CN108788026B - Automatic demolding mechanism for complex sand core mold for engine casting - Google Patents
Automatic demolding mechanism for complex sand core mold for engine casting Download PDFInfo
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- CN108788026B CN108788026B CN201811028552.8A CN201811028552A CN108788026B CN 108788026 B CN108788026 B CN 108788026B CN 201811028552 A CN201811028552 A CN 201811028552A CN 108788026 B CN108788026 B CN 108788026B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 37
- 238000005266 casting Methods 0.000 title claims abstract description 27
- 230000006978 adaptation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
- B22C19/06—Devices for rapping or loosening the pattern
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention discloses an automatic demolding mechanism for a complex sand core mold for engine casting, which comprises a lower core box and a cavity which is arranged on the lower core box and is matched with the outer contour of the lower part of a sand core, wherein a movable block is arranged in the cavity of the lower core box in a sliding way up and down, the movable block and the cavity enclose a cavity which is matched with the outer contour of the lower part of the sand core, a jacking demolding mechanism capable of jacking up the movable block and the sand core upwards is arranged below the lower core box, and a sliding guide structure is arranged between the lower core box and the movable block. The automatic core-taking device has reasonable structural design, can meet the requirement of automatic mold release during casting, has high efficiency, high core-making precision, low manufacturing cost, convenient use of the mold, and no complicated equipment interface design, and because fewer parts are needed, the mold is very convenient to use and maintain, and can realize automatic core-taking production, and meanwhile, the labor intensity of operators is reduced.
Description
Technical Field
The invention relates to the technical field of casting, in particular to an automatic demolding mechanism for a complex sand core mold for engine casting.
Background
With the expansion and perfection of functions and performances of engines, engine parts are more and more complex, particularly parts such as engine bodies and cylinder covers, which are basically obtained by adopting a casting method, the casting mold is difficult to release due to structural reasons, and a new releasing mechanism is urgently needed to solve the problems.
The common casting mold has only two mold opening directions, so that the parting surface of the sand core can only be one continuous surface, projections in the mold releasing direction are not overlapped, and two mold releasing mechanisms are generally arranged at present aiming at a special complex sand core structure;
one is to increase the mold opening direction, and the common core shooting equipment is provided with four mold opening interfaces, so that the mold opening structure in four directions can be adopted for sand cores with special structures, such as water jacket cores of a machine body.
The other is to make the part of the position where the demolding is impossible into a movable block, eject the movable block together with the sand core during demolding, and then manually take out the movable block.
The first scheme is that for a sand core with a special structure, such as a water jacket core of a machine body, a four-die structure is needed to be adopted to open the die due to the sand cleaning hole structure on the side surface, but for other sand cores, only partial demolding is difficult, if the structure is adopted, the complexity of die design is greatly increased, and the manufacturing cost and the maintenance cost of the die are greatly increased.
The second scheme has a simpler structure, but the labor intensity of field operators can be increased, and the generation efficiency is greatly influenced because the movable blocks are manually taken out and then manually replaced by the molds.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and aims to provide the automatic demoulding mechanism for the complex sand core mould for engine casting, which can automatically demould, has high efficiency and high core-making precision.
In order to achieve the above purpose, the invention provides an automatic demolding mechanism for an engine casting complex sand core mold, which comprises a lower core box and a cavity which is arranged on the lower core box and is adapted to the outer contour of the lower part of a sand core, wherein a movable block is arranged in the cavity of the lower core box in a sliding way up and down, the movable block and the cavity enclose a cavity which is adapted to the outer contour of the lower part of the sand core, a jacking demolding mechanism which can jack up the movable block and the sand core upwards is arranged below the lower core box, and a sliding guide structure is arranged between the lower core box and the movable block.
Further, the jacking demoulding mechanism comprises a base arranged below the lower core box, a first ejector rod which is arranged on the base and is matched with the bottom surface of the cavity, and a second ejector rod which is matched with the bottom surface of the movable block.
Furthermore, the movable block is of a wedge-shaped structure with a large upper part and a small lower part, and an inclined surface structure which is arranged in an outward inclined manner and is matched with the cavity of the lower core box is arranged on the outer end surface of the movable block.
Furthermore, a first hinging seat hinged with the second ejector rod is arranged on the base, and a second hinging seat hinged with the top end of the second ejector rod is arranged at the bottom of the movable block.
Further, the first hinge seat is arranged close to the ejector rod, and the second ejector rod is connected with the first hinge seat and the second hinge seat and is obliquely arranged.
As a further improvement, the sliding guide structure comprises two guide rail structures which are arranged in the lower core box and are parallel to the inclined surface structure, and two sides of the movable block are provided with inclined grooves which are matched with the guide rail structures.
