CN109913101B - Method for preparing splash-proof film on surface of welded part - Google Patents
Method for preparing splash-proof film on surface of welded part Download PDFInfo
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- CN109913101B CN109913101B CN201711330616.5A CN201711330616A CN109913101B CN 109913101 B CN109913101 B CN 109913101B CN 201711330616 A CN201711330616 A CN 201711330616A CN 109913101 B CN109913101 B CN 109913101B
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Abstract
The invention provides a method for preparing an anti-splash film on the surface of a welding part, which comprises the following steps of firstly preparing an anti-splash mixed solution; cleaning up floating dust impurities on the surface of the welding part and keeping the surface dry, then heating the surface of the welding part, coating an isolation solution on the surface of the welding part, and forming an isolation layer after the isolation solution is dried; then carrying out corona treatment on the isolation layer; then coating the splash-proof mixed solution on the surface of the isolation layer, and forming a splash-proof film after the mixed solution is dried; and finally, irradiating the splash-proof film by using an ultraviolet lamp. The splash-proof film formed by the method has the advantages of high film forming speed, good quality, high viscosity, easiness in stripping, no damage to the surface of a welded part, capability of effectively avoiding slag generated in welding and improvement on welding quality, and residues are not easy to generate in the stripping process.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a method for preparing a splash-proof film on the surface of a welded part.
Background
The carbon dioxide gas shielded welding is a common welding method for ferrous metal at present, and has the advantages of low welding cost, high efficiency, simple and convenient operation, high crack resistance of a welding line, small deformation after welding and the like; however, the MIG welding has a drawback that much spatter is generated.
Excessive welding spatters not only reduce welding efficiency, but also influence weldment appearance quality, therefore, in practical production application, people often adopt the welding splashproof agent for the slag that the welding produced is easily cleared up, has reduced processes such as shovel, mill after the welding, has improved the appearance quality of weldment. The splash-proof film formed on the surface of the welding part by the existing water-based welding splash-proof agent is poor in quality and not easy to peel, and residues are often left on the surface of the welding part.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for preparing a splash-proof film on the surface of a welded part, which improves the quality of the splash-proof film formed on the surface of the welded part and simultaneously ensures that the formed splash-proof film is easy to peel.
The invention provides a method for preparing a splash-proof film on the surface of a welded part, which comprises the following steps:
step S01, preparing an anti-splash mixed solution;
s001, weighing 10-30 parts of polyester acrylic resin and 5-15 parts of butyl rubber according to the mass ratio, adding the polyester acrylic resin and the 5-15 parts of butyl rubber into a blending kettle with a stirring device, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, and stirring for 10-20min at a temperature of 80-100 ℃;
s002, adding 10-15 parts of olefin polymer and 5-10 parts of hydrogenated petroleum resin into a blending kettle, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, stirring for 20min, and cooling to room temperature to obtain an anti-splash mixed solution;
s02, cleaning floating dust and impurities on the surface of the welded part, keeping the surface dry, and heating the surface of the welded part to 50-100 ℃;
step S03, coating an isolation solution on the surface of the welding part, and forming an isolation layer after the isolation solution is dried;
step S04, carrying out corona treatment on the isolation layer, wherein the running speed is 30m/min, the corona power is 500w, and the corona voltage is 2kV;
step S05, coating the splash-proof mixed solution prepared in the step S01 on the surface of the isolation layer, and forming a splash-proof film after the mixed solution is dried;
and step S06, carrying out ultraviolet lamp irradiation on the splash-proof film, wherein the irradiation time of the ultraviolet lamp is 5-10min, and the wavelength of the ultraviolet light is 250-400 nm.
Preferably, the olefin polymer in step S002 is an olefin copolymer of two or more of ethylene, propylene or butene.
Preferably, the weldment coated with the isolation solution is transferred to a vacuum drying oven, and dried for 20-40min while maintaining the drying temperature at 80 ℃.
Preferably, the isolation solution comprises the following components in parts by weight: 30-50 parts of fluorine-containing resin, 15-20 parts of nitric acid, 10-15 parts of a hardening agent, 5-10 parts of a cross-linking agent and 5-10 parts of a catalyst.
Preferably, the isolation solution comprises the following components in parts by weight: 50 parts of fluorine-containing resin, 20 parts of nitric acid, 10 parts of a hardening agent, 10 parts of a cross-linking agent and 10 parts of a catalyst.
Preferably, the fluororesin has a viscosity ranging from 1000mpa.s to 5000mpa.s and a hydroxyl value of 80mg KOH to 100mg KOH per gram of the fluororesin.
Preferably, the preparation method of the isolation solution comprises the following steps:
(a) weighing 30-50 parts of fluorine-containing resin and 15-20 parts of nitric acid according to the mass ratio, adding into a blending kettle with a stirring device, and stirring for 20-30min at 20-50 ℃;
(b) adding 10-15 parts of hardening agent, 5-10 parts of cross-linking agent and 5-10 parts of catalyst into the blending kettle in the step (a), adding the mixture, keeping the temperature, stirring for 10-30min, and uniformly mixing;
(c) then cooled to room temperature to obtain the isolation solution.
Preferably, the hardener is an isocyanate compound or an amine-based compound.
The invention has the beneficial effects that:
1. the splash-proof mixed solution prepared by the invention is compounded by adopting the polyester acrylic resin and the butyl rubber, and is supplemented with the olefin polymer, the molecular polarity in the obtained mixed solution is large, the adhesion is strong, and the mechanical strength of the splash-proof film is enhanced;
2. by introducing the hydrogenated petroleum resin, the mechanical property is improved, the binding force is ensured while the splash-proof film is formed, and the flexibility of the splash-proof film is improved, so that the splash-proof film is not easy to tear;
3. according to the invention, the isolation layer is formed on the surface of the welding part at first, so that residues left by the splash-proof film during tearing at the later stage are reduced, and the splash-proof film can be better attached to the isolation layer by performing corona treatment on the isolation layer;
4. the isolation solution is obtained by mixing the fluorine-containing resin, the nitric acid, the hardening agent, the cross-linking agent and the catalyst under a certain condition, so that the splash-proof film can be easily peeled off in the using process, the film uncovering operation is convenient, no residue is generated, the production efficiency is improved, the isolation solution is safe and environment-friendly, and the injury to operators is small;
5. according to the invention, the splash-proof film is irradiated by the ultraviolet lamp, so that the quality of the splash-proof film can be optimized, the structural strength of the splash-proof film is improved, and the film cracking phenomenon is prevented.
6. The splash-proof film formed by the method has the advantages of high film forming speed, good quality, high viscosity, easiness in stripping, no damage to the surface of a welded part, capability of effectively avoiding slag generated in welding and improvement on welding quality, and residues are not easy to generate in the stripping process.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example 1
The embodiment discloses a method for preparing a splash-proof film on the surface of a welded part, which comprises the following steps:
step S01, preparing an anti-splash mixed solution; the method specifically comprises the following steps:
s001, weighing 10 parts of polyester acrylic resin and 5 parts of butyl rubber according to the mass ratio, adding the polyester acrylic resin and the 5 parts of butyl rubber into a blending kettle with a stirring device, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, and stirring for 10-20min at a temperature of 80-100 ℃;
and S002, adding 10 parts of olefin polymer and 5 parts of hydrogenated petroleum resin into a blending kettle, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, stirring for 20min, and cooling to room temperature to obtain the splash-proof mixed solution. The olefin polymer in step S002 is an olefin copolymer of two or more of ethylene, propylene or butene.
In the step, polyester acrylic resin and butyl rubber are compounded and are supplemented with olefin polymer, the molecular polarity in the obtained mixed solution is large, the adhesion is strong, the mechanical strength of the splash-proof film is enhanced, the olefin polymer is added, the cohesive strength is improved, the adhesion strength is increased, the butyl rubber is added, the good cohesive action is realized, the service time and the effect are improved, and the aging decomposition is prevented; by introducing the hydrogenated petroleum resin, the mechanical property is improved, the binding force is ensured while the splash-proof film is formed, and the flexibility of the splash-proof film is improved, so that the splash-proof film is not easy to tear.
Step S02, cleaning floating dust and impurities on the surface of the welded piece, keeping the surface dry, and heating the surface of the welded piece to 50 ℃.
In this step, can guarantee the effective adhesion of later stage isolation layer through carrying out impurity clearance to welding part surface, can optimize the film forming quality of isolation layer and shorten the film forming time of isolation layer to its heating.
S03, coating an isolation solution on the surface of the welding part, forming an isolation layer after the isolation solution is dried, transferring the welding part coated with the isolation solution into a vacuum drying box, keeping the drying temperature at 80 ℃, and drying for 20 min; the isolation solution comprises the following components in parts by weight: 30 parts of fluorine-containing resin, 15 parts of nitric acid, 10 parts of a hardening agent, 5 parts of a cross-linking agent and 5 parts of a catalyst.
The isolation solution is obtained by mixing the fluorine-containing resin, the nitric acid, the hardening agent, the cross-linking agent and the catalyst under a certain condition, so that the splash-proof film can be easily peeled off in the using process, the film uncovering operation is convenient, no residue is generated, the production efficiency is improved, the isolation solution is safe and environment-friendly, and the injury to operators is small.
The viscosity of the fluorine-containing resin in the embodiment is 1000mpa.s to 5000mpa.s, the hydroxyl value of each gram of the fluorine-containing resin is 80mg KOH to 100mg KOH, the fluorine-containing resin enables the isolation film to have excellent mechanical strength, good adhesion to the base material, decomposition temperature higher than 300 ℃, good high-temperature stability and the like, and the defects of insufficient safety and the like can be avoided.
The hardener in this embodiment is an isocyanate compound or an amine compound. If the content of the hardening agent is too high, the adhesion of the hardened coating may be deteriorated. If the content of the hardening agent is too low, the structural strength of the hardened coating is low, and the phenomenon of film cracking is easily caused.
The preparation method of the isolation solution comprises the following steps:
(a) weighing 30 parts of fluorine-containing resin and 15 parts of nitric acid according to the mass ratio, adding into a blending kettle with a stirring device, and stirring for 20min at the temperature of 20 ℃;
(b) adding 10 parts of hardening agent, 5 parts of cross-linking agent and 5 parts of catalyst into the blending kettle in the step (a), adding, preserving heat, stirring for 10min, and uniformly mixing;
(c) then cooled to room temperature to obtain the isolation solution.
And S04, carrying out corona treatment on the isolation layer, wherein the running speed is 30m/min, the corona power is 500w, and the corona voltage is 2kV, and the corona treatment on the isolation layer can ensure that the splash-proof film can be well attached to the isolation layer, so that the splash-proof film is prevented from falling and deforming or displacing, and can be quickly torn and pulled when being peeled off, and is not easy to damage.
In the corona treatment, high-frequency and high-voltage electricity is applied to a treatment device to cause corona discharge, thereby generating fine and dense violet-blue sparks. Various plasmas generated after air ionization are accelerated to impact an isolation layer in a treatment device under the action of a strong electric field, and the energy of plasma particles is generally several to tens of electron volts and is close to the chemical bond energy of the isolation layer, so that the chemical bond on the surface of the isolation layer can be induced to break and degrade, and the surface roughness is increased.
And S05, coating the splash-proof mixed solution prepared in the step S01 on the surface of the isolation layer, and forming a splash-proof film after the mixed solution is dried.
And step S06, carrying out ultraviolet lamp irradiation on the splash-proof film, wherein the ultraviolet lamp irradiation time is 5min, and the wavelength of the ultraviolet light is 250 nm. The splash-proof film is irradiated by an ultraviolet lamp, so that the quality of the splash-proof film can be optimized, the structural strength of the splash-proof film is improved, and the film cracking phenomenon is prevented.
Example 2
The embodiment discloses a method for preparing a splash-proof film on the surface of a welded part, which comprises the following steps:
step S01, preparing an anti-splash mixed solution; the method specifically comprises the following steps:
s001, weighing 30 parts of polyester acrylic resin and 15 parts of butyl rubber according to the mass ratio, adding the polyester acrylic resin and the butyl rubber into a blending kettle with a stirring device, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, and stirring for 20min at 100 ℃;
and S002, adding 15 parts of olefin polymer and 10 parts of hydrogenated petroleum resin into a blending kettle, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, stirring for 20min, and cooling to room temperature to obtain the splash-proof mixed solution. The olefin polymer in step S002 is an olefin copolymer of two or more of ethylene, propylene or butene.
In the step, polyester acrylic resin and butyl rubber are compounded and are supplemented with olefin polymer, the molecular polarity in the obtained mixed solution is large, the adhesion is strong, the mechanical strength of the splash-proof film is enhanced, the olefin polymer is added, the cohesive strength is improved, the adhesion strength is increased, the butyl rubber is added, the good cohesive action is realized, the service time and the effect are improved, and the aging decomposition is prevented; by introducing the hydrogenated petroleum resin, the mechanical property is improved, the binding force is ensured while the splash-proof film is formed, and the flexibility of the splash-proof film is improved, so that the splash-proof film is not easy to tear.
Step S02, cleaning floating dust and impurities on the surface of the welded piece, keeping the surface dry, and then heating the surface of the welded piece to 100 ℃.
In this step, can guarantee the effective adhesion of later stage isolation layer through carrying out impurity clearance to welding part surface, can optimize the film forming quality of isolation layer and shorten the film forming time of isolation layer to its heating.
S03, coating an isolation solution on the surface of the welding part, forming an isolation layer after the isolation solution is dried, transferring the welding part coated with the isolation solution into a vacuum drying box, keeping the drying temperature at 80 ℃, and drying for 40 min; the isolation solution comprises the following components in parts by weight: 50 parts of fluorine-containing resin, 20 parts of nitric acid, 15 parts of a hardening agent, 10 parts of a cross-linking agent and 10 parts of a catalyst.
The isolation solution is obtained by mixing fluorine-containing resin, nitric acid, a hardening agent, a cross-linking agent and a catalyst under a certain condition, so that the splash-proof film can be easily peeled off in the using process, the film uncovering operation is convenient, no residue is generated, the production efficiency is improved, the isolation solution is safe and environment-friendly, and the injury to operators is small; the fluorine-containing resin in this embodiment has a viscosity ranging from 1000mpa.s to 5000mpa.s, a hydroxyl value of 80mg KOH to 100mg KOH per gram of the fluorine-containing resin, and the hardener is an isocyanate compound or an amine-based compound.
The preparation method of the isolation solution comprises the following steps:
(a) weighing 50 parts of fluorine-containing resin and 20 parts of nitric acid according to the mass ratio, adding into a blending kettle with a stirring device, and stirring for 30min at 50 ℃;
(b) adding 15 parts of hardening agent, 10 parts of cross-linking agent and 10 parts of catalyst into the blending kettle in the step (a), adding, preserving heat, stirring for 30min, and uniformly mixing;
(c) then cooled to room temperature to obtain the isolation solution.
And S04, carrying out corona treatment on the isolation layer, wherein the running speed is 30m/min, the corona power is 500w, and the corona voltage is 2kV, and the corona treatment on the isolation layer can ensure that the splash-proof film can be well attached to the isolation layer, so that the splash-proof film is prevented from falling and deforming or displacing, and can be quickly torn and pulled when being peeled off, and is not easy to damage.
And S05, coating the splash-proof mixed solution prepared in the step S01 on the surface of the isolation layer, and forming a splash-proof film after the mixed solution is dried.
And step S06, carrying out ultraviolet lamp irradiation on the splash-proof film, wherein the ultraviolet lamp irradiation time is 10min, and the wavelength of the ultraviolet light is 400 nm. The splash-proof film is irradiated by an ultraviolet lamp, so that the quality of the splash-proof film can be optimized, the structural strength of the splash-proof film is improved, and the film cracking phenomenon is prevented.
In conclusion, the splash-proof film formed by the method has the advantages of high film forming speed, good quality, high viscosity, easiness in stripping and no damage to the surface of a welding part, is not easy to generate residues during stripping, can effectively avoid slag generated during welding, and improves the welding quality.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A method for preparing a splash-proof film on the surface of a welded part is characterized by comprising the following steps:
step S01, preparing an anti-splash mixed solution;
s001, weighing 10-30 parts of polyester acrylic resin and 5-15 parts of butyl rubber according to the mass ratio, adding the polyester acrylic resin and the 5-15 parts of butyl rubber into a blending kettle with a stirring device, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, and stirring for 10-20min at a temperature of 80-100 ℃;
s002, adding 10-15 parts of olefin polymer and 5-10 parts of hydrogenated petroleum resin into a blending kettle, sealing the blending kettle, vacuumizing to a pressure of less than-0.05 Mpa, stirring for 20min, and cooling to room temperature to obtain an anti-splash mixed solution;
s02, cleaning floating dust and impurities on the surface of the welded part, keeping the surface dry, and heating the surface of the welded part to 50-100 ℃;
step S03, coating an isolation solution on the surface of the welding part, and forming an isolation layer after the isolation solution is dried; the isolation solution comprises the following components in parts by weight: 30-50 parts of fluorine-containing resin, 15-20 parts of nitric acid, 10-15 parts of a hardening agent, 5-10 parts of a cross-linking agent and 5-10 parts of a catalyst;
step S04, carrying out corona treatment on the isolation layer, wherein the running speed is 30m/min, the corona power is 500w, and the corona voltage is 2kV;
step S05, coating the splash-proof mixed solution prepared in the step S01 on the surface of the isolation layer, and forming a splash-proof film after the mixed solution is dried;
and step S06, carrying out ultraviolet lamp irradiation on the splash-proof film, wherein the irradiation time of the ultraviolet lamp is 5-10min, and the wavelength of the ultraviolet light is 250-400 nm.
2. The method of preparing splash proof membranes on the surfaces of weldments as claimed in claim 1, wherein the olefin polymer in step S002 is an olefin copolymer of two or more of ethylene, propylene or butylene.
3. The method for preparing a splash proof film on the surface of a welded piece according to claim 1, wherein in step S03, the welded piece coated with the isolation solution is transferred to a vacuum drying oven, and is dried for 20-40min at a drying temperature of 80 ℃.
4. The method for preparing the splash-proof film on the surface of the weldment according to claim 1, wherein the isolation solution comprises the following components in parts by weight: 50 parts of fluorine-containing resin, 20 parts of nitric acid, 10 parts of a hardening agent, 10 parts of a cross-linking agent and 10 parts of a catalyst.
5. The method for preparing an anti-splash film on the surface of a welded member as claimed in claim 4, wherein the fluorine-containing resin has a viscosity ranging from 1000mPa.S to 5000mPa.S, and a hydroxyl value per gram of the fluorine-containing resin is 80mg KOH to 100mg KOH.
6. The method for preparing the splash proof membrane on the surface of the weldment according to claim 4, wherein the preparation method of the isolation solution comprises the following steps:
(a) weighing 30-50 parts of fluorine-containing resin and 15-20 parts of nitric acid according to the mass ratio, adding into a blending kettle with a stirring device, and stirring for 20-30min at 20-50 ℃;
(b) adding 10-15 parts of hardening agent, 5-10 parts of cross-linking agent and 5-10 parts of catalyst into the blending kettle in the step (a), adding the mixture, keeping the temperature, stirring for 10-30min, and uniformly mixing;
(c) then cooled to room temperature to obtain the isolation solution.
7. The method for preparing an anti-splash film on the surface of a weldment according to claim 4, wherein the hardener is an isocyanate compound or an amine-based compound.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103265857A (en) * | 2013-05-07 | 2013-08-28 | 郭仰南 | Environmental protection type gas welding anti-splashing liquid |
| WO2014175196A1 (en) * | 2013-04-23 | 2014-10-30 | 太陽ホールディングス株式会社 | Solder-resist composition and printed circuit board using same |
| CN104710882A (en) * | 2015-03-05 | 2015-06-17 | 深圳市格莱特印刷材料有限公司 | Peelable blue glue and preparation method thereof |
| CN106995671A (en) * | 2017-04-23 | 2017-08-01 | 沈亚菊 | A kind of circuit board adhesive |
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2017
- 2017-12-13 CN CN201711330616.5A patent/CN109913101B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014175196A1 (en) * | 2013-04-23 | 2014-10-30 | 太陽ホールディングス株式会社 | Solder-resist composition and printed circuit board using same |
| CN103265857A (en) * | 2013-05-07 | 2013-08-28 | 郭仰南 | Environmental protection type gas welding anti-splashing liquid |
| CN104710882A (en) * | 2015-03-05 | 2015-06-17 | 深圳市格莱特印刷材料有限公司 | Peelable blue glue and preparation method thereof |
| CN106995671A (en) * | 2017-04-23 | 2017-08-01 | 沈亚菊 | A kind of circuit board adhesive |
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