JP3344619B2 - Mobile casting sand injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding machine for receiving a predetermined amount of molding sand conveyed by a belt conveyor or the like into a sand hopper and moving the sand hopper to the upper part of the molding machine. The present invention relates to a mobile casting sand charging device that falls into a casting flask.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned movable molding sand charging apparatus, in order to receive molding sand into a sand hopper, the sand amount is generally controlled by the operation time (timer metering) of a belt conveyor. is there.

[0003]

However, molding sand has a difference in volume due to a change in compactability value (hereinafter referred to as CB value), and molding sand received in a sand hopper is conveyed by the same belt conveyor for the same time. Even when the mold is formed, the volume is different, and the height of the mold after the mold is formed is different, which may cause a mold molding failure. In addition, in the control of the sand amount by timer measurement, if there is an inconvenience such as the absence of foundry sand in a part of the belt conveyor, there is also a problem that the amount of sand put in the sand hopper becomes small and mold molding cannot be performed. there were. The present invention has been made in view of the above-described problems, and measures a substantially constant amount of sand even when the CB value of the foundry sand changes greatly or the foundry sand does not exist in a part of the belt conveyor. Accept
It is an object of the present invention to provide a mobile molding sand charging device that can be dropped into a casting frame of a mold making machine.

[0004]

In order to achieve the above object, the present invention provides a movable casting sand charging device comprising a pair of two load cells at an appropriate distance above and below a traveling end of a frame-shaped truck. In the hollow portion of the frame-shaped carriage, a sand hopper provided with a gate plate at the bottom is suspended by being placed and engaged via a support member correspondingly in contact with the upper portion of the load cell. A guide mechanism that vertically guides the sand hopper is engaged with a front-rear end surface of the sand hopper 7 and a front end of the sand hopper 7. Are provided at appropriate intervals.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. A frame-shaped trolley 2 is mounted on rails 1 and 1 erected at an interval so as to be movable via wheels 3 and 3. A pair of load cells 4, 4 and a pair of receiving members 5, 5 are provided above the left and right ends of the frame-shaped carriage 2 at appropriate intervals, respectively. A sand hopper 7 provided at a lower position in the hollow portion of the frame-shaped trolley 2 so as to be capable of rotating a plurality of gate plates 6, 6 is provided with support members 4 A, 4 A corresponding to the upper portions of the load cells 4, 4. A support member 5A corresponding to an upper portion of the receiving member 5, 5;
It is placed and engaged via 5A and suspended.

The U-shaped receiving guides 8, 8 extending in the vertical direction are attached to the inner surfaces of the traveling front and rear ends of the frame-shaped trolley 2, and the traveling front and rear traveling end outer surfaces of the sand hopper 7 are provided. Has the U-shaped receiving guide 8,
Guide bodies 9, 9 movably ascending and descending are provided in the hollow portion of 8, and a guide mechanism 10 for vertically guiding the sand hopper 7 vertically is configured. Further, the frame-shaped trolley 2
In the lower part of the forward and backward traveling end in the above, the anti-swing stoppers 11, 11 of which the tip (lower end) abuts against the center of the side surface of the sand hopper 7, have an appropriate distance to the left and right (corresponding to the load cells 4, 4 in the embodiment). (A lower position). In the drawing, reference numeral 12 denotes a scraper for removing sand and the like on the upper surface of the rail 1 and reference numeral 13 denotes a sand hopper 7.
Rubber skirt attached to the periphery of the lower end of the casting frame, and is pressed relatively to the upper surface of a casting frame (not shown) to prevent sand leakage when casting sand is charged.

[0007] The operation of the above-described device will be described. In the state shown in the figure, casting sand is supplied to the sand hopper 7 from a belt conveyor (not shown), and the sand hopper 7 descends vertically via the guide mechanism 10, and the load cell 4,
The supply weight is measured by 4 and when the weight of the foundry sand reaches a predetermined weight, the operation of the belt conveyor is stopped. At this time, since the sand hopper 7 is further stably supported by the receiving members 5, 5 and the supporting members 5A, 5A in addition to being supported by the load cells 4, 4 and the supporting members 4A, 4A, accurate weight measurement of the molding sand is performed. Is made. Next, the frame-shaped carriage 2 and the sand hopper 7 are moved leftward in FIG. 1 by the operation of the carriage moving device (not shown), and stopped above the molding flask of the mold molding machine (not shown). At this time, the sand hopper 7 tends to swing in the front-rear direction due to inertia.
Stopped stably by 1 and 11.

Next, after a casting flask (not shown) is raised and brought into close contact with the skirt 13, a number of gate plates 6, 6 are rotated as shown by a chain line in FIG. 2 to remove the molding sand in the sand hopper 7 (not shown). The gate plates 6, 6 are returned to their original state. Next, the bogie moving device (not shown) is operated in reverse, and the frame bogie 2 and the sand hopper 7 are returned to their original positions (rightward).
And the supply of foundry sand to the sand hopper 7 is started again, and the above operation is repeated. The rails 1, 1 are moved by the scrapers 12, 12 with the movement of the frame-shaped carriage 2.
The spilled sand on the top is scraped.

[0009]

As is apparent from the above description, the present invention measures the amount of foundry sand that can be received in the sand hopper by weight that is not affected by changes in the CB value, and shakes the sand hopper during movement. Since the prevention is surely performed, there are various effects such as that the amount of the foundry sand can be accurately measured and received, and the sand caused by the stop of the movement can be prevented and the sand can be quickly introduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

[Explanation of symbols]

 Reference Signs List 2 frame-shaped carriage 4 load cell 4A support member 5 receiving member 5A support member 6 gate plate 7 sand hopper 10 guide mechanism 11 swing prevention stopper

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B22C 15/00 B22C 5/12

Claims (2)

(57) [Claims] 1. A pair of two load cells (4, 4) are arranged at an appropriate interval above a traveling front and rear end of a frame-shaped trolley (2).
A sand hopper 7 provided with a gate plate 6 at a lower portion is placed and engaged with the hollow portion of the frame-shaped carriage 2 via support members 4A and 4A corresponding to the upper portions of the load cells 4 and suspended. ,
A guide mechanism 10 that vertically guides the sand hopper 7 is engaged with a front-rear end surface of the frame-shaped trolley 2 and the sand hopper 7. A movable casting sand dosing device, characterized in that swing preventing stoppers 11, 11, the tips of which contact the center of the side surface of 7, are provided at appropriate intervals. 2. Receiving members 5 and 5 are attached at appropriate intervals to the upper surfaces of the traveling left and right ends of the frame-shaped trolley 2, and the right and left ends of the sand hopper 7 are brought into contact with the upper portions of the receiving members 5 and 5 respectively. 2. The support member 5A, 5A is provided.
The movable casting sand charging device as described in the above.