A cooling device for plastic sheet material

Abstract

The utility model discloses a kind of cooling device for plastic sheet board, it includes bottom plate, fixedly installed with conveying mechanism and air cooling mechanism on bottom plate, the upper surface of bottom plate is fixedly connected with two side plates, the upper surface of two side plates is fixedly connected with U-shaped plate, the upper surface of U-shaped plate is fixedly connected with water storage tank, the left and right two outlets of water storage tank are fixedly connected with the input end of cooling pump, the output end of two cooling pumps is fixedly communicated with annular main pipe through water outlet pipe, the inside of annular main pipe is fixedly communicated with elbow pipe, the junction of annular main pipe is provided first valve, second valve, third valve and fourth valve. Through the above structure, through two-way parallel pipeline design, with two groups of collaborative valve control independent pipeline, when fault, it can be quickly switched, without whole machine downtime, to ensure production continuity. In addition, through water cooling and air cooling cooperation, the uniform cooling of board, improve the promotion cooling coverage effect.

Description

Technical Field

[0001] This utility model relates to the field of cooling device technology, and in particular to a cooling device for plastic sheets and plates. Background Technology

[0002] In the plastics processing industry, the molding and processing of plastic sheets is one of the core production links. Its process typically includes key steps such as raw material melting, extrusion molding, calendering, and cooling and setting. Among these, the cooling and setting stage directly determines the final physical properties and appearance quality of the plastic sheets, having a decisive impact on subsequent processing and product application. As downstream industries continuously increase their precision requirements for plastic sheets, and as production lines become increasingly automated and faster, traditional cooling devices are gradually experiencing problems and are struggling to meet the demands of modern production.

[0003] Currently, the mainstream plastic sheet cooling devices on the market are mainly divided into two categories: single air-cooling and single water-cooling. Single air-cooling devices typically achieve cooling by blowing ambient or low-temperature airflow onto the surface of the molded sheet using a fan. While simple in structure and low in maintenance costs, their cooling efficiency is relatively low, and the airflow distribution on the sheet surface is easily affected by the air duct design, leading to uneven cooling. This is especially problematic for thicker or wider sheets, where excessive temperature differences between the surface and interior can occur, potentially causing defects such as warping and cracking. Furthermore, the air-cooling effect is significantly affected by ambient temperature; its performance decreases considerably in high-temperature production workshops, making it difficult to guarantee stable cooling quality.

[0004] In addition, most existing water cooling devices use a single-circuit pipeline, with all cooling components connected in series or parallel in the same pipeline system. When the pipeline is blocked, leaked, or the valve fails, the machine must be shut down for maintenance, which will cause the entire production line to be interrupted, seriously affecting the continuity of production and increasing production time costs and downtime losses.

[0005] Therefore, with the increasing demands for production efficiency and product qualification rates in the plastics processing industry, there is a need for a cooling device for plastic sheets and plates that features a dual-parallel pipeline design and a highly efficient synergistic cooling mechanism. On the one hand, this can solve the downtime problem caused by failures in traditional single-pipeline systems, ensuring continuous operation of the production line. On the other hand, it can optimize the synergistic effect of air cooling and water cooling, improving cooling coverage and temperature control accuracy, and avoiding product defects caused by uneven cooling. Utility Model Content

[0006] The purpose of this invention is to provide a cooling device for plastic sheets and plates to solve the problems mentioned in the background art.

[0007] This utility model also provides a cooling device for plastic sheets and plates as described above, comprising: a base plate, on which a conveying mechanism and a cooling mechanism are fixedly installed; two symmetrically distributed side plates are fixedly connected to the upper surface of the base plate; a U-shaped plate is fixedly connected to the upper surface of the two side plates; a water storage tank is fixedly connected to the upper surface of the U-shaped plate; a cooler is installed inside the water storage tank; the left and right outlets of the water storage tank are fixedly connected to the input end of a cooling pump; the output ends of the two cooling pumps are fixedly connected to an annular main pipe through a water outlet pipe; a bent pipe is fixedly connected inside the annular main pipe; and a first valve, a second valve, a third valve, and a fourth valve are provided at the connection point of the annular main pipe.

