JP2005342989A - Ultrasonic vibration applying method and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniformly apply ultrasonic vibration to a molten resin having high viscosity and a high flow speed. <P>SOLUTION: A bending rod 8 is attached to the leading end of the drive horn 5 driven by a vertical vibrator 7 in an inverted T-shape to be arranged in a flow channel 3 and ultrasonic vibration is applied to the molten resin flowing through the flow channel 3 through the bending rod 8. The interval between the inner surface of the flow channel 3 and the outer surface of the bending rod 8 is set to a narrow interval of about 2-5 mm. By this constitution, ultrasonic vibration can uniformly be applied even to the molten resin having high viscosity and a high flow speed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultrasonic vibration application method and apparatus for applying ultrasonic vibration to molten resin flowing in a flow path, and in particular, improves physical properties during pellet production by applying ultrasonic vibration to molten resin. The present invention relates to a method and an apparatus for applying ultrasonic vibration that are suitable for use.

2. Description of the Related Art Conventionally, in sewage treatment systems and the like, processing is performed by applying ultrasonic vibration to a liquid to be treated and slurry.
JP 2002-172389 A

  By the way, in the conventional ultrasonic vibration application device, since the flow velocity of the liquid to be processed or the slurry to be processed is extremely slow and the viscosity is extremely low, ultrasonic vibration can be applied relatively easily. In the case of a molten resin, the flow velocity is extremely fast and the viscosity is high, so if the conventional ultrasonic vibration application device is applied as it is, ultrasonic vibration cannot be transmitted to the entire molten resin flowing in the flow path, When pellets are produced, there is a problem that spots are generated in the physical properties and the quality cannot be stabilized.

  The present invention has been made in view of the present situation, and provides an ultrasonic vibration application method and apparatus capable of applying ultrasonic vibrations evenly even with a molten resin having a high flow rate and high viscosity. With the goal.

  Another object of the present invention is to make it possible to apply ultrasonic vibration evenly to all the molten resin flowing in the flow path even when the flow rate of the molten resin is extremely high.

  Still another object of the present invention is to increase the contact area between the deflection bar and the molten resin without increasing the length of the deflection bar or increasing the flow path area.

  In order to achieve the above object, the present invention is characterized in that a bending rod is disposed in the flow path of the molten resin, and the bending vibration is applied to the bending rod by applying ultrasonic vibration.

  The present invention is also characterized in that the flexible rod is dimensioned so as to have a cross-sectional area similar to that of the flow path and substantially the same as the flow path.

  The present invention is also characterized in that a bending rod is connected to the other end portion of the drive horn to which longitudinal vibration is inputted from one end side, and this bending rod is arranged in the flow path of the molten resin.

  The present invention is further characterized in that irregularities or through holes for expanding the contact area with the molten resin are provided on the outer surface or inside of the bending rod.

  In the present invention, a bending rod is disposed in the flow path of the molten resin, and the bending vibration is caused by applying ultrasonic vibration to the bending rod. Therefore, even if the molten resin has a high flow rate and high viscosity, Ultrasonic vibration can be applied without spots.

  In the present invention, the flexible rod is dimensioned to have a shape similar to that of the flow path and substantially the same cross-sectional area as the flow path. Therefore, even if the flow rate of the molten resin is extremely high, It is possible to apply ultrasonic vibrations evenly to all the molten resin flowing through the.

  In the present invention, a bending rod is connected to the other end portion of the drive horn to which longitudinal vibration is input from one end side, and this bending rod is arranged in the flow path of the molten resin, so that the bending vibration occurs. The entire surface of the flexure bar comes into contact with the molten resin, and the ultrasonic vibration can be applied to the molten resin without unevenness compared to the case where the ultrasonic vibration is directly applied by the drive horn.

  In the present invention, since the unevenness and the through hole for expanding the contact area with the molten resin are provided on the outer surface and inside of the bending rod, the length of the bending rod is increased or the flow passage area is increased. Without doing so, the contact area between the flexible rod and the molten resin can be increased.

The present invention will be described below with reference to the drawings.
1 to 4 show an ultrasonic vibration application device according to a first embodiment of the present invention. The ultrasonic vibration application device 1 includes a case main body 2 having a flow path 3 of molten resin (not shown). And application means 4 that is incorporated in the case body 2 and applies ultrasonic vibration to the molten resin.

  As shown in FIG. 5, the applying means 4 includes a drive horn 5 having a fixing flange 6 at a node position, and a vertical horn that is attached to the upper end of the drive horn 5 in the figure and inputs longitudinal vibration to the drive horn 5. The vibrator 7 is composed of a bending rod 8 having, for example, a square bar shape attached to the lower end portion of the drive horn 5 in the shape of an inverted T.

  On the other hand, the case main body 2 in which the applying means 4 is incorporated is configured by abutting two unit case main bodies 2a and 2b in a halved shape as shown in FIGS. Is provided with a flow path 3 having a flow path inlet 3a and a flow path outlet 3b at both ends, and a lower portion of the drive horn 5 is accommodated on the upper surface and a mounting seat 10 for a fixing flange 6 is provided at the upper end. A support cylinder 9 is provided.

  As shown in FIGS. 3 and 4, the flow path 3 has a similar shape to the bending rod 8, and an interval of about 2 to 5 mm is formed between the outer surface of the bending rod 8. The size is set so as to be substantially the same as the size of the deflection bar 8. As a result, even when the flow rate of the molten resin flowing in the flow path 3 is high, ultrasonic vibration can be reliably applied to the entire amount of the molten resin.

Next, the operation of the present embodiment will be described.
In the ultrasonic vibration applying apparatus 1 shown in FIG. 4, the molten resin flows into the flow path 3 from the flow path inlet 3a, and the molten resin that flows into the flow path 3 flows from the flow path outlet 3b to the outside of the flow path 3. At this time, if the longitudinal vibration 7 is energized and the longitudinal vibration is input to the drive horn 5, the longitudinal vibration is transmitted to the bending rod 8, and the bending rod 8 is bent and vibrated. become.

  6 (a) and 6 (b) show the results of analysis of the bending vibration state of the bending rod 8 using the finite element method. The bending rod 8 as a whole is matched with the longitudinal vibration of the drive horn 5. FIG. It turns out that it is bending and vibrating.

  Thus, when the bending rod 8 bends and vibrates in the flow path 3, the vibration is transmitted to the molten resin flowing in contact with the outer surface of the bending rod 8, thereby applying ultrasonic vibration to the molten resin. It will be.

  By the way, only a narrow space of about 2 to 5 mm is formed between the inner surface of the flow path 3 and the outer surface of the bending rod 8. For this reason, even when the viscosity of the molten resin is high and the flow velocity is high, ultrasonic vibration can be applied to the entire amount of the molten resin flowing in the flow path 3 without any spots.

FIG. 7 shows a second embodiment of the present invention, and a plurality of grooves 11 for expanding the contact area with the molten resin are provided on the outer surface of the flexible rod 8 in the first embodiment. It is what I did.
Other points are the same as those in the first embodiment, and the operation is also the same.

  Thus, since the plurality of grooves 11 are provided on the outer surface of the deflection bar 8, the surface area can be increased without increasing the outer dimension of the deflection bar 8 or increasing the length. . For this reason, ultrasonic vibration can be applied to the molten resin more effectively.

  In addition, even if unevenness other than the groove 11 is provided on the outer surface of the bending rod 8, the same effect as the groove 11 can be obtained. For example, a large number of protrusions may be provided on the entire outer surface of the bending rod 8.

FIG. 8 shows a third embodiment of the present invention, and a plurality of through-holes 21 for expanding the contact area with the molten resin are provided inside the bending rod 8 in the first embodiment. It is intended to be provided.
Other points are the same as those in the first embodiment, and the operation is also the same.

  Thus, since the plurality of through holes 21 are provided inside the bending rod 8, the surface area can be increased without increasing the outer dimension of the bending rod 8 or increasing the length. it can. For this reason, ultrasonic vibration can be applied to the molten resin more effectively.

  In the third embodiment, the case where only the through hole 21 is provided in the bending rod 8 has been described. However, the through hole 21 and the groove 11 shown in FIG. It may be.

  As described above, the ultrasonic vibration application device according to the present invention is useful as a device for applying ultrasonic vibration to a fluid, and is particularly suitable as a device for applying ultrasonic vibration to a molten resin having a high viscosity and a high flow rate. Yes.

1 is an overall configuration diagram showing an ultrasonic vibration application device according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. 1. It is a perspective view which shows the state by which the application means is integrated in the unit case main body. FIG. 4 is a front view of FIG. 3. It is explanatory drawing which shows the structure of an application means. (A), (b) is explanatory drawing which shows the vibration state of the application means shown in FIG. 5 by the analysis result by a finite element method. FIG. 6 is a view corresponding to FIG. 5 showing a second embodiment of the present invention. FIG. 6 is a view corresponding to FIG. 5 showing a third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ultrasonic vibration application apparatus 2 Case main body 2a, 2b Unit case main body 3 Flow path 3a Flow path inlet 3b Flow path outlet 4 Application means 5 Drive horn 6 Fixing flange 7 Vertical vibrator 8 Deflection bar 9 Support cylinder 10 Mounting seat 11 Groove 21 Through hole

Claims (6)

  An ultrasonic vibration applying method, wherein a bending rod is disposed in a flow path of a molten resin, and the bending vibration is applied to the bending rod by applying ultrasonic vibration.   2. The ultrasonic vibration applying method according to claim 1, wherein the bending rod has a shape similar to the flow path and has substantially the same cross-sectional area as the flow path.   An ultrasonic vibration applying device, wherein a bending rod is connected to the other end portion of a drive horn to which longitudinal vibration is inputted from one end side, and the bending rod is disposed in a flow path of a molten resin.   4. The ultrasonic vibration applying device according to claim 3, wherein the bending rod has a shape similar to the flow path and has substantially the same cross-sectional area as the flow path.   The ultrasonic vibration applying device according to claim 3 or 4, wherein the bending rod has irregularities for expanding the contact area with the molten resin on an outer surface thereof.   6. The ultrasonic vibration applying device according to claim 3, wherein the bending rod has a through-hole for expanding the contact area with the molten resin.

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