An automatic black tea packaging device and method

Abstract

The present application relates to the technical field of automatic packaging equipment, and provides a black tea automatic packaging equipment and method, which comprises a rack, and further comprises: a diagonal desktop installed on the top of the rack; a packaging bag composed of continuously arranged packaging bags connected through a tearable line, and the packaging bag is arranged at the front end of the top of the diagonal desktop; a conveying assembly installed at the front end of the top of the diagonal desktop, used for realizing continuous feeding of the packaging bag and inhibiting position deviation in the conveying process; an extension table installed at the middle of the front end of the diagonal desktop; a cylinder is installed in the middle of the extension table, a supporting arm is fixedly installed at the telescopic end of the cylinder, an adjusting rod is slidably arranged at the top of the supporting arm, and an inverted L-shaped plate frame is installed at the top of the adjusting rod. When the present application is used, the tea brick is accurately guided into the middle of the bag through dynamic constraint, the air retention in the bag can be reduced and the air extraction path can be shortened without fully opening the bag opening, and meanwhile, the bag body is prevented from shrinking and extruding to damage the integrity of the tea brick during air extraction.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic packaging equipment, and more particularly to an automatic packaging device and method for dark tea. Background Art

[0002] Black teas such as Pu'er tea and Anhua black tea are post-fermented teas, usually in the form of compressed teas such as Fu brick tea and black brick tea. Their block or brick-like structure is characterized by high density and large volume, so the compactness must be strictly maintained during the packaging process to avoid breakage. At the same time, black tea is prone to moisture absorption and deterioration during storage, and needs to be sealed to isolate it from air and moisture. In addition, due to its unique fermentation process and long-term storage requirements, the current mainstream packaging process uses a combination of compressed tea, vacuum aluminum foil bags and outer boxes to ensure the quality of black tea.

[0003] In the traditional tea packaging process, tea bricks, as compressed tea products, need to be pre-expanded in the packaging bag to ensure that the tea bricks can be loaded smoothly. However, the existing packaging bags are fully expanded, resulting in a large amount of air in the bag and a long exhaust path, which makes the vacuum take a long time. Moreover, when the packaging bag is fully expanded and exhausted, the pressure generated by the contraction of the bag acts directly on the tea bricks, which can easily cause the tea bricks to shift, and then lead to local extrusion, breakage and falling of residues, destroying the integrity of the tea bricks. The breakage problem is particularly prominent for tea bricks with uneven density or brittle texture.

[0004] To this end, the present application proposes an automatic packaging device and method for dark tea to solve the above problems. Summary of the Invention

[0005] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of the present invention is to provide an automatic packaging device and method for black tea, which solves the problems that the packaging bag of tea bricks needs to be fully unfolded, resulting in a large amount of air in the bag, a long air extraction path and a long vacuum time, as well as the problem that the tea bricks are shifted, broken and dropped due to the shrinkage and squeezing of the packaging bag when fully unfolded for air extraction.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic packaging device for black tea, comprising a frame, and also comprising: an inclined table mounted on the top of the frame; a packaging bag, which is composed of continuously arranged packaging bags connected by tear lines, and the packaging bag is arranged at the front of the top of the inclined table; a conveying assembly, which is mounted at the front of the top of the inclined table, and is used to achieve continuous feeding of the packaging bag and suppress positional deviation during the conveying process; an extension table, which is mounted at the middle of the front end of the inclined table; a cylinder is mounted in the middle of the extension table, and a support arm is fixedly mounted at the telescopic end of the cylinder An adjusting rod is sliding on the top of the support arm, and an inverted L-shaped plate frame is installed on the top of the adjusting rod. Expanding pressure plates are symmetrically arranged on the left and right sides of the bottom of the inverted L-shaped plate frame; an air bag is installed on the inner side of the expanding pressure plate, and a pressure roller shaft is rotatably installed on the outward side of the expanding pressure plate, and its bottom is also covered with an elastic veneer pad; a driving assembly is installed on the inverted L-shaped plate frame, and is used to drive the two expanding pressure plates to rotate and adjust the angle; an exhaust assembly is installed in the middle of the top of the inclined table top, and a feeding assembly is installed at the rear of the top of the inclined table top, and the exhaust assembly and the feeding assembly are coaxially distributed.

[0007] In a new embodiment, the conveying assembly includes: flat rollers, which are symmetrically mounted on the left and right front parts of the inclined table top; fixed rollers, which are mounted on the left and right middle and rear parts of the top of the inclined table top; slide grooves, which are opened in the left and right front and middle parts of the top of the inclined table top, and a movable roller platform slides in the slide groove, and a limiting pressure plate is installed on the inner side of the movable roller platform; two electric telescopic rods are provided, which are respectively installed on the left and right sides of the bottom end of the inclined table top; a linkage plate is provided at the bottom of the inclined table top, and movable roller platforms are installed on the left and right sides of the top end of the linkage plate, and the left and right sides of the rear end of the linkage plate are respectively fixedly connected to the telescopic ends of the two electric telescopic rods.

[0008] In a new embodiment, a spherical groove is provided in the middle of the top end of the adjusting rod, a ball threaded column slides in the spherical groove, and the ball threaded column is fixed to the rear end of the top end of the support arm by bolts.

[0009] In a new embodiment, the driving assembly includes: a driving motor, which is installed on the top of the inverted L-shaped plate frame; two central shafts are provided, which are rotatably installed on the left and right sides of the bottom of the inverted L-shaped plate frame, and gears are installed on the upper part of the central shaft, and the two gears are meshed with each other, and an expansion pressure plate is fixedly installed on the lower part of the central shaft; the output end of the driving motor is fixedly connected to the top of one of the central shafts.

[0010] In a new embodiment, the vacuum assembly includes: a mounting frame, installed at the rear middle part of the top of the inclined table top, and located between two fixed rollers; a hydraulic rod, installed at the front part of the top of the mounting frame; a vacuum chamber cover is fixedly installed at the telescopic end of the hydraulic rod, and an adsorption strip 1 is fixedly installed at the rear end of the vacuum chamber cover; a vacuum pump, installed at the rear end of the bottom end of the inclined table top, and the vacuum pump is provided with two vacuum ports, one of which is connected to the adsorption strip 1 through a pipeline.

[0011] In a new embodiment, the vacuum assembly also includes: a double-headed solenoid valve, installed on the other vacuum port; a vacuum chamber base, installed in the middle of the inclined table top; adsorption strip 2, installed at the rear of the vacuum chamber base, and adsorption strip 2 is also installed in the middle of the inclined table top; one of the valve ports of the double-headed solenoid valve is connected to the vacuum chamber base through a pipeline, and the other valve port is connected to adsorption strip 2 through a pipeline.

[0012] In a new embodiment, the feeding assembly includes: a conveying channel, which is installed at the rear top of the inclined table top, and the conveying channel passes through the bottom of the mounting frame; two conveyor belts are provided, which are respectively installed on the left and right inner walls of the conveying channel, and the belt surface of the conveyor belt is equidistantly installed with isolation strips; a discharge port, which is installed in the middle of the bottom end of the conveying channel, and flexible guide plates are installed on the left and right inner walls of the discharge port.

[0013] A method for automatically packaging dark tea comprises the following steps:

[0014] S1. Continuous packaging bags are aligned and conveyed to the front of the top of the inclined table through the conveyor assembly. For packaging bags conveyed to the center, the length of the inverted L-shaped plate rack is manually adjusted using an adjustment rod so that the initial angle of the two unfolding pressing plates on the inverted L-shaped plate rack is located in the middle of the packaging bag. The cylinder is then lowered so that the two unfolding pressing plates are pressed firmly on the packaging bag.

[0015] S2. The vacuum assembly is activated. The upper suction bar 1 sucks the upper edge of the bag opening, and the lower suction bar 2 sucks the lower edge of the bag opening. The suction bar 1 rises and lifts the bag opening to the middle area in one direction, completing the bag opening operation;

[0016] S3: The conveying assembly evenly conveys the tea bricks and drops the tea bricks transported to the middle area. The tea bricks are guided by the conveying assembly and the inclined table surface and slide into the packaging bag with the bag opening opened. As the two unfolded pressing plates press the middle position of the packaging bag, the airbag inside them elastically positions and cushions the falling tea bricks.

[0017] S4. Start the vacuum assembly again, move the vacuum chamber cover downward, and close it with the vacuum chamber base, vacuumize and heat-seal the bag opening. Due to the limited expansion range of the bag, shorten the vacuum path;

[0018] S5. Finally, the cylinder is reset, and the pressure of the two unfolding pressure plates on the packaging bag is cancelled. The conveying component drives the packaging bag to move sideways by multiple bag positions until it is off the table top that is inclined to the table top. The operator then collects the bag externally and repeats the above steps until all the tea brick packaging processing is completed.

[0019] Beneficial effects: Compared with the prior art, the advantages of the present invention are: 1. This application constructs dynamic constraints on the positioning of tea bricks, so that the packaging bag can accurately guide the tea bricks to fall into the middle area without being fully unfolded. This not only creates conditions for shortening the path and reducing air residue in the subsequent vacuum process, but also limits the position of the tea bricks to avoid the overall shrinkage of the packaging bag during vacuuming, which will cause squeezing impact on the tea bricks, thereby reducing the risk of tea brick breakage from the source.

[0020] 2. The driving component controls the dynamic adjustment of the angles of the two expansion pressing plates to accurately adapt to the size of the tea bricks. Small tea bricks reduce the angle to limit the expansion of the bag opening, while large tea bricks increase the angle to guide them into the middle of the bag. While reducing the amount of air in the bag, the middle pressure and airbag cushioning prevent the tea bricks from being squeezed, displaced or broken by the packaging bag during vacuuming.

[0021] 3. The airbag inside the unfolding pressure plate absorbs the impact energy of the tea brick through elastic deformation, converting rigid collision into flexible contact, which is suitable for tea bricks of different textures. The outer pressure roller adopts a rolling friction design to reduce movement resistance and ensure smooth movement of the pressure plate. The elastic veneer pad at the bottom enhances the pressing and sealing effect of the unfolding pressure plate, and cooperates with the vacuum component to improve the vacuum efficiency.

[0022] 4. The adjustable limit pressure plate of the conveying component is used to achieve precise feeding and calibration of the packaging bags. The feeding component uses isolation strips to separate the tea bricks, and the flexible guide plate slows down the falling speed, guiding the tea bricks to slide smoothly into the bag opening, reducing impact wear and improving the stability of the packaging process and the accuracy of the blanking.

[0023] 5. After the bag opening is unidirectionally expanded by the adsorption strips 1 and 2 in the vacuum assembly, the tea brick is put in, and the vacuum chamber cover and the base are sealed together. Vacuuming and hot pressing are performed, and the pressing limit of the expansion pressing plate is combined to shorten the vacuum path and form a sealing line at the same time, effectively isolating air and moisture, meeting the long-term storage needs of black tea and improving packaging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure from another perspective of the present invention.

[0026] Figure 3 It is a schematic structural diagram of the conveying component of the present invention.

[0027] Figure 4 It is a schematic diagram of the bottom structure of the inclined desktop of the present invention.

[0028] Figure 5 It is a schematic diagram of the extension platform structure of the present invention.

[0029] Figure 6 It is a schematic diagram of the inverted L-shaped plate frame structure of the present invention.

[0030] Figure 7 Schematic diagram of the drive assembly structure of the present invention.

[0031] Figure 8 It is a schematic diagram of the state of receiving tea bricks at the angle between the two unfolded pressing plates of the present invention.

[0032] Figure 9 It is a schematic structural diagram of the air extraction component of the present invention.

[0033] Figure 10 It is a side view of the exhaust component of the present invention.

[0034] Figure 11 It is a schematic structural diagram of the feeding component of the present invention.

[0035] Figure 12 It is a schematic diagram of the packaging bag structure of the present invention.

[0036] The accompanying drawings are marked as follows: 1. frame; 2. inclined table; 3. packaging bag; 4. conveying assembly; 401. flat roller; 402. fixed roller; 403. slide; 404. movable roller platform; 405. limit pressure plate; 406. electric telescopic rod; 407. linkage plate; 5. extension platform; 6. cylinder; 7. support arm; 8. adjustment rod; 81. spherical groove; 82. ball head threaded column; 9. inverted L-shaped plate frame; 10. unfolding pressure plate; 11. air bag; 12. pressure roller shaft; 13. elastic veneer pad; 1 4. Drive assembly; 141. Drive motor; 142. Center shaft; 143. Gear; 15. Exhaust assembly; 1501. Mounting frame; 1502. Hydraulic rod; 1503. Vacuum chamber cover; 1504. Adsorption bar 1; 1505. Vacuum pump; 1506. Double-headed solenoid valve; 1507. Vacuum chamber base; 1508. Adsorption bar 2; 16. Feeding assembly; 1601. Conveying channel; 1602. Conveyor belt; 1603. Isolation bar; 1604. Discharge port; 1605. Flexible guide plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] The embodiments of the present application provide an automatic packaging device and method for black tea, which solves the problems of tea brick packaging requiring full expansion of the packaging bag, resulting in a large amount of air in the bag, a long vacuum path and a long vacuum time, as well as the problems of tea brick displacement, breakage and falling off due to shrinkage and squeezing of the packaging bag during full expansion and vacuuming. During use, the tea brick is guided accurately into the middle of the bag through dynamic constraints, and the air retention in the bag can be reduced and the vacuum path can be shortened without fully expanding the bag opening, while avoiding the shrinkage and squeezing of the bag during vacuuming to damage the integrity of the tea brick.

[0039] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows.

