CN213721350U - Composite pot - Google Patents

Abstract

The utility model provides a composite pot, which comprises a composite pot body, wherein the composite pot body comprises a base layer and a strengthening layer which are arranged in a stacking way, the composite pot body is provided with a pot body end face, and at least one part of the pot body end face is composed of the base layer and the strengthening layer; the first protection layer is arranged on the end face of the pot body and covers the end face of the pot body. The utility model provides a compound pan, compound pot body has pot body terminal surface, at least one part of pot body terminal surface comprises base member layer and strengthening layer, be equipped with first protective layer on the pot body terminal surface of compound pan, first protective layer covers pot body terminal surface, can make the relatively poor pot body terminal surface of antirust property keep apart with external environment, the antirust property of compound pan in pot body terminal surface department has been promoted, the corrosion resistance of pot body terminal surface position compound pan in the in-service use process has also been ensured simultaneously, help prolonging the life of compound pan, promote the food security performance of compound pan.

Description

Composite pot

Technical Field

The utility model relates to a kitchen utensil technical field particularly, relates to a compound pan.

Background

At present, stainless fine iron pots on the market are mainly made of single-layer iron plates or steel plates, and then are subjected to rust prevention treatment in a nitriding mode. The cookware is made of the iron or steel material with the advantages of thin single layer and poor heat conducting property, so that the cookware has the problems of uneven heat conduction, easy generation of oil smoke and the like, and the user experience is poor. In order to improve the problems, refined iron pans made of two or more layers of composite materials, such as refined iron pans made of an iron-aluminum double-layer composite plate or an iron-aluminum-iron three-layer composite plate, appear in the industry, have the advantages of light weight, uniform temperature and less oil smoke, and are great progress of the industry technology. However, in the fine iron pan made of the iron-aluminum composite material, because the edge of the pan opening has a sharp corner part, a compact and anti-rust layer with enough thickness is difficult to generate at the part after nitriding; in addition, because an interlayer compound layer exists at the combined interface of the iron layer and the aluminum layer, the interlayer compound cannot be combined with nitrogen atoms to generate a nitriding antirust layer in the nitriding process, so that the antirust performance of the positions is poor, and the problems can cause that the pot opening position of the iron pot is easy to be rusted in the using process, and the service life of the product is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

One aspect of the utility model provides a compound pan.

In view of this, according to the utility model discloses an aspect provides a compound pan, includes: the composite pot comprises a composite pot body, wherein the composite pot body comprises a base body layer and a reinforcing layer which are arranged in a stacked mode, the composite pot body is provided with a pot body end face, and at least one part of the pot body end face is composed of the base body layer and the reinforcing layer; the first protection layer is arranged on the end face of the pot body and covers the end face of the pot body.

The embodiment of the utility model provides a compound pan, its compound pot body includes base member layer and strengthening layer, can promote the performance on solitary base member layer. The composite pot body is provided with a pot body end face, at least one part of the pot body end face is composed of a base body layer and a reinforcing layer, namely, the end face of the base body layer and the end face of the reinforcing layer form at least one part of the pot body end face. Be equipped with first protective layer on the pot body terminal surface of compound pan, first protective layer covers pot body terminal surface, can make the relatively poor pot body terminal surface of antirust property keep apart with external environment, has promoted the antirust property of compound pan in pot body terminal surface department, has also ensured the corrosion resistance of pot body terminal surface position compound pan in the in-service use simultaneously, helps prolonging the life of compound pan, promotes the food security performance of compound pan.

It can be understood that the composite pot is generally made into a pot shape by a composite plate formed by laminating iron and aluminum through processes of die drawing, spinning or hydraulic drawing and the like, the end surface of the base body layer, the end surface of the reinforcing layer and the end surface of the pot body are all edge surfaces of the composite plate (namely the section position of the iron and aluminum composite plate), and the end surface of the pot body is the end surface of the pot opening under the condition that the pot opening of the composite pot does not have a flanging; and under the condition that the pot opening of the composite pot is provided with a flanging, the end surface of the pot body is the end surface of the flanging.

Further, set up first protective layer through the edge face at the composite sheet and can compensate to carry out the rust-resistant not enough of nitriding alone to compound pan, promote compound pan holistic rust-resistant and corrosion resistance. Because the edge surface of the composite board has edges and corners, a thicker nitriding layer is difficult to form at the position, which is a common fault of the nitriding and rust-proof process of the prior iron pan, so that the nitriding layer is rusted easily due to abrasion at the position, and the mouth of the iron pan is rusted; secondly, an interlayer compound layer exists at the combined interface of the iron layer and the aluminum layer, and the interlayer compound cannot be combined with nitrogen atoms to generate a nitriding antirust layer in the nitriding process, so that the antirust performance of the positions is poor; in addition, because the aluminium lamination of iron-aluminum composite sheet cross-section position is naked, the corrosion resisting property of aluminium material is relatively poor, also is corroded by the corrosive substance of surrounding environment very easily, takes place corrosion to influence the life of pan.

Additionally, according to the utility model discloses above-mentioned technical scheme provides compound pan still has following additional technical characteristic:

in one possible design, the composite cookware further comprises: and the rust-proof layer covers the substrate layer.

In this design, further injectd compound pan still including the antirust coat that covers the base member layer, can provide reliable rust-resistant protection for the base member layer, reduced the corrosion of pan in the use, helped prolonging the life of compound pan.

In one possible design, the curing temperature of the first protective layer is equal to or lower than the oxidation treatment temperature of the rust preventive layer.

In the design, the curing temperature of the first protective layer is further limited to be less than or equal to the oxidation treatment temperature of the antirust layer, so that the problems that the appearance of the iron pan is discolored badly due to overhigh curing temperature, and a polishing procedure is needed to be added, so that the production cost is increased and the antirust performance is reduced can be solved. The reason for this is that: after nitriding and oxidation, the iron pan is processed by furnace solidification at the temperature higher than the oxidation treatment temperature of the anti-rust layer, and iron in the nitriding layer reacts with oxygen to generate blue-black Fe₃O₄The oxide layer can cause the surface of the iron pan to change color and lose the original luster, and the surface of the iron pan must be polished again to remove Fe₃O₄The oxide layer can restore the original appearance, thereby increasing the manufacturing process and the manufacturing cost, and the over-polishing can also thin the thickness of the nitriding layer, so that the rust-proof performance of the iron pan is reduced.

The oxidation treatment temperature of the rust-preventive layer is specifically: the composite pot body is subjected to rust prevention treatment by a nitriding processTemperature of oxidation and blackening treatment. Particularly, after the composite pot body is subjected to the anti-rust treatment by the nitriding process, the composite pot body can be subjected to oxidation and blackening treatment, and the effects of further improving the corrosion resistance, blocking the pores on the surface of the nitriding layer and forming Fe₃O₄The surface oxide layer of the ferric oxide ensures that the antirust layer is more compact and has better antirust performance. The blackening function is to make the surface of the cookware have dark appearance so as to improve the use problems that the light-colored cookware is easy to change color after being heated. Wherein the treatment temperature for oxidation and blackening is generally 350 to 450 ℃.

In one possible design, a part of the rust preventive layer is located between the end face of the substrate layer and the first protective layer, and the rust preventive layer covers the end face of the substrate layer.

In this design, a part of antirust coat is located between terminal surface and the first protective layer of base member layer, and the antirust coat covers the terminal surface of base member layer, also promptly, carry out the nitriding treatment to compound pot body earlier, make be formed with the antirust coat on the terminal surface of base member layer, play preliminary rust-resistant effect, and then set up first protective layer on the pot body terminal surface after the nitriding treatment, make the terminal surface position of base member layer have dual rust-resistant protection, the antirust property of compound pan in pot body terminal surface department has further been promoted, the corrosion resistance of pot body terminal surface position at the compound pan of in-service use has also been ensured simultaneously, help prolonging the life of compound pan, promote the food security performance of compound pan.

In one possible design, the thickness of the rust preventive layer covering the end face of the base layer is smaller than the thickness of the rust preventive layer located on the side wall or the bottom wall of the composite pot body.

In this design, the thickness of the antirust coat that has further injectd the terminal surface that covers the base member layer is less than the thickness of the antirust coat that is located the lateral wall of compound pot body or diapire, that is, the thickness of the antirust coat of pot mouth department is less than the thickness of the antirust coat of the lateral wall of compound pot body or diapire department, thereby can provide certain anticorrosion effect in pot mouth department, and, to the antirust coat for nitriding layer or spraying layer, the antirust coat has certain hole, can further improve the cohesion between first protective layer and base member layer and the strengthening layer, and the processing technology degree of difficulty of antirust coat has been reduced, and the production efficiency is improved.

In one possible design, the composite cookware further comprises: and the second protective layer is arranged on the outer side of the strengthening layer and covers the strengthening layer.

In this design, further injectd compound pan and still included the second protective layer, the second protective layer setting just covers the strengthening layer in the outside of strengthening layer, for the strengthening layer provides reliable rust-resistant protection, reduces the corrosion of pan in the use, helps prolonging the life of compound pan.

In one possible design, the first protective layer is connected to the second protective layer.

In the design, the first protective layer is further limited to be connected with the second protective layer, the isolation of the pot body end face with poor antirust performance and the strengthening layer from the external environment is further ensured, and more reliable antirust protection is provided for the strengthening layer and the pot body end face.

In one possible design, the second protective layer includes one or a combination of: fine iron layer, organic silicon coating, fluorine coating and spray metal layer.

In this design, the second protective layer can be the smart iron layer, and then constitutes indisputable three-layer composite board structure of iron-aluminum-iron or indisputable three-layer composite board structure of iron-copper, helps promoting the performance of smart iron pan. The second protective layer can also be a coating, including but not limited to a silicone coating, a fluorine coating, a sprayed metal layer (e.g. a sprayed titanium layer, etc.) which has stable performance and is not easy to react with salt), so as to play a role in protecting the reinforcing layer and improving the corrosion resistance of the composite cookware.

In one possible design, the substrate layer comprises a fine iron layer.

In the design, the material of the composite pot body is limited. The base member layer can be the smart iron sheet, correspondingly, the embodiment of the utility model provides a compound pan is for the improvement to the smart iron pan in the correlation technique.

In one possible design, the curing temperature of the first protective layer is 380 ℃ or less.

In this design, it is further limited that the curing temperature of the first protection layer is not more than 380 ℃, specifically, the first protection layer uses an organosilicon paint or a fluorine paint with the curing temperature of not more than 380 ℃, which can avoid the problems that the appearance of the iron pan is discolored badly due to too high curing temperature, and the polishing process needs to be added, thereby leading to the increase of production cost and the reduction of rust-proof performance, and the reason is that: the nitrided iron pan is passed through a furnace for solidification at the temperature higher than 380 ℃, and iron elements in the nitrided layer react with oxygen to generate bluish-black Fe₃O₄The oxide layer can cause the surface of the iron pan to change color and lose the original luster, and the surface of the iron pan must be polished again to remove Fe₃O₄The oxide layer can restore the original appearance, thereby increasing the manufacturing process and the manufacturing cost, and the over-polishing can also thin the thickness of the nitriding layer, so that the rust-proof performance of the iron pan is reduced.

In one possible design, the strengthening layer comprises one or a combination of: an aluminum layer and a copper layer; and/or the first protective layer comprises one or a combination of the following: organosilicon coating, fluorine coating, spraying metal layer.

In the design, the material of the composite pot body is limited. The strengthening layer can be the aluminium lamination, also can be the copper layer, and compound pot body can be made by iron-aluminum composite sheet promptly, also can make by iron-copper composite sheet, all can promote the performance of smart iron pan, can avoid aluminium lamination or copper layer to be corroded by nitriding medium or other corrosive substance in the use simultaneously. The first protective layer can be a coating, including but not limited to a silicone coating, a fluorine coating, a sprayed metal layer (e.g., a sprayed titanium layer, etc.), which has stable performance and is not easy to react with salt, so as to protect the end face of the pot body and improve the corrosion resistance of the composite pot.

In one possible design, the number of the substrate layers is at least one, and the number of the strengthening layers is less than or equal to the number of the substrate layers.

In this design, the quantity on base member layer is one or more, and the quantity less than or equal to base member layer of strengthening layer's quantity, specifically, the inlayer of compound pot body is the base member layer, also promptly, cooks the in-process and is the base member layer with the layer of eating material direct contact, because the base member layer generally is smart iron sheet, is favorable to promoting the food security of compound pan. Further, in the case where the number of the base layers is plural, the base layers and the reinforcing layers are alternately distributed.

In one possible design, the rust preventive layer comprises a nitriding rust preventive layer.

In this design, the antirust coat specifically is the nitridation antirust coat, and the nitridation antirust coat has good corrosion protection, can ensure that compound pan can not take place the corrosion in the use, has prolonged the life of compound pan, has promoted use experience.

In one possible design, the thickness of the rust preventive layer is 10 μm or more and 40 μm or less.

In this design, the thickness of the rust preventive layer is 10 μm or more and 40 μm or less. Within the thickness range, the anti-rust layer has good anti-corrosion performance, on one hand, the problem that the anti-corrosion performance of the anti-rust layer is insufficient due to the fact that the thickness of the anti-rust layer is too small and is smaller than 10 mu m is solved, and on the other hand, the problems that the anti-rust performance is excessive due to the fact that the thickness of the anti-rust layer is too large and is larger than 40 mu m, and the problems that nitriding treatment time is too long, the anti-rust performance is excessive, the manufacturing cost is increased, the competitiveness.

Additional aspects and advantages in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic view of a forming structure of a composite pot body of a composite pot tool according to an embodiment of the present invention;

FIG. 2 shows a partial enlarged view of FIG. 1 at section A of one embodiment of the present invention;

fig. 3 shows a schematic structural diagram of the composite pot body of the composite pot tool of an embodiment of the present invention after nitriding and rust prevention;

FIG. 4 shows a partial enlarged view of FIG. 3 at section B of an embodiment of the present invention;

fig. 5 shows a schematic structural diagram of the composite pan body of the composite pan according to an embodiment of the present invention after the first protective layer is disposed;

FIG. 6 shows a partial enlarged view of FIG. 5 at section C of an embodiment of the present invention;

fig. 7 is a schematic view showing a forming structure of a composite pot body of a composite pot according to another embodiment of the present invention;

fig. 8 shows a partial enlarged view of fig. 7 at section D of another embodiment of the present invention;

fig. 9 shows a schematic structural diagram of a composite pan body of a composite pan according to another embodiment of the present invention after a second protective layer is disposed;

fig. 10 shows a partial enlarged view of fig. 9 at section E of another embodiment of the present invention;

fig. 11 shows a schematic structural diagram of a composite pan body of a composite pan according to another embodiment of the present invention after nitriding and rust prevention;

fig. 12 shows a partial enlarged view of fig. 11 at section F of another embodiment of the present invention;

fig. 13 is a schematic structural view of a composite pan body of a composite pan according to another embodiment of the present invention after a first protective layer is disposed;

fig. 14 is a partial enlarged view of a portion G of fig. 13 showing another embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 14 is:

100 composite cookware, 110 composite cookware body, 112 cookware body end face, 114 base layer, 116 reinforcing layer, 120 first protective layer, 130 antirust layer and 140 second protective layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A composite cookware 100 provided according to some embodiments of the present invention is described below with reference to fig. 1 to 14.

Example one

As shown in fig. 5, 6, 13 and 14, an embodiment of an aspect of the present invention provides a composite pot 100, the composite pot 100 includes a composite pot body 110, the composite pot body 110 is composed of a base layer 114 and a reinforcing layer 116 which are stacked, the composite pot body 110 has a pot body end surface 112, at least a portion of the pot body end surface 112 is composed of the base layer 114 and the reinforcing layer 116; the first protection layer 120 is disposed on the pan body end surface 112, and the first protection layer 120 covers the pan body end surface 112.

