CN104384444A - Sand mold structure of oil pan casting - Google Patents
Sand mold structure of oil pan casting Download PDFInfo
- Publication number
- CN104384444A CN104384444A CN201410694162.XA CN201410694162A CN104384444A CN 104384444 A CN104384444 A CN 104384444A CN 201410694162 A CN201410694162 A CN 201410694162A CN 104384444 A CN104384444 A CN 104384444A
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- CN
- China
- Prior art keywords
- sand mold
- foundry goods
- mold
- casting
- sand
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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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
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
Abstract
The invention relates to a sand mold structure of an oil pan casting, belonging to the technical field of casting. The sand mold structure comprises an upper sand mold, a lower sand mold and a mold core, wherein cavities corresponding to flange plates of the oil pan casting are vertically arranged in the upper sand mold and the lower sand mold respectively; the parting surfaces of the upper sand mold and the lower sand mold are vertical to the forming surfaces corresponding to the top plane and the bottom surface of the casting respectively; forming structures corresponding to square doors on two side walls of the oil pan casting are correspondingly arranged on the upper side of the upper sand mold and the lower side of the lower sand mold, respectively; a section mold pouring system of the oil pan casting adopts a bottom pouring system which comprises a sprue, a cross gate and an ingate, and the inlet of the ingate is formed in the bottom side of a flange cavity of the lower sand mold. According to the sand mold structure of the oil pan casting, the defects of sand inclusion and pores existence at the thin wall of the casting can be effectively avoided by changing the positions of the parting surfaces of the mold and the angle of the rotating cavity, and thus the quality and the dimensional precision of the oil pan casting can be improved.
Description
Technical field
The present invention relates to casting technology field, particularly a kind of sand mould structure of oily circle plate casting.
Background technology
Oil circle plate casting is the store oil parts of internal combustion engine, to its air-tightness and requirement of withstand voltage higher, need to carry out seepage and air-leakage test.The primary structure of oil circle plate casting as shown in Figure 1, there is the oil pocket of a similar cuboid, surround primarily of top 1, sidewall 4 and bottom 5, and bottom 5 and sidewall 2 are thin-wall construction, particularly bottom 5 is the large plane of thin-walled, the interposition of sidewall 4 periphery is equipped with ring flange 3 structure of an evagination, and the also side's of offering door 2 respectively on the two side on oil pocket top, oil pocket top suitable for reading is provided with opening.
In prior art this type of oily circle plate casting casting method in, sand mo(u)ld structure has two kinds:
Method one, as shown in Figure 2, the large plane in bottom is arranged in sand mold upward, the end face of opening is had to be arranged in lower sand mold down, die joint is arranged on upper surface or the lower surface of ring flange, the core for the formation of oil pocket just marking or reactionary slogan, anti-communist poster in nowel, adopt bottom pouring type pouring.The advantage of the method is: operation is relatively simple, fills type more steady.Shortcoming is: 1) foundry goods end face pore, crackle and burning into sand defect are serious; 2) if coremaking time core have a little rise case or dimensional problem, during cored, the possibility of shearing friction will be there is for the formation of forming surface 2.1 edge of square door and forming surface 2.2 edge of the corresponding of lower impressions in core, as shown in Figure 3, the Fang Men position of foundry goods is caused to occur burning into sand defect because rubbing sand; 3) mark core complicated operation, extend manufacture cycle.
Method two, as shown in Figure 4, along ring flange surface somatotype, contrary with method one, bottom flats down greatly and is arranged in lower sand mold, and have the end face of opening to be arranged in sand mold upward, core puts on case, adopts bottom filling during cast.The advantage of the method is: large plane gas hole defect is eliminated substantially, but makes large plane burning into sand outstanding problem because molten iron rushes core problem.Shortcoming: 1) complicated operation; 2) there is rocking in various degree in core in mould turnover process, and size is difficult to ensure; 3) if coremaking time core have a little rise case or dimensional problem, during core assembly, above core will there is the possibility of shearing friction in the edge of the forming surface 2.3 that the edge 2.1 of the forming surface of door is corresponding with upper impression, as accompanying drawing 5 is illustrated, the Fang Men position of foundry goods is caused to occur burning into sand defect because rubbing sand.
Above two kinds of processes all can not solve end face thin-walled burning into sand (slag), the gas hole defect of sand mold on foundry goods, its reason comprise following some: in casting process, molten iron flings fuse, time serious, core local washes out, and causes being involved in partial air and loose sand in molten iron; Molten iron in cavity filling process along with the rising of liquid level, larger to the degradation degree of die cavity, the thermal loss of molten iron is larger, and liquid level place molten iron dirtier (sand, slag), cause thin-walled place, sand mold top molten iron temperature minimum, be unfavorable for that gas and bits float, air inside chill water, bits very major part are trapped in end face place, cause thin-walled place, top pore burning into sand defect serious.
Summary of the invention
The present invention is directed to the problems referred to above that prior art exists, a kind of thin-walled position pore, the burning into sand defect that can avoid food tray foundry goods are provided, improve the sand mould structure of the quality of foundry goods and the oily circle plate casting of Foundry Production rate.
The object of the present invention is achieved like this, a kind of sand mould structure of oily circle plate casting, the sand mold of its food tray foundry goods comprises sand mold, lower sand mold and core, the die cavity that the ring flange of described food tray foundry goods is corresponding is vertically set in sand mold and lower sand mold respectively, the forming surface that described upper sand mold is corresponding with bottom surface with the top plane of foundry goods with the die joint of lower sand mold is vertical, the molding structure of the square door correspondence on food tray foundry goods two side respectively correspondence is arranged on the upside of sand mold and on the downside of lower sand mold, the pattern running gate system of described food tray foundry goods adopts bottom pour mold injection system, comprise sprue, cross gate and ingate, described ingate entrance is arranged at bottom side, lower sand mold flange chamber, the top of the die cavity that the ring flange of described upper sand mold is corresponding is provided with steam vent.
Food tray class swage configuration of the present invention, is arranged foundry goods die cavity half-twist, and square door to be arranged on the upside of sand mold and on the downside of lower sand mold, and when can avoid cored, sand and square door edge shearing phenomenon are rubbed in Fang Men position, thus reduce the defect that door place of foundry goods side produces burning into sand.In addition, in structure of the present invention, die cavity half-twist is arranged, and bottom foundry goods and the thin-walled position of sidewall is in the left and right sides of die cavity, and the top of die cavity is the cavity position that ring flange that thickness is thicker is corresponding, when adopting bottom pour mold injection system to pour into a mould from the bottom of die cavity, fill type steady, there is not molten iron in cast and fling fuse phenomenon, effectively reduce the probability of molten iron cavity filling process volume gas, slag making, thus molten iron burning into sand in die cavity is reduced, molten steel quality improves.The molten metal temperature of foundry goods thin-walled place die cavity is relatively high, good fluidity, be conducive to gas float and discharge, the molten iron that temperature is lower concentrates on the flange chamber place at die cavity top, effectively collect by gas rising head, and other position wall thickness of the Thickness Ratio foundry goods of flange is thick, is more conducive to gas and discharges from top flange chamber.Therefore food tray class casting sand mold structure of the present invention, by changing sand mold die joint position and rotating die cavity angle, effectively can avoid foundry goods thin-walled place to occur the defect of burning into sand, pore and crackle, thus improve quality and the dimensional accuracy of oily circle plate casting.
As a further improvement on the present invention, the die joint of described upper sand mold and lower sand mold is arranged along the die cavity horizontal center of foundry goods.
Improve as of the present invention another, the as a whole core of described core, for the formation of the inner chamber of food tray foundry goods.
Accompanying drawing explanation
The structural representation of Fig. 1 oil circle plate casting.
Fig. 2 is that in prior art, bottom food tray foundry goods, large plane is arranged on the foundry goods swage configuration schematic diagram in sand mold upward.
Fig. 3 is the foundry goods pattern core assembly schematic diagram that bottom food tray foundry goods, large plane is arranged upward.
Fig. 4 is the foundry goods swage configuration schematic diagram be arranged in lower sand mold that flats down greatly bottom food tray foundry goods in prior art.
Fig. 5 is the core assembly schematic diagram of foundry goods pattern arranged that flats down greatly bottom food tray foundry goods.
Fig. 6 is the structural representation of oily circle plate casting pattern of the present invention.
Fig. 7 is oily circle plate casting pattern core assembly schematic diagram of the present invention.
Wherein, 1 top; 2 side's doors; 2.1 forming surface; 2.2 forming surface; 2.3 forming surface; 3 ring flanges; 4 sidewalls; Bottom 5; 6 ingates; 7 cross gates; 8 sprues; 9 times sand molds; Sand mold on 10; 11 cores; 12 die joints; 13 steam vents.
Detailed description of the invention
Be the sand mould structure of oily circle plate casting of the present invention as shown in Figure 6 and Figure 7, the sand mold of its food tray foundry goods comprises sand mold 10, lower sand mold 9 and core 11, the die cavity of ring flange 3 correspondence of food tray foundry goods is vertically set in sand mold 10 and lower sand mold 9 respectively, to be equivalent in hinge structure sand mould structure by die cavity half-twist, the forming surface that upper sand mold 10 is corresponding with bottom surface with the top plane of foundry goods with the die joint 12 of lower sand mold 9 is vertical, the molding structure of square door 2 correspondence on food tray foundry goods two side respectively correspondence is arranged on the upside of sand mold 10 and on the downside of lower sand mold 9, the pattern running gate system of food tray foundry goods adopts bottom pour mold injection system, comprise sprue 8, cross gate 7 and ingate 6, ingate 6 entrance is arranged at bottom side, lower sand mold 9 flange chamber, the top of the die cavity that the ring flange of upper sand mold 10 is corresponding is provided with steam vent 13, the die joint 12 of upper sand mold 10 and lower sand mold 9 is arranged along the die cavity horizontal center of foundry goods, and be the as a whole core of core, for the formation of the inner chamber of food tray foundry goods, facilitate core assembly.
Food tray class sand mould structure of the present invention, the direction half-twist of foundry goods in sand mold is arranged, side's door to be arranged on the upside of sand mold 10 and on the downside of lower sand mold 9, and when can avoid cored, sand and square door edge shearing phenomenon are rubbed in Fang Men position, thus reduce the defect that door place of foundry goods side produces burning into sand.Sand mould structure of the present invention compared with prior art, die cavity half-twist is arranged, bottom foundry goods and the thin-walled position of sidewall is in the both sides of die cavity, the top of die cavity is the die cavity position that ring flange that thickness is thicker is corresponding, when adopting bottom pour mold injection system to pour into a mould from the bottom of die cavity, fills type steady, there is not molten iron in cast and fling fuse phenomenon, the probability of effective minimizing molten iron cavity filling process volume gas, slag making, thus molten iron burning into sand in die cavity is reduced, molten steel quality improves.The molten metal temperature of foundry goods thin-walled place die cavity is relatively high, good fluidity, be conducive to gas float and discharge, the molten iron that temperature is lower concentrates on the flange chamber place at die cavity top, collection discharge is carried out by gas rising head, and other position wall thickness of the Thickness Ratio foundry goods of flange is thick, is more conducive to gas and discharges from top flange.Therefore the sand mould structure of oily circle plate casting of the present invention, by changing sand mold die joint position and rotating die cavity angle, foundry goods thin-walled place and large flat components effectively can be avoided to occur the defect of burning into sand, pore and crackle, thus improve quality and the dimensional accuracy of oily circle plate casting.
Claims (3)
1. the sand mould structure of an oily circle plate casting, it is characterized in that, the sand mold of its food tray foundry goods comprises sand mold, lower sand mold and core, the die cavity that the ring flange of described food tray foundry goods is corresponding is vertically set in sand mold and lower sand mold respectively, the forming surface that described upper sand mold is corresponding with bottom surface with the top plane of foundry goods with the die joint of lower sand mold is vertical, the molding structure of the square door correspondence on food tray foundry goods two side respectively correspondence is arranged on the upside of sand mold and on the downside of lower sand mold, the pattern running gate system of described food tray foundry goods adopts bottom pour mold injection system, comprise sprue, cross gate and ingate, described ingate entrance is arranged at bottom side, lower sand mold flange chamber, the top of the die cavity that the ring flange of described upper sand mold is corresponding is provided with steam vent.
2. the sand mould structure of oily circle plate casting according to claim 1, is characterized in that, the die joint of described upper sand mold and lower sand mold is arranged along the die cavity horizontal center of foundry goods.
3. the sand mould structure of oily circle plate casting according to claim 2, is characterized in that, the as a whole core of described core, for the formation of the inner chamber of food tray foundry goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410694162.XA CN104384444A (en) | 2014-11-27 | 2014-11-27 | Sand mold structure of oil pan casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410694162.XA CN104384444A (en) | 2014-11-27 | 2014-11-27 | Sand mold structure of oil pan casting |
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| Publication Number | Publication Date |
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| CN104384444A true CN104384444A (en) | 2015-03-04 |
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| CN201410694162.XA Pending CN104384444A (en) | 2014-11-27 | 2014-11-27 | Sand mold structure of oil pan casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108405807A (en) * | 2018-04-02 | 2018-08-17 | 广西玉柴机器股份有限公司 | A kind of the sand mold component and method of aluminum alloy oil pan casting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603941A (en) * | 1983-06-21 | 1985-01-10 | Asahi Malleable Iron Co Ltd | Casting method of cylindrical body |
| DE19535457C1 (en) * | 1995-09-23 | 1996-08-08 | Winter Fritz Eisengiesserei | Preparing mould for casting disc-shaped body, partic. brake disc |
| CN101618426A (en) * | 2009-07-25 | 2010-01-06 | 宁波明灵机械有限公司 | Method for casting main shaft casts of stators in aerogenerators |
| CN102248132A (en) * | 2011-05-30 | 2011-11-23 | 日月重工股份有限公司 | Method for casting large stamping cylinder casting |
| CN202343874U (en) * | 2011-12-01 | 2012-07-25 | 中国西电电气股份有限公司 | Casting die of large high-conductivity and pressure-resistant aluminum shell |
| CN204321101U (en) * | 2014-11-27 | 2015-05-13 | 宁夏共享装备有限公司 | A kind of sand mould structure of oily circle plate casting |
-
2014
- 2014-11-27 CN CN201410694162.XA patent/CN104384444A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603941A (en) * | 1983-06-21 | 1985-01-10 | Asahi Malleable Iron Co Ltd | Casting method of cylindrical body |
| DE19535457C1 (en) * | 1995-09-23 | 1996-08-08 | Winter Fritz Eisengiesserei | Preparing mould for casting disc-shaped body, partic. brake disc |
| CN101618426A (en) * | 2009-07-25 | 2010-01-06 | 宁波明灵机械有限公司 | Method for casting main shaft casts of stators in aerogenerators |
| CN102248132A (en) * | 2011-05-30 | 2011-11-23 | 日月重工股份有限公司 | Method for casting large stamping cylinder casting |
| CN202343874U (en) * | 2011-12-01 | 2012-07-25 | 中国西电电气股份有限公司 | Casting die of large high-conductivity and pressure-resistant aluminum shell |
| CN204321101U (en) * | 2014-11-27 | 2015-05-13 | 宁夏共享装备有限公司 | A kind of sand mould structure of oily circle plate casting |
Non-Patent Citations (1)
| Title |
|---|
| 戈晓岚等: "《工程材料及其成形基础》", 31 August 2012, 高等教育出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108405807A (en) * | 2018-04-02 | 2018-08-17 | 广西玉柴机器股份有限公司 | A kind of the sand mold component and method of aluminum alloy oil pan casting |
| CN108405807B (en) * | 2018-04-02 | 2023-09-19 | 广西玉柴机器股份有限公司 | Sand mould assembly and method for casting aluminum alloy oil pan |
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Application publication date: 20150304 |