CN110586862A - Large-scale diesel engine cylinder block main oil gallery psammitolite mould - Google Patents
Large-scale diesel engine cylinder block main oil gallery psammitolite mould Download PDFInfo
- Publication number
- CN110586862A CN110586862A CN201910988783.1A CN201910988783A CN110586862A CN 110586862 A CN110586862 A CN 110586862A CN 201910988783 A CN201910988783 A CN 201910988783A CN 110586862 A CN110586862 A CN 110586862A
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- Prior art keywords
- core
- sand
- box
- main oil
- core box
- Prior art date
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Links
- 239000004576 sand Substances 0.000 claims abstract description 46
- 238000003825 pressing Methods 0.000 claims abstract description 37
- 238000007790 scraping Methods 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000003110 molding sand Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 210000000988 bone and bone Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a sand core mould for a main oil duct of a large diesel engine cylinder block, belongs to the technical field of sand core moulds, and solves the problems of poor compactness and rough surface of a sand core made of a scraper plate; the mold comprises a lower core box and an upper core box, wherein the upper core box is detachably connected with the lower core box, the lower core box is provided with a lower cavity for installing a core, the upper core box is provided with a sand filling groove, a pressing block and a pre-scraping plate are movably inserted in the sand filling groove respectively, the bottom of the pre-scraping plate is provided with a sand scraping groove, and the bottom of the pressing block is provided with a sand pressing groove. The invention can ensure the compact sand core and smooth surface and improve the core making efficiency of the sand core.
Description
Technical Field
The invention relates to the technical field of sand core molds, in particular to a sand core mold for a main oil gallery of a large diesel engine cylinder block.
Background
The main oil gallery of the cylinder block of the large marine diesel engine has the size of about phi 90 x 3600. Although it is a simple cylindrical structure, it is easily deformed because the length-diameter ratio of the cylindrical structure is about 40 and it is a slender structure. In order to ensure the strength of the main oil duct sand core of the large diesel engine cylinder body, a core making scheme of placing a core frame and integrally making a core is required to be adopted during core making. The existing manual core making mold comprises a mold frame 10 and a scraper 12, wherein the scraper is placed on the mold frame, a proper amount of molding sand is filled in the mold frame, and the scraper is pushed to make a core along a core rod 11 while being pressed tightly. Although the core manufacturing mode can realize core manufacturing, the sand core has the defects of poor compactness and rough surface, so that the quality of the sand core is poor, and the production requirement cannot be met.
Disclosure of Invention
The invention aims to provide a sand core mould for a main oil duct of a large diesel engine cylinder block, which can ensure compact sand core and smooth surface and improve the core making efficiency of the sand core.
The technical scheme adopted by the invention is as follows:
the utility model provides a large-scale diesel engine cylinder block main oil duct psammitolite mould, includes the core box down, still includes the core box, go up the core box with the core box can dismantle continuously down, the core box is provided with the lower die cavity that is used for installing the core bone down, it is provided with the groove of filling sand to go up the core box, it has briquetting and scraper blade in advance to peg graft in the activity respectively on the groove of filling sand, scraper blade bottom in advance is provided with scrapes the sand groove, the briquetting bottom is provided with presses the sand groove.
Furthermore, the radius of the sand pressing groove is matched with that of the main oil duct sand core, and the radius of the sand scraping groove is larger than that of the sand pressing groove.
Furthermore, two ends of the lower cavity are provided with core support blocks, and two ends of the core are lapped on the core support blocks.
Furthermore, the two ends of the lower cavity are detachably spliced with the core pressing blocks, each core pressing block comprises a connecting part and a positioning part which are integrally formed, the connecting parts are locked at the two ends of the lower core box through bolts, and the positioning parts are spliced in the cores.
Further, the upper core box is provided with a reinforcing beam in the sand filling groove.
Furthermore, a plurality of positioning holes are formed in the lower core box, and the lower core box is connected with the upper core box through the positioning pins.
Furthermore, a top core plate is arranged below the lower core box, a cushion block for separating the lower core box from the top core plate is arranged between the lower core box and the top core plate, a plurality of lower top core rods inserted into the lower core box are arranged on the top core plate, and the top end surfaces of the lower top core rods are flush with the lowest point of the lower cavity.
Furthermore, two ends of the top core plate are also provided with anti-rotation top core rods inserted in the lower core box, and the anti-rotation top core rods are protruded on the bottom surface of the lower cavity.
Further, there are three of the compacts.
Furthermore, both ends of the upper core box are provided with sand discharge holes.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the large diesel engine cylinder block main oil duct sand core mold, the pre-scraper can be used for controlling the sand pressing amount of the subsequent pressing block, the phenomenon that the shape and the size of the sand core are inaccurate due to the fact that the pressing block is not pressed in place is avoided, and meanwhile, excessive sand is prevented from lifting and deforming the molding sand which is not solidified in the pressing section during pressing, so that the accuracy of the sand core is guaranteed.
(2) Be provided with the leg supporting shoe and leg compact heap respectively at leg both ends, can effectively fix the position of leg to produce the deformation of psammitolite when preventing the system core, in addition, set up and prevent that the top core bar can guarantee that the psammitolite can not rotate when the jack-up psammitolite and fall in the commentaries on classics of preventing of leg below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic view of a prior art core-making mold;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of the lower core box of FIG. 2;
FIG. 4 is an enlarged partial schematic view of FIG. 3 at A;
FIG. 5 is a schematic structural view of the upper core box of FIG. 2;
FIG. 6 is a schematic view of the platen of FIG. 2;
FIG. 7 is a schematic diagram of the construction of the pre-screed of FIG. 2;
FIG. 8 is a front view of the top core plate of FIG. 2;
FIG. 9 is a front view of the core compact of FIG. 4;
in the figure, 1, a lower core box, 1a, a lower cavity, 1b, a positioning hole, 2, an upper core box, 21, a reinforcing beam, 22, a sand filling groove, 23, a sand discharge hole, 3, a pressing block, 31, a sand pressing groove, 4, a pre-scraping plate, 41, a sand scraping groove, 5, a cushion block, 6, a top core plate, 61, a lower top core rod, 62, an anti-rotation top core rod, 7, a core bar supporting block, 8, a core bar pressing block, 81, a connecting part, 82, a positioning part, 9, a bolt, 10, a mold frame, 11, a core bar, 12 and a scraping plate.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments, but the present invention is not limited thereto.
Referring to fig. 2 to 9, the sand core mold for the main oil duct of the large diesel engine cylinder block comprises a lower core box 1 and an upper core box 2, wherein the upper core box 2 is detachably connected with the lower core box 1, the lower core box 1 is provided with a lower cavity 1a for installing a core frame 11, the upper core box 2 is provided with a sand filling groove 22, a pressing block 3 and a pre-scraping plate 4 are movably inserted into the sand filling groove 22 respectively, the bottom of the pre-scraping plate 4 is provided with a sand scraping groove 41, the bottom of the pressing block 3 is provided with a sand pressing groove 31, the radius of the sand pressing groove 31 is matched with the radius of the main oil duct sand core, and the radius of the sand scraping groove 41 is larger than the radius of the sand pressing groove 31. The pre-scraping plate 4 can prevent the molding sand from being too much to be pressed in place; the pressing block 3 can improve the compactness of the sand core. The cooperation of the pre-scraper 4 and the pressing block 3 can ensure that the sand core is compact and simple in work and the effect of good surface quality of the sand core is realized. The sand scraping groove 41 can scrape off the excessive molding sand on the surface of the sand core, and the sand pressing groove 31 can press the sand core.
Two ends of the lower cavity 1a are provided with core support blocks 7, and two ends of the core 11 are lapped on the core support blocks 7. The two ends of the lower cavity 1a are also detachably inserted with the core pressing blocks 8, each core pressing block 8 comprises a connecting part 81 and a positioning part 82 which are integrally formed, the connecting parts 81 are locked at the two ends of the lower core box 1 through bolts 9, and the positioning parts 82 are inserted in the cores 11. The position of the core 11 can be fixed by matching the core supporting block 7 and the core pressing block 8; the matching use of the core pressing block 8 and the plug pin 9 can ensure that the sand core is left in the lower core box 1 when the mold is opened, so that the sand core is prevented from being attached to the upper core box 2.
Preferably, the upper core box 2 is provided with a reinforcement beam 21 in the sand-pack groove 22. The reinforcing beam 21 is arranged in the middle of the sand filling groove 22, so that the rigidity of the upper core box 2 can be ensured, and the deformation of the mold is reduced to the minimum.
Preferably, the lower core box 1 is provided with a plurality of positioning holes 1b, and the lower core box 1 and the upper core box 2 are fixedly connected through positioning pins.
Preferably, a top core plate 6 is arranged below the lower core box 1, a cushion block 5 for separating the lower core box 1 from the top core plate 6 is arranged between the lower core box 1 and the top core plate 6, a plurality of lower top core rods 61 inserted into the lower core box 1 are arranged on the top core plate 6, and the top end surfaces of the lower top core rods 61 are flush with the lowest point of the lower cavity 1 a. Two ends of the top core plate 6 are also provided with anti-rotation top core rods 62 inserted in the lower core box 1, and the anti-rotation top core rods 62 are protruded on the bottom surface of the lower cavity 1 a. After the core manufacturing is finished, the anti-rotation top core rods 62 positioned at the two ends of the top core plate 6 can prevent the sand core from turning over and falling off during the core ejecting process.
Preferably, there are three compacts 3. The adjacent pressing blocks 3 are in a working state when the sand is filled and compressed, and the sand core which is not solidified in the compressed section is prevented from being lifted and deformed by excessive molding sand during compression, so that the accuracy of the sand core is ensured.
Both ends of the upper core box 2 are provided with sand discharge holes 23. The excessive molding sand is conveniently discharged in the later stage of core making.
When the sand core mould is used, the upper core box 2 and the lower core box 1 placed on the top core plate 6 are fixed through the positioning pins, the core 11 is placed on the core support block 7 from the sand discharge hole 23 on the end surface of the upper core box 2, then sand is filled in the sand filling groove 22 of the upper core box 2, the pre-scraper 4 is used for scraping the sand core surface from the middle reinforcing beam 21 to two ends, and redundant sand is discharged from the sand discharge holes on the two ends; compress tightly the psammitolite toward the centre from one end with briquetting 3, adorn the core bone compact heap 8, lock with bolt 9, treat the psammitolite solidification, separate upper core box 2, take out bolt 9, take out core bone compact heap 8, take out cushion 5, accomplish the top core through top core board 6, realize the system core of psammitolite, have the characteristics that system core is fast and easy operation is convenient. Not only can improve the production efficiency of the sand core, but also can greatly improve the quality of the sand core.
The above description is only exemplary of the invention, and any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention should be considered within the scope of the present invention.
Claims (10)
1. The utility model provides a large-scale diesel engine cylinder block main oil gallery psammitolite mould, includes lower core box (1), its characterized in that: the sand filling device is characterized by further comprising an upper core box (2), wherein the upper core box (2) is detachably connected with the lower core box (1), the lower core box (1) is provided with a lower cavity (1a) for installing a core rod (11), the upper core box (2) is provided with a sand filling groove (22), a pressing block (3) and a pre-scraping plate (4) are movably inserted into the sand filling groove (22) respectively, a sand scraping groove (41) is formed in the bottom of the pre-scraping plate (4), and a sand pressing groove (31) is formed in the bottom of the pressing block (3).
2. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: the radius of the sand pressing groove (31) is matched with that of the main oil gallery sand core, and the radius of the sand scraping groove (41) is larger than that of the sand pressing groove (31).
3. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: two ends of the lower cavity (1a) are provided with core support blocks (7), and two ends of the core (11) are lapped on the core support blocks (7).
4. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: the lower die cavity (1a) is also detachably inserted with a core pressing block (8) at two ends, the core pressing block (8) comprises a connecting part (81) and a positioning part (82) which are integrally formed, the connecting part (81) is locked at two ends of the lower die core box (1) through a bolt (9), and the positioning part (82) is inserted in the core (11).
5. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: the upper core box (2) is provided with a reinforcing beam (21) in the sand filling groove (22).
6. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: the lower core box (1) is provided with a plurality of positioning holes (1b), and the lower core box (1) is connected with the upper core box (2) through the positioning pins.
7. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: the core pressing plate is characterized in that a top core plate (6) is arranged below the lower core box (1), a cushion block (5) for separating the lower core box (1) from the top core plate (6) is arranged between the lower core box (1) and the top core plate (6), a plurality of lower top core rods (61) inserted into the lower core box (1) are arranged on the top core plate (6), and the top end surface of each lower top core rod (61) is flush with the lowest point of the lower cavity (1 a).
8. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 7, wherein: and two ends of the top core plate (6) are also provided with anti-rotation top core rods (62) inserted in the lower core box (1), and the anti-rotation top core rods (62) are protruded on the bottom surface of the lower cavity (1 a).
9. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine as claimed in claim 1, wherein: the number of the pressing blocks (3) is three.
10. The sand core mold for the main oil gallery of the cylinder block of the large diesel engine according to any one of claims 1 to 9, wherein: and sand discharge holes (23) are formed in the two ends of the upper core box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910988783.1A CN110586862A (en) | 2019-10-17 | 2019-10-17 | Large-scale diesel engine cylinder block main oil gallery psammitolite mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910988783.1A CN110586862A (en) | 2019-10-17 | 2019-10-17 | Large-scale diesel engine cylinder block main oil gallery psammitolite mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110586862A true CN110586862A (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910988783.1A Pending CN110586862A (en) | 2019-10-17 | 2019-10-17 | Large-scale diesel engine cylinder block main oil gallery psammitolite mould |
Country Status (1)
| Country | Link |
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| CN (1) | CN110586862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468701A (en) * | 2020-04-23 | 2020-07-31 | 聊城新泺机械有限公司 | Main oil gallery structure of large machine body and casting preparation method thereof |
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| CN203578694U (en) * | 2013-09-24 | 2014-05-07 | 常州市卓信机电设备制造有限公司 | Box molding machine for sand-mould-following dual-sided compaction of mould plate |
| CN203695877U (en) * | 2013-12-18 | 2014-07-09 | 桐乡合德机械有限公司 | Slender hole sand core forming structure of casting |
| CN106392005A (en) * | 2016-12-08 | 2017-02-15 | 广西玉柴机器股份有限公司 | Water channel core mold of large-sized diesel engine cylinder block |
| CN107824746A (en) * | 2017-11-02 | 2018-03-23 | 广西玉柴机器股份有限公司 | The arbor component of ship machine cross gate core |
| CN207431176U (en) * | 2017-12-05 | 2018-06-01 | 广西玉柴机器股份有限公司 | The water channel sand cores mold of big marine diesel engine cylinder block |
| CN210648362U (en) * | 2019-10-17 | 2020-06-02 | 广西玉柴机器股份有限公司 | Large-scale diesel engine cylinder block main oil gallery psammitolite mould |
-
2019
- 2019-10-17 CN CN201910988783.1A patent/CN110586862A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4063586A (en) * | 1976-02-02 | 1977-12-20 | Erwin Buhrer | Mold forming apparatus with mold flask stabilizing means |
| CN1366473A (en) * | 2000-04-13 | 2002-08-28 | 新东工业株式会社 | Compressing method for casting sand and device therefor |
| JP4600609B1 (en) * | 2010-01-15 | 2010-12-15 | 新東工業株式会社 | Frameless mold making machine |
| CN203578694U (en) * | 2013-09-24 | 2014-05-07 | 常州市卓信机电设备制造有限公司 | Box molding machine for sand-mould-following dual-sided compaction of mould plate |
| CN103537629A (en) * | 2013-11-14 | 2014-01-29 | 宁夏共享集团有限责任公司 | Exhausting method for sand core for core shooting process of cold core box |
| CN203695877U (en) * | 2013-12-18 | 2014-07-09 | 桐乡合德机械有限公司 | Slender hole sand core forming structure of casting |
| CN106392005A (en) * | 2016-12-08 | 2017-02-15 | 广西玉柴机器股份有限公司 | Water channel core mold of large-sized diesel engine cylinder block |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468701A (en) * | 2020-04-23 | 2020-07-31 | 聊城新泺机械有限公司 | Main oil gallery structure of large machine body and casting preparation method thereof |
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