Insufficient energy storage pressure in hot chamber die casting machine

How does hot chamber die casting work?

At this point the plunger travels further downward, forcing the molten metal into the die. The pressure exerted on the liquid metal to fill the die in hot chamber die casting manufacture usually varies from about 700psi to 5000psi (5MPa to 35 MPa). The pressure is held long enough for the casting to solidify.

What alloys are used in hot chamber die casting?

For this reason, usually only lower melting point alloys of lead, tin, and zinc are used to manufacture metal castings with the hot chamber die casting process. This page covers the set-up, process, technique, and application of industrial hot chamber die casting manufacture.

What are the advantages and disadvantages of hot chamber die casting?

Hot chamber die casting has the advantage of a very high rate of productivity. During industrial manufacture by this process one of the disadvantages is that the setup requires that critical parts of the mechanical apparatus, (such as the plunger), must be continuously submersed in molten material.

What is cold chamber die casting?

Cold Chamber Die Casting is the process of using a ladle to transport the molten metal from the holding furnace into the unheated shot chamber or injection cylinder. This metal is then shot into the die by using a hydraulic piston.

Why is pressure die casting important?

Pressure die casting is primarily affected by the process parameters such as solidification time, molten temperature, Filling time, injection pressure and plunger velocity. It is therefore essential that the optimum casting technique with minimum defects be adopted to reduce the manufacturing cost of die casting component during mass production.

How to solve defects in die casting production?

Since every defect may be caused by various factors, to solve defects in die casting production, you are strongly recommended to follow ‘easy things first’ principle as below: Clean up parting surface, die cavity, ejection pins—improve the quality of mold release agent, improve spraying process—increase clamping force, increase molten metal amount.