Injection molding system, method for recovering carbon dioxide leaking from injection molding system, and method for installing carbon dioxide collection device and recovery device on an injection molding machine.

Abstract

To provide an injection molding system capable of suppressing carbon dioxide emission.SOLUTION: An injection molding system 1 has: an injection molding machine 2 onto which a mold M is mounted; at least one collection device 4 mounted near at least one of outflow portions F1 to F3 from which carbon-dioxide-containing gas inside a cavity C of the mold M or the injection molding machine 2 can flow out, to collect the carbon-dioxide-containing gas flowing out of the at least one of outflow portions F1 to F3; at least one recovery device 5 for recovering carbon dioxide contained in the carbon-dioxide-containing gas collected from the at least one collection device 4.SELECTED DRAWING: Figure 1A

Description

Technical Field

[0001] The present invention relates to an injection molding system, a method for recovering carbon dioxide discharged from an injection molding system, and a method for installing a carbon dioxide collection device and a carbon dioxide recovery device in an injection molding machine. Background Art

[0002] During operation of an injection molding machine, high-temperature and high-pressure gas may be generated inside a mold. Patent Document 1 describes that a gas containing carbon dioxide is generated from a resin under a high-temperature environment. Prior Art Documents Patent Documents

[0003] Patent Document 1 Japanese Unexamined Patent Publication No. 2019-059030 Summary of the Invention Problems to be Solved by the Invention

[0004] Carbon dioxide generated during operation of an injection molding machine is released into the atmosphere without being recovered. On the other hand, in recent years, reduction of carbon dioxide emissions has been demanded from the perspective of preventing global warming. An object of the present disclosure is to provide an injection molding system capable of suppressing carbon dioxide emissions. Means for Solving the Problems

[0005] An injection molding system according to one aspect comprises: at least one collection device attached near at least one outflow portion from which carbon dioxide-containing gas can flow out, the collection device collecting the carbon dioxide-containing gas flowing out from the at least one outflow portion; and at least one recovery device recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device. At least one outflow is a plurality of outflows, at least one collection device is a plurality of collection devices, each collecting carbon dioxide from each of the plurality of outflows, at least one recovery device is a plurality of recovery devices, and each of the plurality of outflows is combined with each of the plurality of recovery devices and each of the plurality of collection devices. Effects of the Invention

[0006] According to this disclosure, it is possible to provide an injection molding system that can reduce carbon dioxide emissions. [Brief explanation of the drawing]

[0007] [Figure 1A] This is a schematic front view of the injection molding system according to the first embodiment. [Figure 1B] This is a schematic side view of the injection molding system according to the first embodiment. [Figure 2] This is a conceptual diagram showing the vicinity of the mold. [Figure 3] This is a conceptual diagram showing the configuration of the carbon dioxide collection device and recovery device for the injection molding system according to the first embodiment. [Figure 4A] This is a schematic front view of an example of a suction section. [Figure 4B] This is a schematic side view of an example of a suction section. [Figure 5] This is a conceptual diagram showing the configuration of the carbon dioxide collection and recovery devices for a modified injection molding system. [Figure 6] This is a flowchart showing the operation method of the injection molding system according to the first embodiment. [Figure 7] This is a conceptual diagram showing the configuration of the carbon dioxide collection device and recovery device for the injection molding system according to the second embodiment. [Figure 8] This is a flowchart showing the operation method of the injection molding system according to the second embodiment. [Figure 9] This is a conceptual diagram showing the vicinity of the mold in a modified form. [Modes for carrying out the invention]

[0008] (First Embodiment) Figures 1A and 1B show a schematic front view and a schematic side view of the injection molding system 1 according to the first embodiment, respectively. Figure 2 is an enlarged view of the vicinity of the mold, and Figure 3 conceptually shows the configuration of the carbon dioxide collection device 4 and recovery device 5.

[0009] <Overall Structure> Referring to Figures 1A and 1B, the injection molding system 1 comprises an injection molding machine 2 to which a mold M is attached, one carbon dioxide collection device 4 (hereinafter sometimes referred to as collection device 4), one carbon dioxide recovery device 5 (hereinafter sometimes referred to as recovery device 5), and control devices 6 for collection device 4 and recovery device 5. The injection molding machine 2 is generally composed of a clamping device 21 for clamping the mold M and an injection device 31 for melting and injecting the material to be injected.

[0010] <Mold clamping device 21> The clamping device 21 includes a fixed platen 23 fixed on the bed 22 and to which a fixed mold M1 is attached, a clamping housing 25 that can slide on the bed 22, and a movable platen 24 that can slide on the bed 22 and to which a movable mold M2 is attached. The fixed platen 23 and the clamping housing 25 are connected by a number of tie bars 26. A clamping mechanism 27 for opening and closing the mold M is provided between the movable platen 24 and the clamping housing 25. The clamping mechanism 27 is composed of a toggle mechanism. Although not shown in the figures, the clamping mechanism 27 may also be composed of a direct pressure type clamping mechanism, that is, a hydraulic clamping cylinder.

[0011] <Injection device 31> The injection device 31 is mounted on a base 32. The injection device 31 comprises a heating cylinder 33, a screw 34 housed in the heating cylinder 33, and a drive mechanism 35 that drives the screw 34. The screw 34 is rotationally driven and driven in the axial direction X by the drive mechanism 35. The drive mechanism 35 is covered by a cover 36. A hopper 37 for supplying the material to be injected is provided near the rear end of the heating cylinder 33. The hopper 37 has a material supply opening 37A into which the material to be injected is supplied. An injection nozzle 38 is provided at the tip of the heating cylinder 33.

[0012] The injection device 31 includes a nozzle touch device 39. The nozzle touch device 39 advances the injection device 31, whereby the injection nozzle 38 touches the sprue bush M3 (see FIG. 2) of the mold M. The nozzle touch device 39 connects the drive mechanism 35 and the fixed platen 23. The nozzle touch device 39 is configured by, for example, a mechanism using a hydraulic cylinder or a mechanism using a ball screw.

[0013] <Mold M> Referring to FIG. 2, a cavity C filled with resin is formed between the fixed mold M1 and the movable mold M2. When the mold M is closed, the gas in the cavity C is discharged from a vent opening provided in the mold M. Although the position and number of the vent openings vary depending on the size and configuration of the mold M, at least one vent opening (an example of an atmosphere communication portion of the mold M) is provided in at least one of the fixed mold M1 and the movable mold M2. In the present embodiment, one vent opening M4 and one vent opening M5 are provided in the fixed mold M1 and the movable mold M2, respectively. Although the vent openings M4 and M5 may be covered with a safety cover, they are open to the atmosphere.

[0014] <Carbon dioxide collecting device 4> Referring to FIGS. 1A and 1B, during operation of the injection molding machine 2, carbon dioxide-containing gas exists inside the cavity C of the mold M and inside the injection molding machine 2. This carbon dioxide-containing gas can flow out to the outside from specific portions of the mold M and the injection molding machine 2 (hereinafter referred to as outflow portions). The collecting device 4 is attached near the outflow portion and collects the carbon dioxide-containing gas flowing out from the outflow portion.

[0015] The outflow portions of the carbon dioxide-containing gas are mainly the gap (parting line) between the fixed mold M1 and the movable mold M2, the material supply opening 37A of the hopper 37, and the vent openings M4 and M5 of the mold M. The gap between the fixed mold M1 and the movable mold M2 is referred to as a mold outflow portion F1, the material supply opening 37A of the hopper 37 is referred to as a hopper outflow portion F2, and the vent openings M4 and M5 of the mold M are referred to as a vent outflow portion F3.

[0016] Carbon dioxide-containing gas mainly leaks from the mold outlet F1 when the mold opens. Carbon dioxide-containing gas may be generated and accumulated in the cavity C due to the combustion of the resin, and this carbon dioxide-containing gas leaks out of the mold M when the mold opens. However, in order to suppress the occurrence of burning, the mold M may be temporarily opened during molding, and in this case, carbon dioxide-containing gas may leak from between the fixed mold M1 and the movable mold M2 even during operation. In particular, if the clamping device 21 is hydraulic, some mold opening may occur due to the reaction force of the oil even when the mold M is closed.

[0017] The amount of carbon dioxide generated in cavity C depends on the degree of resin burning; a greater degree of burning results in a greater amount of carbon dioxide, while a lesser degree of burning results in a smaller amount of carbon dioxide.

[0018] The hopper outlet F2 primarily discharges carbon dioxide-containing gas generated during the metering of injection material. Specifically, during the metering of injection material, the material is plasticized by the screw 34 inside the heating cylinder 33, generating carbon dioxide-containing gas. Because the hopper outlet F2 is in communication with the inside of the heating cylinder 33, the generated carbon dioxide-containing gas flows back and discharges from the hopper outlet F2. The amount of carbon dioxide-containing gas discharged from the hopper outlet F2 is greater than that from the other outlets F1 and F3.

[0019] As described above, when the mold M is closed, the gas in the cavity C is discharged from the vent outlet F3. In other words, the carbon dioxide-containing gas accumulated in the cavity C is discharged from the vent outlet F3. Although the amount of carbon dioxide-containing gas discharged from the vent outlet F3 per unit time is small, the carbon dioxide-containing gas may be discharged continuously or intermittently when the mold M is closed. The amount of carbon dioxide discharged from the vent outlet F3 depends on the degree of resin burning.

[0020] The collection device 4 in this embodiment is a single collection device 4 that collects carbon dioxide-containing gas flowing out from all of the aforementioned outlets F1 to F3. However, it is not essential to collect carbon dioxide-containing gas from all of the aforementioned outlets F1 to F3. The collection device 4 only needs to collect carbon dioxide-containing gas flowing out from at least one outlet.

[0021] Referring to Figure 3, the collection device 4 has a suction pipe 41 for drawing in carbon dioxide-containing gas and a suction pump 42 provided on the suction pipe 41. The suction pipe 41 has suction sections 431 to 433 located near each of the outlet sections F1 to F3, and a connecting end 44 connected to the recovery device 5. Suction section 431 is located near the mold outlet section F1, suction section 432 is located near the hopper outlet section F2, and suction section 433 is located near the vent outlet section F3. The vent openings M4 and M5 (see Figure 1A) are close together and share one suction section 433, but each may have its own dedicated suction section.

[0022] The suction pipe 41 has inlet-side suction pipes 411 to 413 connected to the suction sections 431 to 433, respectively, and an outlet-side suction pipe 414 connected to the connection end 44. The three inlet-side suction pipes 411 to 413 merge to form a single outlet-side suction pipe 414. The suction pipe 41 can be made of vinyl tubing, steel pipe, or the like. The suction pump 42 is installed in the outlet-side suction pipe 414. The suction pump 42 is a vacuum pump that sucks carbon dioxide-containing gas from each of the suction sections 431 to 433 and supplies it to the recovery device 5.

[0023] Figures 4A and 4B show a schematic front view and a schematic side view of the suction section 431, respectively. The suction section 431 has a generally cylindrical shape. Since the suction section 431 is spaced apart from the injection molding machine 2 and the mold M, it is unlikely to affect the operation of the injection molding machine 2. The tip of the suction section 431 is open, and the rear end is connected to the inlet-side suction pipe 411. The suction section 431 is fixed to the main body of the injection molding machine 2 by a fixing device 46 and faces the mold outlet section F1 (see Figure 3) at the angle that maximizes the suction flow rate.

[0024] Referring to Figures 1A and 1B, the suction section 431 is located above the mold M. However, the installation position of the suction section 431 is not limited as long as it is near the mold outlet F1. This is because the vacuum suction pump 42 forcibly sucks in the gas near the suction section 431. The suction section 431 may also be installed below the mold M. Since the specific gravity of carbon dioxide is greater than that of air, carbon dioxide that descends by its own gravity can be efficiently collected. Since the mold outlet F1 is formed along the four sides of the mold M, a cover may be provided to cover the four sides of the mold outlet F1, and the suction section 431 may be connected to this cover. Alternatively, the suction section 431 may have an elongated shape that follows the mold outlet F1.

[0025] The suction section 432 is configured similarly to the suction section 431. However, the suction section 432 is mounted almost vertically to the end of the material supply opening 37A. This makes the material supply to the hopper 37 less susceptible to interference.

[0026] The suction section 433 is configured similarly to the suction section 431. Since the suction section 433 can be positioned close to the vent outlet section F3 (vent openings M4, M5) (see Figures 2 and 3), there are no major constraints regarding the installation angle or position.

[0027] As described above, the suction section 433 is located near the vent outlet F3, but "nearby" includes a configuration in which the suction section 433 is in direct contact with the vent openings M4 and M5. Since the outer surface of the mold M does not become very hot, the suction section 433 can be formed from a heat-resistant tube and directly fixed to the vent openings M4 and M5. This can improve the collection efficiency of carbon dioxide-containing gas. In this case, it is preferable to attach one suction section to each of the vent openings M4 and M5, and to use a flexible inlet suction pipe connected to the vent opening M5 of the movable mold M2.

[0028] Referring to Figure 3, inlet-side carbon dioxide sensors A1 to A3 are provided near the suction sections 431 to 433, respectively. Inlet-side carbon dioxide sensor A1 is provided on the inner wall of the suction section 431 facing the mold outlet section F1, as shown in Figures 4A and 4B. Inlet-side carbon dioxide sensor A2 is provided on the inner wall of the suction section 432 facing the hopper outlet section F2, similar to inlet-side carbon dioxide sensor A1 of the suction section 431. Inlet-side carbon dioxide sensor A3 near the vent outlet section F3 is provided on the inner wall of the mold M, as shown in Figure 2. Specifically, a mounting recess M6 is provided on the inner wall of the fixed mold M1 or the movable mold M2, and the inlet-side carbon dioxide sensor A3 is provided in the recess M6. Inlet-side carbon dioxide sensor A3 may also be provided on the inner wall of the suction section 433.

[0029] The inlet-side carbon dioxide sensors A1 to A3 measure the concentration of carbon dioxide contained in the carbon dioxide-containing gas drawn in from the suction sections 431 to 433. The carbon dioxide concentration measured by the inlet-side carbon dioxide sensors A1 to A3 is sent to the control device 6.

[0030] <Carbon dioxide capture device 5> Referring to Figure 3, the recovery device 5 recovers or removes carbon dioxide contained in the carbon dioxide-containing gas collected from the collection device 4. The recovery device 5 is shared by multiple outlets F1 to F3. The recovery device 5 has a filter 52 impregnated with an amine aqueous solution. The filter 52 is supported by a mesh member 53 attached to a holding container 51. The connecting end 44 of the suction pipe 41 is connected to the inlet end of the holding container 51, and the discharge pipe 54 is connected to the outlet end.

[0031] Since the carbon dioxide absorption efficiency of amines is temperature-dependent, the recovery device 5 has a filter temperature control device 55 that adjusts the temperature of the filter 52. The filter temperature control device 55 utilizes the mold cooling device originally provided by the injection molding machine 2. The mold cooling device has a circulation pipe 56 through which cooling water that cools the mold M circulates, and a cooling water temperature control device 57 installed on the circulation pipe 56 to adjust the temperature of the cooling water. The cooling water that has cooled the mold M becomes warm water (for example, around 60°C) and is discharged from the outlet 28 of the main body of the injection molding machine 2, cooled by the cooling water temperature control device 57, and returned to the main body of the injection molding machine 2 to cool the mold M again. The cooling water temperature control device 57 may be a general heat exchanger.

[0032] The circulation pipe 56 passes through the retaining container 51 between the outlet 28 of the main body of the injection molding machine 2 and the cooling water temperature control device 57. The portion of the circulation pipe 56 inside the retaining container 51 becomes the heating section 58 that heats the filter 52. The heating section 58 constitutes the filter temperature control device 55. With this configuration, existing equipment can be used as the filter temperature control device 55, thus suppressing cost increases.

[0033] The temperature of filter 52 is adjusted to a temperature range in which filter 52 can absorb carbon dioxide contained in the carbon dioxide-containing gas. The preferred temperature range depends on the type of amine. Generally, if the temperature of filter 52 is too high, the captured carbon dioxide will detach from filter 52. Preferably, the temperature of filter 52 is adjusted to a temperature at which the maximum amount of carbon dioxide contained in the carbon dioxide-containing gas is absorbed by filter 52.

[0034] To adjust the temperature of the filter 52, a bypass line 59 that bypasses the holding container 51 is provided in the circulation piping 56, and the temperature of the filter 52 can be adjusted by adjusting the diameter of the bypass line 59. Alternatively, a valve 60 can be provided in the section of the circulation piping 56 between the branch and junction of the bypass line 59, or in the bypass line 59 itself, and the temperature of the filter 52 can be adjusted by adjusting the opening degree of the valve 60.

[0035] The filter 52 captures carbon dioxide and allows other gases to pass through, so the carbon dioxide-containing gas that passes through the filter 52 (hereinafter referred to as the filtered gas) is essentially a gas from which only carbon dioxide has been removed. The filtered gas is discharged into the atmosphere through the discharge pipe 54. The discharge pipe 54 is equipped with an outlet-side carbon dioxide sensor A4 that measures the concentration of carbon dioxide contained in the filtered gas. The outlet-side carbon dioxide sensor A4 is located on the inner wall of the discharge pipe 54. The concentration of carbon dioxide measured by the outlet-side carbon dioxide sensor A4 is sent to the control device 6.

[0036] Figure 5 shows an alternative configuration of the carbon dioxide recovery device 5. The recovery device 7 has a sodium hydroxide aqueous solution supply unit 71 and a carbon dioxide absorption unit 72. The supply unit 71 generates a sodium hydroxide aqueous solution, for example by electrolysis of a sodium chloride aqueous solution, and supplies it to the absorption unit 72.

[0037] In the absorption unit 72, a carbon dioxide-containing gas is supplied to the sodium hydroxide aqueous solution supplied from the supply unit 71. The reaction between sodium hydroxide and carbon dioxide produces an aqueous solution containing sodium carbonate and sodium bicarbonate. As a result, the carbon dioxide contained in the carbon dioxide-containing gas is absorbed into the sodium hydroxide aqueous solution. If carbon dioxide extraction is necessary, for example, hydrochloric acid produced by the electrolysis of a sodium chloride aqueous solution is supplied to the aqueous solution containing sodium carbonate and sodium bicarbonate to extract gaseous carbon dioxide.

[0038] <Methods for capturing carbon dioxide> Figure 6 shows a schematic flowchart of the method for recovering carbon dioxide flowing out of the injection molding system 1. Figures 1A, 1B, 2, and 3 should also be referred to as appropriate for the carbon dioxide recovery method. First, as a starting point, the mold M is attached to the injection molding machine 2, and the operation of the injection molding machine 2 is started (step S1).

[0039] Next, the carbon dioxide concentration is measured using inlet-side carbon dioxide sensors A1 to A3 (see Figure 3) located near each suction section 431 to 433 (step S2). Inlet-side carbon dioxide sensors A2 and A3 near the hopper outlet F2 and vent outlet F3 continuously measure the carbon dioxide concentration. Inlet-side carbon dioxide sensor A1 near the mold outlet F1 only needs to measure the carbon dioxide concentration at least when the mold is open. However, as mentioned above, carbon dioxide may leak even when the mold is not open, so the carbon dioxide concentration may be measured continuously.

[0040] The measured values ​​from each inlet-side carbon dioxide sensor A1 to A3 are sent to the control device 6 (see Figure 1A). The control device 6 determines whether the measured carbon dioxide concentration from any of the inlet-side carbon dioxide sensors A1 to A3 exceeds a predetermined standard value (hereinafter referred to as the discharge standard value) (step S3). If the measured carbon dioxide concentration from any of the inlet-side carbon dioxide sensors A1 to A3 exceeds the discharge standard value (if YES in step S3), the collection device 4 (specifically the suction pump 42) (see Figure 1B, 3) is activated (step S4). If the measured carbon dioxide concentration from any of the inlet-side carbon dioxide sensors A1 to A3 does not exceed the discharge standard value (if NO in step S3), the flow returns to step S2 and continues to monitor the carbon dioxide concentration.

[0041] If the collection device 4 (see Figure 3) is activated in step S4, the carbon dioxide-containing gas is collected by the collection device 4, and the carbon dioxide contained in the carbon dioxide-containing gas is recovered by the recovery device 5 (see Figure 3) (step S5). Gases other than carbon dioxide pass through the filter 52 without being captured. During this time, the carbon dioxide concentration is measured by the outlet-side carbon dioxide sensor A4 installed in the discharge pipe 54. The measured value from the outlet-side carbon dioxide sensor A4 is sent to the control device 6 (see Figure 1A).

