CN103142132A - Method for manufacturing stainless steel or compound steel non-stick pan - Google Patents
Method for manufacturing stainless steel or compound steel non-stick pan Download PDFInfo
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- CN103142132A CN103142132A CN2013100892926A CN201310089292A CN103142132A CN 103142132 A CN103142132 A CN 103142132A CN 2013100892926 A CN2013100892926 A CN 2013100892926A CN 201310089292 A CN201310089292 A CN 201310089292A CN 103142132 A CN103142132 A CN 103142132A
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Abstract
The invention provides a method for manufacturing a stainless steel or compound steel non-stick pan and belongs to the technical field of non-stick pan manufacturing technique. The method solves the technical problems that the non-stick performance of a non-stick pan in the prior art is poorer and pollution can be easily caused. The method comprises the following steps that a, surface pattern treatment: concave-convex lines with preset patterns are formed in a preset zone on the surface of a stainless steel plate through a chemical etching, graving or rolling depression method; b, drawing forming: the stainless steel plate body is drawn to form a pan body, and the preset zone is positioned in the working zone of a formed pan body; c, spraying of non-stick coating: non-stick coating is sprayed to the preset zone on the inner surface of the pan body, so that the non-stick coating is coated on the preset zone on the inner surface of the pan body; d, polishing: the preset zone on the inner surface of the pan body is subjected to mechanical polishing, the non-stick coating on the convex surfaces of the concave convex lines is removed, and the non-stick coating on the concave surfaces of the concave convex lines is retained. The method for manufacturing the stainless steel or compound steel non-stick pan has the advantages of durability and good non-stick property.
Description
Technical field
The invention belongs to the non-stick pan manufacturing process technology field, relate to a kind of manufacture method of non-stick pan, particularly the manufacture method of the non-stick pan of a kind of stainless steel or clad steel.
Background technology
Cooker in the market, stainless steel cooker have non-corrosive and the advantage such as light, be subjected to very much user's favor, but unique deficiency are exactly a bit that the stainless steel cooker is sticking especially, and allowing the people unacceptable in the time of use most is exactly this point.For solving this shortcoming, everybody adopts plating ceramic coating or spray non-viscous paint etc., and is always undesirable.Adopt the plating ceramic coating, although than the stainless cooker of light not viscosity can make moderate progress, but and non-viscous paint is than very large gap is arranged, spray non-viscous paint on stainless steel is direct, when bringing into use, viscosity can be not fine, but do not cross several times, coating is just fallen by shovel, compare far short of what is expectedly because the hardness of coating and we compatriots cook the hardness of the spades of custom use, coating is not just fallen by shovel several times, and viscosity has not just had at once.The suggestion of a lot of cooker producer is not used spades or is given the shovels such as wood shovel or silica-gel nylon for this reason.
manufacture method and the equipment thereof of the non-stick pan of the disclosed a kind of stainless steel of its manufacture method such as patent (CN 2889115Y) or clad steel, at first the stainless steel raw material are placed in the mould punch forming, then the non-stick pan inner surface is carried out machine glazed finish, and carry out oil removal treatment and cleaning, then non-stick pan is placed in differential arc oxidization abrasive polishing electrolyte solution, connection is provided with the sine wave commutation power supply of Expert Controller, produce micro-arc discharge at the non-stick pan inner surface, thereby the inner surface original position at non-stick pan progressively grows one deck with titanium dioxide two chromium, titanium dioxide two manganese are the hard of master, wear-resisting, the cermet oxide-film that resistance to corrosion is strong, to increase stainless hardness, heat resistance, corrosion resistance, solved the wear-resisting problem of the non-stick pan of stainless steel in the past or clad steel, make stainless steel material be applied to the field of non-stick pan.
But above-mentioned stainless steel or the non-stick pan of clad steel also exist defective, the not viscosity of cermet oxide-film can be compared with present teflon coating, viscosity can not be an order of magnitude, just slightly better than stainless steel, simultaneously, also higher by this explained hereafter cost of plating mode, electroplate liquid easily causes the severe contamination of environment.
