How to buy cold chamber die casting machine ?

The selection of die casting machine is usually based on the clamping force, injection quantity and casting area.

1、 Determine the clamping force of alloy die casting machine

The clamping force is the first parameter to be determined when selecting the die casting machine. The function of mold locking force is mainly to overcome the mold expansion force in the mold cavity, lock the parting surface of the mold, prevent liquid metal splashing and ensure the dimensional accuracy of the casting. The die locking force of the automatic high precision die casting machine is calculated as follows:

F=k × p × s

F --- calculate clamping force

K --- safety factor

P --- injection specific pressure

S -- projected area

The safety factor K is related to the complexity of the casting and the die casting process. It is generally taken as 1-1.3. For thin-walled complex castings, the parting surface of the die is greatly impacted due to the high injection speed, injection specific pressure and die temperature. Therefore, K should be taken as the larger value, and vice versa.

II. Determine the injection quantity of the machine

Injection quantity is an important parameter of intelligent die casting machine. It is the most permanent parameter when selecting the die casting machine, expressed in kilograms.

Select a die casting machine with sufficient injection quantity - a die casting machine with injection quantity just equal to the blank weight of die casting parts shall not be selected. The usual choice is that the weight of die-casting blank should account for 25% - 85% of the injection volume.

III. determine the projected area of parts

The projection area is an important parameter for die casting model selection. The projection area mentioned here is not only the area of parts, but also the area of garbage bin and nozzle. The area estimation is generally obtained by dividing the clamping force by the injection specific pressure during die casting.

For the existing beer pieces, the calculation of casting area should be divided into small regular shapes.

(1) calculation of s of circle area with diameter D: S= Л d2/4

(2) calculation of square area s with side length a: S = A2

(3) calculation of rectangular area s with length a and width B: S = ab

(4) calculation of trapezoidal area s with upper bottom a, lower bottom B and height H: S = (a + b) H / 2