Transfusion bag slitter edge removing device

Abstract

The invention relates to the technical field of infusion bag processing, in particular to an infusion bag slitter edge removing device which comprises a lower die mechanism, the lower die mechanism comprises a first main body, a second butt joint groove is formed in the top of the first main body, and a discharging opening is formed in the position, close to the second butt joint groove, of the top of the first main body in a penetrating mode; the upper die mechanism is arranged above the lower die mechanism, the upper die mechanism comprises a downward pressing module, the downward pressing module is sleeved with a hot pressing welding head, the outer portion of the hot pressing welding head is slidably connected with a cutter, and a butt joint plate is arranged at the position, located above the discharging opening, of one end of the cutter; the outer wall, located between the butt joint plates, of the cutter is provided with a first wedge-shaped face, and the downward pressing module comprises a second main body slidably connected with the inner wall of the hot pressing welding head. Integrated welding and slitter edge removal are carried out on the same station, the film is prevented from deviating due to transmission, slitter edge residues and burrs are reduced, the edge pressing assemblies are linked to inhibit film springback, notches are kept flat, and multiple components are linked to remove slitter edges.

Description

Technical Field

[0001] This invention relates to the field of infusion bag processing technology, and in particular to a device for removing waste edges from infusion bags. Background Technology

[0002] In the production of infusion bags, multi-layer plastic films (such as PVC film and non-PVC composite film) need to be heat-welded to form the shape. The waste edges generated after welding need to be removed to ensure product precision and safety. At present, the industry mostly adopts a step-by-step processing mode. First, the film is heat-sealed at the welding station to form the bag outline by heating the mold. Then, the semi-finished product is transferred to the waste edge removal station by conveyor belt or robotic arm. After secondary positioning, the waste edges are removed by the cutting device.

[0003] However, this step-by-step approach has significant limitations: welding and cutting are done at different stations. During the transfer of semi-finished products, the film's flexibility makes it prone to stretching and deformation, and the vibration of the transfer mechanism can easily cause positioning misalignment, resulting in residual waste edges, numerous burrs on the cut edges, and even damage to the welded edges of the bag, reducing the product qualification rate. After welding, the film edges will spring back due to temperature changes and elasticity. However, in existing technologies, the long interval between welding and cutting makes it impossible to suppress this springback, further exacerbating the deviation in cutting accuracy. At the same time, the waste edges after cutting often adhere to the bag due to molten residue from welding, which is difficult to completely detach by gravity or negative pressure alone. This can easily accumulate and clog the mold or conveyor line, requiring frequent shutdowns for cleaning, and may also contaminate the bag, increasing medical safety risks. Summary of the Invention

[0004] This invention provides a waste edge removal device for infusion bags to solve the problems mentioned in the background art, such as the film positioning deviation caused by the transfer between different work stations in the production of infusion bags, which reduces the pass rate; the long interval between welding and cutting makes it difficult to limit the rebound, thus aggravating the accuracy deviation; and the waste edge is difficult to remove, easily accumulates and blocks, and poses a risk of pollution.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: providing a waste edge removal device for infusion bags, including a lower mold mechanism, the lower mold mechanism including a main body, a docking groove 2 is provided on the top of the main body, and a discharge port is provided through the top of the main body near the docking groove 2;

[0006] The upper mold mechanism is located above the lower mold mechanism. The upper mold mechanism includes a lower pressing module. A hot pressing welding head is sleeved on the outside of the lower pressing module. A cutter is slidably connected to the outside of the hot pressing welding head. A butt plate is provided at one end of the cutter above the material outlet. A wedge-shaped surface is provided on the outer wall of the cutter between the butt plates.

[0007] The pressing module includes a main body two that is slidably connected to the inner wall of the hot pressing welding head. The main body two has several mounting grooves inside, and a pressing edge assembly is provided inside the mounting groove. A pressing plate is slidably installed inside the main body two above the pressing edge assembly. A top plate is fixedly installed on the top of the main body two, and a connecting cylinder is fixedly connected to the top of the top plate. A pressing drive rod is slidably connected inside the connecting cylinder.

[0008] The present invention is further configured such that an extension plate is provided on the side of the pressing drive rod near the docking plate, one end of the extension plate extends through the connecting cylinder to the position above the docking plate, a push rod is slidably connected to the bottom of the end of the extension plate above the docking plate, the bottom end of the push rod extends to the docking plate, and a second locking block is provided on the bottom end of the push rod near the wedge-shaped surface, and a docking interface is opened on one side of the second locking block.

[0009] The present invention is further configured such that a spring is provided at the bottom of the pressing drive rod, one end of which is connected to the pressing plate; three connecting bolts are symmetrically arranged on both sides of the push rod; a connecting groove is provided on the inner wall of the connecting plate corresponding to the position of the connecting bolt; and one end of the connecting bolt extends to the inner wall of the connecting groove and is slidably connected.

[0010] The present invention is further configured such that the pressing edge assembly includes a mating block that is slidably connected to the inner wall of the mounting groove, the mating block has a mating surface on the side near the lower pressing plate, the lower pressing plate has a pressing surface at the bottom corresponding to the mating surface, and the top of the mating block is provided with an elastic element II whose end is connected to the inner wall of the mounting groove.

[0011] The present invention is further configured such that a pressing block is slidably connected to the bottom of the mating block, a connecting bolt is provided at the top of the pressing block where it connects to the mating block, a limiting hole is provided at the bottom of the mating block corresponding to the position of the connecting bolt, one end of the connecting bolt extends into the limiting hole and is slidably connected, a mating bolt is provided on both sides of the pressing block, a limiting groove is provided on the inner wall of the mounting groove corresponding to the position of the mating bolt, one end of the mating bolt extends into the limiting groove and is slidably connected, and a cut surface is provided on the side of the pressing block near the hot-press welding head.

[0012] The present invention is further configured such that a reset spring is provided at the bottom of the lower pressure plate, one end of which is connected to the inner wall of the main body, the top end of the lower pressure plate extends into the interior of the connecting cylinder, and a lower pressure rod is fixedly connected to the top end of the lower pressure plate inside the connecting cylinder, one end of which passes through the connecting cylinder and is fixedly connected to the cutter.

[0013] The invention is further configured such that a rocker plate is hinged to the top of the top plate at a position below the pressure rod, and a slot is provided on the top of the hot-press welding head near the rocker plate, with one end of the rocker plate extending into the slot and slidably connected.

[0014] The present invention is further configured such that a plurality of auxiliary sliders are slidably connected inside the second docking groove, and an elastic element is provided on one side of the auxiliary slider, one end of which is connected to the inner wall of the second docking groove. A pushing component is provided inside the main body near the feeding port, and a locking block is fixedly installed at the output end of the pushing component.

[0015] The beneficial effects of the infusion bag waste removal device of the present invention are as follows:

[0016] 1. This device integrates welding and waste edge removal into a single station through the coordinated operation of the upper mold mechanism's downward pressure drive rod, the hot-press welding head, the cutter, and the lower mold mechanism. The downward pressure drive rod first drives the entire upper mold mechanism to fall, allowing the hot-press welding head to contact the film and complete the welding. After welding, the downward pressure drive rod continues to fall, transmitting the downward pressure to the lower pressure plate via a spring. The lower pressure plate then drives the downward pressure rod to simultaneously push the cutter closer to the edge of the film welding point, ultimately completing the waste edge cutting. The entire process eliminates the need for conveyor belts or robotic arms to transport semi-finished products, avoiding positioning offsets caused by the flexible stretching and transmission vibration of the film. This effectively reduces waste edge residue and cutting burrs, lowers the risk of cutting the welded edges of the bag, and significantly improves the product qualification rate.

[0017] 2. After welding, when the pressure plate moves under the force of the downward driving rod, its bottom pressure surface presses against the mating surface of the mating block in the edge pressing assembly, pushing the mating block to move outwards from the main body, thereby causing the pressure plate to move synchronously. Simultaneously, the downward rod engages with the rocker plate and causes it to flip, lifting the hot-press welding head away from the film through the locking mechanism. The pressure plate then moves synchronously to the contact point between the hot-press welding head and the film, separating the hot-press welding head from the film using the cutting surface, and firmly pressing down on the film welding point. This linkage design can immediately fix the film shape after welding via the pressure plate, effectively suppressing the film's rebound due to temperature changes and elasticity, avoiding precision deviations caused by long intervals between welding and cutting, and further ensuring the flatness of the cut.

[0018] 3. As the cutter approaches the welding point, the downward drive rod, via the extension plate, drives the push rod downward, causing the second locking block at the bottom of the push rod to move to the position of the wedge-shaped surface of the cutter. As the cutter continues to fall, the second locking block moves synchronously with the wedge-shaped surface and catches the cut waste edge. After the cutter falls to its limit position, the downward drive rod continues to fall and compresses the first spring. At this time, due to the guiding effect of the third connecting bolt and the connecting groove of the connecting plate, the push rod independently drives the second locking block to move through the feed port to below the main body, aligning the interface of the second locking block with the locking block of the push component in the lower mold mechanism. Subsequently, the push component pushes the locking block through the interface, pulling out and cleaning the waste edge in the second locking block. This process, through the close linkage of the second locking block, the push rod, the push component, and the first locking block, achieves precise clamping, directional conveying, and thorough cleaning of the waste edge, preventing the waste edge from sticking to the bag body due to molten residue, preventing the waste edge from accumulating and clogging the mold or conveyor line, reducing the frequency of downtime for cleaning, and reducing the medical safety risk of waste edge contaminating the bag. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the accompanying drawings.

[0020] Please provide a detailed explanation.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Figure 1 This is a three-dimensional structural diagram of an infusion bag waste edge removal device according to the present invention;

[0023] Figure 2 This is a side view of an infusion bag waste removal device according to the present invention;

[0024] Figure 3 This is a partial diagram of the lower mold mechanism of the infusion bag waste edge removal device of the present invention;

[0025] Figure 4 This is an enlarged view of the upper mold mechanism of the infusion bag waste edge removal device of the present invention;

[0026] Figure 5 This is a cross-sectional view of the upper mold mechanism assembly of the waste edge removal device for infusion bags according to the present invention;

[0027] Figure 6 This is an exploded top view of the pressing module of an infusion bag waste edge removal device according to the present invention;

[0028] Figure 7 This is an exploded bottom view of the pressing module of an infusion bag waste edge removal device according to the present invention;

[0029] Figure 8 This is a partial diagram of the pressing assembly of the waste edge removal device for infusion bags according to the present invention;

[0030] Figure 9 This invention Figure 5 A magnified view is shown in section A.

[0031] The diagram is labeled as follows: 1. Lower mold mechanism; 11. Main body 1; 12. Pushing component; 13. Locking block 1; 14. Docking groove 2; 15. Material outlet; 16. Auxiliary slider; 17. Elastic element 1; 2. Upper mold mechanism; 21. Pressing module; 211. Main body 2; 2111. Mounting groove; 2112. Limiting groove; 212. Pressing edge component; 2121. Docking block; 2122. Docking surface; 2123. Elastic element 2; 2124. Limiting hole; 2125. Pressing block; 2126. Cut surface; 2127. Connecting 2128. Connecting bolt; 213. Return spring; 214. Lower pressure plate; 2141. Pressure surface; 2142. Lower pressure rod; 215. Top plate; 2151. Rocker; 216. Connecting cylinder; 22. Hot press welding head; 221. Bayonet; 23. Cutter; 231. Connecting plate; 232. Connecting groove one; 233. Wedge surface one; 24. Lower pressure drive rod; 241. Spring one; 242. Extension plate; 243. Push rod; 2431. Connecting bolt three; 2432. Locking block two; 2433. Connecting interface. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," 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 simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two elements or the interaction between two elements.

[0034] Please see Figure 1 - Figure 9A waste edge removal device for infusion bags includes a lower mold mechanism 1. The lower mold mechanism 1 includes a main body 11. A docking groove 2 14 is opened on the top of the main body 11. A discharge port 15 is opened through the top of the main body 11 near the docking groove 2 14. A plurality of auxiliary sliders 16 are slidably connected inside the docking groove 2 14. An elastic element 17 is provided on one side of the auxiliary slider 16, with one end connected to the inner wall of the docking groove 2 14. A pushing component 12 is provided inside the main body 11 near the discharge port 15. A locking block 13 is fixedly installed at the output end of the pushing component 12.

[0035] Upper mold mechanism 2 is located above lower mold mechanism 1. Upper mold mechanism 2 includes lower pressing module 21. A hot pressing welding head 22 is sleeved on the outside of the lower pressing module 21. A cutter 23 is slidably connected to the outside of the hot pressing welding head 22. A butt plate 231 is provided at one end of the cutter 23 above the material outlet 15. A wedge-shaped surface 233 is opened on the outer wall of the cutter 23 between the butt plates 231.

