Extrusion pelletizing device for high-flow elastomer

Abstract

The utility model discloses an extrusion pelletizing device for a high-flow elastomer, which comprises an extruder, the downstream end of the extruder is provided with a water-cooling pelletizing die head, the downstream of the water-cooling pelletizing die head is provided with a pipeline water-cooling conveying device, the pipeline water-cooling conveying device comprises a pipeline support, the pipeline support is provided with a conveying pipe, and the conveying pipe 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 utility model relates to the technical field of plastic elastomer production, especially to an extrusion and pelletizing device for high-flow elastomer. BACKGROUND

[0002] In the production process of plastic particles, plastic is heated and melted by an extruder and then extruded and pelletized. Currently, there are two ways to transport the pelletized material: underwater pelletizing and water tank pelletizing. The applicant previously applied for an underwater pelletizer with publication number CN116021666A. This underwater pelletizer performs the pelletizing process underwater, and the pelletized material directly flows out with the water flow.

[0003] However, when producing some high-flow elastomers, the material is heated and melted by the extruder and then extruded from the die head. The current die head is a metal die head with a large number of holes. When the material is heated and melted in the extruder, the material in direct contact with the extruder die head may carbonize and turn black due to excessive temperature. The carbonized and blackened material will adhere to the discharge holes of the die head, causing the discharge port to be blocked, thereby affecting the efficiency of the die head extrusion. In addition, it needs to be disassembled and cleaned, which is very wasteful of manpower and time, causing downtime. At the same time, high-flow elastomers have strong fluidity, so the extrusion pressure of the material by the extruder screw is not uniform. Since the material has strong fluidity, the amount of material accumulated at the lower part of the die head will be more than that at the upper part of the die head. When the extruder extrudes, the extrusion force on the small holes at the lower part of the die head will be greater than that on the small holes at the upper part. Therefore, there will be some differences in the extrusion amount and speed of the material extruded from the die head. Since the rotating speed of the pelletizing cutter of the extruder is consistent when pelletizing, the length of the cut particles will be different due to the difference in extrusion speed between the upper and lower extrusion holes of the die head, resulting in uneven particles. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide an extrusion and pelletizing device for high-flow elastomer, which can immediately water-cool and transport the extruded elastomer strip, then conveniently dry and pelletize the cooled elastomer strip, thereby ensuring more uniform particles.

[0005] The utility model discloses a technical scheme for solving the above technical problems: a kind of extrusion granulation device of high flow elastomer, downstream end of the extruder is provided with water-cooling granulating die, downstream installation of water-cooling granulating die has pipeline water-cooling conveying device, the pipeline water-cooling conveying device includes pipe support, conveying pipe is arranged on the pipe support, the upstream end of the conveying pipe is fixedly communicated with the end of water-cooling granulating die of extruder, the upstream section of the conveying pipe is provided with water inlet, the downstream section of the conveying pipe is provided with water outlet, the water inlet and water outlet connect water circulation device, the downstream end of the conveying pipe is provided with discharge port, guide conveying device for facilitating elastomer strip traction is installed on the pipe support at discharge port;

[0006] The downstream of the guide conveying device is provided with a drying device for drying the elastomer strip, and the downstream of the drying device is provided with a granulating device for granulating the elastomer strip.

[0007] As a preferred scheme, the guide conveying device includes a conveying frame, a lower guide roller is rotatably installed on the conveying frame, a plurality of guide ring grooves are arranged on the lower guide roller, and the guide ring grooves correspond to the position of the discharge port.

[0008] As a preferred scheme, a gantry is arranged 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 adjusting 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 arranged on the upper guide roller.

[0009] As a preferred scheme, 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 sequentially connected through elbows, the upstream horizontal pipe section is fixedly communicated with the end of the water-cooling granulating die, the water inlet is arranged on the upstream horizontal pipe section and close to the water-cooling granulating die, and the water outlet is arranged on the vertical pipe section.

[0010] As a preferred scheme, the water-cooling granulating 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 die plate is detachably fixed to the downstream end of the die body, a plurality of mounting holes are arranged on the die plate, a ceramic isolation sleeve is installed on the die plate, a ceramic inner sleeve is arranged on the ceramic isolation sleeve and embedded in the mounting hole, an inner hole of the ceramic inner sleeve constitutes an extrusion hole, and the conveying pipe is fixedly connected with the die plate.

[0011] As a preferred scheme, the ceramic isolation sleeve comprises an isolation plate part, a downstream plate face of the isolation plate part is provided with the ceramic inner sleeve, the isolation plate part is attached to the die plate and is pre-pressed between the die body and the die plate.

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

[0013] As a preferred scheme, a ceramic isolation gasket is further 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 tightly fixed, and the isolation gasket tightly presses the isolation plate part.

[0014] As a preferred scheme, the die plate comprises a die mounting plate, the die mounting plate is fixed between the die body, a die embedding hole is arranged at the center of the die mounting plate, the die embedding hole is arranged as a stepped hole, a limiting stepped surface is arranged on the die mounting plate and matched with the stepped hole, a die body is embedded in the die embedding hole, and the mounting hole is arranged on the die body.

[0015] As a preferred scheme, the ceramic isolation sleeve is of a split structure, the number of the ceramic isolation sleeves is multiple, each ceramic isolation sleeve comprises one ceramic inner sleeve, a flange plate is arranged at the upstream end of the ceramic inner sleeve, and a sink groove matched with the flange plate is further arranged on the upstream plate face of the die plate.

[0016] After the above technical scheme is adopted, the effect of the extrusion and pelletizing device for high flow elastomer is that the extrusion and pelletizing device for high flow elastomer comprises an extruder, a water-cooled pelletizing die head is arranged at the downstream end of the extruder, a pipeline water-cooled conveying device is mounted downstream of the water-cooled pelletizing die head, the pipeline water-cooled conveying device comprises a pipeline support, a conveying pipe is arranged on the pipeline support, the upstream end of the conveying pipe is fixedly communicated with the end of the water-cooled pelletizing die head of the extruder, a water inlet is arranged on the upstream section of the conveying pipe, a water outlet is arranged on the downstream section of the conveying pipe, the water inlet and the water outlet are connected with a water circulating device, a discharge port is arranged at the downstream end of the conveying pipe, and a guide conveying device for conveniently pulling the elastomer strip is mounted on the pipeline support at the discharge port.

[0017] The downstream of the guiding conveying device is provided with a drying device for drying the elastomer strip, and the downstream of the drying device is provided with a pelletizing device for pelletizing the elastomer strip; first, the water cooling pelletizing die of the extruder extrudes the elastomer strip, then water is fed into the conveying pipe from the water inlet pipe, the extruded elastomer strip is effectively cooled and hardened, so that the elastomer strip can be continuously conveyed to the discharge port along the conveying pipe, at the same time, the water flows out of the water outlet pipe to avoid flowing out of the discharge port, and finally the elastomer strip passes through the drying device to dry the elastomer strip, and then passes through the pelletizing device to pelletize the elastomer strip; the extrusion and pelletizing device can immediately water cool and convey the elastomer strip after extrusion by the extruder, and then dry and pelletize the cooled elastomer strip, so that the cut particles are more uniform.

[0018] In addition, the guiding conveying device comprises a conveying frame, a lower guide roller is rotatably installed on the conveying frame, a plurality of guide ring grooves are arranged on the lower guide roller, and the guide ring grooves correspond to the position of the discharge port; the guide ring grooves can make the elastomer strip be clamped, so as to ensure stable and accurate conveying of the elastomer strip.

[0019] In addition, a portal frame is arranged on the conveying frame, an upper roller frame is installed on the portal frame, the upper roller frame is installed on the portal frame through a vertical lifting adjusting 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 arranged on the upper guide roller; in this way, the elastomer strip can pass between the upper guide roller and the lower guide roller, and the conveying is more stable and accurate under the constraint of the upper guide roller and the lower guide roller; when the number of the elastomer strip extruded by the die is too large, part of the elastomer strip can pass above the upper guide roller, so as to ensure the conveying efficiency and improve the flexibility of the conveying.

[0020] In addition, the conveying pipe comprises 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 communicated with the end of the water cooling pelletizing die, the water inlet pipe is arranged on the upstream horizontal pipe section and close to the water cooling pelletizing die, and the water outlet pipe is arranged on the vertical pipe section; after the water cooling pelletizing die extrudes the elastomer strip, water flow in the upstream horizontal pipe section can immediately cool the elastomer strip, and at the same time, the straight line conveying is ensured, so as to ensure the stability of the conveying of the elastomer strip, then the vertical pipe section can prevent the water flow from entering the downstream horizontal pipe section, so as to ensure that the water flow flows out of the water outlet pipe and the water amount in the conveying pipe, and then the elastomer strip can be conveyed out of the downstream horizontal pipe section through the bending, and then conveyed to the drying device and the pelletizing device in sequence.

[0021] And since the water-cooled cutting granulating die head comprises a die head body, the die head body is provided with a die cavity, the outside of the die head body is provided with an electric heating device, the downstream end of the die head body is detachably fixed with a die plate, the die plate is provided with a plurality of mounting holes, the die plate is provided with a ceramic isolation sleeve, the ceramic isolation sleeve is provided with a ceramic inner sleeve embedded in the mounting hole, the inner hole of the ceramic inner sleeve constitutes an extrusion hole, and the conveying pipe is fixedly connected with the die plate; the ceramic isolation sleeve is of non-metal material, so the heat conductivity is reduced, the influence of temperature on the material in the extrusion hole is reduced, and the extrusion hole is prevented from being blocked due to carbonization of the plastic due to excessively high temperature.

[0022] And since the ceramic isolation sleeve comprises an isolation plate part, the downstream plate surface of the isolation plate part is provided with the ceramic inner sleeve, and the isolation plate part is attached to the die plate and is pre-pressed between the die head body and the die plate; the cooperation of the die plate and the die head body ensures effective fixation of the isolation plate part, so that the ceramic inner sleeve can be installed in the mounting hole accurately and reliably.

[0023] And since the mounting hole is a conical mounting hole, correspondingly, the ceramic inner sleeve is also a conical ceramic inner sleeve; since the pressure of the material during extrusion is very high, the cooperation of the conical ceramic inner sleeve and the conical mounting hole can ensure accurate installation of the ceramic inner sleeve during extrusion of the material, and ensure the stability of the extrusion.

[0024] And since the die head body and the die plate are further provided with a ceramic isolation gasket, the die head body and the die plate are fixed by bolts and the isolation gasket is tightly fixed, and the isolation gasket tightly presses the isolation plate part; the temperature is further controlled to protect the stability of the temperature during extrusion of the material.

[0025] And since the die plate comprises a die plate mounting plate, the die plate mounting plate is fixed between the die head body, the center of the die plate mounting plate is provided with a die plate embedding hole, the die plate embedding hole is provided as a stepped hole, the die plate mounting plate is provided with a limiting stepped surface matched with the stepped hole, the die plate embedding hole is embedded with a die plate body, and the mounting hole is provided on the die plate body; this can facilitate the installation and production of the die plate mounting plate and the die plate body, thereby facilitating replacement of the die plate and reducing costs; at the same time, the cooperation of the stepped hole and the limiting stepped surface effectively limits the position of the die plate body, ensures that the installation position is firmly and stably installed during extrusion of the material.

[0026] And since the ceramic isolation sleeve is of split structure, the number of the ceramic isolation sleeve is multiple, each ceramic isolation sleeve comprises one ceramic inner sleeve, the upstream end of the ceramic inner sleeve is provided with a flange plate, and the upstream plate surface of the die plate is also provided with a sink groove matched with the flange plate; the flange plate can increase the contact area with the die plate body, since the ceramic inner sleeve and the flange plate are forced to be pressed on the die body during material extrusion, thus the stable and reliable discharging can be ensured, and the single ceramic inner sleeve is convenient to produce. BRIEF DESCRIPTION OF DRAWINGS

[0027] The utility model is further explained below in combination with the drawings and examples.

[0028] Figure 1 is the perspective view of the utility model embodiment;

[0029] Figure 2 is the structural schematic view of the conveying pipe of the utility model embodiment;

[0030] Figure 3 is the sectional view of the utility model embodiment to the conveying device and the conveying pipe;

[0031] Figure 4 is the structural schematic view of the guiding conveying device of the utility model embodiment;

[0032] Figure 5 is the structural schematic view of the water-cooling cutting granulating die head of the utility model embodiment;

[0033] Figure 6 is the sectional view of the water-cooling cutting granulating die head of the utility model embodiment;

[0034] Figure 7 is the structural schematic view of one kind of the die plate and the ceramic inner sleeve of the utility model embodiment;

[0035] Figure 8 is the structural schematic view of another kind of the die plate and the ceramic inner sleeve of the utility model embodiment;

[0036] Figure 9 is Figure 6 the local enlarged view of A;

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

[0038] The utility model will be described in further detail below through specific embodiments.

[0039] As Figures 1 to 9 shown, an extrusion cutting device for high-flow elastomers includes an extruder 16, the downstream end of which is provided with a water-cooled cutting die, the downstream of the water-cooled cutting die 5 is provided with a pipeline water-cooled conveying device, the pipeline water-cooled conveying device includes a pipeline support 1, the pipeline support 1 is provided with a conveying pipe, the upstream end of the conveying pipe is fixedly communicated with the end of the water-cooled cutting die 5 of the extruder 16, the upstream section of the conveying pipe is provided with a water inlet 6, the downstream section of the conveying pipe is provided with a water outlet 7, the water inlet 6 and the water outlet 7 are connected with a water circulating device, the downstream end of the conveying pipe is provided with a discharge port 8, the pipeline support 1 is provided with a guide conveying device at the discharge port 8 for facilitating the traction of the elastomer strip.

[0040] The downstream of the guide conveying device is provided with a drying device 32 for drying the elastomer strip, the downstream of the drying device 32 is provided with a cutting device 33 for cutting the elastomer strip.

[0041] As Figure 2 and Figure 4 shown, the guide conveying device includes a conveying frame 9, the conveying frame 9 is rotatably provided with a lower guide roller 10, the lower guide roller 10 is provided with a plurality of guide ring grooves 11, the guide ring grooves 11 correspond to the position of the discharge port 8; the guide ring grooves 11 can make the elastomer strip be clamped, ensuring the stable and accurate conveying of the elastomer strip, and at the same time, the distance between the lower guide roller 10 and the discharge port 8 can be adjusted to adapt to the support and conveying of different elastomer strips. Then, the lower guide roller 10 can make the elastomer strip be conveyed stably and accurately to the drying device 32.

[0042] In the embodiment, the conveying frame 9 is provided with a portal frame 12, the upper roller frame 13 is installed on the portal frame 12, the upper roller frame 13 is installed on the portal frame 12 through a vertical lifting adjusting mechanism, the upper guide roller 14 is rotatably installed on the upper roller frame 13, the upper guide roller 14 is located above the lower guide roller 10, and a plurality of guide ring grooves 11 are also arranged on the upper guide roller 14. 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, part of the elastomer strips can pass above the upper guide roller 14, ensuring the conveying efficiency and improving the flexibility of conveying.

[0043] In the embodiment, the upper roller frame 13 is installed on the portal frame 12 through a vertical lifting adjusting mechanism. The height of the upper roller frame 13 is adjusted to adjust the distance between the upper guide roller 14 and the lower guide roller 10, so as to adapt to elastomer strips of different sizes and ensure stable and accurate conveying between the upper guide roller 14 and the lower guide roller 10.

[0044] Further, the vertical lifting adjusting mechanism is a lead screw lifter 15. The lead screw lifter 15 is fixedly installed on the portal frame 12, and the lifting rod is connected to the upper guide roller 14, so that the lifting can be driven. The structure is simple, and the adjustment is convenient and fast. The lead screw lifter 15 is a structure existing on the market, and thus is not described in detail herein.

[0045] As shown in Figure 3 The conveying pipe includes an upstream horizontal pipe section 2, a vertical pipe section 3 and a downstream horizontal pipe section 4, which are connected in sequence through elbows. The upstream horizontal pipe section 2 is fixedly communicated with the end of the water-cooled cutting die 5. The water inlet 6 is arranged on the upstream horizontal pipe section 2 and close to the water-cooled cutting die 5. The water outlet 7 is arranged on the vertical pipe section 3. The downstream horizontal pipe section 4 is located above the upstream horizontal pipe section 2, so as to prevent the water flow from flowing out, ensure that the water flow flows out from the water outlet 7, and ensure that the water flow cools the elastomer strip immediately after the water-cooled cutting die 5 extrudes the elastomer strip. At the same time, the straight-line conveying is ensured, the stability of the elastomer strip conveying is ensured, then the vertical pipe section 3 can prevent the water flow from entering the downstream horizontal pipe section 4, so as to ensure the cooling effect of the water amount in the conveying pipe on the elastomer strip. Then, the elastomer strip passes through the vertical pipe section 3 by bending, the water on the elastomer strip automatically falls down due to gravity, and finally the elastomer strip is conveyed out from the downstream horizontal pipe section 4 and conveyed to the drying device 32 and the cutting device 33 in sequence through the upper guide roller 14 and the lower guide roller 10.

[0046] The drying device 32 and the pelletizing device 33 are applied in a thermoplastic elastomer forming production line with patent number 202211710568.3, which are corresponding air cooling devices and pelletizing devices 33, and therefore are not described in detail herein.

[0047] As shown in Figure 5 and Figure 6 The water-cooled pelletizing die 5 includes a die body 17 provided with a die cavity 18, an external part of the die body 17 is provided with an electric heating device 19, a downstream end of the die body 17 is detachably fixed with a die plate, the die plate is provided with a plurality of mounting holes 21, the die plate is installed with a ceramic isolation sleeve 29, the ceramic isolation sleeve 29 is provided with a ceramic inner sleeve 22 embedded in the mounting hole 21, an inner hole of the ceramic inner sleeve 22 constitutes an extrusion hole 23, and the conveying pipe is fixedly connected with the die plate; Since the die body 17 is continuously heated by the electric heating device 19, the die plate directly contacts the die body 17, which causes the temperature of the die plate to rise. When the material is extruded, the volume becomes smaller, and the temperature rises more easily when contacting the die plate. The ceramic isolation sleeve 29 is made of ceramic material, so the thermal conductivity is reduced, and the influence of temperature on the material in the extrusion hole 23 is reduced, thereby avoiding the blockage of the extrusion hole 23 due to the high temperature carbonization of the plastic.

[0048] As shown in Figure 7 and Figure 9 The ceramic isolation sleeve 29 includes an isolation plate part 24, the downstream plate surface of the isolation plate part 24 is provided with the ceramic inner sleeve 22, the isolation plate part 24 is attached to the die plate and is pre-pressed between the die body 17 and the die plate; The isolation plate part 24 is effectively fixed by the cooperation of the die plate and the die body 17, so that the ceramic inner sleeve 22 can be installed in the mounting hole 21 accurately and reliably.

[0049] Further, the mounting hole 21 is a tapered mounting hole 21, and correspondingly, the ceramic inner sleeve 22 is also a tapered ceramic inner sleeve 22; Since the pressure is very large during the extrusion process of the material, the cooperation of the tapered ceramic inner sleeve 22 and the tapered mounting hole 21 can ensure the accurate installation of the ceramic inner sleeve 22 during the extrusion of the material, and ensure the stability of the extrusion; The ceramic inner sleeve 22 is made of non-metallic material and has poor thermal conductivity, which can effectively isolate the heat transmitted from the die body 17 to the die plate.

[0050] As shown in Figure 6As shown, the die body 17 and the die plate are also provided with a ceramic isolation gasket 25, the die body 17 and the die plate are fixed by bolts and the isolation gasket 25 is pressed and fixed, the isolation gasket 25 presses the isolation plate part 24; because the temperature of the die also has an effect on the material extrusion, so through the isolation gasket 25 to further isolate, control the temperature, protect the temperature stability when the material extrusion, at the same time ensure the ceramic inner sleeve 22 installation firm.

[0051] In this embodiment, the die plate includes a die mounting plate 26, the die mounting plate 26 is fixed between the die body 17, the center of the die mounting plate 26 is provided with a die embedding hole 27, the die embedding hole 27 is provided as a stepped hole, the die mounting plate 26 is provided with a limiting step surface 28 matched with the stepped hole, the die body 20 is embedded in the die embedding hole 27, the mounting hole 21 is arranged on the die body 20; embedding the die body 20 into the die embedding hole 27 is fixed with the die mounting plate 26, the isolation gasket 25 and the die body 17, the installation is completed, which can facilitate the installation of the die mounting plate 26 and the die body 20, so as to facilitate the replacement of the die, reduce the cost; at the same time, the stepped hole and the limiting step surface 28 cooperate to effectively limit the position of the die body 20, so as to ensure the installation position firm and stable when the material is extruded.

[0052] As shown in the figure, Figure 8 The ceramic isolation sleeve 29 is a split structure, the number of ceramic isolation sleeves 29 is multiple, each ceramic isolation sleeve 29 includes a ceramic inner sleeve 22, the upstream end of the ceramic inner sleeve 22 is provided with a flange plate 30, the upstream plate surface of the die plate is also provided with a sink 31 matched with the flange plate 30; the flange plate 30 can increase the contact area with the die plate body, because the material extrusion can force the ceramic inner sleeve 22 and the flange plate 30 to be pressed on the die body 20, so as to ensure the stable and reliable discharge, and the single ceramic inner sleeve 22 is convenient to produce; the sink 31 can further limit the installation position of the ceramic inner sleeve 22, further ensure the stable and reliable installation, and make the side surface of the die body 20 flush, improve the appearance.

[0053] The working principle of the embodiment is as follows: firstly, the water-cooling pelletizing die head 5 of the extruder 16 extrudes the elastomer strip through the ceramic inner sleeve 22, water is fed into the water inlet 6, the elastomer strip is cooled in the upstream horizontal pipe section 2, is bent into the vertical pipe section 3, then is fed into the downstream horizontal pipe section 4, and finally is fed out from the discharge port 8, and the number of the extruded elastomer strips is arranged in sequence and placed on the guide ring groove 11 corresponding to the lower guide roller 10, then the lead screw elevator 15 drives the upper guide roller 14 to descend and cooperate with the lower guide roller 10 to feed; when the number of the elastomer strips exceeds the number of the guide ring grooves 11 of the lower guide roller 10, the elastomer strips pass above the guide ring grooves 11 of the upper guide roller 14 and the lower guide roller 10 respectively, then pass through the drying device 32 and the pelletizing device 33 in sequence to complete processing.

[0054] The above-described embodiments are only descriptions of preferred embodiments of the present application and are not intended to limit the scope of the present application, and various modifications and improvements of the technical solutions of the present application made without departing from the design spirit of the present application shall all fall within the protection scope defined by the claims of the present application.

Claims

1. An extrusion strand cutting apparatus for high flow elastomers comprising an extruder, the downstream end of the extruder being provided with a water cooled strand die, characterised in that: The water-cooled cutting die is provided downstream with a pipeline water-cooled conveying device, which comprises a pipeline support, a conveying pipe arranged on the pipeline support, an upstream end of the conveying pipe fixedly communicated with an end of the water-cooled cutting die of the extruder, a water inlet arranged on an upstream section of the conveying pipe, a water outlet arranged on a downstream section of the conveying pipe, the water inlet and the water outlet connected with a water circulating device, a discharge port arranged on a downstream end of the conveying pipe, and a guide conveying device arranged on the pipeline support at the discharge port to facilitate the traction of the elastomer strip.

2. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 1, wherein: The guide conveying device comprises a conveying frame, a lower guide roller rotatably arranged on the conveying frame, and a plurality of guide ring grooves arranged on the lower guide roller and corresponding to the position of the discharge port.

3. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 2, wherein: The conveying frame is provided with a portal frame, an upper roller frame is arranged on the portal frame, the upper roller frame is arranged on the portal frame through a vertical lifting adjusting mechanism, an upper guide roller is rotatably arranged 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 arranged on the upper guide roller.

4. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 3, wherein: The conveying pipe comprises an upstream horizontal pipe section, a vertical pipe section and a downstream horizontal pipe section, which are sequentially connected through elbows, the upstream horizontal pipe section is fixedly communicated with the end of the water-cooled cutting die, the water inlet is arranged on the upstream horizontal pipe section and close to the water-cooled cutting die, and the water outlet is arranged on the vertical pipe section.

5. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 1, wherein: The water-cooled cutting die comprises a die body, a die cavity is arranged on the die body, an electric heating device is arranged on the outside of the die body, a die plate is detachably fixed to the downstream end of the die body, a plurality of mounting holes are arranged on the die plate, a ceramic isolation sleeve is arranged on the die plate, a ceramic inner sleeve is arranged in the mounting hole of the die plate, an inner hole of the ceramic inner sleeve constitutes an extrusion hole, and the conveying pipe is fixedly connected with the die plate.

6. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 5, wherein: The ceramic isolation sleeve comprises an isolation plate part, the ceramic inner sleeve is arranged on the downstream plate surface of the isolation plate part, and the isolation plate part is attached to the die plate and pre-pressed between the die body and the die plate.

7. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 6, wherein: The mounting hole is a tapered mounting hole, and correspondingly, the ceramic inner sleeve is also a tapered ceramic inner sleeve.

8. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 7, wherein: A ceramic isolation gasket is further 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 tightly fixed, and the isolation gasket tightly presses the isolation plate part.

9. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 7, wherein: The die plate comprises a die mounting plate, the die mounting plate is fixed between the die body, a die embedding hole is arranged at the center of the die mounting plate, the die embedding hole is arranged as a stepped hole, a limiting stepped surface is arranged on the die mounting plate and matched with the stepped hole, a die body is embedded in the die embedding hole, and the mounting hole is arranged on the die body.

10. An apparatus for extruding and pelletizing a high flow elastomer as defined in claim 5, wherein: The ceramic isolation sleeve is of split structure, and the number of the ceramic isolation sleeves is multiple, each ceramic isolation sleeve comprises one ceramic inner sleeve, the upstream end of the ceramic inner sleeve is provided with a flange plate, and the upstream plate surface of the die plate is further provided with a sink groove matched with the flange plate.

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