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In this case, it is even more important. If a temperature controller is present, then you can at least assume that the coolant temperature approximates the setpoint. If you do not have a temperature controller, then you can only guess the temperature of the water being supplied without a measurement.

If you do not have a mold temperature controller, then it is also important that you document the mold surface temperature after the mold stabilizes. When doing this, you should always provide a diagram of the actual location being measured.

-Andy

Essentially, materials such as magnesium are effectively alloyed to create a thixotropic material. This alloy can be shear heated like a polymer to create a semi-solid slurry which can be injection molded. The tonnage is approximately 1 ton per cm^2. This process does require specialized equipment and should not be done on a standard injection molding machine.

Like injection molding, the parts should have good design features such as draft angles and fillets. The final part has approximately 0.5% shrinkage.

-Andy

This is a true, but the strength and appearance of the weld line is often dependent on the ability of the two flow fronts to interact after meeting. When the flow fronts meet, the polymer near the mold surface will stop flowing and interacting faster when the mold surface temperature is lower. This can cause the weld line to freeze before the intersection of the two flow fronts makes contact with the mold surface, thus reducing the appearance.

-Andy