JPS5750245A - Production of hollow core - Google Patents
Production of hollow coreInfo
- Publication number
- JPS5750245A JPS5750245A JP12405880A JP12405880A JPS5750245A JP S5750245 A JPS5750245 A JP S5750245A JP 12405880 A JP12405880 A JP 12405880A JP 12405880 A JP12405880 A JP 12405880A JP S5750245 A JPS5750245 A JP S5750245A
- Authority
- JP
- Japan
- Prior art keywords
- core
- sand
- mold
- packing
- port
- 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.)
- Granted
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Abstract
PURPOSE: To prevent fine holes from clogging, facilitate discharging of uncalcined sand owing to a high pressure gas and improve the yield of core sand by ejecting a low pressure gas through the fine holes provided on the side opposite from a hollow core forming cavity packing and discharging port during packing of the core sand.
CONSTITUTION: During packing of core sand, a 4-way 3-position valve 13 is changed over to feed compressed air from a compressed air source 14 to a low pressure side reducing valve 17 and to eject it under prescribed low pressure into a cavity 3 through a piping 15 then through a nipple 8, a lead hole 7, and the fine holes 11, 11 of a cap 6, thereby packing core sand 12 through the packing and discharging port 4 of a metal mold in an erecting position. Next, the mold 1 is heated to calcine and mold a core 2 at the preset thickness from the inner side surface of the cavity 3. Thence, the mold 1 is put in an inverted position via revolving shafts 18, 18, and the unifired sand 12' in the core 2 is discharged by gravity through the port 4; at the same time, the valve 13 is changed over to a high pressure side reducing valve 17' to eject high pressure air through the holes 11, 11, thereby forcibly discharging the uncalcined core sand 12' through the port 4. Thereafter, the mold 1 is opened and the hollow core 2 is obtained.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12405880A JPS5750245A (en) | 1980-09-09 | 1980-09-09 | Production of hollow core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12405880A JPS5750245A (en) | 1980-09-09 | 1980-09-09 | Production of hollow core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5750245A true JPS5750245A (en) | 1982-03-24 |
| JPS6351784B2 JPS6351784B2 (en) | 1988-10-17 |
Family
ID=14875918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12405880A Granted JPS5750245A (en) | 1980-09-09 | 1980-09-09 | Production of hollow core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5750245A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5769150A (en) * | 1995-10-13 | 1998-06-23 | Toyota Jidosha Kabushiki Kaisha | Method for forming hollow core |
| CN104722716A (en) * | 2015-03-09 | 2015-06-24 | 陕西柴油机重工有限公司 | Forming method of complex thin-wall sand core |
-
1980
- 1980-09-09 JP JP12405880A patent/JPS5750245A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5769150A (en) * | 1995-10-13 | 1998-06-23 | Toyota Jidosha Kabushiki Kaisha | Method for forming hollow core |
| CN104722716A (en) * | 2015-03-09 | 2015-06-24 | 陕西柴油机重工有限公司 | Forming method of complex thin-wall sand core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6351784B2 (en) | 1988-10-17 |
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