Miniature compacted tea automatic pressing system

Abstract

The present application belongs to the technical field of tea processing, and relates to a kind of automatic pressing system of micro tight-pressed tea, comprising feeding unit and pressing unit arranged in order from top to bottom;The pressing unit includes mobile forming bin, fixed pressing rod and pressure push rod;Forming cavity is arranged in the mobile forming bin;The fixed pressing rod and pressure push rod are arranged on both sides of forming cavity;The fixed pressing rod and pressure push rod are coaxial and relative motion;The feeding unit is located directly above the forming cavity and is communicated with the inside of forming cavity.The micro tea brick pressed by the present application has consistent thickness, less burrs, high yield, high production efficiency, and small space occupation.

Description

Technical Field

[0001] This invention belongs to the field of tea processing technology and relates to an automated pressing system for miniature compressed tea. Background Technology

[0002] Existing micro-compressed tea pressing equipment typically uses a vibrating hopper combined with a conveyor belt for feeding, with a weighted cloth plate repeatedly rolling to distribute the material. After the tea brick has been held under pressure and shaped (60-120 seconds), a lifting pressure head at the bottom of the forming cavity pushes the tea brick upwards. Then, the tea brick is pushed out by the cloth box or manually using a tea scraper and falls into a stainless steel tray. The shape and weight of the tea brick are then inspected manually, and excess burrs are trimmed. Qualified tea bricks undergo another 30 minutes of holding and shaping before pre-packaging. The transfer of tea bricks is done manually. On the other hand, micro-compressed tea uses raw materials with high tenderness, resulting in denser, smaller tea bricks with rapid surface moisture loss. The pressure and duration of the shaping process both affect the forming effect, requiring high efficiency from the pressing system.

[0003] While existing micro-compression tea pressing systems can achieve the compression and shaping of tea bricks, they have the following problems:

[0004] (1) The power is provided by a hydraulic pump, which is not environmentally friendly, the equipment occupies a lot of space, and there is a waste of resources;

[0005] (2) The thickness of the tea brick is controlled by a preset limit switch. However, the pressing process is in a high-vibration environment, and the limit switch is prone to displacement, resulting in poor reliability of the tea brick thickness and poor tea brick quality. This is mainly manifested in the tea brick thickness being easily variable, inconsistent thickness, many rough edges, and low yield.

[0006] (3) The tea leaves are of different sizes, which makes the weight of the tea leaves in each molding cavity inconsistent, and the thickness of the tea bricks is inconsistent, affecting the yield of tea bricks. When the tea bricks are formed, they are subjected to vertical force from top to bottom. The molding cavity will wear down during long-term use, which will cause the size of the tea bricks to change and the tea bricks to have more rough edges.

[0007] (4) The tea brick forming and pressure setting are completed by the same system. The pressing and forming time is short (20-30s), while the pressure setting time is long (60-200s). After the pressing and forming process, it is necessary to wait for the pressure setting process to finish, resulting in low production efficiency. Summary of the Invention

[0008] To address the technical problems of existing micro-compressed tea pressing equipment, such as large space occupation, low production efficiency, and poor tea brick quality, this invention provides an automated micro-compressed tea pressing system.

[0009] To achieve the above objectives, the present invention highly integrates the pressing unit and the transfer unit, resulting in micro tea bricks with uniform thickness, fewer rough edges, high yield, high production efficiency, and a small system footprint.

[0010] The specific solution of the present invention is as follows:

[0011] An automated micro-compressed tea pressing system includes a feeding unit and a pressing unit arranged sequentially from top to bottom; the pressing unit includes a movable forming hopper, a fixed pressing rod, and a pressure push rod; a forming cavity is provided inside the movable forming hopper; the fixed pressing rod and the pressure push rod are arranged on both sides of the forming cavity; the fixed pressing rod and the pressure push rod are coaxial and move relative to each other; the feeding unit is located directly above the forming cavity and communicates with the inside of the forming cavity.

[0012] Furthermore, the pressing unit also includes a pneumatic hydraulic press; the pneumatic hydraulic press drives the pressure push rod to move.

[0013] Furthermore, the pressing unit also includes an opening cylinder; the opening cylinder pushes the movable forming hopper to move towards the pressure push rod.

[0014] Further specifying, the pressing unit also includes a cover pusher and a discharge pusher; the cover pusher is located near the pneumatic hydraulic press; the discharge pusher is located near the fixed pressing rod; the movable forming hopper is respectively provided with a discharge port and a dropping port; the length direction of the dropping port is parallel to the length direction of the forming cavity, the length direction of the discharge port is perpendicular to the length direction of the forming cavity, the cover pusher is located above the dropping port, and the discharge pusher is located directly above the discharge port; the feeding unit is connected to the dropping port.

[0015] Further defined, there are multiple fixed pressure rods, pressure push rods, and forming cavities, and each fixed pressure rod, forming cavity, and pressure push rod is arranged in a one-to-one correspondence; multiple forming cavities are arranged sequentially in the movable forming hopper; the pneumatic hydraulic press simultaneously drives multiple pressure push rods to move.

[0016] Further defined, the feeding unit includes a feeding pipe, a feeding hopper and a movable hopper connected in sequence from top to bottom; the movable hopper is located directly above the discharge port and is connected to the discharge port.

[0017] Furthermore, the automated micro-compressed tea pressing system also includes a feeding transition chamber placed between the moving hopper and the forming cavity.

[0018] Further specified, there are multiple feeding units; the number of feeding units is half the number of forming cavities, and there are multiple feeding transition chambers, which are equal to the number of forming cavities.

[0019] Furthermore, the automated micro-compressed tea pressing system also includes a transfer unit located below the pressing unit, the transfer unit including a discharge conveyor, and the mobile forming hopper located directly above the discharge conveyor.

[0020] Furthermore, the automated micro-compressed tea pressing system also includes a frame, on which the feeding unit, pressing unit, and transfer unit are all placed.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are:

[0022] 1. In this invention, a forming cavity is set in a movable forming hopper, and a fixed pressing rod and a pressure push rod are arranged on both sides of the forming cavity. The pressure push rod pushes the tea raw material in the forming cavity forward toward the fixed pressing rod. When the tea brick is formed, it is subjected to force in the horizontal direction, so the tea brick is not easily deformed, has fewer rough edges, and has a high yield.

[0023] 2. In this invention, a cover pusher is provided above the forming cavity to prevent the tea raw material from being squeezed out of the forming cavity by horizontal force. At the same time, the tea raw material is also subjected to pressure applied from top to bottom in the vertical direction, thereby improving the forming efficiency of tea bricks.

[0024] 3. In this invention, the pressing unit is powered by a pneumatic hydraulic press, which is clean and environmentally friendly, has a simple process, is applicable to all grades of raw materials, facilitates automated operation of the equipment, and has strong industrial application and promotion potential.

[0025] 4. This invention highly integrates the pressing unit and the transfer unit, resulting in high production efficiency. The pressure of pressing the tea brick is controlled by a preset pressure sensor, which minimizes pressure fluctuations, has high sensitivity, and is less prone to displacement in high-vibration environments. It ensures uniform force distribution and consistent and controllable tea brick thickness. The system is highly reliable and occupies little space.

[0026] 5. This invention features automatic high-frequency vibration feeding of raw materials, achieving high precision and a tea brick forming speed of 78-80 bricks / minute (5g).

[0027] 6. The pressing system of this invention is highly intelligent and automated, which ensures high consistency in the quality of tea bricks while improving production efficiency, providing higher hygiene and safety guarantees, and increasing personal safety protection. Attached Figure Description

[0028] Figure 1 A three-dimensional schematic diagram of the automated pressing system provided by the present invention;

[0029] Figure 2 This is a front view schematic diagram of the automated pressing system provided by the present invention;

[0030] Figure 3 A schematic diagram of the pressing unit and the transfer unit provided by the present invention;

[0031] Figure 4 This is a schematic diagram of the pressing unit and the discharge unit provided by the present invention;

[0032] Figure 5 This is a schematic diagram of the material distribution unit and the material feeding unit provided by the present invention;

[0033] in:

[0034] 1—Frame; 2—Moving door; 3—Distribution unit; 4—Feeding unit; 5—Pressing unit; 6—Transfer unit; 7—Feeding bin; 8—Electronic scale; 9—Forming cavity; 10—Feeding pipe; 11—Feeding transition bin; 12—Discharge conveyor; 13—Discharge push rod; 14—Pneumatic hydraulic press; 15—Opening cylinder; 16—Support frame; 17—Pressure push rod; 18—Fixed pressing rod; 19—Moving forming bin; 20—Cover push rod; 21—Hopper; 22—Feeding hopper; 23—Moving bin; 24—Discharge port; 25—Drop port; 26—Fixed seat; 27—Fixed bracket. Detailed Implementation

[0035] The technical solution protected by the present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "left," "right," "front," and "back," as used in this application, are only used to indicate relative positional relationships and the direction of movement of components. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. Terms such as "including" or "comprising" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0037] See Figure 1-2 A miniature compressed tea automated pressing system includes a frame 1 and a material distribution unit 3, a feeding unit 4, a pressing unit 5 and a transfer unit 6 disposed on the frame 1.

[0038] The frame 1 is a cuboid frame structure with movable doors 2 on the side walls for easy opening. Four omnidirectional casters are installed at the four corners of the bottom of the frame 1 for easy movement.

[0039] See Figure 5 The material distribution unit 3 is located above the feeding unit 4. The material distribution unit 3 includes a hopper 21, which is connected to the feeding unit 4 below.

[0040] The feeding unit 4 includes a feeding pipe 10, a feeding hopper 22, and a movable hopper 23 connected vertically. The movable hopper 23 is located above and connected to the forming cavity 9, facilitating the falling of tea raw materials into the forming cavity 9. The function of the movable hopper 23 is to facilitate the transport of the weighed tea raw materials to the lower transition hopper 11.

[0041] The feeding unit 4 also includes a feeding bin 7 disposed between the feeding hopper 22 and the movable hopper 23. A feeding transition bin 11 is also disposed between the movable hopper 23 and the forming cavity 9.

[0042] There are multiple feeding units 4, the same number as the forming cavities 9. Each feeding unit adds the amount of tea raw material for one tea brick to the corresponding forming cavity 9. At this time, there are multiple feeding transition chambers 11, the same number as the forming cavities 9, and they are arranged vertically in correspondence. After steaming, the tea raw material enters the feeding pipe 10 from the hopper 21, falls through the upper hopper 22, is weighed by an automatic weighing device, and then enters the feeding chamber 7. The weighed tea raw material then falls into the forming cavity 9 below through the moving hopper 23 and the feeding transition chamber 11 in sequence.

[0043] Preferably, the number of feeding units 4 is half the number of forming cavities 9, and two adjacent forming cavities 9 share one feeding unit 4. At this time, the moving hopper 23 is controlled by a reciprocating drive device to circulate reciprocally above two adjacent feeding transition hoppers 11. The moving hopper 23 delivers the amount of tea raw material for one tea brick into the feeding transition hopper 11 at a time, and then further falls into the forming cavity 9 below. That is, the tea raw material is delivered to the two forming cavities 9 through the reciprocating motion of the feeding transition hopper 11, and the moving hopper 23 delivers the tea raw material to the two forming cavities 9 through the reciprocating motion.

[0044] See Figure 5 In practice, there are four feeding units 4. The hopper 21 is connected to the four feeding pipes 10 respectively. Each feeding pipe 10 is equipped with a feeding hopper 22. After steaming, the tea raw materials enter the four feeding pipes 10 from the hopper 21 and fall through the feeding hopper 22. The automatic weighing device weighs the tea raw materials and then they enter the feeding bin 7 and the moving bin 23 in sequence. The moving bin 23 conveys the amount of tea raw materials of one tea brick into one of the two feeding transition bins 11 below it at a time. Then the moving bin 23 repeats the cycle and conveys the amount of tea raw materials of another tea brick into the other of the two feeding transition bins 11 below it. The tea raw materials falling into the feeding transition bin 11 then fall further into the forming cavity 9 below. The moving bin 23 conveys the tea raw materials to the two forming cavities 9 through reciprocating motion.

[0045] In practice, the automatic weighing device includes an electronic scale 8 and a feeding plate located at the bottom of the automatic weighing device. After the weight of the tea raw material reaches the set value, the automatic weighing device controls and opens the feeding plate, and the tea raw material falls evenly into the feeding hopper 7 directly below the feeding unit.

[0046] The pressing unit 5 includes a movable molding hopper 19, a fixed pressing rod 18, and a pressure push rod 17; a molding cavity 9 is provided inside the movable molding hopper 19; the fixed pressing rod 18 and the pressure push rod 17 are arranged on both sides of the molding cavity 9; the fixed pressing rod 18 and the pressure push rod 17 are coaxial and move relative to each other; the feeding unit 4 is located directly above the molding cavity 9 and communicates with the inside of the molding cavity 9.

[0047] See Figure 3 and Figure 4 The mobile molding hopper 19 is a rectangular box with openings on both sides. Multiple molding cavities 9 are arranged in parallel along the length of the mobile molding hopper 19. The mobile molding hopper 19 is provided with a discharge port 24 and a drop port 25. The length of the drop port 25 is parallel to the length of the molding cavity 9, and the length of the discharge port 24 is perpendicular to the length of the molding cavity 9. The cover push rod 20 is located above the drop port 25, and the discharge push rod 13 is located directly above the discharge port 24. The feeding unit 4 is connected to the drop port 25.

[0048] In practice, a support frame 16 is installed on the bottom surface of the inner frame 1, the discharge conveyor 12 is placed on the support frame 16, and the pressing unit 5 is placed entirely on the support frame 16 and above the discharge conveyor 12. For easy fixing, a fixed seat 26 is installed on the support frame 16, the movable forming hopper 19 is placed on the fixed seat 26, the fixed bracket 27 is placed on the support frame 16 and above the fixed seat 26, one end of the fixed pressing rod 18 is fixed to the fixed seat 26, and the cover push rod 20 and the discharge push rod 13 are fixed to the fixed bracket 27.

[0049] When the fixed pressure rod 18 is located on the left side of the length direction of the movable molding hopper 19 and the pressure push rod 17 is located on the right side of the length direction of the movable molding hopper 19, the discharge port 24 is located on the left side of the upper surface of the movable molding hopper 19, and the length direction of the discharge port 24 is consistent with the width direction of the molding cavity 9. The discharge push rod 13 is located directly above the discharge port 24. The dropping port 25 is located on the right side of the upper surface of the movable molding hopper 19, and the length direction of the dropping port 25 is consistent with the length direction of the molding cavity 9. The cover push rod 20 is located above the dropping port 25.

[0050] The material outlet 25 is elongated and the same size as the forming cavity 9. A mold cavity is formed between the left end of the material outlet 25 and the right end of the material outlet 24. The mold cavity is closed at the top and bottom and is rectangular in shape with a dimension of 25mm. * 25mm * 45mm.

[0051] The pressing unit 5 also includes a pneumatic hydraulic press 14; the pneumatic hydraulic press 14 drives the pressure push rod 17 to move.

