| 摘要 |
A pipe bending molding apparatus for a plastic greenhouse is provided to rapidly rebuild the plastic greenhouse by stretching a curved pipe with a straighten roller and bending to a semi-circle shape with a bending unit. A pipe bending molding apparatus for a plastic greenhouse comprises a square frame shaped body(31); plural variable straightening rollers(34) position-controllably installed at the back of the body, multi-staged by having an upper groove with a small radius and a lower groove with a large radius which; plural fixed straightening rollers(35) installed between straightening rollers, provided with same grooves(35a,35b) which are formed double with the groove formed at the variable straightening roller; a molding roller(57) rotatably installed at a slider moving along an elongated hole formed vertically to the fixed straightening roller placed at the center of the body, formed with a groove having a same radius with the groove formed at the lower part of the fixed straightening roller; a control screw(58) mounted at one side of the slider; a cam plate(60) with a knob installed eccentrically to a shaft mounted at the front of the body to push the slider to the fixed straightening roller; a stopper(65b) mounted in the moving zone of the camp plate, snagged by a projection fixed to one side of the cam plate; an elastic member connecting the slider and a boss supporting a shaft of the cam plate and repositioning the slider; a guide plate(66) positioned between the fixed straightening roller and the slider to transmit a pipe; a motor lying on the lower surface of the body and generating power; and a power transmitting unit reversely rotating variable and fixed straightening rollers at the same time according to the drive of the motor.
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