Cooling apparatus and method for a gpu multilayer coextrusion cast machine

Abstract

The application belongs to the technical field of casting machine, and particularly relates to a GPU multi-layer co-extrusion casting machine cooling device and method. The GPU multi-layer co-extrusion casting machine cooling device comprises a cooling cylinder, the inner wall of the cooling cylinder is provided with an annular jacket to form a jacket cavity, the jacket wall of the annular jacket is provided with a plurality of baffle assemblies which are adapted to rotate together with the annular jacket, a baffle lifting ring is inserted into the sleeve hole of the annular jacket, and the annular surface is provided with a deep groove corresponding to the area of the film-removing part of the cooling cylinder and a shallow groove corresponding to the area of the film-removing part of the cooling cylinder, a hollow roller shaft passes through the sleeve hole of the annular jacket, and the inside is separated by a roller shaft baffle to form a water inlet section and a water outlet section, and the water inlet section and the water outlet section are connected with the corresponding side wall of the annular jacket through a water inlet pipeline and a water outlet pipeline. The GPU multi-layer co-extrusion casting machine cooling device can prevent the temperature of the roller surface which is not in contact with the film from being significantly reduced, and it is difficult to form condensed water on the roller surface.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of casting machines, and particularly relates to a GPU multi-layer co-extrusion casting machine cooling device and method. BACKGROUND

[0002] GPU (Gel-Polyurethane) is a kind of polyurethane optical film material added with shape memory elastic gel, which is different from conventional TPU, and has more excellent mechanical strength, optical performance, weather resistance, and excellent shape memory function.

[0003] The patent document with the application number 202211155821.3 discloses a preparation method of GPU, wherein the multi-layer co-extrusion casting film extrusion technology is realized by a multi-layer co-extrusion casting machine. After the raw materials (gel particles and thermoplastic hydrogel film microspheres in the above document) are melted by the screw extrusion assembly of the multi-layer co-extrusion casting machine, they are extruded in the form of a multi-layer film into a casting die, and are cooled and formed on a cooling roller, and finally are wound up. The feature of the film obtained by casting and cooled and formed on the cooling roller is that the film only contacts part of the area of the roller surface, for example, the situation shown in the patent document with the application number 202222700052.2, during the rotation of the cooling roller, the roller surface will cycle between the state of contacting the film and not contacting the film. The existing cooling roller usually cools the entire roller surface, for example, the patent document with the application number 202120436594.6, which cools the entire roller surface by filling water in the roller. During the period when the roller surface contacts the film, it is simultaneously affected by the high-temperature film and the low-temperature cooling liquid, and the roller surface will maintain a certain temperature. With the rotation of the cooling roller, when the roller surface does not contact the film, it is only affected by the low-temperature cooling liquid, and the temperature of the roller surface will significantly decrease. However, due to the existence of the two heat sources of the casting die and the just-extruded film, the air temperature is relatively high, and this part of the roller surface is prone to produce condensed water, which will be brought to the film with the rotation or will drop on the film. Figure 4 The feature of the film obtained by casting and cooled and formed on the cooling roller is that the film only contacts part of the area of the roller surface, for example, the situation shown in the patent document with the application number 202222700052.2, during the rotation of the cooling roller, the roller surface will cycle between the state of contacting the film and not contacting the film. The existing cooling roller usually cools the entire roller surface, for example, the patent document with the application number 202120436594.6, which cools the entire roller surface by filling water in the roller. During the period when the roller surface contacts the film, it is simultaneously affected by the high-temperature film and the low-temperature cooling liquid, and the roller surface will maintain a certain temperature. With the rotation of the cooling roller, when the roller surface does not contact the film, it is only affected by the low-temperature cooling liquid, and the temperature of the roller surface will significantly decrease. However, due to the existence of the two heat sources of the casting die and the just-extruded film, the air temperature is relatively high, and this part of the roller surface is prone to produce condensed water, which will be brought to the film with the rotation or will drop on the film. SUMMARY

[0004] The purpose of the present application is to provide a GPU multi-layer co-extrusion casting machine cooling device and method to solve the technical problem that the temperature of the roller surface which is separated from the film will significantly decrease due to the whole cooling of the cooling roller of the casting machine, and the high-temperature air around is prone to produce condensed water on this part of the roller surface.

[0005] To solve the above technical problems, the application provides a GPU multi-layer co-extrusion casting machine cooling device, which comprises a cooling cylinder, an annular jacket is arranged on the inner wall of the cooling cylinder to form a jacket cavity, a plurality of baffle assemblies are arranged on the jacket wall of the annular jacket and are adapted to rotate together with the annular jacket, a baffle lifting ring is arranged in the jacket hole of the annular jacket, and a deep groove is arranged in the region of the ring surface corresponding to the film-removing part of the cooling cylinder, and a shallow groove is arranged in the region of the ring surface corresponding to the film-attaching part of the cooling cylinder, so that the baffle assembly is separated from the inner wall of the cooling cylinder when passing through the deep groove, the jacket cavity is opened, the baffle assembly is attached to the inner wall of the cooling cylinder when passing through the shallow groove, and the jacket cavity is closed, a hollow roller shaft passes through the jacket hole of the annular jacket, and the inside of the roller shaft is separated by a roller shaft baffle to form a water inlet section and a water outlet section, and the water inlet section and the water outlet section are connected to the corresponding side wall of the annular jacket through a water inlet pipeline and a water outlet pipeline respectively, so that the cooling liquid flows through the opened jacket cavity.

[0006] Further, a plurality of baffle through holes are arranged on the jacket wall of the annular jacket in the circumferential direction, the baffle assembly comprises a lifting column which is arranged in the baffle through hole in a dynamic sealing mode, a circular-arc baffle whose inner wall is connected to one end of the lifting column extending into the annular jacket, a transmission rod which is arranged at one end of the lifting column extending out of the annular jacket and is adapted to extend into the baffle lifting ring and slide against the groove bottom, and a baffle spring which is arranged at one end of the jacket wall of the annular jacket and is connected to the other end of the lifting column extending out of the annular jacket, and is in a compressed state before the transmission rod abuts against the deep groove, so as to rebound after the transmission rod leaves the shallow groove, and the circular-arc baffle is separated from the inner wall of the cooling cylinder.

[0007] Further, a water jacket is arranged on the circular-arc baffle, the jacket opening of the water jacket is connected to the inner wall of the annular jacket, and the jacket bottom is connected to the outer wall of the circular-arc baffle, so as to be synchronously contracted when the circular-arc baffle is separated from the inner wall of the cooling cylinder, and the corresponding jacket cavity is opened.

[0008] Further, the circular-arc baffles are arranged close to each other, the water jackets are tightly attached to each other, and the circular-arc baffles are arranged close to the side wall of the annular jacket, so that the water jackets are tightly attached to the side wall of the annular jacket, and the corresponding jacket cavity is closed before the circular-arc baffles are separated from the inner wall of the cooling cylinder.

[0009] Further, a plurality of water holes are arranged on the side wall of the annular jacket in the circumferential direction, a plurality of water inlet pipelines and a plurality of water outlet pipelines are respectively connected to the corresponding water holes, and a water valve is arranged in each of the water inlet pipeline and the water outlet pipeline, and the water valve is adapted to be opened after the circular-arc baffle is separated from the inner wall of the cooling cylinder, the water jacket is contracted, the corresponding jacket cavity is opened, and the cooling liquid flows through the opened jacket cavity through the water holes.

[0010] Further, the deep groove and the shallow groove are provided with a transmission rod sliding transition groove, and the upper transmission rod sliding transition groove is located before the film contact point of the cooling cylinder, and the water holes are arranged close to the inner wall of the cooling cylinder, so that the water jacket is contracted before the transmission rod slides to the deep groove, and the water holes are exposed to the released jacket cavity.

[0011] Further, the deep groove is provided with a plurality of slope bodies to drive the circular arc partition plate to lift and stir the water flow into turbulent flow when the transmission rod slides; the slope bodies are matched with the water holes, so that the water holes are exposed when the transmission rod slides over the slope top.

[0012] On the other hand, the application also provides a GPU multi-layer co-extrusion casting machine cooling method, which comprises the GPU multi-layer co-extrusion casting machine cooling device as described above; a deep groove is arranged in the area corresponding to the film contact part of the cooling cylinder on the partition plate lifting ring surface, and a shallow groove is arranged in the area corresponding to the film separation part of the cooling cylinder on the partition plate lifting ring surface; the partition plate assembly is separated from the inner wall of the cooling cylinder when passing through the deep groove, so as to release the jacket cavity, and the partition plate assembly is attached to the inner wall of the cooling cylinder when passing through the shallow groove, so as to close the jacket cavity, so that the cooling liquid flows through the released jacket cavity.

[0013] The GPU multi-layer co-extrusion casting machine cooling device provided by the application is provided with a partition plate lifting ring, a deep groove is arranged in the area corresponding to the film contact part of the cooling cylinder on the ring surface, and a shallow groove is arranged in the area corresponding to the film separation part of the cooling cylinder on the ring surface, so that the partition plate assembly is separated from the inner wall of the cooling cylinder when passing through the deep groove, so as to release the jacket cavity, and the partition plate assembly is attached to the inner wall of the cooling cylinder when passing through the shallow groove, so as to close the jacket cavity, so that the cooling liquid only flows through the released jacket cavity, that is, there is only cooling liquid in the jacket cavity corresponding to the film contact part, so that the temperature of the roller surface not in contact with the film is not significantly reduced, and it is difficult to form condensed water on the roller surface. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0015] Figure 1 is a structural schematic diagram of the GPU multi-layer co-extrusion casting machine cooling device of the application;

[0016] Figure 2 is a partial view of an isometric sectional view of the GPU multi-layer co-extrusion casting machine cooling device of the application;

[0017] Figure 3 isFigure 1 Enlarged view at A in the middle;

[0018] Figure 4 Figure 2 Enlarged view at B in the middle;

[0019] Figure 5 Sectional view of the GPU multi-layer co-extrusion casting machine cooling device of the present application Figure 1 ;

[0020] Figure 6 Figure 5 Enlarged view at C in the middle;

[0021] Figure 7 Cooperation diagram of the cooling cylinder and the annular jacket of the GPU multi-layer co-extrusion casting machine cooling device of the present application

[0022] Figure 8 Cooperation diagram of the hollow roller shaft and the water inlet pipe and the water outlet pipe of the GPU multi-layer co-extrusion casting machine cooling device of the present application

[0023] Figure 9 Sectional view of the GPU multi-layer co-extrusion casting machine cooling device of the present application Figure 2 ;

[0024] Figure 10 Isometric sectional view of the partition lifting ring of the GPU multi-layer co-extrusion casting machine cooling device of the present application

[0025] In the figure:

[0026] Cooling cylinder 100;

[0027] Annular jacket 200, partition through hole 210, water hole 220;

[0028] Jacket cavity 300;

[0029] Partition assembly 400, lifting column 410, circular arc partition 420, transmission rod 430, partition spring 440, water-proof jacket 450;

[0030] Partition lifting ring 500, deep groove 510, shallow groove 520, transmission rod sliding transition groove 530, slope body 540;

[0031] Hollow roller shaft 600, partition 610, water inlet section 620, water outlet section 630, water inlet pipe 640, water outlet pipe 650, water valve 660;

[0032] Film 710, threading pipe 720, rotary joint 730. DETAILED DESCRIPTION

[0033] ​​To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments implemented by those skilled in the art without creative effort are within the protection scope of the present invention.

[0034] Example

[0035] like Figure 1 As shown, the present invention provides a cooling device for a GPU multilayer co-extrusion casting machine, comprising: a cooling cylinder 100, wherein an annular jacket 200 is provided on its inner wall, combined with... Figure 2 To form a jacket cavity 300; the annular jacket 200 has a plurality of partition assemblies 400 on its sleeve wall, adapted to rotate together with the annular jacket 200; a partition lifting ring 500 extends into the sleeve hole of the annular jacket 200, and combines with Figure 10 and Figure 2 Furthermore, a deep groove 510 is dug in the area corresponding to the film-attached portion of the cooling cylinder 100, and a shallow groove 520 is dug in the area corresponding to the film-removing portion of the cooling cylinder 100. This allows the partition assembly 400 to detach from the inner wall of the cooling cylinder 100 when passing through the deep groove 510, thus opening up the section of the jacket cavity 300. When passing through the shallow groove 520, it adheres to the inner wall of the cooling cylinder 100, thus sealing the section of the jacket cavity 300. A hollow roller shaft 600 passes through the sleeve hole of the annular jacket 200, as shown in the reference section. Figure 9 The interior is separated by roller partition 610 to form water inlet section 620 and water outlet section 630; the water inlet section 620 and the water outlet section 630 are respectively connected to the corresponding side wall of the annular jacket 200 through water inlet pipe 640 and water outlet pipe 650, so that the coolant flows through the section of jacket cavity 300 that has been cleared.

[0036] This GPU multilayer co-extrusion casting machine cooling device is equipped with a partition lifting ring 500, and a deep groove 510 is opened on its ring surface in the area corresponding to the film-attached part of the cooling cylinder 100, and a shallow groove 520 is opened on its ring surface in the area corresponding to the film-removing part of the cooling cylinder 100. When the partition assembly 400 passes through the deep groove 510, it detaches from the inner wall of the cooling cylinder 100, allowing that section of the jacket cavity 300 to be opened. When it passes through the shallow groove 520, it adheres to the inner wall of the cooling cylinder 100, closing that section of the jacket cavity 300. This ensures that the coolant only flows through the section of the jacket cavity 300 that has been opened, meaning that the coolant is always only present in the jacket cavity 300 corresponding to the film-attached part. As a result, the temperature of the roller surface that is no longer in contact with the film 710 no longer drops significantly, making it difficult for condensation to form on this section of the roller surface.

[0037] like Figure 7 As shown, the annular sleeve 200 has several partition through holes 210 circumferentially opened on its sleeve wall; asFigure 1 and Figure 3 As shown, the partition assembly 400 may include: a lifting column 410, which is dynamically sealed in the partition through hole 210; combined with Figure 2 and Figure 4 An arc-shaped partition 420 has its inner wall connected to one end of the lifting column 410 that extends into the annular sleeve 200; a transmission rod 430 is provided at one end of the lifting column 410 that extends out of the annular sleeve 200, adapted to extend into the partition lifting ring 500 and slide against the bottom of the groove, where the bottom of the groove includes the bottom of a deep groove and the bottom of a shallow groove, that is, the transmission rod 430 can slide against the bottom of both the deep and shallow grooves; a partition spring 440 has one end disposed on the sleeve wall of the annular sleeve 200, and the other end connected to one end of the lifting column 410 that extends out of the annular sleeve 200, for reference. Figure 5 Furthermore, the transmission rod 430 is in a compressed state before it comes into contact with the deep groove 510, so that it rebounds after the transmission rod 430 leaves the shallow groove 520, causing the arc-shaped partition 420 to detach from the inner wall of the cooling cylinder 100.

[0038] like Figure 6 As shown, a water-proof sleeve 450 is fitted on the arc partition 420, and the opening of the water-proof sleeve 450 is connected to the inner wall of the annular jacket 200, and the bottom of the sleeve is connected to the outer wall of the arc partition 420, so that it can contract synchronously when the arc partition 420 is separated from the inner wall of the cooling cylinder 100, thus making room for the corresponding jacket cavity 300.

[0039] like Figure 6 As shown, in this embodiment, each of the arc-shaped partitions 420 is arranged close to the adjacent arc-shaped partitions 420, so that the water-proof sleeves 450 are tightly attached to each other, and each of the arc-shaped partitions 420 is arranged close to the side wall of the annular jacket 200, so that the water-proof sleeves 450 are tightly attached to the side wall of the annular jacket 200, so as to seal the corresponding jacket cavity 300 before the arc-shaped partitions 420 are separated from the inner wall of the cooling cylinder 100.

[0040] like Figure 7 As shown, the annular jacket 200 has several water holes 220 circumferentially opened on its side wall, combined with... Figure 8 and Figure 1 The inlet pipes 640 and the outlet pipes 650 are respectively connected to the corresponding water holes 220;

[0041] like Figure 8As shown, the water inlet pipe 640 and the water outlet pipe 650 are both provided with a water valve 660, and the water valve 660 is adapted to open when the circular arc partition plate 420 is separated from the inner wall of the cooling cylinder 100, the water jacket 450 is contracted, the corresponding jacket cavity 300 is released, and the cooling liquid flows through the water hole 220 to the released jacket cavity 300. In this embodiment, the water valve 660 can be but not limited to a solenoid valve, which can be closed when entering the shallow groove 520 section and opened when leaving the shallow groove 520 section by, for example, setting a proximity switch; refer to Figure 9 , the hollow roller shaft 600 can be provided with a wire pipe 720 for wiring, and a rotary joint 730 is arranged between the wire pipe 720 and the hollow roller shaft 600; it should be noted that making the water valve 660 closed when entering the shallow groove 520 section and opened when leaving the shallow groove 520 section belongs to the prior art and does not belong to the protection scope of the present application.

[0042] As shown in Figure 5 , the deep groove 510 and the shallow groove 520 are provided with a transmission rod sliding transition groove 530, and the upper transmission rod sliding transition groove 530 is located before the film contact point of the cooling cylinder 100, and the water hole 220 is close to the inner wall of the cooling cylinder 100. Opened, so that the water jacket 450 is contracted before the transmission rod 430 slides to the deep groove 510, and the water hole 220 is exposed to the released jacket cavity 300, the water valve 660 leaving the shallow groove 520 section can be opened at this time, the cooling liquid enters the released jacket cavity 300 through the exposed water hole 220, and the cooling cylinder 100 can start to cool from the inner wall to the outside before the film 710 is contacted, and when the roller surface is contacted with the film 710, it can be just in low temperature.

[0043] As shown in Figure 5 , the deep groove 510 can be provided with a plurality of slope bodies 540 to make the transmission rod 430 slide to lift the circular arc partition plate 420 to stir the water flow into turbulent flow and strengthen the heat exchange between the cooling liquid and the cooling cylinder 100; the slope body 540 is matched with the water hole 220, so that the water hole 220 is exposed when the transmission rod 430 slides over the slope top, refer to Figure 5 , specifically, when the transmission rod 430 slides over the slope top of the slope body 540, the water jacket 450 does not cover the water hole 220.

[0044] The working principle of the GPU multi-layer co-extrusion casting machine cooling device is as follows. Refer to Figure 5 , Figure 5 , the upper entering arrow indicates that the film starts to contact with the cooling cylinder 100, Figure 5The leaving arrow in the lower right corner indicates that the film separates from the cooling cylinder 100, and the cooling cylinder 100 rotates counterclockwise. The hollow roller shaft 600 is connected to the water holes 220 on the annular jacket 200 through the water inlet pipe 640 and the water outlet pipe 650. When the hollow roller shaft 600 rotates, it drives the cooling cylinder 100 to rotate. The baffle assembly 400 arranged on the annular jacket 200 also rotates with the cooling cylinder 100, while the baffle lifting ring 500 is stationary and extends into the sleeve hole of the annular jacket 200 from the outside. The deep groove 510 is arranged in the area corresponding to the film-attached part of the cooling cylinder 100 on the surface of the baffle lifting ring 500, and the shallow groove 520 is arranged in the area corresponding to the film-separated part of the cooling cylinder 100. During the rotation of the cooling cylinder 100, the transmission rod 430 slides against the groove bottom of the deep groove 510 and the shallow groove 520. When the transmission rod 430 slides in the shallow groove 520, the lifting column 410 is pushed out to the farthest position, and at this time, the water-proof sleeve 450 is lifted to the maximum by the circular arc baffle 420. In this way, the water-proof sleeve 450 lifted to the maximum is tightly attached to the front and back, and the sides are tightly attached to the side wall of the annular jacket 200, thereby closing the jacket cavity 300 corresponding to the shallow groove 520, and the corresponding water valve 660 is also kept closed to prevent the cooling liquid from impacting the water-proof sleeve 450. In this way, the jacket cavity 300 does not have cooling liquid, that is, the temperature of the roller surface that is not in contact with the film no longer decreases significantly. When the transmission rod 430 slides to the upper transmission rod sliding transition groove 530, the lifting column 410 is pushed in by the baffle spring 440, the water-proof sleeve 450 moves inward with the circular arc baffle 420 and gradually retracts, and the water hole 220 is exposed. At this time, the water valve 660 is opened, the cooling liquid enters the jacket cavity 300 released by the exposed water hole 220, and the cooling cylinder 100 can start to cool from the inner wall to the outside before the film 710 is attached. When the roller surface contacts the film 710, it can be at a low temperature. Then, the transmission rod 430 slides in the deep groove 510 provided with a plurality of slope bodies 540. During this period, the water valve 660 is in an open state, and the water hole 220 is not blocked by the water-proof sleeve 450. The cooling liquid enters the jacket cavity 300 through the water hole 220 in the water inlet pipe 640 and is disturbed into turbulent flow by the lifted circular arc baffle 420, thereby fully exchanging heat with the cooling cylinder 100. The film is cooled and formed in this section. When the transmission rod 430 slides to the lower transmission rod sliding transition groove 530, the lifting column 410 gradually pushes the lifting column 410 outward, and the water-proof sleeve 450 is gradually lifted. The water valve 660 in the water inlet pipe 640 can be closed at this time. The water-proof sleeve 450 gradually expels the cooling liquid until it is lifted to the maximum to close the corresponding jacket cavity 300. The water valve 660 in the water outlet pipe 650 can be closed at this time. Then, the transmission rod 430 slides in the shallow groove 520.

[0045] In the embodiment, a GPU multi-layer co-extrusion casting machine cooling method is also provided, comprising: the GPU multi-layer co-extrusion casting machine cooling device as described above; a deep groove 510 is opened in the area corresponding to the film-attached part of the cooling cylinder 100 on the ring surface of the baffle lifting ring 500, and a shallow groove 520 is opened in the area corresponding to the film-detached part of the cooling cylinder 100 on the ring surface of the baffle lifting ring 500; the baffle assembly 400 is separated from the inner wall of the cooling cylinder 100 when passing through the deep groove 510, so as to leave out the jacket cavity 300 at this section, and the baffle assembly 400 is attached to the inner wall of the cooling cylinder 100 when passing through the shallow groove 520, so as to close the jacket cavity 300 at this section, so that the cooling liquid flows through the jacket cavity 300 left out.

[0046] The GPU multi-layer co-extrusion casting machine cooling method is described above, and will not be repeated here.

[0047] In summary, the GPU multi-layer co-extrusion casting machine cooling device sets the baffle lifting ring, opens a deep groove in the area corresponding to the film-attached part of the cooling cylinder on the ring surface, and opens a shallow groove in the area corresponding to the film-detached part of the cooling cylinder on the ring surface, so that the baffle assembly is separated from the inner wall of the cooling cylinder when passing through the deep groove, so as to leave out the jacket cavity at this section, and the baffle assembly is attached to the inner wall of the cooling cylinder when passing through the shallow groove, so as to close the jacket cavity at this section, so that the cooling liquid only flows through the jacket cavity left out, that is, there is always cooling liquid in the jacket cavity corresponding to the film-attached part, so that the temperature of the roller surface not in contact with the film is no longer significantly reduced, and it is difficult to form condensed water on this roller surface.

[0048] In the embodiments provided in the present application, it should be understood that the disclosed system and device can be implemented in other manners. The above-described embodiments are only illustrative, for example, the division of the described mechanisms is only a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0049] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] Based on the above ideal embodiments according to the present application, and through the above description, those skilled in the art can make various changes and modifications without departing from the scope of the present application. The technical scope of the present application is not limited to the content described in the specification, and must be determined by the scope of the claims.

Claims

1. A cooling device for a GPU multi-layer co-extrusion cast film machine, characterized in that, The application relates to a cooling device for a GPU multi-layer co-extrusion casting machine. The application comprises: a cooling cylinder (100) provided with an annular jacket (200) on the inner wall to form a jacket cavity (300); the jacket wall of the annular jacket (200) is provided with a plurality of baffle assemblies (400) adapted to rotate together with the annular jacket (200); a baffle lifting ring (500) extends into the sleeve hole of the annular jacket (200), and the annular surface is provided with a deep groove (510) in the area corresponding to the part where the film of the cooling cylinder (100) is attached, and is provided with a shallow groove (520) in the area corresponding to the part where the film of the cooling cylinder (100) is detached, so that the baffle assembly (400) is separated from the inner wall of the cooling cylinder (100) when passing through the deep groove (510), and the jacket cavity (300) is opened, and the baffle assembly (400) is attached to the inner wall of the cooling cylinder (100) when passing through the shallow groove (520), and the jacket cavity (300) is closed; a hollow roller shaft (600) passes through the sleeve hole of the annular jacket (200), and the inside is separated by a roller shaft baffle (610) to form a water inlet section (620) and a water outlet section (630); the water inlet section (620) and the water outlet section (630) are connected with the corresponding side wall of the annular jacket (200) through a water inlet pipeline (640) and a water outlet pipeline (650) respectively, so that the cooling liquid flows through the opened jacket cavity (300); a plurality of baffle through holes (210) are formed in the jacket wall of the annular jacket (200) in the circumferential direction; the baffle assembly (400) comprises: a lifting column (410) which is dynamically sealed in the baffle through hole (210); a circular-arc baffle (420) whose inner wall is connected with one end of the lifting column (410) extending into the annular jacket (200); a transmission rod (430) which is arranged at one end of the lifting column (410) extending out of the annular jacket (200) and is adapted to extend into the baffle lifting ring (500) and slide against the groove bottom; a baffle spring (440) which is arranged at one end of the jacket wall of the annular jacket (200) and connected with the other end of the lifting column (410) extending out of the annular jacket (200), and is in a compressed state before the transmission rod (430) abuts against the deep groove (510), so as to rebound after the transmission rod (430) leaves the shallow groove (520), and make the circular-arc baffle (420) separate from the inner wall of the cooling cylinder (100); a water-proof sleeve (450) is sleeved on the circular-arc baffle (420), and the sleeve opening of the water-proof sleeve (450) is connected with the inner wall of the annular jacket (200), and the sleeve bottom is connected with the outer wall of the circular-arc baffle (420), so as to shrink synchronously when the circular-arc baffle (420) separates from the inner wall of the cooling cylinder (100), and open the corresponding jacket cavity (300).

2. The GPU multi-layer co-extrusion casting machine cooling device according to claim 1, wherein Each of the arc-shaped partitions (420) is arranged close to an adjacent arc-shaped partition (420) to make the water isolation sleeves (450) close to each other, and each of the arc-shaped partitions (420) is arranged close to the sidewall of the annular jacket (200) to make the water isolation sleeves (450) close to the sidewall of the annular jacket (200), so as to close the corresponding jacket cavities (300) before the arc-shaped partitions (420) are separated from the inner wall of the cooling cylinder (100).

3. The GPU multi-layer co-extrusion casting machine cooling device according to claim 2, characterized in that, The sidewall of the annular jacket (200) is provided with a plurality of water holes (220) in the circumferential direction, and a plurality of water inlet pipes (640) and a plurality of water outlet pipes (650) are respectively connected to the corresponding water holes (220); The water inlet pipes (640) and the water outlet pipes (650) are respectively provided with water valves (660), and the water valves (660) are adapted to be opened after the arc-shaped partitions (420) are separated from the inner wall of the cooling cylinder (100), the water isolation sleeves (450) are contracted, and the corresponding jacket cavities (300) are released, so that the cooling liquid flows through the released jacket cavities (300) through the water holes (220).

4. The GPU multi-layer co-extrusion casting machine cooling device according to claim 3, characterized in that, The deep grooves (510) and the shallow grooves (520) are provided with transmission rod sliding transition grooves (530), and the upper transmission rod sliding transition grooves (530) are located before the film contact point of the cooling cylinder (100), and the water holes (220) are arranged close to the inner wall of the cooling cylinder (100) to expose the water holes (220) in the released jacket cavities (300) before the transmission rod (430) slides to the deep grooves (510), so that the water isolation sleeves (450) are contracted.

5. The GPU multi-layer co-extrusion casting machine cooling device according to claim 4, characterized in that, The deep grooves (510) are provided with a plurality of slope bodies (540) to stir the water flow into turbulent flow when the transmission rod (430) slides and drives the arc-shaped partitions (420) to rise and fall; The slope bodies (540) are matched with the water holes (220) to keep the water holes (220) exposed when the transmission rod (430) slides over the slope top.

6. A method of cooling a multi-layer co-extrusion cast film machine of a GPU, characterized in that, The GPU multi-layer co-extrusion casting machine cooling device according to any one of claims 1 to 5 is adopted; Deep grooves (510) are arranged in the area corresponding to the film contact point of the cooling cylinder (100) on the surface of the partition lifting ring (500), and shallow grooves (520) are arranged in the area corresponding to the film separation point of the cooling cylinder (100) on the surface of the partition lifting ring (500); The partition assembly (400) is separated from the inner wall of the cooling cylinder (100) by the partition lifting ring (500) when passing through the deep grooves (510) to release the jacket cavities (300), and is close to the inner wall of the cooling cylinder (100) when passing through the shallow grooves (520) to close the jacket cavities (300), so that the cooling liquid flows through the released jacket cavities (300). ​

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