[0052] The pressing unit 5 also includes an opening cylinder 15; the opening cylinder 15 pushes the movable forming hopper 19 to move towards the pressure push rod 17.

[0053] There are multiple forming cavities 9, which are arranged sequentially within the movable forming hopper 19. In practice, the number of forming cavities 9 and the number of feeding units 4 are designed based on the system's production efficiency and the actual quantity of tea leaves to be pressed.

[0054] Preferably, in this embodiment, there are eight forming cavities 9, arranged in parallel along the length of the movable forming hopper 19. There are four feeding units 4 and four movable hoppers 23. The movable hoppers 23 convey tea raw materials to two forming cavities 9 through reciprocating motion. There are eight discharge ports 25, each corresponding to a forming cavity 9 within the movable forming hopper 19. Since there are eight forming cavities 9, there are also eight fixed pressing rods 18 and eight pressure push rods 17. The eight forming cavities 9 are arranged in parallel, with one fixed pressing rod 18 on the left side of each forming cavity 9 and one pressure push rod 17 on the right side of each forming cavity 9.

[0055] A micro-compressed tea automated pressing system also includes a transfer unit 6 located below the pressing unit 5. The transfer unit 6 includes a discharge conveyor 12, and the forming cavity 9 is located directly above the discharge conveyor 12.

[0056] This invention discloses a miniature automated tea pressing system, the working process of which is as follows:

[0057] When the tea brick pressing begins, the pneumatic hydraulic press 14 is initially in its initial position. The pneumatic hydraulic press 14 drives the pressure push rod 17 to the far right of the movable forming hopper 19. After steaming, the tea raw material enters the four feeding pipes 10 from the hopper 21, falls through the upper hopper 22, and is weighed by the automatic weighing device. The tea raw material then enters the feeding hopper 7, and then falls through the movable hopper 23 and the feeding transition hopper 11 to the bottom and enters the eight forming cavities 9 through the discharge port 25. Then the pneumatic hydraulic press 14 starts working and drives the eight pressure push rods 17 to move and extend into the eight forming cavities 9 respectively. The pressure push rods 17 push and squeeze the tea raw material to the left in the forming cavity 9. The tea raw material in the forming cavity 9 is covered by the cover push rod 20. The cover push rod 20 prevents the tea raw material from being squeezed out of the forming cavity 9 by horizontal force. The pneumatic hydraulic press 14 continuously drives the pressure push rods 17 until the tea raw material is squeezed and pushed into the mold cavity, and the pressure push rod 17 is located on the right side of the mold cavity. At this time, one end of the fixed pressure rod 18 has extended into the forming cavity 9 from the left and passed through the discharge port 24 and is located on the left side of the mold cavity. Because the top and bottom of the mold cavity are sealed, the left fixed pressure rod 18 and the right pressure push rod 17 work together to squeeze and press the tea raw material. The dual pressure makes the tea raw material press and form in the mold cavity according to the specified thickness. The pressing pressure is controlled by a preset pressure sensor. The pressure value changes little and the force is uniform, ensuring that the thickness of the tea brick is uniform and controllable. Because the tea brick is subjected to force in the horizontal direction when it is formed, the tea brick is not easy to deform, has few rough edges, and has a high yield.

[0058] After the tea brick is pressed, the opening cylinder 15 drags the moving forming hopper 19 to the right. At this time, the fixed pressing rod 18 and the pressure push rod 17 press down on the formed tea brick, keeping the tea brick in place. The moving forming hopper 19 moves to the right relative to the tea brick until the discharge port 24 on the moving forming hopper 19 moves directly below the tea brick and is located directly below the discharge push rod 13. The discharge push rod 13 moves downward and extends into the discharge port 24, pushing out the pressed tea brick and placing it on the discharge conveyor belt 12. The opening cylinder 15 then drags the moving forming hopper 19 to the left, and both the discharge push rod 13 and the moving forming hopper 19 return to their initial positions. After the tea brick is discharged, the transfer unit uses a motor-controlled conveyor belt for transport. The transfer unit can also be connected to a packaging machine for pre-packaging of tea bricks.

