Complex flow tube for fine sealing coating of PVC material for automobile and manufacturing method therefor

A complex flow tube for fine sealing coating of a PVC material for an automobile, the complex flow tube comprising

• a base fixed to a mechanical arm, and a pipeline connected to the base for delivering a PVC sealant, wherein the base and the pipeline are formed by metal 3D printing and the base is detachably butted with an interface of a PVC gluing pump mounted on the mechanical arm;
• the PVC gluing pump delivers the PVC sealant through the pipeline to a part to be coated or sealed of the automobile;
• wherein the pipeline is divided into a feeding section, a transition section and a discharge section sequentially according to a flow direction of the PVC sealant;
• the feeding section is a tapered passage, an inner diameter thereof gradually decreasing along the flow direction of the PVC sealant;
• the discharge section has a “7”-shaped structure as a whole, and is composed of a straight pipe section and a bent section;
• and
• an axis of the transition section intersects an axis of the straight pipe section at an included angle of 35° to 45°, and the axis of the straight pipe section and an axis of the bent section are perpendicular to each other.