CN2161380Y

CN2161380Y - Powder coating spray pistol

Info

Publication number: CN2161380Y
Application number: CN 93216195
Authority: CN
Inventors: 李宗能
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-18
Filing date: 1993-06-18
Publication date: 1994-04-13
Anticipated expiration: 2003-06-18

Abstract

The utility model relates to a powder coating spray pistol, which is provided with a grab handle type blast gun pipe. The inner space of the gun pipe is provided with two central pipes. The right end of the spray gun pipe and the side part are respectively provided with one input pipe for high pressure gas and one suction tube for powder. The gas and powder enter the gun pipe and are guided by a spiral plastic guide pipe circled between two central pipes. The spiral mode of the spiral guide pipe is in the shape of the S, and the frictional chance of the powder and an inner wall inside the guide pipe can be increased. The static voltage value of the powder can be improved, and the application effect can be improved.

Description

Powder coating spray pistol

What the utility model was related is a kind of powder-coating spraying gun that is used for forming protective finish on various body surfaces.

The powderject coating method is a kind of for the protective money metal elements or form the construction method that the special surface coating designs.This method adopts a spray gun, has spiral helicine gas flow channel in the spray gun.When pressure-air when this passage, formed negative pressure is drawn into powder of solid particles among the passage, when solid particle divides the end to cross passage with the air high velocity stream and the plastic tube that constitutes passage rub continuously, thereby have static; When charged powder is sprayed onto coated surface, just can adhere to from the teeth outwards; At last coated object is carried out high-temperature baking, make the powder of solid particles fusing, just can form protective layer from the teeth outwards.

In said method, if want to improve the deposit efficiency of powder, then must improve powder of solid particles self with the electrostatic potential value.

The structure of known powder-coating spraying gun is shown in accompanying drawing 5,6.This spray gun has a tube-like envelope 1, and center main 2 is housed in it, is wound with rear portion and sidepiece that many spiral ducts 5, one powder suction lines 3 and gases at high pressure input pipe 4 are installed in tube-like envelope 1 end respectively on the outer surface of center main 2.Gases at high pressure are sent into by input pipe 4 after the chamber at tube-like envelope 1 center, just form negative pressure owing to its high line is moving, automatically powdery paints are sucked among the spray gun.Above-mentioned spiral duct 5 is connected on the port of export of above-mentioned high-pressure chamber, the central authorities of spiral duct 5 have flow passage 51, when gases at high pressure carried the fine particle sprills and flow through flow passage 51, powder just rubbed with the inwall of spiral duct 5 apace mutually, thereby is with static.Charged powder is sprayed onto coated when surface, just can be attached on the coated surfaces.

Yet, the spiral duct 5 of known spray gun shown in accompanying

drawing

5,6 merely with identical direction of rotation around being spun on the center main 2, when powdery paints flows in flow passage 51, be subjected to action of centrifugal force, only rub mutually with the inwall A place, the outside of spiral duct 5, cause powder with the electrostatic potential value be not very high and inhomogeneous, when causing coating construction to adhere to thickness and surface covered all desirable not to the utmost.

In addition, the gases at high pressure input pipe 4 of known spray gun be connected on the perpendicular side surface direction of spray gun shell 1 axial direction on, the powder suction line then is contained on the axial direction of spray gun shell 1, its shortcoming is when gases at high pressure pour vacuum chamber, gas directly impact with the perpendicular inwall of its direction of motion on, caused the loss of kinetic energy, entered spiral duct 5 formed negative pressure subsequently more naturally just not quite, and then also just reduced the flowing velocity of powder in spiral duct 5.As previously mentioned, the key that improves the spray gun surface covered be to increase powder with the electrostatic potential value, and powder is big more with the speed that the spiral duct inwall rubs mutually, formed electrostatic potential value is also just high, and the said structure that this shows known spray gun is to cause one of not high reason of electrostatic potential value.

The purpose of this utility model provides a kind of improved powder-coating spraying gun, its structure can increase the chance that powdery paints and spiral duct inwall rub mutually, improve the negative-pressure sucking of spray gun to powdery paints, directly unhinderedly inject in each spiral duct after making gases at high pressure and powder, thereby increase powder particle with the electrostatic potential value, improve the efficient of coating.

To achieve these goals, powder-coating spraying gun provided by the utility model has the formula of holding spray gun shank type lance tube, be connected to two center mains beyond the Great Wall at an aluminum Combining bolt that is positioned within this lance tube, be provided with a powder suction chamber that is connected with the gases at high pressure input pipe at the front end of embolism; One powder suction line is connected on the sidepiece of lance tube rear end, and the gases at high pressure input pipe is connected on the end of lance tube rear end; The rear end of above-mentioned powder suction chamber is connected a plate along separate routes, makes the mixed flow of gases at high pressure and powder be divided into several fluids by this shunt plate, enters intercalation among the several spiral ducts on the shunt plate; Spiral duct be serpentine around the mode of revolving, the powder in it not only can produce friction with the outboard tube inner wall surface of turning point up and down, and because the two halves arc conversion angle of bend of serpentine, the effect that powder is stirred.Like this, originally be in the circular arc inboard, thereby the less powder particle that rubbed is on the circular arc outer fix that can be subjected to bigger friction owing to changing bending direction, thereby obtain more uniform rubbing machine meeting, make the powdery paints of last ejaculation have height and uniform electrostatic potential, improved the effect of coating greatly.

