Leister Twinny T Operating Instructions Manual

LEISTER Twinny T

Combination wedge automatic
hot air welding machine

Please read operating instructions carefully before use and
keep for further reference.

GB

OPERATING INSTRUCTIONS

®

• Overlap max. 125 mm / 5 inch

• Type of seam Welding seams are produced in accordance with
DVS 2225 part I and BAM. Other dimensions are possible
on request

DVS: German Welding Association
BAM: Federal Institute for Materials Research and Testing, Berlin.

The LEISTER Twinny T is a combination wedge automatic hot air welding machine
for overlap welding and manufacturing of films and geomembrane liners in
tunnels as well as in earthwork and civil engineering. The heat transmission
occurs through optimum combination of contact and hot air.

APPLICATION

Type

Heating System

Civil engineering

Tunnel
construction

combination

wedge long

Type of Material Material Thickness

PE-HD, PE-C, PFA, PD, PP
PVC-P, PE - LD, ECB, EVA

0,8 – 2,0 mm

/ 32 – 80 mil

1,0 – 3,0 mm

/ 40 – 120 mil

tube nozzle

short

PE-HD, PE-C, PFA, PD, PP
PVC-P, PE - LD, ECB, EVA

0,3 – 1,0 mm

/ 12 – 40 mil

0,3 – 2,0 mm

/ 12 – 80 mil

LEISTER Process Technologies, Riedstrasse, CH-6060 Sarnen/ Switzerland

Tel. [phone] Fax + 41 41 662 74 16

www.leister.com [e-mail]

2

Danger! Unplug the tool before opening it as live com­ponents and connections are exposed.

Incorrect use of the hot air tool can present a fire and
explosion hazard especially near combustible materials
and explosive gases.

The tool must be operated under supervision. The heat
can reach combustible materials which are out of sight.

For personal protection, we strongly recommend the
tool be connected to an RCCB (Residual Current Circuit
Breaker) before using it on construction sites.

The voltage rating stated on the tool should correspond
to the mains voltage.

Do not touch the element housing and hot wedge
when hot as they can cause burns. Allow the tool to
cool down. Do not point the hot air flow in the direction
of people or animals.

Protect the tool from damp and wet.

FI

120

230

WARNING

CAUTION

TECHNICAL DATA

APPROVAL MARKS

Voltage V~
Power consumption W
Frequency Hz
Temperature °C /°F
Welding pressure N/lbs (pound)
Drive m/min. /feet
Emission level L

pA

(dB)
Size LxBxH mm
Weight kg

Connect the tool to a socket outlet with a protective

earth conductor. Any interruption of the protective

earth conductor inside or outside the tool is dange-

rous! Use only extension cables with a protective earth

conductor!

100, 120, 200, 230 #
1600, 1900, 2200, 2300
50 / 60
max. 560 stepless
max. 1000 stepless
0,8– 3,2 stepless
71
340 × 360 × 245
7,9

(Civil engineering below ground) / 6,9 (tunnel construction)

# mains
voltage
cannot be
switched
over

Protection class Ι

Cross sectional diagram of an overlap weld

Seam thickness reduction = A – B

A : Thickness of the upper and lower membrane
B: Thickness of the welded seam

C : Welded section 1
D: Welded section 2
E : Test channel

B

CD

A

B

E

• Welding Pressure → steplessly adjustable. The welding pressure is transmitted
via a toggle lever to the pressure rollers. The swivel head guarantees the
equalisation of the pressure to both welded sections (C and D) as well as on a
welded seam without test channel.
This allows T-joints to be welded easily. During the welding process the welding
pressure adjusts itself linearly to the change in material thickness of the
geomembrane liner.

• Drive

→ Double drive system, is steplessly adjustable and electronically con-

trolled. The automatic control system with tachogenerator is designed in such
a way, that the adjusted welding speed remains constant independently of
the load. The power transmission to the drive/pressure rollers works through a
three stage planetary gear.

• Heating system

→ The hot air temperature is steplessly adjustable and electro-

nically controlled. The heat transmission occurs with optimum combination of
all the advantages of contact hot air. The flexible combination wedge con­tains three heating zones:

DESCRIPTION OF FUNCTIONS LEISTER Twinny T

Material plasticising
with hot air

Contact heating Pre-heating, drying

cleaning of the material

3

Combiwedge

Drive/pressure roller

Welding direction

Hot air outlet

Pinch roller

Upper geomembrane liner

Lower geomembrane liner

Guide roller

Heating system cross sectional diagram

M

Description of tool LEISTER Twinny T

1

2

4

Frontal view

Back view

1

31

2 5

4

10

16

6

9

7

3

8

28

12

13

24

29

27

23

22

21

20

19

18

11

17

30

25

26

15

14