MANUFACTURE OF ASSEMBLED BOX OF HARD PLASTIC THIN SHEET MATERIAL AND AUTOMATIC MANUFACTURING MACHINE THEREFOR

PROBLEM TO BE SOLVED: To make an adhesive adequately tacky by applying a volatile liquid for activating an adhesive face which enhances an adhesive force to the face on the fastening side of a piece for fastening a cylindrical part and the face the fastening side of an edge part on the other side prior to the application of the adhesive, and covering/persuading and wiping off the volatile liquid. SOLUTION: First constituent pieces 9 of an assembled box comprising front, rear, left, right, upper and lower face walls 1-6, an ear piece 7 and an insertion piece 8 are formed by cutting a hard plastic thin sheet. In addition, a piece 10 for fastening a cylindrical part is provided on the edge on one side of the cylindrical part which forms the front, rear, left, and right walls on the constituent pieces 9, and at the same time, a volatile liquid for activating an adhesive face for enhancing an adhesive force is applied on the face on the fastening side of the piece 10 for fastening the cylindrical part and the face on the fastening side of the edge part 11 on the other side of the cylindrical part. Further, immediately after the application of the volatile liquid, the liquids 12, 13 for activating the adhesive face are covered and spread almost over the entire area of the face on the fastening side on the piece 10 for fastening the cylindrical part and the face on the fastening side of the edge part 11, and are wiped off to activate the entire area of the faces. Finally, these activated faces are fastened to each other using an adhesive.