JPH05509372A - catalytic converter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] catalytic converter The present invention relates primarily to catalytic converters for automobiles.

Catalytic converters render exhaust gases from car engines harmless before they are released into the atmosphere. Used for processing. This treatment is a porous ceramic block whose pores are This is done by passing exhaust gas through a chamber containing a coating of a suitable catalyst. Ru.

The chamber containing the ceramic block is made by welding the ends of two half shells. , having an entrance and an exit. The block is wrapped by a fibrous material, and this fibrous material The converter is insulated from outside cold temperatures and the ceramic block protects against chamber expansion and friction. Acts as a buffer and sound dampening material (.

A commonly used fiber material is 95% alumina sold under the trade name 5AFFIL. It is a low density mat. Two fibrous material pads are used these days, one The converter block is placed in one half shell and the other is a converter block containing the first fiber material. When placed on top of the band, it is placed on top of the converter block. This method is It is unsatisfactory in several respects. First, the pads don't fit, and the catalyst converter block The point is that it may not protect the edges. Second, the fiber material is pre-cut Although the weight is adjusted within acceptable limits, the thickness of the resulting pad varies greatly. This is the point where it becomes a reality. This variation in thickness is a problem when catalytic converters are placed together. cause. In UK Patent Application Nos. 217118OA and 2205929A , there is a way to wrap the ceramic block and facilitate fitting of the catalytic converter. Proposed.

Although these methods are fine in many cases, multiple layers of plastic material When present between or around layers of material, they can be a source of contaminants for textile materials. May impair the effectiveness of textile materials.

It is an object of the present invention to provide a method of providing a fibrous material around a catalytic converter block, The purpose is to eliminate or alleviate the above disadvantages.

According to the invention, a fibrous material pad for a catalytic converter block is preferably sealed. It is installed inside the outer casing. By pulling opposite sides of the exterior, It is also preferable that the sheath reduces its thickness in some areas or parts. . Pulling the surfaces of the sheath together can be done in a variety of ways. for example , a plastic tag used to label clothing, etc. A thin flexible plastic zelkova with a T-bar at the end can be used. Such a tag is , inserted by a specially designed machine. Or hold the opposite side of the exterior with your hands. Or you can sew it by machine.

Tags or stitches can be placed in separate locations on the exterior in a desired pattern or randomly. can be used. Stitches or tucks should be on separate lines and cross each other. may be provided as one continuous line or in any known arrangement particularly desirable for manufacturing purposes. I can do it. Placement and spacing of tags or stitches depends on the size of the textile pad. Ru.

Textile materials by choosing the location of tags, stitches or tucks and their tension The thickness of the sheathing can be adjusted, including the initial padding of fiber material contained in the sheathing. The thickness can be within any desired range, regardless of the thickness of the material.

The sheath used in the invention is preferably made of plastic material and has an overlapping Suitable plastic heat-sealed or folded along the edges of the notebook Sealed by heat sealing the materials. The plastic material itself is strong enough ( , withstand insertion of tags or stitches, and will not tear, for example. In addition, plastic The stick material is air permeable and the fibrous material pad is used in the half-shelf of the catalytic converter. Can be bent to follow the shape of wells and/or blocks, tags and stitches This is preferable because it can be compressed by plastic fibers such as polypropylene fibers A nonwoven fabric made of is suitable for making the outer packaging in the present invention.

The invention will be explained below on the basis of examples. Figure 1 shows the fiber material in the exterior. Fig. 2 shows the pad of textile material in the exterior with the first stitch, Fig. 3 shows the pad A pad of textile material in the exterior with a second stitch, Figure 4 shows a third stitch. Figure 5 shows the pad of textile material in the sheath with tags. FIG. 6 shows a pad of textile material in the sheath with a fourth stitch.

Figure 1. According to It is enclosed in an outer device 0 made of nonwoven fabric made of fibers. 5AFFIL pad by heat knolling the overlapping ends of the fabric with 5 or 5 Heat-seal the edges of the folded textile notebook together around the AFF IL pad. The exterior is created by rolling. Heat-sole joint is shown as 12 .

Such a sheathed pad is placed in a catalytic converter on one side of the catalytic converter block. used for protection and sound reduction.

In FIG. 2, the sheathed pad shown in FIG. 1 is subjected to a thickness reduction treatment. are doing. That is, by pulling the opposite large sides of the sheath together The thickness is reduced. Pull by making stitches 16 through the sheathing. be able to. Stitch 16 is shown as a continuous line.

Because the pad of Figure 2 is thinner, it can be more easily installed within a catalytic converter; There is less risk of its edges becoming pinched between the half-shells to be welded.

In FIG. 3, the stitches 116 are provided in a crossed manner, as shown by the straight lines. Ru. In FIG. 4, the stitches 216 are provided in parallel lines.

In FIG. 5, a plastic tag 316 is shown in the form of a rod with T-bars at both ends. (often used to label clothing) pulls the sides of the outer packaging together and It is used to compress the fibrous material inside the packaging. Tag 316 is inserted by machine. placed in a regular manner.

In Figure 6, separate stitches 416 are used and randomly placed.

abstract The protective material for the catalytic converter block includes a pad of fibrous material in the sheath (10) and the sheath is sewn together (16) by sewing opposite sides of the sheath together. Its depth is reduced in at least local areas or parts by pulling on the It is characterized by being slightly squeezed.

international search report ,--^=,,PCT/GB 91100773ρCT/GB 9110077 3 international search report

Claims (19)

[Claims] 1. A protective material for a contact converter block comprising a pad of fibrous material in the sheath, comprising: , the sheath at least locally by pulling together opposing surfaces of the sheath. The top is characterized in that its depth is reduced in a region or part of the Protective materials. 2. such opposing faces of the sheath are pulled together by a tag passing therethrough; Protective material according to claim 1. 3. Claims wherein the tag is a thick rod with a T-bar at each end Protective material according to paragraph 2. 4. Claims in which such opposing exterior surfaces are pulled together by stitching. The protective material described in item 1 of the scope. 5. Where such tags or such seams are provided on isolated parts of the outer packaging, The protective material according to any one of Items 2, 3, or 4 of the scope of request. 6. In claim 5, wherein such tags or stitches are arranged randomly. Protective materials listed. 7. Claims in which such tags or stitching are arranged in a regular pattern Protective material according to paragraph 5. 8. According to claim 4, such stitching is provided in separate lines. protective material. 9. 9. A protective material according to claim 8, wherein the lines intersect each other. 10. The protection according to claim 4, wherein the seam is provided in a continuous line. protection material. 11. Claims 1 to 10, wherein the exterior is made of plastic material. Protective material listed in any of the above. 12. 12. A protective material according to claim 11, wherein the sheath is sealed. 13. The sheath heats the overlapping edges of the plastic sheet material together. 13. The protective material according to claim 12, which is formed by sealing. 14. Any of claims 1 to 13, wherein the exterior is made of an air permeable material. Protective materials listed in 15. Protection according to claim 14, wherein the air permeable material is a non-woven textile material. material. 16. 16. The protective material according to claim 15, wherein the non-woven textile material is a plastic fiber. protection material. 17. Claim 16, wherein the plastic fiber is polypropylene. protective material. 18. Any one of claims 1 to 17, wherein the fiber pad is made of alumina. Protective materials listed. 19. Substantially as described above with reference to any of Figures 2-6 of the accompanying drawings, Protective materials for the catalytic converter block shown in these.