JPS6160724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an apparatus for manufacturing an extruded profile having high fins.

2. Description of the Related Art In general, an extruded molded material having tall fins, as shown in FIG. 1, for example, is integrally provided with parallel thin tall fins 2 on both sides of a thick molded material body 1a. Conventionally, as shown in FIGS. 9 and 10, for example, a die for manufacturing such a shaped material 1 has a die 53 provided with a large number of thin-walled convex portions 56 that protrude long into an opening 55. Opening hole 5
5, a narrow hole 55a for forming the thin and tall fin 2, and a remaining wide hole 55b for forming the thick profile body 1a were formed. During the extrusion process, the heated billet of aluminum or the like forms a narrow hole 55a and a wide hole 55b.
A rectifier plate 51 is arranged on the billet inflow side of the die 53 so that the billet flows at a uniform speed.
Those billet inflow prevention parts 51a are the dice 53.
It was visible through the wide hole 55b.

However, in such a conventional die 53, the convex portion 56 protruding into the opening 55 is long and thin, and its strength is relatively low. 1
As shown in FIG. 1, some of the protrusions 56a are damaged by the pressing force of the heating billet, and the service life of the die 53 is significantly shortened, and some of the protrusions 56b are damaged by the pressing force of the heating billet. There was a problem in that the dimensional accuracy of the molded material deteriorated due to bending, resulting in defective products. In order to solve such problems, the following methods have been tried in the past. That is, the extruder is equipped with a rectifying plate 51 and a die 5.
3, a separately melted molten metal of the same metal as the billet is poured into the apertures 52 of the rectifying plate 51, and then the metal filled in the apertures 52 is cooled and the metal is poured into the apertures 52. After that, the metal filled rectifying plate 51 is set in an extruder together with the die 53, and the billet in the container of the extruder and the metal in the rectifying plate 51 are heated together, and extrusion processing is performed. Ta. This is intended to equalize the pressing force of the heated metal applied to the surface of the die 53. However, even with this method, a fully satisfactory result has not been obtained, and the above-mentioned work has the disadvantage that it is very troublesome and time-consuming.

OBJECT OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to eliminate the possibility that the thin-walled convex part in the opening of the die is damaged by the pressing force of the heated billet during extrusion processing. The life of the mold can be significantly increased, and since the convex part inside the hole is not bent by the pressing force of the heated billet, the dimensional accuracy of the mold material is very good, and there is no possibility of producing defective products. , it is an object of the present invention to provide an apparatus for manufacturing an extruded mold material having high fins.

Composition of the Invention In order to achieve the above object, the present invention has a plurality of thin-walled convex portions that protrude long inside the opening,
A die body in which a narrow hole portion for forming a plurality of high fins and a remaining wide hole portion for forming a thick-walled mold body are formed in the opening by these convex portions; In an apparatus for producing an extruded material having high fins and a rectifying plate superimposed on the upper surface of a die body and having a plurality of openings for inflowing the heating billet, a convex portion is formed on the wall surface of the die body on the heating billet inflow side. A reinforcing bridge is provided to straddle all the convex parts, and the part facing the convex parts of this bridge and the part near the tip of each convex part are connected to each other by connecting parts, and the connecting parts that are adjacent to each other are connected to each other by connecting parts. A heating billet merging gap is provided between the holes, a communication section is provided on the lower surface of the rectifying plate to communicate the heating billet inflow openings, and a recess into which a convex reinforcing bridge is fitted is provided on the upper wall of this communication section. The gist of this paper is an apparatus for producing extruded mold materials with high fins.

Embodiments Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an extruded aluminum profile 1 used, for example, in a heat radiator. As mentioned above, this is made up of a thick profile main body 1a and thin, tall fins 2 arranged in parallel on both sides of the profile. It is something.

FIG. 2 shows a die 3 for producing the extruded material 1, which has the following construction. In other words, the disk-shaped die body 4
, six thin-walled protrusions 6 on the left and right sides that protrude long into the aperture 5 are provided.
Narrow hole portions 5a for forming seven high fins 2 on the left and right sides and a remaining wide hole portion 5b for forming the thick mold body 1a are formed, and the heated billet inlet side of the die body 4 is formed. Two protrusion reinforcing bridges 8, which are generally long when viewed from the side, are provided on the wall surface 7 in a state in which they straddle the left and right protrusions 6 and are parallel to each other. and a portion 6a near the tip of each convex portion 6 are connected to each other by a connecting portion 9, and a heating billet merging gap 1 is formed between adjacent connecting portions 9.
0 is set. Note that the tips of the legs 8b integrally provided at both ends of each bridge 8 are joined to the die wall surface 7 by welding, and the bridges 8
Each tip of a connecting portion 9 provided integrally with the protrusion-opposed portion 8a is joined to a portion 6a of the protrusion 6 near the tip by welding.

FIG. 3 shows a rectifying plate 11 that is combined with the die 3 to produce the extruded material 1.
Four openings 13 larger than the openings 5 are provided, and an H-shaped heated billet inflow prevention part 12 is provided in the center when viewed from above, and heating billet inflow holes 13 are formed on the lower surface of the rectifying plate 11. A communication part 15 is provided to communicate with the upper wall 1 of this communication part 15.
6, that is, the left and right side portions 12a of the H-shaped blocking portion 12
Convex reinforcing bridge fitting recesses 14 each opening toward the die 3 side are provided in the length direction of both side portions 12a on the lower wall of the die.

Figures 4 and 5 show the above die 3 and rectifying plate 1.
This shows the state in which rectifying plate 1 is combined with 1.
1 is arranged on the billet inflow side of the die 3, and the right and left sides 1 of the H-shaped billet inflow prevention part 12 are arranged on the billet inflow side of the die 3.
2a are respectively fitted over the bridges 8 on both the right and left sides of the die 3, and each bridge 8 is fitted into the recess 14, and the center portion 12b of the billet inflow prevention portion 12 is inserted into the wide opening 5 of the die 3. Hole 5b
It is made to look up to.

When the heated aluminum billet is extruded in the container of the extruder, as shown in the figure, the flow of the heated billet is first dispersed by the H-shaped inflow prevention part 12 of the rectifying plate 11. It flows into the opening 13 of the current plate 11, and then the narrow hole 5a and wide hole 5b of the opening 5 of the die 3.
It flows into. At this time, the heating billets on both sides of the left and right convex reinforcing bridges 8 are connected to the connecting portions 9.
Flowing into the gap 10 between comrades and joining each other,
Furthermore, it flows into the narrow gap 5b between the protrusions 6. Since the portion 6a near the tip of each convex portion 6 is connected to the bridge 8 via the connecting portion 9, the convex portion 6 is prevented from being damaged or bent by the pressing force of the heating billet. Not at all. Furthermore, since both the left and right bridges 28 are fitted into the recesses 14 of the current plate 11, it is possible to reliably prevent these bridges 28 and the connecting portion 9 from falling laterally.

In the above embodiment, the leg portion 8b and the connecting portion 9, which are integrally provided on each bridge 8, are welded to the wall surface 7 of the die body 4 and the portion 6a near the tip of the convex portion 6, respectively. Therefore, the entire die 3, that is, the die body 4, and
The convex portion 6, the bridge 8, and the connecting portion 9 may be integrally formed.

FIG. 6 shows a second embodiment of the present invention. The difference from the first embodiment is that the die body 24 has an opening 5 of the die 3 of the first embodiment.
An opening 25 having a shape approximately half of
In addition, only one brittle 28 is provided to reinforce the thin protrusion 26.

The other points of this second embodiment are almost the same as those of the first embodiment, and in the drawings, the numbers in the ones place are all the same and the numbers in the tens place are all "2". The symbol has been added.

FIG. 7 shows a third embodiment of the present invention, which differs from the first embodiment described above in that the thick-walled profile body 1a is formed in the opening 35 formed in the die body 34. The wide hole 35b has an inverted T shape when viewed from above, and the convex reinforcing bridge 3
8 straddles a large number of convex portions 36 and one side of the inverted T-shaped wide hole 35b.

The other points of this third embodiment are almost the same as those of the above-mentioned first embodiment, and corresponding parts in the drawings have the same numbers in the ones place and all numbers in the tens place are "3". has been attached.

FIG. 8 shows a fourth embodiment of the present invention, which differs from the first embodiment described above in that the thick-walled material body 1a is formed in the opening 45 formed in the die body 44. The wide hole portion 46b for forming the bridge is constituted by a wide hole portion 45b which is circular when viewed from above, and a narrow hole portion 45a for forming a large number of high fins 2 extending radially from the wide hole portion 45b, and the bridge 48 is annular. a protrusion facing portion 48a;
Support part 48c with legs 48b extending from this in all directions
This point is made up of the following.

The other points of this fourth embodiment are almost the same as those of the first embodiment, and corresponding parts in the drawings have the same numbers in the ones place and all numbers in the tens place are "4". has been attached.

The present invention is applicable not only to the production of the extruded material 1 having the shape shown in each of the above embodiments, but also to the production of extruded material 1 of various shapes having high fins.

Effects of the Invention As described above, the present invention provides the openings 5, 25, 3.
5, 45 have a plurality of thin-walled convex portions 6, 26, 36, 46 that protrude long inside, and these convex portions 6,
Opening holes 5, 25, 35, 4 by 26, 36, 46
5, narrow holes 5a, 25a, 35a, 45b for forming a plurality of high fins 2, and remaining wide holes 5b, 25b, 35b, 45b for forming a thick mold body 1a. die bodies 4, 24, 34, 44, and a rectifying plate 11 which is superimposed on the upper surface of the die bodies 4, 24, 34, 44 and has a plurality of heating billet inflow openings 13. In the apparatus for manufacturing an extruded material having high fins, the die bodies 4, 24, 3
A convex reinforcing bridge 8, 28, 38, 48 is provided on the wall surface on the inflow side of the heating billet 4, 44 so as to straddle all the convex portions 6, 26, 36, 46,
The convex opposing portions 8a, 28a, 38a, 48a of the bridges 8, 28, 38, 48 and the convex portions 6, 2
6, 36, 46 are connected to the connecting portion 9,
29, 39, 49, and heating billet merging gaps 10, 20, 30, between adjacent connecting parts 9, 29, 39, 49.
40, a communication part 15 for communicating the heated billet inflow openings 13 is provided on the lower surface of the rectifying plate 11, and a recess 14 for fitting a convex reinforcing bridge is provided in the upper wall 16 of this communication part 15. With what I have,
During extrusion, the protrusion reinforcing bridges 8, 28, 38, 48 and the connecting parts 9, 29, 39, 49 can be prevented from falling sideways due to the pressing force of the heated billet, and the die 3, 23, 33, 43
The convex portions 6, 26, 36, 46 of the die are completely prevented from being damaged by the pressing force of the heated billet, and the life of the dies 3, 23, 33, 43 can be significantly increased. ,25,35,4
Since the convex portions 6, 26, 36, and 46 in the molded material 5 are not bent by the pressing force of the heated billet, the dimensional accuracy of the molded material 1 is very good, and there is an effect that no defective products are produced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an extruded material having tall fins, Fig. 2 is a plan view of the die of the first embodiment of the present invention, Fig. 3 is a plan view of the rectifier plate, and Fig. 4 is a plan view of the die of the first embodiment of the present invention. FIG. 5 is a longitudinal cross-sectional view of the convex reinforcing bridge portion in the combined state of the rectifier plate, FIG. 5 is a cross-sectional view taken along the line of FIG. 4, FIG. The figure is a plan view of a die according to a third embodiment of the invention, and FIG. 8 is a plan view of a die according to a fourth embodiment of the invention. Figures 9 to 11 show conventional examples, Figure 9 is a plan view of the combination of the die and rectifying plate, and Figure 10 is Figure 9
FIG. 11 is a cross-sectional view taken along the line, and a partially enlarged plan view for explaining the damaged state of the convex portion in the aperture of the die. 1... Extruded material, 2... Tall fins, 3,2
3, 33, 43...Dice, 4, 24, 34, 4
4...Dice body, 5, 25, 35, 45...Opening hole, 5a, 25a, 35a, 45a...Narrow hole, 5b, 25b, 35b, 45b...Wide hole, 6, 26, 36, 46... Thin protrusion, 6
a, 26a, 36a, 46a... part near the tip, 7, 27, 37, 47... die wall surface, 8,
28, 38, 48...Protrusion reinforcement bridge, 8a,
28a, 38a, 48a...Protrusion facing portion, 9, 2
9, 39, 49...Connection part, 10, 20, 30,
40...Heating billet merging gap, 14...Protrusion reinforcement bridge fitting recess, 15...Communication portion, 16
...Top wall.

Claims (1)

[Claims] 1 It has a plurality of thin-walled protrusions that protrude long into the opening, and these protrusions form a narrow hole for forming a plurality of high fins in the opening, and a thick-walled mold body. An extrusion device having high fins comprising a die body in which a remaining wide hole is formed and a baffle plate superimposed on the upper surface of the die body and having a plurality of heating billet inflow openings. In a mold manufacturing device, a protrusion reinforcing bridge is provided on the wall surface of the die body on the heating billet inflow side, spanning all the protrusions. are connected to each other by a connecting part, a heating billet merging gap is provided between the adjacent connecting parts, and a communicating part is provided on the lower surface of the rectifier plate to communicate the heating billet inflow openings. An apparatus for manufacturing an extruded material having high fins, and a recess into which a convex reinforcing bridge is fitted is provided on the upper wall of the communicating portion.