Plastic pad extrusion molding cooling device

Abstract

The invention relates to the technical field of plastic molding, in particular to a plastic pad extrusion molding cooling device which comprises a vertical frame, a fixed cylinder, a roller, a spiral sleeve and a detection assembly. The roller is divided into a plurality of cooling cavities for independently supplying water, water is supplied to the cooling cavities at the same time, the problem of uneven cooling caused by water flowing is solved, the spiral sleeve forcibly cools water to form turbulent flow, and compared with smooth laminar heat exchange, the cooling efficiency is improved, and the service life of the roller is prolonged. Then, the cooling temperature is detected in real time by means of the detection assembly, external supplementary cooling is conducted according to the situation, and therefore the mode that water is independently supplied to the multiple cooling cavities for turbulent cooling and matched with external supplementary cooling is formed, and the uniform cooling degree of the plastic pad is comprehensively improved; and the quality problems of buckling deformation, sinking, shrinkage and the like of the plastic pad caused by non-uniform cooling are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic forming, in particular to a plastic mat extrusion forming cooling device. BACKGROUND

[0002] The plastic mat usually adopts the process flow of extrusion, calendering, cooling and cutting, and the main process is to extrude the plastic particles after hot melting by the extruder and form the initial plastic mat of the mat plate shape through the mold, and then because the temperature of the sheet blank just coming out of the mold is very high, it is in a plastic state, and the surface is very rough.

[0003] At present, the three-roll calender is usually used to calender and shape the sheet blank and cool it, and the sheet blank passes through the gap between the three precisely machined rollers, and the final thickness of the plastic mat is precisely controlled, wherein the three rollers distributed from top to bottom in the three-roll calender are hollow, and the plastic mat is cooled by pouring the cooling medium (usually water) into the roller along the axis, and after passing through the three-roll calender, the sheet blank passes through a long cooling conveying section for thorough and uniform cooling.

[0004] In view of the problems existing in the existing cooling process, because the cooling medium is poured into the roller along the axis, part of the water has begun to gradually cool during the flow process, so the cooling water flow contacted by the rear part of the plastic mat has been cooled by heat transfer of the front part of the plastic mat, and the cooling effect of each roller on the plastic mat is uneven, and uneven cooling easily leads to quality problems such as warping deformation and concave shrinkage of the plastic mat. SUMMARY

[0005] Therefore, it is necessary to provide a plastic mat extrusion forming cooling device to solve the above problems of the prior art.

[0006] The present application provides a plastic mat extrusion forming cooling device, which comprises: a stand, three fixed cylinders distributed from top to bottom and having axis extending from front to back are fixedly arranged on the stand, a roller is fixedly sleeved on the fixed cylinder, a plastic molding die is arranged on the left side of the region between the two upper rollers, and a bonding layer is rotatably sleeved on the outer side of the roller.

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

[0008] Two partition plates distributed left and right are fixedly sleeved on the fixed cylinder, and the inner cavity of the roller is divided into three cooling cavities distributed front and back by the partition plates, and the inlet channel and the outlet channel are communicated with the cooling cavities.

[0009] A spiral sleeve is fixedly arranged in each cooling cavity, a spiral-shaped flow guide groove is formed on the outer arc surface of the spiral sleeve, and a transition cavity located in the corresponding cooling cavity is formed between the spiral sleeve and the corresponding fixed cylinder.

[0010] The lower two rollers are provided with detection assemblies for detecting and adjusting the temperature of the corresponding cooling cavities.

[0011] During cooling, the inlet channel simultaneously pumps water into the three cooling cavities, and each cooling cavity independently pumps water into the guide groove, while the detection assemblies detect and adjust the cooling temperature in real time, so as to finally form a cooling operation of overall partitioned water supply and uniform spiral guide water flow in each cooling cavity.

[0012] According to an advantageous embodiment, the front end surface of the fitting layer is fixedly provided with a gear ring, and the front end surface of the roller is rotatably provided with a gear meshing with the gear ring through a rotating shaft.

[0013] According to an advantageous embodiment, the inlet channel is from the front side of the fixed cylinder to the rear side of the roller, and the outlet channel is from the front partition plate to the rear end surface of the fixed cylinder.

[0014] The lower side of the fixed cylinder is provided with a plurality of liquid outlets from front to rear and in communication with the inlet channel.

[0015] According to an advantageous embodiment, the liquid outlet is provided with a pressure compensation water outlet for controlling the water outlet process in each cooling cavity.

[0016] According to an advantageous embodiment, the spiral sleeve and the inner wall of the roller together form a spiral cavity between the guide groove of the spiral sleeve and the inner wall of the roller, and the top of the spiral sleeve is provided with a plurality of flow-through openings connecting the spiral cavity and the transition cavity.

[0017] The spiral sleeve and the fixed cylinder are fixedly provided with a flow-through cylinder located in the corresponding transition cavity, and the flow-through cylinder communicates the spiral cavity and the outlet channel.

[0018] According to an advantageous embodiment, the area where the partition plate contacts the inside of the roller is provided with an annular cavity, and the partition plate is provided with two vertically symmetrical vertical cavities, wherein the lower vertical cavity is in communication with the inlet channel, and the upper vertical cavity is in communication with the outlet channel.

[0019] According to an advantageous embodiment, the detection assembly comprises an embedded cylinder, and the embedded cylinder is fixedly and penetratively arranged on the lower two rollers and extends along the axis from front to back, and the part of the embedded cylinder located in the cooling cavity is fixedly provided with a plurality of temperature sensors equally distributed from front to back.

[0020] According to an advantageous embodiment, the front and back sides of the embedded cylinder are open, and the front and back sides of the embedded cylinder are connected with the flanges of the external pipeline.

[0021] According to an advantageous embodiment, the embedded cylinder in the middle is located on the left side of the adjacent fixed cylinder, and the embedded cylinder on the lower side is located on the right side of the adjacent fixed cylinder.

[0022] In summary, the present application includes the following advantages: in the present application, the roller is divided into multiple cooling cavities supplied with water separately, and the cooling cavities are supplied with water simultaneously, which reduces 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 with the smooth laminar heat exchange; and then the detection assembly detects the cooling temperature in real time and performs external supplementary cooling according to the situation, so as to form a way of multiple cooling cavities supplied with water separately, turbulent cooling, and external supplementary cooling, which comprehensively improves the uniform cooling degree of the plastic pad and avoids the quality problems such as warping deformation and concave shrinkage of the plastic pad caused by uneven cooling. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only belong to the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0024] Figure 1 A perspective structural schematic view of a plastic pad extrusion molding cooling device provided by an embodiment of the present application is shown.

[0025] Figure 2 A front view of the relationship among the roller, the fixed cylinder and the adhesion layer provided by an embodiment of the present application is shown.

[0026] Figure 3 A perspective structural schematic view of the relationship among the roller, the fixed cylinder and the adhesion layer provided by an embodiment of the present application is shown.

[0027] Figure 4 A partial cross-sectional left view of the relationship among the lowermost roller, the spiral sleeve and the partition plate provided by an embodiment of the present application is shown.

[0028] Figure 5 A partial cross-sectional left view of the relationship among the lowermost roller, the fixed cylinder and the partition plate provided by an embodiment of the present application is shown.

[0029] Figure 6 A partial cross-sectional perspective schematic view of the relationship among the spiral sleeve, the fixed cylinder and the partition plate provided by an embodiment of the present application is shown.

[0030] Figure 7 A partial exploded cross-sectional perspective structural schematic view of the relationship among the roller, the built-in cylinder and the partition plate provided by an embodiment of the present application is shown.

[0031] Wherein, the above-mentioned drawings include the following reference signs: 1, stand; 2, fixed cylinder; 3, roller cylinder; 30, adhesion layer; 31, cooling cavity; 32, spiral sleeve; 33, flow guide groove; 34, transition cavity; 35, gear ring; 350, gear; 36, liquid outlet; 360, pressure compensation water outlet; 37, spiral cavity; 370, flow-through opening; 38, flow-through cylinder; 4, inlet passage; 5, outlet passage; 6, partition plate; 60, ring cavity; 61, vertical cavity; 7, detection assembly; 70, built-in cylinder; 71, temperature sensor; 72, external pipeline; 8, compression molding mold. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0033] As shown in Figure 1 and Figure 2 , a plastic pad extrusion molding cooling device comprises a stand 1, three fixed cylinders 2 are fixedly arranged on the stand 1 and distributed from top to bottom and the axis extends from front to back, a roller cylinder 3 is fixedly sleeved on the fixed cylinder 2, a compression molding mold 8 is arranged on the left side of the region between the upper two roller cylinders 3, and the plastic pad passes through the three roller cylinders 3 in an S-shaped state in sequence after being extruded by the compression molding mold 8, and an adhesion layer 30 is rotatably sleeved on the outside of the roller cylinder 3.

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

[0035] As shown in Figure 4 , Figure 5 and Figure 7 , two partition plates 6 are fixedly sleeved on the fixed cylinder 2 and are distributed left and right, the inner cavity of the roller cylinder 3 is divided into three cooling cavities 31 which are distributed front and back by the partition plate 6, and the inlet passage 4 and the outlet passage 5 are both in communication with the cooling cavities 31.

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

[0037] As shown in Figure 5 and Figure 7 As shown in the drawings, the lower two rollers 3 are provided with detection components 7 for detecting the temperature of the corresponding cooling cavities 31 and adjusting accordingly.

[0038] The three cooling cavities 31 are simultaneously pumped by the inlet channel 4, and each cooling cavity 31 is pumped into the guide groove 33, finally forming a whole partitioned water supply and a spiral guide water flow in each cooling cavity 31 for uniform cooling.

[0039] It should be noted that the inlet channel 4 and the outlet channel 5 are connected to an external water pump (not shown in the figure), which pumps the cooling liquid (including water and other cooling media, and water is used as the cooling medium in this article) into the inlet channel 4, and finally flows out from the outlet channel 5, through the circulation of water in the roller 3 for cooling.

[0040] When the plastic pad enters the three rollers 3 in an S-shaped state, the bonding layer 30 rotates, and the bonding layer 30 is made of high-temperature-conducting materials such as chilled cast iron and alloy steel. At the same time, water enters the inlet channel 4 and each cooling cavity 31, reducing the delay in the pumping process and avoiding the problem of uneven overall cooling effect caused by low water temperature on the front side and high water temperature on the back side. The water accumulates from bottom to top in the cooling cavity 31 and finally enters the spiral sleeve 32, and the guide groove 33 in the spiral sleeve 32 guides the flow direction of the water, forcing the cooling water to form a turbulent flow, which improves the cooling efficiency compared to a smooth laminar flow heat exchange. At the same time, each cooling cavity 31 is uniformly cooled by the above method.

[0041] Secondly, during the operation, the detection component 7 detects the water temperature in each cooling cavity 31, and performs auxiliary cooling and other operations according to the different water temperatures, which ensures that the roller 3 can uniformly cool the plastic pad.

[0042] As shown in Figure 2 and Figure 3 As shown in the drawings, the front end of the bonding layer 30 is fixedly provided with a tooth ring 35, and the front end of the roller 3 is rotatably provided with a gear 350 engaged with the tooth ring 35 through a rotating shaft, and the rotating shaft is connected to an external motor (not shown in the figure).

[0043] In operation, the external motor drives the rotating shaft to rotate synchronously, and the rotating shaft drives the gear 350 on it to mesh with the gear ring 35 to rotate, so that the adhesion layer 30 rotates and contacts the plastic pad to exchange heat and cool. It needs to be pointed out that, compared with the cooling method of the prior art in which the roller 3 rotates as a whole, only the external adhesion layer 30 rotates in the present scheme, while the internal roller 3 and the water flow are circumferentially stationary, so that the water flow can exchange heat, and the energy consumption required for overall rotation is reduced. Secondly, it is convenient for subsequent manual operation of the detection assembly 7 to detect or replace and maintain the device under non-stop operation, simplifying the device and improving convenience.

[0044] As shown in Figure 5 and Figure 6 , the inlet channel 4 is from the front side of the fixed cylinder 2 to the rear side of the roller 3, and the outlet channel 5 is from the front side of the partition plate 6 to the rear end face of the fixed cylinder 2.

[0045] A plurality of liquid outlets 36 are provided on the lower side of the fixed cylinder 2, which are in communication with the inlet channel 4 from front to rear.

[0046] As shown in Figure 5 and Figure 6 , the liquid outlet 36 is provided with a pressure compensation water outlet 360 for controlling the water outlet process in each cooling cavity 31.

[0047] As shown in Figure 5 and Figure 6 , the flow 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 a plurality of flow-through openings 370 connecting the spiral cavity 37 and the transition cavity 34.

[0048] The spiral sleeve 32 and the fixed cylinder 2 are jointly provided with a flow-through cylinder 38 located in the corresponding transition cavity 34, which is in communication with the spiral cavity 37 and the outlet channel 5.

[0049] In operation, the external water pump pumps water into the inlet channel 4, and the pressure compensation water outlet 360 controls the pressure of each liquid outlet 36 to be the same, so that when the inlet channel is filled with water and the pressure of each liquid outlet 36 is the same, the water flow will flow through the liquid outlet 36, thereby ensuring that the water flow is simultaneously divided into each cooling cavity 31 in a small space (inlet channel 4). Compared with the prior art in which water flow is pumped from front to back in the entire cavity, the present scheme ensures that the same temperature water flow can be pumped into each cooling cavity 31 at the same time, avoiding the problem that the water flow is exchanged too early during the water flow pumping process, causing the temperature of the water flow to gradually increase from front to back, resulting in different temperatures of the roller 3 from front to back, ultimately affecting the cooling capacity of the surface of the roller 3, and causing uneven cooling and affecting the quality of the plastic pad.

[0050] With the water flow entering the transition cavity 34 through the outlet 36 and accumulating from bottom to top, eventually filling the entire transition cavity 34, and then the water flow entering the corresponding spiral cavity 37 through the flow passage 370, the inner wall of the guide groove guides the water flow, forming a spiral stable turbulent flow in the inner wall of the roller 3. Compared with the prior art of directly pumping water flow from front to back, the stable turbulent flow mode improves the heat exchange efficiency, thereby achieving uniform and efficient cooling of the roller 3 (plastic pad). It should be noted that the water flow layer impinges on the inner wall of the roller 3 under turbulent flow, thereby quickly removing the heated water flow at the inner wall for mixing, thereby improving the heat exchange efficiency.

[0051] Finally, the water flow flows from front to back in the spiral cavity 37 and enters the outlet passage 5 through the corresponding flow passage 38 to collect, and finally flows out of the roller 3 through the outlet passage 5. Through the above-mentioned mode, heat exchange cooling is continuously carried out between the roller 3, the adhesion layer 30 and the plastic pad.

[0052] As shown in Figure 6 , in order to avoid the influence of the thickness of the partition plate 6 on the uniform cooling process, the area where the partition plate 6 contacts the inside of the roller 3 is provided with an annular cavity 60, and two vertically symmetrical vertical cavities 61 are formed in the partition plate 6. The lower vertical cavity 61 is in communication with the inlet passage 4, and the upper vertical cavity 61 is in communication with the outlet passage 5.

[0053] When working, the water flow enters each cooling cavity 31 through the inlet passage 4, and at the same time, the water flow enters the corresponding annular cavity 60 through the lower vertical cavity 61, and finally returns to the outlet passage 5 through the upper vertical cavity 61, so that the contact area between the partition plate 6 and the roller 3 still has 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, the same spiral flow guiding process in the transition cavity 34 is not required.

[0054] As shown in Figure 5 and Figure 7 , the detection assembly 7 comprises an inner cylinder 70, and the inner cylinder 70 is fixedly arranged on the lower two rollers 3 and extends along the axis. The portion of the inner cylinder 70 located in the cooling cavity 31 is fixedly provided with a plurality of temperature sensors 71 which are equidistantly distributed front and back. It should be noted that the wire harness of the temperature sensor 71 is connected with an external display system (not shown in the figure) after penetrating the inner cylinder 70.

[0055] As shown in Figure 7 , the front and back sides of the inner cylinder 70 are open, and the front and back sides of the inner cylinder 70 are flange-connected with an external pipeline 72.

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

[0057] First of all, it needs to be pointed out that the cooling temperature in the three rollers 3 decreases from top to bottom, which is suitable for the gradual temperature reduction cooling operation required after the plastic pad comes out of the compression mold 8, secondly, the temperature sensor 71 on the built-in cylinder 70 detects the temperature in the corresponding cooling cavity 31 in real time, and the temperature sensor 71 converts the temperature it senses into a physical signal into an electrical signal, and the electrical signal is converted into a digital signal, and finally transmitted to the external display system, so as to obtain the real-time temperature in the cooling cavity 31.

[0058] The staff connects the front and rear sides of the built-in cylinder 70 with the flanges of the external pipeline 72 before work, and the external pipeline 72 is connected with the external water pump, so when the temperature sensor 71 feedback data shows that the real-time temperature in the cooling cavity 31 exceeds the required cooling temperature, the external water pump is pumped into the cooling water flow, and the external expansion cooling method is used to reduce the required cooling temperature, which can be adjusted according to the actual situation by external manual, the operation steps are convenient, and the cooling temperature is adjusted in real time through the above-mentioned method, secondly, it needs to be pointed out that since the plastic pad is S-shaped from top to bottom, the area of the upper roller 3 contacting the plastic pad is the smallest, the middle roller 3 only has a half area on the left side for cooling the plastic pad, and the lower roller 3 only has a half area on the right side for cooling the plastic pad, therefore, according to the different cooling areas, the built-in cylinder 70 is arranged at the corresponding position, and the heat exchange is carried out at the position away from the cooling area to neutralize the cooling temperature, so as to avoid the problem that the temperature in the cooling area is excessively reduced when the built-in cylinder 70 assists cooling, resulting in uneven cooling of the plastic pad, and the cooling uniformity and cooling effect of the plastic pad are improved by external cooling.

[0059] It needs to be explained that, in the prior art, the roller 3 is directly used as a pipeline for receiving the cooling water flow, and the plastic pad is directly cooled by rotating cooling. In this way, the cooling temperature of the roller 3 gradually increases along the direction of water flow, so that the cooling effect on the plastic pad is uneven, causing problems such as warping deformation, depression and shrinkage of the plastic pad, and unstable size. In the technical solution, the roller 3 is fixedly arranged, and the partition plate 6, the inlet passage 4, the outlet passage 5, the spiral sleeve 32 and the detection assembly 7 are added. The roller 3 is divided into a plurality of cooling cavities 31 supplied with water separately, and each cooling cavity 31 is simultaneously supplied with water, reducing the time delay caused by water flow. The spiral sleeve 32 forces the cooling water to form turbulent flow, which improves the cooling efficiency compared with the smooth laminar heat exchange. The detection assembly 7 detects the cooling temperature in real time and performs external supplementary cooling according to the situation. In summary, the comprehensive cooling method of multi-chamber simultaneous water supply, turbulent cooling and external supplementary cooling is formed. Although the above-mentioned components are added, they are all conventional mechanical components. Compared with the economic benefits, the cost of adding components is negligible. Therefore, the technical solution is a specific improvement based on the defects of the prior art and solving the technical defects.

[0060] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description. Without the opposite description, these orientation words do not indicate and imply that the devices or elements indicated must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0061] In addition, the terms "first", "second", "one", "two" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0062] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited by the protection scope of the present application, so that equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A cooling device for extruding and molding plastic pads, characterized in that, include: The upright 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 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.

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 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.

4. The plastic pad extrusion molding cooling device according to claim 3, characterized in that: A pressure-compensated water outlet is provided at the liquid outlet to control the water outflow process in each cooling chamber.

5. The plastic pad extrusion molding cooling device according to claim 1, characterized in that: 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.

6. 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.

7. 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.

8. A plastic pad extrusion molding cooling device according to claim 7, 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.

9. A plastic pad extrusion molding cooling device according to claim 7, 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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