JP3388607B2 - Automatic granule feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine and an extrusion molding machine.
About the technology of molding plastics using
To supply granules, ie plastic masterbatch
Then, the particles (matrix) are added to the molding resin material (supplied to the molding machine).
Star batch) is a suitable device to mix uniformly
Related. 2. Description of the Related Art A masterbatch is formed on a granular material.
A general term for coloring agents, stabilizers, antistatic agents, or flame retardants.
You. And based on the type of plastic to be molded, etc.
The master batch seed mixed with the molding resin material
There are cases where the class must be changed. [0003] Such an automatic masterbatch supply device and
For example, it is described in Japanese Patent Publication No. 4-10407.
There is something like that. In this technique, a machine supplied from a hopper is used.
The amount of star batch corresponding to the molding unit of the molding machine (so-called
"One shot") only, spring feeder and air
The transport mechanism allows the mixing to be integrated with the air-material separation means.
Sent to the mixer and merges with the raw material supply
Linked with the one-shot molding resin material that moves in the
Mixed continuously. Here, the masterbatch is also molded resin
Since the material is the amount for one shot,
Mixing is achieved. [0005] However, Japanese Patent Publication No. Hei 4-4-1
According to the technology disclosed in Japanese Patent No. 0407, one shot of molding resin
One shot of master batch is mixed into the material
However, the master batch is evenly mixed into the molding resin material
There is no guarantee that Therefore, one-shot molding material
There are parts where a large amount of master batches are mixed
Star batch is divided into parts that are not mixed
There is fear. When such a situation occurs, the molded plastic
Questions such as uneven color or color difference in stick products
Problem. The technique disclosed in Japanese Patent Publication No. 4-10407 is disclosed.
Now, the time for spring feeder and pneumatic transportation
Since lag occurs, the material supply section of the molding machine
Supply of master batch and supply from hopper
It was difficult to match the timing of the above. The present invention has been made in view of the above-mentioned problems of the prior art.
Master batch (ie granules)
Which can be mixed uniformly in the molding resin material
The purpose is to provide an automatic body feeding device. Automatic supply of the granules (master batch) of the present invention
According to the feeding device, it is stored in the storage hopper (12).
And cut out a certain amount of granules (M) intermittently
By controlling the number of dispensing times, a predetermined amount of granules (M) can be supplied.
Provided below the storage hopper (12) for feeding
A supply amount control mechanism (14) and the supply amount control mechanism (1);
Using the blower (36), the granules (M) supplied from 4)
Pneumatic transport means (24) for suction
(36) is a machine of the molding machine (50) to which the granules (M) are supplied.
In conjunction with the operation of the screw, on the molding machine (50)
The granules sent by the air transport means (24)
(M) and air separating means (28) are provided.
Molding resin material supplied to the molding machine (50)
Particles separated from air by the separation means (28) to the material (12)
A particle mixing means (30) for uniformly mixing (M) is provided.
The granule mixing means (30) is provided with the separating means (28).
Supply granules for cutting out the granules (M) separated in
Gate valve (34) and the supply gate valve (34).
And a supply gate valve driving means (38) for performing operation.
The granules cut out by the supply gate valve (34) are
Particles to be joined to the raw material supply section (52) of the shaped resin material (K)
Body supply passage (48), and the supply amount control resin (1)
4) and controlling the supply gate valve driving means (38).
Control unit (CU). In carrying out the present invention, a supply amount control mechanism is provided.
The weight of the granules fed through is weighed and the density of the granules
Weight measuring hand to calculate (bulk density or apparent density)
Intermediate stages between feed control and pneumatic transport
Is preferred. Here, the weight measuring means is a supply amount controller.
Weight or mechanical for construction and pneumatic transport
Are separated, but no particles leak out
It is preferred that it is configured in such a way. In addition, the granular material supply passage and the raw material supply unit are
A mixer is located downstream (on the molding machine side) of the point where
May be provided. Further, in carrying out the present invention, the granular material (ma
A machine for cleaning the inside of the device when changing (Star Batch)
Preferably, a frame is provided. And with such a cleaning mechanism
For example, a high-pressure air inlet is installed at a suitable place in the device.
And the introduced high-pressure air is contaminated or particles remaining
High-pressure air outlet that removes air and is discharged outside the device
And it is preferable to introduce high-pressure air from a high-pressure air source.
New According to the present invention having the above-described structure,
For example, in the supply control mechanism, the stored granules (ma
Star batch) is cut out intermittently by a fixed amount,
Predetermined amount of granules can be accurately controlled by controlling the number of dispensing
Can be supplied. And using air transportation
To separate the supplied granules from the air used for transportation.
Then, the separated granules are sent to the granule mixing means. here,
The amount supplied by the supply amount control mechanism is referred to as a so-called "one-shot"
One shot by setting the amount to
The mixing ratio between the molding resin material and the granules is a predetermined value S.
I can do it. In the granule mixing means, the supply gate valve
And cut out the granules little by little, and through the granule supply passage
To mix the molding resin material and granules in the raw material supply section of the molding machine.
I agree. Here, by cutting small amounts,
The body is evenly dispersed in the molding resin material. That is, a grain
The body is supplied intermittently from the supply gate valve in small quantities
Is mixed with the molding resin material in the raw material supply section of the molding machine
At the time, compared to the prior art, the state where the granules are more dispersed
Therefore, it is mixed in the molding resin material. As a result,
Granularity with a degree of uniformity that technology can never achieve
(Master batch) is mixed with the molding resin material and
The uneven color and the color difference of the selected product are prevented. In practicing the present invention, the weight measuring means
If interposed between the supply control mechanism and the air transport mechanism,
Weigh the weight of granules supplied via the feed control mechanism
Thus, the density of the granules can be calculated. That is,
Measure the amount of granules (master batch) by volume and
Specific gravity (bulk specific gravity or apparent specific gravity) or density
Calculated using the calculated specific gravity or density
It is possible to precisely control the weight of the granules
You. Here, the amount of particles to be mixed into the molding resin material is
Determined by weight, but weighing is by volume
The control is very complicated compared to For it
Thus, in the present invention, the weight measurement
If a step is provided, the weighing of granules is based on a volume that is easy to control
The exact weight of the grain depends on its density.
The amount can be controlled. In other words, simple and accurate
It is possible to measure fine particles. Here, the weight measuring means is a supply amount control mechanism.
And pneumatically, mechanically or mechanically
Are separated, but no particles leak out
With such a configuration, the granules supplied by the weight measuring means
To measure the weight of the material and calculate its density
Measurement results vary depending on the state of the volume control mechanism and pneumatic transport mechanism.
Does not work. And the correct amount of granules is pneumatically transported.
Is guaranteed. Further, the granule supply passage and the raw material supply section are
A mixer is installed downstream (on the molding machine side) of the point where merging occurs.
If so, the granules and the molding resin material are further mixed by the mixer.
Mix well. As a result, color unevenness and color difference are further reduced.
You. Further, in carrying out the present invention, the granules (ma
A machine for cleaning the inside of the device when changing (Star Batch)
The cleaning mechanism is provided, for example, in a proper position in the apparatus.
High-pressure air inlet, high-pressure air outlet,
If configured with an air source, the introduced high-pressure air is contaminated.
And the remaining particles are removed and discharged to the outside of the apparatus. So
Therefore, when multiple raw material supply units are provided,
When replacing the star batch, remove the remaining master
Inconvenience caused by mixing of a new masterbatch
Is done. Daily maintenance is extremely easy
This is convenient. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Will be described. FIG. 1 shows an embodiment of the present invention.
Body (hereinafter referred to as "master batch" in the examples)
The automatic feeder is designated by reference numeral 10 as a whole.
You. In this device 10, the master batch M is stored
Stored in the hopper 12,
A supply amount control mechanism 14 is provided below. In addition,
Although not shown, a plurality of hoppers 12 are provided.
I have. The supply amount control mechanism 14 includes a disk 16 and its
A plurality of through-holes 18 formed in the peripheral portion;
6 for rotating the motor 6.
