AD-31 Handguns Manual.pdf - 第6页

6 108 835A Description 3 4 5 6 7 1 2 4203001 Figure 1 T ypical AD-31 Handgun 1. Gun Body 2. Nozzle 3. Pivot Sleeve 4. T rigger 5. Handle 6. T rigger Lock 7. Gun Slot (for hanging gun) Nordson Series AD-31 Handguns may be…

108 835A

Safety

Thermoplastic Hot Melt Material

NOTE: Always refer to the material manufacturer’s

Material Safety Data Sheet (MSDS) or material

information sheet before working with any hot melt

material.

S Ensure the work area is adequately ventilated.

S Do not exceed recommended processing

temperatures. Doing so creates a danger to

personnel due to decomposition of the material.

Equipment and Material Disposal

Dispose of equipment and materials used in operation

and cleaning according to local regulations.

Polyurethane Reactive (“PUR”) Hot Melt Material

NOTE: Always refer to the material manufacturer’s

Material Safety Data Sheet (MSDS) or material

information sheet before working with any hot melt

material.

WARNING: Exercise extreme caution and

always provide adequate ventilation when using

reactive materials.

WARNING: Only use PUR material in units that

are designed to process such material. Using

PUR material in units that cannot process them

can cause damage to the unit and premature

reaction of the hot melt material.

WARNING: PUR material contains isocyanate

ingredients which will irritate skin, mucous

membranes of eyes and respiratory passages.

WARNING: Persons with existing asthmatic

conditions may experience difficulty in breathing.

Because isocyanate ingredients are found in various

concentrations in reactive materials produced by

different manufacturers, it is imperative that the material

manufacturer’s MSDS or material information sheet be

consulted BEFORE using reactive material. Pay

particular attention to the discussion of material toxicity,

health effects, and reactivity condition.

There are certain universal safety guidelines that should

be followed when using any reactive material:

S Recommended processing temperatures must not

be exceeded.

S When handling and using reactive material, always

wear thermally protective gloves and long-sleeved

clothing.

S Wear chemical goggles to reduce the potential of

eye contact.

S Have eye washes available and provide a cold

water source for burn treatment.

S The regular use of barrier cream for hands and face

is recommended for skin protection.

S Do not eat, drink, smoke, or store food in working

areas where PUR material is being processed.

S Wash hands thoroughly after working with reactive

material.

S Remove hot melt material vapors using suitable

extraction ventilation equipment.

S Use appropriate respiratory equipment where there

is the danger of inhaling isocyanate vapors or other

ingredients contained in the PUR material in

concentrations exceeding permissible limit values.

S In case of very high concentrations of harmful

substances, or if you are unsure of the

environmental conditions, respiratory protective

equipment (operating independent of the

surrounding air) must be used.

S Do not operate the unit with PUR materials if you

are unsure that ALL adequate safety measures

have been taken.

108 835A

Description

4203001

Figure 1 Typical AD-31 Handgun

1. Gun Body

2. Nozzle

3. Pivot Sleeve

4. Trigger

5. Handle

6. Trigger Lock

7. Gun Slot (for hanging

gun)

Nordson Series AD-31 Handguns may be used only for

manually dispensing hot melt adhesives, sealants, and

other thermoplastic materials.

The Series AD-31 Handguns include several models for

a variety of dispensing patterns, including solid or

foamed extrusion beads, atomized spray patterns, and

swirl spray patterns. For handling high viscosity or filled

materials, the AD-31 LBS extrusion handgun

incorporates a large ball-and-seat and larger flow paths.

Depending on the applicator design, handguns employ

either a preset thermostatic temperature sensor or an

RTD (resistance temperature detector) sensor. RTD

sensing provides temperature control precision by

reducing temperature fluctuations that could negatively

affect flow and cause char formation. A wide operating

temperature range of 65_ to 230 _C (150_ to 450 _F)

provides additional application versatility.

A typical AD-31 extrusion handgun is shown in Figure 1.

The gun consists of the following components:

S Gun Body

S Handle

S Pivot Sleeve

S Trigger Lock

S Trigger

S Nozzle

S Gun Slot (for hanging gun)

108 835A

Daily Operation

Startup

WARNING: Hot! Risk of burns. Wear

heat-protective clothing, safety goggles and/or

heat-protective gloves depending on the symbol

shown.

1. At the applicator, bring the adhesive to application

temperature.

WARNING: Do not swivel or trigger the gun

while it is cold.

2. Turn on the applicator pump. Adjust the system

hydraulic pressure to the value required for the

application. The recommended adhesive

hydraulic pressure range is 2.41 - 4.83 MPa (350 -

700 psi).

WARNING: For most extrusion applications,

adhesive should not project further than 18 in.

from the nozzle when the gun is fired in the

horizontal position. Otherwise, system hydraulic

pressure may be too high, resulting in poor

pattern control and harm to personnel or

equipment.

3. Place the trigger lock in the unlocked position (see

Figure 2).

4. Aim the handgun so the nozzle is pointing at the

substrate.

5. Begin dispensing adhesive by squeezing the

handgun trigger toward the handle.

6. Stop dispensing adhesive by releasing the trigger.

Shutdown

WARNING: Hot! Risk of burns. Wear

heat-protective clothing, safety goggles and/or

heat-protective gloves depending on the symbol

shown.

1. Place the trigger lock in the locked position

(see Figure 2).

2. Turn off power to the applicator pump as

described in your applicator technical manual.

S Systems with a piston pump:

Reduce pump air pressure to zero and

disconnect the supply air line to the pump.

Place the air pump ON/OFF switch in the

OFF position.

S Systems with a gear pump:

Turn the motor speed dial to 0%.

Place the motor ON/OFF (or START/STOP)

switch in the OFF (or STOP) position.

3. Place the trigger lock in the unlocked position

(see Figure 2).

4203002

Figure 2 Lock Positions

1. Unlocked position 2. Locked position

4. Place a suitable waste container, capable of

withstanding adhesive temperatures of 230 _C

(450 _F), on the floor near the dispensing point.

5. Aim the gun so the nozzle points into the

container.

6. Drain adhesive from the handgun by squeezing

the trigger toward the handle. Continue

dispensing adhesive until system hydraulic

pressure is relieved and the gun is drained of

adhesive. Properly dispose of the drained

adhesive.

7. Place the trigger lock in the locked position

(see Figure 2).

8. Hang the handgun by the gun slot at the top of the

handle.

9. Relieve any residual hydraulic pressure as

described in the following topic.

10. Shut down the applicator as described in your

applicator operator instructions or technical

manual.