A continuous production device and method for glass fiber reinforced polyethylene composite pipe

Abstract

The invention belongs to the technical field of plastic pipes, and specifically relates to a continuous production device and method for a glass fiber reinforced polyethylene composite pipe. The main structure of the production device includes a first extruder, an inner pipe mold, a vacuum calibrating box, a first Cooling spray box, first tractor, first winding machine, first heater, second winding machine, second heater, automatic belt changing manipulator, outer tube extruder, outer tube extrusion mold, outer tube cooling The shaping mold, the second cooling spray box, the second tractor, the meter meter, the fixed-length cutting machine and the finished tube placement rack, the production method includes extrusion molding of the inner tube, continuous winding of the composite belt, extrusion of the outer tube There are four steps of coating, cutting and warehousing to realize continuous on-line production of glass fiber reinforced polyethylene composite pipes; the production equipment is environmentally friendly, and the production method is scientific and reasonable. The prepared glass fiber reinforced polyethylene composite pipes High compressive strength, thin pipe wall, low production cost, energy saving and environmental protection.

Description

Technical field: [0001] The invention belongs to the technical field of plastic pipes, and specifically relates to a continuous production device and method for a polyethylene composite pipe with glass fiber reinforcement, which can realize inner tube extrusion, continuous winding of glass fiber reinforcement tape, and polyethylene composite pipe with glass fiber reinforcement. On-line replacement of glass fiber reinforced tape and continuous on-line production of outer coating. Background technique: [0002] Reinforced thermoplastic pipe (RTP) aims to improve the internal pressure resistance. RTP usually includes a three-layer structure, the outer layer is a protective layer, and the material is a variety of thermoplastics. Generally, it is HDPE layer with anti-aging and UV resistance. The middle The layer is a reinforced material layer intertwined at a specific angle, and the materials include aramid fiber, polyester fiber, glass fiber and steel wire; the common specificat...

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Problems solved by technology

Patent documents related to RTP production equipment and methods include: Chinese patent 201510504346.X discloses a processing method and equipment for continuous fiber multi-layer winding thermoplastic composite pipes. The processing equipment includes continuous long fiber impregnated belts for installation and control of thermoplastic The control device for the axial and circular movement of the plastic inner tube and the melt supply device for conveying molten plastic. The front end of the melt supply device is equipped with a flat-slot die head. The processing method is that the inner tube rotates along the axis during the winding process. Moving, the pressure roller further promotes the full fusion between the wound continuous long fiber impregnated tape and the thermoplastic inner tube by pressing, and is cooled and shaped by the subsequent cooling fan to complete the single-layer winding and change the rotation direction of the inner tube. Carry out the next layer of winding until the number of winding layers reaches the requirement, and the melt supply device directly transports the melt between the continuous long fiber impregnated belt and the continuous long fiber impregnated belt, between the continuous long fiber impregnated belt and the thermoplastic inner tube, Plays the role of "binder"; Chinese patent 201410690683.8 discloses a long-fiber tape-shaped inner-wrapped glass fiber-wound three-layer composite polyethylene pipe, which is extruded from the outer functional material layer and the middle layer of long glass fiber ribbon-shaped polyethylene The winding layer and the inner functional material layer are composed of three layers. The three layers are coaxially wrapped from the inside to the outside. During the preparation, the inner tube is produced first, and the inner tube is cut to a fixed length. The inner tube rotates and moves along the axis at the same time. The long-fiber prepreg tape is wound on the inner tube, heated and melted; the length of the inner tube produced in the above patents is fixed, and the continuous on-line production of inner tube extrusion, composite tape winding and outer layer coating cannot be realized

However, Chinese patent 201310656110.9 discloses a production method and equipment for a thermoplastic winding reinforced plastic composite pipe. The production equipment includes an inner pipe extrusion module, a reinforcement layer winding module, an outer pipe extrusion module and a cutting module arranged in sequence from left to right. , where the inner tube extrusion module is used to extrude the plastic inner tube, the reinforcement layer winding module is used to wind the continuous fiber reinforced thermoplastic composite material to form a reinforcement layer on the inner tube, and the outer tube extrusion module is used to extrude the outer tube and Composite to the surface of the reinforcement layer; the length of the continuous fiber-reinforced thermoplastic composite material of the reinforcement layer directly restricts the length of the composite pipe. When the reinforcement material on the winding machine is used up, the production line must be shut down, and the continuous fiber-reinforced thermoplastic composite material cannot be replaced online. Without the continuous winding function of the reinforcement layer, continuous production cannot be realized

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