METHOD FOR MANUFACTURING A PAN AND NON-STICK PAN

Abstract

The present invention relates to a method for manufacturing a frying pan. The method comprises: preparing a stainless steel roll; feeding the stainless steel plate into a rolling mill to roll the stainless steel plate until a pattern is formed on the stainless steel plate, the stainless steel plate entering the rolling mill in an inlet direction with an angle formed between the inlet direction and the horizontal line, and the stainless steel plate exiting the rolling mill in an outlet direction with an angle formed between the outlet direction and the horizontal line; punching a rolled stainless steel plate to form a frying pan body; sequentially combining a uniform heating layer and a heating layer on a bottom of the frying pan body; sandblasting an inner surface of the frying pan; spraying the inner surface of the frying pan; and polishing the inner surface of the frying pan body to remove the coating on the upper surface of each of the ribs.Figure for abstract: Figure 1.

Description

Title of the invention: METHOD FOR MANUFACTURING A PAN AND NON-STICK PAN Technical field of the invention

[0001] The present invention relates to the field of kitchen utensils, and in particular to a method of manufacturing a frying pan, and a non-stick frying pan manufactured using the method of manufacturing a frying pan. State of the art

[0002] Currently, non-stick pans available on the market are generally equipped with a non-stick coating on the pan body to prevent food from sticking to the pan body. However, the coating tends to fall off due to heat and friction with a spatula during use, which affects the use of the non-stick pan and even contaminates the food.

[0003] In order to prevent the coating of the non-stick pan from falling off, a non-stick pan with a concave and convex pattern on the inner surface of the pan body has appeared on the market. The concave and convex pattern is mainly arranged on the bottom of the pan body, and the inner walls of some pans are also provided with the pattern. The concave parts of the concave and convex pattern are provided with a non-stick coating, while the upper surface of the concave and convex pattern is not provided with a coating. This design reduces the contact area between the food and the inner surface of the pan, effectively improves the non-stick effect, prevents the food and the spatula from directly contacting the coating, improves the durability of the coating, and prevents the coating from falling off. However, the concave and convex pattern of the existing non-stick pan is mainly formed by stamping or chemical corrosion.In the case where the stamping process is used to process the concave and convex pattern on the pan body, due to the problem of demolding, the size of the concave and convex pattern obtained by stamping is generally relatively large, and the non-stick effect is reduced; in addition, the stamping needs to be carried out one by one, so the efficiency is relatively low. In the case where chemical etching is used to make the concave and convex pattern in the pan body, the process is complicated, the production cost is high, and the chemical materials used tend to pollute the environment.

[0004] It is therefore necessary to provide a novel method of manufacturing a frying pan and a non-stick frying pan manufactured using the method of manufacturing a frying pan. Presentation of the invention

[0005] In order to solve one of the technical problems existing in the existing technology, the present invention provides a method for manufacturing a pan, in which a pattern in a pan body is formed by rolling, thereby achieving high production efficiency and good non-stick effect.

[0006] In addition, the present disclosure also provides a non-stick pan manufactured using the above method of manufacturing a pan.

[0007] In a first aspect of the present invention, one embodiment provides a method of manufacturing a pan, comprising at least the following steps:

[0008] IF, prepare a roll of stainless steel plate;

[0009] S2, feed the stainless steel plate to a convex grain rolling mill for rolling until forming a pattern with a concave and convex structure on one side of the stainless steel plate, the pattern comprising ribs and grooves, and the stainless steel plate entering the rolling mill in an inlet direction with an angle formed between the inlet direction and a horizontal line, and the stainless steel plate exiting the rolling mill in an outlet direction with an angle formed between the outlet direction and the horizontal line;

[0010] S3, punch the rolled stainless steel plate to form a shape of stove body, the pattern being located on an interior surface of the stove body after punching;

[0011] S4, compose a bottom of the stove body obtained after punching with a layer uniform heating and a heating layer in order;

[0012] S5, sanding part or all of the interior surface of the stove body, so as to form a rough surface on the inner surface of the stove body;

[0013] S6, spray the sandblasted surface into the stove body, so as to form a non-stick coating on the inner surface of the pan body; and

[0014] S7, polish the sandblasted or sprayed surface in the pan body to remove the coating on an upper surface of each of the ribs, so as to expose the stainless steel on the upper surface of each of the ribs.

[0015] The method for manufacturing a pan according to embodiments of the first aspect of the present invention has at least the following beneficial effects: the pattern with the concave and convex structure is firstly machined on the stainless steel plate by rolling; compared with the existing technology, machining the pattern by rolling can avoid the difficulty of demolding, so that the smaller size pattern can be realized, the non-stick effect of the pan body is improved, and the rolling manner will not pollute the environment. At the same time, the rolling method can achieve continuous machining of the fine pattern, improve production efficiency, save production materials, and enhance product competitiveness.

[0016] According to the method for manufacturing a pan according to the first aspect of the present invention, in step S2, a width of an upper surface of the rib in the pattern formed after rolling is 0.15-0.6 mm. Due to the limitations of the demolding technology, the width of the upper surface of each of the ribs in the pattern formed by stamping in the existing technology is more than 0.5 mm, and when the width of the upper surface of each of the ribs is less than 0.5 mm, it is difficult to demold once a flat surface is stamped as a whole, and thus it is difficult to implement production. However, the smaller the width of the upper surface of each of the ribs, the smaller the food contact area and the better the non-stick effect.

[0017] According to the method for manufacturing a pan in the first aspect of the present invention, in step S2 above, a depth of each of the grooves in the pattern formed after rolling is 0.02 to 0.15 mm.

[0018] According to the method for manufacturing a pan in the first aspect of the present invention, in step S2, when the depth of each of the grooves to be machined is required to be greater than 0.08 mm, the stainless steel plate is first introduced into a preheating furnace to be heated and softened before the stainless steel plate enters the rolling mill, and then the softened stainless steel plate is introduced into the rolling mill. The softened stainless steel plate has higher plasticity and makes the pattern can be formed more easily by rolling when passing through the rolling mill, thereby reducing the machining difficulty and improving the yield rate of the product.

[0019] According to the method for manufacturing a frying pan in the first aspect of the present invention, the temperature inside the preheating furnace is 200°C to 600°C, which effectively softens the stainless steel material.

[0020] According to the method for manufacturing a pan in the first aspect of the present invention, the rolling mill comprises a driving roller and a driven roller, and the convex pattern is arranged on a surface of the driving roller.

[0021] According to the method for manufacturing a pan in the first aspect of the present invention, a pressure-increasing roller is arranged on the outer side of the rolling mill. By arranging the pressure-increasing roller, the pressure of the rolling mill on the stainless steel plate is increased, thereby facilitating the unwinding of the pattern. In addition, the diameter of the pressure-increasing roller is larger than the diameter of the rolling mill.

[0022] According to the method of manufacturing a pan in the first aspect of the present invention, the angle α formed between the entry direction of the stainless steel plate when entering the rolling mill and the horizontal line is between 5° and 20°. The stainless steel plate enters the rolling mill with a slight inclination, which makes the entry of the stainless steel plate smooth.

[0023] According to the method for manufacturing a pan in the first aspect of the present invention, the angle [3 formed between the exit direction of the stainless steel plate at the exit of the rolling mill and the horizontal line is between 5° and 20°. The stainless steel plate leaves the rolling mill with a slight inclination, which results in smooth separation of the stainless steel plate from the rolling mill after rolling.

[0024] According to the method for manufacturing a pan in the first aspect of the present invention, in the pattern formed after rolling in step S2 above, the upper surface and the side walls of the rib are perpendicular to each other. Such a design can further reduce the width of the upper surface and improve the non-stick effect.

[0025] According to the method for manufacturing a pan in the first aspect of the present invention, in step S2, a width of the groove in the pattern formed after rolling is 0.1 to 10 mm.

[0026] According to the method for manufacturing a pan according to the first aspect of the present invention, in step S2, the pattern formed after rolling comprises at least one of a lattice, a honeycomb or a multiple protrusion pattern.

[0027] According to the method of manufacturing a pan in the first aspect of the present invention, the heating layer is made of ferritic stainless steel.

[0028] According to the method of manufacturing a pan in the first aspect of the present invention, the uniform heating layer is made of an aluminum alloy.

[0029] In a second aspect of the present invention, one embodiment relates to a non-stick pan, the non-stick pan is manufactured using the method of manufacturing a pan described in the first aspect of the present invention.

[0030] The non-stick pan according to the embodiments of the second aspect of the present invention has at least the following beneficial effects: the non-stick pan of the present invention is manufactured using the above-mentioned method of manufacturing a pan, which has high production efficiency and has no problem of demolding and environmental pollution. At the same time, the produced non-stick pan can have a smaller pattern size to improve the non-stick effect of the pan body and improve the competitiveness of the product.

[0031] Additional features and advantages of the present invention will be set forth in the following description, and will be partially apparent from the description, or understood by the practice of the present disclosure. The objects and other advantages of the present invention may be realized and obtained by structures particularly pointed out in the description, claims, and accompanying drawings. Brief description of the drawings

[0032] The accompanying drawings are used to provide a better understanding of the technical solution of the present disclosure and constitute a part of the description. They are used to explain the technical solution of the present disclosure as well as the embodiments of the present disclosure and do not constitute a limitation of the technical solution of the present disclosure.

[0033] [Fig. 1] is a first embodiment of rolling a stainless steel plate in a method of manufacturing a pan provided in the first aspect of the present invention.

[0034] [Fig.2] is a second embodiment of rolling a stainless steel plate in the method of manufacturing a pan provided under the first aspect of the present invention.

[0035] [Fig.3] is a sectional view of a stainless steel plate with a pattern obtained after rolling.

[0036] [Fig.4] is a cross-sectional view of a stove body obtained after punching the stainless steel plate of [Fig.3].

[0037] [Fig.5] is a cross-sectional view of the stove body of [Fig.4] composed of a uniform heating layer and a heating layer.

[0038] [Fig.6] is a cross-sectional view of the stove body of [Fig.5] after being sandblasted, sprayed and polished.

[0039] [Fig.7] is a flowchart of the steps of the method of manufacturing a pan provided by the present invention.

[0040] [Fig.8] is a schematic structural diagram of a non-stick pan provided under the second aspect of the present disclosure.

[0041] [Fig.9] is a schematic diagram of the non-stick pan of [Fig.8] with a handle. Detailed description of the invention

[0042] Reference numbers for the drawings:

[0043] stainless steel plate roller 10, stainless steel plate 11, rolling mill 20, driving roller 21, driven roller 22, pressure increasing roller 23, preheating furnace 30;

[0044] stove body 100, heating layer 110, uniform heating layer 120, pattern 130, rib 131, top surface 1311, side wall 1312, groove 132, coating 133, outer rim 140, handle 200.

[0045] In order to clarify the objective, technical solutions and advantages of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments specific embodiments described herein are only used to explain this disclosure and are not used to limit this disclosure.

[0046] In describing the present invention, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, it may be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integrated connection; it may be a mechanical connection, an electrical connection, or a communication between them; it may be a direct connection, or an indirect connection via an intermediate medium or structure; and it may be an internal connection, an indirect connection, or an interactive relationship between two elements.

[0047] In describing the present invention, it should be noted that "several" means one or more, "plural (or multiple)" means more than two; "greater than, less than, more than etc." are intended to exclude the original number; and "above, below, within, etc." are intended to include the original number. The description of "first," "second," etc. is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implying the quantity or order of the technical features indicated.

[0048] Embodiments of the present invention will be described in more detail below with reference to [Fig.l] to 9.

[0049] With reference to [Fig.l] to 7, a first aspect of the present invention relates to a method of manufacturing a pan, which comprises at least the following steps:

[0050] SL A roll of stainless steel plate 11 is prepared.

[0051] S2. As shown in [Fig.l], the stainless steel plate 11 is introduced into a rolling mill 20 for rolling. A surface of the rolling mill 20 is provided with a convex grain. The stainless steel plate 11 enters the rolling mill 20 in an inlet direction with an angle formed between the inlet direction and a horizontal line, and the stainless steel plate 11 exits the rolling mill 20 in an outlet direction with an angle formed between the inlet direction and the horizontal line. A pattern 130 with a concave and convex structure is formed on one side of the stainless steel plate 11 by means of rolling. As shown in [Fig. 3], the pattern 130 comprises ribs 131 and grooves 132.

[0052] S3. As shown in [Fig.4], the stainless steel rolled plate 11 is punched to form a pan body shape 100, and the pattern 130 is located on an inner surface of the pan body 100 after punching.

[0053] S4. As shown in [Fig.5], a bottom of the stove body 100 obtained after punching is sequentially composed of a uniform heating layer 120 and a heating layer 110.

[0054] S5. A portion or all of the interior surface of the stove body 100 is sandblasted to form a rough surface on the inner surface of the stove body 100.

[0055] S6. The sandblasted surface of the stove body 100 is sprayed to form a coating non-stick 133 on the inner surface of the pan body 100.

[0056] S7. The sandblasted or spray-coated surface of the stove body 100 is polished to remove the coating 133 on the upper surface of each of the ribs 131, so that the stainless steel is exposed on the upper surface of each of the ribs 131 as shown in [Fig.6], and the pan is obtained.

[0057] In addition, in step S2, in the pattern 130 formed after rolling, the width of the upper surface 1311 of the rib is 0.15 to 0.6 mm. However, due to the limitations of the demolding technology, the width of the upper surface of each of the ribs of a pattern formed by stamping in the existing technology is more than 0.5 mm; when the width of the upper surface 1311 of the rib is less than 0.5 mm, it is difficult to demold when the flat surface is stamped as a whole, making it difficult to implement production. According to the present invention, rolling is used to form the pattern 130 on the surface of the stainless steel plate 11 to avoid the demolding problem.Therefore, the width of the upper surface of each of the ribs 1311 can be reduced to a smaller size, and the narrower the width of the upper surface of each of the ribs 1311, the smaller the food contact area and the better the non-stick effect.

[0058] In addition, in step S2, in the pattern formed after rolling, the depth of each of the grooves 132 is 0.02 to 0.15 mm, and the depth of each of the grooves 132 can be flexibly adjusted according to the size of the product itself and practical requirements. The depth of each of the grooves 132 also affects the sequence of manufacturing processes of the pan. Specifically, as shown in [Fig.l], when the depth of each of the grooves 132 to be machined is required to be less than 0.08 mm, the stainless steel plate 11 directly enters the rolling mill 20 for rolling; and as shown in [Fig.2], when the depth of each of the grooves to be machined is required to be greater than 0.08 mm, before entering the rolling mill 20, the stainless steel plate 11 is first introduced into the preheating furnace 30 to be heated. The temperature inside the preheating furnace 30 is 200°C to 600°C.By heating in the preheating furnace 30, the stainless steel plate 11 is softened, and then the softened stainless steel plate 11 is fed to the rolling mill 20. The softened stainless steel plate has better plasticity and facilitates the rolling of the pattern when passing through the rolling mill 20, thereby reducing the machining difficulty and improving the yield rate of the product.

[0059] Furthermore, in step S2, when the stainless steel plate 11 enters the rolling mill 20, the angle α formed between the inlet direction and the horizontal line is 5° to 20°, and when the stainless steel plate 11 exits the rolling mill 20, the angle [3 formed between the outlet direction and the horizontal line is 5° to 20°. As shown in [Fig. 1] and 2, the stainless steel plate 11 enters and exits the rolling mill 20 with a slight inclination, which makes the inlet of the stainless steel plate 11 smooth and results in smooth separation of the stainless steel plate 11 from the rolling mill 20 after rolling.

[0060] Furthermore, as shown in [Fig.l] and 2, in the above step S2, the rolling mill 20 comprises a driving roller 21 and a driven roller 22, and the convex pattern is provided on the surface of the driving roller 21. Furthermore, a pressure increasing roller 23 is provided on the outer side of the rolling mill 20. The diameter of the pressure increasing roller 23 is larger than the diameter of the rolling mill 20. By adjusting the pressure increasing roller 23, the pressure of the rolling mill 20 on the stainless steel plate is increased. The diameter of the rolling mill 20 is smaller, so that the contact area between the rolling mill 20 and the pressure increasing roller 23 as well as the stainless steel plate 11 is reduced, thereby increasing the pressure intensity and facilitating the formation of the pattern.

[0061] Furthermore, in the above step S2, in the pattern 130 formed after rolling, the upper surface 1311 and the side walls 1312 of the rib 131 are perpendicular to each other, and the width of the groove 132 is 0.1 to 10 mm. Such a design can further reduce the width of the upper surface 1311 and improve the non-stick effect.

[0062] Further, in step S2, the pattern 130 formed after rolling preferably comprises at least one of a lattice shape, a honeycomb shape, or a multiple protrusion pattern.

[0063] Furthermore, in step S4 above, the compound heating layer 110 is made of ferritic stainless steel and can be heated by induction; and the uniform heating layer 120 is made of an aluminum alloy and has high thermal conductivity. The uniform heating layer 120 preferably covers the bottom of the pan body 100 uniformly, so that the bottom of the pan body 100 is heated uniformly due to the thermal conduction of the uniform heating layer 120.

[0064] Furthermore, in step S5, sandblasting may be carried out with a brown emery abrasive (a-type alumina). For the formed rough surface, the following roughness parameters are required: Ra > 2 pm, preferably 3 pm < Ra < 5 pm, and Rz > 25 pm, preferably 30 pm < Rz < 50 pm. The rough surface having such roughness may allow the subsequently sprayed coating 133 to have better adhesion and prevent the coating 133 from falling off during use.

[0065] Further, in step S6, a spray gun may be used to spray the inner surface of the pan body 100 to form the non-stick coating 133 on the inner surface of the pan body 100.

[0066] Furthermore, it is easy to understand that during the machining steps of the above manufacturing method of a pan or after completing the above steps, additional machining steps may be added according to actual needs, such as machining the upper edge of the pan body 100 to form an outer flange 140, and polishing the surface of the outer flange 140 to form a smooth surface on top of the outer flange 140. A handle 200 may also be installed on the pan body 100 by other processes.

[0067] With reference to [Fig. 8] and 9, a second aspect of the present invention relates to a non-stick pan, which is manufactured using the method for manufacturing a pan of the first aspect of the present disclosure. More specifically, the non-stick pan comprises a pan body 100. The pan body 100 is made of a stainless steel plate 11 which has first been rolled. One side of the stainless steel plate 11 forms a pattern 130 during rolling. When the pan body 100 is formed, the pattern 130 is arranged on an inner surface of the pan body 100. A heating layer 110 for induction heating is arranged at the bottom of the pan body 100. A uniform heating layer 120 is arranged between the pan body 100 and the heating layer 110. The inner surface of the pan body 100 is also provided with a non-stick coating 133. The coating 133 is distributed in grooves 132.Excess coating 133 is removed from the upper surface 1311 of the ribs by polishing, so that the upper surface 1311 of the ribs is not covered by the coating 133, as shown in [Fig. 6]. Furthermore, an outer flange 140 is provided in the upper edge of the pan body 100. A top of the outer flange 140 is polished to remove the pattern 130 to form a smooth surface. A handle 200 is also installed on an outer wall of the pan body 100.

[0068] According to the method for manufacturing a pan proposed by the invention, the pattern 130 with a concave and convex structure is firstly machined on the stainless steel plate 11 by rolling. Compared with the existing technology, the machining of the pattern 130 by rolling can avoid the difficulties of demolding, so that the smaller size pattern 130 can be realized, the non-stick effect of the pan body 100 will be improved and the rolling manner will be improved and the rolling manner will not pollute the environment. At the same time, the rolling mode can achieve continuous machining of the fine pattern 130, improve production efficiency and to save production materials. The non-stick pan manufactured using the above pan manufacturing method has high production efficiency and can be used to make smaller patterns, thereby improving the non-stick effect of the pan body 100, and improving the competitiveness of the product.

[0069] The foregoing is a detailed description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments mentioned above. Those skilled in the art will also be able to make various modifications or equivalent substitutions without departing from the essence of the present disclosure. These modifications or equivalent substitutions are all included within the scope defined by the claims of this disclosure.

Claims

Claims

1. A method for manufacturing a frying pan, comprising: S1, preparing a stainless steel plate roll; S2, feeding the stainless steel plate to a convex grain rolling mill for rolling until a pattern with a concave and convex structure is formed on one side of the stainless steel plate, the pattern comprising ribs and grooves, the stainless steel plate entering the rolling mill in an inlet direction with an angle formed between the inlet direction and a horizontal line, and the stainless steel plate exiting the rolling mill in an outlet direction with an angle formed between the inlet direction and a horizontal line; S3, punching the rolled stainless steel plate to form a frying pan body shape, the pattern being located on an inner surface of the frying pan body after punching; S4, composing a bottom of the frying pan body obtained after punching with a uniform heating layer and a heating layer in order;S5, sandblasting a portion or all of the inner surface of the pan body to form a rough surface on the inner surface of the pan body; S6, spraying the sandblasted surface into the pan body to form a non-stick coating on the inner surface of the pan body; and S7, polishing the sandblasted or sprayed surface into the pan body to remove the coating on an upper surface of each of the ribs, so as to expose stainless steel on the upper surface of each of the ribs.;

2. A method of manufacturing a pan according to claim 1, characterized in that in step S2, a width of the upper surface of each of the ribs in the pattern formed after rolling is 0.15 to 0.6 mm.

3. A method of manufacturing a pan according to claim 1, characterized in that in step S2, a depth of each of the grooves in the pattern formed after rolling is 0.02 to 0.15 mm.

4. A method of manufacturing a pan according to claim 3, characterized in that in step S2, provided that the depth of each of the grooves to be machined must be greater than 0.08 mm, feeds the stainless steel plate to a preheating furnace to heat and soften before the stainless steel plate enters the rolling mill, and then the softened stainless steel plate is fed into the rolling mill.

5. A method of manufacturing a pan according to claim 4, characterized in that a temperature inside the preheating oven is 200°C to 600°C.

6. A method of manufacturing a pan according to claim 1, characterized in that the angle formed, when the stainless steel plate enters the rolling mill, between the inlet direction and the horizontal line is 5° to 20°.

7. A method of manufacturing a pan according to claim 1, characterized in that the angle [3 formed, when the stainless steel plate exits the rolling mill, between the exit direction and the horizontal line is 5° to 20°.

8. A method of manufacturing a pan according to claim 1, characterized in that the heating layer is made of ferritic stainless steel.

9. A method of manufacturing a pan according to claim 1, characterized in that the uniform heating layer is made of an aluminum alloy.

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