CN104493097A - Method and mud core for improving feeding effect of open riser of iron castings - Google Patents
Method and mud core for improving feeding effect of open riser of iron castings Download PDFInfo
- Publication number
- CN104493097A CN104493097A CN201410777612.1A CN201410777612A CN104493097A CN 104493097 A CN104493097 A CN 104493097A CN 201410777612 A CN201410777612 A CN 201410777612A CN 104493097 A CN104493097 A CN 104493097A
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- CN
- China
- Prior art keywords
- mud core
- open riser
- riser
- ironcasting
- feeding effect
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a method for improving the feeding effect of an open riser of iron castings. The open riser comprises a riser body at the upper part and a riser neck at the lower part. The method is characterized by comprising the following steps: preparing a disc-shaped mud core, wherein the center of the upper part of the disc-shaped mud core is a circular truncated cone part, the lower part of the disc-shaped mud core is a disc part, the outer diameter of the disc part is greater than the diameter of the riser body, a plurality of gas outlet grooves communicated with outside are formed in the upper surface of the disc part around the circular truncated cone part; and after modeling and container allocation of the iron castings are finished, placing the mud core above the open riser in a manner that openings of the gas outlet grooves are downward to ensure that the gas outlet grooves of the mud core are communicated with the open riser, then performing hot air drying on a mould and then pouring the iron castings. The invention further discloses a mud core for improving the feeding effect of the open riser of the iron castings. Besides the purpose of enhancing the feeding effect of the open riser, the mud core has the functions of enhancing the hot air effect and preventing foreign matters from entering a cavity, has the advantages of simplicity in operation, economy, practicability, and low production cost, and is especially suitable for production of the large iron castings.
Description
Technical field
The present invention relates to and improve the method for Quality of Iron Casting, particularly a kind of method for improving ironcasting open riser feeding effect and mud core, belong to metal smelt technical field.
Background technology
The feeding of foundry goods when large-sized iron casting often adopts open riser to pour into a mould, open riser directly contacts with air, and heat radiation is very fast, and after rising head top is solidified, though its middle and lower part is still liquid, due to the effect of negative pressure, feeding effect declines to a great extent and even disappears.In order to strengthen the feeding effect of open riser, a kind of method is, adopts insulated feeder or exothermic riser, although the good cost of its feeding effect is high; Another kind method is, after casting complete, covers open riser top with heat preserving agent, delay solidifying of rising head top, to improve the feeding effect of open riser, but this kind of method, working condition during operation is severe, and heat preserving agent not easily just in time covers on rising head, has to the consumption strengthening heat preserving agent.Therefore the method has following deficiency: one is, operating condition is poor, and labour intensity is high; Two are, easily cause the waste of heat preserving agent, improve production cost; Three are, heavy castings casting mold is very high sometimes, by conditionality, cannot use heat preserving agent.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of method for improving ironcasting open riser feeding effect is provided, before pouring into a mould, above open riser, settle a special mud core, reach the effect of feeding a casting when improving cast.Present invention also offers a kind of mud core for improving ironcasting open riser feeding effect.
For achieving the above object, the technical scheme taked of the present invention is as follows:
A kind of method for improving ironcasting open riser feeding effect, described open riser comprises the rising head body on top and the riser neck of bottom, it is characterized in that: make a disc mud core, the center on its top is round platform portion, bottom is round plate, the external diameter of this round plate is greater than the diameter of described rising head body, and the round plate upper surface around described round platform portion offers some outgassing grooves being communicated with outside; Ironcasting moulding is joined after case terminates, and is down placed in above described open riser by described mud core, the outgassing groove of this mud core is communicated with described open riser, carry out hot-air seasoning afterwards pour into a mould described ironcasting again to casting mold so that described outgassing groove is uncovered.
As further improvement, the concrete steps of described method are as follows:
1) geomery of described mud core is determined;
2) core box is made;
3) make mud core, this mud core is disc, and the center on its top is round platform portion, and bottom is round plate, and the external diameter of this round plate is greater than the diameter of described rising head body, and the round plate upper surface around described round platform portion offers some outgassing grooves being communicated with outside;
4) to step 3) the mud core that completes carries out swabbing and oven dry;
5) ironcasting moulding is joined after case terminates, and is positioned over above open riser, the outgassing groove of this mud core is communicated with described mud core with described open riser, no longer moves with the uncovered downward position of described outgassing groove;
6) hot-air seasoning is carried out to casting mold, carry out the cast of described ironcasting afterwards.
Another technical scheme of the present invention is as follows:
A kind of mud core for improving ironcasting open riser feeding effect for realizing said method, for disc, the center on its top is round platform portion, bottom is round plate, the external diameter of this round plate is greater than the diameter of described rising head body, round plate upper surface around described round platform portion offers some outgassing grooves, the ft connection around this outgassing groove and described mud core.
As further improvement, the sectional area sum of all described outgassing grooves is not less than the sectional area of described riser neck.
As further improvement, the height in described round platform portion is not less than 15% of described rising head height.
Compared with prior art, the invention has the beneficial effects as follows:
1, simple to operate, economical and practical, enhance the feeding effect of open riser;
2, possess strengthening hot blast effect, prevent foreign matter to enter the effect of die cavity;
3, do not use heat preserving agent, reduce production cost, be specially adapted to the production of large-sized iron casting.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Fig. 2 is using state schematic diagram of the present invention.
Fig. 3 is structural representation of the present invention.
Fig. 4 is the top view of Fig. 3.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the method and mud core for improving ironcasting open riser feeding effect of the present invention is described further, but should limit the scope of the invention with this.
Refer to Fig. 2, the open riser of diagram ironcasting 3 comprises the rising head body 21 on top and the riser neck 22 of bottom, and this riser neck 22 connects described ironcasting 3.
Refer to Fig. 1, method for improving ironcasting open riser feeding effect of the present invention comprises, make a disc mud core, the center on its top is round platform portion, bottom is round plate, the external diameter of this round plate is greater than the diameter of described rising head body, and the round plate upper surface around described round platform portion offers some outgassing grooves being communicated with outside; Ironcasting moulding is joined after case terminates, and is down placed in above described open riser by described mud core, the outgassing groove of this mud core is communicated with described open riser, carry out hot-air seasoning afterwards pour into a mould described ironcasting again to casting mold so that described outgassing groove is uncovered.
Incorporated by reference to consulting Fig. 3 and Fig. 4, the described mud core 1 for improving ironcasting open riser feeding effect is disc, the center on its top is round platform portion 11, bottom is round plate 12, the external diameter of this round plate 12 is greater than the diameter of described rising head body 21, round plate 12 upper surface around described round platform portion 11 offers some outgassing grooves 13, the ft connection around this outgassing groove 13 and described mud core 1.General, the thickness of round plate 12 is not less than 40mm; The sectional area sum of all described outgassing grooves 13 is not less than the sectional area of described riser neck 22; The height in described round platform portion 11 is not less than 15% of described rising head body 21 height.
Embodiment
The described method concrete operation step for improving ironcasting open riser feeding effect is as follows:
1, mud core 1 used is determined in design
Refer to Fig. 2, rising head body 21 diameter of ironcasting open riser is 280mm, is highly 400mm, and incorporated by reference to consulting Fig. 3 and Fig. 4, the external diameter of the round plate 12 of mud core 1 is 360mm, 80mm larger than rising head body 21 diameter, and round plate 12 thickness is 40mm; Riser neck 22 diameter of ironcasting open riser is 100mm, and sectional area is 78500mm
2, round plate 12 upper surface around described round platform portion 11 offers 12 road outgassing grooves 13, and the width of outgassing groove 13 is 30mm, and the degree of depth is 22mm, and length is 80mm, and the total sectional area of 12 thus all road outgassing grooves 13 is not less than the sectional area of riser neck 22; The height in the round platform portion 11 of mud core 1 is 60mm, and end diameter is of a size of 10mm, and tapering is 60 °, and the height in this round platform portion 11 is not less than 15% of described rising head body 21 height.
2, core box is made.
3, mud core 1 is made with resin sand, this mud core 1 is disc, and the center on its top is round platform portion 11, and bottom is round plate 12, the external diameter of this round plate 12 is greater than the diameter of described rising head body 21, and round plate 12 upper surface around described round platform portion 11 offers 12 roads and is communicated with outside outgassing groove 13.
4, to step 3) the mud core 1 that completes carries out swabbing and oven dry.
5, refer to Fig. 2, ironcasting moulding is joined after case terminates, and by described mud core 1 with the uncovered downward position of described outgassing groove 13, is namely placed upside down above open riser, the outgassing groove 13 of this mud core 1 is communicated with described open riser, no longer moves.
6, hot-air seasoning is carried out to casting mold 4, carry out the cast of described ironcasting 3 afterwards.
The protection domain of application claims is not limited only to above-described embodiment; to those skilled in the art; without departing from the principles and spirit of the present invention, done any amendment, equivalent replacement, apparent modification and improvement, all should belong to protection scope of the present invention.
Claims (5)
1. one kind for improving the method for ironcasting open riser feeding effect, described open riser comprises the rising head body on top and the riser neck of bottom, it is characterized in that: make a disc mud core, the center on its top is round platform portion, bottom is round plate, the external diameter of this round plate is greater than the diameter of described rising head body, and the round plate upper surface around described round platform portion offers some outgassing grooves being communicated with outside; Ironcasting moulding is joined after case terminates, and is down placed in above described open riser by described mud core, the outgassing groove of this mud core is communicated with described open riser, carry out hot-air seasoning afterwards pour into a mould described ironcasting again to casting mold so that described outgassing groove is uncovered.
2. the method for improving ironcasting open riser feeding effect according to claim 1, is characterized in that: the concrete steps of described method are as follows:
1) geomery of described mud core is determined;
2) core box is made;
3) make mud core, this mud core is disc, and the center on its top is round platform portion, and bottom is round plate, and the external diameter of this round plate is greater than the diameter of described rising head body, and the round plate upper surface around described round platform portion offers some outgassing grooves being communicated with outside;
4) to step 3) the mud core that completes carries out swabbing and oven dry;
5) ironcasting moulding is joined after case terminates, and is positioned over above open riser, the outgassing groove of this mud core is communicated with described mud core with described open riser, no longer moves with the uncovered downward position of described outgassing groove;
6) hot-air seasoning is carried out to casting mold, carry out the cast of described ironcasting afterwards.
3. one kind for realizing the mud core for improving ironcasting open riser feeding effect of method described in claim 1, it is characterized in that: this mud core described is disc, the center on its top is round platform portion, bottom is round plate, the external diameter of this round plate is greater than the diameter of described rising head body, round plate upper surface around described round platform portion offers some outgassing grooves, the ft connection around this outgassing groove and described mud core.
4. the mud core for improving ironcasting open riser feeding effect according to claim 3, is characterized in that: the sectional area sum of all described outgassing grooves is not less than the sectional area of described riser neck.
5. the mud core for improving ironcasting open riser feeding effect according to claim 3, is characterized in that: the height in described round platform portion is not less than 15% of described rising head height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410777612.1A CN104493097A (en) | 2014-12-15 | 2014-12-15 | Method and mud core for improving feeding effect of open riser of iron castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410777612.1A CN104493097A (en) | 2014-12-15 | 2014-12-15 | Method and mud core for improving feeding effect of open riser of iron castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104493097A true CN104493097A (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410777612.1A Pending CN104493097A (en) | 2014-12-15 | 2014-12-15 | Method and mud core for improving feeding effect of open riser of iron castings |
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| CN (1) | CN104493097A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107234215A (en) * | 2017-07-24 | 2017-10-10 | 江阴机械制造有限公司 | Combine the sand rising head of heating block in top |
| CN111069537A (en) * | 2019-12-27 | 2020-04-28 | 大连船用推进器有限公司 | Inverted modeling structure of marine controllable pitch propeller oil cylinder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100068A (en) * | 1986-01-07 | 1987-07-22 | 孙孟全 | Spherical heatproof riser cover |
| CN201380268Y (en) * | 2009-03-17 | 2010-01-13 | 山西太钢不锈钢股份有限公司 | Cylindrical liquid steel sampling ceramic pouring cup |
| CN201979041U (en) * | 2011-04-15 | 2011-09-21 | 天津凯欣克铸造材料有限公司 | Assembling structure of riser bush special for shell castings |
| AU2011100794A4 (en) * | 2011-07-01 | 2011-09-22 | Sufa Hengdian Machine Co.,Ltd.CNNC | Heat-insulating blind riser |
| CN102211140A (en) * | 2011-05-13 | 2011-10-12 | 无锡小天鹅精密铸造有限公司 | Casting mold for molding fine-deep hole and resin sand molding method thereof |
| CN202571181U (en) * | 2012-05-18 | 2012-12-05 | 胡新华 | Hollow riser sleeve |
| CN103028700A (en) * | 2011-10-08 | 2013-04-10 | 吴江市液铸液压件铸造有限公司 | Blind riser |
| DE202013105617U1 (en) * | 2013-12-10 | 2014-09-11 | Foseco International Limited | Feeder arrangement with an outlet seal |
-
2014
- 2014-12-15 CN CN201410777612.1A patent/CN104493097A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100068A (en) * | 1986-01-07 | 1987-07-22 | 孙孟全 | Spherical heatproof riser cover |
| CN201380268Y (en) * | 2009-03-17 | 2010-01-13 | 山西太钢不锈钢股份有限公司 | Cylindrical liquid steel sampling ceramic pouring cup |
| CN201979041U (en) * | 2011-04-15 | 2011-09-21 | 天津凯欣克铸造材料有限公司 | Assembling structure of riser bush special for shell castings |
| CN102211140A (en) * | 2011-05-13 | 2011-10-12 | 无锡小天鹅精密铸造有限公司 | Casting mold for molding fine-deep hole and resin sand molding method thereof |
| AU2011100794A4 (en) * | 2011-07-01 | 2011-09-22 | Sufa Hengdian Machine Co.,Ltd.CNNC | Heat-insulating blind riser |
| CN103028700A (en) * | 2011-10-08 | 2013-04-10 | 吴江市液铸液压件铸造有限公司 | Blind riser |
| CN202571181U (en) * | 2012-05-18 | 2012-12-05 | 胡新华 | Hollow riser sleeve |
| DE202013105617U1 (en) * | 2013-12-10 | 2014-09-11 | Foseco International Limited | Feeder arrangement with an outlet seal |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107234215A (en) * | 2017-07-24 | 2017-10-10 | 江阴机械制造有限公司 | Combine the sand rising head of heating block in top |
| CN111069537A (en) * | 2019-12-27 | 2020-04-28 | 大连船用推进器有限公司 | Inverted modeling structure of marine controllable pitch propeller oil cylinder |
| CN111069537B (en) * | 2019-12-27 | 2021-08-24 | 大连船用推进器有限公司 | Inverted modeling structure of marine controllable pitch propeller oil cylinder |
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Application publication date: 20150408 |
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