Semi-automatic lock-bottom pre-fold folder gluer belongs to the four-folding lock bottom equipment. With attractive appearance, it allows paper boxes to be easily filled and opened. An individual frequency converter is arranged at the front and rear of the folder gluer for more easy delivery of paper. Therefore, it is really a more cost-effective and practical model, being specially used for corrugated boxes, such as wine bottle boxes. It features trumpet-free mouths, strong adhesive properties, and crevasse- and crack-free characteristics, etc. It can process at least 3,000 corrugated boxes hourly. It can also be used for gluing various hotel supplies boxes, medicine boxes, cosmetic boxes, and other lock-bottom and non-lock-bottom paper boxes.