JP2001070774A - Raw material feeding/mixing method, hopper device for raw material feeding/mixing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hopper for feeding raw materials to be mixed which is capable of feeding and mixing a fixed amount of auxiliary raw materials in the hopper at the same time where chief raw materials have already been fed and stored. SOLUTION: In feeding chief raw materials and auxiliary raw materials via a hopper for feeding raw materials which is connected with and penetrated into a tubular body 5 having kneading/delivering screw 51 built-in so that may be free to rotate, a flow distribution is exhibited within the hopper due to the difference of flow of the chief raw materials (s1) occurred in a connecting and penetrating parts by driving the kneading/delivering screw 51. The flow at the area of the late flow among the flow distribution is compulsorily stopped by flapping a flapper (2) which is installed within the hopper 1, and the chief raw materials s1 at the area of the fast flow is caused to flow down fast and then the auxiliary raw materials s2 is fed thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed material supply method and a mixed material supply hopper. More specifically, the present invention relates to a mixed material supply method suitable for an extruder and an inflation device, and a mixed material supply hopper that executes the method.

[0002]

2. Description of the Related Art A molding apparatus such as an extrusion molding or an inflation molding has a device section for heating, kneading, melting and sending out a powdery raw material. It mainly comprises a raw material delivery screw rotatably inserted into the heating cylinder, a driving unit for driving the screw to rotate, and a raw material charging hopper connected to a raw material charging port of the heating cylinder.

[0003] In the above-mentioned molding, molding is rarely performed using only one kind of raw material, and usually, two or more kinds of raw materials are mixed and used. In this case, as a method of mixing the raw materials, for example, as shown in Japanese Patent Application Laid-Open No. 07-101525, a sub-material for supplying a sub-material by rotating a coil spring or the like is supplied to a material input hopper for supplying and storing the main material. It is proposed by the present inventor to attach a raw material delivery section.

However, in such a secondary material supply by the secondary material delivery section attached to the material input hopper, since the flow rate and the filling pressure of the primary material already supplied and stored in the hopper are large, the primary material is not supplied. It is very difficult to feed a predetermined amount of auxiliary material into the raw material at one time.

[0005] Apart from the above-mentioned problem, the powdery raw material generally supplied and stored in the above-mentioned raw material input hopper is liable to form a bridge and thereby to be easily clogged. Therefore, in order to solve this, vibration is given to the hopper,
BACKGROUND ART Mechanical stirring is performed in a hopper, and baffles and flappers are provided in a hopper.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a mixed raw material supply method and a mixed raw material supply method capable of simultaneously charging and mixing a predetermined amount of auxiliary raw material into a hopper in which a main raw material is already supplied and stored. Hopper to provide.

[0007]

Thus, according to the invention of claim 1 of the present application, "the kneading / delivery screw (51) rotatably inserted and connected to the cylindrical body (5) is connected and connected. A main raw material (s1) and a sub raw material (s2) through a raw material supply hopper (A1), wherein the main raw material (s) generated in the communication connection portion by driving the kneading / delivery screw (51).
In the flow distribution that appears in the hopper due to the flow difference in 1), the flow in the slow flow area (b) is forcibly prevented and the auxiliary material (s2) is supplied to the fast flow area (b) Material supply method ".

[0008] The present invention also provides a kneading / delivery screw (5) rotatably inserted.
A hopper device provided in a cylindrical body (5) containing 1) and for supplying a main raw material (s1) and an auxiliary raw material (s2) into the cylindrical body (5),
Due to the difference in the flow state of the main material (s1) generated in the communication connection part by the driving of the hopper part (1) connected to the cylinder body (5) and the kneading / delivery screw (51). Hopper section
(1) The hopper is swingable so as to separate the fast flowing area (a) and the slow flowing area (b) of the flow distribution appearing in (1).
(1) a partition plate (2) provided therein, and an auxiliary material connected to the hopper portion (1) so as to be able to supply the auxiliary material to a region (a) having a high flow rate divided by the partition plate (2). And a feeder / mixing hopper device (A1) comprising a feeder device (4) ".

A hopper device (A1) for supplying and mixing raw materials according to the present invention.
In the present invention, as shown in claim 3 of the present application, the partition plate (2)
Into the communication leg (11) of the hopper (1) consisting of a small-diameter communication leg (11) connected to the cylindrical body (5) and a large-diameter trunk (10) connected to the small-diameter communication leg (11). In addition, the lower end thereof is brought into contact with or close to the kneading / delivery screw (5), while the auxiliary material supply device (3) is connected to the communication leg (11) of the hopper (1) and the supply device (3). )), The partition plate (2) is preferably connected to a position where the partition plate (2) can swing toward the slow flow region (b) by the auxiliary raw material (s2).

In the hopper device (A2) of the present invention, as described in claim 4 of the present application, the partition plate (2a) is swung so that it can be swung at a pre-programmed time. A configuration in which the means (2a7) and the swing control section (2a6) are additionally provided is also preferable.

According to the present invention, in the hopper section (1) in which the main raw material (s1) is supplied and stored in the hopper apparatus (A1) for supplying and mixing the raw material, a screw ( Due to the rotational drive of 51), a flow difference occurs in the communication connection portion of the hopper portion (1) to the cylinder (5), and due to this, a relatively fast flow region in the hopper portion (1). The flow distribution between (a) and the slow region (b) occurs.

Therefore, if the partition plate (2) is swung toward the region (b) where the flow is slow to block the flow, the region (a) where the flow is fast sends the raw material into the cylinder quickly. A large space can be configured, and if the auxiliary raw material (s2) is charged therein, a predetermined amount thereof can be supplied at a time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited thereto.

Embodiment 1 FIG. 1 is a schematic front view of a main part including a partial cross section of an extruder having one example of a raw material supply / mixing hopper apparatus of the present invention, and FIG. 2 mainly shows the hopper apparatus of FIG. FIG. 3 is a schematic cross-sectional view of a flapper mounting portion, and FIG. 4 is a schematic front view of a main portion illustrating the operation of the hopper device in FIG.

Referring to these figures, a hopper device (A1) for supplying and mixing raw materials includes a kneading / delivery screw (5).
A hopper (1) connected to a raw material input port of a heating cylinder (5) containing a 1), and a flapper (2) provided in the hopper (1),
It is mainly composed of an auxiliary raw material supply device (3) connected to the hopper (1). In the drawing, (V) denotes a kneading / delivery screw drive unit.

In the present embodiment, the hopper (1) is a normal hopper composed of a large-diameter hopper main body (10) and a small-diameter communication leg (11) connected thereto. (11) constitutes an adapter part which is detachably connected to both the hopper body part (10) and the raw material inlet of the heating cylinder (5).

As shown in FIGS. 1 and 3, the lower end of the flapper (2) in this embodiment is set to a size close to the kneading / delivery screw (51). It is attached to the communication leg (11) so as to be able to move forward and backward and swing freely.

That is, as shown in FIG. 3, the communication legs (1
It is fixed by communicating with the wall surface (111) of 1), and the internal thread is
An adjusting bar (22) in which a male screw portion (221) is screwed is screwed into a screw cylinder (21) in which (211) is screwed.
In the annular groove (222) recessed around the distal end of (2), the annular convex ridge (231a) of the attachment (23) having the cylindrical portion (231) having the annular convex ridge (231a) formed on the inner surface. The adjustment bar (22) is engaged with the attachment (23) and is rotatable. A ring (232) is formed at the lower end of the attachment (23).
The upper edge of (2) is linked, and the flapper (2) is swingably suspended from the attachment (23). Further, a nut (24) as a stopper is provided at the rear of the adjustment bar (22).
Is screwed.

Thus, by turning the adjusting bar (22) to either side, the adjusting bar (22) can be moved in the left-right direction in the drawing so that the adjusting bar (22) can move forward and backward. Can be adjusted.

The auxiliary raw material supply device (3) includes an outer cylinder (31), a screw (not shown) rotatably disposed in the outer cylinder (31), and a motor (32) for rotating the screw. ), A screw control unit (33) that drives and controls the motor (32) according to a predetermined program, and a secondary material hopper (34) connected to the outer cylindrical body (31). The distal end of the outer cylindrical body (31) is inserted into and fixed to the communication leg (11) of the hopper (1). In addition, this insertion fixation
The wall (111) of the communication leg (11) on the upstream side in the moving direction of the raw material accompanying the driving of the kneading / delivery screw (51) in (5) is formed.

In the extruder having the hopper device (A1) configured as described above, with reference to FIGS.
With the delivery screw (51) rotated, the main raw material (s1)
Is supplied into the hopper (1), the main raw material (s1) is introduced into the heating cylinder (5) by the screw (51), melted and kneaded, and sent out.

At this time, the flow state of the raw material at the outlet of the hopper (1) connected to the raw material input port of the heating cylinder (5) depends on the direction in which the raw material is fed into the heating cylinder (5) (see FIG. 2). The flow distribution is such that the flow is fast on the upstream side (shown by an arrow) (a) and slow on the downstream side (b).

In such a state, the auxiliary material supply device
When (3) is operated, the auxiliary material (s2) is sent out from the tip of the outer cylindrical body (31) with the rotation of a screw (not shown), and the flapper (2) is sent out by the auxiliary material (s2) sent at this time. ) Is swung downstream.

Due to the swing of the flapper (2) to the downstream side, the flow of the main raw material (s1) on the downstream side in the hopper (1) is prevented, but the main raw material (s1) on the upstream side is prevented. s1) is introduced into the heating cylinder (5), where a space is formed. Then, the auxiliary material (s2) is charged into this space (see FIG. 4).

In this way, the auxiliary material (s2) is converted into the main material (s2).
The entire predetermined amount can be supplied into the hopper (1) at a time without being obstructed by the flow of (1). Also, as shown in FIG. 4, since the main raw material (s1) slightly falls from the upper part of the flapper (2) that has been swung through the space, the added auxiliary raw material (s2) is It is extruded by the main raw material (s1) that falls and is completely mixed with the main raw material (s1) without being clogged.

As described above, the hopper device of the present embodiment
In (A1), the auxiliary material (s2) at a predetermined ratio to the main material (s1)
Is mixed and kneaded in the heating cylinder (5).

[Second Embodiment] This embodiment is the same as the first embodiment except that the flapper is changed as described below in the hopper device of the first embodiment. Therefore, the same components as those of the first embodiment are the same. Numbers are assigned, and descriptions thereof are omitted.

Referring to FIG. 5, the flapper (2a) in the raw material supply / mixing hopper device (A2) of the present embodiment has a swing shaft mounted on a communication leg (11) of the hopper (1). (2a1) has its upper end fixed. Therefore, it is configured such that it cannot move in the left-right direction in FIG. Both ends of the swing shaft (2a1) protrude outside the communication leg (1), and a stopper (2a2) is provided at each end.

Therefore, in the hopper device (A2) of the present embodiment, the lower end portion of the flapper (2) is driven by the auxiliary material (s2) delivered from the tip of the outer cylindrical body (31) by the operation of the auxiliary material supply device (3). Is swung to the downstream side, so that a predetermined amount of the auxiliary material (s2) can be added to the space of the main material (s1) in the same manner as in the first embodiment.

[Embodiment 3] This embodiment is different from the hopper device of Embodiment 2 except that a flapper swinging means is provided.
Is similar to Therefore, the same components as those of the second embodiment are denoted by the same reference numerals, and description thereof is omitted.

That is, as shown in FIGS. 6 and 7, in the hopper device (A3) of the present embodiment, a movable lever (2a3) is connected to one end of a swing shaft (2a1) in an L-shape. An air cylinder (2a4) is connected to the tip of the movable lever (2a3), and an air cylinder drive circuit (2a5) for flowing air into and out of the air cylinder (2a4) and this drive circuit (2a5) Is connected to an air cylinder control unit (2a6) that controls the pressure by a predetermined program. Therefore, the movable lever (2a3), the air cylinder (2a4), and the air cylinder drive circuit (2a5) constitute a flapper swinging means (2a7).

The flapper rocking means is not limited to the above-described configuration. For example, a gear fixed to one end of a rocking shaft, a screw gear meshing with the gear, a servomotor for rotating this screw gear forward and reverse, and It may be configured with a control unit that commands the servo motor to perform a predetermined rotation operation, or may be configured to manually control the rotation of the servo motor.

The screw control section of the auxiliary material supply device (3)
(33) is cooperated with the air cylinder control section (2a6), and is configured so that when the flapper (2a) is driven in a predetermined direction, the screw can be driven to supply a predetermined amount of auxiliary material. I have.

The operation of the raw material supply / mixing hopper device (A3) configured as described above will be described. First, in the same manner as in the first embodiment, in a state where the main raw material already supplied and stored in the hopper (1) is introduced into the heating cylinder,
When the control program reaches the step of adding a predetermined amount of the sub-material to the main material, the flapper rocking means (2a7) is operated.

That is, when the air cylinder controller (2a6) instructs the air cylinder drive circuit (2a5) to operate, the movable lever (2a3) is pulled, and the flapper (2a) jumps up to the swinging side.

Then, as in the first embodiment, the flow of the main raw material on the side where the flapper (2a) is jumped up is substantially prevented, and the flow of the main raw material is advanced in the area on the opposite side. Thus, a space is formed here.

Next, the screw control section (33) of the auxiliary raw material supply device (3) drives the motor (32) for a predetermined time according to a program so that a predetermined amount of auxiliary raw material is supplied into the hopper (1). However, at this time, the auxiliary material is charged into the space configured as described above, and the entire predetermined amount is added to the main material very smoothly.

Next, according to the program, at the same time when the supply of the predetermined amount of the sub-material is completed, the driving of the sub-material supply device (3) is stopped, and after a predetermined time has elapsed, the flapper rocking means (2a7) is operated and the flapper (2) is operated. 2a) is returned to the original position.

Thus, the added auxiliary material is introduced into the heating cylinder together with the main material, where it is heated, melted, kneaded, uniformly mixed, and then extruded.

As described above, according to the hopper device (A3) of the present invention, a predetermined amount of auxiliary material can be automatically added and mixed into the main material automatically according to a preset program. Extrusion molding can be performed with a raw material having a predetermined mixing ratio.

[Embodiment 4] The hopper device (A4) for supplying and mixing the raw material of this embodiment is the same as that of the third embodiment except that the auxiliary raw material supplying device is constituted as follows. The same components are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 8, the auxiliary raw material supply device (300) in this embodiment is substantially the same as the auxiliary raw material supply device of the second embodiment except that a rotary coil (301) is used instead of a screw. .

In the hopper device (A3) for supplying and mixing the raw material configured as described above, the same effect as in the second embodiment can be obtained, and the auxiliary raw material supplying device (300) can
Since it has 1), even if the raw material is soft and easily sticks due to static electricity or the like, such as color particles, a predetermined amount of the raw material can be accurately supplied to the main raw material, and the mixed raw material having a predetermined color is obtained. It can be extruded.

Fifth Embodiment As shown in FIGS. 9 to 13, the hopper device (A5) of the present embodiment changes the mounting position and the shape of the flapper as described below, as in the third embodiment. And the same as in Example 1 or 3, except that the mounting position of the auxiliary material supply device is changed as described below. Therefore, the same components as those in Example 1 or 3 are denoted by the same reference numerals. However, description of these will be omitted.

