JP2003300211A - Quantitative feeder mechanism and system device equipped therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeder mechanism for a thermoplastic fluid raw material which prevents an unforeseen oversupply from occurring and a system device which forcibly sucks a feedstock gas component from a molding machine during heating in an economical manner. <P>SOLUTION: The system device coupled organically with the feed device 3 is structured of a selective combination of a gap S which spreads a space between a feed cylinder sleeve 3d and a feed screw blade 5a to the size larger than a raw material M received from a cushioning hopper 2 with a raw material supply pipe 2A and an exhaust pipe 2B arranged as piping, and an inclination angle θ, of the feed device 3 for conveying the raw material M upward, which is set to meet about an angle of repose of the material M, in part or the entirety of the feed device 3. In addition, the system device has said combination arranged in the main body device 10 of the molding machine through a feeder cylinder 6 attached to a gas vent 2b, which, in turn, is arranged on the suction side consisting of a single system drive air source. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material supply technique attached to an injection or extrusion molding machine, and in particular, quantifies and supplies a flowable thermoplastic solid raw material containing granules or pellets,
In addition, the present invention relates to a manufacturing technique for improving a molding condition of a product by improving an environment just before a molding machine for a raw material.

[0002]

2. Description of the Related Art In this type of molding system apparatus, the type shown in FIG. 5 and FIG. 6 is not installed and the small hopper 2 feeds the main body apparatus 7 of the molding machine, or the main body apparatus shown in FIG. There is a conventional technique in which the paper is supplied through the feeder 10. In either case, the raw material used in advance is a thermoplastic solid raw material (hereinafter simply referred to as raw material) made of a resin or the like that has been processed into a small size and made fluid under air flow.
To use. What is shown in FIG. 5 (hereinafter referred to as Conventional Example 1)
Is a simple structure type that supplies solid raw materials in batch mode,
The one shown in FIG. 6 (hereinafter referred to as “conventional example 2”) is a blower 1 from the raw material source hopper 4 to the cushion hopper 2 continuously.
2 serves as an air transport source, and the raw material is automatically replenished through the raw material supply pipe 2A through the control of the front hopper shutter 9a, and after the raw material is supplied, the exhaust gas is exhausted through the exhaust pipe 2B. The raw material in the cushion hopper is supplied to the main body device 7 of the molding machine through the post-hopper shutter 9c, the sensor 13 is installed in the supply cylinder 6 standing upright in front of the device, and the raw material detection signal is supplied to the signal line 2D. Through the controller 14
The signal processing is performed by, and the blower is controlled by the processing, and the gas component that is desorbed and separated from the thermoplastic resin by heating and melting the raw material in the main body device heating unit 11 is piped through the vacuum suction pipe 2C. It is forcibly excluded by the vacuum pump 15 (Document 1: “Plastics” February 2002 issue, pp30, FIG. 2). here,
The internal structure of any of the main body devices 7, including the one shown in FIG. 7, has a gap between the cutting edges of the main cylinder sleeve 7b lined in the main cylinder 7a and the main screw blade 8b wound around the main screw 8a, Gap S0
Is usually formed by holding 0.1 mm, and is provided with a feed port 4c at the bottom of the hopper 2 or the supply cylinder 6, and a main device side receiving port 4
The configuration for receiving the raw material via d and adjusting the feed amount of the raw material to be conveyed to the heating unit 11 is not changed by the rotation speed of the main screw 8a. The one shown in FIG. 7 in which a feeder is installed (hereinafter referred to as “conventional example 3”) shows an improved method for quantifying the amount of raw material supply to the main body device 7 (Eiji Aiji's “hungry supply system”) and its quantification. As for the supply, the minimum amount that the main screw can convey the supply state of the raw material at the receiving port 4d, that is, the phenomenon that the raw material is piled up in the supply cylinder 6, does not occur at the discharge side end portion of the feed screw 5 (B). The constant amount feeder 10 and the supply cylinder 6 shown in FIG. 2 are provided to adjust the amount of raw material discharged from the feed port 4c so as to maintain the raw material supply which cannot be achieved by the conventional example 1 and the conventional example 2. This feeder is of a horizontal type and is formed between a feed screw blade 5a (outer diameter d) spirally wound around the outer wall of the feed screw 5 and a feed cylinder sleeve 3d (inner diameter D) lining the feed cylinder 3c. The one-sided gap S1 = (D−d) / 2 holds the same gap of 0.1 mm as the above S0, following the main body device 7.

Generally, the gas and water generated in a molding machine are
Even if the raw material is sufficiently dried before being received by the main body device, if the molten resin is re-absorbed, the molding conditions will be deteriorated.
The allowable dry state of the raw material resin including pellets here is 0.2% WT or less in water absorption (200 c / ton of resin).
/ C), the volume of water vapor generated during the continuous molding operation becomes a non-negligible volume, and the drying operation is continued in advance of the molding operation to sufficiently remove the desorbed components, so that the molding operation can be performed. The stains on the mold placed in the final step of the molding machine are reduced. By the way, in the conventional example 3 based on the starvation supply method, the raw material is transported inside the main body device 7 because a space is likely to be formed in the upper part of the main cylinder sleeve 7b, and desorbed components such as gas and steam generated from the molten pellets during the heating operation. Passes through the inside of the main cylinder and further rises through the supply cylinder 6 and the feeder 10, and the airflow heated in the process dries the pellet resin before the main body device 7 is supplied, and as a result of the drying effect, the molding machine final It produces good molded products in the process and brings about good results such that the occurrence rate of product defects is reduced. The incidence of molding defects including appearance defects such as mold burns, weld lines and short shots due to the stains, and gloss of molded products is improved by reducing stains,
Mold disassembly and cleaning costs can be reduced.

FIG. 8 is a schematic diagram showing the state of raw material conveyance in each conventional feeder mechanism. Conventional example 1 shown in FIG.
In addition, in the cushion hopper 2 adjusted to the F2 state before the F1 where the bulk density of the raw material conveyed is the highest except that the raw material is melted and reduced in volume in the heating section 11, a bridge due to accumulation or self-weight of the raw material is generated. There is a fear. Gas generated during heating due to the filler mixed with the raw material mixes into the mold without returning to the feed side, and causes abnormal wear in the main cylinder 8a in the molding example of the high temperature resin raw material. In Conventional Example 2 shown in FIG. 1B, the possibility that the supply cylinder 6 and the hopper rear shutter 9c may cause a bridge is reduced by the presence of the intermediate space FS under the hopper shutter, but this is accompanied by batch feeding. The friction between the raw material particles and the self-weight of the raw material cause the accumulation, and the accumulated F2 state is unavoidable structurally. Compared with the conventional example 1 and the conventional example 2 which cause the accumulation, in the conventional example 3 shown in FIG. 1C, the rotation operation of the feed screw 5 is adjusted to adjust the receiving port 4d of the main body device 7.
It is easy to perform an operation that does not cause raw material accumulation.
Therefore, due to the pushing effect of the rotation operation of the main screw 8a in the main body device 7, the raw material density changes from F4 state of (coarse) to F1 state through F3 state of the process of changing from F4 to F2 (coarse to dense). It has become possible to maximize the bulk density. However, even if you control the rotation operation of the feeder,
When the raw material becomes large, the phenomenon that the original shape is increased cannot be suppressed, and abnormal wear of the feed screw newly occurs. In the cushion hopper 2, a paddle type level meter is arranged in the lower tank by dividing the inside of the tank into upper and lower parts by a shutter in the hopper (not shown) so as to reduce the accumulation of raw material, that is, F
Even if one state occurs, the rotation state controls the dry state, so
A void is formed in the feed cylinder sleeve 3d.

Exhaust components shown in FIGS. 6 and 7 are generally used in order to remove the desorbed components of the heating raw material generated from the inside of the main body device 7 to the outside of the machine and to carry them out from the auxiliary equipment of the feeder or hopper to the outside of the molding equipment. By providing a piping system for degassing, the molding machine and the entire attached equipment are organically arranged to form one system device, and the value of the configuration and proper operation are
Determine the value of the product obtained in the final step of the molding machine, namely initial cost, power cost, product failure rate, cleaning cycle and repair cycle data. In a conventional example 2 shown in FIG. 6, a batch type control by operating a front hopper shutter 9a and a rear hopper shutter 9c by a drive air source system by a blower 12 intermittently almost quantitatively quantifies a raw material and a piping system for supplying a raw material and degassing. The vacuum suction pipe 2C of No. 2 is configured as a system device attached with a two-system piping system. In Conventional Example 3 shown in FIG. 7 (A), one system of a piping system for semicirculating the suction type air transportation device 9 and the cushion hopper 2 is arranged to configure a system device. (Material 2: Nissui Kako Co., Ltd. general product information "System Transport Type LK", pp2, Catalog 95
10-3000). The negative pressure generated by the suction type pneumatic transportation device 9 in the conventional example 3 becomes the raw material conveying force, and this one-system piping makes the initial cost of the entire equipment, maintenance work, and running cost less than the system device of the conventional example 2. . That is, in Conventional Example 3, the horizontal placement type feeder 10 and the system apparatus configured according to the starvation supply method are in an organic imbalance in order to properly operate the molding process.

[0006]

The role of ancillary equipment is important for good molding process operation of the main unit of a molding machine for manufacturing non-defective products. Molding machine and supply cylinder 6 in Conventional Example 2
The narrow space formed between them is almost sealed by the shutter 9c after the hopper, the dense concentration distribution of the generated gas is likely to remain inside the main body device, and in the F1 state in which the conveyance bulk density in the lower part of the supply cylinder 6 is large, the raw material self-weight As a result, the adjacent raw materials are rubbed with each other, and as a result, the raw material becomes finer and the finely divided raw material stays at the bottom of the heating section 11, causing "burning" of the molded product. Regarding Conventional Example 3, as shown in FIG. 8 (C), as a result of observing the feed port 4c of the horizontal feeder 10, the raw material is fed from the lower part of the discharge side end of the feed screw 5 in the F3 state. However, it was observed that the raw material supply from the upper portion of the same end occurred irregularly in the F4 state. Due to this irregular phenomenon, the conventional example 3
It was found that the quantitative control operation of No. 1 was inaccurate, and the degassing effect of sucking the gas from the supply cylinder 6 to the cushion hopper 2 and being sucked into the exhaust pipe 2B was insufficient. The present invention is a melting operation using raw materials including granules and pellets,
It was developed as an improvement means in view of the above-mentioned problems relating to the quantitative feeder and the feeder-attached system device as a manufacturing means for receiving the molten material in a mold to manufacture a molded product, and operated by a starvation supply method. The structure of the quantitative feeder device that can supply the quantified raw material from the feeder to the supply cylinder is decided by improving the optimum quantitative feeder mechanism of the raw material. It is an object of the present invention to newly provide a molding machine manufacturing technique capable of performing a conveying operation capable of creating an improved raw material environment inside a main body apparatus of a molding machine by supplying an accurately quantified raw material.

[0007]

The quantitative feeder mechanism according to the present invention is a feed cylinder for a fluid thermoplastic solid raw material containing granules or pellets transferred from a raw material source hopper to a storage type or continuous replenishing type cushion hopper. The feed cylinder sleeve is installed on the inner surface, and the feed screw blade is wound with a gap between the inner diameter of the sleeve and the outer diameter of the feed screw blade, and a feeder mechanism having a feed screw for variable speed rotation operation is provided. In a fixed-quantity feeder mechanism that supplies the raw material to the main body of the molding machine so that the raw material can be conveyed upward, a feeder mechanism that arranges the raw material at an inclined angle and guides the raw material between the feeder mechanism and the receiving port of the main body On top of that, install a supply cylinder with a gas vent for natural ventilation or forced exhaust,
In addition to arranging each of them, a feed mechanism is installed with a gap sufficiently larger than the size of the raw material provided in a part or all of the section between the feed cylinder sleeve and the feed screw blade and an inclination angle before and after the repose angle indicated by the raw material. It is configured by selectively combining the inclination angle.

The system device with a fixed amount feeder mechanism according to the present invention uses a suction type pneumatic transportation device as a driving air source, sucks the fluid thermoplastic solid raw material from a raw material source hopper, and feeds it to a cushion hopper provided with a feeder mechanism. The system device with a constant quantity feeder mechanism according to claim 1, wherein the constant quantity feeder mechanism is attached to the material source hopper to transport and exhaust the air inside the cushion hopper to a raw material hopper. The internal air of the supply cylinder, which is interposed in the middle of the above, is piped to the exhaust pipe of the suction type air transportation device through the gas vent port attached to the supply cylinder so that the suction suction state can be maintained at all times.

[0009]

In the quantitative feeder mechanism 3 of the present invention configured as described above, the installation inclination angle of the feed device for conveying the raw material received from the cushion hopper upward based on the angle of repose is determined, and the degree of the inclination angle is determined. Corresponding to the size of the gap between the feed screw blade and the feed cylinder sleeve, it was opened at least as large as the raw material size.
The shape of the raw material is not destroyed when the raw material is supplied, and the consolidation phenomenon due to the weight of the raw material during the supply does not occur. Furthermore, the quantified rotary feed operation can be performed without causing the uneven supply phenomenon from the upper side of the feed port, and the error in the measurement control is reduced. Furthermore, since the gap S inside the feed device is made sufficiently large, the occurrence of wear on the feed cylinder sleeve, the feed screw, and the feed screw blade is drastically reduced, the output of the feed device drive motor is reduced, and the feed device itself is synergistically reduced. Has been made smaller and lighter. Further, the gas vent provided at the upper part of the fixed quantity supply cylinder was clearly separated from the dry exhaust flow in the cushion hopper, so that gas transfer to the hopper was eliminated. Since the inclination angle of the feed device was determined according to the physical property called the angle of repose of the raw material, when colorants or additives were added to the raw material generated in the horizontal type when the feed screw was rotated at low speed, the mixing effect was not sufficient due to insufficient stirring. The phenomenon that could not be obtained was greatly improved, and the cause of uneven color in the final molded product was drastically reduced. Similarly, in the system device 1 with a fixed amount feed mechanism, since the gas vent and the exhaust pipe are piped and forcedly sucked, the gas component desorbed from the heated resin gradually increases from the inner side of the main body device to the inlet side. As described above, a gap between raw materials can be present, which facilitates degassing from the inside of the main body device, there is no destruction of raw materials, and there are no unnecessary fine particles or powder components, so defects such as mold deposits are reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A quantitative feeder mechanism and a system device with the mechanism according to the present invention will be described below with reference to the drawings. Here, FIG. 1 is a partial side view including a side cross-section showing the structure for explaining the quantitative feeder mechanism of the present invention.
2 is a side view showing the system configuration of the system apparatus with a quantitative feeder mechanism of the present invention, FIG.
Is for explaining an embodiment of the quantitative feeder mechanism of the present invention, (A) is a partial side sectional view showing one embodiment thereof, (B)
FIG. 4 is a partial side sectional view showing another embodiment, and FIG. 4 is a view for explaining the characteristics of the quantitative feeder mechanism of the present invention.
Is a schematic diagram showing a raw material transport state, and (B) is a partial side sectional view showing an internal structure of the raw material transport.

The quantitative feeder mechanism 3 of the present invention, as shown in FIG. 1, is a raw material dropping port 4b under the cushion hopper 2.
From the position, it is tilted upward in the direction of the feed port 4c, and its inclination angle θ is selected to be around the repose angle of the physical properties of the raw material, and it is connected to the supply cylinder 6 which stands upright at the receiving port 4d of the main body device 7 of the molding machine. There is. Then, through the rotation operation of the feed screw 5 by the power drive of the feeder 3 with a reduction mechanism capable of variable speed,
The cushion hopper 2 is configured to be able to supply the raw material conveyed upward in a substantially closed manner to the main body device 7. Feed screw blade 5 wound around the feed screw 5.
The gap S between the blade edge of a and the feed cylinder sleeve 3d
2 is formed sufficiently wider than the size of the raw material, and a gas vent 2b is attached to the top of the supply cylinder 6.

Further, as shown in FIG. 2, the system device 1 with a constant quantity feeder mechanism of the present invention is constructed by assembling a cushion hopper 2, a constant quantity feeder mechanism 3 and a supply cylinder 6 in this order, and stands upright on the upper side of the main body device 7 of the molding machine. The gas vent port 2b attached to the top of the supply cylinder is provided for natural ventilation, or is connected to the exhaust pipe 2B for forced suction / exhaust so as to be able to communicate with the main body device 7. As shown in FIG. 4B, the feed structure is formed over a part or the entire section,
The gap S2 between the inner diameter D of the feed cylinder sleeve 3d and the outer diameter d of the feed screw blade 5a is the largest of the raw materials M, whether the raw material M is in the form of pellets, tablets or granules. It should be sufficiently larger than the size of the form.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the quantitative feeder mechanism 3 of the present invention will be described with reference to FIGS. The feed device 3 is used as a pellet forming material, and the feed device 3 has an installation inclination angle θ = π / 6, which is substantially the same as the repose angle of the pellet resin, and is sufficiently wider than the used pellet size, and the blade tip of the feed screw blade 5a and the feed cylinder. Gap between the sleeves 3d S2 =
6 mm was set. Gas vent 2b in the upper part of the supply cylinder 6
And a transparent portion 6a made of a hard glass tube is attached to the middle portion of the supply cylinder by externally tightening it with four columns fixed between the upper driving body and the supply cylinder attachment portion 6b to assemble in a sealed manner. Here, the feed screw was made of a nitride material, and the sleeve was made of SUS440CHRC45. 3b
Is a controller for a constant-feeder drive source servomotor, which is indispensable for strictly supplying raw materials at the time of molding precision parts, 4a is a raw material supply port, 2a is an exhaust port, and H is a lower height of the upper part of the supply cylinder 6 Now, it is set to 20 cm. As shown in FIG. 3, a feed in which the gap S is narrower than the raw material size to S1 and a gap in which the gap S2 is sufficiently wider than the raw material size are mixed to be mixed with the blades 5a and / or 5b. The screw 5 may be formed. In the feed device 3 shown in FIG. 3A, the blade portion facing the feed port of the supply cylinder (not shown) is formed to be wide for about one round to form a gap S1 smaller than the pellet size, and other sections. The gap S2 in the portion is formed sufficiently wider than the size of the pellet, and is performed when the installation inclination angle θ is smaller than the size of the angle of repose of the pellet. The same figure (B)
In the structure shown in Fig. 1, the same wide gap S2 is formed in advance, and the gap S is narrowed with respect to other blade portions including the feed port side blade portion of the supply cylinder (not shown). Is installed by adding a blade cover so as to narrow the width of the blade, or is wound in advance to form the blade edge in a narrow gap S1 for about one rotation, and the pellet is intermittently fed from the upper gap of the feed port 4c. If the inclination of the installation inclination angle θ that is easy to fall is insufficient, it may be applied correspondingly, and additional wearing is timely based on the confirmation work by the field implementation test.

An embodiment in which the above-described embodiment of the quantitative feeder mechanism is incorporated to configure a system device with a quantitative feeder mechanism of the present invention will be described with reference to FIG. In this embodiment, the gas vent port 2b attached to the top of the supply cylinder 6 of the quantitative feeder mechanism 3 is connected to the exhaust pipe 2B for forced suction and exhaust. Then, after a normal test run for about 1 year, the pelletized material used was 46 nylon resin as the main material, and glass fiber was added to contain 30% of the total of the additive materials, and supplied. went. Table 1 shows a comparison between the present example and the above-mentioned Conventional Examples 1 to 3 as Comparative Examples 1 to 3, respectively. In this table, each system device is indicated by an attached drawing number or a symbol in a designated drawing number.

[0015]

[Table 1]

In the embodiment of the system device of the present invention, Table 1
In addition to the above, due to the rotation of the feed screw 5, the pellets were in good frictional contact with each other inside the feeder, and a good weighing condition was maintained throughout. As shown in FIG. 4 (A), when the raw material storage state inside the cushion hopper 2 is adjusted to the F2 state where accumulation does not occur, the state of the pellets inside the quantitative feeder mechanism 3 is not shown here. While being held in the F3 state in the process of changing (rough → dense) by the rotation operation of the screw and fed upward, the pelletized raw material instantly reaches the supply cylinder 6 and becomes the F4 state in which the raw material bulk density is (coarse). It falls down. After falling into the main body device 7, the state in which the volume moving speed is constant is maintained, and a transportation state similar to the pellet in the main body device in the conventional example 3 is shown. That is, the main body device 7 immediately below the supply cylinder 6
In the valley portion of the main blade 8b near the receiving port 4d, pellets were not deposited and a good space was recognized. Therefore, in the pellet run-up section immediately before the heating unit 11, good gas components were separated from the heating raw material. When the discharge port of the fixed quantity feed mechanism 3 was intentionally closed, the feed screw 5 idled in the packed pellets. The idling operation does not progress the compaction of the pellet, the overload state of the electric motor does not go into the dangerous area, the range of failure failure is narrow even if the pellet is slightly broken, and the feed device components No trace of wear was observed on the. In the other examples except Comparative Example 2 based on literature citation, the operation was continued until the repair was required, and the operation was stopped in 12 months even if the repair was not required,
I got driving data.

By carrying out the present invention thus constructed, a sufficient effect of removing the desorbed components can be obtained, and the thin AB
In the molding of the molded product of the S resin pellet, short-circuiting of 50 PPM occurred in Comparative Example 3, but 0 P in Example.
It was PM. Furthermore, when aluminum hydroxide is added to the dispersant and the mixed pellets are molded at high temperature, degassing and removal of water vapor components generated by decomposition of the dispersant and vaporization of residual water generated when using an elastomer resin Effective outboard exhaust was achieved. The preferred embodiment of the present invention is, for example, 4-6 pieces per mold, precision part molding of small parts with a total product weight of about 15 g per shot, and food processing using thermoplastic fixed raw materials other than plastic products in particular. And can be applied for drug formulation.

[0018]

According to the quantitative feeder mechanism and the system device with the mechanism of the present invention, the fixed feeder mechanism having the slanted arrangement capable of being conveyed upward based on the physical properties of the raw material and the raw material size as a design requirement is constituted, By organically organizing the piping system of the system equipment attached with this quantitative feeder mechanism, the conditions for improving the process operation in the molding machine were created, so the output of the motor was reduced, and as a result, the feed device was downsized. , Energy saving, and quantitative supply has become much more stable. In addition, the environment inside the molding structure of the system device is optimized without performing highly controlled control work, and the cost efficiency of the initial cost of the system device is increased, so that the system cost is easily spread. In addition, the quality of molded products to be manufactured is improved, the defective rate is reduced, and the maintenance and repair costs including mold cleaning and feed screw replacement are reduced to a fraction or less. The present invention technology, by properly responding to the characteristics of the feedstock and the conditions of the molded product to be manufactured,
Very stable operation can be performed, and it contributes widely to improvement of molding and manufacturing technology in general.

[Brief description of drawings]

FIG. 1 is a partial side view for explaining a quantitative feeder mechanism of the present invention, including a side cross section showing the configuration thereof.

FIG. 2 is a side view showing a system configuration of a system device with a quantitative feeder mechanism according to the present invention.

FIG. 3 is a view for explaining an embodiment of the quantitative feeder mechanism of the present invention, in which (A) is a partial side sectional view showing the first embodiment;
(B) is a partial side sectional view showing another embodiment.

4A and 4B are views for explaining the features of the quantitative feeder mechanism of the present invention, in which FIG. 4A is a schematic diagram showing a raw material transport state, and FIG. 4B is a partial side sectional view showing an internal structure of the raw material transport. Is.

FIG. 5 is a partial side sectional view showing a conventional example 1 (a hopper direct-coupling molding machine) for explaining a conventional technique relating to a feeder mechanism.

FIG. 6 is a partial side cross-sectional view showing a conventional example 2 (system device with a shutter openable / closable feeder) for explaining a conventional technique related to the system device.

FIG. 7 is a view for explaining another conventional technique relating to the system device and the feeder mechanism attached to the system device. FIG. 7A is a side view showing a conventional example 3 (a system device with a horizontal placement type quantitative feeder);
(B) is a partial side sectional view showing the quantitative feeder (horizontal placement type quantitative feeder).

8A and 8B are views for explaining a raw material conveyance state of a feeder mechanism in a conventional technique, FIG. 8A is a schematic diagram showing a state of Conventional Example 1, FIG. 8B is a schematic diagram showing a state of Conventional Example 2, and FIG. C) is a schematic diagram showing a state of Conventional Example 3.

[Explanation of symbols]

1 System Device 2 Cushion Hopper 2a Exhaust Port 2b Gas Release Port 2A Raw Material Supply Pipe 2B Exhaust Pipe 2C Vacuum Suction Pipe 2D Signal Line 3 Feeder 3a Servo Motor 3b Controller (for Servo Motor) 3c Feed Cylinder 3d Feed Cylinder Sleeve 4 Raw Material Hopper 4a Raw material supply port 4b Raw material dropping port 4c Feed port 4d Receiving port 5 Feed screw 5a, 5b Feed screw blade (or outer envelope line) 6 Supply cylinder 6a Transparent part 6b Supply cylinder attachment part 7 Main body device (extruder / injection molding machine) ) 7a Main cylinder 7b Main cylinder sleeve 8 Speed reducer (for main body) 8a Main screw 8b Main screw blade (or outer envelope) 9 Suction type air transport device 9a Front shutter 9b Hopper shutter 9c Hopper rear shutter 10 Horizontal mount type flap Feeder 11 Heating unit 12 Blower 13 Sensor 14 Controller 15 Vacuum pump D Sleeve inner diameter d Screw blade outer diameter F1 Raw material conveying bulk density, F1 (dense)>F2>F3> F4 (coarse) F2 F1 state F3 F4 → F2 (coarse → dense) changing process state F4 Raw material bulk density (coarse) state FS Intermediate space under hopper shutter H Height including transparent cylinder θ Feeder device installation angle S Cylinder sleeve and screw Gap between blades, (D-d) / 2 S0 Same as above (main body device) S1 Same as above, narrower than raw material size (feeder) S2 Above same, wider than raw material size (feeder)

Claims (2)

[Claims] 1. A feed cylinder sleeve in which a fluid thermoplastic solid raw material containing granules or pellets transferred from a raw material source hopper to a storage type or continuous replenishing type cushion hopper is placed on the inner surface of a feed cylinder, and an inner diameter of the sleeve. D and feed screw blade outer diameter d (<D)
And a feeder mechanism having a feed screw capable of rotating at a variable speed and having a feed screw blade wound between them and a gap S = (D−d) / 2, are disposed in the main body of the molding machine. In the quantitative feeder mechanism that can be supplied as much as possible, a feeder mechanism (3) that arranges the raw material (M) with an inclination angle (θ) so that it can be conveyed upward, and an inlet (4d) of the feeder mechanism and the main body device (7). In the meantime, a supply cylinder (6) for guiding the raw material and having a gas vent (2b) for natural ventilation or forced exhaust attached to the upper part thereof is provided upright, and the supply cylinders (6) are sequentially arranged and the feed cylinder sleeve ( Three
The feed mechanism (3) is provided with a gap S sufficiently larger than the size of the raw material (M) provided in a part or all of the section between the d) and the feed screw blade (5a) and an inclination angle before and after the repose angle indicated by the raw material. A quantitative feeder mechanism characterized in that it is configured by selectively combining with an inclination angle (θ) for installing. 2. A suction type air transportation device is used as a drive air source, and a fluid thermoplastic solid raw material is sucked from a raw material source hopper to be pneumatically transported to a cushion hopper provided with a feeder mechanism, and the air inside the cushion hopper is used as a raw material source hopper. A system device with a fixed amount feeder mechanism according to claim 1, wherein said fixed amount feeder mechanism is attached to the fixed amount feeder mechanism (3) and the main body device (7). The internal air of the supply cylinder (6) to be caused to be piped to the exhaust pipe (2B) of the suction type air transportation device (9) through the gas vent port (2b) attached to the supply cylinder so that the suction suction state can be maintained at all times. A system device with a quantitative feeder mechanism, characterized in that it is configured.