The embodiment of the utility model provides a compound pan 100, its compound pot body 110 includes base member layer 114 and strengthening layer 116, can promote solitary base member layer 114's performance. The composite pan body 110 has a pan body end surface 112, and at least a portion of the pan body end surface 112 is formed by a base layer 114 and a reinforcing layer 116, that is, the end surface of the base layer 114 and the end surface of the reinforcing layer 116 form at least a portion of the pan body end surface 112. Be equipped with first protection layer 120 on the pot body terminal surface 112 of compound pan 100, first protection layer 120 covers pot body terminal surface 112, can make the relatively poor pot body terminal surface 112 of antirust property keep apart with external environment, the antirust property of compound pan 100 in pot body terminal surface 112 department has been promoted, the corrosion resistance of compound pan 100 in the in-service use in-process of pot body terminal surface 112 position has also been ensured simultaneously, help prolonging the life of compound pan 100, promote the food security performance of compound pan 100.

It can be understood that the composite pot 100 is generally made into a pot shape by a composite plate formed by laminating iron and aluminum through processes of die drawing, spinning or hydraulic drawing, and the like, the end surface of the base layer 114, the end surface of the reinforcing layer 116, and the end surface 112 of the pot body are all edge surfaces of the composite plate (i.e. the cross-sectional position of the iron and aluminum composite plate), and the end surface 112 of the pot body is the end surface of the pot mouth under the condition that the pot mouth of the composite pot 100 does not have a flanging; in the case that the pot mouth of the composite pot 100 has a flange, the end surface 112 of the pot body should be a flange.

Further, set up first protective layer 120 through the edge face at the composite sheet and can compensate to carry out the rust-resistant not enough of nitriding alone to compound pan 100, promote compound pan 100 holistic antirust property and corrosion resistance. Because the edge surface of the composite board has edges and corners, a thicker nitriding layer is difficult to form at the position, which is a common fault of the nitriding and rust-proof process of the prior iron pan, so that the nitriding layer is rusted easily due to abrasion at the position, and the mouth of the iron pan is rusted; secondly, an interlayer compound layer exists at the combined interface of the iron layer and the aluminum layer, and the interlayer compound cannot be combined with nitrogen atoms to generate a nitriding antirust layer 130 in the nitriding process, so that the antirust performance of the positions is poor; in addition, because the aluminium lamination of iron-aluminum composite sheet cross-section position is naked, the corrosion resisting property of aluminium material is relatively poor, also is corroded by the corrosive substance of surrounding environment very easily, takes place corrosion to influence the life of pan.

It is contemplated that additional layer structures may be added between the base layer 114 and the reinforcement layer 116 to form a multi-layer composite structure, as will also be apparent to those skilled in the art, and as an implementation of the present invention.

Further, as shown in fig. 3, 4, 11 and 12, the composite pot 100 further includes an anti-rust layer 130 covering the base layer 114, which can provide reliable anti-rust protection for the base layer 114, reduce corrosion of the pot during use, and help to prolong the service life of the composite pot 100.

Further, the curing temperature of the first protection layer 120 is less than or equal to the oxidation treatment temperature of the anti-rust layer 130, which can avoid bad color change of the appearance of the iron pan caused by over-high curing temperature and increase of polishing toolsThereby causing problems of an increase in production cost and a decrease in rust inhibitive performance. The reason for this is that: after nitriding and oxidation, the iron pan is processed by furnace solidification at the temperature higher than the oxidation treatment temperature of the anti-rust layer, and iron in the nitriding layer reacts with oxygen to generate blue-black Fe₃O₄The oxide layer can cause the surface of the iron pan to change color and lose the original luster, and the surface of the iron pan must be polished again to remove Fe₃O₄The oxide layer can restore the original appearance, thereby increasing the manufacturing process and the manufacturing cost, and the over-polishing can also thin the thickness of the nitriding layer, so that the rust-proof performance of the iron pan is reduced.

The oxidation treatment temperature of the rust-preventive layer 130 is specifically: the composite pot body 110 is subjected to oxidation and blackening after being subjected to rust prevention treatment through a nitriding process. Specifically, after the composite pan body 110 is subjected to the rust prevention treatment by the nitriding process, the composite pan body may be subjected to oxidation and blackening treatments for further improving the corrosion resistance, blocking the pores on the surface of the nitriding layer, and forming Fe-containing particles₃O₄The surface oxidation layer of the type iron oxide ensures that the antirust layer 130 is more compact and has better antirust performance. The blackening function is to make the surface of the cookware have dark appearance so as to improve the use problems that the light-colored cookware is easy to change color after being heated. Wherein the treatment temperature for oxidation and blackening is generally 350 to 450 ℃.

Further, as shown in fig. 3, 4, 11 and 12, a part of the rust-preventive layer 130 is located between the end surface of the base layer 114 and the first protective layer 120, and the rust-preventive layer 130 covers the end surface of the base layer 114, that is, the composite pot body 110 is nitrided first, so that the rust-preventive layer 130 is formed on the end surface of the base layer 114, and a primary rust-preventive effect is achieved, and then the first protective layer 120 is arranged on the pot body end surface 112 subjected to nitriding treatment, so that the end surface position of the base layer 114 has dual rust-preventive protection, further improving the rust-preventive performance of the composite pot 100 at the pot body end surface 112, and simultaneously ensuring the corrosion resistance of the composite pot 100 in the actual use process of the pot body end surface 112, which is helpful to prolong the service life of the composite pot 100, and improving the food safety performance of the composite pot 100.

Further, the thickness of the anti-rust layer 130 covering the end surface of the substrate layer 114 is smaller than the thickness of the anti-rust layer 130 located on the side wall or the bottom wall of the composite pan body 110, that is, the thickness of the anti-rust layer 130 at the pan opening is smaller than the thickness of the anti-rust layer 130 at the side wall or the bottom wall of the composite pan body, so that a certain anti-corrosion effect can be provided at the pan opening, and for the anti-rust layer 130 being a nitriding layer or a spraying layer, the anti-rust layer 130 has a certain pore space, so that the binding force between the first protection layer 120 and the substrate layer 114 and the strengthening layer 116 can be further improved, the difficulty of the processing technology of the anti-rust layer 130 is reduced, and the production efficiency is improved.

Example two

On the basis of the first embodiment, the second embodiment provides a composite pot 100, as shown in fig. 1, fig. 2, fig. 9 and fig. 10, the composite pot 100 further includes a second protective layer 140 disposed on the outer side of the reinforcing layer 116, and the second protective layer 140 covers the reinforcing layer 116, so as to provide reliable rust protection for the reinforcing layer 116, reduce corrosion of the pot in the using process, and help to prolong the service life of the composite pot 100.

Further, as shown in fig. 5, 6, 13 and 14, the first protective layer 120 is connected to the second protective layer 140. Further, the pot body end face 112 and the strengthening layer 116 with poor antirust performance are ensured to be isolated from the external environment, and more reliable antirust protection is provided for the strengthening layer 116 and the pot body end face 112.

Specifically, the first protection layer 120 can cover the end face of the second protection layer 140, so as to ensure that there is no gap at the joint of the first protection layer 120 and the second protection layer 140, and provide more reliable rust protection for the strengthening layer 116 and the pan body end face 112. It should be noted that, as shown in fig. 5 and fig. 6, in the case that the second protection layer 140 is a fine iron layer, the fine iron layer is provided with the rust-preventive layer 130, and the fine iron layer and the rust-preventive layer 130 together form the second protection layer 140 connected to the first protection layer 120.

Further, the second protective layer 140 includes one or a combination of the following: fine iron layer, organic silicon coating, fluorine coating and spray metal layer.

In one embodiment, as shown in fig. 3, 4, 5 and 6, the second protection layer 140 can be a refined iron layer, thereby forming an iron-aluminum-iron three-layer composite plate structure or an iron-copper-iron three-layer composite plate structure, which is helpful to improve the usability of the refined iron pan. The process flow corresponding to the above embodiment sequentially comprises: the composite pot body is shaped → sanded and cleaned → nitrided and oxidized → sanded and cleaned → the end face 112 of the pot body is provided with the first protective layer 120 → is cured through the furnace. The following embodiment five will be described with reference to specific configurations.

It can be understood that, in the case that the second protection layer 140 is a refined iron layer, the rust-proof layer 130 is disposed on the refined iron layer, and the rust-proof layer 130 can provide reliable rust-proof protection for the refined iron layer, thereby reducing the corrosion of the cookware in the using process and being beneficial to prolonging the service life of the composite cookware 100.

In another embodiment, as shown in fig. 9, 10, 11 and 12, the second protective layer 140 can also be a coating, including but not limited to a silicone coating, a fluorine coating, a sprayed metal layer (e.g., a sprayed titanium layer, etc., which is stable and is not easily reactive with salt), to protect the reinforcing layer 116 and improve the corrosion resistance of the composite cookware 100. The process flow corresponding to the above embodiment sequentially comprises: forming the composite pan body → sanding and cleaning → arranging a second protective layer 140 on the outer side surface of the composite pan body → furnace curing → sanding and cleaning → nitriding and oxidizing → sanding and cleaning → arranging a first protective layer 120 on the end surface 112 of the pan body → furnace curing. The following sixth embodiment will be described with reference to specific configurations.

EXAMPLE III

On the basis of the first or second embodiment, the third embodiment provides a composite pot 100, which specifically limits the material of the composite pot body 110. As shown in fig. 1, fig. 2, fig. 7 and fig. 8, the base layer 114 may be a fine iron layer, and accordingly, the composite pot 100 provided by the embodiment of the present invention is an improvement of the fine iron pot in the related art.

Further, the curing temperature of the first protection layer 120 is 380 ℃ or lower, and specifically, the first protection layer 120 uses an organosilicon coating or a fluorine coating with the curing temperature of 380 ℃ or lower, so that the iron pan can be prevented from being curedThe reason why the temperature is too high and the appearance is discolored badly and the polishing process is required to be increased, which causes the problems of the increase of the production cost and the reduction of the rust-proof performance is that: the nitrided iron pan is passed through a furnace for solidification at the temperature higher than 380 ℃, and iron elements in the nitrided layer react with oxygen to generate bluish-black Fe₃O₄The oxide layer can cause the surface of the iron pan to change color and lose the original luster, and the surface of the iron pan must be polished again to remove Fe₃O₄The oxide layer can restore the original appearance, thereby increasing the manufacturing process and the manufacturing cost, and the over-polishing can also thin the thickness of the nitriding layer, so that the rust-proof performance of the iron pan is reduced.

Further, the strengthening layer 116 can be an aluminum layer and can also be a copper layer, that is, the composite pan body 110 can be made of an iron-aluminum composite plate and can also be made of an iron-copper composite plate, so that the use performance of the fine iron pan can be improved, and meanwhile, the aluminum layer or the copper layer can be prevented from being corroded by nitriding media or other corrosive substances in use. The first protective layer 120 may be a coating, including but not limited to a silicone coating, a fluorine coating, a sprayed metal layer (e.g., a metal coating such as a sprayed titanium layer that has stable properties and is not easily reacted with salt), so as to protect the pot body end surface 112 and improve the corrosion resistance of the composite pot 100.

Specifically, the first protective layer 120 and/or the second protective layer 140 use an organosilicon paint or a fluorine paint with a curing temperature of less than 380 ℃, which can avoid the problems of poor appearance discoloration of the iron pan due to high temperature, increased polishing process, increased production cost and reduced rust-proof performance, and is caused by: the nitrided iron pan is passed through a furnace for solidification at the temperature higher than 380 ℃, and iron elements in the nitrided layer react with oxygen to generate bluish-black Fe₃O₄The oxide layer can cause the surface of the iron pan to change color and lose the original luster, and the surface of the iron pan must be polished again to remove Fe₃O₄The oxide layer can restore the original appearance, thereby increasing the manufacturing process and the manufacturing cost, and the over-polishing can also thin the thickness of the nitriding layer, so that the rust-proof performance of the iron pan is reduced.

Further, the number of the base layer 114 is one or more, and the number of the reinforcing layer 116 is less than or equal to the number of the base layer 114, specifically, the innermost layer of the composite pan body 110 is the base layer 114, that is, the layer directly contacting with the food material during the cooking process is the base layer 114, and since the base layer 114 is generally a fine iron layer, the food safety of the composite pan 100 is improved. Further, in the case where the number of the base layers 114 is plural, the base layers 114 and the reinforcing layers 116 are alternately distributed.

Example four

In any of the above embodiments, the rust-preventive layer 130 is specifically a nitriding rust-preventive layer 130, and the nitriding rust-preventive layer 130 has good corrosion resistance, so that the composite cookware 100 cannot be rusted in the using process, the service life of the composite cookware 100 is prolonged, and the use experience is improved.

Specifically, a liquid nitriding process, a gas nitriding process or an ion nitriding process can be adopted. The liquid nitriding process can generate a denser rust-proof layer 130 with larger thickness on the surface of the iron layer compared with a gas nitriding process or an ion nitriding process, so that the refined iron pan has more excellent rust-proof performance.

Further, the thickness of the rust preventive layer 130 is 10 μm or more and 40 μm or less. Within the thickness range, the anti-corrosion layer 130 has good anti-corrosion performance, on one hand, the problem that the anti-corrosion performance of the anti-corrosion layer 130 is insufficient due to the fact that the thickness of the anti-corrosion layer 130 is too small and is smaller than 10 micrometers is solved, and on the other hand, the problem that the anti-corrosion performance is excessive due to the fact that the thickness of the anti-corrosion layer 130 is too large and is larger than 40 micrometers, and the problem that the anti-corrosion performance is too long and is excessive, the manufacturing cost is increased, the competitiveness of products is reduced, the production waste is caused, and the like are solved.

EXAMPLE five

The fifth embodiment provides a composite pot 100, the composite pot body is specifically made of an iron-aluminum-iron three-layer composite plate, and the composite pot 100 provided by the fifth embodiment is described below according to the process flow.

1. Forming a composite pot body: as shown in fig. 1 and 2, the iron-aluminum-iron composite plate is manufactured into a pot shape through processes such as die drawing, spinning or hydraulic drawing, and the like, and the excess material at the mouth of the pot is usually removed through processes such as die trimming or special lathe edge. The composite layer of the composite pot body is respectively a base layer 114, a reinforcing layer 116 and a second protective layer 140 from inside to outside, wherein the base layer 114 and the second protective layer 140 are iron layers, specifically, fine iron layers, and the reinforcing layer 116 is an aluminum layer.

2. Sanding and cleaning: as shown in fig. 1 and 2, before nitriding treatment, the composite pan body 110 needs to be sanded and cleaned to remove iron chips, impurities, scratches, bruises and other defects on the surface of the composite pan body 110, otherwise, a continuous and dense nitriding layer cannot be generated at the defect position, and the defect position is easy to corrode in actual use, so that the service life of the product is shortened.

3. Nitriding and oxidizing: as shown in fig. 3 and 4, for the composite pot body made of the ferrous material or the low carbon steel material, the rust prevention treatment is generally performed by the nitriding process. Through nitriding treatment, respectively generate the one deck nitriding layer on the inside and outside iron layer surface of compound pot body 110, the nitriding layer has good corrosion resisting property, can ensure that the pan can not take place the corrosion in the use, has prolonged the life of pan, has promoted the use and has experienced.

Optionally, the rust inhibiting treatment may be performed with one of liquid nitriding, gas nitriding, or ion nitriding.

The liquid nitriding process is adopted for carrying out rust prevention treatment, so that the rust prevention performance is better, and compared with gas nitriding or ion nitriding, the liquid nitriding can generate a more compact rust prevention layer 130 with larger thickness on the surface of an iron layer, so that the refined iron pan has more excellent rust prevention performance.

Optionally, for the iron-aluminum-iron composite plate material, nitriding treatment is carried out at the temperature of 540-580 ℃, so that a compact nitriding layer with enough thickness can be formed on the surface of the iron layer after nitriding treatment, and the delamination defect of the iron layer and the aluminum layer due to overhigh nitriding temperature can be avoided.

Optionally, the nitriding time is 5-12 hours; the nitriding time is less than 5 hours, and an anti-rust layer 130 with enough thickness and density cannot be generated on the surface of the iron layer, so that the pot has poor anti-rust performance; the nitriding time is longer than 12 hours, and the nitriding time is too long, so that the manufacturing cost is increased, the competitiveness of the product is reduced, and the production waste is caused.

Optionally, the thickness of the anti-corrosion layer 130 generated by the nitriding treatment is 10 μm to 40 μm, and in this thickness range, the anti-corrosion layer 130 has good corrosion resistance, so that on one hand, the problem that the anti-corrosion layer 130 has insufficient corrosion resistance due to the fact that the thickness of the anti-corrosion layer 130 is too small and smaller than 10 μm is avoided, and on the other hand, the problem that the anti-corrosion layer 130 has excessive thickness and larger than 40 μm, which causes the excessively long nitriding treatment time, causes the excessive corrosion resistance, increases the manufacturing cost, reduces the competitiveness of the product, causes production waste, and the like is also avoided.

Optionally, oxidation and blackening treatments are required after nitriding, which are used for further improving the corrosion resistance, blocking the pores on the surface of the nitriding layer and forming Fe₃O₄The surface oxidation layer of the type iron oxide ensures that the antirust layer 130 is more compact and has better antirust performance. The blackening function is to make the surface of the cookware have dark appearance so as to improve the use problems that the light-colored cookware is easy to change color after being heated.

Optionally, the oxidation and blackening are carried out at 350-450 ℃, and the treatment time is 1-3 hours.

4. Sanding and cleaning: before the first protective layer 120 is disposed on the end surface 112 of the pan body, the end surface 112 of the pan body needs to be sanded and cleaned to remove impurities on the end surface 112 of the pan body, so that the end surface 112 of the pan body has a larger roughness, thereby improving the adhesion of the protective layer.

5. The pan body end surface 112 is provided with a first protection layer 120: as shown in fig. 5 and 6, the first protection layer 120 may be disposed on the end surface 112 of the pan body (i.e. the cross section of the iron-aluminum-iron composite plate at the pan mouth) by means of manual coating, automatic coating, gas spraying or electrostatic spraying. The first protective layer 120 can effectively cover the exposed surface of the thin nitriding layer, the poor antirust part, the interlayer compound layer part of the bonding interface of the iron layer and the aluminum layer on the composite pan body 110, so that the parts are isolated from corrosive substances in the air and the surrounding environment, and the antirust performance of the iron pan is improved.

The first protective layer 120 is arranged in a manual coating and automatic equipment coating mode, so that the method has the advantages of simplicity and quickness, and can simplify the production flow and reduce the production cost.

The first protective layer 120 is provided by gas spraying or electrostatic spraying, which has high production efficiency, but needs to cover the surface of the cookware inside and outside without spraying through the fixture.

6. And (3) furnace curing: as shown in fig. 5 and 6, the pot with the first protection layer 120 on the end surface 112 of the pot body is placed in a curing oven for high temperature heating, so that the first protection layer 120 is cured.

Alternatively, an organic silicon coating or a fluorine coating having a curing temperature of less than 380 ℃ is selected as the material of the first protective layer 120 because: the refined iron pan after nitriding treatment and oxidation blackening treatment has a black nitriding antirust layer 130 formed on the surface, the component of the black nitriding antirust layer is mainly iron nitride, when the iron pan is subjected to a high temperature of 380 ℃, iron elements in the nitriding layer can react with oxygen in the air to generate bluish black Fe₃O₄Oxide layer, higher temperature, Fe produced₃O₄The thicker the oxide layer is, the more the original black nitrided rust-preventive layer 130 is discolored and loses its original gloss, and the appearance of the product is poor, and the surface of the iron pan must be repolished to remove Fe₃O₄The oxide layer can restore original outward appearance, and this must lead to manufacturing procedure increase, manufacturing cost to rise, influences the competitiveness of product, and secondly, excessive polishing is polished and is still can be made the thickness attenuation of nitriding layer, makes the rust-resistant performance of iron pan reduce.

Optionally, a transparent silicone coating or a fluorine coating is selected as the material of the first protective layer 120, and the transparent coating is not easily recognized after being sprayed, so that the overall appearance of the cookware is not affected, and the cookware is more acceptable to consumers.

EXAMPLE six

The sixth embodiment provides a composite pot 100, which is similar to the fifth embodiment, wherein the composite pot body is specifically made of an iron-aluminum two-layer composite plate, and the composite pot 100 provided by the present embodiment is described below according to a process flow.

1. Forming a composite pot body: the specific process is the same as that of the fifth step 1 of the embodiment. The difference from the fifth embodiment lies in that the composite pan body material, as shown in fig. 7 and 8, the composite layer of the composite pan body is respectively a base layer 114 and a reinforcing layer 116 from inside to outside, wherein the base layer 114 is an iron layer, specifically a fine iron layer, and the reinforcing layer 116 is an aluminum layer.

2. Sanding and cleaning: before the protective layer is arranged on the outer side face of the pot, the outer side face of the pot is sanded or sanded so as to improve the adhesive force when the coating or metal is sprayed in the subsequent process.

3. The outer side surface of the composite pan body is provided with a second protective layer 140: as shown in fig. 9 and 10, before the nitriding treatment, a second protective layer 140 is disposed on the surface of the aluminum layer of the composite pot body, so as to avoid corrosion of the aluminum layer by the treatment liquid used in the nitriding treatment and the oxidation treatment during the nitriding treatment and the oxidation treatment, and to avoid surface defects of the pot product, especially for the liquid nitriding process, the aluminum layer can be prevented from reacting with the salt solution used in the liquid nitriding.

Alternatively, the second protective layer 140 may be provided by means of a gas spray or an electrostatic spray coating, which is less expensive to manufacture.

Alternatively, the second protective layer 140 may be provided by protecting a metal layer by means of thermal spraying, cold spraying, electroplating or electroless plating.

4. And (3) furnace curing: and placing the iron pan provided with the second protective layer 140 into a curing oven for high-temperature heating to cure the second protective layer 140.

5. Sanding and cleaning: after high-temperature curing, an oxide layer is generated on the surface of the iron layer of the iron pan, which can affect the reaction effect of nitrogen atoms and iron atoms during nitriding treatment, so that sanding is needed before nitriding treatment, the oxide layer generated on the surface of the iron layer can be thoroughly removed, and nitriding can be normally performed.

6. Nitriding and oxidizing: the specific process is the same as that of the fifth step 3 of the embodiment. The difference from the fifth embodiment lies in the material of the composite pan body, as shown in fig. 9 and 10, the composite layers of the composite pan body are an iron layer and an aluminum layer from inside to outside respectively. As shown in fig. 11 and 12, a rust preventive layer 130 is formed on the surface of the iron layer inside the pot by nitriding treatment, so that the inner surface of the pot has good corrosion resistance. It can be understood that the nitriding antirust layer 130 is also formed at the end face position of the iron-aluminum composite plate at the pot opening, but the thickness is insufficient due to the edge angle of the edge of the end face 112 of the pot body, and the antirust performance is poor.

It can be understood that, during the nitriding process, the aluminum layer is not corroded because the aluminum layer surface of the outer side surface is provided with the second protective layer 140.

7. Sanding and cleaning: before the first protective layer 120 is disposed on the end surface 112 of the pan body, the end surface 112 of the pan body needs to be sanded and cleaned to remove impurities on the end surface 112 of the pan body, so that the end surface 112 of the pan body has a larger roughness, thereby improving the adhesion of the protective layer.

8. The pan body end surface 112 is provided with a first protection layer 120: as shown in fig. 13 and 14, the first protective layer 120 may be disposed on the end surface 112 of the pan body (i.e. the cross section of the iron-aluminum-iron composite plate at the pan mouth) by means of manual coating, automatic coating, gas spraying or electrostatic spraying. The specific process is the same as that of step 5 in the fifth embodiment, and details are not repeated herein.

9. And (3) furnace curing: as shown in fig. 13 and 14, the pot with the first protective layer 120 on the end surface 112 of the pot body is put into a curing oven and heated at a high temperature to cure the first protective layer 120. The specific process is the same as that of step 6 in the fifth embodiment, and details are not repeated herein.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. The utility model provides a compound pan, its characterized in that, compound pan includes:

the composite pot comprises a composite pot body, wherein the composite pot body comprises a base body layer and a reinforcing layer which are arranged in a stacked mode, the composite pot body is provided with a pot body end face, and at least one part of the pot body end face is composed of the base body layer and the reinforcing layer;

the first protection layer is arranged on the end face of the pot body and covers the end face of the pot body.

2. The composite cookware of claim 1, further comprising:

and the rust-proof layer covers the substrate layer.

3. Composite pot according to claim 2,

and a part of the anti-rust layer is positioned between the end face of the substrate layer and the first protective layer, and the anti-rust layer covers the end face of the substrate layer.

4. Composite pot according to claim 3,

the thickness of the anti-rust layer covering the end face of the base layer is smaller than that of the anti-rust layer positioned on the side wall or the bottom wall of the composite pot body.

5. Composite pot according to claim 1 or 2, characterized in that it further comprises:

and the second protective layer is arranged on the outer side of the strengthening layer and covers the strengthening layer.

6. Composite pot according to claim 5,

the first protective layer is connected with the second protective layer.

7. Composite pot according to claim 5,

the second protective layer includes one of: fine iron layer, organic silicon coating, fluorine coating and spray metal layer.

8. Composite pot according to claim 1,

the substrate layer comprises a fine iron layer.

9. Composite pot according to claim 8,

the curing temperature of the first protective layer is less than or equal to 380 ℃.

10. Composite pot according to claim 1 or 2,

the strengthening layer comprises one of: an aluminum layer and a copper layer; and/or

The first protective layer comprises one of: organosilicon coating, fluorine coating, spraying metal layer.

11. Composite pot according to claim 1 or 2,

the number of the substrate layers is at least one, and the number of the strengthening layers is less than or equal to that of the substrate layers.

12. Composite cookware according to anyone of claims 2 to 4,

the rust-preventive layer comprises a nitriding rust-preventive layer.

13. Composite cookware according to anyone of claims 2 to 4,

the thickness of the anti-rust layer is more than or equal to 10 micrometers and less than or equal to 40 micrometers.

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