Brick tea compression molding method

Abstract

The invention relates to the technical field of brick tea processing, in particular to a brick tea pressing and shaping method which is characterized in that a main mold and an auxiliary mold are arranged, the main mold is provided with a brick tea pressing mold cavity, the auxiliary mold is provided with a brick tea shaping mold cavity, and a supporting plate and a cover plate are further arranged; steamed tea leaves are put into a tea brick pressing mold cavity and a tea brick shaping mold cavity, a pressing block moves downwards to press the tea leaves, then the tea leaves continue to be put for pressing again till the total amount of the put tea leaves meets the requirement, tea bricks are obtained through pressing, then the top of an auxiliary mold is closed through a cover plate, a supporting plate and the tea bricks are jacked up through an ejector rod till the auxiliary mold is separated from a main mold, and the tea bricks are obtained. The supporting plate is fixedly connected with the bottom of the auxiliary mold, the auxiliary mold and brick tea in the auxiliary mold are moved away, the cover plate is opened, and the brick tea is taken out after a certain time, the main mold does not need to be detached, only the auxiliary mold needs to be replaced, the auxiliary mold is used for conducting pressure maintaining and shaping on the brick tea, the working efficiency is improved, the equipment cost is reduced, and the brick tea quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tea brick processing, in particular to a tea brick pressing and shaping method. Background Art

[0002] Pressing tea leaves into tea bricks can reduce their volume and facilitate transportation. Later, people found that after tea leaves were formed into tea bricks under high pressure, the contact between tea leaves and air was effectively reduced, so that the tea leaves were fermented and the components of the tea leaves were transformed. After a slow transformation period, the taste of the tea leaves became better and the tea leaves could be stored longer.

[0003] Tea bricks are classified into green brick tea, black brick tea and other types according to different raw materials and production processes. For example, the black Fu tea produced by our company is the most distinctive product among black teas, and is a post-fermented tea. Our company's invention patent 2014100820941 Black Fu tea production method discloses its production method, firstly, the picked tea leaves are subjected to withering, initial rolling, pile fermentation, re-rolling, and drying to obtain black tea, and then cold fermentation, hot fermentation, weighing tea, steaming tea, pressing, blooming, drying and other processes to obtain tea bricks.

[0004] The above-mentioned black Fu tea and other types of tea bricks need to go through a pressing (i.e., compacting) process. Our company disclosed a black Fu tea brick pressing device in the utility model patent 2014201023612. When using it, the lower mold is placed on the workbench, and the tea leaves are put in from the upper end of the tea brick mold cavity, and then the pressure is driven to press the tea leaves. After a little pressing, the tea leaves are put in again to fill the tea brick mold cavity, and then pressed again. The tea brick is pressed into shape through multiple pressings, and then the entire lower mold together with the tea brick inside it is removed, and another empty lower mold is placed on the workbench to press the next piece. After the tea brick cools in the lower mold for a period of time, the support plate is lifted up by the lower end of the lower mold, so that the tea brick is taken out of the lower mold 1.

[0005] After the tea brick is pressed, it cannot be directly removed from the mold, otherwise it is easy to damage the tea brick that has not yet been shaped and solidified, and the tea brick is easy to become loose due to its own rebound. The above technology removes the entire lower mold together with the tea brick after pressing. Although it solves the problem of maintaining the pressure of the tea brick after pressing, it is troublesome to disassemble the mold, which affects the work efficiency. The mold is heavy and leads to high labor intensity. In addition, multiple sets of lower molds are required, which increases the equipment cost. There is also the defect of inconvenience in putting in tea leaves and taking out tea bricks.

[0006] In response to the above problems, invention patent 201710495056 discloses an automated lifting and pressure-maintaining device and method for a green tea brick mold. The mold is moved by an automated lifting device, which reduces labor intensity. However, there are still problems such as the inconvenience of mold disassembly and high equipment costs. Summary of the invention

[0007] The purpose of the present invention is to provide a new method for pressing and shaping tea bricks to address the deficiencies of the prior art. The tea bricks are first pressed in a lower mold and then moved to a secondary mold for pressure-maintaining shaping, thereby improving the quality of the tea bricks, reducing equipment costs, and improving labor efficiency.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a tea brick pressing and shaping method, which is specially provided with a main mold and a sub-mold, the main mold is provided with a tea brick pressing mold cavity which passes through from top to bottom, the sub-mold is provided with a tea brick shaping mold cavity, and is also provided with a support plate which can close the bottom surface of the tea brick pressing mold cavity, and a cover plate which can close the top surface of the tea brick shaping mold cavity, firstly, the lower end of the sub-mold is detachably connected with the upper end of the main mold, and the steamed tea leaves are put into the tea brick pressing mold cavity and the tea brick shaping mold cavity, and the pressing block of the press moves downward to press the tea leaves in the tea brick shaping mold cavity into the tea brick pressing mold cavity, and then the tea leaves are continuously put in and pressed again until the total amount of tea leaves put in reaches the requirement, and the tea brick is pressed to obtain the tea brick, and then the top of the sub-mold is closed by the cover plate, and the support plate and the tea brick are lifted by the push rod until the sub-mold is separated from the main mold, and the support plate is fixedly connected to the bottom of the sub-mold, and the sub-mold and the tea bricks therein are removed, and after a certain period of time, the cover plate is opened to take out the tea bricks.

[0009] By adopting the above technical scheme, the pressing mold is divided into a detachable main mold and a sub-mold. During pressing, the support plate is first placed at the bottom of the tea brick pressing cavity, and then the sub-mold is installed above the main mold. The tea brick pressing cavity and the tea brick shaping cavity are connected as one, and tea leaves are put in from above the sub-mold. Due to the guidance of the sub-mold, more tea leaves can be put in at one time. The sub-mold plays a role in guiding the tea leaves at this time. Then the pressing block of the press moves downward, passes through the tea brick shaping cavity, and presses the tea leaves once in the main mold. Then the pressing block moves upward and exits the tea brick shaping cavity, and tea leaves continue to be put in from above the sub-mold, and then continue to press until the total amount of tea put in reaches the requirement. Then the pressing block presses down to press the tea brick into shape. Compared with the existing technology, more tea leaves can be put in each time, the number of pressing times is reduced, and the efficiency of pressing tea bricks is improved. Then the pressing block is withdrawn, and the cover plate is fixed on the top of the sub-mold. The push rod device of the press moves upward to lift the support plate and the tea brick to the tea brick shaping cavity, and then continues to move upward. The tea brick lifts the cover plate. Since the cover plate is fixedly connected to the sub-mold, the sub-mold is separated from the main mold and moves upward. The support plate is exposed outside the tea brick pressing cavity and is located at the bottom of the tea brick shaping cavity. At this time, the support plate and the sub-mold are fixed by a fixing device. In this way, the tea brick is withdrawn from the mold and the sub-mold is separated from the main mold. The main mold still stays at the press and does not need to be disassembled and installed. The sub-mold continues to maintain the pressure on the tea brick using the cover plate and the support plate, thereby extending the shaping time of the tea brick. Take away the sub-mold and the tea brick, put down another sub-mold and support plate, and press the tea brick again.

[0010] The tea brick pressing mold cavity has the same shape as the tea brick shaping mold cavity. Furthermore, the dimensions of the tea brick shaping mold cavity are 1%-4% larger than those of the tea brick pressing mold cavity in the horizontal and vertical directions, respectively.

[0011] By adopting the above technical solution, the present application can press the tea brick with greater pressure to make the tea brick more compact, and after pressing, place it into a larger tea brick shaping mold cavity to allow it to have a certain degree of rebound, release the internal pressure, and then maintain pressure and shape it.

[0012] The present invention is further configured as follows: the lower end of the auxiliary mold is connected to the upper end of the main mold by snapping. Furthermore, the upper end of the main mold is provided with a guide groove, and the lower end of the auxiliary mold is provided with a flange for inserting into the groove.

[0013] By adopting the above technical solution, the lower end of the sub-mold can be easily disassembled and connected to the main mold, the sub-mold is not easy to shake, and after installation, the continuity of the pressing mold cavity and the tea brick shaping mold cavity is maintained, so that the tea brick can be easily lifted up along the inner walls of the main mold and the sub-mold, and will not disperse when the tea brick exits the main mold.

[0014] The present invention is further configured as follows: a limiting block is provided at the bottom of the main mold, and when the support plate closes the bottom surface of the tea brick pressing mold cavity, the limiting block is supported against the lower side of the support plate.

[0015] By adopting the above technical solution, the support plate can slide up and down in the tea brick pressing mold cavity. When it slides to the bottom, the limit block limits and supports the support plate. When the tea brick is pressed, the tea brick is pressed tightly on the support plate. After pressing, the push rod can lift the support plate, and lift the support plate and the tea brick at the same time.

[0016] The present invention is further configured as follows: the sub-mold is provided with a fixing device for fixing the support plate to the bottom of the sub-mold and for fixing the cover plate to the top of the sub-mold, the fixing device is a buckle, and the buckle is hinged to the sub-mold, when the buckle is flipped upward, the buckle presses the cover plate to the top of the sub-mold, and when the buckle is flipped downward, the buckle presses the support plate to the bottom of the sub-mold.

[0017] By adopting the above technical solution, the cover plate and the support plate can be fixed by the buckle ring, so that they can continue to maintain pressure on the tea brick and extend the time for shaping the tea brick. The buckle ring has a simple structure and is easy to operate, and it can be easily rotated to fasten or loosen the cover plate and the support plate. Furthermore, a groove can be set at the fastening part of the cover plate and the support plate, so that the buckle ring on the upper side does not exceed the top surface of the cover plate when fastened, and the buckle ring on the lower side does not exceed the bottom surface of the support plate when fastened, so that after the sub-mold is fixedly connected to the cover plate and the support plate, there are no protrusions on its upper and lower surfaces, which is convenient for carrying and storage, and it is also convenient to rotate the buckle ring to avoid being blocked by other objects.

[0018] The beneficial effects of the present invention are: 1. By adopting the method of the present invention, the main mold does not need to be disassembled, and only the sub-mold needs to be replaced, thereby improving the efficiency of pressing tea bricks; for the sub-mold, the pressure it needs to withstand is much smaller than that of the main mold, so lightweight and thinner materials can be used, making the sub-mold lower in cost, lighter in weight, and easier to transport.

[0019] 2. The tea brick is transferred to the tea brick shaping cavity of the sub-mold to continue to maintain pressure and shape, which prolongs the shaping time of the tea brick. The tea brick will not rebound and become loose, which is beneficial to improving the quality of the tea brick.

[0020] 3. The tea brick pressing mold cavity has the same shape as the tea brick shaping mold cavity, but the size of the tea brick shaping mold cavity can be slightly larger than the tea brick pressing mold cavity, which can not only release the internal pressure of the tea brick after pressing, but also limit its volume, so that the tea brick will not become loose and deformed. When the tea brick is pressed with a greater pressure, the juice squeezed out can fill the interior after the internal pressure of the tea brick is released, which can bond the tea brick and make it easier for the tea brick to solidify into a brick.

[0021] 4. Easy to use. Use the push rod to lift the support plate and the tea brick at the same time. The tea brick lifts the cover plate and the sub-mold to achieve the separation of the main mold and the sub-mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of a tea brick pressing mold used in the tea brick pressing and shaping method of the present invention, with a cover plate hidden.

[0023] Figure 2 It is a schematic structural diagram of the tea brick pressing and shaping method of the present invention when pressing a tea brick.

[0024] Figure 3 It is a schematic structural diagram of the tea brick when the tea brick is lifted up by the tea brick pressing and shaping method of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the tea brick shaping method of the present invention when shaping the tea brick.

[0026] Description of reference numerals: 1——Main mold 11——Tea brick pressing mold cavity 12——Guide groove 13——Limiting block 2——Secondary mold 21——Tea brick shaping mold cavity 22——Flange 3——Support plate 4——Cover plate 5——Buckle DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the tea brick pressing and shaping method of this embodiment is provided with a main mold 1 and a sub-mold 2. The main mold 1 is provided with a tea brick pressing mold cavity 11 which passes through from top to bottom, and the sub-mold 2 is provided with a tea brick shaping mold cavity 21. A support plate 3 which can close the bottom surface of the tea brick pressing mold cavity 11 and a cover plate 4 which can close the top surface of the tea brick shaping mold cavity 21 are also provided. First, the lower end of the sub-mold 2 is detachably connected to the upper end of the main mold 1, and the steamed tea leaves are put into the tea brick pressing mold cavity 11 and the tea brick shaping mold cavity 21. The press The pressing block moves downward to press the tea leaves in the tea brick shaping cavity 21 into the tea brick pressing cavity 11, and then the tea leaves are continuously put in and pressed again until the total amount of tea leaves put in reaches the requirement and the tea brick is pressed. Then, the top of the sub-mold 2 is closed by the cover plate 4, and the support plate 3 and the tea brick are lifted up by the push rod until the sub-mold 2 is separated from the main mold 1, and the support plate 3 is fixedly connected to the bottom of the sub-mold 2, and the sub-mold 2 and the tea brick therein are removed. After a certain period of time, the cover plate 4 is opened to take out the tea brick.

