A swingable tea brick pressing device
By using a dual-axis cylinder control system for the swingable tea brick pressing device, the problem of internal density gradient in tea bricks was solved, achieving consistency in internal density and improving product quality.
Patent Information
- Application Number
- CN202522692638.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-19
AI Technical Summary
The pressing unit of the existing automatic tea brick making machine cannot adjust the pressure to address the uneven micro-distribution of tea raw materials, resulting in density gradient problems inside the tea brick and affecting product quality.
The device employs a swingable tea brick pressing device, which controls two small-area pressing heads through two sets of independent dual-axis cylinders. In conjunction with the controller, it achieves dynamic alternating hammer pressing to ensure uniform pressure transmission.
It achieves uniformity in the internal density of tea bricks, improves product quality, ensures the uniformity and stability of the pressing process, and is highly adaptable and flexible in operation.
Smart Images
Figure CN224936488U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tea machinery, and in particular to a swingable tea brick pressing device. Background Technology
[0002] In the automated production process of compressed teas such as Fu brick tea, the automatic Fu brick tea making machine is the core equipment for achieving high-efficiency and large-scale processing. The performance of the pressing unit (pressing head device) directly determines the forming quality of the tea brick. Currently, most automatic Fu brick tea making machines on the market use a single-pressing-head pneumatic device. This device is typically equipped with a large pressing head whose size matches the pressing surface of the tea brick. During operation, this pressing head presses down as a whole, compacting the tea leaves within the mold in one continuous operation.
[0003] In traditional pressing processes, the tea leaves inevitably exhibit uneven micro-distribution when filled into the mold (e.g., localized differences in particle size and loft). When using a large, single pressure head covering the entire pressing surface, the pressure cannot be precisely adjusted. Densely packed areas of the material bear greater pressure and become overly compacted, while looser areas receive insufficient pressure. This directly results in a density gradient within the processed tea bricks, with some areas being too dense and others too loose, thus reducing product quality. Utility Model Content
[0004] The present invention aims to provide a swingable tea brick pressing device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A swingable tea brick pressing device includes a lifting connecting plate, a support column connected to the lifting connecting plate, a guide plate slidably connected to the support column, a hammer pressing cylinder connected to the guide plate, a pressing head main plate connected to the telescopic end of the hammer pressing cylinder, a dual-axis cylinder connected to the pressing head main plate, two sets of dual-axis cylinders, each set of dual-axis cylinders having a slider connected to its telescopic end, a connecting rod connected to the slider, and two connecting rods connected to a pressing head one and a pressing head two, respectively. Each set of dual-axis cylinders is equipped with a solenoid valve, which controls the extension and retraction of the piston rod of the dual-axis cylinder.
[0006] Preferably, the system also includes a controller, and the solenoid valves of both sets of the dual-axis cylinders are electrically connected to the controller.
[0007] Preferably, the controller is configured to independently control the extension or retraction state of the piston rod of each set of dual-axis cylinders, thereby giving the first and second pressure heads two different horizontal working positions; by controlling the combination of the horizontal working positions of the first and second pressure heads, four different pressing point layouts can be formed.
[0008] Preferably, the pressure head main plate is connected to a guide post, the guide middle plate is connected to a linear bearing, and the guide post and the linear bearing are slidably connected.
[0009] Preferably, the two sets of dual-axis cylinders are mounted horizontally and parallel on the pressure head main plate, and the extension and retraction directions of the piston rods of the two sets of dual-axis cylinders are perpendicular to the movement direction of the piston rod of the hammer-pressing cylinder.
[0010] Preferably, the bottom pressing surfaces of both the first and second pressing heads are provided with anti-slip textures.
[0011] Preferably, the support column is threaded with a nut, which is used to lock and fine-tune the initial height of the guide plate.
[0012] Preferably, the pressure head main board is connected to a limiting plate, the limiting plate has a sliding groove, the slider is T-shaped, and the slider is slidably connected to the sliding groove.
[0013] The beneficial effects of this technical solution compared to existing technologies are as follows: This solution constructs a programmable oscillating pressing system by setting up two independent sets of dual-axis cylinders on the left and right sides, in conjunction with a controller. This system improves upon the traditional single large-area press head covering the entire pressing surface by replacing it with two independently controllable small-area press heads. The controller independently controls the on / off state of the solenoid valves of the two sets of dual-axis cylinders, thereby driving press head one and press head two to continuously switch between their respective left and right working positions. During operation, by controlling the left and right oscillation in coordination with the downward pressing action of the hammer cylinder, press head one and press head two dynamically and alternately hammer different areas of the tea brick surface according to a preset program. This oscillating pressing mode effectively addresses the uneven microscopic distribution of tea raw materials within the mold. By continuously changing the position of the pressing point, the pressure is transmitted more evenly and applied to the entire tea brick, achieving uniformity and regularity in the pressing process. This ensures consistent internal density of the finished tea brick, meets overall quality standards, and improves product quality. Furthermore, the oscillation mode, switching frequency, and pressing parameters can all be set and adjusted via the controller, offering flexible operation and strong adaptability.
[0014] By incorporating anti-slip textures on the bottom surface of the pressure head, the friction between the pressure head and the tea leaves is effectively increased. This design detail prevents relative slippage between the pressure head and the tea leaves under high speed or high pressure, ensuring effective transmission of pressing force and precise positioning of the pressure head. This, in turn, guarantees the accurate execution of the preset oscillating pressing trajectory, further improving the stability and consistency of the pressing effect.
[0015] By incorporating a height fine-tuning mechanism that engages with the support column and adjusting nut, the initial height of the entire guide plate and the hammer cylinder and pressure head assembly mounted on it can be precisely adjusted. This structure gives the device excellent process adaptability, easily compensating for mold wear, adapting to subtle height differences between different batches of molds, or optimizing the starting point of the pressing stroke, ensuring consistent starting conditions for each pressing operation and maintaining optimal working condition over the long term.
[0016] By setting limit plates and sliders, a horizontal motion track with good rigidity and low friction is provided for the slider and pressure head driven by the dual-axis cylinder. The cooperation between the T-shaped slider and the slide groove not only ensures smooth and wobbly sliding, but also effectively prevents the slider from twisting or derailing when subjected to lateral forces. This ensures the motion accuracy and long-term reliability of the pressure head during high-speed and high-frequency oscillation, and provides a solid mechanical foundation for realizing complex programmable pressing logic. Attached Figure Description
[0017] Figure 1 This is a front view of the present invention; Figure 2 This is the right view of the present invention; Figure 3 A bottom view of the pressure head mainboard provided by this utility model; Attached reference numerals: 1. Lifting connecting plate; 2. Support column; 3. Hammer cylinder; 4. Guide column; 5. Guide middle plate; 6. Press head main plate; 7. Limit plate; 8. Connecting rod; 9. Press head one; 10. Press head two; 11. Slider; 12. Dual-axis cylinder; 13. Linear bearing; 14. Nut; 15. Slide groove. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1-3The illustrated oscillating tea brick pressing device includes a lifting connecting plate 1. Four support columns 2 are symmetrically connected around the lifting connecting plate 1. These four support columns 2 are slidably connected to a guide plate 5. The guide plate 5 has sliding holes corresponding to the four support columns 2, through which the four support columns 2 pass and are slidably connected. A hammer-pressing cylinder 3, model SMCCJ2, is connected to the top center of the guide plate 5. Compressed air enters the cylinder cavity from the air inlet P, pushing the piston to generate linear thrust. The air path direction is switched via a solenoid valve: when air enters through port A and exhausts through port B, the piston rod extends to provide downward pressure; when air enters through port B and exhausts through port A, the piston rod retracts to its original position. Its large cylinder diameter design converts air pressure into a large linear output force, providing the basic main pressure for tea brick pressing. This is existing technology and will not be elaborated upon further. The extension end of the hammer-pressing cylinder 3 passes downward through the guide plate 5 and is connected to the press head main plate 6 at its end. A dual-axis cylinder 12 is connected to the bottom of the press head main plate 6. The dual-axis cylinder 12 is an SMC MXS model. In addition to generating linear thrust, its built-in two parallel guide shafts ensure that the piston rod can still move precisely in a linear fashion when subjected to lateral loads. Its two air inlets are controlled by solenoid valves, allowing the piston rod to precisely stop at its extended or retracted ends. This feature allows the connected press head to be accurately positioned in two horizontal positions, left and right, providing a positional basis for oscillating pressing. This is existing technology and will not be elaborated further here. Two sets of dual-axis cylinders 12 are symmetrically arranged. The extension and retraction ends of the two sets of cylinders 12 are connected to sliders 11, and the bottoms of the two sliders 11 are connected to connecting rods 8. The two connecting rods 8 are respectively connected to pressure head 1 9 and pressure head 2 10. Each set of dual-axis cylinders 12 is equipped with a solenoid valve, which is an SMCSY model. As an air circuit switch, after receiving an electrical signal from the controller, its internal valve core moves to switch the direction of compressed air flow. Taking a two-position five-way single-electro-controlled valve as an example: when energized, the air circuit is open, causing the cylinder to move in one direction; when de-energized, the spring resets the valve core, and the air circuit reverses, causing the cylinder to reset. Through rapid and precise on / off control, the programmed scheduling of the cylinder's action sequence and speed is achieved. This is existing technology and will not be elaborated further here. The two sets of solenoid valves are used to control the extension and retraction states of the piston rod of the dual-axis cylinders 12. A controller is also included, and the solenoid valves of both sets of dual-axis cylinders 12 are electrically connected to the controller. The controller is configured to independently control the extension or retraction of the piston rod of each set of dual-axis cylinders 12, thereby giving the first pressure head 9 and the second pressure head 10 two different horizontal working positions. By controlling the combination of the horizontal working positions of the first pressure head 9 and the second pressure head 10, four different pressing point layouts can be formed. Since each set of dual-axis cylinders 12 has two stable positions, extension and retraction, the pressure heads 9 and 10 driven by it each have two defined horizontal working positions, left and right.By controlling different combinations of output signals from the two solenoid valves, the controller can control the working positions of the two pressure heads to form four different pressing point layouts (left-left, left-right, right-left, right-right). This allows the device to dynamically, alternately, and cover different areas of the tea brick surface with hammering according to the program settings. The key is that by rationally designing the planar layout of the four preset horizontal working positions of pressure head 9 and pressure head 10, it can be ensured that these four pressing points spatially cover the entire pressure area of the tea brick. The controller, through the program, controls pressure head 9 and pressure head 10 to apply pressure sequentially at these points, thus effectively compacting the entire tea brick area uniformly and zone by zone.
[0019] like Figure 1 As shown, four guide pillars 4 are symmetrically connected around the top of the main pressure plate 6, and linear bearings 13 are symmetrically connected around the guide plate 5. The four guide pillars 4 are slidably connected to the corresponding linear bearings 13 to ensure the vertical accuracy and stability of the lifting and lowering movement of the main pressure plate 6, effectively preventing the main pressure plate 6 from tilting during the pressing process. Two sets of dual-axis cylinders 12 are horizontally and parallelly installed on the main pressure plate 6, and the extension and retraction directions of the piston rods of the two sets of dual-axis cylinders 12 are perpendicular to the movement direction of the piston rod of the hammer pressing cylinder 3. The bottom pressing surfaces of the first pressure head 9 and the second pressure head 10 are provided with anti-slip textures to enhance the pressing effect and prevent slippage. The support column 2 is threaded with nuts 14, which are used to lock and fine-tune the initial height of the guide plate 5. The nuts 14 are tightened on the support column 2 and abut against the upper and lower surfaces of the guide plate 5. By tightening the nuts 14 that abut against the upper and lower surfaces of the guide plate 5, stepless fine-tuning and rigid locking of the initial height of the guide plate 5 can be achieved.
[0020] like Figure 2 As shown, the front and rear ends of the bottom of the pressure head main board 6 are respectively connected to the limiting plates 7. The two limiting plates 7 are respectively provided with the slide grooves 15 corresponding to the T-shaped structure. The slider 11 is T-shaped. The two ends of the T-shaped head of the two sliders 11 are respectively embedded in the slide grooves 15 of the front and rear limiting plates 7, so that they are constrained in the slide grooves 15 to slide linearly.
[0021] The specific implementation process is as follows: In use, the hammer cylinder 3, under the control of the controller and the corresponding solenoid valve, begins to perform continuous reciprocating motion, that is, hammering up and down. Its piston rod repeatedly extends (presses down) and retracts (lifts up) at a certain frequency and stroke, providing continuous and cyclical main pressure for pressing.
[0022] During each downward stroke of the hammer-pressing cylinder 3, the controller synchronously outputs control signals to the solenoid valves of the two sets of dual-axis cylinders 12. These signals, according to the program settings, determine the horizontal position of the first press head 9 and the second press head 10 during this downward stroke. By controlling the extension or retraction of the piston rods of the dual-axis cylinders 12, the two press heads can quickly switch between left and right positions.
[0023] The distribution of the four preset pressing points of pressure head 9 and pressure head 10 is designed to jointly cover the entire pressure surface of the tea brick. The controller is programmed to cause the two pressure heads to change their horizontal position combination in real time according to a predetermined sequence during the continuous up-and-down movement of the hammer cylinder 3. This means that each hammer blow from the hammer cylinder 3 can potentially act on a different sub-area of the tea brick surface.
[0024] This complex motion, within several to dozens of pressing cycles, allows the pressing force to act evenly and fully over the entire area of the tea brick in a dynamic, dotted pattern. This method actively adapts to and eliminates microscopic unevenness in the accumulation of raw materials, achieving deep and uniform compaction.
[0025] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A swingable tea brick pressing device, characterized in that: The system includes a lifting connecting plate (1), which is connected to a support column (2). The support column (2) is slidably connected to a guide plate (5). The guide plate (5) is connected to a hammer cylinder (3). The extension end of the hammer cylinder (3) is connected to a pressure head main plate (6). The pressure head main plate (6) is connected to a dual-axis cylinder (12). The dual-axis cylinder (12) has two sets. The extension ends of the two sets of dual-axis cylinders (12) are respectively connected to sliders (11). The sliders (11) are connected to connecting rods (8). The two connecting rods (8) are respectively connected to pressure head one (9) and pressure head two (10). The two sets of dual-axis cylinders (12) are respectively equipped with solenoid valves. The two sets of solenoid valves are used to control the extension and retraction states of the piston rod of the dual-axis cylinder (12).
2. The oscillating tea brick pressing device according to claim 1, wherein: It also includes a controller, and the solenoid valves of both sets of the biaxial cylinders (12) are electrically connected to the controller.
3. A swingable tea brick pressing device according to claim 2, characterized in that: The controller is configured to independently control the extension or retraction state of the piston rod of each set of dual-axis cylinders (12), thereby giving the first (9) and the second (10) two different horizontal working positions; by controlling the combination of the horizontal working positions of the first (9) and the second (10), the working positions of the first (9) and the second (10) can form four different pressing point layouts.
4. The oscillating tea brick pressing device according to claim 1, wherein: The pressure head main plate (6) is connected to a guide post (4), and the guide middle plate (5) is connected to a linear bearing (13). The guide post (4) and the linear bearing (13) are slidably connected.
5. The oscillating tea brick pressing device according to claim 1, wherein: The two sets of dual-axis cylinders (12) are mounted horizontally and parallel on the main platen (6) of the pressure head. The extension and retraction directions of the piston rods of the two sets of dual-axis cylinders (12) are perpendicular to the movement direction of the piston rod of the hammer cylinder (3).
6. The oscillating tea brick pressing device according to claim 1, wherein: The bottom pressing surfaces of both the first pressing head (9) and the second pressing head (10) are provided with anti-slip textures.
7. The oscillating tea brick pressing device according to claim 1, wherein: The support column (2) is threaded with a nut (14), which is used to lock and fine-tune the initial height of the guide plate (5).
8. The oscillating tea brick pressing device according to claim 1, wherein: The pressure head main board (6) is connected to the limiting plate (7), the limiting plate (7) has a sliding groove (15), the slider (11) is T-shaped, and the slider (11) is slidably connected to the sliding groove (15).