JPS61292242A - Manufacture for ring laminated body - Google Patents

Abstract

PURPOSE:To decrease the eccentricity between a ring laminator and a ring single body by abutting three measuring terminals of an inner diameter measuring meter movable along an axial line on the inner circumference of each ring single body so as to match the position of the ring single body. CONSTITUTION:The ring single plate 1 is placed on a ring turning table 2, the inner diameter measuring meter 3 is moved from downward along the axial line, the three measuring terminals 4 are spread and the position of the single plate 1 is adjusted so that they are allowed to contact respectively with the inner circumference edge of the single plate 1. After the measuring meter 3 is moved downward, an adhesives is coated to the inner and outer circumference of the upper face while the single plate is being turned and a couple of spacer rings 5, 6 are placed. After the adhesives are applied to the upper face of the spacer rings 5, 6, other ring single plate 7 is placed on the rings 5, 6, the plate 7 is matched by using the meter 3 with the similar operation and bonded.

Description

[Detailed Description of the Invention] [Summary] When bonding a plurality of annular veneers having substantially the same inner diameter, three measuring terminals of an inner diameter measuring meter movable along the axis are attached to each annular veneer. A method for manufacturing an annular laminate in which the positions of these annular veneers are aligned by bringing them into contact with the inner periphery of the annular veneer.

[Industrial application field]

The present invention is a method for manufacturing an annular laminate that is particularly useful for manufacturing sand-inch optical discs.

[Conventional technology]

As a method for bonding a plurality of annular veneers having substantially equal inner diameters by aligning the inner peripheral ends of these annular veneers,
Conventionally, the inner peripheral ends of these annular veneers were aligned using a central axis having an outer diameter slightly smaller than the inner diameter of each annular veneer as a guide.

[Problem to be solved]

According to this method, in order to reduce the deviation of the inner peripheral edges of the veneers in an annular laminate, it is necessary to reduce the fitting tolerance between the inner diameter of each annular veneer and the outer diameter of the central axis.
On the other hand, in order to facilitate attachment and detachment of the veneer to the central axis, the tolerance needs to be approximately 50 μm.

[Means for solving problems]

The above problem is a method for manufacturing an annular laminate in which a plurality of annular veneers having substantially the same inner diameter are aligned and bonded together,
Adjust the position of the annular veneer 1 by bringing the three measurement terminals 4, which are located at positions that equally divide the full angle around the axis of the inner diameter measuring meter 3 into three, into contact with the inner peripheral end of one annular veneer 1. Then, place the next annular veneer 5 on top of the previous annular veneer 1, and connect the measurement terminal part 4.
This annular veneer 5 is removed from the previous annular veneer 1 and moved along the axis of the inner diameter measuring meter 3 to the next annular veneer 5.
The present invention is solved by a method for manufacturing an annular laminate, characterized in that it includes a step of aligning the annular veneer 1.5 by bringing it into contact with the inner circumferential edge of the annular veneer 1.5.

A pressure-sensitive element 8 is provided on each end surface of the three measurement terminal parts 4 of the inner diameter measuring meter 3 that abuts the inner peripheral end of the annular veneer 1, and the output of each pressure-sensitive element 8 is detected, and these outputs are equal. It is preferable to adjust the position of the annular veneer 1 so as to indicate the value.

The manufacturing method of the present invention can be particularly advantageously applied to manufacturing a sandwich-type optical disc in which two optical discs are bonded together with or without a spacer ring.

Even in the case of a single-plate optical disc, eccentricity cannot be avoided between the center of the information recording guide groove and the center of the inner peripheral edge. In the case of a sand-inch type disc, there is a misalignment between the center of each veneer and the center of the laminate, so that the eccentricity is greater than in the case of a veneer. To prevent this, it is necessary to strictly align the inner peripheral edges of the veneers.

〔Example〕

Example 1 (al) An annular veneer 1 was placed on an annular rotary table 2, and an inner diameter measuring meter (Sanjo Seisakusho, Hall Tester) 3 was moved from below along the axis to measure three measurement terminals 4. Adjust the position of the veneer 1 so that it is at the same height as the veneer 1, spread each terminal part 4, and touch the inner peripheral edge of the veneer 1, thereby aligning the veneer 1 with the measuring meter 3. Ta.

(b) In this state, the veneer 1 is fixed on the rotary table 2 by vacuum suction, the terminal part 4 is removed from the inner peripheral edge of the veneer 1, the measuring meter 3 is moved downward, and the veneer 1 is Adhesive was applied to the inner and outer peripheries of the upper surface while rotating.

(C) A pair of spacer rings 5 and 6 are placed on the inner and outer peripheries of the veneer 1, respectively, and the inner ring 5 is removed during the process (
It was aligned with measuring meter 3 by the same operation as in a) and bonded.

fd) After applying adhesive to the upper surfaces of the inner and outer spacer rings 5 and 6, another annular veneer 7 is placed on top of these rings 5 and 6, and the process (al) is carried out in the same manner as in al. It was aligned with measuring meter 3 and glued.

The eccentricity between the inner circumferential end of the obtained laminate and the guide groove \ of each veneer 1.7 increased by no more than 10 μm from the eccentricity of each veneer itself.

The inner diameter measuring meter 3 has a pressure sensitive element 8 on the end face of the three measuring terminal parts 4 for contacting the inner circumferential end of the annular veneer 1. On the other hand, three micrometers 9 are provided on the outer circumferential edge of the veneer 1 on the same radius as the pressure-sensitive element 8, and a control device (not shown) detects the output from the pressure-sensitive element 8, and according to this output. One of the motors 10 is energized. The micrometer 9 is the same as in Example 1, except that the veneer 1 is aligned with the measuring meter 3 by driving the veneer 1 in the radial direction and equalizing the output from each pressure-sensitive element 8. This was carried out to obtain an annular laminate.

〔Effect of the invention〕

According to the present invention, the eccentricity between the annular laminate and the annular unit is 10
It can be set to less than μm. This can be achieved even if there is a difference of 1) in the inner diameters of the annular veneers.

Furthermore, by automating the adjustment of the position of the annular veneer, it is possible to reduce operational errors and variations in accuracy between operators.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an apparatus for implementing the manufacturing method of the present invention, and FIG. 2 is a cross-sectional view of an apparatus for implementing the manufacturing method of the present invention. 1.7... Annular single plate, 2... Annular rotary table,
3... Inner diameter measuring meter, 4... Measuring terminal section, 5...
- Inner circumference spacer ring (annular single plate), 6... Outer circumference spacer ring, 8... Pressure sensing element, 9... Micrometer, 10... Motor.

Claims (1)

[Claims] 1. A method for manufacturing an annular laminate in which a plurality of annular veneers having substantially the same inner diameter are aligned and bonded, the full width centered on the axis of the inner diameter measuring meter (3) being 3. Adjust the position of this annular veneer (1) by bringing the three measurement terminals (4) at equal dividing positions into contact with the inner peripheral edge of one annular veneer (1), and then move the next annular veneer. (5) on the previous annular veneer (1), remove the measurement terminal part (4) from the previous annular veneer (1), and move it along the axis of the inner diameter measuring meter (3). It is characterized by including the step of moving the annular veneer (5) and then bringing it into contact with the inner peripheral end of the annular veneer (5), thereby aligning the annular veneers (1) and (5). , a method for manufacturing an annular laminate. 2. A pressure-sensitive element (8) is provided on each end surface of the three measurement terminal parts (4) of the inner diameter measuring meter (3) that abuts the inner peripheral end of the annular veneer (1), and each pressure-sensitive element (8) ) is detected, and the annular veneer (1), (
5) The manufacturing method according to claim 1, wherein the position of step 5) is adjusted. 3. Multiple annular veneers form two optical disc veneers (1), (
7), the manufacturing method according to claim 1. 4. A plurality of annular veneers form two optical disc veneers (1),
(7) and inner and outer spacer rings (5),
(6), place the optical disk single plate (1), spacer rings (5), (6), and optical disk single plate (7) in this order, and then place the optical disk single plate (1) before, and the spacer ring on the inner circumference. The manufacturing method according to claim 1, which includes the steps of (5) and sequentially aligning each inner peripheral edge of the next optical disc single plate (7).