CN108065750B - Manufacturing method of scale mark, non-stick pan and manufacturing method thereof - Google Patents
Manufacturing method of scale mark, non-stick pan and manufacturing method thereof Download PDFInfo
- Publication number
- CN108065750B CN108065750B CN201610999262.2A CN201610999262A CN108065750B CN 108065750 B CN108065750 B CN 108065750B CN 201610999262 A CN201610999262 A CN 201610999262A CN 108065750 B CN108065750 B CN 108065750B
- Authority
- CN
- China
- Prior art keywords
- stick coating
- stick
- spraying
- oil
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/086—Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/025—Vessels with non-stick features, e.g. coatings
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/361—Removing material for deburring or mechanical trimming
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to the technical field of electric heating appliances, and discloses a method for manufacturing scale mark, a non-stick pan and a method for manufacturing the non-stick pan, wherein the method for manufacturing the scale mark comprises the following steps: (1) spraying base oil on the inner surface of the substrate, and drying to form a non-stick coating bottom layer; (2) spraying surface oil on the surface of the bottom layer of the non-stick coating, sintering and curing to form a surface layer of the non-stick coating; after a non-stick coating bottom layer is formed, before surface oil is sprayed or after a non-stick coating surface layer is formed, scale mark marks are formed on the surface of the non-stick coating bottom layer in a laser etching mode. The method for manufacturing the scale mark can ensure that the non-stick coating with high binding force, high hardness, high wear resistance and high corrosion resistance is formed on the substrate under the condition that the scale mark is clear and intact.
Description
Technical Field
The invention relates to the technical field of electric heating appliances, in particular to a method for manufacturing scale mark, a non-stick pan and a manufacturing method thereof.
Background
At present, the waterlines of electric cookers and pressure cookers are mostly manufactured by adopting a pad printing mode, ink is wasted by the manufacturing mode, the problem of incompatibility of pad printing ink and paint often occurs, and pad printing is difficult or the pad printing adhesion force is low. Particularly, the current ceramic coating often has the condition that the ceramic coating has to be engraved due to the fact that pad printing cannot be achieved, the engraving is performed on an electric cooker by a stamping method, and the coating at the position of an engraved rice water line can be abraded and scraped off and the non-stick coating can fall off in the process of washing for multiple times.
Therefore, the method for manufacturing the scale mark has the advantages that the scale mark is clear and complete, the non-stick coating has good binding force with the substrate, and the scale mark has good corrosion resistance, wear resistance and other properties, and has important practical significance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a scale mark manufacturing method, a non-stick pan and a manufacturing method thereof.
In order to achieve the above object, in a first aspect, the present invention provides a method for making a graduation mark, the method comprising:
(1) spraying base oil on the inner surface of the substrate, and drying to form a non-stick coating bottom layer;
(2) spraying surface oil on the surface of the bottom layer of the non-stick coating, sintering and curing to form a surface layer of the non-stick coating;
after a non-stick coating bottom layer is formed, before surface oil is sprayed or after a non-stick coating surface layer is formed, scale mark marks are formed on the surface of the non-stick coating bottom layer in a laser etching mode.
In a second aspect, the invention provides a non-stick pan which comprises a pan base body and a non-stick coating formed on the inner surface of the pan base body, wherein the non-stick coating comprises a non-stick coating bottom layer and a non-stick coating surface layer, and scale mark marks of laser etching are formed on the surface of the non-stick coating bottom layer.
In a third aspect, the invention provides a method for manufacturing a non-stick pan, which comprises the following steps: and forming a non-stick coating on the inner surface of the cookware base body, wherein the forming method of the non-stick coating is carried out according to the method for manufacturing the scale mark.
The invention adopts a laser engraving mode to form scale mark on the surface of the bottom layer of the non-stick coating for the first time (in the laser engraving process, the scale mark is not in contact with the surface of a base material, is not influenced by mechanical motion, can not be scratched or deformed, is not influenced by the elasticity and flexibility of the base material, can be suitable for soft materials, has high processing precision and high speed, and can ensure that the non-stick coating with high binding force (0 grade in a Baige test), high hardness (9H for a ceramic coating, 1H for a fluororesin coating), high wear resistance (2.5kg load, 3M scouring pad, and more than 1.5 ten thousand wear) and high corrosion resistance (more than 4 cycles for salt water resistance) is formed on the base body on the premise of ensuring that the scale mark is clear and intact, wherein according to a preferred embodiment, the nano silver ion antibacterial agent is added into the face oil, the non-stick coating has excellent antibacterial function, can meet the series requirements of consumers on the health and sanitation of the coating of the cooker product, and can ensure that the coating on the surface of the whole cooker substrate has longer service life.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect, the present invention provides a method of making a graduation mark, the method comprising:
(1) spraying base oil on the inner surface of the substrate, and drying to form a non-stick coating bottom layer;
(2) spraying surface oil on the surface of the bottom layer of the non-stick coating, sintering and curing to form a surface layer of the non-stick coating;
after a non-stick coating bottom layer is formed, before surface oil is sprayed or after a non-stick coating surface layer is formed, scale mark marks are formed on the surface of the non-stick coating bottom layer in a laser etching mode.
In order to improve the adhesion of the non-stick coating to the substrate in the method of the present invention, the method preferably further comprises: before the step (1), the substrate is pretreated.
The specific method of pretreatment is not particularly limited, and may be various methods commonly used in the art for pretreating a substrate before spraying, wherein when the non-stick coating is a ceramic coating, the method of pretreatment may include: sequentially carrying out oil removal treatment, first water washing treatment, first drying treatment, sand blasting treatment, alkali washing treatment, neutralization treatment, second water washing treatment and second drying treatment on a matrix; when the non-stick coating is a fluororesin coating, the pretreatment method may comprise: sequentially carrying out oil removal treatment, first washing treatment, first drying treatment, sand blasting treatment, alkali washing treatment, neutralization treatment, second washing treatment, anodic oxidation treatment, hole sealing treatment and second drying treatment on the matrix.
Specifically, the conditions of the degreasing treatment may include: the temperature is 50-60 ℃ and the time is 5-10 minutes. The degreasing agent used for degreasing treatment is not particularly limited, and may be any of various degreasing agents commonly used in the art, and for example, weakly basic degreasing agents (surfactants, phosphates, etc.) and organic solvents, etc. are commercially available.
The conditions of the first water washing treatment may include: and cleaning the dirt by using tap water or deionized water.
The conditions of the first drying process may include: the temperature is 60-120 deg.C, and the time is 3-10 min. The drying temperature and time can be adjusted by those skilled in the art according to the size of the workpiece.
The method of blasting is not particularly limited, and may be any of various methods commonly used in the art as long as the inner surface of the substrate can be blasted to obtain a certain surface roughness, and for example, 60 to 150 mesh sand (such as glass sand, brown steel sand, black brown jade, white corundum, silicon carbide, etc.) can be used, and the blast pressure is controlled to 0.2 to 0.9MPa to obtain a roughness of about 2.0 to 5.0. mu.m. After the sandblasting, the residual fine powder particles on the inner surface of the substrate are removed, and the method for removing is not particularly limited, and the residual fine powder particles can be removed by blowing them clean with a high-pressure gas flow or by washing them with water, which are well known to those skilled in the art and will not be described herein.
The conditions of the alkaline washing treatment may include: the temperature is 80-110 ℃, and the time is 15 seconds-2 minutes. The alkaline solution is not particularly limited, and may be various alkaline solutions commonly used in the art, for example, 30 to 50 wt% NaOH, and the temperature and time can be controlled to control Al in the alkaline solution3+The content is 10-60 g/L.
The purpose of the neutralization treatment is to remove residues left on the workpiece after the alkaline etching, and the conditions of the neutralization treatment may include: treating with neutralizing solution of 20-40 wt% nitric acid solution at room temperature for 1-3 min.
The conditions of the second water washing treatment may include: and cleaning the alkali liquor and the neutralizing liquor by using tap water or deionized water.
The conditions of the anodic oxidation treatment may include: the concentration of the sulfuric acid is 100-300g/L, and Al in the electrolyte3+The concentration is 8-28g/L, the temperature is 15-30 ℃, the oxidation voltage is 12-22V, the chain speed is 2600-.
The hole sealing treatment can adopt the hole sealing by boiling water.
The conditions of the second drying process may include: the temperature is 60-120 ℃, and the time is 3-10 minutes. The drying temperature and time can be adjusted by those skilled in the art according to the size of the workpiece.
In the method of the present invention, preferably, the method further comprises: before spraying, respectively curing the base oil and the surface oil. The method of the aging treatment is not particularly limited, and various methods commonly used in the art may be used, and examples thereof include: mixing the corresponding components according to the respective components of the base oil and the surface oil, and then carrying out rolling ripening under stirring. The specific component types, the mixing ratios of the components, the rolling time and the stirring speed can be determined by using the base oil and the surface oil (the operation can be carried out by using respective instructions of the commercially available base oil and surface oil), which are well known to those skilled in the art and will not be described in detail herein.
In the method of the present invention, the base oil is not particularly limited, and may be various base oils commonly used in the art for spraying inner pots, for example, an aqueous base oil or an oily base oil, an organic fluororesin base oil or a ceramic coating base oil, and the above-mentioned base oils are commercially available. Wherein, the aqueous base oil can be inorganic SiO which is a component commonly used in the field after sintering2And a small amount of resin, for example, the aqueous base stock may contain silica sol, filler, fluorosilane, resin and water, and specifically, the aqueous base stock may contain 50 to 70 wt% of silica sol, 4 to 8 wt% of filler, 4 to 8 wt% of fluorosilane, 4 to 8 wt% of resin and 6 to 38 wt% of water, based on the weight of the aqueous base stock.
In the method of the present invention, the surface oil is not particularly limited, and may be various surface oils which are commonly used in the art for forming a non-stick coating surface layer when spraying an inner pan (in the case where laser engraving is performed after forming a non-stick coating surface layer, the surface oil is various surface oils which are commonly used in the art for forming a transparent non-stick coating surface layer when spraying an inner pan), such as aqueous surface oil or oily surface oil, or organic fluorine resin surface oil or ceramic coating surface oil, and the aforementioned surface oils are commercially available. Wherein, the water-based surface oil can be inorganic SiO which is commonly used in the field and mainly comprises sintered components2The various aqueous face oils of (1), for example, the aqueous face oil may contain silica sol, filler, pearl essence and water, and specifically, the aqueous face oil may contain 40 to 60 wt% silica sol, 4 to 8 wt% filler, 4 to 8 wt% pearl essence and 10 to 44 wt% water, based on the weight of the aqueous base oil.
In the method of the present invention, the face oil preferably contains an antibacterial agent, and the antibacterial agent is more preferably a nano silver ion antibacterial agent, nano zinc oxide, or a composite antibacterial agent of a nano silver ion antibacterial agent and nano zinc oxide, and more preferably nano silver ions. The content of the nano silver ion antibacterial agent in terms of silver ions is 0.5 to 5% by weight, more preferably 0.8 to 1.5% by weight, based on the weight of the face oil.
In the method, in order to ensure the film forming quality, the substrate can be preheated to ensure that the temperature of the substrate is within the range of 30-60 ℃ when the base oil is sprayed. Preferably, in step (1), the spraying conditions include: the temperature of the substrate is 30-60 ℃, the pressure of the spray gun is 0.15-0.6MPa, the caliber of the spray gun is 0.8-1.5mm, the spraying distance is 200-300mm, and the thickness of the film is controlled to be 8-25 mu m.
In the method of the present invention, preferably, in the step (1), the drying conditions include: the temperature is 50-120 deg.C, and the time is 3-15 min. The drying operation can be performed in an infrared oven, wherein the drying temperature and time should be controlled so that the base oil can be sufficiently dried, otherwise pinholes are easily generated, the adhesion force is also reduced, and the inspection of the sufficient drying of the base oil is well known by those skilled in the art and will not be described herein.
In the method of the present invention, preferably, in the step (2), when the surface oil is a slurry, the spraying conditions include: the temperature of the substrate is 30-60 ℃, the pressure of the spray gun is 0.2-0.35MPa, the caliber of the spray gun is 1-1.5mm, the spraying distance is 200-300mm, and the film thickness is controlled to be 8-30 mu m; or
When the surface oil is powder, the spraying conditions comprise: spraying by electrostatic spraying with electrostatic spray gun voltage of 20-50kV and film thickness of 30-80 μm.
In the method of the present invention, preferably, in the step (2), the sintering and curing conditions include: first at 60-100 deg.C for 10-15min, and then at 260-430 deg.C for 5-20 min. The treatment at the low temperature section mainly completes the volatilization of the solvent and the auxiliary agent in the coating, and the treatment at the high temperature section mainly ensures that the non-stick coating is fully cured.
In the method of the present invention, preferably, in the step (2), cooling is performed after sintering and solidification to reduce the crystallinity. The cooling can be performed by air cooling, which is well known to those skilled in the art and will not be described herein.
In the method of the invention, the laser etching can be performed before the surface oil is sprayed, or after the surface oil is sprayed and a non-stick coating surface layer is formed, preferably, the laser etching conditions include: the marking frequency is 500-4000Hz, the emission time is 0.001-20 mu s, the line distance is 0.005-0.05mm, and the scanning speed is 500-1500 mm/s. The filling mode of the laser etching can be any one or more of single line filling, cross line filling, dot etching filling and the like. The scanning speed can be adjusted according to the concrete condition, and if the burr phenomenon appears at the radium carving edge, the scanning speed can be reduced a little.
Wherein, the condition of laser radium carving still includes: the light source used when laser etching is carried out after the non-stick coating bottom layer is formed and before the surface oil is sprayed is any light source, such as a red light source or a cold light source, wherein the cold light source is preferably a green light source or a purple light source; the light source used when laser etching is carried out after the non-stick coating surface layer is formed is a cold light source, the non-stick coating surface layer is a transparent non-stick coating surface layer, and the cold light source is further preferably a green light source or a violet light source. Among other things, it will be understood by those skilled in the art that laser etching can etch the non-stick coating primer layer directly (i.e., in the case of laser etching after forming the non-stick coating primer layer and before spraying the top oil), or can etch the non-stick coating primer layer through the transparent non-stick coating top layer (i.e., in the case of laser etching after forming the non-stick coating top layer), both of which can maintain the non-stick coating top layer with excellent non-stick properties. When laser engraving is carried out after the non-stick coating surface layer is formed, a cold light source such as green light or purple light is used for engraving, and a red light source is not used as far as possible, because the energy of a green laser engraving machine (with the wavelength of 532nm) and the energy of a purple laser engraving machine (with the wavelength of 266nm) are low, and the energy of red light (with the wavelength of 1064nm) is high, the non-stick coating surface layer can be ablated, so that the structure of the non-stick coating surface layer can be influenced.
In the method of the present invention, preferably, the substrate is an aluminum pot substrate or an aluminum-stainless steel composite substrate. According to the method, the preparation of the non-stick coating with the scale mark (logo) on the pan body substrate can be completed. The scale mark in the invention comprises a water level scale mark, a number, a word description and the like.
In a second aspect, the invention provides a non-stick pan which comprises a pan base body and a non-stick coating formed on the inner surface of the pan base body, wherein the non-stick coating comprises a non-stick coating bottom layer and a non-stick coating surface layer, and scale mark marks of laser etching are formed on the surface of the non-stick coating bottom layer.
In the non-stick pan of the present invention, preferably, the non-stick pan is a non-stick aluminum pan or a non-stick aluminum-stainless steel composite pan. Wherein, the non-stick pan can be an electric cooker or an electric pressure cooker.
In the non-stick pan of the present invention, preferably, the non-stick coating is a water-based fluororesin coating, a ceramic coating, or a PFA powder coating.
According to the non-stick pan, the non-stick coating can be formed according to the manufacturing method of the scale mark marks, and the description is not repeated.
In a third aspect, the invention provides a method for manufacturing a non-stick pan, which comprises the following steps: and forming a non-stick coating on the inner surface of the cookware base body, wherein the forming method of the non-stick coating is carried out according to the manufacturing method of the scale mark.
Examples
The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, each material used was commercially available, and each method used was a method generally used in the art.
The nano silver ion antibacterial agent is available from Japanese Denshi Denko corporation under the trademark of Ionpure.
The ceramic water-based base oil is purchased from New Hill chemical Co., Ltd, Zhongshan, and has the trademark of SSG-9338MO-1717P (base oil), and comprises a component A, a component B and a component C.
The ceramic water-based surface oil is purchased from New Hill chemical Co., Ltd, Zhongshan, and has the trademark of SSG-9338MO-1717T (surface oil), and comprises a component A, a component B and a component C.
The method for curing the ceramic water-based base oil comprises the following steps: (1) mixing the component A and the component B according to the proportion of 1.2: 1, aging and rolling for 6 hours at the rotating speed of 100 revolutions per minute; (2) rolling the component C for 6 hours at the rotating speed of 100 revolutions per minute; (3) respectively carrying out rolling ripening on the A + B mixed component and the C component for 6 hours according to the weight ratio of 1.5: 1, rolling at 100 rpm for 50min, and filtering with a 400 mesh screen.
The method for curing the ceramic water-based surface oil comprises the following steps: (1) mixing the component A and the component B according to the proportion of 1.25: 1, aging and rolling for 6 hours at the rotating speed of 100 revolutions per minute; (2) rolling the component C for 6 hours at the rotating speed of 100 revolutions per minute; (3) respectively rolling and curing the A + B mixed component and the C component for 6 hours according to the weight ratio of 9: 1, adding a nano silver ion antibacterial agent into the mixture, rolling for 50min at the rotating speed of 100 r/min, and filtering by using a filter screen with 150 meshes.
Example 1
(1) Pretreating an aluminum pot substrate, wherein the pretreatment method comprises the following steps: a) deoiling at 55 deg.C for 8 min; b) washing with deionized water; c) oven drying at 100 deg.C for 5 min; d) adopting 60-80 mesh brown steel sand to perform sand blasting treatment on the inner surface of the aluminum pot base body under the air jet flow pressure of 0.6MPa, and then blowing off the residual powder particles on the inner surface of the pot body base body by using air flow; e) alkali washing with 40 wt% NaOH solution at 80 deg.C for 1 min; f) neutralizing with 20 wt% nitric acid solution for 3 min; g) washing with deionized water, and drying at 80 deg.C for 8 min;
(2) preheating the inner surface of an aluminum pot to 55 ℃, and spraying cured ceramic water-based base oil on the inner surface of the aluminum pot, wherein the spraying conditions comprise that: the temperature is 55 ℃, the pressure of a spray gun is 0.45MPa, the caliber of the spray gun is 1.0mm, the spraying distance is 25cm, and the thickness of the film is controlled to be 22 mu m;
(3) putting the pot body sprayed with the ceramic water-based base oil into an infrared furnace, and drying at 55 ℃ for 10min to form a non-stick coating bottom layer with the thickness of 22 mu m;
(4) spraying cured ceramic water-based surface oil on the surface of the non-stick coating bottom layer, wherein the content of the nano silver ion antibacterial agent in the ceramic water-based surface oil calculated by silver ions is 1 weight percent based on the weight of the ceramic water-based surface oil, and the spraying conditions comprise: the temperature is 45 ℃, the pressure of a spray gun is 0.35MPa, the caliber of the spray gun is 1.2mm, the spraying distance is 25cm, and the thickness of the film is controlled to be 10 mu m;
(5) drying the pan body in an infrared furnace at 70 ℃ for 12min, then sintering the pan body in an electric furnace at 280 ℃ for 15min to form a non-stick coating surface layer with the thickness of 10 mu m, and then air-cooling the non-stick coating surface layer to 25 ℃;
(6) using a green laser etching machine to form scale mark on the surface of the non-stick coating bottom layer in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 2000Hz, emission time is 5 mus, line distance is 0.025mm, and scanning speed is 1100 mm/s; the non-stick pan A1 was obtained, wherein the scale marks were clearly intact.
Example 2
The process of example 1 was followed except that steps (2) - (6) were as follows:
(2) preheating the inner surface of an aluminum pot to 40 ℃, and spraying cured ceramic water-based base oil on the inner surface of the aluminum pot, wherein the spraying conditions comprise that: the temperature is 40 ℃, the pressure of a spray gun is 0.3MPa, the caliber of the spray gun is 0.8mm, the spraying distance is 20cm, and the thickness of the film is controlled to be 20 mu m;
(3) putting the pot body sprayed with the ceramic water-based base oil into an infrared furnace, and drying for 15min at 50 ℃ to form a non-stick coating bottom layer with the thickness of 20 mu m;
(4) spraying cured ceramic water-based surface oil on the surface of the non-stick coating bottom layer, wherein the content of nano silver ion antibacterial agent in the ceramic water-based surface oil calculated by silver ions is 1.5 percent by weight based on the weight of the ceramic water-based surface oil, and the spraying conditions comprise: the temperature is 40 ℃, the pressure of a spray gun is 0.3MPa, the caliber of the spray gun is 1.5mm, the spraying distance is 30cm, and the thickness of the film is controlled to be 8 mu m;
(5) drying the pan body in an infrared furnace at 60 ℃ for 15min, then sintering the pan body in an electric furnace at 260 ℃ for 20min to form a non-stick coating surface layer with the thickness of 8 mu m, and then air-cooling the non-stick coating surface layer to 25 ℃;
(6) the method comprises the following steps of forming scale mark marks on the surface of the bottom layer of the non-stick coating by using a violet laser etching machine in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 1000Hz, emission time is 10 mus, line distance is 0.035mm, and scanning speed is 800 mm/s; the non-stick pan A2 was obtained, wherein the scale marks were clearly intact.