[0008] Preferably, the conveying mechanism includes a mesh conveyor belt, a roller, and a drive motor. The mesh conveyor belt is connected to the roller, the central shaft of the roller is fixedly connected to the output end of the drive motor, and the drive motor is fixedly mounted on the side plate.

[0009] Preferably, a roller is rotatably connected between the two side plates, and there are multiple rollers distributed symmetrically.

[0010] Preferably, the annular main pipe is externally connected to two water inlet pipes, and the two water inlet pipes are respectively fixedly connected to the two input ends of the circulation pump, and the output end of the circulation pump is fixedly connected to the water storage tank.

[0011] Preferably, a sealing block is provided inside the annular main pipe located between the inlet pipe and the outlet pipe.

[0012] Preferably, the air-cooling mechanism includes a cooler and an air duct, and the outlet of the cooler is fixedly connected to a flow equalization plate through the air duct, and the flow equalization plate is fixedly installed on the base plate.

[0013] Preferably, the flow equalization disk has a plurality of evenly distributed air holes inside, and axially symmetrically distributed guide vanes are arranged below the air holes.

[0014] Preferably, the side plate has an internal groove, and an arc-shaped baffle is engaged with the internal groove. There are two arc-shaped baffles located on both sides of the bottom plate.

[0015] Compared with existing technologies, the advantages of this invention are as follows: The combination of a ring-shaped main pipe and a bent pipe allows for flexible arrangement of the bent pipe according to the conveying path of the plastic sheet, achieving multi-directional wrapping cooling by conforming to the sheet's transport trajectory. This effectively expands the contact area between the cooling medium and the sheet, improving the comprehensiveness of cooling coverage. Furthermore, if one set of pipes is damaged, operators can quickly activate another backup set of pipes by switching valve states, restoring cooling operations without shutdown for maintenance. This greatly reduces the risk of production interruption and effectively improves the continuity and stability of equipment operation.

[0016] This device overcomes the limitations of a single cooling mode by constructing a dual cooling system of water cooling and air cooling. The cooler in the water tank ensures the water cooling medium maintains a stable low temperature, which is then precisely delivered to the surface of the sheet material via dual pipelines for rapid cooling. Simultaneously, the air cooling mechanism on the base plate operates in tandem, blowing air across the sheet material surface to accelerate water vapor evaporation and heat dissipation. The two cooling methods complement each other: water cooling handles the core cooling, while air cooling optimizes the heat dissipation environment. This effectively avoids the problems of uneven cooling due to localized liquid accumulation and slow cooling speed associated with water cooling alone, as well as the issues of slow cooling speed with air cooling alone. It significantly improves cooling efficiency and the uniformity of sheet material cooling, reducing defects such as warping and deformation caused by temperature differences. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a complete structural diagram of the cooling device for plastic sheets and plates according to this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the cooling device for plastic sheets and plates according to this utility model;

[0020] Figure 3 This is a structural diagram of the water-cooling circulation mechanism of the cooling device for plastic sheets and plates according to this utility model;

[0021] Figure 4 This is a structural diagram of the conveying mechanism of the cooling device for plastic sheets and plates according to this utility model;

[0022] Figure 5 This is a structural diagram of the air-cooling mechanism of the cooling device for plastic sheets and plates according to this utility model;

[0023] Figure 6 This is a structural diagram of the internal structure of the flow equalization plate in the cooling device for plastic sheets and plates according to this utility model.

[0024] Figure 7 This is a structural diagram of the base plate and side plate of the cooling device for plastic sheets and plates according to this utility model.

