A rotary tablet press and a control method

Abstract

The present invention provides a rotary tablet press and a control method, which relates to the technical field of tablet press equipment. The rotary tablet press includes a rotary table, and the rotary table is provided with molds. Above the rotary table, a filling device and a stamping device are provided. The filling device fills materials into the molds. The stamping device is used to press the materials in the molds. The stamping device is provided with a replenishing device, and the replenishing device is used to replenish materials into the molds before pressing. Most of the materials are filled into the molds through the filling device. For the molds lacking materials, the replenishing device replenishes materials into the molds. This replenishing process is executed when the stamping device moves downward close to the molds and does not contact the molds, which is equivalent to using the startup time of the stamping device to achieve the replenishing operation. It not only does not need to slow down the rotation speed of the rotary table, improving the product output, but also utilizes the startup time of the stamping device to ensure that there is sufficient material in the molds during pressing, thus ensuring the product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of tablet press equipment, and particularly relates to a rotary tablet press and a control method thereof. Background Art

[0002] In the pharmaceutical industry, a tablet press presses pharmaceutical powders or granules into tablets; the tablet press generally includes steps of feeding, filling, pressing, and discharging tablets. At present, in the process of pursuing high production, the tablet press often encounters product quality problems. Especially when the rotating speed of the turntable is too fast, it may lead to insufficient filling amount, affecting the weight and thickness of the tablets, and further affecting their quality and efficacy. Specifically: when the rotating speed of the turntable of the tablet press increases, the filling time for each die hole decreases accordingly. If the filling time is not enough to fully fill the die hole with the pharmaceutical powder or granules, it will result in insufficient filling amount; especially when pressing large tablets, since the volume of the die hole is large, more pharmaceutical powder or granules are required to fill it, so the problem of insufficient filling amount is more obvious. Summary of the Invention

[0003] The purpose of the present invention is to provide a rotary tablet press and a control method thereof, and the technical problem to be solved is how to ensure the filling amount in the die hole while pursuing high production.

[0004] The present invention is achieved by the following technical solutions:

[0005] In a first aspect, a rotary tablet press is provided, which includes a rotating table, and the rotating table is provided with dies.

[0006] Above the rotating table, a filling device and a pressing device are provided. The filling device fills materials into the dies; the pressing device is used to press the materials in the dies.

[0007] The pressing device is provided with a supplementary feeding device, and the supplementary feeding device is used to supplement materials to the dies before pressing.

[0008] Most of the materials are filled into the dies through the filling device. For the dies with material shortage, the supplementary feeding device supplements materials into the dies. This supplementary feeding process is executed when the pressing device moves downward close to the dies and does not contact the dies, which is equivalent to using the start-up time of the pressing device to implement the supplementary feeding operation; it not only does not slow down the rotating speed of the turntable, improving the product output, but also utilizes the start-up time of the pressing device to ensure sufficient materials in the dies during pressing, ensuring the product quality.

[0009] Further, the filling device includes a hopper, a filling head, a filling pipe, and a track. The two ends of the filling pipe are respectively connected to the hopper and the filling head, and the materials are conveyed from the hopper to the filling head through the filling pipe.

[0010] The above filling head is arranged on the track, and the above filling head moves above the mold along the track;

[0011] When filling the material, the above filling head rotates synchronously with the rotary table along the track, and the filling head faces the mold.

[0012] Through the above track, the filling head rotates synchronously with the rotary table, and the filling head always faces the mold in the filling area, extending the filling time and ensuring the filling amount to a certain extent.

[0013] Further, the above filling head includes a stock preparation pipe, a discharge pipe, an air pipe and an air pump. The input end of the stock preparation pipe is connected to the output end of the filling pipe through a first valve, the output end of the stock preparation pipe is connected to the input end of the discharge pipe through a second valve, the input end of the air pipe is connected to the air pump, and the output end of the air pipe communicates with the stock preparation pipe;

[0014] When filling the material, open the second valve and the air pump.

[0015] The material in the stock preparation pipe is ejected through the above air pump to accelerate the filling speed of the material, thereby increasing the filling amount of the material; the amount of material is prepared in advance through the stock preparation pipe to prevent excessive material from entering the mold.

[0016] Further, the above stock preparation pipe includes a first stock preparation chamber and a second stock preparation chamber. The first stock preparation chamber and the second stock preparation chamber communicate with each other, and a third valve is arranged at the connection between the first stock preparation chamber and the second stock preparation chamber; the first stock preparation chamber communicates with the filling pipe through the first valve, and the first valve is always open; the second stock preparation chamber communicates with the discharge pipe through the second valve;

[0017] When filling the material, open the above second valve and the air pump, and close the third valve;

[0018] When the material filling is completed, close the above second valve and the air pump, and open the third valve.

[0019] Two stock preparation chambers are provided, and the first valve is always open, so that the first stock preparation chamber can continuously prepare materials; due to the high-speed operation of the rotary table, it is necessary to accelerate the transfer speed of the materials in the first stock preparation chamber to the second stock preparation chamber. Therefore, when the first stock preparation chamber and the second stock preparation chamber communicate, the air pump is used to jet air into the first stock preparation chamber, so that the materials in the first stock preparation chamber are jetted into the second stock preparation chamber to accelerate the transfer speed.

[0020] Further, the above discharge pipe is provided with a material shielding piece; when filling the material, the output end of the above discharge pipe extends into the chamber of the mold, and the material shielding piece contacts the upper surface of the mold to seal the chamber of the mold.

[0021] In order to avoid material leakage, a material shielding piece is provided on the discharge pipe, so that the material is in a sealed environment when it is sprayed into the mold, and the problem of material scattering is solved.

[0022] Further, the trachea includes a first branch trachea and a second branch trachea. The first branch trachea communicates with the first stock preparation chamber, and a fourth valve is provided on the first branch trachea; the second branch trachea communicates with the second stock preparation chamber, and a fifth valve is provided on the second branch trachea;

[0023] When filling the material, close the fourth valve and open the fifth valve;

[0024] When the filling of the material is completed, open the fourth valve and close the fifth valve.

[0025] Normally, gas is alternately sprayed into the first stock preparation chamber and the second stock preparation chamber. When spraying gas into the first stock preparation chamber, the gas flows to the second stock preparation chamber, and then gas is sprayed into the second stock preparation chamber, and the gas flows to the mold; when the material baffle leaves the mold, the gas leaks out of the mold, reducing the air pressure change caused by the gas.

[0026] Further, the feeding device includes a feeding pipe and a feeding head. The hopper and the feeding head are connected through the feeding pipe, and a sixth valve is provided on the feeding head; when feeding the material, open the sixth valve.

[0027] In a second aspect, a control method is provided, and the control method is used to control the above-mentioned rotary tablet press;

[0028] The control method includes the following steps:

[0029] Obtain the working area of the rotary tablet press, divide the working area, and obtain a filling area, a feeding area, and a pressing area;

[0030] When the above-mentioned mold enters the filling area, a filling instruction is generated; the filling device fills the mold with material based on the filling instruction;

[0031] When the above-mentioned mold enters the feeding area, a feeding instruction and a stamping instruction are generated. The stamping device moves downward close to the mold based on the stamping instruction; the feeding device supplements the mold with material based on the feeding instruction;

[0032] When the above-mentioned mold enters the pressing area, the stamping device presses the material in the mold based on the stamping instruction to form tablets.

[0033] Further, before generating the above-mentioned filling instruction, it is also necessary to determine whether there is material in the stock preparation pipe. The specific steps include:

[0034] Detect whether there is material in the first stock preparation chamber; if not, open the first valve; if so, then:

[0035] Detect whether there is material in the second stock preparation chamber; if not, open the third valve and the fourth valve; if so, determine that there is material in the stock preparation pipe;

[0036] After determining that there is material in the above-mentioned stock preparation pipe, determine whether to generate a filling instruction. The specific steps include:

[0037] Obtain the spatial coordinates of the above-mentioned filling head and the spatial coordinates of the mold, and determine whether the above-mentioned filling head is facing the mold directly;

[0038] When the above-mentioned filling head is facing the mold directly, generate a filling instruction and a movement instruction;

[0039] Based on the filling instruction, the above-mentioned filling head opens the second valve, the fifth valve and the air pump, and the filling head moves synchronously with the rotating table based on the movement instruction.

[0040] Detect the stock preparation situation in real time, prepare materials in time, and prevent the mold from having no filling situation caused by shortage of stock preparation.

[0041] Furthermore, the specific steps for generating the above-mentioned replenishment instruction include:

[0042] Obtain the amount of material in the above-mentioned mold to obtain the collected material amount;

[0043] The above-mentioned replenishment device is configured with a preset material amount;

[0044] Based on the above-mentioned preset material amount and the collected material amount, determine the amount of material to be replenished;

[0045] Based on the above-mentioned amount of material to be replenished, generate a replenishment instruction;

[0046] Based on the replenishment instruction, the above-mentioned replenishment device opens the sixth valve.

[0047] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0048] Most of the material is filled into the mold through the above-mentioned filling device. For the mold with material shortage, the replenishment device is used to supplement the material into the mold. This replenishment process is executed when the stamping device moves downward close to the mold and does not contact the mold. It is equivalent to using the start-up time of the stamping device to realize the replenishment operation; neither the rotation speed of the rotating table needs to be slowed down, which improves the product output, nor the start-up time of the stamping device is utilized to ensure that the material in the mold is sufficient during pressing, thus ensuring the product quality. Description of the Drawings

[0049] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0050] Figure 1It is a schematic structural diagram of a rotary tablet press;

[0051] Figure 2 It is a connection block diagram of a filling device and a replenishing device;

[0052] Figure 3 It is a control flow chart of a rotary tablet press.

[0053] Labels in the attached drawings and corresponding component names:

[0054] 1. Rotary table; 2. Mold; 3. Stamping device; 4. Filling device; 41. Track; 42. Filling head; 421. First stock preparation chamber; 422. Second stock preparation chamber; 423. Discharge pipe; 424. Air pump; 425. First branch air pipe; 426. Second branch air pipe; 427. Air pipe; 428. Material shielding piece; 43. Hopper; 44. Filling pipe; 5. Replenishing device; 51. Replenishing pipe; 52. Replenishing head; 61. First valve; 62. Second valve; 63. Third valve; 64. Fourth valve; 65. Fifth valve; 66. Sixth valve. Specific embodiments

[0055] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and the attached drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0056] First embodiment: A rotary tablet press, in combination with Figure 1 , includes a rotary table 1. Taking the central axis of the rotary table 1 as the center, the working area of the tablet press is divided into a filling area, a replenishing area, and a pressing area; a plurality of molds 2 are provided on the rotary table 1. The plurality of molds 2 can be connected to form a whole or exist independently; each mold 2 is provided with a chamber for accommodating materials, and the materials can be pharmaceutical powders or granules;

[0057] Above the rotary table 1, a filling device 4 and a stamping device 3 are provided. The filling device 4 is arranged in the filling area, and the filling device 4 fills materials into the mold 2; the stamping device 3 is arranged on the rotary table 1, and the rotary table 1 drives the stamping device 3 to rotate. The mold 2 corresponds to the stamping device 3 one by one, and the stamping device 3 is used to press the materials in the mold 2 to ensure that each product can reach the expected shape.

[0058] A replenishing device 5 is arranged beside the stamping device 3, and the replenishing device 5 is used to replenish materials into the mold 2 before pressing. By means of the replenishing device 5, the defective rate caused by insufficient material filling is reduced, thereby improving the qualified rate and overall quality of the products.

[0059] Most of the materials are filled into the mold 2 through the above filling device 4. For the mold 2 lacking materials, the feeding device 5 is used to supplement the materials into the mold 2. This feeding process is carried out when the stamping device 3 moves downward close to the mold 2 and does not contact the mold 2. It is equivalent to using the starting time of the stamping device 3 to realize the feeding operation; neither slowing down the rotation speed of the rotary table 1 nor improving the product output, but also using the starting time of the stamping device 3 to ensure that there is sufficient material in the mold 2 during pressing, thus ensuring the product quality.

[0060] Second Embodiment: On the basis of the first embodiment, combined with Figure 2 , the above filling device 4 includes a hopper 43, a filling head 42, a filling pipe 44 and a track 41. The two ends of the above filling pipe 44 are respectively connected to the hopper 43 and the filling head 42, and the materials are conveyed from the hopper 43 to the filling head 42 through the above filling pipe 44; the hopper 43 serves as a storage and supply source of materials and is connected to the filling head 42 through the filling pipe 44, forming a continuous material conveying channel.

[0061] The above filling head 42 is arranged on the track 41. The track 41 can be arranged around the rotation center of the rotary table 1. When the filling head 42 runs synchronously with the rotary table 1 on the track 41 in the filling area, it is always located directly above the mold 2. The above filling head 42 moves above the mold 2 along the track 41; when filling materials, the above filling head 42 rotates synchronously with the rotary table 1 along the track 41, and the filling head 42 faces the mold 2. It means that during the rotation of the rotary table 1, the filling head 42 always faces the mold 2, and materials can be accurately filled when each mold 2 passes by. This synchronism extends the filling time to a certain extent and ensures the filling amount.

[0062] To enable the filling head 42 to automatically rotate synchronously with the rotary table 1 along the track 41, a driving wheel is arranged on the filling head 42. The driving wheel is connected to a driver, and the driver drives the driving wheel to rotate to realize the movement (the driving wheel and the driver can adopt existing equipment and programs, which will not be elaborated in this invention); since the filling head 42 can automatically move along the track 41 and rotate synchronously with the rotary table 1, the filling process can be completed without manual intervention, which not only improves the filling efficiency but also reduces the risk of uneven filling or insufficient filling caused by improper manual operation. By adjusting the parameters of the filling pipe 44, the filling head 42 and the track 41, the filling amount and filling speed of the materials can be controlled, which helps to maintain the consistency of the materials in each mold 2, thereby improving the product quality and qualification rate.

[0063] The above filling head 42, filling tube 44 and track 41 can be adjusted according to the production requirements of different products and the specifications of the mold 2, enabling the rotary tablet press to be applicable to a variety of different production scenarios and product types, improving the flexibility and adaptability of the equipment; the filling device 4 is easy to disassemble and clean, helping to maintain the hygiene and cleanliness of the equipment, preventing material contamination and cross-contamination.

[0064] Third embodiment: On the basis of the second embodiment, combined with Figure 2 , the above filling head 42 includes a stock preparation tube, a discharge tube 423, an air tube 427 and an air pump 424. The input end of the stock preparation tube is connected to the output end of the filling tube 44 through a first valve 61, and the output end of the stock preparation tube is connected to the input end of the discharge tube 423 through a second valve 62. The input end of the air tube 427 is connected to the air pump 424, and the output end of the air tube 427 communicates with the stock preparation tube;

[0065] When filling the material, open the second valve 62 and the air pump 424.

[0066] The material in the stock preparation tube is ejected by the above air pump 424 to accelerate the filling speed of the material, thereby increasing the material filling amount; the material amount is prepared in advance through the stock preparation tube to prevent excessive material from entering the mold 2.

[0067] Working process: The stock preparation tube serves as a temporary storage area for the material and is connected to the discharge tube 423 through the second valve 62. When filling the material, the second valve 62 is opened, and the material enters the discharge tube 423 from the stock preparation tube and is finally filled into the holes of the mold 2. The air pump 424 provides a certain pressure for the material in the stock preparation tube to help the material enter the discharge tube 423 more smoothly and maintain a certain tightness during the filling process, not only improving the filling speed but also helping to reduce the loss and waste of the material during the filling process. The pressure of the air pump 424 can be adjusted according to the properties of the material and the filling requirements. For materials with different densities and fluidities, the filling control can be achieved by adjusting the pressure of the air pump 424, enabling the rotary tablet press to be applicable to a variety of different material types and production requirements, improving the flexibility and adaptability of the equipment.

[0068] In a specific embodiment, the above stock preparation tube includes a first stock preparation chamber 421 and a second stock preparation chamber 422. The first stock preparation chamber 421 and the second stock preparation chamber 422 communicate with each other, and a third valve 63 is provided at the connection between the first stock preparation chamber 421 and the second stock preparation chamber 422; the first stock preparation chamber 421 communicates with the filling tube 44 through the first valve 61, and the first valve 61 is normally open; the second stock preparation chamber 422 communicates with the discharge tube 423 through the second valve 62;

[0069] When filling the material, open the above second valve 62 and the air pump 424, and close the third valve 63;

[0070] At the end of the material filling process, close the above-mentioned second valve 62 and the air pump 424, and open the third valve 63.

[0071] Two stock preparation chambers are provided. The above-mentioned first valve 61 is normally open, so that the first stock preparation chamber 421 can continuously prepare materials; due to the high-speed rotation of the rotary table 1, it is necessary to accelerate the transfer speed of the materials in the first stock preparation chamber 421 to the second stock preparation chamber 422. Therefore, when the first stock preparation chamber 421 and the second stock preparation chamber 422 are connected, the air pump 424 is used to jet air into the first stock preparation chamber 421, so that the materials in the first stock preparation chamber 421 are jetted into the second stock preparation chamber 422 to accelerate the transfer speed.

[0072] Filling process: (1) Filling preparation stage: The first valve 61 is normally open to ensure that materials can continuously enter the first stock preparation chamber 421 from the filling pipe 44; the third valve 63 is closed to prevent materials from freely flowing between the first stock preparation chamber 421 and the second stock preparation chamber 422 and maintain the independence of the two chambers; the second valve 62 is closed to prevent materials from entering the discharge pipe 423 in advance.

[0073] (2) Filling stage: When the rotary table 1 brings the hole of the mold 2 under the filling head 42, the second valve 62 is opened to allow materials to enter the hole of the mold 2 from the second stock preparation chamber 422 through the discharge pipe 423; at the same time, the air pump 424 is turned on to provide pressure for the materials in the second stock preparation chamber 422 (and possibly the second stock preparation chamber 422, depending on the connection position of the air pipe 427) to help the materials enter the discharge pipe 423 more smoothly; the third valve 63 remains closed to ensure that the materials do not flow back from the second stock preparation chamber 422 to the first stock preparation chamber 421 during the filling process.

[0074] (3) Filling end stage: When the hole of the mold 2 is filled or the predetermined filling time is reached, the second valve 62 is closed to stop the conveyance of materials to the hole of the mold 2; at the same time, the air pump 424 is turned off to stop providing pressure for the materials; the third valve 63 is opened to allow the materials in the first stock preparation chamber 421 to enter the second stock preparation chamber 422 to prepare for the next filling.

[0075] In a specific embodiment, the above-mentioned discharge pipe 423 is provided with a material shielding piece 428; when filling materials, the output end of the above-mentioned discharge pipe 423 extends into the chamber of the mold 2, and the material shielding piece 428 contacts the upper surface of the mold 2 to seal the chamber of the mold 2.

[0076] To avoid material leakage, a material shielding piece 428 is provided in the discharge pipe 423 so that the materials are in a sealed environment when sprayed into the mold 2, ensuring that the materials will not overflow or leak from the chamber of the mold 2 during the filling process, and at the same time ensuring that the materials can be filled into the chamber of the mold 2.

[0077] In a specific embodiment, the trachea 427 includes a first branch trachea 425 and a second branch trachea 426. The first branch trachea 425 communicates with the first stock preparation chamber 421, and a fourth valve 64 is provided on the first branch trachea 425. The second branch trachea 426 communicates with the second stock preparation chamber 422, and a fifth valve 65 is provided on the second branch trachea 426.

[0078] When filling the material, close the fourth valve 64 and open the fifth valve 65.

[0079] When the filling of the material is completed, open the fourth valve 64 and close the fifth valve 65.

[0080] Generally, gas is alternately injected into the first stock preparation chamber 421 and the second stock preparation chamber 422. When injecting gas into the first stock preparation chamber 421, the gas flows to the second stock preparation chamber 422, and then gas is injected into the second stock preparation chamber 422, and the gas flows to the mold 2. When the material baffle leaves the mold 2, the gas leaks out from the mold 2, reducing the pressure change caused by the gas.

[0081] Fourth embodiment: On the basis of any of the above embodiments, combined with Figure 2 , the feeding device 5 includes a feeding pipe 51 and a feeding head 52. The hopper 43 and the feeding head 52 are connected through the feeding pipe 51, and a sixth valve 66 is provided on the feeding head 52. When replenishing the material, open the sixth valve 66.

[0082] The feeding head 52 is composed of a vertical pipe and an inclined pipe. Combined with Figure 1 , the vertical pipe and the inclined pipe are communicated. The vertical pipe is connected to the feeding pipe 51 and extends towards the mold 2. The output end of the inclined pipe extends out of the working end of the stamping device 3, and the output end of the inclined pipe extends towards the central axis of the stamping device 3. An inclined plate is further provided on the vertical pipe, and a groove is provided on the lower surface of the inclined plate. The inclined plate extends away from the central axis of the stamping device 3. An inclined column that is engaged with the groove of the inclined plate is provided beside the mold 2. When the stamping device 3 moves downward, the inclined column gradually approaches and then abuts against the inclined plate. The stamping device 3 continues to move downward, and the feeding head 52 is expanded towards the side through the inclined column and the inclined plate. At this time, the inclined pipe leaves the working end of the stamping device 3, avoiding the inclined pipe from obstructing the pressing operation. To enable the feeding head 52 to expand towards the side smoothly, the feeding device 5 can be connected to the stamping device 3 through an elastic member, and the elastic member can be elastic rubber.

[0083] Fifth embodiment: A control method, which is used to control the above-mentioned rotary tablet press; combined with Figure 3 ,

[0084] This control method includes the following steps:

[0085] Obtain the working area of the rotary tablet press, divide the working area, and obtain a filling area, a feeding area, and a pressing area;

[0086] When the above-mentioned mold 2 enters the filling area, a filling instruction is generated; the above-mentioned filling device 4 fills the mold 2 with materials based on the filling instruction;

[0087] When the above-mentioned mold 2 enters the feeding area, a feeding instruction and a stamping instruction are generated. The above-mentioned stamping device 3 moves downward close to the mold 2 based on the stamping instruction; the above-mentioned feeding device 5 supplements the mold 2 with materials based on the feeding instruction;

[0088] When the above-mentioned mold 2 enters the pressing area, the above-mentioned stamping device 3 applies pressure to the materials in the mold 2 based on the stamping instruction to make tablets.

[0089] By dividing the working area and generating corresponding control instructions, the materials are filled, fed, and pressed at the correct positions, thereby improving the production efficiency of the tablet press and the quality of the tablets. At the same time, the control method also has flexibility and scalability, and can be adjusted and optimized according to different production requirements and material characteristics.

[0090] In a specific embodiment, before generating the above-mentioned filling instruction, it is also necessary to determine whether there are materials in the stock preparation pipe. The specific steps include:

[0091] Detect whether there are materials in the above-mentioned first stock preparation chamber 421; if not, open the first valve 61; if so, then:

[0092] Detect whether there are materials in the second stock preparation chamber 422; if not, open the third valve 63 and the fourth valve 64; if so, determine that there are materials in the stock preparation pipe;

[0093] After determining that there are materials in the above-mentioned stock preparation pipe, determine whether to generate a filling instruction. The specific steps include:

[0094] Obtain the spatial coordinates of the above-mentioned filling head 42 and the spatial coordinates of the mold 2, and determine whether the filling head 42 is directly facing the mold 2;

[0095] When the above-mentioned filling head 42 is directly facing the mold 2, generate a filling instruction and a movement instruction;

[0096] The above-mentioned filling head 42 opens the second valve 62, the fifth valve 65 and the air pump 424 based on the filling instruction, and the filling head 42 moves synchronously with the rotary table 1 based on the movement instruction.

[0097] Real-time detect the stock preparation situation, and prepare materials in time to prevent the situation that the mold 2 has no filling due to shortage of stock preparation.

[0098] In a specific embodiment, the specific generation steps of the above-mentioned feeding instruction include:

[0099] Obtain the amount of material in the above-mentioned mold 2 to obtain the collected material amount;

[0100] The above-mentioned replenishing device 5 is configured with a preset material amount;

[0101] Based on the difference between the above-mentioned preset material amount and the collected material amount, determine the material amount to be replenished;

[0102] Generate a replenishing instruction based on the above-mentioned material amount to be replenished;

[0103] The above-mentioned replenishing device 5 opens the sixth valve 66 based on the replenishing instruction.

[0104] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary tablet press, characterized in that: It comprises a rotating table (1), wherein the rotating table (1) is provided with a mold (2); A filling device (4) and a punching device (3) are arranged above the rotating table (1); the filling device (4) is used to fill the material into the mold (2); and the punching device (3) is used to press the material in the mold (2); The punching device (3) is provided with a material replenishing device (5), and the material replenishing device (5) is used to replenish material to the mold (2) before pressing; The filling device (4) comprises a hopper (43), a filling head (42), a filling pipe (44) and a track (41); two ends of the filling pipe (44) are respectively connected to the hopper (43) and the filling head (42); materials are transported from the hopper (43) to the filling head (42) through the filling pipe (44); The filling head (42) is arranged on the track (41), and the filling head (42) moves along the track (41) above the mold (2); When filling the material, the filling head (42) rotates synchronously with the rotating table (1) along the track (41), and the filling head (42) faces the mold (2); The filling head (42) comprises a material preparation pipe, a material discharge pipe (423), an air pipe (427) and an air pump (424); the input end of the material preparation pipe is connected to the output end of the filling pipe (44) via a first valve (61); the output end of the material preparation pipe is connected to the input end of the material discharge pipe (423) via a second valve (62); the input end of the air pipe (427) is connected to the air pump (424); and the output end of the air pipe (427) is in communication with the material preparation pipe; When filling the material, the second valve (62) and the air pump (424) are opened; The material preparation pipe comprises a first material preparation chamber (421) and a second material preparation chamber (422), the first material preparation chamber (421) and the second material preparation chamber (422) being connected, and a third valve (63) is provided at the connection between the first material preparation chamber (421) and the second material preparation chamber (422); the first material preparation chamber (421) is connected to the filling pipe (44) via the first valve (61), and the first valve (61) is normally open; the second material preparation chamber (422) is connected to the discharge pipe (423) via the second valve (62); When filling the material, the second valve (62) and the air pump (424) are opened, and the third valve (63) is closed; When the filling of the material is completed, the second valve (62) and the air pump (424) are closed, and the third valve (63) is opened; The air pipe (427) comprises a first branch air pipe (425) and a second branch air pipe (426); the first branch air pipe (425) is connected to the first material preparation chamber (421), and a fourth valve (64) is provided on the first branch air pipe (425); the second branch air pipe (426) is connected to the second material preparation chamber (422), and a fifth valve (65) is provided on the second branch air pipe (426); When filling the material, the fourth valve (64) is closed and the fifth valve (65) is opened; When the filling of materials is completed, the fourth valve (64) is opened and the fifth valve (65) is closed; The feeding device (5) comprises a feeding pipe (51) and a feeding head (52), the feeding pipe (51) connecting the hopper (43) and the feeding head (52), and the feeding head (52) is provided with a sixth valve (66); when replenishing materials, the sixth valve (66) is opened.

2. The rotary tablet press according to claim 1, characterized in that: The discharge pipe (423) is provided with a material shielding sheet (428); when filling the material, the output end of the discharge pipe (423) extends into the cavity of the mold (2), and the material shielding sheet (428) contacts the upper surface of the mold (2), thereby closing the cavity of the mold (2).

3. A control method, characterized in that: The control method is used to control the rotary tablet press according to any one of claims 1 to 2; The control method comprises the following steps: Obtaining an operating area of ​​a rotary tablet press, dividing the operating area into a filling area, a feeding area, and a pressing area; When the mold enters the filling area, a filling instruction is generated; and the filling device fills the material into the mold based on the filling instruction; When the mold enters the material replenishment area, a material replenishment instruction and a punching instruction are generated, and the punching device moves downward toward the mold based on the punching instruction; and the material replenishment device replenishes material to the mold based on the material replenishment instruction; When the mold enters the pressing area, the punching device applies pressure to the material in the mold based on the punching instruction to produce a sheet.

4. The control method according to claim 3, characterized in that: Before generating the filling instruction, it is also necessary to determine whether there is material in the material preparation pipe. The specific steps include: Check whether there is material in the first preparation chamber; if not, open the first valve; if yes, then: Detect whether there is material in the second material preparation chamber; if not, open the third valve and the fourth valve; if yes, determine that there is material in the material preparation pipe; After confirming that there is material in the preparation pipe, determine whether to generate a filling instruction. The specific steps include: Acquire the spatial coordinates of the filling head and the spatial coordinates of the mold to determine whether the filling head is facing the mold; When the filling head faces the mold, a filling instruction and a moving instruction are generated; The filling head opens the second valve, the fifth valve and the air pump based on the filling instruction, and the filling head moves synchronously with the rotating table based on the movement instruction.

5. The control method according to claim 3, characterized in that: The specific steps of generating the feeding instruction include: Obtaining the amount of material in the mold to obtain the amount of collected material; The feeding device is configured with a preset material amount; Determining the amount of material to be replenished based on the preset material amount and the collected material amount; Based on the amount of material to be replenished, generating a replenishment instruction; The feeding device opens the sixth valve based on the feeding instruction.

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