A casting runner filtration system
By combining the horizontal gating system, slag collection pot, and thin-plate flow channel with a ceramic filter, the molten iron slag is filtered twice, solving the problem of unstable slag content, improving casting quality and system stability, and reducing the risk of casting scrap and filter clogging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HIMILE MECHANICAL SCI & TECH (SHANDONG) CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-03
AI Technical Summary
In the existing technology, the slag content of ceramic filters is unstable during the casting process, resulting in unqualified casting quality and filter blockage. It is difficult to effectively control the slag content entering the mold cavity, which affects the casting qualification rate and service life.
The system employs a combination of a horizontal gating system, a slag collection ladle, and a thin-plate flow channel, along with a ceramic filter, to achieve two-stage slag filtration in the molten iron. This prevents slag from entering the mold and prevents slag backflow through an anti-backflow section. The optimized flow path of the molten iron ensures stable control of the slag content.
It effectively reduces slag on the inside and outside surfaces of castings, improves the casting qualification rate, reduces scrap losses, extends the service life of castings, reduces the risk of filter clogging, and improves the stability of the casting system.
Smart Images
Figure CN224444513U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of casting technology, specifically to a casting gating filtration system. Background Technology
[0002] The wind turbine gearbox is a core component of the wind turbine generator set. Its external frame is almost entirely composed of castings. The quality requirements for the internal and external surfaces of these castings are extremely strict. Internal inclusions and visible slag holes on the machined mating surfaces are not allowed, and defects cannot be removed and repaired in any other way.
[0003] At present, castings produced by sand casting usually rely on ceramic filters to filter slag from molten iron. During the pouring process, the size of the pores of the ceramic filter and the amount of slag in the molten iron are not constant, which leads to inconsistent filtering effects. The slag content of the molten iron entering the mold cavity is difficult to control, and castings are often scrapped due to slag inclusions and filter blockage.
[0004] Therefore, developing a casting gating filtration system that can stably control the slag content of molten iron entering the mold cavity, greatly reduce slag on the inside and outside of the casting, improve the casting qualification rate, and avoid filter clogging is an urgent problem to be solved at present. Summary of the Invention
[0005] To address the problems existing in the prior art, this utility model provides a casting gating filtration system. The horizontal gating, slag collection bag, and thin-plate flow channel work together to block some slag from entering the filter. At the same time, the filter can filter out slag from the molten iron. The two work together to achieve two-stage filtration and slag blocking of slag from the molten iron in the same sand mold. This effectively avoids excessive slag entering the mold due to various abnormalities, greatly reduces slag on the inside and outside surface of the casting, improves the casting qualification rate, reduces scrap losses, ensures the service life of the casting, and can prevent filter clogging.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] This utility model provides a casting runner filtration system, including:
[0008] Direct pouring;
[0009] Several horizontal pouring channels, one end of which is connected to the lower end of the vertical pouring channel, and the other end of which is connected to a slag collection bag;
[0010] A plurality of filters, wherein a thin sheet-like flow channel is provided between the upper end of the filter and the side of the horizontal runner; the height of the thin sheet-like flow channel is lower than the height of the horizontal runner, the width-to-height ratio of the thin sheet-like flow channel is ≥5:1, and the height ratio of the horizontal runner to the thin sheet-like flow channel is ≥8:1.
[0011] Several ingates are provided, one end of which is connected to the lower end of the filter, and the other end of which is connected to the mold cavity.
[0012] As a preferred technical solution, the end of the horizontal pouring channel near the slag collection bag is provided with an anti-backflow section, and the cross-sectional area of the anti-backflow section gradually decreases along the direction close to the slag collection bag.
[0013] As a preferred technical solution, the upper surface of the anti-backflow section is inclined downward along the direction close to the slag collection bag.
[0014] As a preferred technical solution, the height of the slag collection bag is higher than the height of the connection between the horizontal pouring channel and the slag collection bag.
[0015] As a preferred technical solution, the length direction of the slag collection bag is perpendicular to the length direction of the horizontal pouring channel, and the length of the slag collection bag is greater than the width of the horizontal pouring channel.
[0016] As a preferred technical solution, a plurality of the horizontal runners are distributed circumferentially along the vertical runners, the horizontal runners extend radially, and the filter is provided between two adjacent horizontal runners. The adjacent horizontal runners and the filter are connected through the sheet-like flow channel.
[0017] As a preferred technical solution, the sprue, the grate, the sheet-like flow channel, the filter, and the ingate are sequentially connected to form a flow channel for molten iron, and the sheet-like flow channel is the point with the smallest cross-sectional area of the flow channel.
[0018] As a preferred technical solution, the ratio of the cross-sectional area of the horizontal runner to the sum of the cross-sectional areas of all the sheet-like flow channels connected to it is ≥4:1.
[0019] As a preferred technical solution, the flow lines of molten iron within the thin-film flow channel are curved.
[0020] As a preferred technical solution, the ratio of the number of the horizontal runner, the filter, the sheet-like flow channel, and the ingate is 1:1:2:2;
[0021] And / or, the filter is configured as a ceramic filter.
