CN218891164U - Lower core-pulling piston mold structure - Google Patents
Lower core-pulling piston mold structure Download PDFInfo
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- CN218891164U CN218891164U CN202223205076.7U CN202223205076U CN218891164U CN 218891164 U CN218891164 U CN 218891164U CN 202223205076 U CN202223205076 U CN 202223205076U CN 218891164 U CN218891164 U CN 218891164U
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Abstract
The utility model discloses a lower core-pulling piston mold structure which comprises a mold body, wherein at least one piston cavity is arranged in the mold body, a pouring channel communicated with the piston cavity is arranged on the mold body, a lower core-pulling mechanism is connected in the piston cavity, valve avoiding pits are respectively arranged on the left side and the right side of the top of a piston formed by the piston cavity, and side riser cavities are respectively arranged on the upper side and the lower side of the top of the piston cavity. The utility model can effectively improve the shrinkage porosity problem in the casting process of the piston and effectively improve the casting quality of the piston.
Description
Technical Field
The utility model relates to the technical field of piston molds, in particular to a lower core-pulling piston mold structure.
Background
As shown in fig. 1, the top of the head of the existing large-displacement piston 01 is provided with four valve avoiding pits 02. Because the two ends of the middle part of the top surface of the piston 01 are provided with isolated heat nodes, when the piston is cast by adopting the existing lower core-pulling die, the heat nodes 03 at the two ends of the middle part of the top surface of the piston 01 are easy to shrink, so that the casting quality of the piston 01 is affected.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a lower core-pulling piston mold structure so as to improve the casting quality of a piston.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a lower core-pulling piston mould structure, includes the mould body, has at least one piston die cavity in the mould body, has the runner that communicates to the piston die cavity on the mould body, piston die cavity internal connection has lower core-pulling mechanism, has the valve respectively by piston die cavity shaping the piston top left and right sides and dodges the hole, both sides are equipped with limit riser chamber respectively about the top of piston die cavity.
Further, the end of the pouring channel is divided into an upper pouring section and a lower pouring section which are communicated with the side wall of the piston cavity.
Further, a pouring cavity is arranged at the joint of the upper pouring section and the piston cavity.
Further, an air cooling hole is formed above the piston cavity and at one side of the upper casting section.
Further, the die body is internally provided with two symmetrically arranged piston cavities.
Further, a filter screen placement area is arranged in the pouring channel.
The utility model adopts the technical proposal and has the following beneficial technical effects:
1. the upper side and the lower side of the top of the piston cavity are respectively provided with an edge riser cavity, and the two edge risers can feed isolated hot nodes on the upper side and the lower side of the top of the piston in the casting process to prevent shrinkage porosity, so that the casting quality of the piston is improved;
2. the pouring channel is designed into an upper pouring section and a lower pouring section to meet the casting flow and skimming requirements of the large-displacement piston;
3. by arranging the wind cooling hole and arranging the pouring cavity at the joint of the upper pouring section and the piston cavity, shrinkage porosity at the joint of the piston and the pouring channel can be effectively solved, so that the casting quality of the piston is improved;
4. the filter screen placement area is arranged in the pouring channel, so that the condition of slag holes can be improved, and the casting quality of the piston is improved.
Drawings
The utility model is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic top view of a piston;
fig. 2 is a cross-sectional view (front view) of the present utility model;
FIG. 3 is a cross-sectional view (side view) of the present utility model
Fig. 4 is a diagram of a piston blank cast.
Detailed Description
As shown in fig. 2-4, the lower core-pulling piston mold structure comprises a mold body 1, wherein at least one piston cavity 2 is arranged in the mold body 1, a runner 5 communicated with the piston cavity 2 is arranged on the mold body 1, a lower core-pulling mechanism 3 is connected in the piston cavity 2, valve avoiding pits are respectively arranged on the left side and the right side of the top of a piston 9 formed by the piston cavity 2, and side riser cavities 4 are respectively arranged on the upper side and the lower side of the top of the piston cavity 2. The upper side and the lower side of the top of the piston cavity 2 are respectively provided with the side riser cavities 4, and two side risers 10 can feed isolated hot nodes on the upper side and the lower side of the top of the piston 9 in the casting process, so that shrinkage porosity is prevented, and the casting quality of the piston 9 is improved.
Further, the end of the runner 5 is divided into an upper run 51 and a lower run 52, which communicate with the side wall of the piston cavity 2. The runner 5 is designed as upper and lower runner segments 52 to meet the high displacement piston casting flow and skimming requirements.
Further, a casting head cavity 7 is arranged at the joint of the upper casting section 51 and the piston cavity 2. And an air cooling hole 6 is arranged above the piston cavity 2 and at one side of the upper casting section 51. By arranging the wind cooling hole 6 and the casting head 11 formed at the joint of the upper casting section 51 and the piston cavity 2, shrinkage porosity at the joint of the piston 9 and the pouring channel 5 can be effectively solved, so that the casting quality of the piston is improved.
Furthermore, the die body 1 is internally provided with two symmetrically arranged piston cavities 2, and two pistons 9 can be formed at the same time by one casting, so that the casting efficiency of the pistons 9 is improved.
Further, the filter screen placing area 8 is arranged in the pouring channel 5, and the condition of slag holes can be improved by placing the filter screen, so that the casting quality of the piston is improved.
The practice of the utility model is described above with reference to the accompanying drawings, but the utility model is not limited to the specific embodiments described above, which are intended to be illustrative rather than limiting, and it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (6)
1. The utility model provides a lower core-pulling piston mould structure, includes the mould body, has at least one piston die cavity in the mould body, has the runner that communicates to the piston die cavity on the mould body, piston die cavity internal connection has down core-pulling mechanism, has the valve respectively by piston die cavity shaping the piston top left and right sides and dodges the hole, its characterized in that: and the upper side and the lower side of the top of the piston cavity are respectively provided with an edge riser cavity.
2. The lower core-pulling piston mold structure according to claim 1, wherein: the end of the pouring channel is divided into an upper pouring section and a lower pouring section which are communicated with the side wall of the piston cavity.
3. The lower core-pulling piston mold structure according to claim 2, wherein: and a pouring cavity is arranged at the joint of the upper pouring section and the piston cavity.
4. The lower core-pulling piston mold structure according to claim 2, wherein: and an air cooling hole is formed above the piston cavity and at one side of the upper casting section.
5. The lower core-pulling piston mold structure according to claim 1, wherein: the die body is internally provided with two symmetrically arranged piston cavities.
6. The lower core-pulling piston mold structure according to claim 1, wherein: the runner is internally provided with a filter screen placement area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223205076.7U CN218891164U (en) | 2022-11-30 | 2022-11-30 | Lower core-pulling piston mold structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223205076.7U CN218891164U (en) | 2022-11-30 | 2022-11-30 | Lower core-pulling piston mold structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218891164U true CN218891164U (en) | 2023-04-21 |
Family
ID=85997973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223205076.7U Active CN218891164U (en) | 2022-11-30 | 2022-11-30 | Lower core-pulling piston mold structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218891164U (en) |
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2022
- 2022-11-30 CN CN202223205076.7U patent/CN218891164U/en active Active
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