JPS5823515Y2 - Press mold opening/closing device - Google Patents

Description

[Detailed explanation of the invention] After compression molding with a hot press compression molding machine,
Pull out the mold before pressing, lift the upper mold (or upper mold and middle mold) parallel to the lower mold, remove the guide pin, and then lift only the front of the upper mold further, like a crocodile opening its big mouth. After shaping it, take out the product.

This invention relates to a device that automatically lifts the upper mold at a certain high gt and then opens the mouth wide.

Description of examples Its composition A case with medium size will be explained.

Figure 1 shows the entire structure schematically.

Here, rods and the like are shown as single lines.

1. Front, back, left and right are the directions shown by the arrows.

First, I will briefly explain the device that pulls out the mold.

10rj press body, 121d lower die mounting plate, 14&-j
This is a medium-sized mounting plate and a 16ri upper-sized mounting plate.

The model number 18 (not shown) is a frame (Fig. 1).
Illustration of the right side is omitted.

Install the guide rail 20 horizontally and let it guide the rollers 24 at both ends of the rod 220.

Hook the tip of the lower die mounting plate 12 onto the rod 22.

In order to move the rod 22 back and forth, for example, use the large lever 2.
8. Use a link mechanism consisting of a link 30 and levers 32 and 34.

The lower end of the large lever 28 is secured with a slider 36 (which slides only up and down).

Further, the coupling point of the bell crank formed by the levers 32 and 34 is fixed to a shaft 40 (both ends of which are supported on the frame 18) and rotates together with the shaft 40.

The lower end of the lever 34 is connected to the piston rod 44Vc of the hydraulic cylinder 42.

When the piston rod 44 rises, the rod 22 is pulled forward via the link mechanism.

The mounting plates 12, 14, 16 of the lower, middle, and upper molds and the molds move together with the rod 22.

Next is the part regarding the opening/closing mechanism.

Medium-sized arms 48 are provided horizontally slightly outside the left and right sides of the frame 18, and the medium-sized mounting plate 14 is lifted up by the hooks 50 of the arms 48.

The upper end of the lift rod 52 is fixed to the medium-sized arm 48, and the rod 52 is moved up and down correctly by a suitable guide (not shown).

A lower end of the lift rod 52 is coupled to a piston rod 58 of a hydraulic cylinder 56 via a yoke 54.

An upper mold arm 60 is provided slightly outside the medium arm 48, and the upper mold mounting plate 16 can be lifted up by its catch 62.

Connect the upper end of the lift rod 64 with a pin 63 at a position slightly behind the center of the upper mold arm 60 in the front-rear direction (
Figure 4).

A metal fitting 68 is fixed to the lower end of the rod 64, and the oil 70 is
is projected horizontally and is inserted into the end V'cvi of the yoke 72 so that the lift rod 64 can swing back and forth a little (see FIG. 7).

The center of the yoke 72 is fixed to the piston door 6 of the hydraulic cylinder 74.

Further, the cylinder 74 is connected to the piston rod 58 of the cylinder 56 using a connecting fitting 78 (FIGS. 2 and 3).

80 is a driven rod (FIGS. 1 and 4).

This is wider than the lift rod 64.

It is slid up and down by a guide 82 (not shown in FIG. 1) at a position where the rod 64 and the center line (a vertical line passing through the center of the longitudinal width) coincide with each other, and its upper end 800 contacts the lower surface of the upper die arm 60.

1'c L-shaped arm 84 rearward from the upper end of the driven rod 80 (
(an example of a rigid member) is protruded, and its end is connected to the rear end of the upper die arm 60 with a pin 86.

A dog 88 is provided on the lower side of the driven rod 80 so that the driven rod 80 hits the guide 82 when the driven rod 80 rises appropriately.

Effects (1) When the piston rod 58 of the cylinder 56 extends upward, the medium-sized arm 48 is raised horizontally through the yoke 54 and the lift rod 52, and the medium-sized mounting plate 1 is lifted up.
4 (medium size as well Tlc) is lifted.

(2) When the piston rod 58 extends upward, the cylinder 74 is also lifted up via the connecting fitting 78 at the same time (Fig. 3).

Therefore, the yoke 72 coupled to the piston door 6
, lift rod 64, upper mold arm 60, etc., can be lifted.

In this way, the stroke of the cylinder 74 can be shortened.

After the piston rod 58 has stopped, raise the piston door 6 of the cylinder 74.

The upper mold arm 60 rises via the yoke 72, the metal fittings 68, and the lift rod 64, and lifts the upper mold mounting plate 16 (the third
figure).

Then, the guide pin protruding downward from the upper mold (not shown, must be provided to close the mold in the correct position) should be removed from the middle mold.

Note that it is not possible to rotate only the front part of the upper mold mounting plate 16 upward before removing the guide pin.

(3) The upper die arm 60 and the driven rod 80 are connected to the pin 86
, are connected via the L-shaped arm 84, so that when the upper die arm 60 rises, the driven rod 80 also rises together (FIG. 6).

At this time, the center A (FIG. 6) of the load applied to the upper die arm 60 is in front of the pin 63, so the upper die arm 60 at least does not bend backward.

Since the upper mold arm 60 rests on the upper end II800, the front part does not tilt and is lifted horizontally.

0) When the tongue 88 hits the guide 82, the driven rod 80
The rise has stopped.

The upper die arm 6 asks to raise only the lift rod 64 further.
0, open wide around the IT pin 86 on which the upper mold mounting plate 16 is placed (Fig. 7).

At this time, the lift rod 64 is tilted slightly backward.

In this way, the finished product is taken out.

Closing the mold is the opposite.

This concludes the description of the embodiment.

Of course, this idea can also be applied to cases where there is no medium size.

Effects of this invention Since the lift rod 64 and the driven rod are located at the rear of the center of the upper mold arm 60, both sides are wide when the upper mold is opened, making it easy to put your hand in.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings relate to an embodiment of the invention, and FIG. 1 is an explanatory perspective view schematically showing the configuration, and FIGS. 2 and 3 show hydraulic cylinders 56 and 74 connected and operated. FIG. 4 is an explanatory diagram of the mechanism for lifting the upper mold arm 60, and FIG.
7 are explanatory diagrams sequentially showing the operation of the upper die arm 60. FIG. 10 nibless body, 60: upper arm, 64: lift rod, 74: hydraulic cylinder, 80: driven rod, 88
:Dog.

Claims (1)

[Claims for Utility Model Registration] A lower mold mounting plate 12 and an upper mold mounting plate 1 are installed in front of the press body 10.
6 is pulled out horizontally, and an upper die arm 60 with hooks 62 is provided on both left and right sides of the front of the press body 10, and the hooks 62 are attached to both sides of the upper die mounting plate 16 that is pulled out. At the same time, the upper end of the lift rod 64 is pinned at a position rearward from the center of the upper die arm 60, so that the lift rod 64
is lifted by a hydraulic cylinder 74 and allowed to swing slightly back and forth, and a driven rod 80 is provided so as to be able to slide only up and down along the lift rod 4, and its upper end surface 800 is attached to the lower surface of the upper die arm 60. The tip of an arbitrary rigid member protruding from its upper end was pinned to the rear end of the upper die arm 60, and the rise of the driven rod 80 was restricted by being twisted within 740 strokes of the hydraulic cylinder. A press mold opening/closing device characterized by: