A plastic mat extrusion molding cooling device

Abstract

The present application relates to the technical field of plastic forming, in particular to a plastic pad extrusion forming cooling device, which comprises a stand, a fixed cylinder, a roller, a spiral sleeve and a detection assembly. In the present application, the roller is divided into multiple cooling cavities for separate water supply, and water is supplied to the cooling cavities at the same time, thereby reducing the problem of uneven cooling caused by water flow. Secondly, the spiral sleeve forces the cooling water to form turbulent flow, which improves the cooling efficiency compared to the smooth laminar heat exchange. Then, the detection assembly is used to detect the cooling temperature in real time and perform external supplementary cooling according to the situation, thereby forming a way of multiple cooling cavities for separate water supply for turbulent cooling and external supplementary cooling. The uniform cooling degree of the plastic pad is improved in all aspects, and quality problems such as warping deformation and concave shrinkage of the plastic pad caused by uneven cooling are avoided.

Description

Technical Field

[0001] This invention relates to the field of plastic molding technology, specifically to a cooling device for plastic pad extrusion molding. Background Technology

[0002] Plastic mats are typically produced using a process of extrusion, calendering, cooling, and cutting. The main process involves extruding hot-melt plastic granules through an extruder and forming the initial plastic mat into a mat shape using a mold. Since the sheet blanks that have just come out of the mold are at a very high temperature, they are in a plastic state and have a very rough surface.

[0003] Currently, a three-roll calender is commonly used to calender, shape, and cool the plastic sheet. The sheet passes through the gap between three precision-machined rollers, precisely controlling the final thickness of the plastic pad. The three rollers in the three-roll calender are hollow inside, and the plastic pad is cooled by pouring a cooling medium (usually water) along the axis inside the rollers. After passing through the three-roll calender, the sheet passes through a long cooling conveyor section for thorough and uniform cooling.

[0004] The following problems exist in the existing cooling process: Since the cooling medium is poured into the roller along the axial direction, some of the water has already begun to cool down during the flow. Therefore, the cooling water that comes into contact with the rear part of the plastic pad has already passed through the front part of the plastic pad for heat transfer and cooling. As a result, the cooling effect of each roller on the plastic pad is uneven, and uneven cooling can easily lead to quality problems such as warping, deformation, and sink marks on the plastic pad. Summary of the Invention

[0005] Therefore, it is necessary to provide a cooling device for extruding plastic pads, which aims to solve the problems of the prior art.

[0006] This application provides a cooling device for extrusion molding of plastic pads, including: a stand, on which three fixed cylinders are fixedly arranged from top to bottom and whose axes extend from front to back, and rollers are fixedly sleeved on the fixed cylinders. A compression mold is arranged on the left side of the area between the two upper rollers, and an adhesive layer is rotatably sleeved on the outside of the rollers.

[0007] The front end face of the fixed cylinder has an inlet channel and the rear end face has an outlet channel, with the outlet channel located above the inlet channel.

[0008] Two partition plates are fixedly sleeved on the fixed cylinder, which divide the inner cavity of the roller into three cooling chambers distributed front and back. The inlet channel and outlet channel are both connected to the cooling chambers.

[0009] Each cooling chamber is fixedly provided with a spiral sleeve, and the outer arc-shaped surface of the spiral sleeve is provided with a spiral-shaped guide groove. A transition cavity is formed between the spiral sleeve and the corresponding fixed cylinder within the corresponding cooling chamber.

[0010] The two lower rollers are equipped with detection components for detecting and adjusting the temperature of the corresponding cooling chamber.

[0011] During cooling, the inlet channel pumps water into the three cooling chambers simultaneously, while each cooling chamber pumps water into its own guide channel. At the same time, the cooling temperature is monitored and adjusted in real time by the detection component, ultimately forming a cooling operation with overall zoned water supply and spiral-guided water flow for uniform cooling in each cooling chamber.

