CN116924861A - Auxiliary device for pressing medicine for screw press forming die - Google Patents
Auxiliary device for pressing medicine for screw press forming die Download PDFInfo
- Publication number
- CN116924861A CN116924861A CN202310859014.8A CN202310859014A CN116924861A CN 116924861 A CN116924861 A CN 116924861A CN 202310859014 A CN202310859014 A CN 202310859014A CN 116924861 A CN116924861 A CN 116924861A
- Authority
- CN
- China
- Prior art keywords
- positioning ring
- ring
- shaped
- axial
- baffle ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003814 drug Substances 0.000 title claims abstract description 28
- 238000007493 shaping process Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 7
- 239000004449 solid propellant Substances 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 description 4
- 229940079593 drug Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229940126589 solid medicine Drugs 0.000 description 2
- 238000012377 drug delivery Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0075—Shaping the mixture by extrusion
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
The invention discloses a medicine pressing auxiliary device for a screw pressing forming die, which comprises a positioning ring fixed at the joint of a front cone and a rear cone of an inner cavity of the die, a center baffle ring arranged at the inner side of the positioning ring, and a connecting rib for connecting the positioning ring and the center baffle ring; the outer side of the center baffle ring is a cylindrical surface with two axial ends flush with the end surfaces of the two ends of the positioning ring, the inner side of the center baffle ring is a round table-shaped through hole with a small front end and a large rear end, the two ends of the round table-shaped through hole are respectively connected with the two ends of the cylindrical surface through conical surfaces, and the taper of the rear conical surface is larger than that of the front conical surface; the connecting ribs are of sheet-shaped structures with the axial width consistent with that of the positioning ring, the axial section of each connecting rib is of a zither-shaped structure with the thick middle part and the thin two ends, and the thickest axial part of each connecting rib is close to the inlet end of the die. The auxiliary device for pressing the medicine improves the consistency of the molding quality of large-diameter solid propellant grains.
Description
Technical Field
The invention relates to a drug pressing auxiliary device for a screw press forming die, and belongs to the field of die design.
Background
Screw extrusion forming is one of the important forming processes of solid propellant at home and abroad at present. The structure of the screw extruder mainly comprises a screw, a machine barrel and a die, wherein in the screw extrusion molding process, after the medicine is added into the screw extruder from a hopper, the medicine is snapped by the threads of the rotating screw to forcedly push the medicine to the machine head direction, and then the medicine is extruded into medicine grains with certain density and preset size through the die. The forming die is taken as an important component of the screw extrusion equipment and plays a vital role in forming the solid propellant. The traditional screw forming die is composed of a front cone, a rear cone and a forming body which are sequentially connected from back to front; in order to improve the molding quality of large-diameter solid grains, a mold needle and a needle frame for fixing the mold needle are arranged in a mold cavity; when the medicine is pressed, the medicine in the inner cavity of the front cone of the mould flows into the rear cone through the needle frame, and is axially cut and split into a plurality of strands by the connecting ribs of the needle frame and then enters the rear cone of the mould, the flowing speed of the medicine is gradually accelerated due to the gradual diameter reduction of the rear cone, the speed of each strand of medicine in the same section is higher than that of the mould wall, and when the medicine flows into the forming body, the speed gradient is obviously increased due to the inlet effect, the flowing speed of each strand of medicine is difficult to control, the forming quality consistency of the solid medicine column after extrusion forming is easy to be poor, and the product quality is difficult to ensure.
Disclosure of Invention
The invention aims to solve the problem that the consistency of molding quality is poor when a traditional screw molding die is used for pressing a large-diameter solid propellant product, and provides a drug pressing auxiliary device for the screw molding die.
The invention aims at realizing the following technical scheme:
the invention relates to a medicine pressing auxiliary device for a screw pressing forming die, which comprises a positioning ring fixed at the joint of a front cone and a rear cone of an inner cavity of the die, a center baffle ring arranged at the inner side of the positioning ring, and a connecting rib for connecting the positioning ring and the center baffle ring;
the outer side of the center baffle ring is a cylindrical surface with two axial ends flush with end surfaces of two ends of the positioning ring, the inner side of the center baffle ring is a circular truncated cone-shaped through hole with a small front end and a large rear end, the taper ratio of the circular truncated cone-shaped through hole is 1:22-1:11, the length of the circular truncated cone-shaped through hole is 1.5-2 times of the length of the cylindrical surface, the two ends of the circular truncated cone-shaped through hole are respectively connected with the two ends of the cylindrical surface through conical surfaces, and the taper of the rear conical surface is larger than that of the front conical surface;
the connecting ribs are of sheet-shaped structures with the axial width consistent with that of the positioning ring, the axial section of each connecting rib is of a zither-shaped structure with the thick middle part and the thin two ends, and the thickest axial part of each connecting rib is close to the inlet end of the die.
A dividing ring fixed in the middle of the connecting rib is further arranged between the positioning ring and the central baffle ring, and the axial width and the axial section of the dividing ring are consistent with those of the connecting rib.
Advantageous effects
According to the auxiliary device for pressing the medicine, disclosed by the invention, through the design of the central conical hole, the flow speed gradient of the medicine in the rear cone is reduced, the flow speed of each medicine is balanced, and the consistency of the molding quality of the large-diameter solid propellant grains is improved, so that the molding quality of a product is improved.
Drawings
FIG. 1 is a schematic view of a drug delivery auxiliary device according to the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a B-B cross-sectional view of FIG. 1;
in the figure, a 1-positioning ring; 2-split ring; 3-connecting ribs; 4-center baffle ring.
Detailed Description
The present invention will be further described with reference to the drawings and examples.
Examples
As shown in fig. 1, the auxiliary device for pressing the medicine for the screw press forming die comprises a positioning ring 1 fixed at the joint of a front cone and a rear cone of an inner cavity of the die, a center baffle ring 4 arranged at the inner side of the positioning ring 1, and a connecting rib 3 for connecting the positioning ring 1 and the center baffle ring 4;
as shown in fig. 3, the outer side of the center baffle ring 4 is a cylindrical surface with two axial ends flush with the end surfaces of the two ends of the positioning ring 1, the inner side of the center baffle ring 4 is a circular truncated cone-shaped through hole with a small front end and a large rear end, the taper ratio of the circular truncated cone-shaped through hole is 1:22-1:11, the length of the circular truncated cone-shaped through hole is 1.5-2 times of the length of the cylindrical surface, the two ends of the circular truncated cone-shaped through hole are respectively connected with the two ends of the cylindrical surface through conical surfaces, and the taper of the rear conical surface is larger than that of the front conical surface;
as shown in fig. 2, the connecting rib 3 has a sheet structure with an axial width consistent with that of the positioning ring 1, the axial section of the connecting rib 3 has a zither structure with a thick middle part and thin two ends, and the thickest axial part of the connecting rib 3 is close to the inlet end of the die.
A dividing ring 2 fixed in the middle of the connecting rib 3 is further arranged between the positioning ring 1 and the center baffle ring 4, and the axial width and the axial section of the dividing ring 2 are consistent with those of the connecting rib 3.
Taking solid grains with the outer diameter phi of 100mm as an example, a mould provided with the auxiliary device for pressing the medicine of the embodiment and a mould provided with a conventional mould needle are adopted for pressing respectively.
By incorporating the apparatus of the embodiment of the auxiliary device for pressing the medicineThe density of the molded grain is 1.69g/cm near the center 3 Near the outer wall 1.69g/cm 3 . The compressive strength at normal temperature is 30MPa.
The density of the formed grain is 1.67g/cm near the center by adopting a conventional mould with a mould needle 3 1.68g/cm near the outer wall 3 . The compressive strength at normal temperature is 22MPa.
From the experimental test results: when the mould provided with the auxiliary device for pressing the medicine is used for preparing the solid medicine column, the medicine column has good compactness and excellent comprehensive performance, and the quality consistency of the center position and the outer wall position of the medicine column is obviously improved.
Claims (2)
1. A kind of spiral shell presses the shaping mould to use and presses the auxiliary device of medicine, characterized by: the device comprises a positioning ring fixed at the joint of a front cone and a rear cone of an inner cavity of a die, a center baffle ring arranged at the inner side of the positioning ring, and connecting ribs for connecting the positioning ring and the center baffle ring;
the outer side of the center baffle ring is a cylindrical surface with two axial ends flush with end surfaces of two ends of the positioning ring, the inner side of the center baffle ring is a circular truncated cone-shaped through hole with a small front end and a large rear end, the taper ratio of the circular truncated cone-shaped through hole is 1:22-1:11, the length of the circular truncated cone-shaped through hole is 1.5-2 times of the length of the cylindrical surface, the two ends of the circular truncated cone-shaped through hole are respectively connected with the two ends of the cylindrical surface through conical surfaces, and the taper of the rear conical surface is larger than that of the front conical surface;
the connecting ribs are of sheet-shaped structures with the axial width consistent with that of the positioning ring, the axial section of each connecting rib is of a zither-shaped structure with the thick middle part and the thin two ends, and the thickest axial part of each connecting rib is close to the inlet end of the die.
2. The auxiliary device for pressing medicine for screw press forming die as defined in claim 1, wherein: a dividing ring fixed in the middle of the connecting rib is further arranged between the positioning ring and the central baffle ring, and the axial width and the axial section of the dividing ring are consistent with those of the connecting rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310859014.8A CN116924861A (en) | 2023-07-13 | 2023-07-13 | Auxiliary device for pressing medicine for screw press forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310859014.8A CN116924861A (en) | 2023-07-13 | 2023-07-13 | Auxiliary device for pressing medicine for screw press forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116924861A true CN116924861A (en) | 2023-10-24 |
Family
ID=88388899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310859014.8A Pending CN116924861A (en) | 2023-07-13 | 2023-07-13 | Auxiliary device for pressing medicine for screw press forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116924861A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008155443A (en) * | 2006-12-22 | 2008-07-10 | Kyocera Corp | Screw extruder |
| KR20090098385A (en) * | 2008-03-14 | 2009-09-17 | 주식회사 현대인더스트리 | Dies and extruder having dies |
| WO2014067391A1 (en) * | 2012-11-05 | 2014-05-08 | Wang Jun | Induced hollow screw driving apparatus |
| CN204385093U (en) * | 2014-12-23 | 2015-06-10 | 宜宾北方川安化工有限公司 | Improve the Novel tooling die of civilian double-basis solid column density |
| CN206140986U (en) * | 2016-10-18 | 2017-05-03 | 泸州北方化学工业有限公司 | Casement shunt during solid powder column shaping is used |
| KR20180093641A (en) * | 2017-02-14 | 2018-08-22 | 주식회사 동방이엔지 | Extruder of a plastic pipe |
| CN110041153A (en) * | 2019-03-22 | 2019-07-23 | 山西北方兴安化学工业有限公司 | A kind of double layered tubular combination propellants powder column spiral shell pressure coating mould |
| WO2019184403A1 (en) * | 2018-03-30 | 2019-10-03 | 四川大学 | Rotating extrusion rheometer and rheology measurement method capable of simultaneously measuring polymer pressure/shearing rheology |
| CN111825927A (en) * | 2020-07-22 | 2020-10-27 | 河南晶品新材料科技有限公司 | Terahertz antibacterial, mildew-proof, odor-removing and fresh-keeping plastic master batch and preparation method thereof |
| CN213035249U (en) * | 2020-06-12 | 2021-04-23 | 四川鑫电电缆有限公司 | Multi-head extrusion molding nose bridge batten die |
-
2023
- 2023-07-13 CN CN202310859014.8A patent/CN116924861A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008155443A (en) * | 2006-12-22 | 2008-07-10 | Kyocera Corp | Screw extruder |
| KR20090098385A (en) * | 2008-03-14 | 2009-09-17 | 주식회사 현대인더스트리 | Dies and extruder having dies |
| WO2014067391A1 (en) * | 2012-11-05 | 2014-05-08 | Wang Jun | Induced hollow screw driving apparatus |
| CN204385093U (en) * | 2014-12-23 | 2015-06-10 | 宜宾北方川安化工有限公司 | Improve the Novel tooling die of civilian double-basis solid column density |
| CN206140986U (en) * | 2016-10-18 | 2017-05-03 | 泸州北方化学工业有限公司 | Casement shunt during solid powder column shaping is used |
| KR20180093641A (en) * | 2017-02-14 | 2018-08-22 | 주식회사 동방이엔지 | Extruder of a plastic pipe |
| WO2019184403A1 (en) * | 2018-03-30 | 2019-10-03 | 四川大学 | Rotating extrusion rheometer and rheology measurement method capable of simultaneously measuring polymer pressure/shearing rheology |
| CN110041153A (en) * | 2019-03-22 | 2019-07-23 | 山西北方兴安化学工业有限公司 | A kind of double layered tubular combination propellants powder column spiral shell pressure coating mould |
| CN213035249U (en) * | 2020-06-12 | 2021-04-23 | 四川鑫电电缆有限公司 | Multi-head extrusion molding nose bridge batten die |
| CN111825927A (en) * | 2020-07-22 | 2020-10-27 | 河南晶品新材料科技有限公司 | Terahertz antibacterial, mildew-proof, odor-removing and fresh-keeping plastic master batch and preparation method thereof |
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