JPS60255636A - Method of forming glassware - Google Patents

Abstract

PURPOSE:A perforated glass plate is put on a table which has molding holes of a larger diameter than the perforations, softened by heating, then a weight for molding is allowed to come down to press the peripheries of the perforations whereby a glass article with a collar around the opening can be readily formed. CONSTITUTION:Prescribed holes 2 are bored on a glass plate 1. Meanwhile, a table D which has molding holes E of a larger diameter than the holes 2 (R means the round periphery on the shoulder; C are legs) is placed in a furnance A (B means heater). Then, the glass plate 1 is placed on the table D so that the holes 2 are overlapped on the molding holes E and softened by heating. Weights for molding F are allowed to come down by their own weight into the holes 2 to deform the peripheries of the holes 2 along the inner surfaces of the molding holes E. Then, the product is gradually cooled down to give an ornamental glass ware which has collared holes (3) and can be used as, e.g., a louver for illumination.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of molding a decorative glass body such as a lighting louver.

(Prior Art) Conventionally, this type of glass body has been formed by pouring molten glass into a mold. However, this method does not require expensive molds, tends to produce air bubbles in the molded glass body, and requires complicated post-processing such as deburring, resulting in poor productivity and not being able to be manufactured at a low cost. . We also tried a method of processing plate glass, but this resulted in cracks or poor molding, making it impossible to produce anything with commercial value.

(Problems to be Solved by the Invention) Therefore, the present invention solves the above-mentioned drawbacks or problems, and provides a product with constant quality quickly and at a low cost by manufacturing a glass body through a simple process. The aim is to obtain a molding method that can do this.

(Means for Solving the Problem) As a means for solving this problem, the present invention provides a method for forming a hole in a glass plate, and then placing the hole in the glass plate on a support base in which a hole having a diameter larger than that of the chain hole is formed. Align it with the molding hole and place it, heat it to soften the glass plate, then lower the molding loader over the plate stop of the glass plate, squeeze out the hole along the molding hole, and tighten the hole in the chain hole. This method employs a method of forming a molded flange around the periphery to mold the glass body.

(Example) A specific method of the present invention will be described in detail below with regard to an example shown in the drawings.

First, as shown in FIG. 1, holes (2) are suitably bored in a plate glass (1) with a diameter of 3 m+ or more and about 1'0 cm, preferably 5 IWI 8 degrees. This hole (2) is not particularly limited, but is preferably a circular hole. Next, this plate glass (1) is placed in a heating furnace (A) such as an electric furnace, as shown in FIG. This heating furnace (2) is equipped with a heat source 0 and a support stand [F] erected on the legs (O).The support stand has a heat resistance temperature of 1000
It is made of carbon graphite or the like with a temperature higher than 100°C, and has a molded hole (G) with a larger diameter than the hole (2) of the glass plate (1), and its upper periphery is formed into an arcuate shape. 7 Also, hang a molding load from above inside the heating furnace (2).

I'll leave it there. This molding loader [F] has a heat resistance temperature of 1000°
It is made of carbon graphite of C or higher, and its weight is 1 when the forming hole is 10 clrL and the thickness of the plate glass is 5 cm.
00-200g, the tip is formed into a spherical shape. And the hole (2) of the plate glass (1) is the molding hole [F] of the support base ■.
After placing the glass plate (1) on the support base so as to match the temperature, the heating furnace (2) is heated to 800° C. for about 3 hours to soften the glass plate (1). Next, as shown in FIG. 3, the molding loader (G) is lowered into the hole (2) under natural load. As a result, the hole (2) is squeezed out downward along the forming hole [F] of the support gold mine to form the forming collar (3), and the forming loader [F] penetrates the hole (2). and falls below the support stand as shown in Figure 4. Then, I turned off the heat source and left it in that state for about 15 hours to cool down for 4 hours.
2) Take out the glass plate (1) and make the hole (2) as shown in Figure 5.
) can be obtained with a molded flange (3) formed thereon, such as a decorative louver for a lighting fixture such as a ceiling.

Incidentally, during the above-mentioned molding, a holding plate made of asbestos or the like may be placed on the glass plate (1). Also molded tsuba (3
) is not limited to a cylindrical shape, but may also be a flower-shaped molded collar (4) with several arcuate surfaces (4a) formed on the outer peripheral surface as shown in FIG. In this case, a molding loader [F] and a molding surface of the molding hole (2) of the support base (2) may each be formed with several arcuate surfaces. Furthermore, as shown in Fig. 7, it is also possible to form a molded collar (51K) with an inward edge (5a) at the tip. In this case, the molding loader [F] is connected to the hole (2).
All you have to do is make it descend so that it does not penetrate.

(Effects of the Invention) As described above in detail with respect to the embodiments, according to the forming method of the present invention, the holes are squeezed out by the falling load due to the weight of the forming loader without applying excessive force to the formed sheet glass. Therefore, it is possible to obtain a molded tsuba of stable quality without cracking, cracking, or distortion. In addition, unlike pouring molten glass, it does not produce air bubbles and has excellent transparency, and when used in decorative objects such as lighting equipment, it can produce beautiful products with extremely high shine. Furthermore, since it does not produce flakes, it has various excellent effects such as being able to save time in post-processing, being able to be manufactured efficiently and at low cost.

[Brief explanation of drawings]

Figures 1 to 4 show the manufacturing process of the present invention. Figure 1 is a perspective view of a plate glass before heating, Figure 2 is a cross-sectional view of a heating furnace before heating, and Figure 3 is a view of the glass sheet during forming. Figure 4 is a cross-sectional view of the heating furnace after molding, Figure 5 is a rear perspective view of the finished product,
FIGS. 6 and 7 show rear perspective views of finished products of other embodiments. (1)...plate glass, (2)...hole, (3)...
Molded tsuba, (2)...Heating furnace, ■...Support stand, (G)
... Molding hole, (g)...; Load element for molding. Patent Applicant Representative Patent Attorney Miyuki Fujiki Figure 1 Figure 2 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] A hole is made in the glass plate, and then the glass plate is placed on a support stand with a formed hole larger in diameter than the chain hole, with the hole in the glass plate aligned with the formed hole, and heated to soften the glass plate. After that, lower the molding loader over the plate stop of the glass plate and insert the molding hole into the molding hole.
A method for forming a glass body by squeezing out a hole and forming a molding flange around the chain hole I/#.