JP2013104869A - Resin cure shrinkage measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that resin shrinkage due to resin curing causes troubles such as slippage and distortion of adhesive members, one-side detachment, and adhesion failure, and even a small shrinkage, when fixing a precision component and an optical component, may lead to slippage of an optical axis to cause a trouble.SOLUTION: The resin cure shrinkage measuring instrument, while curing an adhesive resin, measures the shrinkage thereof and obtains a shrinkage ratio of the resin. When the shrinkage ratio is obtained, it becomes possible to design the component arrangement, with the resin shrinkage previously taken into account. Further, the shrinkage ratio may become basic data in inferring a cause so as to shorten a time for dissolving the trouble.

Description

  In the present invention, when a resin such as an adhesive or a coating agent is applied, and then the resin is cured by ultraviolet irradiation, light irradiation, heating, or the like, the volume of the resin is decreased, and thus the curing shrinkage is measured. If the volume of the cured resin can be predicted, the product can be designed in consideration of the shrinkage. Therefore, a device for measuring the shrinkage of shrinkage that can make a normal product by placing a member at the target position after shrinkage is provided. is there.

When fixing electronic parts and optical parts, use UV curable resin with relatively small cure shrinkage. However, when manufacturing a precise product, the shrinkage of the resin that occurs when the resin is cured may be a problem. If the shrinkage rate of the resin before and after curing can be grasped, it can be designed in consideration of the product design, so there are many requests for an apparatus for measuring the shrinkage rate, and the device of the present invention has been manufactured. The measurement of resin shrinkage is not limited to ultraviolet curable resins, but can be similarly performed on photoreactive resins and heat-reactive resins, and has a wide range of applications.

Resin is applied to film lamination or coating and cured. The phenomenon of film curling and distortion varies depending on the shrinkage ratio of the resin part. If the shrinkage of the resin can be measured in advance, it can be compared when selecting the coating material. In addition, the thickness and waist of the film to be coated can be examined. Alternatively, when selecting the thickness of the resin to be coated, if the shrinkage rate of the resin is known in advance, the resin selection branch is expanded.

Japanese Patent Application Laid-Open No. 08-011471 "IC Card Substrate Reinforcing Frame, Card Substrate Manufacturing Method, and IC Card Manufacturing Method" Japanese Patent Application Laid-Open No. 08-314126 "Method for making a photosensitive resin plate"

When bonding or coating, most resins such as one-component curable resins, two-component curable resins, ultraviolet curable resins, and photoreactive resins shrink after curing compared to uncured. The shrinkage of the resin accompanying the curing of the resin causes problems such as displacement, distortion, detachment and poor adhesion of the adhesive member.

Some shrinkage is also seen in the UV curable resin, which is said to have relatively little shrinkage. Even when the shrinkage rate is small for fixing precision parts and optical parts, the optical axis shifts and causes trouble.

With UV curable resins, the adoption of new resins is increasing due to the ease of workability and the improvement of workability by short-time curing, but their curing shrinkage is a characteristic of each manufacturer or by product number. Therefore, it is necessary to digitize it, but currently the measurement method is difficult and undeveloped.

The shrinkage rate of the resin is grasped by measuring the shrinkage while curing the adhesive resin. If the shrinkage rate can be grasped, it is possible to design the component arrangement taking into account the resin shrinkage in advance.
In addition, it is helpful in inferring the cause, and trouble resolution is shortened.

Resin shrinkage during coating and laminating greatly affects quality. If the shrinkage rate of the resin, which causes curling and distortion due to the shrinkage of the resin, is known in advance, it becomes easy to take countermeasures.

As shown in FIG. 3, the ultraviolet curable resin is irradiated with ultraviolet rays from the bottom to promote the curing of the resin. From the surface, the distance is measured with a laser sensor. The thickness of the entire resin can be measured by the surface distance before and after curing.

The outer frame that contains the cured resin uses a resin that is difficult to adhere, such as fluororesin.The cured resin shrinks when cured, so if you adhere to the outer frame, it will be pulled around and you will not be able to measure the exact thickness or surface area. Since it shrinks in a free state without bonding, the diameter can be measured, and the surface area can be measured together with the thickness, so that the volume can be calculated. Thereby, before and after curing shrinkage can be quantified.

Since the shrinkage of the cured resin can be grasped, the position where the member is accommodated can be predicted. With this, the resin curing can be calculated and arranged in advance at the time of design. Since the shrinkage varies depending on the resin, the specifications can be determined after sufficient verification.

The resin curing shrinkage measuring apparatus of the present invention can be used for fixing members of optical equipment and precision electronic equipment. Conventionally, it has been used without knowing the cure shrinkage of the resin, and when a malfunction of unknown cause occurred, the countermeasure could not be accurately quantified, but design by predicting the change of the resin in advance with the device of the present invention I can do things.

Curling and distortion that occur during film lamination and coating are often due to cure shrinkage of the resin. If the cure shrinkage rate of the resin is known in advance, the problem can be grasped in advance by simulation. It is possible to prevent problems by predicting problems and taking measures in advance.

Fig. 1 is a cross-sectional view of the optical component before fixing the resin 2 is a cross-sectional view of the optical component after the resin is cured at the fixed position. 3 is a cross-sectional view of a resin curing shrinkage measuring apparatus. 4A is a cross-sectional view before curing the resin, and FIG. 4B is a plan view. 5A is a cross-sectional view after curing the resin, and FIG. 5B is a plan view.

  The resin (11) is put into the outer frame provided on the glass plate, the thickness and surface area of the resin before curing are measured, and the resin is cured by irradiating ultraviolet rays (10) from the bottom of the glass plate. By measuring the thickness and surface area of the resin after curing, the resin volume after curing can be determined. By comparing the volume before and after curing, the shrinkage ratio of the resin can be quantified and grasped.

The outer frame (12) provided on the glass surface is made of fluororesin. When the resin is cured, it is attached to the surroundings so that it is not pulled or deformed. The fluororesin does not adhere, so the outer periphery of the cured resin is free. It becomes a state and a uniform shrink resin can be realized.

UV-LED is used for the ultraviolet irradiation part (9) irradiated from the lower part of a glass plate. UV-LED is compact and can be installed in a narrow space. In addition, since it generates little heat and does not require preliminary lighting, it can be lit at the moment it is used, so the measuring device is easy to handle.

UV-irradiated UV-LEDs have a single wavelength of 365 nm or 385 nm and are easy to handle without risk of ozone generation. For this reason, peripheral devices, such as an exhaust apparatus and a light-shielding device, are unnecessary, and an installation place is not chosen.

In FIG. 1, the resin is uncured in a state where the resin is applied for fixing the optical component.

FIG. 2 shows that when the optical component is fixed, the optical axis is shifted due to the resin being cured and contracted due to the curing shrinkage of the resin.

FIG. 3 is an overall view of the resin curing shrinkage measuring apparatus. The resin is poured into the outer frame, and the resin is cured by irradiating ultraviolet rays from the lower UV-LED (9). The distance and area are measured with a laser sensor (7) from the surface, and the change in the resin is measured and digitized.

4 and 5 show the state of volume change before curing (11) and after curing (18) of the ultraviolet curable resin. When each surface area and thickness is measured, the volume is calculated.

  Table 1, Table 2, and Table 3 show the measured shrinkage of the UV curable resin manufactured by Chemtech. Depending on the configuration of the cured resin, the cured state varies depending on the product number. Some cure slowly and others cure faster. The shrinkage at the end of curing is also different. By grasping this content, it is possible to design the fixing of parts for precision equipment.

The fact that the shrinkage after curing of the resin can be measured is not limited to the ultraviolet curable resin, but the cure shrinkage of any resin such as a one-component curable resin, a two-component curable resin, a photoreactive resin, and a thermo-responsive resin can be measured. This can be dealt with by quantifying what has been dealt with by empirical values when there is a problem with shrinkage of the resin in the past, so it becomes possible to take more accurate measures for every application to cure the resin.

DESCRIPTION OF SYMBOLS 1 Lens 2 Resin before hardening 3 Fixed part 4 Optical axis 5 at the time of design 5 Moved optical axis 6 Resin after hardening 7 Laser sensor 8 Distance measurement with laser light 9 UV-LED
DESCRIPTION OF SYMBOLS 10 Ultraviolet irradiation 11 Resin before hardening 12 Fluorine resin outer frame 13 Ultraviolet transparent glass plate 14 Resin thickness before hardening 15 Resin diameter before hardening 16 Resin thickness after hardening 17 Resin diameter after hardening 16 Resin surface after hardening 19 Measuring instrument Body

Claims (3)

It is a device that measures the curing shrinkage of the adhesive. Place a UV curable resin on a glass plate that transmits UV light, and install a laser sensor that measures the distance in a non-contact manner on the glass plate. Is a resin curing shrinkage measuring device that can measure the shrinkage state by measuring the distance between the surface and the bottom and the surface area. The outer frame for the cured resin provided on the glass plate is made of a resin that is difficult to adhere, such as fluororesin, and it adheres to the outer frame when the resin is cured and is free from deformation that is the opposite of shrinkage. The resin curing shrinkage measuring apparatus according to claim 1, wherein the volume of the cured resin can be measured in the state. The laser sensor that measures from the top measures the surface of the glass plate and the inside of the outer frame, calculates the measured volume of the resin surface in an uncured state after charging the resin, and after curing the resin surface area and thickness The resin curing shrinkage measuring apparatus according to claim 1, wherein the resin volume after curing is calculated by measuring the volume before and after curing so that the volume before and after curing can be digitized.

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