JPH0227995Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a backing material used for single-sided welding of various structures.

(Prior Art) Generally, when constructing structures by welding in shipbuilding, architecture, bridge construction, etc., double-sided welding is often impossible. For this reason or to save time in the welding process, single-sided welding is widely practiced. In this single-sided welding, a backing material is used to form a uranami bead, but as a simple single-sided welding backing material,
Lightweight, short solid backing materials are often used.

The present invention relates to an improvement of a solid backing material in which tile-shaped solid materials are continuously arranged in the longitudinal direction and adhered to a tape. Since this backing material has flexibility in the longitudinal direction as a whole, it has the advantage that it can be applied even to curved surfaces to be welded.

For example, as a conventional backing material of this type,
The one disclosed in Publication No. 22680 is known.
This conventional backing material is made by pasting ceramic tiles continuously in the center longitudinal direction of a wide adhesive tape.
In addition, release tape is pasted on the tape part other than the tile part, and when using it, the release tape on the backing material is removed to expose the adhesive, and then the tile is attached to the groove line of the material to be welded. The backing material is attached to the back side of the groove of the material to be welded by aligning the rows and pressing the adhesive tape portions on both sides of the tile rows onto the material to be welded. In this manner, the backing material is attached to the material to be welded, welding is then performed, and the backing material is removed from the material to be welded after welding is completed.

(Problem to be solved by the invention) In such an attached backing material, when the backing material is removed, the tile rows that are affixed to the adhesive tape and should maintain their integrity lose their integrity;
Each tile falls apart and is scattered on the floor. This is because the adhesive strength of the adhesive tape on the tile part decreases due to the high heat during welding, and when the backing material is removed from the material to be welded, the tile can no longer be stuck to the adhesive tape, that is, the tile row is integrated. This is because they become unable to maintain their sexuality.

In order to maintain the integrity of the tile rows even after welding is completed, it is possible to integrate the tile rows by, for example, providing a through hole in the tile and passing a string through the hole, but this is a preferable solution because it requires processing of the tiles, labor, etc. isn't it.

The present invention eliminates these drawbacks of the conventional technology,
To provide a backing material for single-sided welding that can sufficiently maintain the integrity of a row of backing tiles even after welding and is easy to manufacture.

(Efforts and actions required to solve the problem) The gist of the present invention to achieve this purpose is to continuously attach a plurality of backing tiles to the A backing tile band integrated with the first heat-resistant tape is attached to the central longitudinal direction of the second heat-resistant tape for attaching the backing material.

The present invention will be described below with reference to specific examples shown in the drawings, but the following specific examples do not limit the present invention, and various modifications can be made without departing from the gist of the present invention.

FIG. 1a is an overall upper perspective view of a specific example of the present invention;
Figure b is a sectional view, and figure c is a diagram of the device in use. In the figure, reference numeral 1 denotes a backing tile made of ceramic heat-resistant solid material, which has a rectangular cross section and has a slug pocket in the center longitudinal direction of its upper surface (the surface in contact with the groove). Reference numeral 2 denotes a first heat-resistant tape made of AI foil, for example, and the backing tiles are continuously arranged on the heat-resistant tape 2 and pasted so as to wrap around the upper surface of the backing tiles except for the center longitudinal direction. That is, the backing tile band is formed by pasting the lower surface, both side surfaces, and both ends of the upper surface in the longitudinal direction of the backing tile 1 to the first heat-resistant tape 2 via the adhesive 5.

3 is a second heat-resistant tape for attaching this backing tile strip to the groove of the material to be welded. It's a tape. The heat-resistant tape 3
Paste the backing tile strip in the longitudinal direction of the center of the
Release tape 4 is pasted on both sides in the longitudinal direction to protect the pressure sensitive adhesive.

When using the backing material of this invention,
As shown in the usage diagram of FIG. 1c, peel off the release tape 4 attached to both ends of the second heat-resistant tape 3 of the backing material in the longitudinal direction to expose the adhesive.
Align the backing tile 1 with the groove 7 of the materials to be welded 8, 8, and apply the second heat-resistant tape 3 on both sides of the heat-resistant tile 1.
Press it against the material to be welded and attach the backing material. The backing material is attached in this way, welding is then carried out, and the backing material is removed after welding is completed, but at this point the tile 1 is still attached to the first heat-resistant tape 2, and the integrity is still maintained. It forms a backing tile band having a backing tile band. This is because both side surfaces of the backing tile 1 do not reach as high a temperature as the bottom surface, so the adhesive strength of the first heat-resistant tape 2 on both side surfaces does not decrease so much, and even after welding, both side surfaces of the backing tile This is because it is attached to the first heat-resistant tape 2. In addition, the backing tile 1 may crack irregularly due to welding heat, but even in this case, the backing tile band of the present invention has both sides of the backing tile 1, including the bottom, covered with the first heat-resistant tape 2. Since it is pasted and integrated in a wrapping manner, there will be no inconvenience such as the pieces falling apart onto the backing tile.

Note that the type of adhesive 5 of the first heat-resistant tape 2 forming the backing tile band is not particularly limited. For example, a pressure-sensitive adhesive (rubber-based, acrylic-based, etc.) may be used in the same way as the adhesive for the second heat-resistant tape 3, or a heat-resistant adhesive may be used to maintain adhesive strength on the lower surface of the backing tile 1. agents (thermosetting resin adhesives, composite adhesives, polyaromatic adhesives,
Semi-inorganic polymer metalloxane, inorganic ceramic adhesive, etc.) may also be applied.

Figures 2a and 2b show other specific examples of the present invention. FIG. 2a shows an example in which the cross-sectional shape of the backing tile 11 is an inverted trapezoid, and FIG. 2b shows an example in which the inorganic fibers 9 are arranged on the upper surface of the backing tile 1.

(Effects of the invention) As described above, according to the backing material for single-sided welding of the present invention, the integrity of the row of backing tiles can be sufficiently maintained even after welding is completed, so that each tile falls individually as in the conventional method. It is expected that the welding material will not be scattered on the floor, which will greatly improve workability after welding, and that it will be easier to manufacture.

[Brief explanation of the drawing]

FIGS. 1a and 1b are an overall upper perspective view and a cross-sectional view showing a specific example of the present invention, and FIG. 1c is a usage state diagram.
FIGS. 2a and 2b are cross-sectional views showing other specific examples of the present invention. 1...Backing tile, 2...First heat-resistant tape,
3...Second heat-resistant tape.

Claims (1)

[Scope of utility model registration request] A plurality of backing tiles are continuously attached to a first heat-resistant tape except in the longitudinal direction of the top center of the backing tile, and a backing tile band is integrated with the second heat-resistant tape for attaching the backing material. A backing material for single-sided welding that is attached in the longitudinal direction of the center.