JPH05200833A - Multi-mix feeder - Google Patents

Abstract

PURPOSE:To provide a multi-mix feeder having a small type and easy maintenance, etc. CONSTITUTION:In a multi-mix feeder A, the kneading spaces 10 with feeding ports 11 and discharging ports 12 are arranged in multistages up and down, and the adjacent kneading spaces up and down are connected by the discharging port 12 of the kneading space of upper stage and the feeding port 11 of the kneading space of lower stage, thereby constituting a housing 15. At least one paddle 7 is provided in said each kneading space 10, and the paddle 7 of each stage is connected to a driving source 5. While the material fed from the feeding port 11 is kneaded, it is discharged respectively into the discharging port 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-mix feeder for kneading and extruding a plastic material such as rubber or thermoplastic resin.

[0002]

2. Description of the Related Art Conventionally, as an extruder, one or two screws are housed in a long housing, and the kneading material supplied from one end of the housing is fed to the other end of the kneading material based on the rotation of the screw. It is widely known that the nozzle or die is used for extrusion.

[0003]

However, the above-mentioned conventional extruder has a problem that the axial length of the screw and the housing is long and the occupied area becomes extremely large.

Next, all the steps up to extrusion of the supplied material, ie, the steps of supplying, roughening, finely kneading, finishing kneading and extruding must be carried out by one screw or two screws arranged in parallel. Therefore, there is a problem that the load applied to the screw drive motor is large and an extra-large drive motor is required. Further, there is a problem that it takes a long time to repair or replace the large drive motor, and the operation must be stopped during that time. Further, there is a problem that a spare drive motor must be always provided in order to avoid a long-term operation stop.

Since the screw is also long, it takes a lot of labor and cost to manufacture and assemble it.
If the housing is damaged by foreign substances mixed therein, it takes a long time to replace and repair the screw, and there is a problem that the operation must be stopped during that time. In addition, there is a problem in that a spare screw must always be provided in order to avoid a long-term operation suspension.

In the above extruder, generally, as a vent mechanism for removing air contained in the material, the blades and shafts of the screw are partially deformed, the screw diameter is partially changed, and the deformed portion is changed. Exhaust holes are provided in the corresponding housing parts. However, in the vent mechanism described above, in actual operation, the exhaust gas can be adjusted only by adjusting the rotation speed of the screw. Further, since the screw is a single member, it is naturally impossible to partially change the rotation speed. Therefore, it has been impossible to obtain the optimum air exhaust conditions while making delicate adjustments.

[0007]

The present invention has been made to solve the above-mentioned problems, and a multi-mix feeder of the present invention has a kneading space having a supply port and a discharge port, which are arranged in multiple stages vertically. , The adjacent upper and lower kneading spaces are connected to each other through the discharge port of the upper kneading space and the supply port of the lower kneading space to form a housing, and at least 1 is provided in each of the kneading spaces.
Book paddles are provided, and the paddles at the respective stages are connected to drive sources, respectively, and the materials supplied from the supply ports are kneaded and discharged to the discharge ports, respectively.

The housing is preferably constructed by combining a plurality of unit housings each having a kneading space. Further, the exhaust hole of the vent mechanism is formed by providing an air vent hole in the vicinity of the connecting portion between the exhaust port and the supply port. Further, the paddle may be composed of a plurality of unit paddles.

[0009]

In the multi-mix feeder having the above structure, the material is supplied from the uppermost supply port. This material is conveyed in the kneading spaces of the respective stages while being kneaded by the paddles which are rotationally driven by the driving means, and is supplied to the kneading spaces of the lower stage adjacent to the kneading spaces through the discharge ports. Then, after repeating the above-described conveyance, the sheet is discharged from the lowermost discharge port to the outside of the machine.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a multi mix feeder A according to the present invention.
The feeder A has four units 1 having substantially the same configuration.
(1a, 1b, 1c, 1d).

In the above unit 1, the gear box 2
Two parallel shafts 3 and 3 are rotatably supported on the shaft 3 and have the same number of teeth attached to the shafts 3 and 3, respectively.
Gears 4 and 4 having the same diameter are meshed with each other. A motor 5 is fixed to the gear box 2 and the motor 5
A drive gear 6 attached to a drive shaft (not shown) meshes with the one gear 4, and the shafts 3 rotate in opposite directions (arrows a and a'directions) based on the drive of the motor 5. I am doing it.

A paddle 7 formed by connecting four unit paddles 8 is externally fitted to the portion of the shafts 3, 3 protruding from the front portion of the gear box 2 in a non-rotating state. Are rotated in the directions of arrows a and a ', respectively, so that the paddles 7 of the first-stage (lowermost) unit 1a and the third-stage unit 1c are
a and 7c exhibit the transportability in the direction of the arrow X ', and the paddle 7 of the second-stage unit 1b and the fourth-stage (uppermost) unit 1d
b and 7d are designed to exhibit the transportability in the opposite direction, that is, the arrow X direction.

As shown in FIG. 2, the unit paddle 8a of the first stage has blades 82a having axial transportability on the outer peripheral surface of the cylindrical main body 81a at equal intervals in the circumferential direction and at the front and rear sides.
In addition to arranging in rows, the protrusions 82a 'in the front row and the protrusions 82a''in the rear row are displaced from each other by a predetermined angle, and the protrusions 82a' in the front row and the protrusions 82a '' in the rear row are aligned in a straight line. It is arranged in three. In the unit paddle 8b of the second stage, the main body 81b is formed in a substantially hexagonal shape, and the blade 82b is twisted to impart the transportability in the axial direction. Are arranged in. The unit paddle 8c in the third stage is the main body 81
c is formed in a substantially triangular shape, and the second unit paddle 8b
Similarly, the blades 82c are twisted so as to be provided with an axial transport property, and the blades 82c are arranged on the shaft while being shifted by a predetermined angle. The fourth-stage unit paddle 8d is configured by spirally providing blades 82d on the outer peripheral surface of a cylindrical main body 81d, and the blades 82d are arranged on the shafts 3, 3 so as to be continuously connected.

Returning to FIG. 1, in the unit housing 9 for accommodating the paddle 7, two cylindrical spaces having a diameter slightly larger than the outer diameter of the block 8 are bored from the rear end face thereof in a communicating state and the kneading space is formed. The transport path 10 is formed. Also,
A supply port 11 and a discharge port 12 communicating with the transport path 10 are formed in the upper and lower parts of the unit housing 9, respectively, and in the front part of the unit housing 9, bearing through holes 13, 13 coaxial with the cylindrical space and these are formed. An air vent hole 14 is formed between the through holes 13 and 13. The unit housings 9a, 9 of the first-stage unit 1a and the third-stage unit 1c
In c, the upper supply port 11 is arranged in the front part and the lower discharge port 12 is arranged in the rear part, and the second stage unit 1b and the fourth stage unit 1 are arranged.
In the unit housings 9b and 9d of d, the upper supply port 11 is arranged in the rear part and the lower discharge port 12 is arranged in the front part.

Then, the unit 1 (1a, 1b,
1c, 1d), the shafts 3, 3 having the paddles 7, 7 are inserted into the transport path 10 of the unit housing 9 and the shafts 3,
The front part of 3 is inserted into the bearing through holes 13, 13 and the gear box 2 and the unit housing 9 are integrally fixed. In addition, these units 1 (1a, 1b, 1c, 1
d) is connected to the discharge port 12 of the upper unit and the supply port 11 of the lower unit, which are adjacent to each other, and is integrally fixed by a connecting means (not shown) to form a multi mix feeder A.
And the unit housing 9 of each stage is combined to form the entire housing 15.

The operation of the multi-mix feeder A configured as above will be described. In the description, reference numerals of parts corresponding to the respective units 1a, 1b, 1c, 1d are appropriately assigned reference numerals of a, b, c, d to distinguish them. First, each unit 1 (1a, 1b, 1c, 1
When the motor 5 of d) is driven, the units 1a,
The shafts 3, 3 and the paddles 7, 7 of 1b, 1c, 1d rotate in the directions of arrows a, a '. And the fourth stage unit 1d
The material such as rubber supplied from the supply port 11d to the conveying path 10d is kneaded while being conveyed in the arrow X direction based on the rotation of the paddles 7d and 7d, and the fourth stage discharge port 12d and the third stage supply port 11c. It is sent to the conveyance path 10c of the third stage unit 1c via. Further, the material supplied to the third-stage conveying path 10c is kneaded while being conveyed in the direction of the arrow X ', and is conveyed to the second-stage unit 1b via the third-stage discharging port 12c and the second-stage supplying port 11b. It is sent to 10b. Further, the material supplied to the conveying path 10b of the second stage unit 1b is kneaded while being conveyed in the arrow X direction,
It is fed into the first-stage transport path 10a via the second-stage discharge port 12b and the first-stage supply port 11a. Then, the material supplied to the first-stage transport path 10a is finally kneaded while being transported in the direction of the arrow X ', and is discharged to the outside of the machine through the first-stage discharge port 12a.

Each unit 1a, 1b, 1c, 1d
The number of rotations of the shafts 3 and 3 can be adjusted individually according to the type of material, the finished state, and the like.

Unit paddles 8a, 8b, 8c, 8d of each stage
Since each has a different shape, each unit 1
The transportability and kneading property for the materials a, 1b, 1c and 1d are also different. Specifically, the unit paddle 8d in the fourth row is the main body 81
It is equipped with continuous blades 82d around d, and the supply port 1
The material supplied from 1d is positively pushed and pressed into the inside of the transport path 10d. Further, the unit paddle 8c in the third stage has a small number of blades 82c, and the material conveyed through the conveying path 10c is kneaded relatively coarsely. Further, the second-stage unit paddle 8b has a larger number of blades 82b than the third-stage unit paddle 8c, and the material conveyed through the conveying path 10b is relatively finely kneaded. And the unit paddle 8a of the first stage
The blades 82a ', 82 in the front and rear two rows at equal intervals in the circumferential direction.
a ”, and their wings 82a ′, 8
Since 2a '' is projected from the outer periphery of the cylindrical main body 81a to have high kneading property and transportability, the material transported through the transport path 10a is forcibly extruded from the discharge port 12a while being further finely kneaded. That is, the material is supplied by the fourth paddle 8d, the material is kneaded by the third, second and first paddles 8c, 8b and 8a, and the material is extruded by the first paddle 8a. Is secured.

The vent mechanism of the multi mix feeder A is preferably provided at a location where the material conveying speed increases. For example, the material transfer speed V3 of the third stage unit
Is faster than the material conveying speed V4 of the fourth stage unit (V3> V4), the air vent hole 14d of the unit housing 9d of the fourth stage or the air vent hole 14c of the unit housing 9c of the third stage is vacuumed (see FIG. (Not shown) to suck air in the material. The air vent holes may be provided at the front, rear, upper and lower parts of the unit housing 9 at each stage, and the air vent holes at necessary locations may be connected to the vacuum device.
Further, the air suction amount is set to the most efficient state while adjusting the rotation speed of the paddle 7 with the motor 5.

The heating / cooling mechanism of the multi-mix feeder A may be one in which heating / cooling pipes are arranged around the housing 15, or a passage for medium conveyance in the housing portion located around the conveyance path 10. May be provided, and a medium may be caused to flow through this passage to heat or cool the material. The above passages may be independent in each unit housing 9, or may have a structure that can be connected by combining the unit housings 9.

The above-mentioned multi mix feeder A
Then, the four unit housings 9 are combined to form the entire housing 15, but the present invention is not limited to this, and the housing 15 may be formed by processing a single member,
A partition wall or the like may be inserted inside the box-shaped body.

In addition, the conveying path 10 of each stage has two
Although the book paddles 7 are arranged, the present invention is not limited to this. That is, one may be arranged in each stage of the conveying path, three or more paddles may be provided, or the number of paddles arranged in each stage may be different, for example, in the first and fourth stages. It is also possible to arrange two lines, three lines in the second line and three lines in the third line.

Further, in the above embodiment, the paddles 7 of each stage are
Although the unit paddles 8 having the same shape are connected to each other, the unit paddles having different shapes may be combined. For example, the unit paddle near the supply port and the discharge port may use a unit paddle with excellent transportability, and the intermediate unit paddle may have a high kneading property. The optimum one may be selected in consideration of various conditions such as the property, the transportability, and the air suction property.

Furthermore, in the above embodiment, the paddle 7 is configured by connecting a plurality of unit paddles 8.
These paddles 7 may be made of a single material, as shown in FIG.
As shown in, the paddles 71a, 71b, 71c of the respective stages may be configured by a single unit paddle. Further, as shown in FIG. 3, when the paddles 71a, 71b, 71c are formed by a single unit paddle, even if the communication ports (supply port and discharge port) that connect each stage kneading space are arranged on the same straight line. Alternatively, as in the above-mentioned embodiment, the communication ports may be arranged so as to alternate front and back.

Further, in the above embodiment, the motor 5 is provided in each unit 1 of each stage.
As shown in, the shaft 1 of the drive gear 6 in each unit 1
6a, 16b, 16c, 16d with wheels 17a, 17
b, 17c, 17d may be provided, respectively, and these may be drivingly connected to the motor 19 by one sprocket 18. In this case, each wheel 17a, 17b, 17
By changing the number of teeth of c and 17d, each paddle 7
The rotational speeds of a, 7b, 7c and 7d can be freely adjusted.

Further, in the above embodiment, the material supplied from the one end supply port 11 of each unit housing 9 is simply discharged from the other end discharge port 12, but a separate circulation path is provided in parallel with the conveyance path 10. A part of the material may be sent back from the discharge side to the supply side through this circulation path. By doing so, the kneading properties of the materials are significantly improved. In addition,
A conveying means such as a paddle may be provided in the circulation path, and if the material can be pressure-conveyed, the conveying means is unnecessary.

Further, in the above embodiment, the gear box 2
The housing 9 and the housing 9 are arranged adjacent to each other. However, the space between the gearbox 2 and the housing 9 is provided in a space or a heat insulating member, and the rotational force of the gear in the gearbox 2 is transmitted to the paddle 7 via a coupling or a universal joint. You may do so. With this configuration, even if the material is heated or cooled through the housing 9, the heat is not transmitted to the gear box 2 and the lubricating oil of the gear box 2 can be maintained at the normal temperature state, and the drive system The trouble of can be solved.

In the above description, the case where the multi-mix feeder of the present invention is used as a kneading device for a plastic material such as rubber has been described. However, the material is not limited to rubber and any kind of material can be used. It can be applied to molding materials. Further, the material is not limited to the plastic material, and it can be used as a feeder for pulverizing and supplying granular materials such as foods and chemicals.

Next, the above-mentioned multi mix feeder A
An application example of will be described. FIG. 5 shows a strip-shaped body coating device 20 for a cylindrical substrate, which coats the outer circumference of the cylindrical substrate with rubber. In this figure, two base body supporting devices 21 and 21 arranged in parallel at a predetermined interval are a base 22 and a base 22.
Two support bases 23 and 24 fixed on the base 2 are provided, and bearing portions 25 and 26 of these support bases 23 and 24 are provided.
The both ends of the cylindrical substrate 27 are held by the motor, and the cylindrical substrate 27 is rotated by a motor 28 attached to one of the supporting bases 24.

The traveling device 29 includes the base supporting device 21,
Two guide rails 31, 31 parallel to the cylindrical base 27 are provided on the traveling base 30 provided between the two.
And a screw shaft 32 positioned between the guide rails 31 and 31, and the screw shaft 32 is drivingly connected to the motor 33.

The traveling carriage 34 includes the guide rails 31 and 3 described above.
1, the screw shaft 32 is screwed into a screw hole 35 formed in the bottom, and when the screw shaft 32 is rotated based on the driving of the motor 33, the traveling carriage 34 moves the guide rail 3
It is arranged to move in the direction of arrow Y or Y ′ along 1, 31. A support base 36 is fixed to the traveling carriage 34, and a bracket 37 having the multi-mix feeder A of the present invention is mounted on the support base 36 so as to rotate along a horizontal plane under the drive of a motor 38. There is.

Below the multi-mix feeder A, the strip forming device 3 supported by the bracket 37 is provided.
9 and a coating device 42 are provided. This molding device 39 is
Roller pair 41 arranged horizontally and this roller pair 4
1 and a motor 40 that rotates 1. Further, the coating device 42 includes two cylinders 43 arranged vertically on both sides of the roller pair 41, and a coating roller 44 supported by a shaft parallel to the roller pair 41 on each piston rod. It is provided.

In the band-shaped body coating device 20 having the above-mentioned structure, the plastic material such as rubber supplied from the uppermost unit supply port 11 of the multi-mix feeder A is kneaded and then discharged from the lowermost unit discharge port 12 to be molded. It is supplied to the device 39. In the molding device 39, the kneaded plastic material is rolled to form a band-shaped body 45 having a predetermined size, which is supplied to the roller 44 of the coating device 42.

On the other hand, in the traveling device 29, the traveling carriage 34 moves in the direction of the arrow Y or Y ′ based on the drive of the motor 33, and the covering roller 44 causes the base support device 21 to move.
The outer peripheral surface of the cylindrical base body 27 supported by is moved in the arrow Y or Y ′ direction, and the strip-shaped body 45 supplied from the molding device 39 is attached to the outer peripheral surface of the cylindrical base body 27. The coating pressure is adjusted by the cylinder 43. Then, when the coating of the strips of each row is completed, the cylindrical substrate 27 is rotated by a predetermined angle by the motor 28 of the substrate supporting device 21, and the coating of the strips of the next adjacent row is performed.

As described above, one substrate supporting device 21
When the coating process of the band-shaped body of the cylindrical substrate 27 supported by the bracket is completed, the bracket 37 rotates 180 ° by the driving of the motor 38, and the band-shaped body of the cylindrical substrate 27 supported by the substrate supporting device 21 on the opposite side. Execute the coating process. Further, during the band-shaped body covering process, the other substrate supporting device 2
The cylindrical base body 27 of No. 1 is replaced with a new cylindrical base body 27 which is not covered with a band.

[0036]

As is apparent from the above description, in the multi-mix feeder according to the present invention, the kneading spaces are formed in multiple stages, and the materials are kneaded in the kneading spaces of each stage. Even if the paddle length of each stage is shortened, the required paddle length can be secured by increasing the number of stages. Therefore, the length of the multi-mix feeder in the paddle axial direction becomes extremely short, and the area occupied by the extruder can be reduced.

Further, since the paddles of each stage can be driven by individual motors, a low-capacity general-purpose machine can be used as each motor, and such a general-purpose machine can be easily obtained. Therefore, a spare motor becomes unnecessary.

Further, the paddle shape and the number of paddles at each stage can be freely selected, and the most suitable kneading property can be secured according to the type of material and the like.

Furthermore, since the paddle is shortened, it is easy to manufacture the paddle, and even if the paddle is damaged, it is sufficient to replace only the paddle at the relevant portion, so that the cost and labor required for repair can be reduced and the maintenance can be reduced. Will be easier.

Further, by changing the paddle rotation speed, paddle shape, paddle number, etc. of each stage, the material conveying speed of each stage can be freely adjusted, and optimum conditions for air bleeding can be obtained.

Next, if the multi-mix feeder is composed of a plurality of divided units, the necessary paddle length can be easily secured by adjusting the number of stages of the units, and the multi-mix feeder Disassembly,
Easier to clean, assemble, and replace parts.

Next, if the paddle is composed of a plurality of unit paddles, the paddles can be easily and inexpensively repaired, and by combining different types of unit paddles, the material can be conveyed in one conveying path. Properties and kneading properties can be appropriately changed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a multi-mix feeder.

FIG. 2 is a perspective view showing an assembled state of a paddle.

FIG. 3 is a perspective view showing a schematic configuration of another embodiment of the multi-mix feeder.

FIG. 4 is a rear view showing another embodiment of the drive system.

FIG. 5 is a perspective view of a cylindrical substrate coating apparatus.

[Explanation of symbols]

A ... Multi mix feeder, 1 (1a, 1b, 1
c, 1d) ... Unit, 3 ... Shaft, 7 ... Paddle, 8 ... Unit paddle, 9 ... Unit housing, 10 ... Transport path, 11 ... Supply port, 12 ... Discharge port, 15 ... Housing.

Claims (4)

[Claims] 1. A kneading space having a supply port and a discharge port is vertically arranged in multiple stages, and adjacent upper and lower kneading spaces are connected to each other through a discharge port of the upper mixing space and a supply port of the lower mixing space to form a housing. At least one paddle is provided in each of the kneading spaces, each of the paddles at each stage is connected to a drive source, and the material supplied from the supply port is kneaded and discharged to the discharge port. Characteristic multi-mix feeder. 2. The multi-mix according to claim 1, wherein the housing is formed by combining a plurality of unit housings each having a kneading space.
feeder. 3. The multi mix feeder according to claim 1, wherein an air vent hole is provided in the vicinity of the connecting portion between the discharge port and the supply port. 4. The multi-mix feeder according to claim 1, wherein the paddle is composed of a plurality of unit paddles.