How to use hot runner system for molding parts with glass fiber


In order to improve the mechanical properties of rigidity, strength and also for surface hardness. A wide range of polymers are now produced in glass-fiber (varieties %), including PA, LCP, etc. On the other hand, it was found that increasing the glass-fiber also increase the complicate of surfaces wear, erosion, and gate frozen problem. It may damage the mold components and hot runner system. Typically Glass fiber grades are not recommended for hot runner applications. But hot runner systems can provide an array of benefits, including reduced material use, faster cycles, and overall better part quality.


Let Amold help you maximize the material properties of your Glass Fiber application.

Ann Tong company, brand with Amold hot runner system, has more than 29-years experiences in the hot runner field and its performance is highly recognized in this area. It provides customer-oriented and all-around services to make sure that its customer will have a highly stable production.

Ann Tong Co. Established in 1989, is a pragmatic, focused, professional and innovation oriented hot runner company. For years, it has been granted various patents and has won a number of awards as follows : Taiwan excellence Award, Innovation Research award, National Invention and Creation Award, Excellent enterprise of New Taipei City, etc.

Ann Tong also launched “Hot Runner Hospital” program providing all-round consulting service to assist our customers solving the hot runner issues.

The mission statement is “When customers succeed, Ann Tong succeeds."


As following is a case study :

 •  Mechanical part (weight/part) : 2 g/pc.

 •  Material : PA66 + 40% glass fiber.

 •  Cavities : 4 cavities / mold.

 •  3-plate mold : runner 15.6 g/shot. (24 second/cycle)

 •  Hot runner mold : no waste runner. (16 second/cycle)

-->Productivity from 14,400 (pcs/day) of 3-plate mold to 21,600 (pcs/day) by hot runner mold. Saving in material 15.6 g per mold, and then it can save 56.16 Kg per day, and it can save 7.5 (US$/KG) * 56.16 (KG) = 421.2 US$ per day.