JPS5922734A - Clamping device of movable mold mechanism - Google Patents

Abstract

PURPOSE:To eliminate the need for connection of oil pressure hose to hydraulic automatic clamping device by a method wherein an oil pressure device is provided to a shiftable bolster side and the oil pressure generated by the air sent to the oil pressure device is supplied to oil pressure automatic clamping devices. CONSTITUTION:An oil pressure supply source for the oil pressure automatic clamping devices 20 to clamp metal molds 12 and 13 to bolsters 10 and 11 is provided on the bolsters 10 and 11 or on a movable platen 6 to hold the bolsters 10 and 11. In other words, an oil pressure pump 38 is arranged at the basic part 30 of a movable body 4 and at the same time connected by means of piping with an air hose 29 led to air supply source. The oil pressure, into which the oil pressure pump 38 converts air pressure, is supplied to the oil pressure automatic clamping devices 20.

Description

[Detailed description of the invention] The present invention relates to a mold clamping device using a seat clamp.

In general, a two-color mold mechanism, as shown in FIG. A rotary plate 6 is held by a rotary shaft 5 rotatably provided on the movable body 4, a movable plate 7 moves a certain distance in the direction of the rotary plate 6 by the guide rod 3, and Injection devices 8 and 9 are located outside the movable plate 7, and mold clamping bolsters 10 are fixed to both sides of the rotary plate 60.

11, and a die rate 14 of the molds 12 and 13 held by the mold clamping bolsters io and ii.

15, a mold 16 held by the mold clamping bolster 1, and a mold 18 held by the mold clamping bolster 17 attached to the movable platen 7.

In such a configuration, first, the nozzle 9 of the injection device 9
The resin from a is created in the molding space formed between the molds 13 and 18 via the movable platen 7 to mold the first molded product [7
, then move the movable plate 7 backward and move the mold 18 to the mold 13.
After separating from the mold 13, the rotary shaft 5 is rotated to make the mold 13 face the mold 16 on the fixed platen 2, and the mold 13 and the mold 16 are separated from each other.
Resin is injected from the nozzle 8a of the injection device 8 into the molding space formed, and a second molded product is integrally molded on the first molded product. Thereafter, the two-color molded product made up of the first molded product and the second molded product is taken out after the molds 13 and 16 are separated. In addition, when molding the second molded product using the mold 13 and the mold 16, the mold 12 is opposed to the mold 18, and the mold obtained between the mold 12 and the mold 18 is A first molded product is molded in the molding space, and then the mold 12 is again opposed to the mold 16 by the rotary shaft 5, and a second molded product is formed between them. By repeating such molding processes, two-color molded products can be mass-produced.

Conventionally, a hydraulic auto clamp 20 as shown in FIG. 2 has been used to attach the mold die plates 14 and 15 to the mold clamping bolsters io and il. A T-shape 23 provided at the tip of an operating pin 22 protruding from the main body 21 of the hydraulic auto clamp 20 is housed in a T-groove 24 provided in the bolsters 10 and 11, and is connected to the main body 21 via a hydraulic hose 25. By supplying hydraulic pressure, the bin 22 moves in the direction of the main body 21, so the main body 21 and the T-type 23 move the mold die plays 1, 14, 15 to the bolsters 10, 11.
It can be automatically tightened in the direction. 25 hydraulic hoses, each clamp 20.20] to hydraulic system 2
[7 and 9] Air is supplied from the air supply device 27 to the hydraulic device 26, and this air pressure is converted into hydraulic pressure by the hydraulic device 26, and then is transferred to the hydraulic hoses 25 through the plurality of hydraulic hoses 25. ~ is supplied to each of the autoclamps 20 described above.

However, with such a configuration, the mold 12°13
Since the hydraulic hose 25 has a structure in which the hydraulic hose 25 is rotated around the rotating shaft 5, the hydraulic hose 25 is twisted, and the hydraulic hose 25 becomes gradually fatigued and damaged due to this repetition. Ta. However, if multiple hydraulic hoses are extended in the direction of the molds 12 and 13, they will get in the way when removing the molded product. In order to solve this problem, it is possible to remove each port 25 after operating the auto clamp 20, but such a method would make the work complicated and would require mass production. This is not a fool's errand, and it puts a heavy burden on the workers.

An object of the present invention is to eliminate the above-mentioned drawbacks by attaching a hydraulic system to a movable body such as a rotary plate that holds a mold, and will be described in detail below using examples.

3 and 4 are a side view and a perspective view showing an embodiment of a mold clamping device for a movable mold mechanism according to the present invention, and the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals. . In the figure, a plate-shaped base 3o that supports the rotating shaft 5 in the movable body 4
is provided with a solenoid valve 31 to which air from the air port 29 is supplied, and an air hose 3 from this solenoid valve 31 is provided.
It is supplied to a 2.33 degree air supply cylinder 34 and controls this air supply cylinder 34. The air supply cylinder 34 is directly supplied with air from the air hose 29, and this nozzle 34a supplies air to an air receiver 35 attached to the upper side of the bolster 11. That is, when the solenoid valve 31 is turned on, the nozzle 34a is seated and connected to the air receiver 35, and the air blown out from the nozzle 34a is then transferred to the air receiver 35a.
supplied to The air from the air receiver 35 is supplied to a tank 36 with a reverse valve provided on the upper side of the bolster 11.
The air from this tank 36 is sent via a pipe 37 to a hydraulic bonder 38 provided on the side wall of the rotary plate 6, where it is converted into hydraulic pressure by this hydraulic pump 38, and this hydraulic pressure is sent to a branch pipe 39. Non-leak pulp 4 through .40
1 and from this non-leak pulp 41 to the repeater 4
2 to the main body 23 of the clamp 20.

In this case, multiple clamps 20 are attached to the bolster 11.
is provided, and hydraulic pressure is supplied to each clamp 20 from a repeater 42 via a plurality of pipes 44. The bolster 10 is also provided with the air receiver 35a,
This air receiver 35a 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. In addition,
The repeater 42 and clamp 20 are similarly provided on the polster 10 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 clamp 20 is placed on the die plate 15, and in this state, the solenoid valve 31 is controlled to open the nozzle 34a of the air supply cylinder 34. down and remove that nozzle 3.
4a 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 36 via the tank 36. Air from the tank 36 is converted into hydraulic pressure by the hydraulic pump 38 and then supplied to the non-leak pulp 41.

When the switch 41a of the non-leak pulp 41 is operated to control the hydraulic pressure to be supplied to the relay 42 provided on the bolster 11, the hydraulic pressure is supplied to each clamp 20 of the bolster 11 via the relay 42. and clamp 2
0 can be activated. As a result, the bolster 1
1, the die plate 15 to which the mold 13 is fixed can be reliably fixed. Here, by controlling the solenoid valve 31, the nozzle 34 of the shear supply cylinder 34 is
Even if a is separated from the air receiver 35, the non-leak pulp 4
1, the oil pressure of the auto clamp 20 does not decrease, and the oil pressure is kept constant, so that the mold 13
There is no risk of the item falling off from the bolster 11.

Further, since the check valve on the tank 36 side also operates to ensure safety, the air in the tank 36 will not flow back. Next, rotate the rotating shaft 5 by 180 degrees, position the bolster 10 on the air supply cylinder 34 side, and
The nozzle 34 is connected to the air receiver 35a provided on the 10 side.
By seating the parts a in a corresponding manner and supplying air, hydraulic pressure can be supplied from the hydraulic pump 38 to the non-leak pulp 41 in the same manner as described above. Here switch 4
By operating 1b, a clamp 20 provided on the bolster 10 can be operated, and the clamps 1 and 14 of the mold 12 set in advance on the bolster 10 can be fixed by this clamp 20.

Therefore, according to the present invention, the hydraulic device consisting of the hydraulic pump 38 is incorporated into the movable platen 6 side, and the hydraulic hoard clamp 2
0.20, it is possible to solve the problem of the conventional hydraulic hose extending from the outside in the direction of each clamp, which obstructs the rotational movement of the rotary plate 6. can. Furthermore, since the hydraulic system is built into the rotary plate 6, the overall shape is small and handling is convenient. Moreover, as in this embodiment, the air supply cylinder 34 is provided on the movable body 4 side, and the air receivers provided on the respective bolsters 11 and 10 are connected to the nozzle 34a side of this air supply cylinder 34. Since only one air supply cylinder 34 is required, the cost of the apparatus can be reduced.

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

As explained above, according to the mold clamping device for a movable mold mechanism according to the present invention, a hydraulic pump and non-leak pulp are incorporated in the movable bolster side, and hydraulic pressure from the non-leak pulp is applied to the bolster. 1~ actuate the hydraulic auto clamp based on the hydraulic pressure from the hydraulic pump so as to supply the hydraulic auto clamp to the hydraulic auto clamp;
Since the mold is attached to the bolster using this hydraulic auto-clamp, the hydraulic hose does not extend directly from the column to the auto-clamp, thereby preventing damage to the hose due to twisting of the hydraulic hose. Moreover, the structure of the entire device can be simplified.

[Brief explanation of drawings]

1 and 2 are a side view and a sectional view showing an example of a conventional mold clamping device for a movable mold mechanism, and FIGS. 3 and 4 are one embodiment of a mold clamping device for a movable mold mechanism according to the present invention. It is a side view and a perspective view which show an example. 2... Fixed plate, 3... Guide rod, 7... Movable plate,
8゜9...Injection device, 10.11...Bolster-1
14゜15... die play), 12.13... mold, 31... solenoid valve, 34... air supply cylinder, 35... air receiver, 36... tank, 38...
・Hydraulic pump, 41...Non-leak pulp. Patent applicant: Hashimoto Formink Kogyo Co., Ltd. Agent, Patent attorney Jun Miyazono - Procedural corrector Date of August 17, 1982: Mr. Kazuo Wakasugi, Commissioner of the Patent Office2, Title of invention: Mold clamping device for movable mold mechanism 3 Relationship with the case of the person making the amendment Patent applicant 4, agent

Claims (3)

[Claims] (1) In a mold clamping device that attaches a mold to a movable bolster using a hydraulic auto-clamp, a hydraulic device consisting of a hydraulic pump and pulp is provided on the bolster side, and air is supplied to this hydraulic device from an air supply device. A mold clamping device for a movable mold mechanism, characterized in that the hydraulic pressure output by the hydraulic pressure is supplied to the hydraulic auto clamp. (2) A patent in which the polster is fixed to a rotary plate that is rotatably held by a base, and a joint portion is provided between the base and the rotary plate to connect the air flow path of the air supply device. A mold clamping device for a movable mold mechanism according to claim 1. (3) The movable mold mechanism according to claim 1, wherein the pulp is a non-leak pulp.