Tablet arranging box of tablet press and use method of tablet arranging box

Abstract

The invention discloses a tablet arranging box of a tablet press and a using method of the tablet arranging box. The problems that the tablet arranging box is affected by medicine powder and cannot be effectively monitored, and the blocking condition of the tablet arranging box is solved. And the sheet arranging box is of a channel structure with a flat bottom surface. According to the monitoring assembly, a fixing sleeve is fixedly arranged on the outer side of the bottom face, and a cylindrical first through hole in the fixing sleeve is aligned with a second through hole in the bottom face. The protective sleeve is of a tubular structure with one closed end and the outer wall in sliding fit with the first through hole. The outer side plane of the closed end of the protective sleeve sequentially penetrates through the first through hole and the second through hole to be flush with the bottom face. The capacitive sensor is arranged in the cavity of the tubular structure and used for sensing changes of media on the outer side of the closed end of the protective sleeve. The oscillator is fixedly arranged on the outer wall of the sheet arranging box, and the oscillator oscillates the sheet arranging box when started. Under the assistance of the pneumatic oscillator, the difficult problem that a traditional tablet arranging box device is often blocked can be effectively solved, and the application range of tablet materials pressed by the tablet press is widened.

Description

Technical Field

[0001] The present application relates to the field of pharmaceutical machinery technology, and in particular to a tablet press box and a method of using the same. Background Art

[0002] At present, tablets have become one of the dosage forms with many varieties, large output, wide application, convenient use and storage, and stable quality. Tablets account for more than 1 / 3 of the total amount of preparations included in the pharmacopoeias of China and many other countries, which shows its wide application. Tablet press is the most important equipment for pharmaceutical companies to produce tablets. It can press various granular raw materials into shape. It is mainly used for mass production of single-layer or double-layer round, special-shaped tablets, sugar tablets, calcium tablets and other tablets. It is widely used in pharmaceutical, chemical, food, electronics and other industries.

[0003] The tablet pressing process of the tablet press includes feeding, dosing, pre-pressing, main pressing and tablet discharging. The tablets after compression molding are finally ejected from the working surface of the middle punch plate through the tablet discharging guide rail. Following the rotation of the punch plate assembly, under the action of the friction force with the surface of the middle punch plate, the tablet discharging device guides the tablets along the direction of the tablet discharging lever to the tablet discharging box device. In the tablet discharging box device, the tablets flow into the corresponding collection container under the action of their own gravity, completing all the tablet production processes.

[0004] The tablet press's film discharge box device often experiences tablet blockage during use, that is, when the tablets are guided and discharged in the above-mentioned functional channels of the film discharge box, the contact friction between the tablets and the film discharge box device increases due to various reasons, so that the tablets cannot be discharged into the corresponding collection container normally under the action of their own gravity, causing the tablets to be blocked in the corresponding channel. As the congestion time increases, the tablets will become more and more congested to the position of the tablet press's film discharge lever device. The cover plate in the film discharge lever device is deformed under the action of the congestion squeezing force, and it is very easy to collide with the upper punch, causing damage to the film discharge lever device and other parts, resulting in serious production accidents.

[0005] The tablet press's tablet box device is installed at an angle to facilitate the tablets in each channel of the device to flow into the corresponding collection container under the action of their own gravity. The installation inclination angle is different depending on the structure and size of the tablet press's tablet box device.

[0006] By installing monitoring equipment, the status of the film arrangement box can be effectively monitored, but tablet powder will be scattered during the film arrangement process, which can easily affect the monitoring equipment and reduce the accuracy of the monitoring equipment.

[0007] There are many reasons for tablet blockage: for example, the design and processing of the tablet box device itself or the characteristics of the tablet itself, etc. It may also be caused by the superposition of the above multiple reasons, all of which bring safety hazards to tablet production by tablet presses. In order to avoid tablet production safety accidents caused by tablet blockage and cause unnecessary economic losses, it is necessary to design a tablet press tablet box and its use method. Summary of the invention

[0008] The embodiment of the present application provides a tablet press box and a method for using the same, which solves the problem that the tablet press box cannot be effectively monitored and congested due to the influence of medicine powder.

[0009] In a first aspect, an embodiment of the present application provides a film box for a tablet press, comprising a film box, a monitoring component and an oscillator. The film box is a channel structure with a flat bottom surface and an inclined arrangement. The monitoring component comprises a capacitive sensor, a protective cover and a fixed cover. The fixed cover is provided with a first cylindrical through hole, and the fixed cover is fixedly arranged on the outer side of the bottom surface, and the first through hole is aligned with the second through hole on the bottom surface. The protective cover is a tubular structure with one end closed and an outer wall slidingly matched with the first through hole. The outer plane of the closed end of the protective cover passes through the first through hole and the second through hole in sequence and is flush with the bottom surface. The capacitive sensor is arranged in the cavity of the tubular structure, and is used to sense changes in the medium outside the closed end of the protective cover. The oscillator is fixedly arranged on the outer wall of the film box, and oscillates the film box when the oscillator is started.

[0010] In one embodiment, the first through hole and the second through hole have the same diameter. The end of the fixing sleeve is sealed and connected to the bottom surface.

[0011] In one embodiment, the outer wall of the protective sleeve is provided with a first annular groove and a second annular groove perpendicular to the axial direction of the first through hole. The first annular groove is used to set an O-ring. The second annular groove is used to cooperate with a screw passing through the threaded through hole on the fixing sleeve to fix the protective sleeve.

[0012] In one embodiment, it further comprises an air pipe, a solenoid valve and a filter pressure reducing valve. The oscillator is a pneumatic oscillator. One end of the filter pressure reducing valve is connected to an external air source, and the other end is connected to the solenoid valve and the pneumatic oscillator in sequence through the air pipe, so as to adjust the oscillation air pressure of the pneumatic oscillator. The solenoid valve is used to control the on and off of the oscillation air pressure.

[0013] In one of the embodiments, a control system is also included, which is used to receive the alarm information sent by the capacitive sensor.

[0014] In one embodiment, the film discharge box comprises a film discharge channel body, a glass cover plate, a baffle weldment, a paddle weldment and a corner electromagnet. The film discharge channel body is a guide rail structure surrounded by the bottom surface and two side panels. The glass cover plate is sealed above the guide rail of the film discharge channel body. The baffle weldment is a baffle fixedly arranged on the bottom surface, which is used to separate the film discharge channel body into multiple channels; the baffle is provided with a notch that passes through different channels. The corner electromagnet is arranged on the baffle below the notch, which is used to drive the paddle weldment to swing on the bottom plane, switching to block the notch or block the channel on one side of the baffle.

[0015] Preferably, the second through hole is close to the upper end of the channel structure.

[0016] Preferably, the oscillator is arranged on the side wall of the film stripping box. The oscillator is arranged at a lower height on the slope of the channel structure than the monitoring component.

[0017] In a second aspect, the present application also provides a method for using a tablet press cassette, using the tablet press cassette of any one of the first aspect embodiments, comprising the steps of: The tablet press cassette is discharging tablets normally, and the oscillator is turned off; In response to the monitoring component detecting that the medium outside the closed end of the protective sleeve changes according to a set condition, the oscillator is started; After the oscillator is started, the monitoring component sends an alarm message that exceeds the set threshold and shuts down the tablet press.

[0018] In a third aspect, the present application also provides a method for using a tablet press box, using the tablet press box of any one embodiment of the first aspect, comprising the steps of: Set the oscillation period for the oscillator, and the oscillator starts and stops according to the set period, working repeatedly; In response to the monitoring component detecting that the medium outside the closed end of the protective sleeve changes according to a set condition when the oscillator stops working, the oscillator starts.

[0019] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: With the assistance of the pneumatic oscillator, the present application can effectively solve the thorny problem of frequent blockage of the traditional tablet box device, and expand the scope of application of tablet presses for tablet materials. The monitoring and control system can carry out early warning and shutdown when the blockage phenomenon occurs, ensuring the safe production and operation of the tablet press, and preventing subsequent production accidents caused by the aggravation of the blockage phenomenon, which brings unnecessary economic losses. The air path control system and the monitoring and control system in the device are controlled by the tablet press PLC control system, and the control operation is simple and the degree of automation is high. The application range is wide, and by adjusting the air pressure of the filter pressure reducing valve, it can adapt to the compression of tablets with different characteristics; by selecting the appropriate pneumatic oscillator and capacitive sensor model, it can be applied to tablet presses of different models of tablet box devices, and the installation and replacement operation are simple; it has a variety of working modes, and the switching between the modes is simple, so that the tablet press can always be in the best tablet working state when compressing any tablet variety. The improvement and optimization on the original tablet box device is simple in structure, easy to disassemble and maintain, and uses ordinary standard components, with low installation cost, realizing the real low cost and great effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the tablet pressing process of the tablet pressing machine in the prior art; Figure 2 It is a schematic diagram of the force on tablets in the tablet box device of the prior art; Figure 3 A structural diagram of a tablet press box provided in an embodiment of the present application; Figure 4 A structural diagram of a fixing sleeve provided in an embodiment of the present application; Figure 5 A structural diagram of a protective cover provided in an embodiment of the present application; Figure 6 A structural diagram of a capacitive sensor provided in an embodiment of the present application; Figure 7 A structural diagram of a gas oscillator provided in an embodiment of the present application; Figure 8 A structural diagram of the gas circuit control system provided in the embodiment of the present application; Fig. 9 A diagram showing the internal structure of the film arrangement box provided in an embodiment of the present application; Fig.10 A schematic diagram of the internal channel switching of the film cassette provided in an embodiment of the present application; Fig.11 A flow chart of a method for using a tablet press cassette with a passively opened and closed oscillator provided in an embodiment of the present application; Fig.12 A flow chart of a method for using a tablet press cassette with an oscillator that actively opens and closes provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0022] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, in the prior art, the tableting process of the tablet press includes feeding, dosing, pre-pressing, main pressing and tableting, and the tablets are finished after the tableting process is completed. The upper and lower punches are driven by the punch plate and move along the upper and lower guide rail assemblies respectively. When the punches move to the feeding and filling section, the upper punch moves upward to bypass the feeder, and at the same time, the lower punch moves downward, and the upper surface of the lower punch forms a cavity with the middle die hole. The powder particles are filled into the middle die cavity through the feeder to complete the material filling process. After that, the upper punch moves downward and the lower punch moves upward to complete the quantitative process of the material in the quantitative section, and then passes through the pre-pressing wheel to complete the pre-pressing process of the material, and then enters the main pressing section to complete the final pressing process of the material. The pressed tablets are finally ejected from the working surface of the middle punch plate through the tablet discharge guide rail, and follow the rotation of the punch plate assembly. Under the action of the friction force with the surface of the middle punch plate, the tablet discharge device guides the tablet along the direction of the tablet discharge gear rod to the tablet discharge box device. In the tablet discharge box device, the tablets flow into the corresponding collection container under the action of their own gravity, completing all the processes of tablet production.

[0024] There are many reasons why the tablet press box produces tablet blockage, the main reasons are as follows: The design and processing reasons of the film cassette device Due to the structural dimensions of the tablet press and other reasons, when the tablet box is installed at an angle, the installation angle α of the device is too large. Figure 2 As shown in the figure, the tablet's own weight G can be decomposed into a downward component along the bottom slope of the film discharge box device - the sliding force Gx and a downward component perpendicular to the slope - the positive pressure Gy. The larger the inclination angle α, the smaller the decomposed sliding force Gx (Gx=G*cosα) and the greater the positive pressure Gy, that is, the greater the friction F between the tablet and the bottom of the film discharge box. When the sliding force Gx is less than or equal to the friction F, the tablet will stop sliding, eventually leading to tablet blocking.

[0025] In addition, the roughness of the inner surface of the channel of the film box device after processing is poor or deformed during processing, which causes the friction coefficient with the surface to increase. When the friction force F is greater than or equal to the tablet sliding force Gx, the tablet cannot slide down normally, resulting in tablet blockage.

[0026] Tablets’ own characteristics When producing and pressing some special material particles, such as material particles with high viscosity, strong adsorption, low bulk density, high fine powder content and poor formability, the friction coefficient of the surface of the pressed tablets will be relatively large, and it is very easy to cause tablet blockage when the tablets slide down inside the tablet box device.

[0027] Other causes (1) In the early debugging stage of tablet production, if the tablet is not hard enough or has not been formed, it is very easy for the material powder on the tablet surface to fall into the channel of the tablet box device. When the tablet slides down through the channel covered with material powder on the surface, the friction coefficient of the material powder itself is very large, resulting in the tablet not being able to slide down normally, thus causing the tablet to be blocked.

[0028] (2) In the normal stage of tablet production, when the tablets are compressed and exhausted in the pre-pressing process, the material powder will be discharged along with the airflow and fall onto the surface of the middle die plate. When the tablets are discharged in the tablet discharge process, the dust on the surface of the middle die plate will be discharged into the subsequent tablet discharge box device. As the amount of dust flowing into the tablet discharge box device continues to increase, it will eventually cause the tablets to not slide down normally, resulting in tablet blockage.

[0029] (3) During the normal stage of tablet production, the tablet discharging process is not smooth, resulting in tablet fragments. The broken tablets enter the tablet box channel. Due to the increased friction coefficient on the surface of the broken tablets, the tablets cannot slide smoothly, resulting in tablet blockage.

[0030] Figure 3 A structural diagram of a tablet press box provided in an embodiment of the present application includes a tablet box 1, a monitoring component 2 and an oscillator 3.

[0031] The film arrangement box has a flat bottom and an inclined channel structure.

[0032] The tablet press's tablet box is installed at an angle to facilitate the tablets in each channel of the device to flow into the corresponding collection container under the action of their own gravity. The installation angle of the tablet press's tablet box is different depending on its structure and size.

[0033] The flat and inclined bottom of the tablet box is suitable for tablets to slide from the upper end to the lower end by gravity.

[0034] The monitoring component includes a capacitive sensor 23 , a protective cover 22 and a fixing cover 21 .

[0035] The fixing sleeve is provided with a first cylindrical through hole, and the fixing sleeve is fixedly arranged on the outer side of the bottom surface, and the first through hole is aligned with the second through hole on the bottom surface.

[0036] For example, holes are opened on the bottom surface and one side of the channel body of the film stripping box for welding the fixing sleeve and installing the pneumatic oscillator.

[0037] In one embodiment, the first through hole and the second through hole have the same diameter. The end of the fixing sleeve is sealed and connected to the bottom surface.

[0038] For example, the fixing sleeve is welded and sealed on the bottom surface of the film stripping box, and the first through hole on the fixing sleeve and the second through hole on the bottom surface are consistent in size and aligned.

[0039] Fixed sleeve, such as Figure 4 As shown, it is made of stainless steel pipe and welded to the bottom surface of the sheet-discharging channel. One end is processed with a chamfer C to facilitate the installation of the monitoring device in the monitoring assembly (i.e. the capacitive sensor enters from the side with the chamfer). The φd1 hole is used for the installation and positioning of the monitoring device, and the threaded hole M is used for the locking and fixing of the monitoring device.

[0040] The protective sleeve is a tubular structure with one end closed and an outer wall slidingly matched with the first through hole.

[0041] The outer plane of the closed end of the protective sleeve passes through the first through hole and the second through hole in sequence and is flush with the bottom surface.

[0042] For example, protective covers, such as Figure 5 As shown in the figure, it is made of non-metallic wear-resistant material, and the inner cavity is processed with internal thread m, which is screwed into the threaded sleeve M of the capacitive sensor and installed as a whole. The outer diameter ΦD of the protective sleeve is matched with the inner diameter Φd1 of the fixed sleeve in the film arrangement system, and the protective sleeve can be quickly inserted into the fixed sleeve together with the capacitive sensor, and then locked by the knurled screw. The non-metallic material can prevent the capacitive sensor from directly contacting the metal fixed sleeve, reducing installation wear and metal interference with the sensor.

[0043] In one embodiment, a first annular groove and a second annular groove perpendicular to the axial direction of the first through hole are provided on the outer wall of the protective sleeve.

[0044] The first annular groove is used to arrange an O-ring.

[0045] The O-ring is installed in the first annular groove on the outside of the protective sleeve and is used to seal between the protective sleeve and the fixed sleeve in the film discharge system to prevent dust inside the film discharge system channel from leaking to the outside.

[0046] The second annular groove is used to cooperate with a screw passing through the threaded through hole on the fixing sleeve to fix the protective sleeve.

[0047] For example, the screw is a knurled screw, which is screwed onto the fixed sleeve of the film arrangement system. When the protective sleeve and the capacitive sensor are inserted into the fixed sleeve, they are pushed into the second annular groove outside the protective sleeve, so that the protective sleeve and the capacitive sensor are axially positioned. The knurled screw can be screwed in, locked, and unscrewed by hand, which facilitates the disassembly and assembly of the protective sleeve without tools, thereby improving work efficiency.

[0048] For example, the first annular groove is used for the installation of the O-ring; the second annular groove is used to limit its axial position under the fixation of the knurled screw, ensuring that the protective cover is flush with the bottom surface of the film arrangement box after installation. If it is higher than the bottom surface of the film arrangement box, it will block the sliding movement of the tablets and affect the film arrangement effect; if it is lower than the bottom surface of the film arrangement box, the protective cover and the bottom surface of the film arrangement box will form a hole, and the material dust will gradually accumulate and fill the hole, affecting the sensing detection accuracy of the sensor.

[0049] The capacitive sensor is arranged in the cavity of the tubular structure and is used for sensing the change of the medium outside the closed end of the protective sleeve.

[0050] For example, capacitive sensors are connected to the tablet press PLC control system. They use various types of capacitors as sensing elements. When the sensing surface detects changes in the measured medium, it will cause changes in the capacitance of the capacitor. The change signal is transferred to the tablet press PLC monitoring and measurement system, and then the change in capacitance is converted into an electrical signal output. There are many models according to the size of the outer dimensions, suitable for film box devices of different sizes and structures.

[0051] For example, Figure 6 As shown, the capacitive sensor is screwed into the protective sleeve through the external threaded sleeve M and matched with the thread of the protective sleeve. The normally open state setting button in the programming button is used to set the state when the tablets inside the tablet box are normally discharged. The normally closed state setting button in the programming button is used to set the state when the tablets inside the tablet box device are blocked and work abnormally. The working status LED ring at the tail of the sensor can be used to display the working status of the tablet box. When the tablet box device has a blockage problem, the LED ring lights up and transmits the signal to the tablet press PLC monitoring system in time, prompting the equipment to stop processing immediately to avoid subsequent production accidents.

[0052] The oscillator is fixedly arranged on the outer wall of the film row box, and the film row box is oscillated when the oscillator is started.

[0053] The oscillator may be of any structure, for example, an electric oscillator or a pneumatic oscillator. Since the starting oscillator is most suitable for the size of the film cassette and is easy to install, the oscillator preferably includes a pneumatic oscillator 31 .

[0054] Pneumatic oscillators, such as Figure 7 As shown, it is a device that uses compressed air as a power source and produces vibration effects through the movement of the internal structure.

[0055] Its working principle is mainly based on the principles of aerodynamics and mechanics. When compressed air enters the pneumatic oscillator from the air inlet, the gas pressure acts on the internal steel ball and the shell, causing the steel ball to rotate at high speed in the shell and generate centrifugal force. This centrifugal force drives the steel ball to move in a circle along the inner wall of the shell, generating periodic impact force. These impact forces are transmitted through the steel ball, causing vibration and disturbance to the film box device, causing relative movement between the tablet and the contact surface of the film channel body, thereby pushing the tablet to move along the tilt direction of the film box device.

[0056] Pneumatic oscillators are classified into many categories according to the maximum oscillation force. You can choose the appropriate model according to the size of the tablet box device or the characteristics of the tablets produced. Pneumatic oscillators are easy to install, and you can also equip multiple models of pneumatic oscillators at the same time and replace and install them according to actual production needs.

[0057] It should be noted that the pneumatic oscillator requires an oscillating airflow to operate, so an air control system is also required, such as Figure 8 As shown, it includes an air pipe 32, a solenoid valve 33 and a filter pressure reducing valve 34.

[0058] One end of the filter pressure reducing valve is connected to an external air source, and the other end is connected to a solenoid valve and a pneumatic oscillator in sequence through an air pipe, so as to adjust the oscillation air pressure of the pneumatic oscillator.

[0059] For example, the filter pressure reducing valve filters the air pressure of the pneumatic oscillator to prevent moisture or residue from entering the pneumatic oscillator and causing damage to the pneumatic oscillator. The oscillation air pressure required to press tablets of different characteristics is different. The oscillation air pressure can be changed by adjusting the pressure regulating knob on the filter pressure reducing valve to ensure that the tablets in each channel of the tablet box device can be normally introduced into each collection container without blocking. The barometer is used to display the oscillation air pressure and can be used to record the air pressure required for the production of tablets with different characteristics, which is convenient for recording and statistics of production data.

[0060] Solenoid valve, used to control the on and off of oscillating air pressure.

[0061] For example, the solenoid valve controls the on and off of the oscillation air pressure, and is connected to the tablet press PLC control system for control. In the "manual mode", the solenoid valve can be switched between the start and stop states by clicking a dedicated button on the tablet press touch screen. Of course, you can also set the two sets of parameters, "oscillation interval" and "oscillation time", in advance as needed to achieve "automatic mode" operation. The "oscillation interval" is the time from the end of the oscillation of the pneumatic oscillator to the start of the next oscillation, in seconds; the "oscillation time" is the time from the start of the oscillation of the pneumatic oscillator to the end of the oscillation, in seconds. Regardless of the mode of operation, the solenoid valve must be opened before the tablet press is operated, and the solenoid valve must be closed after the machine is shut down.

[0062] The air pipe has various diameters and is used to transport the oscillating airflow to the closed pipeline of the pneumatic oscillation device, completing the connection between the external airflow and the device and the various airflow pipelines inside the device.

[0063] Furthermore, it also includes a pneumatic connector 35, and the corresponding model is selected according to the size of the gas line and gas pipe, including a pneumatic three-way connector 35-1, a pneumatic single-way connector 35-2, and a pneumatic right-angle connector 35-3.

[0064] The pneumatic three-way joints, pneumatic straight-through joints and pneumatic right-angle joints in the system are all used for quick plug-in of the air pipe in the air circuit, so that the entire air circuit is connected and connected, and are all referred to as pneumatic joints here. Among them, the pneumatic three-way joint is a component that divides one oscillating air pipeline into multiple air pipelines, and can be used on a tablet press equipped with multiple sets of the new type of film box device, greatly expanding the application range of the device.

[0065] Further preferably, the functional elements in the pneumatic control system are locked and fixed to each other by fasteners.

[0066] In one of the embodiments, a control system is also included for receiving the alarm information sent by the capacitive sensor.

[0067] The control system may be a tablet press PLC system or other control systems, which are not further limited here.

[0068] The capacitive sensor detects that the movement state of the tablet in the tablet box has changed to a preset standard. For example, the tablet's sliding speed in the tablet box is lower than the set threshold, or the time for the mass change above the sensing head of the capacitive sensor exceeds the set threshold. It is considered that a tablet blockage has occurred in the tablet box, and the capacitive sensor sends an alarm message to the control system.

[0069] In embodiment 1, an alarm message is sent to a control system, and the control system emits an audible and visual prompt to remind the staff to start or adjust the oscillator.

[0070] For example, the alarm information is displayed on a display terminal by the control system or the control system controls the alarm device to emit an alarm prompt sound.

[0071] In embodiment 2, the alarm information is sent to the control system, and the control system sends a control signal to control the vibration strength or start and stop of the oscillator.

[0072] Fig. 9 This is a structural diagram of a film ejection box provided in an embodiment of the present application. The film ejection box includes a film ejection channel body 11, a glass cover plate 12, a baffle weldment 13, a paddle weldment 14 and a corner electromagnet 15.

[0073] The sheet discharging channel body is a guide rail structure surrounded by a bottom surface and two side panels.

[0074] For example, the tablet discharge channel body is a U-shaped channel guide structure formed by bending a stainless steel plate, that is, the steel plate is bent into a bottom surface and two side surfaces. This guide structure is used to slide the tablets into the corresponding tablet collection container under the action of their own gravity after pressing. In order to reduce the friction between the tablets and the surface of the channel body to facilitate tablet discharge, the inner surface of the channel body is mirror polished.

[0075] The glass cover plate is sealed and arranged above the guide rail of the sheet discharging channel body.

[0076] For example, the glass cover is made of colorless and transparent polycarbonate (PC) plate, fixed to several groups of support blocks with fasteners, and the upper part of the tablet discharge channel is sealed and shielded to prevent tablets from flying out of the tablet discharge channel during production, or foreign objects from entering and exiting the tablet discharge channel, causing tablet quality problems. The transparent glass cover allows the operator to easily observe the tablet discharge situation inside the tablet discharge channel, and also observe the position of the plate weldment to ensure the correctness of the tablet discharge channel.

[0077] The baffle weldment is a baffle fixedly arranged on the bottom surface and is used to separate the sheet row channel body into a plurality of channels.

[0078] For example, the first baffle weldment 13-1, the second baffle weldment 13-2 and the third baffle weldment 13-3 are made of stainless steel plates or other non-metallic materials that meet the material requirements for pharmaceutical production, and are all installed and fixed to the bottom of the sheet-discharging channel body with fasteners, and their internal channels are blocked, isolated and split according to the actual requirements of the sheet-discharging channel body separation structure.

[0079] The baffle is provided with gaps which penetrate different channels.

[0080] The corner electromagnet is arranged on the baffle plate below the notch, and is used to drive the paddle plate weldment to swing on the bottom plane, switching to block the notch or the channel on one side of the baffle plate.

[0081] The switch plate weldment is divided into waste film baffle weldment and sampling baffle weldment according to different functions. They are all welded and processed by stainless steel plates of different thicknesses and fixed on the rotating shaft of the corner electromagnet by fasteners. Their function is to rotate and change their position under the action of the torque of the corner electromagnet to switch the film discharge channel.

[0082] like Fig. 9 As shown, the pick plate weldment is divided into a discard pick plate weldment 14-1 and a sampling pick plate weldment 14-2 The corner electromagnet is based on the principle of electromagnetic attraction and adopts an inclined surface structure. When it is energized and attracted, it uses the inclined surface to produce an angle rotation and output a torque without axial displacement. It has the advantages of accurate rotation angle, reliable action, and fast attraction. According to the direction of rotation when electromagnetic attraction is applied, it can be divided into two types: left-handed and right-handed. According to the different rotation angles, it can be divided into 30°, 45°, 60° and 90° types, making it suitable for various structures of film box devices. It includes corner electromagnet (right-hand) 15-1 and corner electromagnet (left-hand) 15-2.

[0083] The notch is used as a medicine replacement channel, and cooperates with the corner electromagnet swing plate weldment arranged on the baffle below the notch.

[0084] For example, Fig. 9 The first baffle weldment separates the channel from the middle from the upper end of the channel body, wherein the right channel is used to enter normal tablets, and the left channel is used to receive waste tablets screened out before the tablets enter the film box. There is a gap below the first baffle weldment, and the gap is aligned with the corner electromagnet (right-handed). The corner electromagnet (right-handed) is fixed with a waste removal plate weldment, and the corner electromagnet (right-handed) drives the waste removal plate weldment to connect to the first baffle weldment on the top and the right channel side wall on the right to achieve two states of blocking the gap or blocking the right channel.

[0085] The second baffle weldment is directly connected to the bottom of the corner electromagnet (right-rotating), and the second baffle weldment divides the left channel into the leftmost waste channel and the middle sampling channel. Since the corner electromagnet (right-rotating) is directly connected to the second baffle weldment, the middle sampling channel is sealed, and the tablets entering from the left channel can only enter the waste channel.

[0086] A sampling plate weldment is fixed above the corner electromagnet (left-hand rotation). The corner electromagnet (left-hand rotation) drives the sampling plate weldment to connect to the corner electromagnet (right-hand rotation) on the top and to the side wall of the right channel on the right to achieve two states of blocking the gap or blocking the right channel. When the sampling plate weldment blocks the right channel, the middle sampling channel is exposed, and the sampling plate weldment forms a slope that is inclined inward relative to the tablet discharge channel body, which facilitates the tablets to slide into the sampling channel.

[0087] For example, Fig.10 As shown in the figure, the working process of the tablet box device when the tablet press is working: Tablet production commissioning phase In the early debugging stage, the performance indicators of the tablets (tablet weight, tablet hardness, etc.) are still unqualified. At this time, the tablet box is in the "channel state one" mode, and the unqualified tablets in the debugging stage are discharged into the waste channel and introduced into the waste collection container.

[0088] Normal tablet production stage (1) Normal production: After the tablets are debugged and qualified, they enter the normal production mode. The waste tablet pick weldment rotates to the left to change the channel of the tablet box device to the "channel state 2" mode. Qualified tablets are discharged into the qualified product channel and introduced into the tablet screening machine for subsequent tablet processing to remove the burrs and dust adhering to the surface of the tablets.

[0089] (2) Sampling and testing: During the normal production stage of tablets, tablet sampling and testing are required to be carried out regularly to ensure that the various indicators of the produced tablets are stable and reliable. Click the "Sampling" button on the tablet press control page, and the sampling plate weldment rotates to the right to change the channel of the tablet box device to the "channel state three" mode. Qualified tablets are discharged into the sampling channel and introduced into the sampling collection container. The rotation of the sampling plate weldment can also be automatically adjusted according to the "sampling interval" and "sampling time" set on the tablet press control page to realize the "automatic sampling" function of the tablet press. Among them, the "sampling interval" is the time interval between two samplings, and the unit is seconds; the "sampling time" is set according to the number of tablets that need to be sampled, and the unit is seconds.

[0090] (3) During the normal tablet production stage, if a fault alarm or an emergency abnormal shutdown occurs, the waste removal plate rotates toward the right weldment, changes the tablet box device to the "channel state one" mode, and guides all tablets into the waste collection container to ensure that no waste tablets enter the qualified tablets.

[0091] When the tablet production is completed and the equipment is shut down normally, the waste rejection plate weldment rotates to the right, and the tablet box device is changed to the "channel state one" mode, and all tablets are guided into the waste collection container to ensure that no waste tablets enter the qualified tablets.

[0092] The tablet press machine's film discharge box device often has a tablet jam during use. That is, when the tablets are guided and discharged in the above-mentioned functional channels of the film discharge box, the contact friction between the tablets and the film discharge box device increases due to various reasons, so that the tablets cannot be discharged into the corresponding collection container normally under the action of their own gravity, causing the tablets to be jammed in the corresponding channel. As the jam time increases, the tablets will be increasingly jammed to the position of the tablet press machine's film discharge lever device. The cover plate in the film discharge lever device is deformed under the action of the jam squeezing force, and it is very easy to collide with the upper punch, causing damage to the film discharge lever device and other parts, resulting in serious production accidents. Therefore, it is necessary to install a monitoring component and an oscillator.

[0093] Furthermore, it also includes support blocks 16, the number and installation of which can be determined according to the size or structure of the tablet box of different tablet presses. They are fixed to the bottom of the tablet channel body by fasteners, with a height equivalent to the side wall of the tablet box. They are made of non-metallic materials that meet the material requirements for pharmaceutical production and are used to support and fix the glass cover. The non-metallic material can effectively prevent damage to the glass cover when it is locked and fixed.

[0094] Since the upper end of the channel structure is where the tablet enters, the second through hole is arranged close to the upper end of the channel structure so that the tablet blockage can be discovered as soon as possible. Therefore, preferably, the second through hole is close to the upper end of the channel structure.

[0095] Since the oscillator oscillates preferably around the core where the blockage occurs, and the monitoring component detects the blockage upstream of the core where the blockage occurs, the oscillator is preferably arranged on the side wall of the film stripping box. The oscillator is arranged at a lower height on the slope of the channel structure than the monitoring component.

[0096] Fig.11 A flow chart of a method for using a tablet press cassette with a passively opened and closed oscillator provided in an embodiment of the present application, using a tablet press cassette according to any one of the embodiments of the first aspect, comprising steps 110 to 130.

[0097] Step 110: The tablet press discharges the tablets in the discharge box normally, and the oscillator is turned off.

[0098] The compressed tablets can be normally arranged in the tablet arrangement system channel, and the pneumatic oscillator in the tablet arrangement system is not started.

[0099] Step 120 , in response to the monitoring component detecting that the medium outside the closed end of the protective sleeve changes according to a set condition, the oscillator is started.

[0100] The monitoring control system starts real-time monitoring. When a blockage problem occurs due to special circumstances, the pneumatic oscillator is immediately started to assist in discharging the film.

[0101] Step 130: After the oscillator is started, the monitoring component sends an alarm message exceeding the set threshold and shuts down the tablet press.

[0102] When the blockage time exceeds the set value, the shutdown command is initiated to stop the equipment and find and analyze the cause of the blockage.

[0103] In this mode, if you find that the tablets in the tablet discharge system channel are not discharged smoothly, which is a precursor to tablet blockage, you can enter the tablet press touch screen control interface, click the exclusive button on the touch screen, manually start the pneumatic oscillator in advance, and pre-start the auxiliary tablet discharge function to reduce the occurrence of tablet blockage.

[0104] Fig.12 A flow chart of a method for using a tablet press cassette with an oscillator that is actively opened and closed provided in an embodiment of the present application, using the tablet press cassette described in any one of the embodiments of the first aspect, comprising steps 210 to 220.

[0105] Step 210: Set an oscillation period for the oscillator. The oscillator starts and stops according to the set period and works repeatedly.

[0106] The compressed tablets occasionally have difficulty in discharging in the tablet discharging system channel. The tablet discharging system operates reciprocatingly according to the two sets of parameters set, "oscillation interval" and "oscillation time".

[0107] Step 220: In response to the monitoring component detecting that the medium outside the closed end of the protective sleeve changes according to a set condition when the oscillator stops working, the oscillator starts.

[0108] The monitoring and control system starts real-time monitoring. When a blockage problem occurs within the "oscillation interval" time, the pneumatic oscillator is started immediately in advance.

[0109] When the film blocking state time exceeds the set value, the shutdown command is activated to stop the equipment. When the film blocking phenomenon occurs within the "oscillation time", the shutdown command is activated to stop the equipment. After the shutdown, the control parameters of "oscillation interval", "oscillation time" and "oscillation air pressure" are readjusted until the film arrangement system is in the best working state.

[0110] In this mode, when there are signs of blockage during the "oscillation interval", the pneumatic oscillator can be manually turned on in advance to reduce the occurrence of blockage.

[0111] In one embodiment, the compressed tablets cannot be normally arranged in the tablet arrangement system channel. When the tablet press is in the early stage of inching debugging or normal operation, the pneumatic oscillator in the tablet arrangement system can be automatically started and is in the auxiliary tablet arrangement state until the tablet press stops running. The monitoring control system starts real-time monitoring, and when the tablet arrangement system is blocked, the shutdown command device is started to stop running.

[0112] In one embodiment, before using the tablet press cassette, the monitoring component and the oscillator need to be adjusted.

[0113] For example, the monitoring control system and the solenoid valve in the gas circuit control system of the device are connected to the PLC control system of the tablet press, and the external gas source is connected to the filter pressure reducing valve in the gas circuit control system of the device through the gas pipe.

[0114] Turn on the external air source and the tablet press control system, enter the tablet press touch screen control interface, click the dedicated button on the touch screen, and pre-check whether the solenoid valve and pneumatic oscillator are working normally, as well as the airtightness of the oscillation air circuit.

[0115] Install the monitoring and control system into the film arrangement system, position and lock it, and check whether it is installed in place.

[0116] After all the above checks are correct, start the tablet press and enter the early debugging stage of tablet production. Place the tablets on the sensing surface of the capacitive sensor in the monitoring and control system to simulate the phenomenon of tablet blocking in the tablet arrangement system. Observe whether the working status of the LED ring display light of the capacitive sensor and the alarm status of the PLC control system are normal when the tablet arrangement system is working normally and when the tablet is blocked. Otherwise, the programming button on the capacitive sensor needs to be adjusted to make its working status consistent with that of the tablet arrangement system.

[0117] According to the characteristics and types of compressed tablets, the filter pressure reducing valve in the air path control system can be adjusted to change the size of the oscillation air pressure, and the appropriate oscillation force can be adjusted to ensure that the tablets are normally arranged in each channel of the tablet arrangement system. Too large an oscillation force can easily cause the tablets to collide with each other and break, and increase the operating noise of the device; too small an oscillation force cannot meet the functional requirements of auxiliary tablet arrangement.

[0118] After completing the preliminary debugging stage of tablet production, the normal operation stage of tablet production begins. According to the different characteristics of the compressed tablets, the device can have the following working modes during the normal production stage, and various modes can be switched by selecting the function button on the tablet press touch screen control interface.

[0119] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A tablet box for a tablet press, characterized in that: Contains film arrangement box, monitoring component and oscillator; The film arrangement box has a flat bottom surface and an inclined channel structure; The monitoring assembly comprises a capacitive sensor, a protective cover and a fixing cover; The fixing sleeve is provided with a cylindrical first through hole, the fixing sleeve is fixedly arranged on the outer side of the bottom surface, and the first through hole is aligned with the second through hole on the bottom surface; The protective sleeve is a tubular structure with one end closed and an outer wall slidingly matched with the first through hole; The outer plane of the closed end of the protective sleeve passes through the first through hole and the second through hole in sequence and is flush with the bottom surface; The capacitive sensor is disposed in the cavity of the tubular structure and is used to sense changes in the medium outside the closed end of the protective sleeve; The oscillator is fixedly arranged on the outer wall of the film row box, and the film row box is oscillated when the oscillator is started.

2. The tablet press box according to claim 1, characterized in that: The first through hole and the second through hole have the same diameter; The end of the fixing sleeve is sealed and connected to the bottom surface.

3. The tablet press box according to claim 1, characterized in that: The outer wall of the protective sleeve is provided with a first annular groove and a second annular groove perpendicular to the axial direction of the first through hole; The first annular groove is used to set an O-ring; The second annular groove is used to cooperate with a screw passing through the threaded through hole on the fixing sleeve to fix the protective sleeve.

4. The tablet press box according to claim 1, characterized in that: It also includes air pipe, solenoid valve and filter pressure reducing valve; The oscillator is a pneumatic oscillator; One end of the filter pressure reducing valve is connected to an external air source, and the other end is connected to a solenoid valve and a pneumatic oscillator in sequence through an air pipe, so as to adjust the oscillation air pressure of the pneumatic oscillator; The solenoid valve is used to control the on and off of the oscillating air pressure.

5. The tablet press box according to claim 1, characterized in that: It also includes a control system for receiving warning information sent by the capacitive sensor.

6. The tablet press box according to claim 1, characterized in that: The film discharging box comprises a film discharging channel body, a glass cover plate, a baffle weldment, a paddle weldment and a corner electromagnet; The sheet discharging channel body is a guide rail structure surrounded by the bottom surface and two side panels; The glass cover plate is sealed and arranged above the guide rail of the sheet discharging channel body; The baffle weldment is a baffle fixedly arranged on the bottom surface, and is used to separate the sheet discharging channel body into a plurality of channels; the baffle is provided with notches penetrating different channels; The corner electromagnet is arranged on the baffle plate below the notch, and is used to drive the paddle plate weldment to swing on the bottom plane, switching to block the notch or blocking the channel on one side of the baffle plate.

7. The tablet press box according to claim 1, characterized in that: The second through hole is close to the upper end of the channel structure.

8. The tablet press box according to claim 1, characterized in that: The oscillator is arranged on the side wall of the film stripping box; The oscillator is arranged at a lower height on the slope of the channel structure than the monitoring component.

9. A method for using a tablet press box, using the tablet press box according to any one of claims 1 to 8, characterized in that: Contains steps: The tablet press cassette is discharging tablets normally, and the oscillator is turned off; In response to the monitoring component detecting that the medium outside the closed end of the protective sleeve changes according to a set condition, the oscillator is started; After the oscillator is started, the monitoring component sends an alarm message that exceeds the set threshold and shuts down the tablet press.

10. A method for using a tablet press box, using the tablet press box according to any one of claims 1 to 8, characterized in that: Contains steps: Set the oscillation period for the oscillator, and the oscillator starts and stops according to the set period, working repeatedly; In response to the monitoring component detecting that the medium outside the closed end of the protective sleeve changes according to a set condition when the oscillator stops working, the oscillator starts.

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