Patent ID: 8257076

Claim:
A multi-rod structure for opening and closing molds, comprising: a cam rotating to generate a driving power; a cam follower actuated by the cam to linearly move back and forth; a first side connection rod assembly actuated by the cam follower to swing and having a first side triple joint connection rod; a first mold actuated by the first side triple joint connection rod of the first side connection rod assembly to linearly move back and forth; a linkage connection rod actuated by the first side triple joint connection rod of the first side connection rod assembly to swing; a second side connection rod assembly actuated by the linkage connection rod to swing and having a second side triple joint connection rod; and a second mold actuated by the second side triple joint connection rod of the second side connection rod assembly to linearly move back and forth; wherein the second mold cooperates with the corresponding first mold which linearly moves back and forth opposite to the second mold, so that the second mold is close to or away from the first mold for carrying out a mold closing operation or a mold opening operation.