Empalmes En caliEnte Correas Transportadoras

iente Hot Splicing
of Rubber Conveyor Belts
with Fabric Plies
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- Splicing Manual -

Contents
General recommendations
Storage of hot splicing products
Precautions
Application range of hot splicing products
Standard conveyor belts
Splicing methods
Place / site

Page
4
4
4
5
5
5
5

Products for hot splicing of standard coveyor belts withfabric plies

6

Cure Chart for hot splicing of standard coveyor belts with fabric plies

7

Tools and equiment

8

Conditions for hot splicing

9

Work place
Conveyor belt
Ambient conditions

9
9
9

Structure and dimensions of hot splices
Splicing methods
Selection of step direction
-The splice runs against the conveying direction
-The splice runs in the conveyingdirection
Length of steps and overlapping area
-Mono-ply belts - up to 500/1
-Two ply and multi-ply conveyor belts
Step splice layout drawings

10
10
10
10
11
11
12
13

Splicing process
General preparation
Preparation of the lower part of the belt
Preparation of the upper part of the belt
Joining of the splice
Vulcanizing the splice
Final measures
Job Report Forms

14
18
2122
26
28
29

3

General recommendations
Storage of hot splicing products
The hot splicing products have to be stored in a dry and dark place, at a temperature between
59 and 77°F (DIN 7716).
Please observe the expiration date on the box!
When unvulcanized splice materials are stored under unfavorable conditions their physical
and/or chemical characteristics change. Eventually thesechanges will render the unvulcanized
splice materials unsuitable for use. These effects result in changes in the curing behavior and/
or in the cured physical properties of the splice materials.
The harmful effects of these factors can be minimized by a careful choice of the following
storage conditions.
1. Storage at 700 F will give a shelf life of 12 Months (higher temperatures shorten shelflife).
Storage at 500 F will give a shelf life of more than 12 Months. If material is stored at
extremely low temperatures (freezing is not recommended) the material should be allowed
to stand at 700 F for at least 48 hours before use to avoid condensation.
2. The relative humidity should preferably be below 60% for long term storage. Damp
conditions should be avoided since long term exposureto moisture can influence the
curing and crosslinking behavior of the materials.
3. Sunlight and artificial light which has a substantial content of ultraviolet light can adversely
affect the stability of unvulcanized rubber. Depending on the grade and the time span of
exposure, chain rupture and/or crosslinking may occur. In view of this, exposure to light
should be restricted to a minimum.4. Where possible, unvulcanized rubber should be protected from excessive air circulation
and should not be stored near electrical equipment (motors) that could be a source of
ozone. For this reason it is advisable to keep the splice material boxes closed and sealed.
5. Unvulcanized rubber should be stored in an area which meets the usual standards of
cleanliness, even though the rolls areindividually wrapped in polyethylene sheeting. All
direct contact with foreign materials, especially greases and oily contaminates of any type
should be avoided. It is recommended that the material be kept in its original packaging
until the moment it is used.
6. All though the REMA splice materials have a long shelf life they should not be stored for any
longer than is necessary. It istherefore recommended that the FIFO ( first in - first out )
stock rotation system be used.
4

Application range of hot splicing products
Standard conveyor belts
Hot splicing of mono- and multi-ply conveyor belts with textile carcass (DIN 22102)
and covers made of the following polymers
– Natural rubber

NR*

– Styrene butadiene rubber

SBR*

– Isoprene rubber

IR*

– Butadiene...