Summary of the invention
The present invention is directed to the problems referred to above that existing technology exists, technical problem to be solved by this invention is: a kind of with low cost and manufacture method of the non-stick pan of can be the well lasting sticking stainless steel of viscosity or clad steel not is provided.
Purpose of the present invention can realize by following technical proposal:
The manufacture method of the non-stick pan of a kind of stainless steel or clad steel is characterized in that this method comprises the steps:
A, surface detail process: the concave convex texture by chemical etching or engraving or rolling depression method formation predetermined pattern in corrosion resistant plate surface programming zone;
B, drawing and forming: the corrosion resistant plate drawing and forming is made a pot body, make described predeterminable area be arranged in the working region of pot body after moulding;
C, spraying non-viscous paint: the predeterminable area that inner surface of pot body is had sprays non-viscous paint, makes the predeterminable area of the inner surface of pot body be coated with non-sticking lining;
D, polishing: the predeterminable area to inner surface of pot body carries out mechanical grinding, and the non-sticking lining at the crowning place in concave convex texture is removed, and keeps the non-sticking lining at the place of recessed surface in concave convex texture.
its principle is as follows: after the inner surface of stainless-steel pan body forms concave convex texture, with spray painting in the predeterminable area of the inner surface of stainless-steel pan body, make recessed surface and the crowning of the concave convex texture of inner surface of pot body all be coated with non-sticking lining, by the non-sticking lining removal of polishing with the crowning position, make the non-sticking lining of recessed surface bottom be kept, the pot body is at ordinary times when the uses such as cooking like this, due to the non-sticking lining of slice shovel less than the concave convex texture bottom, just make non-sticking lining can not fallen by shovel, thereby protected non-sticking lining, because the hardness of stainless steel itself is very high, so be difficult to when in use wearing and tearing, so just protected the figure layer, accomplish lasting not sticking effect.When the Area Ratio of concave convex texture was larger, the not viscosity of non-stick pan can be better.this method adopts chemical etching or is carved in the surface manufacturing concave convex texture of corrosion resistant plate, by the spraying of inner surface of pot body and polishing having been formed easily the non-sticking lining at concave convex texture recessed surface position, thereby the technique such as avoided electroplating on the corrosion resistant plate surface, overcome the electroplating cost that exists in the prior art higher, electroplate liquid easily causes the problems such as severe contamination of environment, the manufacture method of this non-stick pan makes processing very convenient, the stainless steel of making simultaneously or the non-stick pan of clad steel have sturdy and durable, the benefit such as sticking lastingly, greatly increased the service life of non-stick pan.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the chemical etching in described step a comprises following operation: a1, pretreatment: corrosion resistant plate is cleaned and dry; A2, printed patterns: be printed with ink logo by screen printing mode in the predeterminable area on corrosion resistant plate surface; A3, drying: the corrosion resistant plate that will print ink logo is put into baking oven and is toasted, and makes ink setting and combines closely on the corrosion resistant plate surface; A4, upper protective layer: coat protective layer at stainless non-pattern position; A5, etching: corrosion resistant plate is sent into carried out etching in etching machine again, form corresponding concave convex texture according to the shape of ink logo at the stainless steel watch facet etch; A6, cleaning: will wash through printing ink and the protective layer on overetched corrosion resistant plate surface.This chemical etching adopts the mode of serigraphy to carry out the printing of ink logo; make very convenient; cost compare is low; easily be designed to the pattern of complexity attractive in appearance; coat protective layer at stainless non-pattern position and can prevent that the surface at stainless non-pattern position is corroded; chemical etching is compared with mechanical finishing impression etc., and cost compare is low.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the baking temperature in described operation a3 is 60-160 ℃, and stoving time is 5-50 minute.In this interval baking temperature and stoving time, it is best that the conjugation of printing ink and corrosion resistant plate can reach.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the etched temperature in described operation a5 is 30-65 ℃.Etched equipment is generally plastics, says on principle that temperature is higher, and etched speed is faster; but in order to prevent the damage of equipment, also need etched temperature is controlled, in the etch temperature in above-mentioned interval; not only can reach etched velocity efficiency, also take into account simultaneously the protection of equipment.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the protective layer in described operation a4 is plastic film layers or ink lay.Cover all the other positions of corrosion resistant plate by plastic sheeting and printing ink, make these positions can be not etched.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the chemical solution that the etching in described operation a5 is adopted is ferric trichloride, and its concentration is 30%-40%, and described etching pressure is 1.5-2.5KG/CM
2In general, etched pressure is more large faster, but excessive pressure can wash out printing ink, in above-mentioned interval pressure, has taken into account the requirement of two aspects.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, cleaning the solution that adopts in described operation a6 is the sodium hydroxide solution of 5%-10%, and the time of its cleaning is 60-80 second, and the temperature of cleaning is 45-60 ℃, and spray is pressed and is 1.5-2.5KG/CM
2After etching, printing ink still covers on stainless steel substrate, can effectively remove printing ink by this method, lays a solid foundation for spraying together down non-viscous paint.
As another kind of scheme, in the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the chemical etching in described step a comprises following operation: a11, pretreatment: corrosion resistant plate is cleaned and dry; A12, spraying photosensitive-ink: apply uniformly photosensitive-ink, then preheating and drying at stainless steel surfaces; A13, exposure: under the film egative film of predetermined pattern, the photosensitive-ink of stainless steel surfaces is exposed with high-pressure mercury-vapor lamp or metal halide lamp; A14, development: the printing ink through the stainless steel surfaces after sensitization is developed with sodium carbonate liquor; A15, strongization: corrosion resistant plate is put into baking box carry out baking-curing.The method that this employing photosensitive-ink exposure forms pattern is fairly simple, easily operation, and the fiting chemical etching can form complicated relief pattern.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, preheat temperature in described operation a12 is 50-85 ℃, be 10-30min preheating time, the optical source wavelength that adopts in described operation a13 is 300-400 μ m, time for exposure is 20-30s, in described operation a14, the solubility of sodium carbonate liquor is 0.8%-1.2%, 28 ℃-32 ℃ of liquid temperatures, and 1.5-2.5KG/CM is pressed in spray
2, the time is 50-60 second approximately, and described strongization temperature is the 130-160 degree, stoving time 5-10 minute.In above-mentioned interval numerical value, the pattern quality of exposure moulding is better than the quality of numerical value moulding in non-interval greatly.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, the engraving in described step a comprises cutting engraving and laser engraving.For the making of concave convex texture, machining is also a kind of method, and the scope of application is wide, and laser engraving can be made more accurate decorative pattern.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, be provided with the sandblast operation between described step b and step c: the predeterminable area to the inner surface of pot body carries out blasting treatment, makes the roughness of inner surface of pot body increase.When the predeterminable area roughness of the inner surface of pot body was smaller, non-viscous paint and its surperficial conjugation were just smaller, easily come off, and suitably its surface are added bulk processing, can improve the conjugation of non-viscous paint and inner surface of pot body.
In the manufacture method of the non-stick pan of above-mentioned a kind of stainless steel or clad steel, after completing, described steps d also is provided with the mounting handle operation: fix one or two handles on the pot body.After adding one or two handles, make the use of non-stick pan convenient.
Compared with prior art, advantage of the present invention is as follows:
1, concave convex texture is made on this method surface of adopting chemical etching or being carved in corrosion resistant plate, by the spraying of inner surface of pot body and polishing having been formed easily the non-sticking lining at concave convex texture recessed surface position, thereby the technique such as avoided electroplating on the corrosion resistant plate surface, overcome the electroplating cost that exists in the prior art higher, electroplate liquid easily causes the problems such as severe contamination of environment.
2, it is very convenient that the manufacture method of this non-stick pan makes processing; that the stainless steel of making simultaneously or the non-stick pan of clad steel have is sturdy and durable, the benefit such as sticking lastingly; due to the non-sticking lining of slice shovel less than concave convex texture recessed surface position; just make non-sticking lining can not fallen by shovel; thereby protected non-sticking lining, greatly increased the service life of non-stick pan.
3, the present invention suitably adds bulk processing to the inner surface of pot body, can improve the conjugation of non-viscous paint and inner surface of pot body.
4, adopt the non-stick pan the inside of stainless steel that such way processes or clad steel to have very strong decorative pattern, attractive in appearance handy again.
Description of drawings
Fig. 1 is the structural representation of this non-stick pan.
Fig. 2 is the FB(flow block) in this manufacture method embodiment one.
Fig. 3 is the FB(flow block) in this manufacture method embodiment two.
In figure, 1, the pot body; 2, concave convex texture; 3, handle.
The specific embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Embodiment one:
As depicted in figs. 1 and 2, this method comprises the steps:
A, surface detail are processed: surperficial by chemical etching or engraving or rolling depression method formation concave convex texture 2 at corrosion resistant plate; Engraving in step a comprises cutting engraving and laser engraving.For the making of concave convex texture 2, machining is also a kind of method, and the scope of application is wide, and laser engraving can be made more accurate decorative pattern.
Specifically, the chemical etching in step a comprises following operation: a1, pretreatment: corrosion resistant plate is cleaned and drying; A2, printed patterns: be printed with ink logo by screen printing mode in the predeterminable area on corrosion resistant plate surface; A3, drying: the corrosion resistant plate that will print ink logo is put into baking oven and is toasted, and makes ink setting and combines closely on the corrosion resistant plate surface; Baking temperature in operation a3 is 60-160 ℃, and stoving time is 5-50 minute.In this interval baking temperature and stoving time, it is best that the conjugation of printing ink and corrosion resistant plate can reach.A4, upper protective layer: coat protective layer at stainless non-pattern position; Protective layer in operation a4 is plastic film layers or ink lay.Cover all the other positions of corrosion resistant plate by plastic sheeting and printing ink, make these positions can be not etched.A5, etching: corrosion resistant plate is sent into carried out etching in etching machine again, form corresponding concave convex texture 2 according to the shape of ink logo at the stainless steel watch facet etch; Etched temperature in operation a5 is 30-65 ℃.As preferred version, etched temperature is 50 ℃.Etched equipment is generally plastics, says on principle that temperature is higher, and etched speed is faster; but in order to prevent the damage of equipment, also need etched temperature is controlled, in the etch temperature in above-mentioned interval; not only can reach etched velocity efficiency, also take into account simultaneously the protection of equipment.The chemical solution that etching in operation a5 is adopted is ferric trichloride, and its concentration is 30%-40%, and etching pressure is 1.5-2.5KG/CM
2In general, etched pressure is more large faster, but excessive pressure can wash out printing ink, in above-mentioned interval pressure, has taken into account the requirement of two aspects.A6, cleaning: will wash through printing ink and the protective layer on overetched corrosion resistant plate surface.Cleaning the solution that adopts in operation a6 is the sodium hydroxide solution of 5%-10%, and the time of its cleaning is 60-80 second, and the temperature of cleaning is 45-60 ℃.This chemical etching adopts the mode of serigraphy to carry out the printing of ink logo; make very convenient; cost compare is low; easily be designed to the pattern of complexity attractive in appearance; coat protective layer at stainless non-pattern position and can prevent that the surface at stainless non-pattern position is corroded; chemical etching is compared with mechanical finishing impression etc., and cost compare is low.
B, drawing and forming: the corrosion resistant plate drawing and forming is made pot body 1; Make described predeterminable area be arranged in the working region of pot body 1 after moulding;
Be provided with the sandblast operation after step b completes: the predeterminable area to the inner surface of pot body 1 carries out blasting treatment, makes the roughness of pot body 1 inner surface increase.When the inside surface roughness of pot body 1 was smaller, non-viscous paint and its surperficial conjugation were just smaller, easily come off, and suitably its surface are added bulk processing, can improve the conjugation of non-viscous paint and pot body 1 inner surface.
C, spraying non-viscous paint: the predeterminable area to pot body 1 inner surface sprays non-viscous paint, makes the predeterminable area of the inner surface of pot body 1 be coated with non-sticking lining;
D, polishing: the predeterminable area to pot body 1 inner surface carries out mechanical grinding, and the non-sticking lining at the crowning place in concave convex texture 2 is removed, and keeps the non-sticking lining at the place of recessed surface in concave convex texture 2.
After completing, steps d also is provided with mounting handle 3 operations: fix one or two handles 3 on pot body 1.After adding one or two handles 3, make the use of non-stick pan convenient.
After the inner surface of stainless-steel pan body 1 forms concave convex texture 2; with the inner surface of spray painting at stainless-steel pan body 1; make crowning and all the other recessed surface positions of the concave convex texture 2 of pot body 1 inner surface all be coated with non-sticking lining; by the non-sticking lining removal of polishing with the crowning position; make the non-sticking lining at recessed surface position be kept; like this pot body 1 when flat when cooking etc. is used; due to the non-sticking lining of slice shovel less than the recessed surface position; just make recessed surface position non-sticking lining can not fallen by shovel, thereby protected non-sticking lining.When the Area Ratio of recessed facial position in concave convex texture 2 was larger, the not viscosity of non-stick pan can be better.this method adopts chemical etching or is carved in the surface manufacturing concave convex texture 2 of corrosion resistant plate, by the spraying of pot body 1 inner surface and polishing having been formed easily the non-sticking lining at concave convex texture 2 recessed surface positions, thereby the technique such as avoided electroplating on the corrosion resistant plate surface, overcome the electroplating cost that exists in the prior art higher, electroplate liquid easily causes the problems such as severe contamination of environment, the manufacture method of this non-stick pan makes processing very convenient, the stainless steel of making simultaneously or the non-stick pan of clad steel have sturdy and durable, the benefit such as sticking lastingly, greatly increased the service life of non-stick pan.
Embodiment two:
The present embodiment general contents is identical with embodiment one, and institute's difference is, in the present embodiment, as another kind of scheme, as shown in Figure 3, the chemical etching in step a comprises following operation: a11, pretreatment: corrosion resistant plate is cleaned and dry; A12, spraying photosensitive-ink: apply uniformly photosensitive-ink, then preheating and drying at stainless steel surfaces; A13, exposure: under the film egative film of predetermined pattern, the photosensitive-ink of stainless steel surfaces is exposed with high-pressure mercury-vapor lamp or metal halide lamp; A14, development: the printing ink through the stainless steel surfaces after sensitization is developed with sodium carbonate liquor; A15, strongization: corrosion resistant plate is put into baking box carry out baking-curing.The method that this employing photosensitive-ink exposure forms pattern is fairly simple, easily operation, and the fiting chemical etching can form complicated relief pattern.Preheat temperature in operation a12 is 50-85 ℃, be 10-30min preheating time, and the optical source wavelength that adopts in operation a13 is 300-400 μ m, and the time for exposure is 20-30s, in operation a14, the solubility of sodium carbonate liquor is 0.8%-1.2%, and 1.5-2.5KG/CM is pressed in 28 ℃-32 ℃ sprays of liquid temperature
2, the time is 50-60 second approximately, and strongization temperature is the 130-160 degree, stoving time 5-10 minute.In above-mentioned interval numerical value, the pattern quality of exposure moulding is better than the quality of numerical value moulding in non-interval greatly.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has more used 1, the pot body; 2, concave convex texture; 3, the term such as handle, but do not get rid of the possibility of using other term.Using these terms is only in order to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (10)
1. the manufacture method of the non-stick pan of a stainless steel or clad steel, is characterized in that, this method comprises the steps:
A, surface detail process: the concave convex texture (2) by chemical etching or engraving or rolling depression method formation predetermined pattern in corrosion resistant plate surface programming zone;
B, drawing and forming: the corrosion resistant plate drawing and forming is made a pot body (1), make described predeterminable area be arranged in the working region of pot body (1) after moulding;
C, spraying non-viscous paint: the predeterminable area that pot body (1) inner surface is had sprays non-viscous paint, makes the predeterminable area of the inner surface of a pot body (1) be coated with non-sticking lining;
D, polishing: the predeterminable area to pot body (1) inner surface carries out mechanical grinding, and the non-sticking lining at the crowning place in concave convex texture (2) is removed, and keeps the non-sticking lining at the place of recessed surface in concave convex texture (2).
2. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 1 or clad steel, is characterized in that, the chemical etching in described step a comprises following operation: a1, pretreatment: corrosion resistant plate is cleaned and drying; A2, printed patterns: by screen printing mode printing-ink pattern in corrosion resistant plate surface programming zone; A3, drying: the corrosion resistant plate that will print ink logo is put into baking oven and is toasted, and makes ink setting and combines closely on the corrosion resistant plate surface; A4, upper protective layer: coat protective layer at stainless non-pattern position; A5, etching: corrosion resistant plate is sent into carried out etching in etching machine again, form corresponding concave convex texture (2) according to the shape of ink logo at the stainless steel watch facet etch; A6, cleaning: will wash through printing ink and the protective layer on overetched corrosion resistant plate surface.
3. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 1 or clad steel, is characterized in that, the chemical etching in described step a comprises following operation: a11, pretreatment: corrosion resistant plate is cleaned and drying; A12, spraying photosensitive-ink: apply uniformly photosensitive-ink, then preheating and drying at stainless steel surfaces; A13, exposure: under the film egative film of predetermined pattern, the photosensitive-ink of stainless steel surfaces is exposed with high-pressure mercury-vapor lamp or metal halide lamp; A14, development: the printing ink through the stainless steel surfaces after sensitization is developed with sodium carbonate liquor; A15, strongization: corrosion resistant plate is put into baking box carry out baking-curing.
4. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 3 or clad steel, it is characterized in that, preheat temperature in described operation a12 is 50-85 ℃, be 10-30min preheating time, the optical source wavelength that adopts in described operation a13 is 300-400 μ m, and the time for exposure is 20-30s, and in described operation a14, the solubility of sodium carbonate liquor is 0.8%-1.2%, 28 ℃-32 ℃ of liquid temperatures, 1.5-2.5KG/CM is pressed in spray
2, the time is 50-60 second approximately, and described strongization temperature is the 130-160 degree, stoving time 5-10 minute.
5. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 2 or clad steel, is characterized in that, the baking temperature in described operation a3 is 60-160 ℃, and stoving time is 5-50 minute; Etched temperature in described operation a5 is 30-65 ℃; Protective layer in described operation a4 is plastic film layers or ink lay.
6. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 2 or clad steel, is characterized in that, the chemical solution that the etching in described operation a5 is adopted is ferric trichloride, and its concentration is 30%-45%, described etching pressure 1.5-2.5KG/CM
2
7. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 2 or clad steel, it is characterized in that, cleaning the solution that adopts in described operation a6 is the sodium hydroxide solution of 5%-10%, the time of its cleaning is 60-80 second, the temperature of cleaning is 45-60 ℃, and spray is pressed and is 1.5-2.5KG/CM
2
8. the manufacture method of the non-stick pan of a kind of stainless steel according to claim 1 or clad steel, is characterized in that, the engraving in described step a comprises cutting engraving and laser engraving.
9. the manufacture method of the non-stick pan of according to claim 1 and 2 or 3 or 4 or 5 or 6 or 7 described a kind of stainless steels or clad steel, it is characterized in that, be provided with the sandblast operation between described step b and step c: the predeterminable area to the inner surface of pot body (1) carries out blasting treatment, makes the predeterminable area roughness of a pot body (1) inner surface increase.
10. the manufacture method of the non-stick pan of according to claim 1 and 2 or 3 or 4 or 5 or 6 or 7 described a kind of stainless steels or clad steel, it is characterized in that, also be provided with mounting handle (3) operation after described steps d is completed: fix one or two handle (3) on pot body (1).
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