JP2000000848A - Injection molding machine, device for manufacture of recycled resin, method for injection molding, manufacture of recycled resin, injection molding article, and recycled resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for forming a molding containing no gas and no moisture by forming a recycled resin pellet containing completely no gas and no moisture from a used resin molding, and using the recycled resin pellet. SOLUTION: Regenerated and recycled resins are supplied into an injection molding chamber 14. An amount of the charged resins is sensed by a sensor so that a predetermined amount of the resin is not stored in the chamber. Further, a predetermined constant amount of the resin is supplied to the chamber. A moisture and a gas in the resin supplied into the chamber are discharged in a melting step, and a gas containing the discharged moisture and gas is exhausted under a reduced pressure into the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding apparatus and an injection molding method using a recycled resin and a recycled resin, an apparatus and a method for producing a recycled resin for producing a recycled resin, and an injection molded article and a recycled article. About resin.

[0002]

2. Description of the Related Art Recently, it is environmentally desirable to reuse a used resin molded product. Therefore, a method of manufacturing a used resin molded product into a recycled resin pellet is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-155474. The patent is ASG
A composite resin made of a resin or the like is pulverized, and the obtained pulverized product is removed by a vent-type extruder while removing the generated gas from 180 to 19
Extrude from a die at a temperature of 0 ° C. and extrudate 2-6 mm
To produce recycled resin pellets. The regenerated resin pellets thus produced are supplied to an injection molding machine and are subjected to injection molding.

[0003]

The used resin molded article generally contains a large amount of gas and water. If gas or moisture is contained in the regenerated resin pellets, a molded product molded by injection molding contains gas or air bubbles, resulting in a defective product. If a gas is contained in the molten resin during the injection molding, the gas enters the mold with the resin at the time of injection, and the gas adheres to the surface thereof. As a result, the mold must be cleaned and replaced frequently, resulting in poor workability. Therefore, it is required that the recycled resin pellets contain no gas or moisture. The patent discloses removing generated gas. However, when making recycled resin pellets that do not completely contain gas or moisture from used resin moldings, and when making molded products that do not contain gas or moisture using recycled resin pellets, At present, no technology has been established on how to remove these.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is intended to produce a recycled resin pellet completely free of gas and water from a used resin molded product, and further to use the recycled resin pellet. It is an object of the present invention to provide a technique for producing a molded product containing no gas or moisture.

[0005]

An injection molding apparatus according to the present invention melts a recycled resin and a recycled resin supplied into an injection molding chamber while stirring the resin in the injection molding chamber and provides the resin at one end of the injection molding chamber. In order to supply a predetermined amount of the resin into the injection molding chamber, which is determined at least from the pressure in the injection molding chamber and / or the reservoir, in the injection molding apparatus for injecting the molten resin from the injection hole provided. And a pressure reducing device for discharging gas containing water and gas evaporated from the resin in the melting process in the injection molding chamber.

In the injection molding apparatus according to the present invention, the recycled resin and the recycled resin supplied into the injection molding chamber are melted while being stirred in the injection molding chamber and melted through an injection hole provided at one end of the injection molding chamber. An injection molding apparatus for injecting the resin thus obtained, a detection device for detecting that a predetermined amount or more of the resin has been supplied into the injection molding chamber, and the detection of the resin based on information from the detection device. A resin supply amount adjusting device for adjusting the supply amount to the injection molding chamber, and a pressure reducing device for exhausting a gas containing moisture evaporated from the resin in a melting process in the injection molding chamber, I do.

[0007] The injection molding apparatus according to the present invention further comprises gas supply means.

[0008] The injection molding apparatus according to the present invention further comprises a heating device for heating the resin before being supplied to the injection molding chamber.

[0009] The injection molding apparatus according to the present invention is characterized by further comprising a removing device for removing a gas containing water discharged from the decompression device.

An injection molding method according to the present invention comprises the steps of supplying a predetermined amount of recycled resin and recycled resin at least from the pressure in the injection molding chamber and / or the storage into the injection molding chamber. Exhausting a gas containing water and gas evaporated from the resin during the melting process to the outside of the injection molding machine, and extruding the resin melted in the injection molding machine from the other end of the injection molding machine and injecting it into a mold. And a step.

The injection molding method according to the present invention comprises the steps of: supplying a recycled resin and a recycled resin to an injection molding chamber;
A step of detecting that a predetermined amount or more of the resin is supplied into the injection molding chamber; a step of adjusting a supply amount of the resin into the injection molding chamber based on the detection information; and Exhausting a gas containing water and gas evaporated from the resin during the melting process to the outside of the injection molding machine, and extruding the resin melted in the injection molding machine from the other end of the injection molding machine and injecting it into a mold. And a step.

[0012] The injection molding method according to the present invention further comprises a step of supplying a gas.

[0013] The injection molding method according to the present invention further comprises a heating step for heating the resin.

The injection molding method according to the present invention further comprises a removing step for removing a gas containing water discharged from the pressure reducing device.

[0015] The recycled resin manufacturing apparatus according to the present invention is a recycled resin manufacturing apparatus in which a used resin pulverized material is melted in a molding chamber and a regenerated resin is discharged from an outlet hole provided at one end of the molding chamber. A resin pulverized material quantitative supply device for supplying the resin pulverized material of a predetermined supply amount predetermined from at least the pressure in the molding chamber and / or the storage into the molding chamber; and A decompression device for discharging a gas containing moisture and gas evaporated from the resin pulverized material.

An apparatus for producing a recycled resin according to the present invention is an apparatus for producing a recycled resin in which a used resin pulverized material is melted in a molding chamber and a regenerated resin is discharged from an outlet hole provided at one end of the molding chamber. A detecting device for detecting that a predetermined amount or more of the resin pulverized material is supplied into the molding chamber, and adjusting a supply amount of the resin pulverized material to the molding chamber based on information from the detecting device. And a pressure reducing device for exhausting a gas containing moisture evaporated from the resin pulverized material in the melting process of the molding chamber.

The recycled resin manufacturing apparatus according to the present invention further includes gas supply means.

The apparatus for producing a recycled resin according to the present invention further includes a heating device for heating the pulverized recycled resin before being supplied to the molding chamber.

The recycled resin manufacturing apparatus according to the present invention further includes a removing device for removing a gas containing water discharged from the pressure reducing device.

In the method for producing a recycled resin according to the present invention, a step of pulverizing a used resin molded product, a step of supplying the resin pulverized product to a molding chamber, Detecting the supply; adjusting the supply amount of the resin pulverized material into the molding chamber based on the detection information; and evaporating water or the like from the resin pulverized material during the melting process of the injection molding chamber. The method includes a step of exhausting gas containing gas out of the molding chamber, and a step of discharging resin melted in the molding chamber from the other end of the molding machine.

The method for producing a recycled resin according to the present invention comprises a step of pulverizing a used resin molded product, and a step of supplying a predetermined supply amount of the resin pulverized product at least predetermined from the pressure in an injection molding chamber and / or a storage chamber. Supplying a gas containing water and gas evaporated from the resin pulverized material during the melting process of the injection molding chamber to the outside of the molding chamber; Exiting from the end.

The method for producing a recycled resin according to the present invention further comprises a step for supplying a gas.

The method for producing a recycled resin according to the present invention further comprises a heating step for heating the pulverized resin.

The method for producing a recycled resin according to the present invention further comprises a removing step of removing a gas containing water discharged from the pressure reducing device.

An injection-molded article manufactured by the injection molding machine or the injection molding method according to the present invention.

A recycled resin manufactured by the recycled resin manufacturing apparatus or the method for manufacturing a recycled resin according to the present invention.

[0027]

[Action] Recycled resin made from used resin molded products,
The following resins are known as recycled resins. (1) A polyethylene resin, at least two or more thermoplastic resins which are a combination of materials selected from a polyamide resin, a polyester resin, a polypropylene resin, a polyethylene resin, and the like, and an epoxidized (partially hydrogenated) diene Resin consisting of a polymer. (2) A resin obtained by adding a polycondensation catalyst to a polyester resin. (3) A resin composed of ASG resin, urethane resin and PVC resin.
(4) A resin comprising a polyethylene-based resin, a thermoplastic resin, and a saturated styrene-based thermoplastic elastomer having a specific structure or a modified product thereof. (5) Polyolefin resin. (6) Polypropylene resin. (7) ABS (acrylonitrile-butadiene-styrene) resin. (8) A polycarbonate resin mixed with a silicon compound.

Injection molding using the above-mentioned recycled resin and recycled resin is performed as follows. In this case, the above-mentioned recycled resin and recycled resin may be used in an undried state without being put in a drying furnace, as well as being sufficiently dried in a drying furnace in advance. The resin is preferably in the form of a pellet. First, pellet-shaped recycled resin and recycled resin are supplied into the injection molding chamber through the storage body. In this case, it is preferable that a predetermined supply amount of the resin pellet be supplied into the injection molding chamber. The resin pellets are conveyed to the screw supply zone, compression zone and metering zone while rotating. During this time, the pellets are heated and melted. In this melting step, moisture and gas in the resin pellets are released.

Here, the rotation of the screw in the cylinder is rarely performed constantly. Therefore,
When the resin pellets are continuously supplied into the injection molding chamber, the resin pellets overflow from the injection molding chamber and start to accumulate in the storage cylinder. If this state continues, exhaust of water, gas, and the like generated from the resin pellets during the melting process in the injection molding chamber is blocked. For example, when a resin pellet exceeding 125 cc is supplied into the injection molding chamber in a 50-ton injection molding apparatus, the resin pellet overflows from the injection molding chamber.

As a result, moisture and gas are not exhausted to the outside even when the exhaust device is used, and moisture remains in the resin pellets, so that a high quality molded product cannot be obtained. Then, the detection device is attached to a predetermined position in the storage body, and the injection molding chamber becomes a predetermined amount or more, and the resin pellets from the injection molding chamber start to be deposited in the storage cylinder. Detecting that the deposit has reached a predetermined position in the storage, a signal of information indicating that the inside of the injection molding chamber has exceeded a predetermined amount is transmitted to the pellet supply amount adjusting device via the control device. The adjusting device adjusts the supply amount based on this information and adjusts the adjusting device so that the resin pellet does not always overflow the injection molding chamber by a predetermined amount or more. Thus, there will always be a certain amount of pellets in the injection molding chamber.

The closer the detector is to the supply zone, the sooner the amount of pellets in the supply zone can be detected. That is, since the information that the pellet has overflowed from the supply zone is transmitted to the pellet supply amount control device quickly, the supply amount from the pellet supply amount control device can be quickly adjusted. In this way, it is possible to keep a constant amount of pellets in the supply zone while minimizing the state in which the pellets overflow from the supply zone.

By supplying a predetermined amount of recycled resin pellets to an injection molding apparatus, moisture and gas are not contained in a molded article molded by injection molding. The predetermined supply amount is determined based on the pressure in the injection molding chamber or the reservoir and / or the heating temperature of the pellet.

The predetermined supply amount can be increased by increasing the degree of pressure reduction. By performing the heating, it is possible to increase the predetermined supply amount even if the degree of pressure reduction is reduced. Further, by increasing the heating temperature and the degree of pressure reduction, the predetermined supply amount can be increased. Thus, the supply amount of the resin pellets can be adjusted by controlling the pressure in the injection molding chamber or the storage and / or the heating temperature of the pellets.

A gas from the outside of the injection molding apparatus, for example, air in the atmosphere or an inert gas is supplied into the injection molding chamber. The air from the atmosphere is supplied from the side opposite to the injection hole of the injection molding machine, for example, from the other end. In a commonly used 50 ton injection molding machine manufactured by FANUC, the amount of air intake is about 200N.
1 / min to about 300 Nl / min. Here, the gas has an effect of absorbing moisture and gas discharged from the molten pellet.

The water and gas released from the resin pellets in the molten state are discharged from the injection molding device to the atmosphere by the pressure reducing device. That is, moisture or gas existing in the injection molding chamber or the storage is discharged from the injection molding machine to the atmosphere. Since water and gas are completely removed from the injected resin, the molded article does not contain water or gas. The decompression device that constitutes the exhaust device is approximately 100
By adjusting the pressure to Torr or more, preferably about 400 Torr or more, moisture evaporated from the pellets can be discharged to the atmosphere.

Preferably, the decompression device comprises a gas intake pipe below the pellet storage. By disposing a decompression device at this position, moisture and gas discharged from the inside of the injection molding chamber can be efficiently exhausted to the atmosphere, and the pellets can smoothly fall in the pellet supply device.

The method for producing a recycled resin and a recycled resin, preferably a pellet-shaped recycled resin and a recycled resin from a used injection-molded processed product is the same as that described above. In this case, a crushed piece obtained by finely crushing a used workpiece is supplied to a molding chamber, preferably an injection molding chamber. The crushed pieces are melted in the forming chamber. Then, the resin material continuously emerging from the injection hole of the injection molding device is finely cut and formed into a pellet shape.

Articles to be injection-molded by the injection molding apparatus and the injection molding method according to the present invention include functional parts performing passive and active functions by resin molding, pellets for molding machines, and the like.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a cross section of the injection molding apparatus. Here, a recycled resin and a recycled resin, preferably a pellet-shaped recycled resin and a recycled resin. Here, the following resins are used as recycled resins and recycled resins made from used resin molded products. (1) A polyethylene resin, at least two or more thermoplastic resins which are a combination of materials selected from a polyamide resin, a polyester resin, a polypropylene resin, a polyethylene resin, and the like, and an epoxidized (partially hydrogenated) diene Resin consisting of a polymer. (2) A resin obtained by adding a polycondensation catalyst to a polyester resin. (3) A resin composed of ASG resin, urethane resin and PVC resin.
(4) A resin comprising a polyethylene-based resin, a thermoplastic resin, and a saturated styrene-based thermoplastic elastomer having a specific structure or a modified product thereof. (5) Polyolefin resin. (6) Polypropylene resin. (7) ABS (acrylonitrile-butadiene-styrene) resin. (8) A polycarbonate resin mixed with a silicon compound.

An injection molding machine and an injection molding method for producing an injection molded product using the above-mentioned recycled resin and recycled resin will be described below. In the figure, reference numeral 10 denotes an injection molding device. In the injection molding apparatus, a heater 12 is provided outside the injection molding apparatus. The temperature of the heater 12 is set to 280 ° C. The cylinder has an injection molding chamber 14 therein. The injection molding chamber 14 has a screw 16 for stirring the resin pellets therein.
It has.

The screw 16 has a metering zone 18, a compression zone 20 and a feed zone 22. The metering band 18
Is the shallowest part of the screw. Thus, a large shearing force is applied to the resin pellets in the measuring zone 18. The pellet is raised to a homogeneous temperature with self-heating. In the zone, the resin pellets are melted and kneaded. By this action, a certain amount of resin pellets is sent to the nozzle side. There is a gap between the resin pellets supplied to the compression zone 20. Therefore, when the resin pellets are melted, the volume is reduced to about half. In order to compensate for this decrease in volume, it is necessary to reduce the space through which the resin passes. Therefore, the groove of the screw 16 is formed shallow. This has the effect of compressing the molten resin pellets to increase the heat generation effect and increase the resin pressure. The supply zone 22 sends the resin to the compression zone as a solid or a part of the resin dissolved. In addition, an injection port 24 is provided at one end of a cylinder of the injection molding machine, and an opening 2 for taking in atmospheric air is provided at the other end.
6 is provided.

Numeral 34 denotes a reservoir, and the resin pellets, preferably a predetermined amount of dry resin pellets, are supplied through the reservoir 34 to the injection molding chamber 1.
4. Reference numeral 38 denotes a decompression device.
The pressure reducing device 38 includes a vacuum pump 40. Exhaust port 42
Is mounted below the pellet storage 34.
The decompression device 38 has a function of sucking a gas containing water and gas generated from the molten pellets and exhausting the gas to the atmosphere. At this time, the degree of vacuum of the pressure reducing device is about 100 Torr or more, preferably about 400 Torr or more.

The predetermined supply amount of the resin pellet is determined from the supply amount of the pellet, the pressure in the injection molding chamber, the heating temperature of the pellet, and the like. The predetermined supply amount of pellets can be increased by heating the resin pellets under a reduced pressure at a predetermined supply amount.

Usually, since the rotation of the screw 16 in the injection molding chamber is hardly constantly performed, if the predetermined amount of the resin pellets is continuously supplied into the injection molding chamber, the injection is stopped. Resin pellets overflow from the molding chamber and begin to accumulate in the reservoir. If this state continues, exhaust of water, gas, and the like generated from the resin pellets during the melting process in the injection molding chamber is blocked.

As a result, moisture and gas are not exhausted to the outside even if the decompression device 38 is used, and moisture remains in the resin pellets, so that a high quality molded product cannot be obtained. Therefore, the detection device 44 is attached to a predetermined position in the storage body, and it is detected that the resin pellets have been deposited from the injection molding chamber at the predetermined position of the storage body 34, and information indicating that the inside of the injection molding chamber has exceeded a predetermined amount. Is transmitted to the pellet supply amount adjusting device 50 via a control device (not shown). For example, when resin pellets exceeding 125 cc are supplied into the injection molding chamber in a 50-ton injection molding machine, the resin pellets overflow from the injection molding chamber. When this signal is transmitted to the adjusting device, the adjusting device 50 adjusts the supply amount so that the resin pellet does not always overflow the injection molding chamber by a predetermined amount. Thus, there is always a certain amount of pellets in the injection molding chamber.

The detecting device 44 may have any function as long as it has a function of detecting that the pellet has reached a predetermined deposition position. For example, a level sensor is used as the detection device 44. Further, the detection device 44 is attached to the storage body 34, but the screw supply zone 22 is
Is preferably installed in the vicinity. The closer to the supply zone, the sooner the amount of pellets in the supply zone can be detected. That is, since the information that the pellets have overflowed from the supply zone can be transmitted to the pellet supply amount adjustment device quickly, the supply amount from the pellet supply amount adjustment device 50 can be quickly adjusted. In this way, it is possible to keep a constant amount of pellets in the supply zone while minimizing the state in which the pellets overflow from the supply zone.

The pellet feed rate adjusting device 50 is provided inside the pellet storage body 34. The adjusting device 50 includes a spiral supply unit 54 having a predetermined pitch provided at one end of the rotating shaft 52 and a drive motor 56 attached to the other end. Then, the pellets are conveyed through the gap of the spiral supply unit 54. At this time, the feed rate of the pellets conveyed through the spiral gap is adjusted by adjusting the rotation speed and / or pitch of the rotating shaft. Note that the pellet supply amount adjusting device 50 is not limited to the above-described configuration, and various adjusting mechanisms, for example, an adjusting blade for adjusting the diameter of the pellet supply path may be provided. Further, the pellet supply amount adjusting device 50 may be provided independently of the pellet storage body 34. Furthermore, the supply amount of the resin pellets can be adjusted by controlling the pressure in the injection molding chamber or the storage and / or the heating temperature of the pellets.

Reference numeral 58 denotes a heating device for preliminarily heating the resin pellets when the resin pellets pass through the storage body 34. This resin pellet is, for example, about 30 ° C at 60 ° C.
By preheating and heating for a minute, a good injection molded product can be obtained even if the supply amount of pellets per unit time is large and the degree of pressure reduction is low. In this case, a non-defective product can be obtained even if the degree of pressure reduction is 100 Torr or less by appropriately adjusting the supply amount.

The gas supply means is the opening 60 provided at the other end of the cylinder of the injection molding machine opposite to the injection hole as described above. In addition, an introduction port may be provided near the supply zone of the screw in order to introduce a gas such as air from the outside of the cylinder. Further, the gas introduced into the cylinder may be an inert gas other than air. Further, the gas is preferably heated. The air supply rate in a 50 ton injection molding apparatus manufactured by FANUC which is usually used is about 200 Nl / min to about 300 N
1 / min.

The apparatus and method for producing a recycled resin, a recycled resin, preferably a pellet-shaped recycled resin and a recycled resin from a used injection-molded molded product are the same as those described above, and therefore description thereof is omitted. . In this case, a crushed piece obtained by finely crushing a used workpiece is supplied to a molding chamber, preferably an injection molding chamber. The crushed pieces are melted in the forming chamber. Then, the resin material continuously coming out of the injection hole of the injection molding machine is finely cut and formed into a pellet shape.

The present invention is not limited to this embodiment and can include various modified configurations.

[0052]

According to the present invention, it is possible to produce a recycled resin completely free of gas and moisture from a used resin molded product, and further to produce a molded product free of gas and moisture using recycled resin and recycled resin. it can. Thus, it is possible to completely remove water and gas in the resin as well as to help protect the environment, and it is possible to completely remove water and gas in a short time. The strength of the injection molded product is increased. Further, since the life of the mold can be prolonged and the number of times of cleaning can be reduced, the operation efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of an injection molding apparatus and a recycled resin production apparatus according to the present invention.

[Explanation of symbols]

 Reference Signs List 1; recycled resin, recycled resin 10; injection molding device, recycled resin production device 12; heater 14, injection molding chamber 16, screw 24, injection port 26, opening 20, compression zone 22, supply zone 40, vacuum pump 34, storage Body 38; decompression device 44; detection device 50; resin supply amount adjustment device, resin constant supply device 58;

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B29K 105: 26

Claims (22)

[Claims] 1. A recycle resin and a recycled resin supplied into an injection molding chamber are melted while being stirred in the injection molding chamber, and the molten resin is injected from an injection hole provided at one end of the injection molding chamber. In an injection molding apparatus, a resin fixed amount supply device for supplying a predetermined supply amount of the resin from the pressure in at least the injection molding chamber and / or the reservoir into the injection molding chamber; and An injection molding apparatus, comprising: a decompression device for discharging a gas containing water and gas evaporated from the resin in a melting process. 2. The reclaimed resin and recycled resin supplied into the injection molding chamber are melted while being stirred in the injection molding chamber, and the molten resin is injected from an injection hole provided at one end of the injection molding chamber. A detection device for detecting that a predetermined amount or more of the resin has been supplied into the injection molding chamber, and supplying the resin to the injection molding chamber based on information from the detection device. An injection molding apparatus comprising: a resin supply amount adjusting device for adjusting the amount; and a decompression device for exhausting a gas containing water evaporated from the resin in a melting process in the injection molding chamber. 3. The injection molding apparatus according to claim 1, further comprising a gas supply unit. 4. The injection molding apparatus according to claim 1, further comprising a heating device for heating the resin before being supplied to the injection molding chamber. 5. The injection molding apparatus according to claim 1, further comprising a removing device for removing a gas containing water discharged from the pressure reducing device. 6. A step of supplying a predetermined amount of renewed resin or recycled resin into the injection molding chamber at a predetermined supply amount based on at least the pressure in the injection molding chamber and / or the reservoir, and the step of melting the injection molding chamber. Injection including a step of exhausting a gas containing water and gas evaporated from the resin to the outside of the injection molding machine, and a step of extruding the resin melted in the injection molding machine from the other end of the injection molding machine and injecting the resin into a mold. Molding method. 7. A step of supplying a recycled resin and a recycled resin to an injection molding chamber; a step of detecting that a predetermined amount or more of the resin has been supplied into the injection molding chamber; A step of adjusting the supply amount of the resin into the injection molding chamber, a step of exhausting a gas containing moisture and gas evaporated from the resin in the melting process of the injection molding chamber to the outside of the injection molding machine, Extruding the molten resin from the other end of the injection molding machine and injecting it into a mold. 8. The injection molding method according to claim 6, further comprising a step of supplying a gas. 9. The injection molding method according to claim 6, further comprising a heating step for heating the resin. 10. The injection molding method according to claim 6, further comprising a removing step of removing a gas containing water discharged from the pressure reducing device. 11. A reclaimed resin manufacturing apparatus for melting a used resin pulverized product in a molding chamber and discharging the regenerated resin from an outlet hole provided at one end of the molding chamber, wherein at least the molding chamber and / or storage is performed. A resin pulverized material quantitative supply device for supplying a predetermined supply amount of the resin pulverized material from the pressure in the body into the molding chamber; and moisture evaporating from the resin pulverized material in a melting process of the molding chamber. And a pressure reducing device for discharging a gas containing a gas. 12. A reclaimed resin production apparatus for melting a used resin pulverized product in a molding chamber and discharging a regenerated resin from an outlet hole provided at one end of the molding chamber. A detection device for detecting that a fixed amount or more of the resin pulverized material has been supplied, and a resin pulverized material supply for adjusting a supply amount of the resin pulverized material to a molding chamber based on information from the detection device An apparatus for producing recycled resin, comprising: an amount adjusting device; and a decompression device for exhausting a gas containing moisture evaporated from the resin pulverized material in a process of melting the molding chamber. 13. The recycled resin production apparatus according to claim 11, further comprising a gas supply unit. 14. The recycled resin production apparatus according to claim 11, further comprising a heating device for heating the recycled resin pulverized material before being supplied to the molding chamber. 15. The recycled resin manufacturing apparatus according to claim 11, further comprising a removing device for removing a gas containing water discharged from the pressure reducing device. 16. A step of crushing a used resin molded product, a step of supplying the resin crushed product to a molding chamber, and detecting that a predetermined amount or more of the resin crushed product is supplied into the molding chamber. Adjusting the supply amount of the resin pulverized product into the molding chamber based on the detection information; and forming a gas containing water and gas evaporated from the resin pulverized material in the melting process of the injection molding chamber. A method for producing a recycled resin, comprising: a step of exhausting air out of the mold; and a step of discharging resin melted in a molding chamber from the other end of the molding machine. 17. A step of pulverizing a used resin molded product, and supplying a predetermined supply amount of the resin pulverized product into the injection molding chamber determined in advance from at least the pressure in the injection molding chamber and / or the reservoir. Exhausting a gas containing moisture and gas evaporated from the resin pulverized material during the melting process of the injection molding chamber out of the molding chamber,
Removing the molten resin in the molding machine from the other end of the molding chamber. 18. The method for producing a recycled resin according to claim 16, further comprising a step of supplying a gas. 19. The method according to claim 16, further comprising a heating step for heating the resin pulverized material.
8. The method for producing a recycled resin according to 7. 20. The injection molding method according to claim 16, further comprising a removing step of removing a gas containing water discharged from the pressure reducing device. 21. An injection molded article produced by the injection molding machine according to claim 1 or 2 or the injection molding method according to claim 6 or 7. 22. A recycled resin manufactured by the recycled resin manufacturing apparatus according to claim 11 or the recycled resin manufacturing method according to claim 16 or 17.