Spray pipe expansion section and forming method thereof

A molding method and expansion section technology, applied in the direction of tubular objects, other household appliances, household appliances, etc., can solve the problems of high equipment requirements and high cost, and achieve the effect of low equipment requirements, low cost, and simple method

Pending Publication Date: 2021-05-18
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a nozzle expansion section and its forming method to solve the technical problem that the tradit

Method used

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  • Spray pipe expansion section and forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042]As an embodiment of the embodiment of the present invention, the obtained double material prefabricate comprising carbon cloth and fiber cloth, including,

[0043]The carbon cloth is layered along the type, and the inner layer is obtained;

[0044]In the inner outer outer fiber cloth, the fiber sewing is integrated with the fiber suture line, and the transition layer is obtained.

[0045]In the transition layer, the fiber cloth is covered with a connection layer;

[0046]The fiber cloth is covered with the connection layer, and the transition layer, the connection layer, and the connecting layer are sutured in one, and the pretreatment is performed, and the carbon cloth and fiber sewing are obtained. Double material prefabricates together.

[0047]During the above-described coating, a pressure of 0.1-1 MPa should be applied to cause the carbon cloth of the adjacent layer of the prefabricate, and the carbon cloth and the fiber cloth of the adjacent layer and the adjacent layer fiber cloth are...

Example Embodiment

[0055]Example 1

[0056]Example 1 provides a nozzle expansion segment and a molding method thereof, specifically as follows:

[0057]First, prefabricated: Preficit Preparation Steps: Adopt carbon cloth, high silicon oxide according to the design thickness requirements, in turn on the surface, inserted and puncture, suture, form a double material preform;

[0058]Second, the mold processing step: After cleaning the surface of the concave mode, spray a layer of PMR release agent, then heat insulation at 170 ° C;

[0059]Third, the prefabricated preheating step: When the prefabrication of steps one is placed in an oven heating apparatus, the time of holding 2 h at a temperature of 100 ° C;

[0060]Fourth, the mold initial dressing step: fill in the sealing rope on the sealing groove on the convex mode and is integrated with the mold bottom plate;

[0061]V. Prefabrication Set Steps: Set the prepared prefabricate to make the small end to the large end to the large end, and make the prefabricate on the s...

Example Embodiment

[0068]Example 2

[0069]Example 2 provides a nozzle expansion segment and a molding method thereof, specifically as follows:

[0070]First, prefabricated preparation:

[0071]Inner layer laying step: Top (material: wood) profile in the mold (material: wood) profile, the tape layer (or wound) direction is consistent with the direction of the mold axis; laying (or wrapping) There must be a certain lamination pressure (or winding tension) to the cloth layer in the process (the fiber volume fraction needs to be related);

[0072]The transition layer laying step: the high silicide glass fiber cloth that satisfies the thickness of the carbon layer surface of the carbon layer is satisfied, and the inner layer and the transition layer are sutured with the carbon fiber yarns, stitching: lock stitching, suture needle From: 3 * 3;

[0073]Connecting layer laying step: 3mm of outer fiber cloth in the outer surface of the transition layer, during the coating process, the quartz glass fiber yarn is required to...

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Abstract

The invention provides a spray pipe expansion section and a forming method thereof, and belongs to the technical field of composite material forming. The method comprises the following steps of: obtaining a double-layer material preform formed by sewing carbon cloth and fiber cloth together; placing the double-layer material preform in a mold, injecting glue, and performing curing treatment at the temperature of 50 to 170 DEG C for 6 to 10 hours; and demolding the preform subjected to curing treatmen, and obtaining the spray pipe expansion section. According to the forming method provided by the invention, high pressure does not need to act on a rubber sleeve on the outer side, so that the phenomena of layering, cracking, micro-cracks and the like which are easy to occur in the forming process of an inner-layer composite material are overcome, and the internal quality of a double-layer composite material product is greatly improved; and the method is simple, low in equipment requirement, low in cost, simple and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of composite material forming, and in particular relates to a nozzle expansion section and a forming method thereof. Background technique [0002] The shape of the expansion section of the nozzle of a subsystem of a rocket engine is a horn-shaped nozzle with a large diameter at one end and a small diameter at the other end. Gradient composite material, the traditional molding method of the composite material is to prepare phenolic prepreg cloth from carbon cloth and high silica cloth respectively, then wrap the carbon cloth impregnated with phenolic formaldehyde on the punch, and then wrap the high silica cloth impregnated with phenolic Wrapped on the outside of carbon cloth, and finally coated with high-silica cloth, placed in a hydraulic kettle, cured under high temperature, high pressure and vacuum, and finally machined to form, so as to achieve the purpose of anti-ablation of the inner layer and heat ins...

Claims

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Application Information

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IPC IPC(8): B29C70/42B29C70/54B29L23/00
CPCB29C70/42B29C70/54B29L2023/00
Inventor 李俊菊罗海涛张天胤
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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