A plastic shaping mechanism for paper plastic bags

Abstract

This utility model provides a shaping mechanism for a paper-plastic bag, belonging to the field of medical assembly. It includes a base plate and a sliding plate that can slide on the base plate. A bag-supporting assembly is mounted on the sliding plate, and a bag-clamping assembly is installed on the base plate. The bag-supporting assembly includes a bag-supporting support platform, a second driving component, a bag-supporting plate, a bag-supporting driving component, a first supporting plate, and a second supporting plate. The first and second supporting plates are controlled by the bag-supporting driving component to move laterally to open and close, and the second driving component controls the forward and backward movement of the first and second supporting plates. The bag-clamping assembly includes a first clamping finger and a second clamping finger, which are located on the outside of the first and second supporting plates, respectively. After the paper-plastic bag is flattened by the first and second supporting plates, the first and second clamping fingers clamp the two ends of the paper-plastic bag. This utility model simultaneously designs a bag-supporting assembly and a bag-clamping assembly. After the bag-supporting assembly flattens the bag opening, the bag-clamping assembly clamps the corners of the bag. The bag-supporting assembly can be withdrawn from the paper-plastic bag, leaving space for heat sealing.

Description

Technical Field

[0001] This utility model belongs to the field of medical assembly, specifically relating to a shaping mechanism for paper-plastic bags. Background Technology

[0002] Infusion sets are among the most common medical devices in daily life. Medical infusion sets are typically assembled from tubing and various connectors. Pre-assembled medical infusion sets are usually sealed and stored in a paper-plastic bag, which is lightweight, easy to tear, and commonly used in the medical field.

[0003] After the paper-plastic bag is filled, the bag opening needs to be flattened before heat sealing. In existing technology, the flattening structure of paper-plastic bags, such as the bag-making and opening device disclosed in Chinese patent application number 2017108676834, includes a bag-opening device comprising a bag-opening body, a first expansion member, and a second expansion member. The first and second expansion members are slidably mounted on the bag-opening body, with the first expansion member moving away from the second expansion member to open the packaging bag. This patent discloses heat sealing the bag body first and then opening the bag opening, without addressing the heat sealing of the side after the bag opening is opened. Furthermore, the bag-opening device in this patent extends quite deep into the bag. If the first and second expansion members are kept open inside the bag for continued heat sealing, it would result in a significant waste of space at the bottom of the bag, requiring improvement. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a shaping mechanism for paper-plastic bags before heat sealing the bag opening.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution.

[0006] A paper-plastic bag shaping mechanism includes a base plate and a sliding plate that can slide on the base plate. A bag-supporting assembly is mounted on the sliding plate, and a bag-clamping assembly is mounted on the base plate. The bag-supporting assembly includes a bag-supporting support platform, a second driving component, a bag-supporting plate, a bag-supporting driving component, a first supporting plate, and a second supporting plate. The first and second supporting plates are controlled by the bag-supporting driving component to move laterally to open and close, and the second driving component controls the forward and backward movement of the first and second supporting plates. The bag-clamping assembly includes a first clamping finger and a second clamping finger, which are located on the outside of the first and second supporting plates, respectively. After the paper-plastic bag is flattened by the first and second supporting plates, the first and second clamping fingers clamp the two ends of the paper-plastic bag.

[0007] Furthermore, the bag support platform is installed on the slide plate, the second drive component is installed on the platform of the bag support platform, the bag support plate is installed on the movable end of the second drive component, the second drive component can drive the bag support plate to move back and forth, the bag support drive component is installed at the front end of the bag support plate, the bag support drive component has two openable movable ends, which are respectively connected to the first support plate and the second support plate; the first support plate and the second support plate have the same shape and are installed symmetrically.

[0008] Furthermore, the first support plate includes a connecting plate and a flat support plate. The connecting plate is fixed in a vertical state to a certain movable end of the support bag drive component. The rear end of the flat support plate is fixedly connected to the bottom of the connecting plate. The flat support plate is L-shaped and has an outwardly expanding portion. The flat support plate gradually becomes thinner from back to front, and the outwardly expanding portion gradually becomes thinner from inside to outside.

[0009] Furthermore, the outer end of the extended portion has anti-cutting marks.

[0010] Furthermore, the bag clamping assembly also includes a bag clamping base plate, a bag clamping support frame, and a bag clamping drive component. The bag clamping base plate is mounted on the base plate, the bag clamping support frame is fixed to the front side of the bag clamping base plate, and the bag clamping drive component is mounted on the front side of the bag clamping support frame. The bag clamping drive component has two openable and closable movable ends, which are respectively connected to a first clamping finger and a second clamping finger. The grippers on the first clamping finger and the second clamping finger can move up and down in opposite directions to clamp the paper-plastic bag.

[0011] Furthermore, the bag clamp support frame is located above the slide plate and below the bag support plate.

[0012] Furthermore, a third driving component can be provided at the connection between the first or second support plate and the movable end of the bag-supporting drive component. That is, the third driving component is installed on a certain movable end of the bag-supporting drive component, and the first or second support plate is connected to the movable end of the third driving component. The third driving component can drive the first or second support plate to move laterally.

[0013] Furthermore, a fourth driving component can be provided at the connection between the first or second gripping finger and the movable end of the bag clamping drive component. That is, the fourth driving component is installed on a certain movable end of the bag clamping drive component, and the first or second gripping finger is connected to the movable end of the fourth driving component. The fourth driving component can drive the first or second gripping finger to move laterally.

[0014] Compared with existing technologies, this invention incorporates both a bag-supporting component and a bag-clamping component. The bag-supporting component flattens the bag opening, while the bag-clamping component secures the bag corners. The bag-supporting component can then be withdrawn from the paper-plastic bag, creating space for heat sealing. The bag-clamping component's design minimizes the fixed contact area with the paper-plastic bag, ensuring the heat-sealing point is as close as possible to the bottom edge of the bag. This allows for the optimal size selection of the paper-plastic bag used for packaging medical accessories, without compromising the actual internal capacity due to the heat-sealing point being too high, thus saving manufacturing costs. Furthermore, the staggered arrangement of the bag-supporting and bag-clamping components makes the overall structure more compact and efficient. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the structure from another angle in an embodiment of this utility model.

[0017] Figure 3 This is a rear-view three-dimensional structural diagram of an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the outer expansion portion in an embodiment of this utility model.

[0019] In the diagram, 1. Base plate; 2. Slide plate; 3. Slide rail; 4. Drive component one; 5. Bag support assembly; 51. Bag support platform; 52. Drive component two; 53. Bag support plate; 54. Bag support drive component; 55. First support plate; 551. Connecting plate; 552. Flat support plate; 553. Outer expansion part; 554. Anti-cutting strip; 56. Second support plate; 57. Drive component three; 6. Bag clamping assembly; 61. Bag clamping base plate; 62. Bag clamping support frame; 63. Bag clamping drive component; 64. First clamping finger; 65. Second clamping finger; 66. Drive component four. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] This specific embodiment is merely an explanation of the present invention, and the directions indicated are for the convenience of describing the technical content. It is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0022] like Figure 1-4 As shown, this embodiment provides a paper-plastic bag shaping mechanism, including a base plate 1 and a slide plate 2. A slide rail 3 is also laid on the base plate 1. The slide plate 2 is slidably installed on the slide rail 3. The slide plate 2 is driven by a drive component 4 to slide back and forth on the slide rail 3. The drive component 4 is installed on the base plate 1.

[0023] A bag support assembly 5 is mounted on the skateboard 2. The bag support assembly 5 includes a bag support platform 51, a second drive component 52, a bag support plate 53, a bag support drive component 54, a first support plate 55, and a second support plate 56. The bag support platform 51 is mounted on the skateboard 2. The second drive component 52 is mounted on the platform of the bag support platform 51. The bag support plate 53 is mounted on the movable end of the second drive component 52, which can drive the bag support plate 53 to move back and forth. The bag support drive component 54 is mounted on the front end of the bag support plate 53 and has two openable movable ends, which are respectively connected to the first support plate 55 and the second support plate 56. The first support plate 55 and the second support plate 56 have the same shape but are symmetrically installed.

[0024] The first support plate 55 includes a connecting plate 551 and a flat support plate 552. The connecting plate 551 is fixed vertically to a movable end of the bag-supporting drive component 54. The rear end of the flat support plate 552 is fixedly connected to the bottom of the connecting plate 551. The flat support plate 552 is L-shaped and has an outwardly expanding portion 553. The flat support plate 552 gradually thins from back to front, and the expanding portion 553 gradually thins from inside to outside. This facilitates the insertion of the flat support plate 552 into the paper bag and its lateral outward movement for bag-supporting action. The thinner outer edge of the expanding portion 553 also helps to reduce the contact thickness between the outer edge of the expanding portion 553 and the inner edge of the paper-plastic bag. When the bag clamping assembly 6 is located behind the expanding portion 553 and clamps the bag opening, the clamping fingers contact the outer edge of the paper-plastic bag, reducing the possibility of the outer edge of the paper-plastic bag being overlapped and clamped, which can effectively improve the bag clamping and subsequent heat sealing effect. If the outer expansion portion 553 is too thick, after it abuts against the inner edge of the paper-plastic bag, a thicker frame will appear at the opening of the paper bag behind the outer expansion portion 553. When the fingers are clamped on this frame, it is easy to fold and deform, affecting the success rate of heat sealing.

[0025] The outer end of the outward expansion portion 553 has anti-cutting grooves 554, which makes it easier for the outward expansion portion 553 to be pressed tightly and flattened against the inner cavity of the paper-plastic bag, avoiding the paper-plastic bag from being cut open from the inside due to a too smooth cut surface, thus preventing damage to the paper-plastic bag. In addition, the anti-cutting grooves 554 can also play a role in preventing slippage of the paper-plastic bag in the front and back position before it is clamped by the fingers, which would affect the success rate of clamping and heat sealing.

[0026] A third driving component 57 may also be provided at the connection between the first support plate 55 or the second support plate 56 and the movable end of the bag-supporting driving component 54. That is, the third driving component 57 is installed on a certain movable end of the bag-supporting driving component 54. The first support plate 55 or the second support plate 56 is connected to the movable end of the third driving component 57. The third driving component 57 can drive the first support plate 55 or the second support plate 56 to move laterally. The provision of the third driving component 57 can extend the lateral movement distance of the first support plate 55 or the second support plate 56, so that this paper-plastic bag shaping mechanism can be applied to paper-plastic bags of different specifications.

[0027] The bag-supporting assembly 5 includes at least one set of bag-supporting drive components 54 + a first support plate 55 + a second support plate 56, which can support simultaneous operation at multiple workstations. The figure shows a combination including two sets of bag-supporting drive components 54 + a first support plate 55 + a second support plate 56.

[0028] In this embodiment, the base plate 1 is also equipped with a bag clamping assembly 6. The bag clamping assembly 6 includes a bag clamping base plate 61, a bag clamping support frame 62, a bag clamping drive component 63, a first clamping finger 64, and a second clamping finger 65. The bag clamping base plate 61 is mounted on the base plate 1, the bag clamping support frame 62 is fixed to the front side of the bag clamping base plate 61, and the bag clamping drive component 63 is mounted on the front side of the bag clamping support frame 62. The bag clamping drive component 63 has two openable and closable movable ends, which are respectively connected to the first clamping finger 64 and the second clamping finger 65. The grippers on the first clamping finger 64 and the second clamping finger 65 can move up and down towards each other to clamp the paper-plastic bag.

[0029] A fourth driving component 66 may also be provided at the connection point between the first clamping finger 64 or the second clamping finger 65 and the movable end of the bag clamping drive component 63. That is, the fourth driving component 66 is mounted on a movable end of the bag clamping drive component 63, and the first clamping finger 64 or the second clamping finger 65 is connected to the movable end of the fourth driving component 66. The fourth driving component 66 can drive the first clamping finger 64 or the second clamping finger 65 to move laterally. The fourth driving component 66 extends the lateral movement length of the first clamping finger 64 or the second clamping finger 65, making this paper-plastic bag shaping mechanism applicable to paper-plastic bags of different specifications. The third driving component 57 and the fourth driving component 66 are used together.

[0030] The bag clamping assembly 6 is relatively fixed in position, while the bag supporting assembly 5 can extend and retract forward and backward.

[0031] The bag clamping support frame 62 is located above the slide plate 2 and below the bag support plate 53. The first clamping finger 64 is located outside the first support plate 55, and the second clamping finger 65 is located outside the second support plate 56. This arrangement makes reasonable use of space, makes the overall structure more compact, and can complete the bag support and clamping actions at the same time.

[0032] In this embodiment, the flat support plate 552 is L-shaped. During the process of the outward expansion portion 553 abutting against the inner edge of the paper-plastic bag, there is an empty space behind the outward expansion portion 553. The lateral movement of the outward expansion portion 553 will not touch the first clamping finger 64 or the second clamping finger 65 of the bag clamping assembly 6. The clamping fingers are located behind the outward expansion portion 553, which makes the overall structure more compact and efficient. The bag clamping assembly 6 is set with the minimum fixed contact area with the paper-plastic bag, so that the heat sealing point of the paper-plastic bag opening is as close as possible to the bottom edge of the paper-plastic bag. The size of the paper-plastic bag used for packaging medical accessories can be reasonably selected without affecting the actual internal size of the paper-plastic bag because the heat sealing point is too high, thereby saving manufacturing costs.

[0033] This device is used for the pre-heat sealing process of paper-plastic bags. After one end of the paper-plastic bag is sucked open from the top and bottom, an opening is exposed, and then medical accessories, such as infusion sets, are inserted. The paper-plastic bag with the opening then needs to be heat-sealed. The bag-supporting assembly 5 first extends into the opening of the paper-plastic bag. Then, the first support plate 55 and the second support plate 56 move to both ends to flatten the opening of the paper-plastic bag. The first clamping finger 64 and the second clamping finger 65 respectively clamp the corners of the paper-plastic bag. Then, the first support plate 55 and the second support plate 56 retract inward to make room. Finally, the heat-sealing machine heat-seales the flattened opening of the paper-plastic bag. The heat-sealing machine is a commonly used piece of equipment and is not shown in the figure.

[0034] The specific workflow of this paper-plastic bag shaping mechanism is as follows: The open paper-plastic bag arrives at the workstation. Driver 4 drives the slide plate 2 forward, and driver 52 drives the bag-supporting plate 53 to continue moving forward. The first support plate 55 and the second support plate 56 are inserted into the paper-plastic bag. The bag-supporting drive 54 controls the first support plate 55 and the second support plate 56 to move to both sides until they are pressed against the inner edge of the bag. The first clamping finger 64 and the second clamping finger 65 clamp the bottom ends of the flattened paper-plastic bag. The bag-supporting drive 54 controls the first support plate 55 and the second support plate 56 to move inward and retract. Driver 4 and driver 52 drive the first support plate 55 and the second support plate 56 to retreat out of the thermoforming space, completing the shaping of the paper-plastic bag. After the paper-plastic bag opening is heat-sealed, the first clamping finger 64 and the second clamping finger 65 release, and the sealed paper-plastic bag is removed, awaiting the next open paper-plastic bag to repeat the above process.

[0035] It should be noted that for large-sized paper-plastic bags, the bag clamping drive 63 can drive the first clamping finger 64 and the second clamping finger 65 to move to both sides respectively, so that the first clamping finger 64 and the second clamping finger 65 form a larger gap to accommodate the large-sized paper-plastic bag; while for even larger-sized paper-plastic bags, the third drive 57 and the fourth drive 66 cooperate to further expand the lateral movement distance of the first support plate 55 and the second support plate 56, and the first clamping finger 64 and the second clamping finger 65 to accommodate even larger-sized paper-plastic bags. The second drive 52 controls the movement distance of the first support plate 55 and the second support plate 56 according to the size of the paper-plastic bag.

Claims

1. A shaping mechanism for paper-plastic bags, characterized in that, The system includes a base plate (1) and a sliding plate (2) that can slide on the base plate (1). A bag support assembly (5) is mounted on the sliding plate (2), and a bag clamping assembly (6) is mounted on the base plate (1). The bag support assembly (5) includes a bag support platform (51), a second drive unit (52), a bag support plate (53), a bag support drive unit (54), a first support plate (55), and a second support plate (56). The first support plate (55) and the second support plate (56) are controlled to move laterally by the bag support drive unit (54). During the opening and closing process, the second drive component (52) controls the forward and backward movement of the first support plate (55) and the second support plate (56); the bag clamping assembly (6) includes a first clamping finger (64) and a second clamping finger (65), which are located on the outside of the first support plate (55) and the second support plate (56), respectively. After the paper-plastic bag is flattened by the first support plate (55) and the second support plate (56), the first clamping finger (64) and the second clamping finger (65) clamp the two ends of the paper-plastic bag.

2. The shaping mechanism for paper-plastic bags as described in claim 1, characterized in that, The bag support platform (51) is installed on the slide plate (2). The second drive component (52) is installed on the platform of the bag support platform (51). The bag support plate (53) is installed on the movable end of the second drive component (52). The second drive component (52) can drive the bag support plate (53) to move back and forth. The bag support drive component (54) is installed at the front end of the bag support plate (53). The bag support drive component (54) has two movable ends that can be opened and closed, which are respectively connected to the first support plate (55) and the second support plate (56). The first support plate (55) and the second support plate (56) have the same shape and are installed symmetrically.

3. The shaping mechanism for paper-plastic bags as described in claim 2, characterized in that, The first support plate (55) includes a connecting plate (551) and a flat support plate (552). The connecting plate (551) is fixed to a certain movable end of the support bag drive (54) in a vertical state. The rear end of the flat support plate (552) is fixedly connected to the bottom of the connecting plate (551). The flat support plate (552) is L-shaped and has an outwardly expanding portion (553). The flat support plate (552) gradually becomes thinner from back to front, and the outwardly expanding portion (553) gradually becomes thinner from inside to outside.

4. The shaping mechanism for paper-plastic bags as described in claim 3, characterized in that, The outer end of the extended portion (553) has anti-cutting grooves (554).

5. The shaping mechanism for paper-plastic bags as described in claim 2, characterized in that, The bag clamping assembly (6) also includes a bag clamping base plate (61), a bag clamping support frame (62), and a bag clamping drive component (63). The bag clamping base plate (61) is mounted on the base plate (1), the bag clamping support frame (62) is fixed to the front side of the bag clamping base plate (61), and the bag clamping drive component (63) is mounted on the front side of the bag clamping support frame (62). The bag clamping drive component (63) has two openable and closable movable ends, which are respectively connected to a first clamping finger (64) and a second clamping finger (65). The grippers on the first clamping finger (64) and the second clamping finger (65) can move up and down in opposite directions to clamp the paper-plastic bag.

6. The shaping mechanism for paper-plastic bags as described in claim 5, characterized in that, The bag support frame (62) is located above the slide plate (2) and below the bag support plate (53).

7. The shaping mechanism for paper-plastic bags as described in claim 1, characterized in that, A third driving component (57) may also be provided at the connection between the first support plate (55) or the second support plate (56) and the movable end of the bag-supporting drive component (54). That is, the third driving component (57) is installed on a certain movable end of the bag-supporting drive component (54). The first support plate (55) or the second support plate (56) is connected to the movable end of the third driving component (57). The third driving component (57) can drive the first support plate (55) or the second support plate (56) to move laterally.

8. The shaping mechanism for paper-plastic bags as described in claim 5, characterized in that, A fourth driving component (66) may also be provided at the connection between the first gripper (64) or the second gripper (65) and the movable end of the bag clamping drive (63). That is, the fourth driving component (66) is installed on a certain movable end of the bag clamping drive (63), and the first gripper (64) or the second gripper (65) is connected to the movable end of the fourth driving component (66). The fourth driving component (66) can drive the first gripper (64) or the second gripper (65) to move laterally.

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