JP3355316B2 - Continuous mixing feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous mixing feeder capable of adding and mixing at least one additive to a powdery or powdery main material and continuously supplying the same to the next step quantitatively. It is about.

[0002]

2. Description of the Related Art When it is necessary to add at least one additive to a powdery or powdery main material and supply it to a supply section of an extruder or an injection molding machine, etc., it is roughly described below. The method (a) or (b) is adopted.

(A) A method of supplying a main raw material and an additive to a supply section of an extruder, an injection molding machine, or the like using a screw-type feeder.

(B) The main raw material and at least one additive are mixed by using a batch mixer and stored in a storage tank, and the mixture stored in the storage tank is extruded or injected by a transport pipe or the like. A method of supplying to a supply unit such as a molding machine.

[0005]

Among the above prior arts, in the method (a), it is difficult to uniformly disperse the additive in the powdery or granular main material. When it is used as a supply means to an injection molding machine or the like, there is a problem that the quality of a molded product varies.

Further, in the method (b), when a substance having tackiness is mixed, the mixture adheres to the transport pipe and changes the mixing ratio of the additive to the main raw material, or a difference in specific gravity. When a mixture having a large particle size is mixed, there is a problem that the mixture is separated due to a difference in specific gravity while passing through a transport pipe or the like and becomes non-uniform.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to continuously mix at least one additive with a powdery or powdery main raw material by continuously mixing the same. It is an object of the present invention to realize a continuous mixing feeder capable of supplying a fixed amount of water.

[0008]

In order to achieve the above object, a continuous mixing feeder according to the present invention comprises a barrel, a screw rotatably disposed in the barrel, and a rotation driving means for rotating the screw. A continuous mixing feeder in which a constant-rate extrusion zone, a mixing zone, and a scraping zone are sequentially formed from the upstream side by changing the shape of the barrel and the screw, wherein the constant-rate extrusion zone is an upstream end side in the barrel. It consists of a front cylindrical part having a supply port for supplying the main raw material and a fixed-quantity extruding part provided with a full flight on the peripheral surface of the shaft part of the screw, and the mixing zone is at least on the upstream end side of the barrel. A trough portion having one additive supply port and having a substantially U-shaped cross section and a circumferential surface of a shaft portion of the screw are formed along the axial direction. And a ribbon screw with a space between the plate-shaped stirring blade protruding in a zigzag shape and spaced apart from each other and projecting in the radial direction, and a peripheral surface of the shaft portion supported by the stirring blade. consists of a mixing section, scraped on the peripheral surface of the scraped zone is detachably connected to the shaft portion of the screw and the rear cylindrical portion having a discharge port for discharging the mixture to the downstream end of said barrel Rutotomoni its consists scraping unit use stirring vanes are provided, characterized in that configured to separately prepared shapes had been different scraped stirrer blades can be exchanged for scraped portion provided on the peripheral surface of its is there.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a continuous mixing feeder according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the continuous mixing feeder includes a barrel 1, a screw 2 rotatably disposed in the barrel 1, and a rotation driving means 1 for rotating the screw 2.
5, by changing the shapes of the barrel 1 and the screw 2, a quantitative extrusion zone X, which will be described later in order from the upstream side,
A mixing zone Y and a scraping zone Z are configured.

The constant-rate extrusion zone X includes a cylindrical front cylindrical portion 3 in the barrel 1 and a constant-rate extrusion in which a full flight 7 is provided on a peripheral surface of a shaft portion 6 of a screw 2 disposed in the front cylindrical portion 3. And plays a role of quantitatively transferring the main raw material supplied from the supply port 10 provided on the upstream end side of the front cylindrical portion 3 to the mixing zone Y.

The tip of the shaft protruding outward from the rear cylindrical portion 5 is rotatably supported by a support 16 via a bearing (not shown).

The mixing zone Y is spaced apart from each other along the axial direction on the peripheral surface of the trough portion 4 having a substantially U-shaped cross section in the barrel 1 and the shaft portion 6 of the screw 2 disposed in the trough portion 4. A mixing device in which a plate-shaped stirring blade 8a protruding in a zigzag shape and projecting in a radial direction and a ribbon screw 8b spaced from the peripheral surface of a shaft 6 supported by the stirring blade 8a are provided. And a first additive supply port 12, which is provided at an upstream end of the trough section 4 of the barrel 1 at an axial distance from the main raw material that has been quantitatively transferred from the constant-rate extrusion zone X, Of mixing the respective additives supplied from the additive supply port 13 and the third additive supply port 14 into a mixture in which each additive is uniformly dispersed with respect to the main raw material, and transferring the mixture to the scraping zone Z. Is responsible for.

[0014] The number of additive supply ports is not limited to three.
It can be increased or decreased to any number as needed.

A scraping zone Z is formed at a boundary between the cylindrical rear cylindrical portion 5 of the barrel 1 and the mixing portion of the shaft portion 6 of the screw 2 disposed in the rear cylindrical portion 5. Ru is detachably connected via a like
With forward paddle 9a and reverse paddles 9b of the peripheral surface spaced apart from each other in the axial direction like trefoil its consists scraped portion projecting alternately, and further mixing the transported mixture from the mixing zone Y rearward It plays a role of sweeping out of the machine from a discharge port 11 provided on the downstream end side of the cylindrical portion 5.