[0036] The pressing module 21 includes a main body 211 that is slidably connected to the inner wall of the hot pressing head 22. The main body 211 has several mounting grooves 2111 inside. A pressing component 212 is provided inside the mounting grooves 2111. A pressing plate 214 is slidably installed inside the main body 211 above the pressing component 212. A top plate 215 is fixedly installed on the top of the main body 211. A connecting cylinder 216 is fixedly connected to the top of the top plate 215. A pressing drive rod 24 is slidably connected inside the connecting cylinder 216.

[0037] By adopting the above technical solution, the auxiliary slider 16 inside the docking groove 2 14 is elastically supported by the elastic element 17, preventing the waste edge from bending and causing incomplete cutting when the cutter 23 presses down. The pushing component 12 automatically peels off the waste edge by cooperating with the interface 2433 of the locking block 1 13 and the locking block 2 2432, eliminating the need for manual intervention. The hot-press welding head 22 is fitted with the pressing module 21, and the cutter 23 slides against its outer wall for synchronous welding and cutting, eliminating step-by-step positioning errors. The docking block 2121 slides against the pressing block 2125 by the connecting bolt 2127, and the limiting groove 2112 guides its trajectory to ensure that the pressure edge matches the welding contour. The pressing drive rod 24 drives the push rod 243 through the extension plate 242, causing the locking block 2432 to slide along the wedge surface 1 233 and grab the waste edge. The docking groove 1 232 and the docking bolt 3 2431 slide together to ensure the horizontal accuracy of the push rod 243 pressing down and prevent the locking block 2432 from being misaligned with the waste edge.

[0038] An extension plate 242 is provided on the side of the downward drive rod 24 near the docking plate 231. One end of the extension plate 242 extends through the connecting cylinder 216 to a position above the docking plate 231. A push rod 243 is slidably connected to the bottom of the end of the extension plate 242 above the docking plate 231. The bottom end of the push rod 243 extends between the docking plates 231. A locking block 2432 is provided at the bottom end of the push rod 243 near the wedge-shaped surface 233. A mating interface 2433 is provided on one side of the locking block 2432. A spring 241 is provided at the bottom of the downward drive rod 24, with one end connected to the downward pressure plate 214. A docking bolt 2431 is symmetrically provided on both sides of the push rod 243. A docking groove 232 is provided on the inner wall of the docking plate 231 corresponding to the position of the docking bolt 2431. One end of the docking bolt 2431 extends to the inner wall of the docking groove 232 and is slidably connected.

[0039] By adopting the above technical solution, the extension plate 242 penetrates through the connecting cylinder 216 to the top of the docking plate 231, forming a rigid transmission arm, and also provides a sliding track for the push rod 243, ensuring a compact structure. The push rod 243 slides against the bottom of the extension plate 242 and can move vertically independently. Its bottom locking block 2432 cooperates with the wedge surface 233 to clamp the waste edge. The docking bolt 2431 slides into the docking groove 232 to ensure the horizontal accuracy of the push rod 243 when it moves vertically and prevents deflection and misalignment. The spring 241 connects the downward driving rod 24 and the downward pressure plate 214, initially storing energy. After the cutter 23 touches the top plate 215, the spring force is released, and the waste edge peeling is flexible and controllable. The docking interface 2433 of the locking block 2432 cooperates with the locking block 13 to form a waste edge transfer channel. When the push rod 243 presses down, it first clamps the waste edge, and then, guided by the docking bolt 2431, it disengages from the wedge surface 233 and pushes the waste edge to the discharge port 15.

[0040] The pressing assembly 212 includes a mating block 2121 that is slidably connected to the inner wall of the mounting groove 2111. The mating block 2121 has a mating surface 2122 on the side near the lower pressing plate 214. The bottom of the lower pressing plate 214 has a pressing surface 2141 at the position corresponding to the mating surface 2122. The top of the mating block 2121 is provided with an elastic element 2123, one end of which is connected to the inner wall of the mounting groove 2111. A lower pressure block 2125 is slidably connected to the bottom of the mating block 2121. A connecting bolt 2127 is provided at the connection between the top of the lower pressure block 2125 and the mating block 2121. A limiting hole 2124 is provided at the bottom of the mating block 2121 corresponding to the position of the connecting bolt 2127. One end of the connecting bolt 2127 extends into the limiting hole 2124 and is slidably connected. A mating bolt 2128 is provided on both sides of the lower pressure block 2125. A limiting groove 2112 is provided on the inner wall of the mounting groove 2111 corresponding to the position of the mating bolt 2128. One end of the mating bolt 2128 extends into the limiting groove 2112 and is slidably connected. A cut surface 2126 is provided on the side of the lower pressure block 2125 near the hot press welding head 22.

[0041] By adopting the above technical solution, the mating block 2121 contacts the pressing surface 2141 of the lower pressure plate 214 via the mating surface 2122. When the lower pressure plate 214 presses down, it slides horizontally along the mounting groove 2111, converting the vertical pressure into a horizontal thrust. The elastic element 2123 provides the restoring force. The mating block 2121 slides onto the lower pressure block 2125 via the connecting bolt 2127. The connecting bolt 2127 moves within the limiting hole 2124, limiting its stroke. The first mating bolt 2128 slides into the limiting groove 2112, ensuring that the lower pressure block 2125 moves along the preset trajectory to prevent jamming. The cut surface 2126 of the lower pressure block 2125 is inserted into the hot-press welding head 22 to separate it from the film and prevent them from sticking together. The limiting groove 2112 and the first mating bolt 2128 maintain a contact position in the mating direction.

[0042] A return spring 213 is provided at the bottom of the lower pressure plate 214, with one end connected to the inner wall of the main body 211. The top of the lower pressure plate 214 extends into the interior of the connecting cylinder 216. A lower pressure rod 2142 is fixedly connected to the top of the lower pressure plate 214 inside the connecting cylinder 216. One end of the lower pressure rod 2142 passes through the connecting cylinder 216 and is fixedly connected to the cutter 23. A rocker arm 2151 is hinged to the top of the top plate 215 below the lower pressure rod 2142. A slot 221 is provided on the top of the hot-press welding head 22 near the rocker arm 2151. One end of the rocker arm 2151 extends into the slot 221 and is slidably connected.

[0043] By adopting the above technical solution, the pressure rod 2142 is fixed to the top of the pressure plate 214 and passes through the connecting cylinder 216, transmitting the vertical movement of the pressure plate 214 to the cutter 23. The rigid connection ensures that the two move synchronously. The rocker arm 2151 is hinged to the top of the top plate 215, with one end touching the locking slot 221 of the pressure rod 2142 and the other end extending to the hot-press welding head 22, lifting the hot-press welding head 22 by lever principle. The locking slot 221 and the rocker arm 2151 slide to ensure precise lifting of the hot-press welding head 22 and prevent deviation. The connecting cylinder 216 not only fixes the pressure drive rod 24, but also provides a linear motion track for the pressure rod 2142, ensuring that the downward trajectory of the cutter 23 is vertically stable.

[0044] Working principle and usage process of this invention:

[0045] In normal conditions, because the hot-press welding head 22 is fitted onto the lower pressing module 21, its bottom is flush with the bottom of the lower pressing module 21. The lower pressing plate 214 is normally lifted by the return spring 213. Because the cutter 23 is connected to the lower pressing plate 214 through the lower pressing rod 2142, the bottom of the cutter 23 is higher than the hot-press welding head 22. At the same time, the second locking block 2432 at the bottom of the push rod 243 is higher than the first wedge surface 233, leaving compression space for the first spring 241 to fall. The strength of the first spring 241 is greater than that of the return spring 213. In the initial state, the bottom of the lower pressing block 2125 is higher than the bottom of the second main body 211. The auxiliary slider 16 in the second docking groove 14 is located below the cutter 23 near the blade edge. Its main function is to support the waste edge and prevent the waste edge from being squeezed into the second docking groove 14 by the cutter 23, thus preventing the waste edge from being cut off.

[0046] In use, the film used to produce infusion bags is transported between the upper mold mechanism 2 and the lower mold mechanism 1. The upper mold mechanism 2 is driven to fall by the downward driving rod 24. The film falls to the main body 211 and the hot pressing welding head 22 presses on the surface of the film. Then the downward driving rod 24 stops falling, and the film is then welded by the hot pressing welding head 22.

[0047] When welding is completed, the pressure drive rod 24 continues to fall. Since the main body 211 cannot fall, the pressure drive rod 24 transmits the downward pressure to the pressure plate 214 through the spring 241. The pressure surface 2141 of the pressure plate 214 presses the mating surface 2122 of the mating block 2121, thereby pushing the mating block 2121 to move. The movement of the mating block 2121 simultaneously drives the pressure block 2125 to move outward from the main body 211. As the pressure block 2125 moves, it begins to extend downward due to the guiding effect of the limiting groove 2112. When the pressure block 2125 moves close to the hot press welding head 22, the pressure rod 2142 will be in contact with the top of the rocker plate 2151, and the cutter 23 will be pushed by the pressure rod 2142 to a position close to the edge of the film welding point.

[0048] As pressure continues to fall, the rocker arm 2151 flips, lifting the hot-press welding head 22 away from the membrane via the bayonet 221. Simultaneously, the pressing block 2125 moves to the contact point between the hot-press welding head 22 and the membrane, separating the hot-press welding head 22 from the membrane via the cutting surface 2126 and pressing down on the membrane welding point. Simultaneously, the cutter 23 falls to remove the waste edge at the welding point. After removal, the cutter 23 continues to move into the second docking groove 14, using its own thickness to completely separate the waste edge from the infusion bag.

[0049] As the cutter 23 approaches the welding point, the downward drive rod 24 presses down the push rod 243 via the extension plate 242, causing the locking block 2432 at the bottom of the push rod 243 to move to the position of the wedge surface 233. As the cutter 23 continues to fall, the locking block 2432 falls synchronously with the wedge surface 233, thus locking the cut waste edge inside the locking block 2432. The cutter 23 stops falling when the downward drive rod 2142 presses against the top of the top plate 215. At this time, the downward drive rod 24 continues to fall, which will compress the spring 241. At this time, the push rod 243 falls alone, so the docking bolt 2431 on its side wall will be affected by the docking groove 232 on the docking plate 231, which will cause the locking block 2432 to disengage from the wedge surface 233 and push the locking block 2432 through the discharge port 15 to move the waste material to the bottom of the main body 11, so that the mating interface 2433 on the locking block 2432 is aligned with the locking block 13. Then the pushing component 12 will push the locking block 13 through the mating interface 2433 and pull out and clean the waste edge in the locking block 2432.

[0050] In summary, compared with the prior art, the embodiments of the present invention have the following advantages:

[0051] Advantage 1: The upper mold mechanism 2 directly integrates the hot-press welding head 22 and the cutter 23, allowing welding and cutting processes to be completed at the same station without the need for semi-finished product transfer. After welding, the pressing edge assembly 212 (butting block 2121, pressing block 2125) of the lower pressing module 21 cooperates with the pressing surface 2141 of the lower pressing plate 214 and the butting surface 2122 to tightly press the film welding point. At the same time, the auxiliary slider 16 of the lower mold mechanism 1 supports the waste edge, preventing the film from being stretched, deformed, or bent, reducing positioning offset from the source, and lowering the probability of waste edge residue, burrs, and cuts to the bag.

[0052] Advantage 2: After welding, as the lower pressure plate 214 moves the cutter 23 downwards, the rocker arm 2151 lifts the thermoforming head 22 away from the film through the clamp 221 of the thermoforming head 22. Simultaneously, the lower pressure block 2125 separates the thermoforming head 22 from the film through the cutting surface 2126 and continues to press the welding point, after which the cutter 23 completes the cutting. The entire process significantly shortens the time interval between welding and cutting, effectively suppresses the rebound of the film caused by temperature changes and elasticity, and further ensures cutting accuracy.

[0053] Thirdly, during cutting, the downward drive rod 24 moves the push rod 243 downward through the extension plate 242. The second locking block 2432 engages with the wedge-shaped surface 233 of the cutter 23, firmly holding the waste edge. After the cutter 23 is in position, the push rod 243 moves down along the docking groove 232 to the discharge port 15, pushing the component 12 to drive the first locking block 13 through the docking interface 2433, directly pulling the waste edge out of the second locking block 2432 and cleaning it. This linkage structure enables the waste edge to actively detach, avoiding blockage of the conveyor line due to adhesion, and reducing the medical safety risk of waste edge contaminating the bag.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for removing the waste edge of an infusion bag, characterized in that, Include: Lower die mechanism (1), the lower die mechanism (1) includes main body one (11), the main body one (11) top is provided with butt joint groove two (14), the main body one (11) top is close to the position of butt joint groove two (14) and is provided with the blanking opening (15) through; Upper die mechanism (2), the upper die mechanism (2) is arranged at the position above lower die mechanism (1), and the upper die mechanism (2) includes lower pressure die group (21), the lower pressure die group (21) is externally sleeved with hot pressure welding head (22), the hot pressure welding head (22) is externally connected with cutter (23) slidingly, the cutter (23) one end is located at the position above blanking opening (15) and is provided with butt joint plate (231), the cutter (23) is located at the outer wall between butt joint plate (231) and is provided with wedge surface one (233); The lower pressure die group (21) includes main body two (211) that is connected with the inner wall of hot pressure welding head (22) slidingly, the main body two (211) is internally provided with a plurality of installation grooves (2111), the installation groove (2111) is provided with edge compression assembly (212) inside, the main body two (211) is internally connected with lower pressing plate (214) slidingly at the position above edge compression assembly (212), the main body two (211) top is fixedly installed with top plate (215), the top plate (215) top is fixedly connected with connecting barrel (216), the connecting barrel (216) is internally connected with lower pressing drive rod (24) slidingly.

2. The IV bag scrap removal device of claim 1, wherein: The lower pressing drive rod (24) is provided with extension plate (242) on the side close to butt joint plate (231), one end of the extension plate (242) extends through connecting barrel (216) and extends to the position above butt joint plate (231), the extension plate (242) is connected with push rod (243) slidingly at the bottom of one end above butt joint plate (231), the push rod (243) extends to the bottom between butt joint plate (231), the push rod (243) is provided with clamping block two (2432) at the position close to wedge surface one (233) at the bottom, the clamping block two (2432) is provided with butt joint (2433) on the side.

3. The IV bag scrap removal device of claim 2, wherein: The lower pressing drive rod (24) is provided with spring one (241) at one end connected with lower pressing plate (214) at the bottom, the push rod (243) is provided with butt joint bolt three (2431) on both sides, the butt joint plate (231) is provided with butt joint groove one (232) on the inner wall of the position corresponding to butt joint bolt three (2431), and the butt joint bolt three (2431) extends to the inner wall of butt joint groove one (232) and is connected slidingly at one end.

4. The IV bag scrap removal device of claim 1, wherein: The edge compression assembly (212) includes butt joint block (2121) that is connected with the inner wall of installation groove (2111) slidingly, the butt joint block (2121) is provided with butt joint surface (2122) on the side close to lower pressing plate (214), the lower pressing plate (214) is provided with pressing surface (2141) at the bottom of the position corresponding to butt joint surface (2122), and the butt joint block (2121) is provided with elastic element two (2123) at one end connected with the inner wall of installation groove (2111) at the top.

5. The IV bag scrap removal device of claim 4, wherein: The bottom of the docking block (2121) is slidably connected with a pressing block (2125), the top of the pressing block (2125) is provided with a connecting bolt (2127) at the connecting position with the docking block (2121), the bottom of the docking block (2121) is provided with a limiting hole (2124) corresponding to the position of the connecting bolt (2127), one end of the connecting bolt (2127) extends into the limiting hole (2124) and is slidably connected, the two sides of the pressing block (2125) are provided with a docking bolt (2128), the inner wall of the mounting groove (2111) is provided with a limiting groove (2112) corresponding to the position of the docking bolt (2128), one end of the docking bolt (2128) extends into the limiting groove (2112) and is slidably connected, and the side of the pressing block (2125) close to the hot pressing welding head (22) is provided with a cutting surface (2126).

6. The IV bag scrap removal device of claim 1, wherein: The bottom of the pressing plate (214) is provided with a reset spring (213) connected with the inner wall of the main body two (211) at one end, the top end of the pressing plate (214) extends into the connecting barrel (216), the top end of the pressing plate (214) fixedly connected with a pressing rod (2142) in the connecting barrel (216), and one end of the pressing rod (2142) penetrates through the connecting barrel (216) and is fixedly connected with the cutter (23).

7. The IV bag scrap removal device of claim 6, wherein: The top of the top plate (215) is hingedly connected with a rocker (2151) below the pressing rod (2142), the top of the hot pressing welding head (22) is provided with a bayonet (221) close to the rocker (2151), and one end of the rocker (2151) extends into the bayonet (221) and is slidably connected.

8. The IV bag scrap removal device of claim 1, wherein: The docking groove two (14) is slidably connected with a plurality of auxiliary sliding blocks (16), one side of the auxiliary sliding block (16) is provided with an elastic element one (17) connected with the inner wall of the docking groove two (14) at one end, the inside of the main body one (11) is provided with a pushing assembly (12) close to the discharging port (15), and the output end of the pushing assembly (12) is fixedly installed with a clamping block one (13).

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