JP2577232Y2 - Extruder die holding device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die pressing device for pressing and fixing a die on a die slide of an extruder for extruding a metal material such as aluminum.

[0002]

2. Description of the Related Art As a die holding device of an extruder, as shown in Japanese Utility Model Laid-Open Publication No. 57-127317, a die is set in a die receiving portion of a die slide, and the die holder is fastened to the die slide with bolts and nuts. It is known that a die is pressed down and fixed. Also, Japanese Patent Application Laid-Open
As shown in JP-A-141319, there is known an apparatus in which a tightening rod is pressed against a die by a hydraulic cylinder and fixed to a die slide.

[0003]

In the former die holding device, since the die is pressed against the die by the tightening force of the die holding bolt / nut, the die pressing force is weak and the die cannot be completely fixed. If the dice cannot be fixed completely, the dice will not be easily tilted to the container side when cutting off the disc card, or dripping will occur, causing air entrapment at the next extrusion.

In the latter die holding device, the die can be strongly pressed by the hydraulic pressure of the hydraulic cylinder and completely fixed.
Since the hydraulic cylinder and the tightening rod are located right above the die slide, the vertical space becomes large.

Therefore, an object of the present invention is to provide a die holding device for an extruder which can solve the above-mentioned problems.

[0006]

A press lever 28 for pressing and fixing the die 16 into the die support recess 24 is vertically rotatably mounted on the die slide 10 having the die support recess 24. The press lever 28 is disposed above the press lever 28. A pressing rod 39 is supported on the vertical guide 32 provided at the upper surface of the pressing rod 39 so as to be vertically movable in opposition to the pressing lever 28, and a cam groove 40 inclined with respect to the horizontal is formed on the pressing rod 39. A die holding device for an extruder in which a fitted cam lever 41 is slidably supported on a vertical guide 32 in a horizontal direction, and the vertical guide 32 is connected to a cam operating cylinder 43 mounted in a horizontal direction.

[0007]

[Work] Since the pressing rod 39 is pressed down by the hydraulic pressure of the cam operating cylinder 43, the die 16 can be pressed and fixed to the die supporting recess 24 by the pressing lever 28, so that the die 16 can be firmly fixed to the die slide 10. Since the cam operating cylinder 43 is mounted in the horizontal direction, the space in the vertical direction can be reduced.

[0008]

[Embodiment] As shown in FIG. 1, a billet shearing device 2 and an extruder 3 are sequentially arranged on the outlet side of a heating furnace 1, and a cutting machine 4 and an extruded material conveying device 5 are provided on the extruding side of the extruder 3. Is disposed, and the metal material heated in the heating furnace 1 is sheared into billets of a predetermined length by the billet shearing device 2, and the billets are transported to the extruder 3 by the transport means 6, and the extruder 3 uses the arrow a The extruded material is cut by a cutter 4 and conveyed by an extruded material conveying device 5 in the direction of arrow b.

The extruder 3 has a die slide 10 reciprocally movable in a direction (arrow c) perpendicular to the extrusion direction (arrow a). The die slide 10 comprises a slider 11 and a die cassette 12, as shown in FIGS. 2 and 3. The slider 11 and the die cassette 12 are slidably guided along upper and lower cassette guides 13, 14 serving as upper and lower guides. A die 15 for discharging a billet is formed on the slider 11 when extrusion molding cannot be performed due to clogging of the die.
The die cassette 12 has a die 1 for extrusion.
6 is removably provided, and the rod 1 reciprocates by a cassette clamp cylinder 17 provided on the slider 11.
8 into the fitting recess 20 of the die cassette 12.
And the cassette clamp cylinder 17 is contracted to fit the fitting projection 19 into the fitting recess 20 to draw the die cassette 12 to the slider 11 and fix it. The die cassette 12 is moved by the die cassette replacement cylinder 21 between the extrusion operation position and the billet discharge position.

As shown in FIG. 4, the die cassette 12 has an upper surface 12a, a lower surface 12b, a left vertical surface 12c, and a right vertical surface 1c.
2d, a front vertical surface 12e, and a rear vertical surface 12f are formed in a block shape, and upper guide grooves 22 and lower guide grooves 23 are continuously formed in the upper surface 12a and the lower surface 12b in the left-right direction. A dice support recess 24 opened in the upper surface 12a is formed continuously in the front-rear direction. The front vertical surface 12e side of the dice support recess 24 has a large diameter portion 24a.
And a notch stepped portion 2 on the front vertical surface 12e side portion of the upper surface 12a.
5 are formed.

As shown in FIGS. 2, 3 and 4, a key 26 is mounted on the bottom of the dice support recess 24, and a substantially upward U-shaped support piece 27 is mounted on the large diameter portion 24a.
One end of a holding lever 28 is supported on the notch step 25 by a pin 29 so as to be vertically rotatable. An arc-shaped concave portion 30 is formed on the lower surface of the holding lever 28, and a cushioning material 31 is provided on the upper surface.
Is installed.

FIGS. 2 and 3 show the upper cassette guide portion 13.
The vertical guide 32 is attached as shown in FIG. 3, and the vertical guide 32 has a U-shaped guide block 36 formed by a vertical plate 33, a vertical piece 34 on one side, and a vertical piece 35 on the other side. Piece 3
The cover 37 attached to each of the guides 4 and 35 forms a shape having a rectangular vertical guide portion 38, and a pressing rod 39 is fitted to the vertical guide portion 38 so as to face the cushioning material 31 of the holding lever 28 so as to be vertically swingable. I have. A cam groove 40 inclined with respect to the horizontal is formed in the pressing rod 39, and a cam lever 41 inclined with respect to the horizontal is fitted into the cam groove 40 so as to be slidable left and right. Guide grooves 34a, 35a of one side / other side vertical pieces 34, 35
The cam lever 41 is connected via a connecting rod 42 to a cam operating cylinder 43 mounted on the upper cassette guide 13 in a horizontal direction.

Next, the operation will be described. As shown in FIGS. 2 and 3, a small amount of pressure oil is supplied to the reduction chamber of the cylinder 21 for exchanging the die cassette, the die slide 10 is held at the extrusion operation position, and the extrusion die 16 is concentric with the billet A. And the cam operating cylinder 43 is contracted to
To the right of FIG. This allows the pressing rod 3
5 moves downward as shown in FIG. 5 and pivots the holding lever 28 downward through the cushioning material 31 to press the arcuate concave portion 30 against the upper surface of the die 16 so that the circular concave portion 30 is pressed into the die supporting concave portion 24 of the die cassette 12. Press and fix. In addition, the die 16 is positioned in the circumferential direction by the key 26.

When the die is to be replaced, the cam operating cylinder 43 is extended, the cam lever 41 is moved to the position shown in FIG. 2 and the pressing rod 39 is moved upward to separate from the cushioning material 31. In this state, the die cassette is replaced. The die cylinder 10 is extended to move the die slide 10, the cassette clamp cylinder 17 is extended to separate the die cassette 12 from the slider 11, and in that state, the die cassette 12 is removed and a new die cassette is set.

[0015]

The holding lever 28 is pushed down by the pressing rod 39 by the hydraulic pressure of the cam operating cylinder 43.
As a result, the die 16 can be pressed and fixed to the die supporting recess 24, so that the die 16 can be firmly fixed to the die slide 10. Since the cam operating cylinder 43 is mounted in the horizontal direction, the space in the vertical direction can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall schematic plan view of an extrusion apparatus.

FIG. 2 is a partially cutaway front view of a die slide.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a perspective view of a die cassette.

FIG. 5 is a cross-sectional view of the die fixed state.

[Explanation of symbols]

10: die slide, 12: die cassette, 16: dice, 24: dice support concave part, 28: holding lever, 32
... vertical guide, 39 ... pressing rod, 40 ... cam groove, 41
... Cam lever, 43 ... Cam operating cylinder.

Claims (1)

(57) [Scope of request for utility model registration] A press lever for pressing and fixing a die into the die support recess is mounted on the die slide having a die support recess so as to be vertically rotatable, and a vertical guide provided above the press lever is provided. A pressing rod 39 is supported on the pressing rod 39 so as to be vertically movable in opposition to the pressing lever 28, and the pressing rod 39 has a cam groove 4 inclined with respect to the horizontal.
0, and the cam lever 41 fitted in the cam groove 40 is formed.
Characterized in that the vertical guide 32 is slidably supported in a horizontal direction on a vertical guide 32, and the vertical guide 32 is connected to a cam operating cylinder 43 mounted in a horizontal direction.