CN216397911U - Differential shell sand mould - Google Patents
Differential shell sand mould Download PDFInfo
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- CN216397911U CN216397911U CN202122338026.5U CN202122338026U CN216397911U CN 216397911 U CN216397911 U CN 216397911U CN 202122338026 U CN202122338026 U CN 202122338026U CN 216397911 U CN216397911 U CN 216397911U
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Abstract
The utility model discloses a differential shell sand mold die, which is used for molding green sand into a differential shell sand mold and comprises the following components: the upper die is provided with an upper parting surface, an upper core, an upper riser and an upper false box groove positioned between the upper core and the upper riser are formed on the upper parting surface of the upper die, the upper false box groove is arranged corresponding to the hot section of the differential shell and is communicated with the upper core, and the upper false box groove is used for forming a hot section stop block of the sand mold; the lower die is provided with a lower parting surface, a lower die core, a lower riser socket and a lower false box corresponding to the upper false box groove are formed on the lower parting surface of the lower die, the lower false box is used for forming a feeding channel of the sand mold and is matched with the upper false box groove, two ends of the lower false box are respectively connected with the lower die core and the lower riser socket, when the upper die and the lower die are aligned, the projection of the upper false box groove is superposed with the projection of the lower false box in the projection direction, and when the thermal node stop block is matched with the feeding channel, the thermal node stop block separates a feeding riser of the sand mold from a thermal node of a differential shell, so that the defects that the differential shell generates shrinkage cavities and shrinkage porosity at the thermal node can be prevented.
Description
Technical Field
The utility model relates to the technical field of casting processing, in particular to a differential shell sand mold.
Background
The differential shell of the automobile differential mechanism is formed by casting a sand mold, the sand mold is manufactured by a differential shell sand mold, the existing differential shell sand mold comprises an upper mold and a lower mold, the upper mold is used for forming the upper mold of the sand mold, an upper mold core and an upper riser are formed on the upper parting surface of the upper mold, the upper riser is used for feeding the formed sand mold, the lower mold is used for forming the lower mold of the sand mold, the lower parting surface of the lower mold corresponds to the upper mold core respectively, the upper riser is formed with a lower mold core and a lower riser, and the upper mold and the lower mold of the sand mold form a cavity for forming the differential shell during mold closing. However, when the poor shell is cast by using the sand mold manufactured by the poor shell sand mold, shrinkage cavities and shrinkage porosity defects often occur near a feeding head of the poor shell, so that the quality of the poor shell is reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a differential shell sand mold capable of reducing the defects of differential shell shrinkage cavity and shrinkage porosity.
In order to achieve the purpose, the utility model adopts the following technical scheme:
poor shell sand mould for be the sand mould of poor shell with the green sand shaping, include:
the upper die is provided with an upper parting surface, an upper core, an upper riser positioned on one side of the upper core and an upper false box groove positioned between the upper core and the upper riser are formed on the upper parting surface of the upper die, the upper false box groove is arranged corresponding to a hot junction of the differential shell and is communicated with the upper core, and the upper false box groove is used for forming a hot junction stop block of the sand mold;
the lower die is provided with a lower parting surface, the lower die corresponds to the upper die core, the upper riser and the upper false box groove on the lower parting surface to form a lower die core, a lower riser socket and a lower false box respectively, the lower false box is used for forming a feeding channel of the sand mold and is matched with the upper false box groove, two ends of the lower false box are respectively connected with the lower die core and the lower riser socket, and when the upper die is aligned with the lower die, the projection of the upper false box groove is superposed with the projection of the lower false box in the projection direction.
Further, the depth of the upper false box groove is smaller than the height of the lower false box, and when viewed from a direction perpendicular to the cross section of the upper false box groove, the projected area of the upper false box groove is larger than or equal to the area of the heat joint.
Further, when viewed in a direction perpendicular to the lower parting plane, a projection of the upper false box groove coincides with a projection of the lower false box, and a projected area of the upper false box groove is smaller than or equal to a projected area of the lower false box.
Further, in a direction perpendicular to the upper parting plane, the upper false box groove has a first end and a second end which are arranged oppositely, the first end is close to the upper riser relative to the second end, and the upper false box groove is gradually reduced from the first end to the second end.
Furthermore, the lower mould is in be formed with protrusion in on the die joint down two of die joint top let the position piece, two let the position piece respectively certainly down the false box with the protruding formation of stretching of the both sides wall that goes up the false box groove and correspond, just let the one end of position piece with the die core links up down.
Furthermore, the height of the letting block is greater than or equal to the depth of the upper false box groove and less than the height of the lower false box.
Furthermore, there are two upper cores, and one upper riser is disposed between the two upper cores, and accordingly, the lower mold forms two lower cores and the lower riser cavity on the lower parting surface corresponding to the two upper cores and the upper riser, respectively.
According to the upper die of the differential shell sand mold die, the upper false box groove of the hot junction stop block for molding the sand mold is formed on the upper parting surface, the upper false box groove is arranged corresponding to the hot junction of the differential shell and is communicated with the upper core, the lower die is arranged on the lower parting surface and corresponds to the upper false box groove to form the lower false box which is used for molding the pouring gate of the sand mold and is matched with the upper false box groove, when the upper die and the lower die are aligned, the projection of the upper false box groove is superposed with the projection of the lower false box in the projection direction, namely the hot junction stop block of the sand mold is matched with the pouring gate, and when the upper die and the lower die of the sand mold are closed, the hot junction stop block separates the feeding shrinkage head of the sand mold from the hot junction of the differential shell, so that the metal liquid in the feeding head can be prevented from flowing into a cavity from the hot junction, the defect that the differential shell generates shrinkage holes and shrinkage porosity at the hot junction is avoided, and the casting quality of the differential shell is improved.
Drawings
Fig. 1 is a three-dimensional exploded schematic view of a differential shell sand mold of the present invention:
FIG. 2 is a front view of the upper die of FIG. 1;
FIG. 3 is a front view of the lower die of FIG. 1;
FIG. 4 is a schematic exploded perspective view of a sand mold of the present invention;
FIG. 5 is a view showing a clamped state of FIG. 4;
fig. 6 is a partially enlarged view of a portion a of fig. 5.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1 to 6, the differential shell sand mold of the present invention is a differential shell sand mold for molding green sand into a differential shell sand mold 3, and the sand mold 3 is used for molding a differential shell, wherein the differential shell is a right shell of a differential shell of an automobile axle, as shown in fig. 3 and 4, the differential shell sand mold comprises an upper mold 1 and a lower mold 2, the upper mold 1 is used for molding an upper mold 31 of the sand mold 3, the lower mold 2 is used for molding a lower mold 32 of the sand mold 3, the upper mold 31 is located above the lower mold 32 and forms a plurality of cavities 30 for molding the differential shell after the two molds are closed, and runners 36 of the sand mold 3 are communicated with runners (not shown) thereof, the cavities 30 are used for filling molten metal for molding the differential shell, and in this embodiment, the molten metal is molten iron or molten steel.
As shown in fig. 1 and 2, the upper mold 1 has an upper parting surface 11, the upper mold 1 is formed with an upper core 12, an upper riser 13 located on one side of the upper core 12, and an upper dummy box groove 14 located between the upper core 12 and the upper riser 13 on the upper parting surface 11, the upper core 12 is used for molding a cavity 30 of the sand mold 3, in this embodiment, there are two upper cores 12, and one upper riser 13 is located between the two upper cores 12. As shown in fig. 2 and 5, the feeding head 13 is used for forming the feeding head 35 of the sand mold 3, and the feeding head 35 is used for feeding water along the plane of the parting surface of the sand mold 3, and the position is just the intersection of the circular ring shape of the differential shell and the plane, and the wall thickness of the differential shell at the position is thicker than that at other positions, so that the thermal node formed by the differential shell at the position is larger, namely the thermal node 4 of the differential shell is arranged at the position, therefore, the upper false box slot 14 is arranged corresponding to the thermal node of the differential shell and communicated with the upper core 12, and the upper false box slot 14 is used for forming the thermal node stopper 33 of the sand mold 3. Specifically, the depth of the upper dummy box groove 14 is smaller than the height of the lower dummy box 24, and the projected area of the upper dummy box groove 14 is larger than or equal to the area of the thermal joint when viewed in a direction perpendicular to the cross section of the upper dummy box groove 14, so as to shield the thermal joint 4.
As shown in fig. 1 and 3, the lower mold 2 has a lower parting surface 21, and the lower mold 2 forms a lower core 22, a lower riser 23, and a lower dummy box 24 on the lower parting surface 21 corresponding to the upper core 12, the upper riser 13, and the upper dummy box groove 14, and in this embodiment, the lower mold 2 forms two lower cores 22 and lower riser sockets 23 on the lower parting surface 21 corresponding to the upper cores 12 and the upper riser 13, respectively, and the lower cores 22, the lower riser sockets 23, and the lower dummy box 24 are all protruded above the lower parting surface 21. As shown in fig. 3 and 5, the lower rail socket 23 is used to form a feeding rail socket (not numbered) of the sand mould 3 and an outer side wall thereof remote from the lower core 22 joins the lower runner 26 of the runner 36 used to form the sand mould 3. The lower dummy box 24 is used for forming a feeding channel 34 of the sand mold 3 and is matched with the upper dummy box groove 14, two ends of the lower dummy box 24 are respectively connected with the lower core 22 and the lower riser socket 23, namely, the lower cross channel 26, the feeding riser socket, the feeding channel 34 and the cavity 30 of the sand mold 3 are sequentially communicated to form a water feeding channel for metal liquid to flow, the water feeding channel is communicated with the feeding riser 35, when the upper mold 1 and the lower mold 2 are aligned in the vertical direction, the upper parting surface 11 is aligned with the lower parting surface 21 in a face-to-face mode, and in the projection direction, the projection of the upper dummy box groove 14 is overlapped with the projection of the lower dummy box 24. Through the arrangement of the upper dummy box groove 14 and the lower dummy box 24 which are matched with each other, the hot junction stop block 33 of the sand mold 3 can be matched with the upper end of the feeding channel 34, when the upper mold 31 and the lower mold 32 of the sand mold 3 are closed, the hot junction stop block 33 is matched with the upper end of the feeding channel 34, at the moment, the feeding head 35 of the sand mold 3 and the hot junction 4 of the differential shell are separated by the hot junction stop block 33, the phenomenon that metal liquid in the feeding head 35 flows into the cavity 30 from the hot junction 4 can be avoided, the defects that the differential shell generates shrinkage cavities and shrinkage porosity at the hot junction 4 are avoided, and the casting quality of the differential shell is improved.
As shown in fig. 2 and 6, in the present embodiment, the direction perpendicular to the lower parting plane 21 is defined as the projection direction, the projection of the upper dummy box groove 14 coincides with the projection of the lower dummy box 24 when viewed in the projection direction, and the projection area of the upper dummy box groove 14 is smaller than or equal to the projection area of the lower dummy box 24, so that the hot spot stopper 33 can block the hot spot 4 and prevent the molten metal from flowing into the cavity 30 from the hot spot while ensuring the molten metal in the runner 34 to smoothly flow into the cavity 30.
As shown in fig. 1 and 2, in order to make the thermal junction stopper 33 smoothly fit with the upper end of the sprue 34 due to the manufacturing tolerance, the upper dummy box groove 14 has a first end 141 and a second end 142 which are oppositely arranged in a direction perpendicular to the upper parting plane 11, the first end 141 is close to the upper riser 13 relative to the second end 142, and the upper dummy box groove 14 is gradually reduced from the first end 141 toward the second end 142, so that the thermal junction stopper 33 can be smoothly guided into the upper end of the sprue 34 through the bottom end thereof to fit with the upper end of the sprue 34.
As shown in fig. 1 and 3, in order to further ensure that the hot junction stopper 33 is smoothly fitted to the upper end of the gate 34, the lower mold 2 further has two relief blocks 25 formed on the lower parting surface 21 and protruding above the lower parting surface 21, the two relief blocks 25 are formed to protrude from two side walls of the lower dummy box 24 corresponding to the upper dummy box groove 14, and one end of the relief block 25 is engaged with the lower core 22. The yielding block 25 is used for forming the yielding space 37 of the sand mold 3, the height of the yielding block 25 is larger than or equal to the depth of the upper false box groove 14 and smaller than the height of the lower false box 24, and the yielding block 25 is arranged, so that the manufacturing tolerance can be compensated, the feeding gate 34 can provide the yielding space 37 for the hot joint stop block 33, and the hot joint stop block 33 can smoothly enter the feeding gate 34 to be matched with the upper end of the feeding gate 34.
According to the upper die of the differential shell sand mold die, the upper false box groove of the hot junction stop block for molding the sand mold is formed on the upper parting surface, the upper false box groove is arranged corresponding to the hot junction of the differential shell and is communicated with the upper core, the lower die is arranged on the lower parting surface and corresponds to the upper false box groove to form the lower false box which is used for molding the pouring gate of the sand mold and is matched with the upper false box groove, when the upper die and the lower die are aligned, the projection of the upper false box groove is superposed with the projection of the lower false box in the projection direction, namely the hot junction stop block of the sand mold is matched with the pouring gate, and when the upper die and the lower die of the sand mold are closed, the hot junction stop block separates the feeding shrinkage head of the sand mold from the hot junction of the differential shell, so that the metal liquid in the feeding head can be prevented from flowing into a cavity from the hot junction, the defect that the differential shell generates shrinkage holes and shrinkage porosity at the hot junction is avoided, and the casting quality of the differential shell is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.
Claims (7)
1. Poor shell sand mould for be the sand mould of poor shell with the green sand shaping, its characterized in that includes:
the upper die is provided with an upper parting surface, an upper core, an upper riser positioned on one side of the upper core and an upper false box groove positioned between the upper core and the upper riser are formed on the upper parting surface of the upper die, the upper false box groove is arranged corresponding to a hot junction of the differential shell and is communicated with the upper core, and the upper false box groove is used for forming a hot junction stop block of the sand mold;
the lower die is provided with a lower parting surface, the lower die corresponds to the upper die core, the upper riser and the upper false box groove on the lower parting surface to form a lower die core, a lower riser socket and a lower false box respectively, the lower false box is used for forming a feeding channel of the sand mold and is matched with the upper false box groove, two ends of the lower false box are respectively connected with the lower die core and the lower riser socket, and when the upper die is aligned with the lower die, the projection of the upper false box groove is superposed with the projection of the lower false box in the projection direction.
2. A differential sand mold according to claim 1, wherein the depth of the upper dummy box groove is smaller than the height of the lower dummy box, and the projected area of the upper dummy box groove is greater than or equal to the area of the thermal joint as viewed in a direction perpendicular to the cross section of the upper dummy box groove.
3. A differential sand mold according to claim 1, wherein a projection of the upper dummy box groove coincides with a projection of the lower dummy box as viewed in a direction perpendicular to the lower parting plane, and a projected area of the upper dummy box groove is smaller than or equal to a projected area of the lower dummy box.
4. A differential sand mold according to claim 1, wherein said false top casing has a first end and a second end disposed opposite to each other in a direction perpendicular to said upper parting plane, said first end being adjacent to said riser relative to said second end, said false top casing being tapered from said first end toward said second end.
5. The differential shell sand mold die according to claim 1, wherein the lower die is formed with two yielding blocks protruding above the lower parting surface on the lower parting surface, the two yielding blocks are formed by protruding from two side walls of the lower false box corresponding to the upper false box groove, and one end of each yielding block is connected with the lower core.
6. A differential sand molding mold according to claim 5, wherein the height of the relief block is greater than or equal to the depth of the upper dummy box groove and less than the height of the lower dummy box.
7. A differential sand mold according to claim 1, wherein there are two of said upper cores, and said upper riser is provided between two of said upper cores, and correspondingly, said lower mold forms two of said lower cores and said lower riser cavity on said lower parting plane corresponding to said two upper cores and said upper riser, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122338026.5U CN216397911U (en) | 2021-09-24 | 2021-09-24 | Differential shell sand mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122338026.5U CN216397911U (en) | 2021-09-24 | 2021-09-24 | Differential shell sand mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216397911U true CN216397911U (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122338026.5U Active CN216397911U (en) | 2021-09-24 | 2021-09-24 | Differential shell sand mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216397911U (en) |
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2021
- 2021-09-24 CN CN202122338026.5U patent/CN216397911U/en active Active
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