Usually the factory in the purchase of
Injection Molding Machine is based on the weight of their own products to choose the appropriate injection molding machine. But many people on some injection molding machine manufacturers to provide the theoretical injection volume, theoretical injection volume, the actual injection volume is not very understanding, now will be the calculation method of these data and how to choose the injection molding machine according to the plastic parts of the common sense problem.
Introduced as follows:
Theoretical injection volume and theoretical injection amount
The theoretical injection volume is calculated according to the design value, and the formula is V= π/4 Ds2*S ( Formula 1) V - on the injection volume cm3Ds-screw diameter cmS - injection stroke cm
The theoretical amount of injection is equal to the theoretical injection volume multiplied by the density of the plastic at room temperature.
G = VXRHO (Formula 2)
G - Theoretical gel ejection g
V - Theoretical injection volume cm3
Plastic density g / cm3 at room temperature
Based on the characteristics of polystyrene (ps) plastics, its density value is usually used as a standard for calculation: the density of ps at room temperature is 1.05 g / cm3. For example, the 160F machine in the company's product version has a theoretical injection volume of 307 cm3 and a theoretical injection volume of 307 × 1.05 = 322.4 g
