CN104419929A - Etching method - Google Patents
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- CN104419929A CN104419929A CN201310377578.4A CN201310377578A CN104419929A CN 104419929 A CN104419929 A CN 104419929A CN 201310377578 A CN201310377578 A CN 201310377578A CN 104419929 A CN104419929 A CN 104419929A
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Abstract
The invention provides an etching method. The etching method includes the following steps: a corrosion-resistant glue is coated on a predetermined portion of the surface of a workpiece surface, and the workpiece surface coated with the corrosion-resistant glue is subjected to masking treatment; the workpiece after masking treatment is subjected to spray etching with a first etching liquid, to form an initial convex-concave structure on the surface of the workpiece; the etched workpiece is subjected to film removal treatment to remove a mask on the surface of the workpiece; the workpiece after film removal treatment is put into a second etching liquid and soaked to remove continuous edges of the initial convex-concave structure and diminish the etching depth of a to-be-formed micro-structure; the soaked workpiece is flushed with water, dried and then polished, so as to form the smooth-transition micro-structure on the surface of the workpiece. According to the etching method, the product having beautiful surface and having a good antiskid effect and a good clean-keeping effect is obtained.
Description
Technical field
The invention belongs to chemical milling manufacture field, specifically, the present invention relates to a kind of surface working at metallic substance such as die steel and form the engraving method that the section with certain side etching quantity is the array microstructure of the microflute of convex-concave shape.
Background technology
In mould and metal product manufacture field, go out in the surface working of mould or product the aesthetic property that micron-sized array type dimpling or dimple-structures can increase product, skidproof effect, and even effect etc. of keeping a public place clean.Compare with electro-chemical machining with the micro-Milling Machining of machinery, laser processing, electrospark machining, chemical method for etching because its working method is simple, rapid shaping is effective, significantly can reduce production cost, the advantage such as low for equipment requirements and be subject to widespread use.
Chemical milling ratio juris utilizes metal and etching reagent (pharmaceutical chemicals) to carry out chemical reaction form solvable object and remove reactive moieties, by controlling to wish to be removed part and the object of processing is assigned to reach in protected portion.Usually when carrying out the etching and processing of surface micro-structure to metals such as die steel, mask process to be carried out to metal material surfaces such as die steel, namely at work metal surface-coated one deck insulation paste, and the part of uncoated insulation paste is made to carry out chemical reaction with etching reagent and be removed.Adopt the figure processed in this way and often there is the shape that surface opening is large, internal opening is little, its section is as trapezoidal.For die steel, its surface in cage shape microgroove, it is bad that the consequence caused like this is that processing work touches up feel, also affects visual effect simultaneously.
Summary of the invention
In order to solve existing the problems referred to above existed in the art, the invention provides a kind of novel engraving method, that is, substantially process corresponding convex-concave structure by spraying first workpiece surface, then soaked by secondary and remove corner angle, thus obtain the curved-surface structure seamlessly transitted.
The invention provides a kind of engraving method, described engraving method comprises the steps: to apply corrosion-resistant glue on the predetermined portion on the surface of workpiece, carries out mask process to the described surface after the corrosion-resistant glue of the coating of workpiece; Spray etching is carried out to the first etching solution of the workpiece after mask process, to form initial concaveconvex structure on the described surface of work; Demoulding process is carried out, to remove the mask of workpiece surface to the workpiece after etching; Workpiece after demoulding process is put in the second etching solution and soaks, to remove the seamed edge of the initial convex-concave structure of continuous print and to reduce the etch depth of the microstructure that will be formed; By the workpiece use water rinsing, drying then polishing after immersion, thus form microstructure on the described surface of workpiece.
According to exemplary embodiment of the present invention, after the predetermined portion on the surface of workpiece applies corrosion-resistant glue, the operation that can the described surface of workpiece be performed oven dry, exposure, development and again be dried, thus the mask process realizing the described surface after to the corrosion-resistant glue of coating of work.According to a preferred embodiment of the invention, the time length of drying operation can be 3min-10min again.
According to exemplary embodiment of the present invention, the step that the predetermined portion on the surface of workpiece applies corrosion-resistant glue can comprise: the predetermined portion coating on the surface of workpiece has the corrosion-resistant glue of square shape, the surface of workpiece is made to have comprised the coating part of corrosion-resistant glue and the uncoated part of not coated corrosion-resistant glue coated, wherein, uncoated part corresponds to the concave structure that will be formed on the surface of workpiece between coating part adjacent one another are.According to a preferred embodiment of the invention, the coating part of workpiece surface can be array type, the thickness of each coating part can between 30 μm and 60 μm, each coating part can be the square block of the length of side between 400 μm and 500 μm, and the width in the gap between coating part adjacent one another are can between 120 μm and 200 μm.
According to exemplary embodiment of the present invention, the step of the workpiece after mask process being carried out to spray etching can comprise: the etching solution controlling to spray from the nozzle of etching machine is fan-shaped being uniformly distributed, and etches with the part of the uncoated corrosion-resistant glue to workpiece surface.
According to exemplary embodiment of the present invention, the step of the workpiece after mask process being carried out to spray etching can comprise: control etching solution and etch with the surface of the etching pressure reduced gradually to workpiece by predetermined time interval.According to a preferred embodiment of the invention, the initial spray pressure of etching solution in the scope of 1.6psi-1.8psi, can reduce 0.3psi-0.6psi, until spray pressure is adjusted to 0psi under 1min-2min makes spray pressure.
According to exemplary embodiment of the present invention, described first etching solution can be identical with described second etching solution.According to a preferred embodiment of the present invention, described first etching solution and described second etching solution all can be formulated by following component by weight: the iron trichloride of 15%-25%, and the hydrofluoric acid of 30%-50%, the phosphoric acid of 2%-5%, all the other are water.According to another preferred embodiment of the invention, described first etching solution and described second etching solution all can be formulated by following component by weight: the iron trichloride of 15%-25%, and the nitric acid of 20%-40%, the phosphoric acid of 2%-5%, all the other are water.
Accompanying drawing explanation
To those skilled in the art, describe example embodiment in detail by referring to accompanying drawing and above-mentioned and further feature of the present invention will be made to become clear, in the accompanying drawings:
Fig. 1 shows the schema according to engraving method of the present invention;
Fig. 2 schematically shows the orthographic plan being coated with the workpiece surface of corrosion-resistant glue according to one exemplary embodiment of the present invention;
Fig. 3 A is the schematic diagram of the etched workpiece surface schematically shown when adopting little pressure to spray in engraving method according to the present invention, and Fig. 3 B is the schematic diagram of the etched workpiece surface schematically shown when adopting large pressure to spray in engraving method according to the present invention;
Fig. 4 shows according to an exemplary embodiment of the present invention for carrying out the structural representation of the etching machine of spray etching;
Fig. 5 is the schematic diagram of workpiece before immersion after partially illustrating striping process according to an exemplary embodiment of the present invention;
Fig. 6 partially illustrates workpiece schematic diagram after immersion for a period of time according to an exemplary embodiment of the present invention;
Fig. 7 A shows the three-dimensional plot with the workpiece of microstructure obtained by engraving method of the present invention, and Fig. 7 B shows the sectional drawing with the workpiece of microstructure obtained by engraving method of the present invention.
Embodiment
Now, more fully example embodiment is described hereinafter with reference to accompanying drawing; But example embodiment can be implemented in different forms, and should not be construed as limited to the embodiment set forth here.Certainly, provide these embodiments to make the disclosure will be completely and thoroughly, and these embodiments will convey to those skilled in the art fully scope of the present invention.
The invention provides a kind of processing method utilizing simple processing units and condition, specifically, according to engraving method of the present invention, can form as the surface working of the metallic substance of workpiece the engraving method that the section with certain side etching quantity is the array microstructure of the microflute of convex-concave shape at die steel etc.In other words, according to engraving method of the present invention, substantially processing corresponding convex-concave structure by spraying first workpiece surface, then being soaked by secondary and removing corner angle, thus obtaining the curved-surface structure seamlessly transitted.
Describe in detail below with reference to accompanying drawings according to engraving method of the present invention.
Fig. 1 shows the schema according to engraving method of the present invention.
With reference to Fig. 1, engraving method according to the present invention comprises the following step sequentially performed: to workpiece (such as, metal works) surface carry out mask process (step S1), that is, the predetermined portion on the surface of workpiece applies corrosion-resistant glue to carry out mask process to workpiece; Spray etching (step S2) is carried out to the workpiece after mask process, to form initial concaveconvex structure on the described surface of work; Demoulding process is carried out, to remove the corrosion-resistant glue (step S3) on the surface of workpiece to the workpiece after etching; By surface removal, the workpiece of corrosion-resistant glue is put in etching solution and soaks predetermined time (step S4), to remove the seamed edge of continuous print initial convex-concave structure and to reduce the etch depth of the microstructure that will be formed; Workpiece water after soaking is rinsed carry out cleaning, drying then polishing (step S5), thus form microstructure on the described surface of workpiece.
Below in conjunction with Fig. 1 and Fig. 2 to Fig. 5, each step according to engraving method of the present invention is described in more detail.
The engraving method of matrix and/or convex microstructure is formed according to the surface at workpiece of the present invention, in step sl, first on the surface of the workpiece of such as die steel, optionally apply corrosion-resistant glue, thus protect the surface of the workpiece of such as die steel etc. selectively; Then, drying and processing, exposure-processed, development treatment and drying and processing are again carried out, can protect the surface of workpiece in follow-up etching work procedure more enduringly to workpiece.
Specifically, in the mask process operation (step S1) of engraving method according to the present invention, the predetermined portion that the step that the surface of workpiece optionally applies corrosion-resistant glue is included in the surface of workpiece applies corrosion-resistant glue, the surface of workpiece is made to have comprised the coating part of corrosion-resistant glue and the uncoated part of not coated corrosion-resistant glue coated, wherein, uncoated part corresponds to the concave structure that will be formed on the surface of workpiece between coating part adjacent one another are.Therefore, on the surface of workpiece, between corrosion-resistant glue adjacent one another are, leave the gap (corresponding to uncoated part) of uncoated corrosion-resistant glue.
According to one embodiment of present invention, the coating part on workpiece surface is array type and each coating part has square shape.Fig. 2 schematically shows the orthographic plan being coated with the workpiece surface of corrosion-resistant glue according to one exemplary embodiment of the present invention.As shown in Figure 2, coating part A on workpiece surface arranges on the surface of the workpiece with the formal rule of array and is arranged between adjacent uncoated part G, gap between uncoated part G adjacent one another are and coating part A can be mutually the same, so that the final concave-convex micro-structure that formation rule is arranged on the surface of workpiece.In this exemplary embodiment according to the present invention, coating part (namely, the corrosion-resistant glue of coating) thickness can in the scope of 30 μm to 60 μm, preferably in the scope of 30 μm to 40 μm, in the scope of 30 μm to 50 μm, in the scope of 40 μm to 50 μm or in the scope of 50 μm to 60 μm; The length of side of each square coating part (corrosion-resistant glue) in the scope of 400 μm to 500 μm, can be preferably 450 μm; Gap width dimension between coating part (corrosion-resistant glue) adjacent one another are can be 120 μm-200 μm, is preferably 150 μm-200 μm.According to a preferred embodiment of the invention, the gap width dimension between coating part adjacent one another are can be 150 μm.Therefore, according to the present invention, when there is chemical reaction in subsequent handling, the coating part being coated with corrosion-resistant glue is protected, and uncoated have the uncoated part generation chemical reaction of corrosion-resistant glue and be removed to form pit.
According to the present invention; coating part is formed (namely on the surface of workpiece; apply corrosion-resistant glue) after; the operation of workpiece being dried successively, exposes, developing and again drying; wherein, in drying operation again, preferably drying time is controlled in the scope of 3 minutes to 10 minutes; again can strengthen the adhesivity of corrosion-resistant glue and workpiece surface like this, thus can guarantee to protect workpiece surface more enduringly in etching work procedure.Here, drying operation, exposing operation and development operation can perform by the method for prior art, therefore, in order to avoid redundancy, there is omitted herein the description of repeatability.
Then, be placed in etching machine by the workpiece after mask process, etching solution sprays from the nozzle of etching machine, to carry out spray etching to workpiece, thus the uncoated part (step S2) on etching workpiece surface.Specifically, in the spray etching operation of engraving method according to the present invention, the etch quantity on the surface to workpiece can be adjusted by the pressure of the etching solution adjusting the nozzle ejection of etching machine.According to one embodiment of present invention, the etching solution that can control to spray from the nozzle of etching machine is that the fan-shaped etching solution being uniformly distributed that each nozzle is sprayed is non-interference and make the complete uniform spraying of the etching solution of work piece surface, thus the uncoated part on etching workpiece surface, that is, etching part is the gap leaving uncoated corrosion-resistant glue between the coated part of corrosion-resistant glue of workpiece surface.
In addition, in the present invention, the spray pressure of etching solution can be controlled according to the etch quantity expected.According to one exemplary embodiment of the present invention, the spray pressure of etching solution can be 1.6psi-1.8psi, is preferably 1.8psi.For the situation that workpiece is the metals such as die steel, preferably controlled as 1min-2min by the etching period of the metals such as the die steel of etching and processing, be preferably 1min; Etching pressure may be controlled to 1.3psi-1.5psi, is preferably 1.5psi.
In addition, according to exemplary embodiment of the present invention, in the spray etching step of engraving method according to the present invention, etching solution can be controlled and etch with the surface of the etching pressure reduced gradually to workpiece by predetermined time interval.Specifically, the initial spray pressure of etching solution can control as mentioned above as 1.6psi-1.8psi, under initial spray pressure, etched (such as predetermined time to the surface spraying of workpiece, 1min-2min), then, namely once etch spray pressure every 1-2min adjustment according to the above-mentioned time period, make spray pressure reduce 0.3psi-0.6psi, until spray pressure is adjusted to 0psi at every turn.The object done like this is that work in-process progressively reduces pressure, can increase side etching quantity or corroding loss because side etching quantity or corroding loss increase with the reduction of pressure.
In engraving method of the present invention, the etching solution of prior art can be adopted to carry out spray etching, such as, adopt by FeCl
3, NaCl and the formulated etching solution of water.According to the present invention, in order to obtain higher etching efficiency and excellent processing effect, preferably, the etching solution that spray etching adopts can be formulated by following component by weight: the iron trichloride of 15%-25%, the hydrofluoric acid of 30%-50% or the nitric acid of 20%-40%, the phosphoric acid of 2%-5%, all the other are water.In detail, above-mentioned etching solution can be prepared by following step: take appropriate iron trichloride, hydrofluoric acid or nitric acid, phosphoric acid and water respectively; By soluble in water for the iron trichloride taken, obtain premixed liquid; Premixed liquid to be obtained is cooled to room temperature, then adds hydrofluoric acid and phosphoric acid, namely obtains described etching solution after mixing.Experiment proves, the etching solution traditional with employing performs compared with engraving method of the present invention, the engraving method of the present invention adopting above-mentioned etching solution to perform can not only form the surface micro-structure of concavo-convex fluctuating and gentle transition on the surface of die steel, and etching efficiency is high and processing effect is excellent.
Fig. 3 A schematically shows the schematic diagram of etched workpiece surface when adopting little pressure to spray in engraving method according to the present invention, and Fig. 3 B schematically shows the schematic diagram of etched workpiece surface when adopting large pressure to spray in engraving method according to the present invention.
