Nanofluid-assisted rapid thermal cycle injection molding system and injection molding method

Abstract

The invention provides a nanofluid-assisted rapid heating cycle injection molding system. The nanofluid-assisted rapid heating cycle injection molding system comprises a high-temperature nanofluid generation and storage device, a low-temperature nanofluid storage tank, a nanofluid recycle tank, a high-pressure gas supply device, a gas booster pump, an injection mold and a mold temperature control unit. The invention further provides a nanofluid-assisted rapid heating cycle injection molding method realized through the system. Compared with the existing rapid heating cycle injection molding technology based on high-temperature oil, superheated water or steam heating and cooling water cooling of molds, the system and the method have the advantages that the new heat transfer enhancement working medium, namely nanofluid is adopted as the heating medium and the cooling medium of the mold, and therefore the heating efficiency and the cooling efficiency of the mold can be remarkably improved. In addition, the system has the advantages that the structure is simple, the material is saved, the consumption is lowered, the work flow is reasonable and the structure of the existing molds do not need to be transformed when the prior art is replaced, thereby being suitable for being widely applied and popularized in industrial production. The invention belongs to the technical field of rapid heating cycle injection molding of high polymer material.

Description

technical field [0001] The invention relates to a rapid thermal cycle injection molding system for polymer materials, in particular to a nanofluid assisted rapid thermal cycle injection molding system and an injection molding method. Background technique [0002] Plastic injection molding has the characteristics of high production efficiency, low cost, strong adaptability and product diversification. Injection molded products are widely used in the fields of information, automobiles, home appliances, aerospace and national defense. In recent years, plastic products are developing in the direction of high performance, high precision, low cost, lightweight and green, which makes the conventional injection molding process is facing increasingly severe challenges, and it is becoming more and more difficult to meet the requirements of the development of modern injection molding industry. To this end, in recent years, the industry has introduced a new injection molding technology ...

AI Technical Summary

Problems solved by technology

Generally, the media used for mold convection heating are usually high-temperature oil, superheated water and steam. Although they have many advantages, they still have the following deficiencies: (1) The thermal conductivity of oil and water is relatively low. Low, resulting in poor heat exchange between high-temperature oil and superheated water and the inner wall of the mold pipe, which is not conducive to rapid heating of the mold; (2) Due to the inherent physical properties of water and steam, the upper limit of the heating temperature rise is usually lower than 160 ℃, making it difficult to meet the high mold temperature requirements of engineering plastics (such as polycarbonate, nylon, etc.) or fiber-reinforced plastics with high heat distortion temperature for rapid thermal cycle injection molding; (3) The steam used to heat the mold is usually not recycled , leading to low energy utilization and high energy consumption

In recent years, some scholars have introduced water jet cooling technology into injection molds and developed mold water jet cooling technology. Although this technology can significantly improve the cooling efficiency of the mold, the structure of the mold is complex, and it is difficult to design and manufacture.

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