Example 3
The process of example 1 was followed except that steps (2) - (6) were as follows:
(2) preheating the inner surface of an aluminum pot to 60 ℃, and spraying cured ceramic water-based base oil on the inner surface of the aluminum pot, wherein the spraying conditions comprise that: the temperature is 60 ℃, the pressure of a spray gun is 0.6MPa, the caliber of the spray gun is 1.2mm, the spraying distance is 30cm, and the thickness of the film is controlled to be 25 mu m;
(3) putting the pot body sprayed with the ceramic water-based base oil into an infrared furnace, and drying at 80 ℃ for 6min to form a non-stick coating bottom layer with the thickness of 25 mu m;
(4) using a green laser etching machine to form scale mark on the surface of the non-stick coating bottom layer in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 2500Hz, emission time is 15 mus, line distance is 0.01mm, and scanning speed is 1200 mm/s;
(5) spraying cured ceramic water-based surface oil on the surface of the non-stick coating bottom layer subjected to laser etching, wherein the content of a nano silver ion antibacterial agent in the ceramic water-based surface oil calculated by silver ions is 0.8 wt% based on the weight of the ceramic water-based surface oil, and the spraying conditions comprise: the temperature is 60 ℃, the pressure of a spray gun is 0.3MPa, the caliber of the spray gun is 1.0mm, the spraying distance is 20cm, and the thickness of the film is controlled to be 12 mu m;
(6) drying the pan body in an infrared furnace at 90 ℃ for 10min, then sintering the pan body in an electric furnace at 350 ℃ for 8min to form a non-stick coating surface layer with the thickness of 12 mu m, and then air-cooling the non-stick coating surface layer to 25 ℃; the non-stick pan A3 was obtained, wherein the scale marks were clearly intact.
Example 4
According to the method of the embodiment 3, except that in the step (4), a red-light laser etching machine is used for forming scale mark marks on the surface of the non-stick coating bottom layer in a laser etching mode, wherein the laser etching conditions comprise: the marking frequency was 4000Hz, the emission time was 20. mu.s, the line spacing was 0.01mm, and the scanning speed was 500 mm/s.
Example 5
(1) Pretreating an aluminum pot substrate, wherein the pretreatment method comprises the following steps: a) in thatDeoiling at 55 deg.C for 8 min; b) washing with deionized water; c) drying for 5 minutes at 100 ℃; d) adopting 60-80 mesh brown steel sand to perform sand blasting treatment on the inner surface of the aluminum pot base body under the air jet flow pressure of 0.6MPa, and then blowing off the residual powder particles on the inner surface of the pot body base body by using air flow; e) alkali washing with 40 wt% NaOH solution at 80 deg.C for 1 min; f) neutralizing with 20 wt% nitric acid solution for 3 min; g) washing with deionized water; h) carrying out anodic oxidation treatment, wherein the conditions of the anodic oxidation treatment comprise: the concentration of sulfuric acid is 200g/L, and Al in the electrolyte3+The concentration is 18g/L, the temperature is 25 ℃, the oxidation voltage is 18V, the chain speed is 3000mm/min, and the thickness of the obtained oxidation film is controlled to be 4 mu m; i) sealing holes with boiling water; j) drying at 80 ℃ for 8 minutes.
(2) Preheating the inner surface of an aluminum pot to 55 ℃, and spraying cured organic fluororesin base oil (obtained from Dajin Fluorin paint (Shanghai) Co., Ltd., No. EK-1909S-670L) on the inner surface of the aluminum pot, wherein the cured organic fluororesin base oil is obtained by dispersing for 50min at a rotation speed of 50rpm by using a ball mill and filtering with a 200-mesh filter screen, wherein the spraying conditions comprise: the temperature is 55 ℃, the pressure of a spray gun is 0.35MPa, the caliber of the spray gun is 1.0mm, the spraying distance is 25cm, and the thickness of the film is controlled to be 10 mu m;
(3) putting the pot body sprayed with the organic fluororesin bottom oil into an infrared furnace, and drying at 85 ℃ for 15min to form a non-stick coating bottom layer with the thickness of 10 mu m;
(4) spraying cured organic fluorine resin face oil (available from Dajin fluorine paint (Shanghai) Co., Ltd., No. EK-3793M-608L) on the surface of the non-stick coating bottom layer, wherein the cured organic fluorine resin face oil comprises adding nano silver ion antibacterial agent into the face oil, dispersing for 50min at 50rpm by using a ball mill, and filtering by using a 150-mesh filter screen), wherein the content of the nano silver ion antibacterial agent in terms of silver ions in the organic fluorine resin face oil is 1 wt% based on the weight of the organic fluorine resin face oil, and the spraying conditions comprise: the temperature is 35 ℃, the pressure of a spray gun is 0.35MPa, the caliber of the spray gun is 1.2mm, the spraying distance is 25cm, and the thickness of the film is controlled to be 25 mu m;
(5) drying the pan body in an infrared furnace at 100 ℃ for 15min, then sintering the pan body in an electric furnace at 380 ℃ for 20min to form a non-stick coating surface layer with the thickness of 25 mu m, and then air-cooling the non-stick coating surface layer to 25 ℃;
(6) using a green laser etching machine to form scale mark on the surface of the non-stick coating bottom layer in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 2000Hz, emission time is 5 mus, line distance is 0.025mm, and scanning speed is 1100 mm/s; the non-stick pan A5 was obtained, wherein the scale marks were clearly intact.
