JPS58177326A - Apparatus for molding disklike recording medium - Google Patents

Abstract

PURPOSE:To provide a novel apparatus for molding a disklike recording medium wherein a residual resin that will remain at the disk recording medium central section when it is molded is held by a central hole molding center member, the molded recording medium is taken out by an arm and at the same time the residual resin is transferred from the center member to holding means thereby both the residual resin and the molded recording medium are removed from the mold simultaneously by a single arm. CONSTITUTION:After a resin material is injected between molds 1, 2 from a nozzle 9, the molds 1, 2 are closed and pressed to mold the disk recording medium 10, and when the upper mold 1 is lifted, the disk 10 remains on the lower mold 2 and the residual resin 4a remains on the center member 6. The arm 12 having disk sucking disks 13 and the residual resin holder 14, 15 is introduced from the side of the molds, and is lowered toward the lower mold 2, the sucking disks 13 suck up the disk 10 and at the same time the holder 14, 15 pinch the residual resin 4a while the residual resin 4a is pushed up by a pin 7 thereby taking the residual resin and the disk simultaneously out of the molds.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding device for disc-shaped recording media (hereinafter referred to as discs) such as audio records and video discs. The structure is such that the resin and the disk can be taken out at the same time.

The unnecessary residual resin that remains in the center hole of the disk during disk molding is partially cured, so it is necessary to remove this unnecessary residual resin before the next disk molding.
It is essential. Naturally, it is also necessary to take out the molded disc without touching the recording surface of the disc.

In conventional molding equipment, the following configuration is used to remove the disk and unnecessary residual resin.

(B) After removing the disk from the mold surface, there is a method in which the remaining resin in the center metal fitting is injected or extruded by the amount of the eroded resin, and then the elongated resin is picked up by the ejecting arm.Also, it is possible to eject a small amount of material in an accurate amount. becomes very unstable, and there is a problem that the amount of disk material injected and extruded each time varies.

(b) There is also a method of taking out the disk as the same product with residual unnecessary resin attached to the center and making the center hole of the disk by other means such as punching outside the molding machine, but this is not suitable for high-quality, high-precision disks. This results in complicated and expensive equipment.

(c) There is also a method of taking out each disc using a dedicated disk take-out arm and a center hole residual resin take-out arm, but this is complicated and requires the uneasy approach of a device that is flush with the mold, as is the case with video disks. Furthermore, the disks, which require high-quality, high-precision molding, are also not dust-proof.

In consideration of the above problems, one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a molding apparatus including a disk ejecting device of the present invention, in which 24 is a lower fixed plate, 17 is a partial fixed plate, and both are connected by diepers 23 and 23'. The movable platen 18, which is slidably inserted into the lower fixed platen 23 and 23', is connected to the lower fixed platen 24 and the upper fixed platen 17 by an opposing mold clamping mechanism consisting of a ram 19 and a cylinder 20 in the lower fixed platen 24. It seems to move up and down between the two. The upper mold 2 for disk molding is a movable platen 18
The upper mold 1 for disk molding is fixed to the upper fixed plate 17.
is fixed. These molds 1 and 2 have a heating and cooling function, and are driven by a driving means consisting of a mold clamping mechanism and a hydraulic control circuit (not shown), as shown in FIG. The disc material supply position in Fig. 3A and Fig. 3B are shown in Fig. 3B.
The molds are controlled to three positions, including the mold clamping position where both molds are pressed together. Naturally, at the time of FIG. 3B, the disk ejecting arm 12 is turned and driven by the vertical drive mechanism 26.
External V between j (located. Flow presser mechanism 21゜2
1'&, l) - Mounted on the movable platen at the outer periphery of the mold 2 and supplies air, etc. to this machine - '21. stamper 3'
The device moves to the position where it presses the outer periphery of and the O device located above the ridge in Figure 3 F. The cylinder 18 is embedded inside the movable platen 18, is slidably provided in the center of the lower mold center metal fitting 6, and vertically slides on the bin 7 having an engaging protrusion 7a at its tip. Both center metal fittings 6, 6 have stampers 3, 3' fixed to the surfaces of both molds, and masaya 25, 2 are attached from the back of the mold.
5' respectively fixed.

FIG. 2 is an enlarged sectional view of the distal end of the disc ejecting arm 12 used in the present invention. Numeral 13 is a suction cup for discs, 14 is a fixed holder, and 15 is a movable holder, which is connected to a holder sliding cylinder 16 and has a structure that supplies air etc. to this cylinder 16 and slides it back and forth. The surface that is pressed and pressed is machined with minute irregularities to prevent it from slipping. A vacuum source is connected to the disk suction cup 13, which also has the function of attracting and separating the disk.

The disk ejecting arm 12 is rotated by a control signal and a power source from another unit (not shown) by a drive unit 26 (not shown).
- By moving downward and rotating, it is possible to take the position located between the two molds 1 and 2 as shown in Fig. 3C and the device that looks outside between the two molds, and the L downward drive. It is controlled to the upper and lower two positions of the C position in FIG. 3 and the third drawing position.

Next, the operation will be explained with reference to FIG.

FIG. 3A shows the injection state of the molded resin, in which the molded resin 4 is injected from the injection nozzle 9 of the molding material supply device 22 provided on the surface plate 17 through the upper center fitting 5. A predetermined amount is injected between both molds 1 and 2.

In this state, the tip of the pin 7 is aligned with the tip of the cylindrical convex portion 6a provided at the center of the lower center fitting 6.

At No. 31ΔB, the upper mold 1 and the upper mold 2 are removed from the state shown in FIG.
This indicates the mold clamping position where the molds are pressed together, and both molds equipped with heating and cooling functions change from the heating state to the cooling state, and the molding resin 4
is cured and the disk 10 is formed, and at the same time, the disk center hole is also formed by the engagement of the convex portion 6a at the tip of the lower mold center metal fitting 6 with the recessed portion 5a of the upper center metal fitting 5.

At this time, a semi-cured high-quality video disc, etc., has resin remaining in the upper hole in the convex part between the two center metal fittings and in the deep part of the thin part. At this time, the disk 1o, in which the material 4 is mold-clamped and cooled and hardened, releases a flow to the outer periphery, and is held by being wedged into the tip of the flow holding mechanism 21.

Figure 3C shows the disk ejecting position when the L mold 1 and the lower mold 2 are opened by the mold opening mechanism, and at this time, the flow outer periphery of the disk 10 is at the tip of the flow holding mechanism 21. The disk 10 is forcibly pressed and held and remains on the lower mold 2 side. Father, at this time, the engagement protrusion 7 at the tip of the bottle 7
a and the remaining semi-hardened resin 4a in the center hole is engaged with the upper mold center mold [material 1 at the conical apex of the lower concave part 5a of L5]
The lower mold center metal rod 6 is cut off from the deepest part of the supply hole.
It remains on the convex part of.

Then, the disk take-out arm 12 is driven by the drive unit 26 from outside the mold to a position above the center of the disk between the two molds. The suction/b1 disc ejecting arm 12 is lowered by the rotating L lower moving part 26 at a position where the disc suction cup 13 contacts the middle part of the disc 10 near the center hole other than the recording surface. Connect a vacuum source to the suction port 27 connected to the suction cup 13, and
It shows the state of adsorption. At this time, at the same time, the remaining resin 4a in the center hole, which is on the convex part 6a of the F mold center metal fitting 6 and held by the pin 7, is pushed up with the cylinder 8 by pushing up the pin 7. The tip of the residual resin 4a in the center hole is pushed up between the fixed holder 14 and the movable holder 16 at the center of the disk ejecting arm 12, and then the movable holder 16 is moved as shown in FIG. 3E. As the pin 7-L moves forward, the resin 4a remaining at the center and hole of the pin 7-L is pushed by the tip of the movable holder 15 and moves toward the fixed holder 14,
Insert between the ends of both holders 14 and 15 and unscrew.

At this time, the resin 42 remaining in the center hole moves laterally on the pin 7-1-, and the pin 7-7's engagement protrusion 7a disengages the remaining resin 42. FIG. 3E shows the lowest position V (original -) of FIG. In this state, the disk ejecting arm 12 attracts the disk 1o, pinches the center/hole residual resin 4a, and holds both of them at the same time. Next, the disk ejecting arm 12 is pushed up by the rotating upper toe drive unit 26 to the upper position between the molds similar to that shown in FIG. 3C, and becomes the position F in FIG. 3. At the same time, the flow holding mechanism 21. ．．
The tip of the disk 21' moves while biting into the flow around the outer circumference of the disk 10, lifting the disk 10 and peeling it off. Next, at the second culm, the disk ejecting arm 12 pivots to the outside of the mold, returns to the starting position, and continues the series of operations. From [-
As shown in the above, the nozzle 9 is 1 m from the upper part of the L mold center metal fitting 5 and the material is supplied to the molding device. A similar effect can be obtained by inserting and molding using another method.

As described above, according to the present invention, it is possible to simultaneously take out both the disk and the resin remaining in the center and hole portions out of the mold with a single ejector mechanism, which simplifies the equipment and improves the press cycle. It can also be shortened.

- When molding the disc and the center hole at the same time for a video disc etc. with a relatively large center hole diameter, it is still necessary to
(There is also a lot of residual resin in the cured resin, and it is necessary to ensure that this residual resin is removed at the same time as the disc every time one disc is molded.)
It is particularly effective for pidiotisks with canine central convulsions.

Furthermore, compared to other methods of removing residual resin from the center hole of the disc, it does not touch the recording surface of the disc.
Since it is taken out at the same time as the disc, it is of good quality and dustproof.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a disk-shaped recording medium forming apparatus according to an embodiment of the present research, FIG. 2 is a partially cutaway side view of the same essential parts, and FIGS. 3A, B, C, D, E. 1 and 2 are cross-sectional views showing the operating state V4 of the first essential part. 1*e++111111. J-Mold, 2 @@II@I
I@lower mold, 31111+111@11 stand bar-14
mmm*...Disc material, 5...Spring...Mold center fitting, 6...Lower mold center fitting, 70...
Φ-Z type bottle, 8...I+07 Linder, 911.1
1Φ...nozzle, 10...e disk, 11...
... e Residual resin in center hole, 12 ... Disk ejection arm, 13 ... ■ Disc suction cup, 1411
110・e fixed holder, 150・0@movable holder,
1611...For holder/linda-117...
...Upper fixed plate, 180...■Movable plate, 19.Fist...
・・Ram, 2o・・Fist・O・Cylinder, 21・・・・
...Flow presser mechanism, 22...Material supply mechanism,
23...Tie bar, 24...Lower fixed plate, 25...Stop arrow, 26...Swivel vertical drive unit, 27...Suction mouth. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3! l Figure 3 Figure 3 Figure 354 (F) Continued from page 1 ■ Applicant Nissei Jushi Kogyo Co., Ltd. 10, 21 Nanjo, Sakaki-cho, Hanishina-gun, Nagano Prefecture

Claims (1)

[Claims] a mold clamping device; a center metal fitting for forming a center hole fixed to one of a pair of molds attached to the mold clamping device;
a first holding means for holding the disc-shaped recording medium molded between the pair of molds on the mold provided with the center-hole molding fitting; and a residue generated in the center of the disc-shaped recording medium during molding. a second holding means for holding the resin on the side of the center hole molding center metal fitting; movable between a first position between the pair of molds and a second position outside the pair of molds; and a take-out arm movable in a direction toward and away from the disc-shaped recording medium on the mold at the first position;
The take-out arm includes third holding means for suctioning and holding the disc-shaped recording medium, and fourth holding means for holding the residual resin away from the second holding means.