JPH0310423B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mold removal device for a vertically split mold making machine, and more particularly to a mold removal device capable of minimizing the drop of a released mold onto a conveyor.

BACKGROUND TECHNOLOGY Mold making machines, especially reversing (or overturning) sand discharge type mold making machines, have a vice mechanism that rotates upside down, so the position of the downward rotation axis of the mold mounting plate and the installation position of the downward cylinder are Due to the limitations, a mechanism for vertically moving a conveyor or a carrying device such as a tray each time a mold is taken out is designed to make the height difference between the released mold and the carrying tool as short as possible.
In the above-described conventional method for preventing damage to a released mold, the vertical movement of the conveying tool is required during one mold cycle, which poses a problem in shortening the mold cycle.

Problems to be Solved by the Invention The above-mentioned vertical movement of the conveyor is due to the design of the molding machine.
There are various deficiencies in mechanism and operational safety, and the present invention solves these deficiencies and also
This aims to shorten the molding cycle.

Means for Solving the Problems The present inventor has succeeded in developing the present invention as a result of various studies to solve the above problems, and the structure of the present invention is as specified in the claims. DESCRIPTION OF THE PREFERRED EMBODIMENTS A more detailed explanation will be given with reference to the accompanying drawings showing an example in which the mold ejecting device of the present invention is applied to a reversing sand discharge type vertically split mold making machine.

FIG. 1 is a partially sectional front view of the apparatus of the present invention, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a side view taken along line A--A in FIG. 1.

In the drawing, 1 is a molding machine bed, a fixed side is mounted on one side of the bed 1 via a rotating device 4, and a roller 3 and a tire 2 are mounted on the other side of the bed 1.
The movable side is mounted on a rack. Reference numeral 5 denotes a stationary die plate, and as is well known, a stationary extrusion plate 17 and a stationary mold 16 are attached to the die plate 5. A tie bar 6 is installed between the fixed die plate 5 and the movable tire 2, and is a guide bar when the movable mold assembly slides.

Reference numeral 7 denotes a movable tie plate, and a hinge 7' for supporting the rotation axis O of the mold mounting plate 11 is provided below the center of the die plate. An arm 11' projects from the rear surface of the mold mounting plate 11, and the arm 11' is pivotally connected to the tip of the piston rod of the downward cylinder 19 of the movable mold 13.
A mold extrusion cylinder 12 and a movable side extrusion plate 15 are attached to the mold mounting plate 11 as is well known. 8
1 is a conveyor for transporting molds, and has a mechanism that allows the conveyor 8 to be raised and lowered by rotating the vertical adjustment handle 14. 9 is a mold opening/closing cylinder;
18 indicates a mold.

The operation mode of an example in which the apparatus of the present invention is applied to the above-mentioned reversing sand discharge type vertically split mold making machine will be explained.

After the molding sand blown into the molding cavity of the mating mold of the mold making machine has passed a predetermined molding time, the vise is reversed by the operation of the vice rotating device 4 to remove excess sand, and then the reversed vice is returned to its original position. to continue curing.

The mold opening/closing cylinder 9 is operated and at the same time the extrusion plate 17 attached to the stationary mold is operated to open the movable mold assembly to the right in the figure while keeping the mold 18 in the movable mold 13. Next, when the downward cylinder 19 is actuated, the mold assembly turns downward by 90 degrees around the rotation axis O of the hinge 7', and then the extrusion cylinder 12 is actuated to extrude the movable side extrusion plate 17, and the mold 18 is dropped onto the conveyor 8, and the mold is carried out of the molding machine. In addition, the conveyor 8 can be moved outside the rotation range of the movable mold 13 by operating the vertical adjustment handle in advance according to the mold to be used.
Moreover, it is raised and fixed in a position as close as possible.

After the mold is released, the movable mold assembly is returned to the horizontal direction while the extrusion cylinder 12 is returned, and the mold opening/closing cylinder 9 is operated to proceed to the next molding cycle.

Although the example of the inversion sand discharge type molding machine has been described above, the present invention is not limited to this example and can of course be applied to other molding machines.

Effects of the invention (1) Since the conveyor does not move up and down every cycle during take-out, the structure of the conveyor is simple and inexpensive.

(2) The molding cycle is faster because there is no need to move the conveyor up and down.

(3) When workers clean and transport molds, the conveyor does not move up and down, making it safe and easy to work with.

(4) Once the mold is dropped, it can be returned to its original position immediately, which also shortens the cycle.

(5) Since both the opening/closing device and the mold downward device are located within the vise rotation radius, the vise can be opened even during the rotation of reversal and return, and the cycle can be increased in the case of thin-walled molds.

(6) When dropping the mold, there is no need to move the conveyor up and down, and the mold is dropped with the minimum height, so there is no cracking or damage to the mold.

[Brief explanation of the drawing]

1 is a partially sectional front view of the apparatus of the present invention, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a side view taken along line A--A of FIG. 1. In the figure, 1 is the molding machine bed,
2 is a tire, 3 is a roller, 4 is a rotating device, 5 is a fixed die plate, 6 is a tie bar, 7 is a movable die plate, 7' is a hinge, 8 is a conveyor, 9 is a mold opening/closing cylinder, and 10 is a piston rod. ,1
1 is a mold mounting plate, 11' is an arm, 12 is an extrusion cylinder, 13 is a movable mold, 14 is a vertical adjustment handle, 15 is a movable extrusion plate, 16 is a fixed mold, 17 is a fixed extrusion plate , 18 is a mold, 19 is a downward cylinder, and O is a rotating shaft.

Claims (1)

[Scope of Claims] 1. In a mold removal device for a vertically split mold making machine, a movable die plate 7 is slidably attached to a tie bar 6 installed between a fixed side and a movable side, and the movable die A hinge 7' for supporting the rotating shaft 10 of the mold mounting plate 11 is provided below the center of the plate 7,
A mold ejecting device for a vertically split mold making machine, characterized in that an arm 11' projecting from the back of the mold mounting plate 11 is pivotally connected to a piston rod of a downwardly facing cylinder 19 of the movable mold. 2. A mold removal device in a vertically split mold making machine according to claim 1, wherein the mold making machine is of a reversing sand discharge type.