JPS5941077Y2 - Mold guide and positioning device for injection molding machines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold guide and positioning device for an injection molding machine.

In order to simplify the work when installing a mold into an injection molding machine, a mold guide and positioning device as shown in FIGS. 1 to 3 has conventionally been used.

That is, a pair of mold mounting jigs 3 each having an angular cross-section are fixed to the movable platen 1 and the fixed platen 2 to form recesses 5 into which the mold mounting plates 4 can be inserted.

Furthermore, a stopper 1 having a positioning protrusion 6 is attached to the lower side of the movable platen 1 and the fixed platen 2.

The molds 8, 8 attached to the mold mounting plates 4, 4 on the fixed plate side and the movable plate side, respectively, are inserted from above into the recess 5 formed in this way, and the molds 8, 8 on the fixed plate side and the movable plate side, respectively, are inserted into the protrusion 6 of the stopper γ. The mold mounting plate 4 was positioned by engaging the lower notch 9, and then fixed to the movable platen 1 and the fixed platen 2 by appropriate means such as bolting or clamping.

However, it is not possible to increase the size of the recess 5 formed by the mold mounting jig 3 due to the size of the movable plate 1 and the fixed plate 2, so there is a gap between the mold mounting plate 4 and the recess 5. had to become smaller.

Therefore, when the mold 8 suspended by a hoist or the like is inserted from above, it is necessary to accurately position the mold mounting plate 4 with respect to the recess 5.

This work was very tedious and required a long time.

For this reason, setup work requires labor and time, which ultimately causes a decrease in production efficiency.Therefore, the present invention is designed to ensure that the mold is accurately aligned with the mold mounting part of the mold clamping device of the injection molding machine. It is an object of the present invention to provide a mold guide and positioning device that can reliably mount a mold in a predetermined position even if the mold is lowered from above in a state where the mold is not aligned with the mold.

Hereinafter, the present invention will be explained based on FIGS. 4 to 6 of the accompanying drawings showing embodiments thereof.

The mold guiding and positioning device according to the present invention differs from the conventional one in the following points.

That is, mold guiding slopes 12 of a predetermined size are provided on the upper edges of the movable platen 10 and the fixed platen 11, respectively, on opposing sides (FIG. 4). Mold guide inclined portions 14 are also formed on mutually opposing sides of the upper edges of the respective attached pairs of mold mounting jigs 13 (FIG. 5).

Other points include, for example, that a recess 15 is formed by the mold mounting jig 13 having a rectangular cross-section, and that positioning protrusions 16 are provided on the lower sides of the movable platen 10 and the fixed platen 11, respectively.
There is no difference from the conventional one in that the stopper 1T having the structure is attached.

As shown in FIG. 4, the mold thickness dimension a of the mold clamping device is the mold 18
Make it slightly larger than the mold thickness.

Mold mounting plate 19 of the mold 18 suspended from a hoist etc.
Even if the position is not exactly aligned with the mold clamping device, it is sufficient that it is at least above the mold guiding inclined part 12.

This is because when the mold 18 is lowered, it moves along the mold guide inclined portion 12 that comes into contact with it and is positioned.

As shown in FIG. 6, the dimension C of the recess 15 is
It is slightly larger than the width dimension d of No. 9.

When the mold 18 is lowered from above, the center line of the mold mounting plate 19 and the center of the recess 15 do not need to be exactly aligned.

This is because the lower end of the mold mounting plate 19 is guided by the mold guiding inclined portion 14 on the upper part of the mold mounting jig 13, and is approximately positioned.

When the mold mounting plate 19 is further lowered and the positioning notch 20 provided at the bottom of the mold mounting plate 19 engages with the positioning protrusion 16 of the stopper IT, the mold is finally positioned.

Thereafter, the mold mounting plate 19 is fixed to the movable lock 10 and the fixed platen 11 by bolting or a clamping device, thereby completing the mounting of the mold 18.

Since the present invention has the above-described configuration, the disadvantage of conventional devices that the mold must be accurately positioned relative to the mold clamping device before lowering the mold when installing the mold can be eliminated. Ru.

Therefore, setup time for mold attachment in an injection molding machine is reduced, and productivity is improved.

Furthermore, the operator is freed from troublesome work.

Furthermore, the present invention is extremely economical as it can be implemented by modifying existing equipment without requiring new equipment.

[Brief explanation of the drawing]

Figure 1 is a front sectional view of a mold clamping device equipped with a conventional mold guide and positioning device, Figure 2 is a sectional view taken along line ■-n in Figure 1, and Figure 3 is a plan view of Figure 1. , FIG. 4 is a front sectional view of a mold clamping device equipped with a mold guide and positioning device according to the present invention, FIG. 5 is a sectional view taken along the line V-v in FIG. 4, and FIG. FIG. 10...Movable lock, 11...Fixed plate, 1
2... Inclined part for mold guide, 13... Mold mounting jig, 14... Inclined part for mold guide, 15
...Recess, 16...Protrusion, 17...
...Stopper, 18...Mold, 19...
...Mold mounting plate, 20...notch.

Claims (1)

[Scope of Claim for Utility Model Registration] A mold mounting plate 19 can be inserted by attaching a pair of mold mounting jigs 13 each having an orthogonal cross-section to the movable platen 10 and fixed platen 11 of an injection molding machine. A mold guide and positioning device in which a stopper 1T having a projection 16 that forms a recess 15 and engages with a positioning notch 20 at the lower part of a mold mounting plate 19 is attached to the lower part of a movable platen 10 and a fixed platen 11. In the above, a mold guiding inclined part 12 is provided on the upper end edges of the movable platen 10 and the fixed platen 11 facing each other, and a mold mounting jig 13 is provided.
A mold guiding and positioning device characterized in that a mold guiding inclined part 14 is provided on the upper end edge of the gauges facing each other.