JP2001314094A - Mold to transfer object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold which can transfer an object in a desired direction by using acoustic vibration control material. SOLUTION: This mold is used for transferring the object arranged on the surface of the mold in a constant direction. In the material of the mold, a plurality of high elasticity fibers are regularly oriented and arranged in the same direction. The orientation direction of the fibers has characteristically an angle to the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article capable of driving the movement of an article using controlled acoustic vibration. The molded article of the present invention can be used in the fields of various processing machines, ultrasonic motors, automobile parts, electric appliances and the like.

[0002]

2. Description of the Related Art As a mechanical vibrator, an electromagnetic vibrator based on an electromagnetic effect and a piezoelectric vibrator based on a piezoelectric effect are known. However, a piezoelectric vibrator can be downsized compared to an electromagnetic vibrator. In this case, a piezoelectric vibrator is widely used instead of an electromagnetic vibrator. The application fields of piezoelectric vibrators are wide, such as underwater sonar, fish finder, flaw detector, thickness gauge, flow meter, liquid level gauge,
It is used for viscometers, delay lines, mechanical filters, washing machines, atomizers, welding machines, cutting machines, ultrasonic motors, and the like.

FIG. 7 shows a general configuration of a conventional piezoelectric vibrator. The piezoelectric vibrator 10 of FIG. 7 has a configuration in which a piezoelectric ceramic 1 is bonded to a phosphor bronze (elastic body) 2 with an adhesive.

[0004]

However, in the conventional piezoelectric vibrator, even if an attempt is made to excite only a desired vibration mode, unnecessary vibration having a natural frequency close to the desired vibration mode is also taken out. Problem.

[0005] The present invention utilizes an acoustic vibration control material,
It is an object of the present invention to provide a molded article capable of driving movement of an article in a desired direction.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a molded article for moving an article disposed on the surface of a molded article in a predetermined direction, wherein the molded article comprises a plurality of highly elastic fibers in a base material. Are arranged regularly in the same direction, and the orientation direction of the high-elasticity fiber is at an angle to the surface. It is preferable that a piezoelectric vibrator is laminated on the molded article of the present invention.

The present invention is also a molded article for moving an article disposed on the surface of the molded article in an annular direction, wherein the molded article has a plurality of highly elastic fibers in a base material along the surface. There is also a molded article that drives the movement of an article, which is characterized in that the article is regularly orientated by changing the angle sequentially. It is preferable that a piezoelectric vibrator is laminated on the molded article of the present invention.

Preferred embodiments of the molded article of the present invention are as follows. (1) A plurality of high elasticity fibers are arranged in the base material in parallel with each other. (2) The base material is a resin or a carbonized resin. (3) The base material contains a piezoelectric material. (4) The tensile modulus of the high modulus fiber is 100 GPa or more. (5) The tensile modulus in the fiber direction of the composite material is at least twice the tensile modulus in the direction perpendicular to the fibers. (6) The high elasticity fiber is a carbon fiber or a carbon-containing fiber.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the structure of a piezoelectric vibrator in which an acoustic vibration control material and a piezoelectric vibrator are combined. In FIG. 1, reference numeral 11 denotes a polarized piezoelectric ceramic element (piezoelectric vibrator), and the polarization direction is the direction indicated by the arrow in the figure. Silver electrodes are baked on both sides of the piezoelectric ceramic element. Number 12 indicates that the density is 1.
1 shows a carbon fiber-reinforced plastic molded body using a polyamide resin as a base material, in which carbon fibers of a reinforced base material having a tensile modulus of 8 g / cm ³ and a tensile modulus of 240 GPa are oriented in one direction. The density of the base plastic is 1.5 g / cm ³ .

The tensile modulus in the fiber direction of the carbon fiber reinforced plastic molded article (anisotropic composite material) shown in FIG. 1 is 120 GPa, and the tensile modulus in the direction perpendicular to the fiber is 10 GPa. The piezoelectric ceramic element of No. 11 and the carbon fiber reinforced plastic molding of No. 12
The piezoelectric vibrator 10 is bonded and integrated using an epoxy-based adhesive.

Wiring is applied to the piezoelectric vibrator as shown in FIG. 1, and a high-frequency voltage is applied. When a high-frequency voltage is applied to the piezoelectric vibrator, the piezoelectric ceramic elements arranged on both sides of the carbon fiber reinforced plastic molded body expand and contract in the same phase. The piezoelectric vibrating body 10 can perform expansion and contraction vibration in the X, Y, and Z directions, and it is difficult to excite bending vibration. The admittance characteristics of the piezoelectric vibrator having the structure shown in FIG. 1 were measured by an impedance analyzer. According to measurements, almost 88.8KHz and 1.5M
There was a resonance response near Hz. As a result of measuring the vibration displacement of the vibration at a natural frequency obtained by an impedance analyzer, stretching vibration in the Y direction and the Z direction was confirmed.

Next, when the vibration was analyzed by the finite element method, the resonance frequency of the primary longitudinal vibration in the X direction was about 54.1K.
Hz, and the resonance frequency of the primary longitudinal vibration in the Y direction is about 8
1.2 KHz, and the Z direction was about 1.4 MHz. However, at the resonance frequency of about 54.1 KHz of the primary longitudinal vibration in the X direction obtained by the finite element method, no resonance response was present in the vicinity of the admittance characteristic measured by the impedance analyzer. There was no resonance response in the measurement of vibration displacement.

In the carbon fiber reinforced composite material in which carbon fibers are oriented in the X direction as shown in FIG. 1, longitudinal vibration in the X direction is suppressed, and vibration in the Y direction is strongly excited. Further, when it is necessary to improve the elastic modulus of the carbon fiber composite material in order to manufacture the piezoelectric vibrator 10 with less mechanical loss,
There is also a method of heat-treating a carbon fiber composite material to carbonize a resin portion.

In FIG. 1, the piezoelectric ceramic vibrator is used as the vibration source. However, even when another vibration source is used, unnecessary vibration can be suppressed by using the acoustic vibration control material of the present invention.

In FIG. 1, although the structure and dimensions are the same as those of the piezoelectric vibrator, the orientation direction of the carbon fibers of the carbon fiber composite material may be the Y direction. The admittance characteristics of this piezoelectric vibrator were determined by an impedance analyzer. According to the measurement result, about 53.5KHz, about 1.5M
Hz has a large resonance response, and about 86.5 KHz has a small resonance response. As a result of measuring the vibration displacement, about 53.
Vibration in X direction increases at 5KHz, about 1.5MHz
, The vibration in the Z direction increased, and the vibration in the Y direction was very small even at about 86.5 KHz. Thus, in the carbon fiber composite material in which the carbon fibers are oriented in the Y direction, the vibration in the Y direction can be largely suppressed.

The configuration shown in FIG. 1 clearly shows that the vibration can be controlled by aligning the directions of the carbon fibers of the carbon fiber composite material.

Next, an example of the configuration of the molded article according to the present invention will be described.
This will be described with reference to FIG. In FIG. 2, the piezoelectric ceramic plate 11 is bonded to the carbon fiber composite material 14 in which the orientation direction of the carbon fibers 18 is inclined at 45 degrees with respect to the horizontal using an epoxy-based adhesive to form the piezoelectric vibrator 10. When a high-frequency voltage close to the resonance frequency in the thickness direction was applied to the piezoelectric vibrator 10, the object placed on the carbon fiber composite material moved to the left. This movement is thought to be due to strong excitation of vibration in the direction of the arrow perpendicular to the direction of orientation of the carbon fibers.

From the example shown in FIG. 2, by aligning the orientation directions of the fibers in the carbon fiber composite material, the vibration direction can be controlled.
It can be seen that the object placed on the carbon fiber composite material can be moved.

The present invention is not limited to the above embodiment, but can be variously modified within the scope of the invention.

Further, the molded article of the present invention may be configured as shown in FIGS. 3 and 4. FIG. 3 is a plan view, and FIG. 4 is a side view. In this example,
The orientation direction of the carbon fibers 18 in the disk-shaped carbon fiber composite material is inclined by 15 degrees with respect to a straight line passing through the center of the disk.
The piezoelectric ceramic element 11 was bonded to the carbon fiber composite material 15 to obtain a piezoelectric vibrator 10. When a high frequency voltage having a resonance frequency of the radial vibration of the piezoelectric vibrator 10 was applied, the piezoelectric vibrator 10 vibrated in a direction indicated by an arrow in FIG. This indicates that the vibration mode can be changed depending on the direction of the fiber.

Next, the configuration of FIG. 5 will be described. In FIG.
SiC fiber composite material 16 in which SiC fiber is used as a reinforcing base material and the base material is an epoxy resin containing PZT powder.
The fibers are unidirectionally oriented. The fiber directions of this elastic composite material were aligned in the X direction and the Y direction, respectively, and were alternately stacked into 10 layers. Si with fibers oriented in X direction
The C fiber composite material (elastic composite material) is 16A, and the SiC fiber composite material in which the fibers are oriented in the Y direction is 16B. Gold was vapor-deposited on both surfaces of the composite material having a laminated structure of 10 layers, and then a direct voltage was applied to perform poling.

In this way, a piezoelectric vibrator in which the elastic composite material and the piezoelectric ceramic were integrated was manufactured. When the admittance characteristic of the piezoelectric vibrator was measured, it was confirmed that the vibration in the Z direction was strongly excited. Thus, it was possible to provide a vibration control material capable of suppressing vibration in the XY plane and strongly exciting vibration in the Z direction.

FIG. 6 will be further described. Piezoelectric ceramic plates 1 are provided on both sides of a thin plate 12 made of a carbon fiber composite material.
1 were bonded with an adhesive to produce a piezoelectric bimorph vibrator 17. The polarization direction of the piezoelectric ceramic plate 11 is the thickness direction. Next, electrical wiring was performed as shown in the figure, and a high-frequency voltage having a resonance frequency of the bimorph vibrator 17 was applied thereto. As a result, it was confirmed that bending vibration was strongly excited. The admittance characteristics were measured, and the electromechanical coupling coefficient at the natural frequency of the bending vibration was about 0.2, which was equal to or higher than the case where iron or aluminum was used as the elastic body.

The effect of the acoustic vibration control material shown in FIG. 6 is that the vibration is controlled in the fiber direction, which is considered to be that the expansion and contraction vibration that changes the fiber length is suppressed. . Therefore, since the fiber length in the composite material of the bending vibration of the bimorph vibrator in FIG. 6 does not change, it is strongly excited without being suppressed.

[0026]

By using the acoustic vibration control material (elastic body) made of the fiber reinforced composite material of the present invention, acoustic vibration is suppressed in the length direction of the high elastic fiber in the composite material,
Acoustic vibration is strongly transmitted in a direction orthogonal to the length direction of the high elastic fiber. Therefore, in the present invention, it is possible to provide a molded body that drives the movement of various articles in a desired direction by utilizing the effects of the acoustic vibration control material.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an example of a configuration of a piezoelectric vibrator.

FIG. 2 is a side sectional view showing an example of a formed body (piezoelectric vibrating body) according to the present invention.

FIG. 3 is a plan view showing an example of a molded body (piezoelectric vibrating body) according to the present invention.

FIG. 4 is a side view of the piezoelectric vibrator of FIG. 3;

FIG. 5 is a side sectional view showing an example of the configuration of a piezoelectric vibrator.

FIG. 6 is a side view showing a bimorph piezoelectric vibrator.

FIG. 7 is a perspective view illustrating a schematic configuration of a conventional piezoelectric vibrator.

[Explanation of symbols]

 Reference Signs List 10 piezoelectric vibrator 11 carbon fiber reinforced composite material (composite material plate) 12 piezoelectric ceramic element 14 carbon fiber reinforced composite material 15 carbon fiber reinforced composite material 16 SiC fiber composite material 17 piezoelectric bimorph vibrator 18 carbon fiber

Claims (10)

[Claims] 1. A molded body for moving an article arranged on the surface of a molded body in a certain direction, wherein the molded body has a plurality of highly elastic fibers in a base material regularly in the same direction. A molded article for driving the movement of the article, wherein the oriented direction of the highly elastic fiber is at an angle to the surface. 2. A molded article according to claim 1, wherein the molded article is made of a composite material in which a plurality of high elastic fibers are respectively arranged in parallel with each other in a base material. 3. A molded article for moving an article arranged on the surface of the molded article in an annular direction, wherein the molded article is formed by a plurality of highly elastic fibers in a base material having an angle sequentially along the surface. A molded body for driving the movement of an article, characterized in that the article is regularly oriented and changed. 4. The molded article according to claim 1, wherein the base material is a resin. 5. The molded article according to claim 1, wherein the base material is a carbonized resin. 6. The piezoelectric device according to claim 1, wherein the base material includes a piezoelectric material.
The molded article according to any one of Items 3 to 3. 7. The high modulus fiber has a tensile modulus of 100 GPa.
The molded article according to any one of claims 1 to 6, which is as described above. 8. The molded article according to claim 1, wherein the tensile modulus of the composite material in the fiber direction is at least twice the tensile modulus in the direction perpendicular to the fibers. 9. The molded article according to claim 1, wherein the high elasticity fiber is a carbon fiber or a carbon-containing fiber. 10. A molded body for driving movement of an article comprising a piezoelectric vibrator laminated on the molded body according to any one of claims 1 to 9.