KR970001788B1 - Powder dispersing machine - Google Patents

Powder dispersing machine Download PDF

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Publication number
KR970001788B1
KR970001788B1 KR1019940009073A KR19940009073A KR970001788B1 KR 970001788 B1 KR970001788 B1 KR 970001788B1 KR 1019940009073 A KR1019940009073 A KR 1019940009073A KR 19940009073 A KR19940009073 A KR 19940009073A KR 970001788 B1 KR970001788 B1 KR 970001788B1
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KR
South Korea
Prior art keywords
electric field
powder
mixing tube
electric
tube
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KR1019940009073A
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Korean (ko)
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KR950028826A (en
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안영후
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안영후
이부엽
조양희
김승환
김태선
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Priority to KR1019940009073A priority Critical patent/KR970001788B1/en
Publication of KR950028826A publication Critical patent/KR950028826A/en
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Publication of KR970001788B1 publication Critical patent/KR970001788B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16Arrangements for supplying liquids or other fluent material
    • B05B5/1683Arrangements for supplying liquids or other fluent material specially adapted for particulate materials

Abstract

The apparatus performs a regular coating, specially on corners by forming an elecric field in opposition to the direction of the power flow, installing an electric field buffer for varying the electric field, and realizing an electrification near an object. It comprises a power line(12) supplying the powder; a air supply line(14); a mixture line(10) mixing the air and the powder; a multiple of electric field probes(22,24) connected to a high pressure generator(20); an electric field generator; a means varying the density of the electric field.

Description

분말분사장치Powder spraying device

제1도는 종래의 분말분사장치를 나타낸 구성도.1 is a block diagram showing a conventional powder injection value.

제2도는 제1도에서 혼합관의 전계침부분을 나타낸 단면도.FIG. 2 is a cross-sectional view showing the electric field part of the mixing tube in FIG.

제3도는 본 발명에 따른 분말분사장치를 나타낸 구성도.Figure 3 is a block diagram showing the powder injection value according to the present invention.

제4도는 제2도에서 버퍼부만을 나타낸 상세도이다.4 is a detailed view showing only the buffer unit in FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 혼합관 12 : 분말입자관10: mixing tube 12: powder particle tube

14 : 공기관 20 : 고압발생기14: air pipe 20: high pressure generator

22,24 : 전계침 26 : 전계버퍼22,24 Electric field needle 26 Electric field buffer

27 : 몸체 28 : 스크류 단자27: body 28: screw terminal

30 : 피도물30: object

본 발명은 스프레이 건의 선단부에, 분말입자의 흐름방향과 반대로 전계가 형성되고 전계를 가변시키기 위한 전계버퍼를 설치하므로써 피도물에의 균일한 코팅이 이루어지도록 하고 특히, 피도물에 근접된 상태에서 대전이 이루어지도록 하여 피도물이 모서리부분에도 균일한 코팅이 이루어지도록 한 분말분사장치에 관한 것이다.According to the present invention, an electric field is formed at the tip of the spray gun in the opposite direction to the flow direction of the powder particles, and an electric field buffer for varying the electric field is provided so that a uniform coating is applied to the object. The present invention relates to a powder spraying device in which a coating is formed evenly on a corner of a workpiece.

일반적으로, 스프레이 건을 이용하여 피도물에 분말입자를 코팅할때에는 여러 가지의 작업여건에 관계없이 중앙부분은 물론 모서리 부분에 이르기까지 균일한 두께로 코팅이 이루어져야만 하며 이를 위해서는 분사상태가 고르게되고 양호하게 이루어져야 한다.In general, when the powder particles are coated on the coating using the spray gun, the coating should be uniformly applied to the center and corners regardless of various working conditions. Should be done.

한편, 종래의 분말분사장치는 제 1 도 및 제 2 도에 나타낸 바와같이 페인팅용 분말입자가 공급되는 분말입자관(12)과 고압의 공기를 공급하는 공기관(14)이 혼합관(10)의 일측에 형성되어 있고 상기 혼합관(10)의 일측 선단에 고압발생기(20)와 연결된 다수의 전계침(22)이 서로 대향되도록 형성되어 있으며 상기 혼합관(10)의 전방에는 분말입자가 분사 코팅되는 피도물(30)이 설치되어 있다.Meanwhile, as shown in FIGS. 1 and 2, a conventional powder spraying device includes a powder particle tube 12 to which painting powder particles are supplied and an air tube 14 to supply high-pressure air to the mixing tube 10. It is formed on one side and a plurality of electric needles 22 connected to the high-pressure generator 20 at one end of the mixing tube 10 are formed to face each other, the powder particles are spray-coated in front of the mixing tube 10 The workpiece 30 to be installed is provided.

상기와 같은 종래의 분말분사장치는 공기관(14)의 고압공기에 의해 분말입자관(12)내의 분말입자가 혼합되면서 혼합관(10) 선단의 전계침(22)을 거쳐 피도물(30)측으로 분사되고 상기 혼합관(10) 선단의 전계침(22)부분은 고압발생기(20)에 의해 -고전압(100KV)이 흐르면서 주위를 -로 대전시키며 이 고전압에 의하여 -로 대전되어 피도물(30)과 혼합관(10) 사이에 이온화부를 형성하게 된다.The conventional powder spraying device is sprayed to the object 30 through the electro-needle 22 at the tip of the mixing tube 10 while the powder particles in the powder particle tube 12 are mixed by the high pressure air of the air tube 14. The electric field needle 22 at the tip of the mixing tube 10 is charged with-by a high voltage generator 20 and charged with-by the high voltage, and mixed with the workpiece 30 by-with this high voltage. An ionization portion is formed between the tubes 10.

이때, 상기 분말입자는 혼합관(10)을 따라 안내되면서 혼합관(10)의 전계침(22)과 피도물(30) 사이의 정전 분위기 속에서 분사될 때 + 전하를 띤 피도물(30)에 -전하를 띤 분말입자가 피도물(30)에 부착되고 이에 따라 소정의 두께로 코팅이 이루어지게 된다.At this time, the powder particles are guided along the mixing tube 10 while being sprayed in the electrostatic atmosphere between the electric field 22 and the object 30 of the mixing tube 10 to the charged object 30 + Charged powder particles are attached to the workpiece 30, and thus coating is performed to a predetermined thickness.

그러나, 상기와 같은 분말분사장치에 있어서는 혼합관(10)의 한 지점에 다수의 전계침(22)이 형성되어 있기 때문에 상기 혼합관(10)의 전계침(22)과 피도물(30) 사이의 정전 분위기 속에서 분사 코팅이 이루어지고 이에 따라서 피도물(30)에 어떤 전하가 흐름으로 인한 전하량의 밀도분포가 불균일하게 되어 코팅두께가 균일하지 않게 되는 문제점이 있었다.However, in the powder spraying device as described above, since a plurality of electric needles 22 are formed at one point of the mixing tube 10, the electrostatic needle 22 of the mixing tube 10 and the workpiece 30 are separated. The spray coating is performed in the electrostatic atmosphere, and accordingly, there is a problem in that the density distribution of the charge amount due to the flow of some charges to the workpiece 30 becomes nonuniform, resulting in uneven coating thickness.

다시 말해서, 피도물(30)에 형성되는 정전력에 따른 표피효과 또한 비례적으로 발생되기 때문에 피도물(30)의 중심부 일수록 쇄교자속이 많아지게 되고 인덕턴스가 커지게 되므로 전하량이 모이기 힘들게 되며, 이에따라 피도물(30)의 중심부보다 가장자리 부분에서 두꺼운 코팅이 형성되어 전체적으로 균일한 코팅이 이루어지지 않게 되는 문제점이 있었다.In other words, since the skin effect according to the electrostatic force formed in the workpiece 30 also occurs in proportion, the more the linkage flux is increased and the inductance is increased at the center of the workpiece 30, so that the amount of charge becomes difficult to collect. There was a problem in that a thick coating is formed at the edge portion of the center than the center of 30) to make a uniform coating as a whole.

또한, 피도물(30)에 절곡되는 모서리 부분이 형성되어 있는 경우에는 피도물(30)에 형성되는 정전력의 반발력에 의해서 분말입자의 코팅이 효과적으로 이루어지지 않게되고 여타의 다른 부분보다 코팅층이 얇아 균일한 코팅이 이루어지지 않게 되는 등의 문제점이 있었다.In addition, when the bent corner portion is formed on the workpiece 30, the coating of the powder particles is not effectively performed by the electrostatic repulsive force formed on the workpiece 30, and the coating layer is thinner than other portions to be uniform. There was a problem such that the coating is not made.

본 발명은 상기와 같은 종래 제반 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 스프레이 건의 혼합관 선단부에 분말입자의 흐름방향과 반대로 전계가 형성되도록 하는 소정의 간격을 갖고 전계침이 형성되며 상기 전계밀도를 가변시키기 위한 전계버퍼가 설치되어 피도물에의 균일한 코팅이 이루어지고 특히, 피도물에 근접된 상태에서 대전됨에 따라 모서리 부분에서도 균일한 코팅이 이루어지도록 한 분말분사장치를 제공하는데 있다.The present invention is to solve the conventional problems as described above, an object of the present invention is to form a field needle at a predetermined interval to the electric field is formed at the tip of the mixing tube of the spray gun in the opposite direction of the flow direction of the powder particles and the electric field An electric field buffer for varying the density is provided to provide a uniform coating on the workpiece, and in particular, to provide a powder spraying device to achieve a uniform coating on the corners as it is charged in close proximity to the workpiece.

상기와 같은 목적을 달성하기 위한 본 발명의 특징은, 페인팅용 분말입자가 공급되는 분말입자관과 고압의 공기를 공급하는 공기관이 혼합관의 일측에 형성되고 상기 혼합관의 일측 선단에 고압발생기와 연결된 다수의 전계침이 서로 대향되도록 형성되는 분말분사장치에 있어서, 상기 혼합관에 분말입자의 흐름방향과 반대로 전계를 형성하기 위한 전계 생성수단과 전계밀도를 가변시키기 위한 가변수단이 구비되어 있는 점에 있다.A feature of the present invention for achieving the above object is a powder particle tube to which the powder particles for painting are supplied and an air tube for supplying high-pressure air is formed at one side of the mixing tube and a high pressure generator at one end of the mixing tube. A powder spraying device in which a plurality of connected electric needles are opposed to each other, wherein the mixing pipe is provided with an electric field generating means for forming an electric field opposite to a flow direction of powder particles and a variable means for varying electric field density. Is in.

이하, 본 발명에 따른 분말분사장치를 바람직한 일 실시예와 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail based on the preferred powder spraying value according to the present invention and the accompanying drawings.

제3도 및 제 4도는 본 발명에 따른 분말분사장치를 설명하기 위해 나타낸 도면들로써 혼합관(10)의 일측에는 페인팅용 분말입자가 공급되는 분말입자관(12)과 고압의 공기를 공급하는 공기관(14)이 형성되고 상기 혼합관(10)의 일측 선단부분에 고압발생기(20)와 연결된 다수의 전계침(22)이 서로 대향되도록 형성되어 있다.3 and 4 are diagrams for explaining the powder spraying apparatus according to the present invention, one side of the mixing tube 10 is a powder particle tube 12 is supplied with painting powder particles and an air tube for supplying high-pressure air 14 is formed and a plurality of field needles 22 connected to the high-pressure generator 20 on one side of the mixing tube 10 are formed to face each other.

상기 혼합관(10)에는 상기 전계침(22)과 소정의 간격으로 이격된 위치에 또 하나의 전계침(24)이 형성되며, 상기 전계침(24)에는 전계밀도를 가변시키기 위한 전계버퍼(26)를 통해 접지하되, 상기 전계침(24)은 혼합관(10) 전방측의 전계침(22)에 인가된 고전압발생기(20)로부터 발생된 고전압이 접지되도록 이루어져 있다.The mixing pipe 10 is formed with another field needle 24 at a position spaced apart from the field needle 22 at a predetermined interval, the field needle 24 has an electric field buffer for varying the electric field density ( While grounding through 26, the field needle 24 is configured such that the high voltage generated from the high voltage generator 20 applied to the field needle 22 on the front side of the mixing tube 10 is grounded.

상기 혼합관(10)에 설치된 전계침(22)(24)은 혼합관(10)의 내면보다 그 선단부분이 약간 돌출되어 있으며, 또한, 상기 전계버퍼(26)는 몸체(27)에 전계밀도의 조절가능하도록 두 개의 스크류 단자(28)가 서로 대향된 상태로 나사결합되어 스크류 단자(30)의 간격을 조절할 수 있게 되어 있다.The electric field needles 22 and 24 installed in the mixing tube 10 protrude slightly from the inner surface of the mixing tube 10, and the electric field buffer 26 has an electric field density in the body 27. The two screw terminals 28 are screwed in a state opposite to each other so as to be adjustable so that the spacing of the screw terminals 30 can be adjusted.

상기 혼합관(10)의 전방에는 혼합관(10)내의 전계침(22)(24)에 의해 -전하(정전기)를 띤 분말입자가 분사되어 부착 코팅되는 피도물(30)이 설치되어 있다.In front of the mixing tube 10 is a coating 30 to be coated by the injection of the electrostatic (electrostatic) powder particles with a charge (electrostatic) by the electric needle (22, 24) in the mixing tube (10).

상기와 같이 구성된 본 발명 실시예에 따른 분말분사장치는 공기관(14)의 고압공기에 의해 분말입자관(12)내의 분말입자가 혼합되면서 혼합관(10) 선단부분의 전계침(22)(24)을 거쳐 피도물(30)측으로 분사되고 상기 혼합관(10)의 선단측 전계침(22)(24)부분은 고압발생기(20)에 의해 -고전압(100KV)이 흐르면서 주위를 -로 대전시키며 이 고전압에 의하여 -로 대전되어 이온화부를 형성하게 된다.The powder spraying device according to the embodiment of the present invention configured as described above is mixed with the powder particles in the powder particle pipe 12 by the high pressure air of the air pipe 14, and the electric field needles 22 and 24 at the tip of the mixing pipe 10 are mixed. And injected into the object (30) side of the mixing tube 10, the electric field needle (22, 24) of the tip side of the mixing tube (10) by the high-pressure generator (20) to charge the surroundings to-while high voltage (100KV) flows It is charged to-by a high voltage to form an ionization part.

이때, 분말입자는 혼합관(10)에 안내되어 혼합관(10)의 전계침(22)(24) 사이를 통과하면서 -전하를 띤 상태로 분사된 후 상기 분말입자는 피도물(30)에 근접됨에 따라 +대전된 상태에서 부착되어 균일한 코팅이 이루어지게 된다.At this time, the powder particles are guided to the mixing tube 10 and passed between the electric field needles 22 and 24 of the mixing tube 10 and then sprayed in a charged state, and then the powder particles are close to the workpiece 30. As a result, it is attached in a positively charged state to achieve a uniform coating.

즉, 피도물(30)에 전계를 형성시키지 않고 분말입자에 정전기(전하)를 띤 상태로 피도물(30)에 근접시키면 정전유도 현상에 의하여 쿨롱의 법칙인 정전력이 발생하며 분말입자는 피도물(30)에 달라붙게 되고 피도물(30) 내부의 전하량 밀도가 변하지 않게 되는 것이며 상기 피도물(30)의 여건에 따라 전계버퍼(26)의 스크류 단자(28)를 회전시켜 스크류 단자(28) 사이의 간격을 조절하므로써 피도물(30)에 적합한 상태로 코팅이 이루어지도록 전계밀도를 용이하게 조절할 수 있는 것이다.That is, if the powder 30 does not form an electric field and is close to the workpiece 30 with the static electricity (charge) on the powder particles, the electrostatic induction phenomenon generates electrostatic force, which is the Coulomb's law, and the powder particles are the workpiece (30). ) And the density of the charge amount inside the workpiece 30 does not change, and according to the conditions of the workpiece 30, the screw terminals 28 of the electric field buffer 26 are rotated to adjust the distance between the screw terminals 28. By adjusting, the electric field density can be easily adjusted so that the coating is made in a state suitable for the workpiece 30.

따라서, 본 발명 실시예에 따른 분말분사장치는 스프레이 건의 혼합관(10) 선단부에 분말입자의 흐름방향과 반대로 전계가 형성되도록 소정의 간격을 갖고 전계침(22)(24)이 형성되어 있기 때문에 분말입자가 정전기(전하)를 띤 상태로 분사되어 피도물(30)에 근접되면, 정전유도 현상에 의하여 쿨롱의 법칙인 정전력이 발생하여 피도물(30)에 달라붙게 되며, 따라서 피도물(30) 내부의 전하량 밀도가 변하지 않아 표피효과에 의한 악영향을 받지 않고 균일한 두께로 코팅이 이루어지는 것이다.Therefore, since the powder spraying device according to the embodiment of the present invention has electric field needles 22 and 24 formed at predetermined intervals so that an electric field is formed at the distal end of the mixing tube 10 of the spray gun as opposed to the flow direction of the powder particles. When the powder particles are injected in a state of being charged with static electricity (charge) and are close to the workpiece 30, electrostatic induction causes electrostatic force, which is the law of Coulomb, to stick to the workpiece 30 and thus the interior of the workpiece 30. Since the charge density of the does not change, the coating is made to have a uniform thickness without being adversely affected by the skin effect.

또한, 피도물(30)에 전계를 형성시키지 않은 상태에서 코팅을 수행하므로써 피도물(30)에 근접된 상태에서 정전유도 현상에 의하여 분말입자가 피도물(30)에 달라 붙으며 이에따라 피도물(30)의 중앙부분은 물론 절곡된 모서리 부분에도 균일한 코팅이 이루어지는 것이다.In addition, the powder particles adhere to the workpiece 30 by electrostatic induction in a state in which the coating is performed in a state in which the electric field is not formed on the workpiece 30, and thus the center of the workpiece 30 is attached thereto. Uniform coating is applied to the bent corner as well as the part.

또한, 상기 혼합관(10)에 형성되는 전계를 전계버퍼(26)에 설치된 스크류 단자(28)의 간격을 조절하므로써 피도물(30)에 적합한 상태의 전계밀도를 갖도록 용이하게 조절할 수 있는 것이다.In addition, the electric field formed in the mixing tube 10 can be easily adjusted to have an electric field density in a state suitable for the workpiece 30 by adjusting the distance between the screw terminals 28 provided in the electric field buffer 26.

이상에서와 같이 본 발명에 따른 분말분사장치에 의하면, 스프레이 건의 혼합관 선단부에 분말입자의 흐름방향과 반대로 전계가 형성되도록 소정의 간격을 갖고 전계침이 형성되어 있으며 상기 전계를 가변시키기 위한 전계버퍼가 설치되므로써 피도물에 균일한 코팅이 이루어지고 특히, 피도물에 근접된 상태에서 대전됨에 따라 모서리 부분에서도 균일한 코팅이 이루어지게 되는 점 등의 특징을 지닌 것이다.As described above, according to the powder spraying device according to the present invention, an electric field needle is formed at predetermined intervals so that an electric field is formed at the distal end of the mixing tube of the spray gun as opposed to the flow direction of the powder particles. Since the uniform coating is made on the object to be installed, and in particular, as the electric charge in the state close to the object is characterized in that the uniform coating is also made in the corner portion.

Claims (2)

페인팅용 분말입자가 공급되는 분말입자관과 고압의 공기를 공급하는 공기관이 혼합관의 일측에 형성되고 상기 혼합관의 일측선단에 고압발생기와 연결된 다수의 전계침이 서로 대향되도록 형성되는 분말분사장치에 있어서, 상기 혼합관의 일측 선단부분에 서로 대향되도록 형성된 고압발생기와 연결되는 다수의 전계침과, 상기 혼합과 전방측의 전계침에 인가된 고전압발생기로부터 발생된 고전압이 접지되도록 상기 전계침과 소정의 간격으로 이격된 위치에 형성되는 또 한의 전계침으로 되어있는 전계생성수단과, 전계밀도를 가변시키기 위한 가변수단을 구비하여 구성됨을 특징으로 하는 분말분사장치.Powder spraying device in which a powder particle tube for painting powder particles is supplied and an air tube for supplying high pressure air are formed at one side of the mixing tube, and a plurality of electric needles connected to the high pressure generator at one end of the mixing tube are opposed to each other. And a plurality of electric needles connected to a high pressure generator formed at one end of the mixing tube so as to face each other, and a high voltage generated from a high voltage generator applied to the mixing and front electric needles to ground the electric needles. And an electric field generating means comprising another electric needle formed at a spaced apart position at predetermined intervals, and a variable means for varying electric field density. 제1항에 있어서, 상기 가변수단이, 몸체에 두 개의 스크류 단자가 서로 대향된 상태에서 간격을 조절할 수 있도록 전계버퍼로 됨을 특징으로 하는 분말분사장치.The powder spraying device according to claim 1, wherein the variable means comprises an electric field buffer so as to adjust a gap in a state in which two screw terminals face each other.
KR1019940009073A 1994-04-28 1994-04-28 Powder dispersing machine KR970001788B1 (en)

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KR970001788B1 true KR970001788B1 (en) 1997-02-15

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