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Method for preparing silicon rubber porous material based on additive manufacturing technology

A porous material and additive manufacturing technology, applied in the field of preparing silicone rubber porous materials based on additive manufacturing technology, can solve problems such as no mature technology, and achieve the effect of customization, precise control, and regulation.

Active Publication Date: 2016-05-25
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of thermoplastic materials, there are commercial 3D printing equipment and materials suitable for 3D printing molding, but there is no mature technology for 3D printing of thermosetting elastomer materials such as silicone rubber.

Method used

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  • Method for preparing silicon rubber porous material based on additive manufacturing technology
  • Method for preparing silicon rubber porous material based on additive manufacturing technology
  • Method for preparing silicon rubber porous material based on additive manufacturing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 100g of viscosity is 5000mPa.s terminal vinyl polydimethylsiloxane, 15g of gas-phase process hydrophilic white carbon black is mixed evenly with a mechanical stirring device, and then 5 parts of hydrogen-containing silicone oil with a hydrogen weight fraction of 7% are added. After the mechanical stirring device is mixed evenly, add the mixed solution of 0.5g tetramethyltetravinylcyclotetrasiloxane inhibitor and platinum-vinylsiloxane complex (the mass fraction of platinum is 2×10 -3) Stir and mix evenly; put the above-mentioned glue into the barrel of the glue dispenser, seal the outlet of the barrel with a cover, then place the barrel in a defoaming machine to remove the air bubbles in the glue, and then put the glue The barrel is connected to the gas-driven valve of the dispenser and fixed on the three-axis mobile platform, and the sealing cap of the barrel is replaced with an extrusion needle with an inner diameter of 0.41mm; the pressure of the dispenser is set to 3...

Embodiment 2

[0043] Mix 100g of hydroxyl-terminated polydimethylsiloxane with a viscosity of 10000mPa.s and 40g of gas-phase hydrophobic silica with a mechanical stirring device, then add 5 parts of tetrapropoxysilane, and mix with a mechanical stirring device , add 0.5 parts of dibutyltin dilaurate, stir evenly; put the above rubber material into the barrel of the glue dispenser, seal the discharge port of the barrel with a cap, then place the barrel in a defoaming machine to remove the glue Bubbles in the material, then connect the barrel with the gas-driven valve of the dispenser and fix it on the multi-axis mobile platform, replace the barrel sealing cap with an extrusion needle with an inner diameter of 0.46mm; set the pressure of the dispenser to 550kPa, Input the coordinate parameters of the mobile platform running on each layer, start the equipment and run the program, so that the mobile platform will run according to the preset program in the three coordinate directions of x, y, an...

Embodiment 3

[0045] Mix 100g of terminal vinylmethylphenyl silicone rubber with a viscosity of 2500mPa.s, 10g of fumed hydrophilic silica, and 30g of fumed hydrophobic silica, and then add 10 parts of hydrogen containing 3.5% Mix the hydrogen silicone oil evenly, and finally add 0.5g of tetramethyltetravinylcyclotetrasiloxane and 0.1g of platinum catalyst with a mass fraction of 1% of Pt and mix evenly; Seal the discharge port of the material cylinder, then place the material cylinder in the degassing machine to remove the air bubbles in the rubber material, then connect the material cylinder with the gas-driven valve of the glue dispenser and fix it on the multi-axis mobile platform, and put the material Replace the cylinder sealing cap with an extrusion needle with an inner diameter of 0.65mm; set the pressure of the dispenser to 300kPa, input the coordinate parameters of the mobile platform running on each layer, start the equipment and run the program, so that the mobile platform is in ...

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Abstract

The invention discloses a method for preparing a silicon rubber porous material based on an additive manufacturing technology. The method disclosed by the invention comprises the following steps: step 1, mixing to prepare a basic rubber material; step 2, carrying out de-foaming treatment on the basic rubber material; step 3, pre-forming the silicon rubber porous material; and step 4, carrying out vulcanization molding on a pre-formed sample. Based on an additive manufacturing (3D printing) technology principle of manufacturing in a layered manner and superposing layer by layer, the silicon rubber porous material is prepared by adopting a multi-axis movable platform and rubber direct writing equipment; the disadvantages of an ordinary die pressing and injection molding method based on solventing out and pore formation and chemical foaming principles can be overcome; the silicon rubber porous material with a specific bubble pore structure, which cannot be prepared through a common method, is obtained; and customization and accurate control of the bubble pore structure of the silicon rubber porous material are realized, so that performances of the silicon rubber porous material can be regulated and controlled.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a method for preparing porous silicone rubber materials based on additive manufacturing (3D printing) technology. Background technique [0002] Silicone rubber porous material integrates the characteristics of silicone rubber and foam material. It not only has the excellent high and low temperature resistance, radiation resistance, chemical stability and electrical insulation of silicone rubber, but also has the light weight, high strength and sound insulation of foam material. , heat insulation and damping properties, so as damping and vibration reduction materials, sound insulation materials, precision device packaging materials, etc., it has been more and more widely used in high-tech fields such as aerospace, advanced weapons, and electronics industry. [0003] At present, the most commonly used methods for the preparation of silicone rubber porous materials are dis...

Claims

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Application Information

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IPC IPC(8): B29C67/20B29C35/02C08L83/06C08L83/07C08L83/04C08K3/36
CPCC08K3/36C08L83/04B29C35/02B29C67/20C08L2205/025C08K2201/014C08L83/06
Inventor 余凤湄耿呈桢芦艾赵秀丽刘小兵雷卫华张倩李野
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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