Metal founding – Means to shape a forming surface
Patent
1998-06-11
2000-02-15
Pyon, Harold
Metal founding
Means to shape a forming surface
164181, 164412, B22C 1900
Patent
active
060241608
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an apparatus for drawing a pattern plate upward from a carrier plate that has received the pattern plate from above into a cavity thereof and that carries it along a conveyor.
DESCRIPTION OF THE PRIOR ART
To draw a pattern plate upward from a carrier plate, conventionally bolt holes with threads have been previously formed in the upper surface at the four corners of the pattern plate, and hook bolts are then caused to engage with the holes. After this, wires are secured to the hook bolts, and the pattern plate is hoisted by a crane.
Since this operation requires much manual work, it takes a lot of time. Further, an operation to draw two carrier plates (or a carrier plate comprised of two blocks) held in a carrier plate necessitates different operational sequences, depending on whether the two plates or blocks are drawn upward simultaneously or one of them is drawn upward first. Such an operation has an inherent problem in that it is complicated and therefore is unsafe.
This invention has been conceived to resolve that problem. It aims to provide an apparatus that can draw upward, quickly and safely, two pattern plates simultaneously or one of them, from a carrier plate which holds them.
SUMMARY OF THE INVENTION
To the above end, the apparatus of this invention, for drawing a pattern plate upward from a carrier plate that holds the pattern plate and carries it along a transport path, comprises a first lifting cylinder having an upwardly extendable piston rod and that is fixedly disposed below the transport path, a mount table secured to the tip end of the first lifting cylinder piston rod, and second and third lifting cylinders mounted on the mount table in a spaced-apart relationship, the second and third cylinders each having an upwardly extendable piston rod, a mount plate secured to the tip end of the piston rod, and a plurality of draw pins mounted upright on the mount plate.
By moving the first cylinder piston rod upward, the draw pins can be moved into throughbores formed in the bottom of the carrier plate, which is located above the apparatus, and which holds a pattern plate, to thereby push up the pattern plate from the carrier plate. Or, by moving the second or third cylinder piston rod upward, the draw pins of the second or third cylinder can be moved into the throughbores formed in the bottom of the carrier plate to thereby push up the pattern plate from it.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-sectional side view of an embodiment of the apparatus of the present invention.
FIG. 2 is a view taken along line A--A in FIG. 1.
FIG. 3 is a cross-sectional side view similar to FIG. 1, where a pattern plate is drawn upward.
FIG. 4 is a cross-sectional side view similar to FIG. 1, where one of two pattern plates is drawn upward.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The preferred embodiments are now explained in reference to the drawings.
In FIGS. 1 and 2 a frame 20 is fixed on a floor, and a roller conveyor 3 is disposed on the frame such that it acts as a transport path. A carrier plate 2, which holds a pattern plate 1 therein, is positioned on the path 3. Eight throughbores 4, 4A are formed in the bottom of the carrier plate 2.
The carrier plate 2 receives a flask thereon for defining a molding space into which molding sand is charged. Therefore, the pattern plate 1 is fittingly placed in the carrier plate 2 such that it does not move in the carrier plate 2.
Under the transport path a drawing apparatus 30 is mounted on the central part of the frame 20. The frame 20 includes two tie beams 21,21 and four upright members 22, suspended from these tie beams. A horizontal frame member 6 is fixed to the ends of the upright members 22.
A first lifting cylinder 5 is mounted on the frame member 6 such that the piston rod 5A of the first lifting cylinder 5 can extend upward. A mount table 7 is horizontally secured to the tip end of the piston rod 5A. Two opposing and spaced-apart second and third lifting cylinders 8, 8A are mounted o
REFERENCES:
patent: 3618668 (1971-11-01), Dupre
patent: 4744404 (1988-05-01), Sakoda et al.
patent: 4830082 (1989-05-01), Bellis et al.
Matsushita Mitsuyuki
Moribe Yasuo
Taguchi Takahiro
Pyon Harold
Sintokogio Ltd.
Wentink Mark A.
LandOfFree
Pattern plate drawing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pattern plate drawing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pattern plate drawing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1898220