Ultrathin aluminum foil meal box forming die

Abstract

The utility model discloses an ultrathin aluminum foil lunch box forming die, which relates to the technical field of lunch box processing, and comprises a concave die and a convex die, the bottom of the concave die is fixedly connected with an upper pressing plate, the edge of the upper pressing plate is provided with an annular groove along the circumferential direction, the top of the convex die is fixedly connected with a pressing ring matched with the annular groove, and the pressing ring is provided with an annular groove. A lower pressing plate driven by a linear driving mechanism to ascend and descend is arranged on the inner side of the pressing ring in a sliding mode. According to the ultrathin aluminum foil meal box forming die, in the punch forming process, the amount of aluminum foil needed for forming protrusions at the bottom of a meal box can be compensated, the aluminum foil is prevented from being excessively stretched and damaged, and the yield is guaranteed while the structural strength is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to meal box processing technical field, concretely is a kind of ultra-thin aluminium foil meal box forming die. BACKGROUND

[0002] For ultra-thin aluminium foil meal box, in order to enhance its structural stability, usually design convex rib structure in the four peripheral side walls and bottom of meal box. These convex ribs not only significantly improve the overall strength of aluminium foil meal box, also effectively reduce the deformation probability.

[0003] In current manufacturing process, the convex rib on side wall can obtain sufficient material support due to the characteristics of aluminium foil converging to center in stamping process, therefore not easy to be damaged. However, the formation of bottom convex rib is often accompanied by stretching of aluminium foil, to avoid material breakage caused by excessive stretching, the size of bottom convex rib is relatively limited, thereby affecting its potential for improving structural strength.

[0004] Therefore, it is necessary to provide an ultra-thin aluminium foil meal box forming die to solve the above problems. CONTENT OF UTILITY MODEL

[0005] (I) technical problem solved

[0006] The utility model aims at providing an ultra-thin aluminium foil meal box forming die to solve the problems raised in the above background.

[0007] (II) technical scheme

[0008] To achieve the above purpose, the utility model is implemented by the following technical scheme: an ultra-thin aluminium foil meal box forming die, comprising a female die and a male die, the bottom of the female die is fixedly connected with an upper pressing plate, the edge of the upper pressing plate is provided with an annular groove along its circumferential direction, the top of the male die is fixedly connected with a pressing ring matched with the annular groove, and the inner side of the pressing ring is slidably provided with a lower pressing plate driven to lift by a linear drive mechanism.

[0009] Preferably, the inner side of the female die is uniformly distributed with a plurality of protrusions, and the outer side of the male die is provided with grooves matched with the protrusions.

[0010] Preferably, the upper pressing plate and the lower pressing plate are both provided with exhaust holes.

[0011] Preferably, one end of the pressing ring protruding from the upper end surface of the male die is arc-shaped.

[0012] Preferably, the annular groove and the lower end surface of the upper pressing plate are arc-shaped.

[0013] Preferably, the linear drive mechanism is a pneumatic cylinder, the pneumatic cylinder is fixedly connected inside the male die, and the lower pressing plate is fixedly connected with the piston rod of the pneumatic cylinder.

[0014] Preferably, the linear driving mechanism is a spring.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the super-thin aluminum foil lunch box forming die has the following beneficial effects:

[0017] The super-thin aluminum foil lunch box forming die can compensate the amount of aluminum foil required for forming a protrusion on the bottom of the lunch box during the stamping forming process, avoids excessive stretching and breakage of the aluminum foil, and improves the structural strength while ensuring the yield. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a cross-sectional view of the concave die of the utility model;

[0019] Figure 2 is a cross-sectional view of the initial state of the convex die of the utility model;

[0020] Figure 3 is a cross-sectional view of the stamping state of the convex die of the utility model;

[0021] Figure 4 is a use state schematic view of the utility model.

[0022] In the figure: 1, concave die; 2, ring groove; 3, upper pressing plate; 4, protruding block; 5, pressing ring; 6, lower pressing plate; 7, air cylinder; 8, exhaust hole; 9, convex die; 10, concave groove; 12, upper die plate; 13, lower die plate. DETAILED DESCRIPTION

[0023] 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.

[0024] Please refer to Figures 1-4 As shown in the figure, a super-thin aluminum foil lunch box forming die includes a concave die 1 and a convex die 9, the bottom of the concave die 1 is fixedly connected with an upper pressing plate 3, the edge of the upper pressing plate 3 is provided with a ring groove 2 along the circumference thereof, the top of the convex die 9 is fixedly connected with a pressing ring 5 matched with the ring groove 2, and the inner side of the pressing ring 5 is slidably provided with a lower pressing plate 6 driven to lift by a linear driving mechanism.

[0025] The concave die 1 and the convex die 9 are respectively assembled on the upper die plate 12 and the lower die plate 13, the upper die plate 12 drives the concave die 1 to go down, the ring groove 2 is in contact with the lower pressing plate 6 in priority to press and form the bottom of the meal box, then the linear driving mechanism drives the lower pressing plate 6 to go down synchronously with the concave die 1, the pressing ring 5 presses the aluminum foil into the ring groove 2, in the process, the aluminum foil which is not pressed and formed is moved upward by traction to compensate the amount of aluminum foil required to form the protrusion at the ring groove 2, so as to avoid the aluminum foil from being excessively stretched and damaged, when the lower pressing plate 6 goes down to the limit position, the inner part of the concave die 1 and the outer wall of the convex die 9 are mutually attached to press and form the side wall of the meal box.

[0026] In order to improve the strength of the side wall of the meal box, the inner side of the concave die 1 is uniformly distributed with a plurality of protrusions 4, and the outer side of the convex die 9 is provided with grooves 10 matched with the protrusions 4. Preferably, the protrusions 4 are in strip shape. Under the cooperation of the protrusions 4 and the grooves 10, a plurality of convex edges are formed at the side wall of the meal box, so as to improve the structural strength and make it not easy to be deformed.

[0027] Specifically, the upper pressing plate 3 and the lower pressing plate 6 are both provided with exhaust holes 8. By arranging the exhaust holes 8, the gas on both sides of the aluminum foil can be discharged in the process of stamping and forming.

[0028] In order to avoid the aluminum foil from being damaged, one end of the pressing ring 5 protruding from the upper end surface of the convex die 9 is arc-shaped. The ring groove 2 is arc-shaped over the lower end surface of the upper pressing plate 3.

[0029] In some embodiments, the linear driving mechanism is a gas cylinder 7, the gas cylinder 7 is fixedly connected to the inner part of the convex die 9, and the lower pressing plate 6 is fixedly connected with the piston rod of the gas cylinder 7.

[0030] In some embodiments, the linear driving mechanism is a spring, the spring is located between the lower pressing plate 6 and the convex die 9. After the upper pressing plate 3 and the lower pressing plate 6 cooperate to press and form the bottom of the meal box, the upper pressing plate 3 continues to go down, and the spring is compressed under force; when the concave die 1 goes up away from the groove 10, the lower pressing plate 6 is reset under the action of the spring.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A mold for forming ultra-thin aluminum foil lunch boxes, comprising a concave mold (1) and a convex mold (9), characterized in that: The bottom of the die (1) is fixedly connected to an upper pressure plate (3), and the edge of the upper pressure plate (3) is provided with an annular groove (2) along its circumference. The top of the punch (9) is fixedly connected to a pressure ring (5) that is compatible with the annular groove (2), and the inner side of the pressure ring (5) is provided with a lower pressure plate (6) that is driven to rise and fall by a linear drive mechanism.

2. The ultra-thin aluminum foil lunchbox forming mold according to claim 1, characterized in that: The inner side of the die (1) is evenly distributed with a plurality of protrusions (4), and the outer side of the die (9) is provided with a groove (10) that matches the protrusions (4).

3. The ultra-thin aluminum foil lunch box forming mold according to claim 1, characterized in that: Both the upper pressure plate (3) and the lower pressure plate (6) are provided with exhaust holes (8).

4. The ultra-thin aluminum foil lunchbox forming mold according to claim 1, characterized in that: The end of the pressure ring (5) protruding from the upper surface of the punch (9) is arc-shaped.

5. The ultra-thin aluminum foil lunchbox forming mold according to claim 1, characterized in that: The annular groove (2) transitions to the lower end face of the upper pressure plate (3) in an arc shape.

6. The ultra-thin aluminum foil lunchbox forming mold according to claim 1, characterized in that: The linear drive mechanism is a cylinder (7), which is fixedly connected inside the punch (9), and the lower pressure plate (6) is fixedly connected to the piston rod of the cylinder (7).

7. The ultra-thin aluminum foil lunch box forming mold according to claim 1, characterized in that: The linear drive mechanism is a spring.

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