阅读说明：本技术 一种药粉压片机用防沾附式冲头机构 (Anti-sticking punch mechanism for medicinal powder tablet press ) 是由 葛秀莉 于 2021-06-28 设计创作，主要内容包括：本发明涉及生物制药技术领域,且公开了一种药粉压片机用防沾附式冲头机构,包括模具台,所述模具台的内部固定安装有气腔壳,所述气腔壳的内侧顶部固定安装有第一挡环,所述气腔壳的内腔活动安装有活塞环。本发明通过活动压套的镶层活动结构,当活动压套顶层底端的四层结构被压出,其内腔形成负压腔,对片坯造成吸附,防止片坯粘附在上冲头的底端,利用活动压套作为下冲头与上冲头相互配合,对粉料进行冲击压制,保证冲头机构的压力平衡一致,避免压力不足,且具有节能环保的作用,通过支撑弹簧,使活动压套内腔中负压倒吸的空气被排出,排出气流将内壁上所沾附的粉料颗粒吹拂而出,避免其堆积在活动压套与压具壳的内壁之间的缝隙内。(The invention relates to the technical field of biological pharmacy, and discloses an anti-adhesion punch mechanism for a medicinal powder tablet press. According to the invention, through the layer-embedded movable structure of the movable pressing sleeve, when the four-layer structure at the bottom end of the top layer of the movable pressing sleeve is pressed out, the inner cavity of the movable pressing sleeve forms a negative pressure cavity to adsorb a sheet blank and prevent the sheet blank from being adhered to the bottom end of the upper punch, the movable pressing sleeve is used as the lower punch to be matched with the upper punch to impact and press powder, so that the pressure balance of the punch mechanism is ensured to be consistent, the pressure insufficiency is avoided, and the energy-saving and environment-friendly effects are achieved.)

1. The utility model provides a medicinal powder tablet press is with preventing being stained with attaches formula drift mechanism, includes mould platform (1), its characterized in that: an air cavity shell (2) is fixedly arranged in the die table (1), a first baffle ring (3) is fixedly arranged at the top of the inner side of the air cavity shell (2), a piston ring (4) is movably arranged in the inner cavity of the air cavity shell (2), a pressing tool shell (5) is fixedly arranged on the inner side of the piston ring (4), a second retaining ring (6) is fixedly arranged at the top of the outer side of the pressing shell (5), the two sides of the bottom of the pressing tool shell (5) are provided with air transmission ports (7), the inner cavity of the pressing tool shell (5) is movably provided with a movable pressing sleeve (8), a supporting spring (9) is fixedly arranged in the middle of the bottom end of the movable pressing sleeve (8), an upper punch (10) is movably arranged above the top end of the pressing shell (5), the bottom end outer ring of the upper punch (10) is fixedly provided with a pushing ring (11), and the top end of the upper punch (10) is fixedly provided with a hydraulic rod (12).

2. The anti-sticking punch mechanism for a tablet press of claim 1, wherein: the air cavity shell (2) is cylindrical, and a cavity formed from the bottom end of the piston ring (4) in the inner cavity of the air cavity shell (2) to the bottom end of the movable pressing sleeve (8) in the inner cavity of the pressing tool shell (5) is filled with air.

3. The anti-sticking punch mechanism for a tablet press of claim 1, wherein: the piston ring (4) is in a ring shape, the surface width of the piston ring (4) is equal to the distance from the inner side surface of the air cavity shell (2) to the outer side surface of the pressing tool shell (5), and the piston ring (4) has magnetism.

4. The anti-sticking punch mechanism for a tablet press of claim 1, wherein: the cross section of the upper punch (10) is inverted-mountain-shaped, the upper punch is cylindrical as a whole, and the diameter value of the middle cylinder of the upper punch (10) is equal to the diameter value of the inner cavity of the pressing shell (5).

5. The anti-sticking punch mechanism for a tablet press of claim 1, wherein: the overlooking shape of the movable pressing sleeve (8) is circular, the movable pressing sleeve (8) is divided into five layers, wherein the top layer is in a circular shape, the rest of the top layer is cylindrical, the upper and lower openings of the middle three layers are communicated, the upper end of the bottommost layer is open, the lower end of the bottommost layer is sealed circular, the five layers of structures of the movable pressing sleeve (8) are movably spliced with each other, and the diameter value of each layer of structure is gradually reduced.

6. The anti-sticking punch mechanism for a tablet press of claim 1, wherein: the shape of the pushing and guiding ring (11) is circular, the pushing and guiding ring (11) has magnetism, the magnetism is opposite to that of the piston ring (4), and the transverse width value of the pushing and guiding ring (11) is equal to the distance value from the inner side of the first retaining ring (3) to the outer side of the second retaining ring (6).

Technical Field

The invention relates to the technical field of biological pharmacy, in particular to an anti-adhesion punch mechanism for a medicinal powder tablet press.

Background

The tablet machine for preparing medicine powder is a machine which can place medicine granules or powder material in the die hole, then make them into tablet by means of punch head.

In the pressing process of the existing tablet press punch mechanism, the existing tablet press punch mechanism has the defects that the pressure applied by a punch is large, the formed tablet blank is easy to adhere to the punch, so that the demoulding failure is caused, the subsequent powder tabletting manufacture of the next time is hindered, and the difficulty is caused to the punching work of the tablet press.

Disclosure of Invention

Aiming at the defects of the prior powder tablet press in the use process, the invention provides the anti-adhesion punch mechanism for the powder tablet press, which has the advantages of preventing the formed tablet blank from adhering to the surface of the punch to cause demoulding failure, effectively preventing powder from being detained and infiltrated, ensuring sufficient pressure of the punch and solving the technical problems in the prior art.

The invention provides the following technical scheme: the utility model provides a powder preforming machine is with preventing being stained with attaches formula drift mechanism, includes the mould platform, the inside fixed mounting of mould platform has the air cavity shell, the inboard top fixed mounting of air cavity shell has first fender ring, the inner chamber movable mounting of air cavity shell has the piston ring, the inboard fixed mounting of piston ring has the tamp shell, the outside top fixed mounting of tamp shell has the second to keep off the ring, the gas transmission mouth has been seted up to the bottom both sides of tamp shell, the inner chamber movable mounting of tamp shell has the activity to press the cover, the bottom middle part fixed mounting of activity pressure cover has supporting spring, the top movable mounting of tamp shell has the top punch, the bottom outer lane fixed mounting of top punch has the ring of bulldozing, the top fixed mounting of top punch has the hydraulic stem.

Preferably, the air cavity shell is cylindrical, and a cavity formed from the bottom end of the piston ring in the inner cavity of the air cavity shell to the bottom end of the movable pressing sleeve in the inner cavity of the pressing tool shell is filled with air.

Preferably, the piston ring is in the shape of a circular ring, the surface width of the piston ring is equal to the distance from the inner side surface of the air cavity shell to the outer side surface of the pressing tool shell, and the piston ring has magnetism.

Preferably, the cross section of the upper punch is in an inverted-mountain shape, the upper punch is cylindrical as a whole, and the diameter value of the middle cylinder of the upper punch is equal to that of the inner cavity of the pressing tool shell.

Preferably, the overlooking shape of the movable pressing sleeve is circular, the movable pressing sleeve is divided into five layers, wherein the top layer is in a circular shape, the rest of the top layer is cylindrical, the upper opening and the lower opening of the middle three layers are communicated, the upper end of the bottommost layer is open, the lower end of the bottommost layer is sealed circular, the five layers of structures of the movable pressing sleeve are movably spliced with each other, and the diameter value of each layer of structure is reduced progressively.

Preferably, the shape of the thrust ring is a circular ring shape, the thrust ring has magnetism, the magnetism is opposite to that of the piston ring, and the transverse width of the thrust ring is equal to the distance from the inner side of the first retaining ring to the outer side of the second retaining ring.

