High-temperature continuous extrusion equipment for laminating coated paper

Abstract

The invention relates to high-temperature continuous extrusion equipment for lamination paper compounding, which comprises a screw feeding barrel and a lamination head communicated with the discharge end of the screw feeding barrel, and a filter screen replacement device positioned at the discharge end of the screw feeding barrel is arranged between the screw feeding barrel and the lamination head. The filter screen replacement device comprises a feeding sleeve connected between the screw feeding barrel and the laminating head, and a replacement channel formed in the feeding sleeve; the filter screens are driven by a driving mechanism to be movably connected into the replacement channel and arranged corresponding to the feeding sleeve, and the flexible sealing rings are arranged on the outer sides of the filter screens, surround the feeding sleeve by a circle and make extrusion contact with the inner wall of the replacement channel.

Description

Technical Field

[0001] The invention relates to film coating extrusion equipment, in particular to a high-temperature continuous extrusion equipment for laminating film paper. Background Art

[0002] The main feature of laminated paper is that this composite material is oil-proof, waterproof and heat-sealed. When making laminated paper, the plastic is usually melted through a high-temperature extrusion device and then linearly extruded onto the rolling paper surface through an extrusion laminating head, and then a layer of molten plastic is compounded on the paper surface, so that the compounded paper presents certain characteristics. In the existing laminated paper extrusion equipment, since the extrusion equipment needs to heat and melt the plastic, it is necessary to continuously ensure the high temperature of the extrusion screw, and in order to avoid the need to reheat the screw of the extrusion equipment after shutdown, the extrusion equipment is usually made to work continuously for a long time. When the existing extrusion equipment heats and extrudes the plastic, due to the unavoidable presence of some impurities in the plastic principle, it is necessary to filter the impurities that cannot be melted and the unmelted raw materials during the screw heating and extrusion process to avoid large particles from entering the laminating head and causing blockage of the laminating head. The above problems need to be avoided in the prior art to ensure that the extrusion equipment can work continuously for a long time. Summary of the invention

[0003] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a high-temperature continuous extrusion equipment for laminated paper composite, which can filter impurities and unmelted raw materials through the filter screen and quickly replace the clogged filter screen, thereby ensuring that the extrusion equipment can work for a long time.

[0004] The present invention solves its technical problems by adopting a technical solution: a high-temperature continuous extrusion device for laminated paper composite comprises a screw feeding barrel and a laminating head connected to the discharge end of the screw feeding barrel, a pair of filters located on the discharge end of the screw feeding barrel and a filter replacement device arranged on the outside of the filter and driven by a driving mechanism to replace and move the filter are arranged between the screw feeding barrel and the laminating head, the filter replacement device comprises a feeding sleeve connected between the screw feeding barrel and the laminating head and a replacement channel opened on the feeding sleeve; the filter is movably connected in the replacement channel, and a filter sleeve surrounding the feeding sleeve is arranged on the outside of the filter. A flexible sealing ring is arranged around the filter and is in extrusion contact with the inner wall of the replacement channel; the flexible sealing ring includes an inner fixed part arranged around the filter, an outer movable part arranged outside the inner fixed part and spaced apart from the inner fixed part, and an inner elastic deformation sheet arranged outside the filter and connected between the inner fixed part and the outer movable part. A filter and a filter replacement device for driving the filter to be replaced are provided, so that the molten raw material extruded in the screw feeding barrel can be filtered while the blocked filter can be replaced alternately and quickly, so that the extrusion equipment can work for a long time without stopping.

[0005] Preferably, the filter screen comprises a filter disc having a plurality of evenly arranged filter holes and arranged corresponding to the feeding sleeve, and a sealing ring support plate arranged outside the filter disc for installing a flexible sealing ring, and the filter disc and the sealing ring support plate are arranged as one body.

[0006] Preferably, the inner fixed part is fixedly connected to the outer side of the sealing ring support plate and is arranged around the filter disc, the inner elastic deformation sheet is arranged on the outer side of the filter disc, the inner side of the inner elastic deformation sheet is connected to the inner circle of the inner fixed part, the outer side of the inner elastic deformation sheet is connected to the inner circle of the outer movable part, the middle end of the inner elastic deformation sheet protrudes toward the center of the filter disc and forms a deformation space between the inner and outer sides of the inner elastic deformation sheet, and an extrusion protrusion protruding toward the inner side of the replacement channel and corresponding to the outer movable part is provided in the feeding sleeve; the extrusion protrusion presses the outer movable part inwardly so that the inner elastic deformation sheet deforms outwardly and contacts and seals with the inner wall of the replacement channel.

[0007] Preferably, the internal elastic deformation plate includes a first hard connecting plate connected to the internal fixed part and arranged on the outer wall of the sealing ring support plate, a flexible connecting plate connected to the external movable part and the outer side of which is gradually bent in an arc shape toward the first hard connecting plate, and a second hard connecting plate connected to the outer end of the flexible connecting plate and arranged perpendicular to the first hard connecting plate.

[0008] Preferably, an outer elastic deformation sheet arranged around the outer movable part is provided on a side of the outer movable part away from the inner elastic deformation sheet, the outer elastic deformation sheet is arranged in a ring shape and is gradually inclined and bent toward the sealing ring support plate from the inside to the outside, the outer ring of the outer elastic deformation sheet is provided with a hard positioning part arranged perpendicular to the sealing ring support plate, and a side of the hard positioning part close to the sealing ring support plate is provided with an anti-slip support surface parallel to the outer side surface of the sealing ring support plate and spaced apart from the outer side surface of the sealing ring support plate; when in use, the extrusion protrusion squeezes the outer movable part toward one side of the sealing ring support plate, and the anti-slip support surface contacts the outer side surface of the sealing ring support plate, so that the outer elastic deformation sheet deforms outward and contacts the inner wall of the replacement channel for sealing.

[0009] Preferably, a replacement channel is arranged through the feeding sleeve up and down, a pair of filters are provided upper and lower and are arranged at intervals on the same vertical plane, a positioning frame is movably connected to the inner side of the replacement channel and is sleeved on the outer sides of the upper and lower filters, a guide frame is provided on the outer side of the positioning frame and is fixedly connected to the feeding sleeve, guide rails are provided on the left and right sides of the positioning frame and are opened in the guide frame, a driving cylinder is provided on the guide frame, the piston end of the driving cylinder passes through the guide bracket and is fixedly connected to the positioning frame, the piston end of the driving cylinder drives the positioning frame and the filter on the positioning frame to move up and down, and then the filter on the outer side of the feeding sleeve is inserted into the replacement channel of the feeding sleeve to replace the original filter in the feeding sleeve.

[0010] Preferably, a taking channel horizontally arranged relative to the filter screen is opened at the left end of the positioning frame, and a taking outlet corresponding to the taking channel is opened at the side of the guide bracket.

[0011] Preferably, cleaning channels corresponding to the filter disc are provided on the front and rear sides of the guide bracket, and the left and right limit positions of the cleaning channels are arranged outside the flexible sealing ring.

[0012] Preferably, the extrusion protrusion is arranged in a hemispherical structure, and an extended support portion fixedly connected to the inner wall of the replacement channel is provided on the extrusion protrusion; the extrusion protrusion arranged on the extended support portion presses the outer movable portion inwardly against the outer surface of the inner fixed portion, so that the inner elastic deformation sheet deforms outwardly and contacts and seals with the inner wall of the replacement channel, and at the same time, the deformation space is surrounded to form a sealed space.

[0013] Preferably, a pair of auxiliary elastic sealing sheets fixedly connected to the outer surface of the hard positioning portion are arranged between the hard positioning portion and the sealing ring support plate, and the auxiliary elastic sealing sheet is arranged in contact with the outer side surface of the sealing ring support plate on the side away from the hard positioning portion, and the auxiliary elastic sealing sheet includes an arc-shaped guide portion fixedly connected to the hard positioning portion at one end and an arc-shaped contact portion connected to the other end of the arc-shaped guide portion, the arc-shaped guide portion is gradually bent from the inside to the outside toward the center of the hard positioning portion, and the arc-shaped contact portion is gradually bent from the inside to the outside toward the side away from the center of the hard positioning portion.

