WO2016093403A1

WO2016093403A1 - Screw pneumatic copper powder application apparatus

Info

Publication number: WO2016093403A1
Application number: PCT/KR2014/012230
Authority: WO
Inventors: 이종선; 이정권; 현승민; 김베로
Original assignee: 주식회사 탑피온
Priority date: 2014-12-11
Filing date: 2014-12-11
Publication date: 2016-06-16

Abstract

The screw pneumatic copper powder application apparatus according to the present invention comprises: a powder supply unit (10), through the top open space of which copper powder is supplied; an operating unit (20) disposed at one side under the powder supply unit (10); a powder transfer unit (30) connected to each of the powder supply unit (10) and the operating unit (20); a powder jet unit (40) for discharging the supplied copper powder while connected to the powder transfer unit (30); a nozzle tank (50), which is a space from which the copper powder discharged from the powder jet unit (40) is sprayed; and a pneumatic regulator (60) for precisely controlling pneumatic pressure while connected to the powder jet unit (40), wherein the powder transfer unit (30) transfers the copper powder supplied from the powder supply unit (10) to the powder jet unit (40) by using a screw rotation mode.

Description

Copper Powder Screw Pneumatic Applicator

The present invention relates to a copper powder screw pneumatic application device. More particularly, the present invention relates to a copper powder screw pneumatic coating device using pneumatic and rotational driving of a screw to apply copper powder with a uniform thickness on the surface of an oilless bush.

The oilless bush having high load and high durability is essential to apply copper powder on the surface of the raw material and sinter it, and to maintain uniform coating and thickness in the process of applying copper powder. It is the key point in the powder coating process.

Conventional blade type copper powder coating method has a coating variation depending on the flatness of the raw material, and if foreign matter enters during the coating process, the form of the foreign matter exists in the surface layer, causing moldability and defects of the product.

Therefore, a problem was solved by manufacturing a coating system of a circular blade type, but a phenomenon such as holes and worms occurred on a coated portion of copper powder due to a problem in which copper powder absorbs and combines moisture present in the air. This exists.

In particular, in the case of the conventional coating method, the coating thickness of the copper powder is varied in the range of about 0.1mm to 0.5mm, the variation is varied, due to the uneven coating form of the cold rolled steel sheet in the subsequent sintering process ( SPCC (steel plate cold commercia) Due to the difference in warpage, thickness variation and powder porosity of the base steel sheet, it has a great influence on the product quality.

In addition, in the development of the oilless bush, in order to obtain a uniform sintered material, the absence of a process for precisely applying the copper powder is a situation in which product quality difficulties occur. In particular, when the copper powder is unevenly applied on the base iron plate, problems in forming process occur in the subsequent process.

On the other hand, as a conventional document suggesting the process of forming a sintered porous metal coating on the substrate may be referred to Patent Publication No. 10-2012-0089594 (2012.08.13). This document discloses the application of a stirred suspension onto a substrate using an ultrasonic spray nozzle and then sintering the applied particles to form a porous coated thin film, but in the process of feeding copper powder onto a base iron sheet, There is a limitation that the method of applying the coating evenly while minimizing the exposure time is not disclosed.

(Patent Document 1) KR10-2012-0089594 A

The present invention is to solve the above problems, the copper to supply the copper powder on the base iron plate by using the pneumatic and the rotational drive of the screw to apply the copper powder with a uniform thickness on the surface of the oilless bush It is an object to provide a powder screw pneumatic coating device.

Copper powder screw pneumatic coating device according to the present invention for achieving the above object is a powder supply unit 10 is supplied through the open space of the copper powder; A driving unit 20 disposed at one lower side of the powder supply unit 10; A powder transfer part 30 connected to the powder supply part 10 and the driving part 20, respectively; A powder ejecting unit 40 for discharging copper powder supplied in a state connected to the powder conveying unit 30; A nozzle barrel 50 which is a space in which the copper powder discharged from the powder spraying part 40 is sprayed; And a pneumatic regulator 60 for precisely adjusting the air pressure in the state connected to the powder ejecting part 40, wherein the powder conveying part 30 is a screw rotation method for the copper powder supplied from the powder supply part 10 Using to transfer to the powder ejecting portion 40.

The powder transfer unit 30 may include a transfer body 31 disposed on the lower side of the powder supply unit 10 and a plurality of transfer screws 33 rotatably disposed on a transfer groove formed in the transfer body 31. And a powder inlet groove 34 communicating with the transfer groove through an upper portion of the transfer body 31.

The drive unit 20 includes a drive motor 21, a drive pulley 22 coupled to the drive motor 21, a plurality of drive shafts 23 connected to and driven through a power transmission body to the drive pulley 22, and And a coupling 24 coupled to the ends of the plurality of drive shafts 23, wherein the plurality of feed screws 33 are coupled to the coupling 24 and thereby from the drive motor 21. Power transmission takes place.

The powder ejection portion 40 includes a main flow passage 41 penetrating therein and an auxiliary flow passage 43 communicating with the powder transfer portion 30 through the side of the main flow passage 41. The upper end of 41 is connected to the nozzle 51 coupled to the nozzle barrel 50, and the lower end is connected to the pneumatic regulator 60 through an air flow tube 62.

The copper powder screw pneumatic coating device of the present invention as described above allows the copper powder to be coated on a base iron plate forming an oilless bush using a pneumatic and a rotating drive of the screw to obtain a sintered material having a constant thickness. .

The present invention is designed to minimize the atmospheric exposure time of the copper powder having a property of quickly absorbing moisture when exposed to air, thereby preventing poor coating thickness on the base iron plate.

In addition, the present invention enables the selective application of copper powder by using a pneumatic and a regulator, and makes it possible to control the coating speed according to the feed rate of the sintered material.

1 is a perspective view showing the overall appearance of a copper powder screw pneumatic coating device according to an embodiment of the present invention,

FIG. 2 is a perspective view of the outer cover removed from FIG. 1; FIG.

3 is a view showing in detail the structure in which the copper powder from the powder supply unit is supplied in combination with a screw and a pneumatic regulator,

4 is a side view of FIG. 3, and

5 is a view showing the flow structure of the copper powder around the powder transfer unit and the powder ejection unit.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art the scope of the invention. It is provided for complete information. Like numbers refer to like elements on the drawings.

In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

1 is a perspective view showing the overall appearance of a copper powder screw pneumatic coating device according to an embodiment of the present invention, Figure 2 is a perspective view of the outer cover removed in Figure 1, Figure 3 is a copper powder screw and pneumatic regulator from the hopper FIG. 4 is a side view of FIG. 3 and a view showing in detail a structure supplied according to a combination thereof.

The copper powder screw pneumatic coating device according to the present invention allows the copper powder to be uniformly coated on the base iron plate forming the oilless bush, which will be described below based on this, but is not limited thereto. It may be applied to various coating processes on the process and the semiconductor manufacturing process. The present invention is applicable to bronze powder which is an alloy in which tin is mixed with copper.

As shown in Figures 1 to 5, the copper powder screw pneumatic coating device according to the present invention is the outer fixed frame (1), the vertical feed motor (2) disposed on the upper end of the outer fixed frame (1), the outer fixed frame A moving wheel 3 coupled to the bottom of the (1), and a cover 4 constituting the side of the outer fixing frame (1). The outer fixed frame 1 enables freely displaceable through the moving wheels 3 in the state in which the components of the application apparatus described later are seated. The cover 4 facilitates the protection and maintenance of the components of the application device. The up and down feed motor 2 can adjust the height of the copper powder particles sprayed on the base steel plate to be transported downward by enabling the height of the copper powder screw pneumatic coating device to be adjusted on the outer fixed frame 1.

Specifically, the copper powder screw pneumatic coating device includes a first powder supply unit 10 in which copper powder is supplied through an open space thereon, a driving unit 20 disposed on a lower side of the first powder supply unit 10, and a first The powder feeder 30 connected to the powder supply part 10 and the driving part 20, the powder ejection part 40 and the powder ejection part 40 which discharge a small amount of the powder supplied in the state connected to the powder feeder 30. Pneumatic regulator 60, the first powder supply unit 10 for precisely adjusting the air pressure in the state in which the powder discharged from the nozzle is connected to the nozzle cylinder 50, the powder ejecting portion 40, which is a space injected by the nozzle 51 It includes a second powder supply unit 70 disposed on the top of the.

The first powder supply unit 10 may gradually fall by applying vibration to the copper powder supplied as a hopper type having a shape that gradually narrows toward the lower direction in an open state. The lower part of the first powder supply part 10 is connected to the upper end of the powder transfer part 30 through the first powder supply pipe 12.

The drive unit 20 includes a drive motor 21, a drive pulley 22 coupled to the end of the drive motor 21, a plurality of drive shafts 23 and a plurality of drive shafts connected to and driven by a timing belt to the drive pulley 22. And a coupling 24 coupled to the end of 23. That is, the plurality of drive shafts 23 has a structure that is continuously arranged at a predetermined interval along the longitudinal direction of the powder transfer unit 30, driven driven pulleys (not shown) coupled to the ends of the plurality of drive shafts 23 Power transmission from the drive motor 21 is performed with the drive pulley 22 connected with the timing belt.

The powder transfer unit 30 transfers the copper powder supplied from the first powder supply unit 10 through the first powder supply pipe 12 to the powder ejection unit 40 through a process of adjusting the rotational speed of the screw.

The powder transfer part 30 may include a plurality of transfer screws rotatably disposed on a transfer body 31 disposed on a lower side of the first powder supply part 10 and a transfer groove formed in the transfer body 31. And a powder inlet groove 34 connecting the upper end of the transfer body 31 and the transfer groove. The plurality of feed screws 33 are coupled to the plurality of drive shafts 23 through the coupling 24, and receive a rotational driving force from the drive shaft 23 through the coupling structure.

That is, since the power from the drive motor 21 enables the rotary drive of the plurality of feed screws 33 as a result through the timing belt, the feed screw through the process of adjusting the rotational speed of the drive motor 21. The rotation speed of 33 can be varied.

The powder ejection portion 40 includes a main flow passage 41 penetrating therein and an auxiliary flow passage 43 communicating with the powder discharge groove 35 of the powder transfer portion 30 through the side of the main flow passage 41. . The upper end of the main flow passage 41 is connected to the nozzle 51, and the lower end is connected to the pneumatic regulator 60 through the air flow pipe 62. The powder ejecting portions 40 are arranged in a line along the front of the conveying body 31 in the same number so as to correspond to the plurality of conveying screws 33, respectively.

Under the structure, the copper powder particles supplied from the powder transfer part 30 through the auxiliary flow path 43 are sprayed onto the main flow path 41, and at the same time, the copper powder is controlled through precise trace air pressure control of the plurality of pneumatic regulators 60. The particles are moved to the nozzle 51.

The nozzle cylinder 50 is coupled to the nozzle 51 on the upper side of the side, through which the copper powder is injected from the nozzle 51 to achieve a state that is injected into the interior of the nozzle cylinder (50). The nozzle barrel 50 may be opened in the upper and lower parts for cleaning the interior and checking the condition.

The plurality of pneumatic regulators 60 are in communication with the plurality of powder ejecting portions 40, respectively, and control the respective pneumatic regulators 60 in this state to differential the air pressure supplied to the plurality of powder ejecting portions 40. Can be adjusted by That is, by adjusting the pressure applied to the pneumatic regulator 60, it is possible to select only a part of the plurality of powder ejection portions 40 to apply the copper powder, and a separate logic such as a programmable logic controller (PLC) The control allows for sequential control.

Here, the PLC sequentially processes the input by the program and uses the output result to control the connected pneumatic regulator 60. The PLC can be used alone or in conjunction with systems such as SCADA (Supervisory Control And Data Acquisition). The PLC has multiple inputs and outputs, operates over a wide temperature range, and programs for control are stored in battery backup and nonvolatile memory. In addition, having a real-time processing capability for the input, the output responds within a predetermined time to a predetermined time input condition.

The second powder supply unit 70 is disposed on the upper side of the first powder supply unit 10, and functions to transfer the copper powder to the first powder supply unit 10 by pretreating the powder. Specifically, the second powder supply unit 70 may include an upper hopper 71, a powder supply nibbol 72 connected to a lower end of the upper hopper 71, and a second powder supply pipe 73 connected to a lower end of the powder supply nibbol 72. And a powder container 74 coupled to the lower end of the second powder supply pipe 73. The powder container 74 is a hollow rectangular parallelepiped type and maintains a shape that entirely covers the open upper space of the first powder supply part 10.

Hereinafter, referring to FIGS. 1 to 5, a coating process using the copper powder screw pneumatic coating device according to the present invention will be described.

First, copper powder is input through the second powder supply part 70. The copper powder is added in a multi-stage manner through the second powder supply unit 70 and the first powder supply unit 10, but only the first powder supply unit 10 is used while the second powder supply unit 70 is omitted. Input can proceed.

On the other hand, the pneumatic regulator 60 is ready to adjust the air pressure supplied to the powder ejection portion 40 through the PLC, etc.

Thereafter, the transfer of the base iron plate requiring application along the transfer conveyor disposed along the lower portion of the nozzle barrel 50 is started.

The copper powder reaching the conveying body 31 of the powder conveying part 30 via the first powder supply part 10 reaches the powder discharge hole 35 according to the rotational movement of the conveying screw 33, and then the powder ejecting part ( It flows into the main flow path 41 through the auxiliary flow path 43 of 40. In this state, the fine powder air pressure control of the plurality of pneumatic regulators 60 allows the copper powder particles on the main flow passage 41 to move to the nozzle 51 through the air flow pipe 62.

Thereafter, the copper powder particles filling the nozzle barrel 50 may be applied with a uniform thickness on the base iron plate disposed below.

The terms "comprise", "comprise" or "having" described above mean that a corresponding component may be included unless specifically stated otherwise, and thus does not exclude other components. It should be construed that it may further include other components. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

A powder supply part 10 through which copper powder is supplied through an open space at an upper portion thereof;

A driving unit 20 disposed at one lower side of the powder supply unit 10;

A powder transfer part 30 connected to the powder supply part 10 and the driving part 20, respectively;

A powder ejecting unit 40 for discharging copper powder supplied in a state connected to the powder conveying unit 30;

A nozzle barrel 50 which is a space in which the copper powder discharged from the powder spraying part 40 is sprayed; And

And a pneumatic regulator (60) for precisely adjusting the air pressure in the state connected to the powder ejection part (40).

The powder transfer unit 30 to transfer the copper powder supplied from the powder supply unit 10 to the powder ejecting unit 40 by using a screw rotation method,

Copper powder screw pneumatic coating device.
The method of claim 1,

The powder transfer unit 30,

A transfer body 31 disposed on the lower side of the powder supply unit 10, a plurality of transfer screws 33 rotatably disposed on a transfer groove formed in the transfer body 31, and the transfer body 31. It includes a powder inlet groove 34 in communication with the transfer groove through the upper,

Copper powder screw pneumatic coating device.
The method of claim 2,

The drive unit 20,

A drive motor 21, a drive pulley 22 coupled to the drive motor 21, a plurality of drive shafts 23 and a plurality of drive shafts 23 connected to and driven by a power transmission body to the drive pulley 22. A coupling 24 coupled to the end,

The plurality of feed screw 33 is coupled to the coupling 24 in which power transmission from the drive motor 21 is made,

Copper powder screw pneumatic coating device.
The method of claim 3, wherein

The powder ejection portion 40 includes a main flow passage 41 penetrating therein and an auxiliary flow passage 43 communicating with the powder transfer portion 30 through the side of the main flow passage 41. 41, the upper end is connected to the nozzle 51 coupled to the nozzle barrel 50, the lower end is connected to the pneumatic regulator 60 through the air flow pipe 62,

Copper powder screw pneumatic coating device.