Buhnen HB 450 Operational manual

Translation of the original Operating Manual
Hot Melt Applicator
HB 450/HB 450 Spray
H2188XM (Release 07-2016)

2
1 General 4
1.1 Scope of use 4
1.2 Technical data 4
2 Safety instructions 5
2.1 Potential hazards 5
2.2 Instructions for safe operation 5
3 Starting 6
3.1 Connecting up 6
4 Operation 7
4.1 Operating position 7
4.2 Charging 7
4.3 Discharging and metering melt 7
4.4 Adjusting the spray pattern (HB 450 Spray only) 8
4.5 Switching off 8
5 What if... 9
5.1 Troubleshooting 9
6 Servicing/maintenance 10
6.1 Service intervals 10
6.2 Cleaning 10
6.2.1 Cleaning the nozzle 10
6.3 Nozzle systems 11
6.3.1 Replacing the cone nozzle (HB 450) 11
6.3.2 Replacing the nozzle end (HB 450) 11
6.3.3 Replacing the swirl nozzle, pressure spring & ball (HB 450 Spray) 12
6.4 Adjusting the cover pressure 12
6.5 Replacing the cover gasket 13
6.6 Replacing the valve assembly 14
6.7 Replacing the (complete) cover 15
7 Repairs 16
8 Warranty 16
9 Disposal 16
10 Diagrams 17
10.1 Wiring diagram 17
10.2 Pneumatic diagram 18
11 Accessories 18
Table of Contents

3
Arrangement
Applicator
HB 450 Spray HB 450
2
3
4
5
6
7
8
A
AA
1
Pos. Description Pos. Description
1 Start/Stop button 5 Spray air choke
2 Lever 6 Trigger
3 Closure cap 7 Handle
4 Suspension hook 8 Stand foot
USA

General
4
1 General
Please read this Operating Manual through carefully and completely before rst using the
Applicator. Pay particular attention to the safety instructions in Section 2.
This Operating Manual must always be within easy reach for any user.
1.1 Scope of use
The HB 450/HB 450 Spray Applicator is for the melting and metered discharge of melts
(thermoplastic substances such as hot-melt adhesives, waxes, etc.) as a bead (HB 450)
or spray-on coating (HB 450 Spray) using interchangeable application tools (use as
intended).
1.2 Technical data
Model HB 450 HB 450 Spray
Part No. H218800 H218850
Kit includes Applicator, toolset
Weight [lbs] ~2.75 ~3.20
Power connection 115V AC / 60 Hz / earthing-pin plug
Power requirement [W] 600
Power consumption [A] 2.6
Protection (as per DIN IEC 34 T5) IP30
Safety class
(as per DIN VDE 0720)
I (safety earth terminal)
Temperature control Bimetal
Temperature limitation [° F] thermal cut-out (307 ±41)
Operating temperature [° F] 356 constant
Temperature constancy [° F] ±45
Factory presetting [°F] 356
Warm-up time [min] ~10.0
Hot-melting capacity (dependent
on melt) [lbs/h]
with slugs: 7.0
with granulate: 2.9
Capacity of melt reservoir [ml] 200
Conveyor system compressed air
Compressed-air connection max. 87 psi (6 bar)
The compressed air must be condensate- and acid-free
Operating pressure 21.7 to 87.0 psi (1.5…6.0 bar)
Air consumption
(at 72.5 psi / 5 bar
operating pressure)
1 l per trigger actuation max. 1 l/s
Nozzles (standard) cone nozzle Ø 1.5 mm swirl spray head Ø 1.5 mm
Length of supply line with
electrical and pneumatic
connections [m]
3.0
Recommended melting stock BÜHNEN hot-melt adhesives in plug or granular form
USA

Safety instructions
5
2 Safety instructions
2.1 Potential hazards
Danger!
Never point the operation-ready device at people.
Danger from high pressure!
Burn Hazard
Nozzle (1) and molten adhesive can be over 392° F (200° C) hot.
Wear heat-resistant gloves if contact is unavoidable.
Risk of Explosion!
When working with oxygen or combustible gases there is risk of explosion!
Xi Odor nuisance!
Hot-melt adhesives give off fumes which can cause odour nuisance – so ensure
adequate ventilation.
Improper use may in isolated cases lead to irritation of the mucous membrane. In this
case seek immediate medical advice!
2.2 Instructions for safe operation
Guard against malfunctions and operating errors by always following these instructions
precisely:
• In no circumstances may the maximum permitted operating pressure (87 psi, 6 bar) be
exceeded.
• Remove combustible or heat-sensitive objects from the area of the nozzle.
• When warm the device must be put down on the stand foot (8) or, alternatively on the
working console (see section 11, Accessories). It must not be laid on its side.
Otherwise melt may escape uncontrolled through the vent holes and present a burn
hazard.
• Never operate the trigger (6) forcibly.
• Protect the device from moisture and damp (protection against electric shock).
• Observe the instruction leaet for the hot-melt adhesive (protection against processing
errors).
• Operate the device only with the nozzle pointing downwards. It must not be operated
above head height!
• Unplug from the mains before performing any operation on the device (servicing,
cleaning).
• The device must be powered only from sockets with a protective conductor.
• Any extension cable used must have a protective conductor. Check that the protective
conductor is undamaged before use.
• Unplug from the mains after each use. Allow the device to cool down completely before
putting it away.
• If you notice any damage to the device or leads, unplug from the mains immediately.
Have the device promptly checked over by an expert. It must not be used again until it
has been properly repaired (see Sections 6 and 7).
USA

Starting
6
3 Starting
3.1 Connecting up
To connect up the device proceed as follows:
1. Mount the stand:
Fig. 3/1: Mounting the stand foot
• To do so, insert the stand foot in the recess at the housing.
• The stand foot must engage.
2. Place the device on the base and stand foot.
3. Mount the device to a pressure regulator (see accessories). The device may be
operated with a maximum pressure of 87 psi / 6 bar.
4. Set the operating pressure to 58 psi / 4 bar with the pressure regulator (3).
5. Connect the mains plug to a socket outlet with earthing contact.
6. Switch on the device.
The device is now ready for use.
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Operation
7
4 Operation
4.1 Operating position
The device may be operated only with the nozzle pointing downwards. In other
positions melt may get into the compressed-air ducts and damage the device.
Fig. 4/1: Permitted operating position
4.2 Charging
Burn hazard!
Nozzle and molten adhesive can be over 392° F (200° C) hot. Always wear heat-resistant
gloves when performing the steps described below.
The adhesive can be relled as soon as the ll level has dropped below the reserve in the
tank or below the marking on the outside of the housing.
1. Place the device in the working bracket or on the base.
2. Switch the device on. Wait approx 10 min. until the working temperature has been
reached.
3. Take hold of the device by the handle with one hand (7). With the other hand turn the
lever (2) clockwise through 180º and swivel the closure cap open.
4. Fill the tank to a level not less than 2 cm below the rim. The maximum level is marked
on the device with a sticker (see illustration left). Do not charge the device above this
level since the melt expands when heated.
5. Swivel the closure cap back. Turn the lever (2) anticlockwise as far as it will go, in
order to lock the cap.
4.3 Discharging and metering melt
1. Place the device in the working bracket or on the base.
2. Switch the device on. Wait until working temperature has been reached.
3. Check that there is enough melt in the tank.
Burn hazard!
If the device is “run dry” drops of melt may escape uncontrolled and endanger the
operator and persons in the vicinity.
Every time you actuate the trigger, therefore, rst carry out step (3.) above.
4. Actuate the trigger (6)
You can meter the quantity discharged by altering the pressure (max. 87 psi / 6 bar) at
the pressure regulator and/or selecting an appropriate nozzle.
max. Level
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Operation
8
5. After the trigger (6) has been released the compressed-air supply is cut off
immediately and the tank vented.
4.4 Adjusting the spray pattern (HB 450 Spray only)
The spray pattern is altered by adjusting the spray air.
Set the optimum spray pattern by turning the spray-air choke (5) in the protective sleeve
(Opening on the side in the left housing half):
• Turning it clockwise decreases the spray-air pressure.
• Turning it anticlockwise increases the spray-air pressure.
4.5 Switching off
1. Press the Start/Stop button (1).
2. Adjust the operating pressure down to “0” with the pressure regulator or disconnect
the compressed-air supply.
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What if...
9
5 What if...
This Section summarises the status and error messages and provides help in eliminating
errors.
If malfunctions occur please check rst
• that the power supply and compressed-air supply are functioning correctly, and
• whether there is mechanical damage to the device or supply lines (power supply,
compressed air).
If you nd any mechanical damage, the device may in no circumstances be started up
again. Have it checked and repaired by a qualied service agent.
5.1 Troubleshooting
Fault Possible cause Remedy See Section
Nozzle goes on dripping Nozzle valve partially
obstructed or damaged
Drain the device. Actuate
the trigger for approx. 5 s to
clear the nozzle.
HB450:
Clean or replace nozzle end
HB 450 Spray:
Clean or replace swirl
nozzle, pressure spring and
ball
6.2
Too little or no melt is
discharged
Operating pressure too low Increase operating pressure
(max. 87 psi / 6 bar)
4.3
Compressed-air supply
disconnected
Check compressed-air
supply
Nozzle system clogged HB450:
Clean or replace cone
nozzle and if necessary
nozzle end
HB 450 Spray:
Clean or replace swirl
nozzle, pressure spring and
ball
6.2, 6.3
Compressed air escapes from
closure cap (3)
Insufcient cover pressure Increase cover pressure 6.4
Gasket dirty Clean sealing faces
Compressed air escapes from
service unit
Connections not airtight Tighten or replace gaskets
HB 450 Spray only
Spray pattern not ideal Spray pattern wrongly set Adjust spray air 4.4
Nozzle system clogged or
damaged
Clean or replace swirl
nozzle, pressure spring and
ball
6.3.3
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Servicing/maintenance
10
6 Servicing/maintenance
Danger!
Danger due to inadvertent triggering.
Disconnect the compressed air supply before all maintenance and service work.
Danger!
Voltage hazard.
All operations which necessitate opening the device may be performed only by qualied
electricians.
Burn hazard!
Nozzle (1) and molten adhesive can be over 392° F (200° C) hot. Wear heat-resistant
gloves when performing servicing and maintenance operations.
6.1 Service intervals
Observe the stated service intervals to ensure always correct and reliable operation:
Weekly: Check that all parts are present, leak-free and undamaged and all screws and lines securely
seated
Remove adhesive residues and other contaminants, especially on the inside of the cover
6.2 Cleaning
• Do not use aggressive cleaning agents for cleaning the device. These may damage device
components.
We recommend cleaning with parafn oil.
• Replace completely parts which are no longer cleanable (e.g. because of burnt-on or reacted
hot-melt adhesive). We recommend having this work done by the manufacturer or distributor.
• Remove residues of hot-melt adhesive and other contaminants by mechanical means only,
e.g. with a cloth, soft brush, wooden spatula or similar.
6.2.1 Cleaning the nozzle
• Wipe the nozzle with a cloth to remove slight external dirt.
• To remove blockages insert a drill bit, needle or wire of suitable diameter into the
nozzle orice.
In stubborn cases replace the nozzle (see Section 6.3).
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Servicing/maintenance
11
6.3 Nozzle systems
HB 450 HB 450 Spray
Valve seat
Nozzle foot
Nozzle block
Pressure spring
Air cap
Cap ring
Swirl nozzle
Cone nozzle
Fig. 6/1: Nozzle systems in detail
6.3.1 Replacing the cone nozzle (HB 450)
Tools needed • 2 open-end spanners size 19
1. Disconnect the compressed air supply.
2. Let the device heat up thoroughly.
3. Secure the nozzle foot (A2) and unscrew the cone nozzle (A1).
4. Screw on the new cone nozzle (A1) by hand rst and allow to heat up for 2 minutes.
5. Re-secure the nozzle foot (A2). Tighten the new cone nozzle (A1) without using force.
6.3.2 Replacing the nozzle end (HB 450)
Tools needed • 2 open-end spanners size 19
There must be no melt at all in the tank when the nozzle end is replaced.
Therefore discharge the melt completely, e.g. into a collecting vessel.
1. First, proceed as described in chapter 6.3.1 up to Point 3 (dismantling the nozzle).
2. Unscrew the nozzle foot (A2).
3. Screw on the new nozzle foot handtight. Now tighten lightly (without using force) with
the open-end spanner.
4. Assemble the cone nozzle (A1).
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Servicing/maintenance
12
6.3.3 Replacing the swirl nozzle, pressure spring & ball (HB 450 Spray)
Tools needed • 1 hook spanner
• 1 open-end spanner size 11
There must be no melt at all left in the tank when the nozzle end is replaced. Therefore
discharge the melt completely, e.g. into a collecting vessel.
1. Disconnect the compressed-air supply.
2. Release the cap ring (B1) by turning it when warm without using force.
3. Remove the air cap (B2).
4. Loosen the swirl nozzle (B3) with the open-end spanner size 11.
5. Remove the pressure spring (B4) behind the swirl nozzle and the ball (B5).
6. Fit the new components in reverse order.
6.4 Adjusting the cover pressure
Tools needed • 1 hexagon socket spanner size 1.5
• 1 hexagon socket spanner size 2,5
• 1 hexagon socket spanner size 3
Fig. 6/2: Adjusting the cover pressure
1. Rotate the lever (C3) clockwise and swivel the cover until fully open.
2. Loosen the lever xing screw (C4) with the hexagon socket spanner SW3.
Withdraw the screw.
3. Loosen the clamping screw (C1) with the hexagon socket spanner size 1.5 (approx.
1.5 turns).
4. Insert the hexagon socket spanner size 2.5 into the adjusting screw through the lever
screw-hole. Turn the adjusting screw clockwise initially by approx. 90°.
5. Close and lock the cover.
If the cover will not close, keep turning the adjusting screw back (clockwise) by
approx. 15° until the cover closes easily.
6. Actuate the trigger.
• If the cover now closes correctly, proceed at step 7.
• If the cover still does not close correctly, repeat the adjustment from section 4.
7. Open the cover again.
8. Tighten the clamping screw (C1).
9. Fit the lever xing screw (C4).
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Servicing/maintenance
13
6.5 Replacing the cover gasket
Tools needed • 1 Phillips-type screwdriver size 1
Position carefully when assembling
Fig. 6/3: Replacing the cover gasket
There must be no melt at all left in the tank when the cover gasket is replaced. Therefore
discharge the melt completely, e.g. into a collecting vessel.
1. Let the device heat up.
Continue activating the trigger until the tank is completely empty.
2. Disconnect the compressed air supply.
3. Disassemble the entire closure unit (see Chapter 6.7).
4. Release the fastening screws (D1) of the sealing plate (D2) with the Phillips
screwdriver. Carefully remove the sealing plate.
5. Carefully remove the gasket (D5) from the pressure plate (D6).
6. Set the new gasket in the pressure plate in such a way that it ts evenly all over.
7. Mount the sealing plate. Observe the position of the washer (D3) and the O-ring (D4)
of the ventilation opening. Tighten the counter nuts (D1) alternately.
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Servicing/maintenance
14
6.6 Replacing the valve assembly
Tools needed • 1 hexagon socket spanner size 2.5
• 1 hexagon socket spanner size 3
• 1 auxiliary screw M4
Fig. 6/4: Replacing the valve assembly
1. Let the device heat up. Continue activating the trigger until the tank is completely
empty.
2. With the cover closed undo the xing screw (E1) of the lever (E2) with the hexagon
socket spanner size 3. Remove the lever and carrier (E3).
3. Undo the screws (E4) with the hexagon socket spanner size 2.5. Remove the cover
casing (E5).
4. Screw the auxiliary screw M4 in to the clamping piece (E7). Release the clamping
screw (E6) with washer with a 2.5 mm Allen key. Carefully remove the clamping piece
with auxiliary screw M4 from the valve housing. Also remove the spring (E8) and the
cone (E9).
5. Decrease the pressure to 14.5...29 psi / 1...2 bar. Briey actuate the trigger. The burst
of pressure ejects the valve (E9) and spring (E10) from the valve housing. Hold a cloth
in front of the opening to catch these (hot!) parts.
6. Fit the new components, cover casing and lever in reverse order.
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Servicing/maintenance
15
6.7 Replacing the (complete) cover
Tools needed • 1 hexagon socket spanner size 2.5
• 1 hexagon socket spanner size 3
• 1 open-end spanner size 13
Fig. 6/5: Replacing the cover
1. Let the device heat up. Continue activating the trigger until the tank is completely
empty.
2. With the cover open undo the xing screw (F1) of the lever (F2) with the hexagon
socket spanner size 3. Remove the lever and carrier (F3).
3. Undo the screws (F4) with the hexagon socket spanner size 2.5. Remove the cover
casing (F5).
4. Release and remove the Seeger circlip ring (F6).
5. Pull the entire closure unit (F7) off from the axle (F8). Carefully set the new closure
unit on the axle.
6. Mount the Seeger circlip ring (F6).
7. Release the counter nut (F9) with the SW 13 open-end wrench.
8. Adjust the tie bolt by twisting it so that its foot slides cleanly into the recess in the
housing when the lid closes. Then retighten the counter nuts. Check again to see if the
cover closes cleanly. If necessary, readjust the tie bolt.
9. Mount the cover casing and the lever.
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Repairs
16
7 Repairs
Repairs other than those described in this Operating Manual may be undertaken only
by persons appointed by the manufacturer or other technically competent persons using
BÜHNEN original replacement parts.
8 Warranty
The device has been developed and manufactured in accordance with the most up-to-
date technical knowledge. We provide the initial purchaser with a warranty according to
statutory requirements for function, materials and processing. Normal wear and tear is
excepted.
The warranty ends if improper treatment, use of force, repairs by third parties or the tting
of non-original replacement parts is evident.
The warranty covers repair or replacement at our discretion. A warranty extending beyond
the kit supplied by us is precluded, since proper and expert use of the device is outside
our control.
Please note our terms of business!
9 Disposal
Pass the device, packing and ttings for environmentally correct recycling/reuse (in
accordance with European Parliament and Council Directive 2002/96/EC of 27th January
2003).
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Diagrams
17
10 Diagrams
10.1 Wiring diagram
5
USA

Accessories
18
10.2 Pneumatic diagram
11 Accessories
Designation Article No.
Rack H217903
Pressure reducer H206426
USA

Declaration of Conformity
19
USA
450

Subject to changes © BÜHNEN GmbH & Co. KG/H2188XM_#A_US/160713/H
Distributed by
PAM Fastening Technology Inc.
Division of Bühnen
Charlotte, N.C. USA
Phone [phone]
Fax [phone]
www.pamfast.com
[email protected]