[0014] The beneficial effect of the present invention is that: the present invention is provided with a filter screen and a filter screen replacement device located on the discharge end of the screw feeding barrel, and an inner fixed part installed on the outer side of the filter screen, an outer movable part arranged on the outer side of the inner fixed part, and an inner elastic deformation sheet connected between the inner fixed part and the outer movable part are arranged on the outer side of the filter screen, so that while realizing the filtering function, the filter screen can also be quickly replaced by the filter screen replacement device, thereby ensuring that the extrusion equipment can work for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the filter replacement device; Figure 3 A top view of the filter replacement device; Figure 4 This is a view of the filter replacement device in the EE direction; Figure 5 for Figure 4 A magnified view of part A; Figure 6 for Figure 4 A magnified view of part B; Figure 7 A view of the filter replacement device provided with an extended support portion in the EE direction; Figure 8 for Figure 7 Enlarged view of part C; Fig. 9 for Figure 7 A magnified view of part D in the middle; Fig.10 This is a schematic diagram of the installation of the positioning frame and the filter; Fig.11 is a cross-sectional view of a flexible sealing ring; Fig.12 for Fig.11 Enlarged view of part F.

[0016] Description of the accompanying drawings: 1. screw feeding barrel, 2. coating head, 3. filter screen replacement device, 3-1. feeding sleeve, 3-2. replacement channel, 3-3. filter screen, 3-3-1. filter hole, 3-3-2. filter disc, 3-3-3. sealing ring support plate, 4. flexible sealing ring, 4-1. inner fixed part, 4-2. outer movable part, 4-3. inner elastic deformation plate, 4-3-1. first hard connecting plate, 4-3-2. flexible connecting plate, 4-3-3, second hard connecting plate, 5, deformation space, 6, extrusion protrusion, 7, external elastic deformation plate, 8, hard positioning portion, 9, anti-slip support surface, 10, extended support portion, 11, positioning frame, 12, guide bracket, 13, guide rail, 14, driving cylinder, 15, taking channel, 16, taking outlet, 17, cleaning channel, 18, auxiliary elastic sealing plate, 18-1, arc-shaped guide portion, 18-2, arc-shaped contact portion. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] See attached Figure 1 As shown: This embodiment discloses a high-temperature continuous extrusion device for laminated paper composite, including a screw feeding barrel 1 and a laminating head 2 connected to the discharge end of the screw feeding barrel 1; when the existing laminating extrusion device is in use, the laminating raw material is added into the screw feeding barrel 1, the raw material is heated and melted by the screw feeding barrel 1, and the melted raw material is transported to one side of the laminating head 2 and dripped onto the moving paper below through the laminating head 2 to perform laminated paper composite.

[0019] See attached Figure 1 and 2As shown, a pair of filters 3-3 located on the discharge end of the screw feeding barrel 1 and a filter replacement device 3 arranged on the outside of the filter 3-3 and driven by a driving mechanism to replace and move the filter 3-3 are arranged between the screw feeding barrel 1 and the laminating head 2; the filter replacement device 3 includes a feeding sleeve 3-1 connected between the screw feeding barrel 1 and the laminating head 2 and a replacement channel 3-2 opened on the feeding sleeve 3-1; the filter 3-3 is movably connected in the replacement channel 3-2, and a flexible sealing ring 4 is arranged on the outside of the filter 3-3, which surrounds the feeding sleeve 3-1 and is in compression contact with the inner wall of the replacement channel 3-2; wherein the feeding sleeve 3-1 in this embodiment is a tubular structure with a channel on the inside; specifically, as Figure 2 and Figure 4 As shown, the filter screen 3-3 includes a filter disc 3-3-2 with a plurality of evenly arranged filter holes 3-3-1 and corresponding to the feeding sleeve 3-1, and a sealing ring support plate 3-3-3 arranged on the outside of the filter disc 3-3-2 for installing a flexible sealing ring 4. The filter disc 3-3-2 and the sealing ring support plate 3-3-3 in this embodiment are integrated; wherein the filter disc 3-3-2 and the sealing ring support plate 3-3-3 are both made of hard and high-temperature resistant materials, and the filter disc 3-3-2 is a circular plate structure and is corresponding to the channel in the feeding sleeve 3-1. When in use, the filter screen replacement device 3 filters the molten raw material transported by the screw feeding barrel 1 to the laminating head 2 to avoid blockage of the laminating head 2. At the same time, the basic equipment in this embodiment can quickly replace the filter screen 3-3 during long-term use, thereby ensuring the continuous extrusion of the laminating machine extrusion equipment.

[0020] Specifically, Figure 2 As shown, the filter replacement device 3 in this embodiment is connected to the screw feeding barrel 1 and the coating head 2 respectively through the feeding sleeve 3-1, and then the screw feeding barrel 1 and the coating head 2 are connected through the feeding sleeve 3-1; when the filter replacement device 3 in this embodiment is in use, the filter 3-3 is movably arranged in the replacement channel 3-2, and one of the filters 3-3 corresponds to the inner channel of the feeding sleeve 3-1 and covers the inner channel of the feeding sleeve 3-1. When the filter 3-3 needs to be replaced, the driving mechanism drives the filter 3-3 to move in the replacement channel 3-2, so that the filter 3-3 in the feeding sleeve 3-1 is moved out of the feeding sleeve 3-1 along the replacement channel 3-2, and at the same time, another filter 3-3 is moved to the feeding sleeve 3-1 to replace the filter 3-3 in the original position, thereby ensuring smooth transportation between the screw feeding barrel 1 and the coating head 2 and ensuring the normal flow rate of raw materials.

[0021] Furthermore, in order to ensure smooth movement of the filter 3-3, as Figure 4 and Fig.10As shown, the replacement channel 3-2 in this embodiment is arranged to pass through the feeding sleeve 3-1 from top to bottom, wherein the filter screen 3-3 in this embodiment is provided with a pair of upper and lower ones and is arranged at intervals on the same vertical plane, and the inner side of the replacement channel 3-2 is movably connected with a positioning frame 11 sleeved on the outer sides of the upper and lower filter screens 3-3; specifically, the positioning frame 11 in this embodiment is a rectangular plate-shaped structure, and the positioning frame 11 is provided with upper and lower mounting cavities for placing the upper and lower filter screens 3-3, and the upper and lower mounting cavities are arranged at intervals by partitions; and the outer side of the positioning frame 11 is provided with a guide fixedly connected to the feeding sleeve 3-1 To the bracket 12, the left and right sides of the positioning frame 11 are provided with guide rails 13 opened in the guide bracket 12, and the guide bracket 12 is provided with a driving cylinder 14, and the piston end of the driving cylinder 14 passes through the guide bracket 12 and is fixedly connected with the positioning frame 11; when it is necessary to replace the filter 3-3, the piston end of the driving cylinder 14 drives the positioning frame 11 and the filter 3-3 on the positioning frame 11 to move up and down, and then the filter 3-3 on the outside of the feeding sleeve 3-1 is inserted into the replacement channel 3-2 of the feeding sleeve 3-1 to replace the original filter 3-3 in the feeding sleeve 3-1.

[0022] Furthermore, in order to ensure the sealing of the filter 3-3 on the filter replacement device 3 and prevent the melted raw material from leaking out of the replacement channel 3-2, as shown in FIG. Figure 5 and Fig.11 As shown, the flexible sealing ring 4 in this embodiment includes an inner fixed portion 4-1 arranged around the filter disc 3-3-2 and fixedly connected to the outer side of the sealing ring support plate 3-3-3, an outer movable portion 4-2 arranged on the outer side of the inner fixed portion 4-1 and spaced from the inner fixed portion 4-1, and an inner elastic deformation piece 4-3 arranged on the outer side of the filter disc 3-3-2. The inner fixed portion 4-1 and the outer movable portion 4-2 in this embodiment are made of hard and high temperature resistant materials, and the inner fixed portion 4-1 and the outer movable portion 4-2 are both arranged in a circular ring structure; wherein the inner elastic deformation piece 4-3 is made of a high temperature resistant flexible material, and the inner side of the inner elastic deformation piece 4-3 is in contact with the inner fixed portion 4 -1 is fixedly connected with the inner ring of the filter disc 3-3-2, and the outer side of the inner elastic deformation sheet 4-3 is connected with the inner ring of the outer movable part 4-2, so that the inner elastic deformation sheet 4-3 is also arranged in a ring shape; specifically, the middle end of the inner elastic deformation sheet 4-3 protrudes toward the center of the filter disc 3-3-2 and forms a deformation space 5 between the inner and outer sides of the inner elastic deformation sheet 4-3, and the feeding sleeve 3-1 is provided with an extrusion protrusion 6 protruding toward the inner side of the replacement channel 3-2 and arranged corresponding to the outer movable part 4-2; and then when the filter disc 3-3-2 is installed in place, the extrusion protrusion 6 presses the outer movable part 4-2 inwardly, so that the inner elastic deformation sheet 4-3 is deformed outwardly and contacts and seals with the inner wall of the replacement channel 3-2.

