Tabletting forming device and using method thereof

Abstract

The invention discloses a tabletting forming device and a using method thereof, and belongs to the technical field of material forming devices. A mold displacement device; the mold shifting device is mounted on the rack and is used for moving the tabletting mold between the loading position and the tabletting position; the sampling device is used for collecting a powder sample through an unloading conveying pipe and conveying the sample into the tabletting mold; the tabletting device is mounted on the rack, the tabletting device comprises a bottom plate, a top plate and a pressing driving piece, and the bottom plate is connected with the top plate through a plurality of connecting pieces; the pressing driving part is mounted on the bottom plate, the pressing driving part is provided with a pressing rod corresponding to the upper pressing head, the pressing rod is provided with a mold closing spring, and the pressing rod is used for transmitting power of the pressing driving part to the upper pressing head to apply pressure to the tabletting mold; the electric control device is electrically connected with the mold shifting device, the sampling device and the tabletting device; the powder sample can be subjected to uniform and stable tabletting treatment, and the tabletting quality and consistency are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of material forming devices, and in particular relates to a tablet forming device and a use method thereof. Background Art

[0002] In modern industrial production, the quality inspection of powdered materials is a key link to ensure product performance and stability, especially in the fields of building materials, chemical products, etc. The quality of powdered materials is directly related to the performance, durability and reliability of the final product. Traditional powder inspection methods mainly rely on manual operations, especially in the sampling and tableting links, which have many problems and technical challenges.

[0003] First, the traditional manual tableting method often fails to ensure uniform pressure, resulting in inconsistent thickness and density of the sample tablets. This inconsistency will directly affect the accuracy of subsequent test results, making the test results unable to truly reflect the actual quality of the powder.

[0004] Secondly, manual operation is inefficient and cannot meet the needs of large-scale continuous production in modern industry. Manual tableting is not only slow, but also often leads to uneven tableting quality due to operator fatigue, lack of experience or differences in skill levels. The volatility caused by this human factor greatly affects the consistency and reliability of the test results. In addition, as the scale of production expands, the time and labor costs of manual operation also increase significantly, making it difficult to achieve efficient and economical production management.

[0005] In addition, there are certain safety hazards in the manual tableting process, especially when handling dangerous or environmentally sensitive powdered materials, the operator's safety protection requirements are high, and manual operation inevitably increases the safety risk. Therefore, it not only affects production efficiency, but may also cause production safety accidents, increasing the company's operating risks and costs. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to provide a tableting device and a method of using the same, which can provide uniform and stable pressure during the tableting process and can adapt to the needs of different types of powders.

[0007] To achieve the above object, the present invention provides the following technical solution: a tablet forming device, comprising: frame; A tablet pressing mold, the tablet pressing mold comprising an outer mold and a mold core, wherein the mold core is arranged inside the outer mold; A mold shifting device, the mold shifting device is mounted on the frame and is used to move the tableting mold between the loading and tableting positions; A sampling device, which collects powder samples through a discharge conveying pipe and conveys the samples to a tablet pressing mold; A tablet pressing device, the tablet pressing device is installed on a frame, the tablet pressing device includes a bottom plate, a top plate, a clamping drive, an upper pressure head, a pressure rod and a mold closing spring, the bottom plate is fixedly installed on the frame; the top plate is arranged opposite to the bottom plate, and the top plate is connected to the bottom plate through a connecting member; the clamping drive is installed on the frame for applying vertical pressure, the upper pressure head is installed on the top plate and connected to the tablet pressing mold; the pressure rod is arranged at the output end of the clamping drive to press the powder sample in the tablet pressing mold under the drive of the clamping drive; the mold closing spring is arranged on the pressure rod; an electric control device, the electric control device is electrically connected to the mold shifting device, the sampling device and the tablet pressing device.

[0008] Preferably, the mold shifting device comprises a driving mechanism and a mold bracket, the driving mechanism is fixed on a frame, the driving mechanism is connected to a moving part of the mold bracket, and the tablet pressing mold is mounted on the mold bracket.

[0009] Preferably, the driving mechanism is a linear driving mechanism, which includes a linear motion component, a guide assembly and a power assembly. The guide assembly is installed on a frame, and the power assembly drives the linear motion component to reciprocate along the track of the guide assembly to cause a linear displacement of the mold bracket, thereby the mold bracket drives the tablet pressing mold to move.

[0010] Preferably, the driving mechanism is a circular driving mechanism, which includes a circular motion module, and the mold bracket is connected to the circular motion component of the circular motion module, and the mold bracket is driven by the circular motion module to rotate to adjust the position of the tableting mold.

[0011] Preferably, the sampling device includes a feeding cylinder, a material collection cylinder, a material collection piston, a material collection drive and a sample storage cylinder, the two ends of the feeding cylinder are respectively connected to the unloading conveying pipe of the powder tank truck, the material collection cylinder includes a material collection section and a unloading section, the material collection section is located inside the feeding cylinder, and the material collection section is provided with a material collection port; the unloading section is provided with a unloading port, and a first valve is provided below the unloading port, and the sample storage cylinder is connected below the first valve.

[0012] Preferably, the sampling device further comprises a pressure relief valve, and the pressure relief valve is arranged on the sample storage cylinder.

[0013] Preferably, the tablet pressing device further comprises a force sensor, and the force sensor is arranged between the upper pressing head and the top plate.

[0014] Preferably, the tablet molding device also includes a demolding device, which includes a mold limiting mechanism, a demolding ejector rod and a demolding power member. The mold limiting mechanism fixes the outer mold of the tableting mold, and the demolding power member drives the demolding ejector rod to eject the sample tablet from the tableting mold.

[0015] Preferably, the tablet forming device further comprises a core resetting device, and the core resetting device comprises: Mold core resetting drive component; A mold core pressure rod, the output end of the mold core reset driving member is connected to the mold core pressure rod, and the power is transmitted to the mold core through the mold core pressure rod; An elastic member is arranged at the front end of the mold core pressure rod.

[0016] Another aspect of the present invention provides the following technical solution: a method for using a tablet forming device, comprising the following steps: The electronic control device issues a sampling instruction; The pressure sensor detects the pressure in the feeding cylinder and transmits the pressure signal to the electronic control device; The sampling device performs sampling operation, and the powder enters the sample storage cylinder through the first valve; The mold shifting device moves the tablet pressing mold to the loading position, and the powder in the sample storage cylinder is loaded into the tablet pressing mold; The tablet pressing device tablets the sample; The mold shifting device moves the tablet pressing mold to the demoulding position, and the demoulding device ejects the sample tablet from the tablet pressing mold; The mold core resetting device resets the mold core to the initial position.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: by adopting a tabletting mold and a tabletting device with a stable structure, the device can perform uniform and stable tabletting on powder samples. In particular, through the design of the pressing drive and the pressing rod, it is ensured that the pressure applied during the tabletting process can be accurately transmitted to the upper pressing head, thereby achieving uniform pressing of the sample. The auxiliary effect of the mold clamping spring further ensures the smooth application of pressure, reduces fluctuations during the tabletting process, and thus ensures the quality and consistency of the tabletting.

[0018] The tableting device realizes overall control of the mold shifting device, the sampling device and the tableting device through an electronic control device. The operation process not only reduces manual intervention and reduces the workload of operators, but also greatly improves production efficiency, especially in large-scale production, it can significantly improve the speed and consistency of tableting operations.

[0019] The die shifting device can smoothly move the tableting die between the loading and tableting positions, making the device flexible to adapt to different production needs. Whether in the sampling stage of powder samples or in the tableting operation stage, it can be accurately controlled by the electronic control device to adapt to the characteristics of different types of powders.

[0020] Through the precise sampling of the sampling device and the efficient pressing of the tablet pressing device, the entire tablet pressing device can complete high-quality sample processing in a short time, ensuring the accuracy and reliability of subsequent test results. At the same time, it also reduces the impact of human factors on the operation results, further improving the overall efficiency of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0023] Figure 3 It is a left-side structural schematic diagram of the present invention.

[0024] Figure 4 It is a schematic diagram of the tablet pressing mold structure of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the mold shifting device of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the sampling device of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the tablet pressing device of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of the detection device of the present invention.

[0029] Fig. 9 It is a schematic structural diagram of the mold limiting mechanism of the present invention.

[0030] Fig.10 It is a schematic diagram of the installation structure of the scraper member of the present invention.

[0031] Fig.11 It is a structural schematic diagram of the mold core resetting device of the present invention.

[0032] Fig.12 It is a schematic diagram of the installation structure of the circular drive mechanism of the present invention.

[0033] Fig.13 This is a reference diagram of the scraper member of the present invention in use.

[0034] Legend: 1. Frame; 2. Tablet pressing mold; 2.1. External mold; 2.2. Mold core; 2.3. Mold core stopper; 2.4. Stopper; 3. Mold shifting device; 3.1. Driving mechanism; 3.1.1. Linear driving mechanism; 3.1.2. Circular driving mechanism; 3.2. Mold bracket; 4. Sampling device; 4.1. Feeding cylinder; 4.2. Removing cylinder; 4.2.1. Removing section; 4.2.11. Removing port; 4.2.2. Discharging section; 4.2.21. Discharging port; 4.3. Removing piston; 4.4. Removing drive member; 4.5. First valve; 4.6. Sample storage cylinder; 4. .7. Second valve; 4.8. Pressure relief valve; 4.9. Pressure sensor; 5. Pressing device; 5.1. Bottom plate; 5.2. Top plate; 5.3. Connecting piece; 5.4. Clamping drive piece; 5.5. Upper pressure head; 5.6. Pressure rod; 5.7. Mould closing spring; 5.8. Force sensor; 7. Electronic control device; 8. Unloading conveying pipe; 9. Demoulding device; 9.1. Mould limiting mechanism; 9.2. Demoulding ejector rod; 9.3. Demoulding power piece; 10. Pressing device; 11. Scraping piece; 12. Core resetting device; 12.1. Core resetting drive piece; 12.2. Core pressure rod; 12.3. Elastic piece. DETAILED DESCRIPTION

[0035] 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.

[0036] refer to Figure 1-13 As shown, the present invention discloses a tablet forming device and a method for using the same. The tablet forming device comprises a frame 1, a tablet pressing mold 2, a mold shifting device 3, a sampling device 4, a tablet pressing device 5 and an electric control device 7; In the above embodiment, the mold shifting device 3 and the tablet pressing device 5 are arranged on the frame 1, and the sampling device 4 is connected to the powder tank truck unloading conveying pipe 8; the electronic control device 7 is electrically connected to the above-mentioned mold shifting device 3, the sampling device 4, and the tablet pressing device 5; it is used to control the operation process of the entire system, including sampling, tablet pressing, demolding, and various steps.

[0037] The tableting mold 2 includes an outer mold 2.1 and a core 2.2. The core 2.2 is a cylindrical structure arranged inside the outer mold 2.1. The outer mold 2.1 is a sleeve-shaped structure with a through hole design that runs from top to bottom. The through hole is tightly matched with the core 2.2 to ensure that the core can remain stable during the tableting process; a core stopper 2.3 is provided at the lower part of the through hole. The function of the stopper 2.3 is to limit the core 2.2 to the lower position to prevent the core 2.2 from falling out of the lower part of the outer mold 2.1 due to gravity or other external forces. The stopper 2.3 not only ensures the safety and stability of the core during operation, but also effectively prevents the core from accidentally falling off, thereby increasing the operational reliability of the equipment; a stopper 2.4 is provided on the outer side of the upper end of the outer mold 2.1. The stop table 2.4 is used to precisely cooperate with the mold bracket 3.2 of the mold shifting device 3. Through this cooperation, the mold bracket 3.2 can provide stable support and precise positioning for the tablet pressing mold, thereby ensuring that the tablet pressing mold can maintain a stable posture during various operations (such as tablet pressing, shifting and demolding) and will not be displaced due to external forces, thereby improving the accuracy and consistency of the tablet pressing operation.

[0038] The mold shifting device 3 includes a driving mechanism 3.1 and a mold bracket 3.2. The driving mechanism 3.1 is fixed to the frame 1 and connected to the moving parts of the mold bracket 3.2. The tableting mold 2 is installed on the mold bracket 3.2. Through the mold shifting device 3, the tableting mold 2 can be smoothly moved between different operating positions to meet various operating requirements such as loading, tableting and testing.

[0039] The driving mechanism 3.1 is preferably a linear driving mechanism 3.1.1. The linear driving mechanism 3.1.1 includes a linear motion component, a guide assembly and a power assembly. The guide assembly is mounted on the frame 1, and the linear motion component is supported and mounted thereon by the guide assembly to ensure the stability and accuracy of its motion path. The power assembly is connected to the linear motion component, and by driving it to perform reciprocating linear motion along the track of the guide assembly, the linear displacement of the mold bracket 3.2 is achieved, thereby driving the tableting mold 2 to move precisely between different positions. The type of power assembly can be diverse, including motors, cylinders, hydraulic cylinders or electric cylinders, etc., and a suitable power source is selected according to specific application requirements to ensure the efficiency and reliability of the displacement process.

[0040] In addition, the drive mechanism 3.1 can also be in the form of a circular drive mechanism. The drive mechanism 3.1 realizes the position change of the tableting mold 2 through a circular motion component. The circular drive mechanism can move the mold bracket 3.2 along a circular path, thereby flexibly adjusting the working position of the tableting mold 2 to meet the requirements of different process steps. Whether it is a linear drive mechanism or a circular drive mechanism, the mold shifting device 3 can ensure the precise positioning and stable movement of the tableting mold 2 in various operation links such as loading, tableting, and testing, thereby improving the work efficiency and operation accuracy of the entire system.

[0041] The sampling device 4 includes a feeding barrel 4.1, a taking barrel 4.2, a taking piston 4.3 and a taking drive 4.4. Specifically, the two ends of the feeding barrel 4.1 are respectively connected to the unloading conveying pipe 8 of the powder tank truck to ensure that the powder can be smoothly transported from the tank truck to the sampling device. The taking barrel 4.2 includes a segmented structure of a taking section 4.2.1 and a discharging section 4.2.2. The taking section 4.2.1 is located in the feeding barrel 4.1, and a taking port 4.2.11 is provided at the head of the taking section 4.2.1. The taking port 4.2.11 faces the direction of the incoming material, so that the powder can smoothly enter the taking port during the transportation process, ensuring the efficiency and quality of sample collection.

[0042] The discharge section 4.2.2 is provided with a discharge port 4.2.21, and a first valve 4.5 is provided below the discharge port 4.2.21. The first valve 4.5 is used to control the powder to flow out of the discharge port 4.2.21, and a sample storage cylinder 4.6 is connected below the first valve 4.5 to temporarily store the collected powder samples. A second valve 4.7 is also provided below the sample storage cylinder 4.6 to release or continue to process the stored samples at an appropriate time.

[0043] Since the feeding cylinder 4.1 generates a relatively high air pressure when feeding, during the sampling process, after the first valve 4.5 is opened and closed, the air pressure in the sample storage cylinder 4.6 will be balanced with the air pressure in the feeding cylinder 4.1, which is usually higher than the external atmospheric pressure. In order to prevent the sample in the storage cylinder from being damaged due to excessive pressure, a pressure relief valve 4.8 is provided on the sample storage cylinder 4.6. The function of the pressure relief valve 4.8 is to open when the air pressure in the sample storage cylinder 4.6 is too high, release the excessive pressure, and finally balance the air pressure in the storage cylinder with the external atmospheric pressure, thereby ensuring the safety and stability of the sample during the storage process.

[0044] The material taking piston 4.3 is arranged inside the material taking barrel 4.2 and driven by the material taking driving member 4.4. Under the action of the material taking driving member 4.4, the material taking piston 4.3 moves along the axial direction of the material taking barrel 4.2, and the powder material is smoothly transported from the material taking section 4.2.1 to the material discharging section 4.2.2, so that the sampling device can accurately control the collection and transportation process of the powder material sample to ensure the integrity and representativeness of the sample.

[0045] In order to further optimize the sampling process, a pressure sensor 4.9 is also provided on the feeding barrel 4.1. The pressure sensor 4.9 is used to detect the air pressure in the feeding barrel 4.1 in real time to determine the conveying state of the powder, so that the tablet forming device can adjust the conveying operation in time according to the pressure change in the feeding barrel 4.1, ensure the continuity and efficiency of the sampling process, and prevent sampling failure or inaccuracy caused by air pressure fluctuations.

[0046] The tablet pressing device 5 comprises a bottom plate 5.1, a top plate 5.2, a connecting member 5.3 and a pressing driving member 5.4.

[0047] The bottom plate 5.1 is fixed on the frame 1 to provide a stable support base for the entire tablet pressing device. The pressing drive 5.4 is installed on the bottom plate 5.1 and is responsible for providing the required vertical pressure for the tablet pressing process. The bottom plate 5.1 and the top plate 5.2 are arranged parallel to each other to form a parallel and stable structure to ensure uniform force transmission during the tablet pressing process. The bottom plate 5.1 and the top plate 5.2 are connected by a plurality of connectors 5.3, which not only play a fixing role, but also provide additional support for the stability of the top plate 5.2 to prevent structural deformation or displacement caused by uneven pressure during the powder material forming process.

[0048] An upper pressing head 5.5 is provided below the top plate 5.2, and the bottom surface of the upper pressing head 5.5 is arranged parallel to the bottom plate 5.1 to ensure that the pressure applied during tableting is evenly distributed on the tableting mold 2, thereby ensuring the consistency and reliability of the molding quality of the powdered material.

[0049] A pressing rod 5.6 is provided on the pressing driving member 5.4. The pressing rod 5.6 is arranged at the output end of the pressing driving member 5.4 so as to press the powder sample in the tablet pressing mold 2 under the drive of the pressing driving member 5.4.

[0050] The pressure rod 5.6 is also provided with a mold closing spring 5.7, which provides auxiliary pressure during the tableting process to ensure that when the pressing drive is running, pressure can be applied to the outer mold 2.1 smoothly and evenly, avoiding the tableting effect being affected by instantaneous pressure fluctuations.

[0051] In the above embodiment, the pressing drive member 5.4 can select different power sources according to specific application requirements, including electric cylinders, hydraulic cylinders, air cylinders, crank slider mechanisms or cam mechanisms, etc. The diversified power selection makes the tablet pressing device more adaptable, can meet the requirements of different tablet pressing strengths and speeds, and ensure that the best tablet pressing effect can be achieved under various process conditions.

[0052] In order to further improve the accuracy and controllability of the tableting process, a force sensor 5.8 is provided between the upper pressure head 5.5 and the top plate 5.2. The force sensor 5.8 can monitor the pressure applied to the tableting die in real time, ensuring that each step of the powder material forming process is within the optimal pressure range, thereby improving the accuracy and consistency of the powder material forming and effectively avoiding tableting defects caused by excessive or insufficient pressure.

[0053] The tableting device also includes a demoulding device 9, which is used to safely and smoothly remove the tablet 10 from the tableting mold 2. The demoulding device 9 can ensure the mold stability and sample integrity after the tableting process, and ensure the smooth and efficient demoulding operation. The demoulding device 9 includes a mold limiting mechanism 9.1, a demoulding ejector rod 9.2 and a demoulding power member 9.3.

[0054] The mold limiting mechanism 9.1 plays the role of fixing and limiting the outer mold 2.1 of the tableting mold. During the demoulding process, the outer mold 2.1 is subjected to a certain external force. The role of the mold limiting mechanism 9.1 is to ensure that the outer mold 2.1 will not be displaced or loosened during the entire demoulding process, thereby maintaining the overall stability of the system and the consistency of operation, and further effectively preventing the outer mold 2.1 from any deviation or sliding during the demoulding process, ensuring the smooth progress of the demoulding operation.

[0055] The demoulding ejector pin 9.2 is a key executive component in the demoulding process, and directly acts on the tablet 10. One end of the demoulding ejector pin 9.2 is connected to the demoulding power member 9.3. Through the power provided by the demoulding power member 9.3, the demoulding ejector pin 9.2 can generate sufficient thrust to eject the tablet 10 from the tablet mold 2. The demoulding ejector pin 9.2 can ensure that the force transmission is uniform and stable during the process of pushing the tablet 10, thereby avoiding any damage to the surface or internal structure of the tablet 10.