[0012] According to an advantageous embodiment, a toothed ring is fixedly provided on the front end face of the bonding layer, and a gear that meshes with the toothed ring is rotatably provided on the front end face of the roller via a rotating shaft.

[0013] According to an advantageous embodiment, the infeed channel extends from the front side of the fixed cylinder to the rear side of the roller, and the outfeed channel extends from the front partition plate to the rear end face of the fixed cylinder.

[0014] The lower side of the fixed cylinder has multiple liquid outlets that run from front to back and are connected to the inlet channel.

[0015] According to an advantageous embodiment, the outlet is provided with a pressure-compensated water outlet for controlling the water outflow process in each cooling chamber.

[0016] According to an advantageous embodiment, the guide groove on the spiral sleeve and the inner wall of the roller together form a spiral cavity, and the top of the spiral sleeve is provided with multiple flow ports connecting the spiral cavity and the transition cavity.

[0017] A flow tube is fixedly installed between the spiral sleeve and the fixed sleeve, located in the corresponding transition cavity. The flow tube connects the spiral cavity and the outgoing channel.

[0018] According to an advantageous embodiment, an annular cavity is formed in the area where the partition plate contacts the inside of the roller, and two vertical cavities are formed in the partition plate, which are symmetrically arranged vertically, with the lower vertical cavity communicating with the inlet channel and the upper vertical cavity communicating with the outlet channel.

[0019] According to an advantageous embodiment, the detection assembly includes an inner cylinder, with an inner cylinder extending longitudinally through the two lower rollers. The portion of the inner cylinder located within the cooling chamber is equipped with multiple temperature sensors that are equidistantly distributed longitudinally.

[0020] According to an advantageous embodiment, the front and rear sides of the inner cylinder are both open, and the front and rear sides of the inner cylinder are connected to the external pipe flange.

[0021] According to an advantageous embodiment, the middle inner tube is located to the left of the adjacent fixed tube, and the lower inner tube is located to the right of the adjacent fixed tube.

[0022] In summary, the present invention has the following beneficial effects: By dividing the roller into multiple cooling chambers with separate water supply and simultaneously supplying water to the cooling chambers, the problem of uneven cooling caused by water flow is reduced. Secondly, the spiral sleeve forces the cooling water to form turbulence, which improves the cooling efficiency compared to the gentle laminar heat exchange. Then, the detection component detects the cooling temperature in real time and provides external supplementary cooling as needed. This forms a system of multiple cooling chambers with separate water supply for turbulent cooling and external supplementary cooling, which comprehensively improves the uniformity of cooling of the plastic pad and avoids quality problems such as warping, deformation, and sink marks caused by uneven cooling. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A three-dimensional structural schematic diagram of a plastic pad extrusion molding cooling device provided according to an embodiment of the present invention is shown.

[0025] Figure 2 A front view of the roller, the fixing cylinder, and the bonding layer provided according to an embodiment of the present invention is shown.

[0026] Figure 3 A three-dimensional structural diagram of the roller, fixing cylinder and bonding layer provided according to an embodiment of the present invention is shown.

[0027] Figure 4 A partial cross-sectional left view of the area between the lowermost roller, the spiral sleeve, and the partition plate provided according to an embodiment of the present invention is shown.

[0028] Figure 5 A partial cross-sectional left view of the area between the lowermost roller, the fixed cylinder, and the partition plate provided according to an embodiment of the present invention is shown.

[0029] Figure 6 A partial cross-sectional perspective view of the spiral sleeve, fixed sleeve, and partition plate provided according to an embodiment of the present invention is shown.

[0030] Figure 7 A cross-sectional perspective view of the three-dimensional structure of a roller, an inner cylinder, and a partition plate provided according to an embodiment of the present invention is shown.

[0031] The above-mentioned attached drawings include the following reference numerals: 1. Frame; 2. Fixed cylinder; 3. Roller; 30. Adhesive layer; 31. Cooling chamber; 32. Spiral sleeve; 33. Guide groove; 34. Transition chamber; 35. Gear ring; 350. Gear; 36. Liquid outlet; 360. Pressure-compensated water outlet; 37. Spiral cavity; 370. Flow port; 38. Flow cylinder; 4. Inlet channel; 5. Outlet channel; 6. Partition plate; 60. Ring cavity; 61. Vertical cavity; 7. Detection component; 70. Internal cylinder; 71. Temperature sensor; 72. External pipe; 8. Compression mold. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] like Figure 1 and Figure 2 As shown, a plastic pad extrusion molding and cooling device includes: a frame 1, on which three fixed cylinders 2 are fixedly arranged from top to bottom and whose axes extend from front to back. Rollers 3 are fixedly sleeved on the fixed cylinders 2. A compression mold 8 is arranged on the left side of the area between the two upper rollers 3. After the plastic pad is extruded and molded by the compression mold 8, it passes through the three rollers 3 in an S-shape. An adhesive layer 30 is rotatably sleeved on the outside of the rollers 3.

[0034] like Figure 5 As shown, the front end face of the fixed cylinder 2 is provided with an inlet channel 4 and the rear end face is provided with an outlet channel 5, with the outlet channel 5 located above the inlet channel 4.

[0035] like Figure 4 , Figure 5 and Figure 7 As shown, two partition plates 6 are fixedly sleeved on the fixed cylinder 2, which divide the inner cavity of the roller 3 into three cooling chambers 31 distributed front and back. The inlet channel 4 and the outlet channel 5 are both connected to the cooling chambers 31.

[0036] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a spiral sleeve 32 is fixedly installed in each of the cooling chambers 31. A spiral guide groove 33 is opened on the outer arc surface of the spiral sleeve 32. A transition cavity 34 located in the corresponding cooling chamber 31 is formed between the spiral sleeve 32 and the corresponding fixed cylinder 2.

[0037] like Figure 5 and Figure 7 As shown, the two lower rollers 3 are equipped with detection components 7 for detecting the temperature of the corresponding cooling chamber 31 and making appropriate adjustments.

[0038] Water is pumped simultaneously into the three cooling chambers 31 through the inlet channel 4, and each cooling chamber 31 pumps water into the guide channel 33, ultimately forming a cooling operation with overall zoned water supply and uniform cooling by spiral guided water flow in each cooling chamber 31.

[0039] It should be noted that both the inlet channel 4 and the outlet channel 5 are connected to an external water pump (not shown in the figure). The external water pump pumps the cooling liquid (including water and other cooling media, which are described in this article as water) into the inlet channel 4 and finally out of the outlet channel 5. The cooling operation is carried out by the circulation of water inside the roller 3.

[0040] During operation, when the plastic pad enters between the three rollers 3 in an S-shape, the bonding layer 30 rotates. The bonding layer 30 is made of a high thermal conductivity material, such as chilled cast iron and alloy steel. At the same time, water enters the inlet channel 4 and simultaneously enters each cooling chamber 31. This method reduces the delay in the water pumping process and avoids the problem of uneven cooling effect caused by the water temperature being lower at the front and higher at the back. The water accumulates from bottom to top in the cooling chamber 31 and eventually enters the spiral sleeve 32. The flow direction of the water is guided by the guide groove 33 in the spiral sleeve 32, forcing the cooling water to form turbulence. Compared with the gentle laminar heat exchange, this improves the cooling efficiency. At the same time, the above method allows for uniform cooling in each cooling chamber 31.

[0041] Secondly, during the operation, the water temperature in each cooling chamber 31 is detected by the detection component 7, and auxiliary cooling is performed adaptively according to the different water temperatures. In this way, it is ensured that the roller 3 can perform uniform cooling of the plastic pad.

[0042] like Figure 2 and Figure 3 As shown, a toothed ring 35 is fixedly provided on the front end face of the bonding layer 30, and a gear 350 that meshes with the toothed ring 35 is rotatably provided on the front end face of the roller 3 via a rotating shaft. The rotating shaft is connected to an external motor (not shown in the figure).

[0043] During operation, an external motor drives the rotating shaft to rotate synchronously. The rotating shaft drives the gear 350 on it to mesh with the gear ring 35, thereby causing the bonding layer 30 to rotate and contact the plastic pad for heat exchange and cooling. It should be noted that, compared with the cooling method of the entire roller 3 rotating in the prior art, in this solution only the outer bonding layer 30 rotates, while the inner roller 3 and the water flow are circumferentially stationary. Therefore, it is convenient for the water flow to carry out heat exchange, while reducing the energy consumption required for the overall rotation. In addition, it is convenient for manual operation of the detection component 7 for inspection or subsequent replacement and maintenance without stopping the machine, simplifying the device and improving convenience.

[0044] like Figure 5 and Figure 6 As shown, the infeed channel 4 extends from the front side of the fixed cylinder 2 to the rear side of the roller 3, and the outfeed channel 5 extends from the front partition plate 6 to the rear end face of the fixed cylinder 2.

[0045] The lower side of the fixed cylinder 2 has multiple liquid outlets 36 that run from front to back and are connected to the inlet channel 4.

[0046] like Figure 5 and Figure 6 As shown, a pressure-compensated water outlet 360 is provided at the liquid outlet 36 to control the water outflow process in each cooling chamber 31.

[0047] like Figure 5 and Figure 6 As shown, the guide groove 33 and the inner wall of the roller 3 together form a spiral cavity 37, and the top of the spiral sleeve 32 is provided with multiple flow ports 370 connecting the spiral cavity 37 and the transition cavity 34.

[0048] The spiral sleeve 32 and the fixed sleeve 2 are jointly fixedly provided with a flow cylinder 38 located in the corresponding transition cavity 34. The flow cylinder 38 connects the spiral cavity 37 and the outgoing channel 5.

[0049] During operation, an external water pump pumps water into the inlet channel 4. The pressure of each outlet 36 is controlled to be the same by the pressure-compensated water outlet 360. Therefore, when the inlet channel is full of water and the pressure at each outlet 36 is the same, water will flow through the corresponding outlet 36. This ensures that the water flows into each cooling chamber 31 simultaneously through the small internal cavity (inlet channel 4). Compared with the existing method of pumping water into the entire chamber from front to back, this method ensures that water of the same temperature can be pumped into each cooling chamber 31 at the same time. This avoids the water from undergoing heat exchange in advance during the pumping process, which causes the water temperature to gradually increase from front to back, resulting in different temperatures on the roller 3 from front to back. This ultimately affects the cooling capacity of the roller 3 surface and causes uneven cooling, which affects the molding quality of the plastic pad.

[0050] As water flows through the outlet 36 into the transition cavity 34 and accumulates from bottom to top, eventually filling the entire transition cavity 34, the water then flows through the flow port 370 into the corresponding spiral cavity 37. The inner wall of the guide groove guides the water flow, thereby forming a spiral-shaped stable turbulent flow on the inner wall of the roller 3. Compared with the existing technology of directly pumping water from front to back, the stable turbulent flow method improves the heat exchange efficiency compared with the gentle laminar flow method, thereby achieving uniform and efficient cooling of the roller 3 (plastic pad). It should be added that the water flow layer impacting the inner wall of the roller 3 under turbulent conditions quickly carries away and mixes the heated water flow on the inner wall, thereby improving the heat exchange efficiency.

[0051] Finally, the water flows from front to back in the spiral cavity 37 and enters the outlet channel 5 through the corresponding flow cylinder 38, and finally flows out of the roller 3 through the outlet channel 5. In this way, heat exchange and cooling are continuously carried out between the roller 3, the bonding layer 30 and the plastic pad.

[0052] like Figure 6 As shown, in order to avoid the influence of the thickness of the partition plate 6 on the uniform cooling process, an annular cavity 60 is provided in the area where the partition plate 6 contacts the inside of the roller 3. Two vertical cavities 61 are provided in the partition plate 6, which are symmetrically arranged. The lower vertical cavity 61 is connected to the inlet channel 4 and the upper vertical cavity 61 is connected to the outlet channel 5.

[0053] During operation, water flows into each cooling chamber 31 through the inlet channel 4, and simultaneously enters the corresponding annular chamber 60 through the lower vertical chamber 61. Finally, it returns to the outlet channel 5 through the upper vertical chamber 61. This ensures that the contact area between the partition plate 6 and the roller 3 still has a heat exchange cooling effect, ensuring that the roller 3 can uniformly cool the plastic pad. It should be noted that, due to the limited thickness of the partition plate 6, it does not require the same spiral flow guiding process as the transition chamber 34.

[0054] like Figure 5 and Figure 7 As shown, the detection component 7 includes an inner cylinder 70. The inner cylinder 70, with its axis extending forward and backward, is fixedly installed on the two lower rollers 3. The portion of the inner cylinder 70 located in the cooling chamber 31 is fixedly equipped with multiple temperature sensors 71 that are equidistantly distributed forward and backward. It should be noted that the wire harness in the temperature sensor 71 passes through the inner cylinder 70 and is connected to an external display system (not shown in the figure).

[0055] like Figure 7 As shown, the front and rear sides of the built-in cylinder 70 are open, and the front and rear sides of the built-in cylinder 70 are connected to the flange of the external pipe 72.

[0056] like Figure 3 and Figure 7As shown, in order to avoid the position of the inner tube 70 affecting the cooling effect on the plastic pad, the middle inner tube 70 is located on the left side of the adjacent fixed tube 2, and the lower inner tube 70 is located on the right side of the adjacent fixed tube 2.

[0057] First, it should be noted that the cooling temperature inside the three rollers 3 decreases sequentially from top to bottom, which is suitable for the gradual cooling operation required after the plastic pad comes out of the compression mold 8. Second, the temperature inside the corresponding cooling chamber 31 is detected in real time by the temperature sensor 71 set on the built-in cylinder 70. The temperature sensor 71 converts the temperature sensed as a physical signal into an electrical signal, and then converts the electrical signal into a digital signal. Finally, it is transmitted to the external display system to obtain the real-time temperature inside the cooling chamber 31.

[0058] Before operation, the workers connect the front and rear sides of the built-in cylinder 70 to the flanges of the external pipe 72, which is connected to an external water pump. Therefore, when the temperature sensor 71 shows that the real-time temperature inside the cooling chamber 31 exceeds the required cooling temperature, cooling water is pumped in through the external water pump to reduce the required cooling temperature by adding cooling externally. This can be adjusted manually according to the actual situation. The operation is convenient. The cooling temperature can be adjusted in real time through the above method. Secondly, it should be noted that since the plastic pad is S-shaped from top to bottom, the upper roller 3 has the least contact area with the plastic pad, the middle roller 3 only has the left half of its area used to cool the plastic pad, and the lower roller 3 only has the right half of its area used to cool the plastic pad. Therefore, the built-in cylinder 70 is set in the corresponding position according to the different cooling areas. Heat exchange occurs at a position far away from the cooling area to neutralize the cooling temperature and avoid the problem of uneven cooling of the plastic pad caused by excessive temperature reduction in the cooling area when the built-in cylinder 70 assists in cooling. In summary, external cooling improves the cooling uniformity and cooling effect of the plastic pad.

[0059] It should be further explained that in the existing technology, the roller 3 is directly used as a conduit to receive the cooling water flow, and the plastic pad is cooled directly by rotation. In this method, the cooling temperature of the roller 3 gradually increases with the direction of water flow, resulting in uneven cooling of the plastic pad and causing problems such as warping, deformation, dents, shrinkage cavities, and dimensional instability. In this technical solution, the roller 3 is fixedly installed, and a partition plate 6, an inlet channel 4, an outlet channel 5, a spiral sleeve 32, and a detection component 7 are added to divide the interior of the roller 3 into multiple separately supplied cooling chambers 31, and each cooling chamber 31 is simultaneously cooled. Water supply reduces the delay caused by water flow. The spiral sleeve 32 forces the cooling water to form turbulence, which improves the cooling efficiency compared to the gentle laminar heat exchange. The detection component 7 detects the cooling temperature in real time and provides external supplementary cooling as needed. In summary, a comprehensive cooling method is formed by supplying water to multiple chambers simultaneously for turbulent cooling and supplementing external cooling. Although the above-mentioned components are added, they are all existing conventional mechanical components. Compared with the economic benefits, the cost of adding components is negligible. Therefore, this technical solution is a specific improvement based on the defects of the existing technology and to solve the defects of the technology.

[0060] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0061] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A cooling device for extruding and molding plastic pads, characterized in that, include: The support frame has three fixed cylinders that are distributed from top to bottom and whose axes extend from front to back. Rollers are fixedly sleeved on the fixed cylinders. The compression mold is located on the left side of the area between the two upper rollers. An adhesive layer is rotatably sleeved on the outside of the rollers. The front end face of the fixed cylinder has an inlet channel and the rear end face has an outlet channel, with the outlet channel located above the inlet channel; Two partition plates are fixedly sleeved on the fixed cylinder, which divide the inner cavity of the roller into three cooling chambers distributed in front and behind. The inlet channel and the outlet channel are both connected to the cooling chambers. Each of the cooling chambers is fixedly provided with a spiral sleeve, and the outer arc surface of the spiral sleeve is provided with a spiral-shaped guide groove. A transition cavity is formed between the spiral sleeve and the corresponding fixed cylinder within the corresponding cooling chamber. The two lower rollers are equipped with detection components, which include an internal cylinder for adding an external cooling source to adjust the temperature and a temperature sensor. During cooling, the inlet channel pumps water into the three cooling chambers simultaneously, while each cooling chamber pumps water into its own guide channel. At the same time, the detection component detects and adjusts the cooling temperature in real time, ultimately forming a cooling operation with overall zoned water supply and spiral-guided water flow for uniform cooling in each cooling chamber. The guide groove and the inner wall of the roller together form a spiral cavity, and the top of the spiral sleeve has multiple flow ports connecting the spiral cavity and the transition cavity. A flow tube located in the corresponding transition cavity is fixedly provided between the spiral sleeve and the fixed sleeve, and the flow tube connects the spiral cavity and the outgoing channel. The infeed channel extends from the front side of the fixed cylinder to the rear side of the roller, and the outfeed channel extends from the front partition plate to the rear end face of the fixed cylinder. The lower side of the fixed cylinder has multiple liquid outlets that run from front to back and are connected to the inlet channel; A pressure-compensated water outlet is provided at the liquid outlet to control the water outflow process in each cooling chamber.

2. The plastic pad extrusion molding cooling device according to claim 1, characterized in that: A toothed ring is fixedly provided on the front end face of the bonding layer, and a gear that meshes with the toothed ring is rotatably provided on the front end face of the roller via a rotating shaft.

3. The plastic pad extrusion molding cooling device according to claim 1, characterized in that: The area where the partition plate contacts the inside of the roller is provided with an annular cavity. The partition plate has two vertical cavities that are symmetrically arranged, with the lower vertical cavity connected to the inlet channel and the upper vertical cavity connected to the outlet channel.

4. The plastic pad extrusion molding cooling device according to claim 1, characterized in that: The two lower rollers are fixedly connected with an inner cylinder extending from front to back along its axis. The portion of the inner cylinder located inside the cooling chamber is fixedly equipped with multiple temperature sensors that are equidistantly distributed from front to back.

5. The plastic pad extrusion molding cooling device according to claim 4, characterized in that: The front and rear sides of the inner cylinder are open, and the front and rear sides of the inner cylinder are connected to the external pipe flange.

6. The plastic pad extrusion molding cooling device according to claim 4, characterized in that: The middle inner tube is located to the left of the adjacent fixed tube, and the lower inner tube is located to the right of the adjacent fixed tube.

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