JPS63256165A - Method for fixed rate discharging of anaerobic liquid - Google Patents

Abstract

PURPOSE:To permit complete prevention of gelation and solidification of an anaerobic liquid at the sliding part of a plunger and control of a discharge liquid flow rate with high accuracy by constituting a fixed flow dispenser unit in such a manner that a plunger and auxiliary liquid come into direct contact, the auxiliary liquid and discharge liquid come into direct contact and the plunger and the discharge liquid do not come into direct contact. CONSTITUTION:The anaerobic liquid (e.g., UV curing adhesive agent) 22 is discharged and sucked in the fixed flow disenser unit according to the reciprocating motion of the plunger 24 in said unit. The unit is so constituted that the plunger 24 and the auxiliary liquid 23 (e.g., silicone oil) come into direct contact, the auxiliary liquid 23 and the discharge liquid 22 come into direct contact and further the plunger 24 and the discharge liquid 22 do not come into direct contact. The sp. gr. of the adhesive agent 22 is about 1.0-1.2 and the sp. gr. of the auxiliary liquid 23 is about 0.8-0.95. The adhesive agent 22 and the auxiliary liquid 23 are the materials which make complete phase sepn. and do not mix with each other. As a result, the gelation and solidification of the anaerobic liquid in the mechanical sliding part of the plunger and cylinder are thereby completely prevented and the discharge liquid flow is controlled with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical recording medium from which information can be read and recorded using laser light.

[Conventional technology]

Conventionally, methods for applying a fixed amount of a liquid VCC agent include a method of extruding a fixed amount using gas pressure, and a method of extruding a fixed amount using a metering piston method.

[Problem that the invention seeks to solve]

When using gas pressure, the discharge accuracy of the discharge amount was poor and it was not suitable for bonding precision parts. In the metering piston system, the anaerobic liquid gels and solidifies in the mechanical moving parts of the piston and cylinder (73), making it impossible to discharge the anaerobic liquid.

The present invention solves the above-mentioned drawbacks of the conventional method, and aims to improve the dispensing accuracy of an anaerobic liquid and to provide a method for dispensing a fixed amount that does not gel or solidify.

[Means for solving problems]

The method for dispensing a fixed amount of anaerobic liquid according to this patent is that the plunger and the indirect liquid are in l' The plunger and the discharged liquid are in direct contact with each other, and the plunger and the discharged liquid are not in direct contact.

[Example 1] Fig. 1 shows a cross-sectional view of an optical recording medium manufactured using the anaerobic liquid discharging method of the present invention. 1.6μm1
The groove rllO is 8 μm and the groove depth is 600 mm. 2 is a dielectric housing, which is a composite film of silicon nitride and aluminum nitride, 1000mm thick, and A4゜3 is a dielectric housing with magneto-optical distribution ON (TbFcC
o) 800 thick A5 is a dielectric housing made of silicon nitride aluminum nitride composite film, 800 thick. 4 is a smooth polycarbonate substrate with a thickness of 1.2 mm. 6 is an ultraviolet curing VC adhesive (UV adhesive) and has a thickness of 30 μm.

FIG. 2 shows a schematic diagram of the apparatus for bonding the substrates of the optical recording medium shown in FIG. 1. 9 is a gate valve, 10 is a vacuum chamber/bar, 11 is a vacuum pump, 12 is a motor, 1
3 is a tfifi agent dispensing nozzle, 14 is a dispensing nozzle moving unit, 15 is a quantitative dispensing unit, 16 is a substrate holding arm, 17 is a substrate 8 dropping f
[This is a magnetic switch.

FIG. 3 does not show the method of dispensing an anaerobic liquid according to the present invention in which the adhesive is quantitatively delivered to the dispensing nozzle 13 in the quantitative dispensing unit 15 (7) without mechanically sliding the adhesive. 21 is a check valve, 22 is a UV adhesive, and 23 is an indirect liquid silicone oil KFOGL (manufactured by Shin-Etsu Chemical Co., Ltd.). 25 is the 0 ring. The check valve 21 closes in accordance with the reciprocating movement of the plunger 24, and the UvIj 22::
The adhesive is quantitatively delivered to the dispense nozzle 13. U
The specific gravity of the V-adhesive is 1°0 to 1.21F, while the specific gravity of the indirect liquid 23 is 0.8 to 0.05F, 1°. UV
The adhesive and indirect liquid are completely phase-separable materials, so they do not mix. As a result of the above, it has become possible to dispense a fixed amount of UVtity agent without the UV adhesive entering between the plunger and the cylinder. Even after 10,000 times of dispensing experiments, there were no problems with the metered dispensing section.

Although silicone oil with a light specific gravity was used as the indirect liquid used in the present invention, any liquid may be used as long as it completely phase separates from the anaerobic liquid and has a specific gravity. In this case, even if the ratio m is heavy, it can be used by placing the indirect liquid in Example 1 below the anaerobic liquid. As an anaerobic liquid,
Although UV protection agent was mentioned in the example, acrylate resin
The present invention is applicable to all liquids that are composed of materials with anaerobic properties, such as monomers, methacrylate monomers, acrylate oligomers, and methacrylate oligomers, or liquids in which anaerobic materials are mixed in a part of the liquid.

〔Effect of the invention〕

According to the present invention, gelation and solidification of the anaerobic liquid at the mechanical sliding part of the piston and cylinder can be completely prevented, which could not be prevented with the conventional metering piston system, and the amount of liquid discharged can be reduced. This has the effect of allowing highly accurate control.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an optical recording medium manufactured using the discharging method of the present invention. FIG. 2 is a schematic diagram of a substrate bonding apparatus for an optical recording medium. Schematic diagram of the method Figure 4 is a schematic diagram of the conventional piston type discharge method Applicant: Seiko Epson Corporation Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In the quantitative discharge part that discharges and inhales anaerobic liquid according to the reciprocating motion of the plunger, the plunger and the indirect liquid are in direct contact, the indirect liquid is in direct contact with the discharged liquid, and the plunger and the discharged liquid are in direct contact. A method for dispensing a fixed amount of anaerobic liquid, which is characterized by no contact.