Patent ID: 7254972

Claim:
A moving mold mechanism of a pipe bending machine, comprising a bed, two fixed molds positioned one above other on the bed, each of the fixed molds having a plurality of bending wheels thereon; and a moving mold mechanism connected to an arm member, which is moved to swing by means of a power source, the moving mold mechanism including two mold seat members positioned one above other, each of the mold seat members having a plurality of pressing wheels thereon; the mold seat members being moved by means of a rotating power source whose motion is transmitted to the mold seat members by means of a roller joined to an force output portion of the rotating power source; the roller having spiral grooves thereon; each of the spiral grooves being divided into a front section, and a rear section having a smaller slope than the front section; each of the mold seat members having a sliding element secured thereto, and a guide post slidable on the sliding element and passing into a respective one of the spiral grooves of the roller; a first linear rail mechanism interposed between each one of the sliding elements of the mold seat members and a corresponding guide post; and guiding mechanisms interposed between the mold seat members and the fixed molds for allowing the mold seat members to move up and down along a sloping path; whereby when the rotating power source is actuated to cause rotation of the roller, the roller will cause motion of the mold seat members through the guide posts secured on the mold seat members and received in the spiral grooves of the roller, and both the mold seat members will move forwards and backwards in crossing directions respectively as well as upwards and downwards in a sloping path respectively, to carry out a pipe bending process and to end a pipe bending process, owing to the linear rail mechanisms and the guiding mechanisms.