JPS61258883A - Temporary bonding method - Google Patents

Abstract

PURPOSE:To prevent the relative shift between a pair of parts effective in the production of a sandwiched optical disk or a transfer mold for an optical disk, by aligning the parts before the hardening of an adhesive and temporarily fixing the parts with other adhesive. CONSTITUTION:For example, in the production of a transfer mold of an optical disk, an adhesive 2 is sandwiched between the main body 6 and the supporting member 7 and the head-guiding groove of the main body 6 is aligned to the inner circumference of the supporting member 7. An ultraviolet-curable adhesive is applied to the side faces of the main body 6 and the supporting member 7 and cured with ultraviolet radiation. Therefore, the adhesive 2 is hardened at normal temperature to complete the production of the transfer mold.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] When two members are fixed with an adhesive, they are aligned before the adhesive hardens, and temporarily fixed with another adhesive to prevent the members from shifting.

[Industrial application field]

The present invention relates to a method for preventing displacement of members during adhesion, which is particularly useful in manufacturing sand-inch type optical disks and optical disk transfer types, which require strict adhesion accuracy.

[Conventional technology and problems]

When manufacturing articles consisting of two parts, especially optical discs and optical disc transfer molds, a slow-curing two-component epoxy resin with excellent adhesive handling and adhesive ability is used. There is a drawback that the two members are misaligned.

[Means for solving problems]

The above problem lies in the bonding method in which the adhesive applied to the adhesive surfaces of two parts is aligned before it hardens, and the two parts that have been aligned are fixed with another adhesive before the adhesive hardens. This problem can be solved by a temporary adhesion method characterized by:

It is preferable that the adhesive for temporary fixing be an ultraviolet curable adhesive and be rapidly cured by irradiation with ultraviolet rays.

〔Example〕

An epoxy adhesive (CEMEDINE, EP
00B) 2 and after placing and aligning the inner and outer spacer rings 3.4 on top of this (bl).
C) Apply an ultraviolet curable adhesive (
ThreeBond Co., Ltd., UVX-E211) 5 was applied and cured by irradiation with ultraviolet rays, and the spacer ring 3.4 was temporarily fixed to the veneer 1.

(d1) Next, apply the adhesive 2 to the upper surfaces of these spacer rings 3 and 4, place and align the other optical disc veneer 6, and (f) attach the veneer 6 and the outer spacer ring 4. After temporarily fixing them in the same manner as in step (C), the adhesive 2 was cured at room temperature for about 24 hours to produce a sandwich-type optical disc.

The main body of the Daishi five-main transfer mold was made by irradiating a resist-coated annular glass plate with laser light to form a recess for the head guide groove, and then vapor depositing nickel thereon, and then forming a nickel plating layer. The nickel layer was peeled off from the glass disk and adhered to the annular reinforcing plate to form an annular transfer mold main body 6. The alignment support 7 was an annular stainless steel plate having a highly accurate hole of 351 mφ in the center.

(a) Adhesive 2 was sandwiched between the main body 6 and the support 7, and the head guide groove of the main body 6 was aligned with the inner circumference of the support 7. (
b) Apply the ultraviolet curable adhesive used in Example 1 to several equally spaced points across the sides of the main body and the support 7, cure it by irradiating it with ultraviolet rays, and then apply the adhesive 2 at room temperature. Approximately 2
A transfer mold was manufactured by curing for 4 hours.

〔Effect of the invention〕

According to the present invention, two members can be bonded without causing any displacement, and in the case of a sandwich type optical disk or an optical disk transfer type, the displacement can be reduced to 10 μm or less.

[Brief explanation of drawings]

FIG. 1 is a process diagram for manufacturing a sandwich type optical disc according to the present invention, and FIG. 2 is a process diagram for manufacturing an optical disc transfer type according to the present invention. 1.6... Optical disk single plate, 2... Adhesive, 3.
4...Spacer ring, 5...Fast-curing adhesive, 7.
...Transfer mold body, 8...Transfer mold alignment support. Sandwich type optical disc manufacturing process diagram Figure 1

Claims (1)

[Claims] 1. An adhesion method in which two members are aligned before the adhesive applied to their adhesive surfaces hardens, and the two members aligned before the adhesive hardens are bonded together by another adhesive. A temporary adhesion method characterized by fixation using an agent. 2. The method according to claim 1, wherein the temporary fixing adhesive is an ultraviolet curable adhesive and is cured by irradiation with ultraviolet rays. 3. The method according to claim 1, wherein the two members are a single optical disk, or a single optical disk and a spacer ring. 4. The method according to claim 1, wherein one member is an optical disc transfer mold main body and the other member is an optical disc transfer mold aligning support.