KR101244761B1 - durability reinforcement inner pot for cooker and coating method thereof - Google Patents

Abstract

For the quality of the product, the present invention is an inner pot body made of a container shape to accommodate food therein; A nickel plating layer plated with a nickel strike on the inner surface of the inner pot body; And a heat-resistant paint coating layer formed by coating a heat-resistant paint containing a mixture of pigment and diamond powder as a main component of a coating composition selected from the group including an inorganic modified binder and a fluorine resin on an outer surface of the nickel plating layer. Provide a reinforced inner pot.

Description

Durability reinforcement inner pot for cooker and coating method

The present invention relates to an inner pot for a cooker, and more particularly, to a durable inner pot for a cooker, which improves durability and prevents damage to the appearance, thereby improving product quality.

In general, a cooker on which an inner pot is seated is a device for cooking food by heating food, and a rice cooker using electricity is generally used.

The rice cooker that uses electricity has an electric rice cooker that heats the inner pot by electric energy and cooks food such as rice cooked in the inner pot and keeps warm after it is cooked. Electromagnetic induction cooker is known to heat by using energy to cook after being heated.

Here, the electromagnetic induction cooker is a device that performs a cooking while maintaining the inside of the inner pot at a high temperature pressure by using a heat source and using the heat source, more specifically, the induction current is generated by generating an induction current The food is cooked by the induction heating method of heating the food while generating heat.

On the other hand, the inner pot of the electric rice cooker and the electromagnetic induction cooker is closely related to the calorific value according to its shape and material, and since the taste, cooking time and consumption of electricity are directly determined by the calorific value, the electric rice cooker has recently been introduced. The research on the inner pot, and especially the research on the plating of the metal with excellent heat generation in the inner pot for rice cooker is actively in progress.

More specifically, research on the copper (Cu) plated inner pot is actively underway, usually copper is a metal with low resistance, but the electricity passes well, but there was a problem that is somewhat difficult to generate heat. However, if the copper is processed very thin, there is a property that the electric passage is narrow and powerful heat generation at the same time, if the copper plating to the inner pot using this copper property can be produced an inner pot excellent in heat generation.

However, due to the characteristics of copper plating, there is a problem in that the adhesion of the coating portion for reinforcing the surface of the copper plating portion and the copper plating portion plated on the outer surface of the oven (inner pot) is easily peeled off and the life of the inner pot is shortened.

In addition, when the inner pot is placed inside the cooker or when the inner pot is placed on the bottom of the table, the coating layer may be damaged due to scratches or the like, and durability may be impaired. There was no problem.

In addition, the heat-resistant coating is coated on the inner pot is made of a urethane resin and silicone resin as a main component, the heat-resistant paint is heated for a long time at a high temperature, the inner pot burns and the yellowing phenomenon is intensified, so that the durability of the inner pot itself There was a problem falling.

In order to solve the above problems, the present invention is to provide a durable inner pot for the cooker to increase the durability and prevent damage to the appearance to improve the quality of the product as a problem.

In order to solve the above problems, the present invention is an inner pot body made of a container shape to accommodate food therein; And a heat resistant coating layer formed by coating a heat resistant coating including diamond powder mixed with a coating composition selected from a group including an inorganic modified binder and a fluorine resin on an outer surface of the inner pot body, wherein the inorganic modified binder has its own weight. It provides a durable inner pot for the cooker, characterized in that it comprises 75 to 90% by weight of silica, 9 to 24% by weight of epoxy and 1 to 16% by weight of nano-inorganic particles.

Here, the diamond powder mixed in the heat-resistant paint is 1 to 16% by weight as 700 ~ 1200 mesh, the thickness of the heat-resistant coating layer is preferably made of 3 ~ 10 ㎛.

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In addition, it is preferable that the nickel plated layer plated with nickel strike is further included between the inner pot body outer surface and the heat resistant coating layer.

Through the above solution, the cooker durable internal pot of the present invention provides the following effects.

