JPH08194973A - Method and apparatus for mounting/demounting stamper - Google Patents

Abstract

PURPOSE: To obtain an apparatus for mounting/demounting a stamper easily on/from a molding die without grasping the stamper directly with hand. CONSTITUTION: The stamper mounting/demounting apparatus 10 comprises means 40 for inserting a supporting member 12 into the central hole of a stamper to hold the stamper at a predetermined position through the supporting member 12, means 14 projecting from the cavity forming face of a molding die to align the stamper coaxially while superposing the forward end face of the supporting member 12 on a fitting protrusion to be positioned, and means 20 for shifting the stamper to the forward end side while being supported by the supporting member 12. The stamper is transferred to the side of the fitting protrusion superposed on the forward end face of the supporting member 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamper attaching / detaching device for attaching / detaching a stamper on which predetermined information is engraved, to a disc substrate forming die, and a method of attaching the stamper to the disc substrate forming die.

[0002]

2. Description of the Related Art A disk substrate for forming an optical disk used for audios, computers, etc. generally uses a forming mold composed of a pair of molds that are fitted together to form a molding cavity. After forming a circular plate-shaped stamper with predetermined information engraved on the forming surface and setting it, the predetermined cavity is filled with a predetermined resin material, so that the substrate on which the stamper information is transferred ( It is manufactured by molding a replica).

As a type of molding die for forming a disk substrate, in recent years, in order to easily and quickly attach / detach or replace the stamper, a stamper superposed on the cavity forming surface is formed into a cavity by negative pressure air. It is proposed that the surface is adsorbed and fixed. Further, in a mold having such a stamper fixing structure by air suction, generally, a fitting protrusion having a circular outer peripheral surface is formed in the center portion of the cavity forming surface on the side where the stamper is mounted, The stamper is positioned on the cavity forming surface by fitting the central hole of the stamper to the outer peripheral surface of the fitting protrusion.

By the way, positioning of the stamper in the molding cavity requires extremely high precision, and it is necessary to prevent the resin material from entering the gap between the fitting projection and the stamper. The projection is fitted with almost no gap.

However, in such a molding die,
Since there is almost no gap between the mating surface of the stamper and the mating protrusion, the mating protrusion does not fit well into the central hole of the stamper when the stamper is attached, and the stamper is caught on the outer peripheral edge of the mating protrusion. It is easy to get on top, and if the resin material is filled into the molding cavity by matching the molds under such a state, the stamper may be deformed or damaged due to the resin filling pressure. Since it has to be performed in a very narrow space between the opened molds, there has been a problem that the work is difficult, tedious and time consuming.

Further, since the mounting of the stamper requires a high working accuracy when it is fitted into the fitting protrusion, it is inevitable that the stamper is manually mounted, and the mounting work is extremely difficult between the opened molds. In addition to being difficult because it is performed in a narrow space, the information engraved surface of the stamper is liable to be touched by fingers and the information engraved surface is likely to be rough, which may cause defective products. It was

In addition, even when the stamper is removed from the molding die, since the stamper is adsorbed and fixed on the cavity forming surface with the information engraving surface facing outward, such a removing work is performed by a mold opened. In addition to being carried out in a very narrow space, the work is extremely difficult, troublesome and time consuming, and the information engraving surface is easily touched by a finger, and the information engraving surface is easily damaged. There was a problem.

[0008]

The present invention has been made in view of the above circumstances, and a problem to be solved by the present invention is that a stamper can be easily attached to and detached from a cavity forming surface. An object is to provide a detachable device.

Another object of the present invention is to provide a stamper mounting method capable of easily mounting the stamper on the cavity forming surface.

[0010]

In order to solve such a problem, the present invention is to be superposed on a cavity forming surface of a disk substrate molding die and fitted to an outer peripheral surface of a fitting projection provided on the cavity forming surface. The annular plate-shaped stamper that is positioned by
A stamper attachment / detachment device for attaching / detaching to / from such a cavity forming surface, wherein (a) a support member inserted into a central hole of the stamper to support the stamper, and (b) the stamper at an insertion support position of the support member. By holding the holding means for holding and (c) aligning the support member with the cavity forming surface, the tip end surface of the support member is coaxially overlapped with the protruding tip end surface of the fitting protrusion. Positioning means for connecting the outer peripheral surface of the support member to the outer peripheral surface of the fitting projection in the axial direction,
(D) Transfer means for moving the stamper held at the insertion support position of the support member to the tip end side of the support member and to the fitting protrusion side superposed on the protruding tip end surface of the support member. A stamper attaching / detaching device configured to include and is characterized.

In a preferred embodiment of the stamper attaching / detaching device according to the present invention, the stamper attaching / detaching device is provided so as to project outward from the tip end surface of the support member, and is provided in the resin introduction hole of the sprue bush in the disc substrate mold, the inside of the female cutter or the like. The positioning means is constituted by the positioning projections which, when inserted, position the supporting member with respect to the cavity forming surface.

In a preferred embodiment of the stamper attaching / detaching device according to the present invention, permanent magnets, electromagnets, negative pressure attraction or the like exerts an attractive force on the stamper to hold the stamper at a predetermined position on the support member. Depending on the mechanism
The holding means is configured.

When the holding means is constructed by using permanent magnets, a plurality of holes for arranging the permanent magnets should be provided, and the number of permanent magnets to be installed in these holes should be adjusted appropriately. Therefore, it is more preferable that the holding force exerted on the stamper can be adjusted.

Furthermore, in a preferred embodiment of the stamper attaching / detaching device according to the present invention, a magnet that exerts an attractive force on the stamper is arranged so as to be movable in the approaching / separating direction with respect to the stamper, or a negative force exerting an attractive force on the stamper. Turn on / off compressed air
The holding force exerted on the stamper by the holding means can be released by FF or the like.

Further, in a preferred embodiment of the stamper attaching / detaching device according to the present invention, the stamper is attached to the support member so as to be reciprocally movable in the transporting direction of the stamper, and the slide member pushes the stamper to move the stamper on the support member. A transfer means is configured.

The present invention also provides an annular plate-shaped stamper,
The stamper is superposed on the cavity forming surface of the disk substrate molding die, fitted and positioned on the outer peripheral surface of the fitting protrusion provided on the cavity forming surface, and fixed by suction to the cavity forming surface. When the mounting member is mounted on the cavity forming surface, after the supporting member is inserted through the central hole of the stamper to support it, the tip end surface of the supporting member protrudes from the cavity forming surface. After aligning the stamper to the fitting projection side by transferring the stamper from the support member side to the fitting projection side, the support member is attached to the fitting projection by suction. It is also characterized by a stamper mounting method that separates it from the.

Such a stamper mounting method can be particularly advantageously carried out by using the stamper attaching / detaching device having the structure according to the present invention as described above.

[0018]

In the stamper attaching / detaching device having the structure according to the present invention, the stamper is supported by the support member without touching the stamper with fingers, and the stamper supported by the support member is moved by the stamper transfer means. As a result, the stamper is fitted to the fitting protrusion by the guiding action of the support member and positioned on the cavity forming surface of the molding die.

Therefore, when such a stamper attaching / detaching device is used, after the stamper is supported by the supporting member in a large external space, the stamper is guided between the opened molds and the stamper is not directly touched with fingers. Can be fitted to the fitting protrusion to be held by suction at a predetermined position on the cavity forming surface. Moreover, since the stamper is guided by the support member and fitted into the fitting protrusion, the stamper is not attached to the fitting protrusion. It can be fitted advantageously and quickly.

Therefore, in such a stamper attaching / detaching device, the workability of attaching the stamper to the forming die can be dramatically improved, and the stamper can be attached to the forming die surely and quickly. This prevents damage to the stamper due to improper mounting of the stamper, defects such as defective molding, and effectively prevents dirt, damage, and roughening of the stamper due to contact of fingers with the stamper. To get.

Further, in such a stamper attaching / detaching device, since the holding force of the holding means is applied to the stamper supported by the supporting member, the stamper is prevented from falling off during the attaching / detaching work of the stamper, which is more excellent. Workability can be exhibited.

Further, according to the stamper mounting method according to the present invention, after the stamper is supported by the supporting member in a wide external space, the stamper is guided between the molds opened without touching the stamper with fingers. Since it can be fitted to the fitting protrusion and sucked and held at a predetermined position on the cavity forming surface, the stamper can be easily attached to the molding die and dirt of the stamper due to finger contact is also advantageous Can be prevented.

[0023]

EXAMPLES Examples of the present invention will now be described in detail with reference to the drawings in order to clarify the present invention more specifically.

First, FIGS. 1 and 2 show a stamper attaching / detaching device 10 as one embodiment of the present invention. The stamper attaching / detaching device 10 is provided with a support member 12 having a circular rod shape of a predetermined length, which is formed with an outer diameter slightly smaller than the central hole of the stamper to be attached / detached to / from a disc substrate molding die (not shown). Also, this support member 1
A positioning projection 14 having a circular outer peripheral surface projecting axially outward from the central portion is integrally formed on the tip end surface of 2, and the center of the projection tip surface of the positioning projection 14 is formed. A sharp conical positioning pin 15 is integrally provided so as to project outward from the portion in the axial direction. Furthermore, a piston portion 16 having a larger diameter than that of the support member 12 is integrally formed on the base end side of the support member 12, and
The support member 12 is opened at the axial end surface of the piston portion 16.
There is a recess 18 extending into the interior of the.

The support member 12 is attached to the housing 20 so as to be reciprocally movable in the axial direction. The housing 20 has a large-diameter disk-shaped portion 24 protruding from one end side in the axial direction of a gripping member 22 having a rod shape, and a flange-shaped portion 26 that is inwardly directed toward an opening peripheral portion.
A cylindrical cylinder member 28 having the above is superposed and fixed to form a hollow cylinder inside. The piston portion 16 of the support member 12 is accommodated in the cylinder so as to be slidable in the axial direction. In other words, the cylinder member 28 is arranged on the outer peripheral surface of the support member 12 so as to be capable of reciprocating in the axial direction.

A coil spring 32 is provided in the cylinder, and the recess 18 in the support member 12 is provided.
Is interposed between the bottom surface of the housing and the axial end surface of the housing 20. As a result, the support member 12 is urged in a direction projecting outward from the opening of the cylinder member 28, and in a state where no external force is applied, as shown in FIG. The member 12 is a cylinder member 28.
Is located at the protruding side moving end defined by the contact with the flange-shaped portion 26. Then, by applying a pressing force to the tip surface of the support member 12, the piston portion 16 is slid in the cylinder,
The support member 12 is pushed inward in the housing 20 in the axial direction, so that the flange-like portion 26 of the cylinder member 28 is slidably moved on the outer peripheral surface of the support member 12 toward the distal end side in the axial direction. It has become.

Further, a ring-shaped magnet holding member 34 is superposed and fixed to the axial end surface of the cylinder member 28. In this embodiment, a fixing bolt 36 that extends from the disc-shaped portion 24 of the grip member 22 to the magnet holding member 34 through the inside of the cylinder member 28 is provided. The plate-shaped portion 24, the cylinder member 28, and the magnet holding member 34 are integrally connected and fixed.

As shown in FIG. 2, the magnet holding member 34 is provided with eight mounting holes 38 which are open on the side of the superposing surface of the cylinder member 28 and are spaced apart from each other by a predetermined distance in the circumferential direction. The permanent magnets 40 are fitted and assembled into all or a suitable number of these mounting holes 38.

