How do you make a clapboard for carton? LLY PACK partition slotter machine can slots accurate and clear. 4-5time faster than other similar machine. The maximum working speed can reach 120 times per minute. Partition slotter and partition assemble machine are special equipments for carton clapboard, it is mainly used to 3 5 7 ply corrugated cardboard We also offer partition assemble machine. Welcome inquiry.