First, the cooker's durability-resistant inner pot according to the present invention is made of a coating material selected from the group including an inorganic modified binder and a fluorine resin as a main component, and is made of a heat resistant coating having excellent chemical resistance and heat resistance. This burning yellowing is prevented and the quality of the product is significantly improved.

Second, since the diamond powder is added to the heat-resistant coating is coated, the inner pot surface is strengthened, and scratches and fingerprints generated on the outer surface of the product can be prevented by the protruding fine particles of the diamond powder, thereby significantly improving the functionality of the product. Can be.

Third, since the yellowing phenomenon of the inner pot is prevented from burning, the durability of the inner pot is strengthened, and accordingly, the separation of the diamond powder and ceramic powder, which is harmful to the human body due to the peeling phenomenon of the coating solution, is prevented, so that the hygienic stability is remarkably improved. Can be.

1 is a cross-sectional view showing a cooker seated on the cooker durable internal pot for cooking according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing a durable inner pot for cooking according to a preferred embodiment of the present invention.
Figure 3 is a flow chart showing the coating process of the durable inner pot for cooking according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the durability-inner pot for cooking according to a preferred embodiment of the present invention.

1 is a cross-sectional view illustrating a cooker on which a durable internal pot 10 for cooking according to an embodiment of the present invention is seated.

As shown in FIG. 1, the cooker's durable internal pot 10 according to the present invention includes food and is placed on the main body 20 of the cooker 100 to be heated to cook food therein.

In addition, the inner pot heated inside the cooker 100 is closely related to the calorific value according to its shape and material, and since the taste, cooking time, and consumption of electricity are directly determined by the calorific value, the inner pot body ( The outer surface of 11) is preferably made by plating and coating treatment. In addition, it is preferable that the inner pot body 11 is made of a material such as aluminum.

Here, the durability-resistant inner pot 10 for cooking according to the present invention will be described with reference to FIG.

Figure 2 is a cross-sectional view showing a durable inner pot 10 for cooking according to a preferred embodiment of the present invention.

As shown in Figures 1 and 2, the cooker durable internal pot 10 includes an inner pot body 11 and the heat-resistant coating layer 15.

In detail, the inner pot body 11 is formed in a container shape so that food is accommodated therein, the heat-resistant coating layer 15 of the pigment 1 to 16% by weight and 700 to 1200 mesh on the outer surface of the inner pot body 11 Diamond powder 17 is made of a heat-resistant paint containing 1 to 16% by weight, it is made of a coating of 3 ~ 10 ㎛ thick.

Here, the heat-resistant paint may be made with a coating composition selected from the group consisting of an inorganic modified binder and a fluororesin as a main component.

In detail, the fluororesin is an organic caking additive, and the strength and heat resistance of the entire coating may be improved by applying an inorganic material, but may be applied to compensate for the lack of some elasticity. In addition, it is applied to double the adhesion and caking function as a material with high heat resistance, and it can increase the interlayer adhesion and binding strength with all materials. proper.

In addition, the fluorine resin may be applied as a function to compensate for the shortage of the inorganic caking material mainly on the binding strength of the organic synthetic caking material or inorganic material having a heat resistance of 300 ℃ or less. In addition, the excessive amount of the fluorine resin may cause problems in heat resistance, and in the case of a small amount, the lack of elasticity, adhesiveness, adhesion and bearing strength may be weakened.

On the other hand, the inorganic modified binder is composed of a binder mainly composed of silica, based on the weight of the inorganic modified binder 75 to 90% by weight of silica, 9 to 24% by weight of epoxy and 1 to 16% by weight of the inorganic inorganic particles It is preferable that further comprises.

Here, the silica is chemically stable as heat insulating material and has excellent heat resistance, and is preferably added in an amount of 75 to 90 wt% to add adhesion, hardness, void removal, thermal conductivity, and insulation property of the coating film. If the weight is less than 75% by weight, the coated coating is weak and the thickness of the coating is thin. When the weight is more than 90% by weight, the surface of the coating is not smooth.

In addition, the epoxy having excellent adhesion, less discoloration and excellent heat resistance and electrical properties is preferably made of 9 to 24% by weight. When the weight is less than 9% by weight, the adhesion of the coated coating film becomes weak and 24% by weight. If exceeded, there is a possibility that cracking of the coating film occurs due to a decrease in hardness and flexibility.

In addition, the nano-inorganic particles are preferably made of a ceramic powder excellent in corrosion resistance, heat resistance and abrasion resistance compared to metal materials and organic materials, the amount is preferably made of 1 to 16% by weight. In detail, when the amount thereof is less than 1% by weight, the strength of the coated coating film is weakened, and when the amount exceeds 16% by weight, the adhesion of the coating film may be lowered.

In addition, the pigment is to give a color to the cooker durable internal pot 10 is preferably made of at least any one of a nano-color pigments, gold powder, copper powder and Zion pigment discolored at 50 ~ 75 ℃. .

Here, the pigment is preferably made of 1 to 16% by weight, when the amount is less than 1% by weight it is difficult to expect the effect of the pigment, such as not appearing, when it exceeds 16% by weight of the heat-resistant paint coating layer It may affect the adhesiveness of (15), which may damage the outer surface.

In addition, even if the user does not touch the hot inner pot after cooking through the Zion pigment, the user can move the inner pot by knowing the appropriate temperature by sensing the color change.

In addition, the heat-resistant paint is preferably made of 1 to 16% by weight of the diamond powder 17 of 700 ~ 1200 mesh. The addition of the diamond powder 17 is to prevent scratches and fingerprints of the inner pot body 11, when described with reference to Table 1 as follows.

Thickness (㎛)
Mesh 500 mesh 700 mesh 900 mesh 1100 mesh 1200 mesh 1300 mesh 1500 mesh 2 μm Good Good Good Good Good Good Bad 3 μm Good Good Good Good Good Good Bad 4 μm Good Good Good Good Good Good Bad 6 ㎛ Good Good Good Good Good Good Bad 8 μm Good Good Good Good Good Good Bad 10 탆 Good Good Good Good Good Bad Bad 12 μm Good Good Good Bad Bad Bad Bad

Table 1 shows the fingerprint generation according to the particle size of the diamond powder 17 and the thickness of the heat resistant coating layer 15.

As shown in Table 1, when the thickness of the heat-resistant paint coating layer 15 is 10 ㎛ or less and when the diamond powder 17 is 1200 mesh or less, it appears that the fingerprint prevention effect. Here, when the thickness of the heat-resistant paint coating layer 15 is less than 3 ㎛ does not produce the effect of improving the thermal conductivity of the inner pot body 11 and the heat-resistant paint coating layer 15 is 3 to reduce the material cost of the coating layer It is preferably formed at ˜10 μm.

In addition, the diamond powder 17 has an anti-fingerprint effect when it is 1200 mesh or less based on the thickness of the heat-resistant paint coating layer 15, but when it is less than 700 mesh, the powder becomes larger and the bonding strength of the coating layer is lowered to cause peeling phenomenon. And a smooth coating may be difficult to obtain. In addition, if it exceeds 1200 mesh, it is difficult to disperse the powder and it may be difficult to expect the effect of anti-fingerprint on the outer surface of the heat resistant coating layer 15. Therefore, the diamond powder 17 is preferably made of 700 ~ 1200 mesh.

In addition, the diamond powder 17 is preferably made of 1 to 16% by weight is added, if the amount is less than 1% by weight it is difficult to expect the effect of the diamond and when added in excess of 16% by weight the heat-resistant The adhesion of the coating layer 15 may be reduced. In addition, the diamond powder 17 may be an artificial diamond powder to reduce the material cost.

On the other hand, the heat-resistant paint may be made of 3 to 18% by weight of tourmaline powder of 3000 ~ 5000 mesh. Here, the tourmaline powder may be added for the antibacterial effect, the active effect and the deodorizing effect is released far infrared rays and anions at room temperature without additional heating.

And, the tourmaline powder is preferably made of a particle size of 3000 ~ 5000 mesh, when the particle size is pulverized less than 3000 mesh, the particle size is large, uniform mixing in the heat-resistant paint coating layer 15 is lowered to the coating layer Cracks may occur, and if it exceeds 5000 mesh, the effect of emitting negative ions and far infrared rays may be reduced.

Meanwhile, a nickel plating layer 13 plated with nickel strike may be formed between the inner surface of the inner pot body 11 and the heat resistant coating layer 15.

In detail, the nickel plating layer 13 is formed by plating with a nickel strike on the inner surface of the inner pot body 11.

That is, the nickel plating layer 13 is made of nickel strike for 2 to 5 minutes at 18 ~ 25 ℃ to increase the adhesion of the inner pot body 11 and the heat-resistant coating layer 15. In other words, the nickel strike step is to form a strike liquid by mixing 120 g / l nickel chloride mixed with hydrochloric acid and nickel, 240 g / l hydrochloric acid, and water, and then striking the outer surface of the inner pot body 11 to the surface of aluminum. By forming an oxide film to enable the plating to be able to form a coating layer with good adhesion.

On the other hand, Table 2 is a table showing the yellowing phenomenon of the inner pot coated with a heat-resistant coating including a conventional urethane resin and the durability-resistant inner pot 10 for a cooker according to the present invention.

Time (hr) 10 hr 20 hr 30 hr 40 hr 50 hr 60 hr Urethane resin ○ ○ △ X X X Fluorine resin ○ ○ ○ ○ △ △ Mineral modified binder ○ ○ ○ ○ ○ △

[○: no change, △: slight yellowing detected, Ｘ: severe yellowing]

As shown in Table 2, the inner pot coated with the heat resistant paint including the urethane resin was continuously heated at a temperature of 150 ° C. or higher, and the change of the surface thereof was visually observed. As a result, the yellowing phenomenon was detected when the inner pot burned when heated for 40 hours or more.

In addition, when the inner pot coated with the heat-resistant coating containing the fluorine resin and the inorganic modified binder was heated under the above conditions and visually observed, it was found that a slight yellowing phenomenon occurred when the heating was performed for more than 50 to 60 hours. .

Through this, the cooker durability-enhanced inner pot 10 according to the present invention prevents yellowing caused by burning of the inner pot even at long time heating at high temperature to enhance the durability of the product, thereby peeling off the inner pot coating liquid By preventing the separation of the diamond powder and ceramic powder, such as harmful to the human body to prevent the remarkable improvement in hygienic stability as well as the effect of the additive of the coating liquid can be further improved.

In conclusion, the cooker durable internal pot 10 according to the present invention is made of a coating composition selected from the group comprising an inorganic modified binder and a fluorine resin as a main component is made of a coating of the heat-resistant coating having excellent chemical resistance and heat resistance at a high temperature The yellowing of the inner pot is prevented even after prolonged heating of the product, and the quality of the product is remarkably improved.

In addition, since the diamond powder is added to the heat-resistant paint, by preventing the scratches and fingerprints on the outer surface of the inner pot body 11 by the fine protruding particles of the diamond powder, the surface is strengthened can significantly improve the functionality of the product have.

In addition, Zion pigment which is discolored according to the temperature is added and coated so that the user can see the color and detect the temperature change without knowing the hot inner pot after cooking, so that the appropriate temperature can be noticeably improved in safety.

On the other hand, the coating process of the cooker durable reinforced inner pot 10 will be described with reference to FIG.

Figure 3 is a flow chart showing the coating process of the durable inner pot 10 for cooking according to a preferred embodiment of the present invention.

1 to 3, the coating process including the nickel plating layer 13 of the cooker durable internal pot 10 according to the present invention includes forming a nickel plating layer 13 and the nickel plating layer 13. ) And a heat-resistant coating step.

In detail, the step of forming the nickel plating layer 13 is first made by plating with a nickel strike on the outer surface of the inner pot body 11 degreased, neutralized and washed in a state of 18 ~ 25 ℃. Here, the inner pot body 11 requires a pretreatment (s201) before the plating process, first, by visual inspection to screen out the inner pot body 11 having a poor appearance and first sort the inner pot body 11 having a good appearance. Get to work.

