 38 is fixed to the end of the cleaning plate 45. The scraper plate 38 is made of chlorosulfonated polyethylene rubber.

[0046] In this embodiment, the staff checks the kneading cylinder 44 and the cleaning plate 45. During kneading, the water pump 5 pumps the water in the external water tank into the steam generator 8 through the multi-way valve 7. After the steam is generated by the steam generator 8, it is transported to the air inlet of the plurality of steam pipes 41 to heat the kneading cylinder 44, thereby increasing the temperature during kneading. The kneading cylinder 44 is then transported from the air outlet of the plurality of steam pipes 41 to the external cooling box, and then transported to the external water tank after being cooled by the external cooling box. A plurality of temperature sensors monitor the temperature during kneading in real time. When the temperature is too high, the water pump 5 is controlled to pump the water in the external water tank into the plurality of cooling pipes 43 through the multi-way valve 7, and the kneading cylinder 44 is cooled through the plurality of cooling pipes 43 to reduce the temperature during kneading, thereby adjusting in real time. The fixed side plate 18 and the fixed side plate 2 19 are used to fix and seal the kneading cylinder 44, and the kneading roller 15 and the kneading roller 2 17 are installed at the same time. A plurality of connecting plates 46 are used to fix the inner wall and the outer wall of the kneading cylinder 44. The kneading chamber 1 20 and the extrusion chamber 22 are used for kneading. The extrusion chamber 22 is used to extrude the kneading glue. The closing mouth 39, a plurality of sliding grooves and a plurality of arc-shaped avoidance mouths 42 are used for the movement of the closing plate mechanism. The arc-shaped installation mouth 40 installs the closing plate mechanism. The cleaning plate 45 is easy to replace. The scraper plate 38 is used to clean the residual material on the outside of the closing plate mechanism.

[0047] The mixing mechanism 11 includes a kneading roller 15 and a kneading roller 17. The two ends of the kneading roller 15 and the two ends of the kneading roller 17 are respectively rotatably arranged on a fixed side plate 18 and a fixed side plate 19 at corresponding positions. The kneading roller 15 and the kneading roller 17 are connected by a gear pair. The end of the kneading roller 17 is fixedly connected to the output shaft of the reducer 1. The kneading roller 15 and the kneading roller 17 are both provided with a plurality of stirring blades 14, and the plurality of stirring blades 14 are in contact with a kneading chamber 1 20 and a kneading chamber 2 21 at corresponding positions.

[0048] In this embodiment, the output shaft of the driving motor 1 2 drives the reducer 1 to move, the output shaft of the reducer 1 drives the kneading roller 2 17 to rotate, the kneading roller 2 17 drives the kneading roller 1 15 to rotate, and at the same time drives the several stirring blades 14 at the corresponding positions to rotate, the several stirring blades 14 of the kneading roller 1 15 cooperate with the several stirring blades 14 of the kneading roller 2 17 to quickly knead the rubber ring raw materials to form kneaded rubber.

[0049] The extrusion mechanism 16 includes a drive motor 23, an extrusion chamber 24 and an extrusion screw 25. The extrusion chamber 24 is fixed on the right end face of the fixed side plate 18, and the extrusion chamber 24 is connected to the inside of the kneading cylinder 44. The extrusion screw 25 is rotatably set on the fixed side plate 19, and the extrusion screw 25 is in contact with the extrusion cavity 22. The output shaft of the drive motor 23 is transmission-connected to the left end of the extrusion screw 25, and the right end of the extrusion screw 25 extends into the interior of the extrusion chamber 24.

[0050] In this embodiment, the output shaft of the driving motor 23 drives the extrusion screw 25 to rotate in the extrusion chamber. The rotation of the extrusion screw 25 transports the kneaded glue falling in the extrusion chamber 22 to the extrusion chamber 24, and the mixed glue is extruded after the last kneading in the extrusion chamber 24 to form a mixed glue.

