Continuous forming device and working method for biaxially oriented polyvinyl chloride pipe

A polyvinyl chloride, biaxial orientation technology, applied in the field of plastic pipe extrusion molding tools, can solve the problem of affecting the performance of PVC-O pipes, poor control of the internal stress of the pipe blank cooling temperature, and difficulties in pipe blank control and wall thickness adjustment and other problems, to achieve the effect of simple structure, high practicability and low maintenance cost

Active Publication Date: 2018-01-02
山东华信塑胶股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The application of two-step processing is earlier, the process and equipment are simple, but the production efficiency is low, and energy and labor costs are consumed
However, the one-step method that has been applied at present has greatly improved the relative production efficiency, and requires less manpower and energy consumption. Thin-wall over-drawing machine slips due to small supporting force, which makes it difficult to control the stretch ratio and adjust the wall thickness after biaxial stretching of the tube billet, which affects the final use performance of PVC-O pipes

Method used

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  • Continuous forming device and working method for biaxially oriented polyvinyl chloride pipe
  • Continuous forming device and working method for biaxially oriented polyvinyl chloride pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 1-2 shown.

[0039] A continuous molding device for biaxially oriented polyvinyl chloride pipes, comprising an outer mold 4, a mandrel 5, a tube blank 9 cooling system, and a bidirectional stretch forming system; the tube blank 9 cooling system includes a low-pressure air intake pipe 2, Guide column 7, isolation plate 6, adjustable temperature water immersion water tank 8 and sealing ring 12; the side wall of guide column 7 is provided with high-pressure air hole, low-pressure air hole and air bag air hole; low-pressure air inlet pipe 2 passes through mandrel 5 and communicates with low-pressure air hole ; The temperature-adjustable water-immersion water tank 8 is airtightly connected with the radial section of the outer mold 4 . The tube blank 9 is extruded from the outer mold 4 and the core mold 5 and enters the temperature-adjustable water-immersion water tank 8, and the water in the temperature-adjustable water-immersion water tank 8 contacts the tu...

Embodiment 2

[0044] The continuous forming device for biaxially oriented polyvinyl chloride pipes as described in Example 1 is different in that the left and right ends of the shaped cooling water tank 17 are respectively provided with a sizing sleeve 16 and a circular sealing gasket. The sizing sleeve 16 and the annular gasket are tightly sealed with the outer wall of the pipe to play a sealing role.

[0045] The sealed air bag 21 is stretched by the air bag pull rod 19 and transmits the air pressure. The length of the air bag pull rod 19 should enable the sealed air bag 21 to be placed behind the tractor 20, so that the lumen maintains the air pressure when the pipe passes through the tractor 20, so as to improve the supporting force of the pipe and improve the air pressure. Stability and reliability in the continuous production of pipes.

Embodiment 3

[0047] The continuous molding device for biaxially oriented polyvinyl chloride pipes as described in Embodiment 1, the difference is that the device also includes a pressure roller support frame 15; The rotation plane is the vertical direction; two pressure rollers 13 are arranged on the pressure roller support frame 15 connected by threaded screw rods. The pressure roller support frame 15 can be rotated and adjusted by 360°. According to the wall thickness deviation of the formed pipe, the tightness of the pressure roller 13 at the corresponding position and the position of the pressure roller can be adjusted through the threaded screw; the pressure roller 13 is made of hard plastic with a smooth and flat surface .

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Abstract

The invention relates to a continuous forming device of a biaxial orientation polyvinyl chloride pipe and an operating method. The continuous forming device of the biaxial orientation polyvinyl chloride pipe comprises an outer mold, a core mold, a pipe blank cooling system and a double orientation stretch forming system; the pipe blank cooling system comprises a low pressure air inlet pipe, a guide post, a separator, a temperature-adjustable water immersion type tank and a seal ring; the double orientation stretch forming system comprises a tapered orientation mold, a sizing cooling tank, a high pressure air inlet pipe, a tractor, a seal airbag and an airbag pull rod. By adopting the continuous forming device of the biaxial orientation polyvinyl chloride pipe, an extruded pipe blank not reaching vitrification temperature is cooled evenly, and the inner stress of the pipe blank is removed; the support of the pipe to the tractor is increased, the traction balance is ensured, and thus the stableness and reliability of continuous production of the pipe is ensured.

Description

technical field [0001] The invention relates to a continuous molding device and working method for biaxially oriented polyvinyl chloride pipes, and belongs to the technical field of extrusion molding tools for plastic pipes. Background technique [0002] With the increasing attention to environmental issues, there are requirements for saving materials, reducing energy consumption, and reducing carbon emissions. In the next few years, PVC-O pipes will become a piping system solution to meet these requirements, especially for water supply. , Drinking water and waste water and other fields. Compared with non-polymer pipes, PVC-O has obvious advantages, not only the carbon emission is much lower than traditional products like ductile iron pipes, but also there is no corrosion problem. In addition, the latest information shows that PVC-O pipes are even superior to polyolefin (PO) type pipes, such as PE100 pipes, in the installation of water supply pipes. [0003] The molecular ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/02B29C47/90B29C47/92B29C55/26B29C48/90B29C48/92
CPCB29C48/0018B29C48/901B29C48/904B29C48/905
Inventor 马立旺汤毅孙海勇徐得波汤海敬薛炳建李勇
Owner 山东华信塑胶股份有限公司
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