JPS5946762B2 - Method for manufacturing a mixing agitator and its device - Google Patents

Description

Detailed Description of the Invention (Object of the Invention) The present invention provides a mixing agitator in which right-handed and left-handed wing pieces are arranged in succession in a pipe so that they are alternately orthogonal to each other by extrusion processing. The present invention relates to a method for manufacturing a mixing agitator and an apparatus therefor, in which a twisted blade and a blade are integrally molded at the same time.

(Prior art) A conventional mixing agitator in which right-handed and left-handed twisting blades are arranged orthogonally and alternately in a pipe, separates the pipe and the twisting blades, and inserts the twisting blades into the pipe. The pipe and the twisted wing piece were fixed by gluing or crimping.

However, when this method is used to make ceramics, the difference in shrinkage rates between the pipe and the twisted blades during firing tends to cause cracks in the bonded parts and breakage, resulting in extremely low product yields. . Also, if the adhesive oozes out from the joint surface and solidifies, it will flow inside the container due to the unevenness created by the solidified adhesive.
This prevented the smooth flow of fluids, etc., and sometimes caused them to get clogged inside the container and stop flowing. (Structure of the Invention) The present invention solves the above-mentioned drawbacks.The present invention is aimed at solving the above-mentioned drawbacks.The present invention is aimed at solving the above-mentioned drawbacks. A bag blade is provided and the core metal is rotated at a desired speed, extruding the plastic material as a pipe from the gap between the die and the core metal, and at the same time, a right-handed or left-twist twist wing piece is integrated with the pipe from the gap between the core metals. This will be explained below using examples shown in FIGS. 1 to 6.

In FIGS. 1 and 2, a bent drum 1 is connected to a conduit A connected from an extrusion processing machine (not shown), and a nozzle 3 is attached to the end of the drum 1 via a bearing plate 2. You can put dice 4 on the tip of the.

A rotating shaft 5 is supported within the drum 1 by a bearing plate 2, and a drive unit 6 that can freely rotate in forward and reverse directions is attached to the end of the rotating shaft 5 that projects outside the drum 1.
be linked. Semicircular core metals 7, 7 as shown in FIG. 2 can be attached to the ends of the rotating shaft 5 in the noise 3 so as to face each other with a required gap a. Attach twist wing cutting blades 8, 8 to the end faces of the core metals T, T. The torsion wing cutting blades 8,8 are kept open while the extrusion cuff is activated and the plastic material is being extruded. An extrusion speed that automatically detects the extrusion speed by contacting the outer peripheral surface of the pipe P of the mixing agitator W extruded to the left of the die 4, and automatically controls the rotation of the rotating shaft 5 by feeding back to the drive unit 6. A detector 9 is provided. b in the figure is a gap between the outer peripheral surfaces of the cored metals 7, 7 and the die 4. In the embodiment, two screws 7, 7 are placed opposite each other to form two divided wing pieces, but as shown in FIG. /,
7', 7' facing each other, or as shown in Fig. 4, four core metals T, 7'', etc. facing each other to form a twisted wing piece divided into three or four parts. It is also easy to do so. 8' and 8'' are twisted blade cutting blades, respectively.

(Operation of the Invention) To explain the practical use of the present invention, the plastic material M under pressure applied by the extrusion process is sent through the conduit A and the drum 1 to the nozzle 3.

