JP2686710B2 - Disk mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk mold used for molding a disk for recording information by injection molding.

[0002]

2. Description of the Related Art A disk molding die in which a stamper outer peripheral presser ring can be moved from the outer periphery of a fixed-side mirror surface plate to a movable side and removed by utilizing die opening is disclosed in JP-A-63-130.
No. 320, JP-A-63-227315, and JP-A-2-295711 are known.

In these prior arts, a ring in which a plurality of elongated holes whose engaging ends are alternately different from each other are bored outside the outer peripheral pressing ring of the stamper is fitted to the outer peripheral pressing ring to be rotatable. Provided for each different elongated hole, the engaging and disengaging members by the piston rod are alternately put in and out from the fixed mold side and the movable mold side so that the outer peripheral pressing ring can be restrained to either one of the molds, and the ring can be replaced when the stamper is replaced. The rotation of the ring engages with the engaging end of the piston rod elongated hole on the movable die side to move the outer peripheral pressing ring together with the ring to the movable die side.

[0004]

In such a conventional technique, it is necessary to provide the outer peripheral pressing ring in combination with the outer ring for engaging and disengaging the ring in the mold, and to disengage the outer peripheral pressing ring, the piston rod is provided. Since it is adopted, it also requires a cylinder to move it back and forth, and since the handle for rotation is directly attached to the ring for disengagement, the handle is located at the fitting part of the fixed mold and the movable mold. Therefore, since the handle guide must be provided over both the fixed mold and the movable mold, the structure of the mold becomes extremely complicated, and the drive source for the piston rod is also required. Is more expensive than a normal disc molding die.

The present invention was conceived in order to solve the above-mentioned conventional problems, and an object thereof is to eliminate the need for a conventional rotating ring by rotatably fitting an outer peripheral pressing ring. Another object of the present invention is to provide a disc molding die having a new structure that can be easily engaged with and disengaged from the movable die side by a connecting pin provided on the outer peripheral pressing ring without using the piston rod.

[0006]

According to the features of the present invention according to the above object, a plurality of connecting pins are provided on a ring surface of an outer peripheral pressing ring at predetermined intervals and engaging step portions are provided at a plurality of positions on the outer edge of the ring. Provided with a detachable part in which the notch and the cutout are connected,
An engaging piece located at the attachment / detachment portion is provided on the outer periphery of the outer peripheral pressing ring on the outer periphery of the main body of the fixed mold, and the outer peripheral retaining ring is rotatably fitted between the outer periphery of the main body and the fixed-side mirror surface plate to form the outer periphery. The pressing ring is fixed to the outer edge of the fixed-side mirror surface disk by the engaging step portion and the engaging piece, while one end is provided at a portion corresponding to the connecting pin of the outer peripheral pressing ring at an engaging end facing the engaging step portion. A connecting ring having a formed elongated hole in the circumferential direction is fitted and fixed to the outer periphery of the movable side mirror surface plate, and the connecting pin is detachably housed in the elongated hole in a mold closed state. .

[0007]

[Operation] In the above configuration, when the outer peripheral pressing ring is moved counterclockwise in the mold closed state, the engaging step portion of the outer peripheral pressing ring is displaced and the engaging piece is located in the notch. Therefore, there is no one that restrains the outer peripheral pressing ring to the fixed mold side. Also, since the connecting pin moves counterclockwise together with the outer peripheral pressing ring, the head of the connecting pin, which had been housed in the long hole, moves toward the engaging end side and fits in, and the outer peripheral pressing ring passes through the connecting pin. It becomes restricted by the connecting ring. When the mold is opened in such a state, the outer peripheral pressing ring is pulled out from the fixed-side mirror surface disk by the mold opening force to move to the outer periphery of the movable-side mirror surface disk, and the stamper can be replaced.

When the mold is closed after the stamper is replaced, the outer peripheral pressing ring is fitted in the original position by the mold closing force. Further, when the outer peripheral pressing ring is returned by rotating in the opposite direction to the above, the connecting pin also moves and disengages from the engaging end. Further, the engaging step portion of the outer peripheral pressing ring also returns to the original position and sunk under the engaging piece. As a result, the outer peripheral pressing ring is released from the connecting ring, and is restrained to the fixed mold side by the engagement of the engaging step portion and the engaging piece, and presses the outer periphery of the stamper.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the figure, 1 is a fixed mold, 2 is a movable mold, and mirror surfaces 3 and 4 are embedded in the facing surfaces of these molds. An inner peripheral pressing member 6 of the stamper 5 is provided in the central portion of the fixed-side mirror surface plate 3, and an outer peripheral pressing ring 7 of the stamper 5 is provided on the outer periphery, both of which make the stamper 5 a fixed-side mirror surface. It is held on the mirror surface of the board 3.

On the ring surface of the outer peripheral pressing ring 7,
As shown in FIG. 3, four connecting pins 8 are projected outward at intervals of 90 °, and an engaging step 9 and a notch 10 are provided on four sides of the outer edge of the outer peripheral pressing ring 7. An attaching / detaching part connected to and is provided.

Such an outer peripheral pressing ring 7 is rotatably fitted between the main body peripheral edge 1a of the fixed mold 1 and the fixed-side mirror surface plate, and the outer peripheral pressing ring is provided with the above-mentioned engagement on the outer peripheral peripheral surface of the main body. Engaging pieces 11 located at the joining portion 9 and the notch portion 10 are provided, and the outer peripheral pressing ring 7 is fixed to the outer edge of the fixed side mirror surface plate 3 by the engaging pieces 11 and the engaging step portion 9, The outer circumference of the stamper 5 is held down.

Reference numeral 12 denotes a connecting ring on the movable mold side, which is fitted between the main body peripheral edge 2a of the movable mold 2 and the movable side mirror surface plate 4. The connecting ring 12 has a slot 14 formed in the circumferential direction at a position corresponding to the connecting pin 8 of the outer peripheral pressing ring, the slot 14 having one end formed at an engaging end 13 facing the engaging step 9.
Reference numeral 15 is an escape hole for the set screw 16 of the engaging piece 11.

Reference numeral 17 denotes a handle of the outer peripheral pressing ring 7, which is attached to a movable piece 19 which is loosely fitted in a circumferential guide groove 18 provided in the main body of the fixed mold 1. The movable piece 19 and the outer peripheral pressing ring. 7 is connected by a shaft member 21 which penetrates through the elongated guide hole 20 in the front portion of the guide groove and is inserted into the hole formed in the outer peripheral pressing ring 7 so that the tip end thereof can be freely inserted and removed.

In the above structure, the outer peripheral pressing ring 7 can be rotated left and right within the range of 15 ° by the handle 17. FIG. 3 shows a state in which the engagement piece 11 is located on the engagement step portion 9 and the outer peripheral pressing ring 7 is fixed to the outer periphery of the fixed-side mirror surface plate 3. In this fixed state, the handle 1
When 7 is moved counterclockwise with respect to the figure, the outer peripheral pressing ring 7 is also rotated in the same direction, the engaging step 9 is displaced to the left, and the engaging piece 1
1 is located in the notch 10. Therefore, the outer peripheral presser ring 7
There is nothing to restrain the fixed mold side.

When this rotation is performed in the mold closed state, the connecting pin 8 moves in the counterclockwise direction together with the outer peripheral pressing ring 7, so that the head of the connecting pin 8 accommodated in the elongated hole 14 is engaged with the engaging end. The outer peripheral pressing ring 7 is restrained by the connecting ring 12 via the connecting pin 8 by moving to the 13 side and fitting. Therefore, when the outer peripheral pressing ring 7 is rotated counterclockwise by the handle 17 before mold opening and then the mold is opened, the outer peripheral pressing ring 7 is fixed by the mold opening force as shown in FIG.
Then, the stamper 5 is detached and moved to the side of the movable mirror surface plate so that the stamper 5 can be replaced.

If the mold is closed after the stamper 5 is replaced,
Due to the mold closing force, the outer peripheral pressing ring 7 is fitted in the original position. Further, when the handle 17 is rotated in the clockwise direction and returned in the opposite manner to the above, the connecting pin 8 is moved by the rotation of the outer peripheral pressing ring 7 and disengages from the engaging end 13 and is positioned in the elongated hole 14. Further, the engagement stepped portion 9 of the outer peripheral pressing ring 7 also returns to the original position and goes under the engaging piece 11. As a result, the outer peripheral pressing ring 7 is released from the connecting ring 12 and is restrained to the fixed mold side by the engagement of the engaging step portion 9 and the engaging piece 11, and is also moved to the movable mold side even after the mold opening. The outer periphery of the stamper 5 is held down without shifting.

Reference numeral 22 is a rotation stopper for the outer peripheral pressing ring 7 charged in the main body of the fixed mold 1, and 23 is a rotation stopper for the outer peripheral pressing ring 7 charged in the main body of the movable mold 2, which are ball plungers. And also serves to position the outer peripheral pressing ring 7.

[0018]

As described above, the present invention provides the attaching / detaching portion and the connecting pin on the outer peripheral pressing ring of the stamper, and
A long hole that engages with the connecting pin is provided on the outer periphery of the movable side mirror surface plate, and the outer peripheral pressing ring is rotatably fitted into the outer periphery of the fixed side mirror surface plate, and the outer peripheral pressing ring is rotated only by rotating the outer peripheral pressing ring. Since it is possible to engage and disengage, it is not necessary to provide a clamp ring on the outside of the outer peripheral pressing ring as in the conventional case, and the piston rod and its accessory device are not required for engagement and disengagement. Although the outer peripheral pressing ring is automatically engaged and disengaged, the structure is simplified and the die cost is reduced.

[Brief description of the drawings]

FIG. 1A shows a disk molding die according to the present invention.
FIG. 6 is a vertical sectional view taken along line A when the mold is closed.

FIG. 2 is a vertical sectional view taken along line BB when the mold is closed.

FIG. 3 is a front view of a fixed mold side.

FIG. 4 is a front view of a movable mold side.

FIG. 5 is a vertical cross-sectional view when the mold is opened.

[Explanation of symbols]

 1 Fixed mold 2 Movable mold 3 Fixed-side mirror surface plate 4 Movable-side mirror surface plate 5 Stamper 6 Inner circumference pressing ring 7 Outer circumference pressing ring 8 Connecting pin 9 Engaging step portion 10 Notch portion 11 Engaging piece 12 Connecting ring 13 Engaging End 14 Long hole 17 Handle 18 Guide groove 19 Moving piece 20 Guide long hole 21 Shaft member

Claims (1)

(57) [Claims] 1. A mirror surface plate is provided by embedding on the facing surfaces of the fixed mold side and the movable mold side, respectively, an inner peripheral pressing member of the stamper is provided at the center of the fixed side mirror surface plate, and an outer peripheral pressing of the stamper is provided on the outer periphery. In a disk molding die in which a ring is provided, and the stamper is held on the mirror surface of the fixed-side mirror surface disk by these members and the ring, a plurality of connecting pins are projected on the ring surface of the outer peripheral pressing ring at required intervals. A mounting / dismounting portion in which the engaging step portion and the notch portion are connected is provided at a plurality of positions on the outer edge of the ring, and an engaging piece located at the mounting / dismounting portion is provided on the peripheral edge of the main body of the fixed mold outside the outer peripheral pressing ring. An outer peripheral presser ring is rotatably fitted between the fixed side mirror surface plate and the fixed side mirror surface plate, and the outer peripheral presser ring is fixed to the outer edge of the fixed side mirror surface plate by the engaging step portion and the engaging piece, while the outer periphery is fixed. At the location corresponding to the connecting pin of the presser ring A coupling ring having an elongated hole formed in the engagement end opposite to the engagement step portion in the circumferential direction is fitted and fixed to the outer periphery of the movable side mirror surface plate, and the coupling pin is attached in the mold closed state. A disk molding die, which is detachably housed in a long hole.