Automatic bagging vacuum packaging machine

Abstract

The application relates to the packaging technical field and particularly relates to an automatic bagging vacuum packaging machine, which comprises a conveying unit, a bag placing unit, a bagging unit and a sealing unit, the sealing unit comprises a base, a bottom plate, a support column and a top plate, the sealing unit further comprises a longitudinal moving frame, a transverse moving frame, an adjusting assembly, an air extraction strip, a closing assembly and a heat sealing plate, the longitudinal moving frame is connected to the upper end of the bottom plate, the transverse moving frame is connected to the upper end of the longitudinal moving frame, the adjusting assembly is connected to the front end of the transverse moving frame, the air extraction strip is connected to the front end of the adjusting assembly, the closing assembly and the heat sealing plate are both connected between the bottom plate and the top plate, and the heat sealing plate is located at the front end of the closing assembly, the packaging bag margin is used to form a buffer at the edge of the circuit board, so that the damage of the packaging bag is effectively avoided, and the purpose of guaranteeing the sealing effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, specifically to an automatic bagging vacuum packaging machine. Background Technology

[0002] Automatic bagging vacuum packaging machines are highly automated packaging equipment. Their main function is to put products into bags and package them through vacuuming, heat sealing, and other steps. By vacuum packaging products, the products can be effectively isolated from air, extending their shelf life and preventing oxidation and moisture.

[0003] The working process of an automatic bagging vacuum packaging machine is as follows: a conveyor belt transports packaging bags, which are filled with products during the transport process. The product-filled packaging bags are connected to a vacuum pump through an air extraction pipe. The vacuum pump extracts the air from the packaging bags. After vacuuming, a heat-sealing mechanism heat-seals the bag opening, allowing the packaging bags to maintain a sealed state for a long time. Some factories use vacuum packaging machines to package circuit boards to reduce oxidation during transportation. However, during vacuum packaging, a negative pressure is created inside the packaging bag, causing the bag to gradually adhere tightly to the surface of the circuit board during the air extraction process. Since some circuit boards are cut, their edges are relatively sharp. During negative pressure packaging, the top and bottom sides of the packaging bag adhere tightly to the edges of the circuit board. Figure 1 As shown, the edges of the circuit board can easily puncture the packaging bag, causing it to leak air.

[0004] Existing technologies offer some solutions, such as increasing the thickness of packaging bags, passivating the edges of circuit boards, and covering the surface of circuit boards with protective pads. However, increasing the thickness of packaging bags leads to higher packaging bag costs, passivating the edges of circuit boards leads to higher production costs, and covering the surface of circuit boards with protective pads requires additional automation devices in highly automated equipment, thus increasing equipment costs. For some mid-range circuit boards, the economic benefits for enterprises are limited, and the increase in production costs will lead to a decrease in enterprise profits.

[0005] Therefore, an automatic bagging vacuum packaging machine is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic bagging vacuum packaging machine that solves the problem that when vacuum packaging circuit boards, the edges of the circuit boards are prone to damage to the packaging bag under high negative pressure, resulting in poor sealing effect and affecting the quality of the circuit boards. By moving the excess material of the packaging bag from both sides of the packaging bag to the edges of the circuit board during the packaging process, a buffer is formed at the edges of the circuit board, thereby effectively avoiding damage to the packaging bag and achieving the purpose of ensuring sealing effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic bagging vacuum packaging machine includes a conveying unit, a bag-positioning unit, a bag-packing unit, and a sealing unit. The conveying unit includes a conveyor and a belt. A packaging bag is placed on the surface of the belt, and the left end of the packaging bag is placed over the surface of a circuit board to be packaged. The sealing unit includes a base, a bottom plate, a support column, and a top plate. The sealing unit also includes a longitudinal moving frame, a transverse moving frame, an adjusting component, a suction strip, a sealing component, and a heat-sealing plate. The longitudinal moving frame is connected to the upper end of the bottom plate, and the transverse moving frame is connected to the upper end of the longitudinal moving frame. The adjusting component is connected to the front end of the transverse moving frame, and the suction strip is connected to the front end of the adjusting component. The sealing component and the heat-sealing plate are both connected between the bottom plate and the top plate. The heat-sealing plate is located at the front end of the sealing component. Under the sequential action of the longitudinal and transverse moving frames, the adjusting component moves the suction strip from the center of the packaging bag to the edge. When the suction strip moves to a designated position, the adjusting component rotates the suction strip to support the packaging bag along the side edge of the circuit board. The sealing component fits against the suction strip to seal the packaging bag. After the suction strip is removed, the heat-sealing plate solidifies the packaging bag.

[0009] The above solution utilizes the excess material from the packaging bag. By moving this excess material from the left and right sides of the packaging bag to the corners of the circuit board, the contact between the packaging bag and the corners of the circuit board is reduced, effectively preventing damage to the packaging bag under high negative pressure. At the same time, the fact that the corners of the circuit board do not contact the packaging bag allows the packaging bag to withstand greater vacuum pressure, thereby further ensuring the quality of the circuit board.

[0010] Preferably, the longitudinal moving frame includes a longitudinal frame and a push rod. The longitudinal frame is connected to the upper side of the base plate, and the push rod is connected to the longitudinal frame. The transverse moving frame includes a transverse frame, a motor, and a screw. The transverse frame is connected to the front end of the push rod, the motor is connected to the left side of the transverse frame, and the right end of the motor is connected to the screw. The screw surface thread is divided into different helical directions along the longitudinal central axis of the transverse frame.

[0011] With the above scheme, the screw surface thread is bidirectional helical, so that when the screw rotates, it can drive the two adjustment components to move in different directions.

[0012] Preferably, the enclosure assembly includes an electric push rod, a longitudinal pressure plate, an electric pull rod, and a side pressure plate. The multiple electric push rods are respectively connected to the front ends of the bottom plate and the top plate. The longitudinal pressure plate is connected to the end of the electric push rod near the exhaust strip. The electric pull rod is connected to the rear end of the transverse frame. The side pressure plate is connected to the power output end of the electric pull rod. The longitudinal pressure plate is in the shape of an isosceles trapezoid.

[0013] With the above scheme, the longitudinal pressure plate is an isosceles trapezoid with two inclined sides. After the mounting wheel rotates to a specified angle, the side of the air extraction strip is parallel to the side of the longitudinal pressure plate, which facilitates the downward movement of the longitudinal pressure plate to seal the packaging bag.

[0014] Preferably, the side pressure plate includes a plate body and a sealing strip. The plate body is connected to an electric pull rod. The plate body is triangular in shape, and the hypotenuse of the plate body is parallel to the hypotenuse of the longitudinal pressure plate. The sealing strip is connected to the hypotenuse of the plate body. When the air extraction strip rotates to a designated position, the movement trajectory of the sealing strip comes into contact with the air extraction strip. The sealing strip is made of rubber.

[0015] With the above solution, the plate body is parallel to the inclined side of the longitudinal pressure plate, so that the plate body can fit with the longitudinal pressure plate to achieve a good sealing effect on the packaging bag. The sealing strip is made of rubber material and can be deformed, so it can be adapted to fit the air extraction strip and ensure the sealing effect of the air extraction strip when the side pressure plate and the longitudinal pressure plate are combined.

[0016] Preferably, the adjustment assembly includes a frame, a motor, a transmission gear, a driven gear, and mounting wheels. The frame is connected to a screw, the motor is connected inside the frame, the transmission gear is connected to the front end of the motor, the driven gear is located above the transmission gear and meshes with the transmission gear, and multiple mounting wheels are respectively connected to the front ends of the driven gear and the transmission gear. The transmission ratio between the transmission gear and the driven gear is 1:1.

[0017] With the above scheme, the transmission ratio of the drive gear and the driven gear is 1:1. Thus, when the drive gear drives the driven gear to rotate, the mounting wheels on the drive gear and the driven gear can rotate synchronously, which facilitates the air extraction strip to support the packaging bag.

[0018] Preferably, the mounting wheel includes a wheel body, a limiting frame, a slider, a side plate, a spring, and a retaining plate. Multiple wheel bodies are respectively connected to the front ends of the driven gear and the transmission gear. The limiting frame is connected to the front end of the wheel body, the slider is connected to the front end of the limiting frame, the side plate is connected to both sides of the slider, one end of the spring is connected to the slider, and the other end of the spring is connected to the limiting frame. The retaining plate is connected to the rear side of the longitudinal pressure plate and the side pressure plate. Multiple protrusions are connected to the surface of the retaining plate, and the surfaces of the protrusions are arc-shaped.

[0019] With the above scheme, when the longitudinal pressure plate and the side pressure plate move, they will carry protrusions to contact the side plate, causing the side plate to drive the slider to slide, thereby achieving the purpose of adjusting the position of the suction strip. By setting multiple protrusions, the suction strip can be made to vibrate multiple times, thereby achieving the purpose of adjusting the opening of the packaging bag.

[0020] Preferably, the suction strip includes a strip body, a support frame, a suction groove, a baffle, and a tension spring. The strip body and the support frame are both connected to the front end of the slider. The support frame is connected to the strip body and is triangular in shape. The suction groove is opened on the opposite side of the two strip bodies. A baffle is connected in the suction groove. The front end of the baffle is connected to the tension spring, and the rear end of the tension spring is connected to the rear end of the suction groove. Thus, the support frame is triangular, which provides good support when the longitudinal pressure plate seals the packaging bag.

[0021] Preferably, the distance between the front and rear ends of the longitudinal pressure plate is less than the distance between the front and rear ends of the side pressure plate. Both the longitudinal pressure plate and the side pressure plate are connected to sealing pads. When the longitudinal pressure plate and the side pressure plate are in contact, the rear end of the packaging bag is located between the rear walls of the longitudinal pressure plate and the side pressure plate. Thus, when the packaging bag is pressed by the longitudinal pressure plate and the side pressure plate, the bag opening is located behind the longitudinal pressure plate, thereby making the sealing area of ​​the packaging larger and achieving a good sealing effect.

[0022] Preferably, the sealing pad is made of rubber, and the elasticity of the sealing strip is greater than that of the sealing pad.

[0023] With the above solution, the elasticity of the sealing strip is greater than that of the sealing pad, thus the sealing strip can easily undergo adaptive deformation after being attached to the extraction strip.

[0024] Preferably, the heat-sealing plate includes an upper sealing plate and a lower sealing plate, which are respectively connected to the front ends of the top plate and the bottom plate. The lower side of the upper sealing plate is connected with a locking block, and the upper surface of the lower sealing plate is provided with an array of slots. The locking block and the slot are fitted with a clearance fit.

[0025] The above solution allows the gap between the card block and the slot to facilitate the connection between the card block and the slot and the packaging bag. At the same time, the mutual cooperation between the card block and the slot can form a textured surface on the packaging bag, thereby improving the sealing effect of the packaging bag.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. This invention solves the problem that during vacuum packaging of circuit boards, the edges of the circuit board are prone to damage to the packaging bag under high negative pressure, resulting in poor sealing and affecting the quality of the circuit board. By setting an adjustment component, the adjustment component drives the suction strip to rotate inside the packaging bag to the outside of the circuit board edge, so that the suction strip opens the packaging bag. The sealing component seals the opening of the packaging bag along the suction strip. During suction, the suction strip forms support inside the packaging bag, changing the position of the excess material on the side of the packaging bag, thereby preventing the top and bottom sides of the packaging bag from pressing on the edges of the circuit board, effectively improving the service life of the packaging bag, ensuring the sealing effect of the packaging bag, and thus ensuring the quality of the vacuum-packed circuit board.

[0028] 2. By setting up an adjustment component, when the motor drives the mounting wheel to rotate, it will also drive the suction strip to rotate. Since the suction strip is away from the axis of the mounting wheel, the distance between two adjacent suction strips after rotation increases, thereby achieving the purpose of supporting the packaging bag. By rotating the suction strip to the edge of the circuit board, the packaging bag is supported during suction, so that the excess packaging bag accumulates at the edge of the circuit board. At this time, the packaging bag and the circuit board are in planar contact, which can further increase the vacuum pressure and achieve the purpose of further improving the quality of the packaging circuit board.

[0029] 3. By setting up a closed assembly, when the longitudinal pressure plate and side pressure plate approach the packaging bag, they will drive the clamping plate to move. During the movement of the clamping plate, it will drive the protrusion to squeeze the side plate, so that the side plate will drive the vacuum strip to move through the slider. The spring will push the slider to reset, thus realizing a cycle of relaxation to tension to relaxation to tension at the opening of the packaging bag. In this way, when the longitudinal pressure plate and side pressure plate press the opening of the packaging bag, the flatness of the packaging bag opening is effectively improved, thereby effectively improving the sealing effect of the longitudinal pressure plate and side pressure plate, facilitating vacuum extraction, and thus effectively ensuring the quality of the circuit board. Attached Figure Description

[0030] Figure 1 Renderings of existing technologies;

[0031] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the sealing unit portion of the present invention;

[0033] Figure 4 This is a schematic diagram of the longitudinal moving frame portion of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the enclosed component part of the present invention;

[0035] Figure 6 For the present invention Figure 4 Enlarged view of point A;

[0036] Figure 7 For the present invention Figure 5 Enlarged view of point B;

[0037] Figure 8 This is a schematic diagram of the structure in the working state of the present invention;

[0038] Figure 9 This is a rendering of the packaging for the present invention.

[0039] In the diagram: a) Conveying unit; a1) Conveyor; a2) Belt; b) Bag-swinging unit; c) Bag-packing unit; d) Sealing unit; 1) Base; 2) Base plate; 3) Support column; 4) Top plate; 5) Longitudinal moving frame; 501) Longitudinal frame; 502) Push rod; 6) Lateral moving frame; 601) Lateral frame; 602) Motor; 603) Screw; 7) Adjusting assembly; 701) Frame; 702) Motor; 703) Transmission gear; 704) Driven gear; 705) Mounting wheel; 7051) Wheel body; 7052) Limiting frame; 7053) Sliding block; 705 4. Side plate; 7055. Spring; 7056. Clamping plate; 70561. Protrusion; 8. Air extraction strip; 801. Strip body; 802. Support frame; 803. Air extraction groove; 804. Baffle; 805. Tension spring; 9. Sealing assembly; 901. Electric push rod; 902. Longitudinal pressure plate; 903. Electric pull rod; 904. Side pressure plate; 9041. Plate body; 9042. Sealing strip; 905. Sealing pad; 10. Heat sealing plate; 1001. Upper sealing plate; 10011. Clamping block; 1002. Lower sealing plate; 10021. Groove; m. Packaging bag; n. Circuit board. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so as to provide a more detailed description of their working state and structural features. Obviously, the described embodiments are only some embodiments of the present invention and not complete embodiments. Based on the embodiments of the present invention, other embodiments obtained by those of ordinary skill in the art without creative effort are all within the protection scope of the present invention.

