CN104874735A - Expendable mold casting method of load reducing valve body - Google Patents
Expendable mold casting method of load reducing valve body Download PDFInfo
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- CN104874735A CN104874735A CN201510258746.7A CN201510258746A CN104874735A CN 104874735 A CN104874735 A CN 104874735A CN 201510258746 A CN201510258746 A CN 201510258746A CN 104874735 A CN104874735 A CN 104874735A
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- valve body
- expendable
- mold
- disappearance
- loading valve
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Abstract
The invention discloses an expendable mold casting method of a load reducing valve body. The casting method comprises the following steps: A, preparing expendable outer and inner molds of the load reducing valve body with polystyrene for backup, wherein the shapes of the expendable outer and inner molds are the same with that of the load reducing valve body; B, filling the expendable inner mold with dry sand from a preformed opening of the expendable inner mold, performing vibration compaction and vacuumizing treatment and sealing the preformed opening of the expendable inner mole with resin sand, so that the expendable inner mold forms a reinforced block; C, combining the expendable inner mold which forms the reinforced block into the expendable outer mold of the load reducing valve body to form an integral mold of the load reducing valve body; D, placing the integral mold of the load reducing valve body into a sand body, filling the sand box with the dry sand and performing vibration compaction and vacuumizing treatment; and E, pouring the sand box from a sprue to complete the casting of the expendable mold of the load reducing valve body. Compared with the prior art, the problems that the valve body is poor in casting quality and high in cost are solved.
Description
Technical field
The present invention relates to casting technology field, especially a kind of lost-foam casting method for off-loading valve body.
Background technology
Off-loading valve body is a kind of more complicated cast member, adopts the manufacture of ordinary sand casting method; Off-loading valve body adopts common sand mold to carry out casting in process of production, and there are the following problems.Due to the back-up sand of core part, to vacuumize difficulty large, when casting, core is easily shifted, therefore, the spool part of the off-loading valve body produced in valve body there will be the phenomenon of wall unevenness, it does not have enough allowance when causing machining piston to seal seam for a moment, its two wall unevenness can cause part strength difference to cause part rejection, and casting cost increases.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of lost-foam casting method of off-loading valve body, with the castability of off-loading valve body difference and the high problem of cost.
The technical scheme that technical solution problem of the present invention adopts is: a kind of lost-foam casting method of off-loading valve body, it is characterized in that comprising following operating procedure:
Employing polystyrene is made the off-loading valve body disappearance external mold identical with easing valve shape and disappearance internal mold by A, for subsequent use;
B, to carry out inserting dry sand, vibration ramming carry out vacuumizing process from the reserved opening of described disappearance internal mold to its inside, close by the reserved opening of resin sand to described disappearance internal mold, described disappearance internal mold is formed and strengthens block;
C, strengthen the described disappearance internal mold of block and be combined to being formed the overall mould forming described off-loading valve body in described off-loading valve body disappearance external mold;
D, the overall mould of described off-loading valve body is put into sandbox, dry sand is inserted and vibration ramming to described sandbox, then vacuumizes process in described sandbox;
E, namely to cast from running channel to described sandbox completes the lost foam casting of this off-loading valve body.
In the lost-foam casting method technical scheme of above-mentioned off-loading valve body, technical scheme can also be more specifically: the degree of packing of described dry sand after vibration ramming is at least 1.65 grams/cm
3.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect: due to disappearance internal mold is inserted in advance dry sand, vibration ramming he vacuumize process, disappearance internal mold is formed and strengthens block, disappearance internal mold is incorporated in off-loading valve body disappearance external mold again and form overall mould, disappearance internal mold is well located, then when casting to overall mould, disappearance internal mold can not be subjected to displacement phenomenon, part quality is good, and casting cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the off-loading valve body disappearance external mold of the off-loading valve body of the embodiment of the present invention.
Fig. 2 is the structural representation of the disappearance internal mold of the off-loading valve body of the embodiment of the present invention.
Fig. 3 is the structural representation of the sandbox of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
A lost-foam casting method for off-loading valve body, it comprises following operating procedure:
Employing polystyrene is made the off-loading valve body disappearance external mold 1 identical with easing valve shape and disappearance internal mold 2 by A, for subsequent use, as depicted in figs. 1 and 2; B, to carry out inserting dry sand, vibration ramming carry out vacuumizing process from the reserved opening of disappearance internal mold 2 to its inside, close by the reserved opening of resin sand to disappearance internal mold 2, disappearance internal mold 2 is formed and strengthens block, the degree of packing of the present embodiment dry sand after vibration ramming is 1.65 grams/cm
3;
C, strengthen the disappearance internal mold 2 of block and be combined to being formed the overall mould forming off-loading valve body in off-loading valve body disappearance external mold 1, as shown in Figure 3;
D, the overall mould stating off-loading valve body is put into sandbox 3, insert dry sand and vibration ramming to sandbox 3, the degree of packing of the present embodiment dry sand after vibration ramming is 1.65 grams/cm
3, then vacuumize process in sandbox 3;
E, namely cast from running channel 4 pairs of sandboxes 3 completes the lost foam casting of this off-loading valve body.
Claims (2)
1. a lost-foam casting method for off-loading valve body, is characterized in that comprising following operating procedure:
A, by employing polystyrene make off-loading valve body disappearance external mold (1) identical with easing valve shape and disappearance internal mold (2), for subsequent use;
B, to carry out inserting dry sand, vibration ramming carry out vacuumizing process from the reserved opening of described disappearance internal mold (2) to its inside, close by the reserved opening of resin sand to described disappearance internal mold (2), make described disappearance internal mold (2) formed strengthen block;
C, strengthen the described disappearance internal mold (2) of block and be combined to being formed the overall mould forming described off-loading valve body in described off-loading valve body disappearance external mold (1);
D, the overall mould of described off-loading valve body is put into sandbox (3), dry sand is inserted and vibration ramming to described sandbox (3), then vacuumizes process in described sandbox (3);
E, casting from running channel to described sandbox (3) namely completes the lost foam casting of this off-loading valve body.
2. the lost-foam casting method of off-loading valve body according to claim 1, is characterized in that: the degree of packing of described dry sand after vibration ramming is at least 1.65 grams/cm
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258746.7A CN104874735A (en) | 2015-05-20 | 2015-05-20 | Expendable mold casting method of load reducing valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258746.7A CN104874735A (en) | 2015-05-20 | 2015-05-20 | Expendable mold casting method of load reducing valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104874735A true CN104874735A (en) | 2015-09-02 |
Family
ID=53942559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510258746.7A Pending CN104874735A (en) | 2015-05-20 | 2015-05-20 | Expendable mold casting method of load reducing valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104874735A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215287A (en) * | 2015-11-05 | 2016-01-06 | 埃维柯精密铸造（安徽）有限公司 | A kind of valve body evaporative pattern and using method thereof |
| CN114054675A (en) * | 2021-11-20 | 2022-02-18 | 和县科嘉阀门铸造有限公司 | Casting process method of cast steel valve body |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493414A (en) * | 2002-10-28 | 2004-05-05 | 王玉和 | Method of casting loading machine large speed changing box body using vanishing mould |
| CN101195150A (en) * | 2007-12-24 | 2008-06-11 | 刘承江 | Production technology method for evanescent mold hollow steel casting |
| CN102328025A (en) * | 2011-08-25 | 2012-01-25 | 陕西理工学院 | Lost foam casting method of balance shaft housing |
| CN102717031A (en) * | 2012-07-02 | 2012-10-10 | 山西模范机械制造有限公司 | Large-scale thin-wall valve body lost foam casting process |
| CN203843150U (en) * | 2014-05-08 | 2014-09-24 | 临汾鹏泰伟业有限公司 | Casting mould for magnesium metal refining kettles |
| CN104475684A (en) * | 2015-01-08 | 2015-04-01 | 广西玉柴机器股份有限公司 | Casting technology of complex shell part |
-
2015
- 2015-05-20 CN CN201510258746.7A patent/CN104874735A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493414A (en) * | 2002-10-28 | 2004-05-05 | 王玉和 | Method of casting loading machine large speed changing box body using vanishing mould |
| CN101195150A (en) * | 2007-12-24 | 2008-06-11 | 刘承江 | Production technology method for evanescent mold hollow steel casting |
| CN102328025A (en) * | 2011-08-25 | 2012-01-25 | 陕西理工学院 | Lost foam casting method of balance shaft housing |
| CN102717031A (en) * | 2012-07-02 | 2012-10-10 | 山西模范机械制造有限公司 | Large-scale thin-wall valve body lost foam casting process |
| CN203843150U (en) * | 2014-05-08 | 2014-09-24 | 临汾鹏泰伟业有限公司 | Casting mould for magnesium metal refining kettles |
| CN104475684A (en) * | 2015-01-08 | 2015-04-01 | 广西玉柴机器股份有限公司 | Casting technology of complex shell part |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215287A (en) * | 2015-11-05 | 2016-01-06 | 埃维柯精密铸造（安徽）有限公司 | A kind of valve body evaporative pattern and using method thereof |
| CN114054675A (en) * | 2021-11-20 | 2022-02-18 | 和县科嘉阀门铸造有限公司 | Casting process method of cast steel valve body |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |
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| WD01 | Invention patent application deemed withdrawn after publication |