Manufacturing method of heat exchange plate of acid and alkali resistant temperature controller

Abstract

The invention discloses a method for manufacturing a heat exchange plate of an acid and alkali resistant temperature controller, and aims to overcome the defects that a common acid and alkali resistant heat exchange plate is limited by foreign technologies and is high in cost. The method comprises the following steps: S1, loading a substrate made of a carbon material on a bottom plate; s2, loading an acid and alkali resistant protective film on the substrate; s3, loading a pressing pad above the protective film; s4, a pressing plate is loaded above the pressing pad, and the pressing plate and the bottom plate are connected together in a fastened mode to form a tool; s5, the tool is heated to the set temperature and subjected to heat preservation; s6, the tool is disassembled after being cooled; and S7, the redundant protective film on the edge of the substrate is cut off, and the substrate covered with the protective film is cleaned and dried. The heat exchange plate manufactured through the manufacturing method of the heat exchange plate of the acid and alkali resistant temperature controller is good in heat conductivity and acid and alkali resistance, acid and alkali liquid can be isolated on the premise that the heat conduction efficiency is guaranteed, the manufacturing process is simple, and cost is low.

Description

Technical Field

[0001] The invention relates to a temperature controller, and more particularly to a method for manufacturing a heat exchange plate of an acid- and alkali-resistant temperature controller. Background Art

[0002] At present, with the progress of the times, my country has made great progress in the fields of semiconductors, chemical engineering, biology, etc., but the equipment for precise temperature control of acid and alkali liquids has always been controlled by foreign brands such as SMC. Not only is it expensive, but the delivery time is very long, and reservations need to be made one year in advance or even longer. Therefore, China needs its own high-precision acid and alkali liquid temperature control equipment, and how to manufacture a heat exchange plate that can isolate acid and alkali liquids while ensuring the heat conduction efficiency has become a key link. The commonly used acid and alkali resistant heat exchange plates are subject to foreign technology and are costly. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a method for manufacturing a heat exchange plate of an acid- and alkali-resistant temperature controller. The heat exchange plate has good thermal conductivity and good acid- and alkali resistance. It can isolate acid and alkali liquids while ensuring heat conduction efficiency. The manufacturing process is simple and the cost is low.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a method for manufacturing a heat exchange plate of an acid- and alkali-resistant temperature controller, comprising the following steps: S1, loading a carbon substrate onto a bottom plate; S2, loading an acid- and alkali-resistant protective film onto the substrate; S3, loading a pressing pad above the protective film; S4, loading a pressing plate above the pressing pad, and fastening the pressing plate and the bottom plate together to form a tooling; S5, heating the tooling to a set temperature and keeping it warm; S6, disassembling the tooling after cooling; S7, cutting off excess protective film at the edge of the substrate, and cleaning and drying the substrate covered with the protective film.

[0005] In this patent application, an acid- and alkali-resistant protective film is coated on a carbon substrate to form a heat-resistant and corrosion-resistant heat exchange plate. The heat exchange plate has good thermal conductivity, which is beneficial to improving the heat exchange efficiency. During the coating process, the substrate is first loaded onto the bottom plate, and then the protective film and the pressing pad are loaded onto the substrate in sequence. After that, the pressing plate is pressed onto the pressing pad, and the pressing plate and the bottom plate are fastened together. At this time, the substrate and the protective film are pressed together. Then the entire tooling is heated, and the protective film is melted and reshaped by the heat, so that the protective film and the substrate are connected as a whole. After cooling, it is removed, and the excess protective film on the edge of the substrate is cut off. After cleaning and drying, the heat exchange plate is completed.

[0006] The heat exchange plate produced by the method for producing the heat exchange plate of the acid- and alkali-resistant temperature controller of the patent application has good thermal conductivity and good acid- and alkali-resistant performance, can isolate acid and alkali liquids while ensuring the heat conduction efficiency, and has a simple production process and low cost.

[0007] Preferably, the material of the protective film is polytetrafluoroethylene-perfluoroalkoxy ether copolymer.

[0008] Polytetrafluoroethylene-perfluoroalkoxy ether copolymer (PFA) is made by copolymerizing polytetrafluoroethylene and perfluoroalkoxy ether under heating conditions. Like polytetrafluoroethylene, it has extremely high corrosion resistance to all chemicals and hardly reacts with any chemicals. However, unlike polytetrafluoroethylene, PFA can be melted and reshaped without the use of adhesives. PFA can be directly melted on the surface of the substrate.

[0009] Preferably, the substrate is made of a carbon material with a thermal conductivity of 150-170 W / (m·K) and an ash content of less than 50 PPM.

[0010] The substrate made of this material has good thermal conductivity.

[0011] Preferably, the protective film is produced by chip processing, and the produced protective film is pickled to remove surface metal ions.

[0012] The metal ions of the protective film made by cutting will only adhere to the surface, and the metal ions on the surface can be removed by pickling, while there will be no metal ions mixed inside the protective film.

[0013] Preferably, the compression pad is a foamed silicone pad.

[0014] The foam silicone pad is soft and elastic. The foam silicone pad is pressed tightly on the protective film to ensure that each position of the protective film is reliably pressed on the substrate.

[0015] Preferably, Teflon cloth is loaded on both the upper and lower sides of the compression pad.

[0016] The Teflon cloth has non-stick properties, which prevents the pressing pad and the protective film from sticking together, and prevents the pressing pad and the pressing plate from sticking together.

[0017] Preferably, the protective film is coated with silicone oil on the surface opposite to the pressure pad.

[0018] Apply a layer of silicone oil between the protective film and the pressure pad to prevent the protective film and the pressure pad from sticking to each other.

[0019] Preferably, in S5, the temperature is set at 290-310°C and kept warm for 4-6 minutes.

[0020] The heating temperature and holding time should be set appropriately to ensure the connection between the protective film and the substrate. Avoid scar-like marks caused by too long heating time.

[0021] Preferably, in S5, the tooling is placed in a vacuum furnace for heating.

[0022] Heating is carried out in a vacuum furnace, and the heating effect is good.

[0023] Preferably, a serpentine heat exchange channel is provided inside the bottom plate and the pressure plate; during S6, coolant is transported into the heat exchange channel to cool the tooling.

[0024] During the cooling process, coolant is introduced into the heat exchange channels in the bottom plate and the pressure plate, resulting in a good cooling effect.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the heat exchange plate manufactured by the method for manufacturing the heat exchange plate of the acid- and alkali-resistant temperature controller of the patent application has good thermal conductivity and good acid- and alkali-resistant performance, can isolate acid and alkali liquids while ensuring heat conduction efficiency, and has a simple manufacturing process and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the heat exchange plate of the present invention.

[0027] Figure 2 It is a schematic diagram of a tooling of the present invention.

[0028] Figure 3 It is a cross-sectional view of the tooling of Example 1 of the present invention.

[0029] Figure 4 It is an exploded view of embodiment 1 of the present invention.

[0030] Figure 5 It is a cross-sectional view of the tooling of Example 2 of the present invention.

[0031] Figure 6 It is a cross-sectional view of the tooling of Example 3 of the present invention.

[0032] Figure 7 This is a schematic diagram of the protective film cutting principle of Example 3 of the present invention.

[0033] In the figure: 1, base plate, 2, bottom plate, 3, groove, 4, oil retaining convex ring, 5, guide groove, 6, protective film, 7, clamping pad, 8, Teflon cloth, 9, pressure plate, 10, fastening screw, 11, countersunk hole, 12, threaded hole, 13, cross bar, 14, sliding column, 15, oil scraper, 16, cutting knife, 17, slide groove, 18, guide plate, 19, heat exchange channel. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A method for manufacturing a heat exchange plate of an acid-base resistant thermostat (see attached Figure 1 To Attachment Figure 4), comprising the following steps: S1, loading a carbon substrate 1 onto a bottom plate 2; the substrate 1 is made of a carbon material having a thermal conductivity of 150-170 W / (m·K) and an ash content of less than 50 PPM. In this embodiment, the thermal conductivity of the carbon material selected for the substrate 1 is 160 W / (m·K).

[0035] S2, load the acid and alkali resistant protective film 6 onto the substrate 1; the protective film 6 is loaded in the middle of the substrate 1, and the material of the protective film 6 is polytetrafluoroethylene-perfluoroalkoxy ether copolymer, abbreviated as PFA, which is formed by copolymerizing polytetrafluoroethylene and perfluoroalkoxy ether under heating conditions. Like polytetrafluoroethylene, it has extremely high corrosion resistance to all chemicals and hardly reacts with any chemicals, but unlike polytetrafluoroethylene, PFA can be melted and reshaped, and adhesives are not used. PFA is directly melted on the surface of the substrate 1. The protective film 6 is obtained by chip cutting, and the obtained protective film 6 is pickled to remove surface metal ions. The metal ions of the protective film 6 obtained by cutting will only adhere to the surface, and the metal ions on the surface can be removed by pickling, and the protective film 6 will not be mixed with metal ions.

[0036] S3, a pressing pad 7 is loaded on top of the protective film 6; silicone oil is applied on the surface of the protective film 6 opposite to the pressing pad 7, and the silicone oil is dimethyl silicone oil. A layer of silicone oil is brushed between the protective film 6 and the pressing pad 7 to prevent the protective film 6 and the pressing pad 7 from sticking together. The pressing pad 7 is a foamed silicone pad. The foamed silicone pad is soft and elastic. The foamed silicone pad is pressed against the protective film 6 to ensure that each position of the protective film 6 is reliably pressed against the substrate 1. Teflon cloth 8 is loaded on both the upper and lower sides of the pressing pad 7. Teflon cloth 8 is non-sticky, which prevents the pressing pad 7 and the protective film 6 from sticking together, and prevents the pressing pad 7 and the pressing plate 9 from sticking together.

[0037] S4, a pressing plate 9 is loaded on the pressing pad 7, and the pressing plate 9 and the bottom plate 2 are fastened together to form a tooling; a plurality of fastening screws 10 are connected to the edges of the pressing plate 9 and the bottom plate 2, and the fastening screws 10 fasten the pressing plate 9 and the bottom plate 2. Countersunk holes 11 are provided on the pressing plate 9 corresponding to the fastening screws 10, and threaded holes 12 are provided on the bottom plate 2 corresponding to the fastening screws 10. The fastening screws 10 pass through the countersunk holes 11 and are adapted to be connected with the threaded holes 12, and the nut end of the fastening screws 10 abuts against the bottom surface of the countersunk holes 11.

[0038] S5, heating the tooling to a set temperature and keeping it warm; placing the tooling in a vacuum furnace for heating. The temperature is set at 290-310°C and kept warm for 4-6 minutes. In this embodiment, the temperature is set at 300°C and kept warm for 5 minutes.

[0039] S6, the tooling is disassembled after cooling; during cooling, the bottom plate 2 is placed on a water cooling plate, and a water cooling plate is placed on the pressing plate 9, so that the entire tooling is cooled by the water cooling plate. After cooling, the tooling is disassembled and the substrate 1 covered with the protective film is taken out.

[0040] S7, cut off the excess protective film 6 at the edge of the substrate 1, wipe off the silicone oil on the surface, and clean and dry the substrate 1 covered with the protective film 6 to obtain a heat exchange plate. When cleaning, place the substrate 1 in an ultrasonic cleaning machine filled with 13% silicone oil cleaning agent and clean it at 100°C for 30 minutes. Take out the substrate 1 from the ultrasonic cleaning machine and rinse it with pure water for several times, place it in a dryer at 100°C for 1 hour, and let it cool.

[0041] During the specific operation, first cut and prepare the materials. The required materials include foam silicone pad, Teflon cloth 8, and protective film 6. Cut them to the appropriate size as needed. Then place the substrate 1 in the middle of the bottom plate 2 of the laminating tooling, place the protective film 6 on the substrate 1, and evenly apply dimethyl silicone oil on the outer side of the protective film 6. Be careful not to stain the substrate 1. Then place the Teflon cloth 8, foam silicone pad, Teflon cloth 8, and laminating tooling plate 9 in sequence, and finally tighten the cross pan head fastening screws 10 and evenly apply a torque of 1N·M. Then place the installed tooling on the heating table in the vacuum heating furnace, and monitor the temperature of the substrate 1. After reaching 300°C, keep it for 5 minutes. Take the heated tooling out of the heating furnace and transfer it to the water-cooled plate, and also set a water-cooled plate on the laminating tooling plate 9, and disassemble it after cooling. Remove the excess protective film 6 on the edge of the coated substrate 1, wipe off most of the silicone oil on the surface, place it in an ultrasonic cleaner filled with 13% silicone oil detergent, and clean it at 100°C for 30 minutes. Take out the substrate 1 from the ultrasonic cleaner and rinse it with pure water for several times, place it in a dryer at 100°C for 1 hour, and then cool it down to get the heat exchange plate.

[0042] In this patent application, an acid- and alkali-resistant protective film 6 is coated on a carbon substrate 1 to form a heat-resistant and corrosion-resistant heat exchange plate. The heat exchange plate has good thermal conductivity, which is beneficial to improving the heat exchange efficiency. During the coating process, the substrate 1 is first loaded onto the bottom plate 2, and then the protective film 6 and the pressing pad 7 are loaded onto the substrate 1 in sequence. After that, the pressing plate 9 is pressed onto the pressing pad 7. The pressing plate 9 is fastened together with the bottom plate 2. At this time, the substrate 1 and the protective film 6 are pressed together. Then the entire tooling is heated, and the protective film 6 is melted and reshaped by the heat, so that the protective film 6 is connected to the substrate 1 as a whole. After cooling, it is removed, and the excess protective film 6 on the edge of the substrate 1 is cut off. After cleaning and drying, the heat exchange plate is completed.

[0043] The heat exchange plate produced by the method for producing the heat exchange plate of the acid- and alkali-resistant temperature controller of the patent application has good thermal conductivity and good acid- and alkali-resistant performance, can isolate acid and alkali liquids while ensuring the heat conduction efficiency, and has a simple production process and low cost.

[0044] Example 2: A method for manufacturing a heat exchange plate of an acid-base resistant thermostat (see attached Figure 5 ), including the following steps: S1, loading a carbon substrate 1 onto a bottom plate 2; the substrate 1 is made of a carbon material with a thermal conductivity of 150-170W / (m·K) and an ash content of less than 50PPM. In this embodiment, the thermal conductivity of the carbon material selected for the substrate 1 is 160W / (m·K). A groove 3 adapted to the substrate 1 is provided on the bottom plate 2, and the lower part of the substrate 1 is adapted to be installed in the groove 3, which plays a good positioning role.

[0045] S2, load the acid and alkali resistant protective film 6 onto the substrate 1; the protective film 6 is loaded in the middle of the substrate 1, and the material of the protective film 6 is polytetrafluoroethylene-perfluoroalkoxy ether copolymer, abbreviated as PFA, which is formed by copolymerizing polytetrafluoroethylene and perfluoroalkoxy ether under heating conditions. Like polytetrafluoroethylene, it has extremely high corrosion resistance to all chemicals and hardly reacts with any chemicals, but unlike polytetrafluoroethylene, PFA can be melted and reshaped, and adhesives are not used. PFA is directly melted on the surface of the substrate 1. The protective film 6 is obtained by chip cutting, and the obtained protective film 6 is pickled to remove surface metal ions. The metal ions of the protective film 6 obtained by cutting will only adhere to the surface, and the metal ions on the surface can be removed by pickling, and the protective film 6 will not be mixed with metal ions.

[0046] S3, a pressing pad 7 is loaded on top of the protective film 6; silicone oil is applied on the surface of the protective film 6 opposite to the pressing pad 7, and the silicone oil is dimethyl silicone oil. A layer of silicone oil is brushed between the protective film 6 and the pressing pad 7 to prevent the protective film 6 and the pressing pad 7 from sticking together. The pressing pad 7 is a foamed silicone pad. The foamed silicone pad is soft and elastic. The foamed silicone pad is pressed against the protective film 6 to ensure that each position of the protective film 6 is reliably pressed against the substrate 1. Teflon cloth 8 is loaded on both the upper and lower sides of the pressing pad 7. Teflon cloth 8 is non-sticky, which prevents the pressing pad 7 and the protective film 6 from sticking together, and prevents the pressing pad 7 and the pressing plate 9 from sticking together.

[0047] S4, a pressing plate 9 is loaded on the pressing pad 7, and the pressing plate 9 and the bottom plate 2 are fastened together to form a tooling; a plurality of fastening screws 10 are connected to the edges of the pressing plate 9 and the bottom plate 2, and the fastening screws 10 fasten the pressing plate 9 and the bottom plate 2. Countersunk holes 11 are provided on the pressing plate 9 corresponding to the fastening screws 10, and threaded holes 12 are provided on the bottom plate 2 corresponding to the fastening screws 10. The fastening screws 10 pass through the countersunk holes 11 and are adapted to be connected with the threaded holes 12, and the nut end of the fastening screws 10 abuts against the bottom surface of the countersunk holes 11.

[0048] S5, heating the tooling to a set temperature and keeping it warm; placing the tooling in a vacuum furnace for heating. The temperature is set at 290-310°C and kept warm for 4-6 minutes. In this embodiment, the temperature is set at 300°C and kept warm for 5 minutes.

[0049] S6, the tooling is disassembled after cooling; a serpentine heat exchange channel 19 is provided inside the bottom plate 2 and the pressure plate 9; during S6, coolant is transported into the heat exchange channel 19 to cool the tooling. A liquid inlet and a liquid outlet connected to the heat exchange channel 19 are provided on the bottom plate 2 and the pressure plate 9, and the coolant enters from the liquid inlet and is discharged from the liquid outlet. After cooling is completed, the tooling is disassembled and the substrate 1 covered with a protective film is taken out.

[0050] S7, cut off the excess protective film 6 at the edge of the substrate 1, wipe off the silicone oil on the surface, and clean and dry the substrate 1 covered with the protective film 6 to obtain a heat exchange plate. When cleaning, place the substrate 1 in an ultrasonic cleaning machine filled with 13% silicone oil cleaning agent and clean it at 100°C for 30 minutes. Take out the substrate 1 from the ultrasonic cleaning machine and rinse it with pure water for several times, place it in a dryer at 100°C for 1 hour, and let it cool.

[0051] During the specific operation, first cut and prepare the materials. The required materials include foamed silicone pad, Teflon cloth 8, and protective film 6. Cut the appropriate size as needed. Then place the substrate 1 in the middle of the bottom plate 2 of the laminating tooling, place the protective film 6 on the substrate 1, and evenly apply dimethyl silicone oil on the outer side of the protective film 6. Be careful not to stain the substrate 1. Then place the Teflon cloth 8, foamed silicone pad, Teflon cloth 8, and laminating tooling press plate 9 in sequence, and finally tighten the cross pan head fastening screws 10 and evenly apply a torque of 1N·M. Then place the installed tooling on the heating table in the vacuum heating furnace, and monitor the temperature of the substrate 1. After reaching 300℃, keep it for 5 minutes. Take the heated tooling out of the heating furnace, and deliver coolant to the heat exchange channel 19 on the bottom plate 2 and the press plate 9 to cool the tooling. The coolant enters from the liquid inlet and is discharged from the liquid outlet. Disassemble the tooling after cooling. Remove the excess protective film 6 on the edge of the coated substrate 1, wipe off most of the silicone oil on the surface, place it in an ultrasonic cleaner filled with 13% silicone oil detergent, and clean it at 100°C for 30 minutes. Take out the substrate 1 from the ultrasonic cleaner and rinse it with pure water for several times, place it in a dryer at 100°C for 1 hour, and then cool it down to get the heat exchange plate.

[0052] In this patent application, an acid- and alkali-resistant protective film 6 is coated on a carbon substrate 1 to form a heat-resistant and corrosion-resistant heat exchange plate. The heat exchange plate has good thermal conductivity, which is beneficial to improving the heat exchange efficiency. During the coating process, the substrate 1 is first loaded onto the bottom plate 2, and then the protective film 6 and the pressing pad 7 are loaded onto the substrate 1 in sequence. After that, the pressing plate 9 is pressed onto the pressing pad 7. The pressing plate 9 is fastened together with the bottom plate 2. At this time, the substrate 1 and the protective film 6 are pressed together. Then the entire tooling is heated, and the protective film 6 is melted and reshaped by the heat, so that the protective film 6 is connected to the substrate 1 as a whole. After cooling, it is removed, and the excess protective film 6 on the edge of the substrate 1 is cut off. After cleaning and drying, the heat exchange plate is completed.

[0053] The heat exchange plate produced by the method for producing the heat exchange plate of the acid- and alkali-resistant temperature controller of the patent application has good thermal conductivity and good acid- and alkali-resistant performance, can isolate acid and alkali liquids while ensuring the heat conduction efficiency, and has a simple production process and low cost.

[0054] Example 3: A method for manufacturing a heat exchange plate of an acid-base resistant thermostat (see attached Figure 6 , Attachment Figure 7 ), including the following steps: S1, loading a carbon substrate 1 onto a bottom plate 2; the substrate 1 is made of a carbon material with a thermal conductivity of 150-170W / (m·K) and an ash content of less than 50PPM. In this embodiment, the thermal conductivity of the carbon material selected for the substrate 1 is 160W / (m·K). A groove 3 adapted to the substrate 1 is provided on the bottom plate 2, and the lower part of the substrate 1 is adapted to be installed in the groove 3, which plays a good positioning role. A circle of oil-blocking convex rings 4 are provided on the periphery of the substrate 1 on the bottom plate 2, and a guide groove 5 is provided on the oil-blocking convex ring 4. The substrate 1 is a rectangular structure, and the oil-blocking convex ring 4 is a rectangular frame structure. The upper end of the oil-blocking convex ring 4 is lower than the upper end of the substrate 1.

[0055] S2, load the acid and alkali resistant protective film 6 onto the substrate 1; the protective film 6 is loaded in the middle of the substrate 1, and the material of the protective film 6 is polytetrafluoroethylene-perfluoroalkoxy ether copolymer, abbreviated as PFA, which is formed by copolymerizing polytetrafluoroethylene and perfluoroalkoxy ether under heating conditions. Like polytetrafluoroethylene, it has extremely high corrosion resistance to all chemicals and hardly reacts with any chemicals, but unlike polytetrafluoroethylene, PFA can be melted and reshaped, and adhesives are not used. PFA is directly melted on the surface of the substrate 1. The protective film 6 is obtained by chip cutting, and the obtained protective film 6 is pickled to remove surface metal ions. The metal ions of the protective film 6 obtained by cutting will only adhere to the surface, and the metal ions on the surface can be removed by pickling, and the protective film 6 will not be mixed with metal ions.

[0056] S3, a pressing pad 7 is loaded on top of the protective film 6; silicone oil is applied on the surface of the protective film 6 opposite to the pressing pad 7, and the silicone oil is dimethyl silicone oil. A layer of silicone oil is brushed between the protective film 6 and the pressing pad 7 to prevent the protective film 6 and the pressing pad 7 from sticking together. The pressing pad 7 is a foamed silicone pad. The foamed silicone pad is soft and elastic. The foamed silicone pad is pressed against the protective film 6 to ensure that each position of the protective film 6 is reliably pressed against the substrate 1. Teflon cloth 8 is loaded on both the upper and lower sides of the pressing pad 7. Teflon cloth 8 is non-sticky, which prevents the pressing pad 7 and the protective film 6 from sticking together, and prevents the pressing pad 7 and the pressing plate 9 from sticking together.

[0057] S4, a pressing plate 9 is loaded on the pressing pad 7, and the pressing plate 9 and the bottom plate 2 are fastened together to form a tooling; a plurality of fastening screws 10 are connected to the edges of the pressing plate 9 and the bottom plate 2, and the fastening screws 10 fasten the pressing plate 9 and the bottom plate 2. Countersunk holes 11 are provided on the pressing plate 9 corresponding to the fastening screws 10, and threaded holes 12 are provided on the bottom plate 2 corresponding to the fastening screws 10. The fastening screws 10 pass through the countersunk holes 11 and are adapted to be connected with the threaded holes 12, and the nut end of the fastening screws 10 abuts against the bottom surface of the countersunk holes 11.

[0058] S5, heating the tooling to a set temperature and keeping it warm; placing the tooling in a vacuum furnace for heating. The temperature is set at 290-310°C and kept warm for 4-6 minutes. In this embodiment, the temperature is set at 300°C and kept warm for 5 minutes.

[0059] S6, the tooling is disassembled after cooling; a serpentine heat exchange channel 19 is provided inside the bottom plate 2 and the pressure plate 9; during S6, coolant is transported into the heat exchange channel 19 to cool the tooling. A liquid inlet and a liquid outlet connected to the heat exchange channel 19 are provided on the bottom plate 2 and the pressure plate 9, and the coolant enters from the liquid inlet and is discharged from the liquid outlet. After cooling is completed, the tooling is disassembled, and the substrate 1 remains on the bottom plate 2.

[0060] S7, cut off the excess protective film 6 at the edge of the substrate 1, wipe off the silicone oil on the surface, and clean and dry the substrate 1 covered with the protective film 6 to obtain a heat exchange plate. The cutting tool is used to simultaneously perform the cutting of the excess protective film 6 and the wiping of the silicone oil. The cutting tool includes a cross bar 13 and two sliding columns 14. The two sliding columns 14 are slidably connected to the cross bar 13. The lower end of the sliding column 14 is a conical structure. The sliding column 14 can pierce the protective film 6 during the installation of the guide groove 5. The lower part of the sliding column 14 is inserted into the guide groove 5 on the oil retaining convex ring 4. The cross bar 13 is equipped with an oil scraper 15, which is attached to the surface of the protective film 6. The sliding column 14 is provided with a cutting knife 16, and the blade of the cutting knife 16 is close to the edge of the substrate 1. A slide groove 17 is provided on the crossbar 13, and a guide piece 18 is provided on the slide column 14. The guide piece 18 is inserted into the slide groove 17 and can slide along the slide groove 17. After the slide column 14 is adjusted into place, the slide column 14 is fastened to the crossbar 13 by screws. During operation, the crossbar 13 is pushed to move, the scraper strip 15 scrapes off the silicone oil, and the cutter 16 on the slide column 14 cuts off the excess protective film 6 on the edge of the substrate 1. After the excess protective film 6 on the two opposite sides is cut, the excess protective film 6 on the other two opposite sides is cut. After the excess protective film 6 is cut, the substrate 1 is removed for cleaning. During cleaning, the substrate 1 is placed in an ultrasonic cleaning machine filled with 13% silicone oil cleaning agent and cleaned at 100°C for 30 minutes. Take out the substrate 1 from the ultrasonic cleaning machine and rinse it with pure water for several times, place it in a dryer at 100°C for 1 hour, and let it cool.

[0061] During the specific operation, first cut and prepare the materials. The required materials include foamed silicone pad, Teflon cloth 8, and protective film 6. Cut the appropriate size as needed. Then place the substrate 1 in the middle of the bottom plate 2 of the laminating tooling, place the protective film 6 on the substrate 1, and evenly apply dimethyl silicone oil on the outer side of the protective film 6. Be careful not to stain the substrate 1. Then place the Teflon cloth 8, foamed silicone pad, Teflon cloth 8, and laminating tooling press plate 9 in sequence, and finally tighten the cross pan head fastening screws 10 and evenly apply a torque of 1N·M. Then place the installed tooling on the heating table in the vacuum heating furnace, and monitor the temperature of the substrate 1. After reaching 300℃, keep it for 5 minutes. Take the heated tooling out of the heating furnace, and deliver coolant to the heat exchange channel 19 on the bottom plate 2 and the press plate 9 to cool the tooling. The coolant enters from the liquid inlet and is discharged from the liquid outlet. Disassemble the tooling after cooling. The excess protective film 6 on the edge of the coated substrate 1 is removed, and most of the silicone oil on the surface is wiped off. The cutting tool is used to simultaneously remove the excess protective film 6 and wipe off the silicone oil. The substrate 1 is placed in an ultrasonic cleaning machine filled with 13% silicone oil detergent and cleaned at 100°C for 30 minutes. The substrate 1 is taken out of the ultrasonic cleaning machine and rinsed with pure water for several times, placed in a dryer at 100°C for 1 hour, and the heat exchange plate is obtained after cooling.

[0062] In this patent application, an acid- and alkali-resistant protective film 6 is coated on a carbon substrate 1 to form a heat-resistant and corrosion-resistant heat exchange plate. The heat exchange plate has good thermal conductivity, which is beneficial to improving the heat exchange efficiency. During the coating process, the substrate 1 is first loaded onto the bottom plate 2, and then the protective film 6 and the pressing pad 7 are loaded onto the substrate 1 in sequence. After that, the pressing plate 9 is pressed onto the pressing pad 7. The pressing plate 9 is fastened together with the bottom plate 2. At this time, the substrate 1 and the protective film 6 are pressed together. Then the entire tooling is heated, and the protective film 6 is melted and reshaped by the heat, so that the protective film 6 is connected to the substrate 1 as a whole. After cooling, it is removed, and the excess protective film 6 on the edge of the substrate 1 is cut off. After cleaning and drying, the heat exchange plate is completed.

[0063] The heat exchange plate produced by the method for producing the heat exchange plate of the acid- and alkali-resistant temperature controller of the patent application has good thermal conductivity and good acid- and alkali-resistant performance, can isolate acid and alkali liquids while ensuring the heat conduction efficiency, and has a simple production process and low cost.

[0064] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A method for manufacturing a heat exchange plate of an acid-base resistant thermostat, characterized in that: The following steps are involved: S1, loading the carbon substrate onto the bottom plate; S2, loading the acid- and alkali-resistant protective film onto the substrate; S3, loading the pressing pad on the top of the protective film; S4, loading the pressing plate on the pressing pad, and fastening the pressing plate and the bottom plate together to form a tooling; S5, heating the tooling to a set temperature and keeping it warm; S6, disassembling the tooling after cooling; S7, cutting off the excess protective film at the edge of the substrate, and cleaning and drying the substrate covered with the protective film.

2. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: The material of the protective film is polytetrafluoroethylene-perfluoroalkoxy ether copolymer.

3. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: The substrate is made of carbon material with a thermal conductivity of 150-170 W / (m·K) and an ash content of less than 50 PPM.

4. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: The protective film is obtained by chip processing, and the obtained protective film is pickled to remove surface metal ions.

5. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: The compression pad is a foam silicone pad.

6. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: The upper and lower sides of the pressing pad are loaded with Teflon cloth.

7. The method for manufacturing a heat exchange plate of an acid- and alkali-resistant thermostat according to claim 1, characterized in that: Protective film Apply silicone oil to the surface opposite to the pressure pad.

8. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: In S5, set the temperature to 290-310°C and keep warm for 4-6 minutes.

9. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to claim 1, characterized in that: In S5, the tooling is placed in a vacuum furnace for heating.

10. The method for manufacturing a heat exchange plate of an acid-base resistant thermostat according to any one of claims 1 to 9, characterized in that: A serpentine heat exchange channel is provided inside the bottom plate and the pressure plate; during the S6 process, coolant is transported into the heat exchange channel to cool the tooling.

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