Title of Invention

AN AGITATION APPARATUS FOR AGITATING PELLETS OF SYNTHETIC RESIN

Abstract

57) Abstract:- An agitator apparatus for pellets of raw material of synthetic resins, comprising an agitation vessel for pellets and coloring agents which is removably housed in a supporting frame and an agitator mounted elevatably on the supporting frame for entering in to and withdrawing from the vessel, and characterized by that the agitator has a plurality of agitating legs and agitating blades which are mounted respectively to the lower end of the agitating legs and that the agitation vessel is provided in the center bottom with an upright guiding pillar, to which a stationary blade is fixed and is provided in the inner peripheral wall with a plurality of mixing blades for agitating the pellets together with coloring agents in the agitation vessel to accomplish the uniform coloring onto the pellets.

Full Text

This invention relates to an agitation apparatus for agitating pellets of synthetic resins to be used for uniformly mixing and coloring the pellets of raw materials of synthetic resins to be supplied to an extrusion machine. The known agitation apparatus of this kind comprises a rotary agitator having a rotating shaft fixed at its center position, said rotary agitator is provided with a closing lid on its upper end for pouring pellets and with a discharging port at its lower end, both ends of the rotating shaft are supported rotatably by a column, a pulley is fixed to one end extended to the outside of the column and another pulley is also fixed on the shaft of an electric motor disposed at the lower end of the column, the both pulleys are connected with a belt. Therefore, pulleys are driven by the motor, and a rotary agitator is rotated by the center rotating shaft to which the pulley is fixed for mixing and coloring the pellets. In the known agitation apparatus, any agitating condition o.f pellets can not be observed from the outside of the agitation apparatus itself, as the rotary agitator, into which the pellets were poured from the closing lid provided on the upper end thereof, is rotated for mixing and coloring the pellets and , on the other hand, it takes a long time for mixing and coloring operation to get the pellets thoroughly uniformly colored, because of the pellets in the rotary agitator only circumferentially sliding upward and downward along inside of said rotary agitator. Moreover, upon completion of the mixing and coloring operation, it needs to clean up the inside of the rotary agitation, especially coloring agents therefrom, and the cleaning of the inside of the rotary agitator takes much times and labors. SUMMARY OF THE INVENTION Accordingly, an object of this invention is to provide an agitation apparatus for pellets of synthetic resins enabling to get the pellets colored uniformly in a short time by agitating the pellets and coloring agents together in the agitation vessel, enabling readily to observe the mixing/coloring conditions of pellets from the outside of the agitation apparatus, and enabling to get the agitation vessel cleaned simply and easily. The agitation apparatus for pellets of synthetic resins in accordance with this invention comprises a cylindrical agitation vessel housed removably within a supporting frame for pouring pellets of synthetic resins and coloring agents thereinto and an agitator mounted movably upward and downward to the supporting frame tor entering into and withdrawing from the vessel, said agitator is provided with a plurality of agitating legs respectively having agitating blade on each lower end thereof and said vessel is provided with an upright guiding pillar with at least one stationery blade in its bottom center and with a plurality of mixing blades in the inner circumferential wall. Accordingly the present invention provides an agitation apparatus for agitating pellets of synthetic resin said apparatus comprising a supporting frame; a cylindrical vessel removably housed in said supporting frame and to receive pellets to be agitated; an agitator mounted on said supporting frame for movement upwardly and downwardly relative thereto, said agitator having agitating means to be entered into and withdrawn from said vessel upon downward and upward movement, respectively, of said agitator, an upright guiding pillar positioned in a center of a bottom of said vessel; a stationary blade extending from said pillar in a direction toward an inner peripheral surface of said vessel; and a plurality of mixing blades extending from said inner peripheral surfce in a direction toward said pillar, said mixing blades being spaced from each other. With reference to the accompanying drawings, in which : Fig. 1 is a front view of the agitation apparatus in accordance with this invention showing the agitator being in a descended position. Fig. 2 is a front view of the agitation apparatus in accordance with this invention showing the agitator being in an elevated position. Fig. 3 is a plane view of the agitation apparatus in accordance with this invention. Fig. 4 is a perspective view showing the inside of the agitation vessel in accordance with this invention. Fig. 5 is a sectional plane view along a line A-A of the Fig. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An agitation apparatus for pellets of synthetic resins in accordance with this invention will be explained in detail with reference to the embodiment shown in the accompanying drawings. In Figs. 1-3, the agitation apparatus of this invention has a supporting frame 1 assembled approximately in the rectangular shape with longitudinal frames 4 at four corners, side frames 5 of front and rear sides, and lateral frames 6 of right and left sides. Between the upper and lower lateral frarnes 6, 6 disposed on the both sides of the supporting frame, there is fixed an elevator 8, in which a guiding bar 7 is included to move upwardly and downwardly therein, the elevator 8 is provided at the upper end of the guiding bar 7 with an elevating carrier 9 to which an atitator 3 is mounted. The elevator 8 is constituted of cylinders of air or hydraulic pressure, the air or hydraulic pressure is poured into or withdrawn from the cylinder, thereby causing the guiding bar 7 and the elevating carrier 9 to move together upwardly and downwardly. An agitation vessel 2 is removably housed in the inside of the supporting frame 1, and comprises a cylindrical vessel in which the pellets of synthetic resin and coloring agents are poured . The agitation vessel 2 is provided at the center of the bottom 10 with an upright guiding pillar 11 to which a stationary blade 12 is secured, said stationary blade 12 is protruded perpendicularly from a portion of the tangent of the circumference of the upright guiding pillar 11 so as to stop temporarily the movement of pellets of raw materials. Furthermore, in the agitation vessel 2, there is formed a plurality of mixing blades 14 which are projected respectively to the inside from the cylindrical inner circumferential wall surface 13 at the predetermined distance alternately to each other in the upper and lower direction. An agitator 3 is mounted to the center portion of the elevating carrier 9 fixed to the guiding bar 7 of the elevator 8, said agitator 3 has an electric motor 5 disposed on the upper part of the elevating carrier 9 and a rotating shaft 16 protruded to the lower part of the carrier 9. Further the agitator 3 is provided with a plurality of agitating legs 17 mounted to the lower and of the rotating shaft 16 and with agitating pawls 18 secured each to the lower end of the agitating legs 17, each agitating leg 17 comprises a horizontal portion extending from the lower end of the rotating shaft 16 parallel to the side frame 5 and the lateral frame 6 of the supporting frame 1 and a vertical portion extending parallel to the longitudinal frame 4 and bending vertically to the side frame 5 and lateral frame 6, and the agitating pawls 18 are inclined inwardly toward an axis of the rotating shaft 16 to make a favorable mixing of pellets. The agitator 3 can be moved by the downward and upward movement of the elevating carrier 9 between two positions of the descended position shown in Fig. 1 which is the agitating and mixing operation position where the agitating legs 17 and agitating pawls 18 are inserted into the agitation vessel 2 housed within the supporting frame 1 and the elevated position shown in Fig.2. which is out of the agitating and mixing operation position where the agitating pawls 18 are located above the agitation vessel 2. In case of agitating, mixing and coloring the pellets in the agitation apparatus according to this invention, the raw material pellets of synthetic resins are supplied from a storing tank to the agitation vessel 2 together with the given coloring agents. The agitation vessel 2 is settled into the supporting frame 1 of the position shown in Fig. 2 where the agitator 3 is elevated to the upmost position within the supporting frame 1. Then by depressurizing the air of hydraulic pressure from the cylinder of the elevator 8, the elevating carrier 9 is descended and the agitating legs 17 and pawls 18 of the agitator 3 is inserted into the agitation vessel 2 which is housed in the supporting frame 1, thereupon the agitator 3 is moved into the descended position shown in Fig. 1. Wherein the agitating legs 17 and pawls 18 are rotated by means of the electric motor 15 and the pellets are agitated, mixed, and colored. In the agitation of the pellets with the agitating pawls 18, the pellets and coloring agents move in the same direction within the vessel 2, however the movement of the pellets will be disturbed temporarily by the mixing blade 14 mounted on the inner peripheral wall surface 13 of the vessel 2 and the stationary blade 12 mounted on the upright guiding member 11, thereby said movement in the same direction will be changed to produce a turbulence for coloring uniformly overall pellets and it is possible to enhance a much better coloring efficiency of pellets. Upon completion of mixing and coloring the pellets, the electric motor is stopped and then by pressurizing the air or hydraulic pressure to the cylinder of the elevator 8, the agitator 3 having the agitating pawls 18 are moved to the elevated position shown in Fig.2 and the agitator vessel 2 is taken out from the supporting frame 1 for supplying them to a transferring apparatus. WE CLAIM : 1. An agitation apparatus for agitating pellets of synthetic resin said apparatus comprising a supporting frame; a cylindrical vessel removably housed in said supporting frame and to receive pellets to be agitated; an agitator mounted on said supporting frame for movement upwardly and downwardly relative thereto, said agitator having agitating means to be entered into and withdrawn from said vessel upon downward and upward movement, respectively, of said agitator; an upright guiding pillar positioned in a center of a bottom of said vessel; a stationery blade extending from said pillar in a direction toward an inner peripheral surface of said vessel; and a plurality of mixing blades extending from said inner peripheral surface in a direction toward said pillar, said mixing blades being spaced from each other. 2. The Apparatus as claimed in claim 1, wherein said plurality of mixing blades are arranged in a circumferential direction of said vessel to protrude alternately from an upper portion and a lower portion of said inner peripheral surface. 3. The apparatus as claimed in claim 1, wherein said stationary blade is secured to said pillar. 4. The apparatus as claimed in claim 1, wherein said mixing blades are secured to said inner peripheral surface. 5. The apparatus as claimed in claim I, wherein said supporting frame has at least one elevator having an upwardly and downwardly movable guide bar, and wherein an elevating carrier is connected to said guide bar and supporting said agitator. 6. The apparatus as claimed in claim 5, wherein said agitator has an electric motor disposed on an upper portion of said elevating carrier, a rotating shaft extending downwardly from said motor, a plurality of agitating legs mounted on a lower end of said shaft, and agitation pawls secured to lower ends of said agitating legs. 7. An agitation apparatus for agitating pellets of synthetic resin substantially as hereinbefore described with reference to the accompanying drawings.

Documents:

1608-mas-1996 abstract.pdf

1608-mas-1996 claims.pdf

1608-mas-1996 correspondence others.pdf

1608-mas-1996 correspondence po.pdf

1608-mas-1996 description (complete).pdf

1608-mas-1996 drawings.pdf

1608-mas-1996 form-2.pdf

1608-mas-1996 form-26.pdf

1608-mas-1996 form-4.pdf

1608-mas-1996 form-6.pdf

1608-mas-1996 form-9.pdf

1608-mas-1996 others.pdf

1608-mas-1996 petition.pdf