Three-row synchronous automatic production line for wet tissues

Abstract

The invention provides a wet tissue three-row synchronous automatic production line, and belongs to the technical field of wet tissue production. The raw material feeding device is mounted on the equipment frame, and the raw material feeding device is used for feeding and supplementing non-woven fabrics; the advancing direction of the non-woven fabric is defined as the right side; the traction device is used for pulling the non-woven fabric to advance; the slitting device is used for slitting the non-woven fabric into a plurality of non-woven fabric strips, and the slitting device is arranged on the right side of the raw material feeding device; the buffer device is improved, whether the three rows of non-woven fabrics are synchronous or not is judged according to pressure changes, the advancing speed of the non-woven fabrics is adjusted in time through the buffer device, and synchronous operation of the three rows of non-woven fabrics is achieved; the cost of the device is lower, three motors do not need to be arranged to control and adjust the three rows of non-woven fabrics respectively, and the practicability is better; by improving the cloth receiving mechanism and the sealing device, reinforcing the motor and the roll shaft and the like, the running speed of the equipment is increased, and the production efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wet wipe production, and particularly to a three-row synchronous automatic production line for wet wipes. Background Art

[0002] In the field of personal care and hygiene products, the market demand for wet wipes shows a continuous growth trend. From daily cleaning to hygiene maintenance in special scenarios, wet wipes are widely used in many industries such as household, medical, catering, and tourism due to their convenience and practicality. To meet the growing market demand for wet wipes and improve production efficiency, the research and innovation of wet wipe automatic production lines are crucial.

[0003] With the increasing market demand for wet wipes, how to improve production capacity is an urgent problem to be solved at present. At present, the production of wet wipes has transitioned from traditional semi-automatic production to fully automatic production. To improve production capacity, it mainly starts from two aspects. One is to expand the production line, and the other is to improve the production efficiency of the production line.

[0004] Expanding the production line is the most direct way to increase production capacity. However, expanding the production line means that new equipment needs to be purchased, the factory building needs to be expanded, etc., and the investment is too large, making it difficult for many enterprises to afford. The increase in costs is also likely to affect the pricing of products, which is not conducive to the development of enterprises.

[0005] Therefore, the best solution is to improve the production efficiency of the production line. In this way, the production capacity can be increased without or with little expansion of the enterprise.

[0006] The invention patent with the application number 2021112365105 discloses a wet wipe automatic production line. This patent is for our company's previous generation of products. This solution can run synchronously in two lines, producing two packs of wet wipes at a time, thus improving production efficiency. In addition, during the process of conveying wet wipe raw materials, the wet wipe raw materials can first enter the cutting system to form single-piece wet wipes, and then pass through the humidifying system. When conveying the single-piece wet wipes, it can avoid pulling the humidified wet wipe raw materials, thereby avoiding the situation of pulling and breaking of the humidified wet wipe raw materials.

[0007] In order to further increase the output of wet wipes, our company subsequently started the research and development of a three-row synchronous automatic production line. However, after changing the double-row production line to a three-row production line, many problems have emerged. After the wet wipe production line becomes three rows, the synchronization problem becomes a major problem. For the three rows of non-woven fabrics, once there is a slight speed deviation in one of them, with the high-speed operation of the equipment, a large number of deviations will occur in the three rows of non-woven fabrics in a very short time. In addition, during the cloth receiving process, due to the non-synchronization of the three non-woven fabrics, problems occur in cloth receiving and it needs to be shut down for processing, affecting normal production. Therefore, how to ensure the stable operation of the three-row synchronous automatic production line is the key problem to be solved at present. Summary of the Invention

[0008] The present invention provides a wet wipe three-row synchronous automated production line to solve the technical problem of asynchronous movement of three rows of non-woven fabrics in the prior art.

[0009] To solve the above problems, the wet wipe three-row synchronous automated production line provided by the present invention adopts the following technical solutions: including an equipment rack;

[0010] A raw material feeding device, which is installed on the equipment rack and is used for feeding and replenishing non-woven fabrics; the advancing direction of the non-woven fabric is defined as the right side;

[0011] A traction device, which is used for traction the non-woven fabric to advance;

[0012] A slitting device, which is used for slitting the non-woven fabric into several non-woven strips, and the slitting device is arranged on the right side of the raw material feeding device;

[0013] A buffer device, which is used for buffering to facilitate cloth changing, and the buffer device is arranged on the right side of the slitting device;

[0014] A deviation rectifying and folding device, which is used for deviation rectifying and folding the non-woven fabric, and the deviation rectifying and folding device is arranged on the right side of the slitting device;

[0015] A liquid adding device, which is used for adding liquid to the non-woven fabric. The liquid adding device includes a liquid adding mechanism and a liquid supply mechanism, and the liquid adding mechanism is arranged on the right side of the deviation rectifying and folding device;

[0016] A cutting device, which is used for cutting the non-woven fabric, and the cutting device is arranged on the right side of the liquid adding mechanism;

[0017] A bagging device, which is used for pushing the cut non-woven fabric into a packaging bag, and the bagging device is arranged on the right side of the cutting device;

[0018] A sealing device, which is used for sealing the packaging bag to complete the processing of wet wipes, and the sealing device is arranged on the right side of the bagging device;

[0019] The slitting device includes two cutting knives, which slit the non-woven fabric into three non-woven strips;

[0020] The buffer device includes a plurality of fixed rollers and a plurality of adjusting rollers, the fixed rollers and the adjusting rollers are arranged alternately in the up-down direction, a lifting cylinder for driving the adjusting rollers to lift is arranged below the adjusting rollers, and a pressure sensor for detecting the pressure change of the adjusting rollers is also arranged between the lifting cylinder and the adjusting rollers.

[0021] By adopting the above technical solution, it is ensured that the three rows of non-woven fabrics remain synchronized during operation. The buffer device is provided with a pressure sensor. When the speed of one of the non-woven fabrics changes and causes out-of-sync, it will be reflected in the force. For example, when the speed of one of the non-woven fabrics changes, the degree of adhesion between the non-woven fabric and the roller shaft will also change. When the external control system detects a change in the pressure of the pressure sensor, the lifting cylinder is driven to descend slightly. According to the friction formula F = μN (where F is the frictional force, μ is the coefficient of friction, and N is the normal pressure), the tension makes the normal pressure of the non-woven fabric on the fixed roller and the adjusting roller increase, so that the frictional force increases, hindering the progress of the non-woven fabric and reducing the speed. As the lifting cylinder continues to drive the adjusting roller to tighten the other non-woven fabrics, the degree of adhesion of the three non-woven fabrics to the adjusting roller gradually becomes consistent, and then the three rows are kept synchronized. After the three rows of non-woven fabrics are synchronized, the buffer device slowly resets.

[0022] It should be noted that the above adjustment is mainly fine-tuning. At the beginning of the speed deviation of the three non-woven fabrics, the above fine-tuning method can be used to make the traveling speeds of the three non-woven fabrics consistent, avoiding further increase in the differential speed, thereby greatly improving the stability of the equipment operation. (Since the equipment runs at high speed, if the deviation is too large and the synchronization cannot be adjusted in time, the machine should be stopped in time to avoid the rapid increase in the differential speed of the three non-woven fabrics in a short time).

[0023] As a further improvement, the raw material feeding device includes two feeding rollers for supporting the non-woven fabric, and a cloth receiving device for connecting the non-woven fabric is arranged above the two feeding rollers.

[0024] By adopting the above technical solution, it is ensured that the non-woven fabric is stably supplied.

[0025] As a further improvement, a vertically arranged guide rail is provided below the fixed roller, and a mounting plate is slidably assembled on the guide rail, and the adjusting rollers are evenly distributed on the mounting plate in the horizontal direction.

[0026] By adopting the above technical solution, the sliding accuracy of the adjusting roller can be improved. The guide rail and the mounting plate cooperate to enable the adjusting roller to slide precisely in the vertical direction during the lifting process, ensuring accurate control of the displacement of the adjusting roller.

[0027] As a further improvement, the liquid adding mechanism includes a spray head for spraying liquid medicine on the non-woven fabric and a dipping tank for storing liquid medicine to soak and add liquid medicine to the non-woven fabric, so that users can choose the way of adding liquid medicine according to their needs.

[0028] By adopting the above technical solution, there are two liquid adding methods at the same time, which is convenient for the manufacturer to choose different liquid adding methods according to different needs.

[0029] Compared with direct immersion, spraying is to spray the liquid medicine quantitatively as needed, which can accurately control the usage amount of the liquid medicine, avoid the waste of a large amount of liquid medicine. Especially for some expensive liquid medicines, this method can reduce the production cost. In addition, during the spraying process, the liquid medicine has less contact with the external environment, and the wet wipes do not need to share a dipping tank, reducing the possibility of the liquid medicine being contaminated. However, the accuracy control of spraying the medicine is relatively more difficult and requires multiple debugging, which is not as convenient and direct as immersion.

[0030] The advantage of immersion is that the liquid medicine penetrates sufficiently. The wet wipes are completely immersed in the liquid medicine, which can ensure that the liquid medicine fully penetrates into every part of the wet wipes. Whether it is the surface or the inside, the wet wipes can evenly absorb the liquid medicine, and the operation is simple, which is suitable for small-scale production. However, correspondingly, the disadvantage of immersion is that relatively more liquid medicine is wasted, and the liquid medicine in the dipping tank is in contact with the external environment for a long time, which is easily contaminated by dust, microorganisms, etc. in the air, affecting the quality and stability of the liquid medicine.

[0031] As a further improvement, the cutting device includes a cutting roller knife assembly for cutting the non-woven fabric into small pieces. A cloth receiving mechanism for receiving and transferring the non-woven fabric is arranged below the cutting roller knife assembly, and a feeding mechanism for conveying the non-woven fabric is further arranged at the lower right of the cloth receiving mechanism.

[0032] By adopting the above technical solution, the cutting, stacking, blanking and transportation of the non-woven fabric can be realized.

[0033] As a further improvement, the cloth receiving mechanism includes an upper cloth receiving mechanism and a lower cloth receiving mechanism cooperating with the upper cloth receiving mechanism. The lower cloth receiving mechanism includes a lower material receiving component that can move up and down in the vertical direction. The lower material receiving component has a plurality of receiving plates arranged at intervals, and an avoidance gap is formed between the receiving plates.

[0034] The feeding mechanism includes a belt conveying mechanism, a embossing mechanism and a compensation conveying mechanism. The belt conveying mechanism has a plurality of conveying belts arranged at intervals. The receiving plates are located in the gaps between the conveying belts, so that the lower material receiving component can pass through the belt conveying mechanism in the vertical direction, and thus the non-woven fabric received by the lower material receiving component can be smoothly transferred to the belt conveying mechanism.

[0035] By adopting the above technical solution, the stacked non-woven fabric can fall on the belt feeding mechanism accurately and stably. At present, the cloth receiving mechanism adopts a structure of two alternating operations, that is, after one cloth receiving mechanism finishes receiving the cloth, it moves down to above the feeding mechanism (at the same time, the other cloth receiving mechanism moves to below the cutting roller knife assembly to receive the cloth), and the cloth receiving mechanism quickly contracts to make the stacked non-woven fabric fall on the feeding mechanism.

[0036] This method can basically meet the requirements. Since the feeding mechanism is always running, when the stacked non-woven fabrics fall on the feeding mechanism by free fall, there will be a certain inertia, which may cause the stacked non-woven fabrics to shift. A small amount of shift generally does not affect the packaging of wet wipes, but mainly affects the embossing effect. However, this structure also restricts the production efficiency. For example, if the running speed of structures such as the feeding mechanism is increased, the shift of the stacked non-woven fabrics will increase. In addition, if the number of non-woven fabrics is changed from two rows to three rows, the number of materials falling each time increases, and it is easier to have a situation where the shift of the non-woven fabrics is too large, resulting in the current structure being difficult to meet the three-line production line.

[0037] In the present invention, through the mutually cooperating upper cloth receiving mechanism, lower cloth receiving mechanism and belt conveying mechanism, the lower material receiving component of the lower cloth receiving mechanism has an avoidance gap and can pass through the belt conveying mechanism composed of multiple conveying belts. When the lower material receiving component descends, the stacked non-woven fabrics can be smoothly transferred onto the belt conveying mechanism. Compared with the existing free fall, the situation where the stacked non-woven fabrics shift can be significantly reduced.

[0038] As a further improvement, the upper cloth receiving mechanism includes an upper material receiving component that cooperates with the lower material receiving component. The upper material receiving component has a number of receiving strips arranged at intervals, and the receiving strips and the receiving plate are arranged alternately;

[0039] The upper material receiving component is also connected with a translation mechanism for driving the left and right movement of the upper material receiving component and a lifting mechanism for driving the up and down movement of the upper material receiving component, so that the upper material receiving component can smoothly transfer the received non-woven fabrics to the lower material receiving component.

[0040] By adopting the above technical solutions, the upper cloth receiving mechanism, the lower cloth receiving mechanism and the belt conveying mechanism cooperate with each other to quickly realize the cloth receiving and transfer operations. The specific steps are as follows:

[0041] The cut non-woven fabrics fall on the upper material receiving component;

[0042] The upper material receiving component moves downward and leftward, and the non-woven fabrics are transferred to the lower material receiving component;

[0043] The lower material receiving component gradually descends as the number of stacked non-woven fabrics increases; at the same time, the upper material receiving component moves to the lower left side of the cutting roller knife component to prepare for receiving materials;

[0044] When the number of non-woven fabrics reaches the set value, the lower material receiving component descends, and the non-woven fabrics are transferred to the belt conveying mechanism. At this time, the upper material receiving component moves to the lower part of the cutting roller knife component to receive materials;

[0045] After that, the above steps are repeated.

[0046] As a further improvement, a limiting track is provided below the lower material receiving component. The lower material receiving component is fixedly connected with a limiting block, and the limiting block is slidably assembled on the limiting track. The limiting block is hinged with a connecting rod, and the other end of the connecting rod is hinged with an eccentric wheel, so that the eccentric wheel is driven to rotate by a motor, and then the lower material receiving component is driven to lift in the up and down direction.

[0047] The above structure is relatively stable, not prone to failures, and easy to adjust the lifting frequency. It can better adjust the frequency of the cloth receiving mechanism according to other devices to make it adapt to the production line.

[0048] As a further improvement, the bagging device includes a feeding and conveying mechanism for conveying non-woven fabrics, a lifting mechanism for lifting non-woven fabrics, a pushing mechanism for pushing non-woven fabrics into packaging bags, a packaging bag feeding mechanism for providing packaging bags, a bag expanding mechanism for expanding packaging bags, and a bag taking mechanism for taking materials.

[0049] By adopting the above technical solution, the rapid packaging of wet wipes is realized.

[0050] As a further improvement, the sealing device includes an upper pressing and closing component and a lower pressing and closing component for sealing the packaging bag. Reinforcing cross beams are fixedly connected above the upper pressing and closing component and below the lower pressing and closing component. The thickness of the reinforcing cross beam is not less than 40 mm, and a tightening bolt for tightly pressing the middle position of the upper pressing and closing component or the lower pressing and closing component is also provided on the reinforcing cross beam;

[0051] Heating components are fixedly installed in both the upper pressing and closing component and the lower pressing and closing component, and at least two heating components are provided in the upper pressing and closing component or the lower pressing and closing component.

[0052] By adopting the above technical solution, the problem of incomplete sealing can be avoided. During the test, since the double-row non-woven fabric is changed to a triple-row non-woven fabric, the lengths of the upper pressing and closing component and the lower pressing and closing component increase. When sealing, the packaging bag at the middle position is prone to the situation that the packaging bag is not completely sealed. Although the unsealed length is very short (generally only a few tenths of a millimeter), it still affects the packaging quality.

[0053] Regarding this problem, the present invention solves the packaging problems existing in the triple-row production line by adjusting the thickness of the reinforcing cross beam, tightly pressing the middle position of the upper pressing and closing component or the lower pressing and closing component, and increasing the heat source.

[0054] First, the thickness of the reinforcing cross beam is increased to 40 mm to reduce the deformation of the upper pressing and closing component or the lower pressing and closing component. At the same time, the middle position of the upper pressing and closing component or the lower pressing and closing component is tightly pressed by the tightening bolt to further avoid the deformation of the middle position of the upper pressing and closing component or the lower pressing and closing component when sealing the packaging bag.

[0055] Secondly, the two heating components can make the heat distribution more uniform, covering a wider sealing area and reducing heat blank spots. Even if there are certain temperature differences in each heating tube itself, due to the mutual complementation of the heat of the two heating tubes, the plastic packaging bag can be heated more evenly as a whole, thus improving the sealing effect. The total heat capacity of the two heating tubes increases, providing more sufficient heat. When sealing plastic packaging bags, even in the case of continuous sealing operations, there is enough heat to fully melt the plastic and form a good seal. Moreover, the two heating tubes working simultaneously can reach and maintain the appropriate sealing temperature in a shorter time, reducing the situation of poor sealing caused by insufficient heat or temperature fluctuations.

[0056] The beneficial effects of the above technical solutions of the present invention are as follows:

[0057] 1. By using the buffer device and improving it, the present invention judges whether the three rows of non-woven fabrics are synchronized according to the pressure change, and adjusts the running speed of the non-woven fabrics through the buffer device in a timely manner to realize the synchronous operation of the three rows of non-woven fabrics.

[0058] Moreover, the cost of this device is lower, and there is no need to set up three motors to control and adjust the three rows of non-woven fabrics respectively, so the practicability is better.

[0059] 2. The liquid adding device of the present invention can select different liquid adding methods according to the actual situation, better meeting the needs of different manufacturers.

[0060] 3. The cloth receiving mechanism of the present invention can accurately and smoothly transfer the stacked non-woven fabrics onto the belt conveying mechanism, and there is basically no situation of misalignment or deviation of the stacked non-woven fabrics during the transfer process, better adapting to the three-row production line.

[0061] 4. By adjusting the thickness of the reinforcing cross beam, the middle positions of the upper pressing and lower pressing components are tightened, and a heat source is added, the present invention solves the packaging problems existing in the three-row production line and avoids the situation that the packaging bags in the middle position are not completely sealed.

[0062] 5. The present invention greatly improves the production efficiency of the wet wipe production line in two aspects.

[0063] On the one hand, by improving the double-row non-woven fabric into a three-row non-woven fabric and redesigning the three-row non-woven fabric, the problems of the three-row wet wipe production line are solved one by one, and the production is improved from producing two packs at a time to producing three packs at a time, directly enhancing the production efficiency of wet wipes.

[0064] On the other hand, by improving the fabric receiving mechanism, the sealing device, and strengthening the motor and roller shafts, etc., the operating speed of the equipment is increased, thereby improving production efficiency. The improvement of the fabric receiving mechanism enables it to adapt to a higher-speed production line; the improvement of the sealing device enables it to meet the stable sealing of packaging bags under the condition of high speed and continuity; the strengthening of components such as the motor and roller shafts can ensure that the packaging production line will not have problems such as loose or vibrating parts during high-speed operation, ensuring the stable operation of the production line. Description of the Drawings

[0065] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understood. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0066] Figure 1 is a schematic structural diagram of the three-row synchronous automated production line for wet wipes of the present invention;

[0067] Figure 2 is a schematic partial structure of the three-row synchronous automated production line for wet wipes of the present invention Figure 1 ;

[0068] Figure 3 is Figure 2 the front view of

[0069] Figure 4 is a schematic structural diagram of the buffer device of the three-row synchronous automated production line for wet wipes of the present invention;

[0070] Figure 5 is a schematic structural diagram of the fabric receiving mechanism of the three-row synchronous automated production line for wet wipes of the present invention;

[0071] Figure 6 is Figure 2 the enlarged view of part A of

[0072] Figure 7 is a schematic partial structure of the three-row synchronous automated production line for wet wipes of the present invention Figure 2 ;

[0073] Figure 8 is a schematic structural diagram of the sealing device of the three-row synchronous automated production line for wet wipes of the present invention.

[0074] Description of the Reference Numerals:

[0075] 100. Raw material feeding device; 110. Feeding roller; 120. Cloth receiving device; 200. Slitting device; 300. Buffer device; 310. Fixed roller; 320. Guide track; 330. Mounting plate; 340. Adjusting roller; 350. Cylinder seat; 400. Deviation rectifying and folding device; 410. Deviation rectifying mechanism; 420. Folding mechanism; 500. Liquid adding device; 510. Liquid adding mechanism; 511. Spray head; 512. Immersion tank; 520. Liquid supply mechanism; 600. Cutting device; 610. Cutting roller knife assembly; 620. Cloth receiving mechanism; 621. Lower cloth receiving mechanism; 6211. Lower material receiving assembly; 6212. Limit block; 6213. Limit track; 6124. Connecting rod; 6215. Eccentric wheel; 622. Upper cloth receiving mechanism; 6221. Upper material receiving assembly; 6222. Translation mechanism; 6223. Lifting mechanism; 630. Feeding mechanism; 631. Embossing mechanism; 632. Belt conveying mechanism; 633. Compensation conveying mechanism; 634. Angle adjusting mechanism; 700. Bag sleeving device; 710. Feeding and conveying mechanism; 720. Pushing mechanism; 730. Lifting mechanism; 740. Bag taking mechanism; 750. Bag supporting mechanism; 760. Packaging bag feeding mechanism; 800. Sealing device; 810. Remaining material cutting mechanism; 820. Upper pressing assembly; 830. Lower pressing assembly; 840. Reinforcing cross beam; 900. Discharging device. Detailed implementation manners

[0076] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0077] Currently, in order to further increase the production output of wet wipes, our company subsequently started the research and development of a three-row synchronous automated production line. However, after changing the two-row production line to a three-row production line, many problems have emerged. Such as the synchronization problem of the three rows of non-woven fabrics, the cloth receiving problem of the three-row production line, and the packaging bag sealing problem, etc.

[0078] Regarding the above problems, while the present invention solves the stable operation of the three-row production line, it also increases the operating speed of the equipment and further improves the production efficiency.

[0079] 1. Synchronization problem: In the initial solution, three motors were considered to adjust three non-woven fabrics respectively to achieve synchronous operation of the three non-woven fabrics. However, this increased the cost significantly. Subsequently, we noticed that the change in the speed of the non-woven fabric would be directly reflected in its contact with the fixed roller or the adjusting roller. That is, the speed of the non-woven fabric would directly affect the degree of adhesion between the non-woven fabric and the fixed roller or the adjusting roller. At this time, the force exerted by the non-woven fabric on the fixed roller or the adjusting roller would also change. Therefore, we determined whether the speeds of the three non-woven fabrics were synchronous by detecting the change in the force on the adjusting roller.

[0080] When the external control system detects a change in the pressure of the pressure sensor, it drives the lifting cylinder to descend slightly, increasing the normal pressure of the non-woven fabric on the fixed roller and the adjusting roller through tensioning, thereby increasing the friction force and hindering the progress of the non-woven fabric, reducing the speed. As the lifting cylinder continues to drive the adjusting roller to gradually tighten the other non-woven fabrics, the degree of adhesion of the three non-woven fabrics to the adjusting roller gradually becomes consistent, and then the three rows are kept synchronous. After the three rows of non-woven fabrics are synchronous, the buffer device slowly resets.

[0081] 2. Cloth receiving problem: The existing cloth receiving mechanism makes the stacked non-woven fabrics lack support and then fall onto the feeding mechanism by quickly extracting. However, as the double-row production line is changed to a triple-row production line, the number of non-woven fabrics falling increases, and the situation of the stacked non-woven fabrics shifting will increase. Moreover, the existing cloth receiving mechanism directly limits the operating speed of the feeding mechanism.

[0082] The lower cloth receiving component of the lower cloth receiving mechanism of the present invention has an avoidance gap and can pass through the belt conveying mechanism composed of multiple conveyor belts. When the lower cloth receiving component descends, the stacked non-woven fabrics can be smoothly transferred onto the belt conveying mechanism. Compared with the existing free fall, the situation of the stacked non-woven fabrics shifting can be significantly reduced.

[0083] 3. Sealing problem: Since the double-row non-woven fabric is changed to a triple-row non-woven fabric, the lengths of the upper pressing component and the lower pressing component increase. During sealing, the packaging bags in the middle position are prone to the situation of incomplete sealing, affecting the packaging quality.

[0084] The present invention increases the thickness of the reinforcement cross beam to reduce the deformation of the upper pressing component or the lower pressing component. At the same time, the middle position of the upper pressing component or the lower pressing component is tightened by the tightening bolts to further prevent the deformation of the middle position of the upper pressing component or the lower pressing component during sealing. Preferably, the two heating components can have a more uniform heat distribution, so that a wider sealing area can be covered, reducing the heat blank points. Even in the case of continuous sealing operations, there is enough heat to fully melt the plastic and form a good seal.

[0085] 4. Equipment speed increase: By improving the cloth receiving mechanism, sealing device, and strengthening the motor and roller shafts, etc., the running speed of the equipment is increased, thereby improving production efficiency. The improvement of the cloth receiving mechanism enables it to adapt to a higher-speed production line; the improvement of the sealing device enables it to meet the stable sealing of packaging bags under high-speed and continuous conditions; the strengthening of components such as the motor and roller shafts can ensure that the packaging production line does not have problems such as loose or vibrating components during high-speed operation, ensuring the stable operation of the production line.

[0086] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention will be specifically introduced below. The number of any element in the drawings is for illustration rather than limitation, and any naming is only for distinction and does not have any limiting meaning.

[0087] Below, with reference to several representative embodiments of the present invention, the principle and spirit of the present invention will be elaborated in detail.

[0088] Embodiment 1 of the wet wipe three-row synchronous automated production line provided by the present invention:

[0089] As Figures 1-8 shown, the wet wipe three-row synchronous automated production line includes an equipment frame, and a raw material feeding device 100, a traction device, a slitting device 200, a buffer device 300, a deviation correction and folding device 400, a liquid adding device 500, a cutting device 600, a bagging device 700, a sealing device 800, and a discharging device 900 arranged in sequence from left to right;

[0090] The equipment frame (not marked in the figure) is mainly used for installing various components;

[0091] As Figure 2 shown, the raw material feeding device 100 is installed on the equipment frame. The raw material feeding device 100 is used for feeding and replenishing non-woven fabrics. The advancing direction of the non-woven fabric is defined as the right side; the raw material feeding device 100 includes two feeding rollers 110 for supporting the non-woven fabric. Above the two feeding rollers 110, there is a cloth receiving device 120 for connecting the non-woven fabric. The cloth receiving device 120 ensures the continuous supply of the non-woven fabric. The cloth receiving device 120 is a prior art and is not improved in the present invention, and its structure will not be described in detail here.

[0092] As Figure 2 shown, the traction device (not marked in the figure) is used for pulling the non-woven fabric to advance. This structure is a conventional structure of the wet wipe production line and will not be described in detail here;

[0093] As Figure 2 and Figure 3 described, the slitting device 200 has two blades and is used for slitting the non-woven fabric into three non-woven fabric strips;

[0094] As Figures 2-4As shown, the buffer device 300 has two functions. One is to buffer for fabric changing, and the other is to synchronize the three non-woven fabrics.

[0095] The buffer device 300 includes a number of fixed rollers 310 and a number of adjusting rollers 340. The fixed rollers 310 and the adjusting rollers 340 are arranged alternately in the up-down direction. Below the adjusting rollers 340, there is a lifting cylinder for driving the adjusting rollers 340 to lift and lower. A pressure sensor for detecting the pressure change of the adjusting rollers 340 is also provided between the lifting cylinder and the adjusting rollers 340. Below the fixed rollers 310, there is a vertically arranged guiding track 320. An installation plate 330 is slidably assembled on the guiding track 320. The adjusting rollers 340 are evenly distributed on the installation plate 330 in the horizontal direction. Below the guiding track 320, there is a cylinder seat 350 for fixing the lifting cylinder.

[0096] For the fabric changing operation, when preparing to replace the non-woven fabric roll, the lifting cylinder drives the adjusting rollers 340 to descend, so that the buffer device 300 can store a part of the non-woven fabric for the equipment to use during fabric changing. After the fabric receiving is completed, the buffer device 300 resets.

[0097] When adjusting synchronization, drive the lifting cylinder to descend slightly. According to the friction formula F = μN (where F is the friction force, μ is the friction coefficient, and N is the normal pressure), the tension makes the normal pressure of the non-woven fabric on the fixed rollers 310 and the adjusting rollers 340 increase, so that the friction force increases, hindering the progress of the non-woven fabric and reducing the speed. As the lifting cylinder continues to drive the adjusting rollers 340 to make other non-woven fabrics tightened, the fitting degrees of the three non-woven fabrics with the adjusting rollers 340 gradually become consistent, and then the three rows are synchronized. When the three rows of non-woven fabrics are synchronized, the buffer device 300 slowly resets.

[0098] It should be noted that the above adjustment is mainly fine-tuning. At the beginning of the speed deviation of the three non-woven fabrics, the traveling speeds of the three non-woven fabrics can be kept consistent through the above fine-tuning method, avoiding the further increase of the differential speed, thus greatly improving the running stability of the equipment. (Since the equipment runs at high speed, if the deviation is too large and the synchronization cannot be adjusted in time, the equipment should be stopped in time to avoid the rapid increase of the differential speed of the three non-woven fabrics in a short time).

[0099] As Figure 2 and Figure 3 shown, the deviation rectifying and folding device 400 is used to rectify and fold the non-woven fabric.

[0100] The deviation rectifying and folding device 400 includes a deviation rectifying mechanism 410 and a folding mechanism 420. In the present invention, only the quantity of the deviation rectifying mechanism 410 and the folding mechanism 420 changes, and their structures will not be described in detail here.

[0101] On the right side of the deviation rectifying and folding device 400, there is also a detection photoelectric eye, which is used to detect the situation of the non-woven fabric.

[0102] As Figure 2 and Figure 3 shown, the liquid adding device 500 is used to add liquid to the non-woven fabric. The liquid adding device 500 includes a liquid adding mechanism 510 and a liquid supply mechanism 520;

[0103] The liquid adding mechanism 510 includes a spray head 511 for spraying liquid medicine on the non-woven fabric and an immersion tank 512 for storing liquid medicine to soak and add liquid medicine to the non-woven fabric, so that users can choose the way of adding liquid medicine according to their needs.

[0104] The two ways of adding medicine are convenient for manufacturers to choose different ways of adding medicine according to different needs.

[0105] Compared with direct immersion, spraying is to spray liquid medicine quantitatively as needed, which can accurately control the usage amount of liquid medicine and avoid waste of a large amount of liquid medicine. Especially for some expensive liquid medicines, this way can reduce production costs; in addition, the liquid medicine has less contact with the external environment during the spraying process, and the wet wipes do not need to share an immersion tank 512, reducing the possibility of liquid medicine being contaminated. However, the accuracy control of spraying medicine is relatively more difficult and requires multiple debuggings, which is not as convenient and direct as immersion.

[0106] The advantage of immersion is that the liquid medicine penetrates sufficiently. The wet wipes are completely immersed in the liquid medicine, which can ensure that the liquid medicine fully penetrates into every part of the wet wipes. Whether it is the surface or the inside, the liquid medicine can be evenly absorbed, and the operation is simple, suitable for small-scale production. However, correspondingly, the disadvantage of immersion is that relatively more liquid medicine is wasted, and the liquid medicine in the immersion tank 512 is in contact with the external environment for a long time, and is easily contaminated by dust, microorganisms, etc. in the air, affecting the quality and stability of the liquid medicine.

[0107] There is also a squeezing mechanism (not marked in the figure) on the right side of the liquid adding device 500 for squeezing the non-woven fabric to discharge the excess liquid medicine.

[0108] As Figure 5 and Figure 6 shown, the cutting device 600 is used to cut the non-woven fabric;

[0109] The cutting device 600 includes a cutting roller knife assembly 610 for cutting the non-woven fabric into small pieces. A cloth receiving mechanism 620 for receiving and transferring the non-woven fabric is arranged below the cutting roller knife assembly 610, and a feeding mechanism 630 for conveying the non-woven fabric is also arranged at the lower right of the cloth receiving mechanism 620.

[0110] The cloth receiving mechanism 620 includes an upper cloth receiving mechanism 622620 and a lower cloth receiving mechanism 621620 that cooperates with the upper cloth receiving mechanism 622620. The lower cloth receiving mechanism 621620 includes a lower material receiving component 6211 that can move up and down in the vertical direction. The lower material receiving component 6211 has a number of spaced-apart material receiving plates, and an avoidance gap is formed between the material receiving plates.

[0111] The feeding mechanism 630 includes a belt conveying mechanism 632, a embossing mechanism 631, and a compensation conveying mechanism 633. The embossing mechanism 631 is used to emboss the non-woven fabric. At the same time, the embossing of the non-woven fabric also has a certain deviation correction effect. The compensation conveying mechanism 633 is used for adjustment and compensation. The compensation conveying mechanism 633 is hinged to the belt conveying mechanism 632, so that the inclination angle of the compensation conveying mechanism 633 can be slightly adjusted. Since the compensation conveying mechanism 633 is arranged at the end, when there is a height deviation between the compensation conveying mechanism 633 and the feeding conveying mechanism 710, the angle of the compensation conveying mechanism 633 can be adjusted to enable the compensation conveying mechanism 633 to better cooperate with the feeding conveying mechanism 710.

[0112] A angle adjustment mechanism 634 for adjusting the angle is provided below the compensation conveying mechanism 633. In this embodiment, the angle adjustment mechanism 634 is a cylinder.

[0113] The belt conveying mechanism 632 has a number of spaced-apart conveying belts. The material receiving plates are located in the gaps between the conveying belts, so that the lower material receiving component 6211 can pass through the belt conveying mechanism 632 in the vertical direction, and thus the non-woven fabric received by the lower material receiving component 6211 can be smoothly transferred to the belt conveying mechanism 632.

[0114] The upper cloth receiving mechanism 622620 includes an upper material receiving component 6221 that cooperates with the lower material receiving component 6211. The upper material receiving component 6221 has a number of spaced-apart material receiving strips, and the material receiving strips and the material receiving plates are arranged alternately.

[0115] The upper material receiving component 6221 is also connected with a translation mechanism 6222 for driving the upper material receiving component 6221 to move left and right and a lifting mechanism 6223 for driving the upper material receiving component 6221 to move up and down, so that the upper material receiving component 6221 can smoothly transfer the received non-woven fabric to the lower material receiving component 6211.

[0116] Currently, the cloth receiving mechanism 620 adopts a structure with two alternating operations, that is, after one cloth receiving mechanism 620 finishes receiving the cloth, it moves down to above the feeding mechanism 630 (at the same time, the other cloth receiving mechanism 620 moves to below the cutting roller knife assembly 610 to receive the cloth). The cloth receiving mechanism 620 quickly contracts, so that the stacked non-woven fabric falls on the feeding mechanism 630.

[0117] This method can basically meet the requirements. Since the feeding mechanism 630 is running continuously, when the stacked non-woven fabrics fall onto the feeding mechanism 630 by free fall, there will be a certain inertia, which may cause the stacked non-woven fabrics to shift. A small amount of shift generally does not affect the packaging of wet wipes, but it is mainly likely to affect the embossing effect. However, this structure also restricts the production efficiency. For example, if the running speed of structures such as the feeding mechanism 630 is increased, the shift of the stacked non-woven fabrics will increase; in addition, if the non-woven fabrics are changed from two rows to three rows, the number of materials falling each time increases, and it is easier to have a situation where the shift amount of the non-woven fabrics is too large, resulting in the current structure being difficult to meet the three-line production line.

[0118] In this embodiment, through the mutually cooperating upper cloth receiving mechanism 622620, lower cloth receiving mechanism 621620 and belt conveying mechanism 632, the lower material receiving component 6211 of the lower cloth receiving mechanism 621620 has an avoidance gap and can pass through the belt conveying mechanism 632 composed of multiple conveying belts. When the lower material receiving component 6211 descends, the stacked non-woven fabrics can be smoothly transferred onto the belt conveying mechanism 632. Compared with the existing free fall, the situation where the stacked non-woven fabrics shift can be significantly reduced.

[0119] A limiting track 6213 is provided below the lower material receiving component 6211. The lower material receiving component 6211 is fixedly connected with a limiting block 6212. The limiting block 6212 is slidably assembled on the limiting track 6213. The limiting block 6212 is hinged with a connecting rod 6124, and the other end of the connecting rod 6124 is hinged with an eccentric wheel 6215, so that by driving the eccentric wheel 6215 to rotate through a motor, the lower material receiving component 6211 can be driven to lift and lower in the vertical direction.

[0120] The translation mechanism 6222 and the lifting mechanism 6223 have the same structure as the above.

[0121] The above structure is relatively stable, not prone to failures, and it is easy to adjust the lifting frequency. It can better adjust the frequency of the lower cloth receiving mechanism 621620 according to other devices to make it adapt to the production line.

[0122] As Figure 7 shown, the bagging device 700 is used to push the cut non-woven fabrics into the packaging bags;

[0123] The bagging device 700 includes a feeding and conveying mechanism 710 for conveying non-woven fabrics, a lifting mechanism 730 for lifting non-woven fabrics, a pushing mechanism 720 for pushing non-woven fabrics into packaging bags, a packaging bag feeding mechanism 760 for providing packaging bags, a bag expanding mechanism 750 for expanding packaging bags, and a bag taking mechanism 740 for taking bags.

[0124] The operation steps of the bagging device 700 are as follows:

[0125] The stacked non-woven fabrics are conveyed to the lifting mechanism 730 through the feeding and conveying mechanism 710. The lifting mechanism 730 rises to correspond to the pushing mechanism 720. Meanwhile, the bag-supporting mechanism 750 expands the cut independent packaging bags through the upper and lower negative pressure suction cup assemblies. Then, the bag-taking mechanism 740 extends into the packaging bags, expands the packaging bags and moves them to the right side of the lifting mechanism 730. The pushing mechanism 720 pushes the stacked non-woven fabrics into the packaging bags and pushes the packaging bags to the sealing device 800 for sealing.

[0126] As Figure 7 and Figure 8 shown, the sealing device 800 is used for sealing the packaging bags to complete the wet wipe processing.

[0127] The sealing device 800 includes an upper pressing component 820 and a lower pressing component 830 for sealing the packaging bags. Reinforcing cross beams 840 are fixedly connected above the upper pressing component 820 and below the lower pressing component 830. The thickness of the reinforcing cross beams 840 is 40 mm. Tightening bolts (not shown in the figure) for pressing against the middle position of the upper pressing component 820 or the lower pressing component 830 are also provided on the reinforcing cross beams 840.

[0128] Heating components are fixedly installed in both the upper pressing component 820 and the lower pressing component 830. At least two heating components are provided in the upper pressing component 820 or the lower pressing component 830 of the heating component.

[0129] A surplus material cutting mechanism 810 is also provided on the left side of the upper pressing component 820 to cut off the surplus material of the packaging bags.

[0130] The thickness of the reinforcing cross beams 840 is increased to 40 mm to reduce the deformation of the upper pressing component 820 or the lower pressing component 830. At the same time, the middle position of the upper pressing component 820 or the lower pressing component 830 is pressed tightly by the tightening bolts to further prevent the deformation of the middle position of the upper pressing component 820 or the lower pressing component 830 when the packaging bags are sealed.

[0131] Secondly, the two heating components can make the heat distribution more uniform, cover a wider sealing area and reduce the heat blank points. Even if there are certain temperature differences in each heating tube itself, due to the mutual complement of the heat of the two heating tubes, the packaging bags can be heated more evenly as a whole, thus improving the sealing effect. The total heat capacity of the two heating tubes increases, which can provide more sufficient heat. When sealing plastic packaging bags, even in the case of continuous sealing operations, there is enough heat to fully melt the plastic and form a good seal. Moreover, the two heating tubes working simultaneously can reach and maintain the appropriate sealing temperature in a shorter time, reducing the situation of loose sealing caused by insufficient heat or temperature fluctuations.

[0132] This embodiment also discloses a non-woven fabric feeding method, including the following steps:

[0133] S1. The cut non-woven fabric lands on the upper material receiving component 6221;

[0134] S2. The upper material receiving component 6221 moves downward and leftward, and the non-woven fabric is transferred to the lower material receiving component 6211;

[0135] S3. The lower material receiving component 6211 gradually descends as the stacking quantity of the non-woven fabric increases; meanwhile, the upper material receiving component 6221 moves to the lower left side of the cutting roller knife component 610 to prepare for receiving materials;

[0136] S4. When the quantity of the non-woven fabric reaches the set value, the lower material receiving component 6211 descends, and the non-woven fabric is transported to the belt conveying mechanism 632. At this time, the upper material receiving component 6221 moves to the lower part of the cutting roller knife component 610 to receive materials;

[0137] S5. Then the above steps are repeated.

[0138] Although this specification has shown and described multiple embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, alterations, and alternative ways without departing from the spirit and concept of the present invention. It should be understood that various alternative solutions of the embodiments of the present invention described herein can be adopted in the process of practicing the present invention. The appended claims are intended to define the protection scope of the present invention and thus cover the module compositions, equivalents, or alternative solutions within the protection scope of these claims.

Claims

1. A three-row synchronous automatic production line for wet wipes, comprising: Equipment racks; A raw material feeding device (100) is installed on the equipment frame, and the raw material feeding device (100) is used to feed and replenish non-woven fabrics; the moving direction of the non-woven fabrics is defined as the right side; A traction device, which is used to traction the nonwoven fabric; A slitting device (200), which is used to slit the non-woven fabric into a plurality of non-woven fabric strips, and the slitting device (200) is arranged on the right side of the raw material feeding device (100); A buffer device (300) is used for buffering so as to facilitate cloth changing, and the buffer device (300) is arranged on the right side of the slitting device (200); A deflection-correcting folding device (400) is used to correct the deflection of the nonwoven fabric and fold it. The deflection-correcting folding device (400) is arranged on the right side of the slitting device (200); A liquid adding device (500) is used to add liquid to the non-woven fabric, the liquid adding device (500) comprises a liquid adding mechanism (510) and a liquid supply mechanism (520), and the liquid adding mechanism (510) is arranged on the right side of the deviation correcting folding device (400); A cutting device (600), which is used for cutting non-woven fabrics, and the cutting device (600) is arranged on the right side of the liquid adding mechanism (510); A bagging device (700), which is used to push the cut non-woven fabric into a packaging bag, and the bagging device (700) is arranged on the right side of the cutting device (600); A sealing device (800), which is used to seal the packaging bag to complete the wet wipes processing, and the sealing device (800) is arranged on the right side of the bagging device (700); Characterized in that the slitting device (200) comprises two cutting knives for slitting the non-woven fabric into three non-woven fabric strips; The buffer device (300) comprises a plurality of fixed rollers (310) and a plurality of adjusting rollers (340), wherein the fixed rollers (310) and the adjusting rollers (340) are arranged alternately in the up-down direction, and a lifting cylinder for driving the adjusting rollers (340) to lift is provided below the adjusting rollers (340), and a pressure sensor for detecting pressure changes of the adjusting rollers (340) is also provided directly between the lifting cylinder and the adjusting rollers (340).

2. The three-row synchronous automatic production line for wet wipes according to claim 1 is characterized by: The raw material feeding device (100) comprises two feeding rollers (110) for supporting non-woven fabrics, and a fabric connecting device (120) for connecting the non-woven fabrics is provided above the two feeding rollers (110).

3. The three-row synchronous automatic production line for wet wipes according to claim 1 is characterized by: A vertically arranged guide track (320) is provided below the fixed roller (310), a mounting plate (330) is slidably mounted on the guide track (320), and the adjusting rollers (340) are evenly distributed on the mounting plate (330) in the horizontal direction.

4. The three-row synchronous automatic production line for wet wipes according to claim 1 is characterized by: The liquid adding mechanism (510) comprises a spray head (511) for spraying liquid medicine on the non-woven fabric, and a liquid immersion tank (512) for storing liquid medicine to soak the non-woven fabric with the liquid medicine, so that the user can select the liquid medicine adding method according to the needs.

5. The three-row synchronous automatic production line for wet wipes according to claim 1 is characterized by: The cutting device (600) comprises a cutting roller assembly (610) for cutting the non-woven fabric into small pieces, a fabric receiving mechanism (620) for receiving and transferring the non-woven fabric is provided below the cutting roller assembly (610), and a feeding mechanism (630) for conveying the non-woven fabric is also provided to the lower right of the fabric receiving mechanism (620).

6. The three-row synchronous automatic production line for wet wipes according to claim 5 is characterized by: The cloth-connecting mechanism (620) comprises an upper cloth-connecting mechanism (622) (620) and a lower cloth-connecting mechanism (621) (620) cooperating with the upper cloth-connecting mechanism (622) (620), wherein the lower cloth-connecting mechanism (621) (620) comprises a lower cloth-connecting assembly (6211) which can be raised and lowered in the up-and-down direction, and the lower cloth-connecting assembly (6211) comprises a plurality of cloth-connecting plates arranged at intervals, and avoidance gaps are formed between the cloth-connecting plates; The feeding mechanism (630) comprises a belt conveying mechanism (632), an embossing mechanism (631) and a compensating conveying mechanism (633); the belt conveying mechanism (632) has a plurality of conveying belts arranged at intervals, and the receiving plate is located in the gaps between the conveying belts, so that the lower receiving component (6211) can pass through the belt conveying mechanism (632) in the up and down directions, thereby enabling the non-woven fabric received by the lower receiving component (6211) to be smoothly transferred to the belt conveying mechanism (632).

7. The three-row synchronous automatic production line for wet wipes according to claim 6 is characterized by: The upper fabric receiving mechanism (622) (620) comprises an upper fabric receiving assembly (6221) cooperating with the lower fabric receiving assembly (6211), wherein the upper fabric receiving assembly (6221) comprises a plurality of fabric receiving strips arranged at intervals, and the fabric receiving strips and the fabric receiving plates are arranged in an alternating manner; The upper material receiving assembly (6221) is also connected to a translation mechanism (6222) for driving the upper material receiving assembly (6221) to move left and right, and a lifting mechanism (6223) for driving the upper material receiving assembly (6221) to move up and down, so that the upper material receiving assembly (6221) can smoothly transfer the received non-woven fabric to the lower material receiving assembly (6211).

8. The three-row synchronous automatic production line for wet wipes according to claim 6 or 7, characterized in that: A limiting track (6213) is provided below the lower material connection component (6211), and the lower material connection component (6211) is fixedly connected to a limiting block (6212), and the limiting block (6212) is slidably assembled on the limiting track (6213). The limiting block (6212) is hinged with a connecting rod (6124), and the other end of the connecting rod (6124) is hinged to an eccentric wheel (6215), so that the eccentric wheel (6215) is driven to rotate by a motor, thereby driving the lower material connection component (6211) to rise and fall in the up and down directions.

9. The three-row synchronous automatic production line for wet wipes according to claim 1 is characterized by: The bagging device (700) comprises a feeding and conveying mechanism (710) for conveying non-woven fabrics, a lifting mechanism (730) for lifting the non-woven fabrics, a pushing mechanism (720) for pushing the non-woven fabrics into a packaging bag, a packaging bag loading mechanism (760) for providing a packaging bag, a bag holding mechanism (750) for opening the packaging bag, and a bag taking mechanism (740) for taking materials.

10. The three-row synchronous automatic production line for wet wipes according to claim 1 is characterized by: The sealing device (800) comprises an upper pressing assembly (820) and a lower pressing assembly (830) for sealing the packaging bag, wherein a reinforcing crossbeam (840) is fixedly connected above the upper pressing assembly (820) and below the lower pressing assembly (830), wherein the thickness of the reinforcing crossbeam (840) is not less than 40 mm, and a tightening bolt for tightening the middle position of the upper pressing assembly (820) or the lower pressing assembly (830) is also provided on the reinforcing crossbeam (840); A heating component is fixedly installed in the upper pressing component (820) and the lower pressing component (830), and at least two heating components are arranged in the upper pressing component (820) or the lower pressing component (830).

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