In the present embodiment, the forward paddle 9
a is projected at an inclination angle to the axial direction so as to transfer the mixture toward the downstream side, and the reverse paddle 9b is projected at an inclination angle to the axial direction so as to push the mixture back toward the upstream side. .

[0017] Then, the writing unit that is different scraped for stirring blade shapes, such as a full-flight and ribbon screw is provided on the peripheral surface of that has been separately prepared.

Next, the operation of the continuous mixing feeder according to the present embodiment will be described.

The fixed-rate extrusion zone X via the supply port 10
The powdery or granular material supplied to the barrel 1
Is transferred to the mixing zone Y by a constant-rate extruding section provided with a full flight 7 on the peripheral surface of the shaft 6 of the screw 2 disposed in the front cylindrical portion 3 of the screw 2.

The powdery or powdery main material quantitatively transferred to the mixing zone Y as described above is supplied from the first additive supply port 12, the second additive supply port 13, and the third additive supply port 14. The first additive and the second
And the third additive are mixed with the stirring blade 8a and the ribbon screw 8b to form a mixture in which the additive is uniformly dispersed, and the mixture is transferred to the scraping zone Z.

Due to the interaction between the stirring blade 8a and the ribbon screw 8b, the mixture conveyed in the trough portion 4 having a substantially U-shaped cross-section has a substantially U-shaped cross-section as shown in FIG. From the trough bottom surface 4a in the trough portion 4 and is transported downstream while being subjected to floating mixing and inversion mixing. Is done. As a result, a mixture in which the additives are uniformly dispersed with respect to the main raw material is transferred to the scraping zone Z.

After the above, in the scraping zone Z, the forward paddle 9a and the reverse paddle 9b alternately alternately transfer the mixture downstream and push back the mixture upstream. As a result, the filling rate of the mixture increases, and the mixture becomes a mixture in which the additive is uniformly dispersed in the main raw material, and is continuously discharged from the discharge port 11 to the outside of the machine.

[0023] In the present invention, since the scraped portion stirring blade for scraping the peripheral surface of detachably linked Rutotomoni it to the shaft portion 6 is provided in the screw 2 is detachable, the embodiment described above the scraping portion provided alternately trefoil forward paddle 9a and reverse paddles 9b spaced apart from each other in the axial direction on the peripheral surface of its shown, provided full flight separately prepared by the peripheral surface of its had It can be replaced with a scraping portion provided with a scraping blade of another shape such as a material or a ribbon screw. As a result, one continuous mixing feeder can cope with main raw materials and / or additives having different physical properties.

[0024]

Since the present invention is configured as described above, the following effects can be obtained.

In the mixing zone, the main raw material transferred quantitatively from the constant-rate extrusion zone and the added additive are repeatedly mixed and suspended repeatedly to form a mixture in which the mixture is uniformly dispersed and mixed. The mixture is continuously discharged from the discharge port through the ejection zone without stagnation in the barrel.

Further, scraped portion is a removable, it can be exchanged for scraped portion different scraping stirrer blade shapes are provided on the peripheral surface of its which had been separately prepared. For this reason, one continuous mixing feeder can cope with main raw materials and / or additives having different physical properties.

As a result, a mixture in which the additive is uniformly dispersed in the main raw material can be continuously and stably supplied to the supply section in the next step.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a continuous mixing feeder according to one embodiment.

FIG. 2 is a schematic sectional view taken along line AA of FIG.

FIG. 3 is a schematic sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 barrel 2 screw 3 front cylindrical portion 4 trough portion 4a trough bottom surface 5 rear cylindrical portion 6 shaft portion 7 full flight 8a stirring blade 8b ribbon screw 9a forward paddle 9b reverse paddle 10 supply port 11 discharge port 12, 13, 14 additive supply Mouth 15 Rotation drive means 16 Support

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-33838 (JP, A) JP-A-60-161110 (JP, A) JP-A-5-116734 (JP, A) Japanese Utility Model Showa 49- 1417 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01J 4/00-4/02 B29B 7/40 B01F 7/02

Claims (1)

(57) [Claims] 1. A barrel (1), a screw (2) rotatably disposed in the barrel, and a rotation driving means (15) for rotating the screw, wherein the barrel and the screw are shaped. A continuous mixing feeder in which a constant-rate extrusion zone (X), a mixing zone (Y), and a scraping zone (Z) are sequentially formed from the upstream side, wherein the constant-rate extrusion zone is mainly located at an upstream end side of the barrel. It comprises a front cylindrical portion (3) having a supply port (10) for supplying a raw material, and a fixed amount extruding portion provided with a full flight (7) on a peripheral surface of a shaft portion (6) of the screw,
The mixing zone has at least one additive supply port (12, 13, 14) on the upstream end side of the barrel and has a trough (4) having a substantially U-shaped cross section and a shaft ( 6) A plate-shaped stirring blade (8a) protruding in a zigzag shape at intervals along the axial direction on the circumferential surface of the shaft and a circumferential surface of the shaft supported by the stirring blade. Ribbon screw (8
b), wherein the scraping zone has a rear cylindrical portion (5) having a discharge port (11) for discharging the mixture to the downstream end side of the barrel, and a shaft portion (6) of the screw. ) removable it is rotatably connected to the Rutoto
Consists agitation blade for scraping the peripheral surface scraped portion provided in Moniso, configured to replace the separately prepared different scraping stirrer blade shapes had been the scraped portion provided on the peripheral surface of its A continuous mixing feeder characterized by: