A rotary automatic folding packaging machine and a packaging method thereof

Abstract

The application discloses a rotary automatic folding packaging machine and a packaging method thereof, which comprises a rack, a rotating disc, a mold, a material ejecting mechanism, a first sealing station, a second sealing station, a demolding station and a third sealing station. The water-soluble film is fixed on the adsorption template by negative pressure, and the material ejecting mechanism ejects the toilet block into the mold cavity, so that the water-soluble film wraps the bottom and the side wall of the toilet block, and the left and right side films extend out of the feeding port. The rotating disc drives the mold to rotate in sequence: the first sealing station folds and hot-presses the extended film to form a top seal; the second sealing station hot-presses the seal again to make the seal adhere; the demolding station ejects the toilet block and directly sends the toilet block into the third sealing station; and the third sealing station folds and hot-presses the excess material on the outside of the seal backward and shapes the seal. The application integrates multiple stations through the rotating disc, realizes continuous automatic packaging, cooperates with the three-sealing process, ensures that the seal is firm and flat, and has high packaging efficiency and regular appearance.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, specifically to a rotary automatic folding packaging machine and its packaging method. Background Technology

[0002] Toilet cleaner blocks and similar products are typically packaged with water-soluble film, allowing them to be directly immersed in water for use. The film dissolves upon contact with water, releasing the cleaning ingredients. Current packaging methods are mostly semi-automatic or manual, requiring operators to wrap the water-soluble film around the block and perform folding, heat sealing, and other processes. This is not only inefficient but also results in inconsistent packaging quality, weak seals, and irregular appearance.

[0003] Therefore, it is necessary to propose further solutions to address the aforementioned technical problems. Summary of the Invention

[0004] In view of this, the present invention provides a rotary automatic folding packaging machine to solve the above-mentioned technical problems.

[0005] The objective of this invention is achieved through the following technical solution: a rotary automatic folding packaging machine, comprising a frame, a worktable on the frame, an adsorption template on the worktable, a top material inlet and an adsorption hole for adsorbing a water-soluble film on the adsorption template, the adsorption hole being connected to a negative pressure source via a pipe; a water-soluble film is placed on the adsorption template and covers the top material inlet; a turntable and a drive mechanism for driving the turntable to rotate are rotatably connected to the frame, the turntable being provided with multiple molds, each mold having a cavity for accommodating toilet cleaner blocks and for the water-soluble film to wrap around their bottom, left side wall, right side wall, front side wall, and rear side wall, the cavity having an inlet, and the water-soluble film wrapping the left and right side walls of the toilet cleaner block extending beyond the inlet;

[0006] The ejector mechanism is located below the ejector opening and is used to drive the toilet cleaner block through the ejector opening and then drive the water-soluble film from the inlet into the mold cavity;

[0007] The demolding station is located on the machine frame and is used to demold the toilet cleaning blocks located in the mold cavity;

[0008] The first hot-sealing station is set on the machine frame and is used to fold and overlap the two water-soluble films on the left and right side walls extending out of the feed inlet and outlet and heat-press them to form a seal. The seal is located on the top of the toilet cleaning block.

[0009] The second hot-sealing station is set on the machine frame and is used to heat-press the seal located on the top of the toilet block to make it adhere to the top of the toilet block.

[0010] And a third hot-sealing station, which is set on the machine frame and located on one side of the demolding station; the third hot-sealing station is used to fold the water-soluble film extending from the top of the toilet block on both sides outside the seal backward and then perform hot pressing.

[0011] in,

[0012] The first hot-sealing station, the second hot-sealing station, and the demolding station are arranged sequentially along the rotation direction of the turntable;

[0013] The demolding station includes a demolding push mechanism, the ejection stroke of which can demold the toilet cleaner block and directly send it into the third hot sealing station;

[0014] The drive mechanism drives the turntable to rotate, so that each mold stops sequentially above the ejector mechanism, the first hot sealing station, the second hot sealing station and the demolding station;

[0015] Furthermore, the first hot-sealing station includes upper and lower clamping blocks rotatably connected to the frame. The upper clamping block and the lower clamping block are arranged facing each other on the upper and lower sides of the mold, and the upper clamping block is provided with a first hot-pressing head that contacts the water-soluble film. The upper clamping block and the lower clamping block are driven by a motor to swing in opposite directions, so as to fold the water-soluble film on the left and right side walls extending outside the feed port towards the middle and hot-press it to form the seal.

[0016] Furthermore, the second hot-sealing station includes a second hot-pressing head, which is located above the mold and drives the pressing block to move up or down through the first cylinder, so that it performs secondary hot-pressing on the seal from top to bottom, so that the seal is tightly attached to the top of the toilet block.

[0017] Furthermore, the third hot stamping station includes:

[0018] The receiving platform is used to receive toilet cleaning blocks ejected from the demolding station;

[0019] A pair of guide plates are positioned opposite each other on the receiving platform to form a channel for the toilet cleaner block to move. The width of the channel is less than the total width of the water-soluble film extending from both sides of the top of the toilet cleaner block. This ensures that when the toilet cleaner block is pushed into the channel, the water-soluble film extending from the top is folded backward by the entrance edge of the channel.

[0020] A pair of third hot press heads are positioned opposite each other at the outlet of the channel; they are used to hot press the folded water-soluble film. The two third hot press heads are driven by a second cylinder to move closer or further apart, thereby hot pressing the water-soluble film folded on the left and right side walls of the toilet block.

[0021] Furthermore, the demolding and pushing mechanism includes a mounting bracket and a third cylinder. A first through hole is provided in the center of the turntable. One end of the mounting bracket is fixedly connected to the frame, and the other end passes through the first through hole and is fixedly connected to the cylinder body of the third cylinder. A second through hole is provided at the bottom of the mold, and the piston rod of the third cylinder can pass through the second through hole to enter the mold cavity and push out the toilet cleaning block.

[0022] Furthermore, it also includes a water-soluble film supply mechanism, which is disposed on the worktable. The water-soluble film supply mechanism includes a film feeding assembly for automatically covering the top feed port with a continuous water-soluble film strip and a film cutting assembly for cutting the water-soluble film before each top feed. The film cutting assembly is disposed between the film feeding assembly and the adsorption template.

[0023] Furthermore, the film feeding assembly includes a rotary drive mechanism and a film feeding roller mounted on a worktable. One end of the film feeding roller is rotatably connected to the worktable, and the other end is fixedly connected to the power end of the rotary drive mechanism. Multiple upper rollers are fixed axially on the film feeding roller. Lower rollers, corresponding one-to-one with the upper rollers, are rotatably connected to the worktable. A gap is formed between the upper rollers and the lower rollers to clamp the water-soluble film. The drive mechanism drives the film feeding roller to rotate, so as to continuously convey the water-soluble film forward. The lower rollers rotate passively as the water-soluble film moves. An air blowing pipe is provided between two adjacent upper rollers. The air blowing direction of the air blowing pipe is the same as the moving direction of the water-soluble film, so as to smooth out the water-soluble film that has wrinkled after being output between the upper and lower rollers.

[0024] Furthermore, the film-cutting assembly includes a cutter mounted on the worktable and a lifting drive mechanism for driving the cutter to move up and down. The lifting drive mechanism includes two third guide columns vertically fixed to the worktable, a lifting plate, and a mounting plate. Guide sleeves are slidably connected to the third guide columns, and both ends of the lifting plate are respectively connected to the guide sleeves. The mounting plate is fixedly mounted on the top of the two third guide columns, and a film-cutting cylinder is provided at the center of the mounting plate. The power end of the film-cutting cylinder passes through the mounting plate and is fixedly connected to the center of the lifting plate. The cutter is mounted on the lifting plate and is located above the water-soluble film, used to drive the cutter to move up or down to cut the water-soluble film.

[0025] The present invention also provides a rotary automatic folding packaging method using any of the above-described packaging machines, comprising the following steps:

[0026] Step S1: Place the water-soluble film on the adsorption template so that the water-soluble film covers the top material inlet, and fix the water-soluble film by negative pressure adsorption through the adsorption holes;

[0027] Step S2: Cut the water-soluble membrane using the membrane cutting assembly 111;

[0028] Step S3: The toilet cleaning block is driven upward through the top material opening by the top material mechanism, and the water-soluble film is lifted up. It continues to rise until the toilet cleaning block and the water-soluble film enter the mold cavity together from the inlet. The water-soluble film folds and wraps around the bottom, front and rear side walls and left and right side walls of the toilet cleaning block in the direction of the toilet cleaning block in the mold cavity, and the water-soluble film wrapping the left and right side walls extends out of the inlet.

[0029] Step S4: Drive the mold to the first hot sealing station by the turntable. The lower clamping block rotates upward to cause the water-soluble film below the inlet to fold upward. The upper clamping block rotates downward to cause the water-soluble film above the inlet to fold downward, so that the upper and lower water-soluble films are in contact. At the same time, the first hot press head performs hot pressing to form a seal on the top of the toilet cleaning block.

[0030] Step S5: Drive the mold to rotate to the second hot-sealing station via the turntable to perform a second hot-sealing process on the seal;

[0031] Step S6: Drive the mold to rotate to the demolding station via the turntable, and the demolding push mechanism of the demolding station pushes the toilet cleaner block out of the mold cavity, and uses the ejection stroke to directly send the toilet cleaner block into the third hot sealing station;

[0032] Step S7: In the third hot-sealing station, the water-soluble film extending from the top of the toilet cleaner block outside the seal is folded backward and then hot-pressed by the third hot press head to complete the packaging.

[0033] The beneficial technical effects achieved by this invention are:

[0034] 1. This application integrates multiple workstations (top material, first hot sealing, second hot sealing, demolding) through a turntable, realizing continuous and intermittent automatic operation without manual switching, which greatly improves packaging efficiency.

[0035] 2. The first heat sealing completes the basic sealing, and the second heat sealing is a second heat sealing to ensure that the seal is firmly attached to the top of the toilet cleaner block, prevent the seal from opening due to uneven heating, and ensure the strong adhesion of the seal.

[0036] 3. The film supply mechanism of this application adopts multiple sets of upper and lower rollers for clamping and conveying, and is combined with air blowing pipes to smooth out wrinkles, ensuring a smooth supply of water-soluble film, improving the qualified rate of packaging, and making the appearance flat and beautiful.

[0037] Explanation of reference numerals in the attached drawings: 1-Frame; 2-Workbench; 3-Adsorption template; 31-Top material outlet; 32-Adsorption hole; 4-Turntable; 41-First through hole; 5-Mold; 51-Mold cavity; 52-Inlet; 53-Left side wall; 54-Right side wall; 55-Second through hole; 56-Front side wall; 57-Rear side wall; 58-Bottom; 501-Toilet cleaner block; 502-Water-soluble film; 6-Top material ejection mechanism; 61-Push rod; 62-First push plate; 621-Discharge port; 63-First push cylinder; 64-First guide post; 65-Second guide post; 66-Second push plate; 67-Second push cylinder; 7-First hot sealing station; 71-Upper clamping block; 72-Lower clamping block; 73-First hot press head ; 8-Second hot sealing station; 81-Second hot press head; 82-First cylinder; 9-Demolding station; 91-Third cylinder; 92-Mounting bracket; 10-Third hot sealing station; 101-Receiving platform; 102-Guide plate; 103-Channel; 104-Third hot press head; 105-Second cylinder; 11-Water-soluble film supply mechanism; 111-Film cutting assembly; 1111-Cut tool; 1112-Third guide column; 1113-Lifting plate; 1114-Mounting plate; 1115-Film cutting cylinder; 112-Film feeding assembly; 1121-Rotary drive mechanism; 1122-Film feeding roller; 1123-Upper roller; 1124-Lower roller; 1125-Air blowing pipe.

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of a rotary automatic folding packaging machine according to the present invention;

[0040] Figure 2 This is one of the overall structural schematic diagrams of a rotary automatic folding packaging machine of the present invention after removing the machine frame;

[0041] Figure 3 This is the second schematic diagram of the overall structure of the rotary automatic folding packaging machine of the present invention after removing the frame;

[0042] Figure 4 This is a schematic diagram showing the positional relationship between the adsorption template and the top material mechanism in this invention;

[0043] Figure 5 This is a schematic diagram of the overall structure of the top material mechanism in this invention;

[0044] Figure 6This is a schematic diagram showing the positional relationship between the mold, the toilet cleaner, and the water-soluble film in this invention;

[0045] Figure 7 This is a schematic diagram of the overall structure of the mold in this invention;

[0046] Figure 8 This is a schematic diagram of the overall structure of the third hot-sealing station in this invention;

[0047] Figure 9 This is a schematic diagram showing the positional relationship between the turntable and the first hot-sealing station, the second hot-sealing station, the second hot-sealing station, and the demolding station in this invention;

[0048] Figure 10 This is one of the overall structural schematic diagrams of the water-soluble film supply mechanism in this invention;

[0049] Figure 11 This is the second schematic diagram of the overall structure of the water-soluble film supply mechanism in this invention;

[0050] Figure 12 This is a schematic diagram of the overall structure of the workbench in this invention;

[0051] Figure 13 This is a schematic diagram of the overall structure of the workbench film cutting assembly in this invention. Detailed Implementation

[0052] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Please see Figure 1-13As shown in the figure, a rotary automatic folding packaging machine includes a frame 1, a worktable 2 on the frame 1, an adsorption template 3 on the worktable 2, a top material opening 31 and an adsorption hole 32 for adsorbing a water-soluble film 502 on the adsorption template 3, the adsorption hole 32 being connected to a negative pressure source through a pipe; the water-soluble film 502 is placed on the adsorption template 3 and covers the top material opening 31; a turntable 4 and a drive mechanism (not shown in the figure) for driving the turntable 4 to rotate are rotatably connected to the frame 1; a plurality of molds 5 are provided on the turntable 4, and a cavity 51 is formed on the mold 5 for accommodating the toilet cleaner block 501 and for the folding packaging water-soluble film 502 to wrap its bottom 58, left side wall 53, right side wall 54, front side wall 56, and rear side wall 57; an inlet 52 is provided on the cavity 51, and the water-soluble film 502 wrapping the left and right side walls of the toilet cleaner block 501 extends out of the inlet 52.

