KR100254396B1 - Conveyor type device poling apparatus - Google Patents

Abstract

PURPOSE: A conveyor type polarization jig is provided to save man hour, enhance productivity and be utilized in a mass production process by performing continuously a polarization process without stopping in air. CONSTITUTION: The conveyor type polarization jig comprises a frame(10), a plurality of leads(12), a plurality of conductive rollers(14), a conveyer(16), a plurality of cabs(20) and an electrode part(18). The frame(10) supports the jig. The plurality of leads(12) are mounted on one end of the frame(10). The plurality of conductive rollers(14) are respectively mounted to one end of the respective leads(12). The conveyer(16) is mounted so that the device is tightly closed to the bottoms of the conductive rollers(14). The plurality of cabs(20) are mounted on the conveyer and have a space for containing and pressing the device. The electrode part(18) applies the external voltage of high electric field to the leads(12) and the conveyer(16).

Description

Conveying element polarizer

The present invention relates to a device for polarization of a ferroelectric piezoelectric ceramic device, and more particularly to a continuous process device polarization device capable of polarizing the device continuously in the air for mass production of the device.

In general, when a uniform electric field is applied between the electrodes of a parallel plate capacitor, the insertion of a dielectric between the electrodes increases the capacitance, that is, the accumulated charge, than the vacuum. This is because the atoms or molecules constituting the dielectric do not coincide with the electrical center of their electrostatic charge (+ e [C]) and the electrical center of the negative charge (-e [C]) by the electric field. This state is called dielectric polarization.

On the other hand, in general dielectrics, polarization is proportional to an externally applied electric field, but in ferroelectrics, polarization and electric field are not proportional to each other and are nonlinear, and are represented by hysteresis curves. In other words, the ferroelectric is spontaneously polarized and is formed of a plurality of minute domains composed of groups of particles having directivity. In each domain, the dipoles of each molecule are arranged in the same direction without any electric field, and are arranged in a disordered direction. However, when an electric field is applied from the outside, neighboring divisions of the divisions facing the electric field direction among them are rotated in the same direction as the electric fields, and these divisions gradually grow to form a single division in the strong electric field. When the movement of a region requires energy and a high electric field surpassing the electric power is applied, the divisions do not return to their original state even if the external electric field is removed, but a residual polarization remains in which the multiple regions remain in the same direction.

As such, the process of applying a high electric field from the outside to give direction to the ferroelectric is called a polarization process. In general, the polarization process applies a high voltage more than a constant power to have residual polarization, The heat treatment process is performed in parallel to reduce the stress. In addition, because the divisional movement is not performed at once but is made over a certain time, it must be maintained for a certain time while applying high voltage and heat from the outside.

In general, the polarization device is composed of a high voltage source that generates a high electric field of constant power or more, a chamber for preventing the temperature rise and leakage current, and a jig for fixing the device.

1 is a schematic diagram schematically showing the structure of a conventional device polarization apparatus, including an electrode part 2 for applying a high voltage source of a high voltage source, not shown, inside a chamber 5 installed to prevent a temperature increase and a leakage current; It consists of the jig frame 3, the support of the element 1, and the lead part 4 for applying a high electric field to the front surface of the element 1. As shown in FIG. The lead portion 4 is configured to have elasticity in the vertical direction in order to facilitate the support and electrical contact of the element 1.

The conventional device polarization device performs the polarization process while filling the chamber 5 with insulating oil and dipping a jig therein. Usually, a polarization process is performed by applying an electric field in a state in which less than a few dozen elements 1 are fixed at a time.

As such, a method of polarizing the jig in the insulating oil in the chamber 5 has to be performed after the polarization of the insulating oil cleaning process. Thus, a technique for performing the polarization process in the air has been developed as a simplification method.

On the other hand, in the case of polarization in air, a leakage current is generated under normal atmospheric pressure. To solve this problem, the chamber 5 must be pressurized and maintained above a predetermined pressure.

However, in the conventional device polarization device, in order to perform one time polarization process, the polarization device must be stopped and the device 1 is inserted into each of the lead portions 4, and the polarization is performed even after the device 1 has been polarized. It is very inconvenient in the mass production process that requires a large amount of devices (1) because the device must be stopped and the polarized device (1) must be collected, and the production speed is very low.

In particular, since a new temperature raising and pressing process must be performed in the chamber 5 every time the polarization is performed, there is a disadvantage in that mass productivity is poor.

Accordingly, an object of the present invention is to provide a transfer polarization apparatus capable of continuously proceeding the device polarization process in air, which is suitable for mass production process for producing a large amount of devices.

The present invention for realizing the above object is a frame for supporting the jig; A plurality of lead portions installed at one end of the frame; A conductive roller installed at an end of each lead portion; A transfer unit installed so that the element can be continuously transported below the conductive roller, a cap provided with a space in which the element is embedded and pressurized, and an external voltage of a high electric field in the lead unit and the transfer unit. It provides a transfer element polarization device consisting of an electrode portion electrically connected to apply.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is a schematic diagram schematically showing the structure of a conventional device polarization apparatus;

Figure 2 is a schematic diagram schematically showing the structure of the transfer element polarization device according to the present invention.

<Explanation of symbols for main parts of drawing>

10; Frame 12; Reid

14; Roller 16; Conveying part

18; Electrode portion 20; Cab

22; Electrode surface (lower) 24; Electrode side (upper)

26; Elastomer

Hereinafter, a device polarization apparatus according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram schematically showing the structure of the device polarization device according to the present invention.

As shown, the present invention comprises a frame 10, a lead portion 12, a conductive roller 14, a transfer portion 16, a cap 20 and an electrode portion 18.

The frame 10 supporting the jig is fixedly installed in the horizontal direction, and a plurality of lead portions 12 are arranged at one end of the frame 10 at regular intervals.

At the end of each lead portion 12 is provided a rotatable conductive roller 14. In addition, the lead portion 12 is installed to have elasticity of a predetermined length in the vertical direction so as to give elasticity to the conductive roller 14 in the vertical direction.

The transfer unit 16 is spaced apart from the lower portion of the plurality of conductive rollers 14 by a predetermined distance so as to sequentially pass through the plurality of rollers 14.

On the other hand, a cap 20 containing the element 1 to be subjected to the polarization process at a predetermined interval is mounted on the transfer unit 16. The cap 20 may form a closed space to maintain a pressure higher than atmospheric pressure by pressurization. In particular, electrode surfaces 22 and 24 are formed on upper and lower caps 20, respectively, and are connected to lead wires so that voltage can be applied to the element 1 present in the cap 20.

Meanwhile, the electrode surface 22 and the upper portion of the element 1 are made of a conductive metal so that the element 1 embedded in the cap 20 can be stably contacted between the conductive roller 14 and the transfer part 16. However, the conductive metal is preferably made of an elastic body 26 having an elastic force.

On the other hand, the lead portion 12 and the transfer portion 16 is provided with an electrode portion 18 is electrically connected to apply an external voltage of a high electric field, the electrode portion 18 is not shown in the figure It is electrically connected to a high voltage source that generates a high field.

Hereinafter, the operation and effects of the present invention will be described.

When a high voltage is applied through the electrode unit 18, a high electric field is formed between the roller 14 and the transfer unit 16 connected to the lead unit 12.

The conveyance part 16 is continuously conveyed toward the direction in which the lead part 12 is arrange | positioned, keeping a constant space | interval with the roller 14.

On the other hand, the element (1) in the cap 20 is pressed to suppress the generation of leakage current during the polarization process in the air to maintain a pressure higher than the atmospheric pressure. In addition, the device 1 is in contact with the electrode surface 24 and a lower portion thereof, and the upper portion is connected to the electrode surface 22 via an elastic body 26 made of a conductive metal.

When the cap 20 pressurized is placed on the upper surface of the transfer part 16, the cap 20 having the element 1 embedded therein is transferred to the transfer part 16 with the electrode surface 24 installed at the bottom thereof electrically connected to the transfer part 16. And passes through the bottom of the first roller 14 is located.

At this time, a high electric field is generated in the element 1 while the electrode surface 22 provided on the cap 20 is in contact with the roller 14. On the other hand, the lead portion 12 is elastically moved so that the outer circumferential surface of the roller 14 can be stably contacted with the element 1 to maintain the contact state at an appropriate pressure.

In this state, the element 1 is rotated in the same direction as the electric field by rotating the neighboring branch of the branch which is directed in the electric field direction among the internal domains, so that such branch gradually grows and eventually all form a single branch. do.

On the other hand, when the cap 20 incorporating the first element 1 passes through the second lead portion 12, the cap 22 incorporating the second element 1 passes through the first lead portion 12. The operation and the polarization process of the device 1 are the same as described above. As such, after one element 1 has completely passed through the plurality of lead portions 12, the divisions of the element 1 do not return to their original state even if the external electric field is removed. Residual polarization is left to complete the polarization process.

As described above, the device polarization device according to the present invention does not need to stop the polarization device to supply devices during the polarization process while continuously supplying devices, and to collect the polarized devices even after the polarization process is completed. There is no need to stop the polarizer, which is advantageous for mass production.

In particular, the temperature increase and pressurization process is simplified by employing a cap 20 capable of embedding only the element 1 instead of the chamber in which the conventional jig itself is incorporated.

In the above description, it should be understood that those skilled in the art can make modifications and changes to the present invention without changing the gist of the present invention as it merely illustrates a preferred embodiment of the present invention.

As described above, according to the transfer device polarization device of the present invention, the polarization process can be continuously performed in the air without interruption, thereby reducing the time required for labor and production, and can be applied to the mass production process for mass production of devices. It can bring an effect.

Claims (4)

A frame supporting the jig; A plurality of lead portions installed at one end of the frame; A conductive roller installed at an end of each lead portion; A transfer part installed to continuously transfer an element below the conductive roller; A cap which is provided with a space to pressurize and install an element on the transfer part; And a lead unit and an electrode unit electrically connected to the transfer unit to apply an external voltage of a high electric field. The method of claim 1, The cap is formed in a sealed space so as to maintain a pressure higher than atmospheric pressure by the pressurized device polarization device, characterized in that installed. The method of claim 2, Electrode surfaces are formed on the upper and lower caps, respectively, and are connected to lead wires so as to apply a voltage to an element existing in the cap. The method of claim 1, And a conductive metal having elastic force is provided between an upper surface of the device and an electrode surface located above the cap.

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