CN213613956U - Casting mold and casting - Google Patents
Casting mold and casting Download PDFInfo
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- CN213613956U CN213613956U CN202022368645.4U CN202022368645U CN213613956U CN 213613956 U CN213613956 U CN 213613956U CN 202022368645 U CN202022368645 U CN 202022368645U CN 213613956 U CN213613956 U CN 213613956U
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Abstract
The utility model discloses a casting mould and foundry goods, it belongs to casting device technical field, include: the sand mould forms a cavity, and an air outlet riser which penetrates through the sand mould and is communicated with the highest local position of the cavity is arranged on the sand mould; the sand core is arranged in the cavity; the casting pipeline is used for communicating the outside of the sand mold with the cavity and is provided with a bottom pouring gate and a baking pouring gate, the bottom pouring gate is communicated with the bottom surface of the cavity, and the baking pouring gate is communicated with the side surface or the top surface of the cavity; the utility model discloses a toast the molten iron that the runner introduced the die cavity and toast the psammitolite, make most gas in the sand core receive promptly to toast the escape die cavity before the molten iron covers the psammitolite, the effectual problem that the gas pocket appears in the upper surface that has prevented the foundry goods.
Description
Technical Field
The utility model relates to a casting technical field, concretely relates to casting mould and foundry goods.
Background
In the past, the upper surface of a casting is easy to generate escaping casting pores, so that the appearance of the casting is poor for light parts, and the casting is scrapped for heavy parts. The problem occurs mainly because the alcohol of the coating in the sand core enters the sand core, the alcohol infiltrated into the sand core under the baking of molten iron becomes gas to escape from the sand core, and the gas enters the casting to cause the air holes of the casting. In order to solve this problem, the existing commonly used methods include: baking the sand core and the sand mold, obliquely casting the sand box, improving the casting temperature, shortening the casting time and the like. Although the above method can reduce the problem of the blowholes of the fugitive casting to some extent, it cannot fundamentally eliminate the problem.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a casting mould can introduce partial molten iron through toasting the pouring gate and toast the psammitolite, makes most gas in the psammitolite receive promptly before the molten iron covers the psammitolite and toasts the die cavity of escaping, the effectual problem that the gas pocket appears in the upper surface that has prevented the foundry goods.
The utility model also provides a foundry goods adopts aforementioned casting mould casting to form, and the gas pocket can not appear in the upper surface, has guaranteed product quality.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
in one aspect, the utility model provides a casting mold, include: the sand mould forms a cavity, and an air outlet riser which penetrates through the sand mould and is communicated with the highest local position of the cavity is arranged on the sand mould; the sand core is arranged in the cavity; the casting pipeline is used for communicating the outside of the sand mold with the cavity and is provided with a bottom pouring gate and a baking pouring gate, the bottom pouring gate is communicated with the bottom surface of the cavity, and the baking pouring gate is communicated with the side surface or the top surface of the cavity.
As a preferable technical scheme, the sand mold comprises an upper sand mold and a lower sand mold, and the baking runner is arranged at a parting surface between the upper sand mold and the lower sand mold.
As a preferred technical scheme, an air outlet duct is arranged between the sand core and the sand mold, one end of the air outlet duct extends into the core head of the sand core, and the other end of the air outlet duct is communicated with the outside of the sand mold.
As a preferred technical scheme, the casting pipeline comprises a sprue, a cross gate and an inner gate which are sequentially communicated, one end of the sprue is communicated with the outside of the sand mold, and the bottom gate and the baking gate are respectively communicated with the cross gate to form the inner gate.
As a preferable technical scheme, the sprue is vertically arranged, the cross runner is horizontally arranged, and a buffer nest is arranged at the lower end of the communication part of the sprue and the cross runner.
As a preferable technical solution, a connecting pipeline is arranged between the horizontal runner and the ingate for communication, the connecting pipeline is one or more, and each connecting pipeline is communicated with one bottom runner and/or one baking runner.
As a preferable technical scheme, a filter plate is arranged in the cross runner.
As a preferable technical proposal, the ratio of the cross-sectional areas of the roasting pouring channel and the bottom pouring channel is 1: 7-9.
In a preferred embodiment, a cross-sectional area ratio of the sprue, the runner, the connecting duct, and the ingate is 1:1.9:0.7: 0.64.
