Rapid cooling equipment for polyester film extrusion

Abstract

The utility model discloses rapid cooling equipment for polyester film extrusion, and belongs to the technical field of polyester film processing equipment. The device mainly comprises two supporting plates, two water-cooling roller sets are installed between the two supporting plates, the two ends of a first water-cooling roller, the two ends of a second water-cooling roller, the two ends of a third water-cooling roller and the two ends of a fourth water-cooling roller are rotationally installed on the side walls of the supporting plates through bearings, and an extruded polyester film is cooled through the two water-cooling roller sets. Each water-cooling roller group is provided with four cooling rollers, so that the polyester film is wound in and out from the four cooling rollers, in the winding-in and winding-out process, the double surfaces of the polyester film are subjected to heat absorption cooling treatment, and a plurality of water-cooling rollers are adopted for cooling treatment, so that the situation that heat cannot be discharged at the first time due to the small number of water-cooling rollers is reduced; and the rapid cooling effect of the polyester film can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of polyester film processing equipment, and specifically to a rapid cooling device for polyester film extrusion. Background Art

[0002] During the PET film production process, after being extruded through an extruder to create thicker films, a cooling and setting process is typically required. The purpose of this cooling and setting process is to solidify the film at an appropriate temperature to ensure it achieves the desired physical properties, thickness, and surface quality. During the cooling process, the molecular chains of the PET film become oriented to a certain extent, thereby enhancing the film's mechanical properties and stability.

[0003] After searching, the announcement number is CN216299874U, which discloses a water-cooling device for a polyester film production line, including a box body, a production table fixedly installed on the top of the box body, a base frame fixedly connected to the bottom of the box body, and a water-cooling mechanism arranged inside the box body, the water-cooling mechanism including a water storage tank, a refrigeration box and a cooling pump, the water storage tank, the refrigeration box and the cooling pump are all fixedly mounted on the inner wall of the box body, the polyester film production line has a water-cooling mechanism and a refrigeration mechanism, uses a condenser to produce cold air, and drives a fan driven by a driving motor to cool the water in the water-cooling box, uses a cooling pump to transfer the water to the production table, and after cooling, transfers it to a filter net for filtration and falls into the water storage tank, thereby cooling the water and then cooling the production line, and recovering the cooled waste water for cooling, thereby realizing a cooling cycle, thereby improving the cooling efficiency.

[0004] However, after being extruded by an extruder, the existing polyester film is cooled and shaped, and a water bath cooling method and a cooling roller are often used for rapid cooling. However, when the existing cooling roller cools the polyester film, the cooling effect of the polyester film is reduced because the cooling roller cannot quickly conduct heat after absorbing heat. At the same time, the less arrangement of cooling rollers may also cause this situation. Therefore, in order to further improve the cooling effect of the cooling roller on the polyester film, it is necessary to provide a rapid cooling device for polyester film extrusion to solve the above problems.

[0005] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a rapid cooling device for polyester film extrusion to solve the problems raised in the above background technology.

[0007] The technical solution adopted by this application to solve its technical problems is:

[0008] A rapid cooling device for polyester film extrusion, comprising a support plate, wherein two support plates are provided, and two groups of water-cooled rollers are installed between the two support plates, wherein the water-cooled roller group comprises a first water-cooled roller, a second water-cooled roller, a third water-cooled roller, and a fourth water-cooled roller, wherein both ends of the first water-cooled roller, the second water-cooled roller, the third water-cooled roller, and the fourth water-cooled roller are rotatably mounted on the side wall of the support plate through bearings, the second water-cooled roller and the third water-cooled roller are located in the middle of the side wall of the support plate in the horizontal direction, the first water-cooled roller is located directly above the second water-cooled roller, and the fourth water-cooled roller is located directly below the third water-cooled roller;

[0009] A mounting groove is provided at the center of the vertical side walls of the two support plates. A spray cooling component is installed in the mounting groove. The spray cooling component is located in the gap between the two groups of water-cooled rollers.

[0010] Preferably, any one of the first water-cooled roller, the second water-cooled roller, the third water-cooled roller and the fourth water-cooled roller includes a roller, a water inlet shaft pipe, a water inlet trough, a heat absorption trough, a water outlet shaft pipe and a water outlet trough, one end of the roller is welded to the water inlet shaft pipe, and the other end of the roller is welded to the water outlet shaft pipe, and the side walls of the water inlet shaft pipe and the water outlet shaft pipe are rotatably connected on the side wall of the support plate through a bearing seat, a water inlet trough is provided inside the water inlet shaft pipe, a water outlet trough is provided inside the water outlet shaft pipe, and a heat absorption trough is provided inside the roller, and the water inlet trough, the heat absorption trough and the water outlet trough are connected.