The invention has the following beneficial effects:

1. according to the invention, through the special embedded layer movable structure of the movable pressing sleeve, when the piston ring is driven to move upwards, gas flows to the inner cavity of the air cavity shell through the gas transmission port, and the pressure difference is generated at the upper end and the lower end of the movable pressing sleeve according to the principle that the flow rate is larger and the pressure is smaller, at the moment, the four-layer structure at the bottom end of the top layer of the movable pressing sleeve is sucked by the negative pressure of the gas flow and moves downwards to be sequentially pressed out, and as the clearance between the formed sheet blank and the movable pressing sleeve is increased, the inner cavity of the movable pressing sleeve forms a negative pressure cavity according to the principle that the volume is larger and the pressure is smaller, the formed sheet blank is adsorbed, so that the formed sheet blank is prevented from being adhered to the bottom end of an upper punch, the demoulding failure is caused, the subsequent powder tabletting manufacture is prevented, and the stamping work of a tabletting machine is difficult.

2. The movable pressing sleeve is used as a bottom plate to bear powder, when the hydraulic rod drives the upper punch to move downwards, when powder is punched, the pushing ring pushes the piston ring to move downwards, so that gas at the bottom end of the piston ring flows into an inner cavity of the pressing tool shell through the gas transmission port, the gas flow pushes the bottom end of the movable pressing sleeve, the movable pressing sleeve is pushed to move upwards due to flowing pushing and pressing of the gas flow, at the moment, the movable pressing sleeve is used as a lower punch and an upper punch to be matched with each other to perform impact pressing on the powder, the degree of the downward pressing of the upper punch is in direct proportion to the pressure applied to the movable pressing sleeve by the upward flowing of the gas, and therefore the pressures of the upper end and the lower end of the powder can reach a direct proportion, so that the pressure balance and consistency of the punch mechanisms are ensured, the pressure insufficiency is avoided, the use of a plurality of hydraulic mechanisms is saved, and the energy-saving and environment-friendly effects are achieved.

3. According to the invention, through the spring mechanism, when the piston ring is pushed and guided to move and rise to the bottom ends of the first retaining ring and the second retaining ring, the supporting spring is extruded to a limit state, at the moment, the rebound force of the supporting spring is greater than the pressure applied to the top end of the movable pressing sleeve, the supporting spring rebounds upwards and extrudes the bottom end of the movable pressing sleeve upwards, at the moment, air sucked by negative pressure in the inner cavity of the movable pressing sleeve is discharged, airflow flows outwards from the edge of the inner wall of the pressing tool shell, powder particles adhered to the inner wall can be blown out, and the phenomenon that the powder particles are accumulated in a gap between the movable pressing sleeve and the inner wall of the pressing tool shell to cause mechanism jamming and influence on the manufacturing of a molded sheet blank is avoided.

Drawings

FIG. 1 is a schematic view of the structure of the present invention when powder is not poured;

FIG. 2 is a schematic view of the structure of the present invention showing the state after the powder material is poured into the structure;

FIG. 3 is a schematic view of the structure of the present invention after pressing the powder material into a slab;

FIG. 4 is a schematic view of the spring of the present invention being depressed to the limit;

FIG. 5 is a schematic top view of the movable press sleeve of the present invention;

FIG. 6 is a schematic top view of the structure of the present invention.

In the figure: 1. a mold table; 2. an air chamber housing; 3. a first retainer ring; 4. a piston ring; 5. a presser shell; 6. a second retainer ring; 7. a gas transmission port; 8. a movable pressing sleeve; 9. a support spring; 10. an upper punch; 11. a push-pull ring; 12. a hydraulic rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an anti-sticking punch mechanism for a powder tablet press comprises a die table 1, an air cavity housing 2 is fixedly installed inside the die table 1, a first baffle ring 3 is fixedly installed at the top of the inner side of the air cavity housing 2, a piston ring 4 is movably installed in the inner cavity of the air cavity housing 2, a press housing 5 is fixedly installed at the inner side of the piston ring 4, a second baffle ring 6 is fixedly installed at the top of the outer side of the press housing 5, air transmission ports 7 are formed at two sides of the bottom of the press housing 5, a movable press sleeve 8 is movably installed in the inner cavity of the press housing 5, a supporting spring 9 is fixedly installed in the middle of the bottom end of the movable press sleeve 8, after a molded tablet blank is successfully pressed, the supporting spring 9 is pressed downwards due to the fact that the bottom end of the movable press sleeve 8 is brought out by air flow, when the piston ring 4 is driven by a push ring 11 to rise to the bottom ends of the first baffle ring 3 and the second baffle ring 6, the supporting spring 9 is pressed to the limit state, at this time, the rebound force of the supporting spring 9 is greater than the pressure applied to the top end of the movable pressing sleeve 8, the supporting spring 9 rebounds upwards to extrude the bottom end of the movable pressing sleeve 8 upwards, at this time, the air sucked by the negative pressure in the inner cavity of the movable pressing sleeve 8 is discharged, the air flow flows outwards from the edge of the inner wall of the pressing tool shell 5, so that the powder particles adhered to the inner wall can be blown out to avoid accumulation in the gap between the movable pressing sleeve 8 and the inner wall of the pressing tool shell 5 to cause mechanism blockage and influence on the manufacturing of the molded sheet blank, the upper punch 10 is movably installed above the top end of the pressing tool shell 5, the outer ring at the bottom end of the upper punch 10 is fixedly installed with the pushing and guiding ring 11, and the hydraulic rod 12 is fixedly installed at the top end of the upper punch 10.

Wherein, the shape of the air cavity shell 2 is cylindrical, and a cavity formed from the bottom end of the piston ring 4 in the cavity of the air cavity shell 2 to the bottom end of the movable pressing sleeve 8 in the cavity of the pressing tool shell 5 is filled with air.

Wherein, the shape of piston ring 4 is the ring shape, and the surface width value of piston ring 4 equals the distance value of the outside surface of the inside surface of air cavity shell 2 to tamp shell 5, and piston ring 4 has magnetism.

Wherein, the overlooking shape of the movable pressing sleeve 8 is circular, the movable pressing sleeve 8 is divided into five layers, the top layer is circular, the rest is cylindrical, three layers of upper and lower openings in the middle are communicated, the upper end of the bottommost layer is open, the lower end is sealed circular, the five layers of structures of the movable pressing sleeve 8 are movably spliced with each other, the diameter value of each layer of structure is reduced progressively in sequence, through the special splicing structure of the movable pressing sleeve 8, when medicine powder materials are poured into the inner cavity of the pressing tool shell 5, the movable pressing sleeve 8 is used as a bottom plate for bearing powder materials, when a hydraulic rod 12 drives an upper punch 10 to move downwards for powder stamping, the pushing ring 11 pushes the piston ring 4 to move downwards, so that the gas at the bottom end of the piston ring gushes into the inner cavity of the pressing tool shell 5 through a gas transmission port 7, the gas flow pushes the bottom end of the movable pressing sleeve 8, the top layer of the movable pressing sleeve 8 is circular, and the diameter value is larger than the rest layers, and the rest layers are firmly pushed at the bottom end of the top layer of the top surface of the movable pressing sleeve 8, meanwhile, the movable pressing sleeve 8 is pushed to move upwards due to the flowing push of the air flow, the movable pressing sleeve 8 at the moment is used as a lower punch and an upper punch 10 to be matched with each other to impact and press the powder, the degree of the downward pressing of the upper punch 10 is in a direct proportion relation with the pressure of the upward flowing air on the movable pressing sleeve 8, so that the pressures of the upper end and the lower end of the powder can be in a direct proportion, the pressure balance of the punch mechanism is further ensured to be consistent, the pressure insufficiency is avoided, secondly, after the powder is pressed into a sheet blank, the upper punch 10 is driven by a hydraulic rod 12 to move upwards, due to the magnetic attraction of a push ring 11 and a piston ring 4, the piston ring 4 is driven to move upwards, the air flows to the inner cavity of the air cavity shell 2 through an air delivery port 7, due to the principle that the flow rate is larger, the pressure is smaller, the bottom end of the movable pressing sleeve 8 forms negative pressure, pressure difference is generated up and down, at the moment, the four-layer structure at the top end of the movable pressing sleeve 8 is reversely attracted by the negative pressure, the tablets are sequentially pulled out, and as the clearance between the formed tablets and the movable pressing sleeve 8 is increased, according to the principle that the larger the volume is, the smaller the pressure intensity is, the inner cavity of the movable pressing sleeve 8 forms a negative pressure cavity to adsorb the formed tablets, so that the formed tablets are prevented from being adhered to the bottom end of the upper punch 10 to cause demoulding failure, which hinders the subsequent powder tablet manufacturing at the next time and causes difficulty to the punching work of the tablet press.

The cross section of the upper punch 10 is inverted-mountain-shaped, the whole upper punch is cylindrical, and the diameter value of the middle cylinder of the upper punch 10 is equal to the diameter value of the inner cavity of the pressing tool shell 5.

The shape of the push-pull ring 11 is a circular ring, the push-pull ring 11 has magnetism, the magnetism is opposite to that of the piston ring 4, and the transverse width of the push-pull ring 11 is equal to the distance from the inner side of the first retaining ring 3 to the outer side of the second retaining ring 6.

The using method of the invention has the following working principle:

when the powder is not poured, the initial state of the device is as shown in a die table 1 in the attached drawing, the required powder is poured into an inner cavity of a pressure tool shell 5 through the existing feeding mechanism, after the powder is poured, as shown in an air cavity shell 2 in the attached drawing, an upper punch 10 is driven by a hydraulic rod 12 to move downwards to start powder stamping, at the moment, a pushing and guiding ring 11 adsorbs and pushes the piston ring 4 downwards, gas at the bottom end of the piston ring 4 starts to flow into the inner cavity of the pressure tool shell 5 through an air conveying port 7, the gas flow continuously pushes the bottom end of a movable pressure sleeve 8, the movable pressure sleeve 8 is pushed to move upwards, and the movable pressure sleeve 8 at the moment is used as a lower punch and is matched with the upper punch 10 to perform impact stamping on the upper end and the lower end of the powder.

When powder is pressed into a sheet blank, as shown in a first baffle ring 3 in the drawing, and when tablets are to be discharged, as shown in a piston ring 4 in the drawing, an upper punch 10 is driven by a hydraulic rod 12 to move upwards, the piston ring 4 is driven to move upwards due to the magnetic attraction of a push ring 11 and the piston ring 4, gas flows to the inner cavity of the air cavity shell 2 through an air conveying port 7, negative pressure is formed at the bottom end of a movable pressing sleeve 8, pressure difference is generated vertically, a four-layer structure at the bottom end of the top layer of the movable pressing sleeve 8 is sucked downwards by the negative pressure and is pulled out in sequence, and as the gap between a formed sheet blank and the movable pressing sleeve 8 is increased, a negative pressure cavity is formed in the inner cavity of the movable pressing sleeve 8, the formed sheet blank is adsorbed, and the formed sheet blank is prevented from being adhered to the bottom end of the upper punch 10, so that the problem of demoulding failure is caused.

When the push-pull ring 11 drives the piston ring 4 to reach the bottom ends of the first retaining ring 3 and the second retaining ring 6, the supporting spring 9 is extruded to a limit state, at this time, the rebound force of the supporting spring 9 is greater than the pressure applied to the top end of the movable pressing sleeve 8, the supporting spring 9 rebounds upwards to extrude the bottom end of the movable pressing sleeve 8 upwards, at this time, the air sucked by negative pressure in the inner cavity of the movable pressing sleeve 8 is discharged, the airflow flows outwards from the edge of the inner wall of the pressing tool shell 5, so that powder particles adhered to the inner wall can be blown out to avoid accumulating in a gap between the movable pressing sleeve 8 and the inner wall of the pressing tool shell 5 to cause mechanism blockage, and at the same time, the supporting spring 9 rebounds to reset the movable pressing sleeve 8 to the top of the inner cavity of the pressing tool shell 5, the formed sheet blank is conveyed to the top end of the mold table 1 to be scraped out by the existing discharging mechanism.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.