A lower die assembly

Abstract

The present invention relates to the technical field of packaging equipment, in particular to a lower die assembly. The lower die assembly is fixed on a machine through a fixed bottom plate. The lower die assembly includes a lower die and a lower die bottom plate. The lower die and the lower die bottom plate are fixedly connected. A plurality of cartridge cavities are configured on the lower die, and a guide shaft is inserted through each cartridge cavity. One end of the guide shaft is connected to a support piece, and the other end of the guide shaft is connected to the fixed bottom plate. The lower die moves up and down along the guide shaft. An auxiliary limiting member is connected to the fixed bottom plate. The auxiliary limiting member includes an auxiliary shaft and a limiting block. One end of the auxiliary shaft is fixedly connected to the fixed bottom plate, and the limiting block is installed at the other end of the auxiliary shaft. A receiving groove matching the limiting block is provided on the lower template. The present invention can solve the problem that the unreasonable structure of the lower die in the prior art affects the efficiency of the machine.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and specifically relates to a lower die assembly. Background Art

[0002] Vacuum replacement modified atmosphere packaging machines are generally applicable to the preservation of food. The air in the trays of the packaged food is extracted, and then different protective gases are filled according to different types of food to achieve the purpose of packaging food. The lower die in the existing modified atmosphere packaging machines does not have an auxiliary abutting surface, so the trays are prone to stacking when being pushed, and the pushing of the trays is not smooth. In addition, the internal empty space of the existing lower die is large, the vacuum pumping time is long, and the machine efficiency is low. Summary of the Invention

[0003] The purpose of the present invention is to provide a lower die assembly to solve the problem that the unreasonable structure of the lower die in the prior art affects the machine efficiency.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A lower die assembly, the lower die assembly is fixed on the machine through a fixed bottom plate, the lower die assembly includes a lower die and a lower die bottom plate, the lower die and the lower die bottom plate are fixedly connected, a plurality of tray cavities are arranged on the lower die, a guide shaft is inserted through each tray cavity, one end of the guide shaft is connected to a support piece, the other end of the guide shaft is connected to the fixed bottom plate, the lower die moves up and down along the guide shaft, an auxiliary limiting member is connected to the fixed bottom plate, the auxiliary limiting member includes an auxiliary shaft and a limiting block, one end of the auxiliary shaft is fixedly connected to the fixed bottom plate, the limiting block is installed at the other end of the auxiliary shaft, and a receiving groove matching the limiting block is provided on the lower template.

[0005] Preferably, the number of the auxiliary limiting members is the same as and corresponds to the number of the tray cavities one by one, and the limiting surface of the limiting block faces the tray cavity.

[0006] Preferably, a first sealing ring is sleeved on the guide shaft, and a matching guide sleeve is provided on the guide shaft.

[0007] Preferably, a second sealing ring is sleeved on the auxiliary shaft.

[0008] Preferably, a groove matching the size of the tray is circumferentially formed in the inner circumference of the opening of the tray cavity, and a silica gel gasket is provided in the groove.

[0009] Preferably, a groove is further formed on the tray cavity, an air extraction hole is processed on the groove, the air extraction hole is communicated with a vacuum pumping channel, and the vacuum pumping channel is further communicated with the lower part of the tray cavity.

[0010] Preferably, an inclined surface is processed on the side of the groove, and a plurality of inclined holes are processed on the inclined surface. The inclined holes are communicated with an air filling port on the lower die through a transition hole on the lower die.

[0011] Preferably, a long groove penetrating up and down is formed in the lower die, the long groove is communicated with the vacuum pumping channel, the long groove matches the size of the upper groove on the upper die, and when the upper die and the lower die are closed, the long groove is communicated with the upper groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present application is provided with an auxiliary limiting member, which provides an auxiliary abutting surface for the material box when pushing the material box, prevents the material boxes from stacking, and enables the material box to be smoothly pushed in the middle of the mold; the space of the lower die is reasonably arranged, and the free space is small, greatly reducing the vacuum pumping time and improving the production efficiency of the machine; the lower die is provided with a separate inflation hole, and when inflating, the gas can directly reach the material box opening, reducing the time for filling the protective gas and improving the production efficiency; in addition, a long groove is provided, and when the upper and lower molds are closed, the vacuum pumping channels of the upper and lower mold components are communicated, so that there is no pressure difference between the upper and lower mold components, which is beneficial to the smooth operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an exploded schematic view of the present invention;

[0014] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0015] Figure 3 is a cross-sectional view of the material box cavity in the present invention;

[0016] Figure 4 is a partial cross-sectional view of the present invention.

[0017] In the figure: 1 fixed bottom plate, 2 lower die bottom plate, 3 lower die, 31 material box cavity, 32 receiving groove, 33 groove, 331 air extraction hole, 332 inclined surface, 333 inclined hole, 34 mold cavity, 35 transition hole, 36 vacuum pumping channel, 37 long groove, 38 inflation port, 4 guide shaft, 5 support piece, 6 material box, 7 auxiliary shaft, 8 limit block, 9 first sealing ring, 10 guide sleeve, 11 second sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-4, the present invention provides a technical solution: a lower die assembly. The lower die assembly is fixed on a machine through a fixed bottom plate 1 and is driven by a driving device. The driving device can adopt a cylinder or a motor, etc. in the prior art, and the driving device will not be elaborated here. The lower die assembly includes a lower die 3 and a lower die bottom plate 2. The lower die 3 and the lower die bottom plate 2 are fixedly connected. A plurality of cartridge cavities 31 are arranged on the lower die 3. A guide shaft 4 is inserted through each cartridge cavity 31. One end of the guide shaft 4 is connected to a support piece 5, and the other end of the guide shaft 4 is connected to the fixed bottom plate 1. The lower die 3 moves up and down along the guide shaft 4. Among them, the support piece 5 matches the shape and size of the cartridge cavity 31. When the cartridge 6 is pushed into the die, the cartridge 6 is positioned on the support piece 5. Further, an auxiliary limiting member is connected to the fixed bottom plate 1. The auxiliary limiting member includes an auxiliary shaft 7 and a limiting block 8. One end of the auxiliary shaft 7 is fixedly connected to the fixed bottom plate 1, and the limiting block 8 is installed at the other end of the auxiliary shaft 7. A receiving groove 32 matching the limiting block 8 is provided on the lower die 3. The number of the auxiliary limiting members is the same as that of the cartridge cavities 31 and they are in one-to-one correspondence. The limiting surface of the limiting block 8 faces the cartridge cavity 31. Specifically, when the lower die 3 is in the lower position, the limiting block 8 protrudes above the upper plane of the lower die 3. When pushing the cartridge 6, the inner side surface of the cartridge 6 leans against the limiting surface of the limiting block 8, making the cartridge pushing smooth. When the lower die 3 rises, the limiting block 8 falls into the receiving groove 32 of the lower die 3 and is lower than the lower plane of the groove 33, that is, the top plane of the limiting block 8 is lower than the cutting edge of the cutting tool. In this way, the cutting tool will not touch the limiting block 8 when cutting down, and the cutting tool will not be damaged.

[0020] Further, a groove 34 matching the size of the cartridge 6 is circumferentially provided on the inner periphery of the opening of the cartridge cavity 31. A silica gel gasket is provided in the groove 34. A groove 33 is also provided on the cartridge cavity 31. An air extraction hole 331 is processed on the groove 33. The air extraction hole 331 is communicated with an air extraction channel 36. The air extraction channel 36 is also communicated with the lower part of the cartridge cavity 31. When extracting vacuum, since only the cartridge cavity 31 and the air extraction channel 36 are left in the lower die 3, the space that needs to be evacuated is very small, so the vacuum extraction time is short, improving the working efficiency of the machine.

[0021] Preferably, a first sealing ring 9 is sleeved on the guide shaft 4, and a guide sleeve 10 is provided for the guide shaft 4.

[0022] Preferably, a second sealing ring 11 is sleeved on the auxiliary shaft 7.

[0023] Preferably, an inclined surface 332 is processed on the side surface of the groove 33. A plurality of inclined holes 333 are processed on the inclined surface 332. The inclined holes 333 are communicated with an inflation port 38 on the lower die 3 through a transition hole 35 on the lower die 3. This inflation port 38 is not communicated with the air extraction channel 36, but is separately communicated with an external inflation pipeline. In this way, when filling the protective gas, the internal space of the cartridge 6 can be filled first.

[0024] Preferably, a long groove 37 penetrating through the upper and lower parts is further formed in the lower die 3. The long groove 37 is communicated with the vacuum pumping channel 36, and the size of the long groove 37 in the lower die 3 matches that of the upper groove in the upper die. When the upper die and the lower die 3 are closed, the long groove 37 in the lower die 3 is communicated with the upper groove in the upper die, so that the vacuum pumping space of the lower die 3 is communicated with the vacuum pumping space of the upper die, forming an integral vacuum pumping space. In this way, there is no pressure difference between the upper and lower die assemblies during vacuum pumping, and the vacuum pumping is more stable.

[0025] The lower die assembly provided by the present application is provided with an auxiliary limiting member, which provides an auxiliary abutting surface for the material box when pushing the material box, prevents the material boxes from stacking, and enables the material box to be smoothly pushed in the middle of the die; the lower die space is reasonably arranged with a small free space, greatly reducing the vacuum pumping time and improving the production efficiency of the machine; the lower die is provided with a separate gas charging hole, and the gas can directly reach the material box opening during gas charging, reducing the time for charging the protective gas and improving the production efficiency; in addition, a long groove is provided. When the upper and lower dies are closed, the vacuum pumping channels of the upper and lower die assemblies are communicated, so that there is no pressure difference between the upper and lower die assemblies, which is beneficial to the smooth operation.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lower die assembly, characterized in that: The lower die assembly is fixed to the machine through a fixed bottom plate (1). The lower die assembly includes a lower die (3) and a lower die bottom plate (2). The lower die (3) and the lower die bottom plate (2) are fixedly connected. A plurality of cartridge cavities (31) are arranged on the lower die (3). A guide shaft (4) is inserted through each cartridge cavity (31). One end of the guide shaft (4) is connected to a support piece (5), and the other end of the guide shaft (4) is connected to the fixed bottom plate (1). The lower die (3) moves up and down along the guide shaft (4). An auxiliary limiting member is connected to the fixed bottom plate (1). The auxiliary limiting member includes an auxiliary shaft (7) and a limiting block (8). One end of the auxiliary shaft (7) is fixedly connected to the fixed bottom plate (1), and the limiting block (8) is installed at the other end of the auxiliary shaft (7). A receiving groove (32) matching the limiting block (8) is provided on the lower die (3). The number of the auxiliary limiting members is the same as that of the cartridge cavities (31) and they are in one-to-one correspondence. The limiting surface of the limiting block (8) faces the cartridge cavity (31). A first sealing ring (9) is sleeved on the guide shaft (4), and a matching guide sleeve (10) is provided on the guide shaft (4). A second sealing ring (11) is sleeved on the auxiliary shaft (7). A groove (34) matching the size of the cartridge (6) is circumferentially formed in the inner periphery of the opening of the cartridge cavity (31), and a silica gel gasket is provided in the groove (34). A groove (33) is further formed on the cartridge cavity (31). An air extraction hole (331) is machined on the groove (33). The air extraction hole (331) is communicated with an air extraction channel (36), and the air extraction channel (36) is also communicated with the lower part of the cartridge cavity (31). An inclined surface (332) is machined on the side of the groove (33). A plurality of inclined holes (333) are machined on the inclined surface (332). The inclined holes (333) are communicated with an inflation port (38) on the lower die (3) through a transition hole (35) on the lower die (3). A long groove (37) penetrating up and down is formed on the lower die (3). The long groove (37) is communicated with the air extraction channel (36). The long groove (37) matches the size of the upper groove on the upper die. When the upper die and the lower die (3) are closed, the long groove (37) is communicated with the upper groove.

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