[0051] The flip cover mechanism 9 includes a fixed plate 29, a fixed frame 30, a cleaning pipe 33 and a heat-insulating cover plate 26. The fixed plate 29 and the fixed frame 30 are fixedly arranged on the base 4, and the fixed plate 29 is located at the rear side of the fixed frame 30. A heat-insulating ring is arranged on the lower end surface of the heat-insulating cover plate 26. The heat-insulating cover plate 26 abuts against the upper end surface of the kneading cylinder 44. A V-shaped frame 27, an air outlet 32 ​​and a liquid injection port 31 are arranged on the heat-insulating cover plate 26. One end of the V-shaped frame 27 is fixed to the rear side of the upper end of the heat-insulating cover plate 26. The V-shaped frame 27 is hinged to the fixed frame 30. The upper end of the V-shaped frame 27 is hinged with an electric push rod 28 between the other end of the V-shaped frame 27 and the fixed plate 29. The air exhaust port 32 is connected to the external filter box through a pipeline. The liquid inlet of the cleaning pipe 33 is detachably arranged in the liquid injection port 31. The end of the cleaning pipe 33 is fixed to the lower end surface of the insulation cover plate 26. The cleaning pipe 33 is located directly above the extrusion screw 25, and the axis of the cleaning pipe 33 is parallel to the axis of the extrusion screw 25. The cleaning pipe 33 is provided with a plurality of inclined nozzles, and the liquid injection port 31 is connected to the external automatic cleaning box through a pipeline.

[0052] In this embodiment, when adding materials, the telescopic end of the electric push rod 28 contracts to drive the V-shaped frame 27 to move, and the V-shaped frame 27 drives the heat insulation cover plate 26 to move, so that the heat insulation cover plate 26 leaves the upper end surface of the kneading cylinder 44, and the staff adds various rubber ring materials; During kneading, the telescopic end of the electric push rod 28 extends to drive the V-shaped frame 27 to move, and the V-shaped frame 27 drives the heat insulation cover plate 26 to move, so that the heat insulation cover plate 26 abuts against the heat insulation ring for heat insulation, thereby reducing heat loss; During kneading, the fan 23 is started, so that the kneading waste gas in the kneading cylinder 44 enters the external filter box through the air suction port 32, enters the air inlet of the fan 23 after being filtered by the external filter box, and is then discharged from the air outlet of the fan 23; After kneading, the external automatic cleaning box injects the cleaning liquid into the cleaning pipe 33 through the liquid injection port 31, and sprays the cleaning liquid to the front and rear sides of the kneading cylinder 44 through several inclined nozzles on the cleaning pipe 33, and cools the kneading cylinder 44 at the same time, which is convenient for the next kneading. During cleaning, the output shaft of the driving motor 2 drives the reducer 1 to move, and the output shaft of the reducer 1 drives the kneading roller 2 17 to rotate, and the kneading roller 2 17 drives the kneading roller 1 15 to rotate, and drives several stirring blades 14 at corresponding positions to rotate, respectively cleaning the residual waste in the kneading chamber 1 20 and the kneading chamber 2 21, and conveying the cleaning waste liquid to the extrusion chamber 22 to clean the extrusion screw 25, and the output shaft of the driving motor 2 3 drives the extrusion screw 25 to rotate, and conveys the cleaning waste liquid to the extrusion chamber 24, and is discharged through the extrusion chamber 24 and collected by the staff. The fixed frame 30 provides support to facilitate the opening and closing of the insulation cover 26.

[0053] The closing plate mechanism includes an arc-shaped closing plate 37 and a transmission shaft 34. The arc-shaped closing plate 37 is slidably set inside the closing mouth 39. A plurality of arc-shaped racks 36 are provided on the outer side of the arc-shaped closing plate 37. The plurality of arc-shaped racks 36 are slidably set in the sliding grooves at corresponding positions. The length of the sliding groove is equal to twice the length of the arc-shaped racks 36. The transmission shaft 34 is rotatably set at the bottom of the connecting plate 46. The end of the transmission shaft 34 is transmission-connected to the output shaft of the driving motor three 6. A plurality of driving gears 35 are fixed on the transmission shaft 34. The plurality of driving gears 35 are set in the arc-shaped avoidance mouth 42 at corresponding positions. The plurality of driving gears 35 are meshed with the arc-shaped racks 36 at corresponding positions.

[0054] In this embodiment, during injection and kneading, the output shaft of the driving motor 36 drives the transmission shaft 34 to rotate, and the transmission shaft 34 drives a number of driving gears 35 to move in the arc-shaped avoidance opening 42 at the corresponding position, and the number of driving gears 35 drives the arc-shaped racks 36 at the corresponding position to move, and the number of arc-shaped racks 36 move along the sliding grooves at the corresponding positions, thereby driving the arc-shaped closing plate 37 to slide in the closing opening 39, so that the arc-shaped closing plate 37 extends out and contacts the front end of the extrusion cavity 22, so as to prevent the rubber ring raw material and the kneading rubber from falling into the extrusion cavity 22, resulting in insufficient kneading of the rubber ring raw material; When extruding the kneaded glue, the output shaft of the drive motor 36 drives the transmission shaft 34 to rotate, and the transmission shaft 34 drives a number of drive gears 35 to move in the arc-shaped avoidance opening 42 at the corresponding position, and a number of drive gears 35 drive the arc-shaped racks 36 at the corresponding position to move, and a number of arc-shaped racks 36 move along the sliding grooves at the corresponding positions, thereby driving the arc-shaped closing plate 37 to slide in the closing opening 39, so that the arc-shaped closing plate 37 is retracted and flush with the rear end face of the extrusion cavity 22. When retracting, the scraper plate 38 at the end of the cleaning plate 45 contacts the outer arc surface of the arc-shaped closing plate 37 to scrape off the residual material on the outer side of the arc-shaped closing plate 37.

[0055] The working principle of the present invention is as follows: the staff checks and debugs the equipment, replaces the worn parts, the cover mechanism 9 moves, and no longer conflicts with the kneading cylinder mechanism 10, that is, the telescopic end of the electric push rod 28 contracts to drive the V-frame 27 to move, and the V-frame 27 drives the heat insulation cover plate 26 to move, so that the heat insulation cover plate 26 leaves the upper end surface of the kneading cylinder body 44, and the closing plate mechanism moves out to close, that is, the output shaft of the driving motor 36 drives the transmission shaft 34 to rotate, and the transmission shaft 34 drives a plurality of driving gears 35 to move in the arc-shaped avoidance opening 42 at the corresponding position, and a plurality of driving gears 35 drive the arc-shaped racks 36 at the corresponding position to move, and a plurality of arc-shaped racks 36 move along the sliding grooves at the corresponding positions, thereby driving the arc-shaped closing plate 37 to slide in the closing opening 39, so that The arc-shaped closing plate 37 extends out and contacts the front end of the extrusion chamber 22 to prevent the rubber ring raw material and the kneading glue from falling into the extrusion chamber 22, resulting in insufficient kneading of the rubber ring raw material. Subsequently, the staff injects the rubber ring raw materials into the kneading cylinder 44 in proportion. After injection, the flip cover mechanism 9 moves, that is, the telescopic end of the electric push rod 28 extends out, driving the V-shaped frame 27 to move, and the V-shaped frame 27 drives the insulation cover plate 26 to move, so that the insulation cover plate 26 contacts the kneading cylinder 44, and the insulation ring is used for heat insulation to reduce heat loss. Subsequently, the output shaft of the driving motor 2 drives the movement of the reducer 1, and the output shaft of the reducer 1 drives the mixing mechanism 11 to move, that is, the output shaft of the driving motor 2 drives the reducer 1 to move, and the output shaft of the reducer 1 drives the kneading roller The second 17 rotates, the kneading roller second 17 drives the kneading roller one 15 to rotate, and at the same time drives the several stirring blades 14 at the corresponding position to rotate, the mixing mechanism 11 moves in the kneading cylinder mechanism 10, that is, the kneading roller one 15 moves in the kneading chamber one 20, the kneading roller two 17 moves in the kneading chamber two 21, the several stirring blades 14 of the kneading roller one 15 cooperate with the several stirring blades 14 of the kneading roller two 17 to quickly knead the rubber ring raw materials to form kneaded glue, and the kneading is completed, and then the closing plate mechanism moves to be retracted and opened, and the kneading cylinder mechanism 10 cleans the residual material on the closing plate mechanism, that is, the output shaft of the driving motor three 6 drives the transmission shaft 34 to rotate, and the transmission shaft 34 drives the several driving gears 35 to move in the arc-shaped avoidance opening 42 at the corresponding position, and the several driving gears 35 The gear 35 drives the arc-shaped rack 36 at the corresponding position to move, and a plurality of arc-shaped racks 36 move along the sliding grooves at the corresponding positions, thereby driving the arc-shaped closing plate 37 to slide in the closing opening 39, so that the arc-shaped closing plate 37 is retracted and flush with the rear end surface of the extrusion chamber 22. When retracted, the scraper plate 38 at the end of the cleaning plate 45 contacts the outer arc surface of the arc-shaped closing plate 37, scrapes off the residual material on the outer side of the arc-shaped closing plate 37, and the kneaded glue falls into the extrusion chamber 22 and is extruded through the extrusion mechanism 16, that is, the output shaft of the driving motor 23 drives the extrusion screw 25 to rotate in the extrusion chamber, and the extrusion screw 25 rotates to transport the kneaded glue falling in the extrusion chamber 22 to the extrusion chamber 24, and is extruded after the last kneading in the extrusion chamber 24 to form a mixed glue; During kneading, the water pump 5 pumps the water in the external water tank into the steam generator 8 through the multi-way valve 7, and after the steam generator 8 generates steam, the steam is transported to the air inlets of the steam pipes 41 to heat the kneading cylinder 44, thereby increasing the temperature during kneading, and then transported from the air outlets of the steam pipes 41 to the external cooling box, and then transported to the external water tank after being cooled by the external cooling box. Several temperature sensors monitor the temperature during kneading in real time. When the temperature is too high, the water pump 5 is controlled to pump the water in the external water tank into the cooling pipes 43 through the multi-way valve 7, and the kneading cylinder 44 is cooled through the cooling pipes 43 to reduce the temperature during kneading. During kneading, the fan 23 is started to make the kneading exhaust gas in the kneading cylinder 44 enter the external filter box through the exhaust port 32, enter the air inlet of the fan 23 after being filtered by the external filter box, and then be discharged from the air outlet of the fan 23; After kneading and extrusion are completed, cleaning is carried out. The external automatic cleaning box sprays the cleaning liquid into the kneading cylinder mechanism 10 through the flip cover mechanism 9 to clean the kneading cylinder mechanism 10, the mixing mechanism 11 and the extrusion mechanism 16. At the same time, the kneading cylinder mechanism 10 is cooled down to facilitate the next kneading. The cleaning waste liquid is discharged through the extrusion mechanism 16 and collected by the staff.

[0056] In summary, the cover mechanism 9 is automatically opened and closed, and cooperates with the kneading cylinder mechanism 10 to seal and insulate, reduce heat loss, and save energy and protect the environment. By closing the closing plate mechanism, the rubber ring raw material and the kneading rubber are prevented from falling into the extrusion cavity 22 during the feeding and kneading, so as to ensure that the rubber ring raw material is fully kneaded; The kneading cylinder mechanism 10 cooperates with the mixing mechanism 11 to quickly mix, and cooperates with the closing plate mechanism to fully and efficiently knead. At the same time, when the closing plate mechanism is retracted, the cleaning plate 45 and the scraper plate 38 on the kneading cylinder mechanism 10 cooperate to scrape the outer arc surface of the closing plate mechanism to ensure that the outer arc surface is clean and does not affect the next kneading work. The kneading temperature is adjusted in real time through the cooperation of the external water tank, the multi-way valve 7, the steam generator 8, the kneading cylinder mechanism 10, the external cooling box and the water pump 5 to ensure the best kneading effect of the rubber rings of different raw materials; The kneaded rubber is further kneaded to form a mixed rubber and extruded by the extrusion mechanism 16, thereby achieving automatic extrusion; The external automatic cleaning box cooperates with the flip cover mechanism 9, the kneading cylinder mechanism 10, the mixing mechanism 11 and the extrusion mechanism 16 to automatically clean and cool the kneading cylinder mechanism 10 to facilitate the next kneading.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A high-speed kneading machine for raw materials used in rubber ring production, comprising a base (4), an external filter box, an external automatic cleaning box, a fan (23) and a steam generator (8), characterized in that: A reducer (1) and a drive motor (2) are fixed to the right side of the upper end of the base (4); the output shaft of the drive motor (2) is drivingly connected to the input shaft of the reducer (1); a kneading cylinder mechanism (10) is provided on the base (4); a flip cover mechanism (9) is provided on the front side of the kneading cylinder mechanism (10); a closing plate mechanism, a mixing mechanism (11) and an extrusion mechanism (16) are provided inside the kneading cylinder mechanism (10); the mixing mechanism (11) is drivingly connected to the input shaft of the reducer (1); a water pump is provided on the base (4); The pump (5), the drive motor three (6) and the multi-way valve (7), the closing plate mechanism and the output shaft of the drive motor three (6) are connected in a transmission manner, the external water tank, the water pump (5), the multi-way valve (7), the steam generator (8), the kneading cylinder mechanism (10) and the external cooling box are connected in sequence through pipelines, the external cooling box and the external water tank are connected through pipelines, the flap mechanism (9), the external filter box and the fan (23) are connected in sequence through pipelines, and the external automatic cleaning box and the flap mechanism (9) are connected through pipelines.

2. The high-speed kneading machine for raw materials used in rubber ring production according to claim 1, characterized in that: The base (4) is provided with a fixing frame 1 (12) and two fixing frames 2 (13), and the two fixing frames 2 (13) are respectively located at the middle part and the right side of the upper end of the base (4).

3. The high-speed kneading machine for raw materials for rubber ring production according to claim 2, characterized in that: The kneading cylinder mechanism (10) comprises a fixed side plate 1 (18) and a fixed side plate 2 (19), the fixed side plate 1 (18) and the fixed side plate 2 (19) being detachably arranged on two fixed frames 2 (13), a kneading cylinder body (44) being fixed between the fixed side plate 1 (18) and the fixed side plate 2 (19), the kneading cylinder body (44) being composed of an inner wall body and an outer wall body, the outer wall body of the kneading cylinder body (44) being U-shaped, a plurality of connecting plates (46), a plurality of cooling pipes (43), a plurality of temperature sensors and a plurality of steam pipes (41) being arranged between the inner wall body and the outer wall body of the kneading cylinder body (44), the cooling pipes (43) and the steam pipes (41) being arranged alternately, the water inlets of the plurality of cooling pipes (43) being connected to the water outlets of an external water tank via pipes, the water outlets of the plurality of cooling pipes (43) being connected to the external cooling tank via pipes, the air outlets of the steam generator (8) being connected to the plurality of The air inlets of the dry steam pipeline (41) are connected by a high temperature resistant air pipe, and the air outlets of the plurality of steam pipelines (41) are connected to the air inlet of the external cooling box by a pipe. The kneading cylinder (44) is provided with a kneading chamber (20), an extrusion chamber (22) and a kneading chamber (21) in sequence from the back to the front. The bottom of the extrusion chamber (22) is provided with a closing opening (39) and an arc-shaped mounting opening (40). The arc-shaped mounting opening (40) is located outside the closing opening (39), and the closing opening (39) is communicated with the arc-shaped mounting opening (40). The bottom of the extrusion chamber (22) is provided with a plurality of sliding grooves and a plurality of arc-shaped avoidance openings (42). The arc-shaped avoidance openings (42) are communicated with the sliding grooves at corresponding positions. A cleaning plate (45) is detachably provided at the upper end of the front side of the kneading chamber (20). A scraper plate (38) is fixed to the end of the cleaning plate (45). The scraper plate (38) is made of chlorosulfonated polyethylene rubber.

4. The high-speed kneading machine for raw materials for rubber ring production according to claim 3, characterized in that: The mixing mechanism (11) comprises a kneading roller 1 (15) and a kneading roller 2 (17). The two ends of the kneading roller 1 (15) and the two ends of the kneading roller 2 (17) are rotatably arranged on a fixed side plate 1 (18) and a fixed side plate 2 (19) at corresponding positions respectively. The kneading roller 1 (15) and the kneading roller 2 (17) are connected to each other through a gear pair. The end of the kneading roller 2 (17) is fixedly connected to the output shaft of the reducer (1). The kneading roller 1 (15) and the kneading roller 2 (17) are both provided with a plurality of stirring blades (14). The plurality of stirring blades (14) are in contact with a kneading chamber 1 (20) and a kneading chamber 2 (21) at corresponding positions.

5. The high-speed kneading machine for raw materials for rubber ring production according to claim 4, characterized in that: The extrusion mechanism (16) comprises a second drive motor (3), an extrusion chamber (24) and an extrusion screw (25). The extrusion chamber (24) is fixed on the right end face of the first fixed side plate (18), and the extrusion chamber (24) is connected to the inside of the kneading cylinder (44). The extrusion screw (25) is rotatably arranged on the second fixed side plate (19). The extrusion screw (25) contacts the extrusion chamber (22). The output shaft of the second drive motor (3) is transmission-connected to the left end of the extrusion screw (25), and the right end of the extrusion screw (25) extends into the inside of the extrusion chamber (24).

6. The high-speed kneading machine for raw materials for rubber ring production according to claim 5, characterized in that: The flip cover mechanism (9) comprises a fixed plate (29), a fixed frame three (30), a cleaning pipe (33) and a heat-insulating cover plate (26); the fixed plate (29) and the fixed frame three (30) are fixedly arranged on the base (4), and the fixed plate (29) is located at the rear side of the fixed frame three (30); a heat-insulating ring is provided on the lower end surface of the heat-insulating cover plate (26); the heat-insulating cover plate (26) abuts against the upper end surface of the kneading cylinder (44); a V-shaped frame (27), an air outlet (32) and a liquid injection port (31) are provided on the heat-insulating cover plate (26); one end of the V-shaped frame (27) is fixed to the rear side of the upper end of the heat-insulating cover plate (26); the V-shaped frame (27) is hinged at An electric push rod (28) is hingedly connected between the upper end of the fixing frame 3 (30), the other end of the V-shaped frame (27) and the fixing plate (29), the air exhaust port (32) and the external filter box are connected via a pipeline, the liquid inlet of the cleaning pipe (33) is detachably arranged in the liquid injection port (31), the end of the cleaning pipe (33) is fixed to the lower end surface of the heat insulation cover plate (26), the cleaning pipe (33) is located directly above the extrusion screw (25), and the axis of the cleaning pipe (33) is parallel to the axis of the extrusion screw (25), and a plurality of inclined nozzles are provided on the cleaning pipe (33), and the liquid injection port (31) and the external automatic cleaning box are connected via a pipeline.

7. A high-speed kneading machine for raw materials for rubber ring production according to claim 6, characterized in that: The closing plate mechanism comprises an arc-shaped closing plate (37) and a transmission shaft (34); the arc-shaped closing plate (37) is slidably arranged inside the closing opening (39); a plurality of arc-shaped racks (36) are arranged on the outer side of the arc-shaped closing plate (37); the plurality of arc-shaped racks (36) are slidably arranged in sliding grooves at corresponding positions; twice the length of the arc-shaped racks (36) is equal to the length of the sliding groove; the transmission shaft (34) is rotatably arranged at the bottom of the connecting plate (46); the end of the transmission shaft (34) is transmission-connected to the output shaft of the driving motor three (6); a plurality of driving gears (35) are fixed on the transmission shaft (34); the plurality of driving gears (35) are arranged in the arc-shaped avoidance opening (42) at corresponding positions; and the plurality of driving gears (35) are meshed with the arc-shaped racks (36) at corresponding positions.

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