[0011] Preferably, a spiral blade for guiding the direction of water flow is fixedly connected to the heat absorption groove.

[0012] Preferably, the water inlet pipes and outlet pipes of the first water-cooled roller, the second water-cooled roller, the third water-cooled roller and the fourth water-cooled roller are all plugged and installed with rotary joints. The rotary joint located on the water inlet pipe is installed by docking with the water inlet pipe through the water inlet branch pipe, and the rotary joint located on the water outlet pipe is installed by docking with the water outlet pipe through the water outlet branch pipe.

[0013] Preferably, the spray cooling assembly includes a sliding mechanism, a spray mechanism and a driving mechanism. The sliding mechanism is installed in an installation groove opened on the side wall of one of the support plates, and the driving mechanism is installed in an installation groove opened on the other support plate. The spray mechanism is provided with two groups, and the two groups of spray mechanisms are symmetrical and horizontally installed between the sliding mechanism and the driving mechanism.

[0014] Preferably, the sliding mechanism includes a guide rail, a slide groove and a slider. The guide rail is fixedly installed in the installation groove by screws. The slide groove is opened on the side wall of the guide rail. The slider is slidably connected in the slide groove. One end of the two groups of spray mechanisms is respectively fixedly installed with the slider.

[0015] Preferably, the driving mechanism includes a first mounting plate, a second mounting plate, a first screw, a second screw, a threaded seat and a servo motor, one end of the first screw and one end of the second screw are fixedly mounted via a flange, and the side wall threads of the first screw and the second screw are in opposite directions, the threaded seat is threadedly connected to the side walls of the first screw and the second screw, respectively, the side walls of the threaded seat are fixedly mounted on the other end of the spray mechanism, the other end of the first screw is mounted on the bottom surface of the first mounting plate through a bearing seat, the first mounting plate is fixedly mounted on the side wall of the mounting groove, the other end of the second screw is rotatably connected inside the second mounting plate, and the other end of the second screw is fixedly mounted to the output shaft of the servo motor, the servo motor is fixedly mounted on the bottom surface of the second mounting plate, and the second mounting plate is mounted on the side wall of the mounting groove.

[0016] Preferably, the spray mechanism includes a movable frame and a spray head, two ends of the movable frame are fixedly mounted to a slider and a threaded seat respectively, and a plurality of spray heads are equidistantly mounted on the bottom surface of the movable frame.

[0017] The beneficial effects of this application are:

[0018] 1. The extruded polyester film is cooled by two sets of water-cooled rollers, and each set of water-cooled rollers is equipped with four cooling rollers, so that the polyester film is wound in and out of the four cooling rollers. During the winding process, both sides of the polyester film are subjected to heat absorption and cooling. The use of multiple water-cooled rollers for cooling can reduce the heat absorption that cannot be discharged in the first time due to the small number of water-cooled rollers, thereby improving the rapid cooling effect of the polyester film.

[0019] 2. By adding a spray cooling component between the two groups of water-cooled rollers, the polyester film is further cooled by the spray cooling component, so as to better achieve the purpose of quickly cooling the polyester film and shaping it. At the same time, the heat dissipation efficiency of the water-cooled roller is improved, and the time required for cooling the polyester film is reduced, thereby improving production efficiency.

[0020] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0022] In the attached figure:

[0023] Figure 1 This is an overall schematic diagram of a rapid cooling device for polyester film extrusion according to the present invention;

[0024] Figure 2 This is a schematic diagram of the distribution structure of the water-cooling roller group on the support plate of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the spray cooling component of the utility model;

[0026] Figure 4 This is a schematic cross-sectional structural diagram of the water-cooling roller of the present invention.

[0027] Among them, the reference numerals in the figures are:

[0028] 1. Support plate;

[0029] 2. Water-cooled roller group; 21. First water-cooled roller; 22. Second water-cooled roller; 23. Third water-cooled roller; 24. Fourth water-cooled roller;

[0030] 201, roller; 202, water inlet shaft; 203, water inlet trough; 204, heat absorption trough; 205, spiral blade; 206, water outlet shaft; 207, water outlet trough;

[0031] 3. Bearing seat;

[0032] 4. Rotary joint;

[0033] 5. Water inlet pipe; 51. Water inlet branch pipe;

[0034] 6. Spray cooling assembly; 61. Guide rail; 62. Slide; 63. Slider; 64. Moving frame; 65. Spray head; 66. Threaded seat; 67. First screw; 68. Second screw; 69. First mounting plate; 610. Second mounting plate; 611. Servo motor;

[0035] 7. Outlet pipe; 71. Outlet branch pipe;

[0036] 8. Mounting slot;

[0037] 9. Polyester film. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0040] See also Figure 1-4 , the embodiment provided by the utility model:

[0041] A rapid cooling device for polyester film extrusion, comprising a support plate 1, wherein two support plates 1 are provided, and two groups of water-cooled roller groups 2 are installed between the two support plates 1, the water-cooled roller group 2 comprising a first water-cooled roller 21, a second water-cooled roller 22, a third water-cooled roller 23 and a fourth water-cooled roller 24, both ends of the first water-cooled roller 21, the second water-cooled roller 22, the third water-cooled roller 23 and the fourth water-cooled roller 24 are rotatably mounted on the side wall of the support plate 1 through bearings, the second water-cooled roller 22 and the third water-cooled roller 23 are located in the middle of the side wall of the support plate 1 in the horizontal direction, the first water-cooled roller 21 is located directly above the second water-cooled roller 22, and the fourth water-cooled roller 24 is located directly below the third water-cooled roller 23;

[0042] When the extruded polyester film 9 is cooled, the polyester film 9 is wound in from above the first water-cooled roller 21 of the first group, then wound out from the bottom of the second water-cooled roller 22, wound in from above the third water-cooled roller 23, then wound out from below the fourth water-cooled roller 24, and then wound in from above the first water-cooled roller 21 of the second group, and wound out from the second group of water-cooled rollers according to the winding direction of the first group, so that the extruded polyester film 9 is quickly cooled by multiple water-cooled rollers.

[0043] Specifically, any one of the first water-cooled roller 21, the second water-cooled roller 22, the third water-cooled roller 23 and the fourth water-cooled roller 24 includes a roller 201, a water inlet shaft pipe 202, a water inlet groove 203, a heat absorption groove 204, a water outlet shaft pipe 206 and a water outlet groove 207. One end of the roller 201 is welded to the water inlet shaft pipe 202, and the other end of the roller 201 is welded to the water outlet shaft pipe 206. The side walls of the water inlet shaft pipe 202 and the water outlet shaft pipe 206 are rotatably connected to the side wall of the support plate 1 through the bearing seat 3. The water inlet shaft pipe 202 is provided with a water inlet groove 203, the water outlet shaft pipe 206 is provided with a water outlet groove 207, and the roller 201 is provided with a heat absorption groove 204. The water inlet groove 203, the heat absorption groove 204 and the water outlet groove 207 are connected, and a spiral blade 205 for guiding the direction of water flow is fixedly connected to the heat absorption groove 204.

[0044] When the coolant enters the heat absorption groove 204 in the roller 201 from the water inlet groove 203 of the water inlet pipe 5, after being guided by the spiral blade 205, the polyester film 9 passing through the side wall of the roller 201 is absorbed by the roller 201, and the coolant flowing in the heat absorption groove 204 can absorb the heat of the side wall of the roller 201, and is quickly discharged from the heat absorption groove 204 after being guided by the spiral blade 205. The spiral blade 205 is in contact with the side wall of the roller 201, and the spiral blade 205 is in a thin sheet shape, which can also provide heat absorption efficiency for the roller 201, thereby better cooling the polyester film 9.

[0045] Among them, the water inlet pipe 5 and the water outlet pipe 7 of the first water-cooled roller 21, the second water-cooled roller 22, the third water-cooled roller 23 and the fourth water-cooled roller 24 are all plugged with a rotary joint 4. The rotary joint 4 on the water inlet pipe 5 is connected to the water inlet pipe 5 through the water inlet branch pipe 51, and the rotary joint 4 on the water outlet pipe 7 is connected to the water outlet pipe 7 through the water outlet branch pipe 71. The coolant is pumped through the water inlet pipe 5 from the multiple water inlet branches 51 into the water inlet shaft pipe 202 to provide cooling for each roller 201. The cooling liquid can be discharged from the inside of each roller 201 again through multiple water outlet branches 71 in cooperation with the water outlet pipe 7 to be cooled by the cooling device. The cooled cooling liquid is introduced into each roller 201 again through the water inlet pipe 5 to form a water circulation system, thereby providing cooling liquid for multiple water-cooled rollers, so that the multiple water-cooled rollers can maintain a low temperature state to absorb the heat on the extruded polyester film 9, thereby quickly shaping the polyester film 9.

[0046] An installation groove 8 is opened in the center of the vertical side wall of the two support plates 1, and a spray cooling component 6 is installed in the installation groove 8. The spray cooling component 6 is located in the gap between the two groups of water-cooled roller groups 2. The polyester film 9 can be cooled again through the spray cooling component 6 to further achieve the effect of rapid cooling.

[0047] Specifically, the spray cooling assembly 6 includes a sliding mechanism, a spray mechanism and a driving mechanism. The sliding mechanism is installed in an installation groove 8 opened on the side wall of one of the support plates 1, and the driving mechanism is installed in an installation groove 8 opened on the other support plate 1. There are two groups of spray mechanisms, and the two groups of spray mechanisms are symmetrical and horizontally installed between the sliding mechanism and the driving mechanism. The sliding mechanism includes a guide rail 61, a slide groove 62 and a slider 63. The guide rail 61 is fixedly installed in the installation groove 8 by screws. The slide groove 62 is opened on the side wall of the guide rail 61. The slider 63 is slidably connected in the slide groove 62. One end of the two groups of spray mechanisms is fixedly installed with the slider 63 respectively.

[0048] The driving mechanism includes a first mounting plate 69, a second mounting plate 610, a first screw 67, a second screw 68, a threaded seat 66 and a servo motor 611. One end of the first screw 67 and one end of the second screw 68 are fixedly installed through a flange, and the side wall threads of the first screw 67 and the second screw 68 are in opposite directions. The threaded seat 66 is threadedly connected to the side walls of the first screw 67 and the second screw 68 respectively. The side walls of the threaded seat 66 are fixedly installed on the other end of the spray mechanism respectively. The other end of the first screw 67 is mounted on the bottom surface of the first mounting plate 69 through the bearing seat 3. The first mounting plate 69 is fixedly installed on the side wall of the mounting groove 8. The other end of the second screw 68 is rotatably connected inside the second mounting plate 610, and the other end of the second screw 68 is fixedly installed on the output shaft of the servo motor 611. The servo motor 611 is fixedly installed on the bottom surface of the second mounting plate 610, and the second mounting plate 610 is installed on the side wall of the mounting groove 8.

[0049] The spraying mechanism includes a movable frame 64 and a nozzle 65. The two ends of the movable frame 64 are fixedly mounted on the slider 63 and the threaded seat 66 respectively. A plurality of nozzles 65 are equidistantly mounted on the bottom surface of the movable frame 64. A water tank is provided inside the movable frame 64. A water pipe is connected through the water inlet joint on one end. By introducing the coolant, the coolant can be sprayed out from each nozzle 65 to reduce the surface temperature of the polyester film 9.

[0050] The servo motor 611 in the driving mechanism drives the first screw 67 and the second screw 68 to rotate. The forward or reverse rotation of the first screw 67 and the second screw 68 can respectively drive the two threaded seats 66 to move toward or oppositely, thereby enabling the two movable racks 64 to move toward or oppositely, and at the same time enabling the slider 63 to slide in the slide groove 62, thereby adjusting the distance from the multiple nozzles 65 on the two movable racks 64 to the polyester film 9, so as to better provide cooling treatment for the polyester film 9.

[0051] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A rapid cooling device for polyester film extrusion, characterized by: The invention comprises a support plate (1), wherein two support plates (1) are provided, and two groups of water-cooled roller groups (2) are installed between the two support plates (1), and the water-cooled roller group (2) comprises a first water-cooled roller (21), a second water-cooled roller (22), a third water-cooled roller (23) and a fourth water-cooled roller (24), and both ends of the first water-cooled roller (21), the second water-cooled roller (22), the third water-cooled roller (23) and the fourth water-cooled roller (24) are rotatably installed on the side wall of the support plate (1) through bearings, and the second water-cooled roller (22) and the third water-cooled roller (23) are located in the middle of the side wall of the support plate (1) in the horizontal direction, and the first water-cooled roller (21) is located directly above the second water-cooled roller (22), and the fourth water-cooled roller (24) is located directly below the third water-cooled roller (23); A mounting groove (8) is provided at the center of the vertical side walls of the two support plates (1), a spray cooling component (6) is installed in the mounting groove (8), and the spray cooling component (6) is located in the gap between the two groups of water-cooled roller groups (2).

