Biaxial orientation plastic tube manufacturing method and apparatus

Abstract

The invention relates to a biaxial orientation plastic tube manufacturing method and an apparatus. The manufacturing method is characterized in that a plastic tube raw material is prepared to a plastic tube through a plastic tubing extruder, the plastic tube is heated to a high elastic state, the pipe segment in the high elastic state is performed with axial direction stretching and orientation by a tractor, and then the pipe segment in the high elastic state is performed with radial expansion. An orientation method of the radial expansion is characterized in that a taper expanding head is built in the pipe segment in the high elastic state, the pipe segment in the high elastic state of the taper expanding head can be used for realizing the circumferential orientation, the expanded pipe segment is cooled and sized to obtain the biaxial orientation tube. The manufacturing method and the apparatus can realize the stretching orientation at axial direction and circumferential direction on the plastic tubing, the mechanical properties of the plastic tube are increased, the method is simple, the manufacturing method and the apparatus can be directly used on a plastic tube production line, and are easy to be industrialized.

Description

Technical field [0001] The invention belongs to the field of polymer molding processing, in particular to a method and device for manufacturing a biaxially oriented plastic tube. Background technique [0002] The macromolecular segments of polymer materials can be oriented along the direction of the force under a certain temperature and external force, and the macromolecular segments are further arranged in an orderly manner, which greatly improves the mechanical properties of the material in the orientation direction. Under the same pipe diameter and pressure bearing capacity, the pipe wall made of materials with enhanced orientation is thinner, which can effectively save raw materials. At present, there have been literature reports on the production method and equipment of biaxially oriented plastic pipes. For example, patent 200810102889.9 discloses a process method and device for manufacturing biaxially oriented plastic pipes. The device consists of a fluid injection rod, a s...

AI Technical Summary

Problems solved by technology

However, this method has serious disadvantages. The spring return control device needs to have a fixed structure to work, which will inevitably lead to the inability of the circumferentially closed tube blank to pass through, and the theoretical continuous production of biaxially oriented tubes can only be limited to pre-set The longer single tube blank in the device is continuously expanded, and there are many devices that need to be operated synchronously on the equipment, which is difficult to operate and is not conducive to the large-scale industrial production of biaxially oriented tubes.

Images