CN101513632A - Method for coating Teflon on metal sheet - Google Patents
Method for coating Teflon on metal sheet Download PDFInfo
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- CN101513632A CN101513632A CNA2009101053791A CN200910105379A CN101513632A CN 101513632 A CN101513632 A CN 101513632A CN A2009101053791 A CNA2009101053791 A CN A2009101053791A CN 200910105379 A CN200910105379 A CN 200910105379A CN 101513632 A CN101513632 A CN 101513632A
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Abstract
The present invention provides a method for coating Teflon on metal sheet, wherein the method comprises the following steps: a preprocessing step for processing the surface of metal sheet; a powder coating step for coating nickel on the surface of metal sheet; and a Teflon step for coating the Teflon on the surface of metal sheet after the power coating step. The method of the invention has the advantage that the elaborate Teflon on the small-size thin metal sheet can be realized. The problem of suitability of elaborate technical processing and technique of Teflon of thin iron sheet for the printing and using of SMT iron mesh is further settled. The uniformity and consistency of surface coating of thin metal sheet are excellent. The color also represents consistency. Furthermore the adhesion of surface coating of thin metal sheet is strong. The strength of thin metal sheet on the non-planar or large-area positions of thin opening or arris is high. Furthermore the method of the invention has excellent effect for the technical control for controlling the hardness of iron sheet. The thin metal sheet does not deform and is not damaged or broken in the whole technical flow of manufacturing.
Description
Technical field
The present invention relates to a kind of method of coating Teflon on metal sheet, relate in particular to a kind of method foil coating Teflon.
Background technology
Surface mounting technology (Surfacd Mounting Technolegy, be called for short SMT) be electronics package technique of new generation, it is collapsed into volume with traditional electronic devices and components and has only 1/tens device, thereby has realized the high density of electronic product assembling, highly reliable, miniaturization, low cost.
Teflon is to be the fluorine coating of matrix resin with the polytetrafluoroethylene, and English name is Teflon, because the cause of pronunciation is referred to as Teflon, the rich dragon of iron, Teflon, teflon or the like usually again.Teflon is a kind of high-performance coating, combines hear resistance, chemical inertness and excellent insulation stability and low frictional properties, has the comprehensive advantage that other coating can't contend with.General Teflon parts PROCESS FOR TREATMENT then lays particular emphasis on the lubricity and the wearability of surface of the work.
Carry out the fluorine dragon at the SMT steel mesh and handle, can bring following advantage:
(1) more favourable minimizing scraper does not promptly need to apply too big random cutter pressure at the resistance on steel disc surface, therefore not fragile steel disc surface; (2) be more conducive to the demoulding of tin cream; (3) need the non-printing surface of wiping steel disc in use hardly, improved the steel mesh print speed printing speed for this reason greatly, save the artificial and wiping cost of wiping steel mesh.
General Teflon parts PROCESS FOR TREATMENT then lay particular emphasis on the lubricity and the wearability of surface of the work, and being stained with property is not less demanding to it.Improve its not being stained with property, will further improve the fine and closely woven degree of its teflon layer.Openings of sizes when controlling print solder paste, the printing of SMT steel mesh need be controlled at 0.005mm and following, the most of position of its surperficial teflon layer be even.But on undersized foil, when especially plating Teflon on the SMT steel mesh, because the volume of its sheet metal itself is less, and shape is comparatively complicated, and traditional like this Teflon technology realizes comparatively meticulous processing to it.Therefore, coating Teflon on the SMT steel mesh is difficult to reach the effect of better not viscosity and lubricity.
Adopt Teflon technology to sheet metal, especially the SMT steel mesh is realized comparatively meticulous processing, and the control of its technological process it should be noted that following problem: the uniformity and the uniformity of (1) stalloy overlay coating, and this also shows on the consistency of colour; (2) strong adhesive force of the overlay coating of foil shows the intensity of non-planar or large tracts of land shape position such as thin perforate or arris especially; (3) the Teflon operational characteristic of foil overlay coating manifests the technology controlling and process that keeps with steel disc hardness; (4) integrality of foil in whole manufacture craft flow process keeps, and be indeformable, not impaired, do not give a discount etc.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method that can be implemented in coating Teflon meticulous on the small scale metal sheet.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of coating Teflon on metal sheet is characterized in that, comprises the steps:
Pre-treatment step: preliminary treatment is carried out on the surface of sheet metal;
Loose and plate step: at the plating nickel on surface of described sheet metal;
Teflon step: Teflon is coated with the surface that is plated to through described diffusing plating step sheet metal.
Adopt technique scheme, because described diffusing plating step is in the nickel plating in advance of the surface of steel disc, on the one hand for making this sheet metal have better hardness and scratch resistance, the top layer of nickel plating also more utilizes the absorption of fluorine material on the other hand.Most of position of its teflon layer be even.Wherein, sheet metal is stainless steel substrates especially, reason owing to technology and standing time, can be formed with one deck passivating film on its surface, adopt the method for common surface preparation to carry out the preceding processing of Teflon step, the coat binding strength that forms can be very poor, is difficult to guarantee adhesion, the quality of the coating Teflon that the employing technique scheme also further improves.
Furthermore, described diffusing plating step comprises: described sheet metal is positioned in the nickel plating electroplate liquid that includes nickel salt and acid; Anode is the nickel plate, and negative electrode is described sheet metal, and described sheet metal is carried out electronickelling.
Preferably, described diffusing plating step is under 5 to 6 amperes/square decimeter the condition, to continue 5 to 10 minutes in the current density of electroplating; Described nickel plating electroplate liquid comprises: 35% hydrochloric acid of the nickel chloride of 200g/L and 350ml/L.
Adopt technique scheme, show that through test after described diffusing plating step was finished, the bottom crystallization of sheet metal was more careful, soft, help forming good bonding force with Teflon.
Furthermore, the method for described coating Teflon on metal sheet also comprises: water-washing step: water is to cleaning through the sheet metal after described pre-treatment step, loose plating step or the Teflon step.
Wash processing quality guarantee that the possibility of finishing with technology is also extremely important, need a large amount of water do flushing and cleaning, but water can be recycled among the present invention.
Furthermore, behind the described water-washing step, dry up the moisture on described sheet metal surface.
Washing can bring water stain, water stainly tends to have dirt particle, and its surface that invests sheet metal for a long time can influence the cleanliness factor and the glossiness of sheet metal.Therefore, adopt the method that dries up will make the moisture on sheet metal surface evaporate rapidly, minimizing moisture is residual the steel disc surface, further improves the quality.
Furthermore, the thickness of described sheet metal is 0.05 millimeter to 0.15 millimeter.
The sheet metal that the present invention is alleged refers in particular to the SMT steel mesh, and generally speaking, the thickness of SMT steel mesh is 0.05 millimeter to 0.15 millimeter.
Furthermore, described sheet metal employing thickness is 0.10 millimeter No. 304 stainless steel substrates.
Described diffusing plating step can obviously strengthen the case hardness of stainless steel substrates.
Furthermore, described pre-treatment step comprises:
The decontamination step: described sheet metal soaked 10 minutes under 8% sig water normal temperature, or soaked 8-10 minute under 5% dilute sulfuric acid solution normal temperature;
Activation step: under the normal temperature condition, in the activated solution that comprises 50% hydrochloric acid and 20% sulfuric acid, soaked 8 minutes.
Adopt technique scheme, at first can remove the dirt on sheet metal surface, and top layer that can activator metal sheet, especially steel disc, ready for next step plating step of loosing, " participate in layer " so that produce the stronger chemical reaction of adhesive force.
Furthermore, described Teflon step continues 30 to 40 minutes down at 90 degrees centigrade.
Wherein, the thickness positive correlation of the time of described Teflon step and teflon layer is promptly owing to adopt technique scheme, the controllable thickness of teflon layer.The fluorine material is also not only on the surface of sheet metal, and existing a large amount of fluorine material has infiltrated sheet metal surface nickel dam.The Teflon molecular material can be separated out jointly with the nickel metal in its plating bath, obtains harder, more wear-resistant, as to have more lubricity plyability Teflon coating, and this coating is also finer and closely woven.In concrete experiment, the steel disc surface of using the sander polishing to adopt method of the present invention to handle can not be bonded in grenadine on the steel disc, very easily off-grid.Because the Teflon coating of the steel disc that employing method of the present invention is handled is finer and closely woven, has therefore shown extremely strong not viscosity and lubricity in experiment.
Compared with prior art the invention has the advantages that, can be implemented in coating Teflon meticulous on the small scale metal sheet, further solved the difficult problem of the processing of Teflon hand work and the printing use that technology is suitable for the SMT steel mesh of steel thin slice.Uniformity and uniformity at the foil overlay coating are fine, and its color also shows uniformity; And the strong adhesive force of the overlay coating of foil is strong, especially at the intensity height of non-planar or large tracts of land shape position such as thin perforate or arris; And method of the present invention also has good effect to the technology controlling and process that steel disc hardness keeps, and is indeformable in whole manufacture craft flow process, not impaired at foil, do not give a discount.
Description of drawings
Fig. 1 is the structural representation of the method embodiment of coating Teflon on metal sheet of the present invention;
Fig. 2 is the structural representation of sheet metal embodiment of the present invention;
Fig. 3 is the cross section micro-structure diagram of embodiment that adopts the handled sheet metal of method of coating Teflon on metal sheet of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment u of the present invention is described further.
As shown in Figure 1, a kind of embodiment technological process of method of coating Teflon on metal sheet.The sheet metal that present embodiment is selected for use is: No. 304 stainless steel substrates that thickness is 0.10 millimeter.
The technological process of the method for coating Teflon on metal sheet is as follows:
At first be pre-treatment step, comprise successively:
Decontamination step: adopt under the 8% sig water normal temperature and soaked 10 minutes, or use under the 5% dilute sulfuric acid solution normal temperature and soaked 8 to 10 minutes.Pass through water-washing step then, further sheet metal is cleaned,, prick the greasy dirt of steel disc generation etc. as heat, need to keep the cleaning on steel disc surface, use in order to subsequent processing to remove the dirt on sheet metal surface.
Activation step: described metal is in the activated solution that comprises 50% hydrochloric acid and 20% sulfuric acid, and normal temperature soaked 8 minutes down.With the top layer of activator metal sheet, ready for the nickel plating of next flow process, be more conducive to produce the stronger chemical reaction of adhesive force and " participate in layer ".
The process water-washing step carries out after further sheet metal being cleaned then
The plating step of loosing: described sheet metal is positioned in the nickel plating electroplate liquid of 35% hydrochloric acid of the nickel chloride that comprises 200g/L and 350ml/L, anode is the nickel plate, negative electrode is described sheet metal, be under 5 to 6 amperes/square decimeter the condition in current density, continue 5 to 10 minutes, described sheet metal is carried out electronickelling.The bottom crystallization of sheet metal was careful, soft after the plating step of loosing was finished.Help forming good bonding force with coating in back technology.
The process water-washing step carries out after further sheet metal being cleaned then
Teflon step: continue 30 to 40 minutes 90 degrees centigrade of following its times, the characteristic of Teflon is transferred to the surface of sheet metal.The thickness positive correlation on the time of its plating and Teflon top layer.
Carry out water-washing step then to after further sheet metal being cleaned, dry up the moisture on described sheet metal surface again.Certainly behind above-mentioned each water-washing step, can dry up step.
In addition, water-washing step all cleans with clear water or pure water, need a large amount of water do flushing and cleaning, but embodiment can recycle water.
The structural representation of sheet metal embodiment of the present invention as shown in Figure 2, described sheet metal is the SMT steel mesh, has different thin sheet net-like structures.
As shown in Figure 3, the cross section micro-structure diagram of the embodiment of the handled sheet metal of method of employing coating Teflon on metal sheet of the present invention.Its upper strata is a teflon layer, and the fluorine material also not only is incorporated into the surface of described sheet metal, and existing a large amount of fluorine material has infiltrated surperficial nickel dam.The Teflon molecular material is separated out jointly with the nickel metal in plating bath, obtains harder, more wear-resistant, as to have more lubricity plyability coating.It has following characteristic:
(1) coating is very uniform, and thickness can be controlled, and coating is very even, almost can reach the effect of profiling.(2) can do the Teflon PROCESS FOR TREATMENT to Any shape sheet metal workpiece.(3) teflon layer is an amorphous state, and its surface is without any the crystal gap, pore-free, and corrosion resistance is good, has remarkable corrosion stability.(4) adhesion of teflon layer will generally be higher than electrodeposited coating.(5) most of additive that uses food-grade does not use such as harmful substances such as cyanides, with respect to more environmental protection of general plating.(6) its hardness is HV350-450, HV600 after the heat treatment ± 50.(7) its sliding spy is excellent.(8) its wear rate is better than 2 times in compound nickel (coefficient is 0.2).(9) demoulding is good, does not need to use remover.
The site area of its enforcement of method of the present invention requires: the simple and easy factory building of open type, or Standard Factory Room need enough ventilated environments.Area is not less than 200 square meters or bigger.Be strip or square as far as possible.Between one of needs are independently checked, are detected.Need set up a sewage purifier, and have automatic equipment, realize all water for cleaning cycling and reutilizations.Electric power need for three-phase 20KW and more than, except that being used for the consumption of electroplating technology flow process, sewage purification and recirculation also occupy bigger ratio.The hydromining running water, can supply with each coating bath and and service sink (groove), can form mobile flushing and clean the processing.
The general budget of its project is: nickel plate, nickelous sulfate need ten thousand yuan of 4-5; Nickel bath, Teflon groove need 2000 yuan; Filter needs 3000 yuan; Pipeline, heating rod need 2000 yuan; Add up to 5.7 ten thousand.Whole implementation always drops into: except that the factory building input, the initial stage of hardware aspect drops into and estimates 12-15 ten thousand RMB.Other item: because water for cleaning is realized cycling and reutilization, the examining to compare of environmental protection aspect easily passes, but implementation of processes whether can be in the location must may not examining by relevant departments in carrying out.The nickel plate belongs to Rare Metals Materials, and buying also must obtain the buying permission of relevant departments.In addition, nickel plating and Teflon technology all belong to accuracy electroplate technology category, the manufacture craft that reaches enabled production generally all needs through long and time-consuming process debugging, and the stable of processing quality depends on the grasp of technological level and the persevering analysis to process materials, plating bath, detection and additional.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1, a kind of method of coating Teflon on metal sheet is characterized in that, comprises the steps:
Pre-treatment step: preliminary treatment is carried out on the surface of sheet metal;
Loose and plate step: at the plating nickel on surface of described sheet metal;
Teflon step: Teflon is coated with the surface that is plated to through described diffusing plating step sheet metal.
2, the method for coating Teflon on metal sheet as claimed in claim 1 is characterized in that, described diffusing plating step comprises: described sheet metal is positioned in the nickel plating electroplate liquid that includes nickel salt and acid; Anode is the nickel plate, and negative electrode is described sheet metal, and described sheet metal is carried out electronickelling.
3, the method for coating Teflon on metal sheet as claimed in claim 2 is characterized in that, described diffusing plating step is under 5 to 6 amperes/square decimeter the condition, to continue 5 to 10 minutes in the current density of electroplating; Described nickel plating electroplate liquid comprises: 35% hydrochloric acid of the nickel chloride of 200g/L and 350ml/L.
4, as the method for claim 1,2 or 3 described coating Teflon on metal sheet, it is characterized in that, also comprise: water-washing step: water is to cleaning through the sheet metal after described pre-treatment step, loose plating step or the Teflon step.
5, the method for coating Teflon on metal sheet as claimed in claim 4 is characterized in that, behind the described water-washing step, dries up the moisture on described sheet metal surface.
As the method for claim 1,2 or 3 described coating Teflon on metal sheet, it is characterized in that 6, the thickness of described sheet metal is 0.05 millimeter to 0.15 millimeter.
7, the method for coating Teflon on metal sheet as claimed in claim 6 is characterized in that, described sheet metal employing thickness is 0.10 millimeter No. 304 stainless steel substrates.
As the method for claim 1,2 or 3 described coating Teflon on metal sheet, it is characterized in that 8, described pre-treatment step comprises:
The decontamination step: described sheet metal soaked 10 minutes under 8% sig water normal temperature, or soaked 8 to 10 minutes under 5% dilute sulfuric acid solution normal temperature;
Activation step: described metal is in the activated solution that comprises 50% hydrochloric acid and 20% sulfuric acid, and normal temperature soaked 8 minutes down.
As the method for claim 1,2 or 3 described coating Teflon on metal sheet, it is characterized in that 9, described Teflon step continues 30 to 40 minutes down at 90 degrees centigrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101053791A CN101513632A (en) | 2009-02-17 | 2009-02-17 | Method for coating Teflon on metal sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101053791A CN101513632A (en) | 2009-02-17 | 2009-02-17 | Method for coating Teflon on metal sheet |
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| CN101513632A true CN101513632A (en) | 2009-08-26 |
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| CNA2009101053791A Pending CN101513632A (en) | 2009-02-17 | 2009-02-17 | Method for coating Teflon on metal sheet |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157592A (en) * | 2011-01-06 | 2011-08-17 | 上海晶澳太阳能科技有限公司 | Internal wire for solar module and processing technique thereof |
| CN103272751A (en) * | 2013-06-20 | 2013-09-04 | 陈自力 | Surface treatment method for stainless steel cutter |
| CN104818502A (en) * | 2015-04-27 | 2015-08-05 | 模德模具(东莞)有限公司 | Production process of production device applying nickel-Teflon coating |
| CN104818501A (en) * | 2015-04-27 | 2015-08-05 | 模德模具(东莞)有限公司 | Nickel-Teflon coating machining process applied to screws and nuts |
| CN107164790A (en) * | 2017-06-01 | 2017-09-15 | 广东贝贝机器人有限公司 | A kind of anti-clogging processing method of dispensing needle head |
| CN116273781A (en) * | 2023-03-07 | 2023-06-23 | 深圳市鸿焺精工有限公司 | Nickel-teflon coating and preparation method thereof |
-
2009
- 2009-02-17 CN CNA2009101053791A patent/CN101513632A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157592A (en) * | 2011-01-06 | 2011-08-17 | 上海晶澳太阳能科技有限公司 | Internal wire for solar module and processing technique thereof |
| CN103272751A (en) * | 2013-06-20 | 2013-09-04 | 陈自力 | Surface treatment method for stainless steel cutter |
| CN103272751B (en) * | 2013-06-20 | 2015-02-18 | 陈自力 | Surface treatment method for stainless steel cutter |
| CN104818502A (en) * | 2015-04-27 | 2015-08-05 | 模德模具(东莞)有限公司 | Production process of production device applying nickel-Teflon coating |
| CN104818501A (en) * | 2015-04-27 | 2015-08-05 | 模德模具(东莞)有限公司 | Nickel-Teflon coating machining process applied to screws and nuts |
| CN107164790A (en) * | 2017-06-01 | 2017-09-15 | 广东贝贝机器人有限公司 | A kind of anti-clogging processing method of dispensing needle head |
| CN116273781A (en) * | 2023-03-07 | 2023-06-23 | 深圳市鸿焺精工有限公司 | Nickel-teflon coating and preparation method thereof |
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Open date: 20090826 |