Example 6
The process of example 5 was followed except that steps (4) - (6) were:
(4) the method comprises the following steps of forming scale mark marks on the surface of the bottom layer of the non-stick coating by using a red-light laser etching machine in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 3500Hz, emission time is 18 mus, line distance is 0.01mm, and scanning speed is 1000 mm/s;
(5) spraying cured organic fluorine resin surface oil (purchased from Dajin fluorine coating (Shanghai) Co., Ltd., No. EK-3793M-608L) on the surface of the non-stick coating bottom layer after laser engraving, wherein the method for curing the organic fluorine resin surface oil comprises the steps of adding a nano silver ion antibacterial agent into the surface oil, dispersing for 50min at the rotating speed of 50rpm by using a ball mill, and filtering by using a 150-mesh filter screen, wherein the content of the nano silver ion antibacterial agent in terms of silver ions in the organic fluorine resin surface oil is 1 wt% based on the weight of the organic fluorine resin surface oil, and the spraying conditions comprise: the temperature is 35 ℃, the pressure of a spray gun is 0.35MPa, the caliber of the spray gun is 1.2mm, the spraying distance is 25cm, and the thickness of the film is controlled to be 25 mu m;
(6) drying the pan body in an infrared furnace at 90 ℃ for 10min, then sintering in an electric furnace at 350 ℃ for 20min to form a non-stick coating surface layer with the thickness of 25 mu m, and then air-cooling to 25 ℃; the non-stick pan A6 was obtained, wherein the scale marks were clearly intact.
Example 7
The process of example 5 was followed except that steps (2) - (6) were:
(2) preheating the inner surface of an aluminum pot to 55 ℃, and spraying cured organic fluororesin base oil (obtained from Dajin Fluorin paint (Shanghai) Co., Ltd., No. EK-1209M8L, the method for curing the organic fluororesin base oil comprises dispersing for 50min at a rotation speed of 50rpm by using a ball mill and filtering by using a 200-mesh filter screen), wherein the spraying conditions comprise: the temperature is 55 ℃, the pressure of a spray gun is 0.35MPa, the caliber of the spray gun is 1.0mm, the spraying distance is 25cm, and the thickness of the film is controlled to be 10 mu m;
(3) putting the pot body sprayed with the organic fluororesin bottom oil into an infrared furnace, and drying at 85 ℃ for 15min to form a non-stick coating bottom layer with the thickness of 10 mu m;
(4) spraying organic fluorine resin surface oil (powder, purchased from Dajin fluorine paint (Shanghai) Co., Ltd., and the mark is ACX-34) on the surface of the bottom layer of the non-stick coating in an electrostatic spraying manner, wherein the content of the nano silver ion antibacterial agent in the organic fluorine resin surface oil is 1 weight percent based on the weight of the organic fluorine resin surface oil, and the spraying conditions comprise: cooling to room temperature, controlling the voltage of the electrostatic spray gun to be 30kV, and controlling the film thickness to be 50 μm;
(5) drying the pan body in an infrared furnace at 100 ℃ for 15min, then sintering the pan body in an electric furnace at 380 ℃ for 20min to form a non-stick coating surface layer with the thickness of 50 mu m, and then air-cooling the pan body to 25 ℃;
(6) using a green laser etching machine to form scale mark on the surface of the non-stick coating bottom layer in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 2000Hz, emission time is 5 mus, line distance is 0.025mm, and scanning speed is 1100 mm/s; the non-stick pan A7 was obtained, wherein the scale marks were clearly intact.
Example 8
The process of example 7 is followed except that steps (4) - (6) are:
(4) the method comprises the following steps of forming scale mark marks on the surface of the bottom layer of the non-stick coating by using a red-light laser etching machine in a laser etching mode, wherein the laser etching conditions comprise: marking frequency is 3500Hz, emission time is 18 mus, line distance is 0.01mm, and scanning speed is 1000 mm/s;
(5) the surface of the non-stick coating bottom layer after laser etching is sprayed with organic fluorine resin surface oil (powder, purchased from Dajin fluorine paint (Shanghai) Co., Ltd., and the brand number is ACX-34) in an electrostatic spraying mode, wherein the content of the nano silver ion antibacterial agent in the organic fluorine resin surface oil counted by silver ions is 1 wt% based on the weight of the organic fluorine resin surface oil, and the spraying conditions comprise: cooling to room temperature, controlling the voltage of the electrostatic spray gun to be 30kV, and controlling the film thickness to be 50 μm;
(6) drying the pan body in an infrared furnace at 90 ℃ for 10min, then sintering the pan body in an electric furnace at 350 ℃ for 20min to form a non-stick coating surface layer with the thickness of 50 mu m, and then air-cooling the non-stick coating surface layer to 25 ℃; the non-stick pan A8 was obtained, wherein the scale marks were clearly intact.
Example 9
The method of example 1 was followed except that the nanosilver ion antimicrobial was not added to the ceramic aqueous face oil. The non-stick pan A9 was obtained, wherein the scale marks were clearly intact.
Test examples
The non-stick cookware A1-A9 (i.e., inner pots) obtained in examples 1-9 were subjected to the following experiments.
1. Acid, alkali and salt resistance:
(1) acid resistance: adding an acetic acid solution with the concentration of 5 weight percent into the inner pot until the position of the maximum scale water level of the inner wall of the inner pot, putting the inner pot into the corresponding pot, continuously heating and boiling (keeping the boiling state) for 10 minutes by electrifying the closing cover, then soaking for 24 hours at 100 ℃, cleaning the inner pot after the test is finished, and visually checking the change condition of the surface of the coating, wherein the result is shown in table 1.
(2) Alkali resistance: adding 0.5 wt% sodium hydroxide solution into the inner pot until the inner wall of the inner pot reaches the maximum scale water level, putting the inner pot into the corresponding pot, continuously heating and boiling (keeping the boiling state) for 10 minutes by electrifying the closing cover, then preserving heat and soaking for 24 hours at 100 ℃, cleaning the inner pot after the test is finished, and visually checking the change condition of the coating surface, wherein the result is shown in table 1.
(3) Salt tolerance: adding a sodium chloride solution with the concentration of 5 weight percent into the inner pot until the position of the maximum scale water level of the inner wall of the inner pot, putting the inner pot into a corresponding pot, electrifying and closing the cover, continuously heating and boiling for 8 hours (replenishing water for 1 time every 2 hours, keeping the liquid level at the position of the beginning of the test), keeping the temperature at 80 ℃ for 16 hours to form a period, visually checking the change condition of the surface of the coating after the test of each period, and recording the period number of the coating with the undesirable phenomena of foaming, salient points and the like, wherein the results are shown in table 1.
2. Scratch resistance: according to GB/T6739-.
3. The binding force is as follows: according to GB/T9286-1998, the coatings A1-A9 were each scribed 1mm with a blade2100 squares of (a) was adhered to the coating at the same diagonal position of 45 deg. with "3M 610 test tape" and then the tape was pulled quickly at an angle of 90 deg. and repeated 3 times, the rating being recorded according to the rating standard of table 1 in GB/T9286-one 1998, and the results are shown in table 1.
4. Wear resistance: washing water with the concentration of 5 weight percent and 3M (7447C) scouring pad with the load of 2.5kgf are prepared by using the scouring pad, the left-right swinging is carried out for 1 time, the scouring pad is replaced every 250 times, whether the coating exposes the base material or not is checked every 250 times (the test is terminated by exposing more than or equal to 10 lines), and the abrasion resistance times are recorded, and the results are shown in table 1.
5. And (3) antibacterial property: the antibacterial rate of A1-A9 against Staphylococcus aureus and Escherichia coli was measured according to GB/T21866-2008, and the results are shown in Table 2.
TABLE 1
As can be seen from Table 1, the method of the present invention can ensure that a non-stick coating with high binding force, high hardness, high wear resistance and high corrosion resistance is formed on the substrate on the premise that the scale marks are clear and intact.
TABLE 2
| Antibacterial rate of Escherichia coli | Antibacterial rate of staphylococcus aureus | |
| A1 | 98.68％ | 97.35％ |
| A2 | 99.99％ | 99.99％ |
| A3 | 91.53％ | 93.46％ |
| A4 | 91.46％ | 93.58％ |
| A5 | 98.54％ | 97.23％ |
| A6 | 98.45％ | 97.15％ |
| A7 | 98.65％ | 97.25％ |
| A8 | 98.24％ | 97.30％ |
| A9 | 15.98％ | 13.15％ |
As can be seen from table 2, the surface oil containing the nano silver ion antibacterial agent was sprayed on the base body of the pot body, and the pot body obtained therefrom had excellent antibacterial properties.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (16)
1. A method of making a graduation mark, comprising:
(1) spraying base oil on the inner surface of the substrate, and drying to form a non-stick coating bottom layer;
(2) spraying surface oil on the surface of the bottom layer of the non-stick coating, sintering and curing to form a surface layer of the non-stick coating;
after a non-stick coating bottom layer is formed, before surface oil is sprayed or after a non-stick coating surface layer is formed, scale mark marks are formed on the surface of the non-stick coating bottom layer in a laser etching mode.
2. The method according to claim 1, wherein in step (1), the conditions of spraying include: the temperature of the substrate is 30-60 ℃, the pressure of the spray gun is 0.15-0.6MPa, the caliber of the spray gun is 0.8-1.5mm, the spraying distance is 200-300mm, and the thickness of the film is controlled to be 8-25 mu m.
3. The method of claim 1, wherein in step (1), the drying conditions comprise: the temperature is 50-120 deg.C, and the time is 3-15 min.
4. The method according to any one of claims 1 to 3, wherein in the step (2), the conditions of spraying include: the temperature of the substrate is 30-60 ℃, the spraying pressure is 0.2-0.35MPa, the caliber of the spray gun is 1-1.5mm, the spraying distance is 200-300mm, and the film thickness is controlled to be 8-30 mu m; or
The conditions of the spraying include: spraying by electrostatic spraying with electrostatic spray gun voltage of 20-50kV and film thickness of 30-80 μm.
5. The method according to any one of claims 1 to 3, wherein in the step (2), the sintering and solidifying conditions comprise: first at 60-100 deg.C for 10-15min, and then at 260-430 deg.C for 5-20 min.
6. The method of any one of claims 1-3, wherein the laser etching conditions include: the marking frequency is 500-4000Hz, the emission time is 0.001-20 mu s, the line distance is 0.005-0.05mm, and the scanning speed is 500-1500 mm/s.
7. The method of claim 6, wherein the laser etching conditions further comprise: the light source used when laser etching is carried out after the non-stick coating bottom layer is formed and before the surface oil is sprayed is a red light source or a cold light source.
8. The method of claim 7, wherein the cold light source is a green light source or a violet light source.
9. The method of claim 7, wherein the light source used in laser etching after forming the nonstick coating top layer is a cold light source, the nonstick coating top layer is a transparent nonstick coating top layer, and the cold light source is a green light source or a violet light source.
10. The method of any of claims 1-3, wherein the method further comprises: before the step (1), the substrate is pretreated.
11. The method of claim 10, wherein the method of pre-processing comprises: sequentially carrying out oil removal treatment, first water washing treatment, first drying treatment, sand blasting treatment, alkali washing treatment, neutralization treatment, second water washing treatment, optional anodic oxidation treatment, optional hole sealing treatment and second drying treatment on the matrix.
12. The method according to any one of claims 1 to 3, wherein the facial oil contains a nano silver ion antibacterial agent in an amount of 0.5 to 5% by weight in terms of silver ions based on the weight of the facial oil.
13. The method of claim 12 wherein the amount of nanosilver antimicrobial agent is from 0.8 to 1.5 weight percent silver ion based on the weight of the facial oil.
14. The non-stick pan is characterized by comprising a pan base body and a non-stick coating formed on the inner surface of the pan base body, wherein the non-stick coating comprises a non-stick coating bottom layer and a non-stick coating surface layer, and scale mark laser engraving marks are formed on the surface of the non-stick coating bottom layer.
15. The non-stick cookware of claim 14, wherein said non-stick coating is a water borne fluororesin coating, a ceramic coating or a PFA powder coating.
16. A method for manufacturing a non-stick pan is characterized by comprising the following steps: forming a non-stick coating on the inner surface of the cookware base by a method according to any of claims 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610999262.2A CN108065750B (en) | 2016-11-14 | 2016-11-14 | Manufacturing method of scale mark, non-stick pan and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610999262.2A CN108065750B (en) | 2016-11-14 | 2016-11-14 | Manufacturing method of scale mark, non-stick pan and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108065750A CN108065750A (en) | 2018-05-25 |
| CN108065750B true CN108065750B (en) | 2020-11-24 |
Family
ID=62161776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610999262.2A Active CN108065750B (en) | 2016-11-14 | 2016-11-14 | Manufacturing method of scale mark, non-stick pan and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108065750B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112603A (en) * | 2018-11-02 | 2019-01-01 | 湖北香江电器股份有限公司 | A kind of production method of cookware coating |
| CN111166763A (en) * | 2020-02-17 | 2020-05-19 | 吴强 | Bactericidal bacteriostatic agent |
| WO2021245702A1 (en) * | 2020-06-04 | 2021-12-09 | Bajaj Electricals Ltd. | An anti-microbial object and a process for manufacturing the same |
| CN114010066A (en) * | 2021-11-11 | 2022-02-08 | 中山市晋盈电器有限公司 | IH inner container for electric cooker and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7903336B2 (en) * | 2005-10-11 | 2011-03-08 | Gsi Group Corporation | Optical metrological scale and laser-based manufacturing method therefor |
| CN105246850B (en) * | 2012-11-29 | 2018-01-30 | 康宁股份有限公司 | Pass through the method for laser damage and etching manufacture glassware |
| CN204068088U (en) * | 2014-08-28 | 2014-12-31 | 苏州市大族激光科技有限公司 | One is produced radium-shine aluminium foil vaporization wheat for signal transmssion line and is drawn bed device |
| CN105058436A (en) * | 2015-07-17 | 2015-11-18 | 济南大学 | Graduated scale kitchen knife |
| CN205018858U (en) * | 2015-08-21 | 2016-02-10 | 浙江苏泊尔家电制造有限公司 | A interior pot and ware of cooking for cooking ware |
| CN106086763B (en) * | 2016-06-15 | 2020-04-17 | 佛山市顺德区美的电热电器制造有限公司 | Pot and preparation method thereof |
-
2016
- 2016-11-14 CN CN201610999262.2A patent/CN108065750B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108065750A (en) | 2018-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108065750B (en) | Manufacturing method of scale mark, non-stick pan and manufacturing method thereof | |
| CN109077620B (en) | Non-stick coating, preparation method thereof, pan or baking tray panel and cooking equipment | |
| KR20180019700A (en) | Method for decorating substrate surface and product therefrom | |
| CN108262646A (en) | A kind of production method of mobile phone A G glass cover-plates | |
| CN102616083A (en) | Surface treatment pattern vacuum deplating process (PPVD) | |
| TW201534487A (en) | Colored metal plate and manufacturing method thereof | |
| TWI700179B (en) | Housing and method for making same | |
| JP4418985B2 (en) | Manufacturing method of product made of magnesium or magnesium alloy | |
| CN108065749B (en) | Method for forming ink mark on water-based ceramic non-stick coating, non-stick pan and manufacturing method thereof | |
| CN110528046A (en) | Forming method, metal shell and the electronic device of metal surface texture | |
| CN104911587A (en) | Shell body of electronic product and processing method thereof | |
| CN105849316B (en) | The base material of color development treatment and the base material color development treatment method for it | |
| WO2018067148A1 (en) | Alloy substrate with exterior coat | |
| CN109930103B (en) | Heating appliance and preparation method thereof | |
| CN108407528A (en) | The method for making decorative pattern | |
| US20160186767A1 (en) | Method for producing member for fluid machines, and member for fluid machines | |
| CN102616070A (en) | Method for surface decoration of metal and plastic composite piece | |
| TWI553164B (en) | Surface treatment of aluminum products | |
| CN112759977A (en) | Water-based ink, multicolor film coating method of metal substrate and electronic equipment | |
| CN102381878B (en) | Manufacturing method of flat roller with self-texturing feature | |
| EP3470549B1 (en) | Surface treatment agent, enamel steel and part coated with same | |
| CN109136817B (en) | Non-stick coating, preparation method thereof, cooker and cooking equipment | |
| CN109291722A (en) | Production method applied to casting of electronic device | |
| CN112275583B (en) | Production method of finish-turned bright hub and hub | |
| CN106984772A (en) | A kind of casting method of high-precision drill bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |