Manufacturing apparatus for tubular product such as intermediate transfer belt before cutting

A method of controlling a manufacturing apparatus of a tubular product, wherein the manufacturing apparatus comprises:

• an injection molding unit which feeds an injection molded tubular shaped body continuously in a predetermined delivery direction,
• a defect detection unit for detecting a defect on a surface of the molded body passing through a predetermined detection position in the delivery direction, and
• a cutting part for cutting the tubular product from the molded body, and the method includes
• a tubular product cutting step for separating the tubular product including a portion of a predetermined length from the molded body by using the cutting part, when the portion of a predetermined length in the molded body passes through the detection position without detecting a defect by the defect detection unit, and
• a defect portion cutting step for separating the tubular product including the defect detected by the defect detection unit from the molded body by using the cutting part, when a defect is detected by the defect detection unit before the portion of the predetermined length in the molded body passes through the detection position, wherein
• a length of the tubular product cut off by the defect portion cutting unit is shorter than a good product length which is a length of the tubular product to be cut by the tubular product cutting unit.

A non-transitory computer-readable recording medium storing a controlling program for a manufacturing apparatus of a tubular product, wherein the manufacturing apparatus comprises:

• an injection molding unit which feeds an injection molded tubular shaped body continuously in a predetermined delivery direction,
• a defect detection unit for detecting a defect on a surface of the molded body passing through a predetermined detection position in the delivery direction, and
• a cutting part for cutting the tubular product from the molded body, and the program causing a computer to execute
• a tubular product cutting step for separating the tubular product including a portion of a predetermined length from the molded body by using the cutting part, when the portion of a predetermined length in the molded body passes through the detection position without detecting a defect by the defect detection unit, and
• a defect portion cutting step for separating the tubular product including the defect detected by the defect detection unit from the molded body by using the cutting part, when a defect is detected by the defect detection unit before the portion of the predetermined length in the molded body passes through the detection position, wherein
• a length of the tubular product cut off by the defect portion cutting unit is shorter than a good product length which is a length of the tubular product to be cut by the tubular product cutting unit.