Study on Plasticization Performance of Micro Injection Molding Machine with Disc Screw

doi:10.19491/j.issn.1001-9278.2021.05.018

Abstract

Abstract:

The plasticizing process of a rotating disc screw in the disc-screw micro injection molding machine was simula-ted by using the COMSOL Multiphysics finite element simulation software. The phase change of polymer flow and the heat transfer in the cavity were analyzed during the rotation of the screw. The analysis and simulation results indicated that the heating temperature had greater impact on the plasticizing performance under the premise of the same screw structure， and however the rotate speed had a smaller impact on the plasticizing performance. Base on these simulation results， this paper provides a reference for the structural optimization of the disc screw.

Key words: finite element simulation, micro injection molding, plasticization, disc screw

CLC Number:

TQ320.66

KONG Xiaoya, ZHANG Xiang, ZHU Jianxiao, HOU Chuanyu, GUAN Guotao, YAN Zhenhao, LI Qian. Study on Plasticization Performance of Micro Injection Molding Machine with Disc Screw[J]. China Plastics, 2021, 35(5): 113-118.

Figures/Tables 10

Fig.1. The geometry of the moving disc

Fig.2. Finite element model

Fig.3. Meshing model

工艺参数	转速/r·s^-1	温度/℃
1	10	180
2	20	190
3	30	200
4	40	210
5	50	220
6	60	230
7	70	240
8	80	250

Tab.1. Process parameters

Fig.4. Fluid flow velocity

Fig.5. Fluid shear rate

Fig.6. Fluid pressure distribution

Fig.7. Fluid phase transition distribution

Fig.8. Effects of process parameters on phase transition, velocity and shear rate

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