CN211758325U - Core box - Google Patents
Core box Download PDFInfo
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- CN211758325U CN211758325U CN201922374852.8U CN201922374852U CN211758325U CN 211758325 U CN211758325 U CN 211758325U CN 201922374852 U CN201922374852 U CN 201922374852U CN 211758325 U CN211758325 U CN 211758325U
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- sand shooting
- sand
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- core box
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Abstract
A core box comprises a lower core box, an upper core box, a sand shooting device and a core ejecting device; an upper cavity is arranged on the upper core box, a lower cavity is arranged on the lower core box, and the upper cavity and the lower cavity form a molding cavity of the sand core after the upper core box and the lower core box are assembled; the sand shooting device comprises a sand shooting plate, a sand shooting nozzle arranged at the lower part of the sand shooting plate and a first positioning pin, wherein a step hole is arranged in the sand shooting nozzle and comprises a large step part at the upper end and a small step part connected to the lower end of the large step part; the upper end of the stepped hole is flush with the upper end part of the sand shooting nozzle, and the lower end of the stepped hole is flush with the lower end part of the sand shooting nozzle; the top core device comprises a top core plate, a top core rod arranged at the lower part of the top core plate and a second positioning pin; can subtract a large amount of short sand shooting poles, no residue has even made things convenient for the manual work to get rid of, has saved the tectorial membrane sand quantity, reduces the psammitolite cost.
Description
Technical Field
The utility model relates to a be used for producing tectorial membrane sand psammitolite core box belongs to casting process equipment field.
Background
At present, a core box of a sand core needs to be manufactured firstly when a precoated sand core is produced, and then the core box is connected to equipment for production. The core box of the sand core generally comprises a sand shooting plate, a sand shooting nozzle and other complete sets of sand shooting devices. And during sand shooting, the equipment blows the particle coated sand into a core box cavity through a sand shooting nozzle and a sand shooting hole in a mold to form a sand core shape. The sand shooting holes in the mold are also filled with sand to form a sand shooting rod. Because the mold has a certain thickness, a long residual sand shooting rod is formed and left on the surface of the sand core. After the sand core is taken out of the die cavity, the residual sand shooting rod needs to be manually removed by a tool. The thicker the mold, the longer the remaining shooting bar generally, the more cumbersome it is to manually remove, and the more waste sand is consumed.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned not enough and provide a core box that prior art exists, can subtract the shot-bar of shortfall in a large number, do not have even and remain, made things convenient for the manual work to get rid of, saved tectorial membrane sand quantity, reduce the psammitolite cost.
The technical scheme of the utility model is that:
a core box comprises a lower core box, an upper core box, a sand shooting device and a core ejecting device; the upper core box is provided with an upper cavity, the lower core box is provided with a lower cavity, and the upper cavity and the lower cavity form a molding cavity of the sand core after the upper core box and the lower core box are assembled;
the sand shooting device comprises a sand shooting plate, a sand shooting nozzle arranged at the lower part of the sand shooting plate and a first positioning pin, wherein a step hole is arranged in the sand shooting nozzle and comprises a large step part at the upper end and a small step part connected to the lower end of the large step part; the upper end of the stepped hole is flush with the upper end part of the sand shooting nozzle, and the lower end of the stepped hole is flush with the lower end part of the sand shooting nozzle;
the top core device comprises a top core plate, a top core rod arranged at the lower part of the top core plate and a second positioning pin;
the upper core box is provided with a sand shooting hole, and a sand shooting nozzle of the sand shooting device and a core ejecting rod of the core ejecting device respectively correspond to the sand shooting hole; the upper core box is also provided with a guide hole, and a first positioning pin of the sand shooting device and a second positioning pin of the core ejecting device respectively correspond to the guide hole.
The large step part of the stepped hole comprises a first large step part and a second large step part connected to the lower end of the first large step part, the middle of the bottom surface of the second large step part is a truncated cone-shaped bulge, the diameter of the upper plane of the bulge is larger than the diameter of the small step part of the stepped hole, the diameter of the lower plane of the bulge is matched with the diameter of the small cylindrical table of the sand blocking block, and a groove matched with the bulge is formed in the lower bottom surface of the small cylindrical table of the sand blocking block.
The periphery of the bottom surface of the second large step part is provided with an annular groove, and the bottom surface of the second large step part is connected with the side wall of the second large step part in an arc manner.
The outer end face of the sand shooting nozzle is a stepped cylindrical face and comprises a first cylindrical face, a second cylindrical face and a third cylindrical face, and the diameter of the second cylindrical face is larger than that of the first cylindrical face and that of the third cylindrical face.
The lower end part of the second cylindrical surface is provided with a sealing groove, and a rubber ring is arranged in the sealing groove.
The rubber ring is an annular body matched with the sealing groove, and the inner end face and the outer end face of the rubber ring are both inclined; the lower plane of the rubber ring is 1-2mm higher than the lower plane of the second cylindrical surface.
And an insert sleeve is arranged at the sand shooting hole.
And a positioning sleeve is arranged at the guide hole.
The guide hole is a step counter bore and comprises a large step hole and a small step hole connected below the large step hole, and the step-shaped positioning sleeve is arranged in the guide hole.
And the sand shooting plate is provided with a first threaded hole for installing the first positioning pin and a second threaded hole for installing the sand shooting nozzle.
The utility model discloses beneficial effect: compared with the prior art, the utility model can shorten the sand shooting rod in a large amount, even has no residue, is convenient for manual removal, saves the usage amount of precoated sand, and reduces the cost of the sand core; is more suitable for the production of the sand core with a larger core shooting size.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of the present invention;
FIG. 3 is a front view of a sand stop;
FIG. 4 is a top view of a sand stop;
FIG. 5 is a schematic structural view of a blast nozzle;
FIG. 6 is a schematic structural view of a rubber ring;
in the figure, 1, a lower core box, 2, an upper core box, 3, a positioning sleeve, 4, a first threaded hole, 5, a first positioning pin, 6, a second threaded hole, 7, a sand shooting nozzle, 8, a rubber ring, 9, a sand shooting plate, 10, an embedding sleeve, 11, a sand blocking block, 12, a core ejecting rod, 13, a core ejecting plate, 14, a step hole, 15 and a sealing groove.
Detailed Description
In fig. 1 and 2, the utility model comprises a lower core box 1, an upper core box 2, a sand shooting device and a core ejecting device; the upper core box 2 is provided with an upper cavity, the lower core box 1 is provided with a lower cavity, and the upper cavity and the lower cavity form a molding cavity of the sand core after the upper core box 2 and the lower core box 1 are assembled.
The sand shooting device comprises a sand shooting plate 9, a sand shooting nozzle 7 and a first positioning pin, wherein the sand shooting nozzle 7 is arranged at the lower part of the sand shooting plate 9, a step hole 14 is formed inside the sand shooting nozzle 7 and comprises a large step hole at the upper end and a small step hole connected to the lower end of the large step hole, a sand blocking block 11 is arranged in the large step hole, the sand blocking block 11 is a step cylinder with a large upper part and a small lower part, the diameter of the small step cylinder is larger than that of the small step hole of the step hole 14, and a plurality of notches are uniformly distributed on the periphery of the; the upper end of the stepped hole 14 is flush with the upper end of the sand shooting nozzle 7, and the lower end of the stepped hole is flush with the lower end of the sand shooting nozzle 7; and a threaded hole I4 for installing the positioning pin I and a threaded hole II 6 for installing the sand shooting nozzle 7 are formed in the sand shooting plate 9.
The core ejecting device comprises a core ejecting plate 13, a core ejecting rod 12 arranged at the lower part of the core ejecting plate and a second positioning pin.
The upper core box 2 is provided with a sand shooting hole, and a sand shooting nozzle 7 of the sand shooting device and a core ejecting rod 12 of the core ejecting device respectively correspond to the sand shooting hole; the upper core box 2 is also provided with a guide hole, and a first positioning pin of the sand shooting device and a second positioning pin of the core ejecting device respectively correspond to the guide hole.
The sand shooting hole is provided with an insert sleeve 10, the guide hole is a step counter bore and comprises a large step hole and a small step hole connected below the large step hole, and the step-shaped positioning sleeve 3 is arranged in the guide hole.
In fig. 3 and 4, the sand blocking block 11 is a cylinder with a small upper part and a large lower part, the diameter of the cylinder with the small step is larger than that of the step hole 14, and four notches are uniformly distributed on the periphery of the cylinder with the large step.
