1. The vacuum sealing machine with high sealing flatness is characterized by comprising a machine case (1), wherein a gland (2) is arranged on the machine case (1), a heating module (3) is arranged on the lower side of the gland (2), an avoiding groove (11) is arranged on the upper side of the heating module (3), a vacuumizing area (12) is arranged on the inner side of the avoiding groove (11), and an expansion module (7) is arranged on the inner side of the vacuumizing area (12);

the expansion module (7) comprises an air cylinder (71) fixed on the inner side of the vacuum-pumping area (12), a push plate (72) connected to the output end of the air cylinder (71), a left driving assembly (73) fixed on the push plate, a right driving assembly (74), a left push rod (75) connected to the output end of the left driving assembly (73), and a right push rod (76) connected to the output end of the right driving assembly (74);

a clamping module (4) is arranged between the avoiding groove (11) and the vacuumizing area (12), the clamping module (4) comprises an upper pressing strip (41), a lower pressing strip (42) and a lifting assembly (43) for driving the lower pressing strip (42) to move up and down, a plurality of first air holes (411) are formed in the lower end of the upper pressing strip (41), and a plurality of second air holes (421) are formed in the upper end of the lower pressing strip (42);

the air-purifying machine is characterized in that an installation cavity (13) is arranged at the lower end of the machine case (1), a first vacuum pump (5) and a second vacuum pump (6) are fixed in the installation cavity (13), a first air duct (51) is connected between an air pumping port of the first vacuum pump (5) and a first air hole (411), a second air duct (52) is connected between an air pumping port of the first vacuum pump (5) and a second air hole (421), and a third air duct (61) is connected between an air exhaust port of the second vacuum pump (6) and the vacuumization area (12).

2. The vacuum sealing machine with high sealing flatness according to claim 1, characterized in that the left driving assembly (73) comprises a left motor (731) fixed on the push plate (72), a left lead screw (732) connected to the output end of the left motor (731), and a left slide block (733) matched with the left lead screw (732), the left push rod (75) is fixed at one end of the left slide block (733);

the right driving assembly (74) comprises a right motor (741) fixed on the push plate (72), a right screw rod (742) connected to the output end of the right motor (741), and a right sliding block (743) matched with the right screw rod (742), and the right push rod (76) is fixed at one end of the right sliding block (743).

3. The vacuum sealing machine with high sealing flatness according to claim 1, wherein the heating module (3) comprises a conductive heating film (31), a cathode conductive plate (32) and an anode conductive plate (33) connected to two ends of the conductive heating film (31), and the avoiding groove (11) is separately provided with a strip-shaped groove for accommodating the conductive heating film (31).

4. The vacuum sealing machine with high sealing flatness of claim 1, characterized in that, both ends of the gland (2) are rotatably connected with the machine box (1).

5. The vacuum sealing machine with high sealing flatness according to claim 1, wherein the lifting assembly (43) comprises a bracket (431) fixed on the inner side of the installation chamber (13), a motor (432) fixed on the bracket (431), a screw rod (433) connected to the output end of the motor (432), and a limiting plate (434) fixed on the lower end edge of the lower pressing bar (42), and a threaded hole (4341) matched with the screw rod (433) is arranged on the limiting plate (434).

6. The vacuum sealing machine with high sealing flatness according to claim 1, characterized in that the machine case (1) is further provided with a vent hole (15) communicated with the mounting chamber (13).

7. The vacuum sealing machine with high sealing flatness of claim 1, characterized in that the lower end of the machine box (1) is further provided with a lower cover plate (8).

8. The vacuum sealing machine with high sealing flatness of claim 1, characterized in that the machine box (1) is further provided with a control panel (9).

Background

Generally, a vacuum packaging machine is used for packaging food into a packaging bag, then the opening end of the packaging bag is placed into the vacuum packaging machine, air in the packaging bag is pumped out by using a vacuumizing module, and after a preset vacuum degree is reached, a sealing process is completed by using a heating module. The vacuum packaging machine in the prior art directly puts into the capper with the wrapping bag port during encapsulation usually, and direct encapsulation after the evacuation leads to wrapping bag port fold not flat because the wrapping bag atmospheric pressure reduces in the evacuation process, and partial position exists foldingly, seals the in-process because wrapping bag port position thickness is uneven, has the clearance of leaking out easily, seals the roughness relatively poor, influences sealed effect.

Disclosure of Invention

Aiming at the problems, the invention provides a vacuum sealing machine with high sealing flatness, wherein an expansion module is additionally arranged on the inner side of a vacuumizing area and used for opening an opening of a packaging bag, so that the upper end and the lower end of the packaging bag are not folded before heat sealing, and the sealing effect is good.

In order to achieve the purpose, the invention is solved by the following technical scheme:

a vacuum sealing machine with high sealing flatness comprises a machine case, wherein a gland is arranged on the machine case, a heating module is arranged on the lower side of the gland, an avoiding groove is formed in the upper side of the heating module, a vacuumizing area is arranged on the inner side of the avoiding groove, and an expansion module is arranged on the inner side of the vacuumizing area;

the expansion module comprises an air cylinder fixed on the inner side of the vacuum-pumping area, a push plate connected to the output end of the air cylinder, a left driving assembly, a right driving assembly, a left push rod connected to the output end of the left driving assembly and a right push rod connected to the output end of the right driving assembly, wherein the left driving assembly and the right driving assembly are fixed on the push plate;

a clamping module is arranged between the avoidance groove and the vacuumizing area, the clamping module comprises an upper pressing strip, a lower pressing strip and a lifting assembly for driving the lower pressing strip to move up and down, a plurality of first air holes are formed in the lower end of the upper pressing strip, and a plurality of second air holes are formed in the upper end of the lower pressing strip;

the machine case lower extreme is equipped with the installation cavity, be fixed with first vacuum pump, second vacuum pump in the installation cavity, the extraction opening of first vacuum pump with be connected with first air duct between the first gas pocket, the extraction opening of first vacuum pump still with be connected with the second air duct between the second gas pocket, the gas vent of second vacuum pump with be connected with the third air duct between the evacuation region.

Specifically, the left driving assembly comprises a left motor fixed on the push plate, a left screw rod connected to the output end of the left motor, and a left sliding block matched with the left screw rod, and the left push rod is fixed at one end of the left sliding block;

the right driving assembly comprises a right motor fixed on the push plate, a right screw rod connected to the output end of the right motor, and a right sliding block matched with the right screw rod, and the right push rod is fixed at one end of the right sliding block.

Specifically, the heating module comprises a conductive heating film, a cathode conductive plate and an anode conductive plate which are connected to two ends of the conductive heating film, and a strip-shaped groove for accommodating the conductive heating film is arranged below the avoidance groove.

Specifically, two ends of the gland are rotatably connected with the case.

Specifically, the lifting assembly comprises a support fixed on the inner side of the installation cavity, a motor fixed on the support, a screw rod connected to the output end of the motor, and a limiting plate fixed on the lower end edge of the lower pressing strip, wherein a threaded hole matched with the screw rod is formed in the limiting plate.

Specifically, the chassis is also provided with air holes communicated with the mounting cavity.

Specifically, the lower end of the case is also provided with a lower cover plate.

Specifically, the case is further provided with a control panel.

The invention has the beneficial effects that:

1. according to the vacuum packaging machine, the upper pressing plate and the lower pressing plate are additionally arranged at the front end of the vacuumizing area, the lower pressing plate can be driven to lift by the lifting assembly, the first air hole and the second air hole are respectively formed in the lower end face of the upper pressing plate and the upper end face of the lower pressing plate, the first air hole and the second air hole are communicated with the air suction port of the first vacuum pump, the upper pressing plate and the lower pressing plate can suck the upper end and the lower end of a packaging bag through the vacuumizing action of the first vacuum pump, and the opening of the packaging bag is opened through the lifting device;

2. the inside extension module that has increased of evacuation region for open the opening of wrapping bag, guarantee that the upper and lower both ends of wrapping bag do not have the fold, the extension subassembly includes the cylinder, the push pedal, left drive assembly, right drive assembly, left push rod, right push rod, during the use, open the wrapping bag opening through elevating gear earlier, drive through the cylinder again with left push rod, right push rod inserts the wrapping bag opening inboard, first vacuum pump stop work, drive left push rod at last, right push rod removes to opposite direction, make wrapping bag upper and lower both ends face shakeout, first vacuum pump starts once more and adsorbs, carry out subsequent evacuation after reseing, the hot pressing process, it has no fold or folding to have guaranteed its upper and lower both ends before the wrapping bag heat-seal, sealed respond well.

Drawings

Fig. 1 is a schematic structural diagram of a vacuum sealing machine with high sealing flatness according to the present invention.

Fig. 2 is a schematic structural diagram of a vacuum sealing machine with high sealing flatness according to the present invention.

Fig. 3 is a sectional view of the hold-down strip.

Fig. 4 is a front view of a vacuum sealing machine with high sealing flatness according to the present invention.

Fig. 5 is a cross-sectional view taken along the plane a-a in fig. 4.

Fig. 6 is a cross-sectional view taken along plane B-B of fig. 4.

The reference signs are: the device comprises a case 1, an avoiding groove 11, a vacuumizing area 12, an installation chamber 13, a connector 14, an air vent 15, a gland 2, a heating module 3, a conductive heating film 31, a cathode conductive plate 32, an anode conductive plate 33, a clamping module 4, an upper pressing bar 41, a first air vent 411, a lower pressing bar 42, a second air vent 421, a lifting assembly 43, a bracket 431, a motor 432, a screw 433, a limiting plate 434, a threaded hole 4341, a first vacuum pump 5, a first air duct 51, a second air duct 52, a second vacuum pump 6, a third air duct 61, a fourth air duct 62, an expansion module 7, an air cylinder 71, a push plate 72, a left driving assembly 73, a right driving assembly 74, a left push rod 75, a right push rod 76, a left motor 731, a left screw rod 732, a left slide block 733, a right motor 741, a right screw rod 742, a right slide block 743, a lower cover plate 8 and a control panel 9.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.

Referring to FIGS. 1-6:

a vacuum sealing machine with high sealing flatness comprises a machine case 1, wherein a gland 2 is arranged on the machine case 1, a heating module 3 is arranged on the lower side of the gland 2, an avoiding groove 11 is arranged on the upper side of the heating module 3, a vacuumizing area 12 is arranged on the inner side of the avoiding groove 11, and an expansion module 7 is arranged on the inner side of the vacuumizing area 12;

the expansion module 7 comprises an air cylinder 71 fixed on the inner side of the vacuum-pumping area 12, a push plate 72 connected to the output end of the air cylinder 71, a left driving component 73 fixed on the push plate, a right driving component 74, a left push rod 75 connected to the output end of the left driving component 73, and a right push rod 76 connected to the output end of the right driving component 74;

a clamping module 4 is arranged between the avoidance groove 11 and the vacuumizing area 12, the clamping module 4 comprises an upper pressing strip 41, a lower pressing strip 42 and a lifting assembly 43 for driving the lower pressing strip 42 to move up and down, a plurality of first air holes 411 are formed in the lower end of the upper pressing strip 41, and a plurality of second air holes 421 are formed in the upper end of the lower pressing strip 42;

the lower end of the case 1 is provided with an installation chamber 13, a first vacuum pump 5 and a second vacuum pump 6 are fixed in the installation chamber 13, a first air duct 51 is connected between an air exhaust port of the first vacuum pump 5 and a first air hole 411, a second air duct 52 is connected between the air exhaust port of the first vacuum pump 5 and a second air hole 421, and a third air duct 61 is connected between an air exhaust port of the second vacuum pump 6 and the vacuum-pumping area 12;

when the vacuum bag opening end unfolding device is used, the opening end of a packaging bag is placed between the upper pressing strip 41 and the lower pressing strip 42, the lower pressing strip 42 is driven to move upwards through the lifting assembly 43, the packaging bag is clamped between the upper pressing strip 41 and the lower pressing strip 42, the upper end of the packaging bag is firmly adsorbed on the lower end face of the upper pressing strip 41, the lower end of the packaging bag is firmly adsorbed on the upper end face of the lower pressing strip 42, the lifting assembly 43 is used for driving the lower pressing strip 42 to move downwards to enable the opening end of the packaging bag to be in an open state, the air cylinder 71 is started, the air cylinder 71 pushes the left push rod 75 and the right push rod 76 into the inner side of the opening end of the packaging bag, the first vacuum pump 5 stops working, finally, the left driving assembly 73 and the right driving assembly 74 respectively drive the left push rod and the right push rod to move in opposite directions to enable the upper end face and the lower end face of the packaging bag to be unfolded, then the first vacuum pump 5 starts adsorption again, the expansion module 7 resets, After the lifting assembly 43 drives the lower pressing bar 42 to move upwards, the second vacuum pump 6 is used for vacuumizing the vacuumizing area 12, air in the packaging bag is pumped away, finally, the heating module 3 is started, and the packaging bag is heated and sealed through the heating module 3.

Preferably, the left driving assembly 73 comprises a left motor 731 fixed on the push plate 72, a left lead screw 732 connected to the output end of the left motor 731, and a left sliding block 733 matched with the left lead screw 732, and the left push rod 75 is fixed at one end of the left sliding block 733;

the right driving assembly 74 comprises a right motor 741 fixed on the push plate 72, a right lead screw 742 connected to the output end of the right motor 741, and a right slider 743 matched with the right lead screw 742, and the right push rod 76 is fixed at one end of the right slider 743.

Preferably, the heating module 3 includes a conductive heating film 31, a cathode conductive plate 32 connected to two ends of the conductive heating film 31, and an anode conductive plate 33, and a strip-shaped groove for accommodating the conductive heating film 31 is separately provided below the avoiding groove 11.

Preferably, two ends of the gland 2 are rotatably connected with the case 1.

Preferably, the lifting assembly 43 includes a bracket 431 fixed inside the installation chamber 13, a motor 432 fixed on the bracket 431, a screw 433 connected to an output end of the motor 432, and a limit plate 434 fixed on a lower end edge of the lower bead 42, wherein the limit plate 434 is provided with a threaded hole 4341 matched with the screw 433.

Preferably, the cabinet 1 is further provided with an air vent 15 communicating with the installation cavity 13.

Preferably, the lower end of the cabinet 1 is further provided with a lower cover plate 8.

Preferably, the cabinet 1 is further provided with a control panel 9.

The above examples only show 1 embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.