JPS6047063B2 - Pitch peeling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for peeling a pitch used for attaching a lens to a jig from a jig after polishing a lens.

Conventionally, as a method of this kind, a method has been proposed in which the pitch is heated by high-frequency heating to thermally melt and the pitch is peeled off from a jig in a state where the pitch and the lens are bonded together.

However, with this method, when the pitch is melted by heat, fumes are generated, which has a negative impact on the health of the workers, and the pitch is not completely removed from the jig and remains partially on the jig, which requires post-processing. It had drawbacks such as being cumbersome.
Another method for peeling the pitch from the jig is to cool the jig itself in a low-temperature room (e.g. -40°C) for about 1 hour, and then remove the difference in the shrinkage rates of the jig, pitch, and lens. A method has been proposed to remove them based on
When the lens is taken out of the cold room, moisture in the air condenses and adheres to the lens, resulting in a high rate of so-called lens tanning, which causes chemical changes on the lens surface. The present invention was made in view of the deficiencies of the conventional methods, and it is an object of the present invention to provide a method which is extremely excellent in practice and which allows pitch to be easily peeled off from a jig at room temperature without any melting.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of an embodiment of the present invention will be explained below with reference to the drawings.

In the figure, 1 is a metal jig, 2 is a large number of lenses fixed to the jig 1 with adhesive pitch 3, and 4 is a polishing tool.

After polishing the lens, the jig 1 is placed on the table 5 and ultrasonic vibration is applied to the jig 1 by the ultrasonic vibrator 6.
, pitch 3, and lens 2, and due to the nature of ultrasonic vibration, large internal stress occurs particularly at the joint between jig 1 and pitch 3 and the joint between pitch 3 and lens 2. Since acoustic vibrations are attenuated the farther they go, a separation phenomenon occurs at the joint between the jig 1 and the pitch 3, which is close to the vibration source.

Note that if the adhesive force between pitch 3 and lens 2 is weaker than the adhesive force between jig 1 and pitch 3, a peeling phenomenon will occur between pitch 3 and lens 2 first, but then ultrasonic vibration is applied. jig 1
If the pitch 3 is applied to the jig 1, the pitch 3 will be peeled off from the jig 1. According to this embodiment, the pitch peeling work can be performed at room temperature without adversely affecting the operator or the lens, and the pitch 3 is completely peeled off from the joint with the jig 1 to 7. It has many advantages such as easy post-processing because no part remains on the jig 1, and the fact that the pitch 3 can be peeled off from the jig by applying ultrasonic vibration for a few seconds, which is extremely efficient. be effective.

It is of course possible to separate the pitch from the jig by applying ultrasonic vibration to the pitch, but if the pitch is not continuous but separate as shown in Figure 1, each pitch can be separated from the jig. The peeling operation must be performed by applying ultrasonic vibration to each pitch, which is more troublesome than in the previous embodiment.

As described in detail above, the present invention applies ultrasonic vibration to a jig to which pitch has adhered after lens polishing to peel off the pitch from the jig, without melting the pitch at room temperature. This provides a method that allows peeling from the jig in an extremely short time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a lens polishing device, and FIG. 2 is a schematic diagram of a device for peeling pitch from a jig. In the figure, 1 is a metal jig, 2 is a lens, 3 is a pitch, 4 is a polishing tool, and 6 is an ultrasonic vibrator.

Claims (1)

[Claims] 1. After attaching a lens to a metal jig using pitch as an adhesive and polishing the lens, ultrasonic vibration is applied to the jig or the pitch portion so that at least the pitch is separated from the joint with the jig. A pitch peeling method characterized by: