Die for hemming lunch box

Abstract

The utility model discloses a mould for hemming a meal box, which comprises a forming mould, an oil immersion mould, a first hemming mould and a second hemming mould, the forming mould is used for carrying out punch forming on the box shape of the meal box, and an oil brushing component is arranged on the oil immersion mould and used for brushing oil on the inner side of the upper edge of the meal box. The first hemming die and the second hemming die are used for carrying out two-section hemming on the upper edge part of the meal box brushed with oil in sequence; according to the hemming lunch box mold disclosed by the utility model, a piece of pre-manufactured paper can be processed and formed into a finished lunch box with a hemming edge through sequential processing among the four groups of matched molds, and in the process, based on the arrangement of the oil immersion mold, the hemming can be smoother, the defective rate is lower, and the forming is easier; therefore, the hemming die is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of lunch box molds, and particularly relates to a mold for a crimped lunch box. Background Art

[0002] A stamping die is a special process equipment that processes materials (metals or non-metals) into parts (or semi-finished products) in cold stamping processing, and is called a cold stamping die (commonly known as a cold punching die). Stamping is a pressure processing method that, at room temperature, uses a die installed on a press to apply pressure to the material, causing it to separate or plastically deform, thereby obtaining the required parts.

[0003] In the prior art, lunch boxes are mostly made by gluing paper sheets with slits. This kind of lunch box is rather troublesome both in terms of quality and production. Secondly, in order to facilitate use, the upper edge of the lunch box is generally made with a crimp. However, the production of the crimp requires high requirements for the mold. Existing general molds are not only complex in structure, but also have a relatively high defective rate. Therefore, the prior art has also designed to use a stamping die to produce and manufacture lunch boxes. One of the characteristics of a stamping-molded lunch box compared to seam gluing is that the entire lunch box has no gaps. However, it is rather difficult to make a crimp with a stamping die. The reasons include that under the pressure of the die, additional bending is likely to occur between the raw material paper sheet and the die, resulting in the final formed product not conforming to the design. Summary of the Utility Model

[0004] In view of the prior art, the purpose of the present utility model is to provide a stamping die for the production of a lunch box with a crimped structure. The die of this embodiment is composed of multiple cooperating dies, and a lunch box product with a crimp is formed by successively processing a pre-made lunch box raw material sheet.

[0005] To achieve the above purpose, the technical solution adopted by the present utility model is as follows: A mold for a crimped lunch box includes a forming die, an oil dipping die, a first crimping die, and a second crimping die. The forming die is used for stamping and forming the box shape of the lunch box. The oil dipping die is provided with a brushing component for brushing oil on the inner side of the upper edge of the lunch box. The first crimping die and the second crimping die successively perform two-stage crimping on the upper edge part of the lunch box that has been brushed with oil. The forming die includes a fixed die with exhaust grooves at the bottom and a moving die that matches the fixed die. The brushing component includes an oil injection plate, oil injection holes, a brushing sponge, and an oil return plate. The oil return plate is provided with an oil groove. An oil return hole is further provided on the brushing component above the lowest depression of the oil dipping die relative to the oil groove. The oil return hole is used for an external oil suction component to extend into the oil groove to extract oil liquid and send it to the oil injection plate for circulating brushing.

[0006] As a further setting of the above solution, die A and die B are provided on both the first hemming die and the second hemming die, and the first hemming die and the second hemming die are respectively provided with a first hemming groove and a second hemming groove at the positions of die A and die B opposite to the hemming part of the lunch box.

[0007] As a further setting of the above solution, the oil injection hole is arranged on the oil injection plate, the oil injection plate is provided with an oil passage groove, and one end of the oil injection hole is respectively connected to the oil passage groove, and the other end of the opening is connected to the oil-brushing sponge.

[0008] As a further setting of the above solution, an installation clamping plate is fixed on the oil injection plate, and the installation clamping plate and the oil injection plate form a clamping groove for installing the oil-brushing sponge.

[0009] As a further setting of the above solution, an oil return plate is fixed at the bottom of the installation clamping plate, and the edge of the oil return plate is provided with a knife surface, and the bottom surface of the oil groove arranged thereon is inclined.

[0010] Beneficial effects: The present utility model discloses a mold for hemming lunch boxes, including a forming die, an oil-dipping die, a first hemming die and a second hemming die. The forming die is used for stamping and forming the box type of the lunch box. The oil-dipping die is provided with an oil-brushing assembly for brushing oil on the inner side of the upper edge of the lunch box. The first hemming die and the second hemming die sequentially perform two-stage hemming on the upper edge part of the oil-brushed lunch box. The hemming lunch box mold of the present utility model can process a pre-made piece of paper into a finished lunch box with a hem through the sequential processing among four sets of cooperating molds. In this process, due to the setting of the oil-dipping die, it can be more smooth during hemming, with a lower defective rate and easier to form, thus making the structure of the hemming die simple and convenient to operate. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of four sets of molds for the hemming lunch box of the present utility model.

[0012] Figure 2 It is a three-dimensional sectional view of four sets of molds for the hemming lunch box of the present utility model.

[0013] Figure 3 It is a schematic diagram of the internal structure of the oil-dipping die of the hemming lunch box of the present utility model.

[0014] Figure 4 It is a sectional view of the oil-dipping die of the hemming lunch box of the present utility model.

[0015] Reference numerals: 1, forming die; 11, exhaust groove; 12, moving die; 13, fixed die; 2, oil immersion die; 20, oil brushing assembly; 21, oil injection plate; 22, oil injection hole; 221, oil inlet hole; 23, oil brushing sponge; 24, oil return plate; 241, knife surface; 25, oil groove; 26, oil return hole; 27, oil passage groove; 28, installation clamping plate; 29, clamping groove; 3, first curling die; 30, pressing die A; 4, second curling die; 40, pressing die B; 5, first curling groove; 6, second curling groove; 7, finished lunch box. Detailed implementation manners

[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0017] As Figures 1-4 shown, a mold for curling a lunch box includes a forming die 1, an oil immersion die 2, a first curling die 3 and a second curling die 4. The forming die 1 is used for stamping and forming the box shape of the lunch box. The oil immersion die 2 is provided with an oil brushing assembly 20 for brushing oil on the inner side of the upper edge of the lunch box. The first curling die 3 and the second curling die 4 successively perform two-stage curling on the upper edge part of the lunch box that has been brushed with oil. The forming die 1 includes a fixed die 13 with an exhaust groove 11 at the bottom and a moving die 12 that matches the fixed die 13. The oil brushing assembly 20 includes an oil injection plate 21, an oil injection hole 22, an oil brushing sponge 23, and an oil return plate 24. The oil return plate 24 is provided with an oil groove 25. An oil return hole 26 is further provided on the oil injection plate 21 above the lowest point of the oil groove 25 on the oil immersion die 2. The oil return hole 26 is used for the oil pumping assembly to extend in and extract the oil liquid in the oil groove 25 and then send it to the oil injection plate 21 to supply the oil brushing sponge 23 for circulating oil brushing.

[0018] As a further setting of the above solution, pressing dies A 30 and pressing dies B 40 are provided on both the first curling die 3 and the second curling die 4. The pressing dies A 30 and pressing dies B 40 on the first curling die 3 and the second curling die 4 are respectively provided with a first curling groove 5 and a second curling groove 6 at the curling part of the lunch box. The radian of the first curling groove 5 and the second curling groove 6 increases successively. Through the pressing of the two curling grooves, the curling of the lunch box can be stamped and curled.

[0019] As a further setting of the above solution, the oil injection hole 22 is arranged on the oil injection plate 21. The oil injection plate 21 is provided with an oil passage groove 27. One end of the oil injection hole 22 is respectively connected to the oil passage groove 27, and the other end is open and connected to the oil brushing sponge 23.

[0020] As a further setting of the above solution, an installation clamping plate 28 is fixed on the oil injection plate 21. The installation clamping plate 28 and the oil injection plate 21 form a clamping groove 29 for installing the oil-brushing sponge 23. A return oil plate 24 is fixed at the bottom of the installation clamping plate 28. The edge of the return oil plate 24 has a knife surface 241, and the bottom surface of the oil groove 25 arranged thereon is inclined.

[0021] The mold of this embodiment includes four groups of lunch box stamping molds used in cooperation. By stamping the lunch box raw material sheets one by one with the four groups of molds, a crimped lunch box can be quickly formed. It includes a forming mold 1, an oil dipping mold 2, a first crimping mold 3, and a second crimping mold 4.

[0022] Among them, the forming mold 1 is used for stamping and forming the box type of the lunch box. As Figure 1 shown, the structure of the forming mold 1 is relatively simple, including a fixed mold 13 with an exhaust groove 11 at the bottom and a moving mold 12 matching the fixed mold 13.

[0023] An oil-brushing component 20 is arranged on the oil dipping mold 2 for brushing oil on the inner side of the upper edge of the lunch box. The oil-brushing component 20 includes an oil injection plate 21, an oil injection hole 22, an oil-brushing sponge 23, and a return oil plate 24. An oil groove 25 is arranged on the return oil plate 24. A return oil hole 26 is also arranged on the oil injection plate 21 above the lowest point of the oil groove 25 on the oil dipping mold 2. The return oil hole 26 is used for the oil pumping component to extend in and extract the oil liquid in the oil groove 25 and then send it to the oil injection plate 21 to supply the oil-brushing sponge 23 for circulating oil brushing. By brushing oil on the crimped part of the lunch box semi-finished product pressed by the forming mold 1, it is convenient for the next crimping process.

[0024] The first crimping mold 3 and the second crimping mold 4 perform two-stage crimping on the upper edge part of the oil-brushed lunch box in sequence. Their structures are simple and both include a pressing mold A30 and a pressing mold B40. The pressing mold A30 and the pressing mold B40 on the first crimping mold 3 and the second crimping mold 4 are respectively provided with a first crimping groove 5 and a second crimping groove 6 relative to the crimped part of the lunch box.

[0025] As a further setting of the above solution, the oil injection hole 22 provided on the oil immersion mold 2 of this embodiment is located on the oil injection plate 21, and an oil passage groove 27 is further provided on the oil injection plate 21. A clamping plate 28 is fixedly installed at the lower edge of the oil injection plate 21. The installation clamping plate 28 and the oil injection plate 21 form a clamping groove 29 for installing the oil-brushing sponge 23. The upper end of the oil injection hole 22 is located at the bottom surface of the oil passage groove 27, and the other end is located above the oil-brushing sponge 23. Driven by the pressure of the oil transportation equipment, the oil liquid is continuously pumped from the oil tank 25 into the oil passage groove 27 of the oil injection plate 21, and then flows down along the oil injection hole 22 to moisten the oil-brushing sponge 23. The oil-brushing sponge 23 abuts against the inner side surface of the lunch box to brush oil on it. When there is too much oil liquid, it will flow down along the inner wall of the lunch box. A return oil plate 24 is fixed at the bottom of the installation clamping plate 28. The edge of the return oil plate 24 is provided with a knife surface 241, and the bottom surface of the oil tank 25 provided thereon is inclined. Therefore, the oil liquid flowing down along the inner wall of the lunch box will be intercepted by the outer edge of the return oil plate 24 in the shape of the knife surface 241 and enter the oil tank 25 of the return oil plate 24 along the inclined knife surface 241. The bottom surface of the oil tank 25 is inclined towards one place. Therefore, the intercepted oil liquid will converge at the low-lying place. Although there is an oil absorption component extending from the oil return hole 26, it can be pumped and then transported into the oil passage groove 27 to circulate and moisten the oil-brushing sponge 23, enabling it to brush oil in a cycle.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A mold for a rolled lunch box, characterized in that: The invention comprises a forming die (1), an oiling die (2), a first curling die (3) and a second curling die (4), wherein the forming die (1) is used for stamping and forming a lunch box, the oiling die (2) is provided with an oiling assembly (20) for brushing oil on the inner side of the upper edge of the lunch box, the first curling die (3) and the second curling die (4) sequentially perform two-stage curling on the oiled upper edge of the lunch box, the forming die (1) comprises a fixed die (13) with an exhaust groove (11) at the bottom and a second curling assembly (20) connected to the fixed die ( 13) a movable mold (12) matched with the oil immersion mold (2), the oil brushing assembly (20) comprising an oil filling plate (21), an oil filling hole (22), an oil brushing sponge (23), and an oil return plate (24), the oil return plate (24) being provided with an oil groove (25), and the oil brushing assembly (20) above the lowest depression of the oil immersion mold (2) relative to the oil groove (25) is also provided with an oil return hole (26), the oil return hole (26) being used for an external oil suction assembly to extend into the oil groove (25) to extract oil and send it to the oil filling plate (21) for circulating oil brushing.

2. A mold for a rolled lunch box according to claim 1, characterized in that: The first curling die (3) and the second curling die (4) are both provided with a pressing die A (30) and a pressing die B (40), and the pressing die A (30) and the pressing die B (40) on the first curling die (3) and the second curling die (4) are respectively provided with a first curling groove (5) and a second curling groove (6) at the curling position of the lunch box.

3. The mold for a rolled lunch box according to claim 1, characterized in that: The oil injection hole (22) is arranged on the oil injection plate (21), and the oil injection plate (21) is provided with an oil path groove (27). One end of the oil injection hole (22) is connected to the oil path groove (27) and the other end of the opening is connected to the oil brush sponge (23).

4. The mold for a rolled lunch box according to claim 1, characterized in that: A mounting clamp (28) is fixed on the oil filling plate (21), and the mounting clamp (28) and the oil filling plate (21) form a clamping groove (29) for mounting an oil brushing sponge (23).

5. A mold for a rolled lunch box according to claim 4, characterized in that: An oil return plate (24) is fixed to the bottom of the mounting clamping plate (28), and the edge of the oil return plate (24) has a knife surface (241), and the bottom surface of the oil groove (25) arranged thereon is arranged in an inclined shape.

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