High temperature continuous extrusion equipment for laminating coated paper

Abstract

The application relates to a high-temperature continuous extrusion device for laminating coated paper, which comprises a screw feeding cylinder and a coating head connected with the discharging end of the screw feeding cylinder, a filter screen replacing device is arranged between the screw feeding cylinder and the coating head and located on the discharging end of the screw feeding cylinder, the filter screen replacing device comprises a feeding sleeve connected between the screw feeding cylinder and the coating head, a replacing channel opened on the feeding sleeve, a pair of filter screens driven and movably connected in the replacing channel through a driving mechanism and correspondingly arranged with the feeding sleeve, and a flexible sealing ring arranged outside the filter screens, surrounds the feeding sleeve for one round and is extrudedly contacted with the inner wall of the replacing channel.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of high temperature continuous extrusion equipment for laminating film paper, and especially to a kind of high temperature continuous extrusion equipment for laminating film paper. BACKGROUND

[0002] The main feature of film paper is that the composite material can prevent oil, water, can be heat sealed; In the production of film paper, usually make plastic melt through high temperature extrusion equipment, then through extrusion film head linear extrusion on the surface of rolling paper, and then composite a layer of molten plastic on the surface of paper, so that the paper after compounding presents certain characteristics;In the existing film paper extrusion equipment, since the extrusion equipment needs to heat the plastic, it needs 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 usually works for a long time, and in the existing extrusion equipment, since there are some impurities in the plastic principle, the impurities and unmelting raw materials need to be filtered during the heating and extrusion process of the screw, to avoid large particles entering the film head and causing the blockage of the film head, and the existing technology needs to avoid the above problems to ensure that the extrusion equipment can work for a long time. SUMMARY

[0003] The present application solves the problems existing in the prior art, and provides a kind of high temperature continuous extrusion equipment for laminating film paper, which can filter impurities and unmelting raw materials through filter screen, and can quickly replace the blocked filter screen, so as to ensure that the extrusion equipment can work for a long time.

[0004] The technical scheme adopted by the present application to solve its technical problems: this kind of high temperature continuous extrusion equipment for laminating film paper, including screw feeding cylinder and film head connected with the discharge end of screw feeding cylinder, a pair of filter screen located on the discharge end of screw feeding cylinder and filter screen replacement device driven by driving mechanism to replace and move the filter screen outside the filter screen are arranged between the screw feeding cylinder and the film head, the filter screen replacement device includes feeding sleeve connected between the screw feeding cylinder and the film head, and replacement channel opened on the feeding sleeve;Filter screen is movably connected in the replacement channel, and flexible sealing ring is arranged outside the filter screen and in extrusion contact with the inner wall of the replacement channel;Flexible sealing ring includes inner fixed part arranged around filter screen, outer movable part arranged outside inner fixed part and spaced apart from inner fixed part, and inner elastic deformation piece arranged outside filter screen and connected between inner fixed part and outer movable part, filter screen and filter screen replacement device for replacing filter screen are provided, so that the melted raw materials extruded in the screw feeding cylinder can be filtered at the same time, and the blocked filter screen can be replaced quickly, so that the extrusion equipment can work for a long time without shutdown.

[0005] Preferably, the filter screen comprises a filter disc provided with a plurality of uniformly arranged filter holes and corresponding to the feeding sleeve, and a sealing ring support plate provided outside the filter disc for mounting a flexible sealing ring.

[0006] Preferably, the inner fixed part is fixedly connected outside the sealing ring support plate and surrounds the filter disc, the inner elastic deformation piece is arranged outside the filter disc, the inner side of the inner elastic deformation piece is connected with the inner ring of the inner fixed part, the outer side of the inner elastic deformation piece is connected with the inner ring of the outer movable part, the middle end of the inner elastic deformation piece protrudes towards the center of the filter disc and forms a deformation space between the inner and outer sides of the inner elastic deformation piece, and the feeding sleeve is provided with an extrusion protruding part protruding towards the inner side of the replacement channel and corresponding to the outer movable part; the extrusion protruding part presses the outer movable part inward to make the inner elastic deformation piece deform outward and contact and seal with the inner wall of the replacement channel.

[0007] Preferably, the inner elastic deformation piece comprises a first hard connecting piece connected with the inner fixed part and arranged in close contact with the outer wall of the sealing ring support plate, a flexible connecting piece connected with the outer movable part and gradually curved in an arc shape towards the first hard connecting piece on the outer side, and a second hard connecting piece connected with the outer end of the flexible connecting piece and arranged perpendicularly to the first hard connecting piece.

