Water cooling device for sheet extruder

Abstract

The utility model discloses a water cooling device for a sheet extruder, which comprises a base (1), and a water collecting tank (2) is arranged on the base (1). The water collecting tank (2) is connected with a drain pipe (3) and a water inlet pipe (4); a notch of the water collecting tank (2) is rotatably provided with a plurality of transmission lower pressing rollers (5), the surface of each transmission lower pressing roller (5) is provided with a plurality of annular grooves (6), and each annular groove (6) is filled with a water absorbing cotton sliver (7); a protective frame (18) is arranged above the water collecting tank (2), and a plurality of transmission upper compression rollers (8) are rotationally mounted on the protective frame (18); a spraying pipe (9) is mounted right above every two adjacent transmission upper compression rollers (8); and a plurality of spraying openings (10) are formed in the bottom surface of each spraying pipe (9). The cooling and shaping device not only can ensure the cooling and shaping effect, but also has the advantages of high working efficiency, convenience in use and cleaning and high structural stability.

Description

Technical Field

[0001] This utility model relates to a water-cooled equipment for processing plastic sheets, and in particular a water-cooled device for sheet extruders. Background Technology

[0002] Plastic sheets refer to plastic materials made primarily of resin, with plasticizers, fillers, lubricants, colorants, etc., as auxiliary components. These are produced by heating and melting the resin, then extruding it using a sheet extruder. After extrusion, as described in patent publication number "CN208514941U", the plastic sheet is first pressed into shape by a pressure plate, and then placed in a water-cooling box for cooling and setting. However, in actual use, because extrusion and cooling are separate processes, material transfer is required between them. Combined with the time spent on extrusion and cooling, this consumes a significant amount of time, resulting in low overall efficiency. Furthermore, the plastic sheet remains soft after extrusion and deforms during transfer to the water-cooling box, leading to poor cooling and setting effects. Therefore, existing cooling devices for plastic sheet extrusion processing suffer from poor cooling and setting effects and low efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a water-cooling device for sheet extruders. This invention not only improves the cooling and shaping effect but also has the advantage of high working efficiency.

[0004] The technical solution of this utility model: A water cooling device for a sheet extruder includes a base with a water collection tank on the base; a drain pipe is connected to the inner bottom surface of the water collection tank, and a water inlet pipe is connected to the top of the inner side wall of the water collection tank; multiple evenly distributed drive rollers are rotatably mounted on the opening of the water collection tank, and multiple evenly distributed annular grooves are provided on the surface of each drive roller, with each annular groove filled with absorbent cotton strips; a protective frame is provided above the water collection tank, and a drive roller is rotatably mounted on the protective frame at a position directly above each drive roller. The upper pressure roller is equipped with a spray pipe positioned directly above each pair of adjacent upper pressure rollers. Each spray pipe has multiple evenly distributed spray nozzles on its bottom surface. The spray pipes are used to spray and cool the top surface of the plastic sheet. In conjunction with the water-absorbing cotton strips on the lower pressure roller, the cooling water in the water collection tank is used to cool the bottom surface of the plastic sheet, ensuring a cooling effect. Moreover, the upper and lower pressure rollers can simultaneously perform shaping work on the plastic sheet during the water cooling process, achieving simultaneous water cooling and shaping, thus improving work efficiency.

[0005] In the aforementioned water-cooling device for sheet extruders, a support member is provided on the bottom surface of the water collection tank at a position directly below each drive roller. An arc-shaped cleaning member is provided on the top surface of each support member. Each cleaning member is fitted onto the corresponding drive roller. Multiple evenly distributed bristles are provided on the inner surface of each cleaning member. The support member and the cleaning member can support the drive roller, ensuring the stability of the structure. At the same time, the bristles on the upper surface of the cleaning member can clean some impurities on the surface of the drive roller, ensuring the cooling and shaping effect.

[0006] In the aforementioned water cooling device for the sheet extruder, a temperature sensor is installed on each inner wall of the water collection tank; a first solenoid valve is installed on the water inlet pipe; and a second solenoid valve is installed on the drain pipe. Both the second and first solenoid valves are electrically connected to the temperature sensors. The temperature sensors can detect the temperature of the cooling water in the water collection tank at multiple points, ensuring the accuracy of the detection. Furthermore, by cooperating with the temperature sensors through an external controller, the opening of the first and second solenoid valves can be controlled to achieve the purpose of automatically replacing the cooling water inside the water collection tank, further facilitating its use.

[0007] In the aforementioned water-cooling device for the sheet extruder, multiple evenly distributed hollow tubes are installed on the inner top surface of the protective frame at positions directly above each upper drive roller. Each hollow tube has a scraper connected to its bottom end, which is in contact with the top surface of the upper drive roller. The scraper has multiple water outlet channels communicating with the hollow tubes, and a sponge pad is installed at the bottom end of the scraper. A water pipe for supplying water to the sponge pad is installed inside the hollow tube. The scraper can remove impurities from the surface of the upper drive roller, further ensuring the cooling and shaping effect. The water pipe inside the hollow tube and the water outlet channels on the scraper allow the sponge pad to remove impurities from the upper drive roller while simultaneously using the water in the pipe to cool the surface of the upper drive roller, further ensuring the cooling effect.

[0008] In the aforementioned sheet extruder water cooling device, multiple radially distributed guide plates are installed on the inner wall of the spray nozzle, and each guide plate is coated with a hydrophobic coating. The guide plates enable the water sprayed from the spray nozzle to have multiple directions, thereby maximizing the contact area between the cooling water sprayed from the spray pipe and the sheet and the pressure roller on the drive, ensuring cooling efficiency.

[0009] In the aforementioned sheet extruder with a water-cooling device, the inner bottom surface of the annular groove is coated with an adhesive layer for stably installing the absorbent cotton strip within the annular groove.

[0010] Compared with existing technologies, this utility model improves the existing water cooling device for sheet production. By setting a water collection tank, multiple lower drive rollers, multiple upper drive rollers, and multiple spray pipes on the base, the extruded sheet is conveyed between the lower and upper drive rollers. Then, cooling water from the spray pipes and the water collection tank is used to cool both the upper and lower surfaces of the sheet. Combined with the shaping and transmission effects of the lower and upper drive rollers, this not only improves work efficiency but also ensures effective cooling and shaping. It can achieve automatic material feeding, which is convenient to use; by setting up a water collection tank, it can collect the cooling water sprayed from the spray pipe, and with the protection of the protective frame, it can effectively prevent the cooling water from splashing everywhere, which facilitates subsequent cleaning work; at the same time, by setting multiple evenly distributed annular grooves on the transmission lower pressure roller, each annular groove is equipped with water-absorbing cotton strips. Utilizing the water-absorbing cotton strips, the transmission lower pressure roller can effectively transfer the cooling water in the water collection tank to contact the bottom surface of the sheet, ensuring the cooling effect.

[0011] Furthermore, this invention also incorporates a support component within the water collection tank. A cleaning component, which adheres to the surface of the lower transmission roller, is mounted on the top surface of the support component. This support and cleaning component provide support for the lower transmission roller, ensuring structural stability. Simultaneously, the brush bristles on the surface of the cleaning component clean impurities from the lower transmission roller's surface during rotation, preventing damage to the sheet material due to impurities and ensuring effective cooling and shaping. Additionally, temperature sensors are installed on each inner wall of the water collection tank, allowing for multi-point temperature monitoring of the cooling water. This ensures accurate detection. An external controller, in conjunction with the temperature sensors, controls the opening of the first solenoid valve and the allowable solenoid valve, achieving automatic replacement of the cooling water within the water collection tank, further facilitating the process. This invention utilizes a system with multiple evenly distributed hollow tubes and scrapers on a protective frame. A sponge pad, fitted to the surface of the upper pressure roller, is placed on the bottom of the scraper. This allows the scraper to remove impurities from the upper pressure roller, further ensuring effective cooling and shaping. Furthermore, the water pipes within the hollow tubes and the water outlet channels on the scraper allow the sponge pad to simultaneously remove impurities from the upper pressure roller and cool its surface using the water from the pipes, further enhancing cooling efficiency. Multiple radially arranged guide plates on the spray nozzles direct the water spray in multiple directions, maximizing the contact area between the cooling water and the sheet and the upper pressure roller, ensuring efficient cooling. An adhesive layer within the annular groove allows the absorbent cotton strip to be stably mounted on the lower pressure roller, ensuring structural stability. Therefore, this invention not only guarantees effective cooling and shaping but also offers advantages such as high efficiency, ease of use, convenient cleaning, and high structural stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a side view of the present invention;

[0014] Figure 3 This is a schematic diagram of the hollow tube structure;

[0015] Figure 4 This is a bottom view of the sprinkler pipe;

[0016] Figure 5 This is a schematic diagram of the structure of the transmission lower pressure roller.

[0017] The labels in the attached diagram are as follows: 1-base, 2-water collection tank, 3-drain pipe, 4-water inlet pipe, 5-lower transmission roller, 6-ring groove, 7-absorbent cotton strip, 8-upper transmission roller, 9-spray pipe, 10-spray nozzle, 11-support component, 12-cleaning component, 13-temperature sensor, 14-first solenoid valve, 15-second solenoid valve, 16-hollow pipe, 17-scraper, 18-protective frame, 19-water outlet channel, 20-sponge pad, 21-water pipe, 22-guide plate, 23-adhesive layer. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] Example. The sheet extruder uses a water-cooling device, configured as follows: Figures 1 to 5 As shown, the system includes a base 1, on which a water collection trough 2 is provided; a drain pipe 3 is connected to the inner bottom surface of the water collection trough 2, and a water inlet pipe 4 is connected to the top of the inner side wall of the water collection trough 2; multiple evenly distributed drive rollers 5 are rotatably installed on the opening of the water collection trough 2, and multiple evenly distributed annular grooves 6 are provided on the surface of each drive roller 5, and each annular groove 6 is filled with absorbent cotton strips 7; a protective frame 18 is provided above the water collection trough 2, and a drive roller 8 is rotatably installed on the protective frame 18 at a position directly above each drive roller 5; a spray pipe 9 is installed at a position directly above every two adjacent drive rollers 8, and multiple evenly distributed spray nozzles 10 are provided on the bottom surface of each spray pipe 9.

[0020] A support member 11 is provided on the inner bottom surface of the water collection tank 2 at a position directly below each transmission lower pressure roller 5. Each support member 11 has an arc-shaped cleaning member 12 on its top surface. Each cleaning member 12 is fitted onto its corresponding transmission lower pressure roller 5. Multiple evenly distributed bristles are provided on the inner surface of each cleaning member 12. A temperature sensor 13 is installed on each inner sidewall of the water collection tank 2. A first solenoid valve 14 is installed on the water inlet pipe 4. A second solenoid valve 15 is installed on the drain pipe 3. Both the second solenoid valve 15 and the first solenoid valve 14 are electrically connected to the temperature sensor 13. The inner top surface of the protective frame 18 corresponds to each transmission lower pressure roller 5. Multiple evenly distributed hollow tubes 16 are installed directly above the upper pressure roller 8. The bottom end of each hollow tube 16 is connected to a scraper 17 that is in contact with the top surface of the upper pressure roller 8. The scraper 17 is provided with multiple water outlet channels 19 that communicate with the hollow tubes 16. A sponge pad 20 is installed at the bottom end of the scraper 17. A water pipe 21 for supplying water to the sponge pad 20 is provided inside the hollow tubes 16. Multiple radially distributed guide plates 22 are installed on the inner side wall of the spray nozzle 10. The surface of each guide plate 22 is coated with a hydrophobic coating. An adhesive layer 23 for stably installing the absorbent cotton strip 7 in the annular groove 6 is coated on the inner bottom surface of the annular groove 6.

[0021] Working principle: In actual use, firstly, open the first solenoid valve 14 and close the second solenoid valve 15. A certain amount of cooling water is input into the water collection tank 2 through the water inlet pipe 4, so that the cooling water in the water collection tank 2 can cover the bottom surface of the lower transmission roller 5 (covering one-third of the lower transmission roller 5). After enough cooling water is added to the water collection tank 2, connect the entire device to the external mains power, so that the temperature sensor 13 is powered on and started. Then, the plastic sheet that needs to be cooled and shaped is fed between the lower transmission roller 5 and the upper transmission roller 8, and cooling water is input into the spray pipe 9 through the external water supply device. As the plastic sheet is pushed forward by the external force, it can drive the lower transmission roller 5 and the upper transmission roller 8 to rotate. The rotation of the lower transmission roller 5 and the upper transmission roller 8 can assist in pushing the sheet to move, which is convenient for use.

[0022] Simultaneously, after the external water supply device inputs cooling water into the spray pipe 9, the cooling water is sprayed onto the upper pressure roller 8 and the upper surface of the plastic sheet through the spray nozzle 10. The cooling water sprayed onto the upper pressure roller 8 not only cools the surface of the upper pressure roller 8, but also moves along the upper pressure roller 8 to the surface of the plastic sheet, thus ensuring the cooling and shaping effect of the upper pressure roller 8 on the upper surface of the plastic sheet. During the rotation of the lower pressure roller 5, the absorbent cotton strip 7 on the lower pressure roller 5 uses its own water absorption and storage effect to carry the cooling water in the water collection tank 2 to the lower pressure roller 5, and as the lower pressure roller 5 rotates, it contacts the bottom surface of the plastic sheet, thus completing the cooling work on the bottom surface of the plastic sheet. While cooling the plastic sheet, the upper pressure roller 8 also cools the plastic sheet. The moving upper pressure roller 8 and the driving lower pressure roller 5 can cooperate to shape the plastic sheet, achieving simultaneous cooling and shaping, which improves work efficiency and ensures the cooling and shaping effect. At the same time, cooling water is introduced into the water pipe 21, and the cooling water entering the water pipe 21 will enter the hollow space in the hollow pipe 16. The cooling water entering the hollow space will then flow through the water outlet 19 to the sponge pad 20. Thus, the cooperation between the sponge pad 20 and the driving upper pressure roller 8 can coat the surface of the driving upper pressure roller 8 with cooling water, thereby cooling the driving upper pressure roller 8. At the same time, the sponge pad 20 can also clean the impurities adhering to the surface of the driving upper pressure roller 8, thereby avoiding the presence of impurities that may cause the plastic sheet to be squeezed, damaged, or dented, thus ensuring the shaping effect.

[0023] Similarly, during the rotation of the lower pressure roller 5, its surface comes into contact with the bristles on the top surface of the cleaning component 12. The bristles clean the surface of the lower pressure roller 5, preventing impurities from causing damage or dents to the plastic sheet and ensuring a good shaping effect. Throughout the process, the cooling water on the upper pressure roller 8 and the surface of the plastic sheet slowly flows into the water collection tank 2. At this time, the water temperature in the water collection tank 2 gradually rises, and the temperature sensor 13 sends the detected water temperature signal to an external controller (the controller used in this application can be specifically installed on the side of the base and can be of models such as FX2C-20MRD, Cortex-R8, or Cortex-M7). The programmable controller (PCC); the temperature sensor 13 can specifically be model D6T-44L-06, D6T-8L-09, or D6T-1A-02, etc.). The controller will display the received temperature signal on its built-in display screen and compare it with the internally set temperature threshold. When the received temperature signal exceeds the temperature threshold, the controller will determine that the internal cooling water needs to be replaced. At this time, the controller will automatically control the first solenoid valve 14 and the second solenoid valve 15 to open and replace the cooling water, or send a signal to the external operator, who can then stop the machine and control the opening and closing of the first solenoid valve 14 and the second solenoid valve 15 to replace the cooling water in the water collection tank 2.

Claims

1. Water cooling device for sheet extruders, characterized in that: The utility model provides a kind of cotton yarn cleaning device, including base (1), and water collecting tank (2) is equipped on base (1);Water collecting tank (2) inner bottom is connected with drain pipe (3), and the top end portion of water collecting tank (2) inner side wall is connected with water inlet pipe (4);The mouth of water collecting tank (2) is rotatably installed with multiple evenly distributed transmission lower press roller (5), and the surface of each transmission lower press roller (5) is equipped with multiple evenly distributed ring groove (6), and each ring groove (6) is filled with water-absorbing cotton (7);The upper portion of water collecting tank (2) is provided with protective frame (18), and protective frame (18) is rotatably installed with transmission upper press roller (8) above each transmission lower press roller (5);The position of each adjacent two transmission upper press roller (8) is rotatably installed with spray pipe (9) on the inner top surface of protective frame (18), and the bottom surface of each spray pipe (9) is equipped with multiple evenly distributed spray port (10).

2. The water cooling device for sheet extruder according to claim 1, characterized by: The inner bottom of water collecting tank (2) is provided with support (11) above each transmission lower press roller (5), and the top surface of each support (11) is provided with arc-shaped cleaning part (12);Each cleaning part (12) is sleeved on corresponding transmission lower press roller (5);The inner surface of each cleaning part (12) is equipped with multiple evenly distributed bristles.

3. The water cooling device for sheet extruder according to claim 1, characterized by: Temperature sensor (13) is installed on each inner side wall of water collecting tank (2);First electromagnetic valve (14) is installed on water inlet pipe (4);Second electromagnetic valve (15) is installed on drain pipe (3), and second electromagnetic valve (15) and first electromagnetic valve (14) are electrically connected with temperature sensor (13).

4. The water cooling device for sheet extruder according to claim 1, characterized by: The inner top surface of protective frame (18) is provided with multiple evenly distributed hollow pipes (16) above each transmission upper press roller (8), and the bottom end portion of each hollow pipe (16) is connected with scraper (17) that is attached to the top surface of transmission upper press roller (8);Scraper (17) is provided with multiple water outlet channels (19) that are communicated with hollow pipe (16), and the bottom end portion of scraper (17) is installed with sponge pad (20);Water pipe (21) is arranged in hollow pipe (16) for supplying water to sponge pad (20).

5. The water cooling device for sheet extruder according to claim 1, characterized by: The inner side wall of spray port (10) is installed with multiple radially distributed guide vanes (22), and the surface of each guide vane (22) is coated with hydrophobic coating.

6. The water cooling device for sheet extruder according to any one of claims 1 to 5, characterized by: The inner bottom of ring groove (6) is coated with adhesive layer (23) for stabilizing water-absorbing cotton (7) in ring groove (6).

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