[0023] Furthermore, Figure 5 and Figure 6As shown, in order to prevent the inner elastic deformation sheet 4-3 from being excessively deformed when being replaced and moved in the replacement channel 3-2, in this embodiment, the inner elastic deformation sheet 4-3 includes a first hard connection sheet 4-3-1 connected to the inner fixed portion 4-1 and attached to the outer wall of the sealing ring support plate 3-3-3, a flexible connection sheet 4-3-2 connected to the outer movable portion 4-2 and gradually bent toward the first hard connection sheet 4-3-1 in an arc shape, and a second hard connection sheet 4-3-3 connected to the outer end of the flexible connection sheet 4-3-2 and perpendicular to the first hard connection sheet 4-3-1. It is gradually bent in an arc shape toward the first hard connecting piece 4-3-1, so that in the present embodiment, during the process of replacing and moving the filter screen 3-3, only the outer hard outer movable part 4-2 contacts the inner wall of the replacement channel 3-2, thereby avoiding the flexible connecting piece 4-3-2 from contacting the inner wall of the replacement channel 3-2 during the replacement and movement process, avoiding deformation caused by contact with the inner wall when the flexible connecting piece 4-3-2 moves, and also reducing the friction between the flexible connecting piece 4-3-2 and the inner wall of the replacement channel 3-2 during the replacement and movement process, thereby extending the service life of the flexible sealing ring 4 and ensuring that the replaced flexible sealing ring 4 can achieve effective sealing; refer to the attached Fig.12 As shown, in this embodiment, a first hard connecting piece 4-3-1 connected to the inner fixed part 4-1 and a second hard connecting piece 4-3-3 arranged perpendicular to the first hard connecting piece 4-3-1 are provided, so that when the inner elastic deformation piece 4-3 moves up and down with the filter screen 3-3, when the friction force exerted on the outer movable part 4-2 generates a force in the corresponding direction, the corresponding force can be transmitted to the second hard connecting piece 4-3-3 and the first hard connecting piece 4-3-1, thereby preventing the outer movable part 4-2 from driving the flexible connecting piece 4-3-2 to move in the corresponding direction under the action of the friction force.

[0024] Furthermore, Figure 5 , Figure 6 and Fig.12As shown, in order to facilitate the extrusion of the protrusion 6 on the outer movable part 4-2 when replacing the filter screen 3-3 and further increase the sealing effect between the filter screen 3-3 and the feeding sleeve 3-1, in this embodiment, an outer elastic deformation sheet 7 arranged around the outer movable part 4-2 is provided on the side of the outer movable part 4-2 away from the inner elastic deformation sheet 4-3; wherein the outer elastic deformation sheet 7 is also correspondingly arranged in an annular shape and is gradually inclined and bent from the inside to the outside toward the sealing ring support plate 3-3-3, wherein the outer ring of the outer elastic deformation sheet 7 is provided with a vertical sealing ring support plate 3-3-3 A hard positioning portion 8 is disposed, and a non-slip support surface 9 is provided on the side of the hard positioning portion 8 close to the sealing ring support plate 3-3-3, which is parallel to the outer side surface of the sealing ring support plate 3-3-3 and spaced apart from the outer side surface of the sealing ring support plate 3-3-3; when the filter screen 3-3 is replaced and used, the extrusion protrusion 6 squeezes the outer movable portion 4-2 toward the side of the sealing ring support plate 3-3-3, and the non-slip support surface 9 contacts the outer side surface of the sealing ring support plate 3-3-3, so that the outer elastic deformation sheet 7 is also deformed toward the inner wall of the replacement channel 3-2 and contacts and seals with the inner wall of the replacement channel 3-2.

[0025] Furthermore, Figure 7 , Figure 8 and Fig. 9 As shown, in order to further enhance the sealing performance of the filter screen 3-3 when in use, the extrusion protrusion 6 in the present embodiment is arranged in a hemispherical structure, and the spherical surface of the extrusion protrusion 6 is arranged toward the side of the outer movable part 4-2 and is used to contact and extrude with the outer movable part 4-2, and the extrusion protrusion 6 in the present embodiment is provided with an extended support portion 10 fixedly connected to the inner wall of the replacement channel 3-2, thereby increasing the extrusion distance of the extrusion protrusion 6 on the outer movable part 4-2 through the extended support portion 10, and the extended support portion 10 in the present embodiment can be made of a high temperature resistant hard rubber material; specifically, the extrusion protrusion 6 arranged on the extended support portion 10 presses the outer movable part 4-2 inward and makes the outer movable part 4-2 contact the outer movable part 4-2 arranged on the inner fixed support portion 10. Similarly, the outer surface of the fixed part 4-1 makes the inner elastic deformation sheet 4-3 and the outer elastic deformation sheet 7 deform outwards to contact and seal with the inner wall of the replacement channel 3-2, and at the same time, the deformation space 5 is surrounded to form a sealed space, so that when the inner elastic deformation sheet 4-3 is in use, since the deformation space 5 is relatively sealed and there is a certain amount of gas in the deformation space 5, when the deformed inner elastic deformation sheet 4-3 is squeezed by the molten raw material in the feeding sleeve 3-1, the gas in the deformation space 5 is compressed and will further squeeze the inner elastic deformation sheet 4-3 outwards, so that the flexible connecting sheet 4-3-2 is more closely attached to the inner wall of the replacement channel 3-2, thereby ensuring that the filter screen 3-3 has a better sealing effect when in use; on the basis of the above structure, further, as Fig.11 and Fig.12As shown, a pair of auxiliary elastic sealing sheets 18 fixedly connected to the outer surface of the hard positioning portion 8 are arranged between the hard positioning portion 8 and the sealing ring support plate 3-3-3 in this embodiment. The auxiliary elastic sealing sheet 18 is arranged in contact with the outer side surface of the sealing ring support plate 3-3-3 on one side away from the hard positioning portion 8. The auxiliary elastic sealing sheet 18 includes an arc-shaped guide portion 18-1 fixedly connected to the hard positioning portion 8 at one end and an arc-shaped contact portion 18-2 connected to the other end of the arc-shaped guide portion 18-1. The arc-shaped guide portion 18-1 gradually extends from the inside to the outside toward the hard positioning portion 8. The center of the rigid positioning part 8 is bent, and the arc-shaped contact part 18-2 is bent from the inside to the outside gradually toward the side away from the center of the rigid positioning part 8; when the filter screen 3-3 is replaced and used, the extrusion protrusion 6 squeezes the outer movable part 4-2 toward the inner fixed part 4-1, firstly, the auxiliary elastic sealing sheet 18 on the rigid positioning part 8 is pressed and fitted on the outer surface of the sealing ring support plate 3-3-3, and then the inner elastic deformation sheet 4-3, the outer elastic deformation sheet 7 and the outer surface of the sealing ring support plate 3-3-3 are surrounded to form a relatively sealed space, and then when the extrusion protrusion 6 further squeezes the outer movable part 4-2 to contact the outer surface of the inner fixed part 4-1, the air pressure in the sealed space is relatively increased, such as Fig.12 As shown, since the arc-shaped guide portion 18-1 on the auxiliary elastic sealing sheet 18 of the inner ring is gradually bent from the inside to the outside toward the center of the hard positioning portion 8, the corresponding arc-shaped contact portion 18-2 is gradually bent from the inside to the outside toward the side away from the center of the hard positioning portion 8, thereby increasing the contact area and contact pressure between the arc-shaped contact portion 18-2 and the outer surface of the sealing ring support plate 3-3-3 when the air pressure increases, thereby further improving the sealing effect of the flexible sealing ring 4.

[0026] Further, such as Figure 2 and Figure 4 As shown, the guide bracket 12 is provided with cleaning channels 17 corresponding to the filter 3-3-2 on both sides, and the left and right sides of the cleaning channel 17 are limitedly arranged outside the flexible sealing ring 4, so that the filter 3-3 can be cleaned through the cleaning channel 17; further, as Figure 4 and Fig.10 As shown, in order to facilitate the removal and cleaning of the filter 3-3 in the positioning frame 11, a removal channel 15 horizontally arranged relative to the filter 3-3 is opened at the left end of the positioning frame 11 in this embodiment, and a removal outlet 16 corresponding to the removal channel 15 is opened on the side of the guide bracket 12. When in use, the upper filter 3-3 moves downward under the action of the driving cylinder 14 to replace the lower filter 3-3, thereby making the lower filter 3-3 detached from the inner channel of the feeding sleeve 3-1, and the replaced filter 3-3 can be moved from left to right and taken out from the removal channel 15 and the removal outlet 16, so that it is more convenient to clean the replaced filter 3-3.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-temperature continuous extrusion device for laminating coated paper, comprising a screw feeding barrel (1) and a laminating head (2) connected to the discharge end of the screw feeding barrel (1), wherein: A pair of filter screens (3-3) located at the discharge end of the screw feeding barrel (1) and a filter screen replacement device (3) arranged outside the filter screen (3-3) and driven by a driving mechanism to replace and move the filter screen (3-3) are arranged between the screw feeding barrel (1) and the laminating head (2). The filter screen replacement device (3) comprises a feeding sleeve (3-1) connected between the screw feeding barrel (1) and the laminating head (2) and a replacement channel (3-2) opened on the feeding sleeve (3-1); the filter screen (3-3) is movably connected to the replacement channel (3-2). A flexible sealing ring (4) is arranged on the outside of the filter screen (3-3) and surrounds the feeding sleeve (3-1) and is in compression contact with the inner wall of the replacement channel (3-2); the flexible sealing ring (4) comprises an inner fixed portion (4-1) arranged around the filter screen (3-3), an outer movable portion (4-2) arranged on the outside of the inner fixed portion (4-1) and spaced from the inner fixed portion (4-1), and an inner elastic deformation sheet (4-3) arranged on the outside of the filter screen (3-3) and connected between the inner fixed portion (4-1) and the outer movable portion (4-2).

2. The high temperature continuous extrusion equipment for laminated paper according to claim 1, characterized in that: The filter screen (3-3) comprises a filter disc (3-3-2) provided with a plurality of evenly arranged filter holes (3-3-1) and arranged corresponding to the feeding sleeve (3-1), and a sealing ring support plate (3-3-3) arranged outside the filter disc (3-3-2) for mounting a flexible sealing ring (4).

3. The high temperature continuous extrusion equipment for laminated paper according to claim 2, characterized in that: The inner fixed portion (4-1) is fixedly connected to the outer side of the sealing ring support plate (3-3-3) and is arranged around the filter disc (3-3-2); the inner elastic deformation sheet (4-3) is arranged on the outer side of the filter disc (3-3-2); the inner side of the inner elastic deformation sheet (4-3) is connected to the inner circle of the inner fixed portion (4-1); the outer side of the inner elastic deformation sheet (4-3) is connected to the inner circle of the outer movable portion (4-2); the middle end of the inner elastic deformation sheet (4-3) protrudes toward the center of the filter disc (3-3-2) and forms a deformation space (5) between the inner and outer sides of the inner elastic deformation sheet (4-3); the feeding sleeve (3-1) is provided with an extrusion protrusion (6) protruding toward the inner side of the replacement channel (3-2) and arranged corresponding to the outer movable portion (4-2); the extrusion protrusion (6) presses the outer movable portion (4-2) inwardly so that the inner elastic deformation sheet (4-3) is deformed outwardly and contacts and seals with the inner wall of the replacement channel (3-2).

4. The high-temperature continuous extrusion equipment for laminated paper according to claim 3 is characterized by: The inner elastic deformation sheet (4-3) comprises a first hard connection sheet (4-3-1) connected to the inner fixed portion (4-1) and arranged to fit on the outer wall of the sealing ring support plate (3-3-3), a flexible connection sheet (4-3-2) connected to the outer movable portion (4-2) and arranged with the outer side gradually bent in an arc shape toward the first hard connection sheet (4-3-1), and a second hard connection sheet (4-3-3) connected to the outer end of the flexible connection sheet (4-3-2) and arranged perpendicular to the first hard connection sheet.

5. The high temperature continuous extrusion equipment for laminated paper according to claim 3 or 4, characterized in that: An outer elastic deformation sheet (7) arranged around the outer movable part (4-2) is provided on a side of the outer movable part (4-2) away from the inner elastic deformation sheet (4-3); the outer elastic deformation sheet (7) is arranged in an annular shape and is gradually inclined and bent from the inside to the outside toward the sealing ring support plate (3-3-3); the outer ring of the outer elastic deformation sheet (7) is provided with a hard positioning part (8) arranged perpendicular to the sealing ring support plate (3-3-3); the hard positioning part (8) is close to the sealing ring support plate (3-3 -3) is provided with an anti-slip support surface (9) which is parallel to the outer side surface of the sealing ring support plate (3-3-3) and is spaced apart from the outer side surface of the sealing ring support plate (3-3-3); when in use, the extrusion protrusion (6) presses the outer movable portion (4-2) toward one side of the sealing ring support plate (3-3-3), and the anti-slip support surface (9) contacts the outer side surface of the sealing ring support plate (3-3-3), so that the outer elastic deformation sheet (7) deforms outwards and contacts and seals with the inner wall of the replacement channel (3-2).

6. The high temperature continuous extrusion equipment for laminated paper according to claim 2, characterized in that: The replacement channel (3-2) is arranged to penetrate the feeding sleeve (3-1) from top to bottom, and the filter screen (3-3) is provided with a pair of upper and lower ones and is arranged at intervals on the same vertical plane. The inner side of the replacement channel (3-2) is movably connected to a positioning frame (11) sleeved on the outer side of the upper and lower filter screens (3-3). The outer side of the positioning frame (11) is provided with a guide bracket (12) fixedly connected to the feeding sleeve (3-1). The left and right sides of the positioning frame (11) are provided with guide rails (13) opened in the guide bracket (12). The guide bracket (12) is provided with a driving cylinder (14), and the piston end of the driving cylinder (14) passes through the guide bracket (12) and is fixedly connected to the positioning bracket (11). The piston end of the driving cylinder (14) drives the positioning bracket (11) and the filter screen (3-3) on the positioning bracket (11) to move up and down, thereby inserting the filter screen (3-3) outside the feeding sleeve (3-1) into the replacement channel (3-2) of the feeding sleeve (3-1) to replace the original filter screen (3-3) in the feeding sleeve (3-1).

7. The high temperature continuous extrusion equipment for laminated paper according to claim 6, characterized in that: The left end of the positioning frame (11) is provided with a taking passage (15) arranged horizontally relative to the filter screen (3-3), and the side of the guide bracket (12) is provided with a taking outlet (16) arranged corresponding to the taking passage (15).

8. The high-temperature continuous extrusion equipment for laminated paper according to claim 6, characterized in that: Cleaning channels (17) corresponding to the filter disc (3-3-2) are provided on the front and rear sides of the guide bracket (12), and the left and right sides of the cleaning channel (17) are limitedly arranged outside the flexible sealing ring (4).

9. The high-temperature continuous extrusion equipment for laminated paper according to claim 5, characterized in that: The extrusion protrusion (6) is arranged in a hemispherical structure, and an extension support portion (10) fixedly connected to the inner wall of the replacement channel (3-2) is arranged on the extrusion protrusion (6); the extrusion protrusion (6) arranged on the extension support portion (10) presses the outer movable portion (4-2) inwardly against the outer surface of the inner fixed portion (4-1), so that the inner elastic deformation sheet (4-3) deforms outwardly to contact and seal with the inner wall of the replacement channel (3-2), and at the same time, the deformation space (5) is surrounded on all sides to form a sealed space.

10. The high temperature continuous extrusion equipment for laminated paper according to claim 5, characterized in that: A pair of auxiliary elastic sealing sheets (18) fixedly connected to the outer surface of the hard positioning portion (8) are arranged between the hard positioning portion (8) and the sealing ring support plate (3-3-3); the side of the auxiliary elastic sealing sheet (18) away from the hard positioning portion (8) is in contact with the outer side surface of the sealing ring support plate (3-3-3); the auxiliary elastic sealing sheet (18) comprises an arc-shaped guide portion (18-1) fixedly connected to the hard positioning portion (8) at one end and an arc-shaped contact portion (18-2) connected to the other end of the arc-shaped guide portion (18-1); the arc-shaped guide portion (18-1) is gradually bent from the inside to the outside toward the center of the hard positioning portion (8); and the arc-shaped contact portion (18-2) is gradually bent from the inside to the outside toward the side away from the center of the hard positioning portion (8).

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