JPH022406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold fixing device for a movable mold mechanism, particularly to a mold fixing device using a hydraulic auto clamp.

In general, a two-color mold mechanism, as shown in Fig. 1, includes a fixed platen 2 having a mold fixing bolster 1, a movable body 4 that can move along a guide rod 3, and a movable body 4 that is rotatable. A rotary plate 6 as a movable plate held by a rotating shaft 5 provided, a movable plate 7 movable by the guide rod 3, and a rotary plate 6 located outside the fixed plate 2 and outside the movable plate 7. injection devices 8 and 9, mold fixing bolsters 10 and 11 fixed to both sides of the rotary plate 6, and molds 12 and 1 held by the mold fixing bolsters 10 and 11.
3, a mold 16 held by the mold fixing bolster 1, and a mold 18 held by the mold fixing bolster 17 attached to the movable platen 7. Ru.

In such a configuration, first, the first resin is injected from the nozzle 9a of the injection device 9 into the molding space formed between the molds 13 and 18 to mold the first molded product. After the first molded product is hardened in the molds 13 and 18, the movable platen 7 is moved rearward to separate the mold 18 from the mold 13. Next, the movable body 4
is moved backward a predetermined distance to separate the mold 12 from the mold 16. In this state, rotate the rotation axis 5 at an angle
Rotate 180 degrees, mold 12 to mold 18, mold 1
3 to face the mold 16, each mold is clamped in the reverse order of the mold separation described above.

In this way, the second resin is injected from the nozzle 8a of the injection device 8 into the molding space formed between the mold 13, the mold 16, and the first molded product, and the second resin is injected onto the first molded product. A second molded product is integrally molded. Thereafter, the two-color molded product made up of the first molded product and the second molded product is removed after the mold 13 is separated from the mold 16 in the same operation as the mold separation order described above.

Incidentally, while the second molded product is being molded by the molds 13 and 16, resin is injected from the nozzle 9a into the molding space formed by the molds 12 and 18 to form the first molded product. After the molded product has been molded, by rotating the rotary shaft 5, the mold 12 is again opposed to the mold 16, and a second molded product is formed by both molds. By repeating such molding processes, two-color molded products can be mass-produced.

In place of the above-mentioned device, there is also known a device in which the rotary shaft 5 is set at a fixed position and the mold 16 and the mold 18 both move toward and away from the rotary shaft 5.

Conventionally, a hydraulic auto clamp 20 as shown in FIG. 2 has been used to attach the die plates 14, 15 of the mold to the mold fixing bolsters 10, 11. The main body 21 of this hydraulic auto clamp 20
A T provided at the tip of the operating pin 22 protruding from the
The mold part 23 is housed in a T-slot 24 formed in the bolsters 10 and 11, and is connected to the actuating pin 2 by supplying hydraulic pressure to the main body 21 via a hydraulic hose 25.
2 moves in the direction of the main body 21, so the main body 21 and T
The die plates 14 and 15 of the mold can be automatically tightened in the direction of the bolsters 10 and 11 with the mold part 23. A plurality of the hydraulic hoses 25 extend from a hydraulic device 26 to each hydraulic autoclamp 20, and air is supplied to the hydraulic device 26 from an air supply device 27. After being converted into hydraulic pressure, it is supplied to each of the hydraulic autoclamps 20, . . . via a plurality of hydraulic hoses 25.

However, according to such a configuration, since the molds 12 and 13 are rotated around the rotating shaft 5, the hydraulic hose 2 is rotated along with this rotation.
5, . . . are twisted, and as a result of this repetition, they gradually become fatigued and break. Furthermore, if a plurality of hydraulic hoses 25, . In addition, in order to solve this problem, hydraulic auto clamp 20
It is conceivable to remove each hydraulic hose 25, etc. after operating the hydraulic hoses 25, etc., but such a method would not only make the work complicated and mass production impossible, but also place a heavy burden on the workers. will be given.

In order to eliminate the above drawbacks, the present invention provides a movable platen or bolster with a hydraulic device consisting of a hydraulic pump and a valve, and a joint part that is connected to the hydraulic pump and connects the air flow path from the air supply device. The object of the present invention is to provide a mold fixing device for a movable mold mechanism that can prevent fatigue and damage to hydraulic hoses.

Hereinafter, one embodiment of the mold fixing device for the movable mold mechanism of the present invention will be described in detail with reference to FIGS. 3 and 4. Components that are the same as those in the conventional example shown in FIGS. 1 and 2 are designated by large numbers.

In the same figure, a solenoid valve 31 to which compressed air is supplied from an air supply device 27 via an air hose 29 is provided on the upper surface of a plate-shaped base 30 that supports a rotating shaft 5 of the movable body 4. 3
1 is connected to an air supply device cylinder 34 via air hoses 32 and 33. The air hose 29 connects to the air supply cylinder 34.
The air hose is branched into an air hose that is connected to the solenoid valve 31 and directly supplies air, and an air hose that is connected to the solenoid valve 31. The solenoid valve 31 switches on/off whether to supply air through the air hose 32 or the air hose 33, thereby controlling the forward and backward movement of the nozzle 34a of the air supply cylinder 34. That is, it controls the vertical motion. This nozzle 34a
supplies air to an air receiver 35 as a joint portion attached to the upper side of the bolster 11. That is, when the solenoid valve 31 is turned on, the nozzle 34a moves downward, seats on the air receiver 35, and is connected to the air receiver 35, and then air directly supplied from the air hose 29 is supplied to the air receiver 35 through the nozzle 34a. . Air from the air receiver 35 is supplied via an air hose to an air tank 36 equipped with a check valve provided on the upper side of the bolster 11, and air from this air tank 36 is supplied via a pipe 37 to the rotating plate 36. is sent to a hydraulic pump 38 provided on the side wall of the hydraulic pump 38.
The hydraulic pressure is converted into hydraulic pressure by the branch pipe 39,
40 to the non-leak valve 41,
It is supplied from this non-leak valve 41 to the main body 1 of the hydraulic auto clamp 20 via a relay 42. In this case, a plurality of hydraulic autoclamps 20, . . . are provided for the bolster 11, and hydraulic pressure is supplied to each hydraulic autoclamp 20, . Further, the bolster 10 is also provided with an air receiver 35a similar to the above.
5a reaches a position facing the nozzle 34a when the rotary disk 6 rotates by half a rotation, and is connected to the nozzle 34a when the rotary disk 6 is stopped. At this time, the solenoid valve 31 is turned off and the nozzle 34a is in an upwardly moving state. In addition, the above repeater 4
2. Hydraulic auto clamp 20,... is bolster 1
A similar arrangement is also provided on the 0 side.

In the above configuration, the operation will be explained below. First, in order to fix the mold 13 on the surface side of the bolster 11, the main body 21 of each hydraulic auto clamp 20,... is set on the die plate 15, and in this state, the solenoid valve 31 is controlled to open the air supply cylinder 34. The nozzle 34a is moved downward, and the nozzle 34
a is seated on the air receiver 35. In this state, air from the air hose 29 is sent to the air receiver 35 via the air supply cylinder 34, and from the air receiver 35 is supplied to the hydraulic pump 38 via the air tank 36. The air from the air tank 36 is converted into hydraulic pressure by the hydraulic pump 38 and then supplied to the non-leak valve 41. Then, by operating the switch 41a of the non-leak valve 41, the hydraulic pressure is applied to the relay 4 provided on the bolster 11.
When the hydraulic pressure is controlled so as to be supplied to the second side, the hydraulic pressure is supplied to each of the hydraulic autoclamps 20, . This allows Bolster 1
1, a die plate 1 to which a mold 13 is fixed
5 can be fixed quickly and reliably. Here, by controlling the solenoid valve 31, the nozzle 34a of the air supply cylinder 34 is connected to the air receiver 3.
5, the hydraulic pressure of the hydraulic auto clamp 20 does not decrease due to the non-leak valve 41, and the hydraulic pressure is kept constant.
There is no risk of the bolt becoming loose or falling off from the bolster 11. In addition, since the check valve of the air tank 36 also operates to ensure safety, the air tank 36
Air inside 6 will not flow backwards. Next, the rotating shaft 5 is rotated 180 degrees, the bolster 10 is positioned on the air supply cylinder 34 side, and the bolster 10 is seated with the nozzle 34a corresponding to the air receiver 35a provided on the upper side. , by supplying air, the hydraulic pump 3
8 can supply hydraulic pressure to the non-leak valve 41. Here, by operating the switch 41b, the hydraulic auto clamps 20, ... provided on the bolster 10 side can be operated,
The die plate 14 of the mold 12 set in advance on the bolster 10 can be fixed by the hydraulic auto clamps 20, . . . .

Therefore, according to the above embodiment, the air receivers 35, 35a are provided on the upper side of the bolsters 10, 11.
A hydraulic device consisting of a hydraulic pump 38 and a non-leak valve 41 is installed on the side of the rotary plate 6, and the movable body 4
The air supply cylinder 34 is attached to the base 30 of the air supply cylinder 34, and the nozzle 34 of this air supply cylinder 34 is
Since air is sent to the air receivers 35, 35a through the air receivers 35, 35a to operate the hydraulic auto clamps 20, . The problem of obstructing the rotational movement of the rotational disc 6 can be solved. Further, since the hydraulic device is provided on the side of the rotary plate 6, the overall shape is small and handling becomes convenient. Furthermore, the nozzle 34a of the air supply cylinder 34
By moving up and down, both air receivers 3
Since it is also possible to connect to 5, 35a,
In this case, only one air supply cylinder 34 is required, and costs can be reduced.

Although the present invention has been described as being applied to a two-color mold mechanism, the present invention is not limited thereto, and can also be applied to, for example, a press mold.

As explained above, according to the mold fixing device for a movable mold mechanism according to the present invention, the movable platen or the bolster is provided with a hydraulic device including a hydraulic pump and a valve, and a hydraulic device connected to the hydraulic pump to supply air from the air supply device. Since a joint is provided to connect the flow path, the hydraulic hose does not extend directly to the hydraulic auto clamp from the outside, and this prevents damage to the hydraulic hose due to twisting of the hydraulic hose. It becomes possible to simplify the structure.

[Brief explanation of drawings]

1 and 2 are a side view and a sectional view showing an example of a conventional mold fixing device for a movable mold mechanism, and FIGS. 3 and 4 are an embodiment of a mold fixing device for a movable mold mechanism according to the present invention. It is a side view and a perspective view which show an example. 4... Movable body, 5... Rotating shaft, 6... Rotating plate (movable plate), 10, 11... Bolster, 12, 13... Mold, 20... Hydraulic auto clamp, 27... Air supply device, 29... Air hose ( air flow path), 3
0...Base of movable body, 35...Air receiver (joint part), 38...Hydraulic pump, 41...Non-leak valve.

Claims (1)

[Claims] 1. A hydraulic auto clamp that is operated by hydraulic pressure output by sending air from an air supply device to a hydraulic device via an air flow path to a bolster fixed to a movable movable platen. In a mold fixing device for a movable mold mechanism to which a mold is attached, a hydraulic device consisting of a hydraulic pump and a valve is connected to the movable platen or the bolster, and an air flow path connected to the hydraulic pump and from the air supply device is connected to the movable platen or bolster. A mold fixing device for a movable mold mechanism, characterized in that it is provided with a joint part. 2. The movable platen comprises a rotary plate held by a rotary shaft rotatably inserted into the base of the movable body, and the joint portion is provided between the rotary plate or the bolster and the base portion. A mold fixing device for a movable mold mechanism according to claim 1, wherein the mold fixing device is provided. 3. The mold fixing device for a movable mold mechanism according to claim 1, wherein the valve is a non-leak valve.