Below with reference to accompanying drawing embodiment of the present utility model is done detailed explanation.

Accompanying drawing 1 is the stereo appearance figure of the utility model embodiment.

Accompanying drawing 2 is the three-dimensional cutaway view of the internal structure of demonstration present embodiment.

Accompanying drawing 2-A is the schematic diagram that embolism combines with the center main in the present embodiment.

Accompanying drawing 3 is the enlarged diagram of spiral duct in the utility model around the mode of revolving.

Accompanying drawing 4 is the side-looking and the sectional schematic diagram of the S type spiral duct of present embodiment.

Accompanying drawing 5 is the outside drawing of known powder-coating spraying gun.

Accompanying drawing 6 is the side-looking and the sectional schematic diagram of spiral duct shown in the accompanying drawing 5.

Referring to accompanying drawing 1,2, the powder-coating spraying gun of present embodiment mainly comprises: a lever type lance tube 10, the inside of this lance tube has the B of sky portion, the front end of lance tube 10, rear end all are taper, its front end has threaded portion 11, the rear end has end cover 12, and it is connected on the body 10 threadably, and integral body has constituted a rifle body; Threaded portion 11 is used to connect the multi-claw type lance head, be provided with a powder suction chamber (datum) in the end cover 12, gases at high pressure input pipe 13 is received the end of end cover 12,14 of another powder suction lines are received the sidepiece of end cover 12, when gases at high pressure are injected suction chamber with high speed, just form pull of vacuum to extract powdery paints, both directly are injected among the S shape spiral duct 18 together; After treating gases at high pressure and powdery paints mixing, its mixed flow is separated by the runner hole on the shunt plate (as the shape of label 17) that is contained in the suction chamber end, forms the current path (in the present embodiment, apportion path number is 6) of some numbers.

Shown in accompanying drawing 2-A, aluminum is V-shaped in conjunction with the structure of embolism 15, two forks divide

foot lever end

151 and 152 all to have thin footpath inserting part C, be used for respectively with the empty B of portion that is installed in lance tube 10 within two

center mains

20 and 21 end interlocking combine, be drilled with a screw 153 on the embolism 15, be used for connecting threadably a discharge connector 16.

Referring to accompanying

drawing

2,3,4, the characteristics of the utility model maximum be on two

center mains

20 and 21 around the spiral duct 18 that revolves, the pipe end interlocking of each bolt conduit 18 is combined in assigning on the air flow stream through hole of above-mentioned shunt plate, then each spiral duct 18 is side by side shape around being spun on two

center mains

20 and 21 side by side with six pipes, it is different from simple circle in the prior art around enforcing the law around the mode of revolving, and shuttles back and forth on two center mains in a kind of mode that is serpentine.

As shown in Figure 4, this advantage around the mode of revolving is after gases at high pressure and powder, when flowing in the flow passage 181 of spiral duct 18, because flow passage 181 is the circular arc type bend of S shape, formed centrifugal force is different from the formed centrifugal force of known technology.When powder particle is flowed through serpentine when being routed to the first road curved arc 30, most of powder particle side inwall C place outside spiral duct 18 first road curved arcs 30 that rubs; When powder particle enters the second road curved arc 31, originally be in the first road curved arc, 30 flow passages, 181 nearly positions, the center of circle, thereby be subjected to the less powder particle of frictional force to be in inwall D place, the curved arc outside owing to the path commutation becomes, under action of centrifugal force, rub mutually, thereby the frictional force that is subjected to increases with inwall D place.Like this, the combination of one group of first curved arc 30 and second curved arc 31 just can make the powder particle that flows in the path 181 pipe inner wall face that fully and equably rubs, and reaches to make the frictional electrification effect of uniform.In addition, owing to change spiral duct 18 into serpentine around the mode of revolving, when going out when its flow passage spiral upset, flow in wherein powder and also be subjected to the effect of overturning and stirring, thereby make powder obtain more uniform rubbing machine meeting, with the electrostatic potential value increase, can improve the effect of coating greatly.

The utility model is novel structure not only, and can produce very good effect, for the coating industry provides product of new generation.

Claims

1; a kind of powder-coating spraying gun; has a lever type spray gun shell; two center mains are housed in the inner space of shell; the end of lance tube is connected with a coating powder suction line with an air-compressed gas input pipe; gases at high pressure and powder are separated into several passages by a shunt plate after entering lance tube; and the same number of several spiral ducts of runner are around being threaded onto between two center mains; the other end of lance tube spirals; each spiral duct has the mobile road of hollow; this flow passage is connected respectively with each access opening of shunt plate; spiral duct converges at the spray gun exit at last; make the powder sprayed coating that has static through high-speed friction on object surfaces; form one and be coated with the table protective layer, it is characterized in that: described spiral duct is around the serpentine of the spatial shape of revolving two center scholar's pipes for staggered commutation.

2, powder-coating spraying gun as claimed in claim 1 is characterized in that described gases at high pressure input pipe is connected in the positive rear end of lance tube, constitutes straight line with the spray gun pipe shaft.

3, powder-coating spraying gun as claimed in claim 1 is characterized in that described powder suction line is connected on the sidepiece that lance tube is connected on lance tube, constitutes an angle with the spray gun pipe shaft.