The utility model belongs to the field of cake decoration, particularly relates to an extruder on a cake decoration 3D printer, and aims to solve the problems that in the existing cake decoration process, the interior of a placing
pipe is inconvenient to clean after cream in the placing
pipe is used up, the cream is not convenient to replace, the process is relatively inconvenient, the complexity is increased, and the production cost is reduced. According to the technical scheme, the device comprises a base, the top of the base is provided with an installation frame and a containing cylinder, and the containing cylinder is fixedly installed at the bottom of the installation frame through a plurality of bolts. When the device is used, cream can be squeezed out from the bottom of the placing
barrel so as to meet the requirements of different mounting patterns, the interior of the placing
barrel can be conveniently cleaned or the cream can be conveniently replaced, the placing
barrel can be easily disassembled when necessary, the process is convenient and fast, the operation efficiency and applicability are improved, and the device is suitable for popularization and application. And meanwhile, the mounting frame and the placement barrel can conveniently move according to a preset track, so that the decoration 3D printing effect is conveniently achieved.