JP2798196B2 - Mold making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold making apparatus for making two or more types of sand molds with a single facility.

[0002]

2. Description of the Related Art Conventionally, when a large number of types of sand molds are molded by using a casting frame circulated while exchanging a plurality of model plates by one unit and a filling frame arranged at a molding position, the highest cost is required. A filling frame is created and used according to the model plate that requires sand height. The filling of the filling frame with sand is such that casting sand is supplied to the filling frame so as to form a pile, and the upper surface of the filling frame is scraped by a scraper so that squeezing can be performed. In addition, it is easy to control the supply amount of the molding sand to the filling frame, but when the supply amount is small, it becomes difficult to stir the molding sand inside the filling frame,
Actually, there was a problem that a mold cannot be formed. For this reason, the method of filling the molding sand (full filling frame) as described above has been adopted, and the waste of the molding sand has been increased.

The present invention has been made in view of the above-mentioned problems, and is used as an assembling structure of a frame height for supplying and filling an appropriate amount of molding sand to various model plates. It is an object of the present invention to provide a mold making apparatus capable of eliminating the problem.

[0004]

Means for Solving the Problems In order to achieve the above object, a mold making apparatus according to the present invention comprises a mold making head which is provided above a mold making position on a mold making line so as to be able to move in and out of the mold making head. In the position between the mold making line and the mold making head, a first filling frame is disposed so as to be able to move up and down, and a second filling frame is detachably provided on the lower surface of the mold making head via a drive clamp, and The present invention is characterized in that a clamping mechanism for clamping the extension frame is provided on both sides of the first frame.

[0005]

According to the present invention, the above-mentioned solution is adopted, and when the height of the sand is not so required, the first sand can be obtained.
Only the filling frame is used, and the second filling frame is attached to the molding head. Conversely, if the sand height of the embankment is high, a second embankment is connected to the top of the first embankment, and the second embankment is removed from the molding head and used. At the same time, the amount of molding sand supplied from the sand hopper is changed, and the height of the scraper is changed in accordance with the height of each filling frame, so that useless molding sand can be eliminated and mold molding can be performed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A molding table 4 that is moved up and down by a cylinder (not shown) is provided below a mold molding position in a mold molding line composed of a hollow roller 1 and a conveyor frame 2 formed by a hollow conveyor 3. A model plate 6 on which a model 5 is mounted is detachably mounted on the upper surface of the device. A total of four guide pins 7, 7 are erected on the conveyor frame 2 at the mold molding position in the mold molding line at the left, right, front and rear. The guide cylinders 9, 9 attached to the four corner positions are slidably fitted so that the first filling frame 8 can move up and down together with the guide cylinders 7, within a certain range.

[0007] Further, at the four corners of the first filling frame 8 in the front, rear, right and left directions, hooks 10 in the form of upwards are attached so as to be rotatable in the left and right directions around a central portion. Right and left hooks 1 out of 10
The lower ends of 0, 10 are pin-connected to the piston rods 12, 12 of the cylinders 11, 11, respectively.
Are connected by pins to connecting rods 13, 13 which are attached to the head cover portions in a direction extending in the opposite direction to the piston rods 12, 12, respectively. That is, cylinder 1
When the retractable operation of 1, 11 is performed, the left and right key-shaped hooks 1
The lower ends of the hooks 10 and 10 are pulled toward the center of the hollow conveyor 3 and the upper ends of the hooks 10 and 10 are opened outward.
It is configured that the tips of 0 and 10 are turned in the closing direction. The tips of the hooks 10, 10 are connected to the first filling frame 8
Projecting upward from the upper surface of the hook, and is engaged with and disengaged from a hook locking pin described later.

Further, a molding head 14 is provided above the first molding frame 8 at a molding position of the molding line so as to be able to alternately enter and exit a molding sand supply hopper (not shown). The hopper is provided with a sand scraper (not shown) that can change the height of the casting hopper in two stages according to the required amount. Pascal clamp claws 15, 15 are provided at the lower four corner positions at the lower end of the mold making head 14 so as to be openable and closable rightward and downward, and a second filling frame 16 is arranged below the mold making head 14. The flange portion 16A is detachably held by the Pascal clamp claws 15, 15. The flange portion 16 of the second filling frame 16
A hook locking pins 17, 17 to which the tips of the hooks 10, 10 of the first filling frame 8 can be engaged and disengaged are provided at front and rear positions on the left and right sides below the position A. I have. In the drawing, reference numeral 18 denotes a casting frame which is moved on the centering roller 1 of the mold making line, and 19 denotes a squeeze head located inside the mold making head 14, which is raised when compressed air is supplied (arrow in FIG. 2). It is located in the head 14 and is lowered during squeezing so as to be pressed into the second filling frame 16, the first filling frame 8, and further into the casting frame 18.

[0009] In the case of performing the molding from the molding sand supply using the first filling frame 8, the molding sand supply hopper (not shown) connected to the molding head 14 in the state of FIG. Is limited to the amount of sand charged when only the first filling frame 8 is used, and a sand scraper (not shown) provided at the rear portion (the head 14 side) of the casting sand supply hopper is set at a height when the first filling frame 8 is used. Adjust to correspond. Next, the molding table 4 is raised, the casting frame 18 on the hollow roller 1 is scooped by the model plate 6, and the first molding frame 8 is slightly scooped by the casting frame 18 and stopped. 14 is moved outward from above the mold making position, and the casting sand supply hopper is carried into the mold making position. By this operation, the second filling frame 16 is moved to the mold making head 1.
4 together with the mold molding position.

Next, a molding sand supply hopper (not shown) is operated to remove the molding sand from the model plate 6, the casting frame 18, and the first filling frame 8.
Into the space consisting of In this case, the foundry sand has a heaped shape above the first filling frame 8. Next, the casting sand hopper, the mold making head 14 and the like are moved in the opposite direction. The casting sand which has been piled up above the first filling frame 8 by this operation is scraped and leveled by a sand scraper (not shown), and a mold making head 14 is placed above the first filling frame 8 in FIG. It is returned as follows. Next, the molding table 4 is raised, and the upper surface of the first molding frame 8 is pressed against the lower surface of the second molding frame 16 (the mold molding head 14 may be slightly lowered and crimped). After the compressed air is flowed as shown by the arrow in FIG. 2 to pre-compress the molding sand, the squeegee head 19 is lowered to the boundary between the first filling frame 8 and the molding frame 18 to squeeze the molding sand. Thereafter, the same operation as in the normal mold making is performed to return to the state shown in FIG. 1, and the casting frame 8 with the built-in sand mold is returned onto the hollowing roller 1, and is moved on the hollowing conveyor 3 for one casting frame.

Next, when the mold is formed from the supply of the molding sand using the first filling frame 8 and the second filling frame 16, the molding table 4 is raised in the state of FIG.
The upper flask 18 is scooped up, and the
The filling frame 8 is scooped up, and the upper surface of the first filling frame 8 is
Crimp to the lower surface of. In this state, the cylinders 11, 11 are extended and the hooks 10, 10 are rotated to engage the corresponding hook locking pins 17, 17. The clamped state of the second filling frame 16 with the flange portion 16A is released as shown in FIG. Next, the molding table 4 is moved to the lowermost position as shown in FIG. That is, the second filling frame 16 is clamped and held above the first filling frame 8. In this state, the amount of sand fed into the casting sand supply hopper (not shown) is regulated in the same manner as described above in the case of using both filling frames 8 and 16, and the scraping scraper (not shown) is attached to both filling frames 8 and 16.
Adjust according to the height when using.

In this state (FIG. 3), a mold is formed in the same manner as when only the first filling frame 8 is used. In this case, the casting sand is poured from above the second filling frame 16 to form a pile, and the sand is scraped off with a sand scraper based on the upper surface of the second filling frame 16. In the above embodiment, the first filling frame 8 and the second filling frame 16 are used. However, the third filling frame similar to the second filling frame 16 may be used in a three-tiered configuration. In this case, it is necessary to provide the mold making head 14 with a clamp mechanism similar to the pascal clamp claw 15 in order to clamp the middle filling frame. In the embodiment, the hook 10 is used.
Clamps the first filling frame 8 and the second filling frame 16, but other driving clamps such as a Pascal clamp mechanism may be used.

[0013]

According to the present invention, as is apparent from the above description, the second filling frame is detachably attached to the lower surface of the mold making head and is detachably provided on the upper portion of the first filling frame 8 which can be moved up and down. First according to the height or shape of the model used
It is possible to use the filling frame alone or to connect the first filling frame and the second filling frame, and it is possible to perform sand injection according to the required amount of sand and to perform mold molding. Disappears.

[Brief description of the drawings]

FIG. 1 is a partially omitted longitudinal front view showing an embodiment of the present invention.

FIG. 2 is a partially omitted longitudinal front view showing an operation state in the embodiment of the present invention.

FIG. 3 is a partially omitted longitudinal front view showing an operation state in the embodiment of the present invention.

[Explanation of symbols]

 3 Hollowing conveyor 4 Molding table 6 Model plate 8 First filling frame 10 Hook 11 Cylinder 12 Piston rod 13 Connecting rod 14 Molding head 15 Pascal clamp claw 16 Second filling frame 17 Hook locking pin 18 Cast frame

Claims (1)

(57) [Claims] 1. A mold molding head is provided above and below a mold molding position in a mold molding line so as to be able to enter and exit.
A first filling frame is provided so as to be able to move up and down at a position between the mold molding line and the mold molding head at the mold molding position, and a second filling frame is detachably provided on a lower surface of the mold molding head via a driving clamp. And a drive clamping mechanism for clamping the second filling frame on both sides of the first filling frame.