New Rotor with Variable Clearance in the Short Fiber Rubber Composite Mixing

2013 ◽  
Vol 328 ◽  
pp. 387-392
Author(s):  
Cai Jun Liu ◽  
Chuan Sheng Wang
Keyword(s):  
Production Efficiency ◽  
Short Fiber ◽  
Short Fibers ◽  
Mixing Chamber ◽  
Small Clearance ◽  
Rubber Composite ◽  
Mixing Quality ◽  
And Performance

The mixing mechanism of short fiber/rubber composite was analyzed. The clearance between the rotor edge peak and mixing chamber influenced mixing, dispersion and length of the short fibers in compound. The new rotor was designed with variable clearance. The large clearance gap improve the mixing, and the small clearance gap helped to improve the dispersion of short fiber. The mixing quality and performance of short fiber/rubber composite were improved by using the new rotor, and the production efficiency increased.

Mixing Short Fiber-Rubber Composite by New Rotor with Variable Clearance

2013 ◽  
Vol 744 ◽  
pp. 301-305
Author(s):  
Xue Zheng Han ◽  
Cai Jun Liu
Keyword(s):  
Production Efficiency ◽  
Short Fiber ◽  
Short Fibers ◽  
Mixing Chamber ◽  
Small Clearance ◽  
Rubber Composite ◽  
Mixing Quality ◽  
And Performance

The mixing mechanism of short fiber/rubber composite was analyzed. The clearance between the rotor edge peak and mixing chamber influenced mixing, dispersion and length of the short fibers in compound. The new rotor was designed with variable clearance. The large clearance gap improve the mixing, and the small clearance gap helped to improve the dispersion of short fiber. The mixing quality and performance of short fiber/rubber composite were improved by using the new rotor, and the production efficiency increased.

Experimental Study on Manufacturing Process of Short Fiber-Rubber Composite Material Using New Type Six-Wing Synchronous Rotor

2009 ◽  
Vol 87-88 ◽  
pp. 317-322
Author(s):  
De Wei Zhang ◽  
Chuan Sheng Wang
Keyword(s):  
Experimental Study ◽  
Composite Material ◽  
Manufacturing Process ◽  
Short Fiber ◽  
Short Fibers ◽  
Rubber Composite ◽  
New Type ◽  
Mechanical Performances

A new type of six-wing synchronous rotor has been designed and manufactured for mixing requirements of the short fiber-rubber composite material. During the manufacturing process of the composite material, different addition proportions of the short fibers have been used. The physical and mechanical performances of the short fiber-rubber composite material have been investigated. The new type rotor meets the mixing requirements of the short fiber-rubber composite material, with the best addition proportion of the short fibers.

Extrusion-Shaping of Curved Hose Reinforced with Short Cellulose Fibers

1981 ◽  
Vol 54 (2) ◽  
pp. 277-301 ◽  
Author(s):  
L. A. Goettler ◽  
A. J. Lambright ◽  
R. I. Leib ◽  
P. J. DiMauro
Keyword(s):  
Structural Integrity ◽  
Extrusion Direction ◽  
Hydraulic Cylinder ◽  
Short Fiber ◽  
Industrial Applications ◽  
Stepper Motor ◽  
Short Fibers ◽  
Shape Distortion ◽  
Extrusion Head ◽  
And Performance

Abstract A new development in hose technology, the direct shaping of curved hose reinforced with short fibers at the extrusion die, is described. By moving the inner and outer portions of the tube die out of concentricity in a programmed sequence, the extrusion direction can be made to deviate from the machine axis and thus to produce bends in the hose. This process has been demonstrated on planar S-bends of a 38 mm hose. Bend radii as tight as 13 mm to the inside of the bend are feasible. Such a hose might find various industrial applications. Performance characteristics are similar to cord reinforced coolant hoses. The reproducibility of the die motions and timing sequences to produce the hose shapes are maintained by a digitally controlled hydraulic cylinder that is driven through a stepper motor. The driver for the stepper motor could involve hard-wired or microprocessor circuitry. All of the components for this system are commercially available with the exception of a customized extrusion head to accomodate the mounting and connection of the hydraulic cylinder. This unique process for producing curved hose is contingent upon the use of short fiber reinforcement for several reasons: (a) The reinforcement must be present in the stock before it is extruded. (b) The dispersed short fibers give the hot extruded hose structural integrity to minimize shape distortion before cure. (c) The hoop-wise fiber orientation pattern produced in the novel conically expanding die is augmented by additional reinforcement in the thinner hose wall that occurs on the inside of the bend. An important consequence of the third item above is that the curved hose sections display practically the same burst strength as a straight section, despite the wall thinning that occurs as a result of offsetting the die and pin. The production and performance of these short-fiber reinforced curved hoses can be rationalized in terms of the fluid and mechanical behavior of short fiber composites.

Study the Method of the Polyester Short Fiber-Nature Rubber Composite Mix

2013 ◽  
Vol 650 ◽  
pp. 119-124
Author(s):  
Cai Jun Liu ◽  
Xue Zheng Han ◽  
Shi Tian Su
Keyword(s):  
Composite Materials ◽  
Carbon Black ◽  
Short Fiber ◽  
Short Fibers ◽  
Final Performance ◽  
Good Dispersion ◽  
Subsequent Processing ◽  
Direct Bearing ◽  
Rubber Composite

Mixing is the first step for rubber processing. For the short fiber-rubber composite materials, whether the short fibers, carbon black and other additives in the rubber are dispersed well or not has a direct bearing upon the subsequent processing of materials and final performance. Because of the softness of the short fibers, they are easy to group or break during the process of mixing. The research in this paper is conducted by experiment on the methods which are applicable for mixing or mixing rotor of short fiber-rubber composite materials so as to guarantee the materials have good dispersion and the short fibers have rational L/D ratio.

