CN110731685A - Spray plating process for pots - Google Patents
Spray plating process for pots Download PDFInfo
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- CN110731685A CN110731685A CN201910839512.XA CN201910839512A CN110731685A CN 110731685 A CN110731685 A CN 110731685A CN 201910839512 A CN201910839512 A CN 201910839512A CN 110731685 A CN110731685 A CN 110731685A
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- Prior art keywords
- pot
- pots
- spraying
- spray coating
- pot body
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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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
- B21D51/22—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like pots, e.g. for cooking
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to the field of kitchenware, and particularly discloses a spray coating process for pots, which comprises a pot body hardening step and a pot body spray coating step, and comprises the following steps of S1 profile extrusion, S2 preheating, S3 hot cutting, cutting a preheated aluminum alloy bar material discharged from heating equipment into a disc-shaped blank with a preset thickness by adopting the hot cutting process, S4 forming into a pot body shape, S5 trimming and deburring the formed pot body, S6 deoiling and degreasing with a cleaning solvent, S7 polishing the outer surface of the pot, S8 spray coating the outer surface of the pot in a flame spray coating mode, S91 shot blasting, S92 sand blasting, S9 spray coating a non-stick layer, wherein the non-stick hardness of the pot formed by the steps is high, and the non-stick coating is not easy to fall off.
Description
Technical Field
The invention relates to the field of kitchenware, in particular to a spraying process of pots.
Background
The spraying pot blank in the prior pot industry basically adopts a surface sand blasting or shot blasting treatment process to increase the roughness of the surface of the pot blank so as to improve the adhesive force of a non-stick coating on the surface, however, the non-stick coating is damaged only by the index of the adhesive force, which is particularly important for the hardness of a pot body.
Aiming at the problems, Chinese patent with application number 201710315897.0 and name iron non-stick pan and processing technology thereof discloses technologies, non-stick paint is sprayed on an aluminum metal layer on the inner surface of the pan and then the pan body is sintered, so that the hardness of the pan body is improved, and the service life of the non-stick pan is prolonged.
Then, the process cannot be fundamentally solved from the source, and the sintering mode is adopted in the process of processing the non-stick pan, so that the processing efficiency is seriously reduced.
Disclosure of Invention
The invention aims to provide spraying processes with high hardness and strong adhesion between non-stick delamination and a pan body.
In order to solve the technical problem, the invention is solved by the following technical scheme:
spray plating process of pan, comprising a pan body hardening step and a pan body spray plating step, wherein the pan body hardening step comprises the following steps:
s1, extruding the section bar, and extruding an aluminum alloy bar with a set diameter through an extruder;
s2, preheating, and continuously heating the aluminum alloy bar extruded from the extruder on line through heating equipment;
s3, hot cutting, namely cutting the preheated aluminum alloy bar from the heating equipment by adopting a hot cutting process and cutting the aluminum alloy bar into a disc-shaped blank with a preset thickness;
s4, molding, namely putting the blank into a die casting machine to be die-cast into a pot shape;
s5, trimming and deburring the formed pot body;
the spraying step of the pot body comprises the following steps:
s6, removing oil, and removing oil stain by using a cleaning solvent;
s7, polishing, namely polishing the outer surface of the pot, roughly polishing by using a hemp wheel, and finely polishing by using a step wheel until the surface is bright; the hard layer with the porous structure forms a relatively smooth surface, so that the pot can be conveniently and well matched with a gas cooking bench when being used subsequently.
S8, spraying on the outer surface of the pot, and spraying the outer surface of the pot by adopting supersonic flame spraying equipment to form a hard coating with the thickness of 0.15-0.30 mm; by using a flame spraying mode, the formed coating can enable the surface to have various properties such as corrosion resistance, wear resistance and high temperature resistance, the macroscopic hardness of a spraying layer containing a hard phase can reach 450HB, and a spray welding layer can reach 65 HRC.
And S9, spraying a non-stick layer, after cooling to normal temperature, spraying PTFE paint on the flat bottom surface of the pan, and baking for 10 minutes at the temperature of 380-440 ℃ to form a non-stick coating with the thickness of 30-45 um.
Preferably, the extrusion raw material in step S1 is from aluminum bar fusion casting.
Preferably, the preheating temperature in step S2 is 250-350 ℃.
Preferably, the hot cutting process in step S3 includes a hydraulic cutter and a propping mechanism, the propping mechanism is used for propping the aluminum alloy bar delivered from the heating device, and the hydraulic cutter is disposed at the outlet of the heating device to cut the preheated aluminum alloy bar into a circular sheet-shaped blank.
By adopting the scheme, the hydraulic cutter is adopted, the driving force is large due to the stable motion in a hydraulic driving mode, the vibration is small in the process of cutting off the aluminum alloy bar, and the notch lines are smooth; and the mode that the aluminium alloy plate is withstood by the jacking mechanism is matched with a hydraulic cutter, the aluminium alloy bar extending out of the hearth is not easy to deform when being cut, the forming quality of the blank is improved, the specification and the model of the blank after being hot-cut can be determined only by controlling the distance between the hydraulic cutter and the jacking mechanism, and the control is convenient.
Preferably, the extrusion pressure of the extruder in step S1 is 350-450T.
Preferably, the cleaning solvent in step S6 includes a sodium hydroxide solution with a concentration of 2-3%, a temperature of 30-40 ℃, and a pH of 12-14.
Preferably, the selected spraying materials are as follows: WC-Cr3C2-NiCr powder with a particle size of 10-45 μm, wherein the powder comprises the following components in parts by mass: 35% of Cr3C2: 32%, NiCr: 32%, and the balance: fe; setting working parameters of the spraying equipment: oxygen consumption 4m3The oxygen pressure is 15 kg/h; the aviation kerosene consumption is 21L/h, and the aviation kerosene pressure is 10 kg/h; the powder feeding speed is 50 g/min.
Preferably, step S91 is further included before step S9, shot blasting is performed, steel balls of 1.2mm-2.0mm are used and sprayed on the surface of the pan under the action of 6-8 atmospheric pressures, the shot blasting time is 15S-25S, so that wave crests and wave troughs with relative fall not smaller than 800 microns are formed on the surface of the pan, the surface of the overall pan is required to be uniformly shot blasted , the steel balls are cleaned and filtered times, the steel balls smaller than 1mm are removed, a proper amount of steel balls are added, the hardness of the pan body with the wave crests and the wave troughs formed by impact deformation is improved by steps, and due to the existence of the wave crests and the wave troughs, when the pan is shoveled, the pan shovel is in contact with the top points of the wave crests, the rest parts are prevented from being in contact with most of non-stick coatings, the service life of the non-stick pan is prolonged, and the structures of the wave crests and the.
Preferably, step S92 is further included after step S91, wherein the blasting is performed by using compressed air of 0.5-0.7 MPa to spray the spraying material on the inner surface of the pot body at a high speed by using 40-mesh or 60-mesh carborundum high-speed spraying beams. The adhesion fastness of the coating is increased, so that the wear resistance and the non-stick performance of the product are improved, the shot blasting surface is wire drawing lines from wave crests to wave troughs in a microscopic state, and the sand blasting is to form tiny wave crests and wave troughs on the surfaces of the wire drawing lines so as to increase the surface area of the coating contacted with the wave crests and the wave troughs, so that the adhesion performance of the coating is enhanced.
Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:
1. compared with the mode of roll forming the bar, the extrusion of the aluminum alloy bar is a convergent forming mode, so that the aluminum alloy bar has better density and grain structure than the roll formed aluminum bar, and the subsequent non-stick pan product has better product quality and performance improvement in tensile strength, yield strength, elongation, hardness and the like;
2. the bar with the designed diameter is directly extruded, so that the round sheet-shaped blank with the designed size can be obtained only by longitudinally cutting the bar, and compared with a square material, the steps of spinning and transversely cutting are omitted, the processing time is shortened, and the efficiency is improved;
3. by adopting the hot cutting process, compared with the hot cutting, the aluminum scraps are not generated basically, and the utilization rate of raw materials is improved;
4. the material is directly cut in the process of preheating the bar, so that the material preparation and preheating processes are synchronously carried out, and the processing efficiency is greatly improved;
5. the outer pot body of the pot is sprayed by flame, so that the outer pot body of the pot firstly forms a hard layer and has good corrosion resistance, wear resistance and high temperature resistance;
6. the pan bottom after shot blasting forms a fine wave crest and wave trough structure, so that the adhesive capacity of the non-stick coating is improved, the contact area between the non-stick coating and the slice is reduced, the risk of falling of the slice is reduced, and the service life of the slice is prolonged.
Detailed Description
The present invention is further described in with reference to the following examples.
Example 1
A spray process for pots, using a 28cm diameter pan as an example, hot-cut an extruded bar of aluminum alloy 60cm in diameter into disk-shaped blanks 60 x 3cm in size.