Each member constituting the stamper attaching / detaching device 10 is preferably formed of a non-magnetic material such as synthetic resin, and particularly, the supporting member 12 and the magnet holding member 34.
Is formed of a non-magnetic material. In addition, the permanent magnet 40 is
In either case, the N pole is located on one side in the axial direction of the magnet holding member 34,
It is preferable to arrange the S poles on the other side so as to be located respectively. The magnetic strength of the permanent magnet 40 is preferably set so that an attractive force sufficient to reliably hold the stamper on the support member 12 can be exerted on the stamper when attaching / detaching the stamper described later. .

The outer diameter of the tip end surface of the magnet holding member 34 is set smaller than the inner diameter of the signal area of the stamper so that it will not come into contact with the signal area when the stamper is held as described later. It is preferable. Further, it is preferable that the tip end surface of the magnet holding member 34 is smoothed by polishing or the like so as not to damage the stamper when it comes into contact with the stamper.

Next, with reference to FIGS. 3 to 6, a method of mounting and removing the stamper from the molding die for the optical disk substrate using the stamper attaching / detaching device 10 having such a structure will be described below. Explained.

In this embodiment, as shown in FIG. 6 which shows the completion of the mounting of the stamper, the fixed mold 42 is used.
The case where the stamper 44 is attached and detached will be described. First, the structure of the fixed mold 42 used in this embodiment will be briefly described with reference to FIG. That is, the fixed mold 42 cooperates with a movable mold (not shown) to form a disk substrate molding mold, and is molded with the movable mold to form a molding cavity for the disk substrate. Although not shown in the drawing, the fixed mold 4
2 is attached to the fixed plate of the mold clamping device, and a movable mold (not shown) attached to the movable plate of the mold clamping device is moved toward and away from the fixed mold 42, thereby The fixed mold 42 and the movable mold are adapted to be operated to close and open the mold.

Further, the fixed mold 42 is provided with a mirror surface plate 52 which is attached to a fixed plate of the mold clamping device through a back plate 50, and the mirror surface plate 52 constitutes a fixed side cavity forming surface 54. . In this embodiment, the stamper 44 is mounted on the cavity forming surface 54 of the fixed mold 42.

Further, in the central portion of the fixed mold 42, a back plate 50 and a mirror plate 52 are fitted and a cutter block 56 having a substantially thick-walled cylindrical shape is disposed, and an inner hole of the cutter block 56. A sprue bush 60 is inserted through the 58, and the cutter block 56 and the sprue bush 60 are fixed to the fixed mold 42 by a pressing ring 62. As a result, when the movable mold is matched with the fixed mold 42, a predetermined molding cavity is formed between the movable mold and the facing surface of the sprue bush 60 and the mirror surface plate 52, and the nozzle is formed in the sprue bush 60. The resin material injected from the touched injection device (not shown) is guided to the molding cavity through the inside of the sprue bush 60 and the cutter block 56. The inner hole 63 of the sprue bush 60 has a tapered shape whose diameter increases toward the molding cavity side.

Further, the cutter block 56 has an inner hole 58.
The female cutter 64 is configured by the inner peripheral edge portion of the inner edge (opening peripheral edge portion on the fixed side cavity forming surface 54 side), and a male cutter (not shown) provided in the movable mold is formed by the female cutter in the molding process of the disk substrate. The center hole of the disc substrate is punched out by being fitted into the disc 64. Further, the female cutter 64 in the cutter block 56
A fitting protrusion 66 protruding with a circular outer peripheral surface is formed on the axial end face on the side of the side, and the fitting protrusion 66 is fitted into the central hole 68 of the stamper 44, whereby the stamper 44 is fixed. The cavity forming surface 54 is positioned at a predetermined position.

Furthermore, a peripheral groove 70 is formed on the outer peripheral surface of the cutter block 56 so as to extend in the circumferential direction between the cutter block 56 and the mirror surface plate 52. The peripheral groove 70 connects the cutter block 56 and the mirror surface plate 52. It is communicated and opened on the fixed side cavity forming surface 54 through a gap between them. Furthermore, in the circumferential groove 70, the cutter block 56 and the back plate 50 are provided.
Is connected to an air passage 72 provided through
A negative pressure source and a positive pressure source are selectively connected to the circumferential groove 70 in accordance with the operation of the switching valve 74 arranged on the air passage 72. By connecting the circumferential groove 70 to a negative pressure source, the cutter block 5 is attached to the stamper 44 arranged on the fixed side cavity forming surface 54.
Negative pressure suction force is exerted through the gap between the mirror 6 and the mirror surface plate 52 so that the stamper 44 moves the fixed side cavity forming surface 54.
While being sucked and held on the upper side, by connecting the circumferential groove 70 to a positive pressure source, an air ejection force is exerted on the stamper 44 arranged on the fixed side cavity forming surface 54, and the stamper 44 is It is adapted to be levitated from the fixed side cavity forming surface 54. Although not shown, a negative pressure suction mechanism for sucking and holding the stamper 44 is generally held on the outer peripheral portion of the fixed side cavity forming surface 54 similarly to the inner peripheral portion, and the outer peripheral surface of the stamper is pressed and held. Known stamper holding means such as a holding ring mechanism is provided.

When the stamper 44 is mounted on the fixed mold 42 having such a structure, first, as shown in FIG. 3, the support member 12 of the stamper attaching / detaching device 10 is attached to the stamper 44. Insert it into the central hole 68. The supporting member 12 can be inserted into the central hole 68 of the stamper 12 in a wide space apart from the disk substrate molding die, so that the supporting member 12 can be easily inserted. As a result, the magnetic force of the permanent magnet 40 is exerted on the stamper 44, and the stamper 44 is attracted to the axial tip end surface of the magnet holding member 34. It will be held in place. Further, as is apparent from this, in this embodiment, the holding means is constituted by the permanent magnet 40 and the like.

Next, as shown in FIG. 4, the stamper attaching / detaching device 10 having the stamper 44 supported thereon is
By holding the gripping member 22 with fingers, etc., it is inserted between the fixed mold 42 and the movable mold (not shown) in the opened disk substrate molding mold and guided to the front of the fixed mold 42, and the stamper is attached / detached. The positioning pin 15 projecting from the support member 12 of the apparatus 10 is inserted into the inner hole 63 of the sprue bush 60 in the fixed mold 42 to perform a rough alignment, and then the support member 12 is further fixed to the fixed mold 42. The positioning projection 14 is fitted into the inner hole 58 of the cutter block 56 in the fixed mold 42, and the tip end surface of the support member 12 is superposed on the tip end surface of the fitting protrusion 66 in the fixed mold 42. Thereby, the support member 12 is fixed to the fixed mold 42.
Of the support member 12 that is coaxially aligned with the fitting protrusion 66 of the
The outer circumferential surface of the fitting projection 66 and the outer circumferential surface of the fitting projection 66 are connected flush with each other in the axial direction. As is clear from this, in the present embodiment, the positioning pin 15 and the positioning protrusion 14 constitute a positioning means for the support member 12. Further, a chamfering process is performed on the tip end side peripheral edge of the alignment protrusion 14 in a curved shape or a taper shape, and the inner hole 58 of the cutter block 56 of the alignment protrusion 14 (the inner periphery of the female cutter 64). Part) can be easily inserted.

Thereafter, as shown in FIG. 5, the holding member 22 of the stamper attaching / detaching device 10 is fixed to the fixed mold 4 with fingers or the like.
The housing 20 is pushed toward the second side, and the housing 20 is slid and moved to the axially distal end side of the support member 12 against the biasing force of the coil spring 32. As a result, the stamper 44 externally fitted to the support member 12 is pushed by the magnet holding member 34 and guided by the outer peripheral surface of the support member 12,
The support member 12 is moved to the front end side in the axial direction, further pushed out from the support member 12 and transferred to the fitting projection 66 side formed on the fixed mold 42, and thus the central hole of the stamper 44. 68 is fitted to the outer peripheral surface of the fitting protrusion 66, the stamper 44 is positioned by the fitting protrusion 66, and is disposed on the fixed side cavity forming surface 54.

Before or after the transfer of the stamper 44 onto the fixed-side cavity forming surface 54 is completed, the air passage 72 of the fixed mold 42 is connected to a negative pressure source to form the fixed-side cavity. A negative pressure suction force is exerted on the inner peripheral portion of the stamper 44 transferred onto the surface 54.
In this embodiment, the stamper 4 is passed through the air passage 72.
The negative pressure attraction force exerted on No. 4 is set to be at least larger than the attraction force exerted on the stamper 44 by the permanent magnet 40 of the stamper attaching / detaching device 10.

Thereafter, as shown in FIG. 6, the stamper attaching / detaching device 10 is pulled away from the fixed die 42 to detach the stamper 44 from the stamper attaching / detaching device 10 to form the fixed side cavity of the fixed die 42. The surface 54 is sucked and held. This completes the work of mounting the stamper 44 on the fixed mold 42.

The stamper 44 can be removed from the fixed mold 42 by performing the above-described mounting steps in order from the opposite side. Also,
In that case, the stamper 44 is attached to the fixed side cavity forming surface 54.
When the stamper attaching / detaching device 10 is detached from the stamper attaching device 10 and is held by the stamper attaching / detaching device 10, it is effective to connect the air passage 72 of the fixed mold 42 to a positive pressure source and exert an air discharge force on the stamper 44. It is possible to reliably separate from the fixed side cavity forming surface 54.

That is, the stamper attaching / detaching device 1 as described above.
If 0 is used, the stamper 44 is directly grasped by fingers and fitted into the fitting protrusion 66 of the fixed mold 42, or the fitting protrusion 6
6, the stamper 44 supported by the support member 12 is guided and fitted into the fitting protrusion 66 by the guiding action of the support member 12, or is removed from the fitting protrusion by the attraction action of the permanent magnet 40. Therefore, it is possible to effectively prevent the stamper 44 from being soiled, damaged, or roughened due to the contact of fingers with the stamper 44, etc., and to secure the stamper 44 to the fixed mold 42. Moreover, it is possible to quickly attach and detach, and the workability of attaching and detaching the stamper 44 to and from the fixed mold 42 is dramatically improved.

Further, in the stamper attaching / detaching device 10 of this embodiment, the sprue bush 60 and the cutter block 5 are provided.
Since the support member 12 is aligned with the fixed-side cavity forming surface 54 by the alignment pin 15 and the alignment protrusion 14 that are inserted into the inner hole of 6, the structure of the alignment means is simple. In addition to the above, the positioning protrusions 14 perform reliable positioning after the positioning pins 15 have roughly performed positioning, and therefore, there is an advantage that the positioning can be performed easily and quickly. .

Furthermore, the stamper attaching / detaching device 1 of this embodiment
At 0, by providing the cylinder member 28 that can slide the outer peripheral surface of the support member 12 in the axial direction,
The transfer means is configured to include the cylinder member 28, and the stamper 44 is inserted into and supported by the support member 12.
When the stamper 44 is moved in the axial direction, the inner peripheral portion of the stamper 44 is uniformly extruded over the entire circumference, so that the stamper 44 is transferred smoothly and no excessive force is applied. There are also advantages.

The embodiments of the present invention have been described in detail above, but these are literal examples and the present invention should not be construed as being limited to such specific examples.