Further, the guide rail structure comprises a guide rail mounting block detachably mounted in the lower core box and a guide rail convexly arranged on the inner side of the guide rail mounting block.
Furthermore, a protruding structure or a concave structure is arranged on one end face of the sand core, and a concave structure or a protruding structure matched with the protruding structure or the concave structure is arranged at the inner end of the movable block.
Further, a connecting rod hinged with the first hinging seat is detachably arranged at the lower part of the second ejector rod; a rotating shaft is arranged between the connecting rod and the first hinging seat, and a rotating shaft is arranged between the second ejector rod and the second hinging seat.
Further, the jacking demoulding mechanism further comprises a jacking device for driving the base to move up and down.
Advantageous effects
Compared with the prior art, the automatic demolding mechanism for the complex sand core mold for engine casting has the following beneficial effects:
(1) The device has reasonable structure, can meet the requirement of automatic demoulding during casting, and has high efficiency and high core making precision;
(2) Compared with a four-die structure, the die has the advantages of simple structure, low manufacturing cost, convenient use of the die, no complicated equipment interface design, and very convenient use and maintenance of the die because of fewer parts;
(3) Compared with the mode of manually taking the movable block, the automatic coring production can be realized, meanwhile, the labor intensity of operators is reduced, and the movable block is reset very accurately due to the adoption of the connecting rod mechanism, so that the manufacturing precision of the sand core is ensured.
Drawings
FIG. 1 is an assembly view of the pre-mold structure of the automatic demolding mechanism for an engine casting complex sand core mold of the present invention;
FIG. 2 is a schematic diagram of the pre-ejector structure of the ejector demolding mechanism of the present invention;
FIG. 3 is an assembly view of the post-ejector structure of the automatic demolding mechanism for an engine casting complex sand core mold of the present invention;
FIG. 4 is a schematic diagram of the post-ejector structure of the ejector demolding mechanism of the present invention;
FIG. 5 is a cross-sectional view of the prior art for stripping the automatic stripping mechanism of the complex sand core mold for engine casting of the present invention;
FIG. 6 is a cross-sectional view of the structure of the engine casting complex sand core mold automatic demolding mechanism of the present invention during demolding;
fig. 7 is a sectional view of the post-mold structure of the automatic demolding mechanism for an engine casting complex sand core mold of the present invention.
In the figure: 1. a core box is arranged; 2. a movable block; 3. a sand core; 4. a cavity; 5. jacking up the demoulding mechanism; 501. a base; 502. a first ejector rod; 503. a second ejector rod; 504. a first hinge base; 505. the second hinge seat; 506. a connecting rod; 6. a guide rail structure; 7. and a chute.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
The specific embodiments of the present invention are as follows: as shown in fig. 1-7, an automatic demolding mechanism for casting complex sand core of an engine comprises a lower core box 1 and a cavity 4 which is arranged on the lower core box 1 and is matched with the outer contour of the lower part of a sand core 3, wherein a movable block 2 is arranged in the cavity 4 of the lower core box 1 in a way that the lower part of the sand core 3 protrudes or is sunken towards one side in a sliding way, the movable block 2 and the cavity 4 enclose a cavity which is matched with the outer contour of the lower part of the sand core 3, a jacking demolding mechanism 5 which can jack up the movable block 2 and the sand core 3 upwards is arranged below the lower core box 1, and a sliding guide structure is arranged between the lower core box 1 and the movable block 2; mounting the core box on core shooting equipment of a corresponding model; the movable block 2 and the cavity 4 are surrounded to form a cavity which is matched with the outer contour of the lower part of the sand core 3 for sand shooting and core making, the sand core 3 is obtained, after the upper core box is opened, the sand core 3 and the movable block 2 are automatically jacked up from the lower core box 1 together through the jacking demoulding mechanism 5, the sand core 3 and the movable block 2 are lifted simultaneously due to the fact that the convex or concave structure of the lower part of the sand core 3 is clamped with the movable block 2, then the movable block 2 and the sand core 3 are slowly separated, the sand core 3 is demoulded, automatic coring production is achieved, meanwhile, the labor intensity of operators is reduced, and the problem that a complex sand core structure is difficult to core during casting production is solved; in addition, the scheme of the invention does not need to design a complicated core box, the die is convenient to use, the complicated equipment interface design is not needed, the efficiency is high, and the core manufacturing precision is high; the sliding guide structure is arranged on the lower core box 1 and the movable block 2, so that the movable block slides stably, and can slide downwards along the sliding guide structure to reset, the resetting is very accurate, and the manufacturing precision of the sand core is ensured.
In this embodiment, the jacking demoulding mechanism 5 includes a base 501 disposed below the lower core box 1, a first ejector rod 502 disposed on the base 501 and adapted to the bottom surface of the cavity 4, and a second ejector rod 503 adapted to the bottom surface of the movable block 2, and the jacking demoulding mechanism 5 further includes a jacking device for driving the base 501 to move up and down, and the base 501 is jacked by the jacking device, and the first ejector rod 502 automatically jack up the sand core 3 and the movable block 2.
In this embodiment, the movable block 2 has a wedge structure with a large upper part and a small lower part, and an inclined surface structure which is arranged in an inclined way and is matched with the cavity of the lower core box 1 is arranged on the outer end surface of the movable block 2, so that the movable block 2 can slide in an inclined way outwards during the rising of the movable block 2, and the movable block 2 is automatically separated from the sand core 3.
In this embodiment, a first hinging seat 504 hinged to a second ejector rod 503 is disposed on the base 501, a second hinging seat 505 hinged to the top end of the second ejector rod 503 is disposed at the bottom of the movable block 2, the second ejector rod 503 connects the base 501 with the movable block 2, and meanwhile, the movable block 2 is convenient to stably control lifting motion, rotatable connection is realized through the second hinging seat 504 and the second hinging seat 505, so as to form a link slider mechanism, and when the movable block 2 slides in an outward deflection manner, relative rotation occurs between the second ejector rod 503 and the first hinging seat 504 and the second hinging seat 505, so that the movable block 2 slides more stably.
In this embodiment, the first hinge seat 504 is disposed close to the ejector rod 502, the second ejector rod 503 is connected to the first hinge seat 504 and the second hinge seat 505 and is obliquely disposed, an included angle between the second ejector rod 503 and the base 501 is greater than 70 ° and smaller than 80 °, so as to prevent the mechanism from locking, ensure smooth demolding, ensure that the acting force direction of the second ejector rod 503 on the movable block 2 is inclined outwards and directed, and is approximately parallel to a plane of the inclined plane structure, so as to facilitate jacking up the movable block 2.
In this embodiment, the sliding guide structure includes two guide rail structures 6 disposed in the lower core box 1 and parallel to the inclined plane structure, two sides of the movable block 2 are provided with inclined slots 7 adapted to the guide rail structures 6, and the movable block 2 can slide upwards along the direction of the inclined plane structure when being jacked up by using the guide rail structures 6 and the inclined slots 7, so that the sliding is stable and the sand core 3 cannot be collided; after demoulding, the movable block 2 also can slide downwards along the guide rail structure 6 and the chute 7, the resetting is accurate, manual correction is not needed, and the casting precision of the sand core 3 is ensured.
In this embodiment, the guide rail structure 6 includes a guide rail installation block detachably installed in the lower core box 1 and a guide rail protruding from the inner side of the guide rail installation block, and a bolt connection assembly is provided between the guide rail installation block and the lower core box 1.
In this embodiment, a protruding structure or a recessed structure is provided on one end face of the sand core 3, a recessed structure or a protruding structure adapted to the protruding structure or the recessed structure is provided on the inner end of the movable block 2, an auxiliary mold structure adapted to the complex structure on the sand core 3 is provided on the movable block 2, and the auxiliary mold structure can be detachably connected with the movable block 2, so that replacement is facilitated, and the invention can be applied to casting of various sand cores.
In this embodiment, a connecting rod 506 hinged with the first hinge base 504 is detachably provided at the lower part of the second ejector rod 503; a rotating shaft is arranged between the connecting rod 506 and the first hinging seat 504, and a rotating shaft is arranged between the second ejector rod 503 and the second hinging seat 505.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these do not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (5)
1. The utility model provides an automatic demoulding mechanism of complex sand core mould of engine casting, includes lower core box (1) and is equipped with die cavity (4) that suits with the outline of sand core (3) lower part on lower core box (1), its characterized in that, can slide from top to bottom in die cavity (4) of lower core box (1) and be equipped with movable block (2), movable block (2) with die cavity (4) enclose into the cavity that suits with the outline of sand core (3) lower part, the below of lower core box (1) is equipped with can jack-up upwards movable block (2), jack-up demoulding mechanism (5) of sand core (3), be equipped with sliding guide structure between lower core box (1) and movable block (2), jack-up demoulding mechanism (5) are including base (501) that locate lower core box (1) below and be equipped with on base (501) with the bottom surface of die cavity (4) suited first ejector pin (502) and with the cavity (2) suited cavity, be equipped with on the inclined plane (503) of second movable block (2) down, be equipped with inclined plane (503) big inclined plane and two on-down side face (503) of the base (2) that are equipped with on the inclined plane (503), the bottom of movable block (2) be equipped with the articulated second articulated seat (505) in top of second ejector pin (503), first articulated seat (504) are close to ejector pin (502) set up, second ejector pin (503) are connected first articulated seat (504) and second articulated seat (505) are arranged with the slope, slip guide structure includes be equipped with in lower core box (1) two be on a parallel with guide rail structure (6) that the inclined plane structure set up, the both sides of movable block (2) be equipped with chute (7) of guide rail structure (6) looks adaptation.
2. An automatic demolding mechanism for casting complex sand cores of engines according to claim 1, characterized in that said guide rail structure (6) comprises a guide rail mounting block detachably mounted in said lower core box (1) and a guide rail protruding from the inner side of the guide rail mounting block.
3. The automatic demolding mechanism for the complex sand core mold for engine casting according to claim 1, wherein a protruding structure or a recessed structure is arranged on one end face of the sand core (3), and a recessed structure or a protruding structure matched with the protruding structure or the recessed structure is arranged at the inner end of the movable block (2).
4. An automatic demolding mechanism for casting complex sand cores of engines according to claim 1, 2 or 3, characterized in that the lower part of the second ejector rod (503) is detachably provided with a connecting rod (506) hinged with the first hinging seat (504); a rotating shaft is arranged between the connecting rod (506) and the first hinging seat (504), and a rotating shaft is arranged between the second ejector rod (503) and the second hinging seat (505).
5. An automatic demolding mechanism for complex sand cores for engine casting according to claim 1, 2 or 3, characterized in that said ejection demolding mechanism (5) further comprises ejection means for driving said base (501) to move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811028552.8A CN108788026B (en) | 2018-09-05 | 2018-09-05 | Automatic demolding mechanism for complex sand core mold for engine casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811028552.8A CN108788026B (en) | 2018-09-05 | 2018-09-05 | Automatic demolding mechanism for complex sand core mold for engine casting |
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| Publication Number | Publication Date |
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| CN108788026A CN108788026A (en) | 2018-11-13 |
| CN108788026B true CN108788026B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811028552.8A Active CN108788026B (en) | 2018-09-05 | 2018-09-05 | Automatic demolding mechanism for complex sand core mold for engine casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113145794B (en) * | 2021-04-29 | 2022-07-08 | 共享装备股份有限公司 | A can type pattern for large-scale cylinder body |
| CN117047032A (en) * | 2023-09-08 | 2023-11-14 | 大连金河铸造有限公司 | Guide rail casting molding method |
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|---|---|---|---|---|
| GB896017A (en) * | 1957-09-05 | 1962-05-09 | Nat Lead Co | Improvements in and relating to die-casting of metals |
| JP2010188640A (en) * | 2009-02-19 | 2010-09-02 | Technocrats Corp | Undercut processing mechanism |
| JP2011218704A (en) * | 2010-04-12 | 2011-11-04 | Technocrats Corp | Undercut processing mechanism |
| CN102847874A (en) * | 2011-06-28 | 2013-01-02 | 郧西精诚汽配有限公司 | Core box loose piece automatic mold release device |
| JP2013086119A (en) * | 2011-10-17 | 2013-05-13 | Honda Motor Co Ltd | Sand core forming mold extruding mechanism |
| CN204018658U (en) * | 2014-06-26 | 2014-12-17 | 北京新立机械有限责任公司 | A kind of ejecting mechanism of casting sand core |
| CN208840458U (en) * | 2018-09-05 | 2019-05-10 | 广西玉柴机器股份有限公司 | A kind of complicated core mold automatic demoulding mechanism of engine casting |
-
2018
- 2018-09-05 CN CN201811028552.8A patent/CN108788026B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB896017A (en) * | 1957-09-05 | 1962-05-09 | Nat Lead Co | Improvements in and relating to die-casting of metals |
| JP2010188640A (en) * | 2009-02-19 | 2010-09-02 | Technocrats Corp | Undercut processing mechanism |
| JP2011218704A (en) * | 2010-04-12 | 2011-11-04 | Technocrats Corp | Undercut processing mechanism |
| CN102847874A (en) * | 2011-06-28 | 2013-01-02 | 郧西精诚汽配有限公司 | Core box loose piece automatic mold release device |
| JP2013086119A (en) * | 2011-10-17 | 2013-05-13 | Honda Motor Co Ltd | Sand core forming mold extruding mechanism |
| CN204018658U (en) * | 2014-06-26 | 2014-12-17 | 北京新立机械有限责任公司 | A kind of ejecting mechanism of casting sand core |
| CN208840458U (en) * | 2018-09-05 | 2019-05-10 | 广西玉柴机器股份有限公司 | A kind of complicated core mold automatic demoulding mechanism of engine casting |
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| CN108788026A (en) | 2018-11-13 |
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