Scald-proof aluminum foil meal box and forming die thereof

Abstract

The utility model discloses an anti-scald aluminum foil meal box and a forming die thereof, and relates to the technical field of aluminum foil meal boxes, the anti-scald aluminum foil meal box comprises a box body, the edge of the box body is provided with an integrally-formed full-circumference curled edge, a box opening of the box body is bent towards the outer side of the box body to form folded edges and anti-scald lugs, and the folded edges and the anti-scald lugs are arranged at intervals. An anti-scalding aluminum foil meal box forming die is used for machining the anti-scalding aluminum foil meal box and comprises a female die and a male die, and the female die is arranged on the inner side of an upper shearing plate in a sliding mode and driven by a first air cylinder to ascend and descend. The position, corresponding to the upper shearing plate, of the outer side of the male die is sleeved with a blank holder driven by a second air cylinder to ascend and descend, and the outer side of the blank holder is sleeved with a lower shearing plate matched with the upper shearing plate. The anti-scald aluminum foil meal box is high in structural strength; the anti-scald aluminum foil meal box forming mold is low in layout cost and high in forming efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminium foil lunch box technical field, concretely is a kind of anti-scald aluminium foil lunch box and forming die. BACKGROUND

[0002] Aluminium foil lunch box is widely used in take-out, aviation meal and fast food field due to its light, environmental protection, high temperature resistance and other characteristics. However, the high thermal conductivity of aluminium material easily leads to scalding when holding high-temperature food, so anti-scald design becomes the key direction of its function optimization. The current mainstream scheme mainly designs through structure anti-scald, for example, anti-scald ear structure is additionally arranged at the edge of the lunch box to make the finger contact position away from the high-temperature center area.

[0003] The current anti-scald ear is directly cut and stamped into shape by aluminium foil, and its structural strength completely depends on the thickness of aluminium foil base material. Due to the lightweight demand of aluminium foil material, the thickness is relatively thin, which leads to insufficient structural strength of anti-scald ear, and the anti-scald effect and user experience are affected in the use process.

[0004] Therefore, it is necessary to provide an anti-scald aluminium foil lunch box and forming die to solve the above problems. INVENTION CONTENTS

[0005] (I) technical problem solved

[0006] The utility model aims at providing an anti-scald aluminium foil lunch box and forming die to solve the problems in the above background technology.

[0007] (II) technical scheme

[0008] To achieve the above purpose, the utility model is realized by the following technical scheme: an anti-scald aluminium foil lunch box, comprising a box body, an integrally formed full-circle edge is arranged at the edge of the box body, a folding edge and an anti-scald ear are formed by bending the box opening of the box body to its outer side, and the folding edge and the anti-scald ear are arranged at intervals.

[0009] Preferably, the anti-scald ear has two, and the two anti-scald ears are symmetrically distributed on both sides of the box body.

[0010] An anti-scald aluminium foil lunch box forming die is used for processing the above anti-scald aluminium foil lunch box, comprising a concave die and a convex die, the concave die is slidably arranged on the inner side of the upper shear plate and is driven to lift by the first cylinder;The outer side of the convex die is provided with a pressure pad ring driven to lift by the second cylinder at the position corresponding to the upper shear plate, and the outer side of the pressure pad ring is provided with a lower shear plate matched with the upper shear plate;

[0011] The arc-shaped pressing strip driven to lift by the third cylinder is arranged between the concave die and the upper shear plate, and the arc-shaped pressing strip has two, and the two arc-shaped pressing strips are symmetrically distributed on both sides of the concave die.

[0012] The arc-shaped flanging strips driven by the fourth cylinder to lift are arranged between the punch and the blank holder, and the two arc-shaped flanging strips are arranged at positions corresponding to the positions of the two arc-shaped pressing strips.

[0013] The upper shearing plate is provided with an upper flanging groove and a lower flanging groove on the side adjacent to the blank holder.

[0014] Preferably, the upper shearing plate and the first cylinder are fixedly connected with the upper die plate, and the punch, the second cylinder and the lower shearing plate are fixedly connected with the lower die plate.

[0015] Preferably, the outer side of the upper shearing plate is sleeved with a discharging plate which is slidingly connected with the upper die plate.

[0016] Preferably, the upper flanging groove and the lower flanging groove are combined to form an annular cavity with an opening on the inner side, and the annular cavity has a circular cross section.

[0017] Preferably, the shapes of the arc-shaped pressing strips and the arc-shaped flanging strips are adapted to the shape of the flanging.

[0018] Beneficial effects

[0019] Compared with the prior art, the utility model provides a kind of anti-scald aluminium foil lunch box and its forming die, with the following beneficial effects:

[0020] 1、The anti-scald aluminium foil lunch box is taken out by setting anti-scald ear to box body, so that the finger contact position is away from the high temperature center area, to avoid scalding;The connecting portion of flanging and anti-scald ear forms triangular support structure, and is supported by edge crimping, which can effectively increase the structural strength of anti-scald ear, and avoid deformation.

[0021] 2、The forming die of the anti-scald aluminium foil lunch box can realize the processing of the anti-scald aluminium foil lunch box by adding arc-shaped pressing strips and arc-shaped flanging strips on the basis of the original forming die, only needs to adjust the local structure of the die, reduces the research and development and manufacturing cost;At the same time, it can complete the forming of anti-scald ear by adding flanging process in the existing stamping forming process, which has high forming efficiency. DRAWINGS

[0022] Figure 1 It is the sectional view of the structure of the utility model;

[0023] Figure 2 It is the enlarged view of A of the utility model; Figure 1

[0024] Figure 3 It is the front view of the concave die of the utility model;

[0025] Figure 4 It is the front view of the punch of the utility model; ​

[0026] Figure 5 It is a three-dimensional schematic view of the box body of the utility model.

[0027] In the figure: 1, upper die plate; 2, first air cylinder; 3, concave die; 4, upper shear plate; 5, unloading plate; 6, lower shear plate; 7, edge ring; 8, convex die; 10, lower die plate; 11, second air cylinder; 12, guide column; 13, upper edge curling groove; 14, lower edge curling groove; 15, third air cylinder; 16, arc-shaped pressing strip; 17, arc-shaped edge folding strip; 18, fourth air cylinder; 20, box body; 21, edge folding; 22, edge curling; 23, anti-scald lug. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0029] Please refer to Figure 5 As shown in the figure, an anti-scald aluminum foil lunch box is provided, which comprises a box body 20, the edge of the box body 20 is provided with an integrally formed full-circle edge curling 22, the box opening of the box body 20 is bent outward to form an edge folding 21 and an anti-scald lug 23, and the edge folding 21 and the anti-scald lug 23 are arranged at intervals. Preferably, the anti-scald lug 23 has two, and the two anti-scald lugs 23 are symmetrically distributed on the two sides of the box body 20.

[0030] The box body 20 is taken and placed by the anti-scald lug 23, so that the position of the finger contact is far away from the high-temperature center area, thereby avoiding scalding; meanwhile, the connection between the edge folding 21 and the anti-scald lug 23 forms a triangular support structure, and is assisted by the edge curling 22 to support, which can effectively increase the structural strength of the anti-scald lug 23, and avoid deformation.

[0031] Please refer to Figures 1-5 As shown in the figure, an anti-scald aluminum foil lunch box forming die is used for processing the above anti-scald aluminum foil lunch box, which comprises a concave die 3 and a convex die 8, the concave die 3 is slidably arranged on the inner side of an upper shear plate 4 and is driven to lift by a first air cylinder 2; the outer side of the convex die 8 is provided with an edge ring 7 driven to lift by a second air cylinder 11 at a position corresponding to the upper shear plate 4, the outer side of the edge ring 7 is provided with a lower shear plate 6 matched with the upper shear plate 4, the concave die 3 and the upper shear plate 4 are provided with an arc-shaped pressing strip 16 driven to lift by a third air cylinder 15, the arc-shaped pressing strip 16 has two, and the two arc-shaped pressing strips 16 are symmetrically distributed on the two sides of the concave die 3; the convex die 8 and the edge ring 7 are provided with an arc-shaped edge folding strip 17 driven to lift by a fourth air cylinder 18, the arc-shaped edge folding strip 17 has two, and the position distribution of the two arc-shaped edge folding strips 17 corresponds to the position of the two arc-shaped pressing strips 16; the upper shear plate 4 is provided with an upper edge curling groove 13 and a lower edge curling groove 14 on the side adjacent to the edge ring 7.

[0032] Specifically, the upper shear plate 4 and the first cylinder 2 are both fixedly connected to the upper template 1, and the punch 8, the second cylinder 11, and the lower shear plate 6 are all fixedly connected to the lower template 10. To facilitate the positioning of the aluminum foil, a stripper plate 5 that is slidably connected to the upper template 1 is fitted on the outer side of the upper shear plate 4. The shapes of the arc-shaped pressure strip 16 and the arc-shaped folding strip 17 are adapted to the shape of the folding edge 21.

[0033] Specifically, the upper edge-curling groove 13 and the lower edge-curling groove 14 combine to form an annular cavity with an opening on the inner side, and the cross-section of the annular cavity is circular. By using a cavity with a circular cross-section, the edge of the aluminum foil can be rolled and formed.

[0034] The stamping process for aluminum foil lunch boxes includes the following steps:

[0035] Material cutting: The initial state of die 3 is as follows Figure 1 As shown, the upper template 1 is driven by the stamping equipment to move down along the guide post 12. When the unloading plate 5 contacts the lower shear plate 6, it clamps the aluminum foil. Then the upper shear plate 4 contacts the pressure ring 7 and moves down synchronously. Under the action of the upper shear plate 4 and the lower shear plate 6, the aluminum foil is punched.

[0036] Forming: As the concave mold 3 and the convex mold 8 align, they pull the aluminum foil sheet towards the center and press it into shape. At this time, the upper template 1 moves down to the limit position, and the edge of the aluminum foil sheet moves into the lower edge groove 14.

[0037] Edge curling: Then the upper template 1 moves upward, the second cylinder 11 drives the pressing ring 7 to move upward synchronously with the upper shear plate 4, the concave mold 3 continues to press the box body 20 under the action of the first cylinder 2, and the edge of the aluminum foil plate curls and forms an edge curl 22 under the action of the upper edge curling groove 13 and the lower edge curling groove 14.

[0038] Edge processing: The upper template 1 continues to move upward, the second cylinder 11 drives the pressing ring 7 downward, and the concave mold 3 continues to press the box body 20 under the action of the first cylinder 2 so that the rolled edge 22 is separated from the upper rolled edge groove 13 and the lower rolled edge groove 14. Then the third cylinder 15 drives the arc-shaped pressing strip 16 upward to avoid the arc-shaped pressing strip 16 interfering with the forming of the folded edge 21. Finally, the fourth cylinder 18 drives the arc-shaped folding strip 17 upward to bend the edge of the box body 20 to form the folded edge 21.

[0039] Demolding: The fourth cylinder 18 drives the arc-shaped folding strip 17 to reset, and then the upper template 1 moves upward to reset. Because the box body 20 has a certain amount of springback, it fits tightly with the concave mold 3, thereby driving it to detach from the convex mold 8. The third cylinder 15 drives the arc-shaped pressure strip 16 to reset. The arc-shaped pressure strip 16 acts on the folding edge 21 to push the box body 20 out of the concave mold 3, thereby achieving automatic demolding.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heatproof aluminium foil lunch box comprising a box body (20), characterized in that: The edge of the box body (20) is provided with an integrally formed full-circumferential flange (22), the box opening of the box body (20) is bent outward to form a flange (21) and an anti-scald lug (23), and the flange (21) and the anti-scald lug (23) are arranged at intervals.

2. The anti-scald aluminum foil meal box according to claim 1, wherein: The anti-scald lug (23) has two anti-scald lugs (23) symmetrically distributed on both sides of the box body (20).

3. An anti-scald aluminum foil lunch box forming die for processing the anti-scald aluminum foil lunch box according to any one of claims 1-2, comprising a concave die (3) and a convex die (8), the concave die (3) is slidably arranged on the inner side of an upper shear plate (4) and is driven to lift by a first cylinder (2); the outer side of the convex die (8) is sleeved with a pressure ring (7) driven to lift by a second cylinder (11) at a position corresponding to the upper shear plate (4), and the outer side of the pressure ring (7) is sleeved with a lower shear plate (6) matched with the upper shear plate (4), characterized in that: An arc-shaped pressing strip (16) driven to lift by a third cylinder (15) is arranged between the concave die (3) and the upper shear plate (4), and the arc-shaped pressing strip (16) has two arc-shaped pressing strips (16) symmetrically distributed on both sides of the concave die (3); An arc-shaped flange strip (17) driven to lift by a fourth cylinder (18) is arranged between the convex die (8) and the pressure ring (7), and the arc-shaped flange strip (17) has two arc-shaped flange strips (17) whose positions correspond to the positions of the two arc-shaped pressing strips (16); An upper flange groove (13) and a lower flange groove (14) are respectively arranged on the side of the upper shear plate (4) adjacent to the pressure ring (7).

4. The forming die for anti-scald aluminum foil meal boxes according to claim 3, characterized in that: The upper shear plate (4) and the first cylinder (2) are fixedly connected with an upper die plate (1), and the convex die (8), the second cylinder (11) and the lower shear plate (6) are fixedly connected with a lower die plate (10).

5. The forming die for anti-scald aluminum foil meal boxes according to claim 3, characterized in that: The outer side of the upper shear plate (4) is sleeved with a stripper plate (5) slidably connected with the upper die plate (1).

6. The forming die for anti-scald aluminum foil meal boxes according to claim 3, characterized in that: The upper flange groove (13) and the lower flange groove (14) combine to form an annular cavity with an opening on the inner side, and the cross section of the annular cavity is circular.

7. The forming die for anti-scald aluminum foil meal boxes according to claim 3, characterized in that: The shapes of the arc-shaped pressing strip (16) and the arc-shaped flange strip (17) are matched with the shape of the flange (21).

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