Composite material connecting skirt forming method and mold and inner rubber core mold forming mold

A composite material and molding method technology, which is applied in the field of molds and their rubber inner core mold forming molds, and the molding method of composite material connecting skirts, can solve the problem that the total weight and specific impulse of the engine casing have great influence, and the surface finish of the product cannot be guaranteed. , the inability to form composite material connecting skirts, etc., to achieve good quality consistency, improve product structure efficiency, and solve the problem that the degree of squeegee is difficult to control.

Active Publication Date: 2014-07-09
湖北三江航天江北机械工程有限公司
View PDF3 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the connecting skirt of composite materials is usually formed by the "prepreg lay-up + winding" molding method. This molding method exposes the following problems in the production process: 1) There is only one rigid male mold in the molding process, and the outer surface of the product is made of The fiber yarn is wound and pressed, and sometimes there are strangle marks, protrusions, and depressions, etc., which cannot guarantee the smoothness of the outer surface of the product, and it is difficult to guarantee the overall size of the product; 2) The resin content is controlled by manual scraping, which is

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite material connecting skirt forming method and mold and inner rubber core mold forming mold
  • Composite material connecting skirt forming method and mold and inner rubber core mold forming mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The size and performance parameters of the composite material connecting skirt for the motor casing prepared in this embodiment are as follows in Table 1:

[0035] Table 1

[0036] serial number

[0037] The molding method of the composite material connecting skirt comprises the following steps:

[0038] 1) Making a forming mold: making an outer mold, an inner mold, and a rubber inner core mold. The shape is matched, the shape of the inner mold is matched with the inner shape of the rubber inner mandrel; then a layer of release agent is evenly applied on the outer wall of the inner mold, and the release agent is silicone grease or PMR-70. The rubber inner core mold is set on the outer wall of the inner mold;

[0039] Among them, the process of forming the rubber inner mandrel by using the rubber inner mandrel molding die is as follows:

[0040] a. Preparation of rubber glue: use R10301 rubber, prepare 5kg of rubber glue according to the mass ratio of rubber...

Embodiment 2

[0053] The size and performance parameters of the composite material connecting skirt for the engine case prepared in this embodiment are as follows in Table 3:

[0054] table 3

[0055] serial number

[0056] The molding method of the composite material connecting skirt comprises the following steps:

[0057] 1) Making a forming mold: making an outer mold, an inner mold, and a rubber inner core mold. Shape matching, the shape of the inner mold matches the inner shape of the rubber inner mandrel; then apply a layer of release agent evenly on the outer wall of the inner mold, and set the rubber inner mandrel on the inner mold outer wall;

[0058] Among them, the process of forming the rubber inner mandrel by using the rubber inner mandrel molding die is as follows:

[0059] a. Preparation of rubber glue: use R10301 rubber, prepare 5kg of rubber glue according to the mass ratio of rubber emulsion: vulcanizing agent = 95%: 5%, stir evenly, put the rubber glue into a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
The inside diameter ofaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite material containing skirt forming method and mold and an inner rubber core mold forming mold. The method comprises the following steps: (1) manufacturing the forming mold, namely manufacturing an outer mold, an inner mold and the inner rubber core mold and sheathing the inner rubber core mold on the outer wall of the inner mold; (2) laying up; (3) preheating and vacuumizing the forming mold; (4) carrying out resin pretreatment; (5) injecting glue and solidifying, namely solidifying resin after glue injection, wherein the inner rubber core mold is expanded along with the increase of temperature to uniformly pressing a preform and enable the resin to fully infiltrate the preform; and (6) demolding and trimming. The forming mold structure adopts the inner rubber core mold; silicone rubber is adopted and a resin transfer molding (RTM) process is assisted to form the composite material containing skirt, and a double-sided mold is adopted, so that a product has the advantages of stable dimension, good quality consistence, controllable fiber and resin contents and the like; measures such as co-solidification and the adoption of the expandable core mold are adopted to reduce the porosity, increase the volume content of the fibers of the product and improve the mechanical property.

Description

technical field [0001] The invention relates to the molding technology of solid rocket motor shells, in particular to a molding method of a composite material connecting skirt, a mold and a rubber inner core mold molding mold thereof. Background technique [0002] The connecting skirt of the solid rocket motor casing is an integral extension of the casing, which is used to realize the connection between the missile stages or with other components. The connecting skirt needs to withstand various loads such as axial pressure, bending moment, shear, and internal pressure. The force situation is more complicated. How to simplify the molding process and improve its performance without increasing the weight of the connecting skirt is crucial to the improvement of the performance of the entire engine casing. [0003] At present, the connecting skirt of composite materials is usually formed by the "prepreg lay-up + winding" molding method. This molding method exposes the following p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B29C70/36B29C70/34B29C70/54B29C33/40
CPCB29C33/00B29C33/3842B29C70/342B29C70/36
Inventor 张国喜邓德凤黄泽勇曾甜甜高李帅霍文静谭云水魏虹姚桂平
Owner 湖北三江航天江北机械工程有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap