Physical foaming diffusion plate production system

Abstract

The invention provides a physical foaming diffusion plate production system, and relates to the field of diffusion plate production, the physical foaming diffusion plate production system comprises a control assembly, the control assembly is composed of a pressure mechanism and an adjusting mechanism, and the control assembly can limit the maximum compression roller machining force while achieving integrated compression roller machining operation on a plate, so that the maximum compression roller machining force can be adjusted; when the compression roller pressure is larger than the maximum compression roller pressure during compression roller machining operation, the control assembly can automatically trigger the limiting function and remove the compression roller pressure, plates are prevented from being excessively extruded and damaged, the yield is greatly increased, the maximum compression roller pressure can be freely adjusted and controlled through the adjusting mechanism, and the production efficiency is improved. Therefore, the limiting and protecting device is suitable for limiting and protecting plates of different types when the plates are subjected to compression roller machining operation, and the problems that a compression roller device is not provided with a compression roller pressure limiting structure, the plates can be forcibly extruded to the set thickness in the compression roller process, the plates are damaged due to too large pressure in the compression roller process, and the yield is reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of diffusion plate production, and in particular to a physical foaming diffusion plate production system. Background Art

[0002] The supercritical carbon dioxide optical diffuser technology adopts physical foaming process and three-layer co-extrusion technology, with low-cost, non-toxic carbon dioxide as the foaming agent. By encapsulating supercritical carbon dioxide fluid and nucleating agent in the carrier resin, the optical diffuser forms a uniform honeycomb structure and pore size. The pore size can be controlled in the range of 50-200μm, and the pore diameter error is less than 10%, thereby effectively improving the performance of light source dispersion, refraction and transmission, so that the light source can be uniform after passing through the optical foam diffuser, and the weight of the optical foam diffuser is reduced, and the overall mechanical properties are good. While the product quality is improved, the production cost can be greatly reduced. At the same time, it has positive significance for the comprehensive utilization of carbon, and the product can be better suitable for application in the production of electronic display devices.

[0003] The pressing roller device is a part of the physical foaming diffusion board production system, which is used to cool and shape the foaming diffusion board and convey the board. By adjusting the traction speed of the pressing roller, the gap and temperature of the rollers, the thickness and surface shape of the diffusion board can be adjusted.

[0004] However, as for the pressing roller device in the current physical foaming diffusion plate production system, it does not have a pressing roller pressure limiting structure. During the pressing roller process, the plate will be forcibly squeezed to a set thickness. It is not suitable for pressing roller processing operations on different materials. During the pressing roller process, excessive pressure may cause damage to the plate, affecting the production quality, reducing the yield rate, and having poor practicality. Summary of the invention

[0005] The disclosed embodiment relates to a physical foaming diffusion plate production system, which has a control component. The control component can realize the integrated roller processing operation of the plate and can also limit the maximum roller processing force. When the roller pressure is greater than the maximum roller pressure during the roller processing operation, the control component can automatically trigger the limiting function and remove the roller pressure to avoid excessive extrusion and damage to the plate. The processing is stable and the yield rate is greatly improved. The maximum roller pressure can be freely adjusted and used through the adjustment mechanism, so as to adapt to the limiting and protection use when the roller processing operation is performed on different types of plates. The flexibility, adaptability and practicality are extremely strong.

[0006] In a first aspect, the present disclosure provides a physical foaming diffusion plate production system, which specifically includes: a pressure roller assembly, a driving motor and a lifting push rod, wherein the pressure roller assembly includes a lower roller seat, an upper roller frame, a driving roller and a pressing roller, wherein the upper roller frame is fixedly mounted on the top of the lower roller seat, and the driving roller is rotatably connected to the inside of the lower roller seat, wherein the driving motor is fixedly mounted on the side of the lower roller seat, wherein the driving motor is transmission-connected to the rotating shaft of the driving roller, and the lifting push rod is fixedly mounted on the top of the upper roller frame; the pressure roller assembly also includes a pressure frame, wherein the pressure frame is plugged into the inside of the upper roller frame, and the pressing roller is rotatably connected to the inside of the pressure frame; a control assembly, wherein the control assembly is composed of a pressure mechanism and an adjustment mechanism; The pressure mechanism includes a support rod, a pressure plate, a retaining block and a resisting rod, the top of the support rod is fixedly connected to the bottom end of the push rod of the lifting push rod, and the bottom of the support rod is inserted into the inside of the pressure frame, the pressure plate is inserted into the outside of the support rod, the retaining block is radially inserted into the inside of the pressure plate, and the resisting rod is axially inserted into the inside of the pressure plate; The adjustment mechanism comprises a positioning plate and a positioning rod. The positioning plate is plugged into the outside of the support rod, and the positioning rod is rotatably connected to the top of the pressure frame.

[0007] In at least some embodiments, a pressure spring is sleeved on the outside of the support rod, and two ends of the pressure spring are respectively against the bottom of the pressure plate and the top of the positioning plate.

[0008] In at least some embodiments, the bottom end of the rod body of the resistance rod resists against the top of the pressure frame, and a resistance top spring is provided on the top of the resistance rod, and the two ends of the resistance top spring resist against the inside of the pressure plate and the top of the resistance rod respectively.

[0009] In at least some embodiments, a linkage rod is provided inside the abutment rod, and an inclined linkage groove is provided inside the retaining block, and the linkage rod is inserted into the linkage groove.

[0010] In at least some embodiments, a retaining tooth block is provided on the side of the retaining block, and a retaining tooth groove is provided on the side of the support rod, and the cross-sectional shapes of the retaining tooth block and the retaining tooth groove are both right-angled triangles. Under the action of the resisting top spring, when the resisting rod is not subjected to external force compression, the retaining tooth block is inserted into the inside of the retaining tooth groove, and when the pressure plate moves upward outside the support rod, the straight edge of the retaining tooth block and the straight edge of the tooth groove of the retaining tooth groove are engaged.

[0011] In at least some embodiments, a retaining ring is provided at the bottom of the support rod, and the outer diameter of the retaining ring is larger than the inner diameter of the support rod, and the retaining ring is located at one end of the support rod passing through the pressure frame.

[0012] In at least some embodiments, a rod body of the positioning rod is provided with threads on the outside, and the positioning rod is screwed to the inside of the positioning plate through the threads of the rod body.

[0013] In at least some embodiments, a track block with a "T"-shaped cross section is provided on the side of the pressure frame, and an upper limit track groove is provided inside the upper roller frame, and the track block is inserted into the upper limit track groove.

[0014] In at least some embodiments, a reset blocking rod is provided on the top of the pressure plate.

[0015] The physical foaming diffusion plate production system provided by the present invention has the following beneficial effects.

[0016] The control component can realize the integrated roller processing operation of the plate, and can also limit the maximum roller processing force. If the roller pressure is greater than the maximum roller pressure during the roller processing operation, the control component can automatically trigger the limiting function and remove the roller pressure to avoid the plate from being damaged by excessive extrusion. The processing is stable and the yield rate is greatly improved. The maximum roller pressure can be freely adjusted and used through the adjustment mechanism, so as to adapt to the limitation and protection of roller processing operations on different types of plates. It is extremely flexible, adaptable and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention in the reset state.

[0021] Figure 3 The present invention Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0022] Figure 4 It is a schematic diagram of the structure of the pressure roller assembly after disassembly.

[0023] Figure 5 It is a schematic diagram of the structure of the disassembled regulating mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure after the pressure mechanism of the present invention is disassembled.

[0025] Figure 7 It is a schematic diagram of the internal structure when the plate is subjected to roller integration in the present invention.

[0026] Figure 8It is a schematic diagram of the internal structure after the limit protection function of the control component is triggered in the present invention.

[0027] Fig. 9 The present invention Figure 8 Schematic diagram of the enlarged structure of part B in the middle.

[0028] Reference numerals list 1. Pressing roller assembly; 101. Lower roller seat; 102. Upper roller frame; 1021. Upper limit track groove; 103. Driving roller; 104. Pressing roller; 105. Pressure frame; 1051. Track block; 2. Pressure mechanism; 201. Support rod; 2011. Pressure top spring; 2012. Retaining tooth groove; 2013. Retaining retaining ring; 202. Pressure plate; 2021. Reset blocking rod; 203. Retaining block; 2031. Linkage groove; 2032. Retaining tooth block; 204. Rejection rod; 2041. Rejection top spring; 2042. Linkage rod; 3. Adjustment mechanism; 301. Positioning plate; 302. Positioning rod; 4. Drive motor; 5. Lifting push rod. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Please refer to Figures 1 to 9 As shown: Embodiment 1: The present invention provides a physical foaming diffusion plate production system, including a pressure roller assembly 1, a driving motor 4 and a lifting push rod 5, the pressure roller assembly 1 includes a lower roller seat 101, an upper roller frame 102, a driving roller 103 and a pressing roller 104, the upper roller frame 102 is fixedly installed on the top of the lower roller seat 101, and the driving roller 103 is rotatably connected to the inside of the lower roller seat 101, the driving motor 4 is fixedly installed on the side of the lower roller seat 101, the driving motor 4 is connected to the rotating shaft of the driving roller 103, and the lifting push rod 5 is fixedly installed on the top of the upper roller frame 102; the pressure roller assembly 1 also includes a pressure frame 105, the pressure frame 105 is plugged into the inside of the upper roller frame 102, and the pressing roller 104 is rotatably connected to the inside of the pressure frame 105; a control component, the control component is composed of a pressure mechanism 2 and an adjustment mechanism 3; The pressure mechanism 2 includes a support rod 201, a pressure plate 202, a retaining block 203 and a resisting rod 204. The top of the support rod 201 is fixedly connected to the bottom end of the push rod of the lifting push rod 5, and the bottom of the support rod 201 is inserted into the inside of the pressure frame 105, the pressure plate 202 is inserted into the outside of the support rod 201, the retaining block 203 is radially inserted into the inside of the pressure plate 202, and the resisting rod 204 is axially inserted into the inside of the pressure plate 202; The adjustment mechanism 3 includes a positioning plate 301 and a positioning rod 302 . The positioning plate 301 is plugged into the outside of the support rod 201 , and the positioning rod 302 is rotatably connected to the top of the pressure frame 105 .

[0031] In the embodiment of the present disclosure, a retaining ring 2013 is provided at the bottom of the support rod 201, and the outer diameter of the retaining ring 2013 is larger than the inner diameter of the support rod 201, and the retaining ring 2013 is located at one end of the support rod 201 that passes through the pressure frame 105. In use, the pressure roller assembly 1 can realize the plate integration pressure roller processing operation. In the reset state (the track block 1051 is at the top of the upper limit track groove 1021), the reset blocking rod 2021 abuts against the bottom of the upper roller frame 102, so that the positions of various components of the control assembly in the reset state are positioned under the action of the upper limit track groove 1021 and the reset blocking rod 2021. Under the clamping action of the straight edges of the tooth grooves of the retaining tooth block 2032 and the retaining tooth grooves 2012, the pressure plate 202 cannot move upward on the support rod 201 at this time, and the outer sleeve of the support rod 201 is provided with a pressure top spring 2011, and the pressure top spring The two ends of 2011 are respectively against the bottom of the pressure plate 202 and the top of the positioning plate 301, so that the two ends of the pressure spring 2011 can contact between the pressure plate 202 and the positioning plate 301 to stretch the pressure plate 202 and the pressure frame 105. Because the pressure frame 105 will not fall out of the bottom of the support rod 201 under the action of the retaining ring 2013, the distance between the pressure plate 202 and the positioning plate 301 is fixed at this time. The pressure frame 105, the support rod 201 and the pressure plate 202 form a whole for use. The whole can be driven by the extension and retraction of the lifting push rod 5 to move up and down to change the distance between the lamination roller 104 and the driving roller 103, that is, the thickness of the plate pressed by the rolling process. After that, the driving motor 4 drives the driving roller 103 to rotate, and the plate can be inserted between the lamination roller 104 and the driving roller 103 for the rolling process. It is convenient and stable to use.

[0032] In the embodiment of the present disclosure, the bottom end of the rod body of the resistance rod 204 is in contact with the top of the pressure frame 105, and the top of the resistance rod 204 is provided with a resistance top spring 2041, and the two ends of the resistance top spring 2041 are respectively in contact with the inside of the pressure plate 202 and the top of the resistance rod 204, and the side of the retaining block 203 is provided with a retaining tooth block 2032, and the side of the support rod 201 is provided with a retaining tooth groove 2012, and the tooth cross-section shape of the retaining tooth block 2032 and the retaining tooth groove 2012 are both right-angled triangles. Under the action of the resistance top spring 2041, when the resistance rod 204 is not squeezed by external force, the retaining tooth block 2032 is inserted into the inside of the retaining tooth groove 2012, and when the pressure plate 202 is on the support rod 20 1 moves upward, the straight edge of the tooth of the tooth block 2032 is kept engaged with the straight edge of the tooth groove 2012. During use, the control component can limit and control the maximum roller pressure. During the roller pressing process, when the roller resistance (i.e., the resistance of the sheet during the roller pressing integration process) is less than the roller pressure (the force of the pressure top spring 2011 to open the pressure plate 202 and the pressure frame 105), the roller resistance cannot cause the pressure top spring 2011 to deform. Therefore, when in a normal processing state, the pressure frame 105, the support rod 201 and the pressure plate 202 can be stably maintained as a whole for use, and the sheet can be stably subjected to roller pressing integration processing operations, which is convenient and stable to use.

[0033] In the disclosed embodiment, a linkage rod 2042 is provided inside the resistance rod 204, and an inclined linkage groove 2031 is provided inside the retaining block 203, and the linkage rod 2042 is inserted into the linkage groove 2031. In use, the control component realizes the limit protection function by changing the distance between the pressure plate 202 and the pressure frame 105. When the pressure roller resistance is greater than the pressure roller pressure, the increase in the pressure roller resistance will cause the pressure frame 105 to move upward along the support rod 201 and compress the pressure top spring 2011. Since the resistance rod 204 is in contact with the pressure frame 105, when the pressure frame 105 moves, it can drive the resistance rod 204 to move upward synchronously and compress the resistance top spring 2041. When the resistance rod 204 moves upward, the linkage rod 2042 can drive the retaining tooth block 2032 to move toward one side through the linkage groove 2031. The side movement releases the clamping relationship between the retaining tooth block 2032 and the straight edge of the tooth groove 2012, thereby releasing the positioning relationship of the pressure plate 202 on the support rod 201. Thereafter, the pressure plate 202 will move upward on the support rod 201 under the action of the pressure top spring 2011. During the upward movement of the pressure plate 202, the pressure top spring 2011 is unloaded to reduce the pressure of the pressure roller, and under the action of the resistance top spring 2041, the resistance rod 204 will move downward inside the pressure plate 202 to reset the retaining block 203 and restore the clamping relationship between the retaining tooth block 2032 and the straight edge of the tooth groove 2012. That is, the retaining tooth block 2032 will be clamped into the subsequent retaining tooth groove 2012 to realize the positioning function again, avoiding the phenomenon of excessive upward movement and flying of the pressure frame 105, and ensuring stable use.

[0034] In the embodiment of the present disclosure, the outside of the rod body of the positioning rod 302 is provided with a thread, and the positioning rod 302 is screwed to the inside of the positioning plate 301 through the rod body thread. In use, when the control component triggers the limit protection function, the pressure frame 105 and the control component are lifted to the maximum height by the lifting push rod 5. The reset blocking rod 2021 will cause the pressure plate 202 to move down and reset under the friction and squeezing action between the upper roller frame 102, so as to prepare for the integration of the pressure rollers of the plate after subsequent regulation.

[0035] In the disclosed embodiment, a track block 1051 with a "T"-shaped cross-section is provided on the side of the pressure frame 105, and an upper limit track groove 1021 is provided inside the upper roller frame 102. The track block 1051 is inserted into the upper limit track groove 1021, and a reset blocking rod 2021 is provided on the top of the pressure plate 202. During use, the maximum roller pressure of the control component can be freely adjusted and used through the adjustment mechanism 3. When the positioning rod 302 is rotated, the positioning rod 302 can drive the positioning plate 301 to move up and down along the support rod 201 to change the use position through the rod body thread. The change in the use position of the positioning plate 301 changes the initial compression length of the pressure top spring 2011, that is, the maximum value of the roller pressure. The adjustment is convenient and the use is flexible.

[0036] Description of production process: This process adopts three-layer co-extrusion technology, the middle layer is the foaming layer, and the upper and lower layers are non-foaming layers.

[0037] Foaming layer: Resin raw materials, nucleating agents, additives and foaming agents (carbon dioxide) are melt-blended in a twin-screw extruder, precisely metered by a melt metering pump, further homogenized and mixed by a static mixer, and enter the middle layer of the three-layer mold through a distributor. At the moment the melt is extruded from the die lip, the pressure suddenly drops, and the foaming agent rapidly expands around the bubble core to form a dense honeycomb cell structure.

[0038] Non-foamed layer: After the resin raw materials and additives are melt-blended by a single-screw extruder, they are precisely metered by a melt metering pump and divided into two paths by a distributor, entering the upper and lower layers of the mold respectively, wrapping the foamed layer in the middle to avoid the rupture of the bubbles on the surface of the foamed layer. At the same time, the non-foamed layer can maintain good mechanical strength of the board.

[0039] After the foaming layer and the non-foaming layer are extruded through the die, they quickly enter the pressing roller for shaping and cooling, and extrude a diffusion plate product with a certain texture to prevent the foaming agent from continuously expanding in the high-temperature melt, resulting in excessively large pores.

[0040] Carbon dioxide injection system: The foaming agent carbon dioxide is stored in a steel cylinder in liquid form, and is metered and pressurized by a high-pressure metering pump, and the back pressure valve is used for backup pressure, ensuring that the carbon dioxide is accurately and stably injected into the twin-screw extruder through the injection valve according to the flow rate and pressure setting values ​​of the process conditions, and is evenly distributed in the resin melt through the blending of the twin-screw extruder. (The difficulty lies in the high-pressure, accurate and stable delivery of trace gas components.) Melt metering pumps are mainly used to accurately and stably control the ratio (or thickness ratio) of foaming layer and non-foaming layer materials, and the stability of sheet thickness. Melt metering pumps can be used with loss-in-weight scales to adjust the processing load of the production line, the body pressure of the screw blending system, etc.

[0041] The main function of the pressure roller is to cool and shape the foamed diffusion plate and convey the plate. By adjusting the traction speed of the pressure roller, the gap and temperature of the rollers, the thickness and surface shape of the diffusion plate can be adjusted.

[0042] Specific usage and function of this embodiment: In the present invention, according to the actual processing and production needs, the maximum limit pressure of the control component is adjusted, and the maximum roller pressure of the control component can be freely adjusted and used through the adjustment mechanism 3. When the positioning rod 302 is rotated, the positioning rod 302 can drive the positioning plate 301 to move up and down along the support rod 201 to change the use position through the rod body thread. The change of the use position of the positioning plate 301 changes the initial compression length of the pressure top spring 2011, that is, the maximum value of the roller pressure. The roller assembly 1 can realize the processing operation of integrating the roller on the plate. When it is in the reset state (the track block 1051 is at the top of the upper limit track groove 1021), the reset blocking rod 2021 contacts the bottom of the upper roller frame 102, thereby Under the action of the groove 1021 and the reset blocking rod 2021, the positions of various components when the control assembly is in the reset state are positioned. Under the clamping action of the retaining tooth block 2032 and the straight edge of the tooth groove 2012, the pressure plate 202 cannot move upward on the support rod 201 at this time, so that the two ends of the pressure top spring 2011 can contact between the pressure plate 202 and the positioning plate 301 to open the pressure plate 202 and the pressure frame 105. Because the pressure frame 105 does not fall out of the bottom of the support rod 201 under the action of the retaining ring 2013, the distance between the pressure plate 202 and the positioning plate 301 is fixed at this time, and the pressure frame 105, the support rod 201 and the pressure plate 202 form a whole for use, which can be achieved by the extension and retraction of the lifting push rod 5. The whole is driven to move up and down to change the distance between the laminating roller 104 and the driving roller 103, that is, the thickness of the plate during the laminating processing. After that, the driving motor 4 drives the driving roller 103 to rotate, and the plate can be inserted between the laminating roller 104 and the driving roller 103 for laminating processing. The control component can limit and control the maximum laminating roller pressure. During the laminating process, when the laminating roller resistance (that is, the resistance of the plate during the laminating roller integration process) is less than the laminating roller pressure (the force of the pressure top spring 2011 to open the pressure plate 202 and the pressure frame 105), the laminating roller resistance cannot cause the pressure top spring 2011 to deform, so that the pressure frame 105, the support rod 201 and the pressure plate 202 can be stably maintained as a whole when in the normal processing state. When used, the plate can be stably subjected to roller integration processing. The control component realizes the limit protection function by changing the distance between the pressure plate 202 and the pressure frame 105. When the pressure roller resistance is greater than the pressure roller pressure, the increase in the pressure roller resistance will cause the pressure frame 105 to move upward along the support rod 201 and compress the pressure top spring 2011. Since the resistance rod 204 is in contact with the pressure frame 105, when the pressure frame 105 moves, it can drive the resistance rod 204 to move upward synchronously and compress the resistance top spring 2041. When the resistance rod 204 moves upward, the linkage rod 2042 can drive the retaining tooth block 2032 to move to one side through the linkage groove 2031, thereby releasing the clamping relationship between the retaining tooth block 2032 and the straight edge of the tooth groove 2012.The return blocking rod 2021 will cause the pressure plate 202 to move downward and reset under the action of the contact and extrusion between the upper roller frame 102, so as to prepare for the integration of the pressure rollers of the plate after subsequent regulation. ,

[0043] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0044] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0045] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A physical foaming diffusion plate production system, comprising: A pressure roller assembly (1), a drive motor (4) and a lifting push rod (5), wherein the pressure roller assembly (1) comprises a lower roller seat (101), an upper roller frame (102), a drive roller (103) and a pressing roller (104), wherein the upper roller frame (102) is fixedly mounted on the top of the lower roller seat (101), and the drive roller (103) is rotatably connected to the inside of the lower roller seat (101), the drive motor (4) is fixedly mounted on the side of the lower roller seat (101), the drive motor (4) is transmission-connected to the rotating shaft of the drive roller (103), and the lifting push rod (5) is fixedly mounted on the top of the upper roller frame (102); the pressure roller assembly (1) further comprises a pressure frame (105), the pressure frame (105) is plugged into the inside of the upper roller frame (102), and the pressing roller (104) is rotatably connected to the inside of the pressure frame (105); a control assembly, wherein the control assembly comprises a pressure mechanism (2) and an adjustment mechanism (3); The pressure mechanism (2) comprises a support rod (201), a pressure plate (202), a retaining block (203) and a resisting rod (204); the top of the support rod (201) is fixedly connected to the bottom end of the push rod of the lifting push rod (5), and the bottom of the support rod (201) is inserted into the inside of the pressure frame (105); the pressure plate (202) is inserted into the outside of the support rod (201); the retaining block (203) is radially inserted into the inside of the pressure plate (202), and the resisting rod (204) is axially inserted into the inside of the pressure plate (202); The adjustment mechanism (3) comprises a positioning plate (301) and a positioning rod (302), wherein the positioning plate (301) is plugged into the outside of the support rod (201), and the positioning rod (302) is rotatably connected to the top of the pressure frame (105).

2. A physical foaming diffusion plate production system as claimed in claim 1, characterized in that: The support rod (201) is sleeved with a pressure spring (2011) on its exterior, and two ends of the pressure spring (2011) respectively abut against the bottom of the pressure plate (202) and the top of the positioning plate (301).

3. A physical foaming diffusion plate production system as claimed in claim 2, characterized in that: The bottom end of the rod body of the resistance rod (204) resists against the top of the pressure frame (105), and a resistance top spring (2041) is provided at the top of the resistance rod (204), and the two ends of the resistance top spring (2041) resist against the inside of the pressure plate (202) and the top of the resistance rod (204) respectively.

4. A physical foaming diffusion plate production system as claimed in claim 3, characterized in that: A linkage rod (2042) is provided inside the abutment rod (204), and an inclined linkage groove (2031) is provided inside the retaining block (203), and the linkage rod (2042) is inserted into the linkage groove (2031).

5. A physical foaming diffusion plate production system as claimed in claim 4, characterized in that: A retaining tooth block (2032) is provided on the side of the retaining block (203), and a retaining tooth groove (2012) is provided on the side of the support rod (201); the latching teeth of the retaining tooth block (2032) and the tooth groove cross-section of the retaining tooth groove (2012) are both right-angled triangles; under the action of the resisting top spring (2041), when the resisting rod (204) is not subjected to external force compression, the retaining tooth block (2032) is inserted into the interior of the retaining tooth groove (2012); and when the pressure plate (202) moves upward outside the support rod (201), the latching teeth straight edge of the retaining tooth block (2032) and the tooth groove straight edge of the retaining tooth groove (2012) are engaged.

6. A physical foaming diffusion plate production system as claimed in claim 5, characterized in that: A retaining ring (2013) is provided at the bottom of the support rod (201), and the outer diameter of the retaining ring (2013) is greater than the inner diameter of the support rod (201), and the retaining ring (2013) is located at one end of the support rod (201) passing through the pressure frame (105).

7. A physical foaming diffusion plate production system as claimed in claim 6, characterized in that: The rod body of the positioning rod (302) is provided with threads on the outside, and the positioning rod (302) is screwed to the inside of the positioning plate (301) through the rod body threads.

8. A physical foaming diffusion plate production system as claimed in claim 7, characterized in that: A track block (1051) with a "T"-shaped cross section is provided on the side of the pressure frame (105), and an upper limit track groove (1021) is provided inside the upper roller frame (102), and the track block (1051) is inserted into the upper limit track groove (1021).

9. A physical foaming diffusion plate production system as claimed in claim 8, characterized in that: A reset blocking rod (2021) is provided on the top of the pressure plate (202).

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