Cone phenolic resin composites structural parts whole-blank precast-products lapping forming technique

A composite material and molding process technology, applied in the field of composite material processing, can solve the problems of irregular and uneven shrinkage of rubber sleeves, uneven thickness, waste of raw materials, etc. The effect of production costs

Active Publication Date: 2010-06-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the irregular shrinkage of the rubber sleeve and the unevenness of manual loading, the surface of the overall blank produced in this way is uneven and the thickness is extremely uneven. The product not only has the risk of material shortage, but also has a large local processing allowance, resulting in waste of raw materials. also reduces production efficiency

Method used

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  • Cone phenolic resin composites structural parts whole-blank precast-products lapping forming technique
  • Cone phenolic resin composites structural parts whole-blank precast-products lapping forming technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Processing flow such as figure 1 shown.

[0026] A product has a large end diameter of 900mm, a small end of 700mm, a height of 1200mm, a thickness of 10mm, a machining allowance of 10mm, and a product density of 1.65g / cm 3 , the lap width is 200mm, and the whole blank is divided into two pieces, based on which the flat pre-compression mold is designed. The cavity size of the flat pre-compression mold is 1620mm at the big end, 1300mm at the small end, 1200mm wide and 150mm deep. According to the prefabricated According to the formula s*(d+l)*g for calculating the loading amount of a piece, 58kg of phenolic premix is ​​used for each prefabricated piece; the flat pre-compression mold is installed on the hydraulic press, and the flat pre-compression mold and the integral molding female mold are simultaneously Preheat to 60°C; evenly load 58kg of phenolic premix into the flat pre-compression mold, close the mold with a hydraulic press, pressurize at 1MPa, keep warm for 15 ...

Embodiment 2

[0028] A product has a large end diameter of 1200mm, a small end of 1000mm, a height of 1600mm, a thickness of 12mm, a machining allowance of 10mm, and a product density of 1.65g / cm 3 , the overlapping width is 200mm, and the whole blank is divided into 4 pieces, based on which the flat pre-compression mold is designed. According to the formula s*(d+l)*g for the calculation of the loading amount of each piece, 62kg of phenolic premix is ​​used for each prefabricated piece; the flat pre-compression mold is installed on the hydraulic press, and the flat pre-compression mold and the integral molding female mold are simultaneously Preheat to 70°C; evenly load 62kg of phenolic premix into the flat pre-compression mold, close the mold with a hydraulic press, pressurize at 2MPa, keep warm for 20min, open the mold and take out the prefabricated part, apply force manually on the conical master The prefabricated part is bent into an arc-shaped prefabricated part and cooled naturally for...

Embodiment 3

[0030] A product has a large end diameter of 600mm, a small end of 500mm, a height of 600mm, a thickness of 10mm, a machining allowance of 10mm, and a product density of 1.65g / cm 3 , the lap joint width is 200mm, and the whole blank can be divided into 2 parts unevenly. Based on this, two flat-plate pre-compression molds are designed. The cavity size of the first flat-plate pre-compression model is 1100mm at the big end, 943mm at the small end, and 600mm wide. The depth is 150mm, the size of the second flat plate pre-compression model cavity is 1185mm at the big end, 1028mm at the small end, 600mm wide, and 150mm deep. Use 20kg of phenolic premix for the prefabricated part, and 22kg of phenolic premix for the second prefabricated part; install the first flat precompression mold on the hydraulic press, and preheat the flat precompression mold and integral molding female mold to 50 at the same time ℃; Evenly load 20kg of phenolic premix into the first flat pre-compression mold, ...

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Abstract

The invention relates to a related joint forming process of a conical metlbond composite material structure and an overall blank preformed unit. The shape of the conical metlbond composite material structure is unfolded and differentiated, and the related joint width of the preformed unit is taken as the basis of the size, thus a tablet prepressing mold can be designed and manufactured; the chargeamount of each preformed unit is calculated; metlbond premix compound is horizontally and evenly added in the preheated prepressing mold, a hydraulic press pressurizes on the preformed unit, demoulding is carried out after holding the temperature for 10-30 minutes; the preformed unit after demoulding is immediately bent into an arc preformed unit by a conical explorator; cooling is carried out for 15-30 minutes; the preformed unit is put in the preheated overall forming mold for related joint, the overall blank is obtained by sealing the preformed unit by a gum cover and pumping to be in vacuum. By adopting the process, one third of the metlbond premix compound can be saved in production, the production cost is greatly reduced; the original processing period of 4 days is reduced to 2.5 days, thus improving the production efficiency; the loading difficulty and labor intensity are lowered, the controllability of the process is improved, the thickness of the product is even and complete,and the stability of the product quality is greatly improved.

Description

technical field [0001] The invention relates to a prefabricated overlapping molding process of an integral blank of a conical phenolic composite material structural part, belonging to the field of composite material processing. Background technique [0002] With the development of phenolic composite material technology, integrally formed complex surface structural parts have become the trend of product design. The integrally formed structural parts can not only improve the integrity and reliability of products, but also simplify the production process and improve production efficiency. . [0003] Now the isostatic pressing technology is used to integrally form the cone-shaped phenolic composite structural parts. When the overall blank is produced, the material is vertically loaded in the female mold. After manual compaction, the rubber sleeve is used to seal the vacuum and pre-press to obtain the overall blank. Due to the irregular shrinkage of the rubber sleeve and the une...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/02B29C43/14B29C43/58B29C53/02B29K61/04
Inventor 丁仁兴赵建设于淼郑世平
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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