The method comprises the steps of firstly optimizing raw materials of a pot body, S1, extruding an aluminum alloy bar with the diameter of 60cm by an extruder after casting an aluminum bar, S2, conveying the extruded aluminum alloy bar into a preheating hearth on line, heating to 330 ℃, preheating for 20 minutes, S3, supporting the end of the aluminum alloy bar which comes out of the hearth and is preheated on a supporting mechanism, directly carrying out on-line hot cutting on the preheated aluminum alloy by a hydraulic cutter at the outlet of the hearth, cutting to obtain a blank, directly falling onto a feeding chute below under the action of the gravity of the blank, and simultaneously entering subsequent die-casting equipment, so that the on-line continuous production effect in the material preparation process is realized, the preheating process is directly completed in the material preparation stage, the subsequent forming process is synchronously butted, S4, the blank is placed into a die-casting machine to be die-cast into the pot body, and S5, trimming and deburring the formed pot body.
Then carrying out the subsequent pot body spraying step, comprising the following steps:
s6, removing oil, namely removing oil stain on the pot body by using a sodium hydroxide solution with the concentration of 2-3%, the temperature of 30-40 ℃ and the PH value of 12-14;
and S7, polishing, namely polishing the outer surface of the pot, roughly polishing by using a hemp wheel, and finely polishing by using a step wheel until the surface is bright, wherein the smooth outer surface is prepared for flame spraying in the next step , so that the outer surface of the pot body after flame spraying is smooth.
S8, performing spray coating on the outer surface of the pot, and performing spray coating by adopting supersonic flame spraying equipment to form a hard coating with the thickness of 0.15-0.30 mm; by using a flame spraying mode, the formed coating can enable the surface to have various properties such as corrosion resistance, wear resistance and high temperature resistance, the macroscopic hardness of a spraying layer containing a hard phase can reach 450HB, and a spray welding layer can reach 65 HRC.
S91, shot blasting, namely spraying steel balls with the diameter of 1.2-2.0 mm on the surface of the pot under the action of 6-8 atmospheric pressures, wherein the shot blasting time is 15-25S, so that wave crests and wave troughs with the relative fall of not less than 800 mu m are formed on the surface of the pot;
s92, sandblasting, wherein after the step S91, the method also comprises a step S92 of sandblasting, wherein the sandblasting adopts compressed air of 0.5-0.7 MPa to spray the sandblasting material to the inner surface of the pot body at a high speed by 40-mesh or 60-mesh carborundum high-speed spray beams;
s9, spraying a non-stick layer, spraying PTFE paint on the flat bottom surface or the whole inner surface of the pan, and baking for 10 minutes at 380-440 ℃ to form the non-stick coating with the thickness of 30-45 um.
Example 2
Pan spraying process, which is different from example 1, is to produce pan with 20cm caliber.
Comparative example 1
A spray plating process for pots was carried out using a pan having a 28 cm-diameter, and steps S1-S3 and S8 were omitted from example 1.
Comparative example 2
A spray plating process for pots was carried out using a pan having a 20cm diameter, and steps S1-S3 and S8 were omitted from example 2.
The non-stick pans obtained in the above examples 1 and 2 and comparative examples 1 and 2 were selected for the corresponding mechanical property tests, and the specific test results are shown in the following table 1.
Table 1:
as can be directly seen from the table 1, the process in the scheme has the advantage that the hardness and the use times of the flat-bottom non-stick pan with the same caliber are greatly improved.
Claims (9)
- The spraying process of kinds of pots is characterized by comprising a pot body hardening step and a pot body spraying step, wherein the pot body hardening step comprises the following steps:s1, extruding the section bar, and extruding an aluminum alloy bar with a set diameter through an extruder;s2, preheating, and continuously heating the aluminum alloy bar extruded from the extruder on line through heating equipment;s3, hot cutting, namely cutting the preheated aluminum alloy bar from the heating equipment by adopting a hot cutting process and cutting the aluminum alloy bar into a disc-shaped blank with a preset thickness;s4, molding, namely putting the blank into a die casting machine to be die-cast into a pot shape;s5, trimming and deburring the formed pot body;the spraying step of the pot body comprises the following steps:s6, removing oil, and removing oil stain by using a cleaning solvent;s7, polishing, namely polishing the outer surface of the pot, roughly polishing by using a hemp wheel, and finely polishing by using a step wheel until the surface is bright;s8, spraying on the outer surface of the pot, and spraying the outer surface of the pot by adopting supersonic flame spraying equipment to form a hard coating with the thickness of 0.15-0.30 mm;s9, spraying the non-stick layer, after cooling to normal temperature, spraying PTFE paint on the flat bottom surface of the inner surface of the pot, and baking for 10 minutes at 380-440 ℃ to form the non-stick coating with the thickness of 30-45 um.
