Patent ID: 6971502

Claim:
A method of conveying extrusion molded products from a material feed unit to a receiving unit by a plurality of conveyors, comprising: removably interposing at least one expansion conveyor between some of the plurality of the conveyors causing expansion or contraction thereby adjusting a conveying speed of the extrusion molded products to be carried, wherein a conveyor speed of the plurality of conveyors can be changed to several levels, a delivery speed of the material feed unit is controllable to be increased or decreased depending on an increase or decrease of the conveyor speed of the plurality of conveyors, and obtaining in advance a response delay of the delivery speed of the material feed unit to the conveyor speed of the plurality of conveyors and an attenuation time, wherein a target value of the delivery speed is set based on the response delay and the attenuation time when the conveyor speed of the plurality of conveyors is changed.