The issue of lipstick "stuck and leaking" during filling usually points to a problem with temperature or mechanical timing. Essentially, if the filling nozzle doesn't retract cleanly, the sticky wax can get stuck; if the seal fails, the hot liquid leaks.
Check factory if use High precision two-piece filling pump,As this pupm is main part to have smooth filling in the machine .In case of leaking and get stuck.
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