Extrusion pelletizing device for high-flow elastomer

Abstract

The invention discloses a high-flow elastomer extrusion pelletizing device which comprises an extruder, an underwater pelletizing die head is arranged at the downstream end of the extruder, a pipeline water-cooling conveying device is installed on the downstream of the water-cooling pelletizing die head and comprises a pipeline support, a conveying pipe is arranged on the pipeline support, and the pipeline support is provided with a water inlet and a water outlet. The upstream end of the conveying pipe is fixedly communicated with the end part of a water-cooling pelletizing die head of the extruder, the upstream section of the conveying pipe is provided with a water inlet pipe orifice, the downstream section of the conveying pipe is provided with a water outlet pipe orifice, the water inlet pipe orifice and the water outlet pipe orifice are connected with a water circulating device, and the downstream end of the conveying pipe is provided with a discharge port. A guide conveying device facilitating traction of the elastomer strip is installed at the position, located at the discharging opening, of the pipeline support. A drying device for drying the elastomer strips is arranged at the downstream of the guide conveying device, and a pelletizing device for pelletizing the elastomer strips is arranged at the downstream of the drying device.

Description

Technical Field

[0001] The invention relates to the technical field of plastic elastomer production, in particular to an extrusion and pelletizing device for high-fluidity elastomer. Background Art

[0002] In the production process of plastic particles, the plastic is heated and melted by an extruder and then extruded and pelletized. There are currently two ways of transporting the pelletized material, one is underwater pelletizing and the other is water tank pelletizing. The applicant has previously applied for an underwater pelletizer with the publication number CN116021666A. The underwater pelletizer performs the pelletizing process underwater, and the pelletized material flows out directly with the water flow.

[0003] However, when some high-flow elastomers are produced, the material is heated and melted by the extruder and then extruded from the die head. The current die heads are all metal die heads, which are provided with a lot of holes. When the material is heated and melted in the extruder, the material in direct contact with the extruder die head may be carbonized and blackened due to the high temperature. The blackened and carbonized material will adhere to the discharge hole of the die head and cause the discharge port to be blocked, thereby affecting the extrusion efficiency of the die head, and the die head needs to be removed for cleaning, which is very wasteful of manpower and time and causes downtime. At the same time, the high-flow elastomer has strong fluidity, so when the material passes through the die head of the extruder, it is extruded. The extrusion pressure of the extruder screw on the material is uneven. Due to the strong fluidity of the material, the accumulation of material at the bottom of the die head will be more and more compact than the accumulation of material at the top of the die head. In this way, when the extruder is extruding, the extrusion force on the material of the small hole below the die head will be greater than the extrusion force of the small hole at the top. Therefore, there will be some differences in the extrusion amount and extrusion speed of the material extruded from the die head. The pelletizing tool of the extruder has the same rotation speed when pelletizing. In this way, the pellets cut off will have different lengths and uneven particles due to the difference in extrusion speeds of the upper and lower extrusion holes of the die head. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an extrusion and pelletizing device for high-flow elastomers, which can be water-cooled and transported immediately after extrusion by an extruder to form elastomer strips, and then the cooled elastomer strips can be dried and pelletized conveniently, thus ensuring that the cut particles are more uniform.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an extrusion pelletizing device for high-flow elastomer, comprising an extruder, an underwater pelletizing die head is arranged at the downstream end of the extruder, a pipeline water-cooling conveying device is installed downstream of the water-cooling pelletizing die head, the pipeline water-cooling conveying device comprises a pipeline support, a conveying pipe is arranged on the pipeline support, the upstream end of the conveying pipe is fixedly connected with the end of the water-cooling pelletizing die head of the extruder, an upstream section of the conveying pipe is provided with a water inlet, a downstream section of the conveying pipe is provided with a water outlet, the water inlet and the water outlet are connected to a water circulation device, a discharge port is arranged at the downstream end of the conveying pipe, and a guide conveying device for facilitating the traction of the elastomer strip is installed on the pipeline support at the discharge port;

[0006] A drying device for drying the elastomer strips is arranged downstream of the guide conveying device, and a pelletizing device for pelletizing the elastomer strips is arranged downstream of the drying device.

[0007] As a preferred solution, the guide conveying device includes a conveying frame, on which a lower guide roller is rotatably mounted, and the lower guide roller is provided with a plurality of guide ring grooves, and the guide ring grooves correspond to the positions of the discharge port.

[0008] As a preferred solution, a gantry is provided on the conveying frame, an upper roller frame is installed on the gantry, the upper roller frame is installed on the gantry through a vertical lifting adjustment mechanism, an upper guide roller is rotatably installed on the upper roller frame, the upper guide roller is located above the lower guide roller, and a plurality of guide ring grooves are also provided on the upper guide roller.

[0009] As a preferred solution, the conveying pipe includes an upstream horizontal pipe section, a vertical pipe section and a downstream horizontal pipe section, the upstream horizontal pipe section, the vertical pipe section and the downstream horizontal pipe section are connected in sequence through elbows, the upstream horizontal pipe section is fixedly connected to the end of a water-cooled pelletizing die head, the water inlet pipe port is arranged on the upstream horizontal pipe section and close to the water-cooled pelletizing die head, and the water outlet pipe port is arranged on the vertical pipe section.

[0010] As a preferred solution, the water-cooled pelletizing die includes a die body, a die cavity is arranged on the die body, an electric heating device is arranged outside the die body, a mouth template is detachably fixed to the downstream end of the die body, a plurality of mounting holes are arranged on the mouth template, a ceramic isolation sleeve is installed on the mouth template, a ceramic inner sleeve is embedded in the mounting hole on the ceramic isolation sleeve, the inner hole of the ceramic inner sleeve constitutes an extrusion hole, and the conveying pipe is fixedly connected to the mouth template.

[0011] As a preferred solution, the ceramic isolation sleeve includes an isolation plate portion, the downstream plate surface of the isolation plate portion is provided with the ceramic inner sleeve, and the isolation plate portion is attached to the die plate and pre-pressed between the die body and the die plate.

[0012] As a preferred solution, the mounting hole is a conical mounting hole, and correspondingly, the ceramic inner sleeve is also a conical ceramic inner sleeve.

[0013] As a preferred solution, a ceramic isolation gasket is further provided between the die body and the orifice mold plate. The die body and the orifice mold plate are fixed by bolts and the isolation gasket is pressed and fixed, and the isolation gasket presses the isolation plate portion.

[0014] As a preferred solution, the die template includes a die mounting plate, which is fixed to the die head body, a die embedding hole is arranged at the center of the die mounting plate, the die embedding hole is arranged as a step hole, a limiting step surface matching the step hole is arranged on the die body, the die body is embedded in the die embedding hole, and the mounting hole is arranged on the die body.

[0015] As a preferred solution, the ceramic isolation sleeve is a split structure, and there are multiple ceramic isolation sleeves. Each ceramic isolation sleeve includes a ceramic inner sleeve, and a flange plate is provided at the upstream end of the ceramic inner sleeve. A recessed groove adapted to the flange plate is also provided on the upstream plate surface of the mouth template.

[0016] After adopting the above technical scheme, the effect of the present invention is as follows: an extrusion pelletizing device for high-flow elastomer, comprising an extruder, an underwater pelletizing die head is arranged at the downstream end of the extruder, a pipeline water-cooling conveying device is installed downstream of the water-cooling pelletizing die head, the pipeline water-cooling conveying device comprises a pipeline support, a conveying pipe is arranged on the pipeline support, the upstream end of the conveying pipe is fixedly connected with the end of the water-cooling pelletizing die head of the extruder, an upstream section of the conveying pipe is provided with a water inlet, a downstream section of the conveying pipe is provided with a water outlet, the water inlet and the water outlet are connected to a water circulation device, a discharge port is arranged at the downstream end of the conveying pipe, and a guide conveying device for facilitating the traction of the elastomer strip is installed on the pipeline support at the discharge port;

[0017] A drying device for drying the elastomer strips is provided downstream of the guide conveying device, and a pelletizing device for pelletizing the elastomer strips is provided downstream of the drying device; first, the water-cooled pelletizing die head of the extruder extrude the elastomer strips, and then water is introduced into the conveying pipe from the water inlet to effectively cool and harden the extruded elastomer strips, so that the elastomer strips can be continuously conveyed to the discharge port along the conveying pipe, and at the same time, water flows out from the water outlet to avoid flowing out from the discharge port, and finally the elastomer strips are first dried by the drying device at the discharge port, and then pelletized by the pelletizing device; the extrusion pelletizing device can form elastomer strips by water-cooling conveying immediately after extrusion by the extruder, and then conveniently dry and pelletize the cooled elastomer strips, thereby ensuring that the cut particles are more uniform.