[0055] The ejector mechanism 6 is located below the ejector opening 31 and is used to drive the toilet cleaning block 501 through the ejector opening 31 and then drive the water-soluble film 502 into the mold cavity 51 from the inlet 52.

[0056] Demolding station 9, set on frame 1, is used to demold the toilet cleaner block 501 located in mold cavity 51; first hot sealing station 7, set on frame 1, is used to fold and overlap the two water-soluble films 502 extending out of the inlet and outlet 52 on the left and right side walls and heat press them to form a seal, which is located on the top of the toilet cleaner block 501.

[0057] The second heat-sealing station 8, located on the frame 1, is used to heat-press the seal on the top of the toilet cleaner block 501 to adhere it to the top of the toilet cleaner block 501; and the third heat-sealing station 10, located on the frame 1 and to one side of the demolding station 9; the third heat-sealing station 10 is used to fold the water-soluble film 502 extending from the top of the toilet cleaner block 501 outside the seal backward (i.e., fold it towards the front sidewall 56 and the rear sidewall 57), and then perform heat-pressing; wherein,

[0058] The first hot-sealing station 7, the second hot-sealing station 8, and the demolding station 9 are arranged sequentially along the rotation direction of the turntable 4;

[0059] Demolding station 9 includes a demolding push mechanism. The ejection stroke of the demolding push mechanism can demold the toilet cleaner block 501 and send it directly into the third hot sealing station 10.

[0060] The drive mechanism (not shown in the figure) rotates via the turntable 4, causing each mold 5 to stop sequentially above the ejector mechanism 6, the first hot-sealing station 7, the second hot-sealing station 8, and the demolding station 9.

[0061] like Figure 5As shown, in another embodiment of this application, the top material mechanism 6 includes a top push rod 61, a first top push plate 62, a first top push cylinder 63, a first guide post 64, a second guide post 65, a second top push plate 66, and a second top push cylinder 67. The two first guide posts 64 and the two second guide posts 65 are symmetrically suspended below the adsorption template 3. A first guide sleeve is slidably connected to each of the first guide posts 64, and the two sides of the first top push plate 62 are fixedly connected to the guide sleeve. The first top push cylinder 63 is fixedly connected to one side of the first top push plate 62, and its output end is fixedly connected to the adsorption template 3. A discharge port 621 corresponding to the top material port 31 is opened on the first top push plate 62.

[0062] The second guide post 65 is slidably connected to the second guide sleeve; the two sides of the second push plate 66 are fixedly connected to the second guide sleeve; the second push cylinder 67 is fixedly connected to one side of the second push plate 66, and its output end is fixedly connected to the adsorption template 3; one end of the push rod 61 is fixedly connected to the second push plate 66, and the other end extends into the discharge port 621. When the toilet cleaning block 501 enters the discharge port 621, it is placed at the top of the push rod 61.

[0063] Accordingly, during operation, the automatic feeder conveys the toilet cleaner block 501 to the top of the push rod 61 inside the discharge port 621. First, the first push cylinder 63 and the second push cylinder 67 extend simultaneously, pushing the entire first push plate 62, the second push plate 66, and the push rod 61 upwards together, causing the toilet cleaner block 501 at the top of the push rod 61 to lift the water-soluble film 502 and enter the mold cavity 51 of the mold 5. Then, the first push cylinder 63 remains in place, while the second push cylinder 67 continues to extend, causing the push rod 61 to push the toilet cleaner block 501 completely deep into the mold cavity 51, achieving a tight wrapping of the water-soluble film 502 at the bottom of the toilet cleaner block 501.

[0064] like Figure 9 As shown, the first hot-sealing station 7 further includes an upper clamping block 71 and a lower clamping block 72 rotatably connected to the frame 1. The upper clamping block 71 and the lower clamping block 72 are arranged facing each other on the upper and lower sides of the mold 5, and the upper clamping block 71 is provided with a first hot-pressing head 73 that contacts the water-soluble film 502. The upper clamping block 71 and the lower clamping block 72 are driven by a motor (not shown) to swing in opposite directions to fold the water-soluble film 502 extending from the outside of the feed port 52 toward the middle and hot-press it to form a seal. Accordingly, in this embodiment, the upper clamping block 71 is located above the lower clamping block 72, and the upper clamping block 71 and the lower clamping block 72 are staggered. When operating, the lower clamping block 72 swings upward to fold the water-soluble film 502 extending below the feed port 52 upward; at the same time, the upper clamping block 71 swings downward to fold the water-soluble film 502 extending above the feed port 52 downward. When the upper and lower diaphragms meet and overlap, the first hot press head 73 is energized and heated to heat and bond the overlapping diaphragms together, forming a horizontal seal at the top of the toilet cleaning block 501.

[0065] like Figure 9 As shown, in another embodiment of the present invention, the second hot-sealing station 8 includes a second hot-pressing head 81, which is located above the mold 5. The second hot-pressing head 81 is driven by a first cylinder 82 to move upwards or downwards, thus performing a secondary hot-pressing motion on the seal from top to bottom, achieving a tight seal against the top of the toilet cleaner block 501. Accordingly, the secondary hot-pressing ensures the strength of the seal and makes it fit better against the top of the toilet cleaner block 501. Therefore, when the turntable 4 rotates the mold 5 to the second hot-sealing station 8, the inlet 52 on the mold cavity 51 faces upwards towards the second hot-pressing head 81, and the first cylinder 82 drives the second hot-pressing head 81 downwards to perform a secondary hot-pressing motion on the seal.

[0066] Please see Figure 8 and combined Figure 1 , Figure 2 and Figure 3 As shown, in another embodiment of the present invention, the third hot stamping station 10 includes:

[0067] The receiving platform 101 is used to receive the toilet block 501 ejected from the demolding station 9;

[0068] A pair of guide plates 102 are disposed opposite to each other on the receiving platform 101, forming a channel 103 for the toilet cleaning block 501 to move. The width of the channel 103 is less than the total width of the water-soluble film 502 extending from both sides of the top of the toilet cleaning block 501. This causes the water-soluble film 502 extending from the top to be folded backward by the entrance edge of the channel 103 when the toilet cleaning block 501 is pushed into the channel 103.

[0069] A pair of third hot press heads 104 are positioned opposite each other at the outlet of the channel 103; they are used to hot press the folded water-soluble film 502. The two third hot press heads 104 are driven by the second cylinder 105 to move closer or further apart, thereby hot pressing the water-soluble film 502 folded on the left and right side walls of the toilet block 501.

[0070] like Figure 9 As shown, in another embodiment of the present invention, the demolding and pushing mechanism includes a mounting bracket 92 and a third cylinder 91. A first through hole 41 is provided at the center of the turntable 4. One end of the mounting bracket 92 is fixedly connected to the frame 1, and the other end passes through the first through hole 41 and is fixedly connected to the cylinder body of the third cylinder 91. A second through hole 55 is provided at the bottom of the mold 5, and the piston rod of the third cylinder 91 can pass through the second through hole 55 into the mold cavity 51 to push out the toilet cleaner block 501. Accordingly, as... Figure 1As shown, the piston rod of the third cylinder 91 extends horizontally to the left, passes through the second through hole 55 at the bottom of the mold 5, enters the mold cavity 51, and pushes the packaged toilet cleaner block 501 with a sealed top out of the mold 5 to the left. The stroke of the third cylinder 91 is designed such that when the piston rod is fully extended, the toilet cleaner block 501 is directly fed into the third hot-sealing station 10 located to the side of the demolding station 9. Finally, the second cylinder 105 drives the two third hot-pressing heads 104 to approach each other, hot-pressing and shaping the water-soluble film 502 folded back and stacked on the front and rear side walls of the toilet cleaner block 501. At this point, the entire packaging process of the water-soluble film 502 of the toilet cleaner block 501 is completed, and the finished product has a flat shape. Accordingly, in this technical solution, the piston rod of the third cylinder 91 directly pushes the toilet cleaner block 501 out of the mold cavity 51 into the channel 103 of the third hot sealing station 10. The toilet cleaner block 501 entering the channel 103 can be pushed and moved by the next toilet cleaner block 501 entering the channel 103, and so on. The first toilet cleaner block 501 entering the channel 103 is pushed and moved between the two third hot press heads 104 by the Nth toilet cleaner block 501 entering the channel 103, and is pushed and moved out of the two third hot press heads 104 by the N+1th toilet cleaner block 501 entering the channel 103 before entering the finished product collection device for collection.

[0071] Please see Figure 9 and combined Figure 1 , Figure 2 and Figure 3 As shown, in another embodiment of the present invention, the turntable 4 rotates intermittently via an indexing drive mechanism, causing each mold 5 to sequentially stop above the ejector mechanism 6, the first hot-sealing station 7, the second hot-sealing station 8, and the demolding station 9. In this embodiment, the indexing drive mechanism is preferably a cam divider, which can be purchased directly from the market by those skilled in the art and installed according to the instruction manual.

[0072] Furthermore, such as Figure 10 and Figure 11 As shown, the frame 1 also includes a water-soluble film 502 supply mechanism 11, which is set on the workbench 2. The water-soluble film 502 supply mechanism 11 includes a film feeding assembly 112 for automatically covering the continuous water-soluble film 502 strip onto the top feed port 31 and a film cutting assembly 111 for cutting the water-soluble film 502 before each top feed. The film cutting assembly 111 is set between the film feeding assembly 112 and the adsorption template 3.

[0073] like Figure 10 , Figure 11 and Figure 12As shown, in another embodiment of the present invention, the film feeding assembly 112 includes a rotary drive mechanism 1121 and a film feeding roller 1122 mounted on the worktable 2. One end of the film feeding roller 1122 is rotatably connected to the worktable 2, and the other end is fixedly connected to the power end of the rotary drive mechanism 1121. A plurality of upper rollers 1123 are fixedly mounted on the film feeding roller 1122 along the axial direction. Lower rollers 1124, corresponding one-to-one with the upper rollers 1123, are rotatably connected to the worktable 2. A gap is formed between the upper rollers 1123 and the lower rollers 1124. The gap between the water-soluble film 502 and the rotating drive mechanism 1121 drives the film feeding roller 1122 to rotate, so as to continuously convey the water-soluble film 502 forward. The lower roller 1124 rotates passively as the water-soluble film 502 moves. An air blowing pipe 1125 is provided between two adjacent upper rollers 1123. The air blowing direction of the air blowing pipe 1125 is the same as the moving direction of the water-soluble film 502, so as to smooth out the wrinkled water-soluble film 502 that is output from between the upper roller 1123 and the lower roller 1124. Accordingly, it is ensured that the water-soluble film 502 does not accumulate wrinkles. In this embodiment, the rotating drive mechanism is preferably a motor.

[0074] It should be noted that the frame 1 of this technical solution is also equipped with a water-soluble film winding device. The water-soluble film winding device here is existing technology and will not be described in detail. In the initial state, one end of the water-soluble film to be used is wound on the water-soluble film winding device, and the other end is manually pulled into the film feeding assembly 112.

[0075] like Figure 13 As shown, in another embodiment of the present invention, the film cutting assembly 111 includes a cutter 1111 disposed on the worktable 2 and a lifting drive mechanism for driving the cutter to move up and down. The lifting drive mechanism includes two third guide columns 1112 vertically fixed to the worktable 2, a lifting plate 1113, and a mounting plate 1114. A guide sleeve is slidably connected to the third guide column 1112, and both ends of the lifting plate 1113 are respectively connected to the guide sleeve. The mounting plate 1114 is fixed to the top of the two third guide columns 1112, and a film cutting cylinder 1115 is disposed at the center of the mounting plate 1114. The power end of the film cutting cylinder 1115 passes through the mounting plate 1114 and is fixedly connected to the center of the lifting plate 1113. The cutter 1111 is mounted on the lifting plate 1113 and is located above the water-soluble film 502, and is used to drive the cutter 1111 to move up or down to cut the water-soluble film 502. Accordingly, the film-cutting cylinder 1115 drives the lifting plate 1113 to fall along the third guide column 1112, which in turn drives the cutter 1111 to cut the continuously conveyed water-soluble film 502 to a predetermined length. The cut film covers the top material port 31 of the adsorption template 3, waiting for the next top material feeding.

[0076] The present invention also provides a rotary automatic folding packaging method using any of the above-mentioned packaging machines, comprising the following steps:

[0077] Step S1: The water-soluble membrane 502 is conveyed to the adsorption template 3 by the membrane feeding assembly 112, so that the water-soluble membrane 502 covers the top material port 31, and the water-soluble membrane 502 is fixed by negative pressure adsorption through the adsorption hole 32.

[0078] Step S2: Cut the water-soluble membrane 502 using the membrane cutting assembly 111;

[0079] Step S3: The toilet cleaning block 501 is driven upward through the top material opening 31 by the top material mechanism 6, and the water-soluble film 502 is lifted up. It continues to rise until the toilet cleaning block 501 and the water-soluble film 502 enter the mold cavity 51 together from the inlet 52. The water-soluble film 502 is gathered and folded in the direction of the toilet cleaning block 501 in the mold cavity 51, wrapping the bottom, front and rear side walls and left and right side walls of the toilet cleaning block 501. The water-soluble film 502 wrapping the left and right side walls extends out of the inlet 52.

[0080] Step S4: Drive the mold 5 to rotate to the first hot sealing station 7 via the turntable 4. The lower clamping block 72 rotates upward to cause the water-soluble film 502 below the feed port 52 to fold upward. The upper clamping block 71 rotates downward to cause the water-soluble film 502 above the feed port 52 to fold downward, so that the upper and lower water-soluble films 502 are attached together. At the same time, the first hot press head 73 performs hot pressing to form a seal on the top of the toilet cleaning block 501.

