CN111318649A - Iron mold sand-lined process space crossing type pouring system - Google Patents
Iron mold sand-lined process space crossing type pouring system Download PDFInfo
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- CN111318649A CN111318649A CN202010296028.XA CN202010296028A CN111318649A CN 111318649 A CN111318649 A CN 111318649A CN 202010296028 A CN202010296028 A CN 202010296028A CN 111318649 A CN111318649 A CN 111318649A
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- arch bridge
- sprue
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/068—Semi-permanent moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/086—Filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
Abstract
The iron mold sand-lined process space crossing type pouring system comprises a pouring cup, a sprue and a bridging sprue, wherein the bridging sprue comprises a semi-arch bridge channel, a cross gate and risers, the bottom of the pouring cup is connected with the top of the sprue, two ends of the bottom of the sprue are respectively connected with one end of the semi-arch bridge channel, the two semi-arch bridge channels form an arch bridge channel, the other ends of the two semi-arch bridge channels are respectively connected with one side of the cross gate, two ends of the cross gate are respectively connected with the risers, and one side or two sides of each riser are connected with an ingate. Molten iron is introduced into the arch bridge channel through the pouring cup and the sprue, flows through the slag collecting ladle, the filter screen, the cross gate and the riser in sequence, and is injected into a product casting mold through the ingate. This gating system can increase the space of product foundry goods mould and place the passageway, makes the product foundry goods volume of single case output improve 1.5 ~ 2 times, and production efficiency is high, and the yield is high, and stable quality, convenient operation is fit for promoting.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a spatial crossing type pouring system for an iron mold sand-lined process.
Background
The engine crankshaft material mainly comprises forged steel and nodular cast iron.
Compared with the traditional forged steel crankshaft, the nodular cast iron crankshaft has the advantages of simple and convenient manufacture and low cost and has shock absorption and wear resistance. The fatigue strength of the nodular cast iron crankshaft in the torsional and bending fatigue stress states can reach or even exceed that of a forged steel crankshaft through alloying, reasonable spheroidization, inoculation and the like.
The company is a leading person in the production of high-grade nodular cast iron crankshafts in China at present, 300 million crankshafts are produced by using a patent number QT800-6 since 2000, the weight of a small crankshaft is 10 to 540Kg, and covered engines are from gasoline engines, light diesel engines to heavy marine diesel engines. The crankshaft is produced by using an iron mold sand-lined process in the casting process, the casting mold has high strength and compactness, and the iron mold sand box (cast iron) is arranged outside the crankshaft, so that the strength and the rigidity are high, and the high dimensional precision, the compact structure and the self-feeding strength of the casting are ensured. Meanwhile, as the sand-coated layer is thin and the iron mold has good heat conduction, the molten iron is cooled quickly after being poured, the crystal grains are fine, and the performance of the small crankshaft is improved.
When designing a new crankshaft, the prior art scheme usually uses a common closed straight-through gating system, which comprises a pouring cup, a straight pouring channel, a cross pouring channel and an inner pouring channel, and the design scheme of the gating system is only suitable for most crankshaft sizes produced on the current production line.
However, for the crankshaft for the new gasoline engine with the small crankshaft size and the small weight, if the casting system design of the prior art scheme is adopted, the yield is low, the utilization area of the iron mold is small, and therefore the problems that the iron mold temperature cannot meet the process requirement, the energy consumption is wasted due to independent heating, the production beat is increased, the output efficiency is affected and the like are caused.
Disclosure of Invention
Aiming at the technical problem, the invention provides a spatial crossing type pouring system for an iron mold sand-lined process, which has the following specific scheme:
iron mold sand-lined process space crossing type pouring system comprises a sprue cup, a sprue and a bridging runner, wherein the bridging runner comprises a semi-arch bridge channel, a cross runner and risers, the bottom of the sprue cup is connected with the top of the sprue, two ends of the bottom of the sprue are respectively connected with one end of the semi-arch bridge channel, two semi-arch bridge channels form an arch bridge channel, the other ends of the two semi-arch bridge channels are respectively connected with one side of the cross runner, two ends of the cross runner are respectively connected with the risers, and one side or two sides of each riser are connected with an ingate.
Furthermore, the bridging pouring gate also comprises a slag collecting bag, the slag collecting bag is connected with the cross pouring gate and is arranged between the two risers, and one side of the slag collecting bag is connected with the arch bridge channel.
Furthermore, a filter screen is arranged below the slag collecting bag.
Further, the top of the riser is concave.
And further, the device comprises product casting molds, wherein the product casting molds are respectively arranged on the outer sides of the two cross runners and between the inner sides of the two cross runners through the lower part of the arch bridge channel and are respectively connected with the ingates.
The device further comprises a metallographic specimen container and an attached casting test block container, wherein the metallographic specimen container and the attached casting test block container are respectively connected with one end of each cross pouring channel or any product casting mould.
The pouring method adopting the iron mold sand-lined process space crossing type pouring system comprises the following steps:
(1) molten iron is introduced into an arch bridge channel through a sprue cup and a sprue, filtered through a slag collecting ladle and a filter screen, sequentially flows into a cross runner and a riser, is injected into a product casting mold through an ingate, and is injected into a metallographic sample container and an attached casting test block container through one end of two cross runners or any two product casting molds;
(2) and (3) after pouring is finished, respectively taking out the product casting sampling piece in the metallographic sample piece container in the step (1) for metallographic detection, and taking out the product casting sampling piece in the attached casting sample piece container for mechanical property detection.
THE ADVANTAGES OF THE PRESENT INVENTION
1. The spatial crossing type gating system for the sand lined metal mold process is suitable for producing product castings with long and thin product shapes, complex structures, small sizes and small weights under the sand lined metal mold casting process.
2. By adopting the spatial crossing type pouring system for the sand-lined metal mold process, each pouring system can pour one box of product casting at a time, the single box of product casting mold of the spatial crossing type pouring system adopts the layout of a bridging design, the spatial placement channel of the product casting mold can be added below the arch bridge channel, so that an ingate can be added on one side of the riser facing the bridging channel, and the output of the single box of product casting is improved by 1.5-2 times by the mode that the arch bridge channel crosses the product casting mold compared with the prior art, thereby improving the production efficiency.
3. By adopting the spatial crossing type gating system for the sand lined iron mold process, the yield of the obtained product casting is higher than that of the product casting in the prior art.
4. The heat released in the molten iron solidification process for pouring the single-box product casting by the sand-lined metal mold process space crossing type pouring system can heat the metal mold to meet the process temperature requirement, the metal mold does not need to be additionally heated, the energy consumption is saved, and the production rhythm of a production line is kept.
5. Through theoretical calculation and analog simulation analysis calculation, the slag collecting capacity is high, the feeding function is considered, the rejection rate is controlled within 1%, and the quality of the product casting is improved.
6. The iron mold sand-lined process space crossing type pouring system is high in production efficiency, high in product casting yield, stable in quality, simple to manufacture, convenient to operate and suitable for popularization.
Drawings
FIG. 1 is a schematic structural diagram of the crossing type gating system of the sand lined metal mold process space.
Fig. 2 is a state diagram of fig. 1.
In the figure:
1: a pouring cup; 2. a sprue; 3: a semi-arch bridge tunnel; 4: a cross gate; 5: collecting a slag ladle; 6: a riser; 7: a filter screen; 8: an inner pouring channel; 9: a metallographic specimen container; 10: a casting attached test block container; 11: a small crankshaft mold.
Detailed Description
The present invention is further explained below with reference to the accompanying drawings and specific embodiments, which should be noted that the present embodiments are not intended to limit the scope of the present invention. As shown in fig. 1 and fig. 2, taking the production of a single-box small crankshaft as an example, the present embodiment provides an iron mold sand-lined process space crossing type pouring system suitable for the production of a single-box small crankshaft, which comprises a sprue cup 1, a sprue 2, a bridging runner, a metallographic specimen container 9, an attached casting specimen container 10 and a small crankshaft mold 11, wherein the bridging runner comprises a semi-arch bridge channel 3, a slag collecting ladle 5, a cross runner 4 and a riser 6, the two semi-arch bridge channels 3 form an arch bridge channel, the bottom of the sprue cup 1 is communicated with the top of the sprue 2, two ends of the bottom of the sprue 2 are respectively communicated with one end of the semi-arch bridge channel 3, the other ends of the two semi-arch bridge channels 3 are respectively connected with one side of the cross runner 4, two ends of the cross runner 4 are respectively connected with the riser 6, the top of the riser 6 is concave, preferably, the other ends of the two semi-arch bridge channels 3 are respectively connected with one side of the slag collecting ladle 5, and is arranged between the two risers 6, and one side or two sides of each riser 6 are provided with ingates 8.
The small crankshaft molds 11 are respectively arranged on the outer sides of the two cross runners 4 and between the inner sides of the two cross runners 4 and penetrate through the lower part of the arch bridge channel 3, and are respectively connected with the ingates 8. The metallographic specimen container 9 and the casting attached test block container 10 are respectively connected with one end of the cross runner 4 or any two small crankshaft molds 11.
The semi-arch bridge channel 3 has the function of increasing the placing space of the small crankshaft mold 11 below the semi-arch bridge channel 3, so that the ingate 8 can be added at the side of the riser 6 facing the bridge channel, and the production of the single-box small crankshaft is improved.
The slag collecting bag 5 is used for collecting the scum contained in the molten iron at the position.
The purpose of the riser 6 is to further collect dross contained in the molten iron; and secondly, the molten iron is fed into the small crankshaft mold 11 from the horizontal pouring gate 4, after the molten iron is poured, the molten iron fills the inner cavity of the whole small crankshaft mold 11, a hole or a pit is formed by local shrinkage in the molten iron solidification molding process, and the riser 6 conveys the molten iron in the riser 6 to the small crankshaft mold 11 through pressure difference.
The metallographic specimen container 9 is used for containing the poured small crankshaft sampling part and sending the small crankshaft sampling part to be subjected to metallographic examination.
The purpose of the attached casting test block container 10 is to contain a poured small crankshaft sampling piece and send the small crankshaft sampling piece to be tested for mechanical property.
The working principle is as follows:
as shown in fig. 1, small crankshaft molds 11 are respectively placed between the outer sides of the two runners 4 and the inner sides of the two runners 4 below the arch bridge passage, and are respectively connected to the gates 8.
Pouring in molten iron from pouring basin 1, 3 flow direction collection cinder ladles 5 of arch bridge passageway are introduced through sprue 2, flow through cross gate 4 and rising head 6 in proper order after filtering through collection cinder ladles 5 and filter screen 7, pour into small-size bent axle mould 11 through ingate 8 in, pour into respectively through two cross gate 4 one end ends or arbitrary two small-size bent axle moulds 11 in metallographic specimen container 9 and attach the casting test block container 10, send the small-size bent axle sample piece in the metallographic specimen container 9 to do the metallographic examination, send the small-size bent axle sample piece in attaching the casting test block container 10 to do the mechanical properties inspection.
The pouring method adopting the iron mold sand-lined process space crossing type pouring system comprises the following steps:
(1) molten iron is introduced into an arch bridge channel through a sprue cup 1 and a sprue 2, filtered through a slag collecting ladle 5 and a filter screen 7, sequentially flows into a cross gate 4 and a riser 6, is injected into a small crankshaft mold 11 through an ingate 8, and is respectively injected into a metallographic sample container 9 and an attached casting test block container 10 through one end of each of two cross gates 4 or any two small crankshaft molds 11;
(2) and (3) after pouring is finished, respectively taking out the small crankshaft sampling piece in the metallographic sampling piece container 9 in the step (1) for metallographic detection, and taking out the small crankshaft sampling piece in the attached casting test block container 10 for mechanical property detection.
The crossing type gating system of this embodiment compares with the gating system in the prior art, as shown in fig. 2, the gating system of this embodiment mainly carries out the molten iron reposition of redundant personnel with the molten iron from pouring cup 1 through sprue 2 through bridging the runner, can place the passageway in the space that increases small-size bent axle mould 11 below the arch bridge passageway, thereby can increase the quantity of ingate 8 on rising head 6 orientation arch bridge passageway one side, it improves to six small-size bent axles of single case by the single case four small-size bent axles among the prior art to have realized that the single case pouring of every set of gating system is improved to single case six, output has improved 1.5 times, output efficiency is high, the small-size bent axle yield has improved 15%.
Except for the embodiment shown in the example, since the prior art has no arch bridge passage, the molten iron directly flows to the runner 4 through the sprue 2 and is injected into the small crankshaft mold 11 through the ingate 8 on the runner 4, and thus the small crankshaft throughput of each casting system in the prior art is low. In the invention, the production capacity of the single-box small crankshaft is improved by 1.5-2 times than that of the prior art by a space crossing mode, and the production efficiency is greatly improved.
The single-box throughput, yield and rejection rate of the prior art gating system and the gating system of this example are compared as shown in table 1 below:
table 1:
| name (R) | Number of products produced in a single tank | Yield of finished products | Rejection rate |
| Gating system of the |
4 pieces | About 65 percent | 1.5-2％ |
| Pouring system of the |
6 pieces | About 80 percent | About 1% |
| Yield improvement contrast ratio | 50％ | 15％ |
The yield calculation mode is as follows: the yield rate is (weight of single box product/weight of single box pouring molten iron) 100%.
Claims (7)
1. The iron mold sand-lined process space crossing type pouring system is characterized by comprising a pouring cup, a sprue and a bridging runner, wherein the bridging runner comprises a semi-arch bridge channel, a cross runner and risers, the bottom of the pouring cup is connected with the top of the sprue, two ends of the bottom of the sprue are respectively connected with one end of the semi-arch bridge channel, the two semi-arch bridge channels form an arch bridge channel, the other ends of the two semi-arch bridge channels are respectively connected with one side of the cross runner, two ends of the cross runner are respectively connected with the risers, and one side or two sides of each riser are connected with an ingate.
2. The sand lined metal mold process space-spanning gating system of claim 1, wherein the bridging runner further comprises a slag trap connected to the runner and disposed between two risers, one side of which is connected to the arch bridge channel.
3. The sand lined metal mold process space spanned gating system of claim 2, wherein a filter screen is provided below the slag collection ladle.
4. The sand lined metal mold process space-spanning gating system of claim 1, wherein the riser top is concave.
5. The sand lined metal mold process space-spanning gating system of claim 1, comprising product casting molds disposed respectively outside the two runners and between the insides of the two runners below the arch bridge passage and connected respectively to the ingates.
6. The sand lined metal mold process space-spanning gating system according to claim 5, which comprises a metallographic specimen container and an attached casting test block container, wherein the metallographic specimen container and the attached casting test block container are respectively connected with one end of each cross runner or any one product casting mold.
7. The pouring method using the sand lined metal mold process space crossing type gating system according to any one of claims 1 to 6, comprising the steps of:
(1) molten iron is introduced into an arch bridge channel through a sprue cup and a sprue, filtered through a slag collecting ladle and a filter screen, sequentially flows into a cross gate and a riser, is injected into a product casting mold through an ingate, and is respectively injected into a metallographic sample container and an attached casting test block container through one end of two cross gates or any two product casting molds;
(2) and (3) after pouring is finished, respectively taking out the product casting sampling piece in the metallographic sample piece container in the step (1) for metallographic detection, and taking out the product casting sampling piece in the attached casting sample piece container for mechanical property detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010296028.XA CN111318649A (en) | 2020-04-15 | 2020-04-15 | Iron mold sand-lined process space crossing type pouring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010296028.XA CN111318649A (en) | 2020-04-15 | 2020-04-15 | Iron mold sand-lined process space crossing type pouring system |
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| CN202010296028.XA Pending CN111318649A (en) | 2020-04-15 | 2020-04-15 | Iron mold sand-lined process space crossing type pouring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828729A (en) * | 2021-09-16 | 2021-12-24 | 江苏金诺炉辊有限公司 | High-temperature alloy supporting tube investment casting mold and pouring process thereof |
| CN114042871A (en) * | 2021-11-12 | 2022-02-15 | 中车戚墅堰机车有限公司 | Gating system with compensation and deformation prevention effects |
| CN114799067A (en) * | 2022-05-09 | 2022-07-29 | 安徽省恒泰动力科技有限公司 | Aluminum piston mold with one-mold double-cavity casting structure |
-
2020
- 2020-04-15 CN CN202010296028.XA patent/CN111318649A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828729A (en) * | 2021-09-16 | 2021-12-24 | 江苏金诺炉辊有限公司 | High-temperature alloy supporting tube investment casting mold and pouring process thereof |
| CN114042871A (en) * | 2021-11-12 | 2022-02-15 | 中车戚墅堰机车有限公司 | Gating system with compensation and deformation prevention effects |
| CN114799067A (en) * | 2022-05-09 | 2022-07-29 | 安徽省恒泰动力科技有限公司 | Aluminum piston mold with one-mold double-cavity casting structure |
| CN114799067B (en) * | 2022-05-09 | 2023-10-03 | 安徽省恒泰动力科技有限公司 | Aluminum piston mold with one-mold double-cavity casting structure |
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Address after: 537005 Potang Industrial Park, Yuzhou District, Yulin City, Guangxi Zhuang Autonomous Region Applicant after: Guangxi Yuchai Foundry Co.,Ltd. Address before: 537005 Potang Industrial Park, Yuzhou District, Yulin City, Guangxi Zhuang Autonomous Region Applicant before: GUANGXI YUCHAI MACHINERY PARTS MANUFACTURING Co.,Ltd. |