In fig. 5 and 6, a step hole 14 is formed inside the sand shooting nozzle 7, and comprises a large step hole at the upper end and a small step hole connected to the lower end of the large step hole, the large step part of the step hole 14 comprises a first large step part and a second large step part connected to the lower end of the first large step part, the middle part of the bottom surface of the second large step part is a circular truncated cone-shaped bulge, the upper plane diameter of the bulge is larger than the diameter of the small step part of the step hole 14, the lower plane diameter of the bulge is matched with the diameter of the small circular truncated cone of the sand blocking block 11, the lower bottom surface of the small circular truncated cone of the sand blocking block 11 is provided with a groove matched with the bulge, the periphery of the bottom surface of the second large step part is provided with an annular groove, the bottom surface of the second large step part is connected with the side wall of the second large step part in an arc manner, and the annular groove is arranged to increase the cavity space between the large circular, meanwhile, residual sand can be accumulated, the residual sand is prevented from entering the small step part of the step hole 14 to form a sand shooting rod, and the arrangement of the truncated cone-shaped bulge is also favorable for blowing up the sand blocking block 11; the outer end face of the sand shooting nozzle 7 is a stepped cylindrical face and comprises a first cylindrical face, a second cylindrical face and a third cylindrical face, wherein the diameter of the second cylindrical face is larger than that of the first cylindrical face and that of the third cylindrical face; a sealing groove 15 is arranged at the lower end part of the second cylindrical surface, a rubber ring 8 is arranged in the sealing groove 15, the sealing groove 15 is an annular groove body, the cross section of the sealing groove 15 is a cylindrical table, the diameter of the upper bottom surface of the cylindrical table is larger than that of the lower bottom surface of the cylindrical table, the rubber ring 8 is an annular body matched with the sealing groove 15, and the inner end surface and the outer end surface of the rubber ring 8 are both inclined; the lower plane of the rubber ring 8 is 1-2mm higher than the lower plane of the second cylindrical surface after being pressed into the sealing groove 15, so that the rubber ring can be effectively pressed during sand blowing, and air pressure and sand grains cannot be leaked.
When the sand shooting device is used, the sand shooting plate 9 is pressed down quickly, the first positioning pin 5 on the sand shooting plate 9 firstly enters the positioning sleeve 3 on the guide hole of the upper core box 2, the lower end of the sand shooting nozzle 7 extends into the inner hole of the insert sleeve 10 of the upper core box 2 along with the sand shooting plate 9 until the rubber ring 8 at the lower end part of the second cylindrical surface of the sand shooting nozzle 7 is attached to the upper surface of the upper core box 2, and the lower end plane of the sand shooting nozzle 7 is flush with the upper surface of the upper cavity of the upper core box 2 at the moment; the sand shooting is started, sand is blown into an inner cavity of the sand nozzle 7 along with high air pressure, at the moment, because four notches are uniformly distributed on the periphery of a large step cylinder of the sand blocking block 11, the sand blocking block 11 is flushed by high air pressure reaction force, the sand enters a small step part at the bottom of a step hole 14 from the gap and then enters a molding cavity of a sand core formed by the lower core box 1 and the upper core box 2, after the cavity is filled with the sand, pressure relief is carried out, and the sand shooting is finished, at the moment, the sand blocking block 11 in the sand shooting nozzle 7 falls back to the plane of the step hole 14 of the sand shooting nozzle 7, the sand can be blocked from falling, the sand is effectively prevented from falling on the sand shooting hole to form a sand shooting rod, and along with the rapid upward movement of the sand shooting plate 9, the first positioning pin 5 and the sand shooting; then, the sand shooting plate 9 is horizontally moved out of the range of the upper core box 2, the sand becomes a sand core after being solidified in the molding cavity, the top core plate 13 is moved above the upper core box 2, along with the rapid downward movement of the top core plate 13, a second positioning pin on the top core plate 13 firstly enters the positioning sleeve 3 of the upper core box 2 for guiding, and the lower end of the top core rod 12 extends into the inner hole of the insert sleeve 10 of the upper core box 2 along with the top core plate 13 to contact with the surface of the sand core to eject the sand core; the utility model discloses be more applicable to for the great plane in sand shooting position size position that sets up, because this kind of bayonet nozzle 7 is because the sand blocking piece 11 of need putting into, the structure is more complicated, about 15-20mm than general nozzle diameter will be big.
Claims (10)
1. A core box characterized by: comprises a lower core box (1), an upper core box (2), a sand shooting device and a core ejecting device; an upper cavity is arranged on the upper core box (2), a lower cavity is arranged on the lower core box (1), and the upper cavity and the lower cavity form a molding cavity of the sand core after the upper core box (2) and the lower core box (1) are assembled;
the sand shooting device comprises a sand shooting plate (9), a sand shooting nozzle (7) and a first positioning pin, wherein the sand shooting nozzle (7) is arranged at the lower part of the sand shooting plate (9), a step hole (14) is arranged in the sand shooting nozzle (7), the sand shooting nozzle comprises a large step part at the upper end and a small step part connected to the lower end of the large step part, a sand blocking block (11) is arranged at the bottom of the large step part, the sand blocking block (11) is a step cylinder with a large upper part and a small lower part, the diameter of the small step cylinder is larger than that of the small step part of the step hole (14), and; the upper end of the stepped hole (14) is flush with the upper end part of the sand shooting nozzle (7), and the lower end of the stepped hole is flush with the lower end part of the sand shooting nozzle (7);
the top core device comprises a top core plate (13), a top core rod (12) arranged at the lower part of the top core plate and a second positioning pin;
a sand shooting hole is formed in the upper core box (2), and a sand shooting nozzle (7) of the sand shooting device and a core jacking rod (12) of the core jacking device correspond to the sand shooting hole respectively; the upper core box (2) is also provided with a guide hole, and a first positioning pin of the sand shooting device and a second positioning pin of the core ejecting device respectively correspond to the guide hole.
2. A core box according to claim 1, characterized in that: the big step portion of step hole (14) includes first big step portion, connects in the big step portion of second of first big step portion lower extreme, and the big step portion bottom surface middle part of second is the arch of a circular truncated cone form, and the plane diameter is greater than the little step portion diameter of step hole (14) on the arch, and protruding lower plane diameter and the little circular truncated cone diameter phase-match of sand blocking piece (11), the little circular truncated cone lower floor of sand blocking piece (11) is equipped with the recess with protruding assorted.
3. A core box according to claim 2, characterized in that: the periphery of the bottom surface of the second large step part is provided with an annular groove, and the bottom surface of the second large step part is connected with the side wall of the second large step part in an arc manner.
4. A core box according to claim 1, characterized in that: the outer end face of the sand shooting nozzle (7) is a stepped cylindrical face and comprises a first cylindrical face, a second cylindrical face and a third cylindrical face, and the diameter of the second cylindrical face is larger than that of the first cylindrical face and that of the third cylindrical face.
5. A core box according to claim 4, characterized in that: the lower end part of the second cylindrical surface is provided with a sealing groove (15), and a rubber ring (8) is arranged in the sealing groove (15).
6. A core box according to claim 5, characterized in that: the rubber ring (8) is an annular body matched with the sealing groove (15), and the inner end face and the outer end face of the rubber ring (8) are both provided with slopes; the lower plane of the rubber ring (8) is 1-2mm higher than the lower plane of the second cylindrical surface.
7. A core box according to claim 1, characterized in that: an inlay sleeve (10) is arranged at the sand shooting hole.
8. A core box according to claim 1, characterized in that: and a positioning sleeve (3) is arranged at the guide hole.
9. A core box according to claim 8, characterized in that: the guide hole is a step counter bore and comprises a large step hole and a small step hole connected below the large step hole, and the step-shaped positioning sleeve (3) is arranged in the guide hole.
10. A core box according to claim 1, characterized in that: and a first threaded hole (4) for installing a first positioning pin and a second threaded hole (6) for installing a sand shooting nozzle (7) are formed in the sand shooting plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922374852.8U CN211758325U (en) | 2019-12-26 | 2019-12-26 | Core box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922374852.8U CN211758325U (en) | 2019-12-26 | 2019-12-26 | Core box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211758325U true CN211758325U (en) | 2020-10-27 |
Family
ID=72979555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922374852.8U Active CN211758325U (en) | 2019-12-26 | 2019-12-26 | Core box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211758325U (en) |
-
2019
- 2019-12-26 CN CN201922374852.8U patent/CN211758325U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A core box Effective date of registration: 20220623 Granted publication date: 20201027 Pledgee: Bank of China Limited Xiangyang Branch Pledgor: XINXING HEAVY INDUSTRY HUBEI 3611 MECHANICAL Co.,Ltd. Registration number: Y2022980008672 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230926 Granted publication date: 20201027 Pledgee: Bank of China Limited Xiangyang Branch Pledgor: XINXING HEAVY INDUSTRY HUBEI 3611 MECHANICAL Co.,Ltd. Registration number: Y2022980008672 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |