CN212070323U - 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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- CN212070323U CN212070323U CN202020555625.5U CN202020555625U CN212070323U CN 212070323 U CN212070323 U CN 212070323U CN 202020555625 U CN202020555625 U CN 202020555625U CN 212070323 U CN212070323 U CN 212070323U
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Abstract
The utility model discloses a sand covered iron mold process space leap type gating system, water including pouring basin, sprue and bridging, the bridging is watered including half arch bridge passageway, cross gate and rising head, and the sprue top is connected to pouring basin bottom, and half arch bridge passageway one end is connected respectively at sprue bottom both ends, and two halves arch bridge passageway constitute the arch bridge passageway, and cross gate one side is connected respectively to two halves arch bridge passageway other ends, and the rising head is connected respectively at the cross gate both ends, waters in every rising head one side or both sides connection. 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 utility model relates to a casting technical field, concretely relates to sand lined metal mold process space leap-over type gating system.
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.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides an iron mold sand lined process space stridees across formula the gating system, and concrete scheme is as follows:
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 advantages of the utility model
1. The utility model discloses a sand lined metal mold process space leap-over type gating system, under sand lined metal mold casting process, be applicable to the production of long and thin, the structure is complicated, the size is little, the little product foundry goods of weight of product shape.
2. Adopt the utility model discloses a sand lined metal mold process space stridees across formula gating system, every set of gating system can pour a case of product foundry goods at every turn, this space stridees across formula gating system's single case product foundry goods mould adopts the overall arrangement of bridging design, the passageway is placed in the space that enables arch bridge passageway below increase product foundry goods mould, thereby can increase the ingate on the rising head towards one side of bridging the passageway, the mode that product foundry goods mould was strideed across to the arch bridge passageway is compared with prior art, the output that makes single case product foundry goods improves 1.5 ~ 2 times, thereby production efficiency has been improved.
3. Adopt the utility model discloses a sand lined metal mold process space leap-over type gating system, the product foundry goods yield of obtaining is higher than prior art's product foundry goods yield.
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 for sand lined metal mold process space of the present invention.
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 with reference to the accompanying drawings and specific embodiments, and it should be noted that the specific 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. The utility model discloses in through the mode of space strideing across, make the output of the small-size bent axle of single case improve 1.5-2 times than the output of prior art, production efficiency has obtained great improvement.
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 (6)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020555625.5U CN212070323U (en) | 2020-04-15 | 2020-04-15 | Iron mold sand-lined process space crossing type pouring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020555625.5U CN212070323U (en) | 2020-04-15 | 2020-04-15 | Iron mold sand-lined process space crossing type pouring system |
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| Publication Number | Publication Date |
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| CN212070323U true CN212070323U (en) | 2020-12-04 |
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| CN202020555625.5U Active CN212070323U (en) | 2020-04-15 | 2020-04-15 | Iron mold sand-lined process space crossing type pouring system |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 537005 Potang Industrial Park, Yuzhou District, Yulin City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Yuchai Foundry Co.,Ltd. Address before: 537005 Potang Industrial Park, Yuzhou District, Yulin City, Guangxi Zhuang Autonomous Region Patentee before: GUANGXI YUCHAI MACHINERY PARTS MANUFACTURING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |