Metal molding

Abstract

To provide a metal molding that does not cause scratch at a contact part when overlapped.SOLUTION: A metal molding has: a bottom part with an outer rising part 122 extending outward and upward; a body part with a tapered part 111 that widens outward as it extends upward and a constricted part 114 that is convex inward; and a cylindrical opening. The constricted part is present between the tapered part 111 and the outer rising part 122 and is formed in a curved line, and the tapered part 111 has a shape that continuously expands in diameter. When two metal moldings are stacked vertically, an upper part of an upper metal molding has a protruding part protruding from an upper end of a lower metal molding, an outer surface of the tapered part of the upper metal molding does not come into contact with an inner surface of the tapered part of the lower metal molding, the inner surface of the lower metal molding between the constricted part and the protruding part does not come into contact with the outer surface of the upper metal molding between the constricted part and the protruding part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a metal molded body having a bottom and a body, and an open top surface. [Background technology]

[0002] In recent years, in order to conserve resources and reduce waste, there has been a demand for containers that can replace containers made of paper, plastic, etc., and that are lightweight, inexpensive, and easily recyclable. Furthermore, due to growing global awareness of the need to prevent environmental pollution, such as the increasing pollution of the oceans by plastics, there is a demand for containers made from materials that are easily recovered for recycling. Metal containers with an open top that are used as tableware or as containers for filling drinks, food, etc. are well known (see Patent Document 1, etc.), and applications of these are conceivable.

[0003] Metal containers that are open at the top and can be washed and reused repeatedly, such as those used for tableware, are well known. However, in order to enhance durability in consideration of long-term use, a certain degree of thickness is required to increase the strength, which increases the material cost, molding cost, and weight, making them problematic as replacements for containers made of paper, plastic, etc. In recent years, the environment for recycling metal can containers has been improved, so by using metal containers made of thin materials such as those described in Patent Document 1, it is possible to reduce material costs, molding costs, and weight, while also saving resources and reducing waste even if the containers are used only once as tableware. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-128060 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, cup-shaped containers with an open top are generally stacked for storage and transportation, but when the containers are made of metal, scratches can form on the parts that come into contact when stacked, causing the laminate or paint to peel off and exposing the metal material. Furthermore, when multiple containers are stacked on top of each other, depending on the shape of the containers, the outer surface of the body of the upper container may come into close contact with the inner surface of the body of the lower container. As a result, when these stacked containers are to be separated individually, poor air circulation between the containers occurs, making separation difficult, which is known as blocking.

[0006] The present invention solves the above-mentioned problems and aims to provide a metal molded body that, when stacked, does not cause scratches at the contact points and suppresses exposure of the metal material, and can be easily separated into individual pieces from the stacked state. [Means for solving the problem]

[0007] The metal molded body according to the present invention is a metal molded body having a bottom portion, a body portion, and a cylindrical opening portion, the bottom portion has an outer raised portion extending outward and upward; The body portion has a tapered portion that widens outward as it extends upward and a constricted portion that convex inward, the constricted portion is present between the tapered portion and the outer rising portion and is formed by a curve, The radius of curvature of the outer rising portion is 0.5 to 5.0 mm, The radius of curvature of the curve constituting the constricted portion is 10 to 500 mm, the tapered portion has a cross section perpendicular to the axial direction of the body portion that is circular, substantially polygonal, or a combination thereof; the tapered portion does not have a step portion and has a shape in which the diameter continuously increases over the entire axial length of the body portion, When two of the metal molded bodies are stacked in the vertical direction, a protrusion at the top of the upper metal molded body protrudes beyond the top end of the lower metal molded body, an outer surface of the outer rising portion of the upper metal forming body abuts against an inner surface of the necked portion of the lower metal forming body; an outer surface of the tapered portion of the upper metal molding and an inner surface of the tapered portion of the lower metal molding do not come into contact with each other; The inner surface of the lower metal molding between the constricted portion and the protrusion is not in contact with the outer surface of the upper metal molding between the constricted portion and the protrusion. [Effects of the Invention]

[0008] The metal molded body according to the present invention has a constricted portion formed by an inwardly convex curve between a tapered portion of the body that widens outward as it extends upward and an outer rising portion of the base that extends outward and upward. This ensures strength, ease of gripping, design, ease of manufacture, and loading efficiency during transportation, while also ensuring the strength, ease of gripping, designability, ease of manufacture, and loading efficiency during transportation. When the metal molded bodies are separated from each other in a vertically stacked state, close surface contact between the outer surface of the body of the upper metal molded body and the inner surface of the body of the lower metal molded body is prevented, improving air circulation between the metal molded bodies, thereby achieving excellent ease of separation and suppressing the occurrence of blocking. Furthermore, the overall contact of the body portions when stacked is softened, thereby suppressing scratches at the contact points when stacked, and as a result, preventing the exposure of the metal material.

[0009] According to the metal molding of the present invention, in which the diameter at any position of the body is equal to or greater than the diameter of the uppermost end of the outer raised portion, the body does not protrude axially inward beyond the maximum diameter of the bottom, thereby achieving the above-mentioned effects while ensuring sufficient internal volume.

[0010] According to the metal molding of the present invention, in which the radius of curvature of the outer raised portion is 0.5 to 5.0 mm, it is possible to avoid pinpoint contact at the abutment points of the outer raised portions when overlapping, and to soften the contact, thereby reliably suppressing the occurrence of scratches at the abutment points when overlapping, and as a result, it is possible to reliably obtain the effect of preventing the exposure of the metal material. If the radius of curvature of the outer raised portion of the metal molded body is less than 0.5 mm, the outer raised portion may become sharp and scratch the contact area when the metal molded body is stacked. On the other hand, if the radius of curvature of the outer raised portion of the metal molded body is more than 5.0 mm, molding defects may easily occur when the bottom is molded.

[0011] According to the metal molded body of the present invention, in which the radius of curvature constituting the constricted portion is 10 to 500 mm, the body portion is prevented from protruding inward beyond the maximum diameter of the bottom portion, thereby achieving the above-mentioned effects while ensuring sufficient internal volume. If the radius of curvature of the necked portion of a metal molded body is less than 10 mm, the necked portion may be excessively convex inward, potentially causing scratches at the contact point with the outer rising portion of the metal molded body stacked on top. Furthermore, the boundary between the necked portion and the body may be sharply curved, potentially increasing the forming load during molding. Furthermore, when metal molded bodies are stacked vertically, the protruding portion of the upper metal molded body may protrude too far relative to the height of the other metal molded bodies, potentially resulting in a low stacking ratio. On the other hand, if the radius of curvature constituting the constricted portion of the metal molding exceeds 500 mm, the degree of inward convexity of the constricted portion is extremely small, so when the metal moldings are separated individually from a stacked state in the vertical direction, it is not possible to prevent the outer surface of the body of the upper metal molding from coming into close contact with the inner surface of the body of the lower metal molding, which results in poor air circulation between the metal moldings and makes it impossible to suppress the occurrence of blocking.

[0012] According to the metal molding of the present invention having a tapered portion that continuously expands in diameter along the entire axial length of the body, the outer rising portion of the upper metal molding and the lower portion of the tapered portion of the lower metal molding can be overlapped so that they abut, thereby reliably ensuring storage efficiency and loading efficiency during transportation.

[0013] The metal molded product of the present invention having a tapered portion composed of one or more panels arranged in a circumferential direction is easy to stack and grip by a user. Furthermore, the panels have a smoothly continuous peripheral surface, which ensures the above-mentioned effects. Furthermore, the tapered portion of the barrel, in a cross section perpendicular to the axial direction, has a circular, substantially polygonal, or combination thereof shape, which ensures the above-mentioned effects.

[0014] According to the metal molding of the present invention, when two metal moldings are stacked vertically, the outer surface of the outer raised portion of the upper metal molding abuts against the inner surface of the constricted portion of the lower metal molding, or when two metal moldings are stacked vertically, the outer surface of the outer raised portion of the upper metal molding abuts against the inner surface of the lower part of the tapered portion of the lower metal molding, storage efficiency and loading efficiency during transportation can be reliably ensured. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a longitudinal cross-sectional view showing an outline of a metal molded body (container) according to one embodiment of the present invention. [Figure 2] FIG. 2 is an end view showing the shape of the bottom and the lower part of the body of the metal molded body (container) of the present invention. [Figure 3] 10 is a longitudinal cross-sectional view showing a modified example of the cylindrical opening of the metal molded body (container) of the present invention. FIG. [Figure 4] 1 is a longitudinal cross-sectional view of a stack of metal molded bodies (containers) according to the present invention. [Figure 5] FIG. 5 is an enlarged cross-sectional view of a portion of FIG. [Figure 6] FIG. 4 is a cross-sectional end view showing a modified example of the metal molded body (container) of the present invention. [Figure 7]FIG. 4 is a schematic longitudinal sectional view of a metal molded body (container) according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] As shown in Figure 1, the metal molded body according to one embodiment of the present invention is a metal container 100 having a bottom 120, a body 110, and a cylindrical opening 130 that is open on the top side, and two or more of which can be stacked vertically. In this embodiment, the periphery of the opening of the cylindrical opening 130 is formed into a curled shape so that the sharp edge does not come into direct contact with the mouth when used as a cup. In this specification, the vertical direction refers to the axial direction in which the central axis X of the body 110 of the container 100 extends, and refers to the vertical direction when the container 100 is placed on a horizontal surface with the bottom 120 facing downward.

[0017] As shown in Figure 2, the bottom 120 has a dome portion 125 that is convex upward in the container (upward in Figure 2), and a grounding rim portion 121 that is annular and has a roughly trough-shaped cross section that is convex downward in Figure 2 radially outward from the dome portion 125. The ground contact rim portion 121 is shaped to maintain a stable upright position when the container 100 is in contact with the horizontal surface F, and has a ground contact portion 123 that comes into contact with the horizontal surface F when placed on the horizontal surface F, an outer raised portion 122 that extends radially outward above the ground contact portion 123, and an inner raised portion 124 that extends radially inward above the ground contact portion 123. An outer rising portion 122 of the ground-contacting rim portion 121 is connected to the lower end of a constricted portion 114 of the body portion 110, which will be described later, and an inner rising portion 124 is connected to an outer peripheral edge 126 of a dome portion 125. The outer peripheral edge 126 of the dome portion 125 is the periphery where the diameter of the spherical crown that constitutes the dome portion 125 is at its maximum.

[0018] The dome portion 125 has an overall spherical crown shape that is arc-shaped when viewed in a cross section including the central axis X of the container 100, and in this embodiment, the radius of curvature of the arc in the cross section including the central axis X is 160 mm. In this embodiment, the distance (bottom sink: BS) from the ground contact portion 123, which is the lowest end of the ground contact rim portion 121, to the top of the dome portion 125 is set to 4 mm.

[0019] The inner rising portion 124 is the portion from the contact portion 123 with the horizontal plane F of the container 100 to the outer circumferential edge 126 of the dome portion 125, and its outer circumferential surface is made up of a flat surface, a curved surface, or a combination thereof.

[0020] The outer rising portion 122 is a portion extending from a contact portion 123 with the horizontal plane F of the container 100 to the lower end of the constricted portion 114 . The outer rising portion 122 has an arc shape with a single radius of curvature in a cross section including the central axis X. The radius of curvature of the arc in the cross section including the central axis X is 0.5 to 5.0 mm, and is 2.3 mm in this embodiment. Alternatively, the outer rising portion 122 may have a substantially arc shape made up of portions with multiple radii of curvature in a cross section including the central axis X.

[0021] Body 110 has tapered portion 111 in the shape of an inverted truncated cone (tapered shape) that widens outward as it extends upward, and narrowed portion 114 that connects tapered portion 111 to bottom 120. In other words, body 110 is continuous with bottom 120 as narrowed portion 114 connects and extends from uppermost end 122a of outer rising portion 122 of bottom 120.

[0022] The entire body 110 has a size equal to or larger than the maximum diameter of the bottom 120. In other words, the diameter of any position on the body 110 is always equal to or larger than the diameter of the top end 122a of the outer rising portion 122, which is the maximum diameter of the bottom 120, and the body 110 does not protrude radially inward from the top end 122a of the outer rising portion 122 in the vertical direction. The tapered portion 111 does not have a step, and has a shape in which the diameter increases continuously over the entire axial length of the body portion 110. In this embodiment, the tapered portion 111 is made of a single panel in the shape of an inverted truncated cone, and has a linear, uniform tapered shape in a cross section including the central axis X. In other words, the cross section of the tapered portion 111 perpendicular to the axial direction of the body portion 110 has a circular shape. The taper angle θ of the tapered portion 111 is set to 2 to 15°, and is set to 5° in this embodiment. Containers with a taper angle of more than 15° have a large distance between adjacent containers when arranged horizontally in an upright position, resulting in poor storage efficiency. Containers with a taper angle of less than 2° are more difficult to separate when stacked vertically due to the risk of containers getting stuck. The panels that make up tapered portion 111 have outer and inner peripheral surfaces that are smoothly continuous over the entire axial length of body portion 110 . The tapered portion 111 has a height of 10% to 90% from the horizontal plane when the container 100 is placed upright on a horizontal plane, assuming that the total height of the container is 100%. In addition, as long as the tapered portion 111 has a shape that continuously expands in diameter overall, it may have a shape that combines curved and linear shapes in which the angle of the outward expansion gradually changes in cross-sectional view, or it may have a shape that has been processed with fine unevenness such as an embossed pattern, or a shape in which a bead portion is formed that bulges inward or outward to an extent that does not interfere with stacking.

[0023] The constricted portion 114 is located between the tapered portion 111 and the outer rising portion 122, and its lowest end is connected to the uppermost end 122a of the outer rising portion 122, and its uppermost end is connected to the lowermost end 111z of the tapered portion 111. The constricted portion 114 does not have any corners such as steps, and has a shape that is smoothly connected while continuously increasing in diameter over the entire axial length of the body portion 110. In other words, the diameter at any position of the constricted portion 114 is always equal to or greater than the diameter of the uppermost end 122a of the outer rising portion 122, and the constricted portion 114 does not protrude radially inward beyond an imaginary line L that extends vertically from the uppermost end 122a of the outer rising portion 122. The lowermost end of the constricted portion 114 has the smallest diameter, and the uppermost end of the constricted portion 114 has the largest diameter. Specifically, constricted portion 114 is formed by a curve that convexly extends inward in a cross section including central axis X, and the radius of curvature of the curve in the cross section including central axis X is 10 to 500 mm, and is 100 mm in this embodiment. The curve that forms constricted portion 114 may be made up of a combination of multiple portions with different radii of curvature or straight lines. The angle of the approximate straight line of the curve relating to the constricted portion 114, i.e., the angle of the virtual line connecting the lowest end 111z of the tapered portion 111 and the highest end 122a of the outer rising portion 122, is an angle smaller than the taper angle of the tapered portion 111, for example, 1.0 to 7.0°, and in this embodiment is 2.3°.

[0024] The cylindrical opening 130 is connected to the uppermost end of the tapered portion 111 and continues to the upper opening, and does not widen outward, for example, and has a substantially cylindrical shape. The cylindrical opening 130 may be formed to expand outward at an angle different from that of the tapered portion 111. Furthermore, as shown in Fig. 3, the cylindrical opening 130 may be formed with a shoulder 131 having a stepped portion and expanding in diameter outward.

[0025] The plate material for forming the container 100 is an aluminum alloy plate material having a thickness of 0.20 mm to 0.35 mm, laminated on both sides with a PET film of about 0.01 mm, similar to a well-known two-piece aluminum alloy beverage can. By using such a sheet material, when it is formed into a container, the bottom, where the thickness of the material is almost maintained, has a thickness of 0.20 mm to 0.35 mm, and the body 110, which is in the height range of 50±10% when the total height of the container is 100%, has a thickness of 0.10 to 0.22 mm.

[0026] When two containers 100 according to the present invention are completely stacked in the vertical direction, as shown in FIGS. 4 and 5, the outer surface of the outer rising portion 222 of the upper container 200 is (1) The inner surface of the constricted portion 314 of the lower container 300 (2) The inner surface of the lower part of the tapered portion 311 of the lower container 300 At least one of them comes into contact with each other. The outer surface of the tapered portion 211 of the upper container 200 and the inner surface of the tapered portion 311 of the lower container 300 do not come into close contact with each other. Note that "containers are completely stacked vertically" refers to a state in which the total height of two containers stacked on top of each other cannot be reduced any further.

[0027] At the top of the upper container 200, a protrusion 112 protrudes from the upper end of the lower container 300, and the protrusion height T of the protrusion 112 is determined by the height of the constricted portion, the shape of the bottom, and the like. In the example of FIG. 4, the protrusion height T is 8.0 mm, and the stack rate, which is the ratio of the protrusion height T of the protrusion 112 to the height H of the container 100, is 7.1%.

[0028] The metal molded article of the present invention, such as the container 100 described above, may be filled with a beverage or the like and then used as a can by attaching a lid member. The lid member may be any type, such as a metal stay-on tab lid, a laminated sheet, or a screw lid. When the lid member is fastened to the upper end of the cylindrical opening as a stay-on tab lid, the upper end of the cylindrical opening of the metal molded body needs to be in a state where it has been subjected to flanging processing to form a planar portion after trimming processing for fastening. When the lid member is a laminated sheet and bonded to the upper end of the cylindrical opening by heat or the like, the upper end of the cylindrical opening of the metal molded body may have a planar shape to ensure a sufficient bonding area. Examples of the laminated sheet include aluminum foil, paper, resin film, and laminate materials made by laminating two or more of these, and the sheet may further be laminated with a thermal adhesive layer (heat seal layer). Examples of the thermal adhesive layer include layers made of adhesives such as known sealant films, lacquer-type adhesives, easy-peel adhesives, and hot-melt adhesives. When the lid member is a screw lid and is screwed to the upper end of the cylindrical opening, the metal molded body may have a thread on a protruding portion such as the upper end of the cylindrical opening, or a separate lid member with a spout and a thread may be wrapped around the upper end of the cylindrical opening of the metal molded body to screw the screw lid. By matching the protrusion to the mounting configuration of the lid member, it is possible to improve the efficiency of storing and transporting the metal molded body portion, regardless of the type of lid member.

[0029] The above describes in detail a metal molded body (container) according to one embodiment of the present invention, but the metal molded body of the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present invention described in the claims. For example, the tapered portion 111 is not limited to being composed of a single inverted truncated cone panel, but may be composed of multiple panels arranged in the circumferential direction. In this case, the cross-section of the tapered portion 111 perpendicular to the axial direction may be a substantially polygonal shape, a bow shape consisting of an arc and a chord, a segmented circle shape where the bow is missing from a circle, or a combination of these shapes. Each panel has an outer peripheral surface and an inner peripheral surface that are smoothly continuous over the entire axial length of the body portion 110. An example of such a tapered portion is a diamond-cut portion. When the cross-sectional shape of the tapered portion 111 is substantially polygonal, the polygon is composed of, for example, straight line portions 111s and apex portions 111t, and the apex portions 111t are formed from arcs, as shown in Fig. 6. The radius of curvature of the arcs is 2 mm or more, and is set to 2 to 50 mm. Note that the straight line portions 111s may be formed from gentle curves with a larger radius of curvature than the arcs that form the apex portions 111t.

[0030] Furthermore, a metal molded product according to another embodiment of the present invention can also be a container 400 as follows. As shown in Fig. 7, container 400 according to another embodiment of the present invention has bottom 420 configured with chime portion 427 that gradually reduces in diameter downward, below outer rising portion 422 that continues from the lower end of waisted portion 114 of body 110, and other configurations are similar to those of container 100 according to one embodiment of the present invention described above. In Fig. 7, members having configurations similar to those of container 100 according to one embodiment of the present invention are denoted by the same reference numerals. Specifically, bottom 420 of container 400 has a dome portion 425 that convex upward (upward in FIG. 7 ) and a ring-shaped ground contact rim portion 421 that convex downward (downward in FIG. 7 ) from dome portion 425 in the radial direction outward. Ground contact rim portion 421 is shaped to maintain a stable upright position when container 400 is placed on horizontal plane F and upright. Ground contact rim portion 421 has a ground contact portion 423 that contacts horizontal plane F when placed on horizontal plane F, an outer raised portion 422 that extends radially outward above ground contact portion 423, a chime portion 427 that is interposed between outer raised portion 422 and ground contact portion 423 and gradually reduces in diameter as it extends downward, and an inner raised portion 424 that extends radially inward above ground contact portion 423. Outer raised portion 422 of ground contact rim portion 421 is connected to the lower end of necked portion 114 of body 110. The dome portion 425 and the inner raised portion 424 are similar to the dome portion 125 and the inner raised portion 124, respectively, of the container 100 according to the embodiment described above. Outer rising portion 422 is the portion extending from the upper end of chime portion 427 to the lower end of constricted portion 114. Outer rising portion 422 is arc-shaped with a single radius of curvature in a cross section including central axis X, and the radius of curvature of the arc in the cross section including central axis X is 0.5 to 5.0 mm, and is 2.3 mm in this embodiment. Outer rising portion 422 may also be substantially arc-shaped and made up of portions with multiple radii of curvature in a cross section including central axis X. [Explanation of symbols]

[0031] 100, 200, 300, 400...container 110 Torso 111 Tapered section 111s...Straight section 111t...Top 111z: Bottom end of tapered section 112...Protrusion 114 Waist 120, 420...bottom 121, 421....Touching rim part 122, 422....Outer rising part 122a: Uppermost end of outer raised part 123, 423...Grounding part 124, 424... Inner rising part 125, 425 Dome section 126...outer edge 427···Chime section 130 Cylindrical opening 131...Shoulder θ: Taper angle F: Placement surface H: Height of the container L: Imaginary line T Projection height X...center axis

Claims

1. A metal molded body having a bottom, a body, and a cylindrical opening, the bottom portion has an outer raised portion extending outward and upward; The body portion has a tapered portion that widens outward as it extends upward and a constricted portion that convex inward, the constricted portion is present between the tapered portion and the outer rising portion and is formed by a curve, The radius of curvature of the outer rising portion is 0.5 to 5.0 mm, The radius of curvature of the curve constituting the constricted portion is 10 to 500 mm, the tapered portion has a cross section perpendicular to the axial direction of the body portion that is circular, substantially polygonal, or a combination thereof; the tapered portion does not have a step portion and has a shape in which the diameter continuously increases over the entire axial length of the body portion, When two of the metal molded bodies are stacked in the vertical direction, a protrusion at the top of the upper metal molded body protrudes beyond the top end of the lower metal molded body, an outer surface of the outer rising portion of the upper metal forming body abuts against an inner surface of the necked portion of the lower metal forming body; an outer surface of the tapered portion of the upper metal molding and an inner surface of the tapered portion of the lower metal molding do not come into contact with each other; A metal molding, characterized in that the inner surface between the constricted portion and the protrusion of the lower metal molding does not contact the outer surface between the constricted portion and the protrusion of the upper metal molding.

2. 2. The metal molded body according to claim 1, wherein the diameter of the body at any point is equal to or greater than the diameter of the uppermost end of the outer rising portion.

3. 3. The metal molded body according to claim 1, wherein the tapered portion is formed of a single panel or a plurality of panels arranged side by side in the circumferential direction.

4. 4. The metal formed product according to claim 3, wherein the panel has a peripheral surface that is smoothly continuous over the entire axial length of the body portion.

5. A metal molded body having a bottom, a body, and a cylindrical opening, the bottom portion has an outer raised portion extending outward and upward; The body portion has a tapered portion that widens outward as it extends upward and a constricted portion that convex inward, the constricted portion is present between the tapered portion and the outer rising portion and is formed by a curve, The radius of curvature of the outer rising portion is 0.5 to 5.0 mm, The radius of curvature of the curve constituting the constricted portion is 10 to 500 mm, the tapered portion has a cross section perpendicular to the axial direction of the body portion that is circular, substantially polygonal, or a combination thereof; the tapered portion does not have a step portion and has a shape in which the diameter continuously increases over the entire axial length of the body portion, When two of the metal molded bodies are stacked in the vertical direction, a protrusion at the top of the upper metal molded body protrudes beyond the top end of the lower metal molded body, an outer surface of the outer rising portion of the upper metal forming body abuts against an inner surface of a lower part of the tapered portion of the lower metal forming body; an outer surface of the tapered portion of the upper metal molding and an inner surface of the tapered portion of the lower metal molding do not come into contact with each other; A metal molding, characterized in that the inner surface between the constricted portion and the protrusion of the lower metal molding does not contact the outer surface between the constricted portion and the protrusion of the upper metal molding.

6. the bottom portion having a downwardly convex annular ground-contacting rim portion; 6. A metal molded body as described in any one of claims 1 to 5, wherein the grounding rim portion has a grounding portion that contacts the horizontal surface when placed on the horizontal surface, and an outer rising portion that extends upward and outward from the grounding portion.

Images