JPS5913065Y2 - Record ejection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for peeling and taking out a record from a mold of an injection molding machine.

In conventional record injection molding, as shown in Fig. 1, a record record 1 is first molded, and after a certain period of time, a movable plate 2 is moved to open the mold, and a fixed plate 3 and a movable plate 2 are molded.
After confirming which of the record molding molds 8 the record disc 1 is placed on using the phototube 4 attached to the holder, the elevating cylinder 5 is activated, and the elevating cylinder 5 descends to the record take-out position, and then moves horizontally. The record disc 1 is moved horizontally by the cylinder 6 to approach the record disc surface, and the record disc 1 is absorbed by the record disc 7 by the suction cup 7 attached to the lower end of the lifting cylinder 5, and then peeled off from the disc molding mold 8. Then, by releasing the suction, the record is allowed to fall naturally and is taken out.

The above-mentioned conventional process has the disadvantage that it is not possible to reliably remove the vinyl record in one ejection operation.

This invention was developed to eliminate the above drawbacks,
An example of this will be explained using FIG. 2.

FIG. 2 is an enlarged sectional view showing the movable disc 2 together with the record disc 1. A sprue button 9 is provided in the center of the movable disc 2, which projects to push up the record disc 1, and the sprue button 9 is arranged coaxially with this. actuator 1
It is activated by 0.

Note that the same parts as in FIG. 1 are given the same reference numerals.

Reference numeral 11 denotes a groove for attaching a record, the opening of which is narrower than the bottom.

Therefore, after the material that is in a molten state during injection molding flows into the record recording groove 11 and is cooled and solidified, the material enters the groove 11.
It makes it even harder to leave and keeps the records.

To take out a record after injection molding, the actuator 10 operated by air pressure or hydraulic pressure may be used to displace the sprue bushing 9 and push the label part of the record record 1. In this way, the label part of the record part 1 can be removed by the pressure of the label part. As the bond between the material in the record adhesion groove and the record is released, the contact with the pressing surface of the sprue bushing 9 is also released, and the record falls freely and can be easily taken out.

In the above example, a groove for attaching a record record is shown in which the opening is narrower than the bottom surface, but in order to hold the record on the movable mold side, a plurality of silent grooves are provided in the movable mold near the label part. Needless to say, the holding force may be increased, and in the case of a record having a sound groove on one side, if the sound groove is provided on the movable mold side, the holding force due to the holding adhesive groove may be reduced.

As explained above, in this invention, a groove is provided near the label part of the record disc, the record disc is attached to the mold on the side where the groove is provided, the mold is opened, and the label part is pressed with a sprue button to take out the record disc. This allows the record to be peeled off without any strong force being applied to the sound groove due to the pressure of the sprue bushing, thereby causing no molding distortion.

[Brief explanation of the drawing]

FIG. 1 is a side view of an injection molding machine having a conventional take-out device. FIG. 2 is a sectional view of a movable platen showing an embodiment of the present invention. 1 is a record disc, 2 is a movable disc, 3 is a fixed disc, 4 is a phototube, 5 is an elevating cylinder, 6 is a horizontally movable cylinder, 7 is a suction cup, 8 is a mold for molding a music disc, 9 is a sprue bush, 10
1 is an actuator, and 11 is a groove for attaching a tone plate.

Claims (1)

[Scope of utility model registration request] A sprue bushing installed in a movable platen of an injection molding machine that does not have an injection cylinder, presses the label part of the record by moving the sprue after opening the mold after injection molding, and peels the record from the molding mold. In the disc take-out device, a groove is provided near the label portion of the movable disc to hold the molded record on the movable disc, and the groove holds the record disc on the movable disc by movement of the sprue. A record ejection device characterized by peeling from a mold.