The core metals 7, 7 connected to the rotating shaft 5 rotate at a required speed in conjunction with the drive unit 6, and the plastic material M is formed between the inner circumferential surface of the die 4 and the outer circumferential surface of the core metals 7, 7. The pipe P is extruded from the gap b. At the same time, the plastic material M is integrally extruded from the gap a of the core metals 7, 7 onto the inner peripheral surface of the pipe P, but since the core metals 7, 7 are continuously rotating, the plastic material M is It is twisted and extruded to the right or left depending on the direction of rotation. In the mixer W shown in FIG.
, 7 were rotated 180 degrees in the S direction while extruding the plastic material M to form the left-handed twisted wing pieces L integrally inside the pipe P, and the core metals 7, 7 were rotated 180 degrees from their initial positions. By the way, the extrusion was temporarily stopped, and the twisting blade cutting blades 8, 8
Cut the left-handed wing piece L with . Next, the core metals 7, 7 are reversely rotated 90 degrees to the left, and at the same time as extrusion is restarted, the pipe P and the right-handed wing piece R are extruded while rotating the core metals 7, 7 180 degrees in the O direction. When the core metals 7, 7 have rotated 180 degrees, the extrusion is stopped again, the right-handed wing piece R is twisted, and the wing piece cutting blade 8,
Cut at 8. After cutting, the core metals T, 7 are reversed by 90 degrees, and from that position, extrusion is performed while rotating the core metals 7, 7 again in the S direction. By repeating the above-mentioned operations one after another, left-handed twisted winglets L and right-handed twisted winglets R are alternately formed in the pipe P with their end faces perpendicular to the pipe P, as shown in Fig. 5. Make a mixing stirrer W. After cutting the left-handed winglet L, the extrusion is restarted from the position where the core metals 7, 7 are reversed by 900 degrees to make the right-handed winglet R, so the end face of the left-handed winglet L and the right-handed winglet R are separated. The end faces of are perpendicular. The mixing/stirring device prepared as described above is provided with flanges F as shown in FIG. 6, and a large number of them are connected in series to obtain a desired mixing/stirring ability.

In this case, right-handed twisted winglets R and left-handed twisted winglets L were formed alternately, but it is possible to easily create a series of only right-handed twisted winglets R or left-handed twisted winglets L. It is also free to combine them alternately. (Results of the invention) The present invention (also, by providing a core metal divided into the required number in a die and rotating the core metal, the pipe and the torsion wing pieces can be simultaneously integrated into one body) Since the mixing agitator is formed by extrusion, many man-hours such as making the pipe and twisted wing pieces separately and inserting and gluing the twisted wing pieces into the pipe can be eliminated, and the product can be easily combined with the pipe. It has excellent strength because the torsion wing pieces are integrated and there is no conventional joint surface.
No cracks occur due to differences in shrinkage rate during firing.

In addition, the inner circumferential surface of the pipe and the surface of the twisted blades are smooth because there is no sticking out of adhesive, etc., and the flow of fluid is good, preventing clogging in the vessel, improving mixing and stirring efficiency. Furthermore, by arbitrarily setting the extrusion speed and the rotational speed of the core metal, mixing agitators with various degrees of twist can be obtained, and by changing the number of divisions of the core metal, a mixing agitator with arbitrary twist blades can be obtained. The effects are very large.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a perspective sectional view of main parts, Figs. 3 and 4 are perspective sectional views of other embodiments, and Fig. 5 is a method of the invention. Figure 6 is a perspective view of the mixing agitator with the flange removed, with only the pipes being shown in cross section without the twisted blades.

Claims (1)

[Claims] 1. While rotating the core metal, plastic material is extruded simultaneously from the gap between the core metal and the die and the gap between the opposing core metals to form a right-handed or left-sided twisted wing piece in the pipe. Next, the extrusion is temporarily stopped, the formed twisted wing piece is cut, and the gap between both core metals is twisted to be perpendicular to the cut end face of the twisted wing piece. Extrusion is performed in the opposite direction to form left-handed or right-handed twisted wings whose twist direction is opposite to the previously formed twisted wing pieces, and this process is repeated alternately to form right-handed twisted wings in the extruded pipe. A method for manufacturing a mixing agitator in which a left-handed twisted blade piece is formed integrally with a pipe with their end faces alternately perpendicular to each other. 2 A die is attached to the tip of the nozzle connected to the extrusion processing machine, and inside this die, two core metals with a semicircular cross section are attached to the rotating shaft with a gap maintained and opposite to the axis of the die. A manufacturing device for a mixing agitator, characterized in that a rotating shaft is interlocked with a drive unit that can freely rotate in forward and reverse directions, and a twist blade cutting blade is attached to the end of a core metal so that it can be opened and closed.