[0056] The demoulding power member 9.3 provides a driving force source for the demoulding ejector 9.2, which can be hydraulic, pneumatic or electric. The appropriate power component is selected according to the specific application requirements. The demoulding power member 9.3 can accurately control the magnitude and speed of the thrust according to the properties of the tablet 10 and the characteristics of the mold. The demoulding power member 9.3 ensures the accuracy of the demoulding process and reduces the damage to the tablet caused by excessive or uneven force, thereby improving the integrity of sample processing.

[0057] The demoulding device 9 can ensure smooth and accurate demoulding during operation. Whether it is the stable support provided by the mold limit mechanism 9.1, the precise thrust transmission of the demoulding ejector 9.2, or the reliable drive of the demoulding power member 9.3, the coordinated work of these components can significantly reduce the potential damage to the tablet during the demoulding process, ensuring that the tablet 10 maintains the consistency of its shape and physical properties when it is ejected from the mold 2.

[0058] In addition, the tableting molding device also includes a scraper 11, which is used to remove excess powder from the tableting mold 2 after the powder filling is completed. The scraper 11 can be fixedly or movably arranged on the frame 1. When the scraper 11 is fixedly arranged, the mold shifting device 3 moves the tableting mold 2 through the scraper 11, so that the scraper 11 and the tableting mold 2 move relative to each other, thereby scraping off excess powder on the mold surface, ensuring the cleanliness of the mold surface, and preventing excess powder from affecting the subsequent tableting process. When the scraper 11 is movably arranged, the scraper 11 itself moves on the tableting mold 2 through an independent motion mechanism to scrape off excess powder. Through this design, the scraper 11 can adapt to different operating requirements and ensure the cleanliness of the mold surface, thereby improving the accuracy and consistency of the tableting process.

[0059] In order to ensure that the mold core 2.2 can be accurately reset after each operation, the tableting molding device also includes a mold core reset device 12. The mold core reset device 12 includes a mold core reset driver 12.1 and a mold core pressure rod 12.2. The mold core reset driver 12.1 transmits power through the mold core pressure rod 12.2 to push the mold core 2.2 from the working position back to the initial position, ensuring that the mold core can return to the correct position after each tableting operation and prepare for the next operation. In order to prevent the impact force during the reset process from damaging the mold core, an elastic member 12.3 is provided at the head of the mold core pressure rod 12.2. The elastic member 12.3 absorbs part of the impact force during the reset process, reduces the direct impact on the mold core, prolongs the service life of the mold core, and improves the operational safety and stability of the entire system.

[0060] During use, the tablet forming device includes the following steps: The first step: issuing a sampling instruction. The electronic control device 7 first issues a sampling instruction to start the sampling program of the system.

[0061] Step 2: Pressure detection and judgment: the pressure sensor 4.9 detects the pressure in the feeding barrel 4.1 in real time and transmits the detected pressure signal to the electronic control device 7. The electronic control device 7 determines whether the feeding barrel 4.1 is in the powder conveying state according to the pressure signal. If the system detects that the feeding barrel 4.1 is not in the powder conveying state, the subsequent operation will not be triggered to avoid unnecessary actions.

[0062] Step 3: Sampling operation. After confirming that the feeding tube 4.1 is in the powder conveying state, the electronic control device 7 issues a sampling command. At this time, the sampling device 4 starts to work, the first valve 4.5 opens, and the material taking drive 4.4 drives the material taking piston 4.3 to move to the material taking section 4.2.1. The powder enters the material taking piston 4.3 through the feeding port at the head of the material taking section 4.2.1. Subsequently, the material taking drive 4.4 drives the material taking piston 4.3 to convey the powder to the discharge section 4.2.2. The powder enters the sample storage tube 4.6 from the discharge port 4.2.21 through the opened first valve 4.5. After completion, the first valve 4.5 is closed and the pressure relief valve 4.8 is opened to balance the pressure in the sample storage tube 4.6 with the external pressure. At this time, the sampling process is completed.

[0063] Step 4: Loading process, the electronic control device 7 issues a loading command, and the mold shifting device 3 moves the tablet pressing mold 2 to the loading position. At this time, the second valve 4.7 is opened, and the powder in the sample storage cylinder 4.6 is smoothly loaded into the tablet pressing mold 2, and then the second valve 4.7 is closed to complete the loading operation.

[0064] Step 5: scraping off the excess material. After the loading is completed, the electronic control device 7 issues a scraping command. The scraping member 11 moves relative to the tablet pressing mold 2 to scrape off the excess powder on the surface of the tablet pressing mold 2 to ensure that the mold surface is clean and avoid excess powder affecting the quality of subsequent tablet pressing operations.

[0065] Step 6: Tablet pressing operation. After the scraping is completed, the electronic control device 7 issues a tablet pressing command, and the mold shifting device 3 moves the tablet pressing mold 2 to the tablet pressing position. The tablet pressing device 5 is started, and the clamping drive 5.4 drives the pressure rod 5.6 and the mold closing spring 5.7 to operate. The mold closing spring 5.7 makes the outer mold 2.1 fit tightly with the bottom surface of the upper pressure head 5.5, and the pressure rod 5.6 applies pressure to press the powder inside the mold core 2.2. The force sensor 5.8 monitors the pressure in the tablet pressing process in real time. When the pressure reaches the set value, the clamping drive 5.4 drives the pressure rod 5.6 and the mold closing spring 5.7 to retract, completing the tablet pressing operation.

[0066] Step 7: Sample demoulding, the electronic control device 7 issues a demoulding command, and the mold shifting device 3 moves the tableting mold 2 to the demoulding position. The mold limiting mechanism 9.1 firmly limits the tableting mold 2, and the demoulding power part 9.3 drives the demoulding ejector 9.2 to eject the sample tablet 10 from the tableting mold 2, ensuring that the sample is smoothly separated from the mold.

[0067] Step 8: Mold core reset, the electronic control device 7 issues a mold core reset command, and the mold shifting device 3 moves the tablet pressing mold 2 to the mold core reset position. The mold core reset driving member 12.1 drives the mold core pressing rod 12.2 to push the mold core 2.2 back to the initial position to prepare for the next tablet pressing operation.

[0068] The above steps complete a working cycle of the system. The above steps can be performed in sequence or in parallel when there is no conflict to improve efficiency.

[0069] Embodiment 2: The driving mechanism 3.1 is a circular driving mechanism 3.1.2, which includes a circular motion module. The mold bracket 3.2 is connected to the circular motion component in the circular motion module, and the circular motion module drives the mold bracket 3.2 to rotate.

[0070] The scraper 11 is movably arranged on the frame 1 , and the scraper 11 moves to scrape off the excess powder on the tablet pressing mold 2 .

[0071] The rest is the same as in Example 1.

[0072] 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. A tablet forming device, characterized in that: include: Rack (1); A tablet pressing mold (2), the tablet pressing mold (2) comprising an outer mold (2.1) and a mold core (2.2), wherein the mold core (2.2) is arranged inside the outer mold (2.1); A mold shifting device (3), the mold shifting device (3) is installed on the frame (1) and is used to move the tablet pressing mold (2) between the loading and tablet pressing positions; A sampling device (4), wherein the sampling device (4) collects powder samples through a discharge conveying pipe (8) and conveys the samples to a tablet pressing mold (2); A tablet pressing device (5), the tablet pressing device (5) is installed on the frame (1), the tablet pressing device (5) comprises a bottom plate (5.1), a top plate (5.2), a pressing drive member (5.4), an upper pressing head (5.5), a pressing rod (5.6) and a mold clamping spring (5.7), the bottom plate (5.1) is fixedly installed on the frame (1); the top plate (5.2) is arranged opposite to the bottom plate (5.1), and the top plate (5.2) is connected to the bottom plate (5.1) via a connecting member (5.3); The pressing drive (5.4) is mounted on the frame (1) for applying vertical pressure, and the upper pressing head (5.5) is mounted on the top plate (5.2) and connected to the tablet pressing mold (2); the pressing rod (5.6) is arranged at the output end of the pressing drive (5.4) to press the powder sample in the tablet pressing mold (2) under the drive of the pressing drive (5.4); the mold closing spring (5.7) is arranged on the pressing rod (5.6); An electric control device (7), wherein the electric control device (7) is electrically connected to the mold shifting device (3), the sampling device (4), and the tablet pressing device (5).

2. The tablet forming device according to claim 1, characterized in that: The mold shifting device (3) comprises a driving mechanism (3.1) and a mold bracket (3.2); the driving mechanism (3.1) is fixed on the frame (1); the driving mechanism (3.1) is connected to a moving part of the mold bracket (3.2); and the tablet pressing mold (2) is mounted on the mold bracket (3.2).

3. The tablet forming device according to claim 2, characterized in that: The driving mechanism (3.1) is a linear driving mechanism (3.1.1), and the linear driving mechanism (3.1.1) comprises a linear motion component, a guide assembly and a power assembly. The guide assembly is mounted on the frame (1), and the power assembly drives the linear motion component to reciprocate along the track of the guide assembly to cause the mold bracket (3.2) to move linearly, so that the mold bracket (3.2) drives the tablet pressing mold (2) to move.

4. The tablet forming device according to claim 2, characterized in that: The driving mechanism (3.1) is a circular driving mechanism (3.1.2), and the circular driving mechanism (3.1.2) comprises a circular motion module. The mold bracket (3.2) is connected to the circular motion component of the circular motion module, and the circular motion module drives the mold bracket (3.2) to rotate to adjust the position of the tablet pressing mold (2).

5. The tablet forming device according to claim 1, characterized in that: The sampling device (4) comprises a feeding cylinder (4.1), a material taking cylinder (4.2), a material taking piston (4.3), a material taking driving member (4.4) and a sample storage cylinder (4.6). The two ends of the feeding cylinder (4.1) are respectively connected to the unloading conveying pipe (8) of the powder tank truck. The material taking cylinder (4.2) comprises a material taking section (4.2.1) and a unloading section (4.2.2). The material taking section (4.2.1) is located inside the feeding cylinder (4.1). The material taking section (4.2.1) is provided with a material taking port (4.2.11); the unloading section (4.2.2) is provided with a unloading port (4.2.21). A first valve (4.5) is provided below the unloading port (4.2.21). The sample storage cylinder (4.6) is connected below the first valve (4.5).

6. The tablet forming device according to claim 5, characterized in that: The sampling device (4) further comprises a pressure relief valve (4.8), wherein the pressure relief valve (4.8) is arranged on the sample storage cylinder (4.6).

7. The tablet forming device according to claim 1, characterized in that: The tablet pressing device (5) further comprises a force sensor (5.8), wherein the force sensor (5.8) is arranged between the upper pressing head (5.5) and the top plate (5.2).

8. The tablet forming device according to claim 1, characterized in that: The tableting molding device also includes a demoulding device (9), wherein the demoulding device (9) includes a mold limiting mechanism (9.1), a demoulding ejector rod (9.2) and a demoulding power member (9.3), wherein the mold limiting mechanism (9.1) fixes the outer mold (2.1) of the tableting mold, and the demoulding power member (9.3) drives the demoulding ejector rod (9.2) to eject the sample tablet (10) from the tableting mold (2).

9. The tablet forming device according to claim 1, characterized in that: The tablet forming device also includes a mold core resetting device (12), and the mold core resetting device (12) includes: Mold core resetting drive member (12.1); A mold core pressure rod (12.2), the output end of the mold core reset driving member (12.1) is connected to the mold core pressure rod (12.2), and the power is transmitted to the mold core (2.2) through the mold core pressure rod (12.2); An elastic member (12.3) is arranged at the front end of the mold core pressure rod (12.2).

10. A method for using a tablet forming device, characterized in that: The following steps are involved: (1) The electronic control device (7) issues a sampling instruction; (2) The pressure sensor (4.9) detects the pressure in the feeding cylinder (4.1) and transmits the pressure signal to the electronic control device (7); (3) The sampling device (4) performs sampling operation, and the powder enters the sample storage cylinder (4.6) through the first valve (4.5); (4) The mold shifting device (3) moves the tablet pressing mold (2) to the loading position, and the powder in the sample storage cylinder (4.6) is loaded into the tablet pressing mold (2); (5) A tabletting device (5) tablets the sample; Involves molding device but not detection device (6) The mold shifting device (3) moves the tablet pressing mold (2) to the demolding position, and the demolding device (9) ejects the sample tablet (10) from the tablet pressing mold (2); (7) The mold core resetting device (12) resets the mold core (2.2) to the initial position.

Images