JPH0581237U - Ring mold for strengthening flat glass - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a ring mold capable of suppressing the generation of perspective distortion and reflection distortion when forming a sheet glass. [Structure] The ring mold 1 is formed by penetrating a cooling air introduction hole 2 in the thickness direction. A plurality of the introduction holes 2 are provided in the width direction of the ring mold 1, and the upper surface opening 2a facing the lower surface of the plate glass G has a small diameter and the lower surface opening 2b has a large diameter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ring mold used in a place where sheet glass is simultaneously formed and strengthened.

[0002]

[Prior Art]

 A ring mold has been conventionally used to support the periphery of the sheet glass when press-forming the sheet glass between the upper die and the lower die and when the sheet glass is blown with cooling air to quench and strengthen.

Japanese Utility Model Publication No. 62-157939 discloses a ring mold as shown in FIG. The ring mold 10 has a comb-teeth shape, a cooling air introduction hole 11 is formed in a thin portion, the whole is covered with a wire net 12, and the wire net 12 prevents the wire mesh 12 from rising.

Japanese Utility Model Publication No. 63-21541 discloses a ring mold as shown in FIG. This ring mold 20 has an upper surface as an inclined surface 21, a lateral hole 22 is formed in the width direction, and an exhaust hole 23 having an upper end opening to the inclined surface 21 is connected to the lateral hole 22, and the inclined surface is the same as described above. It is covered with a wire net 24.

[0005]

[Problems to be solved by the device]

 In the ring mold 10 disclosed in Japanese Utility Model Laid-Open No. 62-157939, the wire net 12 conforms to the comb-tooth shape over time, and the comb-tooth shape is transferred to the plate glass G at the time of molding, which causes reflection distortion and perspective distortion. Becomes worse.

In addition, in the ring mold 20 disclosed in Japanese Utility Model Publication No. 63-21541, since the width t of the ring mold is narrow, the lower surface of the plate glass G is supported by the point of the ring mold, and the mold mark remains. Even if the exhaust holes 23 are formed, the exhaust holes 23 do not penetrate in the vertical direction, so that cooling air cannot be introduced, and as a result, strengthening of the peripheral portion may be insufficient.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention makes the ring mold a flat plate shape and further has a plurality of cooling air introduction holes penetrating in the thickness direction in the width direction.

[0008]

[Action]

 The entire ring mold is tilted and set, and the peripheral edge of the plate glass is supported on the upper surface of this ring mold, and bending and quenching are strengthened in this state. As the bending progresses, the peripheral edge of the plate glass comes into full contact with the upper surface of the ring mold.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a sectional view of the ring mold according to the present invention, FIG. 2 is a perspective view of the ring mold, FIG. 3 is a plan view of the ring mold, and FIG. 4 is a sectional view taken along the line AA of FIG.

The ring mold 1 has a flat plate shape, and its entire shape is an annular shape along the peripheral shape of the plate glass G, and is attached to a support member (not shown) so that its upper surface is inclined.

Further, the ring mold 1 is formed so as to penetrate the cooling air introduction hole 2 in the thickness direction. A plurality of the introduction holes 2 are provided in the width direction of the ring mold 1 (three in a row in the embodiment), and the upper surface opening 2a facing the lower surface of the plate glass G has a small diameter and the lower surface opening 2b has a large diameter. It is in the shape of. By making the upper surface opening 2a smaller in this way, hole traces are less likely to be transferred to the plate glass G, and by making the lower surface opening 2b large, cooling air can be taken in effectively and the peripheral edge of the plate glass G can be made. Can be fully strengthened.

Further, the upper surface of the ring mold 1 is covered with a woven cloth 3 made of metal fibers, and the woven cloth 3 is stopped by a wire 4. Here, as the woven cloth 3, for example, a mesh having a mesh of about 15 to 17 woven of metal fibers obtained by twisting several stainless wires having a diameter of about 0.2 mm is used. A wire mesh or punching metal may be used instead of the woven fabric 3.

In the above, the peripheral edge of the plate glass G is placed on the upper surface of the ring mold 1 as shown in FIG. 1, the peripheral edge of the plate glass G is molded, and cooling air is taken in through the inlet 2, Strengthen the department.

FIG. 5 is a perspective view of a ring mold according to another embodiment, and FIG. 6 is a view showing a usage state of the ring mold shown in FIG. 5. In this embodiment, an upper surface of a rod-shaped ring mold 1 is shown. 1a is a flat surface, the edge portion 1b of this upper surface is chamfered to have a rounded shape, and the lower surface 1c is bulged downward.

