JPS58175656A - Manufacture of curved-surface mirror - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a curved mirror that is used as a full back-up material using a curable resin plate.

2. Description of the Related Art Conventionally, curved mirrors have been provided in which a resin plate such as FRP (glass fiber reinforced resin) is used as a back-up material, and the entire thin plate mirror is attached to the surface of the back-up material.

Methods for manufacturing such curved mirrors include the dry forced bending adhesive method and the wet adsorption method. The dry forced bending adhesive method involves sandwiching a honeycomb structure or the like between two already hardened FRP plates. In this state, they are curved and integrated using a mold using adhesive, and a thin plate mirror is pasted on the surface of this integrated back-up material.Also, the wet adsorption method is connected to a vacuum pump. A laminate consisting of a thin mirror and uncured PR, P plates, etc. is placed on a mold with many suction holes, and this laminate is bent by applying a vacuum to the surface of the mold. be.

However, when using the dry forced bending adhesive method, the already hardened PR or P plate is forcibly bent, so there is a risk of large residual stress and deformation over time. I try to keep it, so
It will peel off from the defective adhesion area. Furthermore, since the number of processing steps is large, there are disadvantages such as increased costs. In addition, when using the wet adsorption method, it is technically difficult to fully vacuum the entire curved surface of the laminate before adsorption, resulting in a yield problem. Since it must have a molding surface and be of a suction type, there are problems in that manufacturing is troublesome and this leads to an increase in the cost of the product.

The present inventor has devised the present invention in order to improve the drawbacks of the above-mentioned conventional examples.The purpose of the present invention is to provide a mold that does not deform later, has a good yield, and has a simple mold itself. An object of the present invention is to provide an entire method for manufacturing a curved mirror, which can result in cost reduction.

In order to achieve such an object, the present invention provides a laminate in which a mirror plate made of thin glass is stacked on the upper surface, lower surface, or both surfaces of a curable resin plate such as uncured FRP, and the upper and lower surfaces of the laminate are made of flexible plates. The gist is that the laminate is placed on a mold while being held in place by weights, and then the laminate is gradually curved to fit the mold using weights, etc., and then the resin plates such as F'R and P are cured.

An example of the implementation of the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 show a curved mirror manufacturing apparatus for carrying out the method of the present invention, and the manufacturing apparatus 1 includes a plate-shaped mold 2.2' whose upper end surface is entirely curved. il- parallel to each other, and the base ends of two bar members 3.3 are fully connected to the outside of these plate-shaped molds 2, 2 and at the center of their upper ends, and these bar members 3.3 The distal end of the cylinder unit 4 is fixed to the rond of the cylinder unit 4, which is installed on the lower side of the device 1. By driving the cylinder unit 4.4, the lever member 3.4 rotates in the vertical direction about its base end, which is a pivoting portion.

Also, as shown in Fig. 2, the left and right lever members 6 are
．． 3, as shown in FIG. 3, link members 5...
As shown in FIG. It is fixed at By fixing the center roller 6a to the plate-shaped mold in this way, the roller group 6... is fixed to the mold 2.
．． 2 to prevent positional deviation from occurring along the upper end surface.

A flexible plate 8 made of vinyl chloride, stainless steel, etc. is placed on the roller group 6, and this flexible plate 8f
f: As shown in FIG. 4, it is fixed to the center roller 6a with a screw 8a.

A method for manufacturing a curved mirror using the manufacturing apparatus 1 having the above configuration will be described.

First, in order to improve workability, the bar member 3 is brought into a completely horizontal state, and the flexible plate 8 is also brought into a horizontal state accordingly. Then, as shown in FIG. 5, a thin glass plate with a thickness of 1 cm or less, one side silvered and a protective layer provided thereon, is placed on a flexible plate 8 whose surface is coated with a mold release material if necessary. Mirror plate 9 consisting of
Place it with the silver side facing up. Further, an uncured FRP board 10 or an uncured curable resin board is placed on the mirror plate 9, and then a release material is applied to the bottom surface of the unhardened FRP board 1 on the metal 0 side as necessary. The flexible plates 11 provided with the coatings are stacked, and a plurality of block-shaped weights 12 are placed on the flexible plates 11. As shown in FIG. 6, on the manufacturing apparatus 1, a laminate 13 made by stacking uncured FRP plates 1, 0 and 9, is sandwiched between upper and lower surfaces by two flexible plates 8, 11. This means that it was placed in a soldered state.

Next, as shown in FIG. 7, by fully operating the cylinder unit 4, the lever member 6 is gradually swung downward. Then, the roller group 6 supported on the bar member 3 is sequentially transferred to the upper end of the curved mold 2, and the overall shape of the roller group 6 is changed to the shape of the upper end of the plate-shaped mold 2. That is, it becomes curved. As this movement progresses, the two flexible plates 8
, 11 is bent by the weight of the weights 12 .

Then, by leaving the uncured state at room temperature for a predetermined period of time or heating it, the FFtP board 10 which was in an uncured state is removed.
Completed all 10 moldings. Thereafter, as shown in FIG. 8, the formed laminate, that is, the FRP board 1 sheet metal 0 is used as a backup material, and the curved mirror 14 with the mirror plate 9 integrally provided on the surface of this bank-up material 10 is removed from the manufacturing apparatus 1. The end face of this curved mirror 14 is processed to produce a product.

Note that the above is only one example of implementing the present invention, and the present invention is not limited to the above. For example, as a curable resin, Fl'L
In addition to P, various resins can be used, and the structure of the curable resin plate is not limited to the solid one shown in the figure, but can also be one with a non-uniform structure inside, or one made of other materials. It may be sandwiched between curable resin plates such as Nicum core material iFR, P or the like.

As is clear from the above description, according to the present invention, after curve-forming a laminate in which a thin plate mirror is stacked on an uncured PR, P plate, etc., Therefore, it is possible to manufacture a curved mirror that is integrated with the pick-up material without using adhesives.Since the curved mirror is once formed and then hardened, no residual stress is generated in the curved mirror, and it does not deteriorate over time. It will not be deformed. Since it can be manufactured using the manufacturing equipment described in Section 2, first of all, the lamination work can be done on a horizontal surface, which improves work efficiency, and it also allows gradual bending without strain, which causes damage to thin mirrors. It has many advantages, such as not causing any problems, and making the mold itself easy, which is extremely advantageous for mass production of curved mirrors.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a front view of a curved mirror manufacturing apparatus for implementing the method according to the present invention, FIG. 2 is a side view of the manufacturing apparatus, and FIG. 3 is a side view of the same manufacturing apparatus. The figure is a front view of the roller group, Figure 4 is a side view of the center roller, Figure 5 is a front view similar to Figure 1 showing the state before molding, Figure 6 is an enlarged view of the laminate, and Figure 7. 1 is a front view similar to FIG. 1 showing the state after molding, and FIG. 8 is a side view of the curved mirror as a product. In the drawing, 8.16 is a flexible plate, 9 is a mirror plate, 10 is a resin plate, 16 is a laminate, and 14 is a curved mirror. Patent applicant: Nippon Sheet Glass Co., Ltd. Agent: Patent attorney Yoichi Shimoda Patent attorney: Kunihiko Ohashi Figure 1-3 (

Claims (1)

[Claims] The uncured curable resin plate was held approximately flat and stacked on a mirror plate made of thin glass to form a laminate, and then both sides of this laminate were held between flexible plates and bent gradually. A method for manufacturing a curved mirror, characterized in that the curable resin is then cured.