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Phenolic resin casting plate preparation method

A technology of phenolic resin and casting body, which is applied in the direction of flat products, household utensils, and other household utensils. It can solve the problems of difficult preparation, only focus on vacuuming time, and difficult molding, etc., and achieve the effect of easy molding and simple steps.

Active Publication Date: 2012-01-18
HONGYANG MACHINERY FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there are many solvents in the phenolic resin, during the heating and curing molding process, the solvent volatilizes, and the cast body contains a large number of bubbles, making it difficult to mold
Ordinary methods for preparing resin castings only pay attention to the time of vacuuming, but pay less attention to the effect of vacuuming, and it is still difficult to prepare smooth and bubble-free resin castings

Method used

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  • Phenolic resin casting plate preparation method
  • Phenolic resin casting plate preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , before preparing the phenolic resin casting body, prepare the mold: clean the flat casting mold 1 (inner cavity size is 300mm×150mm×100mm) and the briquette 2 (outline size is 297mm×147mm×10mm), spray and remove Ready to use after molding agent;

[0026] one. Vacuuming step: Weigh 550g (solid content: 60%) of phenolic resin, pour it into the flat casting mold 1, then put the flat casting mold 1 into a vacuum oven at 50°C, and perform the following operations on the flat casting Mold vacuuming;

[0027] a. When the phenolic resin is pumped until it is about to overflow the flat casting body mold 1, stop vacuuming, but do not release the pressure; after 2 minutes, when the vacuum degree drops, continue to repeat the "vacuumization - stop vacuuming" 6 times (No pressure release)" operation; until the vacuum value drops to 4.0KPa, stop vacuuming, and release the pressure to normal pressure;

[0028] b. Repeat operation a once;

[0029] c. Va...

Embodiment 2

[0034] refer to figure 1 , Before preparing the phenolic resin cast body, prepare the mold: clean the flat plate cast body mold 1 (the inner cavity size is 300mm×150mm×100mm) and the briquette 2 (the outer dimension is 297mm×147mm×10mm), and spray After the release agent is used;

[0035] one. Vacuuming step: Weigh 550g (solid content: 60%) of phenolic resin, pour it into the flat casting mold 1, then put the flat casting mold 1 into a vacuum oven at 60°C, and perform the following operations on the flat casting Mold 1 is vacuumed;

[0036] a. When the phenolic resin is pumped until it is about to overflow the flat casting body mold 1, stop vacuuming, but do not release the pressure; after 5 minutes, when the vacuum degree drops, continue to repeat "vacuumizing - stop vacuuming" 10 times (No pressure release)" operation; until the vacuum value drops to 1.6KPa, stop vacuuming, and release the pressure to normal pressure;

[0037] b. Repeat operation a once;

[0038] ...

Embodiment 3

[0043] Before preparing the phenolic resin cast body, prepare the mold: clean the flat cast body mold 1 (inner cavity size 300mm×150mm×100mm) and briquetting block 2 (outer dimension 297mm×147mm×10mm), spray and demould Ready to use after dose;

[0044] one. Vacuuming step: Weigh 550g (solid content: 60%) of phenolic resin, pour it into the flat casting mold 1, then put the flat casting mold 1 into a vacuum oven at 55°C, and perform the following operations on the flat casting Mold 1 is vacuumed;

[0045] a. When the phenolic resin is pumped until it is about to overflow the flat casting body mold 1, stop vacuuming, but do not release the pressure; after 3.5 minutes, when the vacuum degree drops, continue to repeat the "vacuumization - stop pumping" 10 times Vacuum (no pressure release)" operation; until the vacuum value drops to 2.8KPa, stop vacuuming and release the pressure to normal pressure;

[0046] b. Repeat operation a once;

[0047] c. Vacuum until the res...

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Abstract

The invention discloses a phenolic resin casting plate preparation method, and belongs to the technical field of material molding. The method comprises the following three steps: a vacuum pumping step, a phenolic resin solidification step, and a demoulding step. The preparation method can prepare a smooth, bubble-free, easily-molded phenolic resin casting.

Description

technical field [0001] The invention belongs to the technical field of material molding, and in particular relates to a method for preparing a flat plate of a phenolic resin cast body. Background technique [0002] Phenolic resin has good ablation resistance and low price, and the composite material based on phenolic resin is widely used in the outer heat-proof layer in the aerospace field. The performance of phenolic resin determines its application range, but the preparation of its cast body has always been a difficult problem in the industry. Because there are many solvents in the phenolic resin, during the heating and curing molding process, the solvent volatilizes, and the cast body contains a large number of bubbles, making it difficult to mold. Ordinary methods for preparing cast resins only pay attention to the time of vacuuming, but pay less attention to the effect of vacuuming, and it is still difficult to prepare a smooth, bubble-free resin cast. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/02B29C39/44B29K61/04B29L7/00
Inventor 李俊菊崔西峰李金云
Owner HONGYANG MACHINERY FACTORY
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