A method for vacuumizing a rubber bag of a bale press unit

Abstract

The application provides a kind of vacuumizing method of glue bag of cigarette making machine group, relating to cigarette preparation technical field, comprising the following steps: S1: when vacuumizing, opening controller, first vacuum gauge and second vacuum gauge;S2: controller controls air pump to extract air in glue bucket into glue bag;S3: whether the vacuum state in glue bucket is judged;If yes, execute S4;Otherwise, air is filled into glue bucket, and return to S2;S4: controller controls air pump to extract air in glue bag into glue bucket;S5: whether the vacuum state in glue bag is judged;If yes, vacuumizing is completed;Otherwise, air is filled into glue bag, and return to S2.The application utilizes the property that the space in glue bucket is invariable, carries out air suction on the outside of glue bag and the inside of glue bag, ensures that glue bag can be completely vacuumized, facilitates injecting glue, and the quality of injected glue can effectively reach the required quality, the effect of glue is guaranteed, and the use stability of cigarette making machine group is better.

Description

Technical Field

[0001] This invention relates to the field of cigarette manufacturing technology, and in particular, to a method for vacuuming plastic bags in a cigarette rolling machine. Background Technology

[0002] The cigarette rolling and packaging machine is a machine that rolls tobacco into cigarettes using cigarette paper. It is the main cigarette rolling machinery and consists of three parts: the feeding and forming machine (VE), the rolling and forming machine (SE), and the filter tip attaching machine (MAX). Multiple cigarette rolling and packaging machines are installed in the entire cigarette factory area, and each machine contains multiple machines. Each machine is equipped with an external glue tank, and each external glue tank has a glue filling port. When the glue inside the glue tank is used up, glue needs to be refilled into the glue tank.

[0003] To prevent residual glue in the glue bucket from contaminating newly added different glues, a glue bag is usually placed inside each outer glue bucket to hold the glue. After the glue is used up, if the same glue is added, it can be directly refilled into the glue bag; if a different glue is added, the glue bag must be discarded, and a new glue bag must be added to the glue bucket for refilling. For example, Chinese invention patent CN114655493A discloses a self-cleaning glue supply device for cigarette equipment, consisting of a glue bucket, a sealing top cover, and a glue storage bag inside the glue bucket. The invention incorporates a lightweight floating platform. Specifically, glue is injected into the storage bag through the inlet, and the upper part of the glue tank is vented through the exhaust port, allowing the storage bag to expand. This isolates the glue from the tank, fundamentally solving the cleaning problems caused by glue sticking to the tank walls and forming a glue layer on the surface. The lightweight floating platform, under the gas pressure provided by the inlet, assists in squeezing the glue from the storage bag through the outlet pipe, quickly replenishing the glue in the subsequent glue tank, improving glue supply efficiency, and shortening waiting time. Furthermore, after production, the lightweight floating platform can be used to compress downwards, ensuring that the glue in the storage bag is fully squeezed out, minimizing residue and waste. This invention not only meets the requirement of no cleaning but also improves the overall operating efficiency of the equipment.

[0004] However, the above-mentioned glue supply and replenishment device still has the following drawbacks: the weight of the glue in the plastic bag is fixed. When injecting glue into the plastic bag, air will always enter the bag. When injecting glue into the bag at this time, not only will the quality of the injected glue not meet the requirements, but the controller will also misjudge the quality of the glue in the plastic bag, which will cause deviations and abnormal shutdowns when the wrapping machine is used. Moreover, air will easily cause the glue to oxidize and deteriorate, resulting in poor glue performance.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient vacuuming method for plastic bags in a rolling and packaging unit. Summary of the Invention

[0006] The purpose of this invention is to provide a vacuuming method for plastic bags in a roll-up packaging unit. By utilizing the property that the space inside the plastic bucket remains unchanged, air is drawn from both the outside and inside of the plastic bag to ensure that the plastic bag can be completely vacuumed. This facilitates the injection of glue, and the quality of the injected glue can effectively meet the required quality. The glue effect is guaranteed, and the roll-up packaging unit has better stability in use.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A method for vacuuming plastic bags in a packaging machine is provided, applicable to the vacuuming structure of the packaging machine. The structure includes a controller, a plastic drum, and plastic bags disposed inside the plastic drum. The plastic drum is connected to a first three-way valve via a first pipe, and the plastic bags are connected to a second three-way valve via a second pipe. A first vacuum gauge is connected to the first three-way valve, and a second vacuum gauge is connected to the second three-way valve. The first three-way valve is connected to the second three-way valve via a vacuum pump. The first vacuum gauge, the second vacuum gauge, and the vacuum pump are all electrically connected to the controller.

[0009] The method includes the following steps:

[0010] S1: Upon receiving a vacuuming command, activate the controller, the first vacuum gauge, and the second vacuum gauge.

[0011] S2: The controller controls the air pump to draw air from the glue bucket into the glue bag;

[0012] S3: Determine whether the glue container is in a vacuum state by reading the first vacuum gauge; if so, proceed to step S4; otherwise, the controller controls the air pump to fill the glue container with air and returns to step S2.

[0013] S4: The controller controls the air pump to draw air from the plastic bag into the plastic bucket;

[0014] S5: Determine whether the bag is in a vacuum state by reading the second vacuum gauge; if so, the vacuuming is complete; otherwise, the controller controls the air pump to fill the bag with air and returns to step S2.

[0015] As a preferred embodiment of the present invention, when performing step S3, after a first predetermined time, the reading of the first vacuum gauge is used to determine whether the glue container is in a vacuum state; if so, step S4 is performed; otherwise, the controller controls the air pump to fill the glue container with air and returns to step S2.

[0016] When executing step S5, after the second predetermined time, the reading of the second vacuum gauge is used to determine whether the bag is in a vacuum state; if so, the vacuuming is completed; otherwise, the controller controls the air pump to fill the bag with air and returns to step S2.

[0017] As a preferred embodiment of the present invention, the air pump is connected to an air supply pipe;

[0018] When performing step S3, the first vacuum gauge reading shows that the glue container is not in a vacuum state. The gas supply pipe is opened, and the controller controls the vacuum pump to repeatedly fill and evacuate the glue container through the gas supply pipe at least three times.

[0019] When performing step S5, if the second vacuum gauge reading indicates that the bag is not in a vacuum state, the gas supply pipe is opened, and the controller controls the vacuum pump to repeatedly fill and evacuate the bag at least three times through the gas supply pipe.

[0020] As a preferred embodiment of the present invention, when the reading of the first vacuum gauge indicates that the inside of the glue bucket is in a vacuum state during step S3, the gas supply pipe is sealed and step S4 is executed.

[0021] As a preferred embodiment of the present invention, before performing step S1, it is ensured that the glue inside the plastic bag has been emptied.

[0022] As a preferred embodiment of the present invention, a rotating shaft is connected to the outer side of the glue bucket;

[0023] Before performing step S2, drive the rotating shaft so that the second tube is located at the bottom of the plastic bag;

[0024] Before performing step S4, drive the rotating shaft so that the second tube is positioned at the top of the plastic bag.

[0025] As a preferred embodiment of the present invention, the first tube, the second tube, the first tee, and the second tee are all flexible components;

[0026] Furthermore, the first and second pipes have the same specifications, and the first tee and the second tee have the same specifications.

[0027] The beneficial effects of the vacuuming method for plastic bags in the packaging machine of the present invention are as follows: by utilizing the property that the space inside the plastic barrel remains unchanged, the plastic bag is connected to the plastic barrel through an air pump, and air is drawn from both the outside and inside of the plastic bag to ensure that the plastic bag can be completely vacuumed, which facilitates the injection of glue and ensures that the quality of the injected glue can effectively meet the requirements. The glue effect is guaranteed, and the packaging machine has better stability in use. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the preparation process of an embodiment of a vacuuming method for plastic bags using a packaging machine according to the present invention;

[0030] Figure 2 This is a schematic diagram of the vacuuming structure of the plastic bag forming unit in the plastic bag vacuuming method of the forming unit of the present invention;

[0031] The components are: 1. Glue bucket; 11. First tube; 2. Glue bag; 21. Second tube; 31. First tee; 32. Second tee; 33. First vacuum gauge; 34. Second vacuum gauge; 35. Vacuum pump; 4. Rotating shaft. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0033] In the following description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The following description provides multiple embodiments of this application, which can be substituted or combined with each other. Therefore, this application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then this application should also be considered to include embodiments containing one or more other possible combinations of A, B, C, and D, even if such embodiments are not explicitly described in the following text.

[0034] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the described elements without departing from the scope of this application. Various processes or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

[0035] Example 1: Please refer to Figure 1This is only one embodiment of the present invention. The present invention provides a method for vacuuming plastic bags in a packaging machine, applicable to the vacuuming structure of plastic bags in a packaging machine. The structure includes a controller, a plastic bucket, and plastic bags disposed in the plastic bucket. The plastic bucket is connected to a first three-way valve via a first pipe, and the plastic bags are connected to a second three-way valve via a second pipe. The first three-way valve is connected to a first vacuum gauge, and the second three-way valve is connected to a second vacuum gauge. The first three-way valve is connected to the second three-way valve via a vacuum pump. The first vacuum gauge, the second vacuum gauge, and the vacuum pump are all electrically connected to the controller.

[0036] In this invention, the main components of the entire vacuum structure are a glue container, a glue bag placed inside the glue container, and a vacuum pump for evacuating the glue bag to a vacuum. The glue container is a sealed structure, or a structure that can be closed to a seal. In addition to the glue filling port, the glue bag is also provided with an air extraction port. The air extraction port is connected to a second three-way valve through a second pipe. The second three-way valve has three channels: the first channel is connected to the second pipe, the second channel is connected to the second vacuum gauge, and the third channel is connected to the vacuum pump. At the same time, the glue container also has a functional port, which is connected to a first three-way valve through a first pipe. The first three-way valve has three channels: the first channel is connected to the first pipe, the second channel is connected to the first vacuum gauge, and the third channel is connected to the vacuum pump.

[0037] In this way, the plastic bag is completely sealed except for the glue injection port and the air extraction port; the plastic bucket is completely sealed except for the glue injection hole and the functional port for easy glue injection. Of course, the glue injection hole is also sealed at the glue injection port; the end of the first tee near the first vacuum gauge is sealed; the end of the second tee near the second vacuum gauge is sealed; the plastic bag is connected to the plastic bucket in sequence through the air extraction port, the second pipe, the second tee, the air pump, the first tee, the first pipe, and the functional port, forming a sealed connection structure. The air pump can draw air from the plastic bag into the plastic bucket, or it can draw air from the plastic bucket into the plastic bag.

[0038] It should be noted that when it is necessary to inject glue into the plastic bag, simply connect the glue storage chamber to the glue injection port through the glue injection pipe. At this time, temporarily close the glue injection pipe, draw a vacuum into the plastic bag, and then open the glue injection pipe to inject glue into the plastic bag. There is no air pollution inside the plastic bag, and the plastic bag can be filled with glue to reach the predetermined weight.

[0039] The specific vacuuming method for drawing a vacuum inside the plastic bag includes the following steps:

[0040] S1: Upon receiving a vacuuming command, activate the controller, the first vacuum gauge, and the second vacuum gauge.

[0041] As described above regarding the vacuuming structure, when the glue storage chamber is connected to the glue injection port through the glue injection pipe and the glue injection pipe is closed, it is necessary to vacuum the glue bag, issue a vacuuming command, and activate the controller, the first vacuum gauge, and the second vacuum gauge.

[0042] After the controller is turned on, it needs to perform a self-check to ensure that the first vacuum gauge, the second vacuum gauge, and the vacuum pump are all properly connected to the controller before the formal vacuuming operation can begin.

[0043] S2: The controller controls the air pump to draw air from the glue bucket into the glue bag;

[0044] When the vacuuming process officially begins, the controller controls the air pump to draw the air from the glue bucket into the glue bag. In effect, this means drawing the air between the glue bag and the glue bucket into the glue bag. Since the size of the glue bucket remains constant, the total volume of the air between the glue bag and the glue bucket, along with the air inside the glue bag, is exactly equal to the total volume of the glue bucket. Once all the air between the glue bag and the glue bucket has been drawn into the glue bag, the glue bag expands and deforms until it completely fills the glue bucket. The area between the glue bag and the glue bucket (hereinafter referred to as inside the glue bucket) is then evacuated to a vacuum.

[0045] Here, since the thickness of the plastic bag itself occupies a very small volume, and the volume inside the first and second three-way connectors is also small, its impact on the total volume and the total air volume can be ignored.

[0046] S3: Determine whether the glue container is in a vacuum state by reading the first vacuum gauge; if so, proceed to step S4; otherwise, the controller controls the air pump to fill the glue container with air and returns to step S2.

[0047] In this case, when executing step S3, after the first predetermined time, the reading of the first vacuum gauge is used to determine whether the glue container is in a vacuum state; if so, step S4 is executed; otherwise, the controller controls the air pump to fill the glue container with air and returns to step S2.

[0048] Because it takes a certain amount of time to evacuate the air from the glue bucket into the glue bag, and there must be no malfunction during this time, a buffer period of 15 seconds is generally required.

[0049] Air is drawn from between the plastic bag and the plastic container into the plastic bag. After a period of time, when all the air between the plastic bag and the plastic container has been drawn into the plastic bag, the plastic bag expands and deforms until it completely fills the plastic container, and the plastic container is evacuated to a vacuum. The vacuum status inside the plastic container can be read by a first vacuum gauge connected to the plastic container. If the reading of the first vacuum gauge is 0 or -1, it indicates that the plastic container has been evacuated to a vacuum. Otherwise, it means that the plastic container is still not in a vacuum state. It may be that the plastic bag cannot expand to fill the plastic container, or the direction of the expansion deformation of the plastic bag may block the function port. It may also be that the air pump or the plastic container is not sealed properly, causing air leakage. At this time, it is necessary to ensure that all pipes, plastic containers and plastic bags are sealed properly, and to repeat the air pumping several times. That is, to draw the air out of the plastic bag and fill the plastic container appropriately, and then perform the air pumping preparation in step S2 again.

[0050] This process continues until the inside of the plastic bucket is completely evacuated before proceeding to step S4, which involves evacuating the plastic bag.

[0051] S4: The controller controls the air pump to draw air from the plastic bag into the plastic bucket;

[0052] When the inside of the glue bucket is completely evacuated to a vacuum, and the glue bag expands and occupies the entire space inside the glue bucket, the controller controls the air pump to draw the air from the glue bag into the glue bucket. Under the premise that the glue bag, glue bucket, and all pipes are sealed, once all the air inside the glue bag is extracted, the air inside the glue bucket outside the glue bag is just filled, and the glue bag forms a complete vacuum under external pressure.

[0053] S5: Determine whether the bag is in a vacuum state by reading the second vacuum gauge; if so, the vacuuming is complete; otherwise, the controller controls the air pump to fill the bag with air and returns to step S2.

[0054] In this case, when executing step S5, after the second predetermined time, the reading of the second vacuum gauge is used to determine whether the bag is in a vacuum state; if so, the vacuuming is completed; otherwise, the controller controls the air pump to inflate the bag and returns to step S2.

[0055] Similarly, since it takes a certain amount of time to pump the air out of the plastic bag into the plastic bucket, and there must be no pumping failure during this time, a second predetermined time, usually 12 seconds, is needed for buffering. The second predetermined time is shorter than the first predetermined time because there is no need to consider whether the expansion of the plastic bag will occupy the entire plastic bucket, so that the pumping speed in step S4 is higher than the pumping speed in step S2.

[0056] The air inside the plastic bag is evacuated into the plastic container. After a period of time, when all the air in the plastic bag has been evacuated into the plastic container, the plastic bag will fully shrink and close tightly, and a vacuum will be created inside the plastic bag. The vacuum status inside the plastic bag can be read using a second vacuum gauge connected to the inside of the plastic bag. If the reading of the second vacuum gauge is 0 or -1, it indicates that a vacuum has been created inside the plastic bag. Otherwise, it means that the plastic bag is not yet in a vacuum state. This may be because the plastic bag cannot shrink completely, or the end of the plastic bag near the air extraction port is sealed in advance, preventing air from being extracted from the end away from the air extraction port. It may also be due to a leak in the air pump or the plastic container. In this case, it is necessary to ensure that all pipes, the plastic container, and the plastic bag are completely sealed, and to repeat the air extraction process several times. This involves evacuating the air from the plastic container and appropriately inflating the plastic bag, and then repeating the air extraction preparation step S4.

[0057] The vacuuming process is complete once the plastic bag is completely evacuated. At this point, the glue injection pipe can be opened to inject glue into the plastic bag. There is no air pollution inside the plastic bag, and the bag can be filled with glue to reach the predetermined weight.

[0058] Example 2: See also Figure 1 This is only one embodiment of the present invention. Based on Embodiment 1, in the vacuuming method for plastic bags of a rolling and packaging machine of the present invention, the vacuum pump is connected to a gas supply pipe.

[0059] When performing step S3, the first vacuum gauge reading shows that the glue container is not in a vacuum state. The gas supply pipe is opened, and the controller controls the vacuum pump to repeatedly fill and evacuate the glue container through the gas supply pipe at least three times.

[0060] When performing step S5, if the second vacuum gauge reading indicates that the bag is not in a vacuum state, the gas supply pipe is opened, and the controller controls the vacuum pump to repeatedly fill and evacuate the bag at least three times through the gas supply pipe.

[0061] To be precise, if any pipes, glue buckets, or glue bags are damaged during steps S3 and S5, the seals are repaired first. Then, the controller controls the air pump to replenish air into the glue bags and glue buckets through the air supply pipe to ensure that the air pressure inside the glue bags and glue buckets is stable to atmospheric pressure. The first and second vacuum gauges are used to check the pressure. Then, the gas exchange between the glue bags and glue buckets is repeated at least three times. Finally, the air is pumped out and the vacuum is drawn.

[0062] Of course, when performing step S3, if the reading of the first vacuum gauge indicates that the inside of the glue bucket is in a vacuum state, the gas supply pipe is sealed and step S4 is performed.

[0063] Furthermore, before performing step S1, ensure that the glue inside the plastic bag has been drained.

[0064] In this invention, a rotating shaft is connected to the outside of the glue bucket;

[0065] Before performing step S2, drive the rotating shaft so that the second tube is located at the bottom of the plastic bag; this facilitates the expansion of the plastic bag until it fills the entire plastic bucket.

[0066] Before performing step S4, drive the rotating shaft so that the second tube is located at the top of the plastic bag; this facilitates the air in the plastic bucket to squeeze the plastic bag, making it easier to extract all the air from the plastic bag.

[0067] Finally, to further reduce the impact of each pipe on the entire vacuuming operation, the first pipe, the second pipe, the first tee, and the second tee are all flexible components. Under the suction of the vacuum pump, the side of the pipe that becomes a vacuum will collapse and contract appropriately to prevent air from accumulating. Of course, the first pipe and the second pipe have the same specifications, the first tee and the second tee have the same specifications, and the pipes at both ends of the vacuum pump have the same volume and the same volume of air they can hold, so as to ensure that the air can completely reach the other end of the vacuum pump during vacuuming.

[0068] This invention discloses a vacuuming method for plastic bags in a roll-packing machine. Utilizing the property that the space inside the plastic drum remains constant, the plastic bag is connected to the plastic drum via an air pump. Air is drawn from both the outside and inside of the plastic bag to ensure that it can be completely vacuumed. This facilitates the injection of adhesive, and the quality of the injected adhesive can effectively meet the required standards. The adhesive effect is guaranteed, and the roll-packing machine exhibits better stability in use.

[0069] The foregoing description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method for vacuuming plastic bags in a packaging machine, applicable to a plastic bag vacuuming structure in a packaging machine, the structure including a controller, a plastic bucket, and plastic bags disposed in the plastic bucket, the plastic bucket being connected to a first three-way valve via a first pipe, the plastic bags being connected to a second three-way valve via a second pipe, the first three-way valve being connected to a first vacuum gauge, the second three-way valve being connected to a second vacuum gauge, the first three-way valve being connected to the second three-way valve via a vacuum pump; the first vacuum gauge, the second vacuum gauge, and the vacuum pump are all electrically connected to the controller; Its features are, The method includes the following steps: S1: Upon receiving a vacuuming command, activate the controller, the first vacuum gauge, and the second vacuum gauge. S2: The controller controls the air pump to draw air from the glue bucket into the glue bag; S3: Determine whether the glue container is in a vacuum state by reading the first vacuum gauge; if so, proceed to step S4; otherwise, the controller controls the air pump to fill the glue container with air and returns to step S2. S4: The controller controls the air pump to draw air from the plastic bag into the plastic bucket; S5: Determine whether the bag is in a vacuum state by reading the second vacuum gauge; if so, the vacuuming is complete; otherwise, the controller controls the air pump to fill the bag with air and returns to step S2.

2. The method for vacuuming plastic bags using a roll-packing machine according to claim 1, characterized in that: When executing step S3, after a first predetermined time, the reading of the first vacuum gauge is used to determine whether the glue container is in a vacuum state; if so, step S4 is executed; otherwise, the controller controls the air pump to fill the glue container with air and returns to step S2. When executing step S5, after the second predetermined time, the reading of the second vacuum gauge is used to determine whether the bag is in a vacuum state; if so, the vacuuming is completed; otherwise, the controller controls the air pump to fill the bag with air and returns to step S2.

3. The method for vacuuming plastic bags using a roll-packing machine according to claim 1, characterized in that: The air pump is connected to an air supply pipe; When performing step S3, the first vacuum gauge reading shows that the glue container is not in a vacuum state. The gas supply pipe is opened, and the controller controls the vacuum pump to repeatedly fill and evacuate the glue container through the gas supply pipe at least three times. When performing step S5, if the second vacuum gauge reading indicates that the bag is not in a vacuum state, the gas supply pipe is opened, and the controller controls the vacuum pump to repeatedly fill and evacuate the bag at least three times through the gas supply pipe.

4. The method for vacuuming plastic bags using a roll-packing machine according to claim 3, characterized in that: When performing step S3, if the reading of the first vacuum gauge indicates that the inside of the glue bucket is in a vacuum state, the gas supply pipe is sealed, and step S4 is performed.

5. The method for vacuuming plastic bags using a roll-packing machine according to claim 1, characterized in that: Before performing step S1, ensure that the glue in the plastic bag has been drained.

6. The method for vacuuming plastic bags using a roll-packing machine according to claim 1, characterized in that: A rotating shaft is connected to the outside of the glue bucket; Before performing step S2, drive the rotating shaft so that the second tube is located at the bottom of the plastic bag; Before performing step S4, drive the rotating shaft so that the second tube is positioned at the top of the plastic bag.

7. The method for vacuuming plastic bags using a packaging machine according to claim 1, characterized in that: The first tube, the second tube, the first tee, and the second tee are all flexible components; Furthermore, the first and second pipes have the same specifications, and the first tee and the second tee have the same specifications.

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