When adopting the little uncoated part of spray pressure to workpiece surface to etch, as shown in Figure 3A, the side etching quantity on the surface of workpiece is large, and the etched degree of depth in the surface of workpiece is little.In contrast, under carrying out etching situation in the uncoated part adopting large spray pressure to workpiece surface, as shown in Figure 3 B, the side etching quantity on the surface of workpiece is little, and the etched degree of depth in the surface of workpiece is large.In other words, compared with adopting the situation of large pressure spray etching, when adopting little pressure spray etching, the side etching quantity of workpiece surface is relatively large, and the etched degree of depth of workpiece surface is relatively little.Therefore, according to the present invention, in order to make the side etching quantity on the surface of workpiece consistent, adopt the method progressively reducing spray pressure in etching process to etch.
Fig. 4 shows according to an exemplary embodiment of the present invention for carrying out the structural representation of the etching machine of spray etching.
With reference to Fig. 4, may be used for execution and comprise according to the etching machine of spray etching operation of the present invention: liquid-storing box 1, is used for depositing the etching solution 2 for etching workpiece; Hydro-pump 3, is connected to liquid-storing box 1, the etching solution 2 in liquid-storing box 1 to be transported to the nozzle (not shown) of etching machine; Relief valve 4, is connected between hydro-pump 3 and nozzle (not shown), is used for controlling the pressure of etching solution 2 from nozzle ejection; Worktable 5, to be arranged in etching machine and to be arranged on below nozzle, with the spray making the workpiece (not shown) be placed on it accept etching solution 2.
Although Fig. 4 shows the etching machine that can be used for performing spray etching, the present invention is not limited thereto, those skilled in the art can select suitable etching system to perform according to spray etching operation of the present invention under the teachings of the present invention.
According to the present invention, after the surface of workpiece is etched, perform striping (also can be described as " demoulding ") process, to remove the mask (step S4) of workpiece surface.Here, method well known in the art can be adopted to perform striping process, therefore, in order to avoid redundancy, no longer carry out repeatability at this and describe.
Then, according to one exemplary embodiment of the present invention, the workpiece after demoulding process is put in etching solution and soaks predetermined time and control the etched degree of depth of workpiece surface (step S5).Specifically, workpiece etching and processing crossed is placed in static etching solution and soaks, to remove the seamed edge of continuous convex-concave structure and to reduce the etch depth of the microstructure that will be formed.Here, according to the present invention, the part of the projection of workpiece surface is because the etching solution touched compares very fast with upgrading, so sufficient reacting, etching speed becomes large, and the part of the pit of workpiece surface is not because the impurity row generated goes out, etching solution upgrades slow, so slow corresponsively.Therefore, protruding removal amount is larger than the removal amount of pit.Therefore, according to the present invention, by immersion treatment, the seamed edge of continuous convex-concave structure can be removed and reduce the etch depth of the microstructure that will be formed, thus making the etched degree of depth of workpiece surface consistent.
Here, the etching solution identical or different with the etching solution that uses in aforementioned spray etching can be adopted to soak the workpiece after demoulding process.In order to reduce costs, preferably, the etching solution identical with the etching solution used in aforementioned spray etching can be adopted to soak the workpiece after demoulding process.According to one exemplary embodiment of the present invention, can adopt such as by FeCl
3, NaCl and the formulated traditional etching solution of water soak the workpiece after demoulding process.According to another exemplary embodiment of the present invention, can to adopt by the formulated etching solution of following component by weight to soak the workpiece after demoulding process: the iron trichloride of 15%-25%, the hydrofluoric acid of 30%-50% or the nitric acid of 20%-40%, the phosphoric acid of 2%-5%, all the other are water.
Fig. 5 is the schematic diagram of workpiece before immersion after partially illustrating striping process according to an exemplary embodiment of the present invention, and Fig. 6 partially illustrates workpiece schematic diagram after immersion for a period of time according to an exemplary embodiment of the present invention.
With reference to Fig. 5, after spray etching is carried out to workpiece, remove the mask of workpiece surface, thus remove the corrosion-resistant glue of workpiece surface.In addition, the workpiece surface after striping can also be processed, make the etched surface of workpiece in shape (removing corner angle, circular arc gentle transition) (or the claiming " corner angle ") with chamfering.
Then, the workpiece shown in Fig. 5 is placed in static etching solution and soaks, through after a period of time, obtain schematic diagram as shown in Figure 6.Therefore, by quiet liquid processing, the reaction impurities in workpiece is converged to pit long-pending, reduce bottom reaction.In addition, compared with the other parts of workpiece, the etched speed of faceted portions of workpiece surface is relatively very fast, and etching is also abundant, thus makes the etched depth ratio of workpiece surface more consistent.
In the present invention, carrying out to workpiece etching solution that immersion treatment uses can be identical with etching solution workpiece surface being carried out to spray etching use, to avoid bringing unnecessary impurity, and can reduce costs.
Finally, to the workpiece use water rinsing, drying then polishing after immersion, thus on the surface of workpiece, form the microstructure with protruding and pit.According to exemplary embodiment of the present invention, to after immersion treatment workpiece use water rinse, in flushing process with the machined surface of thieving paper wiping workpiece to prevent from getting rusty.
Fig. 7 A and Fig. 7 B respectively illustrates the three-dimensional plot with the workpiece of microstructure and sectional drawing that are obtained by engraving method of the present invention.
As shown in figures 7 a and 7b, the workpiece that engraving method according to the present invention obtains has section and substantially becomes sinusoidal microstructure.According to one exemplary embodiment of the present invention, with reference to Fig. 7 A, the protruding P of workpiece surface is sinusoidal crest shape, it can have the height of about 70 μm-130 μm, distance between the peak point of two protruding P adjacent one another are can be approximately 600 μm, and the live width of the pit V of workpiece surface can at about 200 μm.
Describe in further detail according to engraving method of the present invention below in conjunction with concrete exemplary embodiment.
Embodiment 1
The surface of die steel workpiece is formed the microstructure with array type concaveconvex structure, and it is obtained by the engraving method comprised the following steps:
(1) mask process is carried out to workpiece: at the some corrosion-resistant glue of the surface-coated of workpiece, described corrosion-resistant glue is square structure, its thickness is 32 μm, leaves the gap of uncoated corrosion-resistant glue between adjacent two corrosion-resistant glue, and the width in described gap is 150 μm;
(2) be put in etching machine by the workpiece after mask process and etch for the first time, the pressure of the etching solution a sprayed from etching machine nozzle is 0.5psi, and etching period is 6min, and wherein, described etching solution a contains FeCl
3, water and NaCl, and FeCl
3, water and NaCl mass ratio be FeCl
3: water: NaCl=30:30:20;
(3) demoulding process is carried out to the workpiece after first etching: be placed in basic solution by the workpiece after etching for the first time, removed from workpiece surface by corrosion-resistant glue;
(4) workpiece after etching is for the first time put in etching solution b and is soaked, soak time 4min, wherein, described etching solution b is identical with the middle etching solution a used of step (2);
(5) by through step (4) process after workpiece water rinse, in flushing process with thieving paper wiping workpiece machined surface to prevent from getting rusty.
Embodiment 2
The surface of die steel workpiece is formed the microstructure with array type concaveconvex structure, and it is obtained by the engraving method comprised the following steps:
(1) mask process is carried out to workpiece: at the some corrosion-resistant glue of the surface-coated of workpiece, described corrosion-resistant glue is square structure, its thickness is 40 μm, leaves the gap of uncoated corrosion-resistant glue between adjacent two corrosion-resistant glue, and the width in described gap is 200 μm;
(2) be put in etching machine by the workpiece after mask process and etch for the first time, the pressure of the etching solution a sprayed from etching machine nozzle is 0.8psi, and etching period is 3min, and wherein, described etching solution a contains FeCl
3, water and HF, and FeCl
3, water and HF mass ratio be FeCl
3: water: HF=35:30:35;
(3) demoulding process is carried out to the workpiece after first etching: be placed in basic solution by the workpiece after etching for the first time, removed from workpiece surface by corrosion-resistant glue;
(4) workpiece after etching is for the first time put in etching solution b and is soaked, soak time 2min, wherein, described etching solution b is identical with the middle etching solution a used of step (2);
(5) by through step (4) process after workpiece water rinse, in flushing process with thieving paper wiping workpiece machined surface to prevent from getting rusty.
Embodiment 3
The surface of die steel workpiece is formed the microstructure with array type concaveconvex structure, and it is obtained by the engraving method comprised the following steps:
(1) mask process is carried out to workpiece: at the some corrosion-resistant glue of the surface-coated of workpiece, described corrosion-resistant glue is square structure, its thickness is 54 μm, leaves the gap of uncoated corrosion-resistant glue between adjacent two corrosion-resistant glue, and the width in described gap is 120 μm;
(2) be put in etching machine by the workpiece after mask process and etch for the first time, the pressure of the etching solution a sprayed from etching machine nozzle is 0.5psi, etching period 6min, and wherein, described etching solution a contains FeCl
3, water, HNO
3and H
4pO
3, and FeCl
3, water, HNO
3and H
4pO
3mass ratio be FeCl
3: water: HNO
3: H
4pO
3=15:45:20:2;
(3) demoulding process is carried out to the workpiece after first etching: be placed in basic solution by the workpiece after etching for the first time, removed from workpiece surface by corrosion-resistant glue;
(4) workpiece after etching is for the first time put in etching solution b and is soaked, soak time 5min, wherein, described etching solution b is identical with the middle etching solution a used of step (2);
(5) by through step (4) process after workpiece water rinse, in flushing process with thieving paper wiping workpiece machined surface to prevent from getting rusty.
The surface of the die steel obtained by embodiment 1-3 has the sinusoidal microstructure of basic one-tenth as shown in figures 7 a and 7b.
In addition, according to the present invention, in order to meet the requirements of surface convex-concave structure pits arc transition, the protruding constructional feature in quadrangular shape, without obvious seamed edge continuously, what adopt is the method that pressure reduces gradually, namely reaching this structural requirement by controlling side etching quantity, then cannot reach this effect with constant spray pressure.Therefore, according to engraving method of the present invention, preliminary etch is carried out by the surface of the workpiece of such as die steel, progressively etching pressure is regulated in etching process, basically form the structure of the microflute with certain side etching quantity, then after striping, in the etching solution of quiet liquid status, changing etch depth by soaking, substantially reaching required etch depth.
Therefore, the surface treatment of the mobile terminal of such as cellular handset can be applied to according to engraving method of the present invention, thus obtain surface aesthetic and there is good skidproof effect and the product of effect of keeping a public place clean.
It will be apparent to those skilled in the art that without departing from the spirit or scope of the present invention, various amendment and change can be made in the present invention.Therefore, the invention is intended to the amendment and the change that cover this invention, as long as these amendments and change are in the scope of claims and equivalent thereof.
Claims (10)
1. an engraving method, is characterized in that described engraving method comprises the steps:
The predetermined portion on the surface of workpiece applies corrosion-resistant glue, mask process is carried out to the described surface after the corrosion-resistant glue of the coating of workpiece;
Spray etching is carried out to the first etching solution of the workpiece after mask process, to form initial concaveconvex structure on the described surface of work;
Demoulding process is carried out, to remove the mask of workpiece surface to the workpiece after etching;
Workpiece after demoulding process is put in the second etching solution and soaks, to remove the seamed edge of the initial convex-concave structure of continuous print and to reduce the etch depth of the microstructure that will be formed; And
By the workpiece use water rinsing, drying then polishing after immersion, thus form microstructure on the described surface of workpiece.
