KR101770139B1 - Hot extrusion device of thermo-electronic material having ability for seebeck coefficient continuous measurement - Google Patents

Abstract

The present invention relates to a hot extrusion apparatus capable of continuously measuring a Seebeck coefficient of a thermoelectric material, comprising: a mold unit (10) receiving an extruded material (A) to heat the same at a setting temperature; a plurality of forming units (20) to form the extruded material (A) extruded by the mold unit (10) into a shape suitable to the final product; a cutting unit (30) to cut the extruded material (A) formed by the forming unit (20) into a length suitable to the final product; a detection unit (40) to detect a temperature difference and a potential difference of the extruded material (A) before cut of the cutting unit (30); a classification unit (50) receiving an output signal of a control unit (60) to classify the extruded material of a bad state among the extruded material (A); and the control unit (60) receiving temperature and potential difference output signals of the detection unit (40) to continuously measure the Seebeck coefficient of the extruded material (A) before the cut of the cutting unit (30), and to output an operation signal to the cutting unit (30) and the classification unit in accordance with a result determining good and bad states of the extruded material (A). Accordingly, the Seebeck coefficient of the extruded material is continuously detected in an extrusion process by the hot extrusion apparatus to determine the good or bad state of the extruded material, thus reducing work load and work manpower in accordance with performance determination of the extruded material; thereby being able to manufacture a thermoelectric material of a good quality the least cost.

Description

Technical Field [0001] The present invention relates to a hot extrusion device capable of continuously measuring a Seebeck coefficient of a thermoelectric material,

The present invention relates to a hot extrusion apparatus for extruding a metal alloy into a desired shape at a high temperature, and more particularly, to a hot extrusion apparatus capable of continuously measuring a Seebeck coefficient in the process of forming an extruded material by a hot extrusion apparatus.

Generally, a thermoelectric material is an alloy containing components such as bismuth (Bl), tellurium (Te) and antimony (Sb). The thermoelectric material has a Seebeck effect in which electromotive force is generated at both ends, Peltier) and Thomson effect (Tomson) to convert thermal energy into electrical energy or electrical energy into thermal energy.

The thermoelectric material having the above-described characteristics has conventionally been molded by a conventional casting method, a pressure sintering method, or a hot pressing method. However, the casting method has a disadvantage of lowering the yield and increasing the manufacturing cost. In the pressure sintering method and the hot- It is difficult to control the characteristics and extrusion method is widely used in recent years.

Since the extrusion method is a method of molding a thermoelectric material with a large plastic stress in comparison with the conventional casting method, sintering method, or hot pressing method, it has an advantage that density and anisotropy of microstructure can be increased. Especially, And it is widely used.

Here, in order to effectively manage the quality of the extruded material formed by the hot extrusion method, it is indispensably required to determine whether the extruded material is in a correct state through a measurement method such as electric conductivity or a Seebeck coefficient.

However, in order to measure the material performance of the extruded material, The electric conductivity and the Seebeck coefficient are measured by processing the extruded material into a square pillar shape or a cylindrical shape and applying power to both ends of the molded product so that the working load and the working process according to the performance measurement of the extruded material are increased The productivity is lowered.

Therefore, there is an urgent need to increase productivity by improving the workability of the extruded material produced by the hot extrusion method.

KR 10-1470197 B1 KR 10-2002-0096490 A

In order to solve the above problems, the present invention provides a method for continuously measuring the heat resistance of a thermoelectric material for continuously measuring the heat resistance of the extruded material by the hot extrusion apparatus, And an object of the present invention is to provide an extrusion apparatus.

According to an aspect of the present invention, there is provided a mold assembly comprising: a mold unit for accommodating an extruded material and heating the extruded material to a set temperature; A plurality of molding parts for molding the extruded material extruded by the mold part into a shape suitable for the final product; A cutting portion for cutting the extruded material formed by the forming portion into a length suitable for the final product; A sensing unit that senses a temperature difference and a potential difference of the extruded material before being cut by the cutting unit; A classifying unit which receives an output signal of the control unit and classifies an extruded material in a defective state among the extruded materials; And a control unit for receiving the temperature difference and the potential difference output signal of the sensing unit and continuously measuring the bending coefficient of the extruded material before cutting by the cutting unit to determine a good state and a defective state, And a control unit for outputting an operation signal to the cutting unit and the sorting unit.

As described above, the present invention includes at least the following effects.

First, during the extrusion process by the hot extrusion apparatus, the bake factor of the extruded material is continuously detected to determine the amount of the extruded material, so that the work load and the work flow according to the performance judgment of the extruded material are reduced, Can be manufactured at a minimum cost.

Second, the extrusion of the hot extrusion apparatus can increase the density and induce the fineness of the crystal grains, thereby manufacturing a product having excellent thermoelectric properties due to the anisotropy of the microstructure along the extrusion direction of the extrusion material.

Thirdly, by extruding the metal alloy material in a powder state into the hot extruding device and continuously extruding it, mass production of the extruded material becomes possible, thereby reducing the manufacturing cost and improving the product quality and improving the reliability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a hot extrusion apparatus capable of continuous measurement of the Seebeck coefficient of a thermoelectric material according to the present invention. FIG.

Hereinafter, an embodiment according to the present invention will be described.

As shown in FIG. 1, the mold unit 10 accommodates the extruded material A and heats it to a set temperature; A plurality of molding portions 20 for molding the extruded material A extruded by the mold portion 10 into a shape suitable for the final product; A cutting portion 30 for cutting the extruded material A formed by the forming portion 20 into a length suitable for the final product; A sensing unit 40 sensing a temperature difference and a potential difference of the extruded material A before being cut by the cutting unit 30; A classifying unit (50) for classifying the extruded material of the extruded material (A) in a poor state by receiving an output signal of the controller (60); And a control unit that receives the temperature difference of the sensing unit (40) and the potential difference output signal and continuously measures the bake stress coefficient of the extruded material (A) before cutting by the cutting unit (30) And a control unit (60) for outputting an operation signal to the cutting unit (30) and the sorting unit (50) in accordance with a result of determination of the good state and the defective state.

The hot extrusion apparatus 1 according to the present invention includes a molding unit 10, a molding unit 20, a cutting unit 30, a sensing unit 40, a sorting unit 50, and a control unit 60, In particular, in the extrusion process of the hot extrusion apparatus 1, the material performance of the extruded material A, for example, the Seebeck coefficient is continuously evaluated to rapidly remove the defective product.

The mold part 10 is for heating the extruded material A to a temperature suitable for extrusion and includes a main body 12 for accommodating the extruded material A and a peripheral surface of the main body 12 And the extruded material A is suitably extruded at an extrusion temperature of 380 to 450 캜.

In this case, when the extrusion temperature of the mold part 10 is 380 ° C or lower, the solubility of the extruded material A is lowered and the rate of rejection is high. When the extrusion temperature is 450 ° C or higher, A decision is made about the decision.

The extruded material (A) is a metal alloy material containing Bi-Te. The metal alloy material is pulverized to a size of 20 to 50 탆 and compacted, and then sintered to produce a lump, (10).

Of course, in the process of forming the mold part 10, although not specifically shown in the means for charging the extruded material A, if the main body 12 and the heater 14 are constituted, Included is obvious.

The molding part 20 is to mold the extruded material A to be extruded from the mold part 10 into a shape suitable for the final product and to form the extruded material A, A roller 22 and a lower roller 24. [

At this time, it is natural that the shape of the extruded material A is determined according to the shape of the outer peripheral surface of the upper / lower rollers 22, 24.

The cutting unit 30 cuts the extruded material A that is extruded and molded by the forming unit 20 to a length suitable for the final product. The cut unit 30 includes a guide 32 and a cutter 34, an extrusion speed measuring device 36, an actuator 37, and a cutting speed controller 38 are coupled to each other.

At this time, the guide 32 functions to guide the movement route of the cutter 34 that selectively cuts the extruded material A, and in particular, the cutter 34 is operated by a solenoid .

The extrusion speed measuring unit 36 is configured to measure the extrusion speed of the extruded material A molded into a cylindrical shape and a polygonal shape by the molding unit 20 in a state of being provided at the discharge port of the molding unit 20 And performs a sensing function.

The cutting speed controller 38 receives the signal from the extrusion speed meter 36 and adjusts the operation speed of the actuator 37.

In addition, the actuator 37 selectively moves the cutter 34 forward and backward.

At this time, the unexplained reference numeral "35" is a speedometer for visually checking the speed of the extrusion speed meter 36.

The sensing unit 40 continuously senses the temperature difference and the potential difference of the extruded material A before being cut by the cutting unit 30 and continuously outputs the pair of the upper temperature sensor 42 and the lower temperature sensor 44 And the spring electrodes 46 of the first and second electrodes are mutually coupled.

The upper temperature sensor 42 continuously senses the temperature of the extruded material A located on the outlet side of the mold unit 10.

The lower temperature sensor 44 continuously senses the temperature of the extruded material A located at the inlet side of the forming unit 20.

The pair of spring electrodes 46 are in contact with the respective measurement points of the upper temperature sensor 42 and the lower temperature sensor 44 so as to contact the upper temperature sensor 42 and the lower temperature sensor 44, V by the temperature difference DELTA T of the capacitor C2.

The classifying unit 50 receives the output signal of the controller 60 and removes the extruded material A in a defective state and contacts the extruded material A cut by the cutter 30 And an ejector 54 for pressing the signal of the proximity switch 52 and pushing the extruded material in the defective state to the waste disposal site B. [

At this time, reference numeral 56 denotes an actuator for operating the ejector 54.

The control unit 60 receives the temperature difference of the sensing unit 40 and the potential difference output signal and continuously measures the bekking coefficient of the extruded material A before cutting by the cutting unit 30 to determine the good state and the bad state do.

The control unit 60 determines whether the sensing unit 40 senses the temperature difference between the discharge portion of the mold unit 10 at a high temperature state and the temperature of the inflow portion of the molding unit 20 at a low temperature state, The temperature difference DELTA T between the lower temperature sensor 44 and the lower temperature sensor 44 and the potential difference DELTA V between the pair of spring electrodes 46 due to the temperature difference are used to continuously measure the Seebeck coefficient

The control unit 60 outputs an operation signal to the cutting unit 30 and the sorting unit 50 in accordance with the result of determination of the good state and the bad state of the extruded material A, As a result, when the extruded material A is determined to be in a defective state, the cutting speed of the cut portion 30 is adjusted and an operation signal is output to the classifying portion 50.

Hereinafter, the operation according to the present invention will be described.

In order to extrude the extruded material A using the hot extrusion apparatus 1 according to the present invention, once the extruded material A is charged into the mold part 10 and the temperature of the body 12 Should be set in the range of 380 ~ 450 ℃.

Then, when the hot extrusion apparatus 1 is operated, the extruded material A is discharged by the mold unit 10, and at the same time, by the upper temperature sensor 42 and the lower temperature sensor 44 The temperature difference between the two points of the extruded material is measured and the result of detecting the potential difference of the pair of spring electrodes 46 by the measured temperature difference is used to continuously measure the Seebeck coefficient by the controller 60.

That is, at the stage before the extrusion material A of the mold part 10 is supplied to the forming part 20, the upper temperature sensor 42, the lower temperature sensor 44, the pair of spring electrodes 46 The material performance of the extruded material A, such as the Seebeck coefficient, is measured by the controller 60, and it is quickly judged whether the defect and the goodness are good or not will be.

The extruded material A to be molded in the forming part 20 is pressed against the cut part 30 in a state in which the extrusion speed is measured by the extrusion speed measuring device 36 mounted on the outlet side of the forming part 20 To a desired length.

The extruded material A cut by the cut portion 30 may be separated from the extruded material A by the controller 60 because the material performance of the extruded material A, (B) or place of use (C).

At this time, when the control unit 60 determines that the extruded material A is good, it is classified as the use place C and the control unit 60 determines that the extruded material A is bad Place (B).

Particularly, when it is determined that the extruded material A is defective, the ejector 54 receiving the signal of the proximity switch 52 is operated, and at the same time, the cutter 30 Is controlled.

Therefore, in the process of extruding the extruded material A, the controller 60 determines the defective state or the good state of the extruded material A, whereby the material performance of the extruded material A, The convenience of inspection is improved.

The present invention is not limited to the above-described embodiments, and various modifications and changes may be made without departing from the spirit and scope of the invention as defined in the following claims. To the extent that any person with the knowledge of the present invention can make various changes.

1: hot extrusion apparatus A: extruded material
10: Mold part 12: Body
14: heater 20: molding part
30: Cutting section 32: Guide
34: Cutter 35: Speedometer
36: Extrusion speed meter 37: Actuator
38: Cutting speed regulator 40:
42, 44: upper / lower temperature sensor 46: spring electrode
50: Classification unit 52: Proximity switch
54: Ejector 56: Actuator
60:

Claims (5)

A mold unit 10 for receiving the extruded material A and heating the extruded material A to a setting temperature;
A plurality of molding portions 20 for molding the extruded material A extruded by the mold portion 10 into a shape suitable for the final product;
A cutting portion 30 for cutting the extruded material A formed by the forming portion 20 into a length suitable for the final product;
A sensing unit 40 sensing a temperature difference and a potential difference of the extruded material A before being cut by the cutting unit 30;
A classifying unit (50) for classifying the extruded material of the extruded material (A) in a poor state by receiving an output signal of the controller (60); And
The temperature difference of the sensing unit 40 and the potential difference output signal are received and the debonding coefficient of the extruded material A is successively measured before cutting by the cutting unit 30 to determine the good state and the bad state, A control unit (60) for outputting an operation signal to the cutting unit (30) and the sorting unit (50) according to a result of determination of a good state and a defective state of the cutting unit (30);
And,
The sensing unit (40)
An upper temperature sensor (42) for sensing an outlet temperature of the mold part (10);
A lower temperature sensor 44 for sensing an inlet side temperature of the forming part 20;
A pair of springs which are in contact with respective measuring points of the upper temperature sensor 42 and the lower temperature sensor 44 to sense a potential difference between the upper temperature sensor 42 and the lower temperature sensor 44, An electrode 46;
And,
The control unit 60
The temperature difference between the upper temperature sensor 42 and the lower temperature sensor 44 and the potential difference between the pair of spring electrodes 46 due to the temperature difference, Wherein the measured value of the Seebeck coefficient is continuously measured using the result of sensing the Seebeck coefficient of the thermoelectric material. The cutting apparatus according to claim 1, wherein the cutting unit (30)
A cutter (34) mounted on an extrusion path of the extruded material (A) and selectively operated by an actuator (37);
An extrusion speed measuring device 36 for sensing an extrusion speed of the extruded material A to be formed by the forming part 20; And
A cutting speed controller 38 for receiving a signal from the extrusion speed measuring device 36 and outputting an operation signal and a return signal to the actuator 37;
Wherein the thermoelectric material is a thermo-extruded material. The apparatus according to claim 1, wherein the classifying section (50)
A proximity switch (52) for detecting the position of the extruded material (A) cut by the cut portion (30); And
An ejector 54 for pressing the signal of the proximity switch 52 to push the extruded material A in a defective state to the waste disposal site B;
Wherein the thermoelectric material is a thermo-extruded material. The method according to claim 1, wherein the extruded material (A)
The alloy material including Bi-Te is pulverized to a size of 20 to 50 占 퐉 to be compacted and sintered, and then extruded from the mold part 10 at a temperature range of 380 to 450 占 폚. Hot extrusion device capable of continuously measuring the Seebeck coefficient. delete

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