JPS6239873Y2 - - Google Patents
Info
- Publication number
- JPS6239873Y2 JPS6239873Y2 JP1823081U JP1823081U JPS6239873Y2 JP S6239873 Y2 JPS6239873 Y2 JP S6239873Y2 JP 1823081 U JP1823081 U JP 1823081U JP 1823081 U JP1823081 U JP 1823081U JP S6239873 Y2 JPS6239873 Y2 JP S6239873Y2
- Authority
- JP
- Japan
- Prior art keywords
- check valve
- shielding material
- plate
- present
- ventilation hole
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 27
- 238000009423 ventilation Methods 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000004576 sand Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1823081U JPS6239873Y2 (en]) | 1981-02-13 | 1981-02-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1823081U JPS6239873Y2 (en]) | 1981-02-13 | 1981-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57132740U JPS57132740U (en]) | 1982-08-18 |
| JPS6239873Y2 true JPS6239873Y2 (en]) | 1987-10-12 |
Family
ID=29816200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1823081U Expired JPS6239873Y2 (en]) | 1981-02-13 | 1981-02-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6239873Y2 (en]) |
-
1981
- 1981-02-13 JP JP1823081U patent/JPS6239873Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57132740U (en]) | 1982-08-18 |
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