CN114041693B

CN114041693B - Cooker and method for manufacturing the same

Info

Publication number: CN114041693B
Application number: CN202111550996.XA
Authority: CN
Inventors: 张明; 李超; 瞿义生; 袁华庭
Original assignee: Wuhan Supor Cookware Co Ltd
Current assignee: Wuhan Supor Cookware Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-12-09
Anticipated expiration: 2041-12-17
Also published as: CN114041693A

Abstract

The application provides a cooking utensil and manufacturing method thereof, wherein, the cooking utensil includes the cooking utensil body, and the cooking utensil body has the internal surface of a plurality of bead structures, is equipped with a plurality of concave-convex structures on every bead structure is equipped with on the surface, and every concave-convex structure is including forming the arch on the bead structure surface and forming a plurality of convex closure on protruding surface, and concave-convex structure adopts the granulation powder spraying of non-stick material to form, a plurality of concave-convex structures are formed by the granulation powder of non-stick material. The cooker according to the present application can have good non-stick properties and scratch resistance, and thus the cooker can have a long non-stick life.

Description

Cooker and method for manufacturing the same

Technical Field

The application relates to the technical field of kitchen equipment, in particular to a cooker and a manufacturing method thereof.

Background

With the improvement of living standard of people, higher requirements are put on appliances for cooking food.

The existing non-stick product is generally sprayed with fluororesin coating on the surface of a metal substrate to play a non-stick role, but the existing non-stick product made of fluororesin has the problem of short service life, and is mainly embodied in the following aspects:

1. is easy to be scratched: the fluororesin is a high molecular material, so that the hardness is low, the surface of the fluororesin is easily scratched when hard foods (such as shells and the like) are stir-fried, and the service life of the fluororesin product is short.

2. No high temperature resistance: the fluororesin is a high-molecular resin, and is cooked into a high-temperature environment, so that the non-adhesiveness is failed due to the easy degeneration of the fluororesin under the high-temperature condition for a long time.

3. The use experience is poor: the fluororesin nonstick coating is used for a soup frying pan, has good use experience, but when the coating is used for a frying pan, a nonstick pan adaptive shovel must be used, the adaptive shovel is made of materials such as silica gel, and the coating is not suitable for cooking conditions in China, such as quick frying and stir frying, and has poor use experience.

Therefore, how to improve the non-stick effect and scratch resistance of the cooker is a problem which needs to be solved urgently in the field.

Disclosure of Invention

Therefore, an object of the present application is to provide a cooker to solve the problem that the non-stick property and scratch resistance of the prior art cooker are to be improved.

According to a first aspect of the present application, there is provided a cooker including a cooker body, the cooker body having an inner surface on which a plurality of rib structures are formed, each rib structure having a surface on which a plurality of concave-convex structures are provided; each of the concave-convex structures includes: the convex-concave structure comprises a protrusion formed on the surface of the convex rib structure and a plurality of convex hulls formed on the surface of the protrusion, wherein the convex-concave structure is formed by spraying granulation powder of non-stick materials.

In an embodiment, the rib structure is an inner surface having a spiral structure formed on the cooker body or a concentric circular rib structure, and the cross-sectional curvature of each rib structure is 1/50mm ^-1 ～1/10mm ^-1 The height is 0.05mm-0.3mm, and the width is 0.1mm-0.5mm.

In the embodiment, the joint between two adjacent rib structures is a plane or an arc surface, and the peak distance between two adjacent rib structures is 0.1mm-0.6mm.

In an embodiment, the height of each convex hull is greater than or equal to 1um, the width is less than or equal to 2um, and the distance between adjacent convex hulls is less than or equal to 2um.

In an embodiment, the granulated powder of the non-stick material has a granular form, each non-stick granule comprises a first granule and a second granule attached to the surface of the first granule, the first granule is a metallic material or a non-metallic porous material, and the second granule is a non-metallic porous material.

In an embodiment, the metallic material comprises at least one of titanium, titanium alloy, iron, stainless steel, low carbon steel, high carbon steel, cast iron, copper alloy, aluminum alloy, nickel, and nickel alloy.

In an embodiment, the non-metallic pore material comprises at least one of titanium oxide, titanium nitride, titanium carbide, ferroferric oxide, ferric oxide, ferrous oxide, aluminum oxide, chromium oxide, and nickel oxide.

In an embodiment, the second particles are attached to the surface of the first particles via a binder including at least one of a cellulose-based binder and an alcohol-based binder.

In an embodiment, the bead structure, the protrusion, and the convex hull are sequentially decreasing structures, and the convex hull is a second particle on the surface of the granulated powder of the non-stick material.

In an embodiment, in the particles of the non-stick material, the weight of the metallic material is 0-30% of the total weight of the particle, the binder is 1-2% of the total weight of the particle, and the non-metallic pore material makes up 100%, based on the total weight of one particle.

According to a second aspect of the present application, there is provided a manufacturing method of a cooker, the manufacturing method including: providing a cooker body, and forming a convex rib structure on the inner surface of the cooker body; providing a non-stick material, and granulating the non-stick material to form granulated powder of the non-stick material; and spraying granulation powder of a non-stick material to form a plurality of concave-convex structures on the surface of the rib structure.

Drawings

The above and other objects and features of the present application will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic cross-sectional view of a cooker according to an embodiment of the present application;

FIG. 2 is a schematic top view of a fin structure according to one embodiment of the present application;

FIG. 3 is a schematic top view of a fin structure according to yet another embodiment of the present application;

FIG. 4 is an enlarged schematic view at I of FIG. 1 according to the present application;

FIG. 5 is a schematic illustration of a particle in a granulated powder of a non-stick material according to an embodiment of the present application;

fig. 6 is a flowchart of a method of manufacturing a cooker according to an embodiment of the present application.

Detailed Description

The concepts of the present application will be described more fully hereinafter.

The non-stick material powder is formed into granulated powder and then is sprayed on the inner surface of the cooker body with the convex edge structure, so that the cooker is obtained, and the manufactured cooker has good non-stick performance and long non-stick service life.

In the prior art, materials with lower surface energy can be used as non-stick materials, for example, non-metal pore materials such as titanium oxide, titanium nitride, titanium carbide, ferroferric oxide, ferric oxide, ferrous oxide, aluminum oxide, chromium oxide and nickel oxide, so that a cooker with good non-stick property can be realized by adding the non-metal pore materials into the cooker which needs to realize the non-stick property.

The inventor finds that the granulating powder of the non-stick material is formed by adopting the non-metal pore material or the granulating powder of the non-stick material is formed by adhering the non-metal pore material on the surface of the metal material, and the granulating powder of the non-stick material is sprayed on the surface of a cooker with a convex edge structure, so that the better non-stick performance and the longer non-stick service life can be realized.

The inventive concept of the present application will be described in detail below with reference to exemplary embodiments.

According to an embodiment of the first aspect of the present application, as shown in fig. 1 to 4, there is provided a cooker including a cooker body 10 and a plurality of rib structures 11 formed on an inner surface of the cooker body 10. Wherein a plurality of concave-convex structures 20 are provided on the surface of each rib structure 11, and each concave-convex structure 20 includes a protrusion 21 formed on the surface of the rib structure 11 and a plurality of convex hulls 22 formed on the surface of the protrusion 21. Wherein granulated powder of a non-stick material is sprayed on the inner surface of the cooker body 10 to form the concavo-convex structure 20 as a non-stick coating.

As shown in fig. 2 and 3, the rib structure 11 is an uneven raised structure formed on the inner surface of the cooker body 10, and specifically, may have a spiral line structure, or a concentric circular rib structure, or may be an uneven surface structure of the cooker body 10 after roughening. The rib structure 11 can provide a better coupling force to the cooker body 10 and the concavo-convex structure 20.

The cooking utensil of this application embodiment, through set up bead structure 11 on the surface at cooking utensil body 10, with the granulation powder spraying of non-stick material on bead structure 11, form the concave-convex structure 20 that the arch 21 outer layer has a plurality of convex closure 22 on bead structure 11's surface with the help of the structure of granulation powder, can store up oil in the clearance of adjacent convex closure 22 to the realization has the cooking utensil of non-stick effect.

In particular applications, it has been found that not all of the rib structures 11 contribute significantly to non-stick performance, and to this end, each rib structure 11 has a cross-sectional curvature of 1/50mm in the illustrated embodiment ^-1 ～1/10mm ^-1 . Specifically, as shown in FIG. 1, each rib structure 11 has a height h of 0.05mm to 0.3mm and a width w of 0.1mm to 0.5mm. Preferably, the cross-sectional curvature of each rib structure 11 is 1/30mm ^-1 The height h is 0.2mm and the width w is 0.3mm.

In the embodiment, the joint between two adjacent rib structures 11 is a plane or an arc, as shown in fig. 1, the joint between two adjacent rib structures 11 is an arc, and the peak distance d between two adjacent rib structures 11 is 0.1mm to 0.6mm. Preferably, the peak spacing d may be from 0.2mm to 0.3mm, from 0.3mm to 0.4mm or from 0.2mm to 0.6mm. The peak distance d is the distance between the highest points of two adjacent rib structures 11.

As shown in fig. 1 and 4, the rib structure 11, the protrusion 21, and the convex hull 22 are sequentially reduced structures, and each convex hull 22 has a height greater than or equal to 1um and a width less than or equal to 2um. The peak distance between adjacent convex hulls is less than or equal to 2um, so that certain non-stick property can be ensured, and the non-stick coating at the trough position between the adjacent convex hulls 22 is not easy to be damaged by a turner, so as to ensure the non-stick service life. The peak pitch here is the distance between the highest points of two adjacent convex hulls 22. Through setting up above structure, on the one hand can jack up food, reduce the area of contact on food and the cooking utensil body 10 surface, form the physical non-stick structure of "class lotus leaf" structure, on the other hand can reserve oil the most limit, wraps up edible oil in the hole between adjacent convex closure 22, further promotes the non-stick property on pot body surface.

The non-stick material can be bonded to the cooker body 10 with the rib structure 11 by using the conventional non-stick material in the prior art, but the bonding strength of the non-stick coating of the formed cooker is not enough or soft, and the non-stick coating is easy to fall off during use and cannot achieve a longer non-stick life, so the inventor finds that the non-stick material can be granulated to achieve better non-stick performance and scratch resistance so as to achieve a longer non-stick life.

In an embodiment, the granulated powder of non-stick material has a granular form to facilitate the formation of the relief structure 20 on the surface of the ridge structure 11. As shown in fig. 5, each non-stick particle 30 can include a first particle 31 and a second particle 32 attached to the surface of the first particle 31. The first particles 31 may be a metallic material or a non-metallic porous material and the second particles 32 may be a non-metallic porous material.

In an embodiment, the relief structure is formed by spraying with granulated powder of a non-stick material. Specifically, the granulated powder of the non-stick material has a particle form, each non-stick particle is composed of a plurality of powders with smaller particle sizes, each non-stick particle is not dispersed during the spraying process and integrally impacts and adheres to the surface of the cooker body 10, so that each non-stick particle has a certain deformation and is still an integral body, the structure of each non-stick particle is formed into a convex hull-like concave-convex structure, and the convex hull surface is formed by second particles with smaller particle sizes.

In the finally formed concavo-convex structure 20, the metal material can improve the bonding force with the cooker body 10, and the hardness of the concavo-convex structure 20 does not affect the non-stick property. The metallic material may include at least one of titanium, titanium alloy, iron, stainless steel, low carbon steel, high carbon steel, cast iron, copper alloy, aluminum alloy, nickel, and nickel alloy. Preferably, the metal material may include low carbon steel or titanium.

The non-metallic porous material has a low surface energy, is capable of improving non-stick properties and may include at least one of titanium oxide, titanium nitride, titanium carbide, ferroferric oxide, ferric oxide, ferrous oxide, aluminum oxide, chromium oxide, and nickel oxide. Preferably, the non-metallic pore material may include magnetite or titanium nitride. In addition, the non-metal pore material has certain porosity, which is beneficial to oil storage.

In an embodiment, the second particles may be attached to the surface of the first particles via a binder including at least one of a cellulose-based binder and an alcohol-based binder. The cellulose-based binder may include at least one of a hydroxymethyl cellulose-based binder, a hydroxyethyl cellulose-based binder, and a hydroxypropyl cellulose-based binder. The alcohol-based binder may include at least one of a polyvinyl alcohol-based binder, a polypropylene alcohol-based binder, and other higher alcohol-based binders having six or more carbon atoms, however, the present application is not limited thereto, and a suitable binder may be selected according to actual needs.

In the particles of the non-stick material, the weight of the metallic material is comprised between 0 and 30% of the total weight of the particle, the binder is comprised between 1 and 2% of the total weight of the particle, and the non-metallic porosity material makes up 100%, based on the total weight of the particle. When the weight of the metallic material is 0% of the total weight of the granule, it means that the granulated powder of the non-stick material can be formed by at least one non-metallic porous material.

Hereinafter, a method of manufacturing the cooker of the present application will be described in detail with reference to examples.

According to an embodiment of the second aspect of the present application, as shown in fig. 6, there is also provided a manufacturing method of a cooker, the manufacturing method including: step S101, providing a cooker body, and forming a rib structure on the inner surface of the cooker body. Step S102, providing a non-stick material, and granulating the non-stick material to form granulated powder of the non-stick material. And step S103, spraying granulation powder of a non-stick material to form a concave-convex structure on the surface of the rib structure.

With continued reference to fig. 1 and 2, the rib structure 11 may be formed on the surface of the cooker body 10 by a spinning, pressing method. Then, the granulation powder which does not stick to the powder is adopted to form a concave-convex structure 20 with a plurality of convex hulls 22 on the outer layer on the surface of the convex rib structure 11, so as to achieve the purpose of oil storage, and further obtain the cooker with the non-stick effect. The rib structures can be distributed more uniformly to provide the cookware with better appearance and uniform non-stick properties.

As shown in fig. 1, the porosity at the peak position of the rib structure 11 contributes less to the non-stick effect because it is on the surface of the cooker, even if the oil is stored, it will be washed away during cleaning, it will not be immediately effective when the oil is poured in next use, and at the valley position between two rib structures 11, the oil will be stored stably and will not be easily broken during use or cleaning, so as to achieve a long non-stick life.

According to the method of manufacturing the cookware of the present application, providing the non-stick material may include separately preparing non-stick material powders, which may include metallic material powders and non-metallic pore material powders, or may include only non-metallic pore material powders.

When the non-stick material powder comprises metal material powder and non-metal pore material powder, in order to avoid mutual doping of the metal material powder and the non-metal pore material powder and influence on the subsequent spray granulation effect, the raw materials can be respectively subjected to ball milling to obtain the metal material powder and the non-metal pore material powder with certain particle sizes, and then the metal material powder and the non-metal pore material powder are mixed.

In an embodiment, the particle size of the metal material powder may be in the range of 10 to 50 μm, and the particle size of the non-metallic porous material powder may be in the range of 1 to 20 μm. In addition, when the granulated powder of the non-stick material is formed by using the metal material powder and the non-metallic porous material powder together, the particle size of the metal material powder may be in the range of 10 to 50 μm, the particle size of the non-metallic porous material powder may be in the range of 1 to 20 μm, and the particle size of the metal material powder is at least 2 times that of the non-metallic porous material powder.

Here, the particle size of the above-mentioned material may be the maximum length of each material particle, and the material is not particularly limited to have a spherical or spheroidal shape. For example, and without limitation, when a material has an oval shape, the particle size dimension of the material may refer to the length of its major axis.

The granulation of the prepared non-stick material powder may comprise the preparation of a slurry of the binder according to the method of making the cookware of the present application. The prepared non-stick material powder is then added to the above slurry to obtain the slurry required for subsequent spray drying.

Specifically, preparing the binder into slurry may include dissolving the binder, a dispersant and a defoaming agent into deionized water to prepare slurry, wherein the binder may include at least one of a cellulose-based binder and an alcohol-based binder, the defoaming agent may be polyether-modified silicone oil or silicone oil, and the dispersant may be citric acid or triethylhexylphosphoric acid. According to the application, the dispersing agent and the defoaming agent are selected as the auxiliary agents, so that the non-stick material powder can be uniformly dispersed in the slurry, and of course, other suitable auxiliary agents can be selected according to actual needs, and the application is not limited to the above.

By way of example, the slurry may include, in weight percent, 1% -4% binder, 0.5% -1% dispersant, 1% -2% defoamer, and the balance deionized water. The weight ratio of the dispersing agent and the defoaming agent in the slurry is proportional to the weight ratio of the binder, that is, the higher the content of the binder, the higher the content of the dispersing agent and the defoaming agent, so as to enable the powder of the non-stick material to be uniformly dispersed in the slurry.

After the slurry is prepared, the prepared non-stick material powder is added into the slurry according to the weight of the non-stick material powder accounting for 20-70% of the total weight of the slurry. When the weight ratio of the non-stick material powder is less than 20%, the weight ratio of the solid in the slurry is less, and the weight ratio of the liquid is relatively more, so that the granulation time is prolonged, and the cost is too high; when the weight ratio of the non-stick material powder is more than 70%, the weight ratio of solids in the slurry is high, and the weight ratio of liquid is relatively low, so that the subsequent spraying process cannot be stably carried out, and the production stability is influenced.

According to the method of manufacturing a cooker of the present application, after completion of pulping, the resultant pulp is spray-dried.

Specifically, the slurry can be conveyed to a high-speed liquid throwing disc to form liquid drops, then the liquid drops are blown into a drying tower by hot air, and the liquid drops stay for a short time in the descending process to finally form granulated powder of the metal material or the nonmetal pore material with nonmetal pore materials on the surface.

According to some embodiments of the present application, the rotation speed of the high-speed liquid throwing disk may be controlled in a range of 6000 rpm to 10000 rpm, and preferably, may be controlled in a range of 6000 rpm to 8000 rpm, to form a granulated powder structure in which the non-metallic porous material powder is attached on the surface of the metallic material powder or the non-metallic porous material powder.

The hot air with relatively low temperature can reduce the loss of the adhesive, so that enough adhesive is reserved in the granulated powder of the obtained non-stick material powder, and corresponding pores can be synchronously formed in the process of adhesive loss. According to some embodiments of the present application, the temperature of the hot air may be controlled in the range of 60 ℃ to 100 ℃, the temperature of the drying tower may be controlled in the range of 100 ℃ to 400 ℃, and the short residence time of the liquid droplets in the drying tower may be controlled in the range of 5 seconds to 15 seconds.

According to the method of manufacturing a cookware of the present application, the granulated powder of the non-stick material powder obtained after spray drying is sintered.

In particular, after the spray drying is completed, a non-stick material is obtained in the form of granules, which however contain a certain amount of moisture inside and therefore require the cooking utensil to be sintered in order to remove the moisture from the non-stick material. According to some embodiments of the present application, a sintering curve (i.e., a specific parameter in the sintering step) may be prepared according to physical properties of raw materials, and as an example, an initial temperature of sintering may be 25 ℃, a temperature increase rate may be 5-10 ℃/min, a temperature increase to 200 ℃, and then a temperature maintenance may be performed for 3-10 hours. According to the application, the particle size of the non-stick material powder is small, so that the required effect can be achieved at a slow temperature rise speed and a short heat preservation time, and energy can be saved.

According to the non-stick material powder obtained by the present application, the non-stick material powder is sprayed on the surface of the rib structure 11 of the cooker body 10 to form a non-stick coating with the concave-convex structure 20 on the surface thereof, so as to obtain a cooker with a non-stick effect.

Specifically, the spraying can be cold spraying or thermal spraying, wherein the parameters of the thermal spraying are as follows: current: 250-600A; voltage: 30-120V; main gas (argon) flow: 1000-5000L/h; hydrogen flow rate: 20-300L/h; powder feeding air pressure: 200-800L/h; powder feeding amount: 20-200 g/min; spray (gun tip to workpiece distance) distance: 8-40 cm; spraying angle: 30-80 degrees; workpiece temperature: 10-150 ℃.

The parameters of cold spraying were: temperature: 300-800 ℃; main gas pressure: 1.5-5 MPa.

The present application will be described in detail with reference to the following embodiments by taking a pot as an example, but the scope of protection of the present application is not limited to the embodiments.

Example 1

The pot according to example 1 was prepared by the following method.

Step S10, providing a cooker body and forming a curvature of 1/30mm on a surface of the cooker body ^-1 The height is 0.2mm, and the width is 0.4 mm's bead structure.

Step S20: a non-stick material powder is provided. Titanium nitride powder with the average grain diameter of 5 mu m is prepared as a non-metal pore material, low carbon steel powder with the average grain diameter of 30 mu m is prepared as a metal material, and the titanium nitride powder and the low carbon steel powder are mixed according to the weight ratio of 8:2, were mixed.

Step S30: a slurry is prepared that includes a nonstick material powder.

Preparing slurry: by selecting hydroxymethyl cellulose as the binder, the slurry may include, in weight percent, 3% hydroxymethyl cellulose, 0.8% triethylhexyl phosphoric acid, 1.5% silicone oil, and the balance deionized water.

Preparing slurry: the prepared non-stick material powder was added to the prepared slurry in such a way that the total weight of the non-stick material powder was 45% of the total weight of the slurry, thereby preparing a slurry.

Step S40: the slurry was spray dried.

And conveying the slurry to a 7000 r/min high-speed liquid throwing disc, throwing the slurry out by the liquid throwing disc to form liquid drops, blowing the liquid drops into a drying tower at 300 ℃ by hot air at 80 ℃, and falling after short retention in the descending process to obtain non-stick material powder containing certain moisture.

Step S50: sintering the formed non-stick material powder to remove the moisture contained therein, wherein the sintering parameters are as follows: the initial temperature of sintering can be 25 ℃, the heating rate can be 8 ℃/min, the temperature is increased to 200 ℃, and then the temperature is kept for 7 hours, so that the granulated powder of the non-stick material powder is obtained. As analyzed by XRD diffraction, in the granulated powder particles of the non-stick material powder, the weight of the low carbon steel powder was 19.7% of the total weight of the particles, the weight of the hydroxymethyl cellulose was 1.4% of the total weight of the particles, and the weight of the titanium nitride powder was 78.9% of the total weight of the particles, based on the total weight of the particles, and was a granulated powder of a non-stick material in which the titanium nitride powder was adhered to the surface of the low carbon steel powder via a binder.

Step S60, performing thermal spraying on the surface of the rib structure 11 by using granulated powder of a non-stick material, wherein the spraying parameters are as follows: current: 500A; voltage: 80V; main gas flow (argon): 1500L/h; hydrogen flow rate: 100L/h; powder feeding air pressure: 500L/h; powder feeding amount: 100g/min; spray (gun tip to workpiece distance) distance: 30cm; spraying angle: 50 degrees; workpiece temperature: 90 ℃, thereby obtaining the pot of example 1.

Example 2

The pot according to example 2 was manufactured in the same manner as in example 1, except that the low carbon steel powder was replaced with the titanium powder. The obtained granulated powder of the non-stick powder is a structure of titanium nitride powder attached to the surface layer of titanium powder, and XRD diffraction analysis shows that in the granulated powder particles of the non-stick material powder, based on the total weight of the particles, the weight of the titanium powder accounts for 19.6% of the total weight of the particles, the weight of the hydroxymethyl cellulose accounts for 1.4% of the total weight of the particles, and the weight of the titanium nitride powder accounts for 79% of the total weight of the particles.

Example 3

A pot according to example 3 was manufactured in the same manner as in example 1, except that the titanium nitride powder was replaced with the ferroferric oxide powder. The obtained granulated powder of the non-sticky powder is of a structure that ferroferric oxide powder is attached to the surface layer of low-carbon steel powder, and according to XRD diffraction analysis, in the granulated powder particles of the non-sticky material powder, based on the total weight of the particles, the weight of the low-carbon steel powder accounts for 19.8% of the total weight of the particles, the weight of hydroxymethyl cellulose accounts for 1.4% of the total weight of the particles, and the weight of the ferroferric oxide powder accounts for 78.8% of the total weight of the particles.

Example 4

The pot according to example 4 was manufactured in the same manner as example 1, except that the metal powder was removed and only the titanium nitride powder was used. Wherein the obtained granulated powder of the non-stick powder is a granulated powder structure of titanium nitride powder, and by XRD diffraction analysis, in the granulated powder particles of the non-stick material powder, the weight of the hydroxymethyl cellulose accounts for 1.4% of the total weight of the particles, and the weight of the titanium nitride powder accounts for 98.6% of the total weight of the particles.

Comparative example 1

The pot according to comparative example 1 was manufactured in the same method as that of example 1, except that the rib structure was not formed on the surface of the cooker body in step S10. The obtained granulated powder of the non-stick powder is of a structure that titanium nitride powder is attached to the surface layer of low-carbon steel powder, and according to XRD diffraction analysis, in granulated powder particles of the non-stick material powder, based on the total weight of the particles, the weight of the low-carbon steel powder accounts for 19.7% of the total weight of the particles, the weight of hydroxymethyl cellulose accounts for 1.4% of the total weight of the particles, and the weight of the titanium nitride powder accounts for 78.9% of the total weight of the particles.

Comparative example 2

The pot according to comparative example 2 was manufactured in the same manner as in example 1, except that the titanium nitride powder and the low carbon steel powder were not granulated (i.e., steps S30 to S50 were not included).

Comparative example 3

A pot made of a commercially available fluororesin coating.

TABLE 1 (differences from example 1 in particular, see TABLE 1)

Performance index testing

The pots of examples 1-4 and comparative examples 1-2 were subjected to performance tests, the results of which are shown in table 2, and the specific performance test methods were as follows:

(1) And (3) hardness testing: the hardness of the coating was tested and the higher the coating hardness, the better the scratch resistance.

(2) Non-stick test method: the method for testing the non-stickiness of fried eggs in GB/T32095.2-2015 is an initial non-stickiness test and is divided into I, II and III grades, wherein the lower the grade, the higher the non-stickiness.

Table 2: test results of examples and comparative examples of the present application are shown in the table

In combination with the above, it can be seen from table 2 that: the cookers of examples 1 to 4 had good non-stick properties and scratch resistance, and thus could have a long service life.

Although the embodiments of the present application have been described in detail above, those skilled in the art may make various modifications and alterations to the embodiments of the present application without departing from the spirit and scope of the present application. It will be understood that those skilled in the art will recognize modifications and variations as falling within the spirit and scope of the embodiments of the application as defined by the claims.

Claims

1. A cooker, characterized in that the cooker comprises:

a cooker body;

a plurality of rib structures formed on an inner surface of the cooker body;

a plurality of concavo-convex structures formed on surfaces of the plurality of rib structures,

wherein each of the concavo-convex structures includes a protrusion formed on a surface of the plurality of convex ridge structures and a convex hull formed on a surface of the protrusion, a gap between adjacent convex hulls being able to be used for oil storage, the plurality of concavo-convex structures being formed of granulated powder of a non-stick material.

2. The cooker of claim 1, wherein the rib structures are spiral rib structures or concentric circular rib structures, each rib structure having a cross-sectional curvature of 1/50mm ^-1 ～1/10mm ^-1 The height is 0.05mm-0.3mm, and the width is 0.1mm-0.5mm.

3. The cooker of claim 1, wherein the junction between two adjacent rib structures is a flat surface or a curved surface, and the peak distance between two adjacent rib structures is 0.1mm to 0.6mm.

4. The cooker of claim 1, wherein each convex hull has a height of 1um or more, a width of 2um or less, and a pitch of adjacent convex hulls of 2um or less.

5. The cooker according to claim 1,

the granulated powder of the non-stick material is in the form of particles, each non-stick particle comprises a first particle and a second particle attached to the surface of the first particle, the first particle is a metal material or a non-metal pore material, and the second particle is a non-metal pore material.

6. The cooker according to claim 5,

the metal material comprises at least one of titanium, titanium alloy, iron, stainless steel, low-carbon steel, high-carbon steel, cast iron, copper alloy, aluminum alloy, nickel and nickel alloy;

the non-metallic pore material comprises at least one of titanium oxide, titanium nitride, titanium carbide, ferroferric oxide, ferric oxide, ferrous oxide, aluminum oxide, chromium oxide and nickel oxide.

7. The cooker of claim 5, wherein the second granules are attached to the surface of the first granules via a binder comprising at least one of a cellulose-based binder and an alcohol-based binder.

8. The cookware according to claim 5, wherein said bead structure, said protuberance and said convex hull are successively smaller structures, said convex hull being said second granule on the surface of said granulated non-stick material.

9. The cooker of claim 7,

in the particles of the non-stick material, the weight of the metallic material is 0-30% of the total weight of the particles, the binder is 1-2% of the total weight of the particles, and the non-metallic pore material makes up 100%, based on the total weight of the particles.

10. A method of manufacturing a cooker, characterized by comprising:

providing a cooker body, and forming a rib structure on the inner surface of the cooker body;

providing a non-stick material, and granulating the non-stick material to form granulated powder of the non-stick material;

spraying granulation powder of non-stick material to form a plurality of concave-convex structures on the surface of the rib structure,

wherein each of the concavo-convex structures includes protrusions formed on surfaces of the plurality of rib structures and convex hulls formed on surfaces of the protrusions, and gaps between adjacent convex hulls are available for oil storage.