Method for manufacturing rubber crawler

A method for producing a rubber crawler comprising:

• forming rubber protrusions having a half-vulcanized surface by vulcanizing a first unvulcanized rubber while suppressing thermal conduction to the first unvulcanized rubber to keep a part of its surface in a half-vulcanized state;
• forming a main body having a half-vulcanized surface by vulcanizing a second unvulcanized rubber with tension members embedded therein while suppressing thermal conduction to the second unvulcanized rubber to keep only first portions including planned arranging positions at which the rubber protrusions are to be arranged in a half-vulcanized state, the first portions being distanced from the tension members in a thickness direction of the main body;
• and
• forming a rubber crawler by, after the forming of the rubber protrusions and the forming of the main body, arranging the rubber protrusions on the main body so that the half-vulcanized surface of the rubber protrusions matches the half-vulcanized surface of the main body, and then integrating the rubber protrusions and the main body via vulcanization, wherein
• the rubber protrusions are formed in a first mold comprising a first thermal insulation material arranged at least at a surface of the first mold defining the half-vulcanized surface, and wherein
• the first mold has an upper mold piece and a lower mold piece,
• the upper mold has a first mating surface and the lower mold has a second mating surface matching with the first mating surface, and
• the first thermal insulation material is embedded in the upper mold piece so as to be flush with the first mating surface.