Conversion structure for a molding system (100, 200), comprising: a mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) and a standard mold receiver, the standard mold receiver (140, 157) being configured to receive the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) for converting a mold configuration of a mold and the mold conversion structure (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) being configured to be received in the standard mold receiver for converting the molding configuration of the mold, the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) including a complementary guide configured to cooperate with a guide on the standard mold receiver for accommodating, in use, a repositioning of the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) between a molding position and an ejection position, and the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) being configured to cooperate with a shutter device associated with the standard mold receiver, which shutter device is operable, in use, to selectively permit the repositioning of the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) between the molding position and the ejection position, characterized in that the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) includes a link member configured to cooperate with a shutter member of the shutter device, wherein the shutter member is repositionable, in use, to selectively permit the repositioning of the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F). a mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) and a standard mold receiver, the standard mold receiver (140, 157) being configured to receive the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) for converting a mold configuration of a mold and the mold conversion structure (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) being configured to be received in the standard mold receiver for converting the molding configuration of the mold, the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) including a complementary guide configured to cooperate with a guide on the standard mold receiver for accommodating, in use, a repositioning of the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) between a molding position and an ejection position, and the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) being configured to cooperate with a shutter device associated with the standard mold receiver, which shutter device is operable, in use, to selectively permit the repositioning of the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) between the molding position and the ejection position, characterized in that the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F) includes a link member configured to cooperate with a shutter member of the shutter device, wherein the shutter member is repositionable, in use, to selectively permit the repositioning of the mold conversion module (151A, 151B, 151C, 251A, 251B, 251C, 251D, 251E, 251F).