JPS5813327B2 - Kongou Souchi no Seizouhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a mixing device for mixing objects by dividing a flow of objects.

For example, as a device for mixing substances by dividing the flow of the substances, as described in Japanese Patent Publication No. 44-8290, a large number of helical elements are arranged so that their edges contact the edges of adjacent elements. A device is known in which the tube is connected at a certain angle to the tube and is installed inside a tube.

This type of mixing device is a continuous type device with no moving parts and is known as a so-called static mixing device.The required power is only enough to compensate for the flow pressure loss of the fluid, and the mixing performance is also excellent.

However, it is cumbersome to manufacture a large number of helical elements and connect them one after another.Moreover, when installing a large number of helical elements into a pipe, the side edges of each element must be brought into close contact with the inner wall of the pipe. is accompanied by various difficulties.

This invention was made in view of the above-mentioned points in an attempt to extremely easily manufacture a so-called static mixing device. The synthetic resin tube is formed by extrusion molding, the synthetic resin tube is cut in a direction perpendicular to the axis to form short tubes, and a plurality of the short tubes are coaxially arranged so that the partition plates at adjacent cut surfaces intersect. The present invention relates to a method of manufacturing a mixing device, characterized in that:

The method of this invention will be explained below with reference to embodiments of the drawings.

In FIGS. 3 to 5, 1 is an extruder for extruding resin for pipes, 2 is an extruder for extruding resin for spirally curved partition plates, and both extruders 1, 2 A die 3 in the form of a crosshead die is attached to the tip of the die.

The die 3 includes an outer die 31 and an inner die 32. The inner die 32 is rotatably inserted into the outer die 32, and an annular resin passage 4 is formed between the outer die 31 and the inner die 32.

The tip of one extruder 1 is attached to an external die 31, and the resin 5 extruded from this extruder 1 passes through an annular resin passage 4 and is continuously extruded from the tip of the die 3 as a tube 6. .

The rear end of an internal die 32 is rotatably attached to the tip of the other extruder 2 .

A resin passage 7 is provided inside the internal die 32 along its longitudinal direction, and the tip of this resin passage 7 has a plate-like cross section, so that the resin 7 extruded from the extruder 2 flows from the tip of the internal die 32 into the plate. However, since the internal die 32 is rotated by a drive device (not shown), the plate-shaped body 9 extruded from the internal die 32 is curved in a spiral shape, and its side edges are annular. Pipe body 6 extruded from resin passage 4
The partition plate 9 is fused to the inner wall of the partition plate 9.

The resins 5 and 8 extruded from both extruders 1 and 2 are not limited to the same type of resin, but may be different types of resin.

Thus, simultaneously with the molding of the tubular body 6, the partition plate 9, which is spirally curved in the internal longitudinal direction, is integrally and continuously formed.

Incidentally, by reversing the rotational direction of the internal die 32, the helical direction of the partition plate 9 can be reversed.

A short tube 10 is obtained by cutting the same tube in a direction perpendicular to its axial direction.
Make 10...

Although it is preferable to cut the short pipes 10, 10, . . . at a point where the partition plate 9 has turned 90 degrees or 1800 degrees, the lengths of the short pipes 10, 10, . . . are not necessarily limited to these lengths.

Next, the short tubes 10, 10 are glued together coaxially so that the ends of the internal partition plates 9 intersect the ends of the partition plates 9 of adjacent short tubes, or the short tubes are glued together or not glued together. However, the crossing angle is determined as appropriate depending on the type of mixed fluid and the purpose of mixing.Also, it is preferable to alternately arrange the short pipes of the partition plate 9 whose helical direction is to the left and to the right. Although it is preferable, only those in the same direction may be used.

In addition, although a plurality of short tubes are arranged coaxially, a plurality of short tubes are placed on the second
It may also be housed within the cylindrical body 11 as shown in the figure.

As described above, in this invention, the spirally curved partition plate and the pipe body are integrally molded by extrusion molding, and this is cut into short pipes. This eliminates the trouble of separately manufacturing the pipe body and the troublesome work of providing the partition plate inside the pipe so that the side edge of the partition plate sticks to the inner wall of the pipe body and divides the inside of the pipe in the longitudinal direction. A mixing device can be manufactured very easily simply by arranging the short tubes coaxially.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an example of a mixing device manufactured by the method of the present invention, Fig. 2 is a plan view of another embodiment, and Fig. 3 is a spirally curved partition used in the method of the present invention. A cross-sectional view showing an example of a method for manufacturing a tube having plates, FIG. 4 is similar to FIG. 3 IV.
FIG. 5 is a sectional view taken along the line V-V in FIG. 3. 1, 2... Extruder, 31... External die, 9... Spiral curved partition plate, 10...
Short tube.

Claims (1)

[Claims] 1 A synthetic resin pipe whose interior is divided in the longitudinal direction by a spirally curved partition plate is formed by extrusion molding, the synthetic resin pipe is cut in a direction perpendicular to the axis to form short pipes, and a plurality of the short pipes are formed. A method for manufacturing a mixing device, characterized in that the mixing devices are arranged coaxially so that the partition plates at adjacent cut surfaces intersect.