[0040] Example 1, please refer to Figures 1-12 The embodiment of the present application provides an automatic packaging device for black tea, including a frame 1, and also including: an inclined table top 2, installed on the top of the frame 1; a packaging bag 3, which is composed of continuously arranged packaging bags 3 connected by easy-tear lines, and the packaging bag 3 is arranged at the front of the top of the inclined table top 2; a conveying component 4, installed at the front of the top of the inclined table top 2, for realizing continuous feeding of the packaging bag 3 and suppressing position deviation during the conveying process; an extension table 5, installed at the middle of the front end of the inclined table top 2; a cylinder 6 is installed in the middle of the extension table 5, and a support arm 7 is fixedly installed at the telescopic end of the cylinder 6, and the top of the support arm 7 is adjustable Rod 8, an inverted L-shaped plate frame 9 is installed on the top of the adjusting rod 8, and an unfolding pressure plate 10 is symmetrically arranged on the left and right sides of the bottom of the inverted L-shaped plate frame 9; an air bag 11 is installed on the inner side of the unfolding pressure plate 10, and a pressure roller shaft 12 is rotatably installed on the outward side of the unfolding pressure plate 10, and its bottom is also covered with an elastic veneer pad 13; a driving component 14 is installed on the inverted L-shaped plate frame 9, and is used to drive the two unfolding pressure plates 10 to rotate and adjust the angle; an exhaust component 15 is installed in the middle of the top of the inclined table top 2, and a feeding component 16 is installed at the rear of the top of the inclined table top 2, and the exhaust component 15 and the feeding component 16 are coaxially distributed.

[0041] By setting up an extension platform 5, a cylinder 6, a support arm 7, an adjusting rod 8, an inverted L-shaped plate frame 9, an unfolding pressure plate 10, an airbag 11, a pressure roller shaft 12 and an elastic veneer pad 13, a dynamic constraint on the positioning of the tea brick material is constructed, so that the packaging bag 3 can accurately guide the tea brick to fall into the middle area without being fully unfolded. This design not only creates conditions for shortening the path and reducing air residue in the subsequent vacuum process, but also limits the position of the tea brick to avoid the overall shrinkage of the packaging bag 3 during vacuuming, which causes squeezing impact on the tea brick, thereby reducing the risk of tea brick breakage from the source.

[0042] First, the driving component 14 drives the two unfolding pressing plates 10 to synchronously adjust the angle through the gear 143 meshing structure, and the pressing range can be flexibly adjusted according to the size of the tea brick. For smaller tea bricks, the angle between the two unfolding pressing plates 10 is reduced to limit the unfolding area of ​​the bag opening to avoid excessive expansion resulting in excessive air in the bag. For larger tea bricks, the angle between the two unfolding pressing plates 10 is expanded to allow the tea brick to smoothly enter the middle of the bag opening, ensuring that tea bricks of different specifications can be accurately positioned in the middle area of ​​the packaging bag 3, laying the foundation for subsequent vacuuming and sealing.

[0043] Secondly, when the airbag 11 on the inner side of the unfolded pressing plate 10 presses the packaging bag 3, it fits tightly to the middle of the bag body through elastic deformation to form a flexible positioning structure. When the tea brick falls into the bag, the airbag 11 absorbs the impact energy through elastic buffering to avoid rigid collision between the tea brick and the bag body, effectively reducing the risk of breakage or falling off. It is especially suitable for black tea bricks with brittle texture or uneven density. The elastic supporting effect of the airbag 11 can limit the position of the tea brick in the packaging bag 3, ensuring that it is in the middle area, avoiding local extrusion and damage due to displacement of the tea brick during vacuuming.

[0044] In addition, the pressure roller shaft 12 on the outside of the unfolding pressure plate 10 adopts a rolling friction setting, and its surface is smoothed and rotatably connected to the unfolding pressure plate 10, so that when the unfolding pressure plate 10 adjusts the angle, the unfolding pressure plate 10 can ensure smooth and smooth movement and reduce jamming. At the same time, the elastic veneer pad 13 on the bottom surface of the unfolding pressure plate 10 can better contact and press the bag surface of the packaging bag 3.

[0045] Further, see Figure 3 and Figure 4 The conveying assembly 4 includes: a flat roller 401, which is symmetrically mounted on the left and right front parts of the inclined desktop 2; a fixed roller 402, which is mounted on the middle and rear parts of the left and right sides of the top of the inclined desktop 2; a slide 403, which is opened at the front and middle parts of the left and right sides of the top of the inclined desktop 2, and a movable roller platform 404 slides in the slide 403, and a limiting pressure plate 405 is installed on the inner side of the movable roller platform 404; two electric telescopic rods 406 are provided, which are respectively mounted on the left and right sides of the bottom end of the inclined desktop 2; a linkage plate 407 is set at the bottom of the inclined desktop 2, and a movable roller platform 404 is installed on the left and right sides of the top of the linkage plate 407, and the left and right sides of the rear end of the linkage plate 407 are respectively fixedly connected to the telescopic ends of the two electric telescopic rods 406.

[0046] By arranging the flat roller 401, the fixed roller 402, the slide 403, the movable roller platform 404, the limiting pressure plate 405, the electric telescopic rod 406 and the linkage plate 407, the flat rollers 401 and the fixed rollers 402 on both sides cooperate to realize the continuous feeding and discharging of the packaging bags 3 (it should be noted that the flat roller 401 and the fixed roller 402 have their own driving ends and can be driven and rotated independently). At the same time, the electric telescopic rod 406 can be used to drive the linkage plate 407 to drive the connected movable roller platform 404 and the limiting pressure plate 405 to move laterally (that is, the movable roller platform 404 slides in the slide 403). The limiting spacing can be adjusted according to the length of the packaging bag 3 to suppress its position deviation during the conveying process, ensure that the packaging bag 3 is in the conveying position inclined to the lower side of the top surface of the table 2, reduce equipment debugging time, and improve production efficiency.

[0047] Further, see Figure 5 and Figure 7 A spherical groove 81 is provided in the middle of the top of the adjusting rod 8, and a ball thread column 82 slides in the spherical groove 81. The ball thread column 82 is fixed to the rear of the top of the support arm 7 by bolts.

[0048] By setting the spherical groove 81 and the ball head threaded column 82, the front and rear positions of the inverted L-shaped plate frame 9 are adjusted manually by pulling the adjusting rod 8 so that the initial angles of the two unfolding pressure plates 10 thereon are aligned with the middle of the packaging bag 3. The thread locking of the ball head threaded column 82 is used to lock the position of the adjusting rod 8 with the spherical groove 81, ensuring that the unfolding pressure plate 10 is accurately pressed in the middle of the bag body, avoiding the problem of uneven subsequent bag opening expansion caused by offset and the problem of unsmooth insertion of the tea brick.

[0049] Further, see Figure 7 and Figure 8 The driving assembly 14 includes: a driving motor 141, which is installed on the top of the inverted L-shaped plate frame 9; there are two central shafts 142, which are rotatably installed on the left and right sides of the bottom of the inverted L-shaped plate frame 9, and gears 143 are installed on the upper part of the central shaft 142, and the two gears 143 are meshed and connected to each other. The lower part of the central shaft 142 is fixedly installed with an unfolding pressure plate 10; the output end of the driving motor 141 is fixedly connected to the top of one of the central shafts 142.

[0050] By setting a driving motor 141, a central shaft 142 and a gear 143, the driving motor 141 drives the central shaft 142 to drive the two gears 143 to mesh and rotate, thereby driving the unfolding pressing plates 10 on both sides to rotate synchronously, so as to adjust the size of the angle between the two unfolding pressing plates 10. For example, for smaller tea bricks, the pressing plate angle can be reduced, and for larger tea bricks, the angle can be increased, so as to ensure that the unfolding pressing plate 10 always fits the middle of the top surface of the bag body, and the unfolding range of the packaging bag 3 can be limited, and only the middle area of ​​the bag opening is opened, avoiding the problems of excessive air in the bag and too long exhaust path caused by full unfolding. At the same time, the meshing transmission of the gear 143 ensures that the unfolding pressing plates 10 on both sides move in unison, avoiding uneven force on the bag body caused by lag or offset of the unilateral pressing plate, ensuring that the position of the tea brick is stable when it falls, and reducing the risk of breakage caused by impact. It should be noted that the angle between the two unfolding pressing plates 10 can adapt to the reception and positioning of various types of tea bricks. Taking round and square tea bricks as an example (reference Figure 8 8-1 and 8-2 in the game).

[0051] Example 2, please refer to Figure 9 and Figure 10 The exhaust assembly 15 includes: a mounting frame 1501, which is installed at the rear middle part of the top of the inclined table top 2 and is located between the two fixed rollers 402; a hydraulic rod 1502, which is installed at the front part of the top of the mounting frame 1501; a vacuum chamber cover 1503 is fixedly installed at the telescopic end of the hydraulic rod 1502, and an adsorption strip 1504 is fixedly installed at the rear end of the vacuum chamber cover 1503; a vacuum pump 1505, which is installed at the rear part of the bottom end of the inclined table top 2, and the vacuum pump 1505 is provided with two exhaust ports, one of which is connected to the adsorption strip 1504 through a pipeline.

[0052] Furthermore, the vacuum assembly 15 also includes: a double-headed solenoid valve 1506, installed on the other vacuum port; a vacuum chamber base 1507, installed in the middle of the inclined desktop 2; an adsorption strip 1508, installed at the rear of the vacuum chamber base 1507, and the adsorption strip 1508 is also installed in the middle of the inclined desktop 2; one of the valve ports of the double-headed solenoid valve 1506 is connected to the vacuum chamber base 1507 through a pipeline, and the other valve port is connected to the adsorption strip 1508 through a pipeline.

[0053] By setting the adsorption bar 1504 and the adsorption bar 2 1508, the upper and lower edges of the bag opening of the packaging bag 3 are adsorbed respectively, and then the upward movement of the hydraulic rod 1502 drives the adsorption bar 1504 to lift the upper edge of the bag opening of the packaging bag 3 in one direction;

[0054] By setting the vacuum chamber cover 1503 and the vacuum chamber base 1507, the bag opening of the packaging bag 3 is opened by the adsorption strip 1504 and the adsorption strip 2 1508, and the tea brick is transported into the packaging bag 3 through the feeding assembly 16, and then the hydraulic rod 1502 is lowered to make the vacuum chamber cover 1503 and the vacuum chamber base 1507 cover to form a closed space, and then the vacuum in the packaging bag 3 is extracted by the vacuum pump 1505. It should be noted that the vacuum chamber cover 1503 and the vacuum chamber base 1507 are also provided with heat sealing The mouth structure (not shown in the figure, the specific structure is that two sets of high-precision heating strips are symmetrically embedded in the sealing contact surface of the vacuum chamber cover 1503 and the vacuum chamber base 1507. The heating strips are made of high-temperature resistant materials such as nickel-chromium alloy, and the surface is covered with Teflon coating to prevent the packaging bag 3 from sticking). On the one hand, the sealing cooperation between the vacuum chamber cover 1503 and the vacuum chamber base 1507 ensures a high vacuum degree. On the other hand, the heat sealing process ensures the airtightness of the packaging bag 3, effectively isolating it from air and moisture, and meeting the long-term storage requirements of black tea.

[0055] Among them, the function of the double-headed solenoid valve 1506 is to switch the exhaust path. Stage one provides exhaust for adsorption strip 1 1504 and adsorption strip 2 1508, and stage two provides exhaust for the vacuum chamber base 1507, realizing the vacuum function and exhaust function in the unfolding and sealing stages of the bag opening of the packaging bag 3.

[0056] In summary, by combining the adsorption strip 1 1504 and the adsorption strip 2 1508, as well as the effect of the two unfolding pressing plates 10 pressing the packaging bag 3, only the middle area of ​​the bag opening is opened, so that the air path is short during vacuuming and the vacuum time is significantly reduced (compared with the traditional full-expansion method). At the same time, the contraction pressure of the bag is avoided from directly acting on the tea brick, preventing the tea brick from being crushed due to squeezing.

[0057] To avoid the problems of large amount of air in the bag and long extraction path caused by full expansion, the one-way lifting method can accurately control the expansion range, reduce the friction between the bag and the tea brick, and prevent the tea brick from shifting.

[0058] See also Figure 11 The feeding assembly 16 includes: a conveying channel 1601, which is installed at the rear top of the inclined table 2, and the conveying channel 1601 passes through the bottom of the mounting frame 1501; two conveyor belts 1602 are respectively installed on the left and right inner walls of the conveying channel 1601, and isolation strips 1603 are equidistantly installed on the belt surface of the conveyor belt 1602; a discharge port 1604 is installed in the middle of the bottom end of the conveying channel 1601, and flexible guide plates 1605 are installed on the left and right inner walls of the discharge port 1604.

[0059] By setting up a conveying channel 1601, a conveyor belt 1602, an isolation strip 1603, a discharge port 1604 and a flexible guide plate 1605, the isolation strip 1603 on the surface of the conveyor belt 1602 separates the tea bricks into single units to avoid accumulation, ensuring that only one tea brick is conveyed to the middle area at a time, and cooperates with the guidance of the oblique table top 2 to make the tea bricks slide along the preset path to the bag opening, thereby improving the blanking accuracy. The flexible guide plate 1605 of the discharge port 1604 is made of elastic material to slow down the falling speed of the tea bricks and guide them to enter the bag smoothly. The fallen tea bricks enter the unfolded packaging bag 3, and the air bags 11 on the inner side of the two unfolded pressure plates 10 provide elastic buffering to absorb the impact energy of the tea bricks and avoid the tea bricks from being broken or falling off due to rigid collision. It is especially suitable for tea bricks with uneven density or brittle texture. At the same time, the position of the tea bricks in the packaging bag 3 is limited to ensure that the tea bricks are in the middle position of the packaging bag 3 after subsequent vacuum extraction, thereby improving the packaging effect while also avoiding the tea bricks from being fully squeezed by the packaging bag 3.

