Cutting device for paper diaper production

Abstract

The cutting device for paper diaper production comprises a bottom plate, a first pressing roller, a second pressing roller, a cutting hole, a cutting frame, a pressing plate, a die cutter, a first telescopic mechanism and a first driving roller, the lower portion of the pressing plate is connected with the die cutter, the pressing plate is provided with a plurality of air outlet holes in the vertical direction, the air outlet holes are jointly connected with an air source, and the first telescopic mechanism is connected with the first driving roller. The first telescopic mechanism is connected with the cutting frame, the pressing plate is connected with the first telescopic mechanism, an opening is formed in the middle of the cutting plate, a first connecting part is arranged below the cutting plate and connected with the bottom plate, a groove matched with the die cutter in shape is formed between the cutting plate and the cutting hole, and the groove is located under the die cutter. The first driving roller is partially located in the opening, and the outer wall of the first driving roller protrudes out of the upper surface of the cutting plate. The cutting device for paper diaper production provided by the invention can effectively avoid cutter sticking, belongs to the technical field of paper diaper cutting equipment, and is applied to a paper diaper production line.

Description

Technical Field

[0001] The present invention relates to the technical field of diaper cutting equipment, and particularly relates to a cutting device for diaper production. Background Art

[0002] A diaper is a product with strong water absorption, which mainly includes an inner layer in contact with the human skin, a water absorption core layer, and an outer layer to prevent leakage. The water absorption core layer is located in the middle. Generally, the outer layer is a plastic film, and the inner layer and the outer layer are bonded by hot melt adhesive.

[0003] Currently, the production line of diapers mainly includes an assembly process, a cutting process, and a packaging process. After the raw materials are assembled and bonded in the assembly process, the semi-finished diapers enter the cutting device along the conveyor rollers. After cutting, they enter the packaging device through the conveyor rollers for folding and packaging. In the existing cutting device during the cutting process, generally, two mutually cooperating die-cutting rollers rub against each other to achieve cutting. However, due to the existence of hot melt adhesive between the inner layer and the outer layer of the diaper, the heat generated by the die-cutting rollers during continuous cutting will cause partial melting of the hot melt adhesive, resulting in sticking of the knife. The fiber debris generated during the cutting process cannot be effectively cleaned. Moreover, after cutting, the finished diapers may shift when entering the packaging process, resulting in the need for repositioning and placement when entering the packaging process to be successfully packaged by the packaging device. Summary of the Invention

[0004] The purpose of the present invention is to provide a cutting device for diaper production to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0005] To solve the above technical problems, the technical solutions adopted by the present invention are as follows: First of all, the present invention provides a cutting device for diaper production, including: A bottom plate, on one side of the bottom plate is connected a first pressing roller, on the other side of the bottom plate is connected a second pressing roller, and the bottom plate is provided with a cutting hole, and the cutting hole is located between the first pressing roller and the second pressing roller; A cutting frame, the cutting frame is arranged above the cutting hole and is connected to the bottom plate; A cutting module, the cutting module includes a pressing plate, a die-cutting knife, and a first telescopic mechanism. The first telescopic mechanism is arranged below the cutting frame and is connected to the cutting frame. The first telescopic mechanism is connected to the pressing plate below, and the die-cutting knife is fixedly connected below the pressing plate. The pressing plate is provided with a plurality of air outlet holes, and the air outlet holes discharge air downward. A plurality of the air outlet holes are jointly connected to an air source, and a plurality of the air outlet holes are evenly distributed along the contour of the die-cutting knife on the inner side and the outer side of the die-cutting knife.

[0006] The semi-finished product diaper outer layer to be processed is in close contact with the bottom plate. Under the action of the first pressing roller and the second pressing roller, it moves from the first pressing roller to the second pressing roller and maintains a certain tension during the movement. The shape of the cutting plate is consistent with the unfolded shape of the finished diaper, and the shape of the die-cutting knife is also consistent with the unfolded shape of the diaper. The die-cutting knife is integrally annular. The die-cutting knife moves up and down under the action of the first telescopic mechanism following the pressing plate. The first driving roller moves the cut diaper finished product towards the second pressing roller, and after passing through the second pressing roller, it moves towards the subsequent packaging process. The cut waste moves downward through the second pressing roller to the next processing process. After being cut, the waste is wound up by a waste winder located above the outside after passing through the second pressing roller, without affecting the continuous conveyance of the cut diaper finished product.

[0007] When one side of the cut diaper finished product touches the second pressing roller, the other side of the diaper finished product is on the first driving roller and is about to completely leave the first driving roller. Let the length of the diaper be L1, and the distance between the first driving roller and the second pressing roller be L2. The value of L1 is not less than L2.

[0008] During cutting, the air source continuously outputs through the air outlet holes. During the downward relative movement of the pressing plate, since the distance between the pressing plate and the semi-finished diaper gradually decreases, the force of the gas acting on the semi-finished diaper gradually increases. When the die-cutting knife cuts the semi-finished diaper, the force of the gas acting on the diaper reaches its peak. Then the die-cutting knife starts to rise, and the gas presses the cut diaper finished product to prevent the outer plastic film from being lifted by the die-cutting knife and affecting the next cutting. During the rising process of the die-cutting knife, the pressure of the gas acting on the cut diaper finished product gradually decreases. Compared with the negative pressure adsorption method, by spraying gas from top to bottom and changing the distance between the pressing plate and the diaper to be processed during cutting, the method of enabling the pressure acting on the diaper finished product to be variable can prevent the semi-finished diaper from being overly adsorbed.

[0009] The gas jets out from the air outlet holes. Part of the gas jets onto the inner wall of the die-cutting knife and acts downward on the diaper along the inner wall of the die-cutting knife, pressing the semi-finished diaper while transferring the heat generated during the mutual friction between the die-cutting knife and the pressing plate to the air, dissipating heat from the die-cutting knife, preventing the die-cutting knife from melting the hot melt adhesive inside the semi-finished diaper during continuous cutting, facilitating the solution of the problem of the hot melt adhesive sticking to the knife during continuous cutting, and blowing the fiber fragments and metal powder generated by metal friction during cutting towards the lower part of the cutting hole to avoid contaminating the diaper finished product. The heat carried away by the gas cannot melt the hot melt adhesive between the inner and outer layers of the diaper.

[0010] Furthermore, there is an angle of 30 degrees to 60 degrees between the axis of part of the air outlet holes and the vertical direction, so that the gas ejected from the air outlet holes is obliquely ejected from the pressing plate to the inner wall of the die-cutting knife and presses downward along the inner wall of the die-cutting knife.

[0011] As an extension of the above solution, the pressing plate includes a first upper cover and a first lower plate arranged relatively below the first upper cover. The air outlet holes are arranged on the first lower plate. A second connecting portion is provided at the top of the first upper cover, and the second connecting portion is connected to the first telescopic mechanism. A cavity is enclosed between the first upper cover and the first lower plate. An air inlet hole is provided at the center of the top of the first upper cover, and the air inlet hole is connected to a gas source, and the air inlet hole is communicated with the cavity. Such a setting enables the gas output from the gas source to be first dispersed and buffered through the cavity and then ejected from the air outlet holes respectively, which is beneficial to uniform gas outlet.

[0012] As an extension of the above solution, a semiconductor refrigeration sheet is provided at the intersection of the outer wall of the die-cutting knife and the first lower plate. The cold end of the semiconductor refrigeration sheet is attached to the outer wall of the die-cutting knife, the upper part of the cold end of the semiconductor refrigeration sheet is connected to the first lower plate, and the hot end of the semiconductor refrigeration sheet is arranged between the air outlet hole and the outer wall of the die-cutting knife.

[0013] Adhering the refrigerating side of the semiconductor refrigeration sheet to the outer ring of the die-cutting knife can further reduce the temperature of the die-cutting knife during operation, avoid the temperature rise of the die-cutting knife caused by repeated friction, and avoid the local melting of the hot melt adhesive and the resulting sticking of the knife. In addition, since the semiconductor refrigeration sheet is also in contact with the first lower plate locally, the semiconductor refrigeration sheet will also cool down the pressing plate, so that the temperature of the gas passing through the pressing plate is also reduced, further enhancing the heat dissipation effect on the die-cutting knife. After the heat generated by the hot end of the semiconductor refrigeration sheet is transferred to the air by the gas ejected from the air outlet hole, it is not sufficient to melt the hot melt adhesive and does not affect the disposable diaper located inside the inner ring of the die-cutting knife.

[0014] As an extension of the above solution, a first buckle is provided on the outer wall of the pressing plate. By adding the first buckle, it is beneficial to fix the power cord of the semiconductor refrigeration sheet.

[0015] As an extension of the above solution, a cutting device for producing disposable diapers further includes a cutting plate. The cutting plate is located in the middle of the cutting hole. The upper surface of the cutting plate is flush with the bottom plate. The cutting plate is provided with a first connecting portion, and the first connecting portion is connected to the bottom plate. The cutting plate is located directly below the die-cutting knife. The shape of the cutting plate is adapted to the shape of the inner wall of the die-cutting knife. A driving roller hole is provided on the cutting plate, and the first connecting portion is arranged below the driving roller hole; The first driving roller is disposed below the driving roller hole and connected to the first connecting portion. The axis of the first driving roller is parallel to the axis of the first pressing roller, and a part of the first driving roller protrudes from the driving roller hole; The first telescopic mechanism moves the pressing plate up and down reciprocally, so that the die cutting knife and the cutting plate cooperate to cut the semi-finished diaper.

[0016] The outer surface of the first driving roller is wrapped with a silica gel sleeve. Since the outer layer material of the diaper is generally a water-impermeable plastic, under the action of the gas ejected from the air outlet hole, the friction between the plastic layer of the semi-finished diaper and the first driving roller can be increased, which is beneficial to the continuous movement of the cut finished diaper under the action of the first driving roller. In addition, it can also make the semi-finished diaper closely adhere to the first driving roller during the cutting process, without displacement, and avoid defects such as serrated edges or uneven cut edges of the produced finished diaper due to displacement during cutting.

[0017] At the same time, the first pressing roller and the second pressing roller are also wrapped with silica gel sleeves to enhance the friction between the first pressing roller and the second pressing roller and the diaper during the transmission process, so that neither the semi-finished diaper nor the finished diaper will shift during the transmission process. After coming out of the second pressing roller, the cut finished diaper in this process can be smoothly transmitted to the next process under the action of the second pressing roller.

[0018] In this solution, by setting the inner wall of the die cutting knife to closely cooperate with the edge of the cutting plate to reduce the distance between the inner wall of the die cutting knife and the cutting plate, it is possible to avoid a large amount of space for downward displacement of the outer plastic film of the diaper when the die cutting knife is pressed down, and avoid uneven cut edges of the outer plastic film. By applying air pressure to the edge to be cut, the probability of the outer plastic film extending downward is reduced. At the same time, since there is the first driving roller in the area corresponding to the middle of the die cutting knife under the diaper to be cut, there is friction between the surface of the first driving roller and the outer plastic film of the diaper to be cut. Therefore, no air outlet holes are provided in the middle area of the pressing plate, and to avoid air flow disorder caused by setting too many air outlet holes, so that the debris generated by cutting is not blown away.

[0019] As an extension of the above solution, the first connecting portion includes a first connecting column and a second connecting column. The first connecting column is connected to the bottom plate, one end of the second connecting column is connected to the cutting plate, the other end of the second connecting column is connected to the first connecting column, and the first driving roller is connected to the second connecting column. By such a setting method, the connection structure between the cutting plate and the bottom plate can be made simpler. Since the extension distance of the die cutting knife below the cutting plate is limited, setting the first connecting portion below the cutting plate can make full use of the space below the bottom plate.

[0020] As an extension of the above solution, a cutting device for diaper production further includes a second telescopic mechanism. The second telescopic mechanism is arranged between the first connecting column and the second connecting column, and the first connecting column is connected to the second connecting column through the second telescopic mechanism.

[0021] By arranging the second telescopic mechanism between the first connecting column and the second connecting column, the height difference between the surface of the cutting plate and the surface of the bottom plate can be quickly adjusted, making the installation and commissioning of the equipment more rapid. Further, a third telescopic mechanism can be arranged between the first driving roller and the second connecting column to quickly adjust the distance between the outer wall surface of the first driving roller and the surface of the cutting plate.

[0022] As an extension of the above solution, a cutting device for diaper production further includes a first rotating device and a manipulator. The first rotating device is arranged on the top of the cutting frame. An image recognition sensor and a temperature detection sensor are connected below the manipulator, and the manipulator is connected to the first rotating device.

[0023] By setting the image recognition sensor, an image of the edge of the cut finished diaper can be collected. The data collected by the image recognition sensor is transmitted back to the connected industrial control computer. The detection system on the industrial control computer compares the transmitted data with the preset data. If there are obvious protrusions or gaps in the image of the edge of the diaper collected, the detection system will determine that the cutting quality does not meet the standard, output a signal to control the movement of the manipulator, so that the manipulator can clamp the cut finished diaper, move upward and then rotate outside the bottom plate to remove the finished diaper with unqualified quality, and then reset, realizing the waste removal process during the cutting process.

[0024] On the other hand, the absorbent core may absorb too much moisture in the air and deteriorate. After deterioration, the temperature change in this area will be lower than normal. The temperature detection sensor is also connected to the industrial control computer. The temperature detection sensor is used to collect the surface temperature of the area corresponding to the absorbent core on the diaper. After the cut diaper is conveyed out of the cutting area, it passes through the temperature detection sensor. The temperature detection sensor transmits the signal back to the detection system. When there is an error between the detected temperature and the preset temperature, such as the detected temperature is more than 0.5 degrees Celsius lower than the preset temperature, a signal will be output to control the manipulator to remove the cut diaper with quality problems.

[0025] As an extension of the above solution, the manipulator includes a first arm arranged in the horizontal direction and a second arm arranged in the vertical direction. An extensible arm that moves vertically is provided on the second arm, and a clamping claw is connected to the lower end of the extensible arm. One end on the left side of the first arm is connected to the first rotating device, and one end on the right side of the first arm is connected to the second arm. The second arm is located on the right side of the second pressing roller. The image recognition sensor and the temperature detection sensor are connected below the first arm, and the image recognition sensor is arranged on the right side of the temperature detection sensor. This structural form of the manipulator is relatively simple, and the image recognition sensor and the temperature detection sensor are connected to the first arm. Especially when the image recognition sensor and the temperature detection sensor are connected below the first arm, and the image recognition sensor is arranged on the right side of the temperature detection sensor, the acquisition distance can be shortened. Setting a waste rejection mechanism on the cutting device can compress the production stations of the production line.

[0026] During the process of removing the finished diapers that do not meet the quality standards, the detection system will obtain the state of the manipulator 800. When the state of the manipulator 800 is not reset, the cutting work and the movement work of the first driving roller will be suspended, and the operation will resume after the manipulator 800 is reset, ensuring the production quality of the finished diapers.

[0027] As an extension of the above solution, with the position of the second pressing roller as the relative left side, a positioning baffle is arranged on the right side of the second pressing roller, and the positioning baffle is connected to the bottom plate. Since the cut diapers will enter the packaging process after passing through the second pressing roller, setting a positioning baffle on the right side of the second pressing roller can correct the direction of the cut diapers again after they come out of the second pressing roller, avoiding deviation in position when entering the packaging process and affecting the subsequent processes.

[0028] The cutting device for diaper production provided by the present invention strengthens the cutting effect by reducing the distance between the inner wall of the die-cutting knife and the cutting plate, performing gas cooling treatment on the die-cutting knife, and using gas to position the semi-finished diapers to be processed, effectively avoiding sticking of the knife. The finished diapers after cutting can be orderly transported to the next packaging link, and waste rejection treatment can be carried out during the cutting process, which can compress the length of the production line. Description of the Drawings

[0029] The following further describes the present invention in conjunction with the drawings and embodiments; Figure 1 is a schematic diagram of the cutting device for diaper production provided by the present invention; Figure 2 is a partial bottom view of the cutting device for diaper production provided by the present invention; Figure 3It is a partial schematic diagram of the cutting device for diaper production provided by the present invention; Figure 4 It is an overall schematic diagram of the cutting device for diaper production provided by the present invention; Figure 5 It is a schematic diagram of the first connection part provided by the embodiment; Figure 6 It is a partial sectional view of the cutting module provided by the embodiment.

[0030] In the drawings: 100, bottom plate; 101, first pressing roller; 102, second pressing roller; 103, cutting hole; 104, storage box; 200, cutting frame; 300, cutting module; 301, pressing plate, 3011, first upper cover; 3012, first lower plate; 3013, second connection part; 3014, first buckle; 3015, first upper cover plate; 3016, upper cover flange; 302, die cutting knife; 303, first telescopic mechanism; 304, air outlet hole; 305, air inlet hole; 400, cutting plate; 401, first connection part, 4011, first connection column; 4012, second connection column; 4013, second telescopic mechanism; 4014, third telescopic mechanism; 500, first driving roller; 501, driving roller hole; 600, semiconductor refrigeration sheet; 700, first rotating device; 800, manipulator; 801, first arm; 802, second arm; 803, telescopic arm; 804, clamping claw; 900, image recognition sensor; 901, temperature detection sensor; 902, positioning baffle. Detailed Description of the Embodiment

[0031] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0033] In the description of the present invention, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is more than two. Understand that greater than, less than, exceeding, etc. do not include the present number, and above, below, within, etc. are understood to include the present number.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as "setting", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0035] Referring to Figures 1 to 6 , several embodiments of a cutting device for producing disposable diapers according to the present invention are given below.

[0036] As Figures 1 to 5 shown, a cutting device for producing disposable diapers includes: A bottom plate 100, a first pressing roller 101 is connected to one side of the bottom plate 100, a second pressing roller 102 is connected to the other side of the bottom plate 100, a cutting hole 103 is provided on the bottom plate 100, and the cutting hole 103 is located between the first pressing roller 101 and the second pressing roller 102; A cutting frame 200, the cutting frame 200 is arranged between the first pressing roller 101 and the second pressing roller 102 and is connected to the bottom plate 100; A cutting module 300, the cutting module 300 includes a pressing plate 301, a die cutting knife 302, and a first telescopic mechanism 303. The first telescopic mechanism 303 is arranged below the cutting frame 200 and is connected to the cutting frame 200. The first telescopic mechanism 303 is connected to the pressing plate 301 below, the die cutting knife 302 is fixedly connected below the pressing plate 301, a plurality of air outlet holes 304 are provided on the pressing plate 301, the air outlet holes 304 discharge air downward, a plurality of the air outlet holes 304 are commonly connected to a gas source, and a plurality of the air outlet holes 304 are uniformly distributed along the contour of the die cutting knife 302 on the inner side and the outer side of the die cutting knife 302.

[0037] A cutting plate 400, an opening is provided on the cutting plate 400, a first connecting portion 401 is provided below the cutting plate 400, the first connecting portion 401 is connected to the bottom plate 100, the cutting plate 400 is located directly below the die cutting knife 302, the shape of the cutting plate 400 is adapted to the inner wall of the die cutting knife 302, the number of the openings is two, and the two openings are symmetrically arranged at both ends of the cutting plate in the left-right direction; A first driving roller 500, the first driving roller 500 is connected to the first connecting portion 401, the axis of the first driving roller 500 is parallel to the axis of the first pressing roller 101, a part of the first driving roller 500 is located in the opening, and the outer wall of the first driving roller 500 protrudes from the upper surface of the cutting plate 400. The number of the first driving rollers 500 is 2.

[0038] Positioning baffle 902, with the position where the second pressing roller 102 is located as the relative left side, a positioning baffle 902 is arranged on the right side of the second pressing roller 102, and the positioning baffle 902 is connected to the bottom plate 100.

[0039] Among them, in order to make the air outlet more uniform, the pressing plate 301 includes a first upper cover 3011 and a first lower plate 3012. The first lower plate 3012 is arranged relatively below the first upper cover 3011. The air outlet holes 304 are arranged on the first lower plate 3012. A second connecting portion 3013 is arranged at the top of the first upper cover 3011, and the second connecting portion 3013 is connected to the first telescopic mechanism 303. A cavity is enclosed between the first upper cover 3011 and the first lower plate 3012. An air inlet hole 305 is arranged at the center of the top of the first upper cover 3011, and the air inlet hole 305 is connected to an air source, and the air inlet hole 305 is communicated with the cavity. Such a setting enables the gas output from the air source to be first dispersed and buffered through the cavity and then sprayed out from the air outlet holes respectively, which is beneficial to uniform air outlet.

[0040] As Figure 6 shown, in order to make the processing of the pressing plate 301 more convenient, it can be set that the first upper cover 3011 includes a first upper cover plate 3015 and an upper cover surrounding piece 3016. A first annular groove is arranged on the first upper cover plate 3015, and a sealing ring is arranged in the first annular groove. The first annular groove is also arranged on the first lower plate 3012. During installation, the upper cover surrounding piece 3016 is simultaneously clamped into the first annular grooves on the first upper cover plate 3015 and the first lower plate 3012, and then fixed by means of bolt tightening or welding.

[0041] The semi-finished diaper moves from the first pressing roller 101 to the second pressing roller 102 under the action of the first pressing roller 101 and the second pressing roller 102, and maintains a certain tension during the movement. The shape of the cutting plate 400 is consistent with the unfolded shape of the finished diaper, and the shape of the die-cutting knife 302 is also consistent with the unfolded shape of the diaper. The die-cutting knife 302 is integrally annular. The die-cutting knife 302 moves up and down under the action of the first telescopic mechanism 303 following the pressing plate 301, constantly repeating the action of entering and exiting the cutting hole 103. When the die-cutting knife 302 enters the cutting hole, the inner wall of the die-cutting knife 302 closely cooperates with the outer wall of the cutting plate 400 to cut the semi-finished diaper passing through this section to obtain the finished diaper. During cutting, the pressing plate 301 will move downward but does not contact the bottom plate 100.

[0042] The first driving roller 500 moves the cut finished diaper products in the direction of the second pressing roller 102, and after passing through the second pressing roller 102, they move to the subsequent packaging process. The cut waste materials are wound by a waste winder arranged above the outside after passing through the second pressing roller 102, without affecting the continuous conveyance of the cut finished diapers. It should be noted that when one side of the finished diaper after cutting touches the second pressing roller 102, the other side of the finished diaper is on the first driving roller 500 and is about to completely leave the first driving roller 500. Assuming the length of the diaper is L1 and the distance between the first driving roller 500 and the second pressing roller 102 is L2, the value of L1 is not less than L2.

[0043] The outer surface of the first driving roller 500 is wrapped with a silica gel sleeve. Since the outer layer material of the diaper is generally a waterproof plastic film, under the action of the gas ejected from the air outlet holes, the friction between the plastic layer of the semi-finished diaper and the first driving roller 500 can be increased, which is beneficial to the continuous movement of the cut finished diaper under the action of the first driving roller 500. In addition, it can also make the semi-finished diaper closely adhere to the first driving roller 500 during the cutting process, without displacement, avoiding defects such as serrated edges or uneven cut edges in the produced finished diaper due to displacement during cutting.

[0044] During cutting, the air source continuously outputs through the air outlet holes 304. During the downward relative movement of the pressing plate 301, since the distance between the pressing plate 301 and the semi-finished diaper gradually decreases, the acting force of the gas on the semi-finished diaper gradually increases. When the die-cutting knife 302 cuts off the semi-finished diaper, the acting force of the gas on the diaper reaches the peak. Then the die-cutting knife 302 starts to rise, and the gas presses the cut finished diaper to prevent the plastic film from being lifted by the die-cutting knife 302 and affecting the next cutting. During the rising process of the die-cutting knife 302, the pressure of the gas acting on the cut finished diaper gradually decreases. Compared with the negative pressure adsorption method, by spraying gas from top to bottom and changing the distance between the pressing plate 301 and the diaper to be processed during cutting, the method of achieving variable pressure acting on the finished diaper can avoid excessive adsorption of the semi-finished diaper.

[0045] When the gas jets out from the air outlet downward, part of the gas is ejected onto the inner wall of the die-cutting knife 302 and acts downward along the inner wall of the die-cutting knife 302 on the diaper. While pressing the semi-finished diaper tightly, it transfers the heat generated during the mutual friction between the die-cutting knife 302 and the cutting plate 400 to the air, dissipating heat from the die-cutting knife 302, avoiding the melting of the hot melt adhesive between the inner and outer layers of the semi-finished diaper due to the temperature rise of the die-cutting knife 302 during continuous cutting, facilitating the solution of the problem of the hot melt adhesive sticking to the knife during continuous cutting, and being able to blow the fiber fragments and metal powders generated by metal friction during the cutting process downward to the cutting hole, avoiding contaminating the finished diaper. And the heat carried away by the gas cannot melt the hot melt adhesive between the inner and outer layers of the diaper.

[0046] Since when cutting, the semi-finished diaper is most likely to be displaced at the moment when the die-cutting knife 302 presses downward. At this time, the edge of the semi-finished diaper to be cut is under the greatest force, and the outer plastic film of the diaper is also most likely to stick to the knife at this time. By applying air pressure to the edge to be cut, the probability of the downward extension of the outer plastic film is reduced. At the same time, since there is the first driving roller 500 in the area corresponding to the middle of the die-cutting knife 302 below the diaper to be cut, and there is a frictional force between the surface of the first driving roller 500 and the outer plastic film of the diaper to be cut, so the air outlet is not provided in the middle area of the pressing plate 301 to avoid drilling too many holes in the first lower plate 3012 and avoid the air flow disorder caused by setting too many air outlets, so that the debris generated by cutting is blown away.

[0047] At the same time, the first pressing roller 101 and the second pressing roller 102 are also wrapped with silica gel sleeves to enhance the frictional force of the first pressing roller 101 and the second pressing roller 102 on the diaper during the transmission process, so that neither the semi-finished diaper nor the finished diaper will shift during the transmission process. After coming out of the second pressing roller 102, the cut finished diaper in this process can be smoothly transmitted to the next process under the action of the second pressing roller 102. Further, there is an angle of 30 degrees to 60 degrees between the axis of part of the air outlets 304 and the vertical direction, so that the gas ejected from the air outlets 304 is obliquely ejected from the pressing plate 301 to the inner wall of the die-cutting knife 302 and presses downward along the inner wall of the die-cutting knife 302.

[0048] The fiber fragments or metal powders blown downward by the gas will be blown into the storage box 104 to avoid secondary pollution. Preferably, a magic tape can be connected below the cutting hole 103 to bond the filter bag, so that the filter bag can be quickly cleaned.

[0049] In some embodiments, a thermoelectric cooler 600 is provided at the intersection of the outer wall of the die-cutting blade 302 and the first lower plate 3012. The cold end of the thermoelectric cooler 600 is attached to the outer wall of the die-cutting blade 302, the upper part of the cold end of the thermoelectric cooler 600 is connected to the first lower plate 3012, and the hot end of the thermoelectric cooler 600 is disposed between the air outlet 304 and the outer wall of the die-cutting blade 302.

[0050] Adhering the refrigerating side of the thermoelectric cooler 600 to the outer ring of the die-cutting blade 302 can further lower the temperature of the die-cutting blade 302 during operation, avoiding the increase in the temperature of the die-cutting blade 302 caused by repeated friction, and thus avoiding the sticking of the die-cutting blade due to the partial melting of the hot melt adhesive. In addition, since the thermoelectric cooler 600 is also in contact with the first lower plate 3012 locally, the thermoelectric cooler 600 will also cool the pressure plate 301, reducing the temperature of the gas passing through the pressure plate 301 and further enhancing the heat dissipation effect on the die-cutting blade 302. Since the gas coming out of the air outlet 304 is oblique, when the gas impinges on the heat dissipation fins of the hot end of the thermoelectric cooler 600, it dissipates heat from the heat dissipation fins, and the heat is transferred to the air. After the heat generated by the hot end of the thermoelectric cooler 600 is transferred to the air by the gas ejected from the air outlet 304, it is not sufficient to melt the hot melt adhesive. The finished disposable diapers to be retained are located inside the ring of the die-cutting blade 302, and the heat generated by the thermoelectric cooler 600 will not affect the cut finished disposable diapers either.

[0051] The number of the thermoelectric coolers 600 is four, which are respectively placed at the four corners of the outer ring of the die-cutting blade 302 to facilitate uniform heat dissipation of the die-cutting blade 302.

[0052] Furthermore, a first buckle 3014 is provided on the outer wall of the pressure plate 301. By adding the first buckle 3014, it is beneficial to fix the power cord of the thermoelectric cooler 600. A plurality of the first buckles 3014 are respectively arranged on the first lower plate 3012, the upper cover gasket 3016 and the first upper cover plate 3015, so that the power cord of the thermoelectric cooler 600 is arranged along the outer wall of the pressure plate from below the pressure plate to the center of the top of the pressure plate. The best arrangement is that the distance from the power cord of the thermoelectric cooler 600 to the center of the top of the pressure plate is the shortest. The power cords of the plurality of thermoelectric coolers 600 are arranged in the same way.

[0053] The first buckle 3014 has a buckle bottom plate in contact with the pressing plate and a buckle body connected to the power cord of the semiconductor refrigeration sheet 600. The buckle bottom plate and the buckle body are integrally formed. The buckle body is in the shape of a circular tube to allow the power cord to pass through. It has a buckle opening. With the axial extension direction of the buckle body as the front-back direction, the buckle bottom plate is located on the right side of the buckle body, and the buckle opening is located on the lower side of the buckle body. The buckle opening is vertically downward, and the opening angle of the buckle opening is 30 degrees. The buckle bottom plate is adhesively fixed to the pressing plate, which is convenient for installing and fixing the power cord.

[0054] Since the existing disposable diaper production line includes multiple workstations, in order to compress the length of the production line and save production space, one workstation can be set to achieve multiple functions. In some embodiments, a cutting device for disposable diaper production further includes a waste removal function. Specifically, it includes a first rotating device 700 and a manipulator 800. The first rotating device 700 is arranged on the top of the cutting frame 200. The manipulator 800 is connected to an image recognition sensor 900 and a temperature detection sensor 901 below, and the manipulator 800 is connected to the first rotating device 700.

[0055] The manipulator 800 includes a first arm 801 arranged in the horizontal direction and a second arm 802 arranged in the vertical direction. The second arm 802 is provided with a telescopic arm 803 that moves vertically. The lower end of the telescopic arm 803 is connected to a clamping claw 804. The left end of the first arm 801 is connected to the first rotating device 700, and the right end of the first arm 801 is connected to the second arm 802. The second arm 802 is located on the right side of the second pressing roller 102. The image recognition sensor 900 and the temperature detection sensor 901 are connected below the first arm 801, and the image recognition sensor 900 is arranged on the right side of the temperature detection sensor 901.

[0056] By setting the image recognition sensor 900, the image of the edge of the cut finished disposable diaper can be collected. The data collected by the image recognition sensor 900 is transmitted back to the connected industrial control computer. The detection system on the industrial control computer compares the transmitted data with the preset data. If there are obvious protrusions or gaps in the image of the edge of the disposable diaper collected, the detection system will determine that the cutting quality does not meet the standard, output a signal to control the movement of the manipulator 800, so that the manipulator 800 can clamp the cut finished disposable diaper, move upward and then rotate outside the bottom plate, remove the finished disposable diaper with unqualified quality, and then reset, so as to complete the waste removal process in the cutting process.

[0057] On the other hand, the absorbent core may absorb excessive moisture in the air and deteriorate. After deterioration, the temperature change in this area will be lower than normal. The temperature detection sensor 901 is also connected to the industrial control computer. The temperature detection sensor 901 is used to collect the surface temperature of the area corresponding to the absorbent core on the diaper. After the cut diaper is conveyed out of the cutting area, it passes through the temperature detection sensor 901. The temperature detection sensor 901 transmits the collected data back to the detection system. When there is an error between the detected temperature and the preset temperature, such as the detected temperature is more than 0.5 degrees Celsius lower than the preset temperature, a signal is output to control the manipulator 800 to remove the cut diaper with quality problems. The image recognition sensor 900 is arranged on the right side of the temperature detection sensor 901, which can shorten the acquisition distance.

[0058] In the process of removing the substandard finished diapers in the above embodiment, the detection system will obtain the state of the manipulator 800. When the state of the manipulator 800 is not reset, the cutting work and the movement work of the first driving roller are suspended, and the operation is continued after the manipulator 800 is reset, so as to ensure the production quality of the finished diapers.

[0059] As Figure 5 shown, in some embodiments, in order to simplify the device structure and facilitate installation and debugging, the first connecting portion 401 includes a first connecting column 4011 and a second connecting column 4012. The first connecting column 4011 is connected to the bottom plate 100. One end of the second connecting column 4012 is connected to the cutting plate 400, and the other end of the second connecting column 4012 is connected to the first connecting column 4011. The first driving roller 500 is connected to the second connecting column 4012. Through this setting method, the connection structure between the cutting plate 400 and the bottom plate 100 can be made simpler. Since the die-cutting knife 302 extends downward from the cutting plate 400, arranging the first connecting portion 401 below the cutting plate 400 can make full use of the space below the bottom plate 100, and there is no need to set a fixing mechanism above the bottom plate 100 to fix the cutting plate 400.

[0060] A second telescopic mechanism 4013 is further provided between the first connecting column 4011 and the second connecting column 4012, and the second telescopic mechanism 4013 is respectively connected to the first connecting column 4011 and the second connecting column 4012. By providing the second telescopic mechanism 4013 between the first connecting column 4011 and the second connecting column 4012, the height difference between the surface of the cutting plate 400 and the surface of the bottom plate 100 can be quickly adjusted, making the installation and debugging of the equipment more rapid. Further, a third telescopic mechanism 4014 is provided between the first driving roller 500 and the second connecting column 4012 to quickly adjust the distance between the outer wall surface of the first driving roller 500 and the surface of the cutting plate 400.

[0061] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A cutting device for diaper production, characterized in that Including: A bottom plate (100), with a first pressing roller (101) connected to one side of the bottom plate (100), a second pressing roller (102) connected to the other side of the bottom plate (100), a cutting hole (103) provided on the bottom plate (100), and the cutting hole (103) is located between the first pressing roller (101) and the second pressing roller (102); A cutting frame (200), which is arranged above the cutting hole (103) and connected to the bottom plate (100); A cutting module (300), the cutting module (300) includes a pressing plate (301), a die cutting knife (302), and a first telescopic mechanism (303). The first telescopic mechanism (303) is arranged below the cutting frame (200) and connected to the cutting frame (200). The pressing plate (301) is connected below the first telescopic mechanism (303), and the die cutting knife (302) is fixedly connected below the pressing plate (301). The pressing plate (301) is provided with a plurality of air outlet holes (304), the air outlet holes (304) discharge air downward, and a plurality of the air outlet holes (304) are jointly connected to a gas source. A plurality of the air outlet holes (304) are evenly distributed along the contour of the die cutting knife (302) inside and outside the die cutting knife (302).

2. The cutting device for producing disposable diapers according to claim 1, characterized in that: The pressing plate (301) includes a first upper cover (3011) and a first lower plate (3012) arranged relatively below the first upper cover (3011). The air outlet holes (304) are arranged on the first lower plate (3012). A second connecting portion (3013) is provided at the top of the first upper cover (3011), and the second connecting portion (3013) is connected to the first telescopic mechanism (303). A cavity is enclosed between the first upper cover (3011) and the first lower plate (3012). An air inlet hole (305) is provided at the center of the top of the first upper cover (3011), the air inlet hole (305) is connected to the gas source, and the air inlet hole (305) communicates with the cavity.

3. The cutting device for diaper production according to claim 2, characterized in that: A semiconductor refrigeration sheet (600) is provided at the intersection of the outer wall of the die cutting knife (302) and the first lower plate (3012). The cold end of the semiconductor refrigeration sheet (600) is attached to the outer wall of the die cutting knife (302), the upper part of the cold end of the semiconductor refrigeration sheet (600) is connected to the first lower plate (3012), and the hot end of the semiconductor refrigeration sheet (600) is arranged between the air outlet hole (304) and the outer wall of the die cutting knife (302).

4. The cutting device for producing disposable diapers according to claim 3, characterized in that: A first buckle (3014) is provided on the outer wall of the pressing plate (301).

5. The cutting device for producing diapers according to claim 1, characterized in that: It further includes a cutting plate (400) which is located in the middle of the cutting hole (103). The upper surface of the cutting plate (400) is flush with the bottom plate (100). The cutting plate (400) is provided with a first connecting portion (401), and the first connecting portion (401) is connected to the bottom plate (100). The cutting plate (400) is located directly below the die cutting knife (302). The shape of the cutting plate (400) is adapted to the inner wall shape of the die cutting knife (302). A driving roller hole (501) is provided on the cutting plate (400), and the first connecting portion (401) is arranged below the driving roller hole (501). A first driving roller (500) is arranged below the driving roller hole (501) and is connected to the first connecting portion (401). The axis of the first driving roller (500) is parallel to the axis of the first pressing roller (101). A part of the first driving roller (500) protrudes from the driving roller hole (501). The first telescopic mechanism (303) moves the pressing plate (301) up and down reciprocally, so that the die cutting knife (302) and the cutting plate (400) cooperate to cut the semi-finished diaper.

6. The cutting device for producing diapers according to claim 5, characterized in that: The first connecting portion (401) includes a first connecting column (4011) and a second connecting column (4012). The first connecting column (4011) is connected to the bottom plate (100). One end of the second connecting column (4012) is connected to the cutting plate (400), and the other end of the second connecting column (4012) is connected to the first connecting column (4011). The first driving roller (500) is connected to the second connecting column (4012).

7. The cutting device for producing disposable diapers according to claim 6, characterized in that: It further includes a second telescopic mechanism (4013) which is arranged between the first connecting column (4011) and the second connecting column (4012). The first connecting column (4011) is connected to the second connecting column (4012) through the second telescopic mechanism.

8. The cutting device for producing disposable diapers according to claim 1, characterized in that: It further includes a first rotating device (700) and a manipulator (800). The first rotating device (700) is arranged on the top of the cutting frame (200). An image recognition sensor (900) and a temperature detection sensor (901) are connected to the manipulator (800). The manipulator (800) is connected to the first rotating device (700).

9. The cutting device for producing disposable diapers according to claim 8, characterized in that: The manipulator (800) includes a first arm (801) arranged in the horizontal direction and a second arm (802) arranged in the vertical direction. A telescopic arm (803) that moves vertically is provided on the second arm (802). A clamping claw (804) is connected to the lower end of the telescopic arm (803). One end on the left side of the first arm (801) is connected to the first rotating device (700). One end on the right side of the first arm (801) is connected to the second arm (802). The second arm (802) is located on the right side of the second pressing roller (102). The image recognition sensor (900) and the temperature detection sensor (901) are connected below the first arm (801).

10. The cutting device for diaper production according to claim 1, characterized in that: Taking the position where the second pressing roller (102) is located as the relative left side, a positioning baffle (902) is provided on the right side of the second pressing roller (102). The positioning baffle (902) is connected to the bottom plate (100).

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