Cylinder temperature controlling device for controlling the temperature of upper and lower cylinder blocks independently

A cylinder temperature controlling device comprising:

• a plurality of block cylinders arranged in a linear manner;
• at least one of said plurality of block cylinders is split into an upper block and a respective lower block, said block cylinders arranged along an axis to form a cylinder;
• heater units, for heating said upper block and said lower block, disposed on said upper block and said lower block, respectively;
• cooling units, for cooling said upper block and said lower block, disposed on said upper block and said lower block, respectively;
• and
• temperature detecting units for detecting a temperature of said upper block and a temperature of said lower block, disposed on said upper block and said lower block, respectively, said temperature detecting units comprising control means coupled to the heater units and the cooling units for independently controlling the temperature of said upper block and said lower block wherein said control means controls the temperature of said upper block and said lower block to be the same in a normal operation wherein the cylinder is assembled, and said control means controls the temperature of said upper block to be lower than a temperature of said lower block in a disassembling operation of said cylinder.