[0059] The embodiments described above are only a part of the specific implementation methods of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A miniature compressed tea automated pressing system, characterized in that, It includes a feeding unit (4) and a pressing unit (5) arranged sequentially from top to bottom; The pressing unit (5) includes a movable molding hopper (19), a fixed pressing rod (18), and a pressure push rod (17); the movable molding hopper (19) is provided with a molding cavity (9); the fixed pressing rod (18) and the pressure push rod (17) are arranged on both sides of the molding cavity (9); the fixed pressing rod (18) and the pressure push rod (17) are coaxial and move relative to each other; the feeding unit (4) is located directly above the molding cavity (9) and communicates with the inside of the molding cavity (9); The pressing unit (5) also includes a pneumatic hydraulic press (14); the pneumatic hydraulic press (14) drives the pressure push rod (17) to move; The pressing unit (5) further includes a cover push rod (20) and a discharge push rod (13); the cover push rod (20) is located near the pneumatic hydraulic press (14); the discharge push rod (13) is located near the fixed pressing rod (18); the movable forming hopper (19) is provided with a discharge port (24) and a drop port (25); the length direction of the drop port (25) is parallel to the length direction of the forming cavity (9), the length direction of the discharge port (24) is perpendicular to the length direction of the forming cavity (9), the cover push rod (20) is located above the drop port (25), and the discharge push rod (13) is located directly above the discharge port (24); the feeding unit (4) is connected to the drop port (25); A fixed seat (26) is provided on the support frame (16), the movable molding hopper (19) is placed on the fixed seat (26), the fixed bracket (27) is placed on the support frame (16) and located above the fixed seat (26), one end of the fixed pressing rod (18) is fixed on the fixed seat (26), and the cover push rod (20) and the discharge push rod (13) are fixed on the fixed bracket (27); The pressing unit (5) also includes an opening cylinder (15); the opening cylinder (15) pushes the movable forming hopper (19) to move toward the pressure push rod (17); There are multiple fixed pressure rods (18), pressure push rods (17) and forming cavities (9), and the fixed pressure rods (18), forming cavities (9) and pressure push rods (17) are arranged in a one-to-one correspondence; multiple forming cavities (9) are arranged sequentially in the movable forming hopper (19); the pneumatic hydraulic press (14) simultaneously drives multiple pressure push rods (17) to move.

2. The automated micro-compressed tea pressing system according to claim 1, characterized in that, The feeding unit (4) includes a feeding pipe (10), a feeding hopper (22) and a moving hopper (23) connected in sequence from top to bottom; the moving hopper (23) is located directly above the discharge port (25) and is connected to the discharge port (25).

3. The automated micro-compressed tea pressing system according to claim 2, characterized in that, The automated pressing system for micro-compressed tea also includes a feeding transition chamber (11) placed between the movable hopper (23) and the forming cavity (9).

4. The automated micro-compressed tea pressing system according to claim 3, characterized in that, There are multiple feeding units (4); the number of feeding units (4) is half the number of forming cavities (9), and there are multiple feeding transition chambers (11) and the number of feeding cavities (9) is equal to that of forming cavities (9).

5. The automated micro-compressed tea pressing system according to any one of claims 1-4, characterized in that, The automated pressing system for micro-compressed tea also includes a transfer unit (6) located below the pressing unit (5). The transfer unit (6) includes a discharge conveyor (12), and the mobile forming hopper (19) is located directly above the discharge conveyor (12).

6. The automated micro-compressed tea pressing system according to claim 5, characterized in that, The automated pressing system for miniature compressed tea also includes a frame (1), on which the feeding unit (4), pressing unit (5) and transfer unit (6) are all placed.

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