HM Electronics HM2950 Manuel utilisateur

HM2950 Operating Instructions

HULME MARTIN HEAT SEALERS

HULME MARTIN

HEAT SEALERS

www.hulmemartin.co.uk

SAFETY INSTRUCTIONS – HEAT SEALING EQUIPMENT

A. Protection against hazards arising from the electrical equipment

1. Safety warnings and instructions in the operators instruction sheets and

attached to the machine should be followed with care.

2. The equipment has an earthed power cable with integral 5 amp plug to

BS 1363/A fitted with a 5 amp fuse. The panel mounted fuse holder on

the machine is fitted with a 3.15A antisurge fuse for additional

protection. If either fuse fails the reason should be investigated and the

machine inspected and tested to ensure that there are no causative

faults. Higher value fuses must not be used, as they do not provide the

required level of protection.

3. Ensure that the power is switched off and the cable plug is removed

from the supply outlet before any servicing is undertaken on the

product.

4. Increased user safety can be achieved if a residual current device

(RCD) is used in the supply circuit to the heat sealer. This applies

particularly in damp conditions but the equipment must not be allowed

to get wet, either from sealing liquids, cleaning or inclement weather.

Only specially designed water resistant sealers should be used in

these circumstances. Electrical components and internal wiring, unlike

the element assembly, are not all protected by the low voltage safety

transformer, which powers the element.

5. Switch off the power supply when the machine is not attended.

6. The equipment should be regularly serviced and subjected to Portable

Appliance Test procedures in accordance with the Health and Safety

Electricity At Work regulations 1989.

7. It is essential that only approved spares be used for servicing this

equipment. Incorrect element wire can result in excessive electrical

load on internal components, which can lead, to malfunction and

failure.

Note

Hulme Martin Heat Sealing equipment satisfies the Health and Safety

requirements of the Electrical Equipment (Safety) Regulations 1994, CE Low

Voltage Directive 2006/95/EC

B. Protection against non electrical hazards

1. The equipment is designed to be operated on a flat, level surface to

ensure machine stability. In the case of chain operated machines, the

equipment should be securely screwed or clamped to the workbench

using the flanges provided, to avoid dislodging the machine when the

pedal is depressed.

2. Heat sealing machines must not be used for packing flammable or

explosive materials unless specifically modified to do so.

3. When sealing PVC and some other plastic films, which may produce

potentially harmful fumes, adequate airflow ventilation or extraction

may be required.

4. The heating element and jaws can become hot during sealing and

adequate cooling time must be allowed before touching these parts of

the machine.

5. Care should be taken on machines fitted with cutting knives that the

blade is moved to a safe position before attempting to reach between

the jaws. On hand operated machines, which are pivoted at one end of

the pressure bar the knife will slide towards the pivot point when the

pressure bar is lifted. For safety ensure that the blade is positioned at

the pivot end before lifting the pressure bar.

6. A timer allowing a maximum heating time of 4 seconds controls the

heating cycle on impulse sealers. If the timer indicator light does not

go out at the selected time and heating continues, switch off the power

immediately and investigate the fault after removal or disconnection of

the element.

7. Repeated operation of the machine without sufficient cooling time

between cycles can cause accumulative heat build up in the element

resulting in poor seals, damaged elements and excessive temperatures

8. Ensure that hands and fingers are clear of the pressure bar before

actuating the foot pedal. The element will not operate until the

pressure bar is fully closed but some discomfort will result from the

pressure applied manually or by solenoid operated units.

IMPULSE SEALING EQUIPMENT

To ensure that satisfactory sealing performance is achieved and that

service life of consumable spares (such as element wire, Teflon and

rubber pressure pads) are maximised, it is necessary to understand the

operating principles of this type of equipment.

1. To adjust the heat setting for a particular thickness of material, the

power output is not varied, and varying the length of time that the

current passed through the element resistance wire effects adjustment.

The timer control allows infinitely variable time adjustment up to a

maximum of around 4 seconds.

2. When the red heating indicator light goes out the temperature has

reached its maximum and the polythene is molten to effect the weld. It

is important that before allowing the jaws to open for removal of the

polythene a short cooling time is allowed to enable the polythene to

solidify and to regain its original strength. On machines fitted with a

dual timer control, the cooling time can be pre set but on standard

machines with simple heating time control, the operator should allow

sufficient time for cooling before releasing the jaws. Depending on

material thickness a cooling time of 1 to 7 seconds is usually sufficient.

3. To complete the seal in the minimum possible time considerable power

is applied to the element for the short duration of the welding cycle.

The instantaneous temperature reached during the brief cycle is very

high, but close contact of the rubber pressure pad removes excess

temperature and prevents deterioration of the thin Teflon barrier tape.

4. It follows that if the pressure bar is released before the temperature

reduces to a level that the Teflon can withstand, it will deteriorate

rapidly and require premature replacement.

5. For this reason adequate cooling allowance is critical to the service life

of the Teflon. Although capable of withstanding up to 20,000 seals

before replacement, insufficient cooling time can cause burning within a

very short period.

6. If the Teflon is not replaced when showing signs of wear, the polythene

will stick and seal quality will deteriorate. Also the rubber pressure pad

will start to wear and if this is allowed to continue to the stage where

the surface of the pad is burnt and uneven, the resulting ‘air gap’

between the pad and element will reduce heat transfer and cause

further rapid deterioration of the Teflon. Excessive burning will

eventually result also in the element wire requiring replacement.

7. To avoid this ‘ vicious circle’ always operate the machine at the

minimum heat setting consistent with satisfactory seal quality. Allow

sufficient cooling time between each successive seal. When sealing

repetitively at high frequency reduce the heating time from its original

setting to compensate for residual heat build up in the element.

8. The micro switch is set to avoid application of power to the element

until the rubber pad is fully aligned and pressed closely to the Teflon to

allow the necessary heat transfer. The rubber pressure pad is

sufficiently pliable to accommodate several thickness’ of polythene, but

accidental closure onto thicker objects or attempting to seal bubble

pack material and heavy paper laminate gusseted materials will cause

deterioration of the Teflon for the reasons explained previously.

9. The rubber pressure pad, and element wire strip are easily replaceable,

but care in operating and maintenance of the Teflon barrier tape can

extend the service interval before element reconditioning becomes

necessary.

10. If the machine fails to seal, but the on off switch and indicator lights

show that the power and timer circuits are operating correctly, unplug

the element and check the condition of the resistance wire and Teflon.

Simple replacement of these low cost consumable spares will normally

restore the full performance of the equipment.

HM2950 POLYTHENE HEAT SEALER

STAINLESS STEEL

OPERATING INSTRUCTIONS

General

Before connecting the machine to the electricity supply, check the operating

voltage on the name plate attached to the base of the machine.

The wires in the mains lead are coloured in accordance with the following

code:

Green & Yellow Earth

Blue Neutral

Brown Live

Ensure that the machine is correctly earthed and connected to the mains

supply with a 5 amp fused plug.

The heating element operates at a reduced safety voltage and the machine

has its own 3.15 amp internal fuse, accessible at the rear of the body.

The power supply rocker switch on the right hand side of the machine is

marked '0' off and '1' on.

Operat ng Instruct ons

The HM2950 impulse sealer is fitted with a dual electronic timer controlling the

heating and cooling cycle. When sufficient pressure is applied to the pressure

bar, the audible 'click' of the micro switch and the illumination of the red LED

indicator light will confirm that the machine is correctly adjusted and that

power is being applied to heat up the element.

The heating time is variable between 0 and 3.5 seconds using the external

control knob. The cooling cycle is preset internally at approximately 3 4

seconds to ensure that the element is allowed to cool before the pressure bar

is released.

If the pressure bar is released before the LED light goes out, insufficient

cooling can result in premature wear of the Teflon barrier tape and other

consumable spares.

A setting between 3 5 on the control scale should be sufficient for normal

material thickness. If the machine is to be used repeatedly for thicker

materials, additional cooling time should be allowed. It is possible to adjust

internally, the present cooling time up to a maximum of 7 seconds for special

applications where this is required.

Serv ce and Ma ntenance

Replacement of the Teflon barrier tape, which covers the element, simply

involves unplugging the element. The self adhesive Teflon barrier tape can

then be removed and replaced. The element wire is also easily changed, by

removing the two retaining nuts at the bottom of the element to replace the

wire strip. To avoid damage to the transformer it is essential that only element

wire of the correct resistance is used and that it is wired in accordance with

the instructions supplied. Allowing excess wire to touch the metal body of the

machine can damage the electronic timer.

The rubber pressure pad can be removed for cleaning or replacement by

simply pulling it out of the pad retaining channel. Inserting approximately

50mm at each end of the pad holder and evenly working towards the middle

of it should refit the pressure pad. This will avoid the pad falling out during

use.

The machine is stainless steel to prevent corrosion. Although all external

components are fitted with water resistant seals to simplify cleaning and

increase safety and hygiene, the machine is not guaranteed fully waterproof.

The following consumable spares will enable the machine to be serviced as

required.

290 210 Element Assembly complete each

290 203 Teflon Barrier Tape pkt 5

290 205 Rubber Pressure Pad each

290 204 Underwire Insulating tape pkt 5

290 206 Resistance wire strips pkt 5

These machines are supplied with a spare element plugged to the back of the

machine.

When ordering spares please quote the serial number of the machine as

etched on the base plate. If special modifications such as wide seal elements

have been fitted to the machine ensure that the spares department are

informed when ordering these parts.

On/Off

Switch

Rubber pressure pad

Heater Bar assembly

Spare heater bar assembly

Indicator LED

Heating

control

Hulme Mart n Heat Sealers Duty of Care

Directive 2002/95/EC on the restriction of the use of certain hazardous

substances in Electrical and Electronic Equipment(RoHS)

The RoHS Directive stands for "the restriction of the use of certain hazardous substances in electrical and electronic

equipment". This Directive bans the placing on the EU market of new electrical and electronic equipment containing

more than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and

polybrominated diphenyl ether (PBDE) flame retardants.

All machines manufactured from 1

April 2006 comply with the above

directive.

Directive 2002/96/EC on Waste Electrical and Electronic Equipment (WEEE)

The WEEE Directive aims to reduce the quantity of waste from electrical and

electronic equipment and increase its re use, recovery and recycling.

From 1

March 2007 Hulme Martin machines are marked with the ‘crossed out wheeled bin

symbol’ to ensure they are dealt with separately from general waste. We can arrange to

collect machines that are no longer required and ensure they are either recycled or disposed

safely. We will record details of all collected and recycled machines.

WEEE REG No WEE/DB1381SS

Packaging Directive

Directive 2004/12/EC (94/62/EC). Whilst we are not required to register under this directive

we use minimal packaging to ensure your purchase reaches you in a first class condition.

Packaging used has been recycled wherever possible and can be reused or recycled by the

receiver.

EC Declaration of Conformity

Machinery Directive 2006/42/EC

The Low Voltage Directive 2006/95/EC.

Electromagnetic compatibility directive 2004/108/EC.

Our machines comply with the above directives. All new machines are built to

a high standard and subjected to visual and electrical tests at several stages

during their manufacture. Once assembled we produce test seals to ensure

quality standards are met. Finally every machine is Portable Appliance Tested

to ensure electrical safety requirements are met.

ISO 9000 Quality Management

Hulme Martin Heat Sealers Ltd operates from documented quality management systems to ensure we meet our

customers’ requirements. We conform to the required directives as listed above, and our equipment meets CE

requirements. Customers are welcome to visit our factory to inspect our documentation and manuals.

ISO 14000 Environmental Management

Hulme Martin Heat Sealers ensures its activities causes minimal effects on the

environment. We continually monitor our practices to achieve the best possible

improvement on our environmental performance.

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