Extrusion crosslinking apparatus for self-sealing rubber

Abstract

The application discloses a kind of extrusion crosslinking equipment for self-sealing rubber, belong to self-sealing rubber processing technical field.The equipment includes extrusion system, screw sealing device, transition body connecting seat, transmission device, machine cylinder support, base, heating and heat preservation device, screw temperature control pipeline, damper and discharge template.Extrusion system is connected with transmission device by screw sealing device, transition body connecting seat, and is fixed on base by machine cylinder support;Damper and discharge template are sequentially connected in the tail of extrusion system, and heating and heat preservation device and screw temperature control pipeline provide the heat source required for rubber molten material state of extrusion system.The present application designs new screw structure to realize the four-stage extrusion of material, with the effect of high shear, high uniformity mixing.The extrusion crosslinking equipment based on the physical properties of self-sealing rubber has the characteristics of compact structure, easy installation and operation, and high transmission precision.

Description

Technical Field

[0001] The invention belongs to the technical field of self-sealing rubber processing, and in particular relates to extrusion cross-linking equipment for self-sealing rubber. Background Art

[0002] With the rise of the automobile industry and the increasing demand for tires, self-sealing tires with good self-sealing properties have received widespread attention. However, they have not been promoted and applied due to their complex processes and difficulties in manufacturing.

[0003] At present, the common rubber extrusion equipment on the market is relatively simple and cannot meet the special needs of self-sealing rubber tires. Therefore, the new process and equipment developed based on self-sealing rubber materials are in line with the development of the tire industry and fill the domestic gap, which is of great significance. Summary of the Invention

[0004] The object of the present invention is to provide an extrusion cross-linking device for self-sealing rubber which is easy to install and operate and has a compact structure.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] An extrusion cross-linking device for self-sealing rubber includes an extrusion system 1, a screw sealing device 2, a transition body connecting seat 3, a transmission device 4, a barrel support 5, a base 6, a heating and heat preservation device 7, a screw temperature control pipeline 8, a damper 9 and a discharge template 10.

[0007] The transmission device 4 is fixed to the base 6 via a motor pad, and the extrusion system 1 is connected to the transmission device 4 via a transition body connector 3 and a coupling. The extrusion system 1 is also mounted on the base 6 via a barrel support 5. The discharge die plate 10 is connected to the extrusion system 1 via a damper 9. The screw sealing device 2, the heating and heat preservation device 7, and the screw temperature control pipeline 8 are all connected inside the extrusion system 1.

[0008] Preferably, the extrusion system 1 includes a screw 14, a feeding barrel 11, a barrel A12, a barrel B13, a barrel connecting device 15 and a heater 16 to realize the feeding, melting, shearing, mixing and discharging of rubber. Among them, barrel A12 and barrel B13 are both installed on the outside of the screw 14 and are connected together by the barrel connecting device 15. The feeding barrel 11 is connected to the head end of the barrel A12 and is connected to the transmission device 4 through the transition body connecting seat 3. The heater 16 is connected to the tail end of the barrel B13 to ensure the melting temperature requirement of the material discharged from the tail end of the screw. The screw 14 can sequentially complete the four-stage extrusion process of feeding, compression, melting and homogenization. The feeding section uses a deeper screw groove depth to balance the feed amount and the strength requirements of the screw root. The compression section uses a gradually changing screw groove depth to meet the compression requirements. The melting section and the homogenization section use a shallower screw groove depth coupled with a pin structure to complete the efficient shearing and plasticizing process of the material. The hollow structure inside the screw 14 is connected to the screw temperature control pipeline 8. By heating the core of the screw 14 to a high temperature, the temperature requirement of the material contact surface of the screw 14 is guaranteed, thereby accelerating the conversion process of the rubber melt state.

[0009] Preferably, the transmission device 4 is composed of a coupling, a variable frequency motor and a reducer, providing sufficient and adjustable power for the extrusion system 1.

[0010] Preferably, the base 6 is composed of a base frame 17, a guide rail 18, a guide wheel 19, a driven wheel 20, a drive device 21, a bumper 22, and a sensor shield 23. The base frame 17 is connected to the guide rail 18 via the guide wheel 19 and the driven wheel 20. The drive device 21 fixed to the base frame 17 drives the guide wheel 19 along the guide rail via a variable frequency motor and chain drive. The bumper 22 and the sensor shield 23 are used to adjust the position of the monitoring base, ultimately achieving directional movement of the base frame 17 to meet installation, production, and process adjustment requirements.

[0011] Preferably, the heating and heat-insulating device 7 primarily comprises multiple heating and heat-insulating covers, heaters, and fans. The heaters and fans are connected to barrels A12 and B13 to provide heat for melting the materials within the barrels. The heating and heat-insulating covers, primarily made of insulating material, are placed outside the heaters to prevent heat from escaping and being consumed.

[0012] Preferably, the screw temperature control circuit 8 is primarily composed of a conduit, a high-temperature oil pipe, a rotary joint, and an insulation pipe. The conduit is connected to the end face of the screw core shaft, while the insulation pipe, rotary joint, and high-temperature oil pipe are sequentially fixed to the end face of the screw core shaft. The temperature of the core of the screw 14 is controlled by the oil temperature at the inlet and outlet of the high-temperature oil pipe.

[0013] The damper 9 preferably comprises a loading door 24, a discharge door 25, a reducer 26, a thrust plate 27, a composite bearing 28, a lead screw 29, a gland 30, a fixed support plate 31, a nut 32, a pointer device 33, a guide rod 34, a discharge door support plate 35, an adjustment screw 36, and a stop block 37. The discharge door 25 is connected to the discharge door support plate 35 on both sides by screws. The tops of the two discharge door support plates 35 are each screwed to a guide rod 34, and the tops of the two guide rods 34 are connected by a flange; the flanges are fixed to the nut 32. The loading door 24 is located above the discharge door 25, and the top of the loading door 24 is fixedly connected to another nut. The lead screw 29 is a forward and reverse threaded lead screw, one end of which passes through a hole in the top of the loading door 24 and is threadedly connected to the nut. The middle of the lead screw 29 is sequentially connected to the nut 32 and the composite bearing 28. The other end of the lead screw 29 is connected to the reducer 26. The fixed support plate 31 is mounted outside the unloading door support plate 35 and guide rod 34. Its bottom is fixed to the limit block 37 via screws. A plurality of adjustment screws 36 are provided on the fixed support plate 31, which are used to adjust and fix the position of the unloading door support plate 35. The thrust plate 27 and the pressure cover 30 are connected to the composite bearing 28 to form the power transmission. The pointer device 33 is connected to the guide rod 34. The handwheel input torque drives the screw 29 to rotate through the reducer 26 and the composite bearing 28. The screw 29 drives the two nuts to move in opposite directions through the reverse thread structure, thereby driving the loading door 24 and the unloading door 25 to move in opposite directions, and the clamping capacity of the material door is used to meet the pressure demand of the discharge; the pressure cover 30, the fixed support plate 31 and the nut 32 are used to fix and cooperate with the operation of the damper, the pointer device 33 is used to display the displacement distance of the material door, and the guide rod 34 and the unloading door support plate 35 are used to adjust the position of the unloading door 25; the adjustment screw 36 participates in the position adjustment pre-tightening effect of the unloading door support plate 35.

[0014] Preferably, the discharge template 10 is mainly composed of a connector 38, a connecting sleeve a39, a manifold 40, a slide 41, a distance sleeve 42, a fixed plate 43, a connecting elbow 44, a connecting sleeve b45, a pressure sensor 46, a handle 47, and a heater 48. The connector 38 is connected to the manifold 40 via the connecting sleeve a39, with bolts passing through the fixing plate 43 and the distance sleeve 42 to connect the two on both sides of the manifold. The fixing plate 43 is also connected to the connecting sleeve b45, in which a connecting elbow 44 is installed, connecting the connecting elbow 44 to the outlet of the manifold 40. The slide 41 is a fan-shaped structure, which is mounted on the outer periphery of the distance sleeve 42 near the center, and one side of the slide is provided with a through hole that is compatible with the outlet of the manifold 40. The handle 47 is connected to the slide 41, and by turning the handle 47, the slide 41 is driven to rotate around the distance sleeve 42 to connect or disconnect the outlets on both sides of the manifold 40, thereby adjusting the flow of materials in the connecting elbows 44 on both sides. The pressure sensor 46 is inserted into the connector 38 to detect the extrusion pressure of the melt; the heater 48 is fixed at the connecting elbow 44 to provide heat for the material to be melted and discharged, thereby ensuring the ambient temperature requirement of the melt.

[0015] The heater 16, the fixed support plate 31 and the connector 38 are connected in sequence by 8 bolts. The molten material at the tail of the screw 14 is transported to the connector 38 through the upper and lower material doors of the damper 9, and then enters the diverter 40 through the connector 38 and the connecting sleeve a39. It is diverted to the connecting elbow 44 through the diverter 40 and flows out. The handle 47 is turned to drive the slide 41 to rotate around the fixed distance sleeve 42 to adjust the flow conditions of the flow channels on both sides of the discharge template and realize the alternating discharge process requirements.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) This invention designs a novel extrusion and cross-linking equipment for self-sealing rubber, suitable for self-sealing tires. The rubber material is drawn into the barrel by a gear pump, sheared by a screw, and conveyed to the tail of the screw. A damper and a discharge plate then discharge the material at multiple outlets at a constant pressure. Heat required for the molten material is generated by a specially designed heating and insulation device and screw temperature control piping, ultimately achieving the extrusion and cross-linking requirements of the self-sealing rubber.

[0018] 2) The screw's double-flight, pin-shaped structure enhances feeding and homogenizing shearing to complete the four extrusion stages of rubber: feeding, compression, melting, and homogenization. The heatable hollow main shaft accelerates the transition between the molten rubber and the final state. The base is driven by a drive mechanism and moves along guide rails, meeting installation, production, and process adjustment requirements. The damper adjusts the position of the upper and lower feed ports through a combination of a handwheel, lead screw, and nut, meeting the requirement for adjustable molten material extrusion pressure. The discharge template adjusts the alternating process requirements of the molten material through a combination of a handle, connector, manifold, and connecting elbow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the extrusion cross-linking equipment for the self-sealing rubber of the present invention.

[0020] Figure 2 Schematic diagram of the extrusion system of the present invention.

[0021] Figure 3 Schematic diagram of the base of the present invention.

[0022] Figure 4 Schematic diagram of the damper of the present invention.

[0023] Figure 5 It is a schematic diagram of the discharge template of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the skateboard of the present invention.

[0025] Among them: 1 extrusion system; 2 screw sealing device; 3 transition body connecting seat; 4 transmission device; 5 barrel support; 6 base; 7 heating and heat preservation device; 8 screw temperature control pipeline; 9 damper; 10 discharge template; 11 feeding barrel; 12 barrel A; 13 barrel B; 14 screw; 15 barrel connecting device; 16 heater; 17 base frame; 18 guide rail; 19 guide wheel; 20 driven wheel; 21 driving device; 22 collision block; 23 sensor protective cover; 2 4 Loading door; 25 Unloading door; 26 Reducer; 27 Thrust plate; 28 Composite bearing; 29 Lead screw; 30 Pressure cover; 31 Fixed support plate; 32 Nut; 33 Pointer device; 34 Guide rod; 35 Unloading door support plate; 36 Adjustment screw; 37 Limit block; 38 Connector; 39 Connecting sleeve a; 40 Distributor; 41 Slide plate; 42 Distance sleeve; 43 Fixed plate; 44 Connecting elbow; 45 Connecting sleeve b; 46 Pressure sensor; 47 Handle; 48 Heater. DETAILED DESCRIPTION

[0026] The following examples and drawings further explain the specific embodiments of the present invention, but are not intended to limit the present invention.

[0027] like Figures 1 to 5 As shown, the extrusion cross-linking equipment for self-sealing rubber includes an extrusion system 1, a screw sealing device 2, a transition body connecting seat 3, a transmission device 4, a barrel support 5, a base 6, a heating and insulation device 7, a screw temperature control pipeline 8, a damper 9 and a discharge template 10.

[0028] Among them, the transmission device 4 is fixed to the base 6 through the motor pad, the extrusion system 1 is installed on the base 6 through the barrel support 5, and the extrusion system 1 is connected to the transmission device 4 through the transition body connecting seat 3 and the coupling; the discharge template 10 is connected to the tail of the extrusion system 1 through the damper 9, and the screw sealing device 2, the heating and insulation device 7 and the screw temperature control pipeline 8 are all connected to the extrusion system 1.

[0029] During operation, a gear pump drives the rubber feed into feeding barrel 11. Simultaneously, transmission device 4 supplies motor power to screw 14 via a coupling. The rotational shearing action of screw 14 drives the rubber through barrels A 12, B 13, and the tail outlet of screw 14, and then through damper 9 and discharge die plate 10. During this time, barrel connection device 15 and heater 16 meet their respective sealing and temperature requirements.

[0030] The screw sealing device 2 avoids material leakage from the screw by hard connection and reverse thread sealing.

[0031] The transition body connecting seat 3 is connected to the reducer in the transmission device 4 and the extrusion system 1 to provide them with sufficient connection and closed environmental conditions.

[0032] The transmission device 4 is composed of a variable frequency motor, a coupling and a multi-stage reducer, which provides a sufficient and adjustable power source for the extrusion system 1.

[0033] The barrel support 5 is composed of a support plate, a cover plate and an adjusting bolt. The stable placement of the extrusion system 1 is ensured by adjusting the tightening force of the bolt and the support plate.

[0034] The base 6 serves as a support and limiter for the extrusion system 1 and the transmission device 4 , and can drive the extrusion system 1 to move along the guide rail 18 through the driving device 21 to meet on-site installation and process requirements.

[0035] The heating and heat preservation device 7 provides the extrusion system 1 with appropriate heat for the molten material. The temperature of the extrusion system 1 can be flexibly adjusted through the combination of the heater and the fan to meet the extrusion process requirements of the molten rubber.

[0036] The screw temperature control pipeline 8 achieves the ambient temperature requirement of the screw 14 through oil heating, and can realize the internal temperature control function of the screw core shaft through components such as the conduit, high-temperature oil pipe and rotary joint.

[0037] The damper 9 inputs torque through the handwheel, passes through the reducer 26, thrust plate 27, composite bearing 28 and screw 29, and drives the loading door 24 and the unloading door 25 to move, and the pressure requirement of the discharge is met through the clamping action of the material door.

[0038] The discharge template 10 diverts the molten material entering from the connector 38 to the connecting elbow 44 through the diverter 40 and can realize the dual-outlet rotation discharge function by adjusting the discharge direction by moving the handle 47, thereby realizing flexible adjustment of the production process.

[0039] In addition, although this specification is described in accordance with the implementation method, it does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which are all covered by the protection scope of the present invention.

Claims

1. An extrusion cross-linking equipment for self-sealing rubber, characterized in that: The equipment includes an extrusion system (1), a screw sealing device (2), a transition body connecting seat (3), a transmission device (4), a barrel support (5), a base (6), a heating and heat preservation device (7), a screw temperature control pipeline (8), a damper (9) and a discharge template (10); The transmission device (4) is fixed to the base (6) via a motor pad, the extrusion system (1) is connected to the transmission device (4) via a transition body connecting seat (3) and a coupling, and the extrusion system (1) is also mounted on the base (6) via a barrel support (5); the discharge template (10) is connected to the extrusion system (1) via a damper (9), and the screw sealing device (2), the heating and heat preservation device (7) and the screw temperature control pipeline (8) are all connected inside the extrusion system (1); The screw sealing device (2) avoids the leakage of the screw through hard connection and reverse thread sealing; The damper (9) is composed of a loading door (24), a unloading door (25), a speed reducer (26), a thrust plate (27), a composite bearing (28), a lead screw (29), a pressure cover (30), a fixed support plate (31), a nut (32), a pointer device (33), a guide rod (34), an unloading door support plate (35), an adjustment screw (36) and a limit block (37); wherein both sides of the unloading door (25) are connected to the unloading door support plate (35), and the two unloading door support plates are connected to each other. The top of each plate (35) is connected to a guide rod (34), and the tops of the two guide rods (34) are connected by a flange; the flange is fixed to the nut (32); the loading door (24) is located above the unloading door (25), and the top of the loading door (24) is connected and fixed to another nut; the screw (29) is a positive and negative thread screw, one end of which passes through the hole at the top of the loading door (24) and is connected to the nut by a thread, the middle of the screw (29) is connected in sequence to the nut (32) and the composite bearing (28), the screw (2 9) The other end is connected to the reducer (26); the fixed support plate (31) is installed on the outside of the unloading door support plate (35) and the guide rod (34), and its bottom is connected and fixed to the limit block (37). A plurality of adjustment screws (36) are provided on the fixed support plate (31), and the position of the unloading door support plate (35) is adjusted and fixed by using the adjustment screws (36); the thrust plate (27) and the pressure cover (30) are connected to the composite bearing (28) to form a power transmission; the pointer device (33) is connected to The guide rod (34) is used to display the displacement distance of the material door; the handwheel input torque drives the screw (29) to rotate through the reducer (26) and the composite bearing (28), and the screw (29) drives the two screw nuts to move in the opposite direction through the reverse thread structure, thereby driving the loading door (24) and the unloading door (25) to move in the opposite direction, and the pressure requirement of the discharge is met by the clamping capacity of the material door; the pressure cover (30), the fixed support plate (31) and the screw nut (32) are used to fix and cooperate with the operation of the damper.

2. The extrusion cross-linking equipment for self-sealing rubber according to claim 1, characterized in that: The extrusion system (1) includes a screw (14), a feeding barrel (11), a barrel A (12), a barrel B (13), a barrel connecting device (15) and a heater (16); wherein the barrel A (12) and the barrel B (13) are both installed outside the screw (14) and are connected together through the barrel connecting device (15); the feeding barrel (11) is connected to the head end of the barrel A (12) and is connected to the transmission device (4) through the transition body connecting seat (3); the heater (16) is connected to the tail end of the barrel B (13) to ensure the melting temperature requirement of the material discharged from the tail end of the screw.

3. The extrusion cross-linking equipment for self-sealing rubber according to claim 2, characterized in that: The screw (14) can sequentially complete the four-stage extrusion process of feeding, compression, melting, and homogenization, wherein the feeding section adopts a deeper screw groove depth to balance the feed amount and the strength requirement of the screw root, the compression section adopts a gradual screw groove depth to meet the compression requirement, and the melting section and the homogenization section adopt a shallower screw groove depth coupled with a pin structure to complete the efficient shearing and plasticizing process of the material; the hollow structure inside the screw (14) is connected to the screw temperature control pipeline (8), and the temperature requirement of the material contact surface of the screw (14) is guaranteed by heating the core of the screw (14) to a high temperature, thereby accelerating the rubber melt material state conversion process.

4. The extrusion cross-linking equipment for self-sealing rubber according to claim 3, characterized in that: The discharge template (10) is composed of a connector (38), a connector sleeve a (39), a distributor (40), a slide plate (41), a distance sleeve (42), a fixed plate (43), a connecting elbow (44), a connector sleeve b (45), a pressure sensor (46), a handle (47) and a heater (48); wherein the connector (38) is connected to the distributor (40) through the connector sleeve a (39), and bolts pass through the fixing plate (43) and the distance sleeve (42) in sequence to connect the two on both sides of the distributor; the fixing plate (43) is also connected to the connector sleeve b (45), and a connecting elbow (44) is installed in the connector sleeve b (45), and the connecting elbow (44) is connected to the distributor (40). ) outlet connection; the slide plate (41) is a fan-shaped structure, which is sleeved on the outer periphery of the distance sleeve (42) near the center, and one side of the slide plate is provided with a through hole adapted to the outlet of the flow divider (40); the handle (47) is connected to the slide plate (41), and the slide plate (41) is driven to rotate around the distance sleeve (42) by toggling the handle (47) to realize the conduction or disconnection of the outlets on both sides of the flow divider (40), thereby adjusting the flow of materials at the connecting elbows (44) on both sides; the pressure sensor (46) is inserted into the interior of the connector (38) to detect the extrusion pressure of the melt; the heater (48) is fixed at the connecting elbow (44) to provide heat for the melting and discharging of the material to ensure the ambient temperature requirement of the melt.

5. The extrusion cross-linking equipment for self-sealing rubber according to any one of claims 1 to 4, characterized in that: The base (6) is composed of a base frame (17), a guide rail (18), a guide wheel (19), a driven wheel (20), a driving device (21), a bumper (22) and a sensor protective cover (23); wherein the base frame (17) is connected to the guide rail (18) through the guide wheel (19) and the driven wheel (20); the driving device (21) fixed on the base frame (17) drives the guide wheel (19) to move along the guide rail through a variable frequency motor and a chain transmission; the bumper (22) and the sensor protective cover (23) are used to adjust the position of the monitoring base, and finally realize the directional movement of the position of the base frame (17), meeting the installation production and process adjustment requirements.

6. The extrusion cross-linking equipment for self-sealing rubber according to claim 2 or 3, characterized in that: The heating and heat-insulating device (7) is composed of a plurality of heating and heat-insulating covers, heaters and fans; wherein the heaters and fans are connected to the barrel A (12) and the barrel B (13) to provide heat for the material inside the barrel to melt the material; the heating and heat-insulating cover is made of heat-insulating material and is placed outside the heater to prevent the overflow and consumption of heat.

7. The extrusion cross-linking equipment for self-sealing rubber according to claim 2 or 3, characterized in that: The screw temperature control pipeline (8) comprises a conduit, a high-temperature oil pipe, a rotary joint and a heat-insulating pipe; wherein the conduit is connected to the end face of the screw core shaft, the heat-insulating pipe, the rotary joint and the high-temperature oil pipe are fixed to the end face of the screw core shaft in sequence, and the temperature of the screw core is controlled by the oil temperature at the inlet and outlet of the high-temperature oil pipe.

8. The extrusion cross-linking equipment for self-sealing rubber according to any one of claims 1 to 4, characterized in that: The transmission device (4) includes a coupling, a variable frequency motor and a reducer, and provides sufficient and adjustable power for the extrusion system (1).

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