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Dynamic stretching-based ultra-high molecular weight polymer rolling forming method

An ultra-high molecular weight, forming equipment technology, applied in the field of ultra-high molecular weight polymer roll forming, can solve the problems of shear sensitivity, poor processing fluidity, small processing temperature range, etc., to reduce forming difficulty, increase output, reduce energy consumption effect

Pending Publication Date: 2018-12-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the technical problems existing in the prior art, the object of the present invention is: to provide a method for rolling forming of ultra-high molecular weight polymers based on dynamic extension, which overcomes the problem that ultra-high molecular weight polymers are sensitive to shear, processing temperature range Difficulties in extrusion molding such as small size and poor processing fluidity

Method used

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  • Dynamic stretching-based ultra-high molecular weight polymer rolling forming method
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  • Dynamic stretching-based ultra-high molecular weight polymer rolling forming method

Examples

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Effect test

Embodiment 1

[0043] Roll-forming equipment for ultra-high molecular weight polymer pipes based on dynamic stretching, such as figure 1 Shown, including extensional rheological extruder and roll forming die. In this embodiment, the elongational rheological extruder adopts the eccentric rotor extruder described in the invention patent with the authorized notification number CN104002447B, including a power system 2, a stator 3 and a rotor 4, and the power system includes a motor 1.

[0044] The rolling die head includes an outer die 5, a mandrel 6 and a temperature control system arranged on the outer circumference of the outer die. The stator 3 is connected to the outer die 5 coaxially, and the mandrel 6 is connected to the rotor 4 coaxially.

[0045] During installation, the axis O of mandrel 6 2 Axis O with the outer die 5 1 There is an eccentricity e. The roll forming die head is divided into embryo forming area, compression area and sizing area sequentially along the flow direction; t...

Embodiment 2

[0051] UHMW polymer sheet roll forming equipment based on dynamic stretching, such as Figure 6 As shown, it includes an extensional rheological extruder, a roll forming die head, and a sheet calendering roll assembly. The sheet calendering roll assembly is composed of two counter-rotating sheet calendering rolls 8, and between the two sheet calendering rolls The gap is the forming thickness of the sheet product 9, and the gap between the two calender rolls is adjustable, such as Figure 7 shown.

[0052] Based on the dynamic stretching ultra-high molecular weight polymer sheet rolling forming method, after the tubular embryo is obtained by the method of Example 1, it is formed into a sheet product 9 under the rolling of the sheet calendering roller assembly.

[0053] Parts not mentioned in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0055] UHMW polymer fiber roll-forming equipment based on dynamic stretching, such as Figure 8 As shown, it comprises an extensional rheological extruder, a roll forming die, a sheet calendering roll assembly, a cutting roll assembly, a rolling roll assembly and a traction roll 14; the cutting roll assembly is composed of a cutting roll 10 with a tapered knife and an The cutting roller 15 of tapered cutter is formed, and the surface equidistant of the cutting roller with tapered cutter is provided with some circumferential tapered grooves to form equidistant tapered cutter, as Figure 9 As shown; the rolling roll assembly is made up of two rolling rolls 12, and the surface of the rolling rolls is equidistantly provided with some circular arc grooves, and the circular arc grooves between the two rolling rolls form a number of cylindrical shapes one by one. cavity, such as Figure 10 shown.

[0056] Based on the ultra-high molecular weight polymer fiber rolling forming method...

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Abstract

The invention relates to a dynamic stretching-based ultra-high molecular weight polymer rolling forming method. An extensional rheology extruder is used for molten plasticizing of an ultra-high molecular weight polymer raw material and is used for transporting the ultra-high molecular weight polymer raw material to a rolling forming die head based on dynamic stretching, melt firstly forms a large-diameter tubular blank having a non-uniform wall thickness in the rolling forming die head, the non-uniform tubular blank is continuously stretched and compressed in the circumferential direction andthe axial direction under the radial rolling action of an eccentric rotating mandrel to be uniform or to trend to uniform, a converging flow path of the rolling forming die head also enables the tubular blank to extend in the axial direction, and finally the tubular blank is rolled into a tubular blank having a uniform wall thickness. The method overcomes the extrusion molding machining problems that ultra-high molecular weight polymer is sensitive to shearing, small in processing temperature range, poor in processing fluidity and the like. The invention further relates to dynamic stretching-based ultra-high molecular weight polymer rolling forming equipment. The equipment is suitable for mass production of ultra high molecular weight polymer pipes, sheets, fibers and membrane products. The dynamic stretching-based ultra-high molecular weight polymer rolling forming method and equipment belong to the field of ultra-high molecular weight polymer extrusion processing.

Description

technical field [0001] The invention relates to the field of extrusion processing of ultra-high molecular weight polymers, in particular to an ultra-high molecular weight polymer rolling forming method and equipment based on dynamic extension. Background technique [0002] Ultra-high molecular weight polymers refer to polymer materials with extremely high molecular weight, which have superior comprehensive properties, especially excellent properties that ordinary polymer materials do not have. For example, ultra-high molecular weight polyethylene (UHMWPE) is a new type of thermoplastic engineering material with excellent properties such as impact resistance, wear resistance, self-lubrication, non-toxicity, chemical inertness, and low temperature resistance. It is widely used in textiles, papermaking, etc. , food, chemical, packaging, construction, medical, military and other fields; polytetrafluoroethylene (PTFE), known as the king of plastics, has high temperature resistanc...

Claims

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Application Information

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IPC IPC(8): B29C47/20B29C43/24B29C69/00B29C48/32
CPCB29C43/24
Inventor 瞿金平
Owner SOUTH CHINA UNIV OF TECH
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