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Magnetorheological elastomer integral forming device based on multi-field coupling effect

A magnetorheological elastomer and molding device technology, applied in the fields of material science and instrumentation, can solve the problems that the microscopic chain structure cannot be adapted to the application environment, increase unfavorable influencing factors, and the process is cumbersome, so as to simplify the material preparation process. , the effect of reducing adverse factors and simplifying the preparation process

Pending Publication Date: 2018-05-01
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device only considers the effect of heat and magnetism in the material preparation process, but ignores the influence of force on the material preparation effect; the device can only be used in the material pre-structuring stage, and then it will be transferred to the flat vulcanizing machine for curing. It is cumbersome and discontinuous, which increases some adverse factors; in addition, because magnetorheological elastomers are mainly subjected to loads such as tension and compression, shear and torsion in engineering applications, existing devices can only be used in the pre-structuring stage. Provide a unidirectional parallel magnetic field, and the resulting microscopic chain structure cannot adapt to complex application environments

Method used

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  • Magnetorheological elastomer integral forming device based on multi-field coupling effect
  • Magnetorheological elastomer integral forming device based on multi-field coupling effect
  • Magnetorheological elastomer integral forming device based on multi-field coupling effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of natural rubber-based magnetorheological elastomer with inclined chain-like microstructure using the inventive device

[0027] During material preparation, the mixed mixture is injected into the mold 14, and the mold 14 is placed in the holding furnace 20 of the integrated magnetorheological elastomer molding device. In the pre-structuring stage, the power frequency induction power supply 3 is controlled to make the temperature in the mold 14 Stabilize at 80°C, do not activate the motor 5, control the excitation power supply 24 to pass the same current through the two coils 9 and 23, so that a slanted uniform magnetic field with a field strength of 600mT at an angle of 45° to the horizontal line is generated around the mold, and the outside is controlled. Set the pressure machine (not shown in the figure) to load 1MP pressure for 20 minutes, the soft magnetic particles in the mixed material form a chain arrangement in the direction of the magnetic...

Embodiment 2

[0028] Example 2 Preparation of a natural rubber-based magnetorheological elastomer with a helical chain microstructure using the inventive device

[0029]During material preparation, the mixed mixture is injected into the mold 14, and the mold 14 is placed in the holding furnace 20 of the integrated magnetorheological elastomer molding device. In the pre-structuring stage, the power frequency induction power supply 3 is controlled to make the temperature in the mold 14 Stable at 80°C, start the motor 5 to drive the small pulley 6 and the mold 14 to rotate at a certain angular speed, control the excitation power supply 24 to pass a certain amount of current on the coils 9 and 23, so that a spiral field strength along the vertical direction is generated around the mold For a uniform magnetic field of 600mT, control an external press (not shown in the figure) to load 1MP pressure for 20 minutes, and the soft magnetic particles in the mixed material form a chain arrangement in the...

Embodiment 3

[0030] Example 3 Preparation of Polyurethane-Based Magnetorheological Elastomer with Horizontal Chain Microstructure Using the Invention Device

[0031] During material preparation, the mixed mixture is injected into the mold 14, and the mold 14 is placed in the holding furnace 20 of the integrated magnetorheological elastomer molding device. In the pre-structuring stage, the power frequency induction power supply 3 is controlled to make the temperature in the mold 14 Stable at 60°C, do not activate the motor 5, control the excitation power supply 24 to pass current on the coil 23, so that a uniform magnetic field with a field strength of 600mT along the horizontal direction is generated around the mold, and control the external press (not shown in the figure) Load 1MP pressure for 30 minutes, the soft magnetic particles in the mixed material form a chain arrangement in the direction of the magnetic field and initially solidify; then in the curing molding stage, turn off the ex...

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Abstract

The invention discloses a magnetorheological elastomer integral forming device based on a multi-field coupling effect, and belongs to the technical field of material science and instruments. The device comprises a heating module of an electromagnetic induction heating coil and a heat-resisting alloy bar, a magnetizing module composed of two orthogonality magnetic frames and a powered-on coil and apressurizing module composed of an outer pressure machine and a pressing rod; a mold containing raw materials is placed in a heat preservation furnace, at the different stages of material preparing,different thermal magnetic coupling fields are provided by control over parameters of all modules, and the pre-structuring and curing forming process of magnetorheological elastomer preparing can be continuously finished. The device is compact in structure, the coupling field implementation manner is ingenious, the magnetorheological elastomer preparing process is simplified, multi-field environment can be provided for synthesis of other materials, and a spiral magnetic field and a universal magnetic field can be provided for related tests.

Description

technical field [0001] The invention relates to the technical fields of material science and instrumentation, in particular to a magnetorheological elastomer material integral molding device. Background technique [0002] Magnetorheological elastomers incorporate micron-sized ferromagnetic particles into high molecular polymers and solidify in a magnetic field environment, so that the particles in the matrix have a chain or columnar structure. The elastic modulus of this material can change with the strength of the applied magnetic field. Compared with ordinary magnetorheological fluids, it not only has high technical characteristics such as controllability, reversibility, and rapid response, but also has unique advantages such as good stability. , has broad application prospects in vibration reduction, noise reduction and intelligent control. The preparation process of magnetorheological elastomers generally includes the steps of compounding, prestructuring and curing mold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/02B29C43/52B29C43/58B29C43/34B29K75/00B29K105/18
CPCB29C43/003B29C43/027B29C43/34B29C43/52B29C43/58B29C2043/3488B29C2043/5808B29C2043/5816B29K2075/00B29K2105/18
Inventor 徐志强王秋良吴衡易理银张高峰姜胜强朱科军
Owner XIANGTAN UNIV
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