CN118107180A - Preparation method of polytetrafluoroethylene cleaning box - Google Patents
Preparation method of polytetrafluoroethylene cleaning box Download PDFInfo
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- CN118107180A CN118107180A CN202311773359.8A CN202311773359A CN118107180A CN 118107180 A CN118107180 A CN 118107180A CN 202311773359 A CN202311773359 A CN 202311773359A CN 118107180 A CN118107180 A CN 118107180A
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- welding
- polytetrafluoroethylene
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- box body
- cleaning
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- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 158
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 158
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 153
- 238000004140 cleaning Methods 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 190
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 239000007921 spray Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000010408 sweeping Methods 0.000 claims abstract description 21
- 230000004907 flux Effects 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 10
- 229910000679 solder Inorganic materials 0.000 claims abstract description 10
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 37
- 210000001161 mammalian embryo Anatomy 0.000 claims description 33
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 9
- 239000008213 purified water Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 7
- 230000004927 fusion Effects 0.000 abstract description 6
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- 238000005516 engineering process Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000007789 sealing Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
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- 238000010128 melt processing Methods 0.000 description 1
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- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of cooling plates and discloses a preparation method of a polytetrafluoroethylene cleaning box body, wherein the cleaning box body comprises a polytetrafluoroethylene box body and polytetrafluoroethylene tubes, the polytetrafluoroethylene tubes are arranged on the polytetrafluoroethylene box body, and the preparation method is combined with the steps of: blank making, cleaning, polishing a welding part, cleaning the welding part, splicing a clamp, placing welding flux, heating and sweeping a spray gun, continuously sweeping at a high temperature, maintaining the welding temperature, cooling for the first time, cooling again, cleaning the box body, assembling, detecting the quality and the like. Effective welding, stable welding and the like of PTFE can be realized, and uniform tiny particles are presented on the welding surface, so that uniform aggregation of heat and uniform fusion welding are facilitated; by adopting the matched process of balanced heating, high-temperature maintenance, cooling to the welding temperature and two-stage cooling, the quick filling can be realized by balanced heating and high-temperature melting, the solder and the blank are slowly contacted and fused by cooling welding, and the polytetrafluoroethylene is recrystallized and polymerized by two-stage cooling.
Description
Technical Field
The invention relates to the technical field of cooling plates, in particular to a preparation method of a polytetrafluoroethylene cleaning box body.
Background
Currently, more and more organic composite components are used in a variety of industries, and assembly of composite components is typically performed by mechanical splicing of composite panels or bonding using adhesives. There are many disadvantages to the use of these two modes: mechanical splicing can enable gaps to exist between assembly parts, sealing performance is poor, plates can be damaged, if glue is adopted, the problems of insufficient adhesive strength, insufficient bonding capability of the glue and the plates, durability of the glue and the like can occur. Some organic composite materials are limited by the physical properties of the materials, and are difficult to assemble by mechanical splicing or adhesive bonding, especially polytetrafluoroethylene materials.
The polytetrafluoroethylene has good corrosion resistance and is a chemically inert material. The high-temperature-resistant polytetrafluoroethylene alloy can resist the corrosion of most corrosive chemicals, acid and alkali and organic solvents, such as concentrated nitric acid, concentrated hydrochloric acid, concentrated sulfuric acid, concentrated phosphoric acid, concentrated hydrofluoric acid, any concentrated alkali and the like, can still keep the stability and excellent corrosion resistance at high temperature, is not easy to melt, does not flow after being melted, presents a rubber state, and is difficult to weld or unstable to weld if the traditional hot melt processing welding is adopted, so that parts processed by polytetrafluoroethylene have instability, poor air tightness and the like; if the polytetrafluoroethylene plate is processed and welded by adopting a friction heating method, the polytetrafluoroethylene plate is difficult to weld and mold, and because the friction coefficient of the polytetrafluoroethylene material is very low, the polytetrafluoroethylene plate is likely to be slightly adhered due to strong friction driving.
The problems to be noted in welding polytetrafluoroethylene sheets include welding temperature, welding time, welding pressure, etc., of which the welding temperature and the welding time are important. If the temperature is too high or the time is too long, the polytetrafluoroethylene plate is burnt or melted, thereby affecting the welding effect and reducing the welding quality. In order to ensure the weld quality, special attention should be paid to these problems during operation.
Therefore, improvements are needed to address the polytetrafluoroethylene welding problems described above.
Disclosure of Invention
According to the invention, PTFE materials are selected, and effective welding, stable welding and the like of PTFE can be realized through cutting, milling, welding technology and the like of multiple procedures.
A method for preparing a cleaning case of polytetrafluoroethylene, the cleaning case comprising a polytetrafluoroethylene case and polytetrafluoroethylene tubes, the polytetrafluoroethylene tubes being mounted on the polytetrafluoroethylene case, the method comprising the steps of:
Step 1: embryo making
Selecting polytetrafluoroethylene plates and pipes, adopting a cutting machine tool to process the polytetrafluoroethylene plates and pipes into specification and size, and processing corresponding polytetrafluoroethylene box blanks and polytetrafluoroethylene pipe blanks;
Step 2: cleaning
Selecting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo in the step 1, putting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo into acetone cleaning liquid to clean organic matters such as surface oil stains, putting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo into absolute ethyl alcohol to clean the surface acetone, washing the ethanol on the surface of the polytetrafluoroethylene box body embryo with purified water, and naturally drying the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube after the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo are washed cleanly;
Step 3: polishing of welding part
Selecting the polytetrafluoroethylene box body material and polytetrafluoroethylene pipe material in the step 2, placing the polytetrafluoroethylene box body material and polytetrafluoroethylene pipe material on a grinding machine to be fixed, then starting a rough grinding head on the grinding machine to perform rough grinding on a welding position, processing a thin rough grinding layer on the welding position, and then selecting a fine grinding head on the grinding machine to perform fine grinding and grinding on the rough grinding layer to process a fine grinding layer;
Step 4: cleaning of welded joints
Selecting the welding part in the step 3, washing and cleaning the welding part with acetone, absolute ethyl alcohol and purified water in sequence, and naturally drying after the washing and cleaning to prepare a welding blank;
Step 5: clamp splicing
Selecting the welding blanks in the step 4, placing the welding blanks on a welding machine tool, fixing the welding blanks by using a clamp, wherein the welding positions of the welding blanks are opposite, and the welding interval is set to be 3-8 mm;
Step 6: placing solder
Selecting the welding blanks assembled in the step 5, selecting welding wire materials, wherein the size of the welding wire materials is larger than 1 time of the welding interval and smaller than 1.5 times of the welding interval, and placing the welding wire materials on the welding interval and stabilizing the welding wire materials, so that the placement of welding materials is completed;
step 7: spray gun heating and sweeping
Selecting a welding blank with the welding flux placed in the step 6, and heating and sweeping by adopting a heating spray gun on a machine table, wherein the spray gun is a spray gun with balanced temperature rise, the welding blank with the welding flux placed is gradually heated along with the balanced temperature rise of the spray gun, and the heating diameter of the spray gun is larger than the welding interval;
step 8: high temperature continuous sweeping
Based on the step 7, continuously and uniformly heating the spray gun, raising the temperature to be higher than the melting point temperature of polytetrafluoroethylene, reaching a high temperature, continuously sweeping at a high temperature for a period of time, and then completing the melting of the solder into a welding space and filling the welding space;
Step 9: welding temperature maintenance
Based on the step 8, for the high temperature and constant temperature environment, rapidly cooling to a welding temperature which is slightly higher than the melting point temperature of polytetrafluoroethylene, continuously sweeping the welding temperature for a period of time at constant temperature, and then continuously melting the solder into the welding space and filling the welding space;
Step 10: primary cooling
Selecting the welding flux and the welding blanks filled with the welding space in the step 9, and putting the welding flux and the welding blanks into a slow cooling chamber for balanced cooling to an intermediate temperature, wherein the intermediate temperature is 120-160 ℃;
Step 11: re-cooling
Selecting the welding flux and the welding blanks filled with the welding space in the step 10, and placing the welding flux and the welding blanks in a rapid cooling chamber for uniform cooling to room temperature to prepare a welded polytetrafluoroethylene blank;
Step 12: cleaning box assembly
Based on the steps 5-11, the rest polytetrafluoroethylene blanks are welded repeatedly in the same way, and a clean box body is prepared;
Step 13: quality inspection
The cleaning box body in the step 12 is selected, purified water is injected into the cleaning box body, and the tightness of the detector is detected.