- 2. The spray coating process of kinds of pots of claim 1, wherein the extrusion raw material in step S1 is from aluminum bar melt casting.
- 3. The spray coating process for kinds of pots as claimed in claim 1, wherein the preheating temperature in step S2 is 250-350 ℃.
- 4. The spray coating process on kinds of pots of claim 1, wherein the hot cutting process in step S3 includes a hydraulic cutter and a holding mechanism, the holding mechanism is used to hold the aluminum alloy bar delivered from the heating device, the hydraulic cutter is disposed at the outlet of the heating device to cut the preheated aluminum alloy bar into a disc-shaped blank.
- 5. The spray coating process of kinds of pots in claim 1, wherein the extrusion pressure of the extruder in step S1 is 350-450T.
- 6. The spray plating process for kinds of pots of claim 1, wherein the cleaning solvent in step S6 comprises NaOH solution with concentration of 2-3%, temperature of 30-40 ℃, and pH of 12-14.
- 7. The spray coating process of pots of claim 1, wherein the spray coating material selected is WC-Cr3C2-NiCr powder with a particle size of 10-45 μm, wherein the powder comprises the following components in parts by mass: 35% of Cr3C2: 32%, NiCr: 32%, and the balance: fe; setting working parameters of the spraying equipment: oxygen gasGas consumption 4m3The oxygen pressure is 15 kg/h; the aviation kerosene consumption is 21L/h, and the aviation kerosene pressure is 10 kg/h; the powder feeding speed is 50 g/min.
- 8. A spray coating process of kinds of pots as claimed in claim 1, further comprising step S91 before step S9, shot blasting using steel balls of 1.2mm-2.0mm under 6-8 atm for 15S-25S to form peaks and valleys with relative fall of not less than 800 um.
- 9. The spray coating process of kinds of pots of claim 1, further comprising step S92 after step S91, in which the spray is sprayed at high speed onto the inner surface of the pot body with a high speed jet of 40-60 mesh diamond grains using compressed air of 0.5-0.7 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910839512.XA CN110731685A (en) | 2019-09-05 | 2019-09-05 | Spray plating process for pots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910839512.XA CN110731685A (en) | 2019-09-05 | 2019-09-05 | Spray plating process for pots |
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| Publication Number | Publication Date |
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| CN110731685A true CN110731685A (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910839512.XA Pending CN110731685A (en) | 2019-09-05 | 2019-09-05 | Spray plating process for pots |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113925354A (en) * | 2021-09-17 | 2022-01-14 | 高邮市新潮自动化机械有限公司 | Aluminum non-stick pan bottom processing technology and non-stick pan thereof |
| CN114959540A (en) * | 2022-07-04 | 2022-08-30 | 江苏贝尔机械有限公司 | Wear-resistant and adhesion-resistant spraying method for inner barrel of battery material mixer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104490248A (en) * | 2014-10-31 | 2015-04-08 | 浙江三禾厨具有限公司 | Non-stick pan machining process |
| CN106216952A (en) * | 2016-08-06 | 2016-12-14 | 宁波路威汽车轮业有限公司 | A kind of wheel hub forging method |
| CN109182948A (en) * | 2018-11-16 | 2019-01-11 | 佛山市南海区科琎精密机械有限公司 | A kind of supersonic flame spraying technique |
| CN109236866A (en) * | 2018-09-18 | 2019-01-18 | 新昌县超海轴承有限公司 | A kind of low ovality deep ditch ball bearing ring processing technology of thin-walled |
-
2019
- 2019-09-05 CN CN201910839512.XA patent/CN110731685A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104490248A (en) * | 2014-10-31 | 2015-04-08 | 浙江三禾厨具有限公司 | Non-stick pan machining process |
| CN106216952A (en) * | 2016-08-06 | 2016-12-14 | 宁波路威汽车轮业有限公司 | A kind of wheel hub forging method |
| CN109236866A (en) * | 2018-09-18 | 2019-01-18 | 新昌县超海轴承有限公司 | A kind of low ovality deep ditch ball bearing ring processing technology of thin-walled |
| CN109182948A (en) * | 2018-11-16 | 2019-01-11 | 佛山市南海区科琎精密机械有限公司 | A kind of supersonic flame spraying technique |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113925354A (en) * | 2021-09-17 | 2022-01-14 | 高邮市新潮自动化机械有限公司 | Aluminum non-stick pan bottom processing technology and non-stick pan thereof |
| CN114959540A (en) * | 2022-07-04 | 2022-08-30 | 江苏贝尔机械有限公司 | Wear-resistant and adhesion-resistant spraying method for inner barrel of battery material mixer |
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Application publication date: 20200131 |