Methods of manufacturing layered three-dimensional forms
New methods and systems for manufacturing a three-dimensional form, comprising steps of providing a plurality of particulates; contacting the particulates with an activation agent; contacting particulates having the activation agent with a binder material that is activatable by the activation agent; at least partially hardening the binder for forming a layer of the three-dimensional form; and repeating these steps to form the remainder of the three-dimensional form. Following sequential application of all required layers and binder material to make the form, the unbound particles are appropriately removed (and optionally re-used), to result in the desired three-dimensional form. The invention also contemplates a novel method for preparing a form, where unbound particulates free of binder material are re-claimed.
1. A method for manufacturing a three-dimensional form, comprising:
a) providing a plurality of particulates in the absence of a binder material;
b) coating the surface of the particulates with an activation agent so that the diameter of the particulates is enlarged;
c) spreading a layer of coated particulates in the absence of any binder material;
d) selectively dispensing a fluidic unreacted organic binder material that is activated by the activation agent with a drop-on-demand dispenser onto a pre-selected portion of the particulates having the activation agent, the binder material being contacted with particles no earlier than when the binder material first contacts the activation agent;
e) hardening the binder material for forming a layer of the three-dimensional form that defines a matrix having the particulates firmly held within it; and
f) then repeating the steps (a)-(e) to form a remainder of the three-dimensional form.
2. The method of claim 1 wherein the particulates are polymeric and the resulting three dimensional form includes a mineral filler.
3. The method of claim 1 wherein the particulates are polymeric and the resulting three dimensional form includes a (meth)acrylate.
4. The method of claim 1 wherein the particulates are polymeric and the resulting three dimensional form includes a (meth)acrylic acid.
5. The method of claim 1 wherein the resulting three dimensional form includes a dye.
6. The method of claim 1 further comprising applying ultraviolet radiation to assist the hardening.
7. The method of claim 1 , wherein the activation agent includes an aromatic amine.
8. The method of claim 1 , further comprising a step of re-claiming particulates that are free of the binder material.
9. The method of claim 7 , further comprising a step of re-claiming particulates that are free of the binder material.
10. The method of claim 2 wherein the particulates are polymeric and the resulting three dimensional form includes a (meth)acrylate.
11. The method of claim 2 wherein the particulates are polymeric and the resulting three dimensional form includes a (meth)acrylic acid.
12. The method of claim 10 , wherein the activation agent includes an aromatic amine.
13. The method of claim 11 , wherein the activation agent includes an aromatic amine.