JP2003266427A - Equipment for mixing and feeding granular plastic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To feed a plastic molding machine with a virgin material (main material) and a master batch (coloring material) to be the materials of a plastic molded article of a specific color that are produced in a small quantity, while mixing them uniformly in a prescribed mixture ratio by a needed quantity and at a needed time. <P>SOLUTION: A main shoot (8A) made to communicate with a main material hopper (7A) and a joining shoot (8B) extending from a coloring material hopper (7B) and joining the main shoot (8A), are provided. Metering feeders (9A, 9B) feeding the main material (2A) and the coloring material (2B) so that they are supplied simultaneously to the joining point of the shoots (8A, 8B), while metering them in conformity with the mixture ratio, are disposed on the upstream side of the joining point of the shoots (8A, 8B). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular plastic material as a main material and a granular plastic material as a coloring material, which are fed to a raw material inlet of a plastic molding machine while being mixed at a preset mixing ratio. Plastic material mixing and feeding device.

[0002]

2. Description of the Related Art For example, in the case of performing extrusion molding or injection molding of thermoplastics, granular plastic material formed into flakes, pellets, chips and beads is fed to a raw material inlet provided in a material supply inlet of a heating cylinder. Throw in,
While being melted by the heating cylinder, it is extruded by a screw and passed through a die of a predetermined shape or injected into a molding die to mold a plastic product of a desired shape.

[0003] Since plastic products can be colored in various ways on their own materials, monochromatic products and the like have the merit that the coloring step is not required just by making a molded product using colored plastic of the finish color, and the production efficiency is excellent. is there.

And, such a colored plastic is
A virgin material (main material) made of uncolored granular plastic material and a masterbatch (coloring material) made of colored granular plastic material obtained by coating the surface of plastic of the same material with pigment at a predetermined ratio are mixed in advance. In advance, this is fed to the raw material input port of the plastic molding machine.

[0005]

By the way, this kind of colored plastic material is delivered in a state that it is uniformly mixed by the raw material manufacturer in advance so that there is no color variation, and the transaction unit amount for one color is large. When molding automobile parts, etc., the standard specification has a limited number of colors and many colors come out, so plastic molded products of the same color are mass-produced, and as a result, plastic materials are used up in a relatively short period of time. be able to.

However, since the owner-colored plastic molded product whose color is designated by the user is produced in small quantities, a plastic raw material in which a virgin material (main material) and a masterbatch (coloring material) are mixed in advance for such a special color. If you purchase the product, you will not be able to use it in a short period of time, you will need to store it for a considerably long time, and if the storage condition is poor, the plastic material will deteriorate.

In this case, since the same molded article has the same virgin material (main material), a master batch (coloring material) of a plurality of colors is prepared, and if necessary, these are mixed and the raw material is mixed. If it is put into the input port, a small amount of plastic molded product of that color can be produced.

However, even if it is possible to calculate the minimum required amount of the plastic raw material in the case of small-quantity production, it is necessary to mix a large amount in anticipation of the defective rate, and even if it is mixed in this way. However, if unexpectedly many defective products occur, the plastic raw material will run out, so it is necessary to mix a large amount in case of emergency, and in many cases, such a material is required. Not doing so causes the inconvenience of leaving excess plastic material.

Therefore, according to the present invention, even when a virgin material (main material) and a masterbatch (coloring material), which are materials for a plastic molded product of a special color produced in a small amount, are fed,
(EN) Provided is a compact and inexpensive granular plastic material mixing and feeding device, which can feed a required amount to a plastic molding machine while uniformly mixing it at a predetermined mixing ratio when needed, and has a simple structure. Is a technical issue.

[0010]

In order to solve this problem, the invention of claim 1 mixes a granular plastic material as a main material and a granular plastic material as a coloring material in a preset mixing ratio. While being a granular plastic material mixing and feeding device that feeds directly or indirectly to a raw material inlet of a plastic molding machine, a main chute communicated with a main material hopper that stores the main material, and the coloring material. A weighing chute that joins the main chute from the coloring material hopper to be stored, and a metering concave portion having a capacity corresponding to the mixing ratio of the main material and the coloring material is formed on the peripheral surface on the upstream side of the confluence point of each chute. Each of the weighing feeders provided with a rotor is arranged, and by rotating the weighing rotor, the main material and the main material dropped into the weighing recess from the material receiving port communicating with each hopper. Characterized in that it adapted to synchronously supply a coloring material with respect to the confluence of the chute of each material outlet. The term "granular plastic material" as used herein refers to a plastic material such as flakes, pellets, chips, beads, etc. that can be handled as particles regardless of shape.

According to the first aspect of the present invention, by rotating the measuring rotor, the main material and the coloring material are filled in the measuring concave portions from the respective hoppers, and are supplied synchronously to the confluence points of the respective chutes. To be done. At this time, the measuring recesses formed in the respective measuring rotors are formed with a volume corresponding to the mixing ratio of the main material and the coloring material, so that the mixing ratio of the supplied main material and the coloring material is maintained constant. . Then, if the rotation speed of the metering rotor is increased, the supply amount of the mixed material of the main material and the coloring material is increased while maintaining the mixing ratio constant, and if the rotation speed is decreased, the mixing ratio is maintained while maintaining the mixing ratio constant. The material supply is reduced. Therefore, while mixing the main material and the coloring material according to the mixing ratio, it is possible to supply the necessary amount of the mixed material when necessary. Also, if the respective measuring rotors are rotated by shifting the timing by the time difference until the main material and the coloring material reach the merging point, the main material and the coloring material are supplied synchronously to the merging point of the respective chutes. And mixed at the confluence at the same time. In this way, the granular plastic materials are fed from their respective hoppers through the chute by their own weight, so that they do not require a power source for transportation, the structure is simple, and the device is compact and lightweight. Can be achieved.

According to the second aspect of the present invention, since the air nozzle for injecting air into the metering recess is provided at the material delivery port of the metering feeder, it has a high viscosity and tends to be charged with static electricity and adheres to the inner wall of the metering recess. Even when feeding a plastic material that is easy to do, air is injected from the air nozzle into the measuring recess, so regardless of the material, the granular plastic material is completely blown off by the air pressure and remains in the measuring recess. Without fail, they are surely dropped into each chute, and the mixing ratio is maintained exactly constant.

According to the third aspect of the present invention, the material receiving port and the measuring concave portion of the measuring feeder are formed in the shape of an elongated hole extending in a direction intersecting with the rotation direction of the measuring rotor, and the measuring concave portion is formed when the measuring rotor rotates. One of the edges of the material receiving port and the measuring recess for shearing the filled plastic material is formed to be inclined at a predetermined angle with respect to the other edge.

According to the third aspect of the present invention, when the measuring rotor is rotated in a state where the material receiving port is filled with the plastic material in the measuring recess, the plastic material is sandwiched between the material receiving port and the edge of the measuring recess. Although it is sheared, one edge is formed to be inclined at a predetermined angle with respect to the other edge, so that the edge is sheared at the intersection of the edges and the shear point moves sequentially. Therefore, the granular plastic material is sheared at a time little by little, and the shearing force is dispersed, so that the lightweight rotor can be reliably rotated with a small load.

According to a fourth aspect of the present invention, a conical dispersion cone for uniformly dispersing the main material and the coloring material is arranged on the downstream side of the merging point where the merging chute merges with the main chute.
A funnel portion for collecting the main material and the coloring material near the apex of the dispersion cone is formed between the cone and the confluence.

According to the fourth aspect of the present invention, the main material and the coloring material sent from each hopper and weighed by the weighing feeder are merged at their merging points after passing through their respective chutes.
It is collected in one place by the funnel part and dropped to the vicinity of the top of the dispersion cone, then hits the slope of this dispersion cone and falls. At this time, since both the main material and the coloring material are scattered and dispersed in various directions of 360 °, a uniform mixed state can be obtained.

According to the fifth aspect of the invention, a scraper for scraping off the crushed pieces adhering to the peripheral surface of the weighing rotor into the chute is arranged at the front end edge of the material feeding port of the weighing feeder in the rotational direction.

According to the fifth aspect of the present invention, when the measuring rotor is rotated in a state where the plastic material dropped from the material receiving port is filled in the measuring receiving port, it is between the material receiving port and the edge of the measuring recess. The plastic material is sandwiched and sheared, and even if the crushed pieces adhere to the peripheral edge of the weighing rotor and are carried to the material delivery port, they are scraped off by the scraper. In particular, crushed pieces of highly viscous plastic material tend to adhere to the peripheral surface, but since they are reliably scraped off by the scraper, the crushed pieces adhere to the entire circumference surface of the weighing rotor and get caught between it and the casing. No malfunction will occur.

According to a sixth aspect of the present invention, a flow restricting member for diverting the flow of the granular plastic material toward the outlets of the hoppers in the vertical direction toward the peripheral wall side of the respective hoppers is arranged directly above the outlets of the hoppers.

According to the invention of claim 6, of the flow of the granular plastic material concentrated from the center and the peripheral wall of the hopper to the central outlet, the gravity of the granular plastic material directed vertically downward from directly above is received by the flow restricting member. Therefore, gravity acting on the outlet of the hopper is reduced, and the granular plastic material easily flows from the periphery of the hopper through the inclined portion to the outlet of the hopper, and it is difficult for the materials to bridge each other in the hopper.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an explanatory view showing a granular plastic material mixing and feeding device according to the present invention, and FIG. 2 is an explanatory view showing a weighing feeder.

The granular plastic material mixing and feeding apparatus 1 of this embodiment is a virgin material (main material) 2A made of an uncolored thermoplastic granular plastic material, and a coloring material obtained by coating the surface of plastic of the same material with a pigment. Masterbatch (coloring material) made of granular plastic material 2
While B is mixed at a preset mixing ratio, it is directly or indirectly fed to the raw material inlet 4 of the plastic molding machine 3 via an intermediate hopper or the like.

The plastic molding machine 3 melts flakes, pellets, chips, and bead-shaped granular plastic materials charged from the raw material charging port 4 with a heating cylinder 5 and extrudes them with a screw to form a die (not shown) of a predetermined shape. Is passed through or is injected into the molding die F to mold a plastic product having a desired shape.

Further, the raw material inlet 4 is formed in a hopper shape, and a standard color material supply system 6 for feeding the standard color mixed material prepared by previously mixing the virgin material and the master batch from the tank to the inlet 4 is provided. Has been formed.

The granular plastic material mixing and feeding apparatus 1 of this embodiment is for feeding a plastic material of a special color other than the standard color to the raw material inlet 4 of the plastic molding machine 3 and stores the virgin material 2A. The main chute 8A from the main material hopper 7A to the raw material charging port 4 and the merge chute 8B that joins the main chute 8A from the coloring material hopper 7B that stores the master batch 2B are provided.

Further, the virgin material 2A and the masterbatch 2B dropped from the main material hopper 7A and the coloring material hopper 7B are weighed and delivered to the upstream side of the confluence of the chutes 8A and 8B in proportion to the mixing ratio. Weighing feeder 9
A and 9B are arranged.

The weighing feeders 9A and 9B are provided in a casing 10 in which an upward material receiving port 10in communicating with the hoppers 7A and 7B and a downward material feeding port 10out communicating with the chutes 8A and 8B are formed. A metering rotor 11 having a metering concave portion 12 having a capacity corresponding to the mixing ratio of the virgin material 2A and the masterbatch 2B is formed on the peripheral surface.

Six measuring recesses 12 are formed on the peripheral surface of the measuring rotor 11 at equal intervals, and the measuring recesses 12 of the measuring feeder 9A for the virgin material 2A and the measuring recesses 12 of the measuring feeder 9B for the masterbatch 2B are formed. The volume of
Is set to about 20 cm ³ and about 0.5 cm ^3, the volume ratio of the mixing ratio of the virgin material. 2A and masterbatch 2B: it is set equal to (40 1).

Thus, for example, when polypropylene virgin material 2A (diameter 4 to 5 mm) is fed, if the porosity is 30%, one metering concave portion 12 of the metering feeder 9A has a volume of 20 cm ^{3 and a} specific gravity of 0.1. 9 x 0.7 = about 12.6 g will be weighed. Further, when feeding the masterbatch 2B (diameter 2 mm), the volume of 0.5 cm ³ × specific gravity 0.9 × 0.7 = about 0.3 g each should be weighed in one weighing recess 12 of the weighing feeder 9B. become.

The material receiving port 10in and the measuring concave portion 12 are formed in the shape of an elongated hole extending in a direction intersecting with the rotating direction of the measuring rotor 11, and the plastic material filled in the measuring concave portion 12 when the measuring rotor 11 rotates. Edges 10 of the material receiving port 10in and the measuring recess 12 for shearing
a, 12a, one edge 12a is the other edge 10
It is formed to be inclined at a predetermined angle with respect to a.

In this example, the edge 10a of the material receiving port 10in
Is formed so as to intersect at right angles with the rotation direction of the weighing rotor 11, and the edge 12a of the measurement recess 12 is formed so as to intersect with the rotation direction of the measurement rotor 11 at a predetermined angle θ. . As a result, when the measuring rotor 11 is rotated at the time when the measuring material 12 is filled with the plastic material, the filled plastic material is transferred to the material receiving port 1
It is sandwiched and sheared by the respective edges 10a, 12a of 0 in and the measuring recess 12, but since the edge 12a of the measuring recess 12 is formed inclined with respect to the edge 10a of the material receiving port 10in, The edges 10a and 12a are sheared at a point where they intersect and overlap each other, and the shear point moves sequentially.
Therefore, the granular plastic material that is sheared at a time is little by little, and the shearing force is dispersed.
The lightweight rotor can be reliably rotated with a small load.

By rotating the metering rotor 11, the virgin material 2A and the masterbatch 2B dropped from the material receiving port 10in into the measuring recess 12 are dropped from the material sending port 10out to the respective chutes 8A, 8B. .

At this time, in each rotor 11, the time required for the virgin material 2A to fall from the material delivery port 10out of the weighing feeder 9A and reach the confluence point, and the masterbatch 2B.
Is rotated with a time difference until it falls from the material delivery port 10out of the weighing feeder 9B and reaches the confluence point, whereby the virgin material 2A and the masterbatch 2B are supplied synchronously with respect to the confluence point, and the confluence point is simultaneously determined. It is designed to pass.

The material outlet 10out is provided with an air nozzle 13 for injecting air into the metering recess 12 when the metering rotor 11 rotates and the metering recess 12 is positioned at the material outlet 10out. .

Further, a scraper 14 for scraping off the crushed pieces adhering to the peripheral surface of the metering rotor 12 from the material outlet 10out into the respective chutes 8A, 8B is arranged at the front end edge of the material outlet 10out in the rotation direction. There is.

Each of the hoppers 7A and 7B has a semi-circular tubular flow restricting member that diverts the flow of the granular plastic material passing through the center of the hoppers 7A and 7B in the vertical direction toward the hopper outlet 7out toward the peripheral walls of the hoppers 7A and 7B. 15 is horizontally arranged right above the hopper exit 7out.

The merging chute 8B penetrates the side wall of the main chute 8A, opens downward at the center of the main chute 8A, and has a conical shape for uniformly dispersing the virgin material 2A and the masterbatch 2B on the downstream side of the merging point. Dispersion cone 16 of is arranged. Further, a funnel portion 17 for collecting and dropping the virgin material 2A and the masterbatch 2B near the apex of the dispersing cone 16 is formed between the cone 16 and the confluence point. A shutter 18 is provided at the lower end of the main chute 8A to shut off the supply from the granular plastic material supply device 1 while the standard color material supply system 6 is supplying the plastic material.

The above is one example of the configuration of the present invention, and its operation will be described below. First, a virgin material 2A and a masterbatch 2B for a special color to be molded separately from the standard color
Are stored in respective hoppers 7A and 7B in an appropriate amount.
When the standard color molding is completed, the material supply from the standard color material supply system 6 is stopped, the material remaining in the heating cylinder 5 is taken out, the shutter 18 is opened, and the granular plastic material mixing and feeding apparatus 1 Supplies special color materials.

First, when the weighing rotors 12 of the weighing feeders 9A and 9B are rotated at a predetermined timing, each hopper 7
A and 7B to virgin material 2A and masterbatch 2B
Are dropped into the respective measuring recesses 12. At this time, since the semicircular tubular flow restricting member 15 is horizontally arranged in each of the hoppers 7A and 7B, the gravity of the granular plastic material acting vertically downward is received by the flow restricting member 15. Then, the flow of the granular plastic material straight toward the hopper outlet 7out is diverted to the peripheral wall side of the hoppers 7A and 7B, and flows from the periphery of the hopper 7 through the inclined portion to the central hopper outlet 7out. At this time, since the flow restricting member 15 receives the gravity of the granular plastic material above it, the gravity acting on the hopper outlet 7out is reduced. Therefore, the granular plastic material easily flows from the periphery of the hopper 7 through the inclined portion to the hopper outlet 7out, and it is difficult for the materials to bridge each other in the hopper.

When the measuring rotor 11 is rotated at the time when the plastic material is filled in the measuring concave portion 12, the filled plastic material is filled with the material receiving port 10in and the measuring concave portion 12.
Although it is sandwiched between the edges 10a and 12a of each of the
The edge 12a of the measuring recess 12 is the edge 1 of the material receiving port 10in.
Since it is formed to be inclined with respect to 0a, the edge 10
It is sheared at a point where a and 12a intersect and overlap each other, and the shear point moves sequentially. Therefore, only a small amount of granular plastic material is sheared at one time,
Since the shearing force is dispersed, the lightweight rotor can be reliably rotated with a small load.

When the measuring concave portion 12 is rotated to the material delivery port 10out, the plastic material filled in the inside is dropped into the respective chutes 8A, 8B. Since the volume ratio of the respective measuring recesses 12 is set equal to the mixing ratio of the virgin material 2A and the masterbatch 2B (for example, 40: 1), the measuring rotor 12 is rotated at the same rotation speed (for example, 2 rp).
By rotating in m), the virgin material 2A and the masterbatch 2B can be fed at a preset mixing ratio. Further, depending on the rotation speed of the metering rotor 11, the feed rate can be increased or decreased while maintaining the mixing ratio constant.

At this time, since the air nozzles 13 for injecting air into the measuring recesses 11 are arranged at the respective material outlets 10out, a material having a high viscosity or being charged with static electricity and easily attached to the inner wall of the measuring recesses 11 is formed. Even when the granular plastic material is conveyed, regardless of the material, one particle is dropped from the measuring concave portion 11 into the respective chutes 8A and 8B, and the mixing ratio can be accurately maintained constant.

Further, even if the crushed pieces of the plastic material adhere to the peripheral edge of the measuring rotor 12 and are carried to the material delivery port 10out through the gap with the casing 10, they are scraped off by the scraper 14, so that the material delivery is carried out. The crushed pieces are not clogged in the gap portion from the outlet 10out to the material receiving inlet 10in, and the malfunction does not occur due to the crushed pieces.

In each rotor 11, the time required for the virgin material 2A to fall from the material delivery port 10out of the weighing feeder 9A to reach the confluence, and the masterbatch 2B to fall from the material delivery port 10out of the weighing feeder 9B. Depending on the time difference until reaching the confluence point, the timing is shifted to rotate. As a result, the virgin material 2A and the masterbatch 2B are supplied synchronously with respect to the confluence point and, after passing through the confluence point at the same time, are gathered in the center by the funnel section 17 and are placed under the dispersion cone. It is dropped so as to hit the vicinity of the apex of 16 and hits the slope of the dispersion cone and falls. At this time, since both the virgin material 2A and the masterbatch 2B are scattered and dispersed in various directions of 360 °, a uniform mixed state can be obtained.

Virgin material 2A and masterbatch 2B
Are mixed in a uniformly dispersed state and fed to the raw material inlet 4 of the plastic molding machine 3. Therefore, when this is melted in the heating cylinder 5, it is melted into a uniform color without unevenness, and the defective rate in extrusion molding / injection molding is small and the production efficiency is excellent.

In the case where the molded product for the special color is molded in this manner and then molded for other special colors, the residual plastic in the main chute 8A and the plastic molding machine 3 is removed, and the master of the coloring material hopper 8B is removed. The batch 2B is replaced with the next color material, and molding is performed with the next color material. Further, in the case of molding with the standard color, the shutter 18 is closed, the materials remaining in the hoppers 8A and 8B are individually stored, and the residual plastic in the main chute 8A and the plastic molding machine 3 is removed to obtain the standard color. The plastic material supplied by the material supply system 6 may be used for molding.

[0047]

As described above, according to the present invention, when a special-color plastic material having a small production quantity is flown through a standard-color production line, a main material to be the special-color plastic material. The granular plastic material for coloring and the granular plastic material for coloring material can be sent to the plastic molding machine while being uniformly mixed at the required mixing ratio when needed, so that a large amount of raw materials for small-scale production can be produced. It has a very good effect that there is no need to buy it and there is no need to store it. Further, since each granular hopper feeds while dropping the granular plastic material by its own weight through the chute, it does not require a power source for transportation,
There is also an effect that the structure is simple and the size and weight of the device can be reduced.

Further, if an air nozzle is provided at the material delivery port of the weighing feeder, even when a plastic material having a high viscosity or being easily charged with static electricity and easily attached to the inner wall of the weighing recess is fed, it is blown off from the weighing recess. Since it can be dropped into the chute, there is an effect that accurate measurement can be performed.

Further, when the material receiving port and the measuring recess are formed in the shape of an elongated hole extending in the direction intersecting the rotation direction of the measuring rotor, the material receiving port for shearing the plastic material filled in the measuring recess. And, if one of the edges of each of the measuring recesses is inclined at a predetermined angle with respect to the other edge, the intersections of the edges move sequentially,
Since the granular plastic material that is sheared at a time is small and the shearing force is dispersed, there is an effect that the lightweight rotor can be reliably rotated with a small load.

Furthermore, after the main material and the coloring material have passed through the respective chutes and merged at their merging points, they are collected in one place by the funnel portion and dropped near the apex of the dispersion cone. Are dispersed in various directions of 360 °, and there is an effect that a uniform mixed state is obtained.

If a scraper is provided at the material delivery port of the weighing feeder, even if fragments of the plastic material adhere to the peripheral edge of the weighing rotor and are carried to the material delivery port, they are scraped off in the chute, especially Even when a highly viscous plastic material is fed, it is possible to prevent crushed pieces from adhering to the entire peripheral surface of the weighing rotor and causing malfunction.

Further, if a flow restricting member for diverting the flow of the granular plastic material toward the outlet of the hopper in the vertical direction toward the peripheral wall side of each hopper is provided right above the outlet of the hopper, the flow from directly above to the outlet is blocked. Therefore, the flow toward the outlet is only the flow from the periphery of the hopper to the center through the inclined portion, and only the component force of the gravity of the granular plastic material acts on the outlet, so that the materials cause bridges in the hopper. It is difficult to do so, and there is an effect that the granular plastic material can be surely filled in each of the measuring concave portions.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a granular plastic material mixing and feeding device according to the present invention.

FIG. 2 is an explanatory view showing a weighing feeder.

[Explanation of symbols]

1 ………… Granular plastic material mixing and feeding device 2A: Virgin material (main material) 2B: Masterbatch (coloring material) 3 ………… Plastic molding machine 4 ... Raw material inlet 7A ... Main material hopper 7B ... Coloring material hopper 8A ... Main shoot 8B ... Joining shoot 9A, 9B ......... Weighing feeder 10in …… Material entrance 10out …… Material outlet 11 ………… Measurement rotor 12 ………… Measuring recess 13 ... Air nozzle 14 ………… Scraper 15 ... Flow restriction member 16 ………… Dispersion cone 17 ... Funnel section

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4F201 AB12 AC01 AC08 AL08 AL10                       AL12 AL16 AL21 AM10 BA01                       BC02 BC19 BC37 BK71 BK74                       BQ01 BQ07 BQ35 BQ50 BQ54

Claims (6)

[Claims] 1. A raw material inlet (4) of a plastic molding machine (3) while mixing a granular plastic material as a main material (2A) and a granular plastic material as a coloring material (2B) at a preset mixing ratio. ) Is a granular plastic material mixing and feeding device for feeding directly or indirectly to the main chute (8A) communicating with the main material hopper (7A) for storing the main material (2A), and the coloring Material (2B)
Is provided with a confluent chute (8B) that joins the main chute (8A) from the coloring material hopper (7B) that stores the main material (2A) on the peripheral surface on the upstream side of the confluence point of each chute (8A, 8B). ) And the coloring material (2B), a measuring rotor (1) having a measuring concave portion (12) having a capacity corresponding to a mixing ratio thereof.
The weighing feeders (9A, 9B) provided with 1) are arranged respectively, and by rotating the weighing rotor (11),
Material receiving port (1) communicating with each hopper (7A, 7B)
The main material (2A) and the coloring material (2B) dropped from 0 in) into the measuring concave portion (12) are the material delivery port (10 out).
The granular plastic material mixing and feeding device, characterized in that it is configured so as to supply the shoots (8A, 8B) to the merging points of the chutes (8A, 8B) synchronously. 2. The granular plastic material mixing and feeding apparatus according to claim 1, wherein an air nozzle (13) for injecting air into the measuring recess (12) is provided at the material outlet (10out). 3. The material receiving port (10 in) and the measuring recess (12) are formed in the shape of an elongated hole extending in a direction intersecting with the rotation direction of the measuring rotor (11), and the measuring rotor (11) is provided. One of the edges (10a, 12a) of the material receiving port (10in) for shearing the plastic material filled in the measuring recess (12) when rotating and the other end (12a) of the other is The granular plastic material mixing and feeding device according to claim 1 or 2, wherein the granular plastic material mixing and feeding device is formed so as to be inclined at a predetermined angle with respect to the end edge (10a). 4. A main material (2A) is located downstream of a confluence point where the confluent chute (8B) merges with the main chute (8A).
And a conical dispersion cone (16) for uniformly dispersing the colorant (2B), and the main material (2A) and the colorant (2B) are provided between the cone (16) and the confluence. The funnel part (1) that collects and drops near the top of the dispersion cone (16)
7. The granular plastic material mixing and feeding device according to claim 1, wherein 7) is formed. 5. A scraper (1) for scraping crushed pieces adhering to the peripheral surface of the weighing rotor (11) into the chute (8A, 8B) at the front edge of the material delivery port (10out) in the rotational direction.
The granular plastic material mixing and feeding device according to any one of claims 1 to 4, wherein 4) is provided. 6. A flow restricting member (15) for diverting the flow of the granular plastic material in the respective hoppers (7A, 7B) in the vertical direction toward the hopper outlet (7out) to the peripheral wall side of each hopper (7A, 7B). 6. The granular plastic material mixing and feeding apparatus according to claim 1, wherein the feeding means is provided right above the hopper outlet (7out).