JPS5914335B2 - Extruder die plate mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a die plate mounting device for an extruder such as a kneading extruder for thermosetting resin molding materials, and a die plate mounting device for an extruder such as a kneading extruder for thermosetting resin molding material. The die plate support 3 is horizontally rotatably mounted on a trolley 25 that can freely travel along the rail 14, and a plurality of mounting plates 4, 4 are attached to the die plate support 3. This relates to a die plate attachment device for an extruder, characterized in that die plates 5, 5 are attached through the die plates 5, 5.

In a kneading extruder for thermosetting resin molding materials, the die plate needs to be replaced frequently due to clogging.

However, conventionally, when replacing a die plate, it was necessary to lift and lower the die plate, which required human labor and time, and it was also necessary to wait for the die plate to warm up after replacing the die plate. This method solves various problems such as it takes a long time to start extrusion, and the positioning of the die plate cannot be accurately determined when attaching the die plate to the extrusion cylinder.

The present invention has been made in view of the above points, and it is possible to quickly replace the die plate without requiring human labor, and furthermore, it is possible to extrude resin immediately after replacing the die plate. Another object of the present invention is to provide a die plate attaching device for an extruder that can attach a die plate to an extrusion cylinder with high positioning accuracy.

The present invention will be explained in detail below with reference to Examples.

FIG. 1 shows the entire structure of the present invention, in which 1 is an extruder, 10 is an extruder;
2 is a hopper for charging materials into the extruder 1, and 2 is a twin-screw kneading extrusion screw 11 attached to the tip of the extruder 1.
．． Extrusion cylinder 2 with built-in extrusion cylinder 11
is double-walled and has a jacket 12 formed thereon.

Reference numeral 14 denotes a rail, which is mounted on the base 13 on which the extruder 1 is mounted, parallel to the direction in which the extrusion cylinder 2 of the extruder 1 is projected, and this rail 14 is formed into a rack shape.

Reference numeral 3 denotes a die plate support, which is mounted on a truck 25 with a rotating shaft 26 equipped with a thrust bearing so that it can be rotated horizontally through 360 degrees in any direction. By rolling them while engaging with each other, it is possible to freely move toward and away from the extrusion cylinder 2 of the extruder 1.

Three mounting pipes 28 are provided protrudingly on the front and back sides of the die plate support 3, respectively, and holes 29 are formed at the ends of the mounting pipes 28 on the front and back sides of the die plate support 3, respectively, as shown in FIG. A die plate 5 is attached to the outer surface of each mounting plate 4 with cap bolts.

By providing the die plate 5 on the front and back sides of the die plate support 3 in this way, when one die plate 5 is used, the other die plate 5 is attached to the extrusion cylinder 2.
This makes it easier to perform operations from the side of the extrusion cylinder 2.

Reference numeral 30 denotes a protrusion pin operating bundle provided on the die plate support 3, which allows the protrusion pin 31 to protrude from the die plate 5 via the attachment pipe 28.

Furthermore, the mounting plate 4 has a built-in jacket, and is designed to maintain the die plate 5 at a set temperature by introducing a heat medium through an inlet 32 and discharging the heat medium through an outlet 33.

Reference numeral 8 denotes a clamp table, and by moving a pinion-shaped traveling wheel 15 attached to the lower part of the clamp table 8 while meshing with a rack-shaped rail 14, the clamp table 8 is attached to the tip of the extrusion cylinder 2 of the extruder 1. It is designed so that it can move freely towards and away from you.

Further, threaded rods 17 and 18 are attached to the upper and lower sides of the fixed frame 16 of the clamp table 8, respectively, an operating bundle 23 is attached to the upper threaded rod 17, and sprockets 19° 19 are fixed to the upper and lower threaded rods 1γ and 18, respectively. The timing chain 20 is placed across the frame so that the upper and lower threaded rods 17 and 18 can be rotated in conjunction with each other in the same direction.

The upper and lower threaded rods 17 and 18 have a threaded portion 21 with a right-hand thread, for example, formed on one side of the center, and a threaded portion 21 with a reverse thread, such as a left-hand threaded portion 22, formed on the other side. .

Reference numeral 9 denotes a semicircular clamp, and screw holes are formed in mounting pieces 38 and 58 protruding from both ends as shown in Fig. 2. The screw hole of the other clamp 9 is screwed into the screw portion 21 and the reverse screw portion 22, respectively.

Therefore, when the threaded rods 1γ, 18 are turned in one direction by the operating bundle 23, the clamps 9, 9 move in opposite directions by the threaded portion 21 and the reverse threaded portion 22, resting on the threaded rods 17, 18, and the threaded rods 1γ, 18 move in opposite directions. 1γ.

18 in the opposite direction, the clamps 9, 9 move toward each other along the threaded rods 17, 18, and the pair of clamps 9, 9 move toward each other along the threaded rods 17, 18.
9 matches the ring.

A fitting groove 1 extending over the entire length is recessed on the inner periphery of the semicircular portion of each clamp 1, and a wedge 24, which becomes thicker at the base, is formed on the inner surface of the fitting groove 1 as shown in FIG. A plurality of pairs are fixedly installed in the fitting groove 7 so as to face each other.

Therefore, in order to attach the die plate 5 to the extrusion tip of the extrusion cylinder of the extruder 1, first rotate the operation bundle 23 → move the shib 9° 9 apart and widen the gap between the clamps 9, 9. , rotate the die plate support 3 on the trolley 25 so that one die plate 5 faces the tip of the extrusion cylinder 2, and then move the trolley 25 onto the rail 1.
This die plate 5 and mounting plate 4
is brought into contact with the tip of the extrusion cylinder 2 at the inner peripheral position of the clamps 9,9.

Thereafter, by operating the operating bundle 23, the threaded rods 17 and 18 are rotated to bring the clamps 9 and 9 closer to each other.
Insert the same end of the mounting flange 6 fixed to the tip of the extrusion cylinder 2 and the same end of the mounting plate 4 into the fitting groove 7 of 9,
The die plate 5, which is clamped by clamps 9 and attached to the mounting plate 4, is fixed to the tip of the extrusion cylinder 2.

In this way, the pair of clamps 9°9 can be split vertically and moved parallel to each other, so when removing the mounting flange 6 or the mounting plate 4 from the fitting groove 1 of the clamps 9, 9,
The inner end of the mounting plate 4 can be completely removed by moving the clamps 9, 9, making it easy to remove the die plate 5.

Also, at this time, tapered surfaces 34.35 are formed at the outer ends of the mounting flange 6 and the mounting plate 4, and when the clamps 9, 9 are tightened, the wedge 24 bites in along the tapered surfaces 34.35. As shown in FIG. 5, the mounting flange 6 and the mounting plate 4 are tightly tightened, and the die plate 5 can be firmly brought into contact with the tip of the extrusion cylinder 2.

In addition, there is no need to use bolts and nuts when attaching the die plate to the extrusion cylinder, making it possible to perform the work quickly and positioning the die plate to the extrusion cylinder by inserting it into the clamp. It is something.

Furthermore, in this case, the die plate support 3 and the clamp stand 8
Both are movable toward and away from the tip of the extrusion cylinder 2 along the rail 14, so the die plate support 3 and the clamp stand 8 move as the clamps 9, 9 are tightened, ensuring uniform tightening without uneven tightening. It is something that you will be able to do.

When carrying out mixed line extrusion of a resin material using the extruder 1 equipped with the die plate 5 in this way, the material is inputted from the hopper 10, fed into the extrusion cylinder 2 by the feeder, and then kneaded and extruded by the twin screws of the extrusion cylinder 2. screw 1
1, and extrude the mixed wire resin material while cutting it into particles through the nozzle hole of the die plate 5. The extruded resin material is conveyed by a conveyor belt 36 provided on the base 13.

Note that FIG. 6 shows the tip of the extrusion cylinder 2, and the tip of the kneading extrusion screw 11 is used to scrape the inner surface of the die plate 5. The kneaded resin material extruded from the nozzle hole of the die plate 5 is granulated. Blade 31 for cutting
is the installation.

In addition, when replacing the die plate 5, such as when the die plate 5 becomes clogged or you want to use a die plate 5 with a different nozzle hole diameter, first extrude the die plate 5 in the reverse procedure of installing the die plate 5. It is removed from the cylinder 2, and then the trolley 25 is moved along the rail 14 to separate the die plate 5 attached to the extrusion cylinder 5 from the extrusion cylinder 5.

When separating the die plate 5 from the extrusion cylinder 5, the die plate 5 is removed by operating the ejecting pin operation bundle 30.
By making the protrusion pin 31 protrude further, the die plate 5 can be easily peeled off from the extrusion cylinder 2 by pressing the protrusion pin 31 against the tip of the extrusion cylinder 2.

After this, the die plate support 3 is rotated 18 times around the rotation axis 26.
The die plate 5 on the opposite side of the die plate 5 removed from the extrusion cylinder 2 by rotating it by 0° is made to face the tip of the extrusion cylinder 2.

After that, attach the die plate 5 facing the tip of the extrusion cylinder 2 by the same operation as the attaching operation of the die plate 5 described above.
is attached to the extrusion cylinder 2.

At this time, the die plate 5 is preheated by the jacket inside the mounting plate 4, so even if the die plate 5 is replaced, extrusion can be performed immediately.

As described above, the present invention includes disposing a rail in front of the extrusion cylinder of the extruder in parallel to the direction in which the extrusion cylinder projects,
The die plate support is mounted horizontally rotatably on a trolley that can travel freely on rails, and the die plate is attached via multiple mounting plates attached to the die plate support, so that the die can be mounted on the front and back sides. The die plate can be replaced by rotating the die plate support with the plate attached in the horizontal direction, and the die plate can be replaced quickly without the need for lifting and lowering the die plate manually. Moreover, since the die plate can be easily replaced in this way, extrusion of the resin molding material can be continued for a long time.

In addition, since the die plate support is mounted on a trolley that can freely run on rails arranged parallel to the direction of extrusion of the extrusion cylinder, the die plate support can be attached to the extrusion cylinder by allowing the trolley to travel on the rails. When the die plate support is positioned close to the extrusion cylinder on the rail, the die plate can be attached to the extrusion cylinder with high positioning accuracy.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the present invention, Fig. 2 is a torso view of the clamp portion of the above, Fig. 3 is a partially cutaway enlarged chest view of the clamp, and Fig. 4 is of the die plate portion of the above. Koma-zozu, No. 5
The figure is a partially omitted enlarged cross-sectional view showing the state in which the extrusion cylinder is mounted using the same clamp, and FIG. 1 is an extruder, 2 is an extrusion cylinder, 3 is a die plate support, 4 is a mounting plate, 5 is a die plate, 14 is a rail,
25 is a trolley.

Claims (1)

[Claims] 1. A rail is arranged in parallel to the protrusion direction of the extrusion cylinder at the front of the extrusion cylinder of the extruder, and a die plate support is installed so as to be rotatable in the horizontal direction on a trolley that can freely run along the rail. A die plate attachment device for an extruder, characterized in that a die plate is attached to the die plate via a plurality of attachment plates attached to the die plate.