Sintered model resin infiltration method and vacuum infiltration device

A vacuum infiltration and resin technology, which is applied in processing and manufacturing, solid material additive processing, manufacturing auxiliary devices, etc., can solve problems such as unsatisfactory processing effect, and achieve the effect of easy automatic promotion, excellent mechanical properties, and smooth surface.

Inactive Publication Date: 2018-02-02
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the unsatisfactory post-treatment effect of the existing polystyrene sintering model, the

Method used

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  • Sintered model resin infiltration method and vacuum infiltration device
  • Sintered model resin infiltration method and vacuum infiltration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment relates to a vacuum impregnation equipment, such as figure 1 As shown, it includes a tank body 4, a cover body 9 and a material rack 5, the cover body 9 covers the mouth of the tank body 4, the material rack 5 is arranged in the tank body 4, and the side of the tank body 4 is provided with a vacuum interface 2 , the compressed air interface 3 and the impregnating agent interface 6, the bottom of the tank body 4 is provided with a pressure relief valve interface 14, the inner side of the impregnating agent interface 6 is connected with an impregnating agent hose 7, and one end of the impregnating agent hose 7 is set on the top of shelf 5.

[0030] The lid body 9 is tightly closed with the tank body 4 through the locking cylinder 8 .

[0031] The top of the cover body 9 is provided with a pressure sensor 10 , a safety valve port 11 , a pressure gauge 13 and an observation window 12 .

[0032] The upper outer side of the tank body 4 is provided with a tan...

Embodiment 2

[0034] This embodiment relates to a method for impregnating using the vacuum impregnation equipment of Embodiment 1, which includes the following steps:

[0035] 1. The polystyrene model is formed by laser sintering 3D printing process, and the dust on the surface of the model is cleaned with a special blower;

[0036] 2. Calculate the amount of impregnating agent required according to the volume of the tank and the size of the polystyrene model, mix the epoxy resin, amine curing agent and reactive diluent at a ratio of 1:0.5:0.3, and then put it on the booster electric mixer Stir evenly to prepare a sufficient amount of post-treatment agent for impregnation;

[0037] 3. Check whether the control valves and air source pressure of the impregnation equipment are normal, and whether the interfaces are unobstructed, then put the polystyrene model that has removed the surface dust on the material rack, cover the pressure tank cover, and start the locking cylinder to lock the tank ...

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Abstract

The invention provides a polystyrene sintered model resin infiltration method and a production device on the basis of vacuum filling and pressure curing technological principles and provides a novel method aiming at the problem of the poor effect of aftertreatment in an existing coating mode. The polystyrene sintered model resin infiltration method comprises the specific steps that a polystyrene model which is sintered by a laser is placed in a sealed cavity, air in the cavity is pumped, a vacuum environment with the absolute pressure smaller than 40 KPa is established, and an infiltration agent is injected to enable the model to make contact with the infiltration agent sufficiently; and the pressure in the sealed cavity is rapidly increased to be larger than 150 KPa, the proper time is kept to enable the infiltration agent to enter the model under the pressure effect, and after a solidification reaction, the quality and mechanical performance of the surface of the model are improved.

Description

technical field [0001] The invention relates to a sintering model resin impregnation method and vacuum impregnation equipment, belonging to the technical field of new material processing methods. Background technique [0002] Polystyrene is a thermoplastic, which can be melted and bonded after being heated, and can be solidified and formed after cooling. The moisture absorption rate of polystyrene material is only 0.05%, and the shrinkage rate is also relatively small. The powder material has a low melting point, small sintering deformation, good formability, and can be reused. After the powder material is modified, it can be used as an option Powder materials for laser sintering. The sintered parts can be used as functional parts after being impregnated with resin to further improve their strength; after being dipped in wax, they can also be used as wax models for precision casting. Due to its low cost, it is currently the most widely used selective powder laser sintering...

Claims

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Application Information

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IPC IPC(8): B29C64/153B29C64/307B33Y40/00
CPCB33Y40/00
Inventor 邹文兵柯林达张旭亮李中权陈加运李利平叶顺坚王林吴晓松游辉辉
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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