Splicer Defects | Condition 3

Splicer Defects - Condition 3 {Missed Splices}
Related to issues that can arise during paper splicing, specifically missed splices, outlines the potential causes and remedies for these problems. One common cause of missed splices is the failure to remove damaged layers of edge tears, which can be remedied by trimming off any damaged layers and cutting out any edge tears or nicks using a moon-shaped cut as trained. Another cause is the failure to remove a tight edge, which can be addressed by shifting the paper edge in the head to align the web to the paper roll, pulling the web tight, and pressing the clamp button to activate the paper stop bar. This will help to securely anchor the web and align it to the preparation bar. Improper paper slack on the new roll can also cause missed splices, which can be resolved by following the manufacturer's recommendations for how much slack, if any, can be left in the new roll before the splicer is activated. Setting the brake properly during paper preparation is also essential to prevent this issue. If the nip roll is out of parallel and the tape is not sealed across the web, it may cause missed splices. To address this, the knife and anvil clearance should be positioned as specified by the manufacturer, and the condition of the knife blade, anvil pad, and mechanical components should be checked. Additionally, sufficient air pressure on the gear tips should be ensured. Splicing at too high of a run speed can also cause missed splices, so it's essential to operate within the recommended range for each type of splicer, which can vary depending on the design, type, and condition of the material being spliced, and the condition of the roll stand. Other potential causes of missed splices include the new roll not being lifted off of the floor prior to splicing, operating the machine out of sequence, and roll damage that catches on parts of the splicer mechanism, which can be more of a problem on medium due to its brittle nature. In such cases, leading-edge roll damage should be stripped, and management should identify and correct the cause of the damage. Trailing edge roll damage should not be stripped, as strip waste can be costly.