In a second aspect, the present invention provides a casting obtained by casting the aforementioned mold.
The utility model has the advantages of that:
1. the utility model discloses a toast the molten iron that the runner introduced the die cavity and toast the psammitolite, make most gas in the sand core receive promptly to toast the escape die cavity before the molten iron covers the psammitolite, the effectual problem that the gas pocket appears in the upper surface that has prevented the foundry goods.
2. The utility model introduces the molten iron from the bottom of the cavity through the bottom runner, so that the molten iron can stably enter the cavity, the molten iron is prevented from scouring sand cores and sand molds, and the sand inclusion phenomenon of castings is avoided; meanwhile, impurities in molten iron can easily float to unimportant positions of the top casting from the bottom, and the quality of important surfaces of the casting is guaranteed.
3. The utility model discloses a toast and water can directly locate die joint department, and the processing of being convenient for can not increase the casting mould cost, simultaneously, flows down along the die cavity wall from toasting the molten iron that waters the inflow die cavity, can be to the even stoving of psammitolite.
4. The utility model discloses a toast and water the molten iron that flows in the die cavity and only account for a small part of the molten iron total amount that flows in the die cavity, can avoid a large amount of molten irons from toasting and water the introduction die cavity and cause the impact to the sand mould.
Drawings
FIG. 1 is a schematic view of the overall structure of an embodiment of a casting mold according to the present invention;
FIG. 2 is a top view of FIG. 1 with the sand mold hidden;
fig. 3 is a bottom view of fig. 1 with the sand mold hidden.
In the figure: 1-sand mould, 11-air outlet riser, 12-upper sand mould, 13-lower sand mould, 14-parting surface, 15-air outlet duct, 2-sand core, 3-casting pipeline, 31-bottom runner, 32-baking runner, 33-sprue, 34-cross runner, 35-buffer nest, 36-connecting pipeline and 37-filter plate.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
In a first aspect, please refer to fig. 1 to fig. 3, which are examples of a casting mold provided by the present invention, including: the method comprises the following steps that (1) a sand mould 1 forms a cavity, the sand mould 1 is provided with an air outlet riser 11 which penetrates through the sand mould 1 and is communicated with the highest local position of the cavity, when molten iron enters the cavity, air in the cavity can be continuously discharged through the air outlet riser 11, and meanwhile, the air outlet riser 11 also has a feeding effect; the sand core 2 is arranged in the cavity and used for forming a hole or an inner cavity of a casting; the casting pipeline 3, the casting pipeline 3 communicates the outside of the sand mould 1 with the cavity, the casting pipeline 3 has a bottom runner 31 and a baking runner 32, the bottom runner 31 communicates with the bottom surface of the cavity, the baking runner 32 communicates with the side surface or the top surface of the cavity, molten iron flows into the cavity along the casting pipeline 3, the molten iron flowing in along the bottom runner 31 smoothly enters from the bottom of the cavity, the molten iron flowing in along the baking runner 32 enters the cavity from the side part or the upper part of the cavity, the sand core 2 can be baked, and most of gas in the sand core 2 is baked to escape from the cavity before the molten iron covers the sand core 2.
Please refer to fig. 1, a sand mold box is usually arranged outside the sand mold 1 to fix and mold the sand mold 1; a feed hopper or a feed chute for facilitating the introduction of the molten iron into the casting pipe 3 is generally provided at an outer mouth of the casting pipe 3.
In this embodiment, please refer to fig. 1, the sand mold 1 includes an upper sand mold 12 and a lower sand mold 13, the baking runners 32 are disposed at the parting surface 14 between the upper sand mold 12 and the lower sand mold 13, which is convenient for processing, and does not increase the cost of the casting mold, and meanwhile, the property that the parting surface 14 is distributed along the circumferential direction of the cavity can be utilized, the baking runners 32 can be provided in multiple strips and are horizontally distributed along the circumferential direction of the cavity at the parting surface 14, so that molten iron entering from the baking runners 32 can uniformly heat the cavity and the sand core 2 in the cavity, and the baking effect on the sand core 2 is improved, specifically, the baking runners 32 can be directly formed by the parting surface 14, or can be independently provided pipelines; in other embodiments, the bake gate 32 may also be a pipe disposed at a non-molding surface of the sand mold 1, and the specific position and structure of the bake gate 32 are subject to ensure the baking effect on the sand core 2.
In this embodiment, referring to fig. 1 and fig. 2, an air outlet duct 15 is provided between the sand core 2 and the sand mold 1, one end of the air outlet duct 15 extends into the core head of the sand core 2, and the other end of the air outlet duct 15 is communicated with the outside of the sand mold 1, so that when the sand core 2 is coated with molten iron, the gas in the sand core 2 can be discharged through the air outlet duct 15, and the choking of the casting is avoided.
In this embodiment, referring to fig. 1-3, the casting pipe 3 includes a sprue 33, a runner 34 and an ingate which are sequentially communicated, one end of the sprue 33 is communicated with the exterior of the sand mold 1, the bottom runner 31 and the bake runner 32 are respectively communicated with the runner 34 to form the ingate, molten iron flows into the cavity along the sprue 33, the runner 34 and the ingate, the molten iron is divided at the bottom runner 31 and the bake runner 32, a part of the molten iron flows from the bottom of the cavity along the bottom runner 31, a part of the molten iron flows from the side or upper portion of the cavity along the bake runner 32, and the bottom runner 31 is preferably made of a ceramic tube.
On the basis of the above embodiment, referring to fig. 1-3, the sprue 33 is vertically arranged, the runner 34 is horizontally arranged, and the lower end of the communication part between the sprue 33 and the runner 34 is provided with the buffer socket 35, so that when the runner 34 is directly molded by the sand mold 1, the buffer socket 35 can effectively reduce the impact of molten iron in the sprue 33 on the sand mold 1; specifically, the sprue 33 is preferably a ceramic tube, the runners 34 are symmetrically arranged along the axial direction of the sprue 33, the cross section of each runner 34 is trapezoidal or a part of the cross section is trapezoidal, and the runners 34 can effectively store molten iron and float impurities in the molten iron, and are convenient to manufacture and mold.
On the basis of the above embodiments, please refer to fig. 1-3, a connecting pipeline 36 is arranged between the horizontal runner 34 and the ingate for communication, the connecting pipeline 36 is one or more, each connecting pipeline 36 is communicated with one bottom runner 31 and/or one baking runner 32, and by arranging the connecting pipelines 36, the molten iron in the horizontal runner 34 can be simultaneously introduced into the bottom runners 31 and the baking runners 32, so that the molten iron can enter from various positions of the cavity more uniformly, the molten iron is prevented from scouring the sand cores 2 and the sand molds 1, and the baking effect on the sand cores 2 is also improved. Specifically, in this embodiment, the number of the connecting pipes 36 is 4, the number of the bottom runners 31 is 4, the number of the baking runners 32 is 2, each connecting pipe 36 is respectively communicated with one bottom runner 31, and each two connecting pipes 36 are respectively communicated with one baking runner 32; the number of the connecting pipelines 36, the bottom pouring gate 31, the baking pouring gate 32 and the specific connection mode of the connecting pipelines 36 with the bottom pouring gate 31 and the baking pouring gate 32 respectively are determined according to the actual condition of the casting mold so as to ensure that molten iron can stably enter a cavity and bake the sand core 2; furthermore, the connecting pipes 36 should be communicated with the middle of the side surface of the runner 34, so that impurities on the upper layer of the molten iron liquid level in the runner 34 can be effectively prevented from entering the connecting pipes 36, and a plurality of connecting pipes 36 can be ensured to flow into the molten iron at the same time, thereby improving the stability of the molten iron entering the cavity.
In addition to the above embodiments, referring to fig. 1, a filter 37 is disposed in the runner 34, and the filter 37 is used for filtering the molten iron in the runner 34 to reduce the content of impurities in the molten iron entering the ingate. Furthermore, a filter sheet 37 matched with the buffer nest 35 in shape is arranged at the position corresponding to the buffer nest 35, so that a certain buffer effect can be achieved while the filter effect is ensured.
In this embodiment, the ratio of the cross-sectional areas of the bake runner 32 and the bottom runner 31 is 1:7-9, preferably, the ratio of the cross-sectional areas of the bake runner 32 and the bottom runner 31 is 1:8, so that a larger part of molten iron entering the cavity smoothly enters through the bottom runner 31, and the remaining part of molten iron entering through the bake runner 32 is enough to bake the sand core 2, therefore, the ratio of the cross-sectional areas of the bake runner 32 and the bottom runner 31 mainly depends on the required amount of molten iron for baking the sand core 2 in actual casting, that is, the amount of molten iron flowing into the cavity from the bake runner 32 is enough to bake the sand core 2, and the remaining molten iron should flow in through the bottom runner 31.
In the embodiment, the cross-sectional area ratio of the sprue 33, the cross runner 34, the connecting pipeline 36 and the ingate is 1:1.9:0.7:0.64, and during casting, the cross-sectional area ratio can ensure that the cross runner 34 is always in a full state, so that impurities in molten iron float on the upper side of the cross runner 34, the impurities are prevented from entering a cavity through the filter sheet 37, and no external gas enters the connecting pipeline 36 and the ingate; further, through a plurality of experiments, the cross-sectional area ratio of the roasting runner 32 and the bottom runner 31 in the inner runner can be set to be 1:7, so as to ensure the optimal ratio of no air holes in the castings.
In a second aspect, the present invention provides a casting obtained by casting the aforementioned mold.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A mold, comprising:
the sand mould forms a cavity, and an air outlet riser which penetrates through the sand mould and is communicated with the highest local position of the cavity is arranged on the sand mould;
the sand core is arranged in the cavity;
the casting pipeline is used for communicating the outside of the sand mold with the cavity and is provided with a bottom pouring gate and a baking pouring gate, the bottom pouring gate is communicated with the bottom surface of the cavity, and the baking pouring gate is communicated with the side surface or the top surface of the cavity.
2. The mold according to claim 1, wherein said sand molds comprise an upper sand mold and a lower sand mold, said bake runner being provided at a parting plane between said upper sand mold and said lower sand mold.
3. The casting mold according to claim 1, wherein an air outlet duct is arranged between the sand core and the sand mold, one end of the air outlet duct extends into a core head of the sand core, and the other end of the air outlet duct is communicated with the outside of the sand mold.
4. The mold according to claim 1, wherein the pouring duct comprises a sprue, a runner and an ingate which are communicated in sequence, one end of the sprue is communicated with the outside of the sand mold, and the bottom runner and the baking runner are respectively communicated with the runner to form the ingate.
5. The mold according to claim 4, wherein the sprue is vertically arranged, the runner is horizontally arranged, and a buffer socket is arranged at the lower end of the communication part of the sprue and the runner.
6. A mould as claimed in claim 4, wherein connecting conduits are provided for communication between the cross runner and the ingate, the connecting conduits being provided in one or more pluralities, each of the connecting conduits being in communication with one of the bottom runners and/or one of the bake runners.
7. The mould as claimed in any one of claims 4 to 6, wherein a filter plate is provided in the runner.
8. The mold according to claim 1 or 4, wherein the ratio of the cross-sectional area of said bake runner and said bottom runner is 1: 7-9.
9. The mold of claim 6, wherein the cross-sectional area ratio of the sprue, the runner, the connecting conduit, and the ingate is 1:1.9:0.7: 0.64.
10. Casting obtained by casting with the mold according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022368645.4U CN213613956U (en) | 2020-10-22 | 2020-10-22 | Casting mold and casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022368645.4U CN213613956U (en) | 2020-10-22 | 2020-10-22 | Casting mold and casting |
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| Publication Number | Publication Date |
|---|---|
| CN213613956U true CN213613956U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022368645.4U Active CN213613956U (en) | 2020-10-22 | 2020-10-22 | Casting mold and casting |
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| CN (1) | CN213613956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346168A (en) * | 2022-01-26 | 2022-04-15 | 甘肃酒钢集团西部重工股份有限公司 | Casting mold and casting method for heat-resistant cast iron cooling wall |
-
2020
- 2020-10-22 CN CN202022368645.4U patent/CN213613956U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346168A (en) * | 2022-01-26 | 2022-04-15 | 甘肃酒钢集团西部重工股份有限公司 | Casting mold and casting method for heat-resistant cast iron cooling wall |
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