Automatic pressing and forming platform for tea pressing equipment

Abstract

The invention relates to the technical field of pressing and forming platforms, and specifically to an automatic pressing and forming platform of tea pressing equipment, which cooperates with a pressing head to press loose tea into tea cakes, comprising a frame, a first cylinder, a silo, a stripping plate, a second cylinder, a fixed die, a third cylinder, a lifting module and a movable die, wherein the fixed die comprises a feeding section and a compression section from top to bottom, the third cylinder comprises a cylinder body and a push rod, the push rod is inserted into the fixed die from the lower end of the fixed die, the lifting module is connected to the upper end of the push rod, the movable die is pushed by the first cylinder to push the loose tea fed into the silo into the fixed die, the lifting module is pushed by the push rod to quickly reciprocate in the compression section to evenly spread the loose tea, and the lifting module lifts the tea cake to above the fixed die and strips it by shrinking its diameter when passing through the feeding section. The invention achieves the purpose of stripping the tea cake by means of a small bearing surface while driving the loose tea to reciprocate up and down to evenly spread it by means of a large bearing surface by changing the tea bearing area in the fixed die.

Description

Technical Field

[0001] The invention relates to the technical field of pressing and forming platforms, in particular to an automatic pressing and forming platform for tea pressing equipment. Background Art

[0002] Tea culture has a long history. In the long-term development, for the convenience of storage and transportation, loose tea is usually made into tea cakes. The traditional techniques of making cakes can be roughly divided into: steaming, pressing and molding. First, the water content of loose tea is increased by steaming to facilitate the compaction of the tea cake. Then the loose tea is placed in a mold and smoothed to make the pressed tea cake uniform in firmness. Then a press is used for a short period of time. Finally, the pressed tea cake is placed under a heavy object (such as a stone mill) for a long time to form it.

[0003] Obviously, the traditional process of tea cake production requires manual participation, and with the continuous advancement of technology, the trend of tea cake production moving towards automation is inevitable. For example, some existing technologies have designed an automatic pressing and forming platform to make the tea cake production process without manual participation. Figure 1 First, a quantitative amount of loose tea is put into the silo, then the movable mold pushes the loose tea in the silo into the fixed mold, and then the pressure head presses down to press the loose tea in the fixed mold into tea cakes, and then the push plate moves upward to push the tea cakes out, and finally the push plate moves downward, and with the help of its own diameter smaller than the tea cake, it cooperates with the horizontally moving demoulding plate to complete the demoulding of the tea cake.

[0004] Although the existing automatic pressing and forming platform can automate the production of tea cakes, it cannot be directly used to produce high-quality tea cakes. The basic requirement for high-quality tea cakes is uniform compactness. In the prior art, after the loose tea enters the fixed mold from the silo, there is no effective means to spread it evenly in the fixed mold, and thus the compactness of the pressed tea cake cannot be guaranteed to be uniform, which affects the quality of the tea cake. Therefore, when producing high-quality tea cakes, manual participation is still required to smooth the loose tea in the fixed mold.

[0005] In order to make the compactness of tea cakes uniform in automated production, an automatic pressing and forming platform of tea pressing equipment is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an automatic pressing and forming platform for tea pressing equipment, which solves the problem that the automatic pressing and forming platform cannot ensure the uniform compactness of tea cakes during the production process. By changing the tea receiving area in the fixed mold and using a small receiving surface to drive the tea cakes to be demoulded, the large receiving surface is used to drive the loose tea to move up and down in an evenly distributed manner, thereby achieving the purpose of improving the quality of the tea cakes.

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

[0008] An automatic pressing and forming platform of tea pressing equipment cooperates with a pressing head to press loose tea into tea cakes, comprising a frame, a first cylinder, a silo, a stripping plate, a second cylinder, a fixed die, a third cylinder, a material lifting module and a movable die, wherein the fixed die is mounted on the frame and comprises a feeding section and a compression section from top to bottom, the third cylinder comprises a cylinder body and a push rod, the cylinder body is located below the fixed die, the push rod is inserted into the fixed die from the lower end of the fixed die, the material lifting module is connected to the upper end of the push rod, and the movable die is on the left side of the fixed die;

[0009] The movable mold is pushed by the first cylinder to push the loose tea fed into the silo into the fixed mold. The lifting module is pushed by the push rod to quickly reciprocate in the compression section to evenly spread the loose tea. The lifting module lifts the tea cake to the top of the fixed mold and shrinks its diameter when passing through the feeding section to demould.

[0010] Preferably, the lifting module comprises an inner plate, an outer plate, a slider and a spring, the inner plate comprises an inner body, an upper flange and a lower flange, the inner body is connected to the upper end of the push rod, the upper flange and the lower flange are arranged on the circumference of the inner body in sequence from top to bottom, the outer plate comprises an outer body, a middle flange and a slide groove, the outer circumference of the outer body fits the inner wall of the compression section, the middle flange is arranged on the inner circumference of the outer body, a plurality of the slide grooves are arranged in a circular array on the outer plate, so that the outer plate is subjected to uniform force at various locations to avoid tilting of the outer plate due to local pressure, the slide groove comprises a lower groove and an upper groove from bottom to top, the lower groove runs through the outer body and the middle flange, the slider is inserted into the lower groove, the spring is placed in the upper groove and is located between the inner wall of the upper groove and the slider;

[0011] The outer diameter of the upper flange, the inner diameter of the middle flange and the outer diameter of the lower flange decrease in sequence, and the inner diameter of the feeding section is larger than the inner diameter of the compression section, so as to avoid the resistance of the feeding section to the tea cake and improve the quality of the tea cake;

[0012] When the lifting module is in the compression section: 1. Since the outer diameter of the upper flange is larger than the inner diameter of the middle flange, the lower end face of the upper flange falls on the upper end face of the middle flange; 2. The slider is squeezed by the inner wall of the compression section and approaches the central axis of the compression section, so that the lower end face of the slider contacts the upper end face of the lower flange; through the above two processes, the inner plate and the outer plate are relatively fixed in the up and down directions, so that the lifting module is pushed by the push rod to reciprocate in the compression section to evenly spread the loose tea;

[0013] When the lifting module moves upward in the feed section, since the inner diameter of the feed section is larger than the inner diameter of the compression section, the inner wall of the feed section no longer squeezes the slider, so that the slider is moved away from the center axis of the feed section by the spring force, so that the lower end face of the slider no longer contacts the upper end face of the lower flange, and the outer diameter of the lower flange is smaller than the inner diameter of the middle flange. Therefore, the inner plate separates from the outer plate during the upward process. Through the above process, the purpose of reducing the diameter of the lifting module when passing through the feed section is achieved.

[0014] In order to facilitate the joining of the outer plate and the inner plate, the edges and corners of the outer plate and the inner plate should be designed. It can be seen that there are many design methods, such as providing a chamfer on the inner upper edge of the outer body. Compared with this solution, the above solution needs to arrange a corresponding structure on the circumference of the upper flange to fill the space formed by the chamfer on the inner upper edge of the outer body, because when pressing the tea cake, it is necessary to ensure that the molding surface of the tea cake is complete and flat. In addition, in the above solution, when the upper flange passes through the chamfered inclined surface provided by the inner upper edge of the outer body, it will scratch the inclined surface, making the inclined surface uneven, which will cause the upper end surface of the upper flange to be uneven with the upper end surface of the outer body after the inner plate and the outer plate are joined, which affects the effect of pressing and molding the tea cake.

[0015] Preferably, the outer lower edge of the upper flange is chamfered, while the outer upper edge of the upper flange and the inner upper edge of the outer body are not chamfered. This not only avoids various problems caused by chamfering the inner upper edge of the outer body, but also improves the demoulding effect of the tea cake.

[0016] Preferably, the fixed die also includes a transition section, which is located between the feeding section and the compression section. The angle between the inner wall contour of the transition section and the vertical direction on the longitudinal section is α, and α<45°. This is to prevent the accumulation of tea leaves on the transition section. The fixed die is usually made of steel, and the friction coefficient between the tea leaves and the steel plate is between 0.456 and 0.674 depending on their own water content. The loose tea will be steamed before pressing, so the water content inside the loose tea is relatively high, and the friction coefficient between the loose tea and the steel plate will be greater. In order to ensure that the tea leaves can slide smoothly on the inclined surface, the friction coefficient is preset to 1.000, and accordingly, the value of α should be less than 45°; in addition, the smaller the α value, the smoother the reset of the slider under the action of the spring when it enters the transition section.

[0017] Preferably, the inner lower edge of the movable mold is set to a chamfer with an angle of α with the vertical direction. On the one hand, it is to form a complete surface with the transition section, so that after the outer plate falls off, each slider on the outer plate can be effectively supported to avoid the outer plate from tilting due to uneven force, thereby inducing the phenomenon of local force when the outer plate and the inner plate are joined; on the other hand, compared with the vertical inner wall of the movable mold in the prior art, the loose tea in the silo is pushed flat into the interior of the fixed mold. When the chamfer of the inner lower edge of the movable mold in this scheme contacts the tea, it can give the surrounding tea a certain upward bearing force, thereby reducing the wear caused by the friction between the tea and the inner bottom wall of the silo, so as to avoid the large-scale generation of tea residues, thereby ensuring the quality of the tea cake.

[0018] Preferably, the lower end surface of the slider is set to a stepped surface structure, and the outer side of the lower end surface of the slider is higher than the inner side. The setting of the stepped surface provides double protection for the slider: on the one hand, when the tea cake is pressed, the lower end surface of the slider does not contact the bottom of the fixed mold, thereby avoiding the large downward pressure of the pressure head acting on the slider, reducing the risk of damage to the slider; on the other hand, the opening of the stepped surface reduces the area of ​​the outer peripheral surface of the slider, thereby reducing the friction between the slider and the inner wall of the compression section during the up and down reciprocating process, thereby reducing the internal force between the slider and the lower groove, and reducing the risk of structural damage. Of course, there are many ways to reduce the friction between the slider and the inner wall of the compression section, such as setting the outer peripheral surface of the slider to an arc surface in the vertical direction, so that the outer peripheral surface of the slider is in line contact with the compression section. Compared with the present scheme, although the above scheme reduces the friction between the slider and the inner wall of the compression section, it also reduces the friction between the slider and the transition section, causing the outer plate to go down excessively in the transition section after detaching, or even directly fall into the compression section, so that the slider is close to the central axis of the transition section in advance, so that the inner plate cannot engage with the outer plate after going down.

[0019] Preferably, the outer lower edge of the slider is set as a chamfer with an angle of α with the vertical direction. With the help of the chamfer with the same slope as the transition section, the slider is in surface contact with the inner wall of the transition section, and the friction force formed between the two can effectively prevent the outer plate from descending excessively.

[0020] Preferably, the third cylinder is a two-stage cylinder, and the first-stage stroke distance value of the third cylinder is smaller than the height value of the compression stage. The third cylinder has a speed regulation function. With the help of the reciprocating implementation of the first-stage stroke of the third cylinder, the inner plate and the outer plate can quickly reciprocate in the compression stage to evenly spread the loose tea; with the help of the full-stage stroke of the third cylinder, the tea cake can be slowly pushed out to demould and the outer plate can be reengaged.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention enables the inner plate and the outer plate in the material lifting module to be connected or separated, so that the receiving area of ​​the tea leaves in the fixed mold has two states, large and small. The large receiving surface when connected is used to drive the loose tea to move up and down to be evenly spread, and the small receiving surface when separated is used to facilitate demoulding of the tea cake, thereby making the compactness of the tea cake uniform and improving the quality.

[0023] 2. The present invention divides the fixed mold into a feeding section and a compression section with gradually decreasing inner diameters from top to bottom, and a transition section is arranged between the two sections. By changing the inner diameter of the fixed mold, the inner plate and the outer plate are engaged or separated during the up and down movement to achieve the even distribution of loose tea or the demoulding of tea cakes, and the edges of the movable mold are arranged as chamfers that coincide with the inclined surfaces of the transition section, so that while the inner plate and the outer plate move smoothly in the fixed mold, the movable mold can give a certain bearing capacity to the tea leaves pushed out of the silo, thereby reducing the wear of the tea leaves to ensure the quality of the tea cakes.

[0024] 3. The present invention makes it easier and more stable to rejoin the inner and outer panels after separation through the design of the edges of the inner and outer panels, so as to switch the spreading function and the demoulding function more smoothly, and avoid damage to the key parts of the inner and outer panels. At the same time, the chamfer of the upper flange of the inner panel is used to guide the demoulding plate, so that the gap between the demoulding plate and the inner panel is smaller, thereby increasing the contact area between the tea cake and the demoulding plate, so that the force on the tea cake is more uniform when demoulding, and the demoulding effect is better, so that the quality of the tea cake is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an existing automatic pressing and forming platform;

[0026] Figure 2 It is a schematic diagram of the overall isometric structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 The enlarged schematic diagram of part A in the middle;

[0028] Figure 4 It is a schematic diagram of the state of the material lifting module of the present invention in the transition section;

[0029] Figure 5 It is a schematic diagram of the tea cake of the present invention when it is demoulded.

[0030] In the figure: 1. frame; 2. first cylinder; 3. silo; 4. stripping plate; 5. second cylinder; 6. fixed mold; 61. feeding section; 62. compression section; 63. transition section; 7. third cylinder; 71. cylinder body; 72. push rod; 8. lifting module; 81. inner plate; 811. inner body; 812. upper flange; 813. lower flange; 82. outer plate; 821. outer body; 822. middle flange; 823. slide groove; 8231. lower groove; 8232. upper groove; 83. slider; 84. spring; 9. movable mold; 10. pressure head; 11. tea cake. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 2 to 5 The present invention provides an automatic pressing and forming platform for tea pressing equipment, and the technical solution is as follows:

[0033] An automatic pressing and forming platform of tea pressing equipment cooperates with a pressing head 10 to press loose tea into tea cakes 11, comprising a frame 1, a first cylinder 2, a silo 3, a stripping plate 4, a second cylinder 5, a fixed die 6, a third cylinder 7, a material lifting module 8 and a movable die 9, wherein the first cylinder 2 is connected to the top of the frame 1, and the silo 3 is installed on the right side of the first cylinder 2. The present invention is used in conjunction with a feeder, and the feeder puts a certain amount of steamed loose tea into the silo 3 through an opening above the silo 3, and the stripping plate 4 is located on the right side of the silo 3. The second cylinder 5 is installed on the frame 1, and the second cylinder 5 is connected to the stripping plate 4, and drives the stripping plate 4 to move along the silo 3. Left-right sliding: when the tea cake 11 is pushed out to the top of the fixed mold 6, the stripper plate 4 is slid left-right to the left limit position by the second cylinder 5, so that the slot on its left side falls directly below the tea cake 11. When the tea cake 11 falls again, the stripper plate 4 receives the bottom surface of the tea cake 11 to complete the demoulding. The fixed mold 6 is installed on the frame 1, and the fixed mold 6 includes a feeding section 61 and a compression section 62 from top to bottom. The third cylinder 7 includes a cylinder body 71 and a push rod 72. The cylinder body 71 is located below the fixed mold 6. The push rod 72 is inserted into the fixed mold 6 from the lower end of the fixed mold 6. The lifting module 8 is connected to the upper end of the push rod 72. The movable mold 9 is on the left side of the fixed mold 6.

[0034] The movable mold 9 is pushed by the first cylinder 2 to push the loose tea fed into the silo 3 into the fixed mold 6. The lifting module 8 is pushed by the push rod 72 to quickly reciprocate in the compression section 62 to evenly spread the loose tea. The lifting module 8 lifts the tea cake 11 to the top of the fixed mold 6 and shrinks its diameter when passing through the feeding section 61 to be demoulded.

[0035] As an embodiment of the present invention, refer to Figures 2 to 5The lifting module 8 includes an inner plate 81, an outer plate 82, a slider 83 and a spring 84. The inner plate 81 includes an inner body 811, an upper flange 812 and a lower flange 813. The inner body 811, the upper flange 812 and the lower flange 813 are an integrated structure. During manufacturing, a cylindrical blank with a diameter larger than the outer diameter of the upper flange 812 is used as a raw material. The upper flange 812 and the lower flange 813 are obtained by step-by-step turning. As another production method, if mass production is carried out, it can also be The mold is opened for production to improve production efficiency. The inner body 811 is connected to the upper end of the push rod 72. The upper flange 812 and the lower flange 813 are arranged on the circumference of the inner body 811 from top to bottom. The outer plate 82 includes an outer body 821, a middle flange 822 and a slide groove 823. The outer body 821, the middle flange 822 and the slide groove 823 are also an integrated structure. The specific production method is the same as that of the inner plate 81. When the inner plate 81 is connected to the outer plate 82, the inner ring of the outer body 821 fits the upper flange. The outer ring of the outer body 821 is formed by the outer ring of the outer body 821, and the upper end surface of the outer body 821 coincides with the upper end surface of the upper flange 812, so that when the tea cake 11 is pressed, the molding surface of the tea cake 11 is flush and there is no obvious gap. The outer peripheral surface of the outer body 821 fits the inner wall of the compression section 62. The outer peripheral surface of the outer body 821 can be turned or milled to obtain a curved surface consistent with the curvature of the inner wall of the compression section 62. The middle flange 822 is set on the inner ring of the outer body 821. The outer diameter of the upper flange 812 and the middle convex The inner diameter of the flange 822 and the outer diameter of the lower flange 813 decrease successively, the inner diameter of the feed section 61 is larger than the inner diameter of the compression section 62, and a plurality of slide grooves 823 are arranged in a circumferential array on the outer plate 82, so that the outer plate 82 is subjected to uniform force everywhere, and the outer plate 82 is prevented from tilting due to local pressure. The slide grooves 823 include a lower groove 8231 and an upper groove 8232 from bottom to top, the lower groove 8231 passes through the outer body 821 and the middle flange 822, and the slider 83 is inserted into the lower groove 8231. Figure 5 The partial enlarged view at the lower right shows that the lower groove 8231 and the slider 83 are connected by the sliding structure on the sides of the two. The spring 84 is placed in the upper groove 8232 and is located between the inner wall of the upper groove 8232 and the slider 83. The upper groove 8232 has a rod-shaped structure inside to receive the spring 84. After the rod-shaped structure of the upper groove 8232 is inserted into the slider 83, a nut is used to cover the protruding end of the rod-shaped structure to limit the resetting of the spring 84, thereby preventing the slider 83 from detaching from the inside of the outer plate 82.

[0036] When installing the lifting module 8 into the fixed mold 6, first connect the slider 83 and the spring 84 to the inside of the outer plate 82, then place the outer plate 82 horizontally from the upper mouth of the fixed mold 6, and then control the push rod 72 of the third cylinder 7 to move upward in its entirety, and finally connect the inner plate 81 to the upper end of the push rod 72, and wait for the inner plate 81 to move downward again to start the production of the tea cake 11.

[0037] As an embodiment of the present invention, refer to Figure 3, the outer lower edge of the upper flange 812 is chamfered, and the outer upper edge of the upper flange 812 and the inner upper edge of the outer body 821 are not chamfered; when demoulding, the push rod 72 drives the inner plate 81 downward, and the stripping plate 4 uses its own card slot to push the tea cake 11 down. During the pushing and falling process, the contact area between the tea cake 11 and the stripping plate 4 should be as large as possible to prevent the local force from pushing the tea cake 11 that has not yet dried and solidified apart. However, in the prior art, in order to control the equipment cost, the second cylinder 5 and the stripping plate 4 are simply connected, that is, the stripping plate 4 will have a small Therefore, in order to avoid interference between the inner plate 81 and the stripping plate 4 during demoulding, a sufficient gap is usually left between the slot on the stripping plate 4 and the upper flange 812; in this solution, with the help of the chamfer at the lower edge of the upper flange 812, the stripping plate 4 can be guided, and even if the position of the inner plate 81 and the stripping plate 4 interfere, no violent collision will occur to cause damage to the inner plate 81 or the stripping plate 4. Therefore, the gap between the slot on the stripping plate 4 and the upper flange 812 can be further reduced, so that the tea cake 11 has a greater contact with the stripping plate 4, thereby obtaining a better demoulding effect.

[0038] As an embodiment of the present invention, refer to Figure 4 and Figure 5 The fixed mold 6 also includes a transition section 63, which is located between the feeding section 61 and the compression section 62. The outer plate 82 falls on the transition section 63 after being separated, and the inner plate 81 re-engages with the outer plate 82 during the downward movement after demoulding: the lower end surface of the upper flange 812 of the inner plate 81 is pressed against the upper end surface of the middle flange 822 of the outer plate 82 to drive the outer plate 82 to move downward; during the downward movement of the outer plate 82, the inner wall of the transition section 63 gradually squeezes the slider 83 toward the central axis of the transition section 63, so that the lower end surface of the slider 83 The end face gradually fits with the upper end face of the lower flange 813 until the slider 83 moves downward into the compression section 62 and completes the overlap. The angle between the inner wall contour of the transition section 63 and the vertical direction in the longitudinal section is recorded as α, and α<45°. In this method, in order to make the slider 83 pass through the transition section 63 more smoothly while taking into account the friction between the slider 83 and the transition section 63, a compromise value is taken, so α=22.5°, and the inner lower edge of the movable mold 9 is set to a chamfer with an angle of 22.5° with the vertical direction.

[0039] As an embodiment of the present invention, refer to Figure 3 The lower end surface of the slider 83 is set to a stepped surface structure, and the outer side of the lower end surface of the slider 83 is higher than the inner side. The height difference is reasonably selected according to the height of the slider 83 to avoid the influence of excessive height difference on the structural strength of the slider 83. The outer lower edge of the slider 83 is set to a chamfer with an angle of 22.5° with the vertical direction.

[0040] As an embodiment of the present invention, refer to Figure 2The third cylinder 7 is a two-stage cylinder, and the first-stage stroke distance value of the third cylinder 7 is smaller than the height value of the compression stage 62. The third cylinder 7 has a speed regulating function. The third cylinder 7 can be purchased directly. If there is a stock cylinder with the same full-stage stroke as the third cylinder 7, the stroke can be adjusted and the speed can be adjusted by cooperating with the solenoid valve.

[0041] Working principle: The present invention is conceived from the principle of "plurality". Under the push of the third cylinder 7, the material lifting module 8 can not only push the pressed tea cake 11 out of the fixed mold 6 for demoulding, but also level the uneven loose tea inside the fixed mold 6 by quickly reciprocating up and down. The difficulty of the above conception lies in changing the diameter value of the material lifting module 8 (that is, the receiving area of ​​the tea leaves in the fixed mold 6 is changed): when leveling the tea leaves, the material lifting module 8 fits with the inner wall of the fixed mold 6 to prevent the tea leaves from falling under the material lifting module 8 and affecting the normal operation of the equipment; when pushing out the tea cake 11, the diameter of the material lifting module 8 is reduced to leave part of the bottom surface of the tea cake 11, and cooperate with the demoulding plate 4 for demoulding;