[0025] Legend:

[0026] 1. Base plate; 2. Conveying mechanism; 201. Mesh conveyor belt; 202. Roller; 203. Drive motor; 3. Air cooling mechanism; 301. Air cooler; 302. Air duct; 303. Flow distribution plate; 3031. Air hole; 3032. Guide vane; 4. Side plate; 401. Groove; 402. Arc baffle; 5. U-shaped plate; 6. Water storage tank; 7. Cooler; 8. Cooling pump; 9. Water outlet pipe; 10. Annular main pipe; 11. Bent pipe; 12. First valve; 13. Second valve; 14. Third valve; 15. Fourth valve; 16. Water inlet pipe; 17. Circulation pump; 18. Sealing block. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] The present invention will be further described in detail below with reference to embodiments:

[0029] Example 1

[0030] like Figure 1-7 As shown in the figure, a cooling device for plastic sheets and plates according to an embodiment of the present invention includes: a base plate 1, on which a conveying mechanism 2 and a wind-cooling mechanism 3 are fixedly installed; two symmetrically distributed side plates 4 are fixedly connected to the upper surface of the base plate 1; a U-shaped plate 5 is fixedly connected to the upper surface of the two side plates 4; a water storage tank 6 is fixedly connected to the upper surface of the U-shaped plate 5; a cooler 7 is provided inside the water storage tank 6; the left and right outlets of the water storage tank 6 are both fixedly connected to the input end of a cooling pump 8; the output ends of the two cooling pumps 8 are both fixedly connected to an annular main pipe 10 through a water outlet pipe 9; a bent pipe 11 is fixedly connected inside the annular main pipe 10; and a first valve 12, a second valve 13, a third valve 14, and a fourth valve 15 are provided at the connection point of the annular main pipe 10.

[0031] The conveying mechanism 2 includes a mesh conveyor belt 201, rollers 202, and a drive motor 203. The mesh conveyor belt 201 is driven by the rollers 202. The output end of the drive motor 203 is fixedly connected to the central shaft of the rollers 202. The drive motor 203 is fixedly mounted on the side plate 4. Rollers 202 are rotatably connected between the two side plates 4. There are multiple rollers 202 and they are symmetrically distributed. The annular main pipe 10 is externally connected to two water inlet pipes 16. The two water inlet pipes 16 are respectively fixedly connected to the two input ends of the circulation pump 17. The output end of the circulation pump 17 is fixedly connected to the water storage tank 6. The water inlet pipes 16 are located on the water inlet pipes 16. A sealing block 18 is provided inside the annular main pipe 10 between the water outlet pipe 9 and the main pipe 9; the air-cooling mechanism 3 includes a cooler 301 and an air duct 302. The outlet of the cooler 301 is fixedly connected to a flow equalization plate 303 through the air duct 302. The flow equalization plate 303 is fixedly installed on the base plate 1. The flow equalization plate 303 is provided with a number of evenly distributed air holes 3031 inside. Below the air holes 3031, there are axisymmetrically distributed guide vanes 3032. The side plate 4 is provided with a groove 401 inside. An arc-shaped baffle 402 is engaged inside the groove 401. There are two arc-shaped baffles 402 located on both sides of the base plate 1.

[0032] In this embodiment, the plastic sheet to be cooled is first placed on the mesh conveyor belt 201. The drive motor 203 is started to drive the roller 202, causing the mesh conveyor belt 201 to rotate and transport the sheet to be cooled. At the same time, the cooler 7 in the water tank 6 pre-cools the coolant. Then, the cooling pump 8 pressurizes and delivers it to the annular main pipe 10. The first valve 12 and the third valve 14 work together in a coordinated manner, and the second valve 13 and the fourth valve 15 work together in a cooperative manner. Either set of valves can be kept open during use, while the other set is closed, so that if one set of pipes has a problem, the other set of pipes can operate normally. After flow control, the coolant in the bent pipe 11 exchanges heat with the sheet to cool it down. The annular main pipe 10 between the inlet pipe 16 and the outlet pipe 9 is sealed by the sealing block 18 to prevent the outflowing and returning coolant from interfering with each other. The circulation pump 17 pumps the heated coolant back to the water tank 6, and the cooler 7 cools it down again to achieve circulation. In addition, the air cooler 301 generates a low-temperature airflow, which enters the flow equalization plate 303 through the air duct 302. Together with the guide vanes 3032 and the air holes 3031, the cold airflow is evenly blown onto the plate for auxiliary cooling. The arc-shaped baffles 402 on both sides can reduce airflow loss. Through the synergy of various systems, the plate is cooled efficiently.

