User Guide Dual Action Hand Spray Gun HB-86, HB-35 & DJ-10

8/13/2019 User Guide Dual Action Hand Spray Gun HB-86, HB-35 & DJ-10

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Roll & GripPushkar, 19 Rajendranagar, Navi Peth, Pune 411030, IndiaPhones : 91-20-24532548, 24538441, Fax : 91-20-24538441

Email : [email protected] , [email protected] : www.rollandgrip.com

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Getting

best

out

of

your

Dual

Action

Hand

Spray

Gun

ModelsHB86xxx,HB35xxx&DJ10xxx

TheDualActionHand SprayGun is designed to give airblast fordie cleaning and

sprayof diecoat.Partiallypressing thehandlegivesairblas t forblowingaway scales

or forblowingaway excessdie coat.Pressing thehandle fullygives sprayof die coat.

The Dual Action Hand

SprayGun

has

two

Hose

Connectors: one for

compressed air and the

other for liquid (die coat).

Air is stamped on the

right front side of thebody

to indicateairpath.TheAir

Hose Connector is longer

than Liquid Hose

Connector. For standard

models use braided hose pipe of 8 mm inside diameter for both air and liquid

connections.ForXT modelsusehosepipeswith BSP(G ) connectors.Thequantity

of the die coat canbe controlled usingbrass Liquid Control Valve located near top

surfaceof thebody.Forpartnamesandpartnumbersplease referExplodedviewand

SparePartsList.ForDualActionHandSprayGunmodelnamespleasereferourDual

ActionHandSprayGunOrderingGuide

For

al l

the

models

except

DJ

10

xxxPF

the

die

coat

can

be

supplied

using

gravity

feedingarrangementor PressurefeedingArrangement.FormodelDJ10 xxxPFdiecoat

shouldbe suppliedusingpressurefeedingarrangement.Enclosedpleasefindschematic

diagramsof thegravityandpressure feedingarrangements.Alsoenclosed is schematic

diagram of Pressure FeedContainer. For gravity feeding arrangement,place the open

diecoatcontainerat heightof minimum8 to 10 feetabove spraygun level.Forbigger

dies where requirement of die coat is higher pressure feeding arrangement is

recommended. Also where the die coat is a suspension then pressure feeding

arrangement may be needed since it is inconvenient to stir the die coat kept in a

containerat

height.


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When using pressure feeding arrangement care should be taken to keep the liquid

supply pressure as low as possible. At higher liquid pressures the discharge from

pressurefeeding tank is veryhighwhichmaycauseovercoolingof dieandwastageof

diecoat.Theliquidsupplypressureof 0.2kg/cm2is alsosufficientto providenecessary

liquid discharge. For little increase in liquid pressure there is more increase in

dischargefrompressurefeedtank.

Theair

pressure

should

be

above

5Kg/cm2 for

powerful

air

blas t.

Blasting

effect

increases at higher air pressures and higher air volumes. Supply compressed air

directly from air supply line to the spray gun with least number of connectors in

between. It is not advisable to use quick release couplings for air, since it causes

reduction in airblas t. Any obstruction in the airpassage causes reduction in blasting

effect.When usingmodelHB 35 andwhen gentle spraying is desired the air canbe

suppliedat @2Kg/cm2.

In modelDJ10 xxx theairpressureand liquidpressureneed to be ba lanced. If theair

pressure is muchhigher than liquid supplypressure then the airmaypush the liquid

back in the liquid supply line. In that case the air supply pressuremay need to be

reduced to overcome the problem of liquid backing out. Alternatively increase the

liquid supply pressure to avoid backing out of die coat. For model DJ 10 xxxPF

pressurefeedingarrangement is required as liquidat higherpressure is needed.To get

effective spray, increase the liquid supply pressure and/or reduce the air supply

pressure.

Theatomizationof liquid(diecoat)dependson airpressureanddiecoatquantity.The

fineness of atomization is directly proportional to air pressure and inversely

proportional to liquid quantity. Reduction in air pressure gives coarse atomization.

Similarlyhigher liquiddischargequantitywillgivecoarseatomization.The spraygun

nozzle is essential for effectiveblastand effective atomisationof die coat.Replace the

nozzlewhendamaged.


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Thecommonproblemfacedwiththespraygunis lessor no liquidbe ingsprayedandin

majorityof

cases

the

cause

is

foreign

matter

(like

cotton

waste

threads)

accumulation

in

theliquid passageof thespraygun.Careshouldbe takenwhilepreparingandhandling

diecoat to avoid foreignmatter getting in thedie coat. Alsowhere thedie coat is a

suspension thedie coat shouldbe filteredbefore use.Suspensionshave a tendency to

coagulate and lumps such formed can obstruct thedie coat flow.Onemay experience

intermittent / cyclic spraying. This happenswhen less liquid is be ing supplied to the

spraygun.Increasetheliquidsupplypressureand/orflowto overcomethisproblem.

On themachine,betweenoperationcycles,TheDualActionHandSprayGunneedsto

be stowed. Rest the spray gun on some round object/bar by placing the round bar

between handle of the spray gun and body. Do not hang the spray gun by the

aluminiumpipe as it couldputunnecessary loadon the aluminiumpipe causing it to

getbend .

When the spray gun is not going to be used for more than a few hours, like on

weekends,it

is

advisable

to

clean

the

liquid

path

in

the

spray

gun

to

avoid

drying

of

diecoat in thespraygun.For flushing the liquidpath,shutof fairsupply to thespray

gunbutkeepthe liquidsupplyon. Useasuitableflushing liquid insteadof regulardie

coatandoperate the spraygun for some time.Forwaterbaseddie coatsjust flush the

liquidpath thoroughlyby plainwaterso thatno traces of diecoat remain in thespray

gun.Foroi lbaseddiecoatsusesuitableliquidslikekeroseneto flushtheliquidpath.


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Schematicof GravityFeed arrangement

Spray gun

Air from

compressor to

spray gun

Overhead tank

for die coatatleast 8 feet

higher than the

spary gun

Die coat to

spray gun


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Schematicof Pressurefeedarrangement

Air

from

compressor

Pressure feed

container

Spray

gun

die

coat

under

pressure

to

spraygun

air to

spraygun


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Schematicof PressurefeedTank

Liquid Out

to gun

Flange with

4 - 6 bolts

Pressureregulator with

pressure gaugefor air to tank

Agitator

(Optional)

Air to Gun

Air from compressor

SteelTank


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Dismantling&AssemblingtheDualActionHandSprayGun

HB86xxx/HB86xxxXT,HB35xxx/HB35xxxXT&DJ 10xxx/DJ10xxxXT

ToolsandmaterialNeeded:

1. BenchVicewithjawslinedwithsoftmaterial.

2. SideSpanner14 15

3. Pliers.

4. ScrewDriver

5. Pointedblade(forremovingExternalcirclip).

6. Smallrodof diameter lessthan6mm (forpushingthePlungeroutfrom the

spraygunbody).

7. Teflontape(threadsealtape).

ProcedureForDismantling TheDualActionHandSprayGun:

Make sure that the jaws of the bench vice are lined with soft metal sheet (like

aluminium)to

avoid

damaging

the

spray

gun

body.

Also

while

holding

the

spray

gunbody in vice, alwayshold it on mainportionof thebody.Themainportion is

wheretheserialnumberis stamped.

1. Restthespraygunon it ssideon thetabletop.

2. Usingapointedbladeremoveone Circlip(208023). Takecareto avoidthecirclip

flyingoff.Thecirclipis Ctypewith3.2mm nominaldiameter.


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3. Push thehandlepin (208022) throughhandle (208021)andbody and thehandle

willcome

loose.

4. With the side spanner 14 loosen the lock nut for spray nozzle (208639) and

unscrew the spray nozzle (HB86 :208638,DJ 10 : 208403,HB 35 : 209114) along

withthelocknut.

5. UsingscrewdriverunscrewtheLiquidControlValve(208032).

6. Hold the spraygun in thebenchvicewithHose

Connector side pointing down. Refer adjacent

figure.Check

that

there

is

some

gap

between

the

LiquidControlValveendof thebody and topof

thebench vice.

7. Usingsidespannersize15 ,loosenthelocknutof

thealuminiumpipe(208045).

8. Remove thegunbody fromthevice.

9. Unscrew the aluminium pipe (HB86 300&HB

35300

:208036

,DJ

10

300,

HB

86

300ST

&

HB

35 300ST: 208038) till it comes out loose. Formodelswith different lengths of

aluminiumbend and straightpipes, thepartnumbersof thosealuminiumpipes

aregivenin PartList.

10.Unscrew the plastic pipe (HB86 300&DJ10 300 : 208035,HB 35 300 : 209111)

fittedin thebrasspipe(HB86 &DJ 10 :208034,HB 35 :209113). Theplasticpipe

may get unscrewed alongwith the aluminium pipe. Formodelswith different

lengths of aluminium pipes, the

partnumbers

of

those

plastic

pipesaregivenin PartList.

11 .Using pliers, unscrew the brass

pipe from the gun body. Take

care to use the round holding

jaws of the pliers for removing

the brass pipe. Otherwise, the

brass pipe may get flattened.

Referadjacent

figure.


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12.Hold the body in the vice with Hose Connectors

pointingupward.

Refer

figure

on

the

right.

13.Ensure that there is gapbetween lower side of the

vice jaw and Liquid Control Valve end of the gun

body.Also, ensure that no other portion of the gun

body is touching the

bench vice. Refer

figureon theleft.

14.Using

side

spanner

size 14 unscrew the

Air Hose Connector

(For std. model

208030, For XT model : 208041 ). Air Hose

Connectoris longerthanliquidHoseConnector.

15.Similarly unscrew the liquidHose Connector (For std.model : 208031, For XT

model :208043).

16.Underneaththe

Hose

Connector

is

ataper

spring

(208029).

While

removing

Hose

Connectorthespringtendsto popup theHoseConnector.

17.Remove andcleanthesprings.

18.Remove thegunbody fromthebench vice.

19.Pushtheprotrudingportionof theAirPlunger(208025)in thegunbody.Usinga

rodof diameter lessthan6mm pushthePlungertill it fallsoutof thegunbody.

The Plunger, Rubber Washer (208027)and Spring Seat (208028) form a sub

assembly.The

Spring

Seat

may

get

loosened

from

the

Plunger

while

unscrewing

theHoseConnector.

20.SimilarlyremovetheLiquidPlunger(208024).

21.UnscrewSpringSeatfromthePlunger.TheRubberWasherfitsin therecess

providedintheSpringSeat.

22.Cleantheremnantsof Teflontapefromthethreadsofthegunbody.

23.TheOringsforPlunger(208126)arefittedinsidethebody.TheseOringsneed

notbe

removed

while

cleaning

the

spray

gun.

However,

in

case

the

O

ring

is

to


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be replacedthenthesamecanbe removedusingabluntflattenedbend wire.

Pushthe

flattened

wire

in

the

groove

under

the

O

ring

and

push

the

O

ring

out.

24.Clean/degreasethegunbody andal lthepartsthoroughlyusingsuitable

cleaningliquidse.g.kerosene.

25 .Forcleaning the internalairpassage,blow compressedair in thegunbody from

the aluminium pipe side, from Plunger holes of the body and from Hose

Connectorside.

ProcedureforassemblingtheDualActionHandSprayGun

1. Assemble thePlunger,RubberWasher and Spring Seat.The Spring Seat should

be slightlytightenedsuchthat it is holding thewasherfirmly withoutdistorting

it s shape.Over tightening of the Spring Seatwould distort the Rubber Washer

thereby restricting the air/liquid passage. Replace worn out / cracked Rubber

Washerwithnewif needed.