Referring to these drawings, the flapper (2b)
Is provided in the hopper body (10),
(3) is inserted and fixed to a tapered portion connected to the communication leg (11) of the hopper body (10).

As shown in FIG. 9, the screw (5
When the raw material delivery direction by the rotation of 1) is the left direction of the drawing, the lower right area (c) of the lower end outlet opening of the hopper (1) in FIG. Since it flows at the latest, the flapper (2b)
The upper end is fixed to a swing shaft (2a11) rotatably provided on the hopper body (10) from the upper right side to the lower left side in FIG. 9 so that (d) can be sorted.

The auxiliary raw material supply device (3) is connected to the region (c) where the flow is fast in the flow distribution in the hopper main body (10) which is substantially divided by the flapper (2b). .

Screw control section of the auxiliary material supply device (3)
(33) cooperates with the air cylinder controller (2a6) of the flapper rocking means (2a7), and drives a screw (not shown) when the flapper (2b) is driven in a predetermined direction to drive the auxiliary material. Can be supplied in a predetermined amount.

The operation of the raw material supply / mixing hopper device (A4) configured as described above will be described with reference to FIGS. First, when the screw (51) in the heating cylinder (5) is driven in a state where the main raw material (s1) is already supplied and stored in the hopper (1), the rotation of the screw (51) is accompanied. Hopper
The main raw material (s1) stored in (1) is introduced into the heating cylinder (5) through the lower end outlet opening of the hopper (1).

At this time, at the lower end outlet opening of the hopper (1), due to the raw material delivery direction determined by the rotation direction of the screw (51) shown in FIG. (C) is introduced into the outer cylinder (5) fastest, and the upper left area (d) of the outlet opening is the slowest introduction.

Next, when the control program reaches the step of adding a predetermined amount of the sub-material (s2) to the main material (s1), the flapper swinging means (2a7) is operated and the flapper (2b) is turned on as shown in FIG.
As shown in the figure, it is jumped to the region (d) side where the flow speed is slow.
Then, the flow of the main raw material (s1) in this region is substantially prevented, and the flow of the main raw material (s1) is advanced in the region (c) on the opposite side, and a space is formed in this region (c). Will be done.

At this time, the screw control section (33) of the auxiliary material supply device (3) drives the motor (32) for a predetermined time according to a program, and a predetermined amount of the auxiliary material (s2) is supplied into the hopper (1). As a result, the entire amount of the predetermined amount is very smoothly added to the main raw material (s1) (see FIG. 13).

Next, according to the program, the supply of the predetermined amount of the sub-material (s2) is completed, and at the same time, the driving of the sub-material supply device (3) is stopped.
7) is activated and the flapper (2b) returns to its original position (see Fig. 10).
Is returned to.

Thus, the added auxiliary material (s2) is introduced into the heating cylinder (5) together with the main material (s1), where it is heated, melted and kneaded, uniformly mixed, and then extruded. Becomes

As described above, according to the hopper device (A5) of the present invention, a predetermined amount of the sub-material (s2) can be quickly added and mixed into the main material (s1), and a predetermined mixing ratio can be obtained. Extrusion molding with raw materials can be performed.

[0056]

According to the present invention, the space can be provided in the main raw material by the partition plate provided in the hopper by utilizing the flow distribution of the main raw material generated in the hopper. Since the auxiliary material is charged, the entire amount of the auxiliary material can be quickly supplied to the main material, and a mixed material mixed at a predetermined ratio can be obtained.

Therefore, the properties, materials, and the like of the mixed raw materials determined by the mixing ratio of the main raw materials and the auxiliary raw materials can be adjusted as predetermined, and a molded product having predetermined characteristics can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a main part of an extruder using a first embodiment of a hopper device for feeding and mixing raw materials according to the present invention.

FIG. 2 is a schematic plan view centering on the hopper device in FIG. 1;

FIG. 3 is a structural explanatory view of a mounting structure of a flapper to a hopper portion.

FIG. 4 is a structural explanatory view illustrating a method of the present invention.

FIG. 5 is an explanatory view of the configuration of a second embodiment of the raw material supply / mixing hopper device of the present invention.

FIG. 6 is an explanatory view of the configuration of a third embodiment of the raw material supply / mixing hopper device of the present invention.

FIG. 7 is a configuration explanatory view of a mounting portion of a flapper in the hopper device of FIG. 6;

FIG. 8 is a view corresponding to FIG. 6 of a fourth embodiment of the raw material supply / mixing hopper apparatus of the present invention.

FIG. 9 is a structural explanatory view of a fifth embodiment of the raw material supply / mixing hopper device of the present invention.

FIG. 10 is a configuration explanatory view illustrating mounting of a flapper in the hopper device of FIG. 9;

11 is a configuration explanatory view illustrating a shape of a flapper in the hopper device of FIG. 9;

FIG. 12 is a configuration explanatory view showing a state in which the flapper in the hopper device of FIG. 9 is swung.

FIG. 13 is a structural explanatory view for explaining the operation of the hopper device of FIG. 9;

[Explanation of symbols]

 (A1) (A2) (A3) (A4) (A5) ... hopper device for raw material supply and mixing (1) ... hopper section (2) (2a) (2b) ... flapper (3) (300) ... auxiliary material supply Equipment (5) Heating cylinder (10) Hopper body (11) Communication leg (21) Screw cylinder (22) Adjustment bar (23) Attachment (24) Nut for stopper (31) Outer cylinder Body (32)… Motor (33)… Screw control part (34)… Sub-material hopper (51)… Kneading / delivery screw (2a1) (2a11)… Oscillating shaft (2a3)… Movable lever (2a4)… Air cylinder (2a5): Air cylinder drive circuit (2a6): Air cylinder control unit (2a7): Flapper swing means

Claims (4)

[Claims] 1. A method for supplying a main raw material and an auxiliary raw material through a raw material supply hopper which is connected to a cylindrical body containing a kneading / delivery screw rotatably inserted therein, wherein the kneading / delivery screw is provided. In the flow distribution appearing in the hopper due to the difference in the flow of the main raw material generated in the communication connection portion due to the driving of the hopper, the flow in the region where the flow is slow is forcibly blocked, and the auxiliary flow is placed in the region where the flow is fast. A raw material supply / mixing method characterized by supplying a raw material. 2. A hopper device provided in a cylinder containing a kneading / delivery screw rotatably inserted therein and for supplying a main material and an auxiliary material into the cylinder, wherein the hopper is connected to the cylinder and is connected to the hopper. A hopper portion, and a flow distribution region that appears in the hopper portion due to a difference in the flow state of the main raw material generated in the communication connection portion due to the driving of the kneading / delivery screw. A raw material comprising: a partition plate swingably provided in the hopper portion so as to divide the raw material; and a sub raw material supply device connected to the hopper portion so as to be able to supply the sub raw material to the fast flowing region divided by the partition plate. Hopper for feeding and mixing. 3. A partition plate is provided in the communication leg of a hopper portion comprising a small-diameter communication leg connected to the cylindrical body and a large-diameter body connected thereto, and a lower end thereof is kneaded and fed. The auxiliary raw material supply device is connected to the communication leg of the hopper section and a position where the partition plate can be swung to the region where the flow is slow by the auxiliary raw material sent from the supply device. The hopper device for supplying and mixing raw materials according to claim 2, wherein the hopper device is provided. 4. A hopper for feeding and mixing raw materials according to claim 2, wherein a swinging means for swinging the partitioning plate and a swinging control unit for controlling the operation of the swinging means are attached to the partition plate. apparatus.