Enamel Parts

Abstract

To provide an enamel member which can easily form an enamel layer of a desired thickness on the edge and is resistant to burning and cracking. [Solution] An enamel component having a base metal 51 formed in a plate shape and an enamel layer 52 provided on the surface of the base metal 51, wherein the shape of an edge 31 in the plate shape is such that an end face shape 32 extending in the thickness direction LT of the plate shape at the edge 31 is a shape that protrudes convexly in a direction away from the edge 31 along the surface of the plate shape, and the end side shape extending in the length direction LP along the surface of the plate shape at the edge 31 is an uneven shape with alternating concave and convex shapes.

Description

[Technical field]

[0001] The present invention relates to an enamel component. [Background technology]

[0002] Enamel parts (also called "porcelain enamel parts") are known, which are made by baking a glassy glaze (also called "glaze") containing silica (silicon dioxide) at high temperature onto the surface of a base metal such as iron or aluminum (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 62-054087 Summary of the Invention [Problem to be solved by the invention]

[0004] In enamel parts, it is desirable that the enamel layer formed from the baked glaze (hereinafter, also referred to as the enamel layer) is uniformly formed on the surface of the base metal. However, for the reasons explained below, there are problems in that the enamel layer chips, exposing the base metal, or cracks occur in the enamel layer.

[0005] Generally, with base metal formed into a sheet shape, it is difficult to apply a desired thickness of glaze to the edges of the sheet, which are cut sections compared to the plane of the sheet. For example, when the base metal is thin, the layer of glaze covering the edges tends to be thin, which can lead to burn-off, exposing the base metal, during the enamel process in which the glaze is baked.

[0006] Furthermore, when the base metal is thick, the layer of glaze that covers the edges tends to be thick, and the difference between the expansion coefficients of the base metal and the glaze makes it easier for cracks to form in the enamel layer during the enamel process in which the glaze is baked. In other words, it is difficult to form an enamel layer of a desired thickness on the edge of the base metal.

[0007] The present invention aims to provide an enamel part that makes it easy to form an enamel layer of a desired thickness on the edge and is less likely to burn off or crack. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides the following means. The enamel part of the present invention is an enamel part having a base metal formed into a plate shape and an enamel layer provided on the surface of the base metal, and is characterized in that, among the shapes of the edges of the plate shape, an end face shape that is a shape extending in the thickness direction of the plate shape at the edge is a shape that protrudes convexly in a direction away from the edge along the surface of the plate shape, and an end side shape that is a shape extending in the length direction along the surface of the plate shape at the edge is an uneven shape with alternating concave and convex shapes.

[0009] According to the enamel member of the present invention, the end face shape of the edge is made to be convex and the edge shape of the edge is made to be uneven, which makes it easier to form an enamel layer of the desired thickness on the edge, and makes it less likely to burn off or crack.

[0010] The enamel layer is formed by enameling, which involves baking a glaze onto the surface of the base metal. By making the edge of the rim have a convex shape and making the edge of the rim have an uneven shape, the glaze adheres to the rim more easily than when such shapes are not used, and the thickness of the glaze can be easily adjusted.

[0011] For example, even if the base metal plate is thin, the thickness of the glaze that adheres to the edge can be made thick enough to prevent burn-off. There is less need to make the base metal plate thicker to prevent burn-off, and cracks are less likely to occur.

[0012] In addition, if the edges have sharp edges, such as burrs from pressing or cutting, glaze does not adhere easily to the sharp edges. In addition, if the edge end shape is flat, the edges form corners at angles close to 90° where they meet the top or bottom of the edge. Glaze also does not adhere easily to these corners. By making the edge end shape convex, there are no sharp edges or corners, making it easier for glaze to adhere.

[0013] Furthermore, when the edge shape of the edge is straight, the area on which the glaze can adhere is small, making it difficult for the glaze to adhere to the edge. By making the edge shape of the edge uneven, the area on which the glaze can adhere is increased, making it easier for the glaze to adhere to the edge.

[0014] In the above device, it is preferable that the end face shape is a shape that protrudes in an arc shape.

[0015] By forming the end face in an arc-like protruding shape in this way, the number of corners that make it difficult for the glaze to adhere to the edge is reduced, making it easier to stably apply the glaze to the edge.

[0016] In the above device, the end face shape is preferably a semicircular shape having a radius that is half the thickness at the edge portion.

[0017] In this way, by making the end face shape semicircular and having a radius that is half the thickness of the edge, the upper and lower surfaces of the edge are smoothly connected to the end face shape, which makes it easier to stably apply glaze to the entire edge.

[0018] In the above device, it is preferable that the distance from the bottom of the concave portion to the apex of the convex portion of the uneven shape in the edge shape is 30% to 50% of the thickness of the edge portion.

[0019] This makes it easier to keep the thickness of the glaze applied to the edge, in the longitudinal direction, within a desired range.

[0020] In the above device, it is preferable that the pitch, which is the distance between adjacent convexities in the uneven shape of the edge shape, is 2.0 to 3.0 times the thickness of the edge portion.

[0021] This makes it easier to keep the thickness of the glaze applied to the edge, in the longitudinal direction, within a desired range.

[0022] In the above device, it is preferable that the edge shape is a corrugated shape in which repeated concaves and convexes are connected by curved lines.

[0023] By making the edges wavy in this way, the number of corners that make it difficult for the glaze to adhere to them is reduced, making it easier to stably apply the glaze to the edges.

[0024] In the above-mentioned invention, it is preferable that the radius of the convex portion of the uneven shape of the edge shape is equal to or greater than the radius of the concave portion.

[0025] This makes it easier to keep the thickness of the glaze applied to the edge, in the longitudinal direction, within a desired range.

[0026] In the above device, it is preferable that the convexities in the uneven shape of the end shape have a radius that is 2.0 to 3.5 times the thickness of the edge portion, and the concaves in the uneven shape of the end shape have a radius that is 1.0 to 2.0 times the thickness of the edge portion.

[0027] This makes it easier to keep the thickness of the glaze applied to the edge, in the longitudinal direction, within a desired range. Effect of the Invention

[0028] According to the enamel member of the present invention, the end face shape of the edge is made to be convex and the edge shape of the edge is made to be uneven, which makes it easier to form an enamel layer of the desired thickness on the edge, and makes it less likely to burn off or crack. [Brief description of the drawings]

[0029] [Figure 1] FIG. 2 is a front view illustrating the configuration of the enamel member of the present invention. [Diagram 2] FIG. 2 is a top view illustrating the configuration of the enamel member in FIG. [Diagram 3] 2 is a top view illustrating the configuration of the handle portion in FIG. 1 before pressing. FIG. [Figure 4] FIG. 4 is a partially enlarged cross-sectional view illustrating the shape of an end face of an edge portion. [Diagram 5] FIG. 4 is a partial enlarged view illustrating the shape of an end side of an edge portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The enamel member 10 according to the present invention will be described below with reference to Fig. 1 to Fig. 5. In this embodiment, the enamel member 10 is described as a pot lid included in household ware used at home. The enamel member 10 may be a cooking utensil such as a pot or storage container included in household ware, or may be tableware such as a cup.

[0031] Furthermore, the enamel member 10 may be miscellaneous goods, scientific supplies, outdoor equipment, interior items, cast iron bathtubs, etc. The enamel member 10 may be a kitchen appliance, a hot water appliance, a heating appliance, an oil stove part, or a combustion appliance including a bathroom heater / dryer.

[0032] The enamel member 10 may be a sink, a system kitchen, a bathtub, a unit bath, a vanity unit, or a building panel. The enamel member 10 may be a heat exchanger including a heat exchanger panel. The enamel member 10 may be a nameplate, a signboard, or a sign.

[0033] As shown in Figs. 1 and 2, an enamel member 10 which is a lid for a pot is mainly provided with a lid body 20 and a handle portion 30.

[0034] The lid body 20 is a part that closes the opening of the pot, and is formed in a shape that covers the opening of the pot when viewed from above. The lid body 20 of this embodiment is formed in a disk shape, and has a shape in which the circumferential part is bent toward the pot. Note that the lid body 20 can be formed in various shapes depending on the shape of the pot, and is not limited to a specific shape.

[0035] The handle portion 30 is a part to be held by hand, and is the part to be held when closing or opening the opening of the pot with the lid body 20. As shown in FIG. 2, the handle portion 30 of this embodiment is a member formed in a plate shape extending like an arm in three directions. For example, it is a member having a shape extending in three directions at equal intervals in the circumferential direction. The tip portions extending in the three directions are curved toward the lid body 20, and the curved ends are attached to the lid body 20.

[0036] The handle portion 30 formed in a plate shape has an edge portion 31 as shown in Figures 3 to 5. The edge portion 31 is an end portion where the plate shape is cut. The edge portion 31 is located along the side of the plate shape that extends like an arm in three directions. The handle portion 30 has a base metal 51 and an enamel layer 52 provided on the surface of the base metal 51 as shown in Figure 4. Note that the lid main body 20 also has a base metal 51 and an enamel layer 52 like the handle portion 30.

[0037] The base metal 51 is a member that constitutes the shape of the lid body 20 and the handle portion 30. As the base metal 51, enameled iron plate, cast iron, stainless steel, Al-plated steel (also written as aluminized steel), aluminum, copper, etc. can be used.

[0038] In this embodiment, the base metal 51 is cut by laser processing to form the general shapes of the lid body 20 and the handle portion 30, and then the edges 31 are subjected to processing such as filing to remove corners, and press processing to form the lid body 20 and the handle portion 30. The formed lid body 20 and the handle portion 30 are joined by welding.

[0039] The enamel layer 52 is a layer that covers the surface of the base metal 51, and is formed by baking a glassy glaze that contains silica (silicon dioxide). Any known glaze can be used to form the enamel layer 52, and the glaze is not limited to a specific one. Furthermore, any known baking method can be used, and the baking method is not limited to a specific one.

[0040] 4, the edge portion 31 has an end surface shape 32 that extends in the thickness direction LT of the plate shape. The end surface shape 32 has a shape that protrudes convexly in a direction away from the edge portion 31 along the surface of the plate shape.

[0041] The end face shape 32 of this embodiment has a shape that protrudes in an arc shape, and has a semicircular shape with a radius that is half (T / 2) of the thickness T at the edge portion 31. The end face shape 32 may have a polygonal shape formed by a plurality of faces, or may have a shape that protrudes in an elliptical shape.

[0042] The edge portion 31 has an edge shape 33 that extends in the longitudinal direction LP along the plate-shaped surface as shown in Fig. 5. The edge shape 33 has an uneven shape with alternating concaves and convexes. The edge shape 33 of this embodiment is an uneven shape that is a wave shape in which repeated concaves and convexes are connected by curved lines. The edge shape 33 may have a polygonal shape formed by multiple faces.

[0043] The distance H from the bottom of the concave portion to the apex of the convex portion of the uneven shape in the edge shape 33 of this embodiment is 30% to 50% of the thickness T of the edge portion 31. Note that the distance H of the edge shape 33 may be less than 30% or more than 50% of the thickness T.

[0044] The pitch P, which is the distance between adjacent convexities in the concave-convex shape of the edge shape 33 of this embodiment, is 2.0 to 3.0 times the thickness T of the edge portion 31. The pitch P of the edge shape 33 may be less than 2.0 times the thickness T, or more than 3.0 times the thickness T.

[0045] In this embodiment, the radius R1 of the convex portion of the uneven shape of the edge shape 33 is equal to or greater than the radius R2 of the concave portion. Note that the radius R1 of the convex portion of the edge shape 33 may be less than the radius R2 of the concave portion.

[0046] In this embodiment, the convexities in the uneven shape of the edge shape 33 have a radius R1 that is 2.0 to 3.5 times the thickness T of the edge 31, and the concaves in the uneven shape of the edge shape 33 have a radius R2 that is 1.0 to 2.0 times the thickness T of the edge 31.

[0047] The radius R1 of the convex portion of the edge shape 33 may be less than 2.0 times the thickness T or more than 3.5 times the thickness T. The radius R2 of the concave portion of the edge shape 33 may be less than 1.0 times the thickness T or more than 2.0 times the thickness T.

[0048] According to the enamel member 10 having the above-described configuration, the end face shape 32 of the edge portion 31 is made to have a convex protruding shape, and the edge shape 33 of the edge portion 31 is made to have an uneven shape, so that it becomes easier to form an enamel layer 52 of the desired thickness on the edge portion 31, and burn-off and cracks are less likely to occur.

[0049] The enamel layer 52 is formed by an enamel process in which a glaze is baked onto the surface of the base metal 51. By making the end face shape 32 of the edge portion 31 a convexly protruding shape and making the edge of the edge portion 31 uneven, the glaze adheres to the edge portion 31 more easily and the thickness of the glaze can be adjusted more easily than if such shapes were not used.

[0050] For example, even if the thickness of the base metal 51 is thin, the thickness of the glaze adhering to the edge portion 31 can be made to be thick enough to prevent burn-off. There is less need to make the base metal 51 thick in order to prevent burn-off, and cracks are less likely to occur.

[0051] In addition, if edge 31 has a sharp shape, such as a burr caused by pressing or a burr caused by cutting, glaze does not adhere easily to the sharp part (for example, a part with an angle of 90° or less). In addition, if end face shape 32 of edge 31 is flat, the boundary between end face shape 32 and the upper or lower surface of edge 31 forms a corner with an angle close to 90°. Glaze also does not adhere easily to these corners. By making end face shape 32 of edge 31 a convex protruding shape, there are no sharp parts or corners, making it easier to apply glaze.

[0052] Furthermore, if edge shape 33 of edge 31 is straight, the area on which the glaze can adhere is small, making it difficult for the glaze to adhere to edge 31. By making edge shape 33 of edge 31 uneven, the area on which the glaze can adhere is increased, making it easier for the glaze to adhere to edge 31.

[0053] By forming the end face shape 32 in a shape that protrudes in an arc, the number of corners at which it is difficult for the glaze to adhere to the edge portion 31 is reduced. Therefore, it becomes easier to stably apply the glaze to the edge portion 31.

[0054] By making the end surface shape 32 semicircular and having a radius that is half (T / 2) of the thickness T of the edge portion 31, the upper and lower surfaces of the edge portion 31 smoothly connect to the end surface shape 32. Therefore, it becomes easier to stably apply glaze to the entire edge portion 31.

[0055] By setting the distance H in the edge shape 33 to be between 30% and 50% of the thickness T at the edge 31, it becomes easier to keep the thickness of the glaze adhering to the edge 31, that is, the longitudinal thickness, within the desired range.

[0056] By making the pitch P in the edge shape 33 2.0 to 3.0 times the thickness T at the edge 31, it becomes easier to keep the thickness of the glaze adhering to the edge 31, that is, the longitudinal thickness, within the desired range.

[0057] By making the edge shape 33 an uneven shape that is a wave shape connected by curved lines, the number of corners where the glaze does not easily adhere is reduced, making it easier to stably apply the glaze to the edge portion 31.

[0058] By making the convex radius value R1 of the edge shape 33 greater than or equal to the concave radius value R2, it becomes easier to keep the thickness of the glaze adhering to the edge 31, that is, the thickness in the longitudinal direction, within the desired range.

[0059] By setting the convexity of the end shape 33 to a radius R1 that is 2.0 to 3.5 times the thickness T of the edge 31, and the concaveity to a radius R2 that is 1.0 to 2.0 times the thickness T of the edge 31, it becomes easier to keep the thickness of the glaze adhering to the edge 31, and the longitudinal thickness, within the desired range.

[0060] Furthermore, the technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the edge portion 31 is provided on the handle portion 30, but the edge portion 31 may be provided on a member other than the handle portion 30. Specifically, the edge portion 31 may be provided on the lid body 20, and the member on which the edge portion 31 is provided and the location of the member are not limited. [Explanation of symbols]

[0061] 10... enamel member, 31... edge portion, 32... end surface shape, 33... edge shape, 51... base metal, 52... enamel layer, LT... thickness direction, LP... length direction

Claims

1. An enamel member having a base metal formed into a plate shape and an enamel layer provided on a surface of the base metal, Among the shapes of the edge portions of the plate shape, an end surface shape of the edge portion extending in a thickness direction of the plate shape is a shape that protrudes convexly along a surface of the plate shape in a direction away from the edge portion, The enamel member is characterized in that the edge shape, which is a shape extending in the length direction along the surface of the plate shape at the edge portion, has an uneven shape with alternating concaves and convexes.

2. 2. The enamel member according to claim 1, wherein the end face has a shape that protrudes in an arc shape.

3. 3. The enamel member according to claim 2, wherein the end face shape is a semicircular shape having a radius that is half the thickness at the edge portion.

4. 2. The enamel member according to claim 1, wherein the distance from the bottom of the concave portion to the apex of the convex portion of the concave-convex shape in the edge shape is 30% to 50% of the thickness of the edge portion.

5. 2. The enamel member according to claim 1, wherein a pitch, which is a distance between adjacent convexities in the uneven shape of the edge shape, is 2.0 to 3.0 times the thickness of the edge portion.

6. 6. The enamel member according to claim 4, wherein the edge shape is a corrugated shape formed by connecting repeated concaves and convexes with curved lines.

7. 7. The enamel member according to claim 6, wherein a radius of a convex portion of the uneven edge shape is equal to or greater than a radius of a concave portion.

8. The convex portion in the uneven shape of the edge shape has a radius that is 2.0 times or more and 3.5 times or less the thickness of the edge portion, 7. The enamel member according to claim 6, wherein the concave portion in the uneven shape of the edge shape has a radius that is 1.0 to 2.0 times the thickness of the edge portion.

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