- Requirements for die runner on cold chamber horizontal die casting machine

Time:

2023-04-20

① The size of the inner diameter of the pressure chamber should be selected according to the required specific pressure and the fullness of the pressure chamber. The inner diameter is different from the axis, which will cause the problem of punch stuck or serious wear, and the wall thickness of the sprue sleeve should not be too thin. The length of the sprue sleeve should generally be less than the delivery stroke of the injection punch so that the paint can escape from the pressure chamber.

② The inner hole of the pressure chamber and the sprue sleeve should be finely ground after heat treatment, and then ground along the axial direction, and the surface roughness should be less than or equal to Ra0.2μm.

③ The diverter and the concave cavity forming the paint, its concave depth is equal to the depth of the runner, its diameter matches the inner diameter of the sprue sleeve, and there is a 5° slope along the demoulding direction. When the coating lead-in sprue is used, the fullness of the pressure chamber can be increased because the volume of the effective length of the pressure chamber is shortened.

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