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A low-melting-point core constituent material and low-melting-point core for preparing complex inner cavity parts

A composition material, low melting point technology, applied in the field of low melting point core, low melting point core composition material, can solve the problems of easy volatilization, environmental pollution, low hardness, etc., and achieve the effect of low cost

Active Publication Date: 2019-01-08
北京鸿鹄雄狮技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct selection of traditional existing materials will encounter some problems, such as low-melting point metal alloys, such as lead-tin alloys used as fuses, have low hardness and high density at room temperature; use inorganic crystals such as sulfur, which are volatile and sublimable Causes a strong smell and seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The implementation process of the technical solution of this embodiment is as follows:

[0033] (1-1) Cast the core constituent material into a block, and then process it into a spiral shape by machining; or directly heat the core constituent material to 80°C or 100°C or 120°C and inject it into the spiral cavity In the mold, after cooling and demolding, a spiral-shaped core is obtained. Then wrap a non-porous film of polytetrafluoroethylene outside the core to seal.

[0034] (1-2) At room temperature, the continuous carbon fiber pre-impregnated with medium-temperature curing epoxy resin is wound on the non-porous film surface of the polytetrafluoroethylene of the above-mentioned core to obtain a core that wraps the composite material prefabricated body, and then puts it into the mold, The polytetrafluoroethylene non-porous film at both ends of the core is sealed to the mold wall to ensure gas isolation between the core and the composite material preform. Use the vacu...

Embodiment 2

[0043] The implementation process of the technical solution of this embodiment is as follows:

[0044] (2-1) Raise the temperature of the core constituent material to 130°C, inject it into a zigzag nylon sealed bag with a prefabricated cavity, and obtain a core with a nylon sealed bag on the outside and a fusible core constituent material inside. . Then wrap a non-porous film of polytetrafluoroethylene outside the core to seal.

[0045] (2-2) At room temperature, unidirectional continuous carbon fiber or glass fiber prepreg pre-impregnated with medium-temperature curing epoxy resin or polyester or benzoxazine is spread on the non-porous film surface of polytetrafluoroethylene of the above-mentioned core , and then put it into the mold, fix and seal the outlets of the nylon sealing bags at both ends of the core to the liquid injection / gas injection valve, so as to ensure the gas isolation between the core and the composite material prefabricated body. Then, the reserved air p...

Embodiment 3

[0052] The implementation process of the technical solution of this embodiment is as follows:

[0053] (3-1) Prepare a prefabricated cavity shaped as a U-shaped nylon sealed bag, insert one or two strip-shaped heating resistors inside, so that the length of the heating resistor is similar to the length of the U-shaped cavity; The material is heated to 140° C. and injected into the cavity of the nylon sealed bag to obtain a mold core covered with a nylon sealed bag and a fusible core constituent material inside. Then wrap a non-porous film of polytetrafluoroethylene outside the core to seal;

[0054] (3-2) At room temperature, the unidirectional continuous carbon fiber pre-impregnated with Shuangma resin is wound on the surface of the non-porous film of polytetrafluoroethylene of the above-mentioned core to obtain a composite material prefabricated body, which is then put into a mold, and the two cores are The outlet of the nylon sealing bag at the end is fixed and sealed to t...

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Abstract

The invention discloses a low-melting-point mould core forming material for preparing a complex inner cavity part and a low-melting-point mould core. The low-melting-point mould core forming material satisfies the following conditions that the low-melting-point mould core forming material is a hard solid below 20 DEG C; the glass-transition temperature is higher than 20 DEG C; the low-melting-point mould core forming material forms a flowable liquid with the viscosity lower than 200 Pa.s when the temperature is lower than 180 DEG C. The material can be applied to preparing various low-melting-point mould cores with complex structures, and is nontoxic, reusable, low in cost, and light in weight.

Description

technical field [0001] The invention relates to the technical field of preparation of structural composite parts, in particular to a low-melting-point core constituent material and a low-melting-point core for preparing complex inner-cavity parts. Background technique [0002] Continuous fiber-reinforced resin-based composite parts have high specific strength and specific stiffness, and are more and more widely used in aerospace, oil pipelines, high-pressure vessels, civil sports equipment and other fields. The preparation methods of continuous fiber-reinforced resin-based composite parts mainly include: lay-up molding, winding molding, and the newly developed 3D printing technology. The winding molding method is mainly used for the preparation of pipes, containers or complex core-containing structural parts, such as oil pipelines, high-pressure gas cylinders, blades of ships or helicopters, civil lightweight hollow equipment, etc. Usually, the fibers are pre-impregnated and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08L63/00C08L85/02C08K13/04C08K7/06C08K3/04C08K3/36C08L67/02C08L69/00C08L67/00C08K7/00C08K3/22C08K3/26B29C33/52B29C33/38
CPCB29C33/38B29C33/52C08K3/22C08K3/26C08K2003/2224C08K2003/265C08K2201/011C08L63/00C08L67/00C08L67/02C08L2201/02C08L2205/025C08L2205/03C08L85/02C08K13/04C08K7/06C08K3/04C08K3/36C08L69/00C08K7/00
Inventor 冯跃飞
Owner 北京鸿鹄雄狮技术开发有限公司
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