JPS6050538B2 - Forced return device for push-up connecting plate for lower mold extrusion pin of horizontally split mold making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a forced return device for a push-up connecting plate for a mold ejection pin in a horizontally split mold making machine.

In conventional mold making machines, the attachment mechanism for the connecting plate with the extrusion pins installed is to attach the connecting plate to the push-up plate using bolts and nuts, or to attach the connecting plate to the push-up plate using a hook attached to a rotating shaft that is operated from outside the clamp table. The connecting plate is attached to the push-up plate by opening and closing, but the connecting plate with push-out pins is made using a mold. (The connection between this connecting plate and the push-up plate (which moves up and down by the operation of the push-up cylinder) must be disconnected and the mold removed.

Therefore, since the mold replacement work is carried out in a narrow space,
In the conventional method as described above, the replacement work is time consuming and dangerous.

The present invention has been developed in order to improve the deficiencies of the conventional method, and the gist of the present invention is as specified in each claim above, and the technical configuration as the present invention is By doing so, the mold replacement work can be performed quickly and easily without danger, and the connection between the connecting plate and the push-up plate can be made even more reliable.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention will be explained in more detail with reference to the accompanying drawings showing several examples of the apparatus of the present invention.

FIG. 1 is a partially sectional front view of an example of the apparatus of the present invention, and FIG. 2 is a partially sectional side view taken along line 1--2 in FIG.

1 is a clamp table which is raised and lowered by a lifting cylinder (not shown).

2 indicates a push-up plate, and a push-up plate lifting cylinder (not shown)
As is well known, the clamp table 1 is moved up and down independently of the clamp table 1 by the operation of the clamp table 1.

10 is a push-up connecting plate in which a large number of push-out pins 12 are installed.

Reference numeral 5 denotes a forced return hook for locking the push-up connecting plate 10 to the push-up plate 2, which is fixed to the hook shaft 8.

A hook retaining spring 9 is provided on the hook shaft 8 to keep the extrusion connecting plate 10 locked at all times by the forced return hook 5.
is provided. Reference numeral 7 denotes a lever shaft, which is fixedly attached to the lower mold chuck claw 4, and is attached to the lower mold chuck claw 4 as described later.
Rotates in conjunction with the rotation of.

Reference numeral 23 denotes a meshing portion (meshing clutch) between the hook shaft 8 and the lever shaft 7, and therefore, the hook shaft 8 rotates with the rotation of the lever shaft 7, opening and closing the forced return hook 5.

In addition, 3 shows a bracket, 11 a seal, and 13 a mold side hook, respectively. When replacing the mold of this example having the above-mentioned configuration, the lower mold chuck claw 4 is rotated to release the lower mold (not shown) from the clamp table 1, and at the same time, the lever shaft is 7. Since the dog clutch 23 and the hook shaft 8 are integrated, these assemblies 7, 2
3 and 8 rotate, and accordingly, the hook shaft 8 rotates against the pressure of the hook retaining spring 9, opening the forced return hook 5 and releasing the tension between the push-up plate 2 and the push-up connecting plate 10.

After that, remove the lower mold assembly consisting of the push-up upper connecting plate 10, the ejector pin 12, and the lower mold, set a separate lower mold assembly, and place the lower mold assembly on the clamp table by performing the reverse operation described above. Once tightened, it is possible to proceed to regular molding operations. In the above example, the lever shaft 7 and the hook shaft 8 are connected through the meshing part 23, but an example in which the forced return hook 5 is opened and closed by the cam 6 provided at the end of the lever shaft 7 will be described below.

Fig. 3 is a partially sectional front view showing a specific example, and Fig. 4 is a partially sectional side view taken along the line ■-■ in Fig. 3.
The figure shows the forced return hook 5 in an open state (that is, the push-up plate 2
FIG. 4 is a side view similar to FIG.

