Nov 08, 2023
Cold Vulcanizing Cement OM-2000, combined with AR Hardener, offers a reliable and efficient solution for conveyor belt repairs. This versatile adhesive system is designed to bond rubber components seamlessly, ensuring strong and durable joints. In this guide, we'll explore the step-by-step process of using Cold Vulcanizing Cement OM-2000 and AR Hardener for effective conveyor belt repairs.
Always store ORI products in cool, dry & dark places. For better results keep OM-2000 CEMENTcontainer away from direct sunlight or heat.
Do not use a grinding disc for buffing the belt. When bufng rubber and fabric of the belt surface avoid shining, scorching, or smearing.
Buff canvas and rubber with a rotating wire brush. Remove dirt and rust from the metal surface. Remove buffering dust with a dry brush.
- Mixing Method:
Mix OM-2000 CEMENT with AR HARDNER very well. For getting Super High Strength Power this mixer of OM-2000 CEMENT and AR HARDNER should be used within two hours.
- Coating Method:
Always apply two coats on metal, rubber, and canvas surfaces. Allow the First coat applied to the rubber and canvas to dry completely. On a metal surface, it may take 1 to 2 hours to dry. The second coat, however, should be dried until slightly tacky to the back of the Finger. Apply 3rd coat only in case of over-drying.
- Stitching Method:
Initially you may use a 15 mm wide roller and start from the center and slowly move outwards of the belt. Please repeat the process with a narrow 3 mm stitcher. With this Stitcher you apply your best possible force on the belt move from center to outward and check no air bubbles should be there for getting the best bonding. You may also use the ORI special double-action roller to facilitate stitching.
Step | Product(s) Used | Product(s) Used |
|---|---|---|
Storage | ORI Products, OM-2000 CEMENT | Store in cool, dry & dark places. Keep OM-2000 CEMENT away from direct sunlight or heat. |
Buffing Preparation | N/A | Avoid using a grinding disc. When buffing rubber and fabric, prevent shining, scorching, or smearing. |
Buffing Method | N/A | Use a rotating wire brush for canvas and rubber. Clean metal surfaces of dirt and rust. Remove buffing dust with a dry brush. |
Mixing Method | OM-2000 CEMENT, AR HARDNER | Mix OM-2000 CEMENT with AR HARDNER thoroughly. Use the mixture within two hours for Super High Strength Power. |
Coating Method | OM-2000 CEMENT, AR HARDNER | Apply two coats on metal, rubber, and canvas. Allow the first coat to dry completely; the second should be tacky. Apply a third coat if over-dried. |
Stitching Method | ORI Special Double-Action Roller | Use a 15 mm wide roller and a 3 mm stitcher, applying force from the center outward, ensuring no air bubbles. |
Cutting Lower Belt | ORI Adjustable Knife, ORI Pincer, ORI 'V' Pointed Knife | Align belt ends, mark, and cut using ORI tools for precision. Remove fabric and bevel edges as necessary. |
Cutting Upper Belt | ORI Tools (as needed) | Ensure alignment of belt edges and fabric steps. Mark and cut using ORI tools, matching the lower belt. |
Joining Splice Surface | ORI Electric Motor, ORI Rotating Wire Brush, ORI Dry Hard Brush | Buff the splice surface with ORI tools. Apply two coats of the CEMENT and HARDNER mixture, then stitch the area. |
Filling and Covering Joints | OM-2000 CEMENT, AR HARDENER, Floating Gum | Apply the mixture to joint gaps and let it dry until tacky. Apply floating gum strip and stitch with ORI rollers and stitcher. |
Final Steps | N/A | Wait at least six hours before placing the belt under tension. |
To Begin with: Always be careful and check about the heat, clean site, good weather, dust & moisture free atmosphere before starting. If you are satisfied with the above conditions you may now start the preparation of cold endless splicing of multiple conveyor belts as under.Standard Values for cold endless splicing of multi-ply rubber conveyor belts.
Belt | Tensile Strength (N/mm) | Fabric ply Tensile Strength (N/mm) | Minimum Step Length (mm) | No. of Steps | Splice Length (mm) |
|---|---|---|---|---|---|
200/3 | 63 | 150 | 300 | 2 | 300 |
250/4 | 80 | 200 | 450 | 3 | 450 |
250/3 | 63 | 200 | 400 | 2 | 400 |
315/4 | 80 | 200 | 600 | 3 | 600 |
315/3 | 63 | 200 | 400 | 2 | 400 |
400/4 | 100 | 250 | 600 | 3 | 600 |
400/3 | 80 | 250 | 500 | 2 | 500 |
500/4 | 100 | 250 | 750 | 3 | 750 |
630/5 | 125 | 300 | 1000 | 4 | 1000 |
500/3 | 80 | 250 | 500 | 2 | 500 |
630/4 | 100 | 250 | 750 | 3 | 750 |
800/5 | 125 | 250 | 1000 | 4 | 1000 |
630/3 | 63 | 250 | 600 | 3 | 600 |
800/4 | 100 | 300 | 900 | 4 | 900 |
1000/5 | 125 | 300 | 1200 | 2 | 1200 |
1000/4 | 80 | 250 | 900 | 3 | 900 |
1250/5 | 125 | 300 | 1200 | 4 | 1200 |
1. Measure the belt length according to your requirements.
2. Please add the following.
(a) 1x the dimension of the overlap of the splice as per chart plus.0
(b) Belt width x 0.30 from the bias cut of approx 16 angles for example:1000 mm wide belt, tensile strength 630/4750 mm for the overlap of the splice (See Chart)
+300 mm for the bias cut/= 1050 mm required length of belt
Please set both ends of the belt-upper and lower as per the running direction (See Figures 1 & 2) and mark the upper portion and lower portion.
At the end of the belt mark a line with ORI yellow Chalk at 0 BC at a right angle (90 ). Now measure the belt width X 00.30 = approx 16 on the edge of the belt and mark AB. Draw a line with the help of ORI string for bias cut and cut the Belt.
Mark a line with ORI yellow chalk parallel to the bias cut 50 mm from the belt end and mark the belt edges which should be kept as it is. Now cut the belt cover along the line marked using our ORI Adjustable knife for correct and sharp cutting.
Now pull off the 50 mm wide strip with the help of an ORI pincer and cut the edges flush. Then bevel another 50 mm of the belt cover with the help of a 7” ORI ‘V’ pointed knife parallel to the bias cut for the cover strip
(i) Now measure the length of the splice and mark the length (as per the chart) parallel to the bias cut. Put a second line to bias cut 50 mm from the first line. Mark the edges of the belt towards the belt end.
(ii) Cut only the belt cover along the 50 mm mark using an ORI adjustable knife. Please check that you do not damage the fabric or edges of the belt.
(iii) Pull off all strips using our ORI pincer.
(iv) Then bevel another 50 mm of the belt cover parallel to the above-removed strip by using an ORI 7” pointed knife.
(v) Now cut the belt cover along the already marked edges by using an ORI adjustable knife. Cut the belt cover into small strips from the exposed fabric towards the belt end and pull it off by using an ORI pincer and screwdriver
(vi) Mark a line on the fabric parallel to the bias cut 50 mm from the bevel. Carefully cut the first fabric ply along this line using an ORI ply cutter or with the ORI adjustable knife.
(vii) Loosen fabric ply towards the belt with an ORI 12” long screwdriver
(viii) The above strip loosened fabric ply using an ORI pincer or any gripping tongs
Continue this process of fabric plies as per the chart (given in the beginning) cut in slightly and pull off with the help of ORI pincer
Note: If you desire to cut the edges of the belt, Flush with each fabric step.
Please put the belt ends one upon another to ensure the correct alignment of the belt edges because this is very important that both parts should lie in a correct posture. For this purpose, you may also use champs. Transfer the edge of the top fabric ply of the lower part to the upper part for the bias cut. The Fabric steps of the lower part must be exactly the same as the upper part. Here you should mark by using a sharp pointed ball pen on both the edges of the belt
NOTE: Now open the clamps. Fold back the lower belt. Mark the bias cut. Please repeat the same instructions on the top side (Carrying side) as advised to you for the pully side (Bottom Side) of the lower belt.
Fold back the upper part and proceed on to the pully side for the carrying side of the lower part. It is very important to always observe the exact dimensions of the fabric steps.