CN104353790B - The preparation method of closed type space curved surface structural casting core - Google Patents
The preparation method of closed type space curved surface structural casting core Download PDFInfo
- Publication number
- CN104353790B CN104353790B CN201410635563.8A CN201410635563A CN104353790B CN 104353790 B CN104353790 B CN 104353790B CN 201410635563 A CN201410635563 A CN 201410635563A CN 104353790 B CN104353790 B CN 104353790B
- Authority
- CN
- China
- Prior art keywords
- curved surface
- core
- space curved
- sand
- water
- 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.)
- Active
Links
Classifications
-
- 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
Abstract
The preparation method that the present invention proposes a kind of closed type space curved surface structural casting core, by space curved surface structure prepared by water solublity material pre-buried in self-hardening property sand, with water, space curved surface structure is dissolved after self-hardening property sand solidifies, it is possible to obtain meeting the space curved surface structure inner chamber of curved surface requirement.The preferred carbamide of the present invention, as water-soluble material, compared to adopting Sal as water-soluble material, mainly utilizes the advantage that carbamide dissolubility is high, fusing point is low and has intensity after solidification.Preferred furan resin-sand is as self-hardening property sand, compared to Lauxite sand, mainly utilizes furan resin-sand resistance to elevated temperatures in baking process better than Lauxite sand, feature that will not be defeated and dispersed.
Description
Technical field
The present invention relates to the fabricating technology field of core for cast, the preparation method being specially a kind of closed type space curved surface structural casting core.
Background technology
Closed type space curved surface structural casting, as having the open and close type hydraulics impeller of complex rotation curved surface, its space curved surface structure is the blade with space torsion manifold, and blade is in the middle of two interlayers of impeller, therefore when casting open and close type hydraulics impeller, it is necessary to adopt core.And the cavity curve form of core determines the space curved surface shape of foundry goods that casting obtains, therefore how preparing cavity curve form, to meet the core of requirement be the problem that casting closed type space curved surface structural casting first has to solve.
At present, the technique of traditional preparation closed type space curved surface structural casting core is: first process the space curved surface structure (blade such as open and close type hydraulics impeller) of independent metal quality, it is fixed in during coremaking on core box, then consolidation is filled with thermosetting sand (such as oil-sand), again by space curved surface connection loosing, the creep relying on oil-sand is made a concession and is taken out space curved surface structure, the cavity deformation so formed on core is serious, and shape is bigger with real space curved-surface structure model difference.In addition oil-sand has to pass through and toasts and could solidify, baking must be held with core holder, technological equipment is complicated, and vibrations during under gravity with carrying all cause core internal cavity change of shape to increase the weight of further, the space curved surface shape of the closed type space curved surface structural casting in this way produced differs relatively big with the curve form of actual design, and corresponding closed type space curved surface structural casting does not just reach the Expected Results of design yet.
Summary of the invention
The present invention solves that closed type space curved surface structural casting is in preparing core process, the deformation of core internal cavity is serious, the incongruent problem of space curved surface designing requirement with closed type space curved surface structural casting, the preparation method proposing a kind of closed type space curved surface structural casting core, by space curved surface structure prepared by water solublity material pre-buried in self-hardening property sand, with water, space curved surface structure is dissolved after self-hardening property sand solidifies, and make the core cavity curved surface formed comply fully with the designing requirement of space curved surface structure.
The technical scheme is that
The preparation method of described a kind of closed type space curved surface structural casting core, it is characterised in that: adopt following steps:
Step 1: prepare independent space curved surface structure mold and core body core box；
Step 2: will pour into after water-soluble material heating and melting in space curved surface structure mold, after cooling makes water-soluble material solidification, die sinking is taken out and is repaired, and obtains space curved surface structure prepared by water-soluble material；
Several independent space curved surface structures are fixed by step 3: the structural requirement according to closed type space curved surface structural casting on core body core box female die；
Step 4: self-hardening property sand is inserted main body core box consolidation, after self-hardening property sand hardens, opens core main core box, takes out core；
Step 5: by the water-soluble material water dissolution in core, then by core baking, obtains closed type space curved surface structural casting core.
Further preferred version, the preparation method of described a kind of closed type space curved surface structural casting core, it is characterised in that: water-soluble material adopts carbamide.
Further preferred version, the preparation method of described a kind of closed type space curved surface structural casting core, it is characterised in that: self-hardening property sand adopts furan resin-sand.
Beneficial effect
The invention has the beneficial effects as follows:
The space curved surface structure that the present invention is prepared by water solublity material pre-buried in self-hardening property sand, dissolves space curved surface structure with water, it is possible to obtain meeting the space curved surface structure inner chamber of curved surface requirement after self-hardening property sand solidifies.Adopt carbamide as water-soluble material in a preferred approach, compared to adopting Sal as water-soluble material, mainly utilize the advantage that carbamide dissolubility is high, fusing point is low and has intensity after solidification.Adopt furan resin-sand as self-hardening property sand in a preferred approach, compared to Lauxite sand, mainly utilize furan resin-sand resistance to elevated temperatures in baking process better than Lauxite sand, feature that will not be defeated and dispersed.
Accompanying drawing explanation
Fig. 1: core body core box schematic diagram, wherein (a) is core body core box female die, and (b) is core body core box upper mold section.
Fig. 2: carbamide blade schematic diagram.
Fig. 3: carbamide blade is fixed on the schematic diagram on core body core box female die.
Fig. 4: the schematic diagram after core body of closing core box.
Fig. 5: core body core box fills the schematic diagram after furan resin-sand.
Fig. 6: the core schematic diagram before water-soluble.Wherein (a) is front, and (b) is the back side.
Fig. 7: the core schematic diagram after water-soluble.Wherein (a) is front, and (b) is the back side.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described:
Closed type space curved surface structural casting in the present embodiment is open and close type hydraulics impeller, and its space curved surface structure is blade, and the core preparation method of employing comprises the following steps:
Step 1: prepare independent blade mold (being used for preparing carbamide blade) and core body core box (being used for preparing resin sand core).Core body core box is as shown in Figure 1.
Step 2: by Urea to 150--160 DEG C, carbamide pours in blade mold after melting completely, cools down the 30-60 second, and after making carbamide solidification, carbamide blade is taken out in die sinking, and repairs, and obtains meeting the carbamide blade of curve form requirement.As shown in Figure 2.
Six carbamide blades are fixed by step 3: the structural requirement according to open and close type hydraulics impeller on main body core box female die, as it is shown on figure 3, then cover core body core box upper mold section, as shown in Figure 4.
Step 4: self-hardening furan resin-sand is inserted main body core box consolidation, as shown in Figure 5.After furan resin-sand hardens (20-30 minute), opening core main core box, take out core, core is as shown in Figure 6.
Step 5: treat that core is fully cured, puts into core in 35-40 DEG C of warm water 2-3 minute, makes carbamide dissolve；The core dissolving carbamide blade is put into baking oven, and 180--200 DEG C is toasted 2-3 hour, by core baking, obtains closed type space curved surface structural casting core, as shown in Figure 7.
Claims (2)
1. the preparation method of a closed type space curved surface structural casting core, it is characterised in that: adopt following steps:
Step 1: prepare independent space curved surface structure mold and core body core box；
Step 2: will pour into after water-soluble material heating and melting in space curved surface structure mold, after cooling makes water-soluble material solidification, die sinking is taken out and is repaired, and obtains space curved surface structure prepared by water-soluble material；Described water-soluble material adopts carbamide；
Several independent space curved surface structures are fixed by step 3: the structural requirement according to closed type space curved surface structural casting on core body core box female die；
Step 4: self-hardening property sand is inserted main body core box consolidation, after self-hardening property sand hardens, opens core main core box, takes out core；
Step 5: by the water-soluble material water dissolution in core, then by core baking, obtains closed type space curved surface structural casting core.
2. the preparation method of a kind of closed type space curved surface structural casting core according to claim 1, it is characterised in that: self-hardening property sand adopts furan resin-sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410635563.8A CN104353790B (en) | 2014-11-12 | 2014-11-12 | The preparation method of closed type space curved surface structural casting core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410635563.8A CN104353790B (en) | 2014-11-12 | 2014-11-12 | The preparation method of closed type space curved surface structural casting core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104353790A CN104353790A (en) | 2015-02-18 |
| CN104353790B true CN104353790B (en) | 2016-06-29 |
Family
ID=52521148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410635563.8A Active CN104353790B (en) | 2014-11-12 | 2014-11-12 | The preparation method of closed type space curved surface structural casting core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104353790B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598384A (en) * | 2016-01-29 | 2016-05-25 | 刘士超 | Precoated sand casting method for submerged pump impeller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1055737A (en) * | 1964-03-25 | 1967-01-18 | Wellworthy Ltd | Improvements in casting processes |
| CN1792498A (en) * | 2005-11-29 | 2006-06-28 | 辽宁省轻工科学研究院 | Methd for preparing core of hollow ceramic |
| CN101607301A (en) * | 2008-06-18 | 2009-12-23 | 中国科学院金属研究所 | A kind of soluble core and preparation method thereof |
| CN103157763A (en) * | 2011-12-16 | 2013-06-19 | 洛阳奇润电力科技有限公司 | Application method of urea core and ceramic core |
| CN103949595A (en) * | 2014-05-24 | 2014-07-30 | 莱芜市泰东粉末科技有限公司 | Manufacturing method of precise cast urea core |
| CN104028699A (en) * | 2014-04-28 | 2014-09-10 | 沈阳明禾石英制品有限责任公司 | Preparation method for guide vane inner ring split combined type hollow ceramic mold core |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63144841A (en) * | 1986-12-09 | 1988-06-17 | Mitsubishi Metal Corp | Production of ceramics mold for precision casting |
-
2014
- 2014-11-12 CN CN201410635563.8A patent/CN104353790B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1055737A (en) * | 1964-03-25 | 1967-01-18 | Wellworthy Ltd | Improvements in casting processes |
| CN1792498A (en) * | 2005-11-29 | 2006-06-28 | 辽宁省轻工科学研究院 | Methd for preparing core of hollow ceramic |
| CN101607301A (en) * | 2008-06-18 | 2009-12-23 | 中国科学院金属研究所 | A kind of soluble core and preparation method thereof |
| CN103157763A (en) * | 2011-12-16 | 2013-06-19 | 洛阳奇润电力科技有限公司 | Application method of urea core and ceramic core |
| CN104028699A (en) * | 2014-04-28 | 2014-09-10 | 沈阳明禾石英制品有限责任公司 | Preparation method for guide vane inner ring split combined type hollow ceramic mold core |
| CN103949595A (en) * | 2014-05-24 | 2014-07-30 | 莱芜市泰东粉末科技有限公司 | Manufacturing method of precise cast urea core |
Non-Patent Citations (2)
| Title |
|---|
| 不锈钢叶轮的熔模精密铸造;杨荣光;《铸造技术》;19860630(第03期);第19-22页 * |
| 水溶性过渡模制造复杂树脂砂芯;曲绵坚;《新技术新工艺》;19850501(第02期);第6-7页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104353790A (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104907492B (en) | A kind of manufacture method towards double wall hollow turbine vane | |
| CN104661775B (en) | There is the housing mould of heat cover | |
| CN103567384B (en) | The method for manufacturing rotor | |
| CN109175307A (en) | A kind of 3D printing sand mold antigravity casting forming method | |
| CN101406932A (en) | Precision-investment casting method | |
| CN103742536A (en) | Casting method for copper bush with high lead bronze content | |
| CN104619441B (en) | Casting pattern | |
| CN105665635B (en) | A kind of casting method of super large thick-wall nodular iron | |
| CN104353790B (en) | The preparation method of closed type space curved surface structural casting core | |
| CN102990043A (en) | Casting production process of shells | |
| US9744587B2 (en) | Mould for monocrystalline casting | |
| CN102706920B (en) | Method for evaluating mixed crystal formation tendency of single-crystal high-temperature alloys | |
| CN106392012A (en) | Design method for nodular cast iron crankshaft curved face parting mold | |
| CN102441644A (en) | Precoated sand core secondary shooting process of casting runner machinery | |
| CN105583374B (en) | A kind of method of production of large aluminum alloy closing casing | |
| CN207057591U (en) | A kind of pick housing of pneumatic pick mold | |
| CN102641989A (en) | Ice fire casting | |
| CN206492923U (en) | A kind of mould of motor case | |
| CN204182868U (en) | The multiple tooth cast iron arbor of a kind of overlength for permanent mold casting | |
| CN209647532U (en) | It is a kind of for casting the sand core of compressor casing | |
| RU2018143346A (en) | METHOD FOR PRODUCING A VALVE HOUSING HAVING ONE OR MORE CORROSION-RESISTANT INTERNAL SURFACES | |
| CN209110109U (en) | A kind of nickel-base high-temperature single crystal alloy Casting Equipment that smart can be controlled three-dimensional crystal and be orientated | |
| CN103464692B (en) | A kind of casting method of tubular cast | |
| CN102274940A (en) | Centrifugal pouring method for water glass investment casting | |
| CN106111941A (en) | The cast auxiliary mould that a kind of aluminum alloy die-casting die is special |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |