JPH0128915Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ejection device for ejecting a molded product from a mold hole of a mold.

Conventionally, there has been an ejecting device of this kind that has an ejecting jig attached to one end of a substrate that is moved forward and backward from the mold by a drive mechanism, and when the device moves forward, the ejecting jig enters the hole of the mold. When the molded product is an annular body such as an oil seal, the molded product is pushed out from the mold hole. The inner diameter of the mold hole and the outer diameter of the ejecting jig must be close to each other, and the mold hole and ejecting jig must be aligned accurately. It took a lot of time for positioning, etc.

The present invention has been developed in view of the above points, and has been designed so that even if there is some eccentricity between the ejecting jig and the mold hole when the ejecting device moves toward the mold, the ejecting work will not be hindered at all. A guide jig is provided which moves in the front and back direction relative to the ejection jig and is elastically biased in the forward direction, and the front end of the guide jig engages with the periphery of the mold hole to eject. A taper pin row that aligns the jig and the mold hole, and a locking step that abuts against the periphery of the mold hole are formed, and the molded product is ejected after undergoing an aligning operation guided by this guide jig. It is configured as follows.

An embodiment of the present invention will be described below with reference to the drawings.

The ejecting device, generally indicated by 1, is driven by a drive mechanism such as an actuator through a drive shaft 2 into the mold 3.
It is configured to reciprocate towards the An ejection jig mounting board 5 is fixed to the drive shaft 2 via a plurality of intervening members 4, and one
A book or a plurality of ejection jig attachment shafts 6 are attached, and an ejection jig 8 is attached to the tip of the attachment shaft 6 via a buffer mechanism 7. The outer diameter of the ejection jig 8 is slightly smaller than the inner diameter of the mold hole 9 of the mold 3, and the frontmost end of the annular protrusion 10 integrally formed on the front end of the jig 8 is inside the mold hole 9. Molded product 1
1 and presses it.

12 is a guide jig that protrudes an annular step formed on the inner peripheral surface and engages with the outer peripheral edge of the rear end of the jig 8;
It has an outer diameter slightly larger than the inner diameter of the mold hole 9, and a taper pin row 13 and a locking step 14 are formed on the outer periphery of the front end, and the diameter gradually decreases toward the tip. The guide jig 12 is movable in the front and back direction relative to the ejecting jig 8, and the retaining ring 1
an end member 16 fixed to the mounting shaft 6 by 5;
The guide jig 12 is always elastically biased in the forward direction by a spring means 17 such as a coil spring interposed between the rear end surfaces of the guide jig 12. 18 is a guide shaft for the ejection jig mounting board 5. Also, mold support member 1
The mold 3 supported by the ejecting device 1
It is configured to be able to move freely in a direction perpendicular to the direction of movement (vertical direction in the figure).

When ejecting the molded product 11 from the mold 3 with the ejecting device 1 having the above configuration, the ejecting device 1
When the guide jig 12 is moved in the direction of the mold 3 by the drive mechanism, the taper pin row 13 at the front end of the guide jig 12 first enters the mold hole 9, and then the locking step portion 14 collides with the periphery of the mold hole 9. If there is an eccentricity between the ejection jig 8 and the mold hole 9, the mold hole 9 of this taper pin row 13
The mold 3 is guided by the taper pin row 13 and moves to be aligned between the time when the locking step 14 and the peripheral edge of the mold hole 9 come into contact with each other.
The device 1 moves further forward, and the annular protrusion 10 of the ejection jig 8, which has been aligned with the mold hole 9, comes into contact with the molded product 11 in the mold hole 9, pushes it, and ejects it out of the mold. At this time, the guide jig 12
It remains in contact with the peripheral edge, and the spring means 17 at the rear of the guide jig 12 is contracted (second
(see figure).

In this way, by the time the ejecting device 1 moves forward and the ejecting jig 8 enters the mold hole 9,
The alignment of the ejecting jig 8 and the mold hole 9 is reliably completed, and the ejecting work can be performed quickly and smoothly. Note that in the above embodiment, the ejection jig 8
Alignment is performed by directly combining the guide jig 12 with the guide jig 12, but the guide jig 12 may also be combined with the ejection jig mounting shaft 6.

As explained above, the present invention includes a guide jig to correct the eccentricity between the mold hole of the mold and the ejection jig that extrudes the molded product in the mold hole, and the guide jig is connected to the ejection jig. The guide jig is configured to be movable back and forth relative to the guide jig, and is elastically biased forward, and furthermore, a taper pin row and a locking step are formed at the front end of the guide jig, and a locking step corresponding to the taper pin row is formed at the front end of the guide jig. All slight eccentricities can be automatically adjusted. At the same time, extremely slight eccentricity prevents the ejection jig from coming into contact with the outside of the molded product, preventing damage and deformation of the molded product. A device suitable for ejecting an annular molded product in which the portion pressed by the jig is limited to a narrow range can be provided with a compact configuration.

[Brief explanation of the drawing]

The drawings show an embodiment of the ejecting device of the present invention, and FIGS. 1 and 2 are half-cut sectional views showing the ejecting device before operation and during operation, respectively. DESCRIPTION OF SYMBOLS 1... Ejection device, 2... Drive shaft, 3... Molding die, 5... Mounting board, 6... Mounting shaft, 8... Ejection jig, 9... Mold hole, 11... Molded product, 12 …
...Guide jig, 13... Tape pin row, 14...
...Locking step portion, 17... Spring means, 19... Mold support member.

Claims (1)

[Claims for Utility Model Registration] An oil seal or the like which has an annular shape, is fitted and held in the inner periphery of the mold hole 9 of the mold 3, and the portion pressed by the ejection jig 8 described later is limited to a narrow range. A device for ejecting a molded product 11 from the mold 3, comprising an annular protrusion 10 whose outer diameter is set slightly smaller than the inner diameter of the mold hole 9, and connected to a driving means to eject the molded product 11 from the mold 3. an ejecting jig 8 that can move forward and backward in the direction of the ejecting jig 8; an annular guide jig 12 that is movable in forward and backward directions relative to the guide jig 12 and elastically biased in the forward direction;
a taper pin row 13 that engages with the peripheral edge of the ejection jig 8 and the mold hole 9 to align the ejection jig 8 and the mold hole 9;
A molded product ejecting device characterized by forming a locking step portion 14 that abuts the peripheral edge of the molded product.