2. The rapid cooling device for polyester film extrusion according to claim 1, characterized in that: Any one of the first water-cooled roller (21), the second water-cooled roller (22), the third water-cooled roller (23) and the fourth water-cooled roller (24) comprises a roller (201), a water inlet shaft tube (202), a water inlet trough (203), a heat absorption trough (204), a water outlet shaft tube (206) and a water outlet trough (207); one end of the roller (201) is welded to the water inlet shaft tube (202), and the other end of the roller (201) is welded to the water outlet shaft tube (206). The side walls of the water inlet shaft pipe (202) and the water outlet shaft pipe (206) are rotatably connected to the side wall of the support plate (1) through a bearing seat (3); a water inlet groove (203) is provided inside the water inlet shaft pipe (202); a water outlet groove (207) is provided inside the water outlet shaft pipe (206); a heat absorption groove (204) is provided inside the roller (201); and the water inlet groove (203), the heat absorption groove (204) and the water outlet groove (207) are connected.

3. The rapid cooling device for polyester film extrusion according to claim 2, characterized in that: The heat absorption groove (204) is fixedly connected with a spiral blade (205) for guiding the direction of water flow.

4. The rapid cooling device for polyester film extrusion according to claim 2, characterized in that: The water inlet pipe (5) and the water outlet pipe (7) of the first water-cooled roller (21), the second water-cooled roller (22), the third water-cooled roller (23) and the fourth water-cooled roller (24) are all plugged and installed with a rotary joint (4); the rotary joint (4) located on the water inlet pipe (5) is docked and installed with the water inlet pipe (5) through a water inlet branch pipe (51); and the rotary joint (4) located on the water outlet pipe (7) is docked and installed with the water outlet pipe (7) through a water outlet branch pipe (71).

5. The rapid cooling device for polyester film extrusion according to claim 1, characterized in that: The spray cooling assembly (6) comprises a sliding mechanism, a spray mechanism and a driving mechanism, wherein the sliding mechanism is installed in a mounting groove (8) provided on the side wall of one of the support plates (1), and the driving mechanism is installed in a mounting groove (8) provided on the other support plate (1). The spray mechanism is provided with two groups, and the two groups of spray mechanisms are symmetrical and installed horizontally between the sliding mechanism and the driving mechanism.

6. The rapid cooling device for polyester film extrusion according to claim 5, characterized in that: The sliding mechanism comprises a guide rail (61), a slide groove (62) and a slider (63); the guide rail (61) is fixedly mounted in the mounting groove (8) by screws; the slide groove (62) is provided on the side wall of the guide rail (61); the slider (63) is slidably connected in the slide groove (62); one end of the two groups of spray mechanisms is fixedly mounted on the slider (63) respectively.

7. The rapid cooling device for polyester film extrusion according to claim 6, characterized in that: The driving mechanism comprises a first mounting plate (69), a second mounting plate (610), a first screw rod (67), a second screw rod (68), a threaded seat (66) and a servo motor (611), one end of the first screw rod (67) and one end of the second screw rod (68) are fixedly mounted via a flange, and the side wall threads of the first screw rod (67) and the second screw rod (68) are in opposite directions, the threaded seat (66) is respectively threadedly connected to the side walls of the first screw rod (67) and the second screw rod (68), and the side walls of the threaded seat (66) are respectively fixedly mounted on the other side of the spray mechanism. On the end, the other end of the first screw rod (67) is mounted on the bottom surface of the first mounting plate (69) through the bearing seat (3), the first mounting plate (69) is fixedly mounted on the side wall of the mounting groove (8), the other end of the second screw rod (68) is rotatably connected inside the second mounting plate (610), and the other end of the second screw rod (68) is fixedly mounted on the output shaft of the servo motor (611), the servo motor (611) is fixedly mounted on the bottom surface of the second mounting plate (610), and the second mounting plate (610) is mounted on the side wall of the mounting groove (8).

8. The rapid cooling device for polyester film extrusion according to claim 7, characterized in that: The spray mechanism comprises a movable frame (64) and a spray head (65). The two ends of the movable frame (64) are fixedly mounted on a slider (63) and a threaded seat (66) respectively. The bottom surface of the movable frame (64) is equidistantly mounted with a plurality of spray heads (65).

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