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A kind of manufacturing equipment of biaxially oriented PVC and polyolefin material pipes and its production process and method

A technology of biaxial orientation and manufacturing equipment, which is applied in the direction of tubular objects, other household utensils, household utensils, etc., can solve the problems of poor high temperature resistance, low toughness and strength, and limited orientation ratio, so as to improve the strength and toughness Improved strength, strength and toughness, producing long-lasting and consistent results

Active Publication Date: 2015-08-05
四川省天知椒子生态农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVC pipes also have the following disadvantages: 1. Its high temperature resistance is not good, and it is easy to deform when working in a hot environment, so it is not suitable for hot water pipes; 2. Its toughness and strength are low, and its cracking and impact resistance is poor.
The main limitations of the "offline" process are the low extrusion speed and the high investment costs per unit of output
In addition, due to the difference in thickness and temperature around the blank tube, the tolerance of free expansion is difficult to control
In order to achieve accurate and uniform temperature conditions, the required cycle time is long, the production speed of the "offline" processing technology is low, and the equipment investment is high, so it is difficult to be popularized
[0004] In addition, there is currently a one-step method for production, but due to the limitation of the orientation ratio, such as the core expansion mechanism is limited by its own stretch, it is difficult to achieve the ideal orientation value, so it cannot meet people's production requirements

Method used

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  • A kind of manufacturing equipment of biaxially oriented PVC and polyolefin material pipes and its production process and method
  • A kind of manufacturing equipment of biaxially oriented PVC and polyolefin material pipes and its production process and method
  • A kind of manufacturing equipment of biaxially oriented PVC and polyolefin material pipes and its production process and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] To make a biaxially oriented pipe with an outer diameter of 75 mm and a thickness of 1.9 mm made of PVC, the production process is as follows:

[0028] 1): Pre-start the extruder 1, send the prefabricated pipe to the tractor 6 and clamp it;

[0029] 2): Pass the drawstring 8 at the outlet end of the pipe forming die 2 through the pipe, and block the inside of the pipe with an elastic plug 9;

[0030] 3): Start the compressor 7, the extruder 1 and the tractor 6, and the pipe is conveyed forward at a speed of 2.8m / min. At this time, ensure that the inside of the pipe is under a positive pressure of 0.1MPa;

[0031] 4): When the pipe passes through the expansion temperature adjustment zone 3, reduce the temperature of the pipe to 120°C;

[0032] 5): When the pipe passes through the expansion and sizing area 4, the diameter of the pipe is expanded and stretched according to the shape of the pipe in the expansion and sizing area 4 under the action of air pressure, and the e...

Embodiment 2

[0036] To make a biaxially oriented pipe with an outer diameter of 50mm, a thickness of 4.6mm, and a material of PP, the production process is as follows:

[0037] 1): Pre-start the extruder 1, send the prefabricated pipe to the tractor 6 and clamp it;

[0038] 2): Pass the drawstring 8 at the outlet end of the pipe forming die 2 through the pipe, and block the inside of the pipe with an elastic plug 9;

[0039] 3): Start the compressor 7, the extruder 1 and the tractor 6, and the pipe is conveyed forward at a speed of 2.2m / min. At this time, ensure that the inside of the pipe is under a positive pressure of 0.3MPa;

[0040] 4): When the pipe passes through the expansion temperature adjustment zone 3, reduce the temperature of the pipe to 150°C;

[0041] 5): When the pipe passes through the expansion and sizing area 4, the diameter of the pipe is expanded and stretched according to the shape of the pipe in the expansion and sizing area 4 under the action of air pressure, and...

Embodiment 3

[0045] To make a biaxially oriented pipe with an outer diameter of 160mm, a thickness of 6.0mm, and a material of PE, the production process is as follows:

[0046] 1): Pre-start the extruder 1, send the prefabricated pipe to the tractor 6 and clamp it;

[0047] 2): Pass the drawstring 8 at the outlet end of the pipe forming die 2 through the pipe, and block the inside of the pipe with an elastic plug 9;

[0048] 3): Start the compressor 7, the extruder 1 and the tractor 6, and the pipe is conveyed forward at a speed of 1.6m / min. At this time, ensure that the inside of the pipe is under a positive pressure of 0.5MPa;

[0049] 4): When the pipe passes through the expansion temperature adjustment zone 3, reduce the temperature of the pipe to 150°C;

[0050] 5): When the pipe passes through the expansion and sizing area 4, the diameter of the pipe is expanded and stretched according to the shape of the pipe in the expansion and sizing area 4 under the action of air pressure, and ...

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Abstract

The invention discloses manufacturing equipment and a production process and method of a biaxial orientation PVC (Poly Vinyl Chloride) and polyolefin material pipe. The manufacturing equipment comprises an extruding machine, wherein an outlet of the extruding machine is connected with a pipe forming die head; a dilation temperature regulating region, a dilation diameter-fixing region and a cooling sizing region are sequentially arranged at the outlet end of the pipe forming die head; a traction machine is arranged on the outlet end of the pipe forming die head at last, the dilation temperature regulating region is a straight line pipe with a cooling effect, the dilation diameter-fixing region is a horn-shaped dilation pipe, the cooling sizing region is a straight line pipe which is consistent with the dilation diameter-fixing region in maximum diameter, the pipe forming die head is connected with a compressor, an air pipe of the compressor is communicated with a vent hole in the middle of the pipe forming die head, the outlet of the pipe forming die head is connected with a drawing rope, and the other end of the drawing rope is connected with an elastic plug for plugging the pipe. With the manufacturing equipment, molecules of the pipe are arranged from a disordered manner to an ordered manner, and the strength and the toughness of the pipe can be greatly improved due to molecular orientation change.

Description

technical field [0001] The invention relates to a biaxially oriented PVC and polyolefin material pipe manufacturing equipment and its production process and method, belonging to the field of polymer molding and processing. Background technique [0002] Due to its advantages such as high modulus, high strength and low price, PVC pipe has always been the most widely used plastic piping system in the world, and has been widely used in many fields in modern society. my country's plastic pipe industry has developed rapidly and has become one of the world's largest countries in the production and application of plastic pipes. However, PVC pipes also have the following disadvantages: 1. Its high temperature resistance is not good, and it is easy to deform when working in a hot environment, so it is not suitable for hot water pipes; 2. Its toughness and strength are low, and its cracking and impact resistance is poor. . [0003] At present, many high molecular polymers can be arra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/00B29C47/90B29L23/00B29C48/90
Inventor 龙鳞丰
Owner 四川省天知椒子生态农业有限公司