JP2000210938A - Automatically measuring and feeding apparatus for synthetic resin molding material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatically measuring and feeding apparatus for synthetic resin molding material of a simple structure at a low cost by a method wherein measurement and feed of the molding material to a molder are simultaneously carried out, a measuring precision is high, and in the case where materials are mixed, a molded article having a stable blending ratio and a high uniformity can be obtained. SOLUTION: This apparatus is equipped with a material storing hopper 1; a suction room 2 of a less capacity than that of the storing hopper 1 provided by being communicated to the storing hopper 1 below the hopper 1; a suction pipe 3 inserted into the suction room 2; a feed hopper 6 to be fitted to a molder A; a feed pipe 4 for linking the feed hopper 6 to the suction pipe 3; a pneumatic carrier conveying means 5 for conveying a molding material to the feed hopper 6 via the feed pipe 4 by sucking the molding material in the suction room 2 from a tip of the suction pipe 3; an open and close valve 7 provided to a bottom part of the feed hopper 6; and a control means 10 for controlling a function time of the conveyor means 5. Thereby, the functioning time of the conveying means 5 is controlled by the control means 10, and the molding material M is measured and fed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a synthetic resin molding machine such as an injection molding machine or an extrusion molding machine, and to a resin raw material, an additive such as a colorant, a stabilizer, an antistatic agent, a flame retardant, and the like. The present invention relates to an apparatus for automatically measuring and supplying a synthetic resin molding material for supplying a molding material such as a master batch in which is contained in a thermoplastic resin at a high concentration.

[0002]

2. Description of the Related Art Conventionally, the supply of a molding material as described above to a synthetic resin molding machine such as an injection molding machine or an extrusion molding machine is mainly performed by an air flow, and is performed by suction (vacuum) and pressure feeding. There is a formula. In addition, the method of measuring the molding material supplied at this time includes a weighing method using an electronic balance or the like, a molding material intermittently cut by a fixed amount by a rotary feeder or the like, and a supply amount by controlling the number of cuts. There are various measuring methods such as a capacity measuring method for controlling the pressure, a measuring method based on the number of rotations of a screw, and an impeller measuring method. And, for example, when obtaining a colored molded product by mixing a colorant with a resin raw material, the colorant or both the colorant and the resin raw material are measured from the storage hopper of the molding material by the above-described measurement method. The colorant or the resin raw material supplied to the molding machine or supplied from the storage hopper to the supply hopper of the molding machine is measured by a measuring device attached to the storage hopper for the molding material, and the resin raw material and the colorant are predetermined. And supplied to the molding machine. However, the weighing device according to the conventional weighing method as described above has a complicated structure and is expensive. There is also known a method in which the molding material in a storage hopper is intermittently supplied using a supply device such as a hopper loader, and the amount of supply is controlled by the operation time of the supply device to perform measurement and supply.
However, in this case, since the amount of the molding material supplied from the storage hopper fluctuates with a change in the remaining amount of the molding material in the storage hopper, the measurement accuracy is low.

[0003]

SUMMARY OF THE INVENTION In view of the above, the present invention makes it possible to simultaneously measure and supply a molding material to a molding machine, and at the same time, has a high measuring accuracy and is suitable for mixing molding materials. An object of the present invention is to provide an automatic metering and feeding device for a synthetic resin molding material which can obtain a molded product having a stable blending ratio and high uniformity, and which is simple and inexpensive.

[0004]

Means for Solving the Problems In order to achieve the above-mentioned object, the present inventors have conducted intensive studies and as a result, have found that molding materials such as resin raw materials, colorants and other additives are injected into an injection molding machine or an extrusion molding machine. When supplying, by a pneumatic conveying type conveying means from a molding material storage hopper, the operation time of the supplying means is controlled to convey and supply a predetermined amount of molding material to the molding machine. By providing a space that is communicated with and has a smaller capacity than the storage hopper, the space is always filled with a substantially constant amount of molding material, and this substantially constant amount of molding material is always filled. When the molding material is sucked from the space by the conveying means of the air conveying type and supplied to the molding machine, irrespective of the remaining amount of the molding material in the storage hopper, only by controlling the operation time of the conveying means, with high measuring accuracy. Molding material It found that it is possible to supply, to complete the present invention.

That is, the apparatus for automatically measuring and supplying a synthetic resin molding material according to the present invention comprises a storage hopper 1 for storing a synthetic resin molding material, and a storage hopper 1 provided below the storage hopper 1 in communication with the storage hopper 1. , A suction pipe 3 inserted into the suction chamber 2, a supply hopper 6 attached to the molding machine A, a supply pipe 4 connecting the supply hopper 6 and the suction pipe 3, and a suction pipe 3. A conveying means 5 of an air conveying type for sucking the molding material in the suction chamber 2 from the tip of the container and conveying the molding material to the supply hopper 6 via the supply pipe 4;
And a control means 10 for controlling the operation time of the conveying means 5. The reference numerals in the specification correspond to the configuration of the apparatus of the embodiment shown in the drawings.

According to the apparatus for automatically measuring and supplying a molding material according to the present invention as described above, only the operation time of the conveying means 5 is controlled by the control means 10 and separately from the supplying step as in the prior art. It is possible to supply the molding material in an amount corresponding to the operation time of the conveying means 5 without providing a process, and by setting the operation time of the conveying means 5 in advance by the control means 10, it is possible to measure and measure the molding material. The feed can be performed simultaneously and with high metering accuracy. The reason why the automatic weighing and feeding device according to the present invention has high weighing accuracy is considered as follows. That is, conventionally, when a molding material is supplied from a storage hopper by a supply unit such as a hopper loader, a supply amount per unit time fluctuates, and a supply time and a supply amount by the operation of the supply unit do not always correspond to a constant. However, it was not possible to accurately measure only by controlling the supply time. This is because the remaining amount of the molding material in the storage hopper fluctuates (for example, the amount of molding material used decreases, Increase due to replenishment of molding materials)
When the supply pressure of the supply means is constant, the weight pressure varies with the load of the molding material in the storage hopper with respect to the suction port when the molding material is sucked from the storage hopper. It is considered that the suction amount fluctuates according to the condition. On the other hand, in the apparatus of the present invention, a suction chamber 2 communicating with the storage hopper 1 and having a smaller capacity than that of the storage hopper 1 is provided below the storage hopper 1, and the molding material therein is sucked from the suction pipe 3. Then, only the reduced amount of molding material sucked from the suction pipe 3 is sequentially replenished from the storage hopper 1, and a substantially constant amount of molding material always exists in the suction chamber 2. Even when the remaining amount of the molding material in the storage hopper 1 fluctuates due to a decrease in the remaining amount of the molding material with the supply and an increase in the replenishment of the molding material into the storage hopper 1, the suction is also performed. Since the weight pressure due to the load of the molding material on the suction port at the tip of the suction pipe 3 inserted into the molding material in the chamber 2 hardly fluctuates, the supply amount of the molding material per unit time hardly fluctuates. Therefore, the operation of the transport means 5 Only supplies during i.e. by controlling the supply time is believed to be supplied to the molding machine molding material in a state of high measurement accuracy.

In the automatic weighing and feeding apparatus according to the present invention as described above, the control means 10 can intermittently actuate the conveying means 5 to intermittently supply a predetermined amount of molding material to the supply hopper 6. . Therefore, a plurality of molding materials can always be mixed at a fixed ratio and supplied to the molding machine.
For example, when molding a colored molded product, the automatic weighing and supplying device according to the present invention weighs a predetermined amount of a resin raw material and a coloring agent and supplies them to a supply hopper of the molding machine. By supplying to A, it is possible to obtain a highly uniform colored molded product with a stable mixture ratio of the resin raw material and the colorant.

The molding material supplied to the molding machine by the automatic metering and supply device according to the present invention includes additives such as a resin raw material, a colorant, a stabilizer, an antistatic agent, a flame retardant, and a thermoplastic resin. A powdery or granular molding material such as a master batch which is contained in a resin at a high concentration is exemplified.

According to the above-described apparatus for automatically measuring and supplying a molding material, when the transporting means 5 is operated by the control means 10 in a state where the opening / closing door 7 at the bottom of the supply hopper 6 is closed in advance, the storage hopper 1 The molding material in the suction chamber 2 provided in communication with the suction port 14 at the tip of the suction pipe 3 inserted into the molding material.
Then, the molding material is supplied to the supply hopper 6 attached to the molding machine via the supply pipe 4 in an amount corresponding to the transfer capacity and the operation time of the transfer means 5 operated by the control means 10. Therefore, by setting the operation time of the conveying means 5 in advance by the control means 10, a desired amount of molding material can be supplied continuously or intermittently. At this time, since the molding material supplied to the molding machine A is replenished from the storage hopper 1 into the suction chamber 2 provided in communication with the storage hopper 1, a substantially constant amount of the molding material always exists. Therefore, the weight pressure due to the load of the molding material in the vicinity of the suction port 14 at the tip of the suction pipe 3 is substantially constant and does not fluctuate, and the molding material is always supplied to the molding machine with high precision according to the operation time of the conveying means 5. be able to. Supply hopper 6 as described above
The molding material M conveyed to the molding machine A is supplied to the molding machine A by opening the opening / closing door 7 at the bottom of the supply hopper 6.

The structure, shape, positional relationship and capacity ratio between the storage hopper 1 and the suction chamber 2 are not particularly limited.
The storage hopper 1 and the suction chamber 2 are filled with the molding material supplied to the molding machine A after the molding material filled in the storage hopper 1 flows into the suction chamber 2 through the communicating portion thereof, and the suction chamber 2 is filled. It is only necessary that a certain amount of molding material can be always present in the inside. For example, the shapes of the storage hopper 1 and the suction chamber 2 may be square or circular, and they may be adjacent to each other or connected by a communication pipe. Also, there is no particular limitation on the capacity ratio between the two, but if the storage hopper 1 is too small, it is necessary to frequently replenish the molding material.
The capacity ratio between the storage hopper 1 and the suction chamber 2 is about 10: 1. For example, if the capacity of the storage hopper 1 is to store 200 kg of molding material, the suction chamber 2 should have a capacity such that about 20 kg of molding material can enter. . In addition, the amount of the resin raw material used is large, whereas the additive such as the coloring agent is 1% based on the resin raw material.
It is needless to say that the storage hopper 1 and the suction chamber 2 each having a size corresponding to the usage amount of each molding material are preferably used since the usage amount is as small as about several%.

The conveying means 5 is only required to be capable of sucking the molding material in the suction chamber 2 from the suction pipe 3 at the tip of the supply pipe 4 and supplying the molding material to the supply hopper 6 by utilizing the air flow. There is no limitation, and a suction type, supply pipe which sucks and conveys the molding material from the suction port 14 at the tip of the suction pipe 3 by reducing the pressure in the supply pipe 4 using a vacuum pump or a vacuum motor or the like. A pressurized type in which compressed air is injected into the middle of 4 and the molding material is sucked and guided from the suction port 14 of the suction pipe 3 with the suction of the compressed air and is conveyed by the compressed air, or both may be used in combination. Among these various air-conveying conveying means, when using a suction type, especially when using a vacuum motor, the apparatus is simple and the cost is low, and the control is easy. In particular, when the molding material to be automatically measured and supplied is an additive such as a coloring agent, the supply amount is small relative to the resin raw material, so that a small vacuum motor can be used. In addition, when the supply amount is small as described above, it goes without saying that the supply pipe 4 and the like are also used accordingly. Note that the suction pipe 3 at the tip of the supply pipe 4 is not necessarily the supply pipe 4
It is not necessary to separately provide the end portion of the supply pipe 4, and the end portion of the supply pipe 4 may be directly inserted into the suction chamber 2 as the suction pipe 3.

The automatic weighing and filling apparatus for a molding material according to the present invention comprises a storage hopper 1, a suction chamber 2, a suction pipe 3, a supply pipe 4, a conveying means 5, and a supply hopper 6 having an opening / closing door 7. And a plurality of sets for the raw material resin and the additive. That is, when there are a plurality of types of molding materials to be supplied to the molding machine A, the storage hopper 1, the suction chamber 2, the supply chamber 2, and the automatic weighing and supply each molding material to the molding machine according to the number of the types. It is sufficient to provide a supply hopper 6 provided with the pipe 4, the conveying means 5, and the opening / closing door 7, and as described above, it is preferable that these are sized according to the supply amounts of the respective molding materials. In this case, the control means 10 may be provided for each of the plurality of sets of devices, or the plurality of sets of devices may be controlled by one control means 10. As described above, when a plurality of sets of devices are provided, the supply of the molding material is started at the same time, and the termination of the supply is stopped for a time set for each molding material.

Further, when a plurality of supply hoppers 6 are provided as described above, a mixing hopper 8 attached to the molding machine A is connected below the supply hoppers 6 and supplied to the respective supply hoppers 6. The molding material can be mixed in the mixing hopper 8 and then supplied to a molding machine. The mixing hopper 8 may be vertical or horizontal, and its shape and structure are not particularly limited. Further, when the mixing hopper 8 is provided,
The molding material is supplied to the supply hopper 6 in a state where the opening and closing door 7 at the bottom of each supply hopper 6 is closed, and then the opening and closing door 7 is opened and the molding material is dropped into the mixing hopper 8 from here, and the charging is completed. Then, the door 7 is closed. The structure of the opening / closing door 7 is not particularly limited. In addition to an opening / closing door that is opened by a load of a molding material supplied to the supply hopper 6 using a spring, an electric door using a solenoid or the like or an air door. The control means 10 may control the door that opens and closes with a cylinder or the like to open and close in conjunction with the conveyance of the molding material to the supply hopper 6 by the conveyance means 5.

Further, in the mixing hopper 8, a mixing means 9 for uniformly mixing the molding material dropped from each supply hopper 6 can be provided. As the mixing means 9, a baffle plate may be provided in the middle of the mixing hopper 8, or a stirring device may be provided. However, since the molding material is melt-kneaded in a molding machine, for example, an injection molding machine or an extrusion molding machine, This mixing means 9 is not always necessary.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments shown in the drawings, but these embodiments do not limit the present invention at all.

FIGS. 1 and 2 are schematic explanatory views showing an embodiment of a molding machine equipped with an apparatus for automatically measuring and supplying a synthetic resin molding material according to the present invention. In the figure, reference numeral 1 is
A storage hopper for storing a molding material M such as a resin raw material, a colorant and other additives supplied to the molding machine A. The bottom of the storage hopper is formed in an inclined shape, and the suction chamber communicates with the inclined bottom. 2 is provided so that the molding material can be quickly replenished from the storage hopper 1 into the suction chamber 2 by the reduced amount of the molding material M in the suction chamber 2. The storage hopper 1 and the suction chamber 2 shown in FIG.
The storage hopper 1 and the suction chamber 2 are provided separately from each other as shown in FIG. 2 while being connected to each other through a communication port 12 provided at an upper portion of the suction chamber 2. The bottom may be communicated with the upper part of the suction chamber 2 by the communication pipe 13. And, as the molding material M in the suction chamber 2 decreases,
Since the reduced amount of the molding material M quickly flows in from the storage hopper 1 and is replenished, a substantially constant amount of the molding material M is always present in the suction chamber 2. The capacity of the storage hopper 1 and the suction chamber 2 may be set according to the amount of the molding material M supplied to the molding machine A therefrom. Further, the volume ratio between the storage hopper 1 and the suction chamber 2 is not particularly limited, as long as a substantially constant amount of the molding material M can always be present in the suction chamber 2. Enlarge. For example, when the storage hopper 1 has a size capable of storing 200 kg of the molding material, the suction chamber 2 has a capacity of 20 kg.
kg. The other structures and shapes of the storage hopper 1 and the suction chamber 2 are not particularly limited, and the bottom of the storage hopper 1 in the illustrated example is inclined only in one direction, but is inclined toward the center. From the suction chamber 2.

The molding material M flowing from the storage hopper 1 is always present in a substantially constant amount in the suction chamber 2, and the suction pipe 3 is inserted into the molding material M in the suction chamber 2.
A supply pipe 4 is connected to the suction pipe 3. Suction pipe 3
The suction port 14 at the tip is provided near the bottom of the suction chamber 2, and the suction port 14 is formed by cutting the tip of the suction pipe 3 obliquely.
14 so as not to be blocked by the bottom of the suction chamber 2 and the molding material M
Is formed so as to be easily sucked. In the illustrated example, the suction pipe 3 is made of, for example, a metal pipe, and the supply pipe 4 made of, for example, a metal pipe or a flexible pipe.
However, the tip of the supply pipe 4 may be directly inserted into the suction chamber 2 as the suction pipe 3.

The other end of the supply pipe 4 is connected to a supply hopper 6 attached to the molding machine A. Supply hopper 6
A vacuum motor 5 as a conveying means is provided on the upper part of the apparatus via a separating means (not shown).
An opening / closing door 7 is provided at the bottom of the molding material M. The molding material M in the suction chamber 2 is sucked into the supply hopper 6 from the suction pipe 3 at the tip via the supply pipe 4 by the vacuum motor 5 and the sucked molding material M is sucked. Is separated from the air by the separating means and dropped into the supply hopper 6. The vacuum motor 5
The transfer means such as can be installed at a location remote from the supply hopper 6 as shown in FIG. As the transfer means, in addition to the suction-type transfer means such as the vacuum motor 5 and the vacuum pump, an air supply pipe from a compressor or the like (not shown) is connected in the middle of the supply pipe 4 so that the supply pipe 4 A pressurized feed system in which compressed air is injected into the suction chamber 2 and the molding material M in the suction chamber 2 is sucked and guided from the suction port 14 of the suction pipe 3 with the suction of the compressed air, and is conveyed to the supply hopper 6 by the compressed air.
Further, both the suction type and the pressure feeding type conveying means can be used in combination.

In the apparatus shown in the figure, two sets of the supply hopper 6 provided with the storage hopper 1, the suction chamber 2, the suction pipe 3, the supply pipe 4, the conveying means 5, and the opening and closing door 7 as described above are provided (one of them). The storage hopper 1, the suction chamber 2, and the suction pipe 3 are not shown).
In the illustrated embodiment, a mixing hopper 8 is provided below two supply hoppers 6, and each of the supply hoppers is provided. Molding material M supplied to each of No. 6
Are mixed in the mixing hopper 8 and then supplied into the molding machine A from the supply port 11 of the molding machine A. In addition, even when there are many types of the molding material M to be supplied, the above-described storage hopper 1 to the supply hopper 6 may be provided for each of them according to the number.

The vacuum motor 5 as a transport means provided in the supply hopper 6 is connected to a control means 10 such as an electric control device by a signal line 16, and its operation time is controlled by a signal from the control means 10. The amount of the molding material M conveyed from the storage hopper 1 to the supply hopper 6 by controlling
The operation is controlled by the operation time. In addition, each molding material M from each storage hopper 1 to the supply hopper 6
Is determined by the transfer capacity of the transfer means 5 set by the use amount according to the mixing ratio of each molding material M, the thickness of the supply pipe 4 and the suction pipe 3, and the size of the suction port 14 at the tip. Of course.

Further, an opening / closing door 7 is provided at the bottom of the supply hopper 6 between the supply hopper 6 and the mixing hopper 8. The door may be of various types, such as a spring type, an electromagnetic type, a mechanical type, or a type that opens and closes with an air cylinder. The opening and closing door 7 is connected to the control means 10 by a signal line 17.
The mixing hopper 8 may be of the horizontal type shown in FIG. 2 in addition to the vertical type shown in FIG. 1, and the structure thereof is not limited. Further, a mixing means 9 such as a baffle plate shown in FIG. 1 or a stirring device shown in FIG. 2 is provided in the mixing hopper 8. It is not always necessary to provide the mixing means 9.

Next, a method for automatically measuring and supplying the molding material M to the molding machine A by the illustrated apparatus will be described. First, the operation time of each vacuum motor 5 is set in advance in the control means 10 according to the required supply amount (use amount, mixing ratio of each molding material M, etc.) of each molding material M. Then, when the apparatus is turned on, the opening / closing door 7 between the supply hopper 6 and the mixing hopper 8 is closed by a signal from the control means 10. In the case of the spring-type door 7, the door 7 is closed until the molding material M is supplied into the supply hopper 6. Next, the control means 10
The vacuum motor 5 operates for a time set in advance by the control means 10 in response to a signal from the controller. By the operation of the vacuum motor 5, suction of the molding material M is started from the suction port 14 at the tip of the suction pipe 3, and the molding material M is conveyed to the supply hopper 6 via the suction pipe 3. At this time, as the molding material M is transported from the suction chamber 2 to the supply hopper 6, the reduced amount of the molding material M in the suction chamber 2 is transferred from the storage hopper 1 through the communication port 12 or the communication pipe 13 to the suction chamber 2. And the molding material M in the suction chamber 2 is always maintained at a substantially constant amount. The molding material M conveyed from the suction chamber 2 to the supply hopper 6 by the air flow caused by the suction of the vacuum motor 5 is separated from the air by separation means (not shown) and falls into the supply hopper 6. Then, when a predetermined amount of molding material M is supplied to the supply hopper 6 after the time set in advance in the control means 10, the operation of the vacuum motor 5 is stopped, and the supply of the molding material M is stopped. The suction and transfer of the molding material M by the vacuum motor 5 are started by starting a plurality of vacuum motors 5 at the same time, and the end and stop are performed for a time set for each molding material. In this way, the molding material M is automatically measured and supplied from the storage hopper 1 to the supply hopper 6 under the control of the control means 10. When the supply of the molding material M to the supply hopper 6 is completed, the opening / closing door 7 between the supply hopper 6 and the mixing hopper 8 is opened by a signal from the control means 10, and the molding material M in the supply hopper 6 is It is dropped into. At this time, in the case of the spring type opening / closing door 7, the molding material M dropped into the supply hopper 6 is opened by the load, and the molding material M in the supply hopper 6 is dropped into the mixing hopper 8. The respective molding materials M put into the mixing hopper 8 are mixed with each other in the mixing hopper 8 and then supplied from the supply port 11 into the molding machine A, where they are melted and kneaded by the screw 15 in the molding machine A while being heated. And subjected to molding.

[0023]

As described above, according to the present invention, it is possible to reduce the labor and efficiency of the step of measuring and supplying the molding material in the step of molding the synthetic resin, particularly the step of mixing the additives in the step of coloring the synthetic resin. Can be realized using a simple and inexpensive device.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a molding machine provided with an apparatus for automatically measuring and supplying a synthetic resin molding material according to the present invention.

FIG. 2 is a schematic explanatory view showing another embodiment of a molding machine provided with an automatic measuring and feeding device for a synthetic resin molding material according to the present invention.

[Explanation of symbols]

1: storage hopper, 2: suction chamber, 3: suction pipe, 4: supply pipe, 5: transport means, 6: supply hopper, 7: open / close valve, 8:
Mixing hopper, 9: mixing means, 10: control means, 11: supply port, 12: communication port, 13: communication pipe, 14: suction port, 15: screw, 16, 17: signal line, A: molding machine, M : Molding material.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F201 AB11 AB12 AC01 AC08 AL03 AL11 AL16 AL21 AR11 AR14 BA06 BC02 BC12 BC15 BC19 BC37 BD04 BD05 BQ01 BQ08 BQ18 BQ21 BQ32 BQ35 BQ54 BQ57 4F206 AB11 AB12 AC01 AC08 AL03 AL11 AL14 AR11 AR11 AR14 JA03 JA07 JF01 JF02 JF11 JF12 JF21 JF36 JF41 JF48 4F207 AB11 AB12 AC01 AC08 AL03 AL11 AL16 AL21 AR11 AR14 KA01 KF01 KF02 KF12 KM13

Claims (8)

[Claims] 1. A storage hopper 1 for storing a synthetic resin molding material, a suction chamber 2 provided below the storage hopper 1 in communication with the storage hopper 1 and having a smaller capacity than the storage hopper 1, and a suction inserted into the suction chamber 2. A pipe 3, a supply hopper 6 attached to the molding machine A, a supply pipe 4 connecting the supply hopper 6 and the suction pipe 3, and a supply pipe 4 for sucking the molding material in the suction chamber 2 from the tip of the suction pipe 3; And a control means 10 for controlling an operation time of the transfer means 5, an air transfer type transfer means 5 for transferring the molding material to the supply hopper 6 through the opening and closing valve 7 provided at the bottom of the supply hopper 6. Automatic measuring and feeding device for synthetic resin molding materials. 2. An apparatus for automatically measuring and supplying a synthetic resin molding material according to claim 1, wherein a predetermined amount of molding material is supplied to the supply hopper by operating the conveying means provided above the supply hopper by the control means. . 3. The apparatus according to claim 1, wherein said molding material is a resin raw material and an additive. 4. The apparatus according to claim 3, wherein the additive is a colorant or a masterbatch. 5. The automatic measuring and feeding apparatus for a synthetic resin molding material according to claim 1, wherein said air conveying type conveying means 5 is a suction type. 6. A storage hopper 1, a suction chamber 2, a suction pipe 3, a supply pipe 4, and a conveying means 5 for resin raw materials and additives.
2. The automatic measuring and feeding apparatus for a synthetic resin molding material according to claim 1, wherein a plurality of sets of the feeding hoppers 6 provided with the opening and closing doors 7 are provided. 7. A molding machine A is provided below a plurality of supply hoppers 6.
7. A mixing hopper 8 attached to the hopper is continuously provided.
Automatic metering and feeding device for the synthetic resin molding material according to the above. 8. An apparatus for automatically measuring and supplying a synthetic resin molding material according to claim 7, further comprising means for mixing molding material in said mixing hopper.