CN213733587U - Large-size grain pressing die - Google Patents
Large-size grain pressing die Download PDFInfo
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- CN213733587U CN213733587U CN202021170667.3U CN202021170667U CN213733587U CN 213733587 U CN213733587 U CN 213733587U CN 202021170667 U CN202021170667 U CN 202021170667U CN 213733587 U CN213733587 U CN 213733587U
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Abstract
The utility model discloses a large-size grain pressing die, which comprises a filter plate, a die holder, a needle frame and a die needle; the inner cavity of the die holder is provided with a pressing channel, the upper section of the pressing channel is a contraction section, and the lower section of the pressing channel is a straight line section communicated with the lowest end of the contraction section; a needle frame mounting groove is formed above the shrinkage section of the die holder medicine pressing channel; the needle frame comprises a support ring positioned on the outer ring and a mold needle supporting part fixed in the middle of the support ring through a connecting rib, wherein the upper section of the outer wall of the mold needle supporting part is an expansion conical section, and the lower section of the outer wall of the mold needle supporting part is a convergence conical section; the needle frame is arranged in a needle frame mounting groove of the die holder medicine pressing channel, and a filter plate is arranged above the needle frame; the rear end of the mould needle is fixed with the mould needle supporting part of the needle frame, and the front end of the mould needle extends into the contraction section and the straight line section of the mould seat medicine pressing channel. The utility model discloses a powder column embossing mold utensil realizes the press forming of jumbo size powder column, and the powder column appearance quality after the suppression is good to can satisfy trajectory performance index requirement.
Description
Technical Field
The utility model relates to a jumbo size grain embossing mold utensil belongs to mould design field.
Background
The traditional powder column pressing mould is shown in figure 1 and comprises a mould base 1, a contraction plate 2, a support plate 3, a backing plate 4, a filter plate 5, a mould needle, a copper sleeve and the like. The whole pressing process is that the medicine material flows through the filter plate, the support plate and the contraction plate and then enters the tapered shaping body (the mold needle and the copper sleeve), and then the medicine is formed and discharged, and the structure medicine column pressing mold is only suitable for pressing small-size medicine columns. With the requirement of equipment development, the requirement of trial production of larger-size grains by extrusion molding process (
Above), for the extrusion molding process of the large-size explosive column by the traditional compression mode of the supporting plate and the contraction plate of the explosive column pressing die, the problems of narrow extrusion space of the explosive material, insufficient explosive flow, slow flow rate, bubbles, roughness and even bamboo joints on the surface of the explosive column, reduced mechanical property, unqualified ballistic indexes and the like exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems of insufficient medicine flow, slow flow speed, poor surface quality of the medicine column surface and the like of the traditional medicine column pressing die when pressing the medicine, and providing a large-size medicine column pressing die.
The utility model aims at realizing through the following technical scheme:
the utility model relates to a large-size grain pressing die, which comprises a filter plate, a die holder, a needle frame and a die needle;
the inner cavity of the die holder is provided with a pressing channel, the upper section of the pressing channel is a contraction section, the area ratio of the uppermost end to the lowermost end of the contraction section is matched with the compression ratio of pressing, the lower section of the pressing channel is a straight line section communicated with the lowermost end of the contraction section, and the diameter of the straight line section is matched with the outer diameter of a to-be-pressed powder column; a needle frame mounting groove is formed above the shrinkage section of the die holder medicine pressing channel;
the mould needle is a cylindrical structure with the diameter matched with the diameter of the inner hole of the grain to be pressed;
the needle frame comprises a support ring positioned on the outer ring and a mold needle supporting part fixed in the middle of the support ring through a connecting rib, the upper section of the outer wall of the mold needle supporting part is an expanding conical section, and the lower section of the outer wall of the mold needle supporting part is a converging conical section connected with the expanding conical section;
the filter plate is a circular plate with small holes on the plate surface;
the needle frame is arranged in a needle frame mounting groove of the die holder medicine pressing channel, and a filter plate is arranged above the needle frame; the rear end of the mould needle is fixed with the mould needle supporting part of the needle frame, and the front end of the mould needle extends into the contraction section and the straight line section of the mould seat medicine pressing channel.
Advantageous effects
The utility model discloses a powder column embossing mold utensil realizes the press forming of jumbo size powder column, and the powder column appearance quality after the suppression is good to can satisfy trajectory performance index requirement.
Drawings
FIG. 1 is a schematic structural view of a conventional charge pressing mold;
FIG. 2 is a schematic structural view of the powder column pressing mold of the present invention;
in the figure, 1-bottom die, 2-shrinkage plate, 3-support plate, 4-backing plate, 5-filter plate, 6-die holder, 7-needle holder and 8-die needle.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
Examples
As shown in fig. 2, the utility model discloses a large-size grain pressing die, which comprises a filter plate 5, a die holder 6, a needle frame 7 and a die needle 8;
a medicine pressing channel is formed in an inner cavity of the die holder 6, the upper section of the medicine pressing channel is a contraction section, the area ratio of the uppermost end to the lowermost end of the contraction section is matched with the compression ratio of medicine pressing, the lower section of the medicine pressing channel is a straight line section communicated with the lowermost end of the contraction section, and the diameter of the straight line section is matched with the outer diameter of a medicine column to be pressed; a needle frame mounting groove is arranged above the shrinkage section of the medicine pressing channel of the die holder 6;
the mould needle 8 is a cylinder structure with the diameter matched with the diameter of the inner hole of the grain to be pressed;
the needle frame 7 comprises a support ring positioned on the outer ring and a mold needle supporting part fixed in the middle of the support ring through a connecting rib, the upper section of the outer wall of the mold needle supporting part is an expanding conical section, and the lower section of the outer wall of the mold needle supporting part is a converging conical section connected with the expanding conical section;
the filter plate 5 is a circular plate with small holes on the plate surface;
the needle frame 7 is arranged in a needle frame mounting groove of the medicine pressing channel of the die holder 6, and a filter plate 5 is arranged above the needle frame 7; the rear end of the mould needle 8 is fixed with the mould needle supporting part of the needle frame 7, and the front end of the mould needle 8 extends into the contraction section and the straight line section of the medicine pressing channel of the mould base 6.
Claims (1)
1. A large-size grain pressing die is characterized in that: comprises a filter plate, a die holder, a needle frame and a die needle;
the inner cavity of the die holder is provided with a pressing channel, the upper section of the pressing channel is a contraction section, the area ratio of the uppermost end to the lowermost end of the contraction section is matched with the compression ratio of pressing, the lower section of the pressing channel is a straight line section communicated with the lowermost end of the contraction section, and the diameter of the straight line section is matched with the outer diameter of a to-be-pressed powder column; a needle frame mounting groove is formed above the shrinkage section of the die holder medicine pressing channel;
the mould needle is a cylindrical structure with the diameter matched with the diameter of the inner hole of the grain to be pressed;
the needle frame comprises a support ring positioned on the outer ring and a mold needle supporting part fixed in the middle of the support ring through a connecting rib, the upper section of the outer wall of the mold needle supporting part is an expanding conical section, and the lower section of the outer wall of the mold needle supporting part is a converging conical section connected with the expanding conical section;
the filter plate is a circular plate with small holes on the plate surface;
the needle frame is arranged in a needle frame mounting groove of the die holder medicine pressing channel, and a filter plate is arranged above the needle frame; the rear end of the mould needle is fixed with the mould needle supporting part of the needle frame, and the front end of the mould needle extends into the contraction section and the straight line section of the mould seat medicine pressing channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170667.3U CN213733587U (en) | 2020-06-22 | 2020-06-22 | Large-size grain pressing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170667.3U CN213733587U (en) | 2020-06-22 | 2020-06-22 | Large-size grain pressing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213733587U true CN213733587U (en) | 2021-07-20 |
Family
ID=76815065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021170667.3U Active CN213733587U (en) | 2020-06-22 | 2020-06-22 | Large-size grain pressing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213733587U (en) |
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2020
- 2020-06-22 CN CN202021170667.3U patent/CN213733587U/en active Active
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