2. engraving method according to claim 1, after it is characterized in that applying corrosion-resistant glue on the predetermined portion on the surface of workpiece, to the operation that the described surface of workpiece performs oven dry, exposure, development and again dries, thus complete the step that mask process is carried out on the described surface after to the corrosion-resistant glue of coating of work.
3. engraving method according to claim 2, is characterized in that, the time length of drying operation is 3min-10min again.
4. engraving method according to claim 1 and 2, it is characterized in that the step applying corrosion-resistant glue on the predetermined portion on the surface of workpiece comprises: the predetermined portion coating on the surface of workpiece has the corrosion-resistant glue of square shape, the surface of workpiece is made to have comprised the coating part of corrosion-resistant glue and the uncoated part of not coated corrosion-resistant glue coated, wherein, uncoated part corresponds to the concave structure that will be formed on the surface of workpiece between coating part adjacent one another are.
5. engraving method according to claim 4, it is characterized in that the coating part of workpiece surface is array type, the thickness of each coating part is between 30 μm and 60 μm, each coating part is the square block of the length of side between 400 μm and 500 μm, and the width in the gap between coating part adjacent one another are is between 120 μm and 200 μm.
6. engraving method according to claim 1, it is characterized in that the step that the workpiece after to mask process carries out spray etching comprises: the etching solution controlling to spray from the nozzle of etching machine is fan-shaped being uniformly distributed, and etches with the part of the uncoated corrosion-resistant glue to workpiece surface.
7. engraving method according to claim 1, is characterized in that the step that the workpiece after to mask process carries out spray etching comprises: control etching solution and etch with the surface of the etching pressure reduced gradually to workpiece by predetermined time interval.
8. engraving method according to claim 7, is characterized in that the initial spray pressure of etching solution is in the scope of 1.6psi-1.8psi, reduces 0.3psi-0.6psi, until spray pressure is adjusted to 0psi under 1min-2min makes spray pressure.
9. engraving method according to claim 1, is characterized in that described first etching solution is identical with described second etching solution.
10. engraving method according to claim 9, it is characterized in that described first etching solution and described second etching solution formulated by following component by weight: the iron trichloride of 15%-25%, the hydrofluoric acid of 30%-50% or the nitric acid of 20%-40%, the phosphoric acid of 2%-5%, all the other are water.
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106283054A (en) * | 2015-06-05 | 2017-01-04 | 深圳市美达成科技有限公司 | The film covering method of sheet metal strip, engraving method and equipment for coating film for etching |
| CN108012421A (en) * | 2017-11-09 | 2018-05-08 | 建业科技电子（惠州）有限公司 | Control separate wells aperture and independent lines thickness production method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106283054A (en) * | 2015-06-05 | 2017-01-04 | 深圳市美达成科技有限公司 | The film covering method of sheet metal strip, engraving method and equipment for coating film for etching |
| CN106283054B (en) * | 2015-06-05 | 2019-02-05 | 深圳市美达成科技有限公司 | Film covering method, engraving method and the equipment for coating film of sheet metal strip for etching |
| CN108012421A (en) * | 2017-11-09 | 2018-05-08 | 建业科技电子（惠州）有限公司 | Control separate wells aperture and independent lines thickness production method |
| WO2019090859A1 (en) * | 2017-11-09 | 2019-05-16 | 建业科技电子（惠州）有限公司 | Manufacturing method for controlling independent pore size and independent wire thickness |
| CN112981403A (en) * | 2020-12-29 | 2021-06-18 | 苏州运宏电子有限公司 | Metal sheet surface fine grain etching process |
| DE102022125370B3 (en) | 2022-09-30 | 2024-01-11 | Hueck Rheinische Gmbh | Method for producing a pressing tool, pressing tool and method for producing a material plate with a pressing tool |
| CN116043225A (en) * | 2022-12-30 | 2023-05-02 | 东莞赛诺高德蚀刻科技有限公司 | Device and method for etching microstructure on curved metal surface |
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