A forming method for preparing high-quality transparent parts based on photonic crystal high-elasticity method

Abstract

The invention belongs to the technical field of plastic machining forming and discloses a forming method for manufacturing a high-quality transparent piece based on a photonic crystal high-elastic state method. The forming method comprises the following steps that (1) materials are prepared; (2) machining conditions are obtained, specifically, the decomposition temperature of photonic crystals isobtained through thermogravimetry, and the glass-transition temperature and the viscous flow transition temperature of the materials are obtained through differential scanning calorimetry; (3) a mouldis prepared; (4) the materials are added in the mould; (5) heating is conducted, specifically, the photonic crystals are heated to enter into a high-elastic state, and heat preservation is conductedto guarantee that the photonic crystals are completely transformed into the high-elastic state; and (6) pressure maintaining and cooling are conducted, specifically, the pressure is increased to enable the photonic crystals to be combined mutually, then heating is stopped, the pressure is maintained, the photonic crystals are cooled with the mould to the indoor temperature, and accordingly the transparent piece is obtained. The macro orientation problem of the product due to the fact that molecular chains are distributed regularly because of shear flow and shrinkage of the materials is avoided, the product is in a uniform and regular periodic structure microcosmically, and the forming quality is good.

Description

technical field [0001] The invention belongs to the technical field of plastic processing and forming, and more specifically relates to a forming method for preparing high-quality transparent parts based on a photonic crystal hyperelastic method. Background technique [0002] The main component of plastic is resin, which is a high molecular compound polymerized by monomer through addition polymerization or polycondensation reaction. Most plastics have strong corrosion resistance, do not react with acid and alkali, low manufacturing cost, durable, waterproof, light weight, easy to be manufactured into different shapes, good insulators and other excellent properties, so they are widely used in daily life They can be seen everywhere in electronic product casings, furniture casings, tableware, and commodity packaging. [0003] There are various plastic forming methods. According to statistics, there are more than 30 kinds, including compression molding, extrusion molding, injec...

AI Technical Summary

Problems solved by technology

[0004] Plastic injection molding technology has developed relatively mature, widely used, and relatively high production efficiency, but there are still some problems, especially in the orientation of optically transparent products, due to the existence of birefringence, the problem of imaging is more prominent

The processing of high-transparency parts is as large as a fighter aircraft cabin cover and as small as a camera lens. The traditional processing technology uses a plate hot-pressing process, which has a large internal stress in the forming and is prone to micro-cracks in later processing. The new process adopts integral injection molding. Although subsequent processing can be avoided, due to the great shear force when the material flows in the cavity during the processing, the cooling process will also leave internal stress due to uneven cooling, which will lead to polymer materials Long chains produce regular orientation arrangements, making the parts anisotropic

In optical imaging instruments, the orientation of the workpiece can cause birefringence problems and image distortion problems, resulting in poor image quality

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