You. The disk 16 rotates, and one of the through holes 18 is
When aligned with the outlet 22 at the bottom of the par 12,
The masterbatch M is delivered via pneumatic transport via outlet 22
Fall to 24. Here, it is sent to the air transport means 24
The amount of the master batch M depends on the volume of the through hole 18 and the discharge amount.
As the product of the number of through-holes 18 passing over the mouth 22
Can be Since the volume of the through hole 18 is a constant,
The amount of master batch M required for one shot
It is precisely controlled by the amount of rotation. This control uses the signal
The control unit CU is transmitted via the transmission lines CL-1 and CL-2.
It is performed by Details of the control will be described later. In the air transport means 24, a predetermined amount of mass
Tar batch (master batch required for one shot)
When the signal accumulates in the storage unit 26, the signal is transmitted from the control unit CU to the signal transmission line.
Start suction to blower 36 via CL-5
Is output. Further, the signal transmission line CL-
4 outputs a control signal to open to the on-off valve V2.
Is done. When the on-off valve V2 opens in response to this, the blow
Negative pressure acts on the pneumatic transportation means 24 from the waist 36. Soshi
Then, the master batch M transfers the line L1 by the negative pressure.
Sent to the separation means 28 for separating the master batch M
To reach. The separating means 28 is located above the granule mixing means 30.
And transported via line L1.
The star batch M is separated and stored therein. one
On the other hand, the air used for transportation is on-off valve V2 (signal transmission line).
Receiving a release signal from the control unit CU via the CL-4
Through the exhaust line L2).
Then, it is discharged to the outside by the blower 36. What
Reference numeral 32 indicates a dust collecting filter. The supply gate valve 34 includes a cylinder 38 and the
A piston rod 40 which expands and contracts by a cylinder;
Of the thickness fixed to the tip (the left end in FIG. 1)
A plate (constituting a valve element) 42 and a plate 42
Through holes 44A and 44B.
The supply gate valve 34 has a bifurcated branch passage.
Are connected to the roads 46A and 46B.
Into a single passage 47 and joins the granule supply passage 48
You. Here, the cylinder 38, the piston rod 4
0, the control unit CU constitutes the supply gate valve driving means
You. Control device via signal transmission line CL-6
The piston 40 is extended by a control signal output from the CU.
The flat plate 42 is reciprocated linearly (in FIG. 1,
Reciprocates in the left-right direction). And the through hole 44A is
The position matching the branch passage 46A and the through hole 44B
The position matching the road 46B (the state shown) is alternately shifted.
Move. As is apparent from FIG. 1, the through hole 44B is divided.
When it comes to a position matching the branch passage 46B, the through hole 4
The master batch M stored in 4B is a branch passage 46B,
The original of the molding machine 50 is passed through the passage 47 and the fluid supply passage 48.
Tree formed in the feedstock supply section 52 and supplied there.
It is mixed with the fat material R. On the other hand, the through hole 44A is a branch passage.
When it comes to a position matching with 46A, the through-hole 44A,
Via the branch passage 46A, the passage 47, and the fluid supply passage 48
Thus, the path joining the raw material supply unit 52 of the molding machine 50 is
The master bar is formed and stored in the through hole 44A.
The switch M is mixed with the molding resin material R. In other words, the through holes 44A and 44B are branched.
Each time it is aligned with the passages 46A, 46B, the through hole 44A,
A master batch M equal to the volume of 44B is cut out
Is dispersed in the molding resin material R in the raw material supply unit 52,
They are mixed. And of the through holes 44A, 44B
By setting the volume appropriately, mass
Tar batch M can be mixed into molding resin material R
Because In FIG. 1, the supply gate valve 34 is a flat plate.
42 and through holes 44A and 44B,
Other configurations are possible. FIG. 2 shows another configuration of the supply gate.
To the separating means 28 and the passage 47.
A casing 56 formed with a connection port of
6 is rotated in the direction of the arrow CCW.
(A direction perpendicular to the plane) and a disk 58 formed on the disk.
The recesses 60A and 60B are formed. Referring again to FIG. 1, above the separating means 28
Is equipped with an on-off valve V3 for introducing high-pressure air for cleaning.
The on-off valve V3 is connected via a signal transmission line CL-7.
Receiving the control signal output from the control unit CU,
Perform opening and closing operation. The granule supply passage 48 is connected to the line L3.
Is in communication with Line L supplied from the separation means 28
3 passes through the cleaning dust collecting pot 72,
It reaches exhaust line L2 via valve V4,
Is discharged outside the equipment. The opening and closing operation of the on-off valve V4
Is controlled by the control unit CU via the signal transmission line CL-8.
Is controlled. FIG. 2 shows another embodiment of the present invention.
In this embodiment, the discharge amount is controlled via the supply amount control mechanism 14.
Measure the weight of the master batch M supplied from the outlet 22
Weight measuring means 76 is provided. Weight scale
The measuring means 76 is roughly composed of a weighing hopper 78 and a weighing scale 80.
It is configured. And the measurement result of the weighing scale 80 is a signal
Output to the control unit CU via the transmission line CL-10
You. Master batch stored in the weighing hopper 78
The volume of M is controlled by the supply amount control mechanism 14 with high accuracy.
Control, the weight is measured and the density is immediately
Is calculated. This allows the master batch to be handled
Is easily controlled. In other words, the weighing hand
The provision of the step 76 was conventionally very complicated.
Weight control becomes extremely easy. Here, the weighing hopper 78 has a compressed air source C
A, on-off valve V1, compressed air inlet 79, passage L1
In addition, a pneumatic transportation unit 24 is configured. However, weight measurement
In order to improve the accuracy of the weighing,
The upper 78 is provided with respect to the supply amount control mechanism 14 and the passage L1.
It is separated by weight or mechanically. Meanwhile, after weighing
For pneumatic transportation, the weighed master batch
M must not leak out of the system
No. The configuration to deal with such conflicting requirements is
This is indicated by 3-5. FIG. 3 shows that the weighing hopper 78 and the weighing scale 80 are connected to each other.
Not fixed and shown after weighing master batch M
Configured to lift the weighing hopper 78 by any means
An example is shown. In FIG. 3, the total of the passage L1 is measured.
At the end on the side of the quantity hopper 80, the outlet 7 of the weighing hopper 78 is provided.
Forming means 84 for facilitating connection with 8-O
The inner peripheral surface 84s of the means 84 is tapered.
Has been established. Due to this taper, means (not shown)
Even if the weighing hopper 78 is lifted, the outlet 78-O
Is exactly joined to the end of the passage L1. FIG. 4 shows that the weighing hopper 78 and the weighing scale 80 are fixed.
The outlet portion 78-O and the passage L1.
A minute gap δ is formed between the end and the end. This small gap
The interval δ is small enough that the master batch M does not leak.
Is the law. FIG. 5 shows that the minute gap δ in FIG.
This is an example in which it is not possible to connect
Are surrounded by bellows 86. Normally the left half in FIG.
As shown in the figure, the blower
When evacuated by 36, it is shown in the right half of FIG.
The bellows 86 comes into close contact with the outlet 78-O,
Keep her airtight. FIG. 6 shows another embodiment of the present invention.
You. This embodiment is different from the embodiment shown in FIG.
The path 48 is on the downstream side of the point where the raw material supply unit 52 merges.
A mixer 90 is provided on the (forming machine 50 side). this
By providing the mixer 90, the master batch M
The molding resin material R is further mixed well, and color unevenness and color difference are reduced.
Further decrease. The mixer 90 includes a mixing member 92 and its
And a drive member 94. Then, the driving member 94
Is controlled by the control unit CU via the signal transmission line CL-11.
Is controlled. Note that a configuration as shown in FIG.
No. FIG. 8 shows still another embodiment of the present invention.
All the components of the embodiment shown in FIGS. 1, 2 and 6 are provided.
This is an example. The master bar indicated by reference numeral 100 in FIG.
For details of the automatic supply device for the switch, also refer to FIGS.
explain. FIG. 9 shows the details of the control unit CU.
The control unit CU includes the operation switch 103, the control unit 104,
It has an arithmetic processing unit 106. And the supply amount control mechanism
The transmitter 102 (FIG. 8) interlocked with the drive motor 20 of FIG.
A signal converter 108 for receiving and converting a signal from
Counter that counts based on the signal output from the conversion unit 108
110, receives the signal from the weighing scale 80 and converts it into a weighed value
Weight conversion unit 112 to set, weight setting unit 1 to set the supply amount
14. A meter for supplying a uniform mixed material to the molding machine 50
Time setting unit 116 temporarily stores calculation result data, weighed values, etc.
A data storage unit 118 for storing is provided. The arithmetic processing unit 106 outputs
And the weight value from the weight conversion unit 53
Count weight calculation to calculate the weight per count
Calculation unit 120 and the weight and weight setting per count
Next time based on the weight set value from the section 114, the weighing motor
Predetermined count calculation unit that calculates the count value at which to stop
122. In addition, a predetermined
Count value and the current count from counter 110
The count to be sent when the values match by comparing the values
A match detection unit 124 is provided. Furthermore, weight conversion
Weight value from the unit 112 and the one-count weight calculating unit 120
From the weight per count calculated in
In the valve 34, the through holes 44A, 44B
A and 46B (hereinafter referred to as “supply times”).
Number) is provided.
Have been. In addition to this, the data calculated by
Based on the number of feedings and the weighing time from the weighing time setting unit 114,
The interval at which the cutout is performed at the supply gate valve 34
(Hereinafter referred to as “supply interval”)
A part 128 is provided. The control unit 104 operates from the operation switch 103
Signal, screw operation signal from the molding machine 50,
Receiving the signal from the processing unit 106,
Output start and stop signals via signal transmission line CL-2
Then, the cut-off operation of the supply gate valve 34 is turned ON / OFF.
Is output via the signal transmission line CL-6. Sa
In addition, the arithmetic processing unit 106 is connected via the bus CL-9.
To output a calculation execution command or a reset command. In addition,
Although not shown, the control unit 104
, The weighing hopper 78, the separating means 28,
When cleaning the passage L1 and the granular material supply passage 48, the blower 3
6 and control circuit for controlling the on-off valves V1-V4
Have been. Next, the operation of the embodiment shown in FIGS.
Will be described with reference to FIG. Here, for steady operation,
The description will be made as follows. When the operation switch 103 is turned on (step
Step S1), and read the weight set value D (step S1).
2) Read 1 count weight C in the previous routine
(Step S3) to calculate a predetermined count E
(Step S4). Next, the weight value B of the weight conversion unit 112
Is reset (step S5), and the counter 110 is reset.
(Step S6), and the metering motor 20 is driven.
(Step S7). The metering motor 20 rotates and the counter 110
Is increased in step S4 when the counter value A of
It is determined whether the count is equal to or greater than the predetermined count E (step
S8) When the counter value A reaches the predetermined count E (step S8).
If step S8 is YES, the motor 20 is stopped (step S8).
S9). Then, the time when the weight scale 80 is stabilized elapses.
Until it reaches (step S10), and after the elapse of the time
(Step S10 is YES), counter value A and weight value
B is read (steps S11 and S12) and 1 count
The weight C is calculated and stored (step S13). This note
The remembered one count weight is used for the next routine.
Used. However, the one obtained by the preceding several routines
An average und weight can also be used. Next, the supply gate valve 34 is stopped and cut out.
Operation is not performed (the supply operation is not performed)
State: Step S14 is YES), blower 36 is driven
(Step S15), the on-off valve V2 is opened (Step S15).
Step S16), empty the master batch M in the weighing hopper 78.
Pneumatic transportation is performed (step S17). When transportation is complete,
Step S17 is YES), the blower 36 is stopped (step S17).
Step S18), the on-off valve V2 is closed. At this stage, the driving
Confirm ON-OFF of the switch 103 (step S2
0), OFF state (NO in step S20),
The dynamic supply device 100 is stopped. If the operation switch 103 is ON,
(Step S20 is YES), screw of molding machine 50
It is determined whether or not is driven (step S21).
When the moving state is reached (YES in step S21), the weight value B
And the number of times of supply F is calculated based on and the count weight C.
(Step S22). In FIG. 10, in step S22
There is a constant indicated by the symbol "k", which is the supply gate valve
34 and the capacity of the through-hole 18.
The ratio with the product is shown. And read the weighing time G
Then, the supply interval H is calculated (step S23).
Step S24). The screw of the molding machine 50 is driven.
(Step S21 is YES), the next routine
Is performed (steps S2-S13).
If the supply gate valve 14 stops (step S14 is YE
S), pneumatic transportation (processing of steps S15-19) is performed.
U. The weighing read in step S23
During the time G, the supply interval H calculated in step S24
Then, cut-out (supply) from the supply gate valve 34 is performed.
Prior to this, the mixing member 92 is driven (step
Step S25), the master batch M and the molding resin material R
It enables more uniform mixing. Then the supply gate
Cut out (supply) from the valve 34 (step S2)
6). This cutout ends the set weighing time G.
(Step S27 is YES). And
The supply gate valve 34 is stopped (step S28), and the mix
The operating member 92 is stopped (step S29). This step
The master batch M is formed by the operation of steps S25-27.
Uniformly mixed in the shaped resin material R and supplied to the molding machine 50
Is done. Then, in step S30, the operation switch
Switch 103 is turned off, and
If it is in the N state (NO in step S30), step S2
Repeat the processing below 1 and supply automatically if OFF
The operation of the device 100 is stopped. In the operation described with reference to FIG.
Sometimes, past data is not stored, so
A corresponding operation is required. For example, in the first time, temporary data
It is possible to use. In addition, one metering motor
Drive one point at a time, read the weight value and
Determines and weighs only the remaining weight value for the weight set value
It is also possible to supply by driving a motor. That is,
There is no problem even with the first operation due to various control methods
You can drive. When exchanging the master batch M, etc.
The dynamic supply device 100 needs to be cleaned. Referring to FIG.
The following describes such a cleaning operation. When the operation switch 103 is turned on
(Step S51 is YES), the blower 36 is driven.
(Step S52), the on-off valve V2 opens (Step S52).
53), the master batch M in the measuring pot 78 is separated
Sent into stage 28. Then, after a certain period of time (step
(Step S54 is YES), the on-off valve V1 is turned on several times only for a short time.
(Step S55), and the metering
Pellet or powder master remaining in the hopper 78
The batch is blown off and the separation means 28 is passed through the passage L1.
To transport. After a lapse of a predetermined time (step S56 is YE
S), the on-off valve V1 is closed (step S57), and further predetermined
After a lapse of time (YES in step S58), the on-off valve V2 is turned off.
Close (step 59). Next, the on-off valve V4 is opened (step S6).
0), the supply gate valve 34 is reciprocated (step S6).
1). By the reciprocating motion of the supply gate valve 34, the separation means 2
A negative pressure is created in the master batch M in the blower 36 by the blower 36.
And is sucked through the passage 48, L3. And Qing
It is transported to the sweeping dust collection hopper 72. After a lapse of a predetermined time (s
Step S62 is YES), and the on-off valve V3 is opened and closed (step S62).
(Step S63), compression in the separating means 28 and the supply gate 34
Air is intermittently supplied to remove the remaining masterbatch M.
It is blown off and transported to the cleaning dust collecting hopper 72. After a lapse of a predetermined time (step S64 is YE
S), close the on-off valve V3 (step S65), and keep it constant
After a lapse of time (YES in step S66), the supply gate valve
34 is stopped (step S67), and the on-off valve V4 is closed.
(Step S68), the blower 36 is stopped (Step S68).
S69). The illustrated embodiment is merely an example.
Note that it is not intended to limit the technical scope of the invention
You. For example, all of the above explanations
Although the supply of star batches is explained,
Amount other than shots (2 shots or more, 1/2 shot,
Automatic supply of 1/3 shot, 3/2 shot, etc)
It will be clear that this is easily done. The effects of the present invention are listed below. (1) A fixed amount of granules (master batch)
Control the number of cuts
Thus, a predetermined amount of granules can be accurately supplied. (2) The amount of the granular material to be supplied is referred to as a so-called "one piece".
By setting the amount corresponding to
Set the mixing ratio between the molding resin material and the granules of the unit to a predetermined value.
Rukoto can. (3) Use a small amount of granules in the supply gate valve
Cut out the molding resin material in the raw material supply section of the molding machine
By mixing with the granules, the granules are obtained in the prior art.
With a degree of uniformity that cannot be achieved,
Color unevenness and color difference of mixed and molded products are prevented.
You. (4) Suction of granules with a blower
Therefore, the separation of the separation means is performed under negative pressure, and
And correct supply can be made. (5) At the time of implementation, the weight measuring means
If interposed between the supply control mechanism and the air transport mechanism,
Weigh the weight of granules supplied via the feed control mechanism
Therefore, the density of the granules can be calculated.
Is measured by volume and its specific gravity or density is calculated,
Using the calculated specific gravity or density,
The weight can be controlled easily and accurately. (6) The particle supply passage and the raw material supply
A mixer is installed downstream (on the molding machine side) of the flow point
If this is the case, the granules and the molding resin material are mixed better,
The color difference is further reduced. (7) Clean the inside of the apparatus when changing particles
If a mechanism is provided for the replacement
Inconvenience due to the mixture of granules and new granules is prevented,
Regular maintenance is extremely easy. (8) A desired amount can be supplied
Noh (2 shots, 3 shots, 1/2 shot)
, 1/3 shot ...).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing another embodiment of the present invention. FIG. 3 is a partially enlarged cross-sectional view showing a connection between a weighing hopper and a passage constituting a pneumatic transport means. FIG. 4 is a partially enlarged sectional view similar to FIG. 3, showing another connection method. FIG. 5 is a partially enlarged sectional view similar to FIG. 3, showing still another connection method. FIG. 6 is a block diagram showing another embodiment of the present invention. FIG. 7 is a sectional view showing another example of the mixing member. FIG. 8 is a block diagram showing still another embodiment of the present invention. FIG. 9 is a block diagram showing a control device used in the embodiment of FIG. 8; FIG. 10 is a view showing a control flowchart of automatic supply in the embodiment of FIG. 8; FIG. 11 is a view showing a flowchart of a cleaning operation in the embodiment of FIG. 8; [Description of Signs] 10: Automatic supply device M: Master batch 12: Storage hopper 14: Supply amount control mechanism 16: Disk 18: Through hole 20: Motor 22 ··· Outlet 24 ··· Pneumatic transport means CL-1 to CL-11 ··· Signal transmission line CU ··· Control device 26 ··· Reservoir V1-V4 ··· On-off valve CA ··· Compressed air Sources L1, L2 Line (passage) 28 Separating means 30 Granular mixing means 32 Dust collection filter 34 Supply gate valve 36 Blower 38 Cylinder 40 ... piston rod 40 42 ... flat plates 46A, 46B ... branch passage 47 ... passage 48 ... granule supply passage 50 ... molding machine 52 ... raw material supply part R ... Molding resin material 76: weight measuring means 78: measuring hopper 80 Weight Total 90 ... Mixer 92 ... mixing member 94 ... driving member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 31/00-31/10 B29C 45/18 B29C 47/10

Claims (1)

(57) [Claims 1] A predetermined amount of granules is cut out by intermittently cutting out the granules (M) stored in the storage hopper (12) by a predetermined amount and controlling the number of times of cutting out. A supply control mechanism (14) provided below the storage hopper (12) for supplying the body (M); and the supply control mechanism (14).
Pneumatic transport means (24) for sucking the granular material (M) supplied from the blower (36) using the blower (36).
6) is linked with the operation of the screw of the molding machine (50) to which the granules (M) are supplied, and the granules sent by the pneumatic transport means (24) are provided above the molding machine (50). Separation means (28) for separating (M) and air is provided, and the molding resin material (12) supplied to the molding machine (50) is further provided with granules (25) separated from air by the separation means (28). M) for uniformly mixing the particles (M), wherein the particle mixing means (30) includes the separating means (28).
A supply gate valve (34) for cutting out the granules (M) separated by a small amount at a time, and a supply gate valve driving means (38) for causing the supply gate valve (34) to perform a cutting operation; and a supply gate valve. A granule supply passageway (48) for joining the granules cut out in (34) to a raw material supply section (52) of the molding resin material (K);
4) and a control unit (CU) for controlling the supply gate valve driving means (38).