JPS5941821B2 - mold making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold making machine, and particularly to a mold making machine suitable for use as a shell mold core making machine.

Generally, in a shell mode core making machine, the movable mold and the fixed mold that make up the mold are brought into close contact with each other, sand is blown into the inside from the outside, the sand is hardened and the core is formed, and then the movable mold and the fixed mold are brought into close contact with each other. The product is obtained by releasing the mold and releasing the core from the mold.

In this core molding machine, in order to prevent damage to the product if it falls due to mold release, the mold is reversed by an inverting device after molding, and then the product is taken out by an extrusion device independent of the inverting device. ing.

Therefore, air cylinders are required for each of the reversing device and the extrusion device, making the device complicated and large, making it difficult to make it inexpensive.

In addition, in conventional core molding machines, the mold is attached to the molding machine die base with hexagonal bolts, or clamps,
It is used by tightening it to the molding machine die base using a clamp using an air cylinder.

However, with bolt tightening, it takes time to loosen and tighten the bolts, and it takes time to set up the bolts.

Also, when using a clamp or air cylinder,
The mechanism is complicated and large, and cannot be made inexpensively.

Furthermore, in the past, it was necessary to attach and remove the mold while suspending the mold using a hoist or the like, which made the mold replacement work extremely troublesome.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a mold making machine that can easily release a mold with a simple device without damaging the mold. With the goal.

In a mold making machine, the present invention provides a movable die base that is movable in parallel on a base frame, a movable mold that is removably fixed to the movable die base with a clamp, and a reversible mold that is disposed on the base frame. a fixed die base that is rotatable about an axis, faces the movable die base when standing upright, and is approximately parallel to the base frame when reversed; and a mold that is removably fixed to the fixed die base with a clamp. A fixed mold whose surface can be brought into close contact with the mold forming surface of the movable mold, and when the fixed die base is reversed, the reversing action is utilized to insert the cavity formed in the fixed die base into the fixed mold. fixed-side extrusion in which the mold adhering to the fixed mold is released by pressing an extrusion pin whose tip forms a part of the molding surface of the fixed mold and extruding the extrusion pin toward the tip; The above object is achieved by providing a rod.

In addition, the fixed extrusion rod and the clamp are made removable, and a matching key is provided to hold the movable mold and the fixed mold in close contact when replacing the molds, thereby facilitating mold replacement work.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, this embodiment includes a movable die base 16 that is moved in parallel by a mold opening/closing cylinder 14 along a mold opening/closing guide 12 formed on the upper surface of a base frame 10; A movable mold 20 is removably fixed to the top by a removable lamp 18.
and a fixed die which is rotatably moved by a reversing cylinder 24 about an inverting shaft 22 provided on the base frame 10, faces the movable die base 16 when standing upright, and is approximately parallel to the base frame 10 when reversing. A die base 26, a fixed mold 30 which is removably fixed to the fixed die base 26 by a removable ramp 28 and whose mold molding surface 30a can be brought into close contact with the mold molding surface 20a of the movable mold 20, and a base frame. When the fixed die base 26 is reversed, the hollow space 26 formed in the fixed die base 26 is removably disposed on the fixed die base 10 by utilizing the reversing operation.
a, and press the extrusion plate 32 and extrusion pin 34 (see FIG. 9), which are disposed inside the fixed mold 30 and whose tips form a part of the mold modeling surface 30a of the fixed mold 30. By pushing out the push-out pin 34 toward the tip,
A stationary extrusion rod 38 that releases the core 36 attached to the stationary die 30, and a stationary extrusion rod 38 that releases the core 36 attached to the stationary die 30, and a stationary side push-out rod 38 that releases the core 36 attached to the stationary die 30, and a push-out rod 38 that releases the core 36 attached to the stationary die 30, and when exchanging the die, the movable die 20 and the stationary die 30.
and a matching key 40 that holds the keys in close contact with each other.

In the figure, reference numeral 42 denotes a mold exchange roller frame 4 disposed on the side of the base frame 10 for moving the movable mold and fixed mold that are held in close contact during mold exchange;
4 is a blow head for blowing sand into the mold forming part formed by the movable mold 20 and the fixed mold 30; 46 is a blow head lifting cylinder that raises and lowers the blow head 44 as needed; This is a sand replenishment valve that replenishes sand.

As shown in FIGS. 2 and 13, the stationary push rod 38 is detachably held on the surface of the base frame 10 by a push rod holder 50 provided on the surface of the base frame 10.

Each of the clamps 18, 28 includes a clamp base 54, a camshaft 56 rotatably supported by the clamp base 54, and a camshaft 56 fixed to the camshaft 56, as shown in FIGS. 4 to 6. The movable die base 1
By inserting a part of the clamp base 54 into a clamp holder 52 formed on the side surface of the movable die base 16 or the fixed die base 26, the clamp base 54 is removably attached to the movable die base 16 or the fixed die base 26.

In the figure, 62 is a clamp opening/closing bundle for rotating the camshaft 56 when the clamp is opened/closed, and 64 is a mold fixing pin.

The action will be explained below.

As shown in FIG. 7, the fixed mold 30 and the movable mold 20, which are attached to the fixed die base 26 and the movable die base 16 by a pair of clamps 28, 18, respectively, are held in a mold closed state by the mold opening/closing cylinder 14 and the reversing cylinder 24. A core 36 is formed in the hollow portions formed in the fixed mold 30 and the movable mold 20 by sand blown from the blow head 44 which is pressed from below by the blow head elevating cylinder 46.

When the sand blowing from the blow head 44 is completed, the unhardened sand in the center of the core 36 is collected by the blow head 44, a hollow core 36 is formed, and the sand is removed from the blow head 44.
is lowered by the blow head lifting cylinder 46.

After the core 36 is completely hardened, when the movable mold 20 is moved back by the mold opening/closing cylinder 14, the movable side extrusion device 66 disposed on the movable mold 20 is opened and compressed, as shown in FIG. The return force of the spring 68 moves the movable push-out rod 70 forward, which moves the push-out plate 72 and push-out pin 74 of the movable mold 20 forward, leaving the core 36 completely in the fixed mold 30 and completing the mold opening.

At this time, the movable mold 20 is opened in parallel to the base frame 10 by the mold opening/closing guide 12 attached to the movable die base 16.

Next, as shown in FIG. 9, the fixed die base 26 is rotated by the reversing cylinder 24 about the reversing shaft 22 in the counterclockwise direction in the figure.

Then, in the middle of the process, the fixed side extrusion rod 38 attached to the base frame 10 moves to the fixed die base 26.
The core 36 is inserted through the cavity 26a provided in the mold 30 and comes into contact with the extrusion plate 32 of the fixed mold 30, and the extrusion plate 32 is moved forward, and the core 36 is released upward from the fixed mold 30 by the extrusion pin 34.

Therefore, without separately providing an air cylinder or the like for taking out the core, it is possible to easily release the mold without damaging the core simply by the action of the reversing cylinder.

Next, the mold exchange work will be explained.

That is, when separating the movable die 20 and the fixed die 30 from the apparatus, first, as shown in FIG.
The clamp 18 is attached to the camshaft 56, and the clamp opening/closing handle 62 is attached to the camshaft 56 by rotating it.
Rotate the cam 58, open the clamp lever 60,
Remove the mold fixing pin 64 and attach the movable mold 20 to the movable die base 1.
Release from 6.

Thereafter, when the mold opening/closing cylinder 14 is retracted, only the movable die base 16 is retracted, as shown in FIG.

At this time, the movable mold 20 is held in close contact with the fixed mold 30 by a pair of matching keys 40 attached to the side surfaces of the fixed mold 30 and the movable mold 20.

Thereafter, as shown in FIG. 3, the fixed extrusion rod 38 is pulled upward from the extrusion rod holder 50, and as shown in FIG. Flip around the center.

At this time, since the stationary push rod 38 has already been pulled out, there is nothing that comes into contact with the push plate 32 in the stationary mold 30, and smooth reversal is possible.

After the reversal is completed, the clamp 28 attached to the fixed die base 26 is opened in the same manner as described above, and the clamp 28 is further removed from the clamp holder 52.

Then, the fixed mold 30 and the movable mold 20 can be smoothly slid on the fixed die base 26 and moved onto the mold exchange roller frame 42 on the side, as shown in FIG.

This completes removing the mold without using a hoist or the like.

Installation can be done by reversing the above steps.

In this embodiment, the fixed extrusion rod and the clamp are removable, and a matching key is provided to hold the movable mold and the fixed mold in close contact when exchanging the molds, making the mold exchanging work extremely easy and short. It can be done in time.

In particular, by making the clamp removable, it is now possible to remove the mold from either side, whereas previously the mold could not be removed from the side when the clamp was attached, increasing the degree of freedom in how to replace the mold. There is.

As explained above, according to the present invention, there is no need for a complicated extrusion device for releasing the mold, and there is also no need to connect the extrusion mechanism on the extrusion device side to the extrusion plate on the mold side. This mechanism has an excellent effect in that the mold can be easily taken out.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the overall configuration of a mold making machine according to the present invention, and FIG. 2 shows a fixed side extrusion rod in the above embodiment.
FIG. 3 is a perspective view showing the state in which the push rod holder is attached, FIG. 3 is a perspective view showing the same removed state, FIG. 4 is a perspective view showing the clamp in the above embodiment, and FIG. 5 is a perspective view showing the clamp holder. Figure 6 is a perspective view showing the state in which the clamp is opened using the same clamp opening/closing handle, Figure 7 is a sectional view showing the state in which sand is being blown in in the above embodiment, and Figure 8 is the same. FIG. 9 is a cross-sectional view showing the core being released from the movable mold, FIG. 9 is a cross-sectional view showing the core being released from the fixed mold, and FIGS. 10 to 12 are similar to the above. It is a perspective view showing the mold exchange procedure in an example. 10...Base frame, 12...Mold opening/closing guide, 14...Mold opening/closing cylinder, 16.
...Movable die base, 18, 28...Clamp, 20...Movable type, 22...Reversing axis, 24...Reversing cylinder, 26・・・・・・
・Fixed die base, 30... Fixed type, 36...
... Core, 38 ... Fixed side extrusion rod, 40
・・・・・・Match key.

Claims (1)

[Claims] 1. A movable die base that is movable in parallel on a base frame, a movable mold that is removably fixed to the movable die base with a clamp, and a reversal shaft that is disposed on the base frame. A fixed die base which is rotatably movable as a center, faces the movable die base when standing upright, and is approximately parallel to the base frame when reversed; and a mold forming surface which is removably fixed to the fixed die base by a clamp. a fixed mold that can come into close contact with the mold forming surface of the movable mold; and a mold that is disposed inside the fixed mold by passing through a cavity formed in the fixed die base when the fixed die base is reversed, and the mold has a fixed tip. A fixed-side push-out rod that presses an push-out pin forming a part of the molding surface and pushes the push-out pin toward the tip, thereby releasing the mold attached to the fixed mold. Mold making machine. 2. Claim 1, wherein the fixed side push-out rod and the clamp are removable, and a matching key is provided to hold the movable mold and the fixed mold in close contact when replacing the molds.
The mold making machine described in section.