Influence of Process Parameters on Filling and Feeding Capacity during High-Pressure Die-Casting Process

Round 1

Reviewer 1 Report

The article is elaborate, easy to read and understandable for the general public. The conclusions are clearly presented.

I have a few comments in the technical terminology:

According to NADCA, and a many of other associations and companies, I propose to adjust the terminology

• Moving half/Fixed half would be appropriate to modify to Ejector Die/Cover Die
• Over flow would be appropriate to modify to Overflow
• In-gate would be appropriate to modify to Gate

 

At the same time I have a few questions:

• H.T. coefficient between mold and casting (W/m2·K) was set at 4000. Isn't your value too low ??? The heat transfer between the two "metal" parts should naturally be higher
• Figure 6 is shown, but it is clear that with increasing piston speed in the first phase, the free surface of the melt forms waves. This phenomenon leads to increased capture of gases in the volume of the melt and subsequently to their transport to the volume of the casting. What was the delay time between the dosing of the chamber and the start of pressing? Is this time important in terms of trapping gases in the melt and creating waves in the first pressing phase?

Please explain these issues, or make notes in the article.

 

 

Author Response

Dear reviewer

Thank you very much for your careful and professional review of this article. We have carefully revised the manuscript according to your review comments. Please see the attachment for details.

Author Response File: Author Response.doc

Reviewer 2 Report

Very interesting study on HPDC

Lines 189-190:  "the solidification process of the whole part was inconsistent".  inconsistent is not an adequate description...

Line 194 there is a wrong dot

Line 322 there is a miss dot

Materials and methods, piston diameter is not given and not the length of the chamber.

Results

The filling capacity is very well explained and measured by the grids, but not shrinkage porosity and gas porosity should be explained in terms of the scale of Procast . On the other hand, there are no physical evidence of shrinkage porosity and gas porosity so some parts of the castings must be cut off in order to validate the model, of some samples as example.

 

 

Comments for author File: Comments.pdf

Author Response

Dear reviewer

Thank you very much for your careful and professional review of this article. We have carefully revised the manuscript according to your review comments. Please see the attachment for details.

Author Response File: Author Response.doc