[0060] Example 3, please refer to Figures 1-12 The present application also provides an automatic packaging method for dark tea, comprising the following steps:

[0061] S1. Continuous packaging bags 3 are aligned and conveyed to the front of the top of the inclined table 2 by the conveying assembly 4. For the packaging bags 3 conveyed to the center, the length of the inverted L-shaped plate frame 9 is manually adjusted using the adjusting rod 8 so that the initial angle of the two unfolding pressing plates 10 on the inverted L-shaped plate frame 9 is located in the middle of the packaging bags 3. The air cylinder 6 is then lowered so that the two unfolding pressing plates 10 are pressed firmly on the packaging bags 3.

[0062] S2. The vacuum assembly 15 is activated. The upper suction bar 1504 sucks the upper edge of the opening of the packaging bag 3. The lower suction bar 1508 sucks the lower edge of the opening of the packaging bag 3. The suction bar 1504 rises and lifts the bag opening to the middle area in one direction, completing the bag opening operation of the packaging bag 3.

[0063] S3: The feeding assembly 16 evenly conveys the tea bricks and drops the tea bricks transported to the middle area. The tea bricks are guided by the feeding assembly 16 and the inclined table 2 and slide into the packaging bag 3 with the bag opening opened. As the two unfolded pressing plates 10 press the middle position of the packaging bag 3, the airbags 11 inside them elastically position and cushion the falling tea bricks.

[0064] S4. Start the vacuum assembly 15 again, the vacuum chamber cover 1503 moves down and covers the vacuum chamber base 1507, and the bag opening of the packaging bag 3 is vacuumed and heat-sealed. Due to the limited expansion range of the packaging bag 3, the vacuum path is shortened;

[0065] S5. Finally, the air cylinder 6 is reset, and the pressing of the two unfolding pressing plates 10 on the packaging bag 3 is cancelled. The conveying assembly 4 drives the packaging bag 3 to move sideways by multiple bag positions until it is out of the table top inclined to the table top 2. The operator then performs external collection and repeats the above steps until all the tea brick packaging processing is completed.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An automatic packaging device for dark tea, comprising a frame (1), characterized in that: Also includes: An inclined tabletop (2) is mounted on the top of the rack (1); The packaging bag (3) is composed of continuously arranged packaging bags (3) connected by tear lines, and the packaging bag (3) is arranged at the front of the top of the inclined table (2); A conveying assembly (4) is mounted on the front of the top of the inclined table (2) and is used to achieve continuous feeding of the packaging bag (3) and suppress positional deviation during the conveying process; An extension table (5) is mounted on the front middle portion of the inclined table top (2); A cylinder (6) is installed in the middle of the extension platform (5), a support arm (7) is fixedly installed at the telescopic end of the cylinder (6), an adjustment rod (8) is slidably provided on the top of the support arm (7), an inverted L-shaped plate frame (9) is installed on the top of the adjustment rod (8), and an expansion pressure plate (10) is symmetrically provided on the left and right sides of the bottom of the inverted L-shaped plate frame (9); An air bag (11) is installed on the inner side of the unfolding pressure plate (10), and a pressure roller shaft (12) is rotatably installed on the outer side of the unfolding pressure plate (10), and the bottom thereof is also covered with an elastic veneer pad (13); A drive assembly (14) is mounted on the inverted L-shaped plate frame (9) and is used to drive the two unfolding pressing plates (10) to rotate and adjust the included angle; An air extraction component (15) is installed at the middle of the top of the inclined table top (2), and a material delivery component (16) is installed at the rear of the top of the inclined table top (2). The air extraction component (15) and the material delivery component (16) are coaxially distributed.

2. The automatic packaging equipment for dark tea according to claim 1, characterized in that: The conveying assembly (4) comprises: Plane rollers (401) are symmetrically mounted on the left and right front portions of the inclined tabletop (2); A fixed roller (402) is mounted on the left and right sides of the top of the inclined table (2) in the middle and rear parts; A chute (403) is provided at the front center of the left and right sides of the top of the inclined table (2), a movable roller table (404) slides in the chute (403), and a limiting pressure plate (405) is installed on the inner side of the movable roller table (404); Two electric telescopic rods (406) are provided and are respectively installed on the left and right sides of the bottom end of the inclined table top (2); The linkage plate (407) is arranged at the bottom of the inclined table top (2), and the left and right sides of the top of the linkage plate (407) are both installed with movable roller tables (404), and the left and right sides of the rear end of the linkage plate (407) are respectively fixedly connected to the telescopic ends of the two electric telescopic rods (406).

3. The automatic packaging equipment for dark tea according to claim 1, characterized in that: A spherical groove (81) is provided in the middle of the top end of the adjusting rod (8), a ball threaded column (82) slides in the spherical groove (81), and the ball threaded column (82) is fixed to the rear end of the top end of the support arm (7) by means of bolts.

4. The automatic packaging equipment for dark tea according to claim 1, characterized in that: The drive assembly (14) comprises: A drive motor (141) is mounted on top of the inverted L-shaped plate frame (9); Two central shafts (142) are provided, which are rotatably mounted on the left and right sides of the bottom of the inverted L-shaped plate frame (9), and a gear (143) is mounted on the upper portion of each central shaft (142). The two gears (143) are meshed and connected with each other, and an expansion pressure plate (10) is fixedly mounted on the lower portion of each central shaft (142); The output end of the driving motor (141) is fixedly connected to the top end of one of the central shafts (142).

5. The automatic packaging equipment for dark tea according to claim 2, characterized in that: The air extraction component (15) comprises: The mounting frame (1501) is mounted at the top rear center of the inclined table (2) and is located between the two fixed rollers (402); A hydraulic rod (1502) is mounted on the top front portion of the mounting frame (1501); The telescopic end of the hydraulic rod (1502) is fixedly mounted with a vacuum chamber cover (1503), and the rear end of the vacuum chamber cover (1503) is fixedly mounted with an adsorption strip (1504); The vacuum pump (1505) is installed at the rear bottom of the inclined table top (2), and the vacuum pump (1505) is provided with two air extraction ports, one of which is connected to the adsorption strip 1 (1504) through a pipeline.

6. The automatic dark tea packaging equipment according to claim 5, characterized in that: The air extraction component (15) further includes: A double-ended solenoid valve (1506) is installed on the other exhaust port; A vacuum chamber base (1507) is mounted in the middle of the inclined table (2); Adsorption bar 2 (1508) is installed at the rear of the vacuum chamber base (1507), and adsorption bar 2 (1508) is also installed in the middle of the inclined table top (2); One of the valve ports of the double-headed electromagnetic valve (1506) is connected to the vacuum chamber base (1507) via a pipeline, and the other valve port is connected to the second adsorption strip (1508) via a pipeline.

7. The automatic packaging equipment for dark tea according to claim 6, characterized in that: The feeding assembly (16) comprises: A conveying channel (1601) is installed at the rear of the top of the inclined table (2), and the conveying channel (1601) passes through the bottom of the mounting frame (1501); There are two conveyor belts (1602), which are respectively installed on the left and right inner walls of the conveying channel (1601). Isolation strips (1603) are installed at equal intervals on the surface of the conveyor belt (1602); The discharge port (1604) is installed in the middle of the bottom end of the conveying channel (1601), and flexible guide plates (1605) are installed on the left and right inner walls of the discharge port (1604).

8. A method for automatic packaging of dark tea, characterized in that: The automatic packaging equipment for dark tea according to claim 7 comprises the following steps: S1. The continuous packaging bags (3) are calibrated in position by the conveying assembly (4) and conveyed to the front of the top of the inclined table (2). When the packaging bags (3) are conveyed to the central position, the length of the inverted L-shaped plate frame (9) is manually adjusted using the adjusting rod (8) so that the initial angle of the two unfolding pressing plates (10) on the inverted L-shaped plate frame (9) is located in the middle of the packaging bag (3). Then, the cylinder (6) is lowered so that the two unfolding pressing plates (10) are pressed firmly on the packaging bag (3); S2, the vacuum assembly (15) is started, the upper adsorption strip 1 (1504) adsorbs the upper edge of the opening of the packaging bag (3), the lower adsorption strip 2 (1508) adsorbs the lower edge of the opening of the packaging bag (3), and the adsorption strip 1 (1504) rises and lifts the bag opening to the middle area in one direction, completing the bag opening operation of the packaging bag (3); S3, the feeding component (16) uniformly transports the tea bricks and throws the tea bricks transported to the middle area. The tea bricks are guided by the feeding component (16) and the inclined table (2) and slide into the packaging bag (3) with the bag opening opened. As the two unfolded pressing plates (10) press the middle position of the packaging bag (3), the air bag (11) inside the packaging bag elastically positions and cushions the falling tea bricks. S4, the vacuum assembly (15) is started again, the vacuum chamber cover (1503) is moved downward and closed with the vacuum chamber base (1507), and the bag opening of the packaging bag (3) is vacuumed and heat-sealed. Due to the limited expansion range of the packaging bag (3), the vacuum path is shortened; S5. Finally, the air cylinder (6) is reset, and the pressing of the two unfolding pressing plates (10) on the packaging bag (3) is cancelled. The conveying assembly (4) drives the packaging bag (3) to move sideways by multiple bag positions until it is out of the table top of the inclined table top (2). The operator then collects the bags from the outside and repeats the above steps until all the tea bricks are packaged.

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