Further, similarly to the above, the ring mold 1 is formed so as to penetrate through the cooling air introduction hole 2 having a tapered shape in the thickness direction, and the upper surface of the ring mold 1 is covered with the woven cloth 3 made of metal fibers. The end portion of the woven cloth 3 is folded back twice, and a wire 4 is passed through this portion to pull it down and stop. Here, since the edge portion 1b and the lower surface 1c of the ring mold 1 are rounded or bulged downward, the wire 4 does not bend and can be tightly tightened and loosened over time. There is no.

FIG. 7 is a diagram showing another embodiment. In this embodiment, the ring mold 1 has a triangular cross-sectional shape, and each vertex of the triangle is rounded.

[0017]

[Effect of the device]

 The following (Table) is for the case where the ring mold according to the first embodiment shown in FIGS. 1 to 4 and the ring mold according to the second embodiment shown in FIGS. 5 and 6 is used and the conventional ring mold is used. It is a comparison of the see-through properties of the sheet glass after the molding and strengthening in the case of the presence. Here, the transparency is set so that the plate glass is set orthogonally to the observer, and while gradually rotating the plate glass from this state, observe the landscape through the edge of the plate glass, and rotate when the transparency deteriorates. Compared by angle.

[0018]

[Table 1]

As is apparent from the above description and (Table), according to the present invention, the ring mold has a flat plate shape, and a plurality of introduction holes are formed in the width direction of the plate ring mold. Therefore, the opening area of one introduction hole can be reduced, and at the beginning of molding, the peripheral edge of the plate glass hits the upper surface of the continuous plate-shaped ring mold, resulting in comb-shaped distortion and the mark of the ring mold apex. There is no sticking.

Further, since the cooling air introduction hole is formed in the thickness direction, the peripheral portion of the plate glass can be sufficiently strengthened. In particular, the shape of the introduction hole has a small upper surface opening and a large lower surface opening. The tapered shape makes it easy to take in cooling air and prevent transfer of the ring mold.

In addition, when the edge portion of the flat upper surface of the ring mold is rounded, the upper surface is covered with a surface covering material such as metal woven cloth, and when the upper surface is pulled by a wire or the like and pressed against the upper surface, It is possible to prevent the surface coating material from floating. In particular, the effect is further exerted by projecting the lower surface shape of the ring mold downward.

[Brief description of drawings]

FIG. 1 is a sectional view of a ring mold according to the present invention.

FIG. 2 is a perspective view of the ring mold.

FIG. 3 is a plan view of the ring mold.

FIG. 4 is a sectional view taken along line AA of FIG.

FIG. 5 is a perspective view of a ring mold according to another embodiment.

FIG. 6 is a view showing a usage state of the ring mold shown in FIG.

FIG. 7 is a sectional view of a ring mold according to another embodiment.

FIG. 8 is a view showing a conventional ring mold.

FIG. 9 is a view showing a conventional ring mold.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ring mold, 2 ... Cooling air introduction hole, 2a ... Introducing hole upper surface opening, 2b ... Introducing hole lower surface opening, 3 ... Metal woven cloth, G ... Plate glass.

Claims (4)

[Scope of utility model registration request] 1. A ring mold for supporting bending of a plate glass and quenching and strengthening the plate glass at the same time by supporting a peripheral portion of a lower surface of the plate glass heated to near a softening point, the ring mold having a flat plate shape and a thickness direction. A ring mold for strengthening the molding of plate glass, characterized in that a plurality of cooling air introduction holes penetrating therethrough are formed in the width direction. 2. The ring mold for strengthening molding of sheet glass according to claim 1, wherein the introduction hole has a tapered shape with an upper surface opening having a small diameter and a lower surface opening having a large diameter. 3. A ring mold for simultaneously bending and tempering a sheet glass by supporting a lower edge portion of the sheet glass heated to near the softening point, the ring mold having a rounded edge on a flat upper surface. Reinforcement of sheet glass characterized by holding it, covering its upper surface with a surface covering material such as woven cloth made of metal mesh or metal fiber, and further pulling the surface covering material with wire such as wire wound around the lower surface of the ring mold Ring mold. 4. The ring mold for molding and strengthening plate glass according to claim 3, wherein a lower surface of the ring mold has a shape protruding downward.