Experimental Study of Screw Speed Effects on Quality of Short Fiber-Rubber Composite Material

2011 ◽  
Vol 221 ◽  
pp. 369-372 ◽  
Author(s):  
Chuan Sheng Wang ◽  
De Wei Zhang ◽  
Hui Guang Bian ◽  
Xiao Bo Wang ◽  
Lei Guo
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Composite Material ◽  
Physical And Mechanical Properties ◽  
Short Fiber ◽  
Experimental Results ◽  
Short Fibers ◽  
Screw Speed ◽  
Rubber Composite

During the extruding process of short fiber-rubber composite material, screw speed is an important factor which influences the orientation of short fibers, as well as the physical and mechanical properties of short fiber-rubber composite material. The effects of different screw speeds on physical and mechanical properties of short fiber-rubber composite material have been studied by experimental study. In the experiments, the screw speeds were 10rpm, 15rpm, 20rpm, 25rpm and 30rpm respectively. The experimental results indicated that when the screw speed was 15rpm, the physical and mechanical properties of short fiber-rubber composite material are better.

Effect of Die Structure on Radial Orientation of Short Fiber in Tire Tread and its Performance

2012 ◽  
Vol 501 ◽  
pp. 247-252 ◽  
Author(s):  
De Wei Zhang ◽  
Chuan Sheng Wang ◽  
Guang Yi Lin ◽  
Shao Ming Li ◽  
Chun Ping Chen
Keyword(s):  
Composite Material ◽  
Short Fiber ◽  
Channel Length ◽  
Channel Height ◽  
Manufacturing Processes ◽  
Short Fibers ◽  
Orientation Degree ◽  
Radial Orientation ◽  
Die Structure ◽  
Rubber Composite

Extrusion and molding is one of the most important manufacturing processes of short fiber-rubber composite material. In order to be used to tire tread, the short fibers in rubber are wanted to be radial orientated. But the orientation of short fibers depends on the die structure, and the performances of short fiber-rubber composite material depend on the radial orientation degree of short fibers. So, the die structure has been studied by experiments in order to get a proper die structure for manufacturing of short fiber-rubber composite material. The experimental results indicate that the proper die structure parameters are: the molding length is 15mm, the molding height is 9mm, the channel length is 75mm, the channel height is 12mm and the channel angle is 135º.

Research on Vulcanization Process of Short Fiber-Rubber Composite Material

2012 ◽  
Vol 501 ◽  
pp. 325-329
Author(s):  
Chuan Sheng Wang ◽  
De Wei Zhang ◽  
Lei Guo ◽  
Xian Kui Zeng ◽  
Xiao Bo Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Physical And Mechanical Properties ◽  
Short Fiber ◽  
Short Fibers ◽  
Iron Wire ◽  
Rubber Composite ◽  
Fibers Orientation ◽  
Vulcanization Process

Vulcanization process is the last step of manufacturing rubber products. For tire tread which is made of short fiber rubber composite material, vulcanization is complex due to during vulcanization process the flow of mixed rubber maybe change short fibers orientation. As a result, during vulcanization process, several pieces of iron wire have been put in the mold to play the role of tire patterns for the first step research. The experimental results indicate that the flow of mixed rubber would not change short fibers orientation greatly, and physical and mechanical properties of short fiber-rubber composite material keep as good as that vulcanized without iron wire.

The Mechanical Behavior of Short-Fiber-Elastomer Composites

1976 ◽  
Vol 49 (5) ◽  
pp. 1167-1181 ◽  
Author(s):  
A. Y. Coran ◽  
P. Hamed ◽  
L. A. Goettler
Keyword(s):  
Test Piece ◽  
Composite Plates ◽  
Short Fiber ◽  
Strength Properties ◽  
Unidirectional Composite ◽  
Short Fibers ◽  
Principal Stresses ◽  
Elastomer Composites ◽  
Ultimate Limit ◽  
Time Of Failure

Abstract The measured elastic and strength properties of angle-ply composites of short fibers and rubber depend on test-piece geometry. In general, higher tensile moduli and strengths are obtained when plies are both thin and wide. Once the effects of test-piece geometry are taken into account, elastic properties can be calculated as functions of the properties of a single ply. Classical compliance transformation equations can be used. However, because of the invariance of shear modulus in aligned composites, the tensor transformation equations are somewhat simplified. Tensile strengths of off-axis unidirectional composite plates and balanced-angle plies can be fitted by Hill's criterion. Unidirectional composites tend to fail in the weakest mode, depending on the angle of stress, but laminating causes all principal stresses in a ply to be near their ultimate limit at the time of failure.

Crack Resistance Function Analysis of Flexible Short Fiber in Asphalt

2011 ◽  
Vol 243-249 ◽  
pp. 4182-4187
Author(s):  
Zhi Yong Ding ◽  
Jing Liang Dai ◽  
Bo Peng
Keyword(s):  
Mechanical Model ◽  
Function Analysis ◽  
Short Fiber ◽  
Calculation Model ◽  
Tensile Failure ◽  
Spherical Coordinates ◽  
Short Fibers ◽  
Flexible Fiber ◽  
Fiber Bridging ◽  
Resistance Function

after reasonably analyzing characteristics of flexible fiber reinforcement fragile material, the mechanical model of individual fiber is established while being pulled out from asphalt; the spherical coordinates is adopted to establish the calculation model for short fiber bridging stress evenly distributed in space to calculate the value of bridging stress generated by short fibers while asphalt is breaking; the fiber asphalt sample in big size is adopted to perform low temperature tensile failure test to practically measure bridging stress of short fiber; fit the calculated value and measured value of bridging stress by adjusting parameters in the calculation model to check the rationality of fiber bridging stress in calculation method and model.

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