[0008] Preferably, the outer side of the outer movable part away from the inner elastic deformation piece is provided with an outer elastic deformation piece arranged around the outer movable part, the outer elastic deformation piece is arranged in a ring shape and gradually curved and inclined towards the sealing ring support plate from the inner side to the outer side, the outer ring of the outer elastic deformation piece is provided with a hard positioning part arranged perpendicularly to the sealing ring support plate, and the side of the hard positioning part close to the sealing ring support plate is provided with an anti-skid support surface arranged in parallel to and spaced apart from the outer side surface of the sealing ring support plate; in use, the extrusion protruding part extrudes the outer movable part towards one side of the sealing ring support plate, the anti-skid support surface contacts the outer side surface of the sealing ring support plate, so that the outer elastic deformation piece deforms outward and contacts and seals with the inner wall of the replacement channel.

[0009] Preferably, the replacement channel is arranged through the feeding sleeve from top to bottom, the filter screen is provided with a pair of filter screens arranged in parallel and spaced apart on the same vertical plane, the positioning frame is movably connected inside the replacement channel and sleeved outside the upper and lower filter screens, the positioning frame is provided with a guide bracket fixedly connected with the feeding sleeve on the outer side, the left and right sides of the positioning frame are provided with guide rails arranged in the guide bracket, and the guide bracket is provided with a driving oil cylinder, the piston end of the driving oil cylinder is fixedly connected with the positioning frame by penetrating through the guide bracket, the piston end of the driving oil cylinder drives the positioning frame and the filter screens on the positioning frame to move up and down, and then the filter screens outside the feeding sleeve are inserted into the replacement channel of the feeding sleeve for replacing the original filter screens in the feeding sleeve.

[0010] Preferably, the left end of the positioning frame is provided with a taking channel arranged horizontally relative to the filter screen, and the side edge of the guide support is provided with a taking outlet arranged correspondingly to the taking channel.

[0011] Preferably, the guide support is provided with cleaning channels arranged correspondingly to the filter screen on the front and back sides, and the left and right sides of the cleaning channels are limited to be arranged outside the flexible sealing ring.

[0012] Preferably, the extrusion protruding part is arranged in a hemispherical structure, and the extrusion protruding part is provided with an extension support part fixedly connected to the inner wall of the replacement channel; the extrusion protruding part arranged on the extension support part presses the outer movable part inward on the outer surface of the inner fixed part, so that the inner elastic deformation piece deforms outward to contact and seal the inner wall of the replacement channel, and at the same time, the deformation space around the inner elastic deformation piece forms a sealed space.

[0013] Preferably, a pair of auxiliary elastic sealing pieces are arranged between the hard positioning part and the sealing ring support plate, and the auxiliary elastic sealing pieces are fixedly connected to the outer surface of the hard positioning part; the side of the auxiliary elastic sealing piece away from the hard positioning part is in contact with the outer side of the sealing ring support plate; the auxiliary elastic sealing piece comprises an arc-shaped guide part fixedly connected to one end of the hard positioning part and an arc-shaped contact part connected to the other end of the arc-shaped guide part; the arc-shaped guide part is arranged to bend gradually from inside to outside towards the center of the hard positioning part; and the arc-shaped contact part is arranged to bend gradually from inside to outside towards the side away from the center of the hard positioning part.

[0014] The present application has the beneficial effects that: the filter screen and the filter screen replacement device arranged on the discharge end of the screw feeding cylinder are provided, and the inner fixed part arranged outside the filter screen, the outer movable part arranged outside the inner fixed part, and the inner elastic deformation piece connected between the inner fixed part and the outer movable part are arranged outside the filter screen, so that the filter function is realized, and the filter screen can be quickly replaced through the filter screen replacement device, thereby ensuring that the extrusion equipment can work for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present application;

[0016] Figure 2 It is a structural schematic diagram of the filter screen replacement device;

[0017] Figure 3 It is a top view of the filter screen replacement device;

[0018] Figure 4 It is a view of the filter screen replacement device in the E-E direction;

[0019] Figure 5 It is Figure 4 It is an enlarged view of part A in the middle;

[0020] Figure 6 It is Figure 4Enlarged view of middle B part;

[0021] Figure 7 View of the filter screen replacement device provided with the extension support part in the E-E direction;

[0022] Figure 8 For Figure 7 Enlarged view of middle C part;

[0023] Figure 9 For Figure 7 Enlarged view of middle D part;

[0024] Figure 10 Schematic view of the installation of the positioning frame and the filter screen;

[0025] Figure 11 Cross-sectional view of the flexible sealing ring;

[0026] Figure 12 For Figure 11 Enlarged view of middle F part.

[0027] Explanation of reference signs: 1, screw feeding cylinder, 2, film 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 piece, 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 piece, 4-3-1, first hard connecting piece, 4-3-2, flexible connecting piece, 4-3-3, second hard connecting piece, 5, deformation space, 6, extrusion protruding part, 7, outer elastic deformation piece, 8, hard positioning part, 9, anti-skid support surface, 10, extension support part, 11, positioning frame, 12, guide support, 13, guide rail, 14, driving oil cylinder, 15, taking channel, 16, taking outlet, 17, cleaning channel, 18, auxiliary elastic sealing piece, 18-1, arc-shaped guide part, 18-2, arc-shaped contact part. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0029] Referring to the drawings Figure 1 As shown in the drawings: a high-temperature continuous extrusion equipment for laminating film-coated paper is disclosed in the present embodiment, which comprises a screw feeding cylinder 1 and a film coating head 2 connected in communication with the discharging end of the screw feeding cylinder 1. In use of the existing film-coating extrusion equipment, film-coating raw materials are added into the screw feeding cylinder 1, the raw materials are heated and melted by the screw feeding cylinder 1, and the melted raw materials are transported to one side of the film coating head 2 and dropped on the paper below through the film coating head 2 to perform film-coated paper lamination.

[0030] See attached document Figure 1 and 2 As shown, a pair of filter screens 3-3 located on the discharge end of the screw feed cylinder 1 are provided between the screw feed cylinder 1 and the coating head 2, and a filter screen replacement device 3 is provided outside the filter screens 3-3 and driven by a drive mechanism to replace the filter screens 3-3; the filter screen replacement device 3 includes a feed sleeve 3-1 connected between the screw feed cylinder 1 and the coating head 2 and a replacement channel 3-2 opened on the feed sleeve 3-1; the filter screen 3-3 is movably connected in the replacement channel 3-2, and a flexible sealing ring 4 is provided on the outside of the filter screen 3-3, which surrounds the feed sleeve 3-1 and is in contact with the inner wall of the replacement channel 3-2; wherein, in this embodiment, the feed sleeve 3-1 is a tubular structure with a channel on the inner side; specifically, as shown Figure 2 and Figure 4 As shown, the filter screen 3-3 includes a filter sheet 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 sheet 3-3-2 for installing the flexible sealing ring 4. In this embodiment, the filter sheet 3-3-2 and the sealing ring support plate 3-3-3 are integrated. The filter sheet 3-3-2 and the sealing ring support plate 3-3-3 are both made of hard, high-temperature resistant material. The filter sheet 3-3-2 has 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 fed from the screw feed cylinder 1 to the coating head 2 to prevent the coating head 2 from clogging. 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 operation of the coating machine extrusion equipment.

[0031] Specifically, such as Figure 2 As shown, in this embodiment, the filter replacement device 3 is connected to the screw feed cylinder 1 and the coating head 2 via the feeding sleeve 3-1, thereby connecting the screw feed cylinder 1 and the coating head 2. In use, the filter replacement device 3 has a filter 3-3 movably positioned within the replacement channel 3-2, with one filter 3-3 corresponding to and covering the inner channel of the feeding sleeve 3-1. When the filter 3-3 needs to be replaced, the drive mechanism moves the filter 3-3 within the replacement channel 3-2, causing the filter 3-3 in the feeding sleeve 3-1 to move out of the feeding sleeve 3-1 along the replacement channel 3-2. Simultaneously, another filter 3-3 moves into the feeding sleeve 3-1 to replace the filter 3-3 in its original position, ensuring smooth conveying between the screw feed cylinder 1 and the coating head 2 and maintaining normal raw material flow speed.

[0032] Furthermore, to ensure smooth movement of filter 3-3, such asFigure 4 and Figure 10 As shown, in this embodiment, the replacement channel 3-2 is configured to pass through the feeding sleeve 3-1 vertically. The filter screens 3-3 in this embodiment are arranged in a pair, spaced apart on the same vertical plane. A positioning frame 11 is movably connected to the inner side of the replacement channel 3-2, sleeved on the outer side of the upper and lower filter screens 3-3. Specifically, the positioning frame 11 in this embodiment has a rectangular plate-like structure. The positioning frame 11 has upper and lower mounting cavities for placing the upper and lower filter screens 3-3, which are spaced apart by partitions. Furthermore, the outer side of the positioning frame 11 is provided with a guide that is fixedly connected to the feeding sleeve 3-1. The guide rails 13 are provided on the left and right sides of the guide bracket 12 and the positioning frame 11. The guide bracket 12 is equipped with a drive cylinder 14. The piston end of the drive cylinder 14 passes through the guide bracket 12 and is fixedly connected to the positioning frame 11. When the filter screen 3-3 needs to be replaced, the piston end of the drive cylinder 14 drives the positioning frame 11 and the filter screen 3-3 on the positioning frame 11 to move up and down, thereby inserting the filter screen 3-3 on the outside of 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.

[0033] Furthermore, to ensure the airtightness of the filter screen 3-3 on the filter screen replacement device 3 and to prevent melted raw materials from leaking out from the replacement channel 3-2, such as... Figure 5 and Figure 11 As shown, the flexible sealing ring 4 in this embodiment includes an inner fixing part 4-1 that surrounds the filter sheet 3-3-2 and is fixedly connected to the outside of the sealing ring support plate 3-3-3; an outer movable part 4-2 that is disposed outside the inner fixing part 4-1 and spaced apart from the inner fixing part 4-1; and an inner elastic deformation piece 4-3 disposed outside the filter sheet 3-3-2. In this embodiment, the inner fixing part 4-1 and the outer movable part 4-2 are made of a hard, high-temperature resistant material, and both the inner fixing part 4-1 and the outer movable part 4-2 are arranged in a circular structure. 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 connected to the inner fixing part 4-3-3. -1 is fixedly connected to the inner ring, and the outer side of the inner elastic deformation piece 4-3 is connected to the inner ring of the outer movable part 4-2, so that the inner elastic deformation piece 4-3 is also arranged in a ring shape; specifically, the middle end of the inner elastic deformation piece 4-3 protrudes towards the center of the filter plate 3-3-2 and forms a deformation space 5 between the inner and outer sides of the inner elastic deformation piece 4-3. The feeding sleeve 3-1 is provided with a pressing protrusion 6 that protrudes towards the inner side of the replacement channel 3-2 and is correspondingly arranged with the outer movable part 4-2; then when the filter plate 3-3-2 is installed in place, the pressing protrusion 6 presses the outer movable part 4-2 inward, so that the inner elastic deformation piece 4-3 deforms outward and contacts and seals with the inner wall of the replacement channel 3-2.

[0034] Furthermore, such as Figure 5 and Figure 6As shown, in order to avoid excessive deformation of the inner elastic deformation piece 4-3 when it moves for replacement in the replacement channel 3-2, in this embodiment, the inner elastic deformation piece 4-3 includes a first hard connecting piece 4-3-1 connected with the inner fixed part 4-1 and attached to the outer wall of the sealing ring support plate 3-3-3, a flexible connecting piece 4-3-2 connected with the outer movable part 4-2 and gradually curved outwardly to the first hard connecting piece 4-3-1, and a second hard connecting piece 4-3-3 connected with the outer end of the flexible connecting piece 4-3-2 and perpendicular to the first hard connecting piece 4-3-1. Since the flexible connecting piece 4-3-2 is gradually curved outwardly to the first hard connecting piece 4-3-1 in this embodiment, only the outer hard movable part 4-2 contacts the inner wall of the replacement channel 3-2 during the replacement movement of the filter screen 3-3, thereby avoiding the flexible connecting piece 4-3-2 contacting the inner wall of the replacement channel 3-2 during the replacement movement, reducing the friction between the flexible connecting piece 4-3-2 and the inner wall of the replacement channel 3-2 during the replacement movement, prolonging the service life of the flexible sealing ring 4, and ensuring that the replaced flexible sealing ring 4 can achieve effective sealing. Referring to the attached Figure 12 At the same time, in this embodiment, the first hard connecting piece 4-3-1 connected with the inner fixed part 4-1 and the second hard connecting piece 4-3-3 perpendicular to the first hard connecting piece 4-3-1 are provided, so that when the outer movable part 4-2 is subjected to a corresponding force in the corresponding direction due to friction, 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 avoiding the outer movable part 4-2 driving the flexible connecting piece 4-3-2 to move in the corresponding direction under the action of friction.

[0035] Further, as shown in Figure 5 , Figure 6 and Figure 12As shown, in order to facilitate the replacement of filter screen 3-3 when extrusion protrusion 6 extrudes outer movable part 4-2, and further increases the sealing effect between filter screen 3-3 and feeding sleeve 3-1, in the embodiment, outer elastic deformation piece 7 is arranged around outer movable part 4-2 on the side away from inner elastic deformation piece 4-3. Outer elastic deformation piece 7 is also arranged in a ring shape and gradually curves from inside to outside to sealing ring support plate 3-3-3. Outer ring of outer elastic deformation piece 7 is provided with hard positioning part 8 arranged perpendicularly to sealing ring support plate 3-3-3. Hard positioning part 8 is provided with anti-skid support surface 9 arranged parallel to and spaced from the outer side of sealing ring support plate 3-3-3. When filter screen 3-3 is replaced, extrusion protrusion 6 extrudes outer movable part 4-2 on one side of sealing ring support plate 3-3-3. Anti-skid support surface 9 contacts the outer side of sealing ring support plate 3-3-3, so that outer elastic deformation piece 7 also deforms towards the inner wall of replacement channel 3-2 and contacts the inner wall of replacement channel 3-2 for sealing.

[0036] Further, as shown in Figure 7 , Figure 8 and Figure 9 , in order to further enhance the sealing performance of filter screen 3-3 in use, extrusion protrusion 6 in the embodiment is arranged in a hemispherical structure. The spherical surface of extrusion protrusion 6 is arranged towards the side of outer movable part 4-2 and used to contact and extrude outer movable part 4-2. In the embodiment, extrusion protrusion 6 is provided with elongated support part 10 fixedly connected to the inner wall of replacement channel 3-2. Elongated support part 10 further increases the extrusion distance of extrusion protrusion 6 on outer movable part 4-2. Elongated support part 10 in the embodiment can be made of high-temperature-resistant hard rubber. Specifically, extrusion protrusion 6 arranged on elongated support part 10 presses outer movable part 4-2 inward and makes outer movable part 4-2 contact the outer surface of inner fixed part 4-1. Similarly, inner elastic deformation piece 4-3 and outer elastic deformation piece 7 deform outward to contact the inner wall of replacement channel 3-2 for sealing, while forming a sealing space around deformation space 5. Thus, in use, due to the relative sealing of deformation space 5 and the gas in deformation space 5, when inner elastic deformation piece 4-3 is extruded by the molten raw material in feeding sleeve 3-1, the gas in deformation space 5 is further extruded outward to press inner elastic deformation piece 4-3. Thus, flexible connecting piece 4-3-2 is more tightly attached to the inner wall of replacement channel 3-2, thereby ensuring that filter screen 3-3 has good sealing performance in use. Based on the above structure, further, as shown in Figure 11 and Figure 12As shown, the hard positioning part 8 in the embodiment and the sealing ring support plate 3-3-3 are provided with a pair of auxiliary elastic sealing sheets 18 fixedly connected to the outer surface of the hard positioning part 8. The side of the auxiliary elastic sealing sheet 18 away from the hard positioning part 8 is in contact with the outer side of the sealing ring support plate 3-3-3. The auxiliary elastic sealing sheet 18 includes an arc-shaped guide part 18-1 fixedly connected to one end of the hard positioning part 8 and an arc-shaped contact part 18-2 connected to the other end of the arc-shaped guide part 18-1. The arc-shaped guide part 18-1 is gradually curved from inside to outside towards the center of the hard positioning part 8. The arc-shaped contact part 18-2 is gradually curved from inside to outside towards the side away from the center of the hard positioning part 8. When the filter screen 3-3 is replaced, the extrusion protrusion 6 extrudes the outer movable part 4-2 to the side of the inner fixed part 4-1. First, the auxiliary elastic sealing sheet 18 on the hard positioning part 8 is pressed and fitted to the outer surface of the sealing ring support plate 3-3-3. 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 form a relatively sealed space. When the extrusion protrusion 6 further extrudes the outer movable part 4-2 to contact the outer surface of the inner fixed part 4-1, the air pressure in the sealing space increases relatively. When the air pressure increases, the arc-shaped contact part 18-2 increases the contact area and contact pressure with the outer surface of the sealing ring support plate 3-3-3, thereby further improving the sealing effect of the flexible sealing ring 4. Figure 12 As shown, the arc-shaped guide part 18-1 on the auxiliary elastic sealing sheet 18 of the inner ring is gradually curved from inside to outside towards the center of the hard positioning part 8. The corresponding arc-shaped contact part 18-2 is gradually curved from inside to outside towards the side away from the center of the hard positioning part 8. When the air pressure increases, the arc-shaped contact part 18-2 increases the contact area and contact pressure with the outer surface of the sealing ring support plate 3-3-3, thereby further improving the sealing effect of the flexible sealing ring 4.

[0037] Further, as shown in Figure 2 and Figure 4 The guide bracket 12 is provided with cleaning channels 17 corresponding to the filter sheet 3-3-2 on the front and back sides. The left and right sides of the cleaning channels 17 are limited to the outside of the flexible sealing ring 4, thereby allowing the filter screen 3-3 to be cleaned through the cleaning channels 17. Figure 4 and Figure 10 In order to facilitate the positioning of the filter screen 3-3 in the positioning frame 11, a taking channel 15 horizontally arranged relative to the filter screen 3-3 is provided on the left end of the positioning frame 11. A taking outlet 16 corresponding to the taking channel 15 is provided on the side of the guide bracket 12. When in use, the upper filter screen 3-3 moves downward under the action of the driving oil cylinder 14 to replace the lower filter screen 3-3. The lower filter screen 3-3 is separated from the inner channel of the feeding sleeve 3-1. The replaced filter screen 3-3 can be taken out from the left to the right through the taking channel 15 and the taking outlet 16, thereby facilitating the cleaning of the replaced filter screen 3-3.

[0038] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A high-temperature continuous extrusion apparatus for laminating coated paper, comprising a screw feed cylinder (1) and a coating head (2) connected to the discharge end of the screw feed cylinder (1), characterized in that: A pair of filter screens (3-3) located at the discharge end of the screw feed cylinder (1) and the coating head (2) are provided between the screw feed cylinder (1) and the coating head (2), and a filter screen replacement device (3) is provided outside the filter screens (3-3) and driven by a drive mechanism to replace the filter screens (3-3). The filter screen replacement device (3) includes a feed sleeve (3-1) connected between the screw feed cylinder (1) and the coating head (2) and a replacement channel (3-2) opened on the feed sleeve (3-1); the filter screens (3-3) are movably connected to the replacement channel (3-2). Inside, a flexible sealing ring (4) is provided on the outside of the filter screen (3-3) to surround the feeding sleeve (3-1) and to press against the inner wall of the replacement channel (3-2); the flexible sealing ring (4) includes an inner fixed part (4-1) surrounding the filter screen (3-3), an outer movable part (4-2) provided on the outside of the inner fixed part (4-1) and spaced apart from the inner fixed part (4-1), and an inner elastic deformation piece (4-3) provided on the outside of the filter screen (3-3) and connected between the inner fixed part (4-1) and the outer movable part (4-2). The filter screen (3-3) includes a filter sheet (3-3-2) with a plurality of uniformly 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 sheet (3-3-2) for installing a flexible sealing ring (4). On the side of the outer movable part (4-2) away from the inner elastic deformable piece (4-3), there is an outer elastic deformable piece (7) surrounding the outer movable part (4-2). The outer elastic deformable piece (7) is arranged in a ring shape and gradually bends towards the sealing ring support plate (3-3-3) from the inside out. The outer ring of the outer elastic deformable piece (7) is provided with a rigid positioning part (8) perpendicular to the sealing ring support plate (3-3-3). The rigid positioning part (8) is close to the sealing ring support plate (3-3-3). -3) has a parallel sealing ring support plate (3-3-3) outer side and an anti-slip support surface (9) spaced apart from the parallel sealing ring support plate (3-3-3); when in use, the extrusion protrusion (6) extrudes the outer movable part (4-2) towards the sealing ring support plate (3-3-3), and the anti-slip support surface (9) contacts the outer side of the sealing ring support plate (3-3-3), so that the outer elastic deformation piece (7) deforms outward and contacts and seals the inner wall of the replacement channel (3-2); The extrusion protrusion (6) is hemispherical in shape and is provided with an extension support (10) fixedly connected to the inner wall of the replacement channel (3-2). The extrusion protrusion (6) provided on the extension support (10) presses the outer movable part (4-2) inward against the outer surface of the inner fixed part (4-1), so that the inner elastic deformation piece (4-3) deforms outward and contacts and seals with the inner wall of the replacement channel (3-2), while the deformation space (5) is surrounded to form a sealed space. A pair of auxiliary elastic sealing sheets (18) are fixedly connected to the outer surface of the rigid positioning part (8) and the sealing ring support plate (3-3-3). The side of the auxiliary elastic sealing sheet (18) away from the rigid positioning part (8) is in contact with the outer side of the sealing ring support plate (3-3-3). The auxiliary elastic sealing sheet (18) includes an arc-shaped guide part (18-1) fixedly connected to the rigid positioning part (8) at one end and an arc-shaped contact part (18-2) connected to the other end of the arc-shaped guide part (18-1). The arc-shaped guide part (18-1) is bent from the inside out towards the center of the rigid positioning part (8), and the arc-shaped contact part (18-2) is bent from the inside out towards the side away from the center of the rigid positioning part (8).

2. The high-temperature continuous extrusion equipment for laminated paper according to claim 1, characterized in that: The inner fixed part (4-1) is fixedly connected to the outside of the sealing ring support plate (3-3-3) and is arranged around the filter (3-3-2). The inner elastic deformation piece (4-3) is arranged on the outside of the filter (3-3-2). The inner side of the inner elastic deformation piece (4-3) is connected to the inner ring of the inner fixed part (4-1). The outer side of the inner elastic deformation piece (4-3) is connected to the inner ring of the outer movable part (4-2). The middle end of the inner elastic deformation piece (4-3) protrudes towards the center of the filter (3-3-2) and forms a deformation space (5) between the inner and outer sides of the inner elastic deformation piece (4-3). The feeding sleeve (3-1) is provided with a pressing protrusion (6) that protrudes towards the inside of the replacement channel (3-2) and is arranged corresponding to the outer movable part (4-2). The pressing protrusion (6) presses the outer movable part (4-2) inward so that the inner elastic deformation piece (4-3) deforms outward and contacts and seals with the inner wall of the replacement channel (3-2).

3. The high-temperature continuous extrusion equipment for laminated paper according to claim 2, characterized in that: The inner elastic deformable piece (4-3) includes a first rigid connecting piece (4-3-1) that is connected to the inner fixed part (4-1) and attached to the outer wall of the sealing ring support plate (3-3-3), a flexible connecting piece (4-3-2) that is connected to the outer movable part (4-2) and gradually curved towards the first rigid connecting piece (4-3-1) on the outside, and a second rigid connecting piece (4-3-3) that is connected to the outer end of the flexible connecting piece (4-3-2) and is perpendicular to the first rigid connecting piece.

4. The high-temperature continuous extrusion equipment for coated paper lamination according to claim 1, characterized in that: The replacement channel (3-2) is installed vertically through the feeding sleeve (3-1). The filter screens (3-3) are arranged in pairs, spaced apart, on the same vertical plane. A positioning frame (11) is movably connected to the inner side of the replacement channel (3-2) and fitted onto the outer sides of the upper and lower filter screens (3-3). A guide bracket (12) is fixedly connected to the feeding sleeve (3-1) on the outer side of the positioning frame (11). Guide rails (13) are provided on the left and right sides of the positioning frame (11) within the guide brackets (12). A drive cylinder (14) is provided on the guide bracket (12). The piston end of the drive cylinder (14) passes through the guide bracket (12) and is fixedly connected to the positioning frame (11). The piston end of the drive cylinder (14) drives the positioning frame (11) and the filter screen (3-3) on the positioning frame (11) to move up and down, thereby inserting the filter screen (3-3) on the outside of 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).

5. The high-temperature continuous extrusion equipment for coated paper lamination according to claim 4, characterized in that: The positioning frame (11) has a retrieval channel (15) on its left end that is horizontally positioned relative to the filter (3-3), and the guide bracket (12) has an outlet (16) on its side that is corresponding to the retrieval channel (15).

6. The high-temperature continuous extrusion equipment for laminated paper according to claim 4, characterized in that: The guide bracket (12) has cleaning channels (17) on its front and rear sides that correspond to the filter (3-3-2). The left and right sides of the cleaning channels (17) are limited outside the flexible sealing ring (4).

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