Automatic bagging vacuum packaging machine

Abstract

The invention relates to the technical field of packaging, in particular 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 supporting column and a top plate, and the sealing unit further comprises a longitudinal moving frame, a transverse moving frame, an adjusting assembly, an air exhaust strip, a sealing 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 exhaust strip is connected to the front end of the adjusting assembly, and the sealing assembly and the heat sealing plate are both connected between the bottom plate and the top plate. According to the circuit board packaging device, buffering is formed at the edges of the circuit board through the packaging bag allowance, then damage to the packaging bag is effectively avoided, and the purpose of guaranteeing the sealing effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, in particular to an automatic bagging vacuum packaging machine. Background Art

[0002] The automatic bagging vacuum packaging machine is a highly automated packaging equipment. Its main function is to put the product into a bag and package it through vacuum extraction, heat sealing and other steps. By vacuum packaging the product, it can effectively isolate the product from the air, extend the shelf life of the product, and avoid product oxidation and moisture.

[0003] The working process of the automatic bagging vacuum packaging machine is: the conveyor belt conveys the packaging bag, and fills the product during the conveying process, connects the packaging bag filled with the product to the vacuum pump through the exhaust pipe, and the vacuum pump extracts the air in the packaging bag. After the vacuum is completed, the bag mouth is heat-sealed by the heat-sealing mechanism, so that the packaging bag can remain sealed for a long time; some factories will use vacuum packaging machines to package circuit boards to reduce the oxidation of circuit boards during transportation. However, during the vacuum packaging process, negative pressure will be formed in the inner cavity of the packaging bag, which will cause the packaging bag to gradually fit tightly to the surface of the circuit board during the air extraction process. Some circuit boards are cut off, and the edges of the circuit boards are sharp. During negative pressure packaging, the upper and lower sides of the packaging bag fit 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 the packaging bag to leak.

[0004] The existing technology provides some solutions, such as increasing the thickness of the packaging bag, passivating the edges of the circuit board and covering the surface of the circuit board with a protective pad. However, increasing the thickness of the packaging bag will increase the cost of the packaging bag, passivating the edges of the circuit board will increase the production cost of the circuit board, and covering the surface of the circuit board with a protective pad requires additional automation devices to be added to equipment with a high degree of automation, which will increase the cost of the equipment. For some mid-range circuit boards, the economic benefits of the enterprise are limited, and the increase in production costs will lead to a decrease in the company's profits.

[0005] Therefore, a kind of automatic bagging vacuum packaging machine is proposed. Summary of the invention

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

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The invention discloses an automatic bagging vacuum packaging machine, comprising a conveying unit, a bag swinging unit, a bagging unit and a sealing unit, wherein the conveying unit comprises a conveyor and a belt, a packaging bag is placed on the surface of the belt, and the packaging bag at the left end is sleeved on the surface of the circuit board to be packaged, the sealing unit comprises a base, a bottom plate, a pillar and a top plate, and the sealing unit also comprises a longitudinal movable frame, a transverse movable frame, an adjusting component, an exhaust strip, a sealing component and a heat-sealing plate, wherein the longitudinal movable frame is connected to the upper end of the bottom plate, the transverse movable frame is connected to the upper end of the longitudinal movable frame, the adjusting component is connected to the front end of the transverse movable frame, the exhaust 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, and the heat-sealing plate is located at the front end of the sealing component, and under the action of the longitudinal movable frame and the transverse movable frame in sequence, the adjusting component drives the exhaust strip to move from the center of the packaging bag to the edge, and when the exhaust strip moves to the specified position, the adjusting component drives the exhaust strip to rotate to prop up the packaging bag along the side edge of the circuit board, the sealing component fits the exhaust strip to seal the packaging bag, and the heat-sealing plate solidifies the packaging bag after the exhaust strip is drawn out.

[0009] Through the above scheme, the surplus of the packaging bag during packaging can be utilized. By moving the surplus of the packaging bag from the left and right sides of the packaging to the corners of the circuit board, the contact between the packaging bag and the corners of the circuit board is reduced, and the damage of the packaging bag under high negative pressure is effectively avoided. At the same time, the corners of the circuit board do not contact the packaging bag, so that the packaging bag can withstand a greater vacuum pressure, thereby further ensuring the quality of the circuit board.

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

[0011] Through the above solution, the thread on the surface of the screw is a bidirectional spiral, and when the screw rotates, the two adjustment components can be driven to move in different directions.

[0012] Preferably, the closing component includes an electric push rod, a longitudinal pressure plate, an electric pull rod and a side pressure plate, and the plurality of 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 one end of the electric push rod close to the vacuum 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, and the longitudinal pressure plate is an isosceles trapezoid.

[0013] Through the above scheme, the longitudinal pressure plate is an isosceles trapezoid with two inclined sides, so that when the mounting wheel rotates to a specified angle, the side of the vacuum strip is parallel to the side of the longitudinal pressure plate, making it easier for the longitudinal pressure plate to move down to close the packaging bag.

[0014] Preferably, the side pressure plate includes a plate body and a closing strip, the plate body is connected to the electric pull rod, the plate body is triangular, the hypotenuse of the plate body is parallel to the hypotenuse of the longitudinal pressure plate, the closing strip is connected to the hypotenuse of the plate body, and when the vacuum strip rotates to a specified position, the movable trajectory of the closing strip contacts with the vacuum strip, and the closing strip is made of rubber material.

[0015] Through the above scheme, the plate body has an oblique edge parallel to the oblique edge 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 closing strip is made of rubber material and can be deformed, so that it can adapt to fit the exhaust strip to ensure the sealing effect of the exhaust 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 a mounting wheel, the frame is connected to the 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 on the upper side of the transmission gear and meshes with the transmission gear, and a plurality of mounting wheels are respectively connected to the front ends of the driven gear and the transmission gear, and the transmission ratio of the transmission gear and the driven gear is 1:1.

[0017] Through the above scheme, the transmission ratio of the transmission gear and the driven gear is 1:1, and when the transmission gear drives the driven gear to rotate, the mounting wheels installed on the transmission gear and the driven gear can rotate synchronously, which is convenient for the vacuum strip to support the packaging bag.

[0018] Preferably, the mounting wheel includes a wheel body, a limit frame, a slider, a side plate, a spring and a clamping plate, the multiple wheel bodies are respectively connected to the front end of the driven gear and the transmission gear, the limit frame is connected to the front end of the wheel body, the slider is connected to the front end of the limit frame, the side plates are 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 limit frame, the clamping plate is connected to the rear side of the longitudinal pressure plate and the side pressure plate, and the surface of the clamping plate is connected to a plurality of protrusions, and the surface of the protrusions is arc-shaped.

[0019] Through the above scheme, the longitudinal pressure plate and the side pressure plate will carry the protrusions to contact the side plates when moving, so that the side plates drive the sliders to slide, thereby achieving the purpose of adjusting the position of the vacuum strip. By setting multiple protrusions, the vacuum strip can be shaken multiple times, thereby achieving the purpose of adjusting the bag opening of the packaging bag.

[0020] Preferably, the air extraction strip includes a strip body, a support frame, an air extraction 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, the support frame is triangular, the air extraction groove is opened on the back side of the two strip bodies, a baffle is connected to the air extraction 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 air extraction groove, thereby, the support frame is triangular, and thus has a good supporting effect when the longitudinal pressure plate closes the packaging bag.

[0021] Preferably, the distance between the front and rear ends of the longitudinal pressure plate is smaller than the distance between the front and rear ends of the side pressure plate, and sealing pads are connected to the surfaces of the longitudinal pressure plate and the side pressure plate. When the longitudinal pressure plate and the side pressure plate are in contact with each other, the rear end of the packaging bag is located between the rear wall of the longitudinal pressure plate and the rear wall of the side pressure plate. Therefore, when the packaging bag is compacted by the longitudinal pressure plate and the side pressure plate, the bag opening is located on the rear side of 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 material, and the elasticity of the sealing strip is greater than the elasticity of the sealing pad.

[0023] Through the above solution, the elasticity of the closing strip is greater than the elasticity of the sealing pad, so that the closing strip can be easily deformed adaptively after being fitted with the air extraction strip.

[0024] Preferably, the heat sealing plate comprises an upper sealing plate and a lower sealing plate, wherein the upper sealing plate and the lower sealing plate are respectively connected to the front ends of the top plate and the bottom plate, a clamping block is connected to the lower side array of the upper sealing plate, and a slot is formed in the upper surface array of the lower sealing plate, and the clamping block is gap-matched with the slot.

[0025] Through the above scheme, the clearance between the card block and the notch cooperates to facilitate the connection of the packaging bag with the card block and the notch. At the same time, the mutual cooperation between the card block and the notch can form a concave-convex texture on the surface of the packaging bag, thereby improving the sealing effect of the packaging bag.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention solves the problem that when vacuum packaging circuit boards, the edges of the circuit boards are prone to cause damage to the packaging bag under high negative pressure, resulting in poor sealing effect and thus affecting the quality of the circuit boards. By providing an adjustment component, the adjustment component drives the vacuum strip to rotate in the packaging bag to the outside of the edge of the circuit board, so that the vacuum strip opens the packaging bag, and the sealing component seals the bag opening along the vacuum strip. When vacuuming, the vacuum strip forms a support in the packaging bag, which changes the position of the side margin of the packaging bag, thereby avoiding the upper and lower 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-packaged circuit boards.

[0028] 2. By setting an adjustment component, when the motor drives the mounting wheel to rotate, it will also drive the vacuum strip to rotate. Since the vacuum strip is away from the axis of the mounting wheel, the distance between two adjacent vacuum strips after rotation increases, thereby achieving the purpose of propping up the packaging bag. By rotating the vacuum strip to the edge of the circuit board, the packaging bag is supported during vacuuming, so that the excess of the 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, thereby achieving the purpose of further improving the quality of packaged circuit boards.

[0029] 3. By setting up a closing component, the longitudinal pressure plate and the side pressure plate will drive the card plate to move when they are close to the packaging bag. During the movement of the card plate, the protrusions will drive the side plates to squeeze the side plates, so that the side plates drive the vacuum strips to move through the movement of the slider, and the slider is pushed to reset by the spring, thereby realizing a cycle of relaxation to pulling to relaxation to pulling at the mouth of the packaging bag. When the longitudinal pressure plate and the side pressure plate compact the mouth of the packaging bag, the flatness of the mouth of the packaging bag is effectively improved, thereby effectively improving the sealing effect of the longitudinal pressure plate and the side pressure plate, facilitating vacuum extraction, and effectively ensuring the quality of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The effect diagram of the prior art packaging;

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

[0032] Figure 3 It is a structural schematic diagram of the sealing unit part of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the longitudinal movable frame part of the present invention;

[0034] Figure 5 It is a schematic structural diagram of the closed component part of the present invention;

[0035] Figure 6 For the present invention Figure 4 A magnified schematic diagram of point A;

[0036] Figure 7 For the present invention Figure 5 An enlarged schematic diagram of point B;

[0037] Figure 8 It is a structural schematic diagram of the working state of the present invention;

[0038] Fig. 9 It is the effect diagram of the packaging of the present invention.

[0039] In the figure: a, conveying unit; a1, conveyor; a2, belt; b, bag placing unit; c, bagging unit; d, sealing unit; 1, base; 2, bottom plate; 3, pillar; 4, top plate; 5, longitudinal moving frame; 501, longitudinal frame; 502, push rod; 6, transverse moving frame; 601, transverse frame; 602, motor; 603, screw; 7, adjustment component; 701, frame; 702, motor; 703, transmission gear; 704, driven gear; 705, mounting wheel; 7051, wheel body; 7052, limit frame; 7053, slider; 705 4. Side panel; 7055. Spring; 7056. Card plate; 70561. Bump; 8. Exhaust strip; 801. Strip body; 802. Support frame; 803. Exhaust slot; 804. Baffle; 805. Tension spring; 9. Closing assembly; 901. Electric push rod; 902. Longitudinal pressure plate; 903. Electric pull rod; 904. Side pressure plate; 9041. Plate body; 9042. Closing strip; 905. Sealing pad; 10. Heat sealing plate; 1001. Upper sealing plate; 10011. Card block; 1002. Lower sealing plate; 10021. Notch; m. Packaging bag; n. Circuit board. DETAILED DESCRIPTION

[0040] The following is a clear and complete description of the technical solution of the embodiment of the present invention in conjunction with the drawings of the embodiment of the present invention, so that its working state and structural features are more detailed. Obviously, the described embodiment is only a partial embodiment of the present invention, not a complete embodiment. Based on the embodiment of the present invention, other embodiments obtained by ordinary technicians in this field without making any creativity belong to the protection scope of the present invention.

[0041] See also Figures 2 to 9 The present invention provides an automatic bagging vacuum packaging machine, and the technical solution is as follows:

[0042] For details, please refer to Figures 2 to 9, an automatic bagging vacuum packaging machine, including a conveying unit a, a bag swinging unit b, a bagging unit c and a sealing unit d, wherein the bag swinging unit b, the bagging unit c and the sealing unit d are sequentially arranged on the rear side of the conveying unit a from right to left, 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, and the packaging bag m is sleeved on the surface of the circuit board n to be packaged at the left end, the bag swinging unit b is used to move the packaging bag m to the belt a2, and the bagging unit c is used to push the circuit board n into the packaging bag m, the sealing unit d includes a base 1, a bottom plate 2, a pillar 3 and a top plate 4, the bottom plate 2 is connected to the upper side of the base 1, the pillar 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 pillar 3, the sealing unit d also includes a longitudinal moving frame 5, a transverse moving frame 6, an adjustment component 7, and an exhaust strip 8 , closing component 9 and heat sealing plate 10, the longitudinal movable frame 5 is connected to the upper end of the bottom plate 2, the transverse movable frame 6 is connected to the upper end of the longitudinal movable frame 5, the adjusting component 7 is connected to the front end of the transverse movable frame 6, the exhaust strip 8 is connected to the front end of the adjusting component 7, the closing component 9 and the heat sealing plate 10 are both connected between the bottom plate 2 and the top plate 4, the heat sealing plate 10 is located at the front end of the closing component 9, under the successive action of the longitudinal movable frame 5 and the transverse movable frame 6, the adjusting component 7 drives the exhaust strip 8 to move from the center of the packaging bag m to the edge, when the exhaust strip 8 moves to the specified position, the adjusting component 7 drives the exhaust strip 8 to rotate to prop up the packaging bag m along the side edges of the circuit board n, the closing component 9 fits the exhaust strip 8 to seal the packaging bag m, and after the exhaust 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 propping up the packaging bag m. When the vacuum strip 8 is evacuating air, the vacuum strip 8 supports the packaging bag m, so that the remaining amount of the packaging bag m moves from the left and right sides of the package to the edges of the circuit board n, as shown in the figure, thereby reducing the contact between the packaging bag m and the edges of the circuit board n, and effectively avoiding the damage of the packaging bag m under high negative pressure. At the same time, the edges of the circuit board n do not contact the packaging bag m, so that the packaging bag m can withstand greater negative pressure, thereby increasing the amount of air suction during vacuum packaging, and further ensuring the quality of the circuit board n.

[0044] As an embodiment of the present invention, refer to Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9The longitudinal moving frame 5 includes a longitudinal frame 501 and a push rod 502, wherein the longitudinal frame 501 is connected to the upper side of the bottom 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 a power output end. The push rod can push the transverse frame 601 to move forward and backward. 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 a screw 603, and the screw 603 represents The surface thread is divided into different rotation directions along the longitudinal center axis of the horizontal frame 601, so that when the screw 603 rotates, it can drive the two adjustment components 7 to move in different directions. The closing component 9 includes an electric push rod 901, a longitudinal pressure plate 902, an electric pull rod 903 and a side pressure plate 904. The 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 air extraction strip 8. The longitudinal pressure plate 902 is connected to one end of the electric push rod 901 close to the air extraction strip 8. The electric pull rod 903 is connected to the horizontal frame 601. The rear end of the side pressure plate 904 is connected to the power output end of the electric pull rod 903, and the longitudinal pressure plate 902 is an isosceles trapezoid, so when the longitudinal pressure plate 902 closes the bag mouth of the packaging bag m, the side bevel of the longitudinal pressure plate 902 can fit the air extraction strip 8, and the side pressure plate 904 includes a plate body 9041 and a closing strip 9042, and 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, and the plate body 9041 is triangular, and the bevel of the plate body 9041 is parallel to the bevel of the longitudinal pressure plate 902, and then the plate body 9041 and the longitudinal pressure plate 9 02 are in contact, the gap between the plate body 9041 and the longitudinal pressure plate 902 is small, thereby having a good compaction effect on the bag mouth of the packaging bag m, and facilitating vacuuming. The closing strip 9042 is connected to the hypotenuse of the plate body 9041. After the vacuum strip 8 is rotated to a specified angle, the moving trajectory of the closing strip 9042 is in contact with the vacuum strip 8. The specified angle of rotation of the vacuum strip 8 refers to when the side of the vacuum strip 8 is rotated to be parallel to the hypotenuse of the plate body 9041. There are two such positions, and here it refers to the position where the distance between two adjacent vacuum strips 8 is the largest. The closing strip 9042 is made of rubber.

[0045] By setting the longitudinal moving frame 5 and the transverse moving frame 6, the air extraction strip 8 can be placed in the packaging bag m and the packaging bag m is stretched out. In the initial state, the two adjusting components 7 carry the air extraction strip 8 close to each other. At this time, the longitudinal moving frame 5 moves the front end of the air extraction strip 8 to the middle of the rear end of the inner cavity of the packaging bag m through the transverse moving frame 6 and the adjusting component 7. At this time, the transverse moving frame 6 drives the two adjusting components 7 to move to both sides, so that the air extraction strip 8 moves to both sides of the bag opening of the packaging bag m, and then drives the air extraction strip 8 to extend into the packaging bag m through the longitudinal moving frame 5, and the adjusting component 7 The vacuum strip 8 is driven to rotate, so that the vacuum strip 8 opens the bag opening and further supports the packaging bag m. At this time, the longitudinal pressure plate 902 and the side pressure plate 904 fit together to close the bag opening of the packaging bag m. At this time, the vacuum strip 8 draws air. Since the vacuum strip 8 supports the packaging bag m, the remaining amount of the packaging bag m is at the vacuum strip 8. The position of the vacuum strip 8 after rotation is at the edge of the circuit board n, and the remaining amount of the packaging bag m is at the edge of the circuit board n, thereby avoiding the packaging bag m directly covering the edge of the circuit board n, effectively improving the service life of the packaging bag m.

[0046] As an embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9The adjusting assembly 7 includes a frame 701, a motor 702, a transmission gear 703, a driven gear 704 and a mounting wheel 705. The frame 701 is connected to the screw 603, the frame 701 is threadedly connected to the screw 603, the frame 701 is limited by the horizontal frame 601 and can only move left and right, and then 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, the front end of the motor 702 is the power output end, the driven gear 704 is located on the upper side of 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, and a plurality of mounting wheels 705 The mounting wheels 705 are connected to the front ends of the driven gear 704 and the transmission gear 703 respectively, so that when the driven gear 704 and the transmission gear 703 rotate, they can drive the mounting wheels 705 connected thereto to rotate. The transmission ratio of the transmission gear 703 and the driven gear 704 is 1:1, so that the rotation angles of the mounting wheels 705 are consistent, which is convenient for connecting the air extraction strip 8 with the closing component 9. The mounting wheels 705 include a wheel body 7051, a limiting frame 7052, a slider 7053, a side plate 7054, a spring 7055 and a clamping plate 7056. The plurality of wheel bodies 7051 are connected to the front ends of the driven gear 704 and the transmission gear 703 respectively. 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 front ends of the driven gear 704 and the transmission gear 703. The front end of the wheel body 7051 is connected, the slider 7053 is connected to the front end of the limiting frame 7052, the side plates 7054 are connected to both sides of the slider 7053, the side plates 7054 are elastic, one end of the spring 7055 is connected to the slider 7053, the other end of the spring 7055 is connected to the limiting frame 7052, the card plate 7056 is connected to the rear sides of the longitudinal pressure plate 902 and the side pressure plate 904, the surface of the card plate 7056 is connected with a plurality of protrusions 70561, the surface of the protrusions 70561 is arc-shaped, so as to facilitate the side plates 7054 to slide on the surfaces of the protrusions 70561, and the card plate 7056 will contact with the side plates 7054 when moving, thereby pressing the spring 7055 to contract, so as to adjust the air pump strip to 8 positions. The purpose of the arrangement is that when the side plate 7054 is compressed to the moving degree, the side plate 7054 will separate from the protrusion 70561 along the arc surface of the protrusion 70561. When the longitudinal pressure plate 902 and the side pressure plate 904 are both closed, the position of the slider 7053 is affected by the tightening of the packaging bag m and adaptively adjusts its position in the limit frame 7052. The air extraction strip 8 includes a strip body 801, a support frame 802, an air extraction 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. Therefore, when the strip body 801 rotates, the strip body 801 can obtain the maximum rotation amplitude, which is convenient for supporting the packaging bag m.The support frame 802 is triangular in shape, and supports the strip body 801 and the slider 7053 when the longitudinal pressure plate 902 and the side pressure plate 904 compact the packaging bag m. The air extraction groove 803 is opened on the back side of the two strip bodies 801. A baffle 804 is connected to the air extraction groove 803. The front end of the baffle 804 is connected to the tension spring 805. 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 the distance between the side pressure plate 904 and the slider 7053. The distance between the front and rear ends of the plate 904 is such that when the side pressure plate 904 contacts the longitudinal pressure plate 902, the closing strip 9042 contacts the baffle plate 804. The closing strip 9042 is attached to the baffle plate 804 to limit the baffle plate 804, thereby preventing the air extraction groove 803 from connecting the inner cavity of the packaging bag m with the outside world. The surfaces of the longitudinal pressure plate 902 and the side pressure plate 904 are both connected with a sealing pad 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 at the rear wall of the longitudinal pressure plate 902. The sealing strip 9042 is in contact with the baffle 804, and the longitudinal pressure plate 902 can completely compact the packaging bag m, which has a good sealing effect on the packaging bag m. The sealing pad 905 is made of rubber material, so that the sealing pad 905 can be deformed, thereby applying greater pressure to improve the sealing effect. The elasticity of the sealing strip 9042 is greater than that of the sealing pad 905, so that when the sealing strip 9042 contacts the strip body 801, it is convenient for the sealing strip 9042 to be closed. 42 deformation, 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 ends of the top plate 4 and the bottom plate 2, the lower side array of the upper sealing plate 1001 is connected with a block 10011, and the upper surface array of the lower sealing plate 1002 is provided with a notch 10021, the block 10011 and the notch 10021 are gap-matched, and the upper sealing plate 1001 and the lower sealing plate 1002 can both move up and down through electrical control. ,

[0047] By setting the adjustment component 7, the vacuum strip 8 can be driven to rotate through adjustment, so that the vacuum strip 8 props up the packaging bag m, and the closing component 9 allows the packaging bag m to maintain the propped-up state and close the bag mouth. When vacuuming, the remaining amount of the packaging bag m is at the vacuum strip 8, and the vacuum strip 8 is at the edge of the circuit board n, so that the remaining amount of the packaging bag m moves to the edge of the circuit board n, thereby avoiding the friction between the packaging bag m and the circuit board n.

[0048] When the circuit board n is vacuum-packed, the air-exhausting strips 8 are located on both sides of the inner cavity of the packaging bag m. In order to ensure the straightness of the bag opening of the packaging bag m, the air-exhausting strips 8 will move to the left and right to straighten the bag opening of the packaging bag m. When the vacuum is evacuated, the packaging bag m shrinks, and there is a margin on the front and back sides of the packaging bag m. Then, the front and back sides of the packaging bag m can be adaptively deformed and then fit the circuit board n, while the left and right sides of the packaging bag m are held up by the air-exhausting strips 8 and cannot move. In the high negative pressure state, the upper and lower surfaces of the packaging bag m are pressed on the surface of the circuit board n. Figure 1 As described above, the edge of the circuit board n is easy to scratch the packaging bag m. By changing the position of the air extraction bar 8, the air extraction bar 8 is placed at the edge of the circuit board n. When air is extracted, the air extraction bar 8 supports the packaging bag m. After air is extracted, the remaining amount of the packaging bag m moves to the edge of the circuit board n, thereby avoiding direct contact between the bag 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 air extraction strip 8 moves from the middle of the packaging bag m to both sides. By setting the adjustment component 7, the packaging bag m is propped up to adjust the residual position on both sides of the packaging bag m. Specifically, in the initial state, the adjustment component 7 is close to the middle of the screw rod 603. When working, the push rod 502 drives the transverse frame 601 to move forward, so that the air extraction strip 8 moves 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 adjustment components 7 to move outward, and the adjustment component 7 carries the air extraction strip 8. 8 moves outward, and after the adjustment assembly 7 moves to the specified position, the longitudinal moving frame 5 drives the air extraction strip 8 to move forward again through the transverse moving frame 6, so that the air extraction strip 8 moves to the inner cavity of the packaging bag m, and the motor 702 drives the mounting wheel 705 to rotate through the transmission gear 703 and the driven gear 704, and the mounting wheel 705 drives the air extraction strip 8 to rotate around the axis of the mounting wheel 705 through the slider 7053. Since the air extraction strip 8 deviates from the axis of the mounting wheel 705, when the air extraction strip 8 rotates, the distance between adjacent air extraction strips 8 increases, and the air extraction strip 8 rotates to prop up the packaging bag m;

[0050] After the packaging bag m is propped up, the bag mouth of the packaging bag m needs to be closed and then air is evacuated. The longitudinal pressure plate 902 and the side pressure plate 904 are attached to the air extraction strip 8 at the bag mouth of the packaging bag m, thereby achieving sealing of the bag mouth of the packaging bag m. Specifically, the two longitudinal pressure plates 902 are driven to approach and attach to each other by the electric push rod 901, and then the side pressure plate 904 is driven to attach to the longitudinal pressure plate 902 by the electric pull rod 903, thereby achieving sealing of the bag mouth of the packaging bag m.

[0051] The cam 70561 is connected to the surface of the card plate 7056, and the cam 70561 squeezes the side plate 7054 when it moves, so that the side plate 7054 drives the slider 7053 to slide in the limit frame 7052, and the slider 7053 drives the air extraction strip 8 to move, so that the bag mouth is relaxed-tensioned-relaxed-tensioned in sequence. In the tensioned state, the purpose of adjusting the flatness of the bag mouth of the packaging bag m is achieved. In the relaxed state, when the longitudinal pressure plate 902 and the side pressure plate 904 apply pressure to the packaging bag m, the bag mouth of the packaging bag m can be adaptively adjusted, so as to avoid the pulling force on the bag mouth of the packaging bag m by the longitudinal pressure plate 902 and the side pressure plate 904 when compacting, which may cause the bag mouth of the packaging bag m to be damaged.

[0052] After the mouth of the packaging bag m is sealed, the air is extracted through the vacuum strip 8. After the air is extracted, the longitudinal movable frame 5 drives the vacuum strip 8 to move backward and separate from the packaging bag m. At this time, the upper sealing plate 1001 and the lower sealing plate 1002 are combined to heat-seal the packaging bag m.

[0053] Although the embodiments of the present invention have been described, it will be apparent to those skilled in the art that changes and modifications may be made to the embodiments to obtain other effects with an understanding of the principles and spirit of the present invention. The scope of the present 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 placing unit (b), a bagging unit (c) and a sealing unit (d), wherein the conveying unit (a) comprises a conveyor (a1) and a belt (a2), a packaging bag (m) and a circuit board (n) are placed on the surface of the belt (a2), and the sealing unit (d) comprises a base (1), a bottom plate (2), a support (3) and a top plate (4), characterized in that: The sealing unit (d) further comprises a longitudinal movable frame (5), a transverse movable frame (6), an adjusting component (7), an air extraction strip (8), a sealing component (9) and a heat sealing plate (10), wherein the longitudinal movable frame (5) is connected to the upper end of the bottom plate (2), the transverse movable frame (6) is connected to the upper end of the longitudinal movable frame (5), the adjusting component (7) is connected to the front end of the transverse movable frame (6), the air 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 bottom plate. (2) and the top plate (4), under the action of the longitudinal moving frame (5) and the transverse moving frame (6) in sequence, the adjusting component (7) drives the exhaust strip (8) to move from the center of the packaging bag (m) to the edge, and when the exhaust strip (8) moves to the specified position, the adjusting component (7) drives the exhaust strip (8) to rotate to prop up the packaging bag (m) along the side edge of the circuit board (n), and the closing component (9) fits the exhaust strip (8) to close the packaging bag (m), and after the exhaust strip (8) is pulled out, the heat sealing plate (10) solidifies the packaging bag (m).

2. The automatic bagging vacuum packaging machine according to claim 1, characterized in that: The longitudinal moving frame (5) comprises a longitudinal frame (501) and a pushing rod (502), wherein the longitudinal frame (501) is connected to the upper side of the bottom plate (2), and the pushing rod (502) is connected to the longitudinal frame (501). The transverse moving frame (6) comprises a transverse frame (601), a motor (602) and a screw rod (603), wherein the transverse frame (601) is connected to the front end of the pushing 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 rod (603), and the surface thread of the screw rod (603) is divided into different rotation directions along the longitudinal center axis of the transverse frame (601).

3. The automatic bagging vacuum packaging machine according to claim 2, characterized in that: The closing assembly (9) includes an electric push rod (901), a longitudinal pressure plate (902), an electric pull rod (903) and a side pressure plate (904), wherein the plurality of electric push rods (901) are respectively connected to the front ends of the bottom plate (2) and the top plate (4), the longitudinal pressure plate (902) is connected to one end of the electric push rod (901) close to 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), and the longitudinal pressure plate (902) is an isosceles trapezoid.

4. The automatic bagging vacuum packaging machine according to claim 3, characterized in that: The side pressure plate (904) includes a plate body (9041) and a closing strip (9042). The plate body (9041) is connected to the electric pull rod (903). The plate body (9041) is triangular in shape. The hypotenuse of the plate body (9041) is parallel to the hypotenuse of the longitudinal pressure plate (902). The closing strip (9042) is connected to the hypotenuse of the plate body (9041). When the exhaust strip (8) rotates to a specified position, the moving track of the closing strip (9042) contacts the exhaust strip (8). The closing strip (9042) is made of rubber material.

5. The automatic bagging vacuum packaging machine according to claim 4, characterized in that: The adjustment component (7) comprises a frame (701), a motor (702), a transmission gear (703), a driven gear (704) and a mounting wheel (705); the frame (701) is connected to the screw rod (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 on the upper side of 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); and the transmission ratio of the transmission gear (703) and the driven gear (704) is 1:

1.

6. The automatic bagging vacuum packaging machine according to claim 5, characterized in that: The mounting wheel (705) comprises a wheel body (7051), a limiting frame (7052), a slider (7053), a side plate (7054), a spring (7055) and a clamping plate (7056); the plurality of 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 plates (7054) are connected to both sides of the slider (7053), one end of the spring (7055) is connected to the slider (7053), the other end of the spring (7055) is connected to the limit frame (7052), the clamping plate (7056) is connected to the rear sides of the longitudinal pressure plate (902) and the side pressure plate (904), and a plurality of protrusions (70561) are connected to the surface of the clamping plate (7056), and the surface of the protrusions (70561) is arc-shaped.

7. The automatic bagging vacuum packaging machine according to claim 6, characterized in that: The air extraction strip (8) comprises a strip body (801), a support frame (802), an air extraction 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 support frame (802) is triangular; the air extraction groove (803) is provided on the back side of the two strip bodies (801); a baffle (804) is connected to the air extraction groove (803); the front end of the baffle (804) is connected to the tension spring (805); the rear end of the tension spring (805) is connected to the rear end of the air extraction groove (803).

8. The automatic bagging vacuum packaging machine according to claim 7, characterized in that: The distance between the front and rear ends of the longitudinal pressure plate (902) is smaller than the distance between the front and rear ends of the side pressure plate (904), and the surfaces of the longitudinal pressure plate (902) and the side pressure plate (904) are both connected with sealing pads (905). When the longitudinal pressure plate (902) and the side pressure plate (904) are in contact with each other, 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).

9. The automatic bagging vacuum packaging machine according to claim 8, characterized in that: The sealing pad (905) is made of rubber material, and the elasticity of the sealing strip (9042) is greater than the elasticity of the sealing pad (905).

10. The automatic bagging vacuum packaging machine according to claim 9, characterized in that: The heat sealing plate (10) comprises an upper sealing plate (1001) and a lower sealing plate (1002), wherein the upper sealing plate (1001) and the lower sealing plate (1002) are respectively connected to the front ends of the top plate (4) and the bottom plate (2), the lower side array of the upper sealing plate (1001) is connected to a clamping block (10011), and the upper surface array of the lower sealing plate (1002) is provided with a notch (10021), and the clamping block (10011) is clearance-matched with the notch (10021).

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