In addition, the same symbols as in FIGS. 1 and 2 indicate the same members, and the mechanisms are also the same! It's like that. In this example, a cam 6 is fixed to the end of the lever 7 as shown in the figure, and the cam 6 fixed to the lever shaft 7 rotates in conjunction with the rotation of the lower mold chuck claw 4, and the hook shaft The forced return hook 5 fixed to the mold 8 rotates against the pressure of the hook retaining spring 59, as in the previous example, to release the tension on the push-up connecting plate 10 and facilitate the replacement of the lower mold. It is something. Figure 6 shows the lower mold chuck jaw 4
FIG. 6 is a diagram illustrating the driving of the lever shaft 7, that is, the rotating operation of the lever shaft 7, and FIG. This is a lower mold assembly holding a lower mold 24, and is equipped with wheels 25 on both sides for movement during replacement.

26 indicates a rail for the wheel.

22 is a lower mold chucking cylinder, one of the arm ends of the lower mold chuck claw 4 is connected to one end of the cylinder 22, and the other arm end of the lower mold chuck claw 4 is connected to the cylinder 22. It is connected to the end of the piston rod 20.

In FIG. 6, other symbols indicate the same members as described above. As mentioned above, the lever shaft 7 is fixed to the lower mold chuck claw 4, and therefore the lower mold chuck cylinder 22
When the lower die chuck claw 4 is released (that is, the tension between the lower die assembly 21 and the clamp table 1 is released), the lever shaft 7 simultaneously rotates, and the hook shaft 8 or the cam 6 is rotated as described above. is rotated to release the tension between the push-up connecting plate 10 and the push-up plate 2, and preparation for replacing the lower mold assembly 21 is completed. Although the present invention has been described with reference to illustrated specific examples, the present invention is not limited to these specific examples, and changes and modifications within the gist of the present invention are of course included in the present invention.

The present invention has the above-mentioned configuration and operation mode, and the main effects achieved by the mechanism of the present invention are as follows: (1) The force for attaching and detaching the push-up connecting plate is reduced. The operation is automated by using the rotation of the lever shaft connected to the lower mold chuck jaw.

(2) As is clear from the operation in the previous section (1), the forced return chuck for removing and removing the push-up connecting plate of the lower mold is performed simultaneously with the removal and removal of the lower mold chuck claw, and is built into the lower mold assembly. The push-up connecting plate can be reliably attached and detached.

(3) Due to the above-mentioned operation, work items when replacing the mold are reduced.

(4) There is no mechanism for operating only the push-up connecting plate, that is, there is no unnecessary protrusion during molding.

(5) The structure is simplified.

(6) Since only the lever shaft penetrates to the outside, it is easy to maintain sealing performance.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a partially sectional front view showing one specific example of the present invention, and FIG.
The figures are a partial cross-sectional side view taken along the line ■-■ in FIG. 1, FIG. 3 is a similar front view showing another example of the present invention, and FIGS. 4 and 5 are A similar side view taken along the line, and FIG. 6 is a side view showing the manner in which the lower mold chuck claw and the lever shaft are connected. In the figure, 1 is a clamp table, 2 is a push-up plate,
4 is a lower mold chuck claw, 5 is a forced return hook, 6 is a cam, 7 is a lever shaft, 8 is a hook shaft, 9 is a hook holding spring, 10 is a dozing connecting plate, 12 is an extrusion pin, 20 is a piston rod , 21 is a lower mold assembly, 22 is a lower mold chucking cylinder, 23 is a meshing part, 24 is a lower mold, 25
26 indicates a wheel, and 26 indicates a rail.

Claims (1)

[Claims] 1. In a horizontally split mold making machine, two hook shafts equipped with hook holding springs are provided in parallel in the lower mold clamp table, and a plurality of forced return hooks are provided on the hook shafts. The lever has a lever shaft that is fixedly fixed and rotates in conjunction with rotation of a lower mold chuck driven by a lower mold chuck cylinder that is perpendicular to the hook shaft and provided outside the clamp table; 1. A forced return device for a push-up connecting plate for a lower mold extrusion pin of a horizontally split mold making machine, characterized in that the hook shaft is rotated by rotation of the shaft. 2. A forced return device for a push-up connecting plate for a lower mold ejection pin of a horizontally split mold making machine according to claim 1, wherein the lever shaft and the hook shaft are coupled via a meshing portion. 3. A forced connection plate for a push-up connecting plate for a lower mold ejection pin of a horizontal split mold making machine according to claim 1, wherein the lever shaft is provided with a cam, and the cam is disposed at a position where it comes into contact with a forced return hook. Return device.