JPS5837055B2 - Mold changing device in mold making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold changing device, particularly to a mold changing device in a vertically split mold making machine.

Mold replacement operations for this type of mold making machine are normally performed from above the vise, but the upper plate of the machine frame where the blow head traverse mechanism and molding sand blowing cylinder are installed becomes an obstacle to the replacement work. It is necessary to take measures such as moving the upper plate or the vise device, which makes the mechanism complicated, and furthermore, the work efficiency decreases due to moving relatively thick parts of the device, which is of course dangerous. .

In addition, the replacement work is unstable because the mold is attached and removed with the mold suspended from above the vise device using a crane, etc., and it takes time to position the mold, which requires moving it into the vise from an even higher position. Therefore, the workability is poor and it is dangerous.

In addition to eliminating the drawbacks of the conventional method as described above, the present inventor has realized that the speed can be further increased by applying it to the vertically split mold making machine having the chuck-type mold fixing mechanism that the present inventor proposed earlier. was successful in developing a mold changing device that can also be used as a mandrel mold mounting or mold removal device mounting mechanism.

The present invention will now be described in further detail with reference to the accompanying drawings, which show several examples of the apparatus of the present invention.

FIG. 1 is a front view showing an example of a mold changing device of the present invention installed in a vertically split mold making machine having a chuck-type mold fixing mechanism. It has a mechanism that allows the bogie to traverse on rails 16 installed on the platform 10 by operating a cylinder 17 for traversing the bogie.

This trolley 1 is equipped with a cylinder 8 for raising and lowering an elevating frame 2 provided on the upper part thereof, and is also equipped with four guide rods 6.

The lifting frame 2 has a mold support frame 3 on its upper surface, and this mold support frame 3 is a mechanism that is horizontally moved by a cylinder 9 provided on the lifting frame 2, and a plurality of rollers 4 are mounted on the upper surface. It is equipped with a set mold 14.
15 can be placed on the roller 4.

The mold changing device of the present invention has the above-mentioned structure, and its operating mode will be explained below.

The mold clamping claws 11, 11 of the vice device are each opened, and the movable die plate 13 is also kept open by the operation of the clamp cylinder 21, that is, the state shown in the upper part of FIG. 2 is maintained.

The mold 14.15 is set on the roller 4 of the mold support frame 3 of the trolley 1, which is waiting at a position outside the molding machine shown by B in FIG.
(Set of fixed side mold 14 and movable side mold 15)
The set molds 14 and 15 are then transported and placed, and the set molds 14 and 15 are fixed with stoppers (not shown) or the like so that they do not move on the rollers 4 and for positioning.

The cart 1 on which the set molds 14 and 15 are placed is then moved to the exchange position, that is, directly below the vice device shown in FIG. 3A, by the operation of the cart traverse cylinder 17, and then stopped.

The state is shown in Figures 2 and 3. ○Then, the cylinder 8
As a result of the operation, the mold support frame 3 on which the set molds 14 and 15 are placed is raised together with the lifting frame 2, and the mold support frame 3 on which the set molds 14 and 15 are placed is raised together with the lifting frame 2, and the matching point between the set mold center and the vise device center is reached, that is, as shown in FIGS. 2 and 3.
Stop at the point indicated by O in the figure.

Next, the mold support frame 3 is moved to the left in the figure by sliding on the guide rod 5 by the operation of the cylinder 9.

Therefore, at the stroke end of the cylinder 9 (the position where the set mold moves to the left in the figure), the back surface of the die base 14' attached to the fixed mold 14 of the set mold and the mounting surface of the fixed die plate 12 are in close contact. (See Figure 4) 0Although not shown, the die base 14
′ and the die plate 12 at a predetermined position,
Positioning pins and guide holes facing the pins are respectively installed in the die base on the surface of the die plate 12.

The movable die plate 13 is moved to the left in FIG. 4 by the clamp cylinder 21, and the mounting surface of the die plate 13 is brought into close contact with the back surface of the die base 15' in the same manner as described above.

As described above, the die bases 14' and 15' of the set mold 14.15, which are clamped by the fixed die plate 12 and the movable die plate 13, are attached to each die plate 12.1.
The mold chuck jaws 11, 11 (actuated by jaw clamping cylinders 18, 19, respectively) provided on the die plate 12, 13 are tightened and fixed to the die plate 12, 13 (as shown in FIG. 1).

Note that normally, a die is attached to a die plate via a die base, that is, the die base is normally considered to be a part of the die, but the attachment method of the present invention requires special processing on the die base. Therefore, the mold and die base are explained as separate items.

After the set molds 14 and 15 are fixed as described above, the positioning stopper (not shown) provided on the mold support frame 3 is released from the set mold, and the mold support frame 3 is moved by the operation of the cylinder 8. Then, the elevating frame 2 is lowered (the state shown in FIG. 1).

Next, the metal fittings 20 that set the molds 14 and 15 are removed, and the molds 14 and 1 are
5, the inner surface of the mold is cleaned, a mold release agent is sprayed, etc., and preparations for the molding operation are completed.

Note that the operation for removing the set mold will be obvious to those skilled in the art from the above description.

Note that the cart 1 is stored in position C in FIG. 3 and placed on standby.

Normally, there is no problem in waiting at position A in Fig. 3, but in the case of the device of the present invention, the vise device is reversed 1800 degrees and excess sand falls when molding a hollow mold, so it is necessary to wait at position C. It won't happen.

However, as will be described later, when the mold changing device of the present invention is provided with a suitable jig and operated as a mandrel device, since the vise device does not rotate 180 degrees, it is raised and lowered directly below the position A in FIG. When an unloader or the like is attached to the mold changing device and used for transporting molds, it is kept on standby at position B in FIG. 3 and reciprocated between position A and position A.

FIG. 5 shows a state in which a mandrel mold 30 is attached to the mold changing device of the present invention with a suitable jig, and can be raised and lowered by the operation of the cylinder 8 to be used as a mandrel device.

FIG. 6 shows a state in which a suitable jig is installed in the mold changing device of the present invention and a pallet type unloader 31 is attached, and the formed mold 32 is separated from the stationary side mold 14 onto the repallet type unloader 31. The mold falls and is lowered by the cylinder 8, and at the same time is carried out to position B in FIG. 3 by the operation of the trolley traverse cylinder 17, and the mold can be taken out.

Since the present invention has the above-described structure, the following main functions and effects can be achieved.

(1) Since power is used for each process during die exchange and stroke operation, that is, positioning can be performed reliably, the die exchange operation can be performed quickly.

(2) All replacement work can be performed at a lower position than the vise device, so safety is excellent.

(3) All replacement of heavy items is done by power, so it is quick, accurate, and very safe.

(4) By providing a roller conveyor or the like that communicates with the mold support frame, it is possible to reliably, safely and quickly pull out set molds, etc. into the machine.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a vertically split mold making machine with the mold changing device of the present invention attached, and Figs. 2 to 4 show how the set mold in Fig. 1 is set in the vise device. Fig. 5 is a partial schematic diagram showing a state in which a mandrel mold is attached to the mold changing device of the present invention, and Fig. 6 is a partial schematic diagram showing a state in which a pallet type unloader is attached to the mold changing device of the present invention. This is a schematic diagram, in which 1 is a trolley, 2 is an elevating frame, 3 is a mold support frame, 4 is a roller, 5 is a guide rod for the mold support frame, 7 is a trolley wheel, 8 is an elevating cylinder,
9 is a cylinder for horizontal movement of the mold support frame, 10 is a machine stand, 11
, 11 is a mold chuck claw, 12.13 is a die plate,
1 4, 1 4' are fixed side mold and die base, 1
Reference numerals 5 and 15' indicate a movable mold and die base, and 16 indicates a rail.

Claims (1)

[Scope of Claims] 1. A trolley is provided below the vise device of a vertically split mold-making machine, and has an elevating frame that can be raised and lowered on the upper part of the trolley, and a mold support that can be moved horizontally on the upper surface of the elevating frame. A mold changing device for a mold making machine, characterized by comprising a frame. 2 Mold exchange mounting according to claim 1, in which a plurality of rollers for mounting a set mold are provided on the upper surface of the mold support frame 3 A mandrel mold attachment mechanism is provided on the upper surface of the mold support frame A mold changing device according to claim 1. 4. The mold changing device according to claim 1, comprising a mold carrying-out device attachment mechanism on the upper surface of the mold support frame.