[0042] The control device 6 calculates at least one of the carbon dioxide recovery amount and the concentration reduction value from the measurements of the inlet-side carbon dioxide sensors A1 to A3 (see Figure 3) installed in each suction section 431 to 433 and the outlet-side carbon dioxide sensor A4 (see Figure 3) installed in the discharge pipe 54. The carbon dioxide recovery amount can be determined by converting the concentration measurement value from each carbon dioxide sensor to weight. By accumulating the weights, the total carbon dioxide recovery value over a certain period of time can be calculated. By displaying at least one of the total carbon dioxide recovery amount and the concentration reduction value on the display unit 61 (see Figure 1A) of the control device 6, it is possible to visually recognize that carbon dioxide has been recovered.

[0043] The control device 6 monitors whether the carbon dioxide concentration of the outlet carbon dioxide sensor A4 is below a predetermined standard value (hereinafter referred to as the performance standard value) (step S6). The performance standard value is set to a value smaller than the discharge standard value. If the carbon dioxide concentration is below the performance standard value (YES in step S6), the control device 6 determines that the filter 52 is in good condition and can continue to be used, and returns the process to step S2. If the carbon dioxide concentration exceeds the performance standard value (NO in step S6), the control device 6 determines that the filter 52 has reached the end of its lifespan and displays a message on the display unit 61 prompting the replacement of the filter 52 (step S7).

[0044] Filter 52 that has reached the end of its lifespan will be discarded, and a new filter 52 will be installed.

[0045] (Second embodiment) Figure 7 conceptually shows the configuration of the carbon dioxide collection device 4 and recovery device 5 of the injection molding system 1 according to the second embodiment. In this embodiment, the configuration of the injection molding machine 2 is the same as in the first embodiment, so its description is omitted.

[0046] In this embodiment, multiple collection devices 4A to 4C and multiple recovery devices 5A to 5C are provided. Each of the multiple collection devices 4A to 4C is configured to collect carbon dioxide flowing out from at least one outlet. Furthermore, the recovery devices 5A to 5C are configured so that carbon dioxide flowing out from all outlets F1 to F3 is recovered by one of the recovery devices. In this embodiment, each of the multiple recovery devices 5A to 5C is combined with each of the multiple collection devices 4A to 4C. The carbon dioxide recovery device 5 can be configured as shown in Figure 3 or as shown in Figure 5.

[0047] Collection device 4A has a suction pipe 451, collection device 4B has a suction pipe 452, and collection device 4C has a suction pipe 453. Suction pipe 451 has a suction section 431 and a connecting end 441 located near the outlet section F1. Suction pipe 452 has a suction section 432 and a connecting end 442 located near the outlet section F2. Suction pipe 453 has a suction section 433 and a connecting end 443 located near the outlet section F3. The connecting ends 441 to 443 are each connected to recovery devices 5A to 5C, which are combined with collection devices 4A to 4C. The recovery devices 5A to 5C are each connected to discharge pipes 541 to 543.

[0048] Each collection device 4A to 4C has a suction pump 421 to 423 installed in the suction pipe 451 to 453. Each suction pump 421 to 423 draws carbon dioxide-containing gas from the suction section 431 to 433 and supplies it to the recovery device 5A to 5C, which is combined with the collection devices 4A to 4C. The configuration of the suction section 431 to 433 is the same as in the first embodiment. The inlet-side carbon dioxide sensors A1 to A3 are installed in the suction section 431 to 433 of each collection device 4A to 4C, as in the first embodiment. The outlet-side carbon dioxide sensors A4 to A6 are installed in the discharge pipe 541 to 543, respectively.

[0049] Figure 8 shows a schematic flow chart of the method for recovering carbon dioxide leaking from the injection molding system 1. The basic operation flow is the same as in the first embodiment, so the differences from the first embodiment will be explained in detail. Here, we will describe the case of processing carbon dioxide-containing gas leaking from the mold outlet F1 and hopper outlet F2, but the same applies to processing carbon dioxide-containing gas leaking from the vent outlet F3.

[0050] Once the injection molding machine 2 starts operation (step S11), the carbon dioxide concentration is measured by inlet-side carbon dioxide sensors A1 and A2 located near the mold outlet F1 and hopper outlet F2 (see Figure 7) (steps S12, S22). Subsequent steps S13-S17 and S23-S27 are the same as steps S3-S7 of the first embodiment. The lifespan of each filter 52 is determined individually.

[0051] In this embodiment, since carbon dioxide-containing gas is collected and carbon dioxide is recovered from the carbon dioxide-containing gas at each outlet, the amount of carbon dioxide recovered can also be determined for each outlet. Therefore, the display unit 61 of the control device 6 (see Figure 1A) can display the total amount of carbon dioxide recovered and the concentration reduction value for each outlet. It is also possible to understand how much carbon dioxide is leaking from each outlet. For example, it is easier to take measures such as using a larger filter 52 to process the carbon dioxide-containing gas from outlets with a large leak rate, which leads to more efficient replacement of the filter 52.

[0052] (Effects in specific injection molding methods) In physical foaming, a type of foam molding method, approximately 1-3% of the molded product's weight in gas is intentionally introduced into the resin. Nitrogen and carbon dioxide are typical examples of introduced gases. However, about half of the introduced gas is not incorporated into the resin and is released to the outside. Therefore, physical foaming may result in greater carbon dioxide leakage compared to general injection molding, and this disclosure is suitably applicable to physical foaming.

[0053] Furthermore, this disclosure is suitably applicable to the counterpressure method, which is one of the foam molding methods. Figure 9 shows a mold M used in the counterpressure method. The fixed mold M1 is provided with a flow path 101 that communicates with the cavity C, and the flow path 101 is connected to a flow path 102 outside the fixed mold M1. The flow path 102 is connected to a high-pressure gas source 103. A flow path 104 branches off from the flow path 102, and valves 105 and pressure reducing valves 106 are provided in the flow path 102 and the flow path 104, respectively. The tip of the flow path 104 is an open end 107 that is exposed to the atmosphere.

[0054] In the counterpressure method, valve 105 is opened and high-pressure gas is filled into cavity C from high-pressure gas source 103, after which resin material is injected. Then valve 105 is closed, pressure reducing valve 106 is opened, and gas is discharged from atmospheric outlet 107, forcibly lowering the pressure in cavity C.

[0055] From the atmospheric opening end 107, not only the injected high-pressure gas but also the carbon dioxide-containing gas generated in the cavity C is released simultaneously. Therefore, by providing a carbon dioxide intake section 434 near the atmospheric opening end 107 (an example of an atmospheric communication section of the mold M) connected to the pressure reducing valve 106, the carbon dioxide-containing gas flowing out from the atmospheric opening end 107 can be efficiently collected. Note that "nearby" includes providing the carbon dioxide intake section 434 in close contact with the atmospheric opening end 107.

[0056] (Method for installing carbon dioxide collection device 4 and recovery device 5 on injection molding machine 2) According to this disclosure, a collection device 4 and a recovery device 5 can also be installed on an existing injection molding machine 2. Specifically, at least one collection device 4 for collecting carbon dioxide-containing gas flowing out from the cavity C of the mold M or from inside the injection molding machine 2 is provided near at least one outlet F1 to F3. Then, at least one recovery device 5 is provided for recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device 4. By this method, an injection molding system 1 that can suppress carbon dioxide emissions can be configured without making any special changes to the existing injection molding machine 2.

[0057] (Note) This specification includes the following disclosures. [Configuration 1] An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, An injection molding system comprising at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device. [Configuration 2] The injection molding system according to configuration 1, wherein the at least one outlet is a plurality of outlets, the at least one collection device is a single collection device that collects carbon dioxide from all of the outlets, and the at least one recovery device is a single recovery device. [Configuration 3] The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The injection molding system according to configuration 2, further comprising a pump provided in the suction pipe for drawing the carbon dioxide-containing gas from the suction port and supplying it to the recovery device from the connecting end. [Structure 4] The injection molding system according to configuration 1, wherein the at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. [Composition 5] Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The injection molding system according to configuration 4, further comprising a pump provided in the suction pipe for drawing the carbon dioxide-containing gas from the suction port and supplying it from the connecting end to the recovery device combined with the collection device. [Composition 6] The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. The injection molding system according to configuration 3 or 5, wherein the suction port is provided between the fixed platen and the movable platen. [Composition 7] The injection molding machine has a hopper for supplying the material to be injected, The injection molding system according to configuration 3 or 5, wherein the suction port is provided near the hopper. [Structure 8] The injection molding system according to configuration 3 or 5, wherein the intake port is provided near the atmospheric communication portion of the mold. [Composition 9] The injection molding system according to configuration 8, wherein the atmospheric communication portion is a vent opening of the mold. [Configuration 10] The aforementioned mold is used in the counterpressure method. The injection molding system according to configuration 8, wherein the atmospheric communication section is an open end to the atmosphere connected to the cavity via a pressure reducing valve. [Composition 11] An injection molding system according to any one of configurations 1 to 10, comprising an inlet-side carbon dioxide sensor provided near the outlet, wherein the recovery device is activated when the concentration of carbon dioxide measured by the inlet-side carbon dioxide sensor exceeds a standard value. [Composition 12] The injection molding system according to configuration 11, further comprising an outlet-side carbon dioxide sensor provided at the outlet of the recovery device, and calculating the amount of carbon dioxide recovered or the amount of carbon dioxide concentration reduction based on the carbon dioxide concentration measured by the inlet-side carbon dioxide sensor and the carbon dioxide concentration measured by the outlet-side carbon dioxide sensor. [Composition 13] The injection molding system according to any one of configurations 1 to 12, wherein the at least one recovery device comprises a filter impregnated with an amine aqueous solution and a filter temperature control device for adjusting the temperature of the filter. [Composition 14] The injection molding machine includes a circulation pipe through which cooling water for cooling the mold circulates, and a cooling water temperature control device installed on the circulation pipe for adjusting the temperature of the cooling water. The injection molding system according to configuration 13, wherein the circulation piping has a heating section for heating the filter between the outlet from the injection molding machine and the cooling water temperature control device, and the filter temperature control device is the heating section. [Composition 15] The at least one recovery device is, A sodium hydroxide aqueous solution supply unit, An absorption unit supplies the carbon dioxide-containing gas to the sodium hydroxide aqueous solution supplied from the supply unit, and absorbs the carbon dioxide contained in the carbon dioxide-containing gas into the sodium hydroxide aqueous solution. An injection molding system according to any one of configurations 1 to 12, comprising: [Method 1] The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) The carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device is recovered by at least one recovery device. A method for recovering carbon dioxide leaking from an injection molding system, comprising [the specified element]. [Method 2] The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out of the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. A method for installing a carbon dioxide collection device and recovery device to an injection molding machine, comprising the above. [Explanation of Symbols]

[0058] 1. Injection molding system 2 Injection molding machine 4,4A~4C Collection device 5,5A~5C Recovery device 6. Control device 23 Fixed plate 24 Movable plate 41,451~453 Suction pipe 42,421~423 Suction pump 431-433 Suction section 44,441~443 Connection ends 52 Filters 55 Filter temperature control device 56 Circulation piping 57 Cooling water temperature adjustment device 58 Heating section 71 Supply section for sodium hydroxide aqueous solution 72 Carbon dioxide absorption section A1-A6 Carbon Dioxide Sensor F1 Mold Outlet Section F2 Hopper Outlet F3 Vent Outlet M mold M1 Fixed mold M2 movable mold M4, M5 vent opening

Claims

1. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, An injection molding system in which the at least one outlet is a plurality of outlets, the at least one collection device is a plurality of collection devices, each collecting carbon dioxide from each of the plurality of outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of outlets is combined with each of the plurality of recovery devices and each of the plurality of collection devices.

2. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The injection molding system according to claim 1, further comprising: a pump provided in the suction pipe for drawing the carbon dioxide-containing gas from the suction port and supplying it from the connecting end to the recovery device combined with the collection device.

3. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. The aforementioned suction port is provided between the fixed platen and the movable platen in an injection molding system.

4. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. The aforementioned suction port is provided between the fixed platen and the movable platen in an injection molding system.

5. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The injection molding machine has a hopper for supplying the material to be injected, The aforementioned suction port is located near the hopper in the injection molding system.

6. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The injection molding machine has a hopper for supplying the material to be injected, The aforementioned suction port is located near the hopper in the injection molding system.

7. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The aforementioned suction port is provided near the atmospheric communication portion of the mold in this injection molding system.

8. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The aforementioned suction port is provided near the atmospheric communication portion of the mold in this injection molding system.

9. The injection molding system according to claim 7 or 8, wherein the atmospheric communication portion is a vent opening of the mold.

10. The aforementioned mold is used in the counterpressure method. The injection molding system according to claim 7 or 8, wherein the atmospheric communication portion is an atmospheric opening end connected to the cavity via a pressure reducing valve.

11. An injection molding machine on which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, An injection molding system having an inlet-side carbon dioxide sensor located near the outlet, wherein the recovery device is activated when the concentration of carbon dioxide measured by the inlet-side carbon dioxide sensor exceeds a standard value.

12. The injection molding system according to claim 11, further comprising an outlet-side carbon dioxide sensor provided at the outlet of the recovery device, wherein the amount of carbon dioxide recovered or the amount of carbon dioxide concentration reduction is calculated based on the carbon dioxide concentration measured by the inlet-side carbon dioxide sensor and the carbon dioxide concentration measured by the outlet-side carbon dioxide sensor.

13. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one recovery device is an injection molding system comprising a filter impregnated with an amine aqueous solution and a filter temperature control device for adjusting the temperature of the filter.

14. The injection molding machine includes a circulation pipe through which cooling water for cooling the mold circulates, and a cooling water temperature control device installed on the circulation pipe for adjusting the temperature of the cooling water. The injection molding system according to claim 13, wherein the circulation piping has a heating section for heating the filter between the outlet from the injection molding machine and the cooling water temperature control device, and the filter temperature control device is the heating section.

15. An injection molding machine to which a mold is attached, At least one collection device is attached near at least one outlet from which carbon dioxide-containing gas can escape from the cavity of the mold or inside the injection molding machine, and collects the carbon dioxide-containing gas flowing out from the at least one outlet, The system includes at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from the at least one collection device, The at least one recovery device is, A sodium hydroxide aqueous solution supply unit, An absorption unit supplies the carbon dioxide-containing gas to the sodium hydroxide aqueous solution supplied from the supply unit, and absorbs the carbon dioxide contained in the carbon dioxide-containing gas into the sodium hydroxide aqueous solution. An injection molding system having [a specific feature / feature].

16. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, A method for recovering carbon dioxide leaking from an injection molding system, wherein the at least one outlet is a plurality of outlets, the at least one collection device is a plurality of collection devices, each collecting carbon dioxide from each of the plurality of outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of outlets is combined with each of the plurality of recovery devices and each of the plurality of collection devices.

17. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. A method for recovering carbon dioxide flowing out of an injection molding system, wherein the suction port is provided between the fixed platen and the movable platen.

18. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. A method for recovering carbon dioxide flowing out of an injection molding system, wherein the suction port is provided between the fixed platen and the movable platen.

19. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The injection molding machine has a hopper for supplying the material to be injected, A method for recovering carbon dioxide flowing out of an injection molding system, wherein the intake port is provided near the hopper.

20. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The injection molding machine has a hopper for supplying the material to be injected, A method for recovering carbon dioxide flowing out of an injection molding system, wherein the intake port is provided near the hopper.

21. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, A method for recovering carbon dioxide flowing out of an injection molding system, wherein the intake port is provided near the atmospheric communication section of the mold.

22. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, A method for recovering carbon dioxide flowing out of an injection molding system, wherein the intake port is provided near the atmospheric communication section of the mold.

23. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, A method for recovering carbon dioxide leaking from an injection molding system, comprising an inlet-side carbon dioxide sensor provided near the outlet, wherein the recovery device is activated when the concentration of carbon dioxide measured by the inlet-side carbon dioxide sensor exceeds a standard value.

24. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, A method for recovering carbon dioxide flowing out of an injection molding system, wherein the at least one recovery device comprises a filter impregnated with an amine aqueous solution and a filter temperature control device for adjusting the temperature of the filter.

25. The following steps (A) Collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in an injection molding machine to which a mold is attached, using at least one collection device attached near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Recovering the carbon dioxide contained in the carbon dioxide-containing gas collected from at least one collection device using at least one recovery device. It has, The at least one recovery device is, A sodium hydroxide aqueous solution supply unit, An absorption unit supplies the carbon dioxide-containing gas to the sodium hydroxide aqueous solution supplied from the supply unit, and absorbs the carbon dioxide contained in the carbon dioxide-containing gas into the sodium hydroxide aqueous solution. A method for recovering carbon dioxide leaking from an injection molding system, comprising [the specified element].

26. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, A method for installing a carbon dioxide collection device and a carbon dioxide recovery device on an injection molding machine, wherein the at least one outlet is a plurality of outlets, the at least one collection device is a plurality of collection devices, each collecting carbon dioxide from each of the plurality of outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of outlets is combined with each of the plurality of recovery devices and each of the plurality of collection devices.

27. ​​The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. A method for installing a carbon dioxide collection device and recovery device to an injection molding machine, wherein the suction port is provided between the fixed platen and the movable platen.

28. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The injection molding machine has a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached. A method for installing a carbon dioxide collection and recovery device for an injection molding machine, wherein the aforementioned suction port is provided between the fixed platen and the movable platen.

29. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, The injection molding machine has a hopper for supplying the material to be injected, A method for installing a carbon dioxide collection device and recovery device for an injection molding machine, wherein the aforementioned suction port is provided near the hopper.

30. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, The injection molding machine has a hopper for supplying the material to be injected, A method for installing a carbon dioxide collection device and recovery device for an injection molding machine, wherein the aforementioned suction port is provided near the hopper.

31. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one discharge section is a plurality of discharge sections, the at least one collection device is a single collection device that collects carbon dioxide from all of the discharge sections, and the at least one recovery device is a single recovery device. The aforementioned collection device is A suction pipe having multiple suction ports located near each outlet and a connecting end connected to the recovery device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it to the recovery device from the connecting end, A method for installing a carbon dioxide collection device and recovery device to an injection molding machine, wherein the intake port is provided near the atmospheric communication section of the mold.

32. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one collection device is a plurality of collection devices, each collecting carbon dioxide from at least one of the outlets, the at least one recovery device is a plurality of recovery devices, and each of the plurality of recovery devices is combined with each of the plurality of collection devices. Each of the aforementioned multiple collection devices is A suction pipe having a suction port located near the outlet and a connecting end connected to the recovery device combined with the collection device, The suction pipe is provided with a pump that draws the carbon dioxide-containing gas from the suction port and supplies it from the connecting end to the recovery device combined with the collection device, A method for installing a carbon dioxide collection device and recovery device to an injection molding machine, wherein the intake port is provided near the atmospheric communication section of the mold.

33. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, A method for installing a carbon dioxide collection device and a carbon dioxide recovery device to an injection molding machine, wherein the collection device is activated when the concentration of carbon dioxide measured by the inlet-side carbon dioxide sensor exceeds a standard value, and the collection device is provided near the outlet.

34. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The method for installing a carbon dioxide collection device and a carbon dioxide collection device on an injection molding machine comprises at least one recovery device having a filter impregnated with an amine aqueous solution and a filter temperature control device for adjusting the temperature of the filter.

35. The following steps (A) At least one collection device for collecting carbon dioxide-containing gas flowing out from the cavity of the mold or from inside the injection molding machine in which the mold is attached is provided near at least one outlet from which the carbon dioxide-containing gas flows out. (B) Provide at least one recovery device for recovering carbon dioxide contained in the carbon dioxide-containing gas collected from at least one of the collection devices. It has, The at least one recovery device is, A sodium hydroxide aqueous solution supply unit, An absorption unit supplies the carbon dioxide-containing gas to the sodium hydroxide aqueous solution supplied from the supply unit, and absorbs the carbon dioxide contained in the carbon dioxide-containing gas into the sodium hydroxide aqueous solution. A method for installing a carbon dioxide collection device and recovery device to an injection molding machine, comprising the above.

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