JPH0340791B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a spacer for double glazing.

[Conventional technology]

Double glazing or double glazing, as shown in FIG. 10, has two sheets of glass 1 spaced apart from each other at a constant distance, their peripheries sealed, and dry air sealed in the interior space 2, which has a great heat insulating effect. A hollow spacer 3 is used to maintain a constant distance between the glass plates 1.
A small hole or discontinuous slit 4 is formed in the wall surface of the spacer 3 facing the space 2, and a desiccant 5 is filled in the hollow part of the spacer 3. This is to remove moisture from the atmosphere that has entered the space during the manufacture of double glazing.
If moisture is present in the space 2, condensation will occur due to the temperature difference between the inside and outside, causing the glass surface to fog up. As described above, the small holes or discontinuous slits 4 need to allow air to pass through, but on the other hand, if the desiccant 5 in the hollow portion leaks into the space 2, the translucency of the glass 1 will be reduced. The small holes or discontinuous slits 4 are therefore made smaller in size than the minimum particle size of the desiccant. Note that 6 is a sealing agent such as thiocol for connecting the two glasses 1 and the spacer 3 in a sealed manner. The reason why the spacer 3 has a convex cross section as shown in FIG. 8 is to increase the sealing area.

To describe a typical manufacturing method of the spacer 3 that has been used conventionally, as shown in Fig. 9, a metal plate with a large number of holes 4 drilled in advance is roll-formed and formed into a discontinuous convex shape. The outer or sealed free end is then seam welded to form a fully convex shape.

The manufacturing method shown in Fig. 10 relies on roll forming like the manufacturing method shown in Fig. 9, but the free ends are arranged on the inside, that is, on the space 2 side, and a constant continuous gap is formed between the free ends without welding. The discontinuous slit 4A is constructed by leaving the slit 4A.

[Problem that the invention seeks to solve]

Of the above two manufacturing methods, the former (Fig. 9) requires a large number of molds for roll forming, cannot accommodate diversification of product dimensions, and also requires small holes pre-drilled in the metal plate. The continuous slit 4 may collapse during roll forming. The latter (10th
In the case of FIG. 3, the cross section of the spacer 3 is not continuous, so its rigidity is low, and it is easily deformed before and after assembly. Therefore, the distance between the continuous slits 4A increases and the desiccant 5
There was a drawback that the water leaked into the space 2.

[Means for solving problems]

In view of the above-mentioned drawbacks of the conventional manufacturing method, the present invention reduces the number of steps required for roll forming processing, forms ventilation openings such as small holes or discontinuous slits in a long plate-like member, and also reduces the number of steps required for roll forming. The spacer body, which previously required forming processing, is made of synthetic resin, etc., and the two are combined to create a long metal plate-like member with air flow openings consisting of discontinuous small holes or slits. While moving through an extrusion die, a molten synthetic resin to form a spacer is continuously supplied into the die and injected near both edges of the plate-shaped member moving within the die, and the plate-shaped member is moved through the extrusion die. This is a method for manufacturing a spacer for double-glazed glass, in which a member and a synthetic resin are connected to each other, a desiccant storage space is formed between the two, and the space is filled with a desiccant.

〔Example〕

As shown in Figs.
The elongated metal plate-like member 7 with the formed shape is moved through an extrusion die (Fig. 2), and the molten synthetic resin is extruded near both free ends of the plate-like member 7 moving inside the die. Composite extrusion is performed to form the spacer. In this case, if both free ends of the plate member 7 are bent into a key shape as shown in FIGS. 2 and 4, the bondability between the plate member and the synthetic resin will be improved.

Next, an example of forming the air flow opening 4 in the plate member 7 will be described. In FIG. 5, round or non-round through holes are formed by continuous punching or the like. Figure 6 shows a plate member 7 that is cut in its width direction and extruded sideways to form extruded portions 10 to form slit-shaped ventilation openings 4, which can be easily formed by roll forming. can do. Although slits are formed on both sides of the extruded portion 10, they may be formed only on one side. FIG. 7 differs from FIG. 6 in that a cut is made along the axial direction of the plate member 7. Figures 6 and 7
In the embodiment shown, narrow slits can be formed precisely.

〔Effect of the invention〕

As explained above, according to the present invention, the plate-like member provided with the air flow port and the spacer body are integrated by separate bonding or composite extrusion. The flow port will not collapse during processing. Furthermore, since the slits constituting the air flow openings are not continuous but discontinuous, there is no possibility that the interval between the slits will increase and cause a problem.
Therefore, it has many effects such as obtaining a spacer with high rigidity.

[Brief explanation of drawings]

1 to 4 are cross-sectional views of embodiments of the present invention,
5 to 7 are perspective views showing embodiments of the plate-like member used in the present invention, FIG. 8 is a cross-sectional view showing the main parts of conventional double-glazed glass, and FIGS. 9 and 10 are conventional FIG. 3 is a cross-sectional view showing a spacer manufacturing method. 3... Spacer, 4... Air circulation opening, 5...
Desiccant, 7... plate member, 8... spacer body.

Claims (1)

[Claims] 1. A long metal plate-like member having an air flow opening consisting of discontinuous small holes or slits is moved through an extrusion die, while a molten synthetic resin to form a spacer is moved through an extrusion die. The desiccant is continuously supplied into the die and injected near both ends of the plate-like member moving within the die, thereby connecting the plate-like member and the synthetic resin to each other and creating a desiccant storage space between them. A method for producing a spacer for double-glazed glass, which comprises forming a spacer and filling the space with a desiccant. 2. The method of manufacturing a spacer according to claim 1, wherein the air flow opening is formed by cutting and extruding the plate member.