JPS5853168Y2 - Mold clamping device for casting machines, etc. - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mold clamping device for a casting machine, etc., and in particular, a mold clamping cylinder is disposed near the dieper of a fixed plate, and
A lock bar that connects to the cylinder during mold clamping is provided on the movable plate, and the lock bar is prevented from interfering with the fixed plate when opening the mold, thereby obtaining uniform mold clamping force and making the mold clamping device more compact. Regarding equipment.

In a casting machine, especially a vertical die casting machine, the upper die is attached to a movable plate, the lower die is attached to a lower fixed plate, and the movable plate is guided by a dieper with a die opening/closing cylinder provided on the upper fixed plate to move up and down. In addition to opening and closing the mold, the mold clamping cylinder installed on the upper fixed plate clamps the mold in the closed state.

If the mold is clamped using only the stroke of the mold clamping cylinder, the stroke of the mold clamping cylinder becomes large, and a large mold clamping stroke is required, resulting in a reduction in the vertical dimension of the mold clamping device and, by extension, the casting machine. In addition to simply increasing the size, this also brings about inconveniences such as unnecessarily increasing the strength and rigidity of each part, which increases costs.

In order to improve the above, for example, Utility Model Application No. 52-406 has been proposed, but since the mold clamping force is received by the key and guide plate, it itself requires a considerable strength, in other words, a strength equivalent to the mold clamping force. In addition, the mold clamping cylinder and the dieper are offset, which causes bending, and the fixed guide plate and the like become thicker, making the structure larger and affecting the mold clamping force.

The present inventors devised the present invention in order to solve the above-mentioned problems in conventional mold clamping devices of this type.

The purpose of the present invention is to arrange a mold clamping cylinder near the dieper of a fixed plate, attach a lock bar to the movable plate via a rotating member, and provide an escape hole in the fixed plate that does not interfere with the lock bar. When closing a mold, a rotary member of a movable plate is rotated to engage a lock bar and a mold clamping cylinder to perform mold clamping, and to apply mold clamping force evenly to the movable member, a mold clamping device, and a casting machine. It is an object of the present invention to provide a mold clamping device for a casting machine, etc., which has advantages such as being able to downsize the mold, etc., and simplifying the structure.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1'' is a cutaway front view of the main parts of the casting machine with the mold open, Figure 2
The figure is a cutaway side view of the main parts of the mold in the closed and clamped state. It consists of a movable plate 5 which is located between the upper and lower substrates and a fixed plate and moves up and down while being guided by a dieper 3.

A lower mold 6 is attached to the base plate 2, and an upper mold 7 is attached to the lower surface of the movable plate 5. It is connected to the dieper 3 and moved up and down by the drive of the unit 8, and the upward movement opens the mold as shown in Fig. 1, and the downward movement opens the second mold.
Close the mold as shown.

In the illustrated example, four mold clamping cylinder units 9..., the same number as the diepers 3..., are arranged inside each of the fixing plate 4 in contact with and apart from the diepers 3..., and the units 9... each includes a rod 9a that strokes downward toward the movable plate 5.

On the other hand, on the movable plate 5, four lock pars 10 facing each unit 9 are installed.
The length of the rod 9a of the unit 9 when the mold is closed is
The locking member 10 has a length such that its lower end and its upper end abut each other, and is provided on a rotating plate 11 so as to rotate within a plane on a movable plate 5.

The details of the rotary plate 11 are as shown in FIGS. 4 and 5, and the rotary plate 11 is guided by a plurality of guide rollers 12 on the inner edge of a central circular hole 11a, and is centered around a center 8a. The rotating cylinder unit 14 is connected to the rod 14a of the rotary cylinder unit 14 attached to the movable plate 5, and the stroke of this cylinder unit 14 is connected to the rod 14a of the rotary cylinder unit 14 attached to the movable plate 5. Rotation guided by 12...
Lockers 10 are provided at four locations on the rotary plate 5.

On the other hand, on the fixed plate 4, there is a lockper 10 which is out of phase with the dieper 3... and the mold clamping cylinder unit 9...
Four relief holes 15 corresponding to the units 9 and 15 are vertically penetrated, and the phases of the units 9 and the relief holes 15 are shifted on the rotation locus of the lock par 10. It is provided.

Next, to explain the operation and effect in detail, when the movable plate 5 is raised and the mold is opened, the locking member 10... is moved to the escape hole 15...
The tips of the bars 10 protrude above the fixed plate 4, and the movable plate 5 and the fixed plate 4 approach each other, maintaining the mold open state.

Since the lock par 10... is loosely engaged with the fixed plate 4,
There is no need to ensure the minimum stroke, which is the sum of the bar 10 and the rod 9a of the unit 9, between the movable plate 5 and the fixed plate 4, and the fixed plate 4 and the movable plate 5 can be placed as close together as possible. The overall height of the machine 1 is made as small as possible, making it compact as a whole.

The movable plate 5 is moved downward by the drive of the mold opening/closing cylinder unit 8, and the molds 6 and 7 are closed. In this state, the rotary plate 11 is rotated clockwise in FIG. 4 on the movable plate 5, and this unit This is done in 14 backward strokes.

The rotation limiter 10... is located close to the rod 9a of the mold clamping cylinder unit 9..., and then drives the unit 9..., and by the downward movement of the rod 9a, the locker 10... The unit 9... collides and engages, and the pressure of the unit 9... is the lock par 10...
, the movable plate 5 is pushed down, that is, the mold 6°7 is clamped, as shown in FIGS. 2 and 6.

In this way, only a small mold clamping stroke is required by the engagement between the lockers 10 and the unit 9 when necessary.

After casting, prior to opening the mold, the mold clamping cylinder unit 9 is released, the rotating plate 11 is rotated counterclockwise from FIG.
After adapting the movable plate 5 to the state shown in Fig. 4,
Move up, open the mold, take out the product, and lock par 1
0... do not fit into the relief holes 15... and interfere with the fixed plate 5.

In the illustrated example above, the mold clamping cylinder unit 9 is placed on the fixed plate side,
Further, although the locking member 10 is provided on the movable plate side, it may be reversed, and the rotating mechanism of the rotating plate 11 is not limited to the above.

It goes without saying that the mold clamping device according to the present invention can be employed not only in a casting machine as in the embodiment, but also in a molding machine such as an injection machine.

As is clear from the above, according to this proposal, since the mold clamping device is divided into a transmission section and a driving section, the mold clamping stroke can be minimized, and therefore the mold clamping device, casting machine, etc. can be made more compact. In addition, since the mold clamping cylinder unit is installed close to the dieper, the mold clamping force can be applied evenly to the mold, and good casting can be expected. First, it has many advantages such as being able to achieve the intended purpose with a simple structure and at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a front view of the main parts of the casting machine with the mold open, Fig. 2 is a side view of the casting machine with the mold closed and the mold clamped, and Fig. 3 is the casting machine in the mold-clamped state. FIG. 4 is a plan view of the movable plate in the mold open state, FIG. 5 is a partially cutaway front view of the movable plate, and FIG. 6 is a view similar to FIG. 4 in the mold closed and clamped state. . In the drawings, 1 is a casting machine, 2 is a substrate, 3 is a dieper, 4 is a fixed plate, 5 is a movable plate, 8 is an opening/closing cylinder, 9 is a mold clamping cylinder, 10 is a lock par, 11 is a rotating plate, and 15 is an escape hole. .

Claims (2)

[Scope of utility model registration request] (1) In a mold clamping device such as a casting machine in which the movable plate between the fixed plate and the substrate is guided by a dieper and the mold is opened and closed by a mold opening/closing cylinder, one of the fixed plate and the movable plate is moved. A plurality of mold clamping cylinders are arranged adjacent to the dieper, a rotating plate is attached to the other one, and the same number of lock bars that engage with the mold clamping cylinders at a predetermined rotational position of the rotating plate are attached to the rotating plate. A mold clamping device for a casting machine, etc., characterized in that the member provided with the mold clamping cylinder is provided with a part to avoid interference between the lock bar and the member at a predetermined rotation position of the rotary plate. (2) The casting according to claim 1, wherein the mold clamping cylinder is provided on a fixed plate, the lock bar is provided on a movable plate, and an escape hole for the lock bar is provided on the fixed plate. Mold clamping device for machines, etc.