Abstract

Beyond simply identifying   shrinkage   porosity   and filling   problems,   numerical  tools  have   been   further developed  to  predict  stresses,  microstructures,  defects and   to   model   specific   processes   that   can   be   used effectively   by   the   foundry   engineer   early   in   the manufacturing process to save significant time and cost. More specifically this paper will address the following topics:
•Stress and deformation - what is the final shape of
the cast component? What about fatigue life of the die?   Can   heat   transfer   variation   due   to   gap formation between the casting and the die be taken into account? Can hot tears defects be predicted?
•Micro  and  gas  porosity  -  what  about  the  integrity
of   the   part?   Can  porosity  be  compensated   by graphite   expansion?   What   about  the  initial  gas content in the liquid?
•As-cast mechanical properties-can local
mechanical  properties  be  predicted  such  as  yield strength and hardness?

Zhejiang Sol-Millennium Plastic Mould Co. Ltd. is the one of the earliest specialist manufacturer of disposable syringes moulds with two-parts and three-parts to successfully develop moulds for the Safety and Auto-disable syringe and the multi-functional transparent master batch. The top producer of syringe moulds within China, our company is the source for over 60% of all syringe moulds and subsidiary moulds for other related equipment (e.g. infusion set) used by manufacturers in China. We have gained a reputation among our customers for our advanced designs, high quality and competitive prices, and have had success in both the domestic and foreign markets. Since being authorized to export on October 2002, our products have been exported to countries such as Australia, the United States, Spain, Russia, Poland, India, South Korea, Egypt and the Middle East.

          With over twenty years in the field, our company has slowly built up a team of highly skilled professionals who possess the necessary background and experience to carry out long term projects in designing and processing moulds to completion. The company also possesses a whole range of facilities to back up our personnel’s skill and experience, such as the CNC machine centre, Mill-turning centre, Sodick low speed wire-cut EDMs, carving CNC, Mirror pulser, coordinate boring machine, coordinate milling machine, and the CMM.

          Our company currently holds around thirty mould patents, including various safety syringe moulds (also known as the retractable hypodermic disposable syringe), semi-hot runner moulds for syringe barrels, and the joined mould for the plunger. In the area of quality management, we prefer assembly lines with one manager regulating the entire operation, increasing the durability of the mould and allowing for an easy interchange of mould parts. Presently, the annual output of our company rates at over 300 sets.

We supply Plunger mould,Gasket mould, Syringe barrel mould, Cap mouldHub mould, Insulin mould, Two-parts plunger mould, Luer-lock barrel mould with screw eject, Semi-hot runner mould, Joined plunger mould, Other Mould, Hot runner mould.