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Plastic hanger injection molding machine related introduction

Update:13-05-2021
Summary:

Plastic hanger manufacturers will definitely use plasti […]

Plastic hanger manufacturers will definitely use plastic hanger injection molding machines. So, what are the functions and principles?

1. The performance of the material. This design adopts PP plastic molding, PP (polypropylene) is non-toxic, low density, strength, rigidity, hardness and heat resistance are better than low pressure polyethylene, and can be used at about 100°C. It has good electrical properties and high-frequency insulation and is not affected by humidity, but it becomes brittle at low temperatures, not wear-resistant, and easy to age. Suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Common organic solvents such as acids and alkalis have little effect on it and can be used for food utensils.

2. Generally, the actual volume is 50% to 80% of the theoretical injection volume. 109700/140000=78.36%, which is reasonable.

Plastic hanger injection molding machine related introduction

2. Checking the injection pressure. It is recommended that the average pressure of the melt in the cavity is p=35Mpa for commonly used plastics, and the injection pressure of the injection machine is 126Mpa, that is, the injection pressure is greater than the cavity molding pressure, so the injection pressure meets the requirements. 3. Check the mold clamping force and calculate the cavity pressure. The injection pressure of PP is 68.7~117.7MPa, but the injection pressure of P type when the melt is injected into the mold cavity through the nozzle (due to the pressure loss and the increase in cross-sectional area) Large), only the maximum injection pressure of the injection machine is 0.25~0.5, take PNote=126MPa, R=0.35. Therefore, P type=R·P Note=126×0.35=44.1MPa The pressure on the parting surface that is on the movable template due to injection P type is F type=P type·S, but the actual parting surface The pressure received should be less than the rated clamping force F lock on the injection machine, otherwise it will cause overflow or forced mold opening due to insufficient clamping force, that is, F type <F lock F type = P type · S (S—plastic parts Total projected area, m2) S=S1+S2 (S1 is the projected area of ​​the plastic clothes hanger, S2 is the projected area of ​​the condensate)

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