CN111268227A - Automatic labeling machine for soft bottles and labeling method thereof - Google Patents

Abstract

The present invention relates to an automatic labeling machine for soft bottles, comprising a workbench on which a rack, a horizontal transport device for transporting soft bottles, and raw materials with an inner cavity for storing labels to be used are installed. A box and a labeling mechanism, characterized in that: the rack on the input side of the labeling mechanism is provided with a purifying and air-drying device for removing water vapor and water droplets on the outer wall of an unlabeled soft bottle, and the purifying and air-drying device includes an air-drying casing body, an execution part, and a purification air-drying system arranged inside the air dryer shell; the air dryer shell is fixedly installed on the frame; the execution part includes an output cover and a lift drive used to drive the output cover to reciprocate up and down part. The labeling machine of the invention has high labeling efficiency and good labeling quality.

Description

A kind of automatic labeling machine for soft bottle and labeling method thereof

technical field

The invention relates to the technical field of packaging machinery, in particular to an automatic labeling machine for soft bottles and a labeling method thereof.

Background technique

In the process of beverage production, many beverages are canned in soft bottles. After the soft bottles have been sterilized and canned, labels need to be pasted on their outer walls to display relevant product information. At present, the more mature labeling machines on the market use the labeling mechanism to stick the label on the soft bottle, and then use the labeling mechanism to smooth the label to the soft bottle; after using the soft bottle after disinfection and cans are usually processed in a lower temperature environment. When transported to the labeling machine, the outside temperature is high at this time, and water droplets will appear on the surface of the soft bottle, which will affect the labeling work. If the room temperature is lowered by using After the labeling is completed, water droplets appear on the surface of the packaged soft bottle at room temperature, and the label is easy to fall off; secondly, because the bottle body of the soft bottle is soft, there will be depressions during the labeling process, which will affect the labeling. completion of work.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide an automatic labeling machine for soft bottles and a labeling method thereof.

The technical scheme of the present invention is achieved as follows: an automatic labeling machine for soft bottles, comprising a workbench, on which a rack, a horizontal transport device for transporting soft bottles, and a label for storing ready-to-use labels are installed. A raw material box with an inner cavity and a labeling mechanism, characterized in that: the rack on the input side of the labeling mechanism is provided with a purification air-drying device for removing water vapor and water droplets on the outer wall of the unlabeled soft bottle, and the The purifying and air-drying device includes an air-drying machine housing, an executive component, and a purifying and air-drying system arranged inside the air-drying machine housing; the air-drying machine housing is fixedly installed on the rack; the executive component includes an output cover and a drive output The lifting and lowering driving part of the cover reciprocates up and down.

Preferably, the box plate of the raw material box has a closed cavity, and the raw material box is provided with an air intake hole and an air outlet hole that communicate with the closed cavity; Outlet valve.

Preferably, the output cover includes a cup body; the output port of the cup body faces downward, a cavity is arranged inside the cup body, and a plurality of ventilation holes communicated with the cavity are opened on the inner wall of the cup body, and the cup body is provided with a cavity. The top of the outer wall is provided with an air inlet communicating with the cavity and an air outlet for exhausting air.

Preferably, the purifying air drying system includes a cold air extraction unit, a hot air conveying unit, a circuit switching unit and an intelligent control unit; the cold air extraction unit, the hot air conveying unit, the circuit switching unit and the intelligent control unit are electrically connected.

Preferably, the circuit switching unit includes a two-position three-way solenoid valve and a telescopic hose, and the two-position three-way solenoid valve is electrically connected to the intelligent control unit; the two-position three-way solenoid valve is provided with input ports T1 and T2 , Output port T3; the T3 port of the two-position three-way solenoid valve is communicated with the air inlet of the cup body through a telescopic hose.

Preferably, the cold air extraction unit includes an air extraction pump, a first branch pipe, a first stop valve, a second branch pipe and a second stop valve; one end of the first branch pipe is input through the air extraction pump and the two-position three-way solenoid valve The port T1 is communicated with the other end, and the other end is communicated with the air inlet of the raw material tank; the first cut-off valve is arranged on the first branch pipe, and one end of the second branch pipe is communicated with the middle of the first branch pipe; the second cut-off valve is installed on the on the second pipe.

Preferably, the hot air conveying unit includes a booster intake pump, a booster valve, a heater and a third branch pipe; one end of the third branch pipe is connected to the output port of the heater through the booster intake pump; the third branch pipe The other end of the valve is communicated with the input port T2 of the two-position three-way solenoid valve; the booster valve is installed on the third branch pipe.

Preferably, a drying box for drying the labelled soft bottles is provided on the output side of the workbench close to the labeling mechanism; the drying box includes a drying box and a heat output pipe; the drying box The upper end of one side of the box is provided with an air inlet and an air outlet; one end of the heat output pipe is communicated with the air inlet on the drying box, and the other end is connected to the cup body through the activated carbon adsorption box installed on the workbench. The exhaust port is communicated; a cut-off valve is installed on the heat-inducing output pipe.

Preferably, the activated carbon adsorption box includes a box body and a grid-shaped activated carbon plate assembly; the grid-shaped activated carbon plate assembly is laterally installed in the box body; the grid-shaped activated carbon plate assembly includes a plurality of activated carbon plates arranged at intervals in the longitudinal direction; and each activated carbon plate The grids of the grids are interlaced with each other; openings for ventilation are provided on the side walls of the box body on both sides of the grid-shaped activated carbon plate assembly.

Preferably, the lift drive component is installed on the top of the horizontal transport device through a support frame; the lift drive component includes a lift cylinder electrically connected to the intelligent control unit and a connecting frame for driving the cup body to reciprocate up and down; the connecting frame It includes a connecting base plate and several longitudinal stabilizing columns vertically installed on both ends of the upper surface of the connecting base plate; the lifting cylinder is fixedly installed on the support frame; One end of the stabilizing column away from the connecting base plate upwardly passes through the support frame and is longitudinally slidably connected with the support frame; the bottom surface of the connecting base plate and the cup body are fixedly connected through a plurality of connecting rods.

Compared with the prior art, the beneficial effects of the present invention are as follows: first, by being provided with an air cleaning device, the air cleaning device is arranged before the labeling mechanism, and the soft to-be-labeled can be dried by drawing cold air and hot air. The bottle is air-dried, which effectively solves the problem of water droplets on the surface of the soft bottle, which causes the label to fall off easily, and improves the quality of the labeling.

1. By setting a cavity inside the box plate of the raw material box for placing the raw material label, such a setting can inject high temperature or low temperature medium into the cavity according to external needs, which has achieved the purpose of control and stability. The glue deteriorates due to changes in external temperature, which improves the quality of label pasting;

2. Set the output cover to the shape of the cup body, which can facilitate the output cover to quickly cover the soft bottle and air-dry it when it is air-drying;

It should be noted that the size of the cup body can be customized according to the size of the soft bottle of the production batch.

3. The cold air extraction unit in the purification air-drying system can quickly extract the wet and cold gas on the outer wall of the bottle, effectively reducing the accumulation of water droplets on the surface of the soft bottle and improving the quality of labeling;

4. By setting the hot air conveying unit, the booster air intake pump and booster valve in the hot air conveying unit can quickly deliver the warm air generated by the heater to the cup body at high pressure, and the control unit controls the two-digit three Turn on the solenoid valve to change the circuit on-off device to realize the smooth flow of the hot air circuit. At this time, the high-pressure hot air can blow the soft bottle in all directions, blowing off the water droplets and impurities on the outer wall of the soft bottle, so as to improve the labeling quality.

5. By setting a drying box on the output side of the workbench close to the labeling mechanism, the labels on the soft bottles after labeling can be dried, improving the coagulation efficiency of the glue and preventing the labels from falling off during subsequent packaging and handling;

In addition, for the oven to provide the heat source, the hot air used for drying the water droplets on the outer wall of the soft bottle in the previous step can be used for recovery, so as to realize the limited recovery and utilization of heat energy and save the cost.

6. By setting the activated carbon adsorption box, the activated carbon adsorption box can adsorb the water vapor in the recovered hot air, so that the airflow entering the oven is dry hot air, which improves the drying efficiency and drying effect. Moreover, the activated carbon in the activated carbon adsorption box The plate is in the shape of a grid, and the gaps between the grids will not hinder the normal transmission of air flow, and will not affect the normal progress of the drying work;

In addition, the activated carbon plate assembly in the activated carbon adsorption box is arranged as a grid-shaped activated carbon plate with several layers of grids arranged alternately at intervals, which can ensure that the water vapor is completely absorbed.

It should be noted that the specific working principle of the invention is: first, when the transport device transports the soft bottle to the working area of the purification air-drying system (infrared induction is set in this area, after the soft bottle arrives in this area, the infrared induction is an intelligent control The unit sends a signal, and the intelligent control unit controls the transportation mechanism to stop), at this time, the control unit controls the transportation device, stops running, lifts the driving part to operate, moves the cup body down to the lowest point, and covers the soft bottle to be air-dried; at this time The control unit automatically controls the cold air extraction unit to start working, and controls the two-position three-way solenoid valve to open the cold air circulation circuit and close the hot air circulation circuit. After that, the control unit controls the two-position three-way solenoid valve to close the cold air circulation circuit and open the hot air circulation circuit. At this time, the hot air conveying unit sprays the hot air to the soft bottle with rapid pressurization, and air-dries the surface of the soft bottle at high temperature. The impurities on the surface are blown off, and after the surface of the soft bottle is cleaned and air-dried, the control unit controls the transportation device again to start running, and sends the cleaned and air-dried soft bottle to the labeling area, and the control unit again controls the transportation device to stop. At this time, the soft bottle passes through automatic labeling. The mechanism performs automatic labeling work; after the labeling is completed, the control unit controls the operation of the transportation device to transport the soft bottle to the drying box, and the glue of the label is dried.

Secondly, it should be noted that the time used for labeling is the same as the time for purifying and air-drying, so the labeling and purification work is carried out synchronously, thereby improving the efficiency of labeling.

In addition, the present invention also discloses a labeling method for an automatic labeling machine for soft bottles, which is characterized in that it comprises the following steps:

S1 setting program: set the automatic command program on the input panel of the intelligent control unit in advance;

S2 raw material filling: fill the raw material label in the raw material box;

S3 material transportation: start the horizontal transportation device through the intelligent control unit, and start to transport the soft bottles to be labelled;

S4 Purification and air-drying: When the soft bottle is transported to the purification and air-drying area, infrared induction is generated in the purification and air-drying area. At this time, the intelligent control unit controls and controls the transportation device to stop, and controls the purification and air-drying device to start. Air-drying by means of hot air;

S5 automatic labeling: when the purification and air-drying reaches the time preset by the intelligent control unit, the purification and air-drying system stops working and resets. At this time, the intelligent control unit controls the horizontal transportation device to continue to operate, and transports the soft bottle to the labeling area for labeling processing;

S6 glue drying: The glue after labeling will be transported into the drying box by the horizontal transport device, and the glue will be dried.

By adopting the above-mentioned labeling method, the problem of water droplets easily appearing on the surface of the soft bottle and causing the label to fall off can be effectively solved through the previous purification and air-drying treatment method, and the labeling quality can be improved, and the subsequent drying treatment can further improve the The drying speed of the label prevents the label from falling off, which improves the quality of the labeling while improving the efficiency.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a specific embodiment of the present invention;

Fig. 2 is a schematic diagram of the structure of the execution component;

Fig. 3 is the structural representation of raw material box;

Fig. 4 is the structural representation of the output cover;

Fig. 5 is the structural representation of purification air-drying system;

6 is a schematic structural diagram of a loop switching unit;

7 is a schematic structural diagram of a cold air extraction unit;

8 is a schematic structural diagram of a hot air conveying unit;

Fig. 9 is the heating system diagram of drying box;

Figure 10 is a schematic diagram of the structure of the activated carbon adsorption box.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, but not all of 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.

Example 1

As shown in Figures 1-4, the present invention discloses an automatic labeling machine for soft bottles, comprising a workbench 1 on which a rack 2, a horizontal transport device 3 for transporting soft bottles, A raw material box 4 with an inner cavity for storing labels to be used and a labeling mechanism 5, in the specific embodiment of the present invention, the rack 2 on the input side of the labeling mechanism 5 is provided with a soft plate for removing unlabeled labels. The air-drying device 6 for purifying water vapor and water droplets on the outer wall of the bottle, the air-drying device 6 includes an air-drying machine housing 61, an executive component 62, and a cleaning and air-drying system 63 arranged inside the air-drying machine housing 61; the air-drying machine housing The body 61 is fixedly installed on the frame 2 ; the execution part 62 includes an output cover 621 and a lift drive part 622 for driving the output cover 621 to reciprocate up and down.

In the specific embodiment of the present invention, the box plate of the raw material box 4 has a closed cavity 41, and the raw material box 4 is provided with an air intake hole 42 and an air outlet hole 43 that communicate with the closed cavity 41; the air intake hole 42 and A single-phase intake valve 44 and a single-phase outlet valve 45 are respectively provided on the air outlet hole 43 .

In a specific embodiment of the present invention, the output cover 621 includes a cup body 6211; the output port of the cup body 6211 faces downward, a cavity 6212 is provided inside the cup body 6211, and an inner wall of the cup body 6211 is provided with a cavity 6212. Several ventilation holes 6213 communicate with the cavity 6212, and the top of the outer wall of the cup body 6211 is provided with an air inlet 6213 communicated with the cavity 6212 and an exhaust port 6214 for exhausting.

In the specific embodiment of the present invention, the lift driving part 622 is installed on the frame 2 on the top of the horizontal transport device 3 through the support frame 9; A connecting frame 6222 for driving the cup body 6211 to reciprocate up and down; the connecting frame 6222 includes a connecting base plate 6223 and several longitudinal stabilizing columns 6224 vertically installed on both ends of the upper surface of the connecting base plate 6223; the lifting cylinder 6221 is fixedly installed on the On the support frame 9; its gas rod output end passes downward through the support frame 9 and is fixedly connected to the upper end surface of the connecting base plate 6223; the end of the stabilization column 6224 away from the connecting base plate 6223 passes upward through the support frame 9 and slides longitudinally with the support frame 9 Connection; the bottom surface of the connection bottom plate 6223 and the cup body 6211 are fixedly connected through several connecting rods 6225 .

Compared with the prior art, the beneficial effects of the present invention are as follows: first, by being provided with an air cleaning device, the air cleaning device is arranged before the labeling mechanism, and the soft to-be-labeled can be dried by drawing cold air and hot air. The bottle is air-dried, which effectively solves the problem of water droplets on the surface of the soft bottle, which causes the label to fall off easily, and improves the quality of the labeling.

Secondly, by setting a cavity inside the box plate of the raw material box for placing the raw material label, such a setting can inject high temperature or low temperature medium into the cavity according to external needs, which has achieved the purpose of control and stability. The glue deteriorates due to changes in external temperature, which improves the quality of label pasting;

In addition, setting the output cover in the shape of a cup body can facilitate the output cover to quickly cover the soft bottle and air-dry it when it is air-dried;

It should be noted that the size of the cup body can be customized according to the size of the soft bottle of the production batch.

Embodiment 2, the difference from embodiment 1 is

As shown in FIGS. 5-7 , in the specific embodiment of the present invention, the purification air drying system 63 includes a cold air extraction unit 631, a hot air conveying unit 632, a circuit switching unit 633 and an intelligent control unit 634; the cold air extraction unit 634; 631 , the hot air conveying unit 632 , the circuit switching unit 633 and the intelligent control unit 634 are electrically connected.

In a specific embodiment of the present invention, the circuit switching unit 632 includes a two-position three-way solenoid valve 6231 and a telescopic hose 6232, and the two-position three-way solenoid valve 6231 is electrically connected to the intelligent control unit 634; the two-position three-way solenoid valve 6231 is electrically connected to the intelligent control unit 634; The solenoid valve 6231 is provided with input ports T1 and T2, and an output port T3; the T3 port of the two-position three-way solenoid valve 6231 communicates with the air inlet 6213 of the cup body 6211 through a telescopic hose 6232.

In a specific embodiment of the present invention, the cold air extraction unit 631 includes an air extraction pump 6311, a first branch pipe 6312, a first stop valve 6313, a second branch pipe 6314 and a second stop valve 6315; one end of the first branch pipe 6312 The air pump 6311 communicates with the input port T1 of the two-position three-way solenoid valve 6231, and the other end communicates with the air inlet 42 of the raw material tank 4; the first cut-off valve 6313 is arranged on the first branch pipe 6312, and the second One end of the branch pipe 6314 communicates with the middle of the first branch pipe 6312 ; the second stop valve 6315 is installed on the second branch pipe 6314 .

By adopting the above-mentioned technical solution, the cold air extraction unit in the purification air-drying system is provided, the wet and cold air on the outer wall of the bottle can be quickly extracted, effectively reducing the phenomenon of accumulation of water droplets on the surface of the soft bottle, and improving the quality of labeling;

Embodiment 3, the difference from embodiment 2 is

As shown in FIG. 8 , in the specific embodiment of the present invention, the hot air conveying unit 632 includes a booster intake pump 6321, a booster valve 6322, a heater 6323 and a third branch pipe 6324; one end of the third branch pipe 6324 passes through The booster intake pump 6321 is communicated with the output port of the heater 6323; the other end of the third branch pipe 6324 is communicated with the input port T2 of the two-position three-way solenoid valve 6231; the booster valve 6322 is installed in the third branch pipe 6324; the third branch pipe is connected with a fourth branch pipe 6325 through a tee, and the end of the fourth branch pipe away from the third branch pipe is communicated with the air outlet 43 of the raw material tank 4; the fourth branch pipe 6325 is installed with a third stop valve 6326 .

By adopting the above technical solution, by being provided with a hot air conveying unit, the pressurized air intake pump and the pressurized valve in the hot air conveying unit can quickly convey the warm air generated by the heater to the cup body at high pressure and by the control unit at this time Control the two-position three-way solenoid valve to change the circuit on-off device to realize the smooth flow of the hot air circuit. At this time, the high-pressure hot air can blow the soft bottle in all directions, blowing off the water droplets and impurities on the outer wall of the soft bottle, so as to improve the performance. Labeling quality.

Embodiment 4, the difference from embodiment 3 is

As shown in Figures 9-10, in the specific embodiment of the present invention, a drying box 7 for drying the labelled soft bottles is provided on the output side of the workbench 1 close to the labeling mechanism 5; the drying The box 7 includes a drying box 71 and a heat output pipe 72; the upper end of one side of the drying box 71 is provided with an air inlet 711 and an air outlet 712; one end of the heat output pipe 72 is connected to the drying box. The air inlet 71 on the body 71 is communicated, and the other end is communicated with the exhaust port of the cup body 6211 through the activated carbon adsorption box 8 installed on the workbench 1; a cut-off valve 73 is installed on the heat output pipe.

In the specific embodiment of the present invention, the activated carbon adsorption box 8 includes a box body 81 and a grid-shaped activated carbon plate assembly 82; the grid-shaped activated carbon plate assembly 82 is laterally installed in the box body 81; the grid-shaped activated carbon plate assembly 82 includes Several activated carbon plates 83 are arranged at intervals in the longitudinal direction; the grids of each activated carbon plate 83 are interlaced with each other; the side walls of the box 81 on both sides of the grid-shaped activated carbon plate assembly 82 are provided with openings for ventilation.

By adopting the above technical solution, a drying box is provided on the output side of the workbench close to the labeling mechanism, so that the labels on the labelled soft bottles can be dried, thereby improving the coagulation efficiency of the glue and preventing subsequent packaging and handling processes. labels fall off;

In addition, for the oven to provide the heat source, the hot air used for drying the water droplets on the outer wall of the soft bottle in the previous step can be used for recovery, so as to realize the limited recovery and utilization of heat energy and save the cost. And by setting the activated carbon adsorption box, the activated carbon adsorption box can adsorb the water vapor in the recovered hot air, so that the airflow entering the oven is dry hot air, which improves the drying efficiency and drying effect. Moreover, the activated carbon plate in the activated carbon adsorption box It is in the shape of a grid, and the gaps between the grids will not hinder the normal transmission of air flow, and will not affect the normal progress of drying work;

In addition, the activated carbon plate assembly in the activated carbon adsorption box is arranged as a grid-shaped activated carbon plate with several layers of grids arranged alternately at intervals, which can ensure that the water vapor is completely absorbed.

It should be noted that the specific working principle of the invention is as follows: first, when the transport device transports the soft bottle to the working area of the purification and air-drying system, the control unit controls the transport device, stops the operation, the lifting and driving parts operate, and the cup body is moved to the working area of the air-drying system. Move down to the lowest point and cover the soft bottle to be air-dried; at this time, the control unit automatically controls the cold air extraction unit to start working, and controls the two-position three-way solenoid valve to open the cold air circulation circuit and close the hot air circulation circuit. The extraction unit extracts the cold air from the soft bottle. After a certain period of time, the control unit controls the two-position three-way solenoid valve to close the cold air circulation circuit and open the hot air circulation circuit. At this time, the hot air conveying unit will pressurize the hot air rapidly. After the surface of the soft bottle is cleaned and air-dried, the control unit controls the transportation device to start running again, and sends the cleaned and air-dried soft bottle to the labeling At this time, the soft bottle is automatically labeled by the automatic labeling mechanism; after the labeling is completed, the control unit controls the operation of the transportation device to transport the soft bottle to the drying box, and the glue of the label is Dry treatment.

Secondly, it should be noted that the time used for labeling is the same as the time for purification and air-drying, so the labeling and purification work is carried out simultaneously to improve the efficiency of labeling.

Example 5

In addition, the present invention also discloses a labeling method for an automatic labeling machine for soft bottles, which is characterized in that it comprises the following steps:

S1 setting program: set the automatic command program on the input panel of the intelligent control unit in advance;

S2 raw material filling: fill the raw material label in the raw material box;

S3 material transportation: start the horizontal transportation device through the intelligent control unit, and start to transport the soft bottles to be labelled;

S4 Purification and air-drying: When the soft bottle is transported to the purification and air-drying area, infrared induction is generated in the purification and air-drying area. At this time, the intelligent control unit controls and controls the transportation device to stop, and controls the purification and air-drying device to start. Air-drying by means of hot air;

S5 automatic labeling: when the purification and air-drying reaches the time preset by the intelligent control unit, the purification and air-drying system stops working and resets. At this time, the intelligent control unit controls the horizontal transportation device to continue to operate, and transports the soft bottle to the labeling area for labeling processing;

S6 glue drying: The glue after labeling will be transported into the drying box by the horizontal transport device, and the glue will be dried.

By adopting the above-mentioned labeling method, the problem of water droplets easily appearing on the surface of the soft bottle and causing the label to fall off can be effectively solved through the previous purification and air-drying treatment method, and the labeling quality can be improved, and the subsequent drying treatment can further improve the The drying speed of the label prevents the label from falling off, which improves the quality of the labeling while improving the efficiency.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (11)

1. An automatic labeling machine for soft bottles, comprising a workbench on which a rack, a horizontal transport device for transporting soft bottles, a raw material box with an inner cavity for storing labels to be used and an inner cavity are installed on the workbench and a labeling mechanism, characterized in that: the rack on the input side of the labeling mechanism is provided with a purifying and air-drying device for removing water vapor and water droplets from the outer wall of the unlabeled soft bottle, and the purifying and air-drying device comprises an air-drying machine shell , an execution part, and a purification air-drying system arranged inside the air dryer shell; the air dryer shell is fixedly installed on the frame; the execution part includes an output cover and a lift drive part used to drive the output cover to reciprocate up and down . 2 . The automatic labeling machine for soft bottles according to claim 1 , wherein the box plate of the raw material box has a closed cavity, and the raw material box is provided with an air inlet and an outlet that communicate with the closed cavity. 3 . Air holes; the air inlet holes and the air outlet holes are respectively provided with a single-phase air inlet valve and a single-phase air outlet valve. 3. The automatic labeling machine for soft bottles according to claim 2, characterized in that: the output cover comprises a cup body; the output port of the cup body faces downward, and a cavity is provided inside the cup body, The inner wall of the cup body is provided with a number of ventilation holes communicating with the cavity, and the top of the outer wall of the cup is provided with an air inlet communicating with the cavity and an exhaust port for exhausting air. 4. The automatic labeling machine for soft bottles according to claim 3, characterized in that: the purifying air-drying system comprises a cold air extraction unit, a hot air conveying unit, a circuit switching unit and an intelligent control unit; The isolation unit, the hot air conveying unit, the circuit switching unit and the intelligent control unit are electrically connected. 5. The automatic labeling machine for soft bottles according to claim 4, characterized in that: the circuit switching unit comprises a two-position three-way solenoid valve and a telescopic hose, and the two-position three-way solenoid valve and intelligent control The unit is electrically connected; the two-position three-way solenoid valve is provided with input ports T1 and T2, and an output port T3; the T3 port of the two-position three-way solenoid valve is communicated with the air inlet of the cup body through a telescopic hose. 6. The automatic labeling machine for soft bottles according to claim 5, wherein the cold air extraction unit comprises an air pump, a first branch pipe, a first stop valve, a second branch pipe and a second stop valve; One end of the first branch pipe is communicated with the input port T1 of the two-position three-way solenoid valve through an air pump, and the other end is communicated with the air inlet of the raw material tank; the first stop valve is arranged on the first branch pipe, and the One end of the two branch pipes is communicated with the middle of the first branch pipe; the second stop valve is installed on the second branch pipe. 7. The automatic labeling machine for soft bottles according to claim 5 or 6, wherein the hot air conveying unit comprises a pressurized air intake pump, a pressurized valve, a heater and a third branch pipe; the third branch pipe The other end of the third branch pipe is connected with the input port T2 of the two-position three-way solenoid valve; the booster valve is installed on the third branch pipe. 8. The automatic labeling machine for soft bottles according to claim 7, wherein the output side of the workbench close to the labeling mechanism is provided with a drying box for drying the finished soft bottles; The drying box includes a drying box and a heat output pipe; the upper end of one side of the drying box is provided with an air inlet and an air outlet; one end of the heat output pipe is connected to the drying box The air inlet is communicated, and the other end is communicated with the exhaust port of the cup body through the activated carbon adsorption box installed on the workbench; a stop valve is installed on the heat output pipe. 9. The automatic labeling machine for soft bottles according to claim 8, characterized in that: the activated carbon adsorption box comprises a box body and a grid-shaped activated carbon plate assembly; the grid-shaped activated carbon plate assembly is laterally installed in the box body; The grid-shaped activated carbon plate assembly includes a plurality of activated carbon plates arranged at intervals in the longitudinal direction; the grids of each activated carbon plate are interlaced with each other; the side walls of the box body on both sides of the grid-shaped activated carbon plate assembly are provided with openings for ventilation. 10. An automatic labeling machine for soft bottles according to claim 6, 7 or 8, characterized in that: the lift drive part is installed on the top of the horizontal transport device through a support frame; the lift drive part includes an intelligent A lifting cylinder electrically connected to the control unit and a connecting frame for driving the cup body to reciprocate up and down; the connecting frame includes a connecting base plate and several longitudinal stabilizing columns vertically installed on both ends of the upper surface of the connecting base plate; the lifting cylinder is fixedly installed On the support frame; its gas rod output end passes downward through the support frame and is fixedly connected to the upper end face of the connecting base plate; the end of the stabilizing column far from the connecting base plate passes upward through the support frame and is longitudinally slidably connected with the support frame; The bottom surface and the cup body are fixedly connected through several connecting rods. 11. A labeling method for an automatic labeling machine for soft bottles, characterized in that: comprising the steps: S1 setting program: set the automatic command program on the input panel of the intelligent control unit in advance; S2 raw material filling: fill the raw material label in the raw material box; S3 material transportation: start the horizontal transportation device through the intelligent control unit, and start to transport the soft bottles to be labelled; S4 Purification and air-drying: When the soft bottle is transported to the purification and air-drying area, infrared induction is generated in the purification and air-drying area. At this time, the intelligent control unit controls and controls the transportation device to stop, and controls the purification and air-drying device to start. Air-drying by means of hot air; S5 automatic labeling: when the purification and air-drying reaches the time preset by the intelligent control unit, the purification and air-drying system stops working and resets. At this time, the intelligent control unit controls the horizontal transportation device to continue to operate, and transports the soft bottle to the labeling area for labeling processing; S6 glue drying: The glue after labeling will be transported into the drying box by the horizontal transport device, and the glue will be dried.

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