[0041] Please see Figures 2 to 9 This invention provides an automatic bagging and vacuum packaging machine, the technical solution of which is as follows:

[0042] For details, please refer to Figures 2 to 9An automatic bagging vacuum packaging machine includes a conveying unit a, a bag-swinging unit b, a bag-packing unit c, and a sealing unit d. The bag-swinging unit b, bag-packing unit c, and sealing unit d are arranged sequentially from right to left behind the conveying unit a. The conveying unit a includes a conveyor a1 and a belt a2. A packaging bag m is placed on the surface of the belt a2, with the left end of the packaging bag m covering the surface of a circuit board n to be packaged. The bag-swinging unit b moves the packaging bag m onto the belt a2, and the bag-packing unit c pushes the circuit board n into the packaging bag m. The sealing unit d includes a base 1, a bottom plate 2, a support column 3, and a top plate 4. The bottom plate 2 is connected to the upper side of the base 1, the support column 3 is connected to the upper side of the bottom plate 2, and the top plate 4 is connected to the upper side of the support column 3. The sealing unit d also includes a longitudinal moving frame 5, a transverse moving frame 6, an adjusting assembly 7, and an air extraction strip 8. The packaging bag m consists of a sealing component 9 and a heat-sealing plate 10. The longitudinal moving frame 5 is connected to the upper end of the base plate 2, the transverse moving frame 6 is connected to the upper end of the longitudinal moving frame 5, the adjusting component 7 is connected to the front end of the transverse moving frame 6, and the air extraction strip 8 is connected to the front end of the adjusting component 7. The sealing component 9 and the heat-sealing plate 10 are both connected between the base plate 2 and the top plate 4. The heat-sealing plate 10 is located at the front end of the sealing component 9. Under the sequential action of the longitudinal moving frame 5 and the transverse moving frame 6, the adjusting component 7 drives the air extraction strip 8 from the center of the packaging bag m to the edge. When the air extraction strip 8 moves to the designated position, the adjusting component 7 drives the air extraction strip 8 to rotate and support the packaging bag m along the side edge of the circuit board n. The sealing component 9 fits against the air extraction strip 8 to seal the packaging bag m. After the air extraction strip 8 is pulled out, the heat-sealing plate 10 solidifies the packaging bag m.

[0043] By setting the adjustment component 7, the adjustment component 7 can drive the vacuum strip 8 to rotate, thereby supporting the packaging bag m. When the vacuum strip 8 is vacuuming, the vacuum strip 8 supports the packaging bag m, so that the excess of the packaging bag m moves from the left and right sides of the packaging to the edge of the circuit board n, as shown in the figure. This reduces the contact between the packaging bag m and the edge of the circuit board n, effectively avoiding damage to the packaging bag m under high negative pressure. At the same time, the edge of the circuit board n does not contact the packaging bag m, allowing the packaging bag m to withstand greater negative pressure, thereby increasing the vacuuming volume during vacuum packaging, and further ensuring the quality of the circuit board n.

[0044] As one embodiment of the present invention, refer to Figure 3 , Figure 4 , Figure 5 , Figure 8 and Figure 9The longitudinal moving frame 5 includes a longitudinal frame 501 and a push rod 502. The longitudinal frame 501 is connected to the upper side of the base plate 2, and the push rod 502 is connected to the longitudinal frame 501. The transverse moving frame 6 includes a transverse frame 601, a motor 602, and a screw 603. The transverse frame 601 is connected to the front end of the push rod 502, and the front end of the push rod 502 is the power output end. The push rod can push the transverse frame 601 to move back and forth. The motor 602 is connected to the left side of the transverse frame 601, and the right end of the motor 602 is connected to the screw 603. The screw 603 is... The threaded surface is divided into different directions along the longitudinal central axis of the transverse frame 601. Therefore, when the screw 603 rotates, it can drive the two adjusting components 7 to move in different directions. The sealing component 9 includes an electric push rod 901, a longitudinal pressure plate 902, an electric pull rod 903, and a side pressure plate 904. Multiple electric push rods 901 are respectively connected to the front ends of the bottom plate 2 and the top plate 4. The power output end of the electric push rod 901 faces the side of the suction strip 8. The longitudinal pressure plate 902 is connected to the end of the electric push rod 901 near the suction strip 8. The electric pull rod 903 is connected to the transverse frame 601. At the rear end, the side pressure plate 904 is connected to the power output end of the electric pull rod 903. The longitudinal pressure plate 902 is an isosceles trapezoid, so that when the opening of the packaging bag m is closed, the inclined side of the longitudinal pressure plate 902 can fit against the air extraction strip 8. The side pressure plate 904 includes a plate body 9041 and a sealing strip 9042. The plate body 9041 is connected to the electric pull rod 903, and the electric pull rod 903 drives the plate body 9041 to move. The plate body 9041 is triangular, and the inclined side of the plate body 9041 is parallel to the inclined side of the longitudinal pressure plate 902. Therefore, the plate body 9041 and the longitudinal pressure plate 902 fit together. When the two phases are in contact, the gap between the plate 9041 and the longitudinal pressure plate 902 is small, which results in a good compaction effect on the opening of the packaging bag m, making it easier to vacuum. The sealing strip 9042 is connected to the inclined side of the plate 9041. After the vacuum strip 8 rotates to a specified angle, the movement trajectory of the sealing strip 9042 contacts the vacuum strip 8. The specified angle of rotation of the vacuum strip 8 refers to the position where the side of the vacuum strip 8 is parallel to the inclined side of the plate 9041. There are two such positions. This position refers to the position where the distance between two adjacent vacuum strips 8 is the largest. The sealing strip 9042 is made of rubber.

[0045] By setting the longitudinal moving frame 5 and the transverse moving frame 6, the suction strip 8 can be inserted into the packaging bag m and the packaging bag m can be opened. In the initial state, the two adjusting components 7 carrying the suction strip 8 are close to each other. At this time, the longitudinal moving frame 5, through the transverse moving frame 6 and the adjusting components 7, moves the front end of the suction strip 8 to the middle of the rear end of the inner cavity of the packaging bag m. At this time, the transverse moving frame 6 drives the two adjusting components 7 to move to both sides, so that the suction strip 8 moves to both sides of the opening of the packaging bag m. Then, the longitudinal moving frame 5 drives the suction strip 8 to extend into the packaging bag m, and the adjusting components 7... The air extraction strip 8 rotates, causing it to open the bag opening and support the packaging bag m. At this time, the longitudinal pressure plate 902 and the side pressure plate 904 are in contact to close the opening of the packaging bag m. The air extraction strip 8 then extracts air. Because the air extraction strip 8 supports the packaging bag m, the remaining space of the packaging bag m is located at the air extraction strip 8. After the air extraction strip 8 rotates, it is positioned at the edge of the circuit board n, thus preventing the packaging bag m from directly covering the edge of the circuit board n and effectively improving the service life of the packaging bag m.