Then, preliminary degreasing is performed at 40 to 45 ° C. for 2 to 4 minutes to remove oil and dust on the outer surface of the inner pot body 11, which is sorted, and washed with water. Here, electrolytic degreasing is carried out at 40 to 45 ° C. for 2 to 5 minutes as main degreasing to remove residues such as oil and foreign substances, and washing with water.

On the other hand, in the degreasing process, when the process temperature is less than 40 ℃, the activity of the degreasing liquid is low to achieve the desired degreasing effect, when the process temperature exceeds 45 ℃ it is difficult to properly control the process treatment time.

In addition, the outer surface of the inner pot body 11 is subjected to a neutralization process to pH 2 to 3 at room temperature. The neutralization process neutralizes and removes the plating interferences remaining on the outer surface of the inner pot body 11 and at the same time lightly etches the outer surface of the inner pot body 11 to have good adhesion to the outer surface of the inner pot body 11 made of aluminum. The nickel plating layer 13 can be formed.

After washing with water, the nickel plating layer 13 is formed by plating with a nickel strike (s202). Here, the nickel strike step is to form a strike solution by mixing the hydrochloric acid and nickel mixed nickel chloride, water, hydrochloric acid and then strike the outer surface of the inner pot body 11 to form an oxide film on the surface of aluminum to activate the plating It is to be able to form a coating layer having a good adhesion by making it possible.

The nickel plating layer 13 is preferably made for 2 to 5 minutes at 18 ~ 25 ℃. When the temperature is less than 18 ° C, the adhesion of the coating layer may be lowered. When the temperature exceeds 25 ° C, the plating layer may not be uniformly formed due to rapid plating progress.

In addition, the plating time of the nickel plating layer 13 is carried out for 2 to 5 minutes, the plating time is more than 2 minutes is sufficient, but when the time is less than 2 minutes it is difficult to expect the adhesive effect of the coating layer. Therefore, it is desirable to appropriately perform the plating time in consideration of the working situation. In addition, the nickel strike plating solution may be one having a pH of 1 to 2, and in order to prevent poor adhesion, it is preferable to appropriately form the thickness of the nickel plating layer.

Meanwhile, after the nickel plating layer 13 is formed and washed with water, the nickel plating layer 13 is made of electrically neutral pure water to prevent plating failure due to various ionic activities of the nickel plating layer 13. Clean the net).

Then, the preheating step for the coating of the heat-resistant paint (s203). In detail, the preheating step is preferably carried out at 30 ~ 50 ℃, if the preheating temperature is less than 30 ℃ flow phenomenon of the coating layer occurs and the gloss is lowered, if it exceeds 50 ℃ adhesive strength is reduced and the coating layer is uniform The problem of not forming can occur.

Here, the heat-resistant paint including the pigment, diamond powder 17 and tourmaline powder is coated on the preheated nickel plating layer 13 (s204). In addition, the heat-resistant coating may be composed of 80 to 95% by weight of the coating composition selected from the group comprising an inorganic modified binder and a fluororesin as a main component.

In detail, 1 to 16% by weight of the pigment, 1 to 16% by weight of the diamond powder (17) of 700 to 1200 mesh and 3 to 18% by weight of the tourmaline powder of 3000 to 5000 mesh are added to the heat-resistant paint and then mixed. On the outer surface of the nickel plating layer 13 is coated.

Specifically, the pigment is to give color to the cooker fortified inner pot 10 may comprise at least one of nano-color pigments, gold powder and copper powder.

Here, the pigment is preferably made of 1 to 16% by weight, when the amount is less than 1% by weight it is difficult to expect the pigment effect, such as not appearing the desired color, when it exceeds 16% by weight of the heat-resistant paint coating layer It may affect the adhesiveness of (15), which may damage the outer surface.

On the other hand, the pigment is preferably made of a Zion pigment which is discolored at 50 ~ 75 ℃. Here, the Zion pigment is a pigment that changes color with temperature, and as the temperature rises, the color begins to disappear, and when the temperature decreases, the Zion pigment returns to the original color and is harmless to the human body.

In addition, the Zion pigment has a color change color by temperature from -15 ° C to 65 ° C, there are pigments that change when the temperature rises from 20 ° C to 2 ° C, pigment grades varying at 31 ° C, 43 ° C, 65 ° C respectively.

In addition, the combination of two Zion pigments or a combination of Zion pigments and ordinary pigments can be obtained different colors, and the combination of three Zion pigments with a temperature difference can bring another result, such as different needs Can be applied to

Therefore, using the Zion pigment in the temperature range suitable for the present invention, the user can move the inner pot by detecting the temperature change and seeing the appropriate temperature without looking at the inner pot after cooking.

In addition, the heat-resistant paint is preferably made of 1 to 16% by weight of the diamond powder 17 of 700 ~ 1200 mesh.

Here, the diamond powder 17 is added to form a fine particle protruding from the coating layer for the scratch and anti-fingerprint effect of the inner pot body 11, when the particle size is less than 700 mesh, the bonding strength of the coating layer is reduced It can be difficult to obtain a smooth coating. And, if it exceeds 1200 mesh it is difficult to disperse the powder and it may be difficult to expect the effects of scratch and fingerprint prevention on the outer surface of the heat-resistant paint coating layer (15).

In addition, the diamond powder 17 is preferably made of 1 to 16% by weight is added, when the amount is less than 1% by weight it is difficult to expect the effect of scratch and anti-fingerprint of the diamond powder and exceeds 16% by weight The adhesion of the heat resistant coating layer 15 may be lowered.

In addition, the tourmaline powder added to the heat-resistant paint may be made of 3 to 18% by weight of 3000 to 5000 mesh. Here, the tourmaline powder is added for the antimicrobial, active and deodorizing effect of far infrared rays and anions are released at room temperature without additional heating.

When the tourmaline powder is pulverized to less than 3000 mesh particle size is large, the mixing force in the heat-resistant paint coating layer 15 is lowered may cause cracks in the coating layer. The release effect of may be lowered.

On the other hand, the heat-resistant coating layer 15 is preferably made of a thickness of 3 ~ 10 ㎛, the fine particles of the above-described diamond powder 17 protrudes and generates an effect of improving the thermal conductivity of the inner pot body 11 It is preferably coated with a thickness of 3 ~ 10 ㎛ to reduce the material cost of the coating layer.

In addition, when the heat-resistant paint is coated to improve the hardness and wear resistance of the coating layer, heat treatment is performed at 180 to 200 ° C. for 40 to 50 minutes (s205) to coat the cooker's durable internal pot 10.

As described above, the present invention is not limited to the above-described embodiments, but may be modified by those skilled in the art without departing from the scope of the claims of the present invention. Such modifications are within the scope of the present invention.

10: Durable inner pot for cooking
11: inner pot body
13: nickel plating layer
15: heat resistant coating layer
17: diamond powder
20: main body
100: cooker

Claims (5)

Inner pot body made of a container shape to accommodate food therein; And
Including the heat-resistant paint coating layer formed by coating the heat-resistant paint containing diamond powder mixed in the coating composition selected from the group comprising an inorganic modified binder and a fluorine resin on the outer surface of the inner pot body,
The inorganic modified binder is 75 ~ 90% by weight of silica and 9 ~ 24% by weight epoxy and 1 to 16% by weight of nano-inorganic particles based on its own weight. The method of claim 1,
The diamond powder mixed in the heat resistant paint is 700 to 1200 mesh as 1 to 16% by weight,
Durable inner pot for cooking, characterized in that the thickness of the heat-resistant coating layer is made of 3 ~ 10 ㎛. delete delete The method of claim 1,
Between the inner pot body outer surface and the heat-resistant coating layer is a nickel plated layer plated with a nickel strike further comprises a durable internal pot for cooking.

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