For example, in the stamper attaching / detaching device, it is possible to use an electromagnet instead of the permanent magnet, or, as shown in FIG. 7, a suction holding member 78 having the same structure as the magnet holding member. An air passage 80 that opens to the axial tip end surface with which the stamper abuts is formed inside, and the negative pressure suction force of the air exerted through the air passage 80 is utilized to move the stamper to a predetermined position by the support member 12. It is also possible to hold the insertion support position. In FIG. 7, in order to facilitate understanding,
Members and parts having the same structures as those in the above-mentioned embodiment are designated by the same reference numerals as those in the above-mentioned embodiment.
And, if you use the electromagnet and negative pressure attraction force like this,
It is possible to cut the adsorption holding force for the stamper,
When the stamper is arranged on the cavity forming surface of the fixed mold, by cutting off the suction holding force, the mounting operation of the stamper on the cavity forming surface can be performed more reliably. Further, at that time, if an ON / OFF switch of the electromagnet or the suction holding force by the negative pressure suction force is attached to the stamper attaching / detaching device, the workability can be further improved.

Further, in the above embodiment, the disk substrate molding die in which the stamper 44 is mounted on the fixed mold 42 side has been described, but the invention is also applicable to the molding die in which the stamper is mounted on the movable mold side. Similarly applicable is
Of course.

Although not listed one by one, the present invention
Based on the knowledge of those skilled in the art, it can be implemented in various modified, modified, and improved modes, and
It goes without saying that all such embodiments are included in the scope of the present invention without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is an explanatory longitudinal sectional view showing an embodiment of a stamper attaching / detaching device having a structure according to the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a cross-sectional explanatory view for explaining one step of mounting the stamper on the molding die according to the method of the present invention using the stamper attaching / detaching device shown in FIG.

FIG. 4 is a cross-sectional explanatory view for explaining the step of mounting the stamper according to the method of the present invention, which is subsequent to FIG. 3;

5 is a cross-sectional explanatory view for explaining the step of mounting the stamper according to the method of the present invention, which is subsequent to FIG.

FIG. 6 is a cross-sectional explanatory view for explaining the step of mounting the stamper according to the method of the present invention, which is subsequent to FIG. 5;

FIG. 7 is a vertical cross-sectional explanatory view showing another embodiment of the stamper attaching / detaching device having the structure according to the present invention.

[Explanation of symbols]

 10 Stamper Attaching / Detaching Device 12 Supporting Member 14 Positioning Protrusion 15 Positioning Pin 20 Housing 32 Coil Spring 40 Permanent Magnet 42 Fixing Mold 44 Stamper 54 Fixed Side Cavity Forming Surface 66 Fitting Protrusion 72 Air Passage

Claims (2)

[Claims] 1. A disk substrate molding die is superposed on a cavity forming surface, and is positioned by being fitted to an outer peripheral surface of a fitting protrusion projectingly provided on the cavity forming surface and fixed by suction to the cavity forming surface. A stamper attachment / detachment device for attaching / detaching an annular plate-shaped stamper to / from such a cavity forming surface, the support member being inserted into a central hole of the stamper to support the stamper, and the stamper being inserted in the support member. Holding means for holding the supporting member at a supporting position, and by aligning the supporting member with respect to the cavity forming surface, the tip end surface of the supporting member is coaxially overlapped with the protruding tip end surface of the fitting protrusion. Positioning means for connecting the outer peripheral surface of the supporting member to the outer peripheral surface of the fitting projection in the axial direction, and an insertion supporting position in the supporting member. And a transfer unit that moves the stamper held by the support member to the tip end side of the support member and transfers the stamper to the fitting protrusion side that is superposed on the protruding tip end surface of the support member. A stamper attaching / detaching device. 2. An annular plate-shaped stamper is superposed on a cavity forming surface of a disk substrate molding die, and is fitted and positioned on an outer peripheral surface of a fitting projection protruding from the cavity forming surface, and When the stamper is attached to the cavity forming surface by suction-fixing to the cavity forming surface, a support member is inserted through the central hole of the stamper to support the stamper, and then the tip end surface of the supporting member is formed into the cavity forming surface. The projection is provided on the surface of the fitting projection so as to be aligned with the projection tip surface, and then the stamper is transferred from the support member side to the fitting projection side, and the stamper is moved with respect to the cavity forming surface. A method of mounting a stamper, characterized in that the supporting member is detached from the fitting protrusion after being fixed by suction.