[0029] When operating, Figure 1 , 2 As shown, first fix the main mold on the workbench of the press, connect the lower end of the sub-mold 1 with the upper end of the main mold 1, put the support plate 3 into the bottom of the tea brick pressing cavity 11, and the cover plate 4 is not used at this time. Put the steamed tea leaves from the upper port of the sub-mold 2, and the loose tea leaves fill the tea brick pressing cavity 11 and the tea brick shaping cavity 21, and then use the press to slightly press. The press can use a fixed stroke pressing, that is, the downward stroke is the same each time it is pressed, and the tea leaves in the tea brick shaping cavity 21 are pressed into the tea brick pressing cavity 11 and then no longer go down. After the first pressing is exited, continue to put tea leaves from the sub-mold 2, and then continue to press until the total amount of tea leaves put in reaches the requirement, and then the pressing block is pressed down to press the tea brick into shape. Compared with the prior art, more tea leaves can be put in each time, reducing the number of pressing times and improving the efficiency of pressing tea bricks.

[0030] Then the pressing block is withdrawn, as Figure 3As shown, the cover plate 4 is fixed to the top of the auxiliary mold 2, and the push rod device of the press machine moves upward to push the support plate 3 and the tea brick upward to the tea brick shaping cavity 21, and then continues to move upward, and the tea brick pushes up the cover plate 4. Since the cover plate 4 is fixedly connected to the auxiliary mold 2 at this time, the auxiliary mold 2 is separated from the main mold 1 and moves upward, so that the support plate 3 is exposed outside the tea brick pressing cavity 11 and is located at the bottom of the tea brick shaping cavity 21. At this time, the support plate 3 and the auxiliary mold 2 are fixed by a fixing device, as shown in FIG. Figure 4 shown.

[0031] Through the above process, the tea brick is demoulded and the auxiliary mold 2 is separated from the main mold 1. The main mold 1 remains on the workbench of the press machine and does not need to be disassembled and installed. The auxiliary mold 2 uses the cover plate 4 and the support plate 3 to continue to press the tea brick, thereby extending the shaping time of the tea brick. The auxiliary mold 2 and the tea brick are taken away, and another auxiliary mold 2 and the support plate 3 are put down to press the tea brick for the next time.

[0032] In this embodiment, the tea brick pressing mold cavity has the same shape as the tea brick shaping mold cavity and can be a variety of conventional shapes such as a rectangular parallelepiped and a round cake. Furthermore, the size of the tea brick shaping mold cavity is 1%-4% larger than the size of the tea brick pressing mold cavity in the horizontal and vertical directions. In this embodiment, the present application can press the tea brick with greater pressure to make the tea brick more compact, squeeze out the tea juice of the tea leaves, and put it into a larger tea brick shaping mold cavity after pressing, so that it has a certain limit of rebound, release the internal pressure, and then maintain pressure and shape it. After the tea juice rebounds, the tea juice fills the inside of the tea brick, which not only increases the viscosity between the tea leaves, making the tea brick easier to solidify into blocks, but also facilitates the subsequent flower-forming process to generate more golden flowers.

[0033] like Figure 2 As shown, the lower end of the sub-mold 2 is snap-connected with the upper end of the main mold 1. Specifically, the upper end of the main mold 1 is provided with a guide groove 12, and the lower end of the sub-mold 2 is provided with a flange portion 22 for inserting into the groove 12. This structure is convenient and quick to disassemble, thereby improving the efficiency of replacing the sub-mold 2.

[0034] Furthermore, a limiting block 13 is provided at the bottom of the main mold 1 , and when the support plate 3 closes the bottom surface of the tea brick pressing mold cavity 11 , the limiting block 13 is supported against the lower side of the support plate 3 .

[0035] Furthermore, the sub-mold 2 is provided with a fixing device for fixing the support plate 3 to the bottom of the sub-mold 2 and for fixing the cover plate 4 to the top of the sub-mold 2, and the fixing device is a buckle 5, and the buckle 5 is hinged to the sub-mold 2. When the buckle 5 is flipped upward, the buckle 5 presses the cover plate 4 to the top of the sub-mold 2, and when the buckle 5 is flipped downward, the buckle 5 presses the support plate 3 to the bottom of the sub-mold 2.

[0036] Furthermore, grooves can be provided at the fastening points of the cover plate 4 and the support plate 3 so that the upper buckle 5 does not extend beyond the top surface of the cover plate 4 when fastened, and the lower buckle 5 does not extend beyond the bottom surface of the support plate 3 when fastened. This ensures that after the sub-mold 2 is fixedly connected to the cover plate 4 and the support plate 3, there are no protrusions on its upper and lower surfaces, which is convenient for carrying and storage, and also convenient for rotating the buckle to avoid being blocked by other objects.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A method for pressing and shaping tea bricks, characterized in that: A main mold (1) and a secondary mold (2) are provided. The main mold (1) is provided with a tea brick pressing mold cavity (11) which is connected from top to bottom. The secondary mold (2) is provided with a tea brick shaping mold cavity (21). A support plate (3) which can seal the bottom surface of the tea brick pressing mold cavity (11) and a cover plate (4) which can seal the top surface of the tea brick shaping mold cavity (21) are also provided. The lower end of the secondary mold (2) is detachably connected to the upper end of the main mold (1). Steamed tea leaves are put into the tea brick pressing mold cavity (11) and the tea brick shaping mold cavity (21). The pressing block of the press moves downward. The tea leaves in the tea brick shaping mold cavity (21) are pressed into the tea brick pressing mold cavity (11), and then tea leaves are continuously added and pressed again until the total amount of tea leaves added reaches the required amount, and a tea brick is pressed. Then, the top of the sub-mold (2) is closed by the cover plate (4), and the support plate (3) and the tea brick are lifted up by the push rod until the sub-mold (2) is separated from the main mold (1). The support plate (3) is fixedly connected to the bottom of the sub-mold (2), and the sub-mold (2) and the tea brick therein are removed. After a certain period of time, the cover plate (4) is opened to take out the tea brick.

2. The tea brick pressing and shaping method according to claim 1, characterized in that: The tea brick pressing mold cavity (11) and the tea brick shaping mold cavity (21) have the same shape.

3. The tea brick pressing and shaping method according to claim 2, characterized in that: The dimensions of the tea brick shaping mold cavity (21) are respectively 1%-4% larger than the dimensions of the tea brick pressing mold cavity (11) in the horizontal direction and the vertical direction.

4. The tea brick pressing and shaping method according to claim 1, characterized in that: The lower end of the auxiliary mold (2) is snap-fitted and connected to the upper end of the main mold (1).

5. The method for pressing and shaping tea bricks according to claim 4, characterized in that: The upper end of the main mold (1) is provided with a guide groove (12), and the lower end of the auxiliary mold (2) is provided with a flange portion (22) for inserting into the groove (12).

6. The tea brick pressing and shaping method according to claim 1, characterized in that: A limiting block (13) is provided at the bottom of the main mold (1), and when the support plate (3) closes the bottom surface of the tea brick pressing mold cavity (11), the limiting block (13) is supported against the lower side of the support plate (3).

7. The tea brick pressing and shaping method according to claim 1, characterized in that: The sub-mold (2) is provided with a fixing device for fixing the support plate (3) to the bottom of the sub-mold (2) and for fixing the cover plate (4) to the top of the sub-mold (2); the fixing device is a buckle (5); the buckle (5) is hinged to the sub-mold (2); when the buckle (5) is turned upward, the buckle (5) presses the cover plate (4) to the top of the sub-mold (2); when the buckle (5) is turned downward, the buckle presses the support plate (3) to the bottom of the sub-mold (2).

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