[0022] The beneficial effects of this utility model are as follows:
[0023] 1. The horizontal runner, slag collection pot, and thin-plate flow channel of this utility model work together to block most of the slag in the horizontal runner and slag collection pot by means of flow obstruction. At the same time, the filter can further filter out the slag in the molten iron. The thin-plate flow channel, horizontal runner, and filter work together to achieve two-stage slag blocking of molten iron in the same sand mold. It can stably control the slag content of molten iron entering the mold cavity, avoid excessive slag entering the mold due to various abnormalities, improve the slag inclusion problem inside and outside the casting, greatly reduce the possibility of slag appearing inside and outside the casting, improve the casting qualification rate, reduce scrap losses, ensure the service life of the casting, and reduce the probability of filter clogging.
[0024] 2. This utility model utilizes the anti-backflow section on the horizontal pouring channel to effectively prevent molten iron containing a large amount of slag from flowing back into the horizontal pouring channel from the slag collection ladle, thereby avoiding excessive slag entering the filter.
[0025] 3. The filters of this utility model are all set between two adjacent horizontal sprues, and the filters are connected to the two horizontal sprues respectively through thin plate-shaped flow channels, so that each horizontal sprue is connected to two filters, and each filter is connected to two horizontal sprues. On the one hand, this can avoid the risk of paralyzing the entire casting system when one filter fails. On the other hand, this structure can effectively reduce the length of the horizontal sprues and effectively shorten the distance between the slag collection ladle and the straight sprue, so that the first stream of molten iron with the highest slag content can quickly enter the slag collection ladle, reducing the possibility of filter failure. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a casting gating filtration system according to the present invention;
[0027] Figure 2 for Figure 1 Top view;
[0028] Figure 3 for Figure 1 Side view of the horizontal runner in the middle;
[0029] Figure 4 for Figure 1 A schematic diagram of the thin-film flow channel structure.
[0030] In the diagram: 1-straight runner, 2-horizontal runner, 21-anti-backflow section, 3-slag collection bag, 4-filter, 5-thin sheet runner, 6-inner runner. Detailed Implementation
[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0032] Please refer to Figures 1-4 This invention provides a first embodiment of a casting runner filtration system, comprising a sprue 1, the lower end of which is connected to one end of three horizontal runners 2, and the other end of each of the three horizontal runners 2 is connected to a slag collection bag 3; the three horizontal runners 2 are distributed circumferentially around the sprue 1, each horizontal runner 2 extending radially along the sprue 1; three filters 4 are respectively spaced between the three horizontal runners 2, and thin-plate flow channels 5 are provided between adjacent filters 4 and horizontal runners 2; each filter 4 has two ingates 6 at its lower end, and the ingates 6 are connected to the mold cavity; the sprue 1, horizontal runners 2, thin-plate flow channels 5, filters 4 and ingates 6 are sequentially connected to form the flow of molten iron. The thin-plate runner 5 is located at the lowest point of the horizontal runner 2, and the height of the thin-plate runner 5 is lower than the height of the horizontal runner 2. The width-to-height ratio of the thin-plate runner 5 is ≥5:1, and the height ratio of the horizontal runner 2 to the thin-plate runner 5 is ≥8:1. The thin-plate runner 5 can block some of the slag in the molten iron from entering the filter 4. At the same time, the filter 4 can further filter out the slag in the molten iron. The thin-plate runner 5, the horizontal runner 2, and the filter 4 work together to achieve two-stage slag filtration and slag blocking of the molten iron in the same sand mold, stably controlling the slag content of the molten iron entering the mold cavity, avoiding excessive slag from entering the mold due to various abnormalities, and greatly reducing the possibility of slag appearing inside and on the outer surface of the casting.
[0033] For details, please refer to Figure 1 and Figure 2 The ratio of the number of horizontal runners 2, filters 4, sheet-like runners 5, and ingates 6 is 1:1:2:2, so that the molten iron in the sprue 1 flows evenly into the mold cavity through the six ingates 6 after passing through the horizontal runners 2, sheet-like runners 5, and filters 4 in sequence. In other embodiments, the number of horizontal runners 2, filters 4, sheet-like runners 5, and ingates 6 can also be other values, and the ratio of the number of horizontal runners 2, filters 4, sheet-like runners 5, and ingates 6 can also be a ratio, as long as a continuous flow channel can be formed to ensure that the molten iron flows stably into the mold cavity.
[0034] Furthermore, the ratio of the cross-sectional area of the horizontal runner 2 to the sum of the cross-sectional areas of all the sheet-like runners 5 connected to it is ≥4:1.
[0035] It should be noted that filter 4 is preferably a ceramic filter.
[0036] In this embodiment, please refer to Figures 1-3 The horizontal pouring channel 2 is provided with an anti-backflow section 21 at one end near the slag collection pot 3. The cross-sectional area of the anti-backflow section 21 gradually decreases along the direction near the slag collection pot 3. The anti-backflow can effectively prevent molten iron containing a large amount of slag in the slag collection pot 3 from flowing back into the horizontal pouring channel 2, thereby avoiding excessive slag from entering the filter 4.
[0037] For details, please refer to Figures 1-3 The upper surface of the anti-backflow section 21 is preferably inclined downward along the direction close to the slag collection ladle 3, which can better guide the molten iron containing slag into the slag collection ladle 3. At the same time, the height of the slag collection ladle 3 is higher than the height of the connection between the horizontal pouring channel 2 and the slag collection ladle 3. After the molten iron containing slag enters the slag collection ladle 3, it floats to the upper layer of the slag collection ladle 3 and will not flow back to the horizontal pouring channel 2. Furthermore, the length direction of the slag collection ladle 3 is preferably perpendicular to the length direction of the horizontal pouring channel 2, and the length of the slag collection ladle 3 is preferably greater than the width of the horizontal pouring channel 2, so as to ensure that the slag collection ladle 3 has a large space for storing slag and does not hinder the subsequent flow of molten iron. At the same time, the slag entering the slag collection ladle 3 stays at both ends of the slag collection ladle 3 along the flow of molten iron, further reducing the slag backflow to the horizontal pouring channel 2.
[0038] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The thin-plate flow channel 5 is curved, so that the flow line of molten iron in the thin-plate flow channel 5 is curved, so that the molten iron flows slowly into the filter 4 in the thin-plate flow channel 5, which facilitates the retention of slag in the horizontal pouring channel 2 and the slag collection pot 3; preferably, the flow line of molten iron in the thin-plate flow channel 5 is parabolic.
[0039] Furthermore, the thin-plate flow channel 5 should be the point with the smallest cross-sectional area of the flow channel. The thin-plate flow channel 5 can effectively block slag in the molten iron while ensuring that the molten iron can quickly fill the horizontal pouring channel 2. Most of the slag in the molten iron can quickly float to the top of the horizontal pouring channel 2. The height of the slag is higher than the height of the thin-plate flow channel 5, thereby blocking most of the slag in the horizontal pouring channel 2.
[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A foundry runner filtration system characterized by, include: Direct casting channel (1); Several horizontal pouring channels (2) are provided, one end of which is connected to the lower end of the vertical pouring channel (1), and the other end of which is connected to a slag collection bag (3). A plurality of filters (4) are provided, wherein a thin sheet-like flow channel (5) is provided between the upper end of the filter (4) and the side of the horizontal runner (2); the height of the thin sheet-like flow channel (5) is lower than the height of the horizontal runner (2), the width-to-height ratio of the thin sheet-like flow channel (5) is ≥5:1, and the height ratio of the horizontal runner (2) to the thin sheet-like flow channel (5) is ≥8:1; Several ingates (6), one end of which is connected to the lower end of the filter (4), and the other end of which is connected to the mold cavity.
2. A filter system for a casting sprue according to claim 1, characterized in that The horizontal pouring channel (2) is provided with an anti-backflow section (21) at one end near the slag collection bag (3), and the cross-sectional area of the anti-backflow section (21) gradually decreases along the direction near the slag collection bag (3).
3. A filter system for a casting sprue according to claim 2, characterized in that The upper surface of the anti-backflow section (21) is inclined downward along the direction close to the slag collection bag (3).
4. A filter system for a casting sprue according to claim 3, characterized in that The height of the slag collection bag (3) is higher than the height of the connection between the horizontal pouring channel (2) and the slag collection bag (3).
5. A filter system for a casting sprue according to claim 4, characterized in that The length direction of the slag collection bag (3) is perpendicular to the length direction of the horizontal pouring channel (2), and the length of the slag collection bag (3) is greater than the width of the horizontal pouring channel (2).
6. A filter system for a casting sprue according to claim 1, characterized in that Several of the horizontal runners (2) are distributed circumferentially along the straight runner (1). The horizontal runners (2) extend radially. The filter (4) is provided between two adjacent horizontal runners (2). The adjacent horizontal runners (2) and the filter (4) are connected through the sheet-like flow channel (5).
7. A filter system for a casting sprue according to claim 1, characterized in that The straight gating (1), the horizontal gating (2), the sheet-like flow channel (5), the filter (4), and the ingate (6) are connected in sequence to form a flow channel for molten iron. The sheet-like flow channel (5) is the point with the smallest cross-sectional area of the flow channel.
8. A filter system for a casting sprue according to claim 1, characterized in that The ratio of the cross-sectional area of the horizontal runner (2) to the sum of the cross-sectional areas of all the sheet-like runners (5) connected to it is ≥4:
1.
9. A filter system for a casting sprue according to claim 1, characterized in that The flow lines of molten iron within the thin-walled flow channel (5) are curved.
10. A filter system for a casting sprue according to claim 1, characterized in that The ratio of the number of the horizontal runner (2), the filter (4), the sheet-like flow channel (5), and the ingate (6) is 1:1:2:2; And / or, the filter (4) is configured as a ceramic filter.