[0033] Example 2

[0034] like Figure 1-7As shown in the figure, this utility model embodiment discloses a cooling device for plastic sheets, which includes a base plate 1. A conveying mechanism 2 and a wind-cooling mechanism 3 are fixedly installed on the base plate 1. Two symmetrically distributed side plates 4 are fixedly connected to the upper surface of the base plate 1. A U-shaped plate 5 is fixedly connected to the upper surface of the two side plates 4. A water storage tank 6 is fixedly connected to the upper surface of the U-shaped plate 5. First, the cooler 7 inside the water storage tank 6 is started in advance to cool the coolant stored in the tank, ensuring that the initial temperature of the coolant meets the cooling requirements. Then, the sheet to be cooled is placed on the mesh conveyor belt 201. The drive motor 203 is started to drive the roller 202, causing the mesh conveyor belt 201 to move, thereby transporting the sheet to the cooling area. At the same time, the cooling pumps 8 at the left and right outlets of the water storage tank 6 are started to draw low-temperature coolant from the water storage tank 6 and pressurize and transport it to the annular main pipe 10 through the outlet pipe 9.

[0035] It should be noted that the annular main pipe 10 is an annular stainless steel pipe that surrounds the plate in the water-cooled area. There are four control valves on the pipe: valve 12, valve 13, valve 14, and valve 15. Valve 12 and valve 14 form group A of the pipeline control valves, and valve 13 and valve 15 form group B of the pipeline control valves. The two groups of valves are symmetrically distributed and correspond to two independent coolant flow branches. During normal operation of the device, the operator can choose to open one group of valves and close the other group.

[0036] After the coolant enters the bent pipe 11 from the annular main pipe 10, it exchanges heat with the plate, absorbing heat and increasing in temperature. It then flows through the annular main pipe 10 to the inlet pipe 16. The circulation pump 17 starts, causing the heated coolant to flow back to the storage tank 6 for further cooling. The coolant exchanges heat again with the cooler 7, becoming a low-temperature coolant that can be drawn out again by the cooling pump 8 for further cooling, forming a closed-loop coolant circulation system. This reduces coolant consumption and lowers the operating cost of the equipment.

[0037] It should be noted that the sealing block 18 inside the annular main pipe 10 located between the inlet pipe 16 and the outlet pipe 9 can prevent interference with the coolant during the flow process, so that the coolant can flow out from the outlet pipe 9 and flow back into the water tank 6 through the inlet pipe 16 for a new round of cooling, ensuring that the coolant always flows stably in the preset direction and avoiding the impact of backflow on cooling efficiency.

[0038] At the same time, the air cooler 301 in the air-cooling mechanism 3 starts, generating a low-temperature airflow. The low-temperature airflow is delivered to the flow equalization plate 303 through the air duct 302. The axisymmetrically distributed guide vanes 3031 inside the plate can evenly disperse the airflow delivered by the air duct 302, so that the airflow blows onto the plastic sheet on the mesh conveyor belt 201 at a stable and uniform speed. The uniform low-temperature airflow directly removes the heat from the surface of the sheet and accelerates the evaporation of the coolant remaining on the surface of the sheet. The evaporation absorbs heat and further reduces the temperature of the sheet, while avoiding the impact of coolant residue on the subsequent processing of the sheet.

[0039] The two arc-shaped baffles 402 that engage in the groove 401 of the side plate 4 are located on both sides of the bottom plate 1, which can block external airflow interference and concentrate the low-temperature airflow blown out by the flow equalization plate 303 in the cooling area, reducing airflow loss and improving air cooling efficiency.

[0040] Example 3

[0041] like Figure 1-7 As shown in the figure, this utility model provides a cooling device for plastic sheets, which includes an annular main pipe 10 with a bent pipe 11 fixedly connected inside. A first valve 12, a second valve 13, a third valve 14, and a fourth valve 15 are installed at the connection of the annular main pipe 10. Any set of valves can be selected to form a circulating cooling pipeline. When set A valves are selected, the first valve 12 and the third valve 14 are fully opened, while the second valve 13 and the fourth valve 15 are closed. At this time, the low-temperature coolant enters the annular main pipe 10 from the outlet pipe 9 and flows only along the A-group branch, cooling the sheet through the bent pipe 11 connected to the branch. When a blockage or leak occurs in the A-group pipeline, the operator can quickly close the A-group valves and open the B-group valves, switching the coolant flow to the B-group branch without stopping the device operation, greatly improving the continuous operation capability of the equipment and reducing production interruption losses. The annular main pipe 10 has a fixedly connected curved pipe 11 inside, which is attached to the bottom of the mesh conveyor belt 201. When the low-temperature coolant flows in the curved pipe 11, it exchanges heat with the high-temperature plate through the mesh conveyor belt 201, quickly absorbing the heat on the surface of the plate and causing the plate temperature to drop significantly.

[0042] It should be noted that, in addition to the branch switching function, the flow rate of coolant in the pipeline can be changed by adjusting the opening degree of the valve. For thicker plates with higher temperatures, the valve opening can be increased to increase the flow rate and enhance the heat exchange effect. For some thin plates, the opening degree can be decreased to reduce the flow rate and avoid energy waste, thus enabling precise adjustment of the cooling process.

[0043] Example 4

[0044] like Figure 1-7As shown in the figure, this utility model embodiment provides a cooling device for plastic sheets. For sheets with large thickness and high temperature, the water cooling system completes the core cooling of the sheet while the air cooling system immediately starts the auxiliary cooling process. The air cooling system enhances the cooling effect and removes residual moisture from the surface of the sheet through low-temperature airflow. The coordinated operation of the air cooling system and the conveying system achieves efficient cooling of the sheet.

[0045] The evaporative air cooler 301, acting as an airflow generator, employs scroll compression refrigeration technology. Upon startup, its internal compressor operates rapidly, absorbing heat from the surrounding air through a refrigerant phase change cycle, cooling the ambient air into a low-temperature airflow. The airflow output of the evaporative air cooler 301 can be adjusted according to the cooling requirements of the sheet material, ensuring sufficient cooling capacity. The cooled airflow then enters the flow equalization plate 303 through the duct 302. Located directly below the mesh conveyor belt 201, the flow equalization plate 303 transforms the concentrated airflow conveyed by the duct 302 into a uniformly distributed planar airflow through guide vanes, which then flows out through uniformly distributed air holes, ensuring consistent cooling across all parts of the sheet material.

[0046] It should be noted that the guide vanes 3032 are axially symmetrically distributed inside the flow equalization disk 303, made of arc-shaped thin steel plates, and welded to the internal support to form multiple radial airflow guiding channels. When the low-temperature airflow enters the flow equalization disk 303, it is first divided into multiple branches by the central guide vanes, and then diffuses towards the edge area of ​​the flow equalization disk 303 along the guidance of the arc-shaped vanes, breaking the concentrated airflow pattern and avoiding the problem of strong airflow in the center and weak airflow at the edge. The side of the flow equalization disk 303 facing the grid conveyor belt 201 is covered with air holes 3031. The airflow distributed by the guide vanes 3032 is blown vertically upwards onto the plate at a uniform flow rate through these dense air holes 3031. The distribution density of the air holes 3031 has been optimized, with slightly more air holes in the edge area than in the center area, further compensating for the pressure loss during the airflow diffusion process and ensuring that the entire plate surface receives uniform airflow.

[0047] Example 5

[0048] like Figure 1-7 As shown in the figure, this utility model embodiment provides a cooling device for plastic sheets. Arc-shaped baffles 402 are installed on the front and rear sides of the mesh conveyor belt 201, and are secured by locking grooves 401 on the side plates 4, requiring no additional connectors and facilitating disassembly and maintenance. The baffles are made of engineering plastic, and their arc-shaped structure is optimized for fluid dynamics. The inner arc surface faces the center of the conveyor belt, and the bottom is tightly fitted with the base plate 1, forming a closed airflow space.

[0049] When the low-temperature airflow blown out by the flow equalization plate 303 acts on the surface of the plate, some of the airflow will diffuse to both sides of the conveyor belt. The arc-shaped baffle 402 can effectively block this diffused airflow and reflect it back to the surface of the plate, preventing the airflow from being directly lost into the environment. In addition, it can also effectively prevent external airflow from interfering with the stability of the low-temperature airflow and ensure that the cooling process is controllable.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A cooling device for plastic sheets, comprising: The base plate (1) is characterized in that a conveying mechanism (2) and a cooling mechanism (3) are fixedly installed on the base plate (1), two symmetrically distributed side plates (4) are fixedly connected to the upper surface of the base plate (1), a U-shaped plate (5) is fixedly connected to the upper surface of the two side plates (4), a water storage tank (6) is fixedly connected to the upper surface of the U-shaped plate (5), and a cooler (7) is provided inside the water storage tank (6). The left and right outlets of the water storage tank (6) are fixedly connected to the input end of the cooling pump (8), and the output ends of the two cooling pumps (8) are fixedly connected to the annular main pipe (10) through the water outlet pipe (9). The inside of the annular main pipe (10) is fixedly connected to the bent pipe (11), and the connection of the annular main pipe (10) is provided with a first valve (12), a second valve (13), a third valve (14) and a fourth valve (15).

2. The cooling device for plastic sheets and plates according to claim 1, characterized in that, The conveying mechanism (2) includes a mesh conveyor belt (201), a roller (202) and a drive motor (203). The mesh conveyor belt (201) is connected to the roller (202) in a transmission manner. The output end of the drive motor (203) is fixedly connected to the central shaft of the roller (202). The drive motor (203) is fixedly installed on the side plate (4).

3. A cooling device for plastic sheets and plates according to claim 2, characterized in that, A roller (202) is rotatably connected between the two side plates (4), and there are multiple rollers (202) symmetrically distributed.

4. A cooling device for plastic sheets and plates according to claim 1, characterized in that, The annular main pipe (10) has two fixed external water inlet pipes (16), and the two water inlet pipes (16) are respectively fixedly connected to the two input ends of the circulation pump (17), and the output end of the circulation pump (17) is fixedly connected to the water storage tank (6).

5. A cooling device for plastic sheets and plates according to claim 4, characterized in that, A sealing block (18) is provided inside the annular main pipe (10) located between the water inlet pipe (16) and the water outlet pipe (9).

6. A cooling device for plastic sheets and plates according to claim 1, characterized in that, The air-cooling mechanism (3) includes a cooler (301) and an air duct (302). The outlet of the cooler (301) is fixedly connected to a flow equalization plate (303) through the air duct (302). The flow equalization plate (303) is fixedly installed on the base plate (1).

7. A cooling device for plastic sheets and plates according to claim 6, characterized in that, The flow equalization disk (303) has a plurality of uniformly distributed air holes (3031) inside, and axially symmetrically distributed guide vanes (3032) are arranged below the air holes (3031).

8. A cooling device for plastic sheets and plates according to claim 1, characterized in that, The side plate (4) has a groove (401) inside, and an arc-shaped baffle (402) is engaged inside the groove (401). There are two arc-shaped baffles (402) located on both sides of the bottom plate (1).

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