JPH0252607B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a take-out device for taking out a thin rubber molded product attached to a core after opening the mold.

Conventionally, in order to remove a thin rubber molded product (transfer, injection molded product, etc.) with an undercut such as a dust boot from the core after opening the mold, the upper outer periphery of the thin rubber molded product is vacuum-sucked while the core and thin-walled molded product are removed. The thin rubber molded product is released from the core by blowing air between the rubber molded products to make them swell, and then the thin rubber molded product is held by vacuum suction and transported to another location, after which the vacuum suction is released. It was falling under its own weight.
However, in the case of this method, a vacuum suction means is required in addition to an air blowing means, and the entire device for taking out the thin rubber molded product becomes complicated and expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device for removing thin-walled rubber molded products that can eliminate the above-mentioned problems.

The device for removing thin-walled rubber molded products of the present invention has a device body formed of a cylindrical body with a downward opening, and an air blowing nozzle for releasing the thin-walled rubber molded product from the core in the ceiling of the device body. In addition to protruding toward the thin rubber molded product, it locks with the thin rubber molded product to hold the thin rubber molded product within the device body, and does not deform due to forced external force and prevent the thin rubber molded product from expanding and being removed when air is blown. The above object is achieved by providing a locking piece made of a rubber-like elastic body projecting from the inner circumferential wall of the instrument body.

Hereinafter, one embodiment of the present invention will be described based on illustrated examples.

1 and 2 are an overall layout and a front view of a thin rubber molded product take-out device to which the take-out device of the present invention is applied.

A rotary actuator 2 is disposed on a base 1 via a sub-plate 4 that moves up and down while being guided by guide rods 3, 3. The sub-plate 4 is connected to a piston rod 6 of an air cylinder 5 so as to be driven up and down. The rotary actuator 2 has an arm 8 coupled to its rotating shaft 7, and the arm 8 rotates to receive the ejector 14 attached to the tip of the rotary actuator 2 at the center position of the mold 9 (the mold release position). Chute (molded product removal position) 1
It is possible to transport between 1 and 1. A take-out device 14 is attached to the tip of the arm 8 via a hanging rod 13 having a push-out plate 18 at the tip. The hanging rod 13 is locked on the upper end surface of the arm 8 and is slidable. An air pipe 15 that also serves as a guide rod is arranged from the tip of the arm 8 toward the center of the ceiling of the extraction device 14, and a compression coil spring 16 is interposed in the air pipe 15 between the extraction device 14 and the arm 8. has been done. Further, a photoelectric switch 12 is disposed across the receiving chute 11 to check whether the molded product has fallen. A stopper plate 17 is formed extending from the sub-plate 4 to stop the movement.

As shown in FIGS. 3 to 6, the extraction device 14 has a device main body 21 formed of a cylindrical body with a downward opening, and an air blowing nozzle 2 at the center of the ceiling of the device main body 21.
2 is screwed in, and a locking piece 23 made of a rubber-like elastic body is attached to protrude from the inner circumferential wall of the instrument body 21. The inner diameter of the device main body 21 is approximately equivalent to the outer diameter when the dust boot M, which is a thin rubber molded product, is expanded by blowing air between it and the core 25. In addition, the flange portion 24 at the upper end of the air blowing nozzle 22 also serves as a spring seat.
The lower end is formed into a tapered wall portion so that when the dust boot M is pressed against the upper end wall of the dust boot M, air blown from the pressure contact portion does not escape to the outside. The inner periphery of the air blowing nozzle 22 can slide on the outer periphery of the air supply pipe 15, and the locking pieces 23 protrude radially from the inner peripheral wall, and the imaginary locking pieces 23 are formed by connecting their tips. The diameter of the ring is fixed to the dust boot M,
That is, it can be locked to the undercut or lower end of the boot M.

Next, how the above embodiment is used will be explained. After molding using the transfer method or the like and opening the mold, in order to release the dust boot M attached to the core 25, rotate the arm 8 clockwise by 90 degrees from the position shown in Figure 1 using the rotary actuator 2. After moving the ejecting device 14 so that its axis coincides with the center of the mold 9, that is, the axis of the core 25, the air cylinder 5 is operated to remove the dust from the tip of the air blowing nozzle 22. The arm 8 is lowered until it comes into pressure contact with the upper end wall of the boot M (FIG. 3). At this time, it is desirable that the inner periphery of the lower end of the air pipe 15 be formed in a reverse tapered shape corresponding to the taper of the upper end of the core 25, so that the centering of the extractor 14 and the core 25 can be easily performed.

Subsequently, high-pressure air is blown into the air pipe 15 from the air hole 26, and the high-pressure air is caused to enter between the core 25 and the dust boot M along the tapered part of the core 25, and the dust boot M is moved to the fourth position. As shown in the figure, the instrument body 21 is inflated until it contacts the inner circumferential wall, and at the same time, the air cylinder 5 is activated to raise the arm 8 and pull up the extraction instrument 14 via the hanging rod 13 (FIG. 5). Here, the locking piece 23 deforms when the dust boot M is expanded, but the locking piece 23 deforms when the dust boot M is expanded.
After being released from the core 25, it is restored and becomes a dust boot M.
The dust boot M is retained within the instrument main body 21 by being engaged with the undercut portion of the dust boot M.

Next, the rotary actuator 2 rotates the arm 8 by 90 degrees to the left and moves the extractor 14 holding the dust boot M to just above the chute 11.Then, the air cylinder 5 is actuated to move the arm 8. Lower it (Figure 6). At this time, the device main body 21 is stopped from descending at the upper end of the receiving chute 11, but the pushing plate 18 is stopped from moving upward by the stopper plate 17 at the upper end of the hanging rod 13, so that the pushing plate 18 is relatively dust booted. M is pushed out and dropped into the receiving chute 11. In this case as well, the locking piece 23 deforms toward the inner circumferential wall of the instrument body 21 and does not prevent the dust boot M from being pushed out. In this way, mold release and removal of the dust boot M is completed. Note that the dust boot may be removed by pulling it out by hand directly from within the instrument body without using the push-out plate.

The device for removing thin-walled rubber molded products of the present invention has the above-described configuration, so when used by attaching it to a conveying means, it eliminates the need for vacuum suction means and requires only air blowing means, which simplifies the overall molded product removal device. At the same time, equipment costs can be reduced, and maintenance can also be made easier.

[Brief explanation of drawings]

Fig. 1 is an overall layout diagram of a rubber molded product ejecting device using the ejecting device of the present invention, Fig. 2 is a partially omitted front view, and Figs. FIG. 4 is a cross-sectional view of a main part showing each stage of demolding and taking out. 2...Rotary actuator, 5...Air cylinder, 8...Arm, 9...Mold, 11...Receiving chute, 13...Hanging rod, 14...Ejecting device, 15...Air pipe, 18...Extrusion plate, 21...Device body , 22...
Air blowing nozzle, 23...locking piece, 25...core, M...dust boot (thin rubber molded product).

Claims (1)

[Claims] 1. A device for taking out a thin-walled rubber molded product attached to a core after opening the mold, the device body being formed of a cylindrical body with a downward opening, and a core on the ceiling of the device body. An air blowing nozzle that blows air between the molded product and the thin-walled rubber molded product to release the thin-walled rubber molded product from the core is provided protruding downward, and also locks with the thin-walled rubber molded product to release the thin-walled rubber molded product from the core. A locking piece made of a rubber-like elastic body that retains the molded product within the device body and does not deform due to forced external force and prevent the thin rubber molded product from expanding and being taken out when air is blown is provided protruding from the inner circumferential wall of the device body. A device for removing thin-walled rubber molded products.