cooling channel guide lines

[FabioVilla]

Hello.

I need to design a cooling system (water channel) for a very simple mold (cylindrical geometry index).

do they exist on the internet of the notes/norms indicating the guidelines to follow? (advised size of channels, distance of the same from the edge in contact with the printed, etc.)

I begin by knowing the desired heat exchange coefficient, and I have already evaluated the channel section that could be suitable. I know therefore the general line the diameter that could have (or the area of the section if I choose rectangular channels) and then I would be able to draw the system of channels, but I wanted to compare the solution with possible rules/norms of "good project" not to do stupid things.

do you know how to recommend some sites?

Thank you.

fabio

 

[SHIREN]

Hello.

I need to design a cooling system (water channel) for a very simple mold (cylindrical geometry index).

do they exist on the internet of the notes/norms indicating the guidelines to follow? (advised size of channels, distance of the same from the edge in contact with the printed, etc.)

I begin by knowing the desired heat exchange coefficient, and I have already evaluated the channel section that could be suitable. I know therefore the general line the diameter that could have (or the area of the section if I choose rectangular channels) and then I would be able to draw the system of channels, but I wanted to compare the solution with possible rules/norms of "good project" not to do stupid things.

do you know how to recommend some sites?

Thank you.

fabio

Hi.
temperature of molten mass:
Starting from a low value to the growth of temperature, rapid reduction of both injection pressure and stress shear [EN] and this is attributable to the reduction of viscosity. when the temperature becomes very high the curves flatten, moreover you run the risk of degrading the material obtaining a piece of poor quality. the weight of the particular varies with the temperature of the molten mass. If the t is low we will have a strong pressure drop in the channels and it becomes difficult to make correct compensation, therefore you will have a reduced weight. to increase of t decreases pressure loss in channels, a more efficient compensation is implemented and increases the weight of the piece. if the t grows too much increases the withdrawal and during cooling you can have signs of resurface and weight reductions.
mold temperature: the increase in the temperature of the mould has a similar effect of the increase in the temperature of the molten mass. at the growth of the mold temperature I can operate with lower injection speed.http://www.edurete.org/pd/sele_art.asp?ida=2538