A cooling device for plastic film bag production

Abstract

The utility model discloses a cooling device for plastic film plastic bag production relates to plastic film plastic bag processing technical field, specifically includes the cabinet body, and the top of cabinet body is provided with the square hole of through, and the square hole top is equipped with the lap joint board, the center of lap joint board is to the concave downwards, and the center bottom of lap joint board is equipped with the first through -hole, and the outer periphery bottom of lap joint board is installed with the support rod, and the bottom of support rod is lower than the center bottom of lap joint board, and the bottom of support rod and the top of lap joint board located its bottom contact, the first fixed link and second fixed link are installed on the cabinet body inner wall, and the first fixed link is located below second fixed link, and the outer circumference of second fixed link is installed rotatable limit block, and the one end top of limit block and the outer periphery bottom of lap joint board abut, and the other end bottom of limit block is installed with spring, and one end of spring is installed in the top of first fixed link, and the bottom of cabinet body is installed with one -way open -and -close subassembly, and the top of one -way open -and -close subassembly can with the bottom contact of support rod.

Description

Technical Field

[0001] This utility model relates to the field of plastic film bag processing technology, specifically a cooling device for the production of plastic film bags. Background Technology

[0002] Plastic film bags are films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins, used for packaging and as a coating layer. Plastic packaging and plastic packaging products are gaining an increasingly larger market share, especially composite plastic flexible packaging, which is widely used in the food, pharmaceutical, and chemical industries. Food packaging accounts for the largest proportion, including beverage packaging, frozen food packaging, retortable food packaging, and fast food packaging.

[0003] Utility model patent with publication number "CN215589744U" discloses a cooling device for the production of plastic film bags. The device includes a cabinet with connectors evenly welded sequentially to the inner walls of both sides. Inserts are adhered to the surfaces of the connectors. The overlapping mechanism includes an overlapping plate with a limiting groove on its surface. Both ends of the overlapping plate have protruding edges, and slots are formed on the surfaces of both protruding edges. The two ends of the overlapping plate are inserted into the connectors inside the cabinet via the two protruding edges, and the inserts on the connectors slide into the slots on the protruding edges. This utility model uses a cooler and ductwork to supply air to the inside of the cabinet for cooling, ensuring a uniform cooling effect on the plastic film bags in each layer, facilitating subsequent processing.

[0004] The device has shortcomings in use. Although it can maintain a uniform cooling effect on each layer of plastic film bags, the cabinet door needs to be opened for a long time each time the plastic film bags are cooled, which makes it easy for the internal cold air to escape, requiring more time to cool down the next time. In addition, it needs to be installed and disassembled each time, which greatly increases the working time and complexity. Therefore, we have proposed a cooling device for the production of plastic film bags. Utility Model Content

[0005] This invention provides a cooling device for the production of plastic film bags, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cooling device for the production of plastic film bags includes a cabinet, the top of which has a through square hole, and an overlapping plate above the square hole that matches the size of the square hole.

[0008] The center of the lap plate is concave downwards, and multiple first through holes are opened at the bottom center of the lap plate;

[0009] A support rod is installed on the bottom of the outer periphery of the lap plate. The bottom of the support rod is lower than the bottom center of the lap plate, and the bottom of the support rod is in contact with the top of the lap plate located at its bottom.

[0010] The cabinet has a first fixing rod and a second fixing rod installed on its inner wall, with the first fixing rod located below the second fixing rod.

[0011] A rotatable limiting block is installed on the outer circumference of the second fixing rod. The top of one end of the limiting block abuts against the bottom of the outer circumference of the overlapping plate, and the other end of the limiting block is located directly above the first fixing rod. A spring is installed at its bottom.

[0012] One end of the spring is mounted on the top of the first fixing rod;

[0013] The bottom of the cabinet is equipped with a one-way opening and closing component, the top of which can contact the bottom of the support rod.

[0014] Preferably, a rotatable rotating rod is installed at one end of the top of the central recess of the overlapping plate, and a clamping plate is installed on the outer circumference of the rotating rod;

[0015] The size of the clamping plate is the same as the size of the recess, and the bottom of the clamping plate can fit against the top of the recess;

[0016] The top of the clamping plate has multiple second through holes, and the bottom of the clamping plate and the top of the recess can clamp the plastic film bag.

[0017] Preferably, a locking device is installed on the top of the clamping plate, the locking device including a fixing block, a rotating plate and a first shaft pin;

[0018] The fixing block is located at the top center of the clamping plate, away from the rotating rod at one end.

[0019] A rotatable first shaft pin is installed at one end of the fixed block away from the bottom side of the recess, and a rotating plate that can fit against one end of the fixed block near the center of the clamping plate is installed on the outer circumference of the first shaft pin.

[0020] A first torsion spring is installed on the outer circumference of the first shaft pin, which can drive the rotating plate to approach and fit against the fixed block.

[0021] Preferably, the locking device further includes an abutment block;

[0022] An arc-shaped hole penetrating the fixing block is provided at one end of the fixing block near the center of the clamping plate;

[0023] A stop block is installed on the side of the rotating plate that is in contact with the fixed block. The stop block is slidably connected in the arc-shaped hole and passes through the arc-shaped hole to contact the side of the recessed bottom.

[0024] Preferably, a groove is provided on the bottom side of the recess corresponding to the position of the abutment block, and the size of the groove is adapted to the size of the abutment block, so that the abutment block can be inserted into the groove.

[0025] Preferably, an air supply duct is installed on the side of the cabinet and extends into the cabinet body, and a cooler is installed outside the cabinet body, with the air outlet of the cooler connected to the air supply duct.

[0026] There are multiple air supply ducts, which are inclined, and the air outlets of the air supply ducts are located at the top and bottom of the overlapping plate, respectively.

[0027] The air supply duct at the top of the overlapping plate slopes downwards from the outside to the inside, and the air outlet of the air supply duct is aligned with the top of the clamping plate.

[0028] The air supply duct at the bottom of the overlapping plate slopes upwards from the outside to the inside, and the air outlet of the air supply duct is aligned with the bottom of the overlapping plate.

[0029] Preferably, the one-way opening and closing assembly includes a second torsion spring, a discharge baffle, and a second shaft pin;

[0030] A rotatable second pivot pin is installed on the bottom side of the cabinet.

[0031] A discharge baffle is installed on the outer circumference of the second shaft pin, and the discharge baffle can fit and seal the bottom of the cabinet.

[0032] The second torsion spring is connected to the second shaft pin to drive the discharge baffle to close the bottom of the cabinet.

[0033] This utility model has the following beneficial effects:

[0034] 1. This cooling device for the production of plastic film bags has a first square hole at the top of the cabinet that matches the size of the overlapping plate. This allows the outer periphery of the overlapping plate to fit into the first square hole, preventing cold air from escaping. The overlapping plate and the clamping plate can clamp the plastic film bags to be cooled, making them more stable. A locking device is installed at the top of the clamping plate, which can lock the clamping plate and the overlapping plate together, thus better securing the plastic film bags during clamping. The inclined air supply duct can directly direct the cold air to the top and bottom of the plastic film bags, making them cool faster.

[0035] 2. This cooling device for plastic film bag production features a support rod located at the bottom periphery of the overlapping plate, lower than the center bottom of the overlapping plate. The support rod contacts the top periphery of the overlapping plate at its bottom, creating a gap between the overlapping plates for better cooling of the plastic film bags. One end of a limiting block abuts against the bottom periphery of the overlapping plate, restricting its position. A one-way opening and closing assembly is located at the bottom of the cabinet. The bottom of the lowest support rod contacts the top of the discharge baffle. During replacement, simply push the overlapping plate into the square opening at the top of the cabinet, causing the remaining overlapping plates to move downwards. The lowest support rod then pushes the discharge baffle out of the cabinet. After completion, the one-way opening and closing assembly automatically closes, eliminating the need to open the cabinet door for plastic film bag cooling replacement. This improves work efficiency, reduces cold air leakage, and allows the overlapping plates to move out of the cabinet layer by layer from the top, ensuring sufficient contact between the overlapping plates and the cold air inside the cabinet, guaranteeing adequate cooling of the plastic film bags. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of this utility model;

[0037] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0038] Figure 3 This is a cross-sectional structural diagram of the lap joint plate of this utility model;

[0039] Figure 4 This is a schematic diagram of the locking device of this utility model;

[0040] Figure 5 This is a schematic diagram of the structure of the one-way opening and closing component of this utility model;

[0041] Figure 6 This is a schematic diagram of the air supply duct and the overlapping plate of this utility model.

[0042] In the diagram: 1. Cabinet body; 2. Overlap plate; 3. Clamping plate; 4. Air supply duct; 5. First fixing rod; 6. Limiting block; 7. Spring; 8. Support rod; 9. Discharge baffle; 10. Fixing block; 11. Abutting block; 12. Rotating plate; 13. First shaft pin; 14. Second shaft pin; 15. Second fixing rod. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] Please see Figures 1 to 3 A cooling device for the production of plastic film bags includes a cabinet 1, the top of which has a through square hole, and an overlapping plate 2 that matches the size of the square hole is provided above the square hole; the overlapping plate 2 can close the top of the cabinet 1, so that the cold air inside the cabinet 1 can circulate inside the cabinet 1, and the overlapping plate 2 can be moved into the interior of the cabinet 1 through the square hole.

[0045] The center of the overlapping plate 2 is recessed downwards, and multiple first through holes are opened at the bottom center of the overlapping plate 2. The recessed part of the overlapping plate 2 can store plastic film bags, and the first through holes at the bottom center of the overlapping plate 2 can allow the cold air inside the cabinet 1 to come into contact with the bottom of the plastic film bag through the bottom of the overlapping plate 2, thereby cooling the bottom of the plastic film bag.

[0046] A support rod 8 is installed on the bottom of the outer periphery of the overlapping plate 2. The bottom of the support rod 8 is lower than the bottom center of the overlapping plate 2, and the bottom of the support rod 8 contacts the top of the overlapping plate 2 located at its bottom. This creates a gap between the two overlapping plates 2, allowing cold air to come into contact with the upper and lower surfaces of the groove of the overlapping plate 2 through the gap, so that the plastic film bag inside the groove of the overlapping plate 2 can be fully cooled.

[0047] A first fixing rod 5 and a second fixing rod 15 are installed on the inner wall of the cabinet 1. The first fixing rod 5 is located below the second fixing rod 15. The second fixing rod 15 is cylindrical.

[0048] A rotatable limiting block 6 is installed on the outer circumference of the second fixing rod 15. The top of one end of the limiting block 6 abuts against the bottom of the outer circumference of the overlapping plate 2, and the other end of the limiting block 6 is located directly above the first fixing rod 5. A spring 7 is installed at its bottom. The limiting block 6 can abut against the overlapping plate 2 to stabilize the overlapping plate 2 inside the cabinet 1. The limiting block 6 can rotate. When pushing the overlapping plate 2 down, the end of the limiting block 6 that abuts against the overlapping plate 2 can rotate to the bottom of the overlapping plate 2, so that the overlapping plate 2 can move down smoothly. After the movement is completed, the spring 7 can pull the other end of the limiting block 6 to reset the limiting block 6, so that one end of the limiting block 6 continues to abut against the bottom of the outer circumference of the overlapping plate 2 after it has moved down. This allows the overlapping plate 2 to enter the bottom of the cabinet 1 layer by layer, so that the overlapping plate 2 can be cooled more fully inside the cabinet 1.

[0049] One end of the spring 7 is installed on the top of the first fixing rod 5; the first fixing rod 5 is located at the bottom of the limiting block 6 and the first fixing rod 5 is fixed on the inner wall of the cabinet 1 so that the spring 7 installed on the top of the first fixing rod 5 can generate an elastic deformation force on the limiting block 6, and the limiting block 6 can be restored to its original position after the overlapping plate 2 is moved.

[0050] The bottom of the cabinet 1 is equipped with a one-way opening and closing assembly. The top of the one-way opening and closing assembly can contact the bottom of the support rod 8. The one-way opening and closing assembly can only be opened outwards from the cabinet 1. When the overlapping plate 2 moves down, the bottom support rod 8 can push the one-way opening and closing assembly outwards from the cabinet 1, so that the bottom overlapping plate 2 can be moved out of the cabinet 1 through the one-way opening and closing assembly. Then, the one-way opening and closing assembly returns to its original position under the action of the second torsion spring (not shown in the figure) to seal the bottom of the cabinet 1.

[0051] Please see Figures 1 to 3 A rotatable rotating rod is installed at one end of the top of the recessed center of the overlapping plate 2, and a clamping plate 3 is installed on the outer circumference of the rotating rod; the rotating rod cooperates with the clamping plate 3 to allow the clamping plate 3 to open and close at the top of the overlapping plate 2.

[0052] The size of the clamping plate 3 is the same as the size of the recess, and the bottom of the clamping plate 3 can fit against the top of the recess; the clamping plate 3 can fit completely against the recess, which can better clamp and fix the plastic film bag located at the top of the recess and the bottom of the clamping plate 3.

[0053] The top of the clamping plate 3 has multiple second through holes, and the bottom of the clamping plate 3 and the recessed top can clamp the plastic film bag; the second through holes can allow the cold air inside the cabinet 1 to contact and cool the top of the plastic film bag.

[0054] Please see Figures 1 to 4 The top of the clamping plate 3 is equipped with a locking device, which includes a fixing block 10, a rotating plate 12 and a first shaft pin 13. The locking device can lock the position of the clamping plate 3 when it is in contact with the recess, so that the clamping plate 3 and the recess can better clamp the plastic film bag.

[0055] The fixing block 10 is located at the top center of the clamping plate 3, away from the rotating rod. The clamping plate 3 rotates together with the rotating rod, and the angle of rotation of the clamping plate 3 can be better controlled by placing the fixing block 10 at the end away from the rotating rod.

[0056] A rotatable first shaft pin 13 is installed at one end of the fixed block 10 away from the bottom side of the recess. A rotating plate 12 is installed on the outer circumference of the first shaft pin 13, which can fit against one end of the fixed block 10 near the center of the clamping plate 3. The rotating plate 12 can rotate together with the first shaft pin 13.

[0057] A first torsion spring is installed on the outer circumference of the first shaft pin 13, which can drive the rotating plate 12 to approach and fit against the fixed block 10; after rotating the rotating plate 12, the first torsion spring (not shown in the figure) can reset the rotating plate 12 and fit tightly against the end of the fixed block 10 near the center of the clamping plate 3.

[0058] Please see Figures 1 to 4The locking device further includes an abutment block 11; the clamping plate 3 and the overlapping plate 2 can be locked by the abutment block 11.

[0059] An arc-shaped hole is provided at one end of the fixing block 10 near the center of the clamping plate 3, through which the fixing block 10 is inserted;

[0060] A stop block 11 is installed on the side of the rotating plate 12 that is in contact with the fixed block 10. The stop block 11 is slidably connected in the arc-shaped hole and passes through the arc-shaped hole to contact the side of the bottom of the recess. The rotating plate 12 can drive the stop block 11 to move along the arc-shaped hole trajectory in the fixed block 10. The stop block 11 can pass through the arc-shaped hole to contact the side of the bottom of the recess, thereby locking the clamping plate 3 and the overlapping plate 2.

[0061] Please see Figures 1 to 4 The bottom side of the recess is provided with a groove corresponding to the position of the abutment block 11. The size of the groove is adapted to the size of the abutment block 11, and the abutment block 11 can be inserted into the groove. The abutment block 11 can abut against the groove, and the abutment block 11 can make the clamping plate 3 fit tightly against the top of the recess to clamp the plastic film bag.

[0062] Please see Figures 1 to 6 The side of the cabinet 1 is equipped with an air supply duct 4 that extends into the cabinet 1. A cooler is provided outside the cabinet 1, and the air outlet of the cooler is connected to the air supply duct 4. Air from the cooler can be introduced into the cabinet 1 through the air supply duct 4 to cool the plastic film bag inside the cabinet 1.

[0063] There are multiple air supply pipes 4, which are inclined. The air outlets of the air supply pipes 4 are located at the top and bottom of the overlapping plate 2, respectively. This allows the air supply pipes 4 to blow cold air out of both the top and bottom of the overlapping plate 2, thus better cooling the plastic film bag inside the recess of the overlapping plate 2.

[0064] The air supply duct 4 at the top of the overlapping plate 2 slopes downward from the outside to the inside, and the air outlet of the air supply duct 4 is aligned with the top of the clamping plate 3; this allows the cold air to directly contact the top of the clamping plate 3 and contact the top of the plastic film bag through the second through hole, thereby cooling the top of the plastic film bag.

[0065] The air supply duct 4 at the bottom of the overlapping plate 2 slopes upward from the outside to the inside, and the air outlet of the air supply duct 4 is aligned with the bottom of the overlapping plate 2; this allows the cold air to directly contact the bottom of the overlapping plate 2 and contact the bottom of the plastic film bag through the first through hole, thereby cooling the bottom of the plastic film bag.

[0066] Please see Figures 1 to 5The one-way opening and closing assembly includes a second torsion spring, a discharge baffle 9, and a second shaft pin 14; the one-way opening and closing assembly can only be opened to the outside of the cabinet 1, and can seal the bottom of the cabinet 1 so that the cold air can only move inside the cabinet 1.

[0067] A rotatable second pivot pin 14 is installed on the bottom side of the cabinet 1;

[0068] A discharge baffle 9 is installed on the outer circumference of the second shaft pin 14. The discharge baffle 9 can fit together to seal the bottom of the cabinet 1. The discharge baffle 9 rotates together with the second shaft pin 14. By controlling the rotation of the discharge baffle 9, the one-way opening and closing component can be controlled to open outward of the cabinet 1. The discharge baffles 9 can fit together to seal the bottom of the cabinet 1, so that the cold air is inside the cabinet 1.

[0069] The second torsion spring is connected to the second shaft pin 14 to drive the discharge baffle 9 to close the bottom of the cabinet 1; the discharge baffle 9 can be reset by the second torsion spring (not shown in the figure), so that the one-way opening and closing component can be automatically closed after the overlapping plate 2 is moved out of the cabinet 1, thus closing the bottom of the cabinet 1 and preserving the cold air inside the cabinet 1.

[0070] In summary, this cooling device for the production of plastic film bags is used by opening the locking device, rotating the clamping plate 3, placing the plastic film bag to be cooled between the clamping plate 3 and the overlapping plate 2, closing the clamping plate 3 to close the locking device, and positioning the support rod 8 downwards to contact the outer surface of the overlapping plate 2. Pushing the overlapping plate 2 causes the support rod 8 to push the bottom overlapping plate 2 downwards. The end of the limiting block 6 that contacts the overlapping plate 2 tilts downwards along with the overlapping plate 2. The bottommost support rod 8 contacts the top of the bottom one-way opening and closing component, pushing it downwards to open the overlapping plate 2. When the top of the outer perimeter is flush with the top of the cabinet 1, the overlapping plate 2 can seal the top of the cabinet 1 with the plastic film bag at its bottom that needs to be cooled. The limiting block 6 returns to its original position under the tension of the spring 7 at one end. The top of one end of the limiting block 6 continues to abut against the top of the outer perimeter of the overlapping plate 2. The one-way opening and closing component at the bottom of the cabinet 1 also returns to its original position under the action of the second torsion spring inside. The one-way opening and closing component seals the bottom of the cabinet 1, so that the cold air inside the cabinet 1 will not overflow during cooling. When replacing, it is only necessary to push the new overlapping plate 2 in from the top of the cabinet 1 to achieve replacement.

[0071] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" 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 terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0072] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling device for the production of plastic film bags, comprising a cabinet (1), characterized in that: The top of the cabinet (1) has a through square hole, and an overlapping plate (2) that matches the size of the square hole is provided above the square hole. The center of the lap plate (2) is concave downwards, and multiple first through holes are opened at the bottom center of the lap plate (2); A support rod (8) is installed on the bottom of the outer periphery of the overlapping plate (2). The bottom of the support rod (8) is lower than the bottom center of the overlapping plate (2), and the bottom of the support rod (8) is in contact with the top of the overlapping plate (2) located at its bottom. The cabinet (1) is equipped with a first fixing rod (5) and a second fixing rod (15) on its inner wall, with the first fixing rod (5) located below the second fixing rod (15); A rotatable limiting block (6) is installed on the outer circumference of the second fixing rod (15). The top of one end of the limiting block (6) abuts against the bottom of the outer circumference of the overlapping plate (2), and the other end of the limiting block (6) is located directly above the first fixing rod (5). A spring (7) is installed at its bottom. One end of the spring (7) is mounted on the top of the first fixing rod (5); The bottom of the cabinet (1) is equipped with a one-way opening and closing component, and the top of the one-way opening and closing component can contact the bottom of the support rod (8).

2. The cooling device for producing plastic film bags according to claim 1, characterized in that: A rotatable rotating rod is installed at one end of the top of the central recess of the overlapping plate (2), and a clamping plate (3) is installed on the outer circumference of the rotating rod; The size of the clamping plate (3) is the same as the size of the recess, and the bottom of the clamping plate (3) can fit against the top of the recess; The top of the clamping plate (3) is provided with a plurality of second through holes, and the bottom of the clamping plate (3) and the recessed top can clamp the plastic film bag.

3. The cooling device for producing plastic film bags according to claim 2, characterized in that: The top of the clamping plate (3) is equipped with a locking device, which includes a fixing block (10), a rotating plate (12) and a first shaft pin (13); The fixing block (10) is located at the top center of the clamping plate (3) away from the rotating rod. The fixed block (10) is equipped with a rotatable first shaft pin (13) at one end away from the bottom side of the recess. A rotating plate (12) is installed on the outer circumference of the first shaft pin (13) and can fit against one end of the fixed block (10) near the center of the clamping plate (3). A first torsion spring is installed on the outer circumference of the first shaft pin (13) to drive the rotating plate (12) to approach and fit against the fixed block (10).

4. The cooling device for producing plastic film bags according to claim 3, characterized in that: The locking device further includes an abutment block (11); The fixing block (10) has an arc-shaped hole that passes through the fixing block (10) at one end near the center of the clamping plate (3); An abutment block (11) is installed on the side of the rotating plate (12) that is in contact with the fixed block (10). The abutment block (11) is slidably connected in the arc-shaped hole and passes through the arc-shaped hole to contact the side of the recessed bottom.

5. The cooling device for producing plastic film bags according to claim 4, characterized in that: A groove is provided on the bottom side of the recess, corresponding to the position of the abutment block (11). The size of the groove is adapted to the size of the abutment block (11), and the abutment block (11) can be inserted into the groove.

6. The cooling device for producing plastic film bags according to claim 5, characterized in that: An air supply duct (4) extending into the cabinet (1) is installed on the side of the cabinet (1), and a cold air fan is provided outside the cabinet (1). The air outlet of the cold air fan is connected to the air supply duct (4). There are multiple air supply ducts (4), the air supply ducts (4) are inclined, and the air outlets of the air supply ducts (4) are located at the top and bottom of the overlapping plate (2); The air supply duct (4) at the top of the overlapping plate (2) is inclined downward from the outside to the inside, and the air outlet of the air supply duct (4) is aligned with the top of the clamping plate (3). The air supply duct (4) at the bottom of the overlapping plate (2) is inclined upward from the outside to the inside, and the air outlet of the air supply duct (4) is aligned with the bottom of the overlapping plate (2).

7. The cooling device for producing plastic film bags according to claim 6, characterized in that: The one-way opening and closing assembly includes a second torsion spring, a discharge baffle (9), and a second shaft pin (14); The bottom side of the cabinet (1) is equipped with a rotatable second pivot pin (14); A discharge baffle (9) is installed on the outer circumference of the second shaft pin (14), and the discharge baffle (9) can fit and seal the bottom of the cabinet (1); The second torsion spring is connected to the second shaft pin (14) to drive the discharge baffle (9) to close the bottom of the cabinet (1).

Images