What Is an Injection Gun?

A spray gun is a device that uses liquid or compressed air for rapid release as power. There are two types of spray guns: ordinary pressure and pressurized. Spray guns also include pressure spray guns, Kallo spray guns, and automatic recovery spray guns.

The spray gun includes a gun body and a gun head, and the gun body and the gun head are connected by a connecting mechanism; the gun head includes a

There are two types of spray guns: ordinary pressure and pressurized.

Spray guns are mainly A, B, C, D, E, F, G

A type, B type, and C type are mainly applicable to nozzles with outer diameters such as 18, 20, 21, 22.5; D type spray guns are suitable for nozzles with outer diameters such as 15, 16, 12.5; E, F types are applicable Horn type

During the spraying operation, improper spray gun operation will affect the spraying effect of the product. Good spraying results are as follows: 1. The coating is evenly distributed 2. The coating must not be too thick or too thin. Some points to note when spraying:

The distance between the nozzle outlet and the object to be coated is called the gun distance. The smaller the gun distance, the greater the spray pressure, and the greater the impact of the product on air pressure. The coating will be uneven, resulting in the problem of excessive thickness. The larger the gun distance, the lower the spray pressure, and the paint is easy to lose, so that the part to be coated is sprayed too little, and the coating cannot reach the specified thickness. The spraying fan surface is perpendicular to the surface of the object to be painted. When manually operating the spray gun, the spray width should not be too large, otherwise the problem of average coating will occur. The purpose of the spray gun running should always be parallel to the surface of the object to be coated, perpendicular to the spray fan surface, unstable running rate, uneven coating thickness, too fast running rate, too thin coating, too slow running rate, and too thick coating. All in all, when using spray equipment, the intensity must be moderate and the distance must be appropriate so that the desired coating effect can be obtained. After the construction, some finishing things need to be improved, and the paint and help equipment must be cleaned up. It is necessary to pay attention to the remaining paint after use to block and retain.

The essentials of spray gun operation include: spray gun moving speed, trigger control, gun distance, and gun holding position, etc., as explained below:

First, spray gun moving speed.

During the spraying operation, the speed of the spray gun has a great influence on the coating effect.

1. If the manual spray gun moves too fast, the surface of the coated object is thin, and it appears thin, poor, and rough;
2. If the manual spray gun moves slowly, the coating on the surface of the coated object must be very late, and it is easy to cause sagging.
3. The optimal moving speed of the spray gun is that the surface of the object to be coated is full, uniform and wet after spraying. This requires operators with some spraying experience to control.
Second, the control of the trigger.
The spray gun is controlled by a trigger.

Spray gun failure countermeasures:

During the use of the spray gun, some problems sometimes occur. Now, we will analyze the phenomenon of the spray gun in detail, and analyze the cause according to the phenomenon to find out the solution.

Here are some examples of common faults and their solutions:

Spray gun left or right

the reason:

1.The fan control hole on the side of the air cap is blocked

Damaged air cap

Countermeasures:

1.Clean atomizing cap

2.Replace the atomization cap

The center of the spray pattern is too thick

the reason:

1.Viscosity of sprayed coating is too high

2.The spray pressure is too low

3.The diameter of the nozzle and the thimble increase and decrease due to wear and tear

Countermeasures:

1. Reduce paint viscosity

2.Increase spray pressure

3.Replace the nozzle set

Spray gun splitting

the reason:

1.Viscosity of coating is too low

2.The spray pressure is too high

3.The inner diameter of the fan control hole is too large

4.Not enough paint

5.Atomization air passage is blocked

Countermeasures:

1. Increase paint viscosity

2. Reduce spray pressure

3.Replace the nozzle set

4.Add enough paint

5.Clean the air passage of the spray gun

Spray gun

the reason:

1.The nozzle is not tightened or installed

2.The needle seal kit is loose

3. Loose connection nut of spray gun (lower pot spray gun)

4.Insufficient paint in the pot

5, the nozzle set is damaged

Countermeasures:

1.Tighten the nozzle or clean and install the nozzle set

2.Tighten thimble seal kit

3. Tighten the connecting nut

4. Supplementary coatings

5.Replace the nozzle set

Gun spray weight up or down

the reason:

1.The air outlet of the nozzle, thimble or air cap is blocked by debris

Damaged air cap or nozzle

Countermeasures:

1.Clean nozzle set

2.Replace nozzle set

Phenomenon: No spray or small amount of paint

the reason:

1.The air supply hole of the gun lid is blocked or the air cap and the suction pipe are severely blocked.

2.No paint in the pot

3.The thimble stroke is too small

Countermeasures:

1.Clean the air supply hole, air cap and suction tube on the pot lid

2. Supplementary paint

3. Rotate the paint flow adjustment knob to increase the stroke of the needle valve

Material leaking from spray gun nozzle

the reason:

1.The thimble sealing nut is too tight

2.There is a foreign object inside the nozzle port

3. Nozzle and thimble are not matched or damaged

4.The thimble return spring is broken or not installed

Countermeasures:

1.Unscrew the thimble sealing nut

2.Clean the nozzle

3.Replace the nozzle set

4. Replace the ejector return spring or install the ejector return spring

Spray gun cannot be adjusted

the reason:

1.The control holes on both sides of the air cap are blocked.

2.Spray regulator is damaged or installed incorrectly

3.The air passage of the control hole of the spray gun fan face is blocked

Countermeasures:

1.Clean air cap

2.Replace the frame regulator or install the frame regulator correctly

3.Clean air passage

Spray gun does not regulate air pressure properly

the reason:

1.The air conditioner is damaged or the air valve is damaged

2.Air valve return spring is broken or not installed

Countermeasures:

1.Replace air regulator or air valve

2.Replace the air valve return spring or install the air valve return spring

Spray gun thimble seal leaks paint

the reason:

1.The thimble seal is worn out

2.The thimble gasket is not installed

3.The thimble seal ring spring is damaged or not installed

4. Loosening of thimble sealing nut

5.The contact between the thimble and the seal is worn

6.The thimble is not compatible with the spray gun

Countermeasures:

1.Replace thimble seal

2. Install thimble gasket

3. Replace or install thimble seal ring spring

4.Tighten the thimble sealing nut

5.Replace the nozzle set

6. Replace the nozzle set matching the spray gun ^[1]