阅读说明：本技术 一种压片环境可控的压片装置及使用方法 (Tabletting device with controllable tabletting environment and use method ) 是由 范茁宁 刘福生 甘云丹 韦丁 蒋城露 华颖鑫 任月虹 张明建 刘其军 于 2019-09-20 设计创作，主要内容包括：本发明涉及物理压片技术领域,具体涉及一种压片环境可控的压片装置及使用方法,包括基座、压片柱、压杆、抽真空装置和加热机构,所述基座、压片柱、压杆自下而上依次设置,所述压片柱内设置有压片通道,所述基座顶部设置有基台,所述基台上套设有第一柔性密封环,所述压杆包括限位部和设置在限位部底部的压片部,压片部上套设有第二柔性密封环。本发明利用加热机构对压片柱进行加热,通过真空泵对工作腔进行抽真空处理,使得工作腔处于负压、高温状态,让材料中的结晶水能够快速蒸发,并在真空泵的抽引下,将水蒸气排出,使得制得的压片材料致密,纯度也更高,而且压片的时间缩短,实现压片的高质量、高效率完成。(The invention relates to the technical field of physical tabletting, in particular to a tabletting device with a controllable tabletting environment and a using method thereof. According to the invention, the heating mechanism is used for heating the tabletting columns, the vacuum pump is used for vacuumizing the working cavity, so that the working cavity is in a negative-pressure and high-temperature state, the crystal water in the material can be rapidly evaporated, and the water vapor is discharged under the suction of the vacuum pump, so that the prepared tabletting material is compact and has higher purity, the tabletting time is shortened, and the high-quality and high-efficiency tabletting is realized.)

1. The utility model provides a controllable film clamp of preforming environment, includes base (1), preforming post (2) and depression bar (3), its characterized in that: the device is characterized by further comprising a vacuumizing device and a heating mechanism, wherein the base (1), the tabletting columns (2) and the pressing rods (3) are sequentially arranged from bottom to top, a tabletting channel (4) is arranged in the tabletting columns (2), a base platform (5) is arranged at the top of the base (1), a first flexible sealing ring (6) is sleeved on the base platform (5), a second flexible sealing ring (9) is sleeved on the pressing rods (3), and the pressing rods (3) and the base platform (5) are inserted into the tabletting channel (4) in a working state; the bottom surface of the pressure lever (3), the tabletting channel (4) and the top surface of the base station (5) are enclosed to form a working cavity (10), the vacuumizing device is used for vacuumizing the working cavity (10), and the heating mechanism is used for heating the working cavity (10).

2. The sheeting apparatus of claim 1, wherein: the pressure lever (3) comprises a limiting part (7) and a pressing piece part (8), the limiting part (7) and the pressing piece part (8) are connected into a whole, and the diameter of the limiting part (7) is larger than that of the pressing piece part (8) and larger than the inner diameter of the pressing piece channel (4); the second flexible sealing ring (9) is sleeved on the outer circumference of the lower half part of the pressing piece part (8) and close to the bottom surface, and in a working state, part or all of the pressing piece part (8) is inserted into the pressing piece channel (4).

3. The sheeting apparatus of claim 1, wherein: the vacuumizing device comprises a vacuum pump (11) and a vacuum tube (12), an air suction hole (16) communicated with the working cavity (10) is formed in the side wall of the tabletting column (2), and the air suction hole (16) is formed in the circumference, close to the bottom surface, of the lower part of the working cavity (10); one end of the vacuum tube (12) is communicated with the working cavity (10) through an air exhaust hole (16), and the other end of the vacuum tube (12) is communicated with the vacuum pump (11); the vacuum pipe (12) is provided with a control valve, and the vacuum pump (11) is provided with a display instrument.

4. The sheeting apparatus of claim 1, wherein: the base (1) and the base platform (5) are integrally formed, and the first flexible sealing ring (6) is sleeved on the circumference of the upper half part of the base platform (5) close to the top surface.

5. A tabletting apparatus as set forth in claim 2, wherein: also comprises a display module (17); the side wall of the tabletting column (2) is further provided with a temperature measuring hole (15), the temperature measuring hole (15) is communicated with the working cavity (10), a temperature sensor is arranged at the temperature measuring hole (15) and used for detecting the temperature in the working cavity (10), and the temperature sensor is electrically connected with the display module (17).

6. The sheeting apparatus of claim 5, wherein: the heating mechanism comprises a resistance wire (13) and an adjuster (14), the resistance wire (13) is wound on the pressing sheet column (2), and the adjuster (14) is used for adjusting voltage and current introduced into the resistance wire (13).

7. The sheeting apparatus of claim 5, wherein: the display device is characterized by further comprising a pressure sensor, wherein the pressure sensor is arranged at the bottom of the base (1) or on the top surface of the base platform (5), and the pressure sensor is electrically connected with the display module (17).

8. The sheeting apparatus of claim 1, wherein: the device also comprises a driving device which is used for pushing the pressing rod (3) to move towards the base (1).

9. A tabletting apparatus as set forth in claim 2, wherein: the base (1), the tabletting columns (2) and the pressing rods (3) are all made of metal materials; the base (1), the base table (5), the pressing column (2), the limiting part (7) and the pressing piece part (8) are cylindrical respectively; the diameter of the base platform (5) is the same as that of the tablet pressing part (8), and the diameters of the base platform and the tablet pressing part are not larger than that of the tablet pressing channel (4); the outer diameters of the first flexible sealing ring (6) and the second flexible sealing ring (9) are both larger than the inner diameter of the tabletting channel (4).

10. A method of using the sheeting apparatus of claim 6, comprising the steps of:

step S1: sleeving a tabletting channel (4) of the tabletting column (2) on a base platform (5) of the base (1), and sealing and matching the base platform (5) and the tabletting channel (4) after sleeving;

step S2: starting a resistance wire (13), adjusting a regulator (14), and raising the temperature of the working cavity (10) to a preset temperature;

step S3: placing the material to be tabletted in a working cavity (10);

step S4: applying pressure to the pressure lever (3) to enable the pressure plate part (8) to move towards the base station (5) in the tabletting channel (4), and starting the vacuum pump (11) to vacuumize the tabletting channel (4) after the pressure plate part (8) enters the tabletting channel (4);

step S5: the temperature and the negative pressure value in the working cavity (10) are checked through the display module (17), when the temperature and the negative pressure value reach set values, pressure is continuously applied to the pressure lever (3), and the pressure lever part (8) presses and forms the material in the working cavity (10);

step S6: after the pressing piece part (8) finishes pressing the materials in the working cavity (10), the pressing rod (3) is upwards pulled out of the pressing passage (4);

step S7: the tabletting channel (4) of the tabletting column (2) is drawn out from the base (5) of the base (1), and the tablet formed by compression is taken out from the tabletting channel (4).

Technical Field

The invention relates to the technical field of physical tabletting, in particular to a tabletting device with a controllable tabletting environment and a using method thereof.

Background

Tabletting, one of dry molding, and tabletting or ring-shaped with a tabletting machine. The raw material powder for molding may be completely dried or have a certain moisture. During molding, the powder is placed in a mold, and a molding agent such as graphite is usually added to facilitate demolding and adjustment of the pore structure. The method has the advantages of being capable of adjusting the pressure of a forming machine and easily preparing the catalyst with required strength. The particles are regular in shape and high in strength, and are particularly advantageous for high pressure or high flow rate reactions. When tabletting, the powders are bonded to each other mainly by van der waals forces. Capillary pressure also increases the bonding capacity in the presence of water. When the molding pressure is not too large, the pore structure and specific surface change. When the pressure is too large, the chemical structure is generally changed in addition to the physical structure, thereby affecting the catalyst activity.

The tabletting technique is not only very important in medical science and biology, but also is an essential link for making samples in scientific research in the fields of physics, chemistry, biology and the like. At present, a common tabletting device, such as a tabletting device disclosed in chinese patent publication No. CN103538797B, which has a better tablet fixing effect, includes a tabletting film, the tabletting film includes a connecting portion and a plurality of fan-shaped pieces, all the fan-shaped pieces are uniformly arranged along the circumferential direction of the connecting portion, and further includes a connecting shaft, the lower end of the connecting shaft is provided with an umbrella-shaped structure with a diameter smaller than that of the tabletting film, an opening of the umbrella-shaped structure faces away from the connecting shaft, and the center of the connecting portion is installed at the center of the umbrella-shaped structure; after the center of the tabletting film is connected to the center of the umbrella-shaped structure, the tabletting film is restrained to be in a conical shape, and the tabletting film has elasticity and corresponding shrinkage at the moment; the connecting shaft has high rigidity, so that the pressing sheet film is prevented from being overturned or moved left and right, the action center of the pressing sheet film is basically fixed, and the pressing sheet film can only adapt to the inclination of the upper surface of the tablet stack in the bottle by self deformation without overlarge inclination. However, the pressed tablet pressed by the tabletting machine has poor transparency, low purity and long tabletting time, and compared with the simple substance density of the granular raw material, the density of the pressed tablet pressed by the tabletting machine is reduced by more than 5%. .

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a tabletting device with controllable tabletting environment and a using method thereof. According to the tabletting device provided by the invention, the heating mechanism is used for heating the tabletting columns, the vacuum pump is used for vacuumizing the working cavity, so that the working cavity is in a negative-pressure and high-temperature state, the crystal water in the material can be quickly evaporated, and the water vapor is discharged under the pumping action of the vacuum pump, so that the prepared tabletting material is compact and has higher purity, the tabletting time is shortened, and the high-quality and high-efficiency tabletting is realized.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a controllable film clamp of preforming environment, includes base, preforming post and depression bar, and its structural feature is: the device comprises a base, a tabletting column and a pressing rod, and is characterized by further comprising a vacuumizing device and a heating mechanism, wherein the base, the tabletting column and the pressing rod are sequentially arranged from bottom to top, a tabletting channel is arranged in the tabletting column, a base station is arranged at the top of the base, a first flexible sealing ring is sleeved on the base station, a second flexible sealing ring is sleeved on the pressing rod, and the pressing rod and the base station are inserted into the tabletting channel in a working state; the bottom surface of depression bar, preforming passageway and the top surface of base station enclose to close and constitute the working chamber, evacuating device is used for carrying out the evacuation to the working chamber, heating mechanism is used for heating the working chamber.

Furthermore, the pressure lever comprises a limiting part and a pressing part, the limiting part and the pressing part are connected into a whole, and the diameter of the limiting part is larger than that of the pressing part and is larger than the inner diameter of the pressing channel; the second flexible sealing ring is sleeved on the outer circumference of the lower half part of the pressing sheet part and close to the bottom surface, and in a working state, part or all of the pressing sheet part is inserted into the pressing sheet channel.

Specifically, in the tabletting device, the vacuumizing device comprises a vacuum pump and a vacuum tube, the side wall of the tabletting column is provided with an air exhaust hole communicated with the working cavity, and the air exhaust hole is formed on the circumference of the lower part of the working cavity close to the bottom surface; one end of the vacuum tube is communicated with the working cavity through an air exhaust hole, and the other end of the vacuum tube is communicated with the vacuum pump; the vacuum pipe is provided with a control valve, and the vacuum pump is provided with a display instrument. In the actual work in-process, when carrying out the preforming to the material, through control vacuum pump work, carry out the evacuation to the working chamber for the pressure reduces in the working chamber, and under negative pressure state, the material is more easily compressed into the piece, and simultaneously, the material that the suppression is flaked is also inseparabler, in addition, has effectively shortened the material time of suppression flakiness, provides preforming efficiency. At the in-process to the working chamber evacuation, can look over the vacuum of working chamber through display instrument, in time know the vacuum change of working chamber, then in time make the adjustment to vacuum according to the preforming demand, let the material carry out the preforming under the best environment to reach anticipated preforming effect, improve preforming efficiency and preforming quality.

Preferably, the base and the base are integrally formed, and the first flexible sealing ring is sleeved on the circumference of the upper half part of the base close to the top surface.

More preferably, the device further comprises a display module; the side wall of the tabletting column is also provided with a temperature measuring hole, the temperature measuring hole is communicated with the working cavity, a temperature sensor is arranged at the temperature measuring hole and used for detecting the temperature in the working cavity, and the temperature sensor is electrically connected with the display module. In the course of the work, through temperature sensor and heating mechanism cooperation, control resistance wire work heats the working chamber, utilize temperature sensor to detect the temperature of working chamber simultaneously, then according to the temperature value that the preforming needs, the work of control regulator, the adjustment lets in the voltage of resistance wire, thereby the heating power of adjustment resistance wire, make the temperature of working chamber reach the predetermined value fast, let the material carry out the preforming in predetermined environment, in order to reach anticipated preforming effect, improve preforming efficiency and preforming quality.

Further, the temperature sensor is a thermocouple.

Furthermore, according to the tabletting device, the heating mechanism comprises a resistance wire and an adjuster, the resistance wire is wound on the tabletting columns, and the adjuster is used for adjusting the voltage and the current introduced into the resistance wire. Through setting up the resistance wire into winding preforming post, electric current and voltage through regulator control lets in the resistance wire, at the preforming in-process, when needing to heat the working chamber, control resistance wire work, heat the preforming post, the heat passes through the preforming post and transmits to the working chamber, thereby realize the heating to the working chamber, utilize temperature sensor to detect the temperature in working chamber simultaneously, then temperature value according to preforming needs, control regulator work, the adjustment lets in the voltage of resistance wire, thereby the heating power of adjustment resistance wire, make the temperature in working chamber reach the predetermined value fast, let the material carry out the preforming in predetermined environment, in order to reach anticipated preforming effect, improve preforming efficiency and preforming quality.

Preferably, the display module further comprises a pressure sensor, the pressure sensor is arranged at the bottom of the base or at the top surface of the base, and the pressure sensor is electrically connected with the display module.

Specifically, the tabletting device further comprises a driving device, and the driving device is used for pushing the pressing rod to move towards the base. In the course of the work, base and preforming post are fixed, and drive arrangement promotes the preforming portion of depression bar and removes to the base station in the preforming passageway, through the material of extrusion work intracavity, realizes the preforming to the material.

Further, the driving device is a jack.

More preferably, the base, the tabletting columns and the pressure rods are all made of metal materials; the base, the base station, the pressing column, the limiting part and the pressing part are all cylindrical; the diameter of the base station is the same as that of the tabletting part and is not more than that of the tabletting channel; the outer diameters of the first flexible sealing ring and the second flexible sealing ring are both larger than the inner diameter of the tabletting channel.

Furthermore, the difference between the diameters of the tabletting channel and the base is 0-0.02 mm.

Further, the temperature measuring hole is sealed through sealant or filled through the sealant. The temperature measuring holes are sealed through the sealant or filled through the sealant, so that the working cavity is kept in a closed environment, the working cavity is vacuumized conveniently when the vacuum pump works, the tightness of equipment is guaranteed, and the tabletting quality and the tabletting efficiency are improved in an auxiliary mode.

Further, the temperature measuring hole and the air suction hole are located on the same horizontal plane.

Further, the temperature measuring hole is close to the base station and arranged above the base station. In the process of tabletting, because the base station and the tabletting columns on the base are kept still, downward pressure is only required to be applied downwards to the pressing rod, the materials in the working cavity can be tabletted, the vacuum degree and the temperature of the working cavity are controlled and known in real time, the temperature measuring holes and the air exhaust holes are arranged on the same horizontal plane, the temperature measuring holes are close to the base station and are arranged above the base station, the temperature measuring holes are communicated with the working cavity constantly, the interruption of the temperature measuring holes and the air exhaust holes along with the tabletting can be avoided, the real-time monitoring is realized, the vacuum degree and the temperature of the working cavity are adjusted, and the convenience of tabletting control is improved.

The using method of the tabletting device comprises the following steps:

step S1: sleeving a tabletting channel of the tabletting column on a base table of the base, and sealing and matching the base table with the tabletting channel after sleeving;

step S2: starting the resistance wire, adjusting the regulator, and raising the temperature of the working cavity to a preset temperature;

step S3: placing the material to be tabletted in a working cavity;

step S4: applying pressure to the pressure lever to enable the pressing sheet part to move towards the base station in the pressing sheet channel, and starting the vacuum pump to vacuumize the pressing sheet channel after the pressing sheet part enters the pressing sheet channel;

step S5: checking the temperature and the negative pressure value in the working cavity through the display module, and continuously applying pressure to the pressure lever when the temperature and the negative pressure value reach set values to enable the pressure lever part to press and form the material in the working cavity;

step S6: after the pressing piece part finishes pressing the materials in the working cavity, the pressing rod is upwards pulled out of the pressing channel;

step S7: and drawing out the tabletting channel of the tabletting column from the base of the base, and taking out the tabletting formed by compression from the tabletting channel.

Further, the vacuum in the working chamber was kept constant during the tabletting process.

The invention adopts the technical scheme that the method has the beneficial effects that: according to the tabletting device with the controllable tabletting environment and the using method thereof, the heating mechanism is used for heating the tabletting columns, the vacuum pump is used for vacuumizing the working cavity, so that the working cavity is in a negative-pressure and high-temperature state, crystal water in the material can be quickly evaporated, and water vapor is discharged under the suction of the vacuum pump, so that the prepared tabletting material is compact and has higher purity, the tabletting time is shortened, and the high-quality and high-efficiency tabletting is realized.

Drawings

FIG. 1 is a schematic view of the tablet press apparatus of the present invention;

FIG. 2 is a cross-sectional view of a preform column of the present invention;

in the figure, 1-base, 2-tabletting column, 3-pressure rod, 4-tabletting channel, 5-base, 6-first flexible sealing ring, 7-limiting part, 8-pressure piece part, 9-second flexible sealing ring, 10-working cavity, 11-vacuum pump, 12-vacuum tube, 13-resistance wire, 14-regulator, 15-temperature measuring hole, 16-air extracting hole and 17-display module.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

As shown in fig. 1 and 2, a tablet pressing device with a controllable tablet pressing environment comprises a base 1, a tablet pressing column 2, a pressing rod 3, a vacuum pumping device and a heating mechanism, wherein the base 1, the tablet pressing column 2 and the pressing rod 3 are sequentially arranged from bottom to top, a tablet pressing channel 4 is arranged in the tablet pressing column 2, a base platform 5 is arranged on the top of the base 1, and in the embodiment, the base 1 and the base platform 5 are integrally formed. The base station 5 is sleeved with a first flexible sealing ring 6, and the first flexible sealing ring 6 is sleeved on the circumference of the upper half part of the base station 5 close to the top surface; in the working state, the base station 5 is inserted in the tabletting channel 4; the pressure lever 3 comprises a limiting part 7 and a pressing part 8 arranged at the bottom of the limiting part 7, the limiting part 7 and the pressing part 8 are connected into a whole, and the outer diameter of the limiting part 7 is larger than the diameter of the pressing part 8 and larger than the inner diameter of the pressing channel 4; a second flexible sealing ring 9 is sleeved on the pressure plate part 8, and the second flexible sealing ring 9 is sleeved on the circumference of the lower half part of the pressure plate part 8 close to the bottom surface; in the working state, part or all of the tabletting part 8 of the pressure lever 3 is inserted into the tabletting channel 4; and the bottom surface of the tabletting part 8, the tabletting channel 4 and the top surface of the base station 5 are enclosed to form a working cavity 10, the vacuumizing device is used for vacuumizing the working cavity 10, and the heating mechanism is used for heating the working cavity 10. The first flexible sealing ring 6 and the second flexible sealing ring 9 are both made of high-temperature-resistant rubber materials and can resist the environmental temperature in the working cavity 10 in the pressing sheet process.

The vacuumizing device comprises a vacuum pump 11 and a vacuum tube 12, the side wall of the tabletting column 2 is provided with an air extracting hole 16 communicated with the working cavity 10, and the air extracting hole 16 is arranged on the circumference of the lower part of the working cavity 10 close to the bottom surface; one end of the vacuum tube 12 is communicated with the working cavity 10 through the air exhaust hole 16, and the other end of the vacuum tube 12 is communicated with the vacuum pump 11.

In the present embodiment, a display module 17 and a pressure sensor (not shown in the figure) are further provided, specifically, a pressure sensor is provided at the bottom of the base 1, that is, the pressure sensor is provided between the bottom of the base 1 and the working table on which the tablet compressing device is placed; of course, the pressure sensor may be disposed on the top of the base 5, and when the pressure sensor is disposed on the top of the base 5, it is necessary to drill a cable hole of the pressure sensor on the base 5 and the base 1. Utilize pressure sensor to detect the material at the preforming in-process pressure size that receives to electrically connect pressure sensor and display module 17, show the pressure value in the course of the work on display module 17, then according to the pressure that detects, the pressure that acts on depression bar 3 is adjusted to the pertinence, realizes the accurate regulation of preforming pressure.

Specifically, the base 1, the pressing sheet column 2 and the pressing rod 3 are made of metal materials respectively. Preferably, the base 1, the pressing column 2 and the pressing rod 3 are made of steel materials respectively.

Specifically, the base 1, the base 5, the pressing column 2, the limiting portion 7 and the pressing piece portion 8 are respectively cylindrical. Preferably, the diameter of the base 5 is the same as that of the tablet pressing part 8, and the diameter of the base 5 is not larger than that of the tablet pressing channel 4.

Specifically, the difference between the diameters of the tabletting channel 4 and the base 5 is 0 to 0.02 mm. Preferably, the first flexible sealing ring 6 and the second flexible sealing ring 9 have an outer diameter larger than the diameter of the tabletting channel 4.

In the actual work in-process, when carrying out the preforming to the material, through the work of control vacuum pump 11, carry out the evacuation to working chamber 10 for pressure reduces in working chamber 10, and under negative pressure state, the material is compressed into the piece more easily, and simultaneously, the material that the suppression is flaked is also inseparabler, and in addition, carrying out the preforming under negative pressure state has still effectively shortened the time that the material suppression is flaked, has improved preforming efficiency.

In particular, the vacuum tube 12 is provided with a control valve, not shown in the figures.

Specifically, still be provided with the display instrument on vacuum pump 11, at the in-process to working chamber 10 evacuation, can look over the vacuum of working chamber 10 through the display instrument, in time know the vacuum change of working chamber 10, then in time make the adjustment to vacuum according to the preforming demand, let the material carry out the preforming under the best environment to reach anticipated preforming effect, improve preforming efficiency and preforming quality.

Specifically, the heating mechanism comprises a resistance wire 13 and a regulator 14, the resistance wire 13 is wound around the tabletting column 2, and the regulator 14 is used for controlling the voltage and the current introduced into the resistance wire 13. Through setting up resistance wire 13 into winding preforming post 2, voltage and the electric current that lets in resistance wire 13 through regulator 14 control, at the preforming in-process, when needing to heat working chamber 10, control resistance wire 13 work, heat preforming post 2, the heat transmits to working chamber 10 through preforming post 2, thereby realize the heating to working chamber 10, utilize temperature sensor to detect the temperature of working chamber 10 simultaneously, then according to the temperature value that the preforming needs, control regulator 14 work, the adjustment lets in voltage and the electric current of resistance wire 13, thereby the heating power of adjustment resistance wire 13, make the preset value of quick adjustment of working chamber 10's temperature, let the material carry out the preforming in predetermined environment, in order to reach anticipated preforming effect, improve preforming efficiency and preforming quality.

Specifically, a temperature measuring hole 15 is formed in the side wall of the tabletting column 2, the temperature measuring hole 15 is communicated with the working cavity 10, a temperature sensor is arranged at the temperature measuring hole and used for detecting the temperature of the working cavity 10, and the temperature sensor is electrically connected with the display module 17. In the course of the work, through temperature sensor and heating mechanism cooperation, control resistance wire 13 work, heat working chamber 10, utilize temperature sensor to detect working chamber 10's temperature simultaneously, then according to the temperature value that the preforming needs, control regulator 14 work, the adjustment lets in the voltage and the electric current of resistance wire 13, thereby the heating power of adjustment resistance wire 13, make working chamber 10's temperature reach the predetermined value fast, let the material carry out the preforming in predetermined environment, in order to reach anticipated preforming effect, improve preforming efficiency and preforming quality.

Specifically, the temperature sensor is a thermocouple.

Specifically, the temperature measuring hole 15 is sealed by a sealant or filled by a sealant. The temperature measuring holes 15 are sealed through the sealant or the temperature measuring holes 15 are filled through the sealant, so that the working chamber 10 is kept in a closed environment, the vacuum pump 11 is convenient to vacuumize the working chamber 10 when working, the tightness of the working chamber 10 is guaranteed, and the tabletting quality and the tabletting efficiency are improved in an auxiliary mode.

Specifically, the temperature measuring hole 15 and the air pumping hole 16 are located on the same horizontal plane, and the temperature measuring hole 15 and the air pumping hole 16 are respectively located on two sides of the working cavity 10, that is, the temperature measuring hole 15 is also arranged on the circumference of the lower portion of the working cavity 10 close to the bottom surface.

Specifically, the temperature measuring hole 15 is close to the base 5, and the temperature measuring hole 15 is arranged above the base 5. In the tabletting process, the base station 5 and the tabletting columns 2 on the base 1 are kept still, and only downward pressure is required to be applied to the compression bar 3, so that materials in the working cavity 10 can be tabletted, and in order to ensure that the vacuum degree and the temperature of the working cavity 10 are mastered and known in real time, the temperature measuring hole 15 and the air exhaust hole 16 are arranged on the same horizontal plane, the temperature measuring hole 15 is close to the base station 5, and the temperature measuring hole 15 is arranged above the base station 5, so that the temperature measuring hole 15 and the air exhaust hole 16 are communicated with the working cavity 10 constantly, interruption along with the tabletting is avoided, real-time monitoring is realized, the vacuum degree and the temperature of the working cavity 10 are adjusted, and the tabletting control convenience is improved.

Specifically, the tablet pressing device further comprises a display module 17, and the display module 17 is connected with a temperature sensor. Preferably, the pressure sensor is connected to the display module 17. In the in-process of preforming, the temperature in the temperature sensor that utilizes the setting to locate 15 temperature measurement holes detects working chamber 10, utilize pressure sensor to detect the pressure that the material received, and data transfer to display module 17 that detects temperature sensor and pressure sensor shows, let the user in time know the temperature of working chamber 10, the preforming pressure that the material received, then control regulator 14 and drive arrangement work, according to the preforming pressure that the temperature of user demand adjustment working chamber 10 and material received, let the whole process of preforming accomplish under controllable condition. Through the display instrument that sets up on the vacuum pump 11, the user can know the vacuum degree of working chamber 10, then according to the user demand, in time adjusts the operating condition of vacuum pump 11 to change the vacuum degree of working chamber 10, realize the customization preforming. Of course, it is also possible to replace the display instrument provided on the vacuum pump 11 with a vacuum degree sensor and electrically connect the vacuum degree sensor to the display module 17, so that the vacuum degree of the working chamber 10 can be checked through the display module 17, which has similar beneficial effects as the display instrument.

Preferably, the display module 17 is a display screen.

Specifically, the tablet pressing device further comprises a driving device which is used for pushing the pressing rod 3 to move towards the base 1. In the working process, the base 1 and the tabletting columns 2 are fixed, the driving device pushes the tabletting parts 8 of the pressing rods 3 to move towards the base station 5 in the tabletting channel 4, and the tabletting of materials is realized by extruding the materials in the working cavity 10.

In particular, the drive means is a jack.

According to the using method of the tabletting device, the material to be tabletted is placed in the working cavity 10, then pressure is applied to the pressing rod 3, the pressing piece part 8 moves towards the base station 5 in the tabletting channel 4, the heating mechanism is controlled to heat the tabletting columns 2, the working cavity 10 is heated, the vacuumizing device is controlled to work to vacuumize the working cavity 10, and the material is tabletted in a heating and negative pressure state. After the material is pressed and formed, the tabletting column 2 is lifted upwards to separate the tabletting column 2 from the base 5, and then the pressed and formed tablet is poked out from the tabletting channel 4 by a thin rod, so that the pressed and formed tablet can be taken out.

Specifically, the vacuum level within the working chamber 10 remains constant during the sheeting process.

Specifically, before tabletting, the heating mechanism is controlled to work, and the tabletting columns 2 are preheated.

The tabletting device of the embodiment is used for carrying out the tabletting operation method, and comprises the following steps:

step S1: sleeving a tabletting channel 4 of the tabletting column 2 on a base table 5 of the base 1, and after sleeving, sealing and matching the base table 5 and the tabletting channel 4;

step S2: starting the resistance wire 13, adjusting the regulator 14, and raising the temperature of the working cavity 10 to a preset temperature;

step S3: placing the material to be tabletted in the working chamber 10;

step S4: applying pressure to the pressure lever 3 to enable the pressure plate part 8 to move towards the base station 5 in the tabletting channel 4, and starting the vacuum pump 11 to vacuumize the inside of the tabletting channel 4 after the pressure plate part 8 enters the tabletting channel 4;

step S5: the temperature and the negative pressure value in the working cavity 10 are checked through the display module 17, when the temperature and the negative pressure value reach set values, pressure is continuously applied to the pressure rod 3, and the pressure rod part 8 is used for carrying out compression molding on the material in the working cavity 10;

step S6: after the pressing piece part 8 finishes the pressing keeping time of the materials in the working cavity 10, the pressing rod 3 is upwards drawn out of the pressing passage 4;

step S7: the tablet passage 4 of the tablet post 2 is pulled out from the base 5 of the base 1, and the tablet formed by compression is taken out from the tablet passage 4.

Test examples

When the tabletting device is used for tabletting, firstly, a compression rod 3 is pulled out from a tabletting column 2, then, the ammonium nitrate material is placed in a tabletting channel 4 of the tabletting column 2, then, a compression piece part 8 of the compression rod 3 is inserted into the tabletting channel 4, a heating mechanism and a vacuum pump 12 are controlled to work, the compression column 2 is heated by the heating mechanism, heat is transferred to a working cavity 10 through the tabletting column 2, the working cavity 10 is heated, the temperature of the working cavity 10 is heated to 100 ℃, and the vacuum pump 11 is used for vacuumizing the working cavity 10, so that the pressure in the working cavity 10 is reduced, the material is more easily compressed into a tablet under a negative pressure state, and the material pressed into the tablet is more compact, on the other hand, when the working chamber 10 is in a negative pressure state, the pressure piece part 8 is used for moving towards the base station 5, the moving resistance of the pressure rod 3 is reduced, after the temperature and the vacuum degree of the working chamber 10 reach preset values, the temperature and the pressure in the working chamber 10 are kept constant, then the driving device is controlled to work, the driving device is used for pushing the pressure piece part 8 of the pressure rod 3 to move towards the base station in the pressure piece channel 4, the materials in the working chamber are squeezed, the material is pressed, the pressure is controlled to be 20MPa in the pressing process, and under the working pressure, the working chamber 10 is in a negative pressure and high temperature state, so that knots in the ammonium nitrate material are formedThe crystal water can be quickly evaporated, and the water vapor is discharged under the pumping action of a vacuum pump, so that the prepared ammonium nitrate sheet is compact in quality, and the density reaches 1.69g/cm³The elementary substance density of the granular ammonium nitrate under the normal state is 1.72g/cm³Compared with the raw materials, the density of the tablet is about 1.7 percent, the transparency is good, the purity is high, the tabletting time is short, and the tabletting can be finished with high quality and high efficiency. In addition, the same method is adopted to carry out tabletting treatment on the sulfur, the pressure is controlled to be 20MPa in the tabletting process, the temperature of a working cavity is 40 ℃, and the density of the sulfur sheet obtained by pressing is 2.03g/cm³The elemental density of the normally granulated sulfur was 2.07g/cm³And more than ten sheets are continuously pressed, the density difference is not more than 2%, the obtained sulfur sheet has very stable density, very smooth surface and obviously improved transparency.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.