[0018] Furthermore, since the guide conveying device includes a conveying frame, a lower guide roller is rotatably mounted on the conveying frame, and a plurality of guide ring grooves are provided on the lower guide roller, and the guide ring grooves correspond to the positions of the discharge ports; the elastomer strips can be inserted through the guide ring grooves to ensure stable and accurate conveying of the elastomer strips.

[0019] Furthermore, since a gantry is provided on the conveying frame, an upper roller frame is installed on the gantry, and the upper roller frame is installed on the gantry through a vertical lifting and adjusting mechanism, an upper guide roller is rotatably installed on the upper roller frame, and the upper guide roller is located above the lower guide roller, and a plurality of guide ring grooves are also provided on the upper guide roller; in this way, the elastomer strips can pass between the upper guide roller and the lower guide roller, and the conveying is more stable and accurate after being constrained by the upper guide roller and the lower guide roller. When the number of elastomer strips extruded by the die head is too large, some of the elastomer strips can pass above the upper guide roller, thereby ensuring the conveying efficiency and improving the conveying flexibility.

[0020] Furthermore, since the conveying pipe includes an upstream horizontal pipe section, a vertical pipe section and a downstream horizontal pipe section, the upstream horizontal pipe section, the vertical pipe section and the downstream horizontal pipe section are connected in sequence through elbows, the upstream horizontal pipe section is fixedly connected to the end of the water-cooled pelletizing die, the water inlet pipe port is arranged on the upstream horizontal pipe section and is close to the water-cooled pelletizing die, and the water outlet pipe port is arranged on the vertical pipe section; when the water-cooled pelletizing die extrude the elastomer strip, it is ensured that there is water flow in the upstream horizontal pipe section to immediately cool the elastomer strip, and at the same time it can ensure linear conveying and ensure the stability of the elastomer strip conveying, and then the vertical pipe section can prevent the water flow from entering the downstream horizontal pipe section, ensure that the water flow flows out from the water outlet pipe port, and ensure the water volume in the conveying pipe, and then the elastomer strip can be conveyed out of the downstream horizontal pipe section by bending, and conveyed to the drying device and the pelletizing device in sequence.

[0021] Furthermore, the water-cooled pelletizing die comprises a die body, a die cavity is arranged on the die body, an electric heating device is arranged outside the die body, a mouth template is detachably fixed to the downstream end of the die body, a plurality of mounting holes are arranged on the mouth template, a ceramic isolation sleeve is installed on the mouth template, a ceramic inner sleeve is embedded in the mounting hole on the ceramic isolation sleeve, the inner hole of the ceramic inner sleeve constitutes an extrusion hole, and the conveying pipe is fixedly connected to the mouth template; the ceramic isolation sleeve is made of non-metallic material, so the thermal conductivity will be reduced, reducing the influence of temperature on the material in the extrusion hole, thereby avoiding the plastic temperature from being carbonized too high and clogging the extrusion hole.

[0022] Furthermore, since the ceramic isolation sleeve includes an isolation plate portion, the downstream plate surface of the isolation plate portion is provided with the ceramic inner sleeve, and the isolation plate portion is attached to the mouth template and pre-pressed between the die body and the mouth template; the mouth template and the die body cooperate with each other to ensure that the isolation plate portion is effectively fixed, so that the ceramic inner sleeve can be in the installation hole, and the installation is accurate and reliable.

[0023] Since the mounting hole is a conical mounting hole, the ceramic inner sleeve is also a conical ceramic inner sleeve accordingly; since the pressure of the material during the extrusion process is very high, the cone-shaped ceramic inner sleeve and the conical mounting hole can ensure that the ceramic inner sleeve is accurately installed during extrusion and ensure the stability of the extruded material.

[0024] Since a ceramic isolation gasket is provided between the die body and the mouth template, the die body and the mouth template are fixed by bolts and the isolation gasket is pressed and fixed, and the isolation gasket presses the isolation plate part; the temperature is further controlled to protect the temperature stability when the material is extruded.

[0025] Furthermore, since the die plate includes a die mounting plate, the die mounting plate is fixed to the die head body, a die embedding hole is arranged at the center of the die mounting plate, the die embedding hole is arranged as a step hole, the die body is arranged with a limiting step surface matching with the step hole, the die body is embedded in the die embedding hole, and the mounting hole is arranged on the die body; this can facilitate the installation and production of the die mounting plate and the die body, thereby facilitating the replacement of the die and reducing costs; at the same time, the step hole and the limiting step surface cooperate to effectively limit the position of the die body, ensuring that the installation position is firmly and stably installed when the material is extruded.

[0026] Furthermore, since the ceramic isolation sleeve is a split structure, there are multiple ceramic isolation sleeves, each of which includes a ceramic inner sleeve, a flange plate is provided at the upstream end of the ceramic inner sleeve, and a recessed groove adapted to the flange plate is also provided on the upstream plate surface of the die plate; the flange plate can increase the contact area with the die plate body, and since the ceramic inner sleeve and the flange plate are forced to be pressed against the die body when the material is extruded, it can also ensure that the discharge is stable and reliable, and a single ceramic inner sleeve is easy to produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 is a stereogram of an embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a delivery pipe according to an embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of a conveying device and a conveying pipe according to an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of a guide conveying device according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the water-cooled pelletizing die head of an embodiment of the present invention;

[0033] Figure 6 is a cross-sectional view of a water-cooled pelletizing die head according to an embodiment of the present invention;

[0034] Figure 7 It is a structural schematic diagram of a port template and a ceramic inner sleeve according to an embodiment of the present invention;

[0035] Figure 8 It is a schematic diagram of another structure of the inlet template and the ceramic inner sleeve according to an embodiment of the present invention;

[0036] Fig. 9 yes Figure 6 A partial enlarged view of point A;

[0037] In the attached drawings: 1. bracket; 2. upstream horizontal pipe section; 3. vertical pipe section; 4. downstream horizontal pipe section; 5. water-cooled pelletizing die; 6. water inlet pipe; 7. water outlet pipe; 8. discharge port; 9. conveyor frame; 10. lower guide roller; 11. guide ring groove; 12. gantry; 13. upper roller frame; 14. upper guide roller; 15. screw lift; 16. extruder; 17. die body; 18. mold cavity; 19. electric heating device; 20. die body; 21. mounting hole; 22. ceramic inner sleeve; 23. extrusion hole; 24. isolation plate; 25. isolation gasket; 26. die mounting plate; 27. die embedded hole; 28. limit step surface; 29. ​​ceramic isolation sleeve; 30. flange plate; 31. sink; 32. drying device; 33. pelletizing device. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below through specific examples.

[0039] like Figures 1 to 9 As shown, an extrusion pelletizing device for a high-flow elastomer comprises an extruder 16, wherein an underwater pelletizing die head is provided at the downstream end of the extruder 16, a pipeline water-cooling conveying device is installed downstream of the water-cooling pelletizing die head 5, and the pipeline water-cooling conveying device comprises a pipeline support 1, wherein a conveying pipe is provided on the pipeline support 1, and the upstream end of the conveying pipe is fixedly connected with the end of the water-cooling pelletizing die head 5 of the extruder 16, and the upstream section of the conveying pipe is provided with a water inlet pipe port 6, and the downstream section of the conveying pipe is provided with a water outlet pipe port 7, wherein the water inlet pipe port 6 and the water outlet pipe port 7 are connected to a water circulation device, and a discharge port 8 is provided at the downstream end of the conveying pipe, and a guide conveying device for facilitating the traction of the elastomer strip is installed at the discharge port 8 on the pipeline support 1;

[0040] A drying device 32 for drying the elastomer strips is arranged downstream of the guide conveying device, and a pelletizing device 33 for pelletizing the elastomer strips is arranged downstream of the drying device 32 .

[0041] like Figure 2 and Figure 4 As shown, the guide conveying device includes a conveying frame 9, on which a lower guide roller 10 is rotatably mounted, and the lower guide roller 10 is provided with a plurality of guide ring grooves 11, which correspond to the position of the discharge port 8; the guide ring grooves 11 can be used to insert the elastic body strip to ensure stable and accurate conveying of the elastic body strip, and the distance between the lower guide roller 10 and the discharge port 8 can be adjusted to adapt to supporting and conveying different elastic body strips. Then, the elastic body strip can be stably and accurately conveyed to the drying device 32 through the lower guide roller 10.

[0042] In this embodiment, a gantry 12 is provided on the conveying frame 9, and an upper roller frame 13 is installed on the gantry 12. The upper roller frame 13 is installed on the gantry 12 through a vertical lifting adjustment mechanism. An upper guide roller 14 is rotatably installed on the upper roller frame 13, and the upper guide roller 14 is located above the lower guide roller 10. The upper guide roller 14 is also provided with a plurality of guide ring grooves 11; in this way, the elastomer strip can pass between the upper guide roller 14 and the lower guide roller 10, and the conveying is more stable and accurate after being constrained by the upper guide roller 14 and the lower guide roller 10. When the number of elastomer strips extruded by the die head is too large, some of the elastomer strips can pass from above the upper guide roller 14, thereby ensuring the conveying efficiency and improving the conveying flexibility.

[0043] In this embodiment, the upper roller frame 13 is installed on the gantry 12 through a vertical lifting adjustment mechanism; the distance between the upper guide roller 14 and the lower guide roller 10 is adjusted by adjusting the height of the upper roller frame 13 to adapt to elastic strips of different sizes, thereby ensuring stable and accurate transportation between the upper guide roller 14 and the lower guide roller 10.

[0044] Furthermore, the vertical lifting adjustment mechanism is a screw lift 15; the screw lift 15 is fixedly installed on the gantry 12, and the lifting rod is connected to the guide roller 14, so that the lifting can be driven, the structure is simple, and the adjustment is convenient and fast; the screw lift 15 is an existing structure on the market, so it is not described in detail in the article.

[0045] like Figure 3 As shown, the delivery pipe includes an upstream horizontal pipe section 2, a vertical pipe section 3 and a downstream horizontal pipe section 4, the upstream horizontal pipe section 2, the vertical pipe section 3 and the downstream horizontal pipe section 4 are connected in sequence through elbows, the upstream horizontal pipe section 2 is fixedly connected to the end of the water-cooled pelletizing die 5, the water inlet pipe port 6 is arranged on the upstream horizontal pipe section 2 and close to the water-cooled pelletizing die 5, the water outlet pipe port 7 is arranged on the vertical pipe section 3; the downstream horizontal pipe section 4 is located above the upstream horizontal pipe section 2, which can prevent the outflow of water flow and ensure that the water flow flows out from the water outlet pipe port 7. After the pelletizing die 5 extrude the elastomer strip, water flow is ensured in the upstream horizontal pipe section 2 to immediately cool the elastomer strip, while ensuring linear transportation and stable transportation of the elastomer strip. Then the vertical pipe section 3 prevents the water flow from entering the downstream horizontal pipe section 4, ensuring the cooling effect of the water in the conveying pipe on the elastomer strip. Then the elastomer strip passes through the vertical pipe section 3 by bending, and the water on the elastomer strip automatically falls due to gravity, and is finally transported out from the downstream horizontal pipe section 4, and is transported to the drying device 32 and the pelletizing device 33 in turn through the upper guide roller 14 and the lower guide roller 10.

[0046] The drying device 32 and the pelletizing device 33 are used in a thermoplastic elastomer molding production line of Patent No. 202211710568.3, and are the corresponding air cooling device and pelletizing device 33, so they are not described in detail in this article.

[0047] like Figure 5 and Figure 6 As shown, the water-cooled pelletizing die 5 includes a die body 17, a die cavity 18 is provided on the die body 17, an electric heating device 19 is provided on the outside of the die body 17, a die plate is detachably fixed at the downstream end of the die body 17, a plurality of mounting holes 21 are provided on the die plate, a ceramic isolation sleeve 29 is installed on the die plate, a ceramic inner sleeve 22 embedded in the mounting hole 21 is provided on the ceramic isolation sleeve 29, the inner hole of the ceramic inner sleeve 22 constitutes an extrusion hole 23, and the conveying pipe is fixedly connected to the die plate; since the electric heating device 19 continuously heats the die body 17, the direct contact between the die plate and the die body 17 will cause the temperature of the die plate to rise, and the volume of the material becomes smaller during extrusion, and the temperature is more likely to rise when in contact with the die plate, and the ceramic isolation sleeve 29 is made of ceramic material, so the thermal conductivity will be reduced, reducing the influence of temperature on the material in the extrusion hole 23, thereby avoiding the plastic temperature from being carbonized too high and clogging the extrusion hole 23.

[0048] like Figure 7 and Fig. 9 As shown, the ceramic isolation sleeve 29 includes an isolation plate portion 24, and the downstream plate surface of the isolation plate portion 24 is provided with the ceramic inner sleeve 22. The isolation plate portion 24 is attached to the mouth template and pre-pressed between the die body 17 and the mouth template; the mouth template and the die body 17 cooperate with each other to ensure that the isolation plate portion 24 is effectively fixed, so that the ceramic inner sleeve 22 can be located in the mounting hole 21, and the installation is accurate and reliable.

[0049] Furthermore, the mounting hole 21 is a conical mounting hole 21, and correspondingly, the ceramic inner sleeve 22 is also a conical ceramic inner sleeve 22; since the pressure of the material during the extrusion process is very large, the cone-shaped ceramic inner sleeve 22 cooperates with the conical mounting hole 21 to ensure that the ceramic inner sleeve 22 is accurately installed during extrusion and ensure the stability of the extruded material; the ceramic inner sleeve 22 is made of non-metallic material and does not have good thermal conductivity, and can effectively isolate the heat transmitted from the die body 17 to the mouth template.

[0050] like Figure 6As shown, a ceramic isolation gasket 25 is also provided between the die body 17 and the mouth template. The die body 17 and the mouth template are fixed by bolts and the isolation gasket 25 is pressed and fixed. The isolation gasket 25 presses the isolation plate portion 24. Since the temperature on the die head will also affect the extrusion of the material, the isolation gasket 25 is used for further isolation to control the temperature and protect the temperature stability of the material during extrusion, while ensuring that the ceramic inner sleeve 22 is firmly installed.

[0051] In this embodiment, the die plate includes a die mounting plate 26, which is fixed to the die body 17, and a die embedding hole 27 is arranged at the center of the die mounting plate 26, and the die embedding hole 27 is arranged as a step hole, and a limiting step surface 28 matching the step hole is arranged on the die body 20, and the die body 20 is embedded in the die embedding hole 27, and the mounting hole 21 is arranged on the die body 20; the die body 20 is embedded in the die embedding hole 27, and the die mounting plate 26 is fixed to the isolation gasket 25 and the die body 17 to complete the installation, which can facilitate the installation and production of the die mounting plate 26 and the die body 20, thereby facilitating the replacement of the die and reducing costs; at the same time, the step hole and the limiting step surface 28 cooperate to effectively limit the position of the die body 20, ensuring that the installation position is firmly and stably installed when the material is extruded.

[0052] like Figure 8 As shown, the ceramic isolation sleeve 29 is a split structure, and the number of the ceramic isolation sleeves 29 is multiple, each ceramic isolation sleeve 29 includes a ceramic inner sleeve 22, and the upstream end of the ceramic inner sleeve 22 is provided with a flange plate 30, and the upstream plate surface of the mouth mold plate is also provided with a sink groove 31 adapted to the flange plate 30; the flange plate 30 can increase the contact area with the mouth mold plate body, because the ceramic inner sleeve 22 and the flange plate 30 are forced to be pressed against the mouth mold body 20 when the material is extruded, so that the discharge can be stable and reliable, and the production of a single ceramic inner sleeve 22 is convenient; the sink groove 31 can further limit the installation position of the ceramic inner sleeve 22, further ensure stable and reliable installation, and make the side of the mouth mold body 20 flush, thereby improving the aesthetics.

[0053] The working principle of this embodiment is as follows: first, the water-cooled pelletizing die head 5 of the extruder 16 extrude the elastomer strips through the ceramic inner sleeve 22, and water enters the water inlet pipe 6. After being cooled in the upstream horizontal pipe section 2, the elastomer strips are bent into the vertical pipe section 3, and then enter the downstream horizontal pipe section 4, and finally transported out from the discharge port 8. Then, they are arranged in sequence according to the number of extruded elastomer strips and placed on the guide ring groove 11 of the corresponding lower guide roller 10. Then, the screw elevator 15 drives the upper guide roller 14 to descend and cooperates with the lower guide roller 10 for transportation. When the number of elastomer strips exceeds the number of guide ring grooves 11 of the lower guide roller 10, the elastomer strips pass through the guide ring grooves 11 of the upper guide roller 14 and the lower guide roller 10 respectively, and then pass through the drying device 32 and the pelletizing device 33 in sequence to complete the processing.

[0054] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An extrusion pelletizing device for a high-flow elastomer, comprising an extruder, wherein an underwater pelletizing die head is provided at the downstream end of the extruder, characterized in that: A pipeline water-cooled conveying device is installed downstream of the water-cooled pelletizing die head, and the pipeline water-cooled conveying device includes a pipeline support, a conveying pipe is arranged on the pipeline support, the upstream end of the conveying pipe is fixedly connected with the end of the water-cooled pelletizing die head of the extruder, the upstream section of the conveying pipe is provided with a water inlet, the downstream section of the conveying pipe is provided with a water outlet, the water inlet and the water outlet are connected to a water circulation device, the downstream end of the conveying pipe is provided with a discharge port, and a guide conveying device for facilitating the traction of the elastomer strip is installed on the pipeline support at the discharge port; a drying device for drying the elastomer strip is arranged downstream of the guide conveying device, and a pelletizing device for pelletizing the elastomer strip is arranged downstream of the drying device.

2. The extrusion pelletizing device for a high-flow elastomer according to claim 1, characterized in that: The guide conveying device comprises a conveying frame, on which a lower guide roller is rotatably mounted, and on which a plurality of guide ring grooves are arranged, and the guide ring grooves correspond to the positions of the discharge port.

3. The extrusion and pelletizing device for a high-flow elastomer according to claim 2, characterized in that: The conveying frame is provided with a gantry frame, and an upper roller frame is installed on the gantry frame. The upper roller frame is installed on the gantry frame through a vertical lifting adjustment mechanism. An upper guide roller is rotatably installed on the upper roller frame. The upper guide roller is located above the lower guide roller, and a plurality of guide ring grooves are also provided on the upper guide roller.

4. The extrusion and pelletizing device for a high-flow elastomer according to claim 3, characterized in that: The conveying pipe includes an upstream horizontal pipe section, a vertical pipe section and a downstream horizontal pipe section, wherein the upstream horizontal pipe section, the vertical pipe section and the downstream horizontal pipe section are connected in sequence through elbows, the upstream horizontal pipe section is fixedly connected to the end of a water-cooled pelletizing die head, the water inlet pipe port is arranged on the upstream horizontal pipe section and close to the water-cooled pelletizing die head, and the water outlet pipe port is arranged on the vertical pipe section.

5. The extrusion and pelletizing device for a high-flow elastomer according to claim 1, characterized in that: The water-cooled pelletizing die includes a die body, a die cavity is arranged on the die body, an electric heating device is arranged outside the die body, a mouth template is detachably fixed to the downstream end of the die body, a plurality of mounting holes are arranged on the mouth template, a ceramic isolation sleeve is installed on the mouth template, a ceramic inner sleeve is embedded in the mounting hole on the ceramic isolation sleeve, the inner hole of the ceramic inner sleeve constitutes an extrusion hole, and the conveying pipe is fixedly connected to the mouth template.

6. The extrusion and pelletizing device for a high-flow elastomer according to claim 5, characterized in that: The ceramic isolation sleeve comprises an isolation plate portion, a downstream plate surface of which is provided with the ceramic inner sleeve, and the isolation plate portion is attached to the die plate and pre-pressed between the die body and the die plate.

7. The extrusion pelletizing device for high-flow elastomer according to claim 6, characterized in that: The mounting hole is a tapered mounting hole, and correspondingly, the ceramic inner sleeve is also a tapered ceramic inner sleeve.

8. The extrusion pelletizing device for high-flow elastomer according to claim 7, characterized in that: A ceramic isolation gasket is also arranged between the die body and the die plate. The die body and the die plate are fixed by bolts and the isolation gasket is pressed and fixed. The isolation gasket presses the isolation plate part.

9. The extrusion and pelletizing device for a high-flow elastomer according to claim 7, characterized in that: The die plate includes a die mounting plate, which is fixed to the die head body. A die embedding hole is provided at the center of the die mounting plate, and the die embedding hole is configured as a step hole. A limiting step surface matching the step hole is provided on the die body. The die body is embedded in the die embedding hole, and the mounting hole is provided on the die body.

10. The extrusion and pelletizing device for high-flow elastomer according to claim 5, characterized in that: The ceramic isolation sleeve is a split structure, and there are multiple ceramic isolation sleeves. Each ceramic isolation sleeve includes a ceramic inner sleeve. A flange plate is provided at the upstream end of the ceramic inner sleeve, and a sink groove adapted to the flange plate is also provided on the upstream plate surface of the mouth template.

Images