JPS62100437A - Production of glass vessel having side face and bottom face - Google Patents

Abstract

PURPOSE:To obtain the titled glass vessel of a complicated shape by rotating a hermetic vessel contg. a sol along an optional axis passing through the vessel, gelating the sol while revolving the vessel along another axis, and then drying and sintering the gel. CONSTITUTION:The sol obtained by hydrolyzing an alkyl silicate with an acid is charged in the hermetic vessel, the vessel is rotated along an optional axis passing through the vessel, and the sol is gelated while revolving the vessel along another axis. The obtained gel is dried, sintered, and vitrified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing glass containers by a sol-gel method.

[Summary of the invention]

The present invention is a glass manufacturing method using the sol-gel method, in which a sol is placed in a hermetically sealed container, an arbitrary axis passing through the container is selected and rotated, and the sol is rotated along another axis. By drying and sintering the gel thus prepared, a glass container can be obtained relatively easily.

[Conventional technology]

Glass production using the sol-gel method allows sintering at low temperatures, and silica glass can be produced at low cost. Orui has various advantages, including the ability to create glasses with new compositions.

[Problem that the invention seeks to solve]

However, in the conventional sol-gel method, gelation progresses throughout the entire tubular body other than the method of fabricating the entire tubular body by adding rotation, so this method is commonly used in the field of glass. However, the method of pouring molten glass into a mold and then pulling out the molten part after it solidifies around the mold to obtain a glass container a that conforms to the shape cannot be used, so a glass container is obtained. It is difficult to understand.

[Problems to be solved by the invention and LI aspects] Therefore, the present invention is intended to solve these problems, and its purpose is to provide a means for producing glass containers with relatively simple operations. It's there to provide.

[Means to solve all problems]

The method of using the glass container having the side and bottom surfaces of the present invention is as follows:
In a glass manufacturing method using the sol-gel method, the sol is placed in a completely airtight container and rotated by selecting an arbitrary axis that passes through the container, and gelling while rotating along that axis and another axis. By drying and sintering the gel, the sides and bottom of the glass container are completely covered.
Features.

The viscosity of the gelled i+lfJ sol increases by 1 or more, and by applying a slight rotation, the sol adheres to the inside of the rotating container due to sliding friction with the wall surface of the rotating container. In addition, even when the viscosity is low, as the rotation speed increases, centrifugal force causes
It is pressed against the inner surface of the rotating container. Utilizing this characteristic, when the rotating shaft is fully rotated in the trough, HJ, and rotated, a shape with side surfaces can be produced by means such as the 3F shown in FIG. Furthermore, as shown in FIG. 2, if another axis is added to this 111I and rotated, a shape having side surfaces and a bottom surface is produced. So let the sol gel while adding gold to the sides and bottom? A gel having the following properties is prepared.

By completely drying and sintering the obtained gel, a glass container having side surfaces and a bottom surface can be easily obtained.

〔Example〕

The details of the invention will be described in Examples.

Example - Ethyl silicate 5i (00,H,) 4.208 Of
, CLO2N hydrochloric acid% 1470F, fine powder silica 600
The mixture was mixed for 9 f and stirred for 9 hours to complete the hydrolysis and create a sol. Gold% Q
After adjusting the PHa2 using 2N ammonia water and filtration, the mixture was poured into a cylindrical container with a size of 324 mm and 201 mm in diameter x 50 mm. As shown in Figure 3, a full rotation of Nlrpm was achieved along the axis of the cylinder.

Further, the center of rotation was set at a location 5Oc1n away from the bottom surface of the cylinder on the rotation axis, and rotation was performed at 1 N rpm.

N in table 1,,N! indicates the value of

It gelated after about 10 minutes, and after further rotation for 2 hours,
After stopping the rotation and aging for 2 days, drying was performed at 40° C. for 4 weeks to obtain a dry gel. Obtained dry gel′
Heat to t-1250℃ to finish sintering and %10tM
A transparent silica glass container with a thickness of about 5.0+ex (φ x 25 m) was obtained. Table 1 shows all the shapes of the products for each rotation speed.

Table 1 From the results in Table 1, if there is too much disparity between the centrifugal force applied to the side surface and the centrifugal force applied to the bottom surface, L7 or sol will be applied only on the side with a faster rotation rate, as shown in Comparative Example 1.2. There wasn't. Furthermore, from Comparative Example 5, when the number of revolutions was low in the koshikage, no shape was formed.

Example-2 Ethyl silicate 512W, 102N hydrochloric acid 2221 and 90tf of fine powder silica were mixed and stirred vigorously to complete hydrolysis and a sol was prepared. The sol was centrifuged, adjusted to pH 5.2 using 11N ammonia water, and passed through N'1. It was molded into a beaker powder with a diameter of 24.0 FM, poured into a container, and rotated at a rotational speed of 46 Orpm (approximately 20 G
) while rotating at a rotation speed of 1 to 4 rp+n (20G) with the center of rotation on the axis at 1 zero from the maximum diameter (20 G).

After that, after rotating for 2 hours, the entire rotation was completed.
I made a deposit two days ago. Next, dry the gel at 40°C for 4 weeks to obtain a dry gel. The obtained dry gel was heated to 1250°C.
Heat until 1-1. Large diameter resistant? OPJφ, minimum diameter 80 holesφ
, the transparent silica for the 50 logo with a height of 120 cm has a rough V-B-force, and if you attach it to the fi-mori-i-aki, it will be transferred! A bead with 1゛τ11 thickness, the force is ↓ * = surface Iri is as smooth as possible for use without polishing, and it is □chilled.

Example-5 Ethylsilicate 5j2f, α02N hydrochloric acid 222
f' and finely powdered silica 902 were mixed [7. This sol total centrifugal f disaster 1. After that, the pH was adjusted to 5.2 using α2N ammonia water, and then the pH was adjusted to 5.2.
The 1201al was poured into a mold for a flask with a spherical shape of 10 mm and a cylinder of 400 mm x 10 necks, and as shown in Figure 5, while applying rotation at 700 rpm G along the axis of the cylinder, Rotate 4 to make a 50° angle with that axis
The rotation center was set at 4501M from the center of the sphere, and 11 rotations were performed at 225 rpm to charge the gel. 71]
After aging for a while, drying was performed at 60° C. for 3 weeks to obtain a dry gel. The obtained dry gel was heated to 1250°C [7 to complete the sintering, and the upper part was 2 crnφ and the length was 10 cr.
A transparent silica glass flask of n was obtained.

In this embodiment, only silica glass is described, but it is clear that the same method can be applied to a mixture of other components such as glass 6 and alumina.

〔Effect of the invention〕

The method for manufacturing a glass container having a side surface and a bottom surface according to the present invention includes:
As mentioned above, since the sol-gel method is used, the shape of the container surface during gelation is directly transferred.

Therefore, it is possible to manufacture complex shapes without processing, and it is possible to manufacture containers with scale marks, etc. Furthermore, it provides a means for supplying alumina at low cost, such as in containers.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the means for producing a shape with a side surface;
The figure is a complete explanatory diagram of the means for producing a shape with side and bottom surfaces, FIG. 5 is a schematic diagram of rotation in Example 1, FIG. 4 is a schematic diagram of rotation in Example 2, and FIG. 5 is a schematic diagram of rotation in Example 2. FIG. 5 is a schematic illustration of rotation in Example 5; Side 'iii included TA3 7E 7 year old five sweat role - Explanation diagram Figure 1 4'lii 4@hcq wealth 3-i5-tittT' 1
3 hands '21d' Mouth diagram' Fig. 2 Proboscis turtle example 1 ml decoration 4 milk products, 2 CΦ h゛ut 飄 1st middle knee 7 ＾kan y key 4th 5th

Claims (1)

[Claims] In the sol-gel glass manufacturing method, the sol is placed in a sealable container, an arbitrary axis passing through the container is selected,
A glass having side and bottom surfaces characterized in that it is rotated and gelled while being rotated along its axis and another axis, and that the created gel is turned into transparent glass by drying and sintering. Method of manufacturing containers.