CN104785715A - Casting method capable of preventing coarse graphite on surface of convex model - Google Patents
Casting method capable of preventing coarse graphite on surface of convex model Download PDFInfo
- Publication number
- CN104785715A CN104785715A CN201410179708.8A CN201410179708A CN104785715A CN 104785715 A CN104785715 A CN 104785715A CN 201410179708 A CN201410179708 A CN 201410179708A CN 104785715 A CN104785715 A CN 104785715A
- Authority
- CN
- China
- Prior art keywords
- profile
- graphite
- molded surface
- model
- casting method
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention provides a casting method capable of preventing coarse graphite on the surface of a convex model. The casting method is characterized in that the design form of model processing volume during fabrication of the model is changed, and machining allowance at a structure of a molded surface in the range of vertical ribs of the molded surface is reduced by 3 mm during processing and fabrication of the model so as to form a concave groove; and the upper end of the molded surface is filled with resin sand with a thickness of 15 to 20 mm, and an indirect chilling block is placed in the concave groove on the molded surface. According to the invention, since the processing volume at the structure of the molded surface in the range of the vertical ribs is properly reduced, cooling of molten iron and growth of graphite at each position are synchronized, the situation of appearance of needle eye-like holes caused by coarse graphite resulting from continuous increase of graphite on a local part of the molded surface is avoided, and the quality of a casting is improved; moreover, the concave groove plays a marking role for on-site production, allows the position for placing of the indirect chilling block to be visible, and facilitates production operation.
Description
Technical field
The present invention relates to lost foam casting field, particularly relate to a kind of casting method of preventing punch surface graphite thick.
Background technology
In lost foam casting process, by foam, the impact of every factors such as construction, often make cast(ing) surface more coarse, therefore each casting producer all can add certain allowance on the face that required precision is higher, mechanical process is carried out so that follow-up, obtain the goods that profile precision is higher, with regard to magnesium iron punch foundry goods, in order to increase the cooling velocity at magnesium iron punch shape face place, chill all can be placed in profile by each casting producer, but bottom surface is existed to the model of stud structure, because stud structure is greatly thick, most heat is concentrated in reinforcing rib structure place, cause solidifying of molten iron herein slow compared with other positions, when molten iron does not solidify, graphite is growing always, this just causes the graphite in the position of first solidifying to stop growing, and the graphite meeting continued growth at this structure place is until molten iron solidifies completely, although the profile of model there is part allowance, but chill just ensure that the institutional framework place zero defect within cooling processing capacity, most defect transfers to the position of below Mechanical processing of casting surplus, in following process process, thick graphite structure is easy to processed cutter head and peels off, the position that graphite peels off on foundry goods forms the aperture of some needle-like, light then need to carry out soldering to foundry goods, heavy then cause foundry goods directly to be scrapped, bring very large economic loss to casting producer, for a long time, this problem annoyings many Foundry Inc..
Summary of the invention
According to above technical problem, the invention provides the casting method that a kind of prevention punch surface graphite of easy economy is thick, it is characterized in that: by changing mould processing amount design form in modelling process, when carrying out processing and fabricating to model, moulding surface structure place allowance within the scope of profile stud is reduced 3mm, forms groove; When burying sand molding, at the resin sand of the upper end landfill 15 ~ 20mm of profile, more indirect chill is placed on the groove in profile.
Described punch comprises profile, stud, groove, and the bottom of described profile is provided with stud, and position corresponding with stud in described profile is provided with groove.
Beneficial effect of the present invention is: the present invention improves on original lost-foam casting method, by the minimizing that the moulding surface structure place processing capacity within the scope of stud is suitable, make the cooling of the molten iron of each position in profile, the growth of graphite reaches synchronous, avoid local profile graphite continued propagation and the situation making graphite thick, even if process, profile also there will not be the defect of needle-like hole, improves the quality of foundry goods; And groove is also for on-the-spot production serves a mark effect, makes the position of the indirect chill of placement visual, is convenient to production operation.
Accompanying drawing explanation
Fig. 1 is casting method schematic diagram of the present invention;
Fig. 2 is punch schematic diagram of the present invention.
Detailed description of the invention
According to Fig. 1, Fig. 2, the present invention is further described:
As shown in Figure 1, Figure 2, profile-1, stud-2, groove-3.
Embodiment 1
The present invention by changing the processing capacity design form of model in modelling process, when carrying out processing and fabricating to model, structure place allowance in stud 2 scope in profile 1 is reduced 3mm, form groove 3, make the position of placement chill visual, the production for scene serves a mark effect; When burying sand molding, at the resin sand of the upper end landfill 15 ~ 20mm of profile 1, then chill 4 is placed on the groove in profile.
Embodiment 2
Punch comprises profile 1, stud 2, groove 3, in the bottom of profile 1, stud 2 is set, minimizing suitable with the processing capacity of stud 2 correspondence position in profile 1 forms groove 3, make the cooling of the molten iron of each position in profile 1, the growth of graphite reaches synchronous, avoid the sustainable growth of local profile graphite and make the thick situation occurring needle-like hole of graphite.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (2)
1. a casting method of preventing punch surface graphite thick, it is characterized in that: by changing mould processing amount design form in modelling process, when carrying out processing and fabricating to model, the moulding surface structure place allowance within the scope of profile stud being reduced 3mm, forms groove; When burying sand molding, at the resin sand of the upper end landfill 15 ~ 20mm of profile, more indirect chill is placed on the groove in profile.
2., according to a kind of punch preventing punch surface graphite thick according to claim 1, it is characterized in that: comprise profile, stud, groove, the bottom of described profile is provided with stud, and position corresponding with stud in described profile is provided with groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410179708.8A CN104785715A (en) | 2014-04-30 | 2014-04-30 | Casting method capable of preventing coarse graphite on surface of convex model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410179708.8A CN104785715A (en) | 2014-04-30 | 2014-04-30 | Casting method capable of preventing coarse graphite on surface of convex model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104785715A true CN104785715A (en) | 2015-07-22 |
Family
ID=53551152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410179708.8A Pending CN104785715A (en) | 2014-04-30 | 2014-04-30 | Casting method capable of preventing coarse graphite on surface of convex model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104785715A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106141146A (en) * | 2016-07-27 | 2016-11-23 | 共享装备股份有限公司 | A kind of method fixing chill on mould inclined-plane |
| CN107297486A (en) * | 2017-06-30 | 2017-10-27 | 共享装备股份有限公司 | A kind of set-up mode every sand cooling iron |
| CN113042712A (en) * | 2019-12-26 | 2021-06-29 | 南通虹冈铸钢有限公司 | Indirect chill for preventing shrinkage porosity of nodular cast iron pressure plate groove and processing technology thereof |
| CN113634713A (en) * | 2021-08-17 | 2021-11-12 | 南通虹冈铸钢有限公司 | Molding method for preventing sand sticking |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0866761A (en) * | 1994-08-30 | 1996-03-12 | Nissan Motor Co Ltd | Method for casting cast product having locally softened part and casting device |
| CN101406932A (en) * | 2008-11-10 | 2009-04-15 | 泉州腾达精铸有限公司 | Precision-investment casting method |
| CN201832951U (en) * | 2010-11-05 | 2011-05-18 | 广东省韶铸集团有限公司 | Sand-hung external chill |
| CN202162341U (en) * | 2011-06-10 | 2012-03-14 | 河南豫兴铸造有限公司 | Inner core of die for casting vale bodies of butterfly valves |
| CN103100663A (en) * | 2011-11-10 | 2013-05-15 | 天津市立鑫晟精细铸造有限公司 | Method for eliminating lost foam cast shrinkage crack defects of screw conveyor products |
-
2014
- 2014-04-30 CN CN201410179708.8A patent/CN104785715A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0866761A (en) * | 1994-08-30 | 1996-03-12 | Nissan Motor Co Ltd | Method for casting cast product having locally softened part and casting device |
| CN101406932A (en) * | 2008-11-10 | 2009-04-15 | 泉州腾达精铸有限公司 | Precision-investment casting method |
| CN201832951U (en) * | 2010-11-05 | 2011-05-18 | 广东省韶铸集团有限公司 | Sand-hung external chill |
| CN202162341U (en) * | 2011-06-10 | 2012-03-14 | 河南豫兴铸造有限公司 | Inner core of die for casting vale bodies of butterfly valves |
| CN103100663A (en) * | 2011-11-10 | 2013-05-15 | 天津市立鑫晟精细铸造有限公司 | Method for eliminating lost foam cast shrinkage crack defects of screw conveyor products |
Non-Patent Citations (2)
| Title |
|---|
| 孙昌镔: "铸造大齿轮间接外冷铁工艺设计与应用", 《2009海峡两岸机械科技论坛论文集》 * |
| 聂小武: "《实用铸件缺陷分析及对策实例》", 31 March 2010 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106141146A (en) * | 2016-07-27 | 2016-11-23 | 共享装备股份有限公司 | A kind of method fixing chill on mould inclined-plane |
| CN107297486A (en) * | 2017-06-30 | 2017-10-27 | 共享装备股份有限公司 | A kind of set-up mode every sand cooling iron |
| CN113042712A (en) * | 2019-12-26 | 2021-06-29 | 南通虹冈铸钢有限公司 | Indirect chill for preventing shrinkage porosity of nodular cast iron pressure plate groove and processing technology thereof |
| CN113634713A (en) * | 2021-08-17 | 2021-11-12 | 南通虹冈铸钢有限公司 | Molding method for preventing sand sticking |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104128564B (en) | A kind of casting technique of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear | |
| CN104785715A (en) | Casting method capable of preventing coarse graphite on surface of convex model | |
| CN101439398B (en) | Method for casting ultralong, large-sized machine tool casting parts | |
| CN102019362A (en) | Die and method for casting crankcase | |
| CN106077472A (en) | A kind of hot investment casting moulding process of foundry goods | |
| CN103551521A (en) | Casting method for guide vane casting piece | |
| CN204975225U (en) | Be used for as cast casting mould of cast steel butterfly plate | |
| CN202555769U (en) | Horizontally molding and vertically pouring mold for cutter tooth holders for crushers | |
| CN104741577A (en) | Technology for producing aluminum copper alloy castings through metal-mould low pressure casting | |
| CN103252469A (en) | Modeling method for placing chilling block on vertical face of large casting | |
| CN203091715U (en) | Die-casting die used for thin-wall aluminum alloy outer shell | |
| CN205702323U (en) | Iron Mould Coated Sand technique insulated feeder device | |
| CN104999030A (en) | Pump body casting process | |
| CN205289677U (en) | Foundry goods shift detects uses model | |
| CN202762962U (en) | Casting mould | |
| CN208906294U (en) | Chill makes tooling | |
| JP2009262196A (en) | Casting method and mold | |
| CN206492907U (en) | Alloy cast iron ball mould | |
| CN101733387B (en) | Low pressure casting method of aluminium alloy lost foam | |
| CN102554138A (en) | Cutter tooth holder casting mold for crushing machines and horizontally molding-vertically pouring casting process for cutter tooth holders for crushing machines | |
| CN207972284U (en) | A kind of plastic bottle casting mould | |
| CN203140702U (en) | Flywheel casting mould | |
| CN208303781U (en) | A kind of placing sand block in self-hardening sand casting control chill gap | |
| CN201493450U (en) | Casting mould board | |
| CN109500374A (en) | A kind of low pressure casting die and its installation method with fibrous filter net |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150722 |
|
| RJ01 | Rejection of invention patent application after publication |