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How are carbon fiber molds made? You can learn about the several molding processes of carbon fiber

Join Date: 2021-07-28

Carbon fiber, also known as graphite fiber, carbon graphite, referred to as CF (Carbon Fiber). Carbon fiber refers to a high-strength and high-modulus fiber with a carbon content of more than 90%. It is the most high-temperature resistant of all chemical fibers. It is made of acrylic and viscose fibers as raw materials and is formed by high-temperature oxidation and carbonization. It is used in aerospace, automotive , Public infrastructure, medical and industrial equipment and other fields have played an extremely important role.

Carbon fiber composite materials need to be processed by a molding process from the initial prepreg to the final part molding. With the continuous development of carbon fiber technology, even if the carbon fiber composite material molding process is constantly improving, the various molding processes of carbon fiber composite materials do not exist in a way that is updated and eliminated, but multiple processes coexist. This situation has become a reality. The best way to deal with different conditions and situations.

In this article, we will introduce you to several of the most commonly used carbon fiber molding processes.

 

Injection molding process

This process is a type of low-pressure molding in the hand lay-up process. The chopped fiber and resin are mixed with a spray gun, and compressed air is sprayed on the mold. After reaching a predetermined thickness, it is manually pressed with a rubber roller to solidify the shape. Although a semi-manual and semi-mechanized molding process was created to improve the pure manual molding, work efficiency has been improved to a certain extent, but it is still not enough for mass production, so it can only be used to manufacture car bodies, hulls, and hulls. Transition layer for bathtubs, etc.

 

Liquid molding process

Place the carbon fiber prepreg between the upper and lower molds. After closing the molds, place the molds on the hydraulic forming table. After a certain period of high temperature and high pressure cure the resin, remove the carbon fiber products. Compression molding technology has the advantages of high efficiency, high dimensional accuracy, and low environmental impact. It is suitable for batching and high-strength composite parts molding. However, this kind of molding process has a large investment in the early stage, and the mold manufacturing is complicated and restricted by the size of the press.

 

Compression molding process

Place the carbon fiber prepreg between the upper and lower molds. After closing the molds, place the molds on the hydraulic forming table. After a certain period of high temperature and high pressure cure the resin, remove the carbon fiber products. Compression molding technology has the advantages of high efficiency, high dimensional accuracy, and low environmental impact. It is suitable for batching and high-strength composite parts molding. However, this kind of molding process has a large investment in the early stage, and the mold manufacturing is complicated and restricted by the size of the press.

 

MDC Mold has been mainly engaged in the design and manufacture of various composite material hot press molds since its establishment. So far, the molds manufactured by the company have fully met the quality requirements of the world's top 500 companies, and the technology has been able to synchronize with the international. In recent years, the company has also been committed to the design and development of lightweight composite molds such as GMT and carbon fiber, and has continuously developed its own technology through cooperation with internationally renowned manufacturers and exchanges of design and development concepts.

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