GIF smart molding 100px

LATEST ISSUE
Tags
Shows
23. - 26. April 2024
Chinaplas
Shanghai, China
06. - 10. May 2024
NPE
Orlando, USA
15. - 19. October 2024
Fakuma
Friedrichshafen, Germany
Have some relevant information to share? Send a message to info@smart-molding.com — we are always happy to discuss!

CPS24 ICL SmartMolding 368x90px EN

SmartMoldingBanner A2 768x90 MarchApril min

Логотип сайта
Long fiber injection molding

Long fiber injection molding

Articles

People are paying more attention to the issue of lightweight and trend, to satisfy the more secure, energy-saving, environmentally-friendly and comfortable demands. Carbon fiber is the material having the advantages of high strength and lightweight. At present, the use of carbon fiber cloth has become gradually mature and marketable, but its molding is difficult, and the labor cost for process is high. Therefore, the process of long fiber injection molding has become the mainstream and it can produce the complicated components and improve the structural strength.

111

Photo 1- Diagram for the relationship between fiber length and stiffness, strength and toughness

At present, the process of fiber application injection molding includes the combination of short fiber and resin SFT, combination of long fiber and resin aggregate LFT-G as well as the combination of continuous long fiber and resin LFT-D, FCS and LFT-D (Long Fiber Thermoplastic Direct) application injection molding. The finished product of fiber with the fiber length of more than 12 mm is tested in the target test. It is observed from photo 1 that short fiber (0.1~1 mm) can only sustain the structure stiffness of the finished product; when the fiber length is increased (10 mm~50 mm), it can not only sustain the structure stiffness but also improve the strength of materials; the continuous fiber (more than 50 mm) can improve the toughness of finished product and FCS target can improve the structure stiffness of the finished product as well as the strength of materials.

The unit equipment (see photo 2) required by long fiber application injection molding has the special barrel, so it is necessary to match the following equipment to realize long fiber injection molding:

112

Photo 2- Diagram for the framework of long fiber molding injection units

(1) VENT barrel: VENT barrel is the free-drying molding barrel and characteristic of this barrel is that it can mold the undried plastic raw material; the special design of barrel can exhaust the steam and gas in the plastic raw material and meanwhile the continuous fiber is input through the exhaust vent.

(2) HUNGRY FEEDER: the exhaust vent is designed in the middle of the VENT barrel. If a large amount of plastics enters through the feeding hole, it will cause the plastics to discharge from the exhaust vent, so it is necessary to install HUNGRY FEEDER to control the feeding.

(3) FIBER ROVING: different from the short fiber molding, the long fiber application injection molding needs to use the input of the continuous fiber.

113

Photo 3- Flow chart for the test of long fiber application injection molding

According to the test result, the fiber length has reached the target length of 12 mm set by FCS. The carbon fiber injection molding mainly focuses on energy and lightweight industry, thus, this technology will be introduced to the clients related to carbonfiber application industry, to help them solve the difficulty in long fiber injection process, so as to improve the product value of long fiber injection molding.

Our website makes use of cookies to ensure we give you the best experience on our website.
By continuing browsing on our website you give your consent to our use of cookies.