JPH0454547U

JPH0454547U -

Info

Publication number: JPH0454547U
Application number: JP9709990U
Authority: JP
Priority date: 1990-09-14
Filing date: 1990-09-14
Publication date: 1992-05-11
Anticipated expiration: 2005-09-14
Also published as: JPH0756104Y2

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例を示す一部切欠断
面正面図、第２図は第１図のＡ部拡大図、第３図
は本考案の第２実施例を示す一部切欠断面正面図
である。７……フレーム、８……カバー、９……弁台、
１０……貫通孔、１１……筒体、１１ａ……フラ
ンジ、１４……シリンダ、１４ａ……ピストンロ
ツド、１５……弁、１５ａ……突起部、２３……
模型板、２４……鋳枠、３１……ブラケツト、３
２……段付ロツド、３３……圧縮コイルばね。 Fig. 1 is a partially cut-away front view showing a first embodiment of the present invention, Fig. 2 is an enlarged view of section A in Fig. 1, and Fig. 3 is a partially cut-away cross-section showing a second embodiment of the present invention. It is a front view. 7... Frame, 8... Cover, 9... Valve stand,
10...Through hole, 11...Cylinder, 11a...Flange, 14...Cylinder, 14a...Piston rod, 15...Valve, 15a...Protrusion, 23...
Model plate, 24... Casting flask, 31... Bracket, 3
2...Stepped rod, 33...Compression coil spring.

Claims

[Claims for Utility Model Registration] 1. After casting molding sand is placed in a molding flask 24 placed on a model plate 23 with vent holes, compressed air is blown into the surface of the molding sand and allowed to flow through the molding sand to form a model plate. 2
3, the molding sand is discharged from the upper end of the flask 24 to pre-compress the molding sand, and the molding sand is then compressed by a compression plate to form a green mold. A surface plate-like frame 7 whose opening can be closed and has a compressed air outlet 6 facing the upper end opening of the flask 24 is provided, and the frame 7 and the frame 7 constitute a compressed air storage tank. A cover 8 is mounted in an airtight manner with the air outlet 6 located inside, and a cylindrical valve stand 9 integrally provided with a flat top lid is mounted on the frame 7 inside the cover 8. The air outlet 6 is installed in an airtight manner with the air outlet 6 located inside, and a through hole 10 that penetrates vertically is provided in the lid of the valve stand 9, and a cylindrical body having a flange 11a at the upper end is provided in the through hole 10. 1
1 so as to be movable up and down a required distance, and an annular seal 13 is provided around the through hole 10 on the upper surface of the valve base 9 to seal between the flange 11a and the upper surface of the valve base 9 when the valve base 9 is lowered. the cover 8
A cylinder 14 whose piston rod 14a penetrates the ceiling wall of the cover 8 in an airtight manner so as to be able to slide up and down is installed on the top, and a cylinder 14 having approximately the same external dimensions as the flange 11a is installed at the bottom of the piston rod 14a. Valve 15 capable of closing the upper end opening of the cylinder 11
A compressed air blowing device for green molding equipment, characterized in that a protrusion 15a is formed on the lower surface of the valve 15 so as to be insertable into the upper end opening of the cylindrical body 11. 2. A bracket 31 is fixed to the lower part of the piston rod 14a of the cylinder 14, and a stepped rod 32 is fitted through the bracket 31 so as to be able to move up and down a required distance. A compressed air blowing device in a green molding facility according to claim 1, characterized in that a compression coil spring 33 having a repulsive force of the same magnitude is wound thereon, and the valve 15 is fixed to the lower end of the stepped rod 32. .