CN113601686A - Tool for preparing C/C composite material by liquid-phase impregnation and furnace charging method - Google Patents

Abstract

The invention relates to the field of C/C composite materials, in particular to a tool for preparing a C/C composite material by liquid-phase impregnation. The method comprises the following steps: the dipping barrel is used for placing the stainless steel barrel in the pressure dipping furnace; the dipping material frame consists of a chassis with holes, a stand column and a top lifting hook and is placed in a dipping barrel; a spacer for spacing each layer of stock. The tool and the gasket are made of stainless steel. By adopting the method, the C/C composite material blank is subjected to liquid-phase impregnation charging, so that the problems of less charging amount and more impregnant of a steam-cage type impregnation material rack are solved; the common material rack can be adhered together after the stacked multilayer blanks are impregnated. The production capacity of a single furnace is improved, and therefore the working efficiency is improved.

Description

Tool for preparing C/C composite material by liquid-phase impregnation and furnace charging method

Technical Field

The invention relates to the field of C/C composite materials, in particular to a tool for preparing C/C composite materials through liquid-phase impregnation and a furnace charging method.

Background

The C/C composite material is used as the only high-temperature structural material capable of being used at the temperature of more than 2800 ℃, and is widely applied to nose cone caps of aerospace planes, throat liners of rocket engines and the like. In the aspect of preparation process, a liquid phase impregnation/carbonization process, a hot isostatic pressing process, a CVI process and the like are developed, so that the manufacturing cost is reduced, and the application range of the C/C composite material is greatly expanded.

Liquid phase impregnation is usually carried out in a pressure impregnation furnace, and there are mainly two methods, resin impregnation and pitch impregnation, depending on the impregnant. The commonly used resin comprises furfuryl ketone resin, furfural resin, phenolic resin and the like; the asphalt includes high-temperature coal asphalt, medium-temperature coal asphalt and the like. The resin is usually impregnated in a furnace, then the excess resin is discharged, and then the temperature is raised to finish curing; and (4) carrying out dipping and cooling on the asphalt, wherein dipping tools are needed for the asphalt and the asphalt.

The dipping tool consists of a dipping barrel and a dipping material rack. The dipping barrel is a stainless steel barrel which can be placed in a pressure dipping furnace, and the equipment is usually self-contained; the dipping material frame is a frame which can be placed in the dipping barrel and can be hoisted. In order to place as many billets as possible while preventing the multiple layers of billets from sticking together after impregnation, the inner portion is provided in the form of a "basket", i.e. multiple layers of spacers, to place multiple billets. Although a plurality of layers of C/C composite material blanks can be placed on the liquid-phase impregnation rack in a steaming cage type, blanks lower than the layer height need to be placed on the liquid-phase impregnation rack, if blanks with different heights or blanks with heights not suitable for the interlayer height are placed on the liquid-phase impregnation rack, large pores exist in the blanks, and an impregnant is required to be impregnated to fill the gaps among the blanks and cover the blanks, so that the required amount of resin or asphalt is large, the single-furnace charging is small, and the equipment cannot be fully utilized.

Disclosure of Invention

Technical problem to be solved by the invention

The invention provides a tooling for preparing C/C composite material liquid phase impregnation, which aims to solve the problems that a steaming cage type impregnation rack only can place blanks lower than the height of an interlayer in a single layer, so that the required impregnation amount is large and the charging amount is small each time; meanwhile, the problem that when a plurality of layers of blanks are placed in a common dipping rack, the blanks are adhered together after being dipped is solved.

Technical scheme adopted by the invention for solving technical problem

A preparation C/C combined material liquid phase flooding frock includes:

the dipping barrel is used for placing the stainless steel barrel in the pressure dipping furnace;

the dipping material frame consists of a chassis with holes, a stand column and a top lifting hook and is placed in a dipping barrel;

a spacer for spacing each layer of stock.

Further, the gasket has a size of (30-50) mmX (30-100) mmX (1-2) mm.

Further, frock and gasket select for use stainless steel material.

A furnace charging method using a C/C composite material liquid phase impregnation tool comprises the following steps:

1) orderly and densely placing a first layer of blank at the bottom of the material rack, wherein the first layer of blank does not exceed the edge of the bottom layer of the material rack;

2) placing 2-4 stainless steel gaskets on each blank according to the size of the blank, then placing upper-layer blanks, ensuring the stability of the upper-layer blanks according to the number and size of the gaskets, and sequentially stacking and loading the upper-layer blanks into the blanks according to the mode of each layer of blanks plus the gaskets;

3) hoisting the impregnation rack filled with the blank into an impregnation barrel, and loading the impregnation rack into a pressure impregnation furnace to start impregnation;

4) and discharging after the impregnation is finished, discharging after the blank is cooled, and shoveling off the stainless steel gasket on the blank by using a shovel blade, wherein the stainless steel gasket can be repeatedly used.

Advantageous effects obtained by the present invention

By adopting the method, the C/C composite material blank is subjected to liquid-phase impregnation charging, so that the problems of less charging amount and more impregnant of a steam-cage type impregnation material rack are solved; the common material rack can be adhered together after the stacked multilayer blanks are impregnated. The production capacity of a single furnace is improved, and therefore the working efficiency is improved.

Drawings

FIG. 1: a schematic diagram of a dipping rack;

FIG. 2: a material rack chassis top view;

FIG. 3: a schematic view of a gasket;

wherein: 1-a rack hook; 2-material rack upright post and 3-material rack chassis.

Detailed Description

A tool for preparing C/C composite material liquid phase impregnation and a furnace charging method are provided, wherein a stainless steel material frame with a hole on a chassis, a stand column and a hoisting function is designed, and a plurality of (30-50) mmX (30-100) mmX (1-2) mm stainless steel gaskets are processed.

A tool for preparing C/C composite material by liquid phase impregnation and a furnace charging method are disclosed, and the specific using method is as follows:

1) designing and processing a stainless steel material rack with the size capable of being placed into the dipping barrel;

2) orderly and densely placing a first layer of blank at the bottom of the material rack, wherein the first layer of blank does not exceed the edge of the bottom layer of the material rack;

3) placing 2-4 stainless steel gaskets on each blank according to the size of the blank, then placing upper-layer blanks, ensuring the stability of the upper-layer blanks according to the number and size of the gaskets, and sequentially stacking and loading the upper-layer blanks into the blanks according to the mode of each layer of blanks plus the gaskets;

4) hoisting the impregnation rack filled with the blank into an impregnation barrel, and loading the impregnation rack into a pressure impregnation furnace to start impregnation;

5) and discharging after the impregnation is finished, discharging after the blank is cooled, and shoveling off the stainless steel gasket on the blank by using a shovel blade, wherein the stainless steel gasket can be repeatedly used.

In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures 1-3 are described in detail. It is obvious that the described embodiments are only some, not all embodiments of the proposed solution. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The implementation example of the invention is as follows:

a liquid phase dipping device for preparing C/C composite material is provided, a material rack chassis is provided with holes, and stacked blanks are separated by stainless steel gaskets. The effective size of the dipping furnace is phi 800mm multiplied by 1200mm, the stainless steel material cylinder is phi 780mm multiplied by 1150mm, a stainless steel material frame with phi 760mm multiplied by 1120mm and a plurality of stainless steel gaskets with the thickness of 1.5mm are designed and processed.

1) Orderly and densely placing a first layer of blank at the bottom of the material rack, wherein the first layer of blank does not exceed the edge of the bottom layer of the material rack;

2) placing 2-4 stainless steel gaskets on each blank according to the size of the blank, then placing upper-layer blanks, ensuring the stability of the upper-layer blanks according to the number and size of the gaskets, and sequentially stacking and loading the upper-layer blanks into the blanks according to the mode of each layer of blanks plus the gaskets;

3) hoisting the impregnation rack filled with the blank into an impregnation barrel, and loading the impregnation rack into a pressure impregnation furnace to start impregnation;

4) and (4) discharging the blank after the dipping is finished, and shoveling the stainless steel gasket on the blank by using a shovel blade after the blank is cooled and discharged.

Claims (4)

1. The utility model provides a preparation C/C combined material liquid phase flooding's frock which characterized in that includes:

the dipping barrel is used for placing the stainless steel barrel in the pressure dipping furnace;

the dipping material frame consists of a chassis with holes, a stand column and a top lifting hook and is placed in a dipping barrel;

a spacer for spacing each layer of stock.

2. The tooling for preparing the C/C composite material by liquid phase impregnation according to claim 1, is characterized in that: the gasket has a size of (30-50) mmX (30-100) mmX (1-2) mm.

3. The tooling for preparing the C/C composite material by liquid phase impregnation according to claim 1, is characterized in that:

the tool and the gasket are made of stainless steel.

4. A furnace charging method by using a C/C composite material liquid phase impregnation tool is characterized by comprising the following steps:

1) orderly and densely placing a first layer of blank at the bottom of the material rack, wherein the first layer of blank does not exceed the edge of the bottom layer of the material rack;

2) placing 2-4 stainless steel gaskets on each blank according to the size of the blank, then placing upper-layer blanks, ensuring the stability of the upper-layer blanks according to the number and size of the gaskets, and sequentially stacking and loading the upper-layer blanks into the blanks according to the mode of each layer of blanks plus the gaskets;

3) hoisting the impregnation rack filled with the blank into an impregnation barrel, and loading the impregnation rack into a pressure impregnation furnace to start impregnation;

4) and discharging after the impregnation is finished, discharging after the blank is cooled, and shoveling off the stainless steel gasket on the blank by using a shovel blade, wherein the stainless steel gasket can be repeatedly used.

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