CN106694815A - Pump body casting mold and process - Google Patents
Pump body casting mold and process Download PDFInfo
- Publication number
- CN106694815A CN106694815A CN201510537856.7A CN201510537856A CN106694815A CN 106694815 A CN106694815 A CN 106694815A CN 201510537856 A CN201510537856 A CN 201510537856A CN 106694815 A CN106694815 A CN 106694815A
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- core
- cavity
- interior
- interior core
- molten metal
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Abstract
The invention discloses a pump body casting mold. The pump body casting mold comprises an inner sand core and an outer sand core. The outer sand core is arranged outside the inner sand core in a sleeving mode. A mold cavity is formed between the inner sand core and the outer sand core. The outer sand core is provided with a main pouring gate, and the main pouring gate communicates with the mold cavity. A cavity is formed in the inner sand core and used for storing gas subjected to thermal expansion among sand grains. The phenomenon that the expanded gas influences casting forming can be prevented.
Description
Technical field
The present invention relates to casting technology field, more particularly to a kind of pump housing casting mould and its technique.
Background technology
Big opening small cast casting in inner chamber is, it is necessary to core could be realized.Specifically, to casting of molten metal in the die cavity of core composition, after after casting cooling, core is heated loosely, and from opening discharge, eventually forms cast member.Such as Chinese patent（CN104607601A）Disclosed pump housing casting technique.
Because core is irregular, variable thickness makes there is air between sand grains.In casting process, molten metal is flowed into die cavity, and the sand grains temperature moment near molten metal raises, and makes the air meeting first rapid expansion between the sand grains, and the gas of expansion needs discharge.If the small pump housing of core big opening（Such as the self-priming pump pump housing）, largely there is the gas of pressure to be difficult to discharge, can be floated up from motlten metal when causing molten metal not crystallize also.Casting is set to be also easy to produce the bad phenomenons such as perforation, cold shut, stomata, crackle.
The content of the invention
The invention provides a kind of pump housing casting mould and its technique, the difficulty of prior art is overcome, it is more stable to have started a kind of shaping of cast member, pump housing casting mould and its technique.
The invention provides a kind of pump housing casting mould, including interior core and outer core, the outer core is enclosed within outside the interior core, is die cavity between the interior core and the outer core, and main cast gate, the main cast gate and the die cavity insertion are provided with the outer core；
One cavity is set in the interior core, for storing sand grains between expanded by heating gas.
Preferably, the cavity is consistent with the shape of the interior core, and at the inside center of the interior core.
Preferably, cavity described in is provided with the interior core, and the lid being made up for core material of a closed with covers, the lid.
Preferably, opening is provided with the outer core, the opening is connected to form a pipeline with the cavity.
Present invention also offers a kind of pump housing casting technique, comprise the following steps：
（1）Prepare and treat interior core and outer core that casting is matched, main cast gate is set on the outer core；
（2）The outer core is enclosed within outside the interior core die cavity formed for pouring into a mould, the main cast gate and the die cavity insertion；
（3）By the main cast gate to casting of molten metal in the die cavity；
（4）After after molten metal cooling, the outer core is broken into pieces, shake the scattered interior core, and discharge the interior core.
Step（1）In, cavity described in is set in the interior core；To during casting of molten metal, the gas in the interior core near between the sand grains of molten metal first expands in the die cavity, expanded away from after the gas between the sand grains of molten metal in the interior core, the gas of expansion flows into the cavity.
Preferably, opening is provided with the outer core, the opening is connected to form a pipeline with the cavity, and the gas of expansion is discharged from the pipeline.
As a result of above-mentioned technology, pump housing casting mould of the invention is compared with prior art, pump housing casting mould of the present invention, die cavity is cooperatively formed using interior core and outer core, and to casting of molten metal in die cavity, after molten metal cooling, break outer core into pieces, core in dissipating is shaken, interior core is discharged by the opening portion of casting.And one cavity is set in interior sand core internal, and for storing the gas after the expansion of sand grains part, prevent gas from moving in molten metal, influence the shaping of casting.
The present invention is further illustrated below in conjunction with drawings and Examples.
Brief description of the drawings
Fig. 1 is the structural representation of pump housing casting mould of the present invention.
Reference
1 outer core
2 die cavities
3 cavitys
Core in 4
5 pipelines.
Specific embodiment
Specific embodiment of the invention is introduced below by Fig. 1.
As shown in figure 1, a kind of pump housing casting mould, including interior core 4 and outer core 1, outer core 1 is enclosed within outside interior core 4, is die cavity 2 between interior core 4 and outer core 1, and main cast gate, main cast gate and the insertion of die cavity 2 are provided with outer core 1；
One cavity 3 is set in interior core 4, for storing sand grains between expanded by heating gas.
Further technical scheme is that cavity 3 is consistent with the shape of interior core 4, and at the inside center of interior core 4.
Further technical scheme is that a cavity 3 is provided with interior core 4, and the lid being made up for core material of a closed with covers, lid.
Further technical scheme is that opening is provided with outer core 1, and opening is connected one pipeline 5 of formation with cavity 3.
A kind of pump housing casting technique, comprises the following steps：
（1）Prepare and treat interior core and outer core that casting is matched, main cast gate is set on outer core；
（2）Outer core is enclosed within outside interior core the die cavity formed for pouring into a mould, main cast gate and die cavity insertion；
（3）By main cast gate to casting of molten metal in die cavity；
（4）After after molten metal cooling, outer core is broken into pieces, shake core in dissipating, and discharge interior core.
Step（1）In, a cavity is set in interior core；To during casting of molten metal, the gas in interior core near between the sand grains of molten metal first expands in die cavity, expanded away from after the gas between the sand grains of molten metal in interior core, the gas of expansion flows into cavity.
Preferably, opening is provided with outer core, opening is connected to form a pipeline with cavity, the gas of expansion is discharged from the pipeline.
Gas flow direction between arrow represents sand grains in Fig. 1.Core is heated can dispersion.
The cavity is molded, and is, in interior core surface fluting, then to be formed by closed with covers.Used as surge chamber, during casting of molten metal, the gas in interior core near between the sand grains of molten metal first expands the cavity, is expanded away from after the gas between the sand grains of molten metal in interior core, within gas in core near between the sand grains of molten metal first flow into cavity.
When the gas in cavity starts to be expanded into certain pressure, molten metal is crystallized, and the gas of expansion cannot penetrate cast(ing) surface, substantially increases the quality and yield rate of casting.
If casting is big, wall thickness is thin or other reasons such as special-shaped, causes cannot to be made on interior core cavity, or cavity is small, does not reach when requiring, the gas in cavity is exhausted directly to outside by pipeline.The pipeline passes through casting oral area.
Embodiment described above is merely to illustrate technological thought of the invention and feature, its object is to making those skilled in the art will appreciate that present disclosure and implementing according to this, patent of the invention only can not be limited with the present embodiment and use scope, i.e. all equal changes or modification made according to disclosed spirit, still fall in the scope of the claims of the invention.
Claims (6)
1. a kind of pump housing casting mould, it is characterised in that：Including interior core（4）With outer core（1）, the outer core（1）It is enclosed within the interior core（4）Outward, the interior core（4）With the outer core（1）Between be die cavity（2）, the outer core（1）On be provided with main cast gate, the main cast gate and the die cavity（2）Insertion；
The interior core（4）One cavity of interior setting（3）, for storing sand grains between expanded by heating gas.
2. pump housing casting mould as claimed in claim 1, it is characterised in that：The cavity（3）With the interior core（4）Shape it is consistent, and positioned at the interior core（4）Inside center at.
3. pump housing casting mould as claimed in claim 1, it is characterised in that：The interior core（4）On be provided with cavity described in（3）, and the lid being made up for core material of a closed with covers, the lid.
4. pump housing casting mould as claimed in claim 1, it is characterised in that：The outer core（1）On be provided with opening, the opening and the cavity（3）Connection forms a passage（5）.
5. a kind of pump housing casting technique, it is characterised in that：Comprise the following steps：
Prepare and treat interior core and outer core that casting is matched, main cast gate is set on the outer core；
The outer core is enclosed within outside the interior core die cavity formed for pouring into a mould, the main cast gate and the die cavity insertion；
By the main cast gate to casting of molten metal in the die cavity；
After after molten metal cooling, the outer core is broken into pieces, shake the scattered interior core, and discharge the interior core；
Step（1）In, a cavity is set in the interior core；To during casting of molten metal, the gas in the interior core near between the sand grains of molten metal first expands in the die cavity, expanded away from after the gas between the sand grains of molten metal in the interior core, the gas of expansion flows into the cavity.
6. pump housing casting technique as claimed in claim 5, it is characterised in that opening is provided with the outer core, the opening is connected to form a pipeline with the cavity, and the gas of expansion is discharged from the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510537856.7A CN106694815A (en) | 2015-08-28 | 2015-08-28 | Pump body casting mold and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510537856.7A CN106694815A (en) | 2015-08-28 | 2015-08-28 | Pump body casting mold and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106694815A true CN106694815A (en) | 2017-05-24 |
Family
ID=58918628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510537856.7A Pending CN106694815A (en) | 2015-08-28 | 2015-08-28 | Pump body casting mold and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106694815A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923406A (en) * | 2006-09-18 | 2007-03-07 | 苏州工业园区明志铸造装备有限公司 | Cold core |
| CN201361690Y (en) * | 2009-02-06 | 2009-12-16 | 南方汇通股份有限公司 | Whole sand core exhaust structure |
| CN101704093A (en) * | 2009-11-05 | 2010-05-12 | 遵义拓特机械有限公司 | Method for casting pump body of single-stage double-suction centrifugal pump |
| CN202824536U (en) * | 2012-11-09 | 2013-03-27 | 济南方德利模具有限公司 | Improved core |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
-
2015
- 2015-08-28 CN CN201510537856.7A patent/CN106694815A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923406A (en) * | 2006-09-18 | 2007-03-07 | 苏州工业园区明志铸造装备有限公司 | Cold core |
| CN201361690Y (en) * | 2009-02-06 | 2009-12-16 | 南方汇通股份有限公司 | Whole sand core exhaust structure |
| CN101704093A (en) * | 2009-11-05 | 2010-05-12 | 遵义拓特机械有限公司 | Method for casting pump body of single-stage double-suction centrifugal pump |
| CN202824536U (en) * | 2012-11-09 | 2013-03-27 | 济南方德利模具有限公司 | Improved core |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180815 Address after: 225313 Tongtai Road, gang Yang Town, Hailing District, Taizhou, Jiangsu, 18 Applicant after: Pengyang pump industry Taizhou Co., Ltd. Address before: 201206 2 floor of building 13, 27 Jinqiao Road, Pudong New Area Free Trade Zone, Shanghai. Applicant before: SHANGHAI PENGYANG SOLAR ENERGY PUMP INDUSTRY CO., LTD. |
|
| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
|
| WD01 | Invention patent application deemed withdrawn after publication |