[0081] Step S5: Drive the mold 5 to rotate to the second hot stamping station 8 via the turntable 4 to perform a second hot stamping on the seal;

[0082] Step S6: Drive the mold 5 to rotate to the demolding station 9 via the turntable 4. The demolding push mechanism of the demolding station 9 will push the toilet cleaner block 501 out of the mold cavity 51 and use the ejection stroke to send the toilet cleaner block 501 directly into the third hot sealing station 10.

[0083] Step S7: In the third hot-sealing station 10, the water-soluble film 502 extending from the top of the toilet cleaner block 501 outside the seal is folded backward, and then hot-pressed by the third hot press head 104 to complete the packaging. The above provides a detailed description of a rotary automatic folding packaging machine and its packaging method provided by the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for helping to understand the core ideas of the present invention; at the same time, for those skilled in the art, there will be changes in specific implementation methods and application scope based on the ideas and methods of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0084] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary automatic folding packaging machine, characterized in that, include: The machine frame includes a worktable with an adsorption template. The adsorption template has a top material inlet and adsorption holes for adsorbing the water-soluble film. The adsorption holes are connected to a negative pressure source via pipes. The water-soluble film is placed on the adsorption template and covers the top material inlet. A turntable and a drive mechanism for rotating the turntable are rotatably connected to the machine frame. The turntable has multiple molds with cavities for accommodating toilet cleaning blocks and for folding and packaging the water-soluble film to wrap their bottom, left side wall, right side wall, front side wall, and rear side wall. The mold cavities have inlets, and the water-soluble film wrapping the left and right side walls of the toilet cleaning block extends beyond the inlets. The ejector mechanism is located below the ejector opening and is used to drive the toilet cleaner block through the ejector opening and then drive the water-soluble film from the inlet into the mold cavity; The demolding station is located on the machine frame and is used to demold the toilet cleaning blocks located in the mold cavity; The first hot-sealing station is set on the machine frame and is used to fold and overlap the two water-soluble films on the left and right side walls extending out of the feed inlet and outlet and heat-press them to form a seal. The seal is located on the top of the toilet cleaning block. The second hot-sealing station is set on the machine frame and is used to heat-press the seal located on the top of the toilet block to make it adhere to the top of the toilet block. And a third hot-sealing station, which is set on the machine frame and located on one side of the demolding station; the third hot-sealing station is used to fold the water-soluble film extending from the top of the toilet block on both sides outside the seal backward and then perform hot pressing. in, The first hot-sealing station, the second hot-sealing station, and the demolding station are arranged sequentially along the rotation direction of the turntable, and the demolding station includes a demolding push mechanism. The ejection stroke of the demolding push mechanism can demold the toilet cleaner block and directly send it into the third hot-sealing station. The driving mechanism drives the turntable to rotate, so that each mold stops sequentially above the ejector mechanism, the first hot-sealing station, the second hot-sealing station, and the demolding station.

2. The rotary automatic folding packaging machine according to claim 1, characterized in that, The material feeding mechanism includes a push rod, a first push plate, a first push cylinder, a first guide post, a first push plate, a second guide post, a second push plate, and a second push cylinder. The two first guide posts and the two second guide posts are symmetrically suspended below the adsorption template. Each of the first guide columns is slidably connected to a first guide sleeve, and both sides of the first push plate are fixedly connected to the guide sleeve; the first push cylinder is fixedly connected to one side of the first push plate, and its output end is fixedly connected to the adsorption template; the first push plate is provided with a discharge port corresponding to the top material port. Each of the second guide columns is slidably connected to a second guide sleeve; both sides of the second push plate are fixedly connected to the second guide sleeve; the second push cylinder is fixedly connected to one side of the second push plate, and its output end is fixedly connected to the adsorption template. One end of the push rod is fixedly connected to the second push plate, and the other end extends into the discharge port. When the toilet cleaner block enters the discharge port, it is placed at the top of the push rod.

3. The rotary automatic folding packaging machine according to claim 1, characterized in that, The first hot-sealing station includes upper and lower clamping blocks rotatably connected to the frame. The upper clamping block and the lower clamping block are arranged facing each other on the upper and lower sides of the mold, and the upper clamping block is provided with a first hot-pressing head that contacts the water-soluble film. The upper clamping block and the lower clamping block are driven by a motor to swing in opposite directions, so as to fold the water-soluble film on the left and right side walls extending outside the feed port toward the middle and hot-press it to form the seal.

4. A rotary automatic folding packaging machine according to claim 1, characterized in that, The second hot-sealing station includes a second hot-pressing head, which is located above the mold and drives the pressing block to move up or down through a first cylinder, so that it performs secondary hot-pressing on the seal from top to bottom, so that the seal is tightly attached to the top of the toilet block.

5. A rotary automatic folding packaging machine according to claim 1, characterized in that, The third hot stamping station includes: The receiving platform is used to receive toilet cleaning blocks ejected from the demolding station; A pair of guide plates are positioned opposite each other on the receiving platform to form a channel for the toilet cleaner block to move. The width of the channel is less than the total width of the water-soluble film extending from both sides of the top of the toilet cleaner block. This ensures that when the toilet cleaner block is pushed into the channel, the water-soluble film extending from the top is folded backward by the entrance edge of the channel. A pair of third hot press heads are positioned opposite each other at the outlet of the channel; they are used to hot press the folded water-soluble film. The two third hot press heads are driven by a second cylinder to move closer or further apart, thereby hot pressing the water-soluble film folded on the left and right side walls of the toilet block.

6. A rotary automatic folding packaging machine according to claim 1, characterized in that, The demolding and pushing mechanism includes a mounting bracket and a third cylinder. A first through hole is provided in the center of the turntable. One end of the mounting bracket is fixedly connected to the frame, and the other end passes through the first through hole and is fixedly connected to the cylinder body of the third cylinder. A second through hole is provided at the bottom of the mold, and the piston rod of the third cylinder can pass through the second through hole to enter the mold cavity and push out the toilet cleaning block.

7. A rotary automatic folding packaging machine according to claim 1, characterized in that, It also includes a water-soluble film supply mechanism, which is disposed on the worktable. The water-soluble film supply mechanism includes a film feeding assembly for automatically covering the top feed port with a continuous water-soluble film strip and a film cutting assembly for cutting the water-soluble film before each top feed. The film cutting assembly is disposed between the film feeding assembly and the adsorption template.

8. A rotary automatic folding packaging machine according to claim 7, characterized in that, The film feeding assembly includes a rotary drive mechanism and a film feeding roller mounted on a worktable. One end of the film feeding roller is rotatably connected to the worktable, and the other end is fixedly connected to the power end of the rotary drive mechanism. Multiple upper rollers are fixed axially on the film feeding roller. Lower rollers, corresponding one-to-one with the upper rollers, are rotatably connected to the worktable. A gap is formed between the upper rollers and the lower rollers to hold the water-soluble film. The drive mechanism drives the film feeding roller to rotate, so as to continuously convey the water-soluble film forward. The lower rollers rotate passively as the water-soluble film moves. An air blowing pipe is provided between two adjacent upper rollers. The air blowing direction of the air blowing pipe is the same as the moving direction of the water-soluble film, so as to smooth out the water-soluble film that has wrinkled after being output between the upper and lower rollers.

9. A rotary automatic folding packaging machine according to claim 8, characterized in that, The film-cutting assembly includes a cutter mounted on the worktable and a lifting drive mechanism for driving the cutter to move up and down. The lifting drive mechanism includes two third guide columns vertically fixed to the worktable, a lifting plate, and a mounting plate. Guide sleeves are slidably connected to the third guide columns, and both ends of the lifting plate are respectively connected to the guide sleeves. The mounting plate is fixedly mounted on the top of the two third guide columns, and a film-cutting cylinder is located at the center of the mounting plate. The power end of the film-cutting cylinder passes through the mounting plate and is fixedly connected to the center of the lifting plate. The cutter is mounted on the lifting plate and is located above the water-soluble film, used to drive the cutter to move up or down to cut the water-soluble film.

10. A rotary automatic folding packaging method using the packaging machine according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step S1: Place the water-soluble film on the adsorption template so that the water-soluble film covers the top material inlet, and fix the water-soluble film by negative pressure adsorption through the adsorption holes; Step S2: Cut the water-soluble membrane using the membrane cutting assembly; Step S3: The toilet cleaning block is driven upward through the top material opening by the top material mechanism, and the water-soluble film is lifted up. It continues to rise until the toilet cleaning block and the water-soluble film enter the mold cavity together from the inlet. The water-soluble film folds and wraps around the bottom, front and rear side walls and left and right side walls of the toilet cleaning block in the direction of the toilet cleaning block in the mold cavity, and the water-soluble film wrapping the left and right side walls extends out of the inlet. Step S4: Drive the mold to the first hot sealing station by the turntable. The lower clamping block rotates upward to cause the water-soluble film below the inlet to fold upward. The upper clamping block rotates downward to cause the water-soluble film above the inlet to fold downward, so that the upper and lower water-soluble films are in contact. At the same time, the first hot press head performs hot pressing to form a seal on the top of the toilet cleaning block. Step S5: Drive the mold to rotate to the second hot-sealing station via the turntable to perform a second hot-sealing process on the seal; Step S6: Drive the mold to rotate to the demolding station via the turntable, and the demolding push mechanism of the demolding station pushes the toilet cleaner block out of the mold cavity, and uses the ejection stroke to directly send the toilet cleaner block into the third hot sealing station; Step S7: In the third hot-sealing station, the water-soluble film extending from the top of the toilet cleaner block outside the seal is folded backward and then hot-pressed by the third hot press head to complete the packaging.

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