Automatic capsule filling machine for granular medicines

Abstract

The present invention relates to the technical field of capsule filling machines and discloses an automatic capsule filling machine for granular medicines, comprising: a filling machine main body, on which an auxiliary adjustment component and multiple groups of capsule diameter adjustment mechanisms are provided; the capsule diameter adjustment mechanisms include a main mold and a diameter adjustment component and a pressure component matched therewith; a plurality of diameter adjustment components are distributed in an array in a powder filling area of ​​the main mold; each diameter adjustment component comprises a capsule main opening; a main diameter adjustment spring is coaxially embedded in the capsule main opening; the main diameter adjustment spring has a spring-like structure and is filled with rosin to form a shaping medium; the upper and lower end points of the main diameter adjustment spring are respectively connected to the pressure component through a diameter control rope to form a transmission connection; the present invention realizes precise adjustment and rapid shaping of the capsule diameter through the synergistic effect of the main diameter adjustment spring and the rosin shaping medium; the main diameter adjustment spring adopts a spring-like structure design and is filled with rosin as the shaping medium; the main diameter adjustment spring utilizes the low-temperature solidification and high-temperature melting characteristics of the rosin to accurately control the deformation process of the capsule diameter.

Description

Technical Field

[0001] The present invention relates to the field of capsule filling machines, and more particularly to an automatic capsule filling machine for granular medicines. Background Art

[0002] In the pharmaceutical industry, capsules are one of the core dosage forms for drug delivery, and their specification consistency directly affects the drug filling accuracy and clinical efficacy. Taking pimavanserin capsules as an example, since the single-capsule filling amount of this drug is as low as less than 0.5 mg, the capsule filling machine's caliber adaptation accuracy must reach the micron level. However, traditional capsule filling machines usually use a mechanical caliber adjustment structure to adapt the capsule caliber by replacing molds of different specifications.

[0003] Existing technologies often rely on physical contact with rigid molds to achieve diameter adjustment. Limited by mold machining errors and mechanical transmission backlash, the capsule diameter tolerance is typically greater than ±0.1mm, making it difficult to meet the stringent filling accuracy requirements of micro-dose medications such as pimavanserin capsules. Furthermore, switching between sizes requires manual replacement of the entire mold assembly, resulting in equipment downtime of up to 30 to 60 minutes, significantly reducing production line efficiency. Therefore, we propose an automatic capsule filling machine for granular pharmaceuticals. Summary of the Invention

[0004] The present invention provides an automatic capsule filling machine for granular medicines, which solves the technical problem in the related art that a whole set of mold components must be manually replaced, resulting in equipment downtime of up to 30 to 60 minutes and a significant reduction in production line efficiency.

[0005] The present invention provides an automatic capsule filling machine for granular medicines, comprising: a filling machine main body, on which an auxiliary adjustment component and multiple groups of capsule diameter adjustment mechanisms are provided;

[0006] The capsule diameter adjustment mechanism includes a main mold and its matching diameter adjustment component and pressure component. Multiple diameter adjustment components are arranged in an array in the powder filling area of ​​the main mold. Each diameter adjustment component includes a capsule main opening, in which a main diameter adjustment spring is coaxially embedded. The main diameter adjustment spring has a spring-like structure and is filled with rosin to form a shaping medium. Its upper and lower ends are respectively connected to the pressure component through a diameter control rope to form a transmission connection.

[0007] The auxiliary adjustment component is set on the rotation path of the main mold and includes a replaceable mold head. The mold head has a dual-mode conduction function of hot and cold. When performing the diameter adjustment operation, the mold head generates heat to melt the rosin. As the mold head is gradually inserted into the main opening of the capsule and applies axial pressure to the pressure component, the pressure component generates symmetrical tension on both ends of the main diameter adjustment spring through the diameter control rope, forcing the inner wall of the capsule main opening to elastically deform and completely fit the outer diameter of the mold head. Finally, the mold head is cooled to solidify the rosin to achieve precise shaping of the capsule diameter.

[0008] Furthermore, an automatic turntable with a driving rotation function is set at the center of the working area of ​​the filling machine body. Several main molds are fixed on the automatic turntable at equal distances. The automatic turntable drives multiple main molds to pass through different work flow areas in sequence, and includes a working area of ​​the auxiliary adjustment component to adjust the diameter of the main mouth of the capsule of the main mold.

[0009] Furthermore, the auxiliary adjustment component also includes an elevator, on which the electric heating module and the refrigeration module are fixedly installed, and several mold heads are installed on the lower wall of the elevator head, which has a detachable function, and the several mold heads are aligned with the center of the main opening of the capsule.

[0010] Furthermore, the main diameter-adjusting spring consists of three parts: a plastic sheet, a storage capsule and rosin. The storage capsule is fixedly connected to the plastic sheet, so that the interior of the main diameter-adjusting spring is hollow for filling with rosin. The plastic sheet is located on the inner ring wall of the main diameter-adjusting spring.

[0011] Furthermore, a plurality of dividing pressure strips are fixedly provided on one side of the capsule main opening close to the plastic sheet, and the plurality of dividing pressure strips are longitudinal, and the length dimension is the same as the internal height dimension of the capsule main opening.

[0012] Furthermore, the pressure-bearing component includes a pressure-bearing head that passes through the main mold, a pressure-limiting column is slidably arranged at the inner center position of the pressure-bearing head, a spring 1 is fixedly arranged above the pressure-limiting column, and a spring 2 is fixedly arranged inside the pressure-limiting column. The pressure-bearing value of spring 2 is greater than the pressure-bearing value of spring 1, and the pressure-bearing head and the pressure-limiting column are both slidably connected to the main mold.

[0013] Furthermore, a main control wire is fixedly provided on one side of the pressure head, and the main control wire runs through the main mold and is movably connected. A support wire 1 and a support wire 2 are fixedly provided on the end of the main control wire away from the pressure head, and the support wire 2 is fixedly connected to several diameter control ropes.

[0014] Furthermore, a sub-mold is provided above the powder filling area of ​​the main mold, and the internal array of the sub-mold has several capsule sub-mouths, and the inside of the capsule sub-mouths is provided with a sub-diameter adjusting spring, and the structure of the sub-diameter adjusting spring is the same as that of the main diameter adjusting spring.

[0015] Furthermore, two tension spring blocks are slidingly provided on the side wall of the auxiliary mold, and a hole groove is opened at the center position of the tension spring block. Both tension spring blocks are slidingly connected to the auxiliary mold, and the two tension spring blocks are respectively connected to the auxiliary diameter-adjusting spring through silk threads.

[0016] Furthermore, a slide groove is provided on one side of the main mold close to the tension spring block, and two sliders are provided for sliding inside the slide groove, and the two sliders correspond one-to-one to the two tension spring blocks. A telescopic column is provided for sliding inside the slider, and the inner end point of the telescopic column is fixedly provided with a telescopic column, and the telescopic column is fixedly connected to the support wire.

[0017] The beneficial effects of the present invention are:

[0018] The present invention achieves precise adjustment and rapid shaping of the capsule caliber through the synergistic effect of the main diameter-adjusting spring and the rosin shaping medium. The main diameter-adjusting spring adopts a spring-like structure design and is filled with rosin as the shaping medium. Utilizing the low-temperature solidification and high-temperature melting properties of rosin, combined with the hot and cold dual-mode die head of the auxiliary adjustment component, the deformation process of the capsule caliber can be precisely controlled.

[0019] During the diameter adjustment operation, the mold head heats up to melt the rosin, and the pressure component is driven by progressive axial pressure. Symmetrical tension is applied to both ends of the main diameter adjustment spring through the diameter control rope, forcing the inner wall of the capsule main mouth to elastically deform and completely fit the outer diameter of the mold head. This process is dual-controlled by mechanical transmission and material phase change to ensure that the diameter adjustment accuracy reaches the micron level. At the same time, the rosin forms a rigid support after solidification, permanently maintaining the adjusted diameter size. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the elevator of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the automatic turntable of the present invention;

[0023] Figure 4 It is a schematic diagram of the auxiliary mold structure of the present invention;

[0024] Figure 5 Schematic diagram of the internal structure of the auxiliary mold of the present invention;

[0025] Figure 6 It is a schematic diagram of the main opening structure of the capsule of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the pressure head of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the main diameter adjustment spring of the present invention;

[0028] Figure 9 It is a schematic diagram of the internal structure of the pressure head of the present invention;

[0029] Figure 10 It is a schematic diagram of the side wall of the auxiliary mold of the present invention.

