Extrusion equipment adapted for supercritical foaming and mixing
OwnerYen-Ju Chouinventor
Life of this patent
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Abstract
An extrusion equipment adapted for supercritical foaming and mixing of a raw material includes a mixing unit, an injection unit for injection of supercritical fluid into the mixing unit, and an extrusion unit for extrusion of the raw material. The mixing unit includes a tube for input of the raw material, and a propelling screw rod and an auxiliary screw rod that are disposed side by side in the tube and that cooperatively compress and propel the raw material. The auxiliary screw rod rotates at a speed at least twice that of the propelling screw rod and in a direction opposite to that of the propelling screw rod.
Claims9
An extrusion equipment adapted for supercritical foaming and mixing of a raw material that is in a molten state, comprising:
- a first mixing unit including:
- a first tube that is adapted for receiving input of the raw material;
- a first screw rod that is mounted rotatably in said first tube and that is used for propelling the raw material;
- and
- an auxiliary screw rod that is mounted rotatably in said first tube, that is disposed side by side with said first screw rod, and that cooperates with said first screw rod to compress and propel the raw material,
- wherein said auxiliary screw rod has a rotation speed at least twice that of said first screw rod, and has a rotating direction opposite to that of said first screw rod;
- a first injection unit connected to said first mixing unit, and used for injecting a supercritical fluid into said first tube;
- and
- an extrusion unit disposed downstream of said first mixing unit, and used for extrusion of a mixture of the raw material and the supercritical fluid;
- wherein said first tube is formed with a feed inlet for feeding the raw material into said first tube, and said auxiliary screw rod is not longer than said first screw rod and corresponds in position to said feed inlet;
- and
- wherein said first injection unit is disposed downstream of said feed inlet of said first tube and between said extrusion unit and said feed inlet, and is spaced apart from said feed inlet.
Dependencies are inferred from the claim text.