JPH0614932Y2 - Filter for molten aluminum filtration - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a joint structure of an assembly composed of a tube filter and an end plate used in a molten aluminum filtering device.

(Prior Art) Generally, aluminum oxide is contained in molten aluminum,
Since inclusions such as metal compounds and non-metal particles such as refractory particles are included, "molten metal treatment" is performed to remove these impurities prior to pouring. For this molten metal treatment, one tube filter and two facing end plates are used.
A filtering device having a built-in assembly is used (see Japanese Utility Model Publication No. 63-47414). In the above-mentioned conventional assembly, as shown in FIG. 4, a plurality of one-end-sealed tube filters 13 are fitted into predetermined recesses 17 and 18 provided in the left and right two end plates 4 and 6, respectively. The side surface of the closed end 14 is fixed to the recess 17 of the blind mirror plate 4 by a mortar 15, while the filter 1
A ring-shaped fitting material 16 is attached between the end face of the molten metal 19 and the end plate 6 of the melt outlet 19 of No. 3, and the side surface of the end 5 of the filter 13 is joined to the recess 5 of the end plate 6. The part is filled with mortar 15 and fixed.

Therefore, in such a conventional assembly 1, the molten metal outlet side end plate 6 is provided with the thermal stress generated by the difference in the coefficient of thermal expansion between each member constituting the assembly and the filter tank constituent material.
-Shaped fitting material 16 provided between the end faces of the filter 13 and the filter 13
It is intended to ease.

(Problems to be Solved by the Invention) However, it is not enough to relieve the thermal stress only by the ring-shaped fitting material 16, and since the concave portion 18 is formed in the end plate 6, cracks particularly occur in the end plate 6. It is liable to occur, the molten metal is short-circuited, the filtration effect is significantly reduced, and when the tube filter assembly is taken out of the filtration tank after the filtration of the molten metal is broken, the work amount is increased.

Moreover, bottoming work is required to manufacture the tube filter 13 with one end sealed, and cracks may occur between the bottom and the cylinder, resulting in very poor productivity.

An object of the present invention is to provide a filter for molten aluminum filtration which improves the disadvantages of the conventional example, improves the strength of the end plate, and facilitates the production of the tube filter.

(Means for Solving the Problems) The present invention is included in a molten aluminum filtration apparatus, and when forming an assembly in which a plurality of tubes and filters are mounted, a blind end plate and a recessed portion are provided with a tube filter having both ends open and a convex portion. And a tube filter, which is inserted between the end plates of the molten metal outlet having an outlet opening in the center thereof, or a tube filter which seals the vicinity of one end, is provided with a blind side end plate having a convex portion and a molten metal outlet having a concave portion and an outlet opening. Between the two end plates and a ring-shaped or disk-shaped cushioning member is attached between the end plates and the end faces of the tube filters, and the gap between the end plates and the tube filter and the blind end plate and the outside of the tube filter. It is a filter for molten aluminum filtration in which a castable refractory material is filled between the ends.

(Operation) As described above, the joint structure of the filter for filtering molten aluminum according to the present invention is such that the buffer is mounted between both end plates and the end faces of the tube filters, and further, when the tube filter is connected between the two end plates, By using an open tube filter or a tube filter that seals near one end, the blind side plate with a thickness of 40 to 60 mm has no recess, and the melt outlet side plate has a thickness of 50 to 80 mm, which is commonly used in the past. Since the plate thickness is increased 1.2 to 1.4 times, the breakage of the end plate can be effectively prevented.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic cross-sectional view of an assembly 1 in which a plurality of tube filters mounted in a molten aluminum filter device according to the present invention are mounted. 50mm blind side plate 4,
Thickness 70mm with receiving recess 6a around outlet 6b
Of the molten metal outlet side end plate 6, and the ring-shaped buffer 7 is mounted between the end plates 4 and 6 and the end face of the tube filter 2, and the outlet side end plate 6 and the tube filter 2 are attached.
A castable refractory hardened material 8 is filled between the end side inner surface and the blind side end plate 4 and the end inner surface of the tube filter 2. That is, by doing so, even when the tube filter assembly 1 is taken out from the filtration tank after the completion of the molten metal filtration, the end plates 4 and 6 can be prevented from being broken.

To assemble the assembly 1, the molten metal outlet side end plate 6 is placed horizontally on the table, and the ring-shaped buffer 7 is placed in the recess 6a.
Next, attach the tube filter 2 with both ends open to the recess 6a.
The castable refractory 8 is filled in the gap between the recess 6a and the tube filter 2 and left standing for about one day until it hardens. After that, the ring-shaped cushion 7 is attached to the straight convex portion 3 of the blind side mirror plate 4, the castable refractory material 8 is applied, and then the blind side mirror plate 4 is placed from above the tube filter 2 standing vertically. Is placed so that it fits into the opening of the tube filter 2.

After that, the end plate and the filter tube are fixed with an appropriate jig and rotated by 180 °, and the castable refractory 8 is filled between the blind end plate 4 and the outer end of the tube filter 2 and cured.

FIG. 2 is a schematic cross-sectional view of an assembly showing another embodiment according to the present invention. A tapered taper convex portion 10 to which one end of the filter tube 2'opened at both ends is fitted with a taper taper portion 9 of the filter. It is inserted between the blind side end plate 4 provided with and the melt outlet side end plate 6 provided with the recess 5.

FIG. 3 is a schematic sectional view of an assembly according to still another embodiment of the present invention, in which a tube filter 11 having a closed bottom near one end is fitted into a raised bottom 1a of the filter. Blind side end plate 4 and recess 6a
And the molten metal outlet side end plate 6 provided with the outlet opening 6b.

(Advantage of the Invention) According to the joining structure of the filter for filtering molten aluminum according to the present invention, the blind side end plate has no recess even if the plate thickness is not thickened, so that the strength is improved and the end face plate on the melt outlet side is generally used. Since the plate thickness is 1.2 to 1.4 times larger than the existing one, there is no destruction of the end plate and there is no short circuit of the molten metal.
The amount of work for removing the assembly from the filtration device can be reduced.

Further, in the inventions of claims 1 and 2, since the tube filter with one end sealed which has been conventionally used is a tube filter with both ends open, the productivity of the tube is improved.

Further, in the invention of claim 2, there is an advantage that adhesion between the end plate and the filter is improved by providing a taper at the tip end on the side where the both ends open tube filter is fitted to the blind side end plate convex portion.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an assembly in which a plurality of tube filters included in a molten aluminum filtering device according to the present invention are mounted, and FIG. 2 is an assembly showing another embodiment of FIG. 1 according to the present invention. FIG. 3 is a schematic sectional view of an assembly showing still another embodiment of FIG. 1 according to the present invention. FIG. 4 is a schematic sectional view of a conventional assembly. DESCRIPTION OF SYMBOLS 1 ... Assembly, 2 and 2 '... Tube filter with open both ends, 2a ... Raised bottom part, 3 ... Convex part, 4 ... Blind end plate, 5 ... Exit side end part, 6 ... Melt outlet Side panel, 6
a: its concave portion, 6b: its outlet opening, 7: a ring-shaped cushioning material, 8: a castable refractory material, 9: a tapered taper portion, 10: a tapered tapered convex portion, 11:
A tube filter sealed near one end, 12 ... Disc-shaped buffer, 13 ... Conventional end-sealed tube filter, 14 ... Its closed end, 15 ... Its mortar, 1
6 ... the ring-shaped fitting, 17 ... the recess, 18 ...
… The recess, 19 …… The melt outlet.

Claims (3)

[Scope of utility model registration request] Claim: What is claimed is: 1. A molten aluminum filtering apparatus which is internally mounted to form an assembly in which a plurality of tube filters are mounted, wherein a tube filter having both ends open is projected from a plate surface so as to fit into an opening at one end of the tube filter. The blind side end plate provided with the convex part, the concave part for receiving the other end of the tube filter, and the molten metal outlet side end plate provided with the outlet opening in the central part of the concave part A ring-shaped cushioning member is attached between the tube filter end surface and a gap between both end plates and the end surface of the filter,
And a filter for filtering molten aluminum, wherein a castable refractory material is filled between the blind end plate and the outer end surface of the filter. 2. A molten aluminum filtering apparatus which is internally mounted to form an assembly in which a plurality of tube filters are mounted, wherein one opening of a tube filter having both ends open is made into a divergent tapered portion and fitted to the tapered portion of the filter. A blind side end plate having a tapered tapered convex part protruding from the plate surface, a concave part for receiving the other end of the tube filter and an end plate on the melt outlet side provided with an outlet opening in the central part of the concave part. A tube filter having a divergent taper portion is inserted and attached, and a ring-shaped buffer is mounted between both end plates and the end face of the filter, and a gap between both end plates and side ends of the filter, and a blind end plate and the filter. A filter for molten aluminum filtration in which a castable refractory hardened material is filled between the outer ends of the. 3. A molten aluminum filtering apparatus which is internally mounted to form an assembly in which a plurality of tube filters are mounted, wherein the tube filter sealed near one end as a raised bottom is fitted to the raised bottom of the filter. A blind side end plate provided with a convex portion, a concave part for receiving the other end of the tube filter, and a molten metal outlet side end plate having an outlet opening at the center of the concave part. A ring-shaped and disk-shaped cushioning material is mounted between the filter and the end surface of the filter, and a castable refractory material is placed between the end plates of the filter and the blind end plate and the outer end of the filter. A filter for filtering molten aluminum that is filled.