CN218288389U

CN218288389U - Lifting mechanism of stretch film packaging machine

Info

Publication number: CN218288389U
Application number: CN202222091216.6U
Authority: CN
Inventors: 李建国
Original assignee: Beijing Omori Packing Machinery Co ltd
Current assignee: Beijing Omori Packing Machinery Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2023-01-13
Anticipated expiration: 2032-08-09

Abstract

A stretch film wrapper lifting mechanism comprising: the cylinder body is arranged on a base of the stretch film packaging machine and located below a lower die of the stretch film packaging machine, a piston cavity is arranged in the cylinder body, the diameter of the piston cavity is larger than or equal to 160mm, a gas path opening is formed in the lower portion of the cylinder body, and the gas path opening is communicated with the piston cavity; the piston is arranged in the piston cavity, is matched with the size of the piston cavity and moves in the piston cavity along the up-and-down direction; one end of the lifting rod is connected with the piston, and the other end of the lifting rod is connected with the lower die; and the air compression pump is communicated with the air path port. By the upper part, the piston cavity and the piston can directly bear the downward force generated when the lower die works, and a complex connecting rod structure is not needed to be arranged for dispersing the force, so that the structure and the action of the equipment can be simplified, the equipment cost is reduced, and the maintenance cost is reduced.

Description

Lifting mechanism of stretch film packaging machine

Technical Field

The utility model relates to a equipment for packing technical field especially indicates a stretch film packaging machine hoist mechanism.

Background

In the stretch film packaging machine, a forming part and a vacuum part of the stretch film packaging machine are both provided with special lower die lifting mechanisms. The upper die of the forming part or the vacuum part is arranged at the upper end of the lower die lifting mechanism and fixed, and the lower die of the forming part or the vacuum part is arranged on a lifting platform of the lower die lifting mechanism. The lifting platform can drive the lower die to lift the lower die to a specified position along the direction vertical to the ground, and a series of actions such as forming, vacuumizing, sealing and the like of the packaging film are completed.

Although the lifting mechanism of the existing stretch film packaging machine can well complete lifting action, the structure is complex, a special mounting foot seat is needed, and a large number of rotating and sliding parts are needed, so that the regular maintenance and the maintenance are needed, and the mechanism cost is high. Therefore, a lifting mechanism of a stretch film packaging machine is needed, which can simplify the structure of the lifting mechanism and reduce the maintenance cost of the lifting mechanism.

SUMMERY OF THE UTILITY MODEL

In view of this, the main object of the present invention is to provide a lifting mechanism for stretch film packaging machine, which can simplify the structure of the equipment and reduce the maintenance cost of the equipment.

The application provides stretch film packaging machine hoist mechanism includes: the cylinder body is arranged on a base of the stretch film packaging machine and is positioned below a lower die of the stretch film packaging machine, a piston cavity is arranged in the cylinder body, the diameter of the piston cavity is more than or equal to 160mm, and a gas port is arranged at the lower part of the cylinder body and is communicated with the piston cavity; the piston is arranged in the piston cavity, is matched with the size of the piston cavity and moves in the piston cavity along the up-down direction; one end of the lifting rod is connected with the piston, and the other end of the lifting rod is connected with the lower die; and the air compression pump is communicated with the air path port.

By the above, the piston in the piston cavity can be driven to rise by the compressed air provided by the air compression pump, and the diameter of the piston cavity is set to be more than or equal to 160mm, so that the piston can directly bear the downward force generated when the lower die works after being connected with the lower die through the lifting rod, and the force is dispersed without arranging a complicated connecting rod structure. Therefore, the structure and the action of the equipment can be simplified, the equipment cost is reduced, and the maintenance cost is reduced.

In some embodiments, the piston cavity has a diameter of 500mm or less.

From this, set for less than or equal to 500mm through the diameter with the piston chamber to avoid the oversize, surpass the demand that bears of bed die to power, thereby avoid extravagant material, reduce equipment cost.

In some embodiments, further comprising: the sealing ring is arranged on the piston and positioned between the piston and the inner surface of the piston cavity; the guide piece, the guide piece sets up on the base, extends along upper and lower direction, the bed die with the guide piece sliding connection.

Through set up the sealing washer on the piston to avoid the air to let out by the gap between piston and the piston cavity inner surface, thereby can reduce the influence of losing heart to the precision of piston lifting height. Through setting up the guide, make the bed die reciprocate along the guide to can avoid the bed die to take place to rock when promoting, improve the stability of bed die. The damage to the sealing ring caused by shaking of the lower die can be avoided, so that the service life of the equipment is prolonged.

In some embodiments, further comprising: and the limiting piece is arranged at the upper end of the piston cavity and limits the piston in the piston cavity, and when the lower die is positioned at the highest point, the distance between the piston and the limiting piece is 3-5mm.

Therefore, when equipment breaks down, the piston is prevented from moving out of the piston cavity, and production accidents are avoided.

In some embodiments, further comprising: and the reset spring is in a stretching state, one end of the reset spring is connected with the lower die, and the other end of the reset spring is connected with the base.

By last, after the lower mould promoted and accomplished the packing action, can make lower mould and piston descend through the pulling force that reset spring provided, accomplish and reset to with the material separation of accomplishing the packing, make the material can get into next process.

In some embodiments, further comprising: and the vacuum pump is communicated with the gas path port.

By last, can produce the negative pressure in making the piston chamber through the vacuum pump to make piston and bed die after promoting descend, accomplish and reset, so that with the material separation of accomplishing the packing, make the material can get into next process.

In some embodiments, the electromagnetic valve further comprises a first electromagnetic valve and a second electromagnetic valve, wherein the first electromagnetic valve and the second electromagnetic valve are five-position three-way electromagnetic valves; the three interfaces of the first electromagnetic valve are respectively connected with the air inlet, the air compression pump and one interface of the second electromagnetic valve; and the other two interfaces of the second electromagnetic valve are respectively connected with the vacuum pump and the external atmosphere.

The first electromagnetic valve and the second electromagnetic valve are arranged, so that the connection of the air inlet and the air compression pump or the vacuum pump can be controlled, and the lifting and descending of the piston and the lower die can be controlled. Through an interface and the external atmosphere intercommunication that makes the second solenoid valve to can be before the gas circuit mouth switches before intercommunication air compression pump and vacuum pump, earlier with external atmosphere intercommunication, thereby make the atmospheric pressure in the piston chamber reply the ordinary pressure state earlier, avoid producing the noise and leading to the fact the impact to piston and other mechanisms too fast because of atmospheric pressure changes when switching between intercommunication air compression pump and vacuum pump.

In some embodiments, the electromagnetic valve further comprises a silencer, and the second electromagnetic valve is communicated with the outside atmosphere through the silencer.

By the above, the noise generated by the flowing of the gas when the piston cavity is communicated with the outside atmosphere can be reduced by arranging the silencer.

In some embodiments, a pressure relief valve is further included, the pressure relief valve being disposed between the air compressor pump and the first solenoid valve.

Therefore, the pressure of the compressed air provided by the air compression pump can be adjusted by arranging the pressure reducing valve, so that the force output by the piston to the lower die to move upwards is adjusted.

In some embodiments, further comprising a gas flow rate control valve disposed between the air compressor pump and the first solenoid valve.

Thus, the flow rate of the compressed air supplied from the air compressor pump can be adjusted by providing the gas flow rate control valve, thereby controlling the speed of the piston and the lower mold during lifting.

Drawings

FIG. 1 is a schematic structural diagram of a lifting mechanism of a stretch film wrapping machine according to an embodiment of the present application;

fig. 2 is a schematic view of another embodiment of the present application showing the connection of a lifting mechanism.

Description of the reference numerals

10 stretching the film packaging machine; 11 a base; 12, a lower die; 20 a lifting mechanism; 100 cylinder bodies; 110 a piston chamber; a 120-angry road junction; 130 limiting pieces; 200 pistons; 210 a lifting rod; 220 sealing ring; 300 an air compression pump; 400 a return spring; 500 vacuum pump; 600 a first solenoid valve; 700 a second solenoid valve; 800 a silencer; 900 pressure reducing valves; 1000 gas flow rate control valve; 1000 vacuum speed regulating valve.

Detailed Description

Next, the specific structure of the lifting mechanism 20 of the stretch film wrapping machine 10 in the embodiment of the present application will be described in detail with reference to the drawings.

Fig. 1 is a schematic view of a lifting mechanism 20 of a stretch film wrapping machine 10 according to an embodiment of the present application. As shown in fig. 1, the lifting mechanism 20 of the stretch film wrapping machine 10 in the embodiment of the present application includes a cylinder 100, a piston 200, a lifting rod 210, and an air compression pump 300. The cylinder 100 may be cylindrical, and is disposed on the base 11 of the stretch film wrapping machine 10 below the lower die 12 of the stretch film wrapping machine 10. A piston cavity 110 is arranged in the cylinder body 100, the piston cavity 110 is cylindrical, and the diameter of the piston cavity 110 is larger than or equal to 160mm. The lower portion of the cylinder body 100 is provided with an air passage opening 120, and the air passage opening 120 is communicated with the piston chamber 110. Specifically, the gas inlet opening 120 may be disposed at the middle position of the bottom end surface of the cylinder block 100 as shown in fig. 1, or disposed at the side surface of the cylinder block 100 close to the bottom, which is not limited thereto. The piston 200 is disposed in the piston chamber 110 to be adapted to the size of the piston chamber 110, and moves in the piston chamber 110 in the up-and-down direction. The lift pins 210 have one end connected to the piston 200 and the other end connected to the lower mold 12. The air compression pump 300 communicates with the air port 120.

The piston 200 in the piston chamber 110 can be driven to ascend by the compressed air supplied by the air compression pump 300, and the diameter of the piston chamber 110 is set to be 160mm or more, so that the downward force generated when the lower mold 12 operates can be directly received after the piston 200 is connected with the lower mold 12 by the lifting rod 210, and it is not necessary to provide a complicated connecting rod structure for force dispersion, for example. Therefore, the structure and the action of the equipment can be simplified, the equipment cost is reduced, and the maintenance cost is reduced.

Further, the diameter of the piston chamber 110 may be set to 500mm or less. Therefore, the piston cavity 110 and the piston 200 can be prevented from being oversized and exceeding the bearing requirement of the lower die 12 on force, so that the waste of materials is avoided, and the equipment cost is reduced.

As shown in fig. 1, the lifting mechanism 20 in the embodiment of the present application further includes a sealing ring 220 and a guide (not shown). A seal ring 220 is disposed on the piston 200 between the piston 200 and the inner surface of the piston chamber 110. The guide is arranged on the base 11 and extends in the up-down direction, and the lower die 12 is connected with the guide in a sliding manner. By providing the sealing ring 220 on the piston 200, air leakage from the gap between the piston 200 and the inner surface of the piston chamber 110 is avoided, and thus the influence of air leakage on the accuracy of the height increase of the piston 200 can be reduced. The guides may be vertically disposed slide rails that may be slidably coupled to the lower mold 12. Through setting up the guide, make lower mould 12 reciprocate along the guide to can avoid lower mould 12 to take place to rock when promoting, improve lower mould 12's stability. The damage to the sealing ring 220 caused by the shaking of the lower die 12 can be avoided, so that the service life of the equipment is prolonged.

As shown in fig. 1, the lifting mechanism 20 in the embodiment of the present application further includes a stopper piece 130. The limiting sheet 130 is arranged at the upper end of the piston cavity 110 to limit the piston 200 in the piston cavity 110, and when the lower die 12 is located at the highest point, the distance between the piston 200 and the limiting sheet 130 is 3-5mm. Therefore, when the equipment fails, the piston 200 can be prevented from moving out of the piston cavity 110, and production accidents can be avoided.

As shown in fig. 1, the lifting mechanism 20 in the embodiment of the present application further includes a return spring 400, and the return spring 400 is in a stretching state, and one end of the return spring is connected to the lower mold 12, and the other end of the return spring is connected to the base 11. Therefore, after the lower die 12 is lifted to complete the packaging action, the lower die 12 and the piston 200 can be lowered by the pulling force provided by the return spring 400 to complete the return, so that the lower die is separated from the packaged material, and the material can enter the next procedure.

Fig. 2 is a schematic diagram of another embodiment of the present application showing another way to control the downward movement of the piston 200 and the lower mold 12 by connecting the lifting mechanism 20. As shown in fig. 2, the lifting mechanism 20 in the embodiment of the present application may further include a vacuum pump 500, and the vacuum pump 500 is in communication with the air port 120. Therefore, the vacuum pump 500 can generate vacuum (about 0.2-0.3 mbar), and after the vacuum pump is communicated with the gas channel port 120, the air pressure in the piston cavity 110 can be lower than the external atmospheric pressure, so that the lifted piston 200 and the lower die 12 can descend to complete resetting, and the piston can be conveniently separated from the packaged material, and the material can enter the next procedure.

As shown in fig. 2, the lifting mechanism 20 in the embodiment of the present application may further include a first solenoid valve 600 and a second solenoid valve 700, where the first solenoid valve 600 and the second solenoid valve 700 are five-position three-way solenoid valves. Three ports of the first solenoid valve 600 are respectively connected to the gas port 120, one port of the air compressor 300 and one port of the second solenoid valve 700, and the other two ports of the second solenoid valve 700 are respectively connected to the vacuum pump 500 and the external atmosphere.

Specifically, in a standby state (where the lower mold 12 does not need to be driven to move upward), the first solenoid valve 600 and the second solenoid valve 700 can control the gas inlet 120 to communicate with the vacuum pump 500, so that the piston cavity 110 is in a vacuum state. In this case, even if the lower die 12 and the piston 200 receive an external force, the lower die 12 can be stably held at the lowest position.

When the lower mold 12 needs to move upwards, the first electromagnetic valve 600 and the second electromagnetic valve 700 control the gas port 120 to be disconnected from the vacuum pump 500, so that the gas port 120 is communicated with the external atmosphere, the gas pressure in the piston cavity 110 is restored to the normal pressure state, and the piston 200 is in a free state. The time for the gas port 120 to be communicated with the outside atmosphere can be set to be 0.1-0.2 second, so that the reaction speed of the equipment can be increased and the packaging production rhythm can be improved under the condition that the gas pressure in the piston 200 cylinder is recovered to the normal pressure state from enough time. In addition, when the gas port 120 is directly controlled by the first solenoid valve 600 and the second solenoid valve 700 and switched from the communication vacuum pump 500 to the communication air compression pump 300, huge noise and impact on the structure caused by sudden switching from the vacuum state to the compressed air state in the piston chamber 110 can be avoided.

When the air pressure in the piston chamber 110 is restored to the normal pressure state, the first electromagnetic valve 600 and the second electromagnetic valve 700 control the air port 120 to be disconnected from the outside atmosphere and keep disconnected from the vacuum pump 500, and the first electromagnetic valve 600 controls the air port 120 to be communicated with the air compression pump 300. Thus, the compressed air provided by the air compressor pump 300 enters the piston cavity 110 through the first solenoid valve 600, pushes the piston 200 to move upward, and further pushes the lower mold 12 to move upward to complete the packaging operation.

After the lower mold 12 finishes the packaging action, the first electromagnetic valve 600 disconnects the air passage port 120 from the air compression pump 300, the first electromagnetic valve 600 and the second electromagnetic valve 700 control the air passage port 120 to communicate with the outside atmosphere, so that the compressed air in the piston 200 cylinder and the first electromagnetic valve 600 is discharged to the atmosphere through the first electromagnetic valve 600 and the second electromagnetic valve 700, and the piston 200 cylinder is restored to the normal pressure state. The time for controlling the gas port 120 to be communicated with the outside atmosphere by the first electromagnetic valve 600 and the second electromagnetic valve 700 can be set to be 0.1-0.5 second, so that the reaction speed of the equipment can be increased and the packaging production rhythm can be improved under the condition that the gas pressure in the cylinder of the piston 200 is recovered to the normal pressure state from enough time. When the air pressure in the cylinder of the piston 200 is restored to the normal pressure state, the first solenoid valve 600 and the second solenoid valve 700 control the air port 120 to be communicated with the vacuum pump 500, so that the air in the cylinder of the piston 200 is pumped away, the piston 200 moves downward under the action of the atmospheric pressure, and the piston 200 and the lower mold 12 fall to the lowest position, thereby completing the resetting.

As shown in fig. 2, the lifting mechanism 20 in the embodiment of the present application may further include a muffler 800, and the second solenoid valve 700 is connected to the outside atmosphere through the muffler 800. By providing muffler 800, noise generated by the flow of gas when piston chamber 110 is open to the atmosphere can be reduced.

As shown in fig. 2, the lifting mechanism 20 in the embodiment of the present application may further include a pressure reducing valve 900, and the pressure reducing valve 900 is disposed between the air compression pump 300 and the first solenoid valve 600. By providing the pressure reducing valve 900, the pressure of the compressed air supplied from the air compressor pump 300 can be adjusted, thereby adjusting the amount of force that the piston 200 outputs to move the lower mold 12 upward.

As shown in fig. 2, the lifting mechanism 20 in the embodiment of the present application may further include a gas flow rate control valve 1000, and the gas flow rate control valve 1000 is disposed between the air compression pump 300 and the first solenoid valve 600. By providing the gas flow rate control valve 1000, the flow rate of the compressed air supplied from the air compressor pump 300 can be adjusted, and the speed of the piston 200 and the lower mold 12 during the lifting can be controlled.

As shown in fig. 2, the lifting mechanism 20 in the embodiment of the present application may further include a vacuum speed regulating valve 1100, and the vacuum speed regulating valve 1100 may be disposed between the vacuum pump 500 and the air channel port 120, and in particular, may be disposed between the vacuum pump 500 and the second electromagnetic valve 700 as shown in fig. 2. Thus, when the first solenoid valve 600 and the second solenoid valve 700 control the vacuum pump 500 to communicate with the gas port 120, the speed of gas extraction in the piston chamber 110 can be adjusted by providing the vacuum governor valve 1100. Therefore, the piston 200 can be prevented from rapidly descending due to the excessive speed of the gas in the piston chamber 110, thereby preventing the impact and the damage to the equipment.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stretch film wrapping machine hoist mechanism, comprising:

the cylinder body is arranged on a base of the stretch film packaging machine and is positioned below a lower die of the stretch film packaging machine, a piston cavity is arranged in the cylinder body, the diameter of the piston cavity is more than or equal to 160mm, and a gas port is arranged at the lower part of the cylinder body and is communicated with the piston cavity;

the piston is arranged in the piston cavity, is matched with the size of the piston cavity and moves in the piston cavity along the up-down direction;

one end of the lifting rod is connected with the piston, and the other end of the lifting rod is connected with the lower die;

and the air compression pump is communicated with the air path port.

2. The stretch film wrapping machine lifting mechanism of claim 1, wherein the piston cavity has a diameter of 500mm or less.

3. The stretch film wrapping machine lifting mechanism of claim 1, further comprising:

the sealing ring is arranged on the piston and positioned between the piston and the inner surface of the piston cavity;

the guide piece is arranged on the base and extends along the vertical direction, and the lower die is connected with the guide piece in a sliding mode.

4. The stretch film wrapping machine lifting mechanism of claim 1, further comprising:

and the limiting piece is arranged at the upper end of the piston cavity and limits the piston in the piston cavity, and when the lower die is positioned at the highest point, the distance between the piston and the limiting piece is 3-5mm.

5. The stretch film wrapping machine lifting mechanism of any one of claims 1-4, further comprising:

and the reset spring is in a stretching state, one end of the reset spring is connected with the lower die, and the other end of the reset spring is connected with the base.

6. The stretch film wrapping machine lifting mechanism of any one of claims 1-4, further comprising:

and the vacuum pump is communicated with the gas path port.

7. The stretch film wrapping machine lifting mechanism of claim 6, further comprising a first solenoid valve and a second solenoid valve, wherein the first solenoid valve and the second solenoid valve are five-position three-way solenoid valves; the three interfaces of the first electromagnetic valve are respectively connected with the air inlet, the air compression pump and one interface of the second electromagnetic valve; and the other two ports of the second electromagnetic valve are respectively connected with the vacuum pump and the external atmosphere.

8. The stretch film wrapper lifting mechanism of claim 7, further comprising:

and the second electromagnetic valve is communicated with the outside atmosphere through the silencer.

9. The stretch film wrapper lifting mechanism of claim 7, further comprising:

a pressure relief valve disposed between the air compressor pump and the first solenoid valve.

10. The stretch film wrapping machine lifting mechanism of claim 9, further comprising:

a gas flow rate control valve disposed between the air compression pump and the first solenoid valve.