KY-12H Hole Making Machine

Why Hole Placement Determines Magnet Closure Performance

In the manufacture of premium rigid boxes — including high-end cosmetic packaging, luxury gift boxes, and branded electronics packaging — the magnet closure mechanism is the most mechanically critical element of the finished product. The quality of that closure depends entirely on one upstream step: the precision and consistency of the hole drilled in the greyboard panel before the magnet is pasted.

When holes are drilled manually, even skilled operators introduce positional variation of ±2–5mm between panels across a production shift. This variation directly translates to magnets that do not align flush with their counterparts, closures that feel loose or require excessive force to open, and — worst of all — structural failures during quality inspection that trigger costly rework or scrap at the finishing stage.

“The hole-making step is where rigid box quality is won or lost. By the time a panel reaches the magnet pasting station, the placement tolerance is already fixed. You cannot recover a mis-drilled hole downstream.” — Production Engineering, Rigid Box Finishing Operations

Automatic Hole Making as the Solution to Pre-Magnet Variability

The Kylin KY-12H eliminates positional variability by replacing the hand-drill operation with a mechanically fixed cam-drive system. The hole-distance jig is set once per job to within ±0.3mm, then the machine repeats that exact position on every subsequent panel cycle — whether that is the 10th panel or the 10,000th. At 20–30 pcs/min sustained output, the KY-12H does not fatigue, does not drift between morning and afternoon shifts, and does not require additional operators to maintain throughput.

From a process integration standpoint, the machine’s compact 950×600mm floor footprint allows it to be sited directly in-line between the grooving station output conveyor and the magnet pasting machine feed table, with no floor modification or infrastructure change required beyond a standard 220V outlet.

Drill Bit Selection and Greyboard Compatibility

The KY-12H accepts interchangeable drill bits across the full ∮8–21mm range. For most neodymium disc magnets used in rigid box applications, the appropriate hole diameter falls in the ∮10–16mm range. The fixed-depth-stop mechanism ensures that the drill never penetrates deeper than the greyboard panel thickness, preventing surface-paper blowout on the wrap side — a defect that would render the finished box aesthetically unacceptable for luxury end markets.

The machine performs reliably across standard greyboard thicknesses from 1.0mm to 3.0mm — covering virtually the entire range used in rigid box construction for cosmetics, electronics, and premium consumer goods packaging.

ROI Analysis: Automating the Hole Making Process

At a conservative 22 pcs/min over a 16-hour dual-shift production day, a single KY-12H produces approximately 21,120 drilled panels per day. Compared to a manual drilling team achieving 7 pcs/min per operator (typically requiring 2 operators to match line demand), the automated solution delivers a labor saving of roughly 2 full-time operator positions per shift — generating payback periods measured in months rather than years at typical rigid box factory wage rates in both domestic and export markets.

Integration Into the Rigid Box Production Line

The KY-12H fits into the standard rigid box workflow at the critical pre-pasting position. A typical high-volume line sequence runs: greyboard slitting → V-grooving → KY-12H hole making → magnet pasting → corner staying → box assembly. Because the KY-12H operates at 20–30 pcs/min, it comfortably keeps pace with semi-automatic and fully-automatic magnet pasting stations, eliminating it as a bottleneck even in high-throughput configurations.