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INSTRUCTIONS FOR JOINTING HIGRIP LEATHER/FABRIC SERIES |
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Preparation |
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1 .Using the tables, mark out
length of joint C and of leather and Nylon portions of joints A and B on
both sides of both ends of joint. |
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2. Using a sharp knife, cut
through leather surface at point X and remove leather between X and front of
joint. Great care must be taken not to cut through nylon core. |
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3. Grind the joint
to a wedge shape with correct dimensions of A, B & C. Grinding machine
should be fitted with abrasive paper grade 40 and run at approximately 270
Mtr./min. A block of hard wood 10 cm. x 5cm x 2cm approximately is used to
stroke and apply light pressure in case of open type grinders. |
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CEMENTING (HOT RRESS
METHOD) |
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1. Pre-heat press to 80°c.
2. Roughen leather parts of joint with glass paper.
3. Apply two liberal coats of solution No.4 to leather portions of joint,
allowing it to dry after each coat. (Belts supplied in spliced for m for
making endless on site will always have coating of solution No.4 applied
therein)
4. When second coat of solution No.4 is completely dry, apply a thin coat
of solution No.5 to whole (leather & nylon surfaces of both splices) area of
joint and allow it to dry until slightly tacky.
5. Place joint correctly in thermostatically controlled pre-heated press and
leave under pressure and heat for minimum of thirty minutes. leave the joint
in the press with the heat turned off for a further period of at least
thirty minutes.
6. Remove from press and allow it to cool thoroughly without any stressing
in any way. The edges of the belt and 'lips' of the joint are cleaned and
finished with rough emery cloth.
leather Nylon Fabric types are cemented in exactly the same way but in
addition the 'lip'. of the splice on the fabric top is sealed by cementing a
25mm wide woven fabric using a light film of HIGRIP solution
No.5. |
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CEMENTING (COLD PRESS
METHOD) |
1. Roughen leather parts and apply solution
No.4 as in hot press method 2 and 3 above.
2. Apply a thin coat of solution No.1 to nylon parts of joint only.
3. Allow to dry for approximately one minute but before it is dry apply a
coat of solution No.2 to nylon part. and allow the second coat to dry for
three minutes until slightly tacky.
4. Apply a coat of solution No.3 to leather parts of jointing taking care
that this does not mix with solution No.2.
5. Place joint correctly in press and leave under pressure for atleast eight
hours and. if possible, for twelve hours. Leather Nylon Fabric types are
cemented exactly the same way but in addition the 'lip' of the splice on the
fabric top is sealed by cementing over a 25mm wide strip of woven fabric
using a light film of solution No.3. |
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INSTRUCTIONS FOR
JOINTING HIGRIP RUBBER SERIES |
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Preparation |
1. Grind to given
angle and length of joint as shown in the earlier diagrams.
2. Clean rubber and nylon parts of joint with MEK (Methyle ethyle ketone) to
remove all loose particles of rubber. Allow MEK to evapo rate. Alternately
this can be done using a sharp knife.
3. Make sure no rubber is left on nylon part of joint.
4. Apply a thin coat of solution No.6 to skived rubber area of both ends and
allow to dry until slightly sticky.
5. Position both ends correctly in pre-heated press.
6. leave joint in press for a minimum of thirty minutes under heat and
pressure.
7. Switch off power and allow the joints to cool under pressure for at least
thirty minutes. Tension must not be applied before joint is completely cold.
8. Solution No.5 & 6 should not intermingle and at the same time hold the
skived ends to gether since solution No.6 sticks immediately on contact. |
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LIST OF JOINTING EQUIPMENTS FOR HIGRIP BELTING |
1. Finishing (Grinding) Machine.
2. Hot Press
3. Cold Press
4. Scraper.
5. Marking Plate.
6. Knife.
7. Carding Wire Brush.
8. Solutions.
9. Brushes. |
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DETERMINATION OF LENGHT |
1 .Measure belt length around the pulleys,
using a steel tape. If a tensioning pulley is present this should be at the
minimum distance position.
2. If the drive has no means of belt length adjustment or only very limited
adjustment, a tension allowance must be deducted from the length. Normal
tension allowances are 1.5 to 3%, but in extreme cases, 3.5% is required.
3. Add joint length C to length obtained in 2,
Please refer to the following Table for joint length. |
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JOINT LENGTH IN mm |
|
Type of belt |
Lenght of Leather |
Length of Nylon |
Total Length |
|
KHA3 |
15mm |
40mm |
70mm + TA |
|
KHA6 |
15mm |
45mm |
75mm + TA |
|
KHA10 |
20mm |
50mm |
90mm + TA |
|
KH2A6 |
20mm |
60mm |
100mm + TA |
|
KH2A10 |
20mm |
70mm |
110mm + TA |
|
KH3A10 |
20mm |
90mm |
130mm + TA |
|
KH4A10 |
20mm |
100mm |
40mm + TA |
|
KHCA3 |
15mm |
55mm |
70mm + TA |
|
KHCA6 |
15mm |
60mm |
75mm + TA |
|
KHCA10 |
20mm |
70mm |
95mm + TA |
|
KHC2A6 |
20mm |
80mm |
100mm + TA |
|
KHC2A10 |
20mm |
90mm |
110mm + TA |
|
KHC3A10 |
20mm |
10mm |
130mm + TA |
|
KHC4A10 |
20mm |
120mm |
140mm + TA |