Further, in step 6, the bonding wire material is made of polytetrafluoroethylene.
Further, in step 6, the size range of the wire bonding material is 4mm to 10mm.
Further, in step 8, the high temperature range is 365 ℃ to 375 ℃.
Further, in step 9, the welding temperature ranges from 345 ℃ to 350 ℃.
Further, in step 8, the high temperature constant temperature continuous sweeping time ranges from 5min to 10min.
Further, in step 9, the constant temperature continuous sweeping time range of the welding temperature is 30 min-100 min.
Further, in step 10, the slow speed range is 10 ℃/min to 15 ℃/min.
Further, in step 11, the rapid speed range is 20 ℃/min to 30 ℃/min.
Further, in the step 7, the speed range of the equilibrium temperature rise is 15 ℃/min to 20 ℃/min.
Advantageous effects
According to the invention, PTFE (polytetrafluoroethylene) materials are selected, and effective welding, stable welding and the like of PTFE can be realized through cutting, milling, welding technology and the like of multiple procedures. Solves the technical problems of difficult processing and welding, infirm welding, poor welding compatibility and the like of polytetrafluoroethylene. The welding surface of the polytetrafluoroethylene is enabled to present uniform tiny particles through rough grinding and accurate grinding of the welding part of the polytetrafluoroethylene, so that the uniform aggregation of heat and the uniform fusion welding are facilitated; the spray gun sweeping technology is adopted, so that large-scale welding can be realized, welding defects caused by unbalanced local heating and the like can be avoided; by adopting a matched process of balanced heating, high-temperature maintenance, cooling to a welding temperature and two-stage cooling, the quick filling can be realized by balanced heating and high-temperature melting, the solder and the blank are slowly contacted and fused by cooling welding, and the polytetrafluoroethylene is crystallized and polymerized again by two-stage cooling; the polytetrafluoroethylene welded by the process also has hydrophobic property, and the hydrophobic angle of 158 degrees can be realized. The cleaning box body has good sealing and containing capabilities.
Drawings
FIG. 1 is a schematic view of a polytetrafluoroethylene cleaning tank according to the present invention.
FIG. 2 is a process flow diagram of a polytetrafluoroethylene cleaning tank in accordance with the present invention.
Fig. 3 is an SEM image of a clean tank of polytetrafluoroethylene of the invention after refining.
FIG. 4 is a graph of temperature versus time for a polytetrafluoroethylene cleaning tank of the present invention having a 30 minute weld temperature duration.
FIG. 5 is a graph of temperature versus time for a polytetrafluoroethylene cleaning tank of the present invention having a 60 minute weld temperature duration.
FIG. 6 is an SEM image of the original polytetrafluoroethylene (A), polytetrafluoroethylene (B) at 30min welding temperature and polytetrafluoroethylene (C) at 60min welding temperature of a polytetrafluoroethylene cleaning tank of the present invention.
FIG. 7 is an SEM image of polytetrafluoroethylene at a weld of a polytetrafluoroethylene cleaning tank of the present invention at a weld temperature of 60 minutes.
FIG. 8 is a schematic drawing showing the contact angle of polytetrafluoroethylene at a weld of a polytetrafluoroethylene cleaning tank of the present invention at a weld temperature of 60 minutes.
Description of the drawings: 01. a lower box body; 02. an upper case; 03. a water inlet pipe; 04. and a water spraying pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the term "plurality" means two or more. "and/or": the association relationship describing the association object may represent that there are three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Referring to fig. 1-2, a method for preparing a polytetrafluoroethylene cleaning tank is disclosed, wherein the cleaning tank comprises a polytetrafluoroethylene upper tank 02, a polytetrafluoroethylene lower tank 01, a polytetrafluoroethylene water inlet pipe 03 and a polytetrafluoroethylene water spray pipe 04, the polytetrafluoroethylene upper tank 02 is welded on the polytetrafluoroethylene lower tank 01, the polytetrafluoroethylene water inlet pipe 03 is welded on the polytetrafluoroethylene lower tank 01, and the polytetrafluoroethylene water spray pipe 04 is welded on the polytetrafluoroethylene upper tank 02. The invention relates to a polytetrafluoroethylene welding technology, wherein the preparation method of the cleaning box body specifically comprises the following steps:
Step 1: embryo making
Selecting polytetrafluoroethylene plates and pipes, adopting a cutting machine tool to process the polytetrafluoroethylene plates and pipes into the specification sizes of an upper box body and a lower box body, and the specification sizes of a water inlet pipe and a water spray pipe, and processing corresponding polytetrafluoroethylene box body blanks and polytetrafluoroethylene pipe blanks;
Step 2: cleaning
Selecting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo in the step 1, putting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo into acetone cleaning liquid to clean organic matters such as surface oil stains, putting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo into absolute ethyl alcohol to clean the surface acetone, washing the ethanol on the surface of the polytetrafluoroethylene box body embryo with purified water, and naturally drying the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube after the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo are washed cleanly;
Step 3: polishing of welding part
Selecting the polytetrafluoroethylene box body material and polytetrafluoroethylene pipe material in the step 2, placing the polytetrafluoroethylene box body material and polytetrafluoroethylene pipe material on a grinding machine to be fixed, then starting a rough grinding head on the grinding machine to perform rough grinding on a welding position, processing a thin rough grinding layer on the welding position, then selecting a fine grinding head on the grinding machine to perform fine grinding and grinding on the rough grinding layer, processing a fine grinding layer, performing SEM (scanning electron microscope) scanning on the fine grinding layer, and observing the surface morphology of the fine grinding layer;
Step 4: cleaning of welded joints
Selecting the welding part in the step 3, washing and cleaning the welding part with acetone, absolute ethyl alcohol and purified water in sequence, and naturally drying after the washing and cleaning to prepare a welding blank;
Step 5: clamp splicing
Selecting the welding blanks in the step 4, placing the welding blanks on a welding machine tool, fixing the welding blanks by using a clamp, wherein the welding positions of the welding blanks are opposite, and the welding interval is set to be 5mm;
Step 6: placing solder
Selecting the welding blanks assembled in the step 5, selecting the welding wire materials made of polytetrafluoroethylene, selecting the size of the welding wire materials to be 7mm, and placing the welding wire materials on a welding interval and stabilizing the welding wire materials, thereby completing the placement of welding materials;
step 7: spray gun heating and sweeping
Selecting a welding blank with the welding flux placed in the step 6, heating and sweeping by adopting a heating spray gun on a machine table, wherein the spray gun is a spray gun which uniformly heats up at a speed of 17.5 ℃/min, and the welding blank with the welding flux placed is gradually heated and tends to be molten along with the uniform temperature rise of the spray gun, and the heating diameter of the spray gun is larger than the welding interval;
step 8: high temperature continuous sweeping
Based on the step 7, the spray gun continuously carries out balanced heating at the speed of 17.5 ℃/min, after the temperature is increased to 370 ℃, constant temperature continuous sweeping is carried out for 5min, and then the welding flux is melted into the welding space and the welding space is filled;
Step 9: welding temperature maintenance
Based on step 8, for a constant temperature environment of 370 ℃, rapidly cooling to a welding temperature at 20 ℃/min, setting the welding temperature to 350 ℃, continuously sweeping for 30min (embodiment one) or 60min (embodiment two) at a constant temperature of 350 ℃, and completing continuous melting of the solder into the welding space and filling the welding space;
Step 10: primary cooling
Selecting the welding flux and the welding blank filled with the welding space in the step 9, and putting the welding flux and the welding blank into a slow cooling chamber at the speed of 14.5 ℃/min for balanced cooling to 150 ℃;
Step 11: re-cooling
Selecting the welding flux and the welding blank filled with the welding space in the step 10, and putting the welding flux and the welding blank into a rapid cooling chamber at 25 ℃/min for uniform cooling to room temperature to prepare a welded polytetrafluoroethylene blank;
Step 12: cleaning box assembly
And (5) based on the steps 5-11, carrying out the same repeated welding on the rest polytetrafluoroethylene blanks to prepare the cleaning box body.
Fig. 3 is an SEM image of the refined polytetrafluoroethylene, and as can be seen from fig. 3, fine particles appear on the surface of the refined polytetrafluoroethylene, the surface is flat, the diameter of the fine particles is about 200nm, the arrangement is regular and uniform, and the fine particles are favorable for uniform heating and uniform fusion connection in the subsequent processing and welding.
Fig. 4 is a graph of temperature versus time for polytetrafluoroethylene having a 30min weld temperature duration, and in conjunction with fig. 6B, it can be seen that polytetrafluoroethylene has raised particles during welding and raised structures on the surface that facilitate the interconnection of polytetrafluoroethylene under conditions where the polytetrafluoroethylene may be melt welded.
Fig. 5 is a graph of temperature versus welding time for polytetrafluoroethylene having a welding temperature duration of 60 minutes, and in combination with fig. 6C, it can be seen that polytetrafluoroethylene may exhibit larger protruding particles during welding and raised structures on the surface, which may facilitate interconnection of polytetrafluoroethylene, increase the contact area for fusion with each other, and under such conditions, polytetrafluoroethylene may undergo fusion welding.
Fig. 6 is an SEM image of the original polytetrafluoroethylene (a) of the cleaning tank of polytetrafluoroethylene of the present invention, polytetrafluoroethylene (B) at a welding temperature of 30min (i.e., measured after processing and cooling to room temperature under this condition), and polytetrafluoroethylene (C) at a welding temperature of 60min (i.e., measured after processing and cooling to room temperature under this condition), it can be seen that the original polytetrafluoroethylene of fig. a has a flat surface without raised particles and raised structures, the polytetrafluoroethylene of fig. B has raised particles during welding and raised structures on the surface, increasing the surface area, these varying structures facilitate the interconnection of polytetrafluoroethylene, the polytetrafluoroethylene of fig. C has larger raised particles during welding, and raised structures on the surface, these varying structures facilitate the interconnection of polytetrafluoroethylene, increasing the contact area for fusion with each other.
Fig. 7 is an SEM image of the weld at a welding temperature of 60min of polytetrafluoroethylene, and it can be seen that almost seamless welding is achieved at the weld, and that the connecting lines at half the lateral direction of the SEM image are compatible, achieving a good welding effect.
Fig. 8 is a schematic diagram of the contact angle of the polytetrafluoroethylene at the welding temperature of 60min, and it can be seen that the weld processed by the process has hydrophobic property, is more beneficial to the application of cleaning the box body, and has a test contact angle of 158 °.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The preparation method of the polytetrafluoroethylene cleaning box body comprises a polytetrafluoroethylene box body and polytetrafluoroethylene tubes, wherein the polytetrafluoroethylene tubes are arranged on the polytetrafluoroethylene box body, and the preparation method of the cleaning box body comprises the following steps:
Step 1: embryo making
Selecting polytetrafluoroethylene plates and pipes, adopting a cutting machine tool to process the polytetrafluoroethylene plates and pipes into specification and size, and processing corresponding polytetrafluoroethylene box blanks and polytetrafluoroethylene pipe blanks;
Step 2: cleaning
Selecting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo in the step 1, putting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo into acetone cleaning liquid to clean organic matters such as surface oil stains, putting the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo into absolute ethyl alcohol to clean the surface acetone, washing the ethanol on the surface of the polytetrafluoroethylene box body embryo with purified water, and naturally drying the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube after the polytetrafluoroethylene box body embryo and the polytetrafluoroethylene tube embryo are washed cleanly;
Step 3: polishing of welding part
Selecting the polytetrafluoroethylene box body material and polytetrafluoroethylene pipe material in the step 2, placing the polytetrafluoroethylene box body material and polytetrafluoroethylene pipe material on a grinding machine to be fixed, then starting a rough grinding head on the grinding machine to perform rough grinding on a welding position, processing a thin rough grinding layer on the welding position, and then selecting a fine grinding head on the grinding machine to perform fine grinding and grinding on the rough grinding layer to process a fine grinding layer;
Step 4: cleaning of welded joints
Selecting the welding part in the step 3, washing and cleaning the welding part with acetone, absolute ethyl alcohol and purified water in sequence, and naturally drying after the washing and cleaning to prepare a welding blank;
Step 5: clamp splicing
Selecting the welding blanks in the step 4, placing the welding blanks on a welding machine tool, fixing the welding blanks by using a clamp, wherein the welding positions of the welding blanks are opposite, and the welding interval is set to be 3-8 mm;
Step 6: placing solder
Selecting the welding blanks assembled in the step 5, selecting welding wire materials, wherein the size of the welding wire materials is larger than 1 time of the welding interval and smaller than 1.5 times of the welding interval, and placing the welding wire materials on the welding interval and stabilizing the welding wire materials, so that the placement of welding materials is completed;
step 7: spray gun heating and sweeping
Selecting a welding blank with the welding flux placed in the step 6, and heating and sweeping by adopting a heating spray gun on a machine table, wherein the spray gun is a spray gun with balanced temperature rise, the welding blank with the welding flux placed is gradually heated along with the balanced temperature rise of the spray gun, and the heating diameter of the spray gun is larger than the welding interval;
step 8: high temperature continuous sweeping
Based on the step 7, continuously and uniformly heating the spray gun, raising the temperature to be higher than the melting point temperature of polytetrafluoroethylene, reaching a high temperature, continuously sweeping at a high temperature for a period of time, and then completing the melting of the solder into a welding space and filling the welding space;
Step 9: welding temperature maintenance
Based on the step 8, for the high temperature and constant temperature environment, rapidly cooling to a welding temperature which is slightly higher than the melting point temperature of polytetrafluoroethylene, continuously sweeping the welding temperature for a period of time at constant temperature, and then continuously melting the solder into the welding space and filling the welding space;
Step 10: primary cooling
Selecting the welding flux and the welding blanks filled with the welding space in the step 9, and putting the welding flux and the welding blanks into a slow cooling chamber for balanced cooling to an intermediate temperature, wherein the intermediate temperature is 120-160 ℃;
Step 11: re-cooling
Selecting the welding flux and the welding blanks filled with the welding space in the step 10, and placing the welding flux and the welding blanks in a rapid cooling chamber for uniform cooling to room temperature to prepare a welded polytetrafluoroethylene blank;
Step 12: cleaning box assembly
And (5) based on the steps 5-11, carrying out the same repeated welding on the rest polytetrafluoroethylene blanks to prepare the cleaning box body.
2. The method according to claim 1, wherein in step 6, the bonding material is selected from polytetrafluoroethylene.
3. The method of claim 2, wherein in step 6, the size of the wire bonding material is in the range of 4mm to 10mm.
4. The method of claim 1, wherein in step 8, the high temperature is 365-375 ℃.
5. The method of claim 1, wherein in step 9, the welding temperature is in a range of 345 ℃ to 350 ℃.
6. The method of claim 4, wherein in step 8, the high temperature constant temperature continuous sweeping time is in a range of 5min to 10min.
7. The method of claim 5, wherein in step 9, the welding temperature is constant for a duration ranging from 30min to 100min.
8. The method of claim 1, wherein in step 10, the slow speed is in the range of 10 ℃/min to 15 ℃/min.
9. The method of claim 1, wherein in step 11, the rapid speed is in the range of 20 ℃/min to 30 ℃/min.
10. The method for preparing a polytetrafluoroethylene cleaning tank according to claim 1, wherein in step 7, the speed of the equilibrium temperature rise is 15 ℃/min to 20 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311773359.8A CN118107180A (en) | 2023-12-21 | 2023-12-21 | Preparation method of polytetrafluoroethylene cleaning box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311773359.8A CN118107180A (en) | 2023-12-21 | 2023-12-21 | Preparation method of polytetrafluoroethylene cleaning box |
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| CN118107180A true CN118107180A (en) | 2024-05-31 |
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|---|---|---|---|
| CN202311773359.8A Pending CN118107180A (en) | 2023-12-21 | 2023-12-21 | Preparation method of polytetrafluoroethylene cleaning box |
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| Country | Link |
|---|---|
| CN (1) | CN118107180A (en) |
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2023
- 2023-12-21 CN CN202311773359.8A patent/CN118107180A/en active Pending
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