[0030] In the figure: 11. Filling machine body; 12. Automatic turntable; 2. Capsule diameter adjustment mechanism; 21. Main mold; 22. Sub-mold; 23. Capsule main opening; 24. Capsule sub-opening; 25. Sub-diameter adjustment spring; 26. Main diameter adjustment spring; 261. Plastic sheet; 262. Storage capsule; 263. Rosin; 27. Dividing pressure strip; 28. Diameter control rope; 31. Pressure head; 32. Main control wire; 33. Support wire 1; 34. Support wire 2; 35. Pressure limiting column; 36. Spring 1; 37. Spring 2; 41. Elevator; 42. Electric heating module; 43. Refrigeration module; 44. Mold head; 51. Slider; 52. Telescopic column; 54. Slide; 55. Tension spring block; 56. Hole slot. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0032] like Figure 1 - Figure 10 As shown, an automatic capsule filling machine for granular medicines comprises: a filling machine body 11, on which an auxiliary adjustment component and a plurality of capsule diameter adjustment mechanisms 2 are provided;

[0033] The capsule diameter adjustment mechanism 2 includes a main mold 21 and a diameter adjustment component and a pressure component that cooperate with it. Multiple diameter adjustment components are arranged in an array in the powder filling area of ​​the main mold 21. Each diameter adjustment component includes a capsule main opening 23. A main diameter adjustment spring 26 is coaxially embedded in the capsule main opening 23. The main diameter adjustment spring 26 has a spring-like structure and is filled with rosin 263 to form a shaping medium. Its upper and lower ends are respectively connected to the pressure component through a diameter control rope 28 to form a transmission connection.

[0034] The main diameter adjustment spring 26 is embedded in the inner wall of the capsule main opening 23, and the rosin 263 is sealed in the storage capsule 262. The medicine only contacts the inner cavity of the capsule and has no direct contact with the diameter adjustment mechanism. "Filling of granular medicine" occurs after the diameter adjustment is completed.

[0035] The auxiliary adjustment component is arranged on the rotation path of the main mold 21 and includes a replaceable mold head 44. The mold head 44 has a hot and cold dual-mode conduction function. When the diameter adjustment operation is performed, the mold head 44 generates heat to melt the rosin 263, and the mold head 44 is gradually inserted into the capsule main opening 23 and applies axial pressure to the pressure component. The pressure component generates symmetrical tension on both ends of the main diameter adjustment spring 26 through the diameter control rope 28, forcing the inner wall of the capsule main opening 23 to elastically deform and completely fit the outer diameter of the mold head 44. Finally, the mold head 44 is cooled to solidify the rosin 263 to achieve precise shaping of the capsule diameter.

[0036] An automatic turntable 12 with a driving rotation function is set at the center of the working area of ​​the filling machine body 11. Several main molds 21 are fixed on the automatic turntable 12 at equal intervals. The automatic turntable 12 drives multiple main molds 21 through different work flow areas in sequence. It also includes a working area for the auxiliary adjustment component to adjust the diameter of the capsule main opening 23 of the main mold 21.

[0037] The auxiliary adjustment component also includes an elevator 41, on the lifting head of which an electric heating module 42 and a cooling module 43 are fixedly installed, and several mold heads 44 are installed on the lower wall of the lifting head of the elevator 41, which has a detachable function. Several mold heads 44 are aligned with the center of the capsule main opening 23.

[0038] The main diameter-adjusting spring 26 consists of three parts: a plastic sheet 261, a storage capsule 262 and rosin 263. The storage capsule 262 is fixedly connected to the plastic sheet 261, so that the interior of the main diameter-adjusting spring 26 is hollow for filling with rosin 263. The plastic sheet 261 is located on the inner ring wall of the main diameter-adjusting spring 26.

[0039] After the die head 44 is inserted, the non-rosin 263 flows autonomously through the mechanical transmission chain of axial pressure → pressure component → diameter control rope 28 → symmetrical tension, forcing the inner wall of the capsule main opening 23 to elastically deform and fit the outer diameter of the die head 44.

[0040] A plurality of dividing strips 27 are fixedly provided on one side of the capsule main opening 23 close to the plastic sheet 261 , and the plurality of dividing strips 27 are longitudinally oriented, and their length is the same as the inner height of the capsule main opening 23 .

[0041] The pressure-bearing component includes a pressure-bearing head 31 that passes through the main mold 21. A pressure-limiting column 35 is slidably arranged at the inner center position of the pressure-bearing head 31. A spring 1 36 is fixedly arranged above the pressure-limiting column 35. A spring 2 37 is fixedly arranged inside the pressure-limiting column 35. The pressure-bearing value of spring 2 37 is greater than the pressure-bearing value of spring 1 36. The pressure-bearing head 31 and the pressure-limiting column 35 are both slidably connected to the main mold 21.

[0042] A master control wire 32 is fixedly provided on one side of the pressure head 31, and the master control wire 32 passes through the main mold 21 and is movably connected. A support wire 1 33 and a support wire 2 34 are fixedly provided on the end of the master control wire 32 away from the pressure head 31, and the support wire 2 34 is fixedly connected to several diameter control ropes 28.

[0043] A sub-mold 22 is provided above the powder filling area of ​​the main mold 21. The internal array of the sub-mold 22 has several capsule sub-openings 24. The inside of the capsule sub-openings 24 is provided with a sub-diameter adjusting spring 25, and the structure of the sub-diameter adjusting spring 25 is the same as that of the main diameter adjusting spring 26.

[0044] Two tension spring blocks 55 are slidingly provided on the side wall of the auxiliary mold 22. A hole groove 56 is opened at the center position of the tension spring block 55. The two tension spring blocks 55 are both slidingly connected to the auxiliary mold 22, and the two tension spring blocks 55 are respectively connected to the auxiliary diameter-adjusting spring 25 through silk threads.

[0045] A slide groove 54 is provided on one side of the main mold 21 near the tension spring block 55. Two sliders 51 are slidingly provided inside the slide groove 54, and the two sliders 51 correspond one-to-one to the two tension spring blocks 55. A telescopic column 52 is slidingly provided inside the slider 51. The inner end point of the telescopic column 52 is fixedly provided with the telescopic column 52, and the telescopic column 52 is fixedly connected to the support wire 33.

[0046] When it is necessary to fill granules into capsules of different sizes, the system first controls the main mold 21 and the auxiliary mold 22 to be combined. The automatic turntable 12 then drives the main mold 21 and the auxiliary mold 22 to pass under the working area of ​​the elevator 41 in sequence. A mold head 44 of the same size as the next capsule to be produced is positioned on the lower wall of the elevator 41. The length of the mold head 44 is greater than the combined thickness of the main mold 21 and the auxiliary mold 22, and the lowering dimension of the elevator head matches the mold head 44.

[0047] When the main mold 21 and the auxiliary mold 22 pass under the working area of ​​the elevator 41, the electric heating module 42 is controlled to work, and the lifting head of the elevator 41 is heated to a specified temperature. The high temperature is transferred to each mold head 44 through the lifting head. Then, the lifting head is controlled to descend, so that the multiple mold heads 44 are slowly inserted into the corresponding capsule auxiliary openings 24, and then inserted into the capsule main opening 23 through the capsule auxiliary openings 24. The high-temperature mold head 44 slowly moves downward to melt the rosin 263 in the auxiliary diameter-adjusting spring 25 and the main diameter-adjusting spring 26.

[0048] As the die head 44 is fully inserted into the capsule auxiliary opening 24 and the capsule main opening 23, the lifting head presses down the pressure head 31, and the pressure head 31 pulls the main control wire 32, and the main control wire 32 simultaneously pulls the support wire 1 33 and the support wire 2 34. The pressure head 31 is lowered in two stages by the spring 1 36 and the spring 2 37.

[0049] When the support wire 33 is pulled, the telescopic column 52 is first extended a short distance and inserted into the hole 56. The connection end of the support wire 33 and the telescopic column 52 forms an S shape in the main mold 21. In this way, the telescopic column 52 can be pushed out first. Then, under continuous tension, the two sliders 51 are pulled simultaneously, thereby driving the two tension spring blocks 55 to slide, tightening the auxiliary diameter-adjusting spring 25, so that the capsule auxiliary opening 24 is tightly attached to the mold head 44.

[0050] When the second support wire 34 is pulled, several diameter-controlling ropes 28 are tightened at the same time, thereby simultaneously tightening the main diameter-adjusting spring 26, so that the capsule main opening 23 is tightly fitted with the die head 44. In addition, the pressure strip 27 can ensure the flatness of the capsule main opening 23, and the plastic sheet 261 prevents the inner wall from being uneven due to the pressure of the rosin 263.

[0051] The above operation processes are all carried out synchronously. When both the capsule main opening 23 and the capsule auxiliary opening 24 are in close contact with the die head 44, the electric heating module 42 stops working and the refrigeration module 43 starts working to cool the die head 44. The low temperature is transmitted to the auxiliary diameter adjustment spring 25 and the main diameter adjustment spring 26 to cool and solidify the rosin 263. After the rosin 263 solidifies, the next die can be adjusted. The diameter adjustment can be completed without disassembling all the molds.

[0052] Filling machine body 11 and multiple groups of capsule diameter adjustment mechanisms 2: Through the coordinated work of multiple groups of capsule diameter adjustment mechanisms 2, combined with the rotation drive of the automatic turntable 12, multi-station continuous operation is achieved, which significantly improves the capsule filling and diameter adjustment efficiency and adapts to large-scale production needs.

[0053] Main diameter-adjusting spring 26 and rosin 263 shaping medium: Rosin 263 can be precisely shaped by the die head 44 after being heated and melted, and solidified and shaped after being cooled, thereby realizing stepless adjustment of the capsule diameter, taking into account both elastic deformation and rigidity maintenance, and adapting to the rapid switching of capsules of different specifications.

[0054] Auxiliary adjustment component: The mold head 44 has hot and cold dual-mode functions. The electric heating module 42 heats and melts the rosin 263, and the refrigeration module 43 cools and solidifies it, so that the diameter adjustment can be completed in a single clamping, avoiding repeated disassembly and assembly of the mold.

[0055] Interchangeable die head 44: adapts to various capsule models and reduces equipment downtime for changeovers.

[0056] The pressure dividing strips 27 are distributed longitudinally to ensure that the capsule main opening 23 is deformed evenly when pressurized, thereby avoiding local wrinkles or deformation.

[0057] The inner ring of the plastic sheet 261 is fixed to prevent the inner wall from collapsing when the rosin 263 is under pressure, thereby ensuring the roundness of the diameter and the smoothness of the surface.

[0058] Pressure-bearing components: Spring 1 36 and spring 2 37 bear pressure in stages: two-stage pressure control is achieved through the pressure-limiting column 35. The auxiliary diameter-adjusting spring 25 is pre-tightened with low pressure, and then the main diameter-adjusting spring 26 is tightened with high pressure to avoid damage to the mold due to overpressure.

[0059] The main control wire 32 links the support wire 1 33 and the support wire 2 34 to synchronously control the diameter adjustment action of the auxiliary mold 22 and the main mold 21 to ensure the coaxiality of the main and auxiliary openings of the capsule.

[0060] The auxiliary diameter-adjusting spring 25 and the main diameter-adjusting spring 26 share the same structure: the tension spring block 55 is linked with the support wire 33 to achieve synchronous diameter adjustment of the main and auxiliary molds, simplifying the mechanical structure.

[0061] The guide groove 54 and the slider 51 ensure the translation accuracy of the tension spring block 55 and prevent the auxiliary diameter-adjusting spring 25 from being stretched and deflected.

[0062] Mold pre-merger and positioning:

[0063] The main mold 21 and the auxiliary mold 22 are closed, and the automatic turntable 12 drives them to rotate to below the auxiliary adjustment component, and the mold head 44 is aligned with the capsule main opening 23 and the capsule auxiliary opening 24.

[0064] Die head 44 heating and insertion:

[0065] The electric heating module 42 heats the die head 44 to the melting point of the rosin 263 , and the elevator 41 drives the die head 44 to insert into the main and auxiliary ports, so as to melt the rosin 263 and form it into a plastic state.

[0066] Dual-stage pressure is applied simultaneously:

[0067] The die head 44 presses down the pressure head 31, and the support wire 1 33 and the support wire 2 34 are linked through the master control wire 32:

[0068] First stage: the support wire 33 pulls the slider 51, tightening the auxiliary diameter-adjusting spring 25, so that the auxiliary port fits the die head 44.

[0069] Second stage: The second support wire 34 tightens the diameter control rope 28 and the main diameter adjustment spring 26 so that the main port completely fits the die head 44.

[0070] Hot and cold dual-mode curing:

[0071] The refrigeration module 43 is started, and the die head 44 is cooled to solidify the rosin 263, locking the current diameters of the main and auxiliary ports, and the dividing strips 27 and the plastic sheet 261 ensure smooth deformation.

[0072] Exit of die head 44 and rotation of turntable:

[0073] The lift 41 lifts the mold head 44, and the automatic turntable 12 drives the main and auxiliary molds with adjusted diameters into the filling station, and the next set of molds enters the diameter adjustment station, and the operation is cyclic.

[0074] Rosin 263 serves only as a shaping medium: its molten state merely provides a "resistance-free environment" for the elastic deformation of the inner wall. The solidification process "locks in the result" after mechanical bonding. The freezing and melting points of Rosin 263 remain constant, and the heating and cooling times can be controlled by system preset times.

[0075] The phase change, melting or solidification of the rosin 263 is completely controlled by the hot and cold modules of the die head 44, which is synchronized with the mechanical action of "die head 44 insertion → rosin 263 melting" → "lamination → cooling and solidification".

[0076] Rosin 263 is used as a shaping medium and is filled in the closed cavity of the main diameter-adjusting spring 26 . The storage capsule 262 and the plastic sheet 261 form a sealing structure.

[0077] No direct contact with the die head 44: the plastic sheet 261 is located on the inner wall of the main diameter-adjusting spring 26, isolating the rosin 263 from the capsule.

[0078] The rosin 263 solidifies to provide "rigid support" to lock the caliber, while the main diameter-adjusting spring 26 is not a real spring, but a spring shape. The plastic sheet 261 only solves the problem of surface flatness during deformation, and the rosin 263 solidification is the core of providing ultimate rigid support. Without the rosin 263, the spring body's own elasticity and the plastic sheet 261 alone cannot resist external force interference during the filling process.

[0079] Rosin 263 melts at high temperature and becomes plastic:

[0080] When the die head 44 is heated, the rosin 263 melts into liquid. At this time, the rosin 263 medium inside the main diameter-adjusting spring 26 loses its rigidity, and the main diameter-adjusting spring 26 can be freely elastically deformed under the tension of the diameter-controlling rope 28 .

[0081] Low temperature curing, rigid state:

[0082] After the mold head 44 is cooled, the rosin 263 quickly solidifies into a solid state, and its hardness is significantly improved, approaching the rigidity of rock. At this time, the rosin 263 fills the internal cavity of the main diameter adjustment spring 26 to form an incompressible rigid support body, completely locking the deformed diameter of the main diameter adjustment spring 26.

[0083] If rosin 263 is not solidified, the spring body will remain elastic after the spring is adjusted. When the capsule is inserted or filled with powder, external force may cause the spring body to rebound or move, resulting in caliber deviation.

[0084] If rosin 263 is used, the solidified rosin 263 fills the gap of the main diameter-adjusting spring 26 into a continuous rigid body, turning the entire structure into an integral hard cavity similar to a stainless steel mold. At this time: external force cannot compress the rosin 263 medium; the plastic sheet 261 is pressed tightly by the rosin 263 and cannot collapse inward; the tension of the diameter-control rope 28 is borne by the solidified rosin 263, and there is no need for continuous tension.

[0085] The rigid curing of rosin 263 ensures zero rebound of the caliber size in subsequent processes, and the tolerance is controlled to the micron level. Compared with the ±0.1mm tolerance of traditional metal molds, the accuracy is improved by one order of magnitude.

[0086] Through phase change switching, Rosin 263 achieves the unification of the two contradictory characteristics of "elastic deformation" and "rigid setting" on the same component, which is impossible to achieve with mechanical structure alone.

[0087] The above describes the embodiments of the present invention, but the present invention is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. An automatic capsule filling machine for granular medicines, characterized in that: include: A filling machine body (11), wherein the filling machine body (11) is provided with an auxiliary adjustment component and multiple groups of capsule diameter adjustment mechanisms (2); The capsule diameter adjustment mechanism (2) includes a main mold (21) and a diameter adjustment component and a pressure component matched therewith. The powder filling area of ​​the main mold (21) is arrayed with a plurality of diameter adjustment components. Each diameter adjustment component includes a capsule main opening (23). A main diameter adjustment spring (26) is coaxially embedded in the capsule main opening (23). The main diameter adjustment spring (26) is a spring-shaped structure and is filled with rosin (263) to form a shaping medium. The upper and lower end points of the main diameter adjustment spring are respectively connected to the pressure component through a diameter control rope (28). The auxiliary adjustment component is arranged on the rotation path of the main mold (21), and includes a replaceable mold head (44). The mold head (44) has a hot and cold dual-mode conduction function. When performing the diameter adjustment operation, the mold head (44) generates heat to melt the rosin (263), and the mold head (44) is gradually inserted into the capsule main opening (23) and applies axial pressure to the pressure component. The pressure component generates symmetrical tension on both ends of the main diameter adjustment spring (26) through the diameter control rope (28), forcing the inner wall of the capsule main opening (23) to elastically deform and completely fit the outer diameter of the mold head (44). Finally, the mold head (44) is cooled to solidify the rosin (263) to achieve precise determination of the capsule diameter.

2. The automatic capsule filling machine for granular medicines according to claim 1, characterized in that: An automatic turntable (12) with a driving rotation function is provided at the center of the working area of ​​the filling machine body (11), and a plurality of main molds (21) are fixed on the automatic turntable (12) at equal distances. The automatic turntable (12) drives the plurality of main molds (21) to pass through different working process areas in sequence, and includes a working area of ​​an auxiliary adjustment component to adjust the diameter of the capsule main opening (23) of the main mold (21).

3. The automatic capsule filling machine for granular medicine according to claim 1, characterized in that: The auxiliary adjustment component also includes an elevator (41), and an electric heating module (42) and a refrigeration module (43) are fixedly installed on the elevator head of the elevator (41), and a plurality of mold heads (44) are installed on the lower wall of the elevator head of the elevator (41) and have a detachable function. The plurality of mold heads (44) are aligned with the center of the capsule main opening (23).

4. The automatic capsule filling machine for granular medicines according to claim 1, characterized in that: The main diameter-adjusting spring (26) is composed of three parts: a plastic sheet (261), a storage capsule (262), and rosin (263). The storage capsule (262) is fixedly connected to the plastic sheet (261), so that the interior of the main diameter-adjusting spring (26) is hollow and is used to be filled with rosin (263). The plastic sheet (261) is located on the inner ring wall of the main diameter-adjusting spring (26).

5. The automatic capsule filling machine for granular medicines according to claim 4, characterized in that: A plurality of dividing strips (27) are fixedly provided on one side of the capsule main opening (23) close to the plastic sheet (261), and the plurality of dividing strips (27) are longitudinally oriented, and their length dimension is the same as the internal height dimension of the capsule main opening (23).

6. The automatic capsule filling machine for granular medicine according to claim 1, characterized in that: The pressure-bearing component includes a pressure-bearing head (31) that passes through the main mold (21), a pressure-limiting column (35) is slidably provided at the inner center position of the pressure-bearing head (31), a spring 1 (36) is fixedly provided above the pressure-limiting column (35), a spring 2 (37) is fixedly provided inside the pressure-limiting column (35), the pressure-bearing value of the spring 2 (37) is greater than the pressure-bearing value of the spring 1 (36), and the pressure-bearing head (31) and the pressure-limiting column (35) are both slidably connected to the main mold (21).

7. The automatic capsule filling machine for granular medicine according to claim 6, characterized in that: A main control wire (32) is fixedly provided on one side of the pressure head (31), and the main control wire (32) passes through the main mold (21) and is movably connected. A support wire 1 (33) and a support wire 2 (34) are fixedly provided on one end of the main control wire (32) away from the pressure head (31), and the support wire 2 (34) is fixedly connected to a plurality of diameter control ropes (28).

8. The automatic capsule filling machine for granular medicine according to claim 7, characterized in that: A secondary mold (22) is provided above the powder filling area of ​​the main mold (21). The internal array of the secondary mold (22) has a plurality of capsule secondary openings (24). A secondary diameter-adjusting spring (25) is provided inside the capsule secondary openings (24). The structure of the secondary diameter-adjusting spring (25) is the same as that of the main diameter-adjusting spring (26).

9. The automatic capsule filling machine for granular medicine according to claim 8, characterized in that: Two tension spring blocks (55) are slidingly provided on the side wall of the auxiliary mold (22), and a hole groove (56) is opened at the center position of the tension spring block (55). The two tension spring blocks (55) are both slidably connected to the auxiliary mold (22), and the two tension spring blocks (55) are respectively connected to the auxiliary diameter-adjusting spring (25) through silk threads.

10. The automatic capsule filling machine for granular medicines according to claim 9, characterized in that: A slide groove (54) is provided on one side of the main mold (21) close to the tension spring block (55), and two sliders (51) are provided inside the slide groove (54), and the two sliders (51) correspond one to one with the two tension spring blocks (55). A telescopic column (52) is provided inside the slider (51), and the telescopic column (52) is fixedly provided with an inner end point, and the telescopic column (52) is fixedly connected to the support wire (33).

Images