Multiple fluid mixing apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTakao Inoue, Kenichiro Suetsugu
Life of this patent
Estimating the term…
Abstract
A mixing apparatus for mixing two or more liquids, e.g. as required in reactive injection molding, has a rotary member mounted for rotational and axial movement within a cylindrical bore of a mixing head, with a convex conical surface of the rotary member disposed opposite a concave conical surface formed at a lower end of the bore. Mixing is performed by axially displacing the rotary member to form a mixing gap between the conical surfaces, injecting two or more liquids into the gap from the periphery thereof, and rotating the rotary member at high speed to mix the liquids, the mixture being ejected from a central aperture formed in the concave conical surface. On completion of the mixing operation, residual mixture is ejected by moving the conical surfaces into close contact.
Claims10
An apparatus for mixing a plurality of liquids, comprising:
- a mixing head having a cylindrical bore formed therein, and having a lower surface with an ejection aperture formed therein for outlet of a mixture of said liquids following mixing;
- a rotary member shaped to fit closely within said cylindrical bore opposite said lower surface of said mixing head, and supported by a shaft for rotation relative to said lower surface of said mixing head and for movement along the axis of said rotation for selectively establishing a condition in which said rotary member is in close contact with said lower surface of said mixing head and a condition in which a mixing gap is formed between said rotary member, said lower surface of the mixing head, and a circumferential section of said cylindrical bore;
- means for rotating said rotary member;
- means for axially displacing said rotary member along said axis of rotation;
- a plurality of supply apertures formed in said mixing head, communicating with said mixing gap, for supplying said raw materials in liquid form said mixing gap;
- sealing means disposed between said rotary member and said mixing head;
- and
- means for supplying said liquified raw materials to said supply apertures, wherein said means for displacing said rotary member along said axis of rotation comprises an elastic body, said elastic body being compressed under the action of the liquified raw materials entering the mixing gap to cause the rotary member to move away from the lower surface of the mixing head to compress the elastic body, and wherein the spring force of the compressed elastic body serves to restore the elastic body in the direction of the lower surface of the mixing head to reduce the size of the mixing gap upon termination of supplying of the liquified raw materials into the gap.
Dependencies are inferred from the claim text.