[0042] Specifically, the lifting module 8 is designed to be two detachable parts: an inner plate 81 and an outer plate 82. The inner plate 81 is always connected to the upper end of the push rod 72 and moves synchronously with the push rod 72. The outer plate 82 is engaged with the inner plate 81 when the tea leaves are leveled and separated from the inner plate 81 when the tea cakes 11 are pushed out. More specifically, the inner plate 81 is provided with an upper flange 812 and a lower flange 813, and the outer plate 82 is provided with a middle flange 822 and a slide groove 823. The outer plate 82 and the inner plate 81 are connected to each other. When the plates 81 are joined: the lower end surface of the upper flange 812 falls on the upper end surface of the middle flange 822, the slider 83 is inserted from the slide groove 823, and its lower end surface falls on the upper end surface of the lower flange 813, and the outer periphery of the slider 83 is pressed against the inner wall of the compression section 62 of the fixed mold 6; in this way, the outer plate 82 and the inner plate 81 after joining make a rapid reciprocating motion in the first stroke of the third cylinder 7, so as to shake the tea leaves on the outer plate 82 and the inner plate 81 evenly;

[0043] After the pressing head 10 has pressed the tea cake 11 into shape, the push rod 72 of the third cylinder 7 moves upward slowly and completes two strokes to push the tea cake 11 out for demoulding. In the above process, before the tea cake 11 is demoulded, the outer plate 82 must be separated first. The specific process is as follows: a spring 84 is arranged between the slider 83 and the outer plate 82. When the slider 83 moves upward from the compression section 62 to the transition section 63, the diameter of the inner wall of the transition section 63 will gradually increase. Accordingly, the slider 83 continues to maintain close contact with the inner wall of the transition section 63 under the action of the spring 84, so that the lower end face of the slider 83 gradually separates from the upper end face of the lower flange 813. After complete separation, the inner plate 81 continues to move upward under the push of the push rod 72, while the outer plate 82 stays inside the transition section 63 to wait for re-engagement with the inner plate 81.

[0044] During demoulding, the demoulding plate 4 moves to the left under the action of the second cylinder 5, so that the slot on the demoulding plate 4 is located below the tea cake 11. After the push rod 72 moves downward to complete the demoulding of the tea cake 11, the demoulding plate 4 moves to the right and resets. In the above process, by means of the chamfering of the lower edge of the upper flange 812, the demoulding plate 4 can further reduce the gap with the peripheral surface of the upper flange 812 to obtain a better demoulding effect.

[0045] After demoulding, the push rod 72 drives the inner plate 81 to move downward slowly to reduce the collision with the outer plate 82. When the inner plate 81 and the outer plate 82 are re-engaged, the lower end surface of the upper flange 812 falls on the upper end surface of the middle flange 822 to drive the outer plate 82 to move downward. In the process of the outer plate 82 moving downward, the slider 83 is affected by the tightening shape of the inner wall of the transition section 63 and gradually moves toward the central axis of the fixed mold 6, so that the lower end surface of the slider 83 is gradually aligned with the upper end surface of the lower flange 813 again. Gradually fit; in the above process, in order to prevent the outer plate 82 from moving down excessively in the fixed mold 6 after it separates from the inner plate 81, so that the slider 83 moves closer to the central axis of the fixed mold 6 in advance, resulting in the lower end surface of the lower flange 813 pressing against the upper end surface of the slider 83 when the outer plate 82 and the inner plate 81 are combined, resulting in the phenomenon that the combination cannot be achieved, it is necessary to increase the friction between the slider 83 and the inner wall of the transition section 63, so a chamfer with the same slope as the inner wall of the transition section 63 is set on the outer lower edge of the slider 83;

[0046] After the push rod 72 descends to the limit position, the movable mold 9 moves to the left under the action of the first cylinder 2, and the feeding equipment feeds the steamed loose tea into the silo 3 in a quantitative manner. Then the movable mold 9 moves to the right to push the loose tea in the silo 3 into the fixed mold 6. During the pushing process, the movable mold 9 can provide a certain upward bearing force for the surrounding tea leaves by means of the chamfer of its own inner lower edge, so as to reduce the wear of the tea leaves and thereby improve the quality of the tea cake 11; thereafter, the above process is repeated.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic pressing and forming platform of tea pressing equipment, which cooperates with a pressing head (10) to press loose tea into tea cakes (11), comprises a frame (1), a first cylinder (2), a silo (3), a stripping plate (4) and a second cylinder (5), characterized in that: It also comprises a fixed mold (6), a third cylinder (7), a material lifting module (8) and a movable mold (9), wherein the fixed mold (6) is mounted on the frame (1), and the fixed mold (6) comprises a feeding section (61) and a compression section (62) from top to bottom, the third cylinder (7) comprises a cylinder body (71) and a push rod (72), the cylinder body (71) is located below the fixed mold (6), the push rod (72) is inserted into the fixed mold (6) from the lower end of the fixed mold (6), the material lifting module (8) is connected to the upper end of the push rod (72), and the movable mold (9) is on the left side of the fixed mold (6); The movable mold (9) is pushed by the first cylinder (2) to push the loose tea from the feeding bin (3) into the fixed mold (6); the lifting module (8) is pushed by the push rod (72) to quickly reciprocate in the compression section (62) to evenly spread the loose tea; and the lifting module (8) lifts the tea cake (11) to the top of the fixed mold (6) and shrinks its diameter when passing through the feeding section (61) to be demoulded; The lifting module (8) comprises an inner plate (81), an outer plate (82), a sliding block (83) and a spring (84); the inner plate (81) comprises an inner body (811), an upper flange (812) and a lower flange (813); the inner body (811) is connected to the upper end of the push rod (72); the upper flange (812) and the lower flange (813) are arranged on the circumference of the inner body (811) in sequence from top to bottom; the outer plate (82) comprises an outer body (821), a middle flange (822) and a sliding groove (823); the outer circumference of the outer body (821) is attached to the push rod (72); The inner wall of the compression section (62) is closed, the middle flange (822) is arranged on the inner circumferential surface of the outer body (821), a plurality of the slide grooves (823) are arranged in a circumferential array on the outer plate (82), the slide grooves (823) include a lower groove (8231) and an upper groove (8232) from bottom to top, the lower groove (8231) passes through the outer body (821) and the middle flange (822), the slider (83) is inserted into the lower groove (8231), and the spring (84) is placed in the upper groove (8232) and is located between the inner wall of the upper groove (8232) and the slider (83); The outer diameter of the upper flange (812), the inner diameter of the middle flange (822) and the outer diameter of the lower flange (813) decrease in sequence, and the inner diameter of the feed section (61) is greater than the inner diameter of the compression section (62).

2. The automatic pressing and forming platform of the tea pressing equipment according to claim 1, characterized in that: The outer lower edge of the upper flange (812) is chamfered, while the outer upper edge of the upper flange (812) and the inner upper edge of the outer body (821) are not chamfered.

3. The automatic pressing and forming platform of the tea pressing equipment according to claim 1, characterized in that: The fixed die (6) further comprises a transition section (63), the transition section (63) being located between the feeding section (61) and the compression section (62), the angle between the inner wall profile of the transition section (63) and the vertical direction in the longitudinal cross section being α, and α<45°, and the inner lower edge of the movable die (9) being arranged as a chamfer having an angle of α with the vertical direction.

4. The automatic pressing and forming platform of the tea pressing equipment according to claim 3, characterized in that: The lower end surface of the slider (83) is arranged as a stepped surface structure, and the outer side of the lower end surface of the slider (83) is higher than the inner side, and the outer lower edge of the slider (83) is arranged as a chamfer with an angle α with the vertical direction.

5. The automatic pressing and forming platform of the tea pressing equipment according to claim 1, characterized in that: The third cylinder (7) is a two-stage cylinder, and the first-stage stroke distance value of the third cylinder (7) is smaller than the height value of the compression stage (62), and the third cylinder (7) has a speed regulation function.

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