Creating an active 3d mold (discussion of theoretical possibility)

Good day.

I want to discuss with you the possibility of creating an active 3D mold.
I apologize in advance if these devices already exist, but I have not heard of such.

The idea is to create a programmable 3D mold, that is, something like a 3D printer, just for casting. That will allow you to use a wide range of consumables.


(Image conditional, only for understanding the general idea)

The casting part of the device will be a box in the walls of which rows of needles will be placed in rows, which can be immersed in this box at different depths (from wall to wall). The end of the needles inside the box is a wall of a linear shape.
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1. The first step is to create a mold. that is, the reverse formation of the model, say in the Autodesk inventor
2. Next, the cutting of the shape of the model into layers, the lower the profile of the layer, the better the cast product will come out. (I used 123D Make as an example)



(Below is the primary form for the template, a primitive mushroom. I am not an artist)



3. Breakdown of each layer to the depth for the entrance of the spokes (forming the model wall). The dotted line indicates the problematic place for this type of form construction.

The inside view of the wall should look something like this, only the width of such a spoke should be no more than a couple of millimeters.

4. Further it is possible to position the mold for air pressing inside (the balloon inflating fills the entire volume of the template), which slightly reduces the unevenness of the separation into layers. Or the addition inside the form of a liquid material, which during the rotation of the form will evenly solidify on the walls of the form. (Wax, Plastic)
5. The output of the spokes in the initial position, the excavation of the finished model.

Advantages and disadvantages:

The main disadvantage is the inability to build 2-3 complex internal forms on a single layer due to the intersection of the spokes trajectories. Square cast surface.

The advantages include a wide range of materials for casting (Wax, Cement, Plastic, Glass, Metal). The shape is changing and does not require the constant creation of templates for casting from other materials.

It should turn out to be a good analogue of 3D printing, for objects with low resolution and simple form. (Example: landscape models, vases, Christmas decorations, etc.)

PS The problem of the internal form in the form can be solved by creating links with each other along all the axes of the cells. (As an option)