2. TheAirPlunger andLiquid Plunger aredifferent.AirPlunger is longer and it s

diameterof thestepnearthreadingis bigger thanthatof theLiquid Plunger.

3. Push theAirPlungerassembly in theaircavityof thespraygun.Theair side is

the right hand side of the spray gunwhen the gun is held horizontalwith the

stamped serialnumberat the topandaluminiumpipe side facingaway. Air is

alsostampedon therightsideof thegunbody nearLiquidControlValve.

4. UsingthetaperspringpushthePlungeruntilit comesoutofthefrontsideof the

spray

gun

body.

5. Put the taper spring in the gun such that the small diameter is resting on the

SpringSeatandthebigger diameteris againsttheHoseConnector.

6. Holdthebody in thebenchvicewithHoseConnectorsidepointingupward.

7. Ensure that there is gapbetween lower sideof thevicejaw andLiquid Control

Valvesideof thegunbody.Alsoensurethatno otherportionof thegunbody is

touchingthebenchvice.

8. Wrapalittle

Teflon

tape

(thread

seal

tape)

on

the

threads

of

Air

Hose

Connector

followingrighthandthreadpatternandfi t it in thegunbody.CheckthatTeflon


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tape is onlyon the threadsandnotover theholeof theHoseConnector.A little

pressureis

needed

to

hold

and

push

the

Hose

Connector

in

place

till

the

Hose

Connector threadsengagewith thegunbody threads.Forboth theXT connector

thethreaded portionsaredifferentin length.Thelongerthreadedportiongoesin

thespraygunbody.

9. TightentheHoseConnectorusingsidespannersize14.

10.Similarly fi t the liquidHoseConnector.Forboth theXT connectorsthe threaded

portions are different in length. The longer threaded portion goes in the spray

gun

body.

11.Usingpliers tighten thebrasspipe.Take care to use the roundholdingjaws of

the pliers for tightening the brass pipe. Otherwise, the brass pipe may get

flattened.Alsodo notovertightenthebrasspipe.

12.Remove thegunfrom benchvice.

13.Fi t theplasticpipe in thebrasspipe. If replacingplasticpipe,note that thenew

plasticpipeis longerandneedsto be cutat thetimeof assembly.

14.Pushthe

aluminium

pipe

over

the

plastic

pipe

&

brass

pipe

till

it

is

within

1cm

of thegunbody face.

15.Apply oil (Lubricating oil) to the internal threads of the gunbody and to the

externalthreadsof thealuminiumpipe.

16.Theoilis mostessentialto avoidcoldweldingof aluminium(pipe)to aluminium

(Body).

17.Screw thealuminiumpipein thegunbody.

18.Holdthe

gun

body

in

bench

vice

with

Hose

Connectors

facing

down.

Check

that

there is somegapbetween theLiquidControlValveendof thebody and topof

thebenchvice.

19.ForHB 86 &HB 35 adjustthealuminiumbend pipesuchthatthebendendof the

pipeis facingthehandlesideof thebody.

20.Tightenthelocknutof thealuminiumpipeusingsidespannersize15.

21.If newplasticpipe is fitted thencut theextra lengthusingasharpbladeso that

plasticpipe

of

length

@2

3mm

is

protruding

from

the

aluminium

pipe

end.


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22.Fi tthespraynozzleand lock the locknutwithsidespanner14.ForDJ 10 model

thespray

nozzle

should

be

adjusted

such

that

the

spray

is

in

the

vertical

plane

whenthespraygunis heldwithhandlesidedown.

23.Fi ttheLiquid ControlValveusingascrewdriver.ReplaceOringif needed.

24.Fi tthehandleandhandlepin.

25.Placethecirclipin thegrooveof thehandlepinandsnapit usingpliers.

26.NowtheDualActionHandSprayGunis readyforuse.

User Guide Dual Action Hand Spray Gun HB-86, HB-35 & DJ-10

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Transcript of User Guide Dual Action Hand Spray Gun HB-86, HB-35 & DJ-10