[0046] As one embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9The adjusting assembly 7 includes a frame 701, a motor 702, a transmission gear 703, a driven gear 704, and mounting wheels 705. The frame 701 is connected to the screw 603 and is threadedly connected to the screw 603. The frame 701 is limited by the transverse bracket 601 and can only move left and right. Therefore, when the screw 603 rotates, the frame 701 moves left and right. The motor 702 is connected inside the frame 701. The transmission gear 703 is connected to the front end of the motor 702, and the front end of the motor 702 is the power output end. The driven gear 704 is located above the transmission gear 703 and meshes with the transmission gear 703. When the transmission gear 703 rotates, it can drive the driven gear 704 to rotate. Multiple mounting wheels 705... The driven gear 704 and the transmission gear 703 are respectively connected to their front ends, so that when the driven gear 704 and the transmission gear 703 rotate, they can drive the connected mounting wheel 705 to rotate. The transmission ratio of the transmission gear 703 and the driven gear 704 is 1:1, so that the rotation angle of the mounting wheel 705 is consistent, which facilitates the connection between the air extraction strip 8 and the sealing assembly 9. The mounting wheel 705 includes a wheel body 7051, a limiting frame 7052, a slider 7053, a side plate 7054, a spring 7055, and a retaining plate 7056. Multiple wheel bodies 7051 are respectively connected to the front ends of the driven gear 704 and the transmission gear 703. There are two driven wheels and two transmission wheels, so the number of wheel bodies 7051 is four. The limiting frame 7052 is connected to... The slider 7053 is connected to the front end of the wheel 7051, and the side plate 7054 is connected to both sides of the slider 7053. The side plate 7054 is elastic. One end of the spring 7055 is connected to the slider 7053, and the other end of the spring 7055 is connected to the limit frame 7052. The clamping plate 7056 is connected to the rear side of the longitudinal pressure plate 902 and the side pressure plate 904. The surface of the clamping plate 7056 is connected with multiple protrusions 70561. The surface of the protrusions 70561 is arc-shaped, which facilitates the sliding of the side plate 7054 on the surface of the protrusions 70561. When the clamping plate 7056 moves, it will contact the side plate 7054, thereby compressing the spring 7055 to contract, thereby adjusting the 8th position of the suction bar. The purpose of this arrangement is that when the side plate 7054 is compressed to the extent of movement, the side plate 7054 will disengage from the protrusion 70561 along its arc-shaped surface. When both the longitudinal pressure plate 902 and the side pressure plate 904 are closed, the position of the slider 7053 is adaptively adjusted within the limiting frame 7052 due to the tension of the packaging bag m. The suction strip 8 includes a strip body 801, a support frame 802, a suction groove 803, a baffle 804, and a tension spring 805. The strip body 801 and the support frame 802 are both connected to the front end of the slider 7053. The support frame 802 is connected to the strip body 801. The strip body 801 is away from the axis of the adjusting wheel, so that when the strip body 801 rotates, it can obtain the maximum rotation range, thus facilitating the support of the packaging bag m.The support frame 802 is triangular, thus supporting the strip 801 and the slider 7053 when the packaging bag m is compressed by the longitudinal pressure plate 902 and the side pressure plate 904. The air extraction groove 803 is opened on the opposite side of the two strips 801. A baffle 804 is connected in the air extraction groove 803. The front end of the baffle 804 is connected to the tension spring 805, and the rear end of the tension spring 805 is connected to the rear end of the air extraction groove 803. The distance between the front and rear ends of the longitudinal pressure plate 902 is less than that between the side pressure plates 902 and 9053. The distance between the front and rear ends of plate 904 determines the contact between the side pressure plate 904 and the longitudinal pressure plate 902, and the contact between the sealing strip 9042 and the baffle 804. The sealing strip 9042 adheres to the baffle 804, limiting the position of the baffle 804 and preventing the air extraction groove 803 from connecting the inner cavity of the packaging bag m to the outside. Both the longitudinal pressure plate 902 and the side pressure plate 904 are connected to sealing pads 905. When the longitudinal pressure plate 902 and the side pressure plate 904 are in contact, the rear end of the packaging bag m is located on the rear wall of the longitudinal pressure plate 902. Between the side pressure plate 904 and the rear wall, the sealing strip 9042 comes into contact with the baffle 804. On the other hand, the longitudinal pressure plate 902 can completely compress the packaging bag m, resulting in a good sealing effect. The sealing pad 905 is made of rubber, allowing it to deform and apply greater pressure to improve the sealing effect. The elasticity of the sealing strip 9042 is greater than that of the sealing pad 905, thus facilitating the sealing of the strip 9042 when it contacts the strip body 801. The heat-sealing plate 10, which is subject to deformation of 42, includes an upper sealing plate 1001 and a lower sealing plate 1002. The upper sealing plate 1001 and lower sealing plate 1002 are respectively connected to the front ends of the top plate 4 and the bottom plate 2. A locking block 10011 is arrayed on the lower side of the upper sealing plate 1001, and slots 10021 are arrayed on the upper surface of the lower sealing plate 1002. The locking block 10011 and the slot 10021 are in clearance fit. Both the upper sealing plate 1001 and the lower sealing plate 1002 can be electrically controlled to move up and down.

[0047] By setting the adjustment component 7, the air extraction strip 8 can be rotated through adjustment, so that the air extraction strip 8 supports the packaging bag m. The sealing component 9 can keep the packaging bag m in an supported state and seal the bag opening. During air extraction, the remaining space of the packaging bag m is at the air extraction strip 8, and the air extraction strip 8 is at the edge of the circuit board n, so that the remaining space of the packaging bag m moves to the edge of the circuit board n, thereby avoiding friction between the packaging bag m and the circuit board n.

[0048] When vacuum-packing circuit board n, the vacuum strips 8 are located on both sides of the inner cavity of the packaging bag m. To ensure the straightness of the opening of the packaging bag m, the vacuum strips 8 move to the left and right to straighten the opening of the packaging bag m. Because the packaging bag m shrinks during vacuuming, there is extra space on the front and back sides of the packaging bag m. This allows the front and back sides of the packaging bag m to adapt and then adhere to the circuit board n. However, the left and right sides of the packaging bag m are held up by the vacuum strips 8 and cannot move. Under high negative pressure, both the upper and lower surfaces of the packaging bag m press against the surface of the circuit board n. Figure 1 The edge of the circuit board n is easy to tear the packaging bag m. By changing the position of the suction strip 8 so that the suction strip 8 is at the edge of the circuit board n, the suction strip 8 supports the packaging bag m when suction is performed. After suction, the excess of the packaging bag m moves to the edge of the circuit board n, thereby avoiding direct contact between the wall of the packaging bag m and the circuit board n.

[0049] By moving the longitudinal moving frame 5 and the transverse moving frame 6, the suction strip 8 moves from the middle of the packaging bag m to both sides. By setting the adjusting component 7, the packaging bag m is further supported, adjusting the remaining position on both sides of the packaging bag m. Specifically, in the initial state, the adjusting component 7 is close to the middle of the screw 603. During operation, the push rod 502 drives the transverse frame 601 forward, causing the suction strip 8 to move forward to the middle of the opening of the packaging bag m. At this time, the motor 602 drives the screw 603 to rotate, thereby causing the two adjusting components 7 to move outward. The adjusting components 7 carry the suction strip... 8. After the adjustment component 7 moves to the designated position, the longitudinal moving frame 5 drives the suction strip 8 forward again through the transverse moving frame 6, so that the suction strip 8 moves into the inner cavity of the packaging bag m. The motor 702 drives the mounting wheel 705 to rotate through the transmission gear 703 and the driven gear 704. The mounting wheel 705 drives the suction strip 8 to rotate around the axis of the mounting wheel 705 through the slider 7053. Since the suction strip 8 deviates from the axis of the mounting wheel 705, the distance between adjacent suction strips 8 increases when the suction strip 8 rotates. The rotation of the suction strip 8 supports the packaging bag m.

[0050] After the packaging bag m is stretched, the opening of the packaging bag m needs to be sealed and then the air is extracted. The longitudinal pressure plate 902 and the side pressure plate 904 are attached to the air extraction strip 8 at the opening of the packaging bag m, thereby achieving the sealing of the opening of the packaging bag m. Specifically, the electric push rod 901 drives the two longitudinal pressure plates 902 to move closer to each other and attach, and then the electric pull rod 903 drives the side pressure plate 904 to attach to the longitudinal pressure plate 902, thereby achieving the sealing of the opening of the packaging bag m.

[0051] To achieve a tight seal, the bag opening is stretched during the sealing process, resulting in a smooth opening. Specifically, when the longitudinal pressure plate 902 and the side pressure plate 904 move, they move the clamping plate 7056. The surface of the clamping plate 7056 is connected to a protrusion 70561. When the protrusion 70561 moves, it presses against the side plate 7054, causing the side plate 7054 to move the slider 7053 within the limiting frame 7052. The slider 7053 then moves the suction strip 8, causing the bag opening to cycle through a series of relaxation-tensioning-relaxation-tensioning cycles. In the tensioned state, the smoothness of the bag opening is adjusted. In the relaxed state, when the longitudinal pressure plate 902 and the side pressure plate 904 apply pressure to the bag, the bag opening can be adjusted adaptively, thus preventing damage to the bag opening caused by the pulling force exerted by the longitudinal pressure plate 902 and the side pressure plate 904 during pressure.

[0052] After the packaging bag m is sealed, the air is extracted by the air extraction strip 8. After the air is extracted, the longitudinal moving frame 5 moves the air extraction strip 8 backward and separates it from the packaging bag m. At this time, the upper sealing plate 1001 and the lower sealing plate 1002 merge to heat seal the packaging bag m.

[0053] Although embodiments of the invention have been described, those skilled in the art can make variations and modifications to the embodiments with an understanding of the principles and spirit of the invention, and other effects can be obtained. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic bagging vacuum packaging machine, comprising a conveying unit (a), a bag-positioning unit (b), a bagging unit (c), and a sealing unit (d), wherein the conveying unit (a) comprises a conveyor (a1) and a belt (a2), on the surface of the belt (a2) being placed a packaging bag (m) and a circuit board (n), and the sealing unit (d) comprises a base (1), a bottom plate (2), a support column (3), and a top plate (4), characterized in that: The sealing unit (d) further includes a longitudinal moving frame (5), a transverse moving frame (6), an adjusting component (7), an extraction strip (8), a sealing component (9), and a heat sealing plate (10). The longitudinal moving frame (5) is connected to the upper end of the base plate (2), the transverse moving frame (6) is connected to the upper end of the longitudinal moving frame (5), the adjusting component (7) is connected to the front end of the transverse moving frame (6), the extraction strip (8) is connected to the front end of the adjusting component (7), and the sealing component (9) and the heat sealing plate (10) are both connected to the base plate. Between (2) and the top plate (4), under the action of the longitudinal moving frame (5) and the transverse moving frame (6) in succession, the adjustment component (7) drives the suction strip (8) to move from the center of the packaging bag (m) to the edge. When the suction strip (8) moves to the designated position, the adjustment component (7) drives the suction strip (8) to rotate and support the packaging bag (m) along the side edge of the circuit board (n). The sealing component (9) fits the suction strip (8) to seal the packaging bag (m). After the suction strip (8) is pulled out, the heat sealing plate (10) solidifies the packaging bag (m). The longitudinal moving frame (5) includes a longitudinal frame (501) and a push rod (502). The longitudinal frame (501) is connected to the upper side of the base plate (2), and the push rod (502) is connected to the longitudinal frame (501). The transverse moving frame (6) includes a transverse frame (601), a motor (602), and a screw (603). The transverse frame (601) is connected to the front end of the push rod (502), the motor (602) is connected to the left side of the transverse frame (601), and the right end of the motor (602) is connected to the screw (603). The thread on the surface of the screw (603) is divided into different directions of rotation along the longitudinal central axis of the transverse frame (601). The adjustment assembly (7) includes a frame (701), a motor (702), a transmission gear (703), a driven gear (704), and mounting wheels (705). The frame (701) is connected to a screw (603). The motor (702) is connected inside the frame (701). The transmission gear (703) is connected to the front end of the motor (702). The driven gear (704) is located above the transmission gear (703) and meshes with the transmission gear (703). A plurality of mounting wheels (705) are respectively connected to the front ends of the driven gear (704) and the transmission gear (703). The transmission ratio of the transmission gear (703) and the driven gear (704) is 1:

1.

2. The automatic bagging vacuum packaging machine according to claim 1, characterized in that: The enclosure assembly (9) includes an electric push rod (901), a longitudinal pressure plate (902), an electric pull rod (903), and a side pressure plate (904). The electric push rods (901) are connected to the front ends of the bottom plate (2) and the top plate (4), respectively. The longitudinal pressure plate (902) is connected to the end of the electric push rod (901) near the exhaust strip (8). The electric pull rod (903) is connected to the rear end of the transverse frame (601). The side pressure plate (904) is connected to the power output end of the electric pull rod (903). The longitudinal pressure plate (902) is in the shape of an isosceles trapezoid.

3. The automatic bagging vacuum packaging machine according to claim 2, characterized in that: The side pressure plate (904) includes a plate body (9041) and a sealing strip (9042). The plate body (9041) is connected to the electric pull rod (903). The plate body (9041) is triangular. The hypotenuse of the plate body (9041) is parallel to the hypotenuse of the longitudinal pressure plate (902). The sealing strip (9042) is connected to the hypotenuse of the plate body (9041). When the suction strip (8) rotates to the designated position, the movement trajectory of the sealing strip (9042) contacts the suction strip (8). The sealing strip (9042) is made of rubber.

4. An automatic bagging vacuum packaging machine according to claim 3, characterized in that: The mounting wheel (705) includes a wheel body (7051), a limiting frame (7052), a slider (7053), a side plate (7054), a spring (7055), and a retaining plate (7056). Multiple wheel bodies (7051) are respectively connected to the front ends of the driven gear (704) and the transmission gear (703). The limiting frame (7052) is connected to the front end of the wheel body (7051), and the slider (7053) is connected to the front end of the limiting frame (7052). The side plate (7054) is connected to both sides of the slider (7053). One end of the spring (7055) is connected to the slider (7053), and the other end of the spring (7055) is connected to the limiting frame (7052). The clamping plate (7056) is connected to the rear side of the longitudinal pressure plate (902) and the side pressure plate (904). The surface of the clamping plate (7056) is connected with a plurality of protrusions (70561), and the surface of the protrusions (70561) is arc-shaped.

5. An automatic bagging vacuum packaging machine according to claim 4, characterized in that: The suction strip (8) includes a strip body (801), a support frame (802), a suction groove (803), a baffle (804), and a tension spring (805). The strip body (801) and the support frame (802) are both connected to the front end of the slider (7053). The support frame (802) is connected to the strip body (801) and is triangular. The suction groove (803) is opened on the opposite side of the two strip bodies (801). The baffle (804) is connected in the suction groove (803). The front end of the baffle (804) is connected to the tension spring (805), and the rear end of the tension spring (805) is connected to the rear end of the suction groove (803).

6. An automatic bagging vacuum packaging machine according to claim 5, characterized in that: The distance between the front and rear ends of the longitudinal pressure plate (902) is less than the distance between the front and rear ends of the side pressure plate (904). Both the longitudinal pressure plate (902) and the side pressure plate (904) are connected to sealing pads (905). When the longitudinal pressure plate (902) and the side pressure plate (904) are attached, the rear end of the packaging bag (m) is located between the rear wall of the longitudinal pressure plate (902) and the rear wall of the side pressure plate (904).

7. An automatic bagging vacuum packaging machine according to claim 6, characterized in that: The sealing pad (905) is made of rubber, and the elasticity of the sealing strip (9042) is greater than that of the sealing pad (905).

8. An automatic bagging vacuum packaging machine according to claim 7, characterized in that: The heat-sealing plate (10) includes an upper sealing plate (1001) and a lower sealing plate (1002). The upper sealing plate (1001) and the lower sealing plate (1002) are respectively connected to the front end of the top plate (4) and the bottom plate (2). The lower side of the upper sealing plate (1001) is connected with a locking block (10011). The upper surface of the lower sealing plate (1002) is provided with an array of slots (10021). The locking block (10011) is in clearance fit with the slot (10021).

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