CN213671756U - Die-casting die capable of improving magnesium alloy forming quality - Google Patents
Die-casting die capable of improving magnesium alloy forming quality Download PDFInfo
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- CN213671756U CN213671756U CN202022360042.XU CN202022360042U CN213671756U CN 213671756 U CN213671756 U CN 213671756U CN 202022360042 U CN202022360042 U CN 202022360042U CN 213671756 U CN213671756 U CN 213671756U
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Abstract
The utility model discloses a can improve die casting die of magnesium alloy shaping quality is equipped with the pouring runner, and this pouring runner includes sprue and two at least branch runners that set up according to the direction of feed of molten metal, and the inlet of sprue is outer runner, and branch runner' S liquid outlet is interior runner, and interior runner is connected with the mould die cavity respectively, the mould die cavity includes the die cavity main part, and this die cavity main part is connected with outside bellied cylindricality chamber, highly for this cylindricality chamber with more than the twice of the biggest aperture of die cavity main part junction, along the molten metal flow direction, the sectional area of pouring runner reduces gradually, and outer runner sectional area SOuter coverCross-sectional area S of all the inner gatesInner partSum Σ SInner partSatisfies SOuter cover/ΣSInner part12-15. The utility model has the advantages that: the sectional area of the sprue is gradually reduced, the flow filling pressure of the molten metal is ensured by the proportional design of the sprue, the filling fullness is improved, and the forming defect of the isolated columnar structure is reduced.
Description
Technical Field
The utility model belongs to the technical field of die-casting, concretely relates to can improve die casting die of magnesium alloy shaping quality.
Background
The design of the cold chamber high-pressure die-casting die can consider the matching with a die-casting machine, wherein one parameter is that the positions of a material handle and a sprue spreader of the die are aligned with the position of a punch of the die-casting machine. The position of the material handle and the position of the spreader cone are injection centers. The distance from the injection center to the mold cavity, i.e., the length of the runner, the area of the runner, the change of the runner and other factors greatly influence the fluidity of the molten metal. When the length of the runner is large or the area of the runner is not changed properly, the flowing distance of the molten metal is long, the fluidity is poor due to the reduction of the temperature, the pressure of flowing filling is reduced due to the poor fluidity, the flowing speed is reduced due to the poor fluidity, and the factors can cause the incomplete filling of the molten metal in the cavity. Particularly, when the tail end of the product is provided with a high and thin columnar structure, the tail end of the columnar structure is easy to generate a cold shut, and when the length of the cold shut exceeds a certain proportion of the columnar height, the product can not meet the requirements of customers and is scrapped. Accordingly, there is a need for improved runner designs to improve die cast product quality.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a can improve die casting die of magnesium alloy shaping quality.
The technical scheme is as follows:
a die casting die capable of improving the forming quality of magnesium alloy is provided with a casting runner, the casting runner comprises a main runner and at least two branch runners which are arranged according to the feeding direction of molten metal, the liquid inlet of the main runner is an outer pouring gate, the main runner is connected with the liquid inlets of the branch runners, the liquid outlets of the branch runners are inner pouring gates, the inner pouring gates are respectively connected with a die cavity, the die cavity comprises a cavity main body, the cavity main body is connected with a cylindrical cavity which protrudes outwards, and the key is that,
the height of the cylindrical cavity is more than twice of the maximum aperture of the cylindrical cavity;
along the flowing direction of the metal liquid, the sectional area of the pouring runner is gradually reduced;
the cross section area of the outer sprue is SOuter coverAll of the sectional areas S of the ingatesInner partSum of Σ SInner part，
SOuter cover/ΣSInner part＝12～15。
By adopting the design, the flowing section of the molten metal is gradually reduced, and the proportion design of the area of the pouring gate ensures the flowing filling pressure of the molten metal, improves the filling plumpness and reduces the molding defect of the isolated columnar structure.
As the preferred technical scheme, for the same branch flow channel, the sectional area of the liquid inlet is SBranch intoThe sectional area of the inner gate is SInner part，
SBranch into/SInner part＝1.1～1.3。
By adopting the design, when the molten metal enters the mold cavity from the branch flow channel, the pressure is increased, and the filling quality is ensured.
As a preferred technical scheme, the main runner comprises a sprue and a cross runner which are sequentially arranged and connected according to the flowing direction of the metal liquid, wherein a liquid inlet of the sprue forms the outer pouring gate, a liquid outlet of the sprue is connected with a liquid inlet of the cross runner, and a downstream section of the cross runner is connected with the branch runner.
Design more than adopting, the structural design who adapts to die casting die and die casting machine.
Preferably, at least two branch runners are distributed in a downstream section of the runner along a flow direction of molten metal, and a cross-sectional area of any point of the downstream section of the runner is SHorizontal barThe cross-sectional area S of the liquid inlet of all the ingates downstream of the pointBranch intoSum of Σ SBranch into，
SHorizontal bar/ΣSBranch into≥1.1。
By adopting the design, the molten metal injection pressure in the most downstream branch flow channel is ensured.
As a preferred technical scheme, the die-casting die comprises a fixed die insert and a movable die insert which are matched, the sprue is arranged on the movable die insert, the cross gate is arranged on the opposite surfaces of the fixed die insert and the movable die insert, the cross gate is perpendicular to the sprue, the intersection point of the central line of the sprue and the cross gate is an injection center, and the distance from the injection center to the branch runner closest to the injection center is not more than 1 m.
By adopting the design, the temperature reduction range in the process that the molten metal flows into the cavity from the outer pouring gate meets the process requirement, and the cold shut defect is reduced.
Compared with the prior art, the beneficial effects of the utility model are that: the sectional area of the sprue is gradually reduced, the flow filling pressure of the molten metal is ensured by the proportional design of the sprue, the filling fullness is improved, and the forming defect of the isolated columnar structure is reduced.
Drawings
FIG. 1 is a picture of a product having cold shut defect a';
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of a casting system;
FIG. 4 is a schematic view of another perspective of the runner system;
fig. 5 is a picture of the product produced by the improved mold.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
As shown in figure 1, a product has an isolated columnar structure a, and the mold for producing the product comprises a cavity body, wherein the cavity body is connected with a cylindrical cavity which protrudes outwards, the height of the cylindrical cavity is more than twice of the maximum aperture of the cylindrical cavity, and the cylindrical cavity is used for forming the columnar structure a. When the existing mold is used for production, the cold shut defect rate of the columnar structure a is more than 30%, and a product with defects is shown in figure 1.
In order to solve the problem of the cold shut defect of the columnar structure a of the product, a die-casting die capable of improving the forming quality of the magnesium alloy is designed and comprises a fixed die insert and a movable die insert which are matched with each other as shown in figure 2. The die-casting die is provided with a pouring runner, the pouring runner comprises a main runner and at least two branch runners 3, the main runner and the at least two branch runners are arranged according to the feeding direction of molten metal, and liquid inlets of the branch runners 3 are connected with the main runner. Along the flowing direction of the metal liquid, the sectional area of the pouring runner is gradually reduced. Specifically, as shown in fig. 3 and 4, the main runner includes a sprue 1 and a runner 2 which are sequentially arranged and connected according to the molten metal flowing direction, a liquid inlet of the sprue 1 forms an outer gate 1a, a liquid outlet of the sprue 1 is connected with a liquid inlet of the runner 2, and a downstream section of the runner 2 is connected with a branch runner 3. The liquid inlet of the branch runner 3 is connected with the cross gate 2, the liquid outlet of the branch runner 3 is an inner gate 3a, and the inner gates 3a are respectively connected with a mold cavity.
The sprue 1 is arranged on the movable die insert, the cross runner 2 is arranged on the opposite surfaces of the fixed die insert and the movable die insert, the cross runner 2 is perpendicular to the sprue 1, and the intersection point of the central line of the sprue 1 and the cross runner 2 is an injection center. In order to ensure the fluidity of the molten metal and the filling fullness of the die cavity, the pouring system is improved.
The cross-sectional area S of the outer gate 1a and the cross-sectional areas S of all the inner gates 3aInner partSum Σ SInner partSatisfy the following relationship
SOuter cover/ΣSInner part＝12～15。
At least two branch runners 3 are distributed at the downstream section of the cross gate 2 along the flowing direction of molten metal, the sectional area S of any point of the downstream section of the cross gate 2 is transverse to the sectional area S of the liquid inlet of all the ingates 3a at the downstream of the pointBranch intoSum Σ SBranch intoSatisfy the following relationship
SHorizontal bar/ΣSBranch into≥1.1。
For the same branch flow channel 3, the sectional area S of the liquid inlet thereofBranch intoCross-sectional area S of the inner gate 3aInner partSatisfy the following relationship
SBranch into/SInner part＝1.1～1.3。
In this embodiment, the downstream section of the runner 2 is provided with eight branch runners 3, and the eight branch runners 3 are respectively located at two sides of the downstream section of the runner 2. In order to ensure the product quality, the distance from the injection center to the branch flow channel 3 closest to the injection center is not more than 1 m. After the die is improved, the die-casting product entity is shown in fig. 5, the columnar structure a' is filled fully, and the cold shut defect incidence rate is less than 4%.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.
Claims (5)
1. The utility model provides a can improve die casting die of magnesium alloy shaping quality is equipped with the pouring runner, and this pouring runner includes sprue and two at least branch runners (3) that set up according to the feed direction of molten metal, the inlet of sprue is outer runner (1a), the sprue is connected the inlet of branch runner (3), the liquid outlet of branch runner (3) is interior runner (3a), interior runner (3a) are connected with the mould die cavity respectively, the mould die cavity includes the die cavity main part, and this die cavity main part is connected with outside bellied cylinder chamber, its characterized in that:
the height of the cylindrical cavity is more than twice of the maximum aperture of the cylindrical cavity;
along the flowing direction of the metal liquid, the sectional area of the pouring runner is gradually reduced;
the cross section area of the outer sprue (1a) is SOuter coverAll of the ingates (3a) have a sectional area SInner partSum of Σ SInner part，
SOuter cover/ΣSInner part＝12～15。
2. The die casting mold capable of improving the molding quality of the magnesium alloy as claimed in claim 1, wherein: for the same branch flow channel (3), the cross section area of the liquid inlet is SBranch intoThe cross-sectional area of the inner gate (3a) is SInner part,
SBranch into/SInner part＝1.1～1.3。
3. A die casting mold capable of improving the molding quality of a magnesium alloy according to claim 1 or 2, characterized in that: the sprue comprises a sprue (1) and a runner (2) which are sequentially arranged and connected according to the flowing direction of molten metal, a liquid inlet of the sprue (1) forms an outer pouring gate (1a), a liquid outlet of the sprue (1) is connected with a liquid inlet of the runner (2), and a downstream section of the runner (2) is connected with the branch runner (3).
4. A die casting mold capable of improving the molding quality of magnesium alloy as claimed in claim 3, characterized in that: at least two branch runners (3) are distributed at the downstream section of the transverse runner (2) along the flowing direction of molten metal, and the sectional area of any point of the downstream section of the transverse runner (2) is SHorizontal barA cross-sectional area S of the inlet of all the ingates (3a) downstream of the pointBranch intoSum of Σ SBranch into，
SHorizontal bar/ΣSBranch into≥1.1。
5. A die casting mold capable of improving the molding quality of magnesium alloy as claimed in claim 3, characterized in that: the die casting die comprises a fixed die insert and a movable die insert which are matched, wherein the sprue (1) is arranged on the movable die insert, the cross gate (2) is arranged on the opposite surface of the fixed die insert and the movable die insert, the cross gate (2) is perpendicular to the sprue (1), the intersection point of the central line of the sprue (1) and the cross gate (2) is an injection center, and the distance from the injection center to the nearest branch runner (3) is not more than 1 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022360042.XU CN213671756U (en) | 2020-10-21 | 2020-10-21 | Die-casting die capable of improving magnesium alloy forming quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022360042.XU CN213671756U (en) | 2020-10-21 | 2020-10-21 | Die-casting die capable of improving magnesium alloy forming quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213671756U true CN213671756U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022360042.XU Active CN213671756U (en) | 2020-10-21 | 2020-10-21 | Die-casting die capable of improving magnesium alloy forming quality |
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| Country | Link |
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| CN (1) | CN213671756U (en) |
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2020
- 2020-10-21 CN CN202022360042.XU patent/CN213671756U/en active Active
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