Graco 332574D User Manual

Operation - Repair

™

Gun Cutter

Assemblies

For use with the RS Guns.

For professional use only.

Important Safety Instructions

Read all warnings and instructions in this manual and the RS Gun and Cutter, Operation-Repair manual. Save all instructions.

332574D

II 2 G c T6

Contents

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Component Identification . . . . . . . . . . . . . . . . . . . . 4

Cutter, 24E512, External Mix Gun, Series C and

Prior Cutter, 24P681, Internal Mix Gun, Series A . 4

Cutter, 24E512, External Mix Gun, Series D

Cutter, 24P681, Internal Mix Gun, Series B . 5

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Cutter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 7

Premature Blade or Anvil Wear . . . . . . . . . . . . . 7

Anvil and Blade Replacement . . . . . . . . . . . . . . . 7

Adjust Cutter Speed . . . . . . . . . . . . . . . . . . . . . . 8

Adjust Anvil to Cutter Head Tension . . . . . . . . . . 8

Adjust Anvil to Idler Tension . . . . . . . . . . . . . . . . 9

Adjust Blower Air . . . . . . . . . . . . . . . . . . . . . . . . . 9

Adjust Cutter Air Pressure . . . . . . . . . . . . . . . . . 9

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Air Motor Oiling . . . . . . . . . . . . . . . . . . . . . . . . . 10

Replace Anvil . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Replace Blades . . . . . . . . . . . . . . . . . . . . . . . . . 12

Replace Chopper Chute Liner . . . . . . . . . . . . . 13

Replace Muffler Filters

(Kit 24H280) . . . . . . . . . . . . . . . . . . . . . . . . 13

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Air Motor Component Removal . . . . . . . . . . . . . 15

Air Motor Component Installation . . . . . . . . . . . 16

Air Motor Replacement . . . . . . . . . . . . . . . . . . . 17

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Cutter Assembly, 24E512-External Mix,

24P681-Internal Mix with Cutter Heads . . . 18

Cutter Assembly, 24E512-External Mix,

24P681-Internal Mix with Blade Cartridges 20

Air Motor, 24E511 . . . . . . . . . . . . . . . . . . . . . . . 22

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Chopper Air Shutoff, 24F706 . . . . . . . . . . . . . . 24

External Mix Gel Gun to Chop Gun Conversion 24 Internal Mix Gel Gun to Chop Gun Conversion . 24

Oil for Air Motor . . . . . . . . . . . . . . . . . . . . . . . . . 24

Cutter Chop Chutes . . . . . . . . . . . . . . . . . . . . . . 24

Cover and Chutes . . . . . . . . . . . . . . . . . . . . . . . 25

Blade Cartridges . . . . . . . . . . . . . . . . . . . . . . . . 25

Cutter Chute Liner, 16P833 . . . . . . . . . . . . . . . . 25

Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Carbide Resin Seat, 24M833 . . . . . . . . . . . . . . 25

Two Hole Feeder Bar, 24M569 . . . . . . . . . . . . . 25

Cutter Head Kits . . . . . . . . . . . . . . . . . . . . . . . . 26

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 28

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 28

2 332574D

Related Manuals

The following is a list of component manuals written in English. These manuals and any translated versions available can be found at www.graco.com.

Part Description

3A0232 RS Gun and Cutter, Operation-Repair

3A1226 Universal Adapter Kit 257754 Instructions

3A2054 Indy or Formula Adapter Kit 125797 Instructions

3A2079 LPA2 Adapter Kit 125843 Instructions

Related Manuals

332574D 3

Component Identification

Cutter, 24E512, External Mix Gun, Series C and Prior Cutter, 24P681, Internal Mix Gun, Series A

ti21012a

Key:

AA Blade Cartridge AB Cutter Head Assembly Cap AC Anvil AD Anvil Cap AE Glass Feed AF Anvil to Blade Tension

Adjustment Knob

FIG. 1

4 332574D

AG Anvil to Blade Tension

Lockdown AH Air Motor AJ Idler Wheel AK Motor Lock button AL Cover (not shown) AM Chute (not shown) AN Idler Lock Down Screw

Cutter, 24E512, External Mix Gun, Series D Cutter, 24P681, Internal Mix Gun, Series B

Component Identification

Key:

AA Cutter Head AB Cutter Head Clamp Screw AC Anvil AD Anvil Cap AE Glass Feed AF Anvil to Blade Tension

Adjustment Knob

AG Anvil to Blade Tension

Lockdown

AH Air Motor AJ Idler Wheel AK Motor Lock button AL Cover (not shown) AM Chute (not shown) AN Idler Lock Down Screw AP Air Motor Lock Down Screw

FIG. 2

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Setup

1. Engage trigger lock.

2. Install cutter:

a. If necessary, use a crescent wrench to adjust

pivot (541) so that it is parallel to gun front end and the open end points to the front of the gun. See F

IG. 3.

542

ti21008a

541

IG. 3

630

3. Insert glass strands into feed.

4. Adjust anvil to blade tension:

a. Release lockdown (AG). See F

IG. 1 on page 4.

b. Adjust tension knob (AF) as desired.

c. Tighten lockdown (AG).

d. Release idler lock down screw (AN).

e. Adjust idler wheel (AJ) until it touches anvil

(AC).

f. Tighten idler lock down screw (AN).

g. Perform test spray to verify proper cutting of

glass strands.

h. Adjust tension as necessary.

b. Back out screws (630). See F

IG. 3.

c. Install cutter onto pivot so glass feed holes are

on top.

NOTE: Ensure proper engagement of o-ring (542) into the cutter assembly. Verify there is no excess air leakage because it will greatly reduce the performance of the air motor. See F

IG. 3.

d. Tighten screws (630) to lock cutter in place.

e. Adjust cutter dispensing angle and chute angle

as desired.

6 332574D

Operation

Cutter Assembly

FIG. 4

RS guns with a cutter installed have two modes of operation. When the trigger is pulled halfway, material sprays but the cutter is not activated. When the trigger is pulled all the way, the air motor in the cutter is started and glass begins dispensing.

1. Do a bag check to establish a baseline for the current cutter output.

a. Weigh a bag.

b. Dispense glass into the bag for 15 or 30 sec-

onds depending on the output.

c. Weigh the bag to determine glass output. This

is your fiberglass output baseline.

2. Add another strand of roving to the cutter inlet.

3. Engage trigger lock.

To prevent skin injection, engage the trigger lock before adjusting cutter motor.

4. With the trigger lock engaged, rotate the cutter motor (AH) clockwise to decrease speed. See F

4. If necessary, rotate counter-clockwise to increase speed.

5. Do another bag check to determine the new glass output.

IG.

Premature Blade or Anvil Wear

NOTICE

More tension between the anvil and blades leads to the anvil and blades wearing out faster. To prevent premature wear and to maximize anvil and blade life, use the minimum tension required to cut the glass and make small increases in tension when strands are not cut correctly. See Adjust Anvil to Cutter Head Tension, page 8.

The most common causes of premature anvil or blade wear are excessive tension between the anvil and blades, excessive cutter speed, and excessive tension between the idler wheel and anvil. See page 8 for the Adjust Anvil to Cutter Head Tension procedure.

To reduce the cutter speed while keeping the same glass output, perform the following procedure:

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a. Weigh a bag.

a. Dispense glass into the bag for the same

amount of time as in step 1b.

b. Weigh the bag to determine glass output.

6. If the weight does not match the baseline bag weight, adjust the cutter speed then do another bag check. Repeat until the new bag weight matches the baseline bag weight.

Anvil and Blade Replacement

See Replace Anvil and Replace Blades procedures on pages 11 and 12.

Operation

Adjust Cutter Speed

When dispensing a material and glass mixture, the speed at which the cutter spins can be adjusted to ensure the correct ratio of glass to dispensed material.

NOTE: It may be possible to prevent premature anvil and blade wear by slowing the cutter speed and adding an additional strand of roving. See Premature Blade or Anvil Wear on page 7.

1. Determine whether more or less glass is needed.

a. Place bag over cutter chute.

b. Place bag over gun fluid outlet. Try to keep bag

away from the dispense outlet to prevent piercing the bag which will lead to inaccurate dispense measurements.

c. Dispense a 15-30 second shot.

d. Weigh both bags and calculate ratio.

e. Determine whether more or less glass is

needed. Consult material manufacturer recommendations for ratio requirements.

f. If ratio is ok, then no adjustment is needed. Oth-

erwise, continue with adjustment procedure.

Adjust Anvil to Cutter Head Tension

NOTICE

More tension leads to the anvil and blades wearing out faster. To prevent premature wear and to maximize anvil and blade life, use the minimum tension required to cut the glass and make small increases in tension when strands are not cut correctly.

To cut the glass strands, the blades are pressed against the anvil. If the strands do not appear to be getting cut correctly an adjustment may be needed.

To adjust the tension:

1. Engage trigger lock.

2. Disengage the tension lockdown (AG) by pushing towards the front of the gun.

3. Turn the tension knob (AF) on the cutter: counter-clockwise to increase tension, clockwise to decrease tension. See F

4. Engage tension lockdown.

If there is still excessive anvil or blade wear after performing this procedure, see Premature Blade or Anvil Wear on page 7.

IG. 4.

2. Engage trigger lock.

To prevent skin injection, engage the trigger lock before adjusting cutter motor.

3. With the trigger lock engaged, rotate the cutter motor (AH): clockwise to decrease speed, counter-clockwise to increase speed. See F

4. Go to step 1 to test ratio and repeat adjustment as necessary.

5. Tighten the air motor lock down screw to avoid speed changes during operation.

8 332574D

IG. 4.

Operation

Adjust Anvil to Idler Tension

To adjust the anvil (AC) to idler (AJ) tension, the idler position can be adjusted. See F

1. Follow Pressure Relief Procedure found within the RS Gun and Cutter, Operation-Repair manual.

2. Engage trigger lock.

3. Remove cover (627). See page 20.

4. Loosen idler lockdown screw (617) using 3/16 in. hex key.

5. Slide idler to desired position.

6. Tighten idler lockdown screw to lock idler in position.

IG. 4 on page 7.

Adjust Blower Air

NOTE: Blower air adjustment only applies to cutters

shown in F

The cutter has blower air to help keep the anvil cool and to keep the inside of the cover free of debris. The blower air has been factory set to optimize performance of the cutter, however it can be adjusted.

IG. 1, page 4.

Adjust Cutter Air Pressure

Adjust the incoming air pressure according to the table below.

Number of

Strands US Metric

One Strand 50-75 psi 3.4-5 bar, 0.3-0.5 MPa Two Strands 80-125 psi 5.5-8.6 bar, 0.6-0.9 MPa Three Strands 80-125 psi 5.5-8.6 bar, 0.6-0.9 MPa

Use a 3/32 hex allen key to turn adjusting screw (635) counter-clockwise to allow more air flow into the inside of the cover on the cutter assembly. This will affect air motor performance as less air will go to the air motor resulting in slower cutter speeds.

635

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