CN209773394U - Casting system for casting with isolated hot spot - Google Patents
Casting system for casting with isolated hot spot Download PDFInfo
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- CN209773394U CN209773394U CN201920289714.7U CN201920289714U CN209773394U CN 209773394 U CN209773394 U CN 209773394U CN 201920289714 U CN201920289714 U CN 201920289714U CN 209773394 U CN209773394 U CN 209773394U
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Abstract
The utility model relates to a casting system for having isolated hot spot foundry goods, including die cavity and pouring basin, the die cavity is inside to be separated into two product die cavities by same psammitolite, the bottom of pouring basin is connected with the sprue, the bottom of sprue is connected with the feeding head; the side wall of the lower part of the feeding head is provided with two inner gates in parallel, the two inner gates are respectively connected with the side surfaces of the upper parts of two product cavities, and the positions of the inner gates are adjacent to the hot junction parts of the product cavities; two side edges of the horizontal section of any inner sprue are inclined oppositely to form a channel structure which is narrowed from a feeding head to a product cavity; the inclination angle of the side edge adjacent to the sand core is smaller than that of the other side edge; the utility model is suitable for a there is the casting of isolated hot festival foundry goods, can effectively solve the problem of foundry goods hot festival position shrinkage cavity shrinkage porosity.
Description
Technical Field
The utility model relates to a casting technical field, especially a casting system for having isolated hot spot foundry goods.
Background
in the traditional pouring process design, in order to solve the problem of shrinkage cavity and shrinkage porosity of a casting, a riser is usually arranged at a hot spot of the casting for feeding; however, when the feeding head is far away from the hot junction (an isolated hot junction exists), the area between the feeding head and the hot junction of the casting is solidified in advance, so that the feeding channel is closed in advance, the feeding head cannot supply molten iron to the hot junction, and the defect of shrinkage cavity and shrinkage porosity of the hot junction is caused.
For example, flat spheroidal iron castings (such as rail backing plates) produced by a vertical moulding line have isolated thermal junctions, and risers are difficult to directly feed.
In order to solve the problem, a mode of arranging a chilling block at a hot junction part is usually adopted, so that the hot junction part is accelerated to be solidified in advance, sequential solidification is realized, and the purpose of solving the problems of shrinkage cavity and shrinkage porosity is achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a casting system for having isolated hot festival foundry goods need not to set up the chill to a brand-new casting runner structure solves the shrinkage cavity shrinkage porosity problem at foundry goods hot festival position.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A casting system for a casting with isolated hot spots comprises a cavity and a sprue cup, wherein the cavity is internally divided into two product cavities by a same sand core, the bottom of the sprue cup is connected with a sprue, and the bottom of the sprue is connected with a feeding head; the side wall of the lower part of the feeding head is provided with two inner gates in parallel, the two inner gates are respectively connected with the side surfaces of the upper parts of two product cavities, and the positions of the inner gates are adjacent to the hot junction parts of the product cavities; two side edges of the horizontal section of any inner sprue are inclined oppositely to form a channel structure which is narrowed from a feeding head to a product cavity; and the inclination angle of the side adjacent to the sand core is smaller than that of the other side.
preferably, the number of the cavities is two, two inner gates are respectively arranged on two side walls of the lower portion of the feeding head in parallel, and the four inner gates are respectively connected with the side faces of the upper portions of the four product cavities.
Preferably, a filter screen is arranged between the straight pouring channel and the feeding head.
The utility model has the advantages as follows:
the utility model is suitable for a there is the casting of isolated hot festival foundry goods, can effectively solve the problem of foundry goods hot festival position shrinkage cavity shrinkage porosity, and the iron liquid gets into by the pouring basin during casting, gets into the feeding riser through the sprue, and the iron liquid gets into the product die cavity through the inner gate of feeding riser side, and the inner gate is located the adjacent side of hot festival of product, and the die cavity part between inner gate and the hot festival is the feeding passageway at this hot festival position promptly.
Because the two side edges of the inner gate designed by the application incline oppositely and the inclination angles are different, the flowing direction of the molten iron is changed when the molten iron flows through the inner gate (when the forward force of the molten iron passes through the inclined plane, two forces are generated, one is continuous forward force and the other is transverse force, and because the inclination angles of the two sides of the inner gate are different, the transverse force generated when the molten iron flows through the two sides is different, so that the molten iron flows and can incline along the direction of the large transverse force, thereby finally changing the flowing direction of the whole molten iron), and the molten iron continuously impacts the specific part of the sand core in the product cavity, namely the sand core part in the feeding channel area; in the whole sand core, only the area is continuously heated by fresh high-temperature molten iron, and the heating time is longest compared with other areas, so that the heat storage effect of the sand core in the area is enhanced, the area temperature between the isolated hot spot and the feeding head is increased, the smoothness of the feeding channel can be ensured, sequential solidification is realized, the problem of shrinkage porosity and shrinkage porosity of the hot spot part of the casting is solved, and the quality of the casting is improved.
Drawings
Fig. 1 is a front view of the present invention;
Fig. 2 is a perspective view of the present invention;
3 FIG. 3 3 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
FIG. 4 is a schematic view of the molten iron flow direction in the feeding passage of the present invention;
Wherein: 1-sprue cup, 2-sprue, 3-filter screen, 4-feeding head, 5-inner sprue, 6-casting, 7-sand core and 8-hot spot.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
The following examples and drawings are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
referring to fig. 1-3, the casting system for the casting with isolated hot spot casting comprises a cavity and a sprue cup 1, wherein the cavity is internally divided into two product cavities by a same sand core 7 (the drawing of the embodiment replaces a product cavity by a casting 6, and the casting 6 is used for description in the following), a sprue 2 is connected to the bottom of the sprue cup 1, and a feeding head 4 is connected to the bottom of the sprue 2.
A filter screen 3 can be added between the sprue 2 and the feeding head 4 to filter molten iron.
Two inner gates 5 are respectively arranged on two side walls of the lower part of the feeding head 4 in parallel, the four inner gates 5 are respectively connected with the side surfaces of the upper parts of four castings 6, and four products are cast at one time.
the casting 6 in this embodiment is exemplified by a rail pad, and one rail pad has an upper hot spot portion 8 and a lower hot spot portion 8 (the hot spot portion is generally a thick portion in the casting product), because the casting 6 can self-feeding during the casting process of the lower hot spot portion 8, no additional feeding head is required.
The hot spot portion of the upper part of the casting 6 needs to be fed, so the position of the ingate 5 is arranged at the adjacent side of the hot spot portion 8, and a feeding channel is formed between the hot spot portion 8 and the ingate 5.
Referring to fig. 4 (each arrow in fig. 4 indicates the flow direction of molten iron during casting), two side edges of a horizontal section of the ingate 5 are inclined oppositely to form a channel structure which narrows from the feeding head 4 to the casting 6; and the inclination angle beta of the side adjacent to the sand core 7 is smaller than the inclination angle alpha of the other side.
The specific sizes of the inclination angles α and β are determined according to actual design requirements, and if the value of α - β is larger, the inclination angle of the molten iron flow direction in fig. 4 is larger, and the size of the inclination angle determines the specific position (area a indicated by a dashed line frame in fig. 4) of the impact heating sand core 7 after the molten iron enters the product cavity, and a specific skilled person can calculate the optimum angle as required.
When the casting mold is practically used for casting of track base plate castings, the design inclination angle alpha is about 30 degrees, and the inclination angle beta is about 20 degrees, so that the requirement can be met.
The working principle of the utility model is as follows:
because the two sides of the ingate 5 are inclined towards each other and the inclination angles α and β of the two sides are different, the flowing direction of the molten iron is changed when the molten iron flows through the ingate 5.
According to hydrodynamics, when the forward force of molten iron passes through the inclined plane of the side edge of the inner pouring gate, two forces are generated, namely a continuous forward force and a transverse force, and the larger the inclined angle of the molten iron contacting the side edge is, the larger the transverse force is generated.
Because the inclination angles alpha and beta of the two side edges of the inner pouring gate 5 are different, the sizes of transverse forces respectively generated when molten iron flows through the two side surfaces of the inner pouring gate 5 are different, and finally the molten iron flows to incline along the direction of the large transverse force, so that the flowing direction of the whole molten iron is finally changed, and the molten iron can continuously impact a specific part (area A, namely a sand core part in a feeding channel area) of a sand core 7 in a product cavity after passing through the inner pouring gate 5; therefore, in the whole sand core 7, only the area is continuously heated by fresh high-temperature molten iron, and the heating time is longest compared with other areas, so that the heat storage effect of the sand core 7 at the area A is enhanced, the area temperature between the isolated hot spot 8 and the feeding head 4 is improved, the smoothness of a feeding channel can be ensured, sequential solidification is realized, and the problem of shrinkage porosity and shrinkage porosity at the hot spot of a casting is solved.
Claims (3)
1. A casting system for a casting with isolated hot spots comprises a cavity and a sprue cup, wherein the cavity is internally divided into two product cavities by a same sand core, the bottom of the sprue cup is connected with a sprue, and the bottom of the sprue is connected with a feeding head; the method is characterized in that: the side wall of the lower part of the feeding head is provided with two inner gates in parallel, the two inner gates are respectively connected with the side surfaces of the upper parts of two product cavities, and the positions of the inner gates are adjacent to the hot junction parts of the product cavities; two side edges of the horizontal section of any inner sprue are inclined oppositely to form a channel structure which is narrowed from a feeding head to a product cavity; and the inclination angle of the side adjacent to the sand core is smaller than that of the other side.
2. a casting system for the presence of solitary hot spot castings according to claim 1, wherein: the feeding head comprises a feeding head, a feeding cavity, a feeding head and four product cavities, wherein the number of the cavities is two, two inner gates are respectively arranged on two side walls of the lower portion of the feeding head in parallel, and the four inner gates are respectively connected with the side faces of the upper portions of the four product cavities.
3. A casting system for the presence of solitary hot spot castings according to claim 1, wherein: and a filter screen is arranged between the sprue and the feeding head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920289714.7U CN209773394U (en) | 2019-03-07 | 2019-03-07 | Casting system for casting with isolated hot spot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920289714.7U CN209773394U (en) | 2019-03-07 | 2019-03-07 | Casting system for casting with isolated hot spot |
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| Publication Number | Publication Date |
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| CN209773394U true CN209773394U (en) | 2019-12-13 |
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| CN201920289714.7U Active CN209773394U (en) | 2019-03-07 | 2019-03-07 | Casting system for casting with isolated hot spot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570877A (en) * | 2022-03-02 | 2022-06-03 | 安徽合力股份有限公司合肥铸锻厂 | Casting process of large agricultural machine cross beam |
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2019
- 2019-03-07 CN CN201920289714.7U patent/CN209773394U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570877A (en) * | 2022-03-02 | 2022-06-03 | 安徽合力股份有限公司合肥铸锻厂 | Casting process of large agricultural machine cross beam |
| CN114570877B (en) * | 2022-03-02 | 2023-12-22 | 安徽合力股份有限公司合肥铸锻厂 | Casting process of large-scale agricultural machinery cross beam |
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