Forming device of hole net steel skeleton reinforced composite pipe

Abstract

The invention discloses a forming device of a hole net steel skeleton reinforced composite pipe. The forming device comprises a machine base, a forming inner mold and a forming outer mold, wherein theforming inner mold and the forming outer mold are arranged on the machine base; the forming outer mold is arranged on the periphery of the forming inner mold in a concentrically sleeving manner, a forming channel allowing a hole net steel skeleton to penetrate through and plastic fluid to penetrate through is formed between the forming inner mold and the forming outer mold, the forming inner moldis provided with a shaping segment, and correspondingly, a positioning and shaping mechanism used for positioning and shaping the hole net steel skeleton is arranged at the position, corresponding tothe shaping segment, of the machine base. According to the forming device, in the forming process, the hole net steel skeleton is shaped, and the forming quality of the composite pipe is improved.

Description

technical field [0001] The invention relates to a molding device, which belongs to the technical field of composite pipe molding and is used in the production of perforated steel skeleton reinforced composite pipes. Background technique [0002] The perforated steel skeleton reinforced composite pipe is a new type of composite pipe. On the basis of the ordinary plastic pipe, the perforated steel skeleton is added. The perforated steel skeleton is formed into a tubular structure by curling and welding the perforated steel strip, and then reinforced The skeleton then enters the molding device for molding. The molding device mainly includes a molding inner mold and a molding outer mold. The molding outer mold is connected to the extruder, and the perforated steel skeleton enters the molding channel between the molding inner mold and the molding outer mold. , the plastic extruded by the extruder flows into the forming channel between the outer mold and the inner mold to wrap the...

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Problems solved by technology

[0003] 1. During the forming process, although the perforated steel skeleton is curled and welded into a tubular structure through the upstream process, it will be deformed during the welding and curling process. The steel skeleton is not completely cylindrical, so it enters the forming device and forms a composite Uneven strength of the tube;

[0004] 2. The forming inner mold of the extruder needs to be cooled, and the current cooling effect is not good, so the forming inner wall of the composite pipe is not smooth;

[0005] 3. Although the inner hole of the composite pipe is in contact with the inner mold, in the actual production process, the contact between the inner hole and the inner mold is not very consistent, so the inner diameter of the composite pipe may fluctuate, which is prone to errors

[0006] 4. The position of the material ring of the current forming outer mold is difficult to adjust, and there is an annular channel between the material ring and the outer forming mandrel. Once the position of the material ring is not installed accurately, the width of the annular channel will be uneven, which will lead to steel The thickness of the inner and outer plastic layers of the skeleton is uneven, which affects the strength of the composite pipe;

[0007] 5. It is difficult to adjust the die position of the current forming outer mold, which will also affect the overall size of the composite pipe; at the same time, the replacement of the die and material ring is more complicated. When it is necessary to make composite pipes of different sizes, it is necessary to Disassemble the entire forming outer mold, and then replace the die and material ring, the operation is more complicated

[0008] 6. The current forming outer mold needs to go through a certain distance after being sized by the die before entering the cooling box for cooling. When the composite pipe with a higher temperature passes through this gap distance, the plastic fluid of the composite pipe is relatively soft. There may be a collapse phenomenon or the fluid in the upper part of the composite pipe flows down due to gravity, resulting in a thicker plastic thickness in the lower part of the composite pipe, so the quality of the composite pipe cannot be controlled

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