Waste hot gas recovery device of injection molding machine

Abstract

The utility model discloses a waste hot gas recovery device of an injection molding machine, which relates to the technical field of injection molding machines and comprises a heating tank provided with a heating tank gas outlet and a heating tank gas return port. The dust collection barrel is provided with a dust collection barrel air outlet and a dust collection barrel air inlet, the heating tank air outlet is connected with the dust collection barrel air inlet through an air inlet pipe, the heating tank air return port is connected with the dust collection barrel air outlet through an air outlet pipe, and a dust collection port is formed in the lower side of the dust collection barrel; an air pump; the filter is arranged in the dust collection barrel, and the filter comprises a filter material; the dust collecting device is connected to the dust collecting opening; after waste hot air generated in the glue melting working process of the heating tank enters the dust collection barrel, dust of the waste hot air is filtered through a filter material of the filter, moisture of the waste hot air is absorbed, purification, dust removal and dehumidification work of the waste hot air is completed, air entering the heating tank carries waste heat, and energy consumption needed by heating work of the heating tank is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a waste heat recovery device for injection molding machines. Background Art

[0002] Injection molding machines are used to mold thermoplastics or thermosetting plastics into various shapes. High pressure is applied to the molten plastic to force it to eject and fill the mold cavity. During operation, the injection molding machine's heating tank generates a large amount of waste heat during the melt process, polluting the air and increasing the temperature in the workshop, degrading the working environment. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a waste heat recovery device for an injection molding machine.

[0004] According to the embodiment of the utility model, the waste heat recovery device of the injection molding machine includes: a heating tank, which is provided with a heating tank air outlet and a heating tank air return port; a dust collecting bucket, which is provided with a dust collecting bucket air outlet and a dust collecting bucket air inlet, the heating tank air outlet and the dust collecting bucket air inlet are connected by an air inlet pipe, and the heating tank air return port and the dust collecting bucket air outlet are connected by an air outlet pipe, and a dust collecting port is provided on the lower side of the dust collecting bucket; an air pump drives the air in the heating tank to enter the dust collecting bucket through the air inlet pipe, and then refluxes into the heating tank through the air outlet pipe; a filter is provided in the dust collecting bucket, and the filter includes filter material, and the air entering the dust collecting bucket through the dust collecting bucket air inlet passes through the filter material and is discharged from the dust collecting bucket air outlet; a dust collecting device is connected to the dust collecting port.

[0005] According to some embodiments of the present invention, the dust bucket includes a bucket body and a bucket cover, the dust bucket air inlet is located on the side wall of the bucket body, the dust collection port is located on the lower side of the bucket body, and the dust bucket air outlet is located on the bucket cover.

[0006] According to some embodiments of the present invention, the filter material is a cylindrical structure, the filter material has a middle through hole, and the upper end of the middle through hole of the filter material is connected to the air outlet of the dust collecting bucket.

[0007] According to some embodiments of the present invention, the filter material is formed by stacking and winding an outer filter layer, a filter paper layer, a moisture-absorbing cotton layer, and an inner filter layer. The outer filter layer is located on the outside of the filter material, and the inner filter layer is located on the inside of the filter material.

[0008] According to some embodiments of the present invention, a filter element fixing ring is provided on the upper side of the filter material, the filter element fixing ring has a middle through hole, the middle through hole of the filter element fixing ring is connected to the middle through hole of the filter material, and a filter element cover is provided on the lower side of the filter material.

[0009] According to some embodiments of the present invention, a filter element fixing portion is provided in the middle position of the filter element cover plate, the filter element fixing portion has a fixing plate mounting hole, a mounting screw is passed through the fixing plate mounting hole, a mounting nut is threadedly connected to the mounting screw, and the filter is connected to the barrel cover through the mounting screw.

[0010] According to some embodiments of the present invention, a barrel bottom conical portion is provided on the lower side of the dust collecting barrel, and the dust collecting port is located at the lower end of the barrel bottom conical portion.

[0011] According to some embodiments of the present invention, the dust collecting device includes a bellows and a dust collecting pan, the upper opening of the bellows is connected to the dust collecting port, and the lower opening of the bellows is connected to the dust collecting pan.

[0012] According to some embodiments of the present invention, throat clamps are mounted on the upper and lower ends of the bellows, and the bellows is connected to the dust collecting port and the dust collecting pan respectively through the throat clamps.

[0013] According to some embodiments of the present invention, a powder pouring port is provided on the lower side of the dust collecting tray, and a powder pouring cover is provided on the powder pouring port.

[0014] According to the waste heat recovery device of the injection molding machine according to the embodiment of the utility model, there are at least the following technical effects: after the waste heat generated by the heating tank during the melting process enters the dust collecting bucket, the filter material of the filter filters the dust in the waste heat, completing the purification, dust removal and dehumidification of the waste heat, and the air entering the heating tank carries waste heat, reducing the energy consumption required for the heating work of the heating tank.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a structural diagram of the dust collecting bucket and the dust collecting device in the utility model;

[0019] Figure 3It is a three-dimensional diagram of the dust collection bucket in the utility model;

[0020] Figure 4 This is a schematic diagram of the installation of the filter and the barrel cover in the utility model;

[0021] Figure 5 It is a schematic diagram of the winding method of the filter material in the present invention.

[0022] Reference numerals:

[0023] Heating tank 100, heating tank air outlet 110, heating tank air return port 120; dust collecting bucket 200, bucket body 210, dust collecting bucket air inlet 211, dust collecting port 212, bucket body lock buckle 213, bucket body fixing frame 214, bucket bottom conical part 215, bucket cover 220, dust collecting bucket air outlet 221, bucket cover locking plate 222; air inlet pipe 300; air outlet pipe 400; air pump 500; filter 600, filter material 610, middle through hole of filter material 611, outer filter mesh layer 612, filter paper layer 613, moisture-absorbing cotton layer 614, inner filter mesh layer 615, filter element fixing ring 620, mounting screw 630, mounting nut 640, filter element cover plate 650, filter element fixing part 651; dust collecting device 700, bellows 710, dust collecting tray 720, powder pouring cover 721, throat clamp 730. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of this utility model, "a plurality" means more than two, and "greater than," "less than," "exceed," etc. are understood to exclude the number itself. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number or order of the technical features indicated.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference below Figure 1 and Figure 2 The invention describes an injection molding machine waste heat recovery device according to an embodiment of the invention.

[0029] like Figure 1 and Figure 2 As shown, the waste heat recovery device for an injection molding machine according to an embodiment of the present invention includes a heating tank 100 , a dust collecting barrel 200 , an air pump 500 , a filter 600 and a dust collecting device 700 .

[0030] The heating tank 100 is provided with a heating tank air outlet 110 and a heating tank air return port 120; the dust collecting bucket 200 is provided with a dust collecting bucket air outlet 221 and a dust collecting bucket air inlet 211. The heating tank air outlet 110 and the dust collecting bucket air inlet 211 are connected by an air inlet pipe 300, and the heating tank air return port 120 and the dust collecting bucket air outlet 221 are connected by an air outlet pipe 400. The dust collecting bucket 200 is provided with a dust collecting port 212 on the lower side; the air pump 500 drives the dust collecting bucket 200. The air in the heating tank 100 enters the dust collecting bin 200 through the air inlet pipe 300, and then flows back into the heating tank 100 through the air outlet pipe 400; the filter 600 is arranged in the dust collecting bin 200, and the filter 600 includes a filter material 610. The air entering the dust collecting bin 200 through the dust collecting bin air inlet 211 passes through the filter material 610 and is discharged from the dust collecting bin 200 from the dust collecting bin air outlet 221; the dust collecting device 700 is connected to the dust collecting port 212.

[0031] For example, Figure 1 As shown, the heating tank 100 is used to heat the glue particles therein during the melt process. The heating tank 100 is provided with a heating tank air outlet 110 and a heating tank air return port 120, allowing the air inside the heating tank 100 to circulate with the outside world through the heating tank air outlet 110 and the heating tank air return port 120. Similarly, the dust collection bucket 200 is provided with a dust collection bucket air outlet 221 and a dust collection bucket air inlet 211, also allowing the air inside the dust collection bucket 200 to circulate with the outside world through the dust collection bucket air outlet 221 and the dust collection bucket air inlet 211. The air outlet 110 of the heating tank is connected to the air inlet 211 of the dust collecting bucket through the air inlet pipe 300, and the air return port 120 of the heating tank is connected to the air outlet 221 of the dust collecting bucket through the air outlet pipe 400. The air pump 500 drives the air in the heating tank 100 to enter the dust collecting bucket 200 through the air inlet pipe 300, and then flows back into the heating tank 100 through the air outlet pipe 400. In this way, the air flow can be guided by the air pump 500 to realize air circulation along the path of heating tank 100-air inlet pipe 300-dust collecting bucket 200-air outlet pipe 400-heating tank 100.

[0032] Filter 600 is disposed within dust collection barrel 200 and includes filter material 610. This allows the filter material 610 of filter 600 to purify, remove dust, and dehumidify the aforementioned airflow. A dust collection port 212 is provided on the underside of dust collection barrel 200, and a dust collection device 700 is connected to the dust collection port 212. This allows dust falling from filter 600 to be collected by dust collection device 700. Because filter material 610 absorbs moisture from the waste heat while also partially absorbing the heat from the moisture, the treated waste gas, even when discharged, is purified and has a lower temperature.

[0033] During actual operation, the waste heat generated by the heating tank 100 during the glue melting process contains moisture and dust. Driven by the air pump 500, the waste heat enters the dust collecting bucket 200 along the path of heating tank 100 - air inlet pipe 300 - dust collecting bucket 200. The filter material 610 of the filter 600 filters the dust in the waste heat and absorbs the moisture in the waste heat through the filter material 610. This completes the purification, dust removal and dehumidification of the waste heat. After treatment, the waste heat becomes purified air, reducing air pollution and workshop temperature. The purified air then flows back into the heating tank 100 along the path of dust collecting bucket 200 - air outlet pipe 400 - heating tank 100. The air entering the heating tank 100 carries residual heat. The heating tank 100 continues to heat the raw materials for glue melting without the need to draw in external air, thereby reducing the energy consumption required for the heating work of the heating tank 100.

[0034] It is conceivable that the specific structure and working mode of the heating tank 100 are determined according to the matching injection molding machine equipment.

[0035] In some embodiments of the present invention, referring to Figure 3 The dust bucket 200 includes a barrel body 210 and a barrel cover 220. The dust bucket air inlet 211 is located on the side wall of the barrel body 210, the dust collection port 212 is located on the lower side of the barrel body 210, and the dust bucket air outlet 221 is located on the barrel cover 220. The barrel cover 220 covers the opening of the barrel body 210. The dust bucket air inlet 211 is set on the side wall of the barrel body 210, the dust collection port 212 is set on the lower side of the barrel body 210, and the dust bucket air outlet 221 is set on the barrel cover 220. This design makes the dust bucket 200 more compact and also facilitates the replacement of the filter 600 in the dust bucket 200.

[0036] In some specific embodiments of the present invention, a barrel body lock buckle 213 is provided on the barrel body 210, and a barrel cover lock plate 222 is provided on the barrel cover 220. When the barrel cover 220 is closed on the opening of the barrel body 210, the barrel body lock buckle 213 can buckle the barrel cover lock plate 222 to fix the barrel cover 220.

[0037] In some specific embodiments of the present invention, a barrel body fixing frame 214 is provided on the barrel body 210. The dust collecting barrel 200 is fixedly mounted on a wall or equipment through the barrel body fixing frame 214.

[0038] In some embodiments of the present invention, referring to Figure 4 、 Figure 5 The filter material 610 is a cylindrical structure having a central through hole 611. The upper end of the central through hole 611 is connected to the dust bin air outlet 221. Exhaust heat entering the dust bin body 210 through the dust bin air inlet 211 enters the central through hole 611 of the filter material 610 from the outside of the filter material 610 for purification. The purified air then flows through the central through hole 611 and is discharged through the dust bin air outlet 221, resulting in higher purification efficiency.

[0039] In some embodiments of the present invention, referring to Figure 5 Filter material 610 is formed by stacking and winding an outer filter layer 612, a filter paper layer 613, a moisture-absorbing cotton layer 614, and an inner filter layer 615. The outer filter layer 612 is located on the outside of the filter material 610, while the inner filter layer 615 is located on the inside. In addition to filtering dust, the outer filter layer 612 also works with the inner filter layer 615 to support the filter material 610, ensuring sufficient structural strength. The filter paper layer 613 provides a more efficient dust filter, while the moisture-absorbing cotton layer 614 can more fully absorb moisture from the exhaust gas.

[0040] In some embodiments of the present invention, referring to Figure 2 、 Figure 4 A filter element retaining ring 620 is provided on the upper side of the filter material 610. The filter element retaining ring 620 has a central through hole, which is connected to the central through hole 611 of the filter material. A filter element cover plate 650 is provided on the lower side of the filter material 610. The filter element retaining ring 620 and the filter element cover plate 650 on the upper and lower sides of the filter material 610 serve as a fixed support structure for the filter 600. The filter element retaining ring 620 has a central through hole, which corresponds to the central through hole 611 of the filter material 610, ensuring that the air in the central through hole can be discharged through the dust collection bin outlet 221.

[0041] In some specific embodiments of the present invention, the filter element fixing ring 620 and the filter element cover plate 650 are made of plastic.

[0042] In some specific embodiments of the present invention, refer to Figure 2 、 Figure 3The dust collection bin 200 is provided with a tapered bottom portion 215 on its underside, with the dust collection port 212 located at its lower end. The inverted conical design of the tapered bottom portion 215 means that, in a horizontal cross-section projected from top to bottom, the cross-sectional area of ​​the upper portion of the tapered bottom portion 215 is larger than the cross-sectional area of ​​the lower portion of the tapered bottom portion 215, resulting in a larger-at-top-and-smaller-at-the-bottom structure. This structure not only facilitates the collection of dust filtered by the filter 600 into the dust collection port 212 and into the dust collection device 700, but also allows the bottom end of the filter 600 placed in the dust collection bin 200 to engage the inner wall of the tapered bottom portion 215, utilizing the elasticity of the material of the tapered bottom portion 215 to create a squeezing force that secures the filter 600. This eliminates the need for additional structural elements to secure the filter 600, making installation more convenient.

[0043] In some embodiments of the present invention, referring to Figure 4 A filter element fixing portion 651 is provided in the middle position of the filter element cover plate 650. The filter element fixing portion 651 has a fixing plate mounting hole. A mounting screw 630 is passed through the fixing plate mounting hole. A mounting nut 640 is threadedly connected to the mounting screw 630. The filter 600 is connected to the barrel cover 220 through the mounting screw 630.

[0044] In a further embodiment of the present invention, a mounting bracket is provided in the dust bucket air outlet 221 or on the lower side of the dust bucket air outlet 221, and the mounting bracket has a mounting bracket vent hole and a mounting bracket middle hole. The mounting screw 630 penetrates the mounting bracket middle hole of the mounting bracket and the fixing plate mounting hole of the filter element fixing portion 651 to achieve the connection and installation of the filter 600 and the bucket cover 220. In this way, the filter 600 can be taken out for replacement by simply opening the bucket cover 220. The mounting bracket vent hole ensures that the gas filtered by the filter 600 can pass through the middle through hole 611 of the filter material and then be discharged from the dust bucket air outlet 221.

[0045] Furthermore, the mounting bracket is a cross-shaped structure.

[0046] In a further embodiment of the present invention, the filter element fixing portion 651 on the filter element cover plate 650 is in a stepped shape formed by a depression or a protrusion, which can improve the structural strength of the position of the filter element fixing portion 651.

[0047] In some specific embodiments of the present invention, the mounting screw 630 has a screw head and a threaded portion. After the mounting screw 630 passes through the middle hole of the mounting bracket and the fixing plate mounting hole of the filter element fixing portion 651, the screw head of the mounting screw 630 is clamped on the upper side of the mounting bracket, and the mounting nut 640 is mounted on the threaded portion and clamped on the lower side of the filter element fixing portion 651 to ensure that the filter 600 is firmly installed.

[0048] In some specific embodiments of the present invention, the mounting screw 630 has a screw head and a threaded portion. After the mounting screw 630 passes through the middle hole of the mounting bracket and the fixing plate mounting hole of the filter element fixing portion 651, the screw head of the mounting screw 630 is clamped on the lower side of the filter element fixing portion 651, and the mounting nut 640 is put on the threaded portion and clamped on the upper side of the mounting bracket to ensure that the filter 600 is firmly installed.

[0049] In some embodiments of the present invention, a heat insulating layer is provided on the inner wall of the dust collecting bucket 200 to reduce the heat in the dust collecting bucket 200 from being dissipated outward.

[0050] In some embodiments of the present invention, referring to Figure 1 、 Figure 2 The dust collecting device 700 includes a bellows 710 and a dust collecting pan 720. The upper opening of the bellows 710 is connected to the dust collecting port 212, and the lower opening of the bellows 710 is connected to the dust collecting pan 720. The dust falling into the dust collecting device 700 passes through the bellows 710 and is collected in the dust collecting pan 720. The bellows 710 can be extended and retracted up and down, so that as the dust in the dust collecting pan 720 increases, the bellows 710 can extend downward under the action of gravity to accommodate more dust, and the amount of dust in the dust collecting device 700 can be intuitively seen. In addition, the bellows 710 itself can adjust the telescopic length and bending angle, so that it is convenient to align the bellows 710 with a container such as a garbage bag or a garbage can, and then open the dust collecting pan 720 to discharge the dust into the container.

[0051] In some embodiments of the present invention, the bellows 710 is provided with throat hoops 730 at its upper and lower ends. The bellows 710 is connected to the dust collecting port 212 and the dust collecting pan 720 respectively via the throat hoops 730, thereby facilitating assembly and disassembly of the bellows 710 and the dust collecting pan 720. The bellows 710 is connected to the dust collecting port 212 by aligning its upper end with the dust collecting port 212 and fitting it onto the dust collecting port 212. The throat hoops 730 are then used to tighten the upper end of the bellows 710, thereby completing the connection between the bellows 710 and the dust collecting port 212. Similarly, the dust collecting pan 720 is aligned with its lower end, and the dust collecting pan 720 is inserted into the bellows 710. The throat hoops 730 are then used to tighten the lower end of the bellows 710, thereby completing the connection between the bellows 710 and the dust collecting pan 720.

[0052] In a further embodiment of the present invention, a powder pouring port is provided on the lower side of the dust collecting tray 720, and a powder pouring cover 721 is provided on the powder pouring port. In this way, the dust in the dust collecting tray 720 can be discharged from the powder pouring port by simply opening the powder pouring cover 721 without having to remove the dust collecting tray 720 entirely.

[0053] In some specific embodiments of the present invention, the powder pouring port and the powder pouring cover 721 are connected via a threaded connection or a snap-fit ​​structure.

[0054] Other structures and operations of the injection molding machine and the waste heat recovery device for the injection molding machine according to the embodiments of the present invention are well known to those skilled in the art and will not be described in detail here.

[0055] Reference below Figure 1 and Figure 2 The waste heat recovery device for an injection molding machine according to the present invention is described in detail with reference to a specific embodiment. It is worth noting that the following description is merely an illustrative example and does not specifically limit the present invention.

[0056] like Figure 1 and Figure 2 As shown, the waste heat recovery device of the injection molding machine according to the embodiment of the present invention includes a heating tank 100, a dust collecting bucket 200, an air inlet pipe 300, an air outlet pipe 400, an air pump 500, a filter 600, and a dust collecting device 700.

[0057] The heating tank 100 is provided with a heating tank air outlet 110 and a heating tank air return port 120 .

[0058] The dust collecting bucket 200 includes a bucket body 210 and a bucket cover 220. The bucket body 210 is provided with a dust collecting bucket air inlet 211 and a dust collecting port 212. The bucket cover 220 is provided with a dust collecting bucket air outlet 221.

[0059] The heating tank air outlet 110 is connected to the dust collection bucket air inlet 211 via an air inlet pipe 300, and the heating tank air return port 120 is connected to the dust collection bucket air outlet 221 via an air outlet pipe 400. The air pump 500 is connected to the air outlet pipe 400.

[0060] The filter 600 includes a filter medium 610 , a filter element fixing ring 620 , a mounting screw 630 , and a mounting nut 640 .

[0061] The filter material 610 is provided with a filter middle through hole 611. The filter material 610 includes an outer filter layer 612, a filter paper layer 613, a moisture-absorbing cotton layer 614, and an inner filter layer 615.

[0062] The dust collecting device 700 includes a bellows 710 and a dust collecting tray 720. The dust collecting tray 720 is provided with a powder pouring cover 721. The bellows 710 is provided with a hose clamp 730, and the bellows 710 is connected to the dust collecting port 212 and the dust collecting tray 720 through the hose clamp 730.

[0063] The following experiment is conducted by comparing an injection molding machine without the injection molding machine waste heat recovery device according to the above embodiment with an injection molding machine installed with the injection molding machine waste heat recovery device according to the above embodiment. The two groups of injection molding machines are recorded separately, where the first group of injection molding machines is before installation and the second group of injection molding machines is after installation. The experiment is conducted with five heating intervals and five interruptions.

[0064] The preset heating temperature of the two injection molding machine heating tanks 100 is 85°C, the power supply voltage is 220V, the heating current is 12.9A, the heating tanks 100 use a heating tube with a pure resistance circuit, and the heating tube power is 3KW.

[0065] The temperature of the waste heat emitted by the injection molding machine before installation is 75.7℃.

[0066]

[0067]

[0068]

[0069]

[0070] Based on the above experimental data, the following conclusions can be drawn:

[0071] 1. From Table 1, we can see that before installation, the average startup time is 34.84 seconds. From Table 2, we can see that before installation, the average interruption time is 34.84 seconds. According to the heating cycle per hour before installation = heating time S + stop heating time S = 34.84 seconds + 22.69 seconds = 57.53 seconds, 62.57 times / hour; cumulative heating time = times × single heating time = 2179.93 seconds, hourly running time = cumulative heating time / 3600 seconds = 0.6055 hours, so hourly energy consumption = power × hourly running time = 1.8165KWH;

[0072] 2. From Table 3, we can see that after installation, the average startup time is 19.65 seconds each time. From Table 4, we can see that after installation, the average interruption time can last 61.61 seconds. According to the heating cycle per hour after installation = heating time S + stop heating time S = 19.65 seconds + 61.61 seconds = 81.26 seconds, 44.3 times / hour; cumulative heating time = number of times × single heating time = 870.49 seconds, hourly running time = cumulative heating time / 3600 seconds = 0.2418 hours, hourly energy consumption = power × running time = 0.725KWH. Therefore, after installation, under the premise of maintaining the same working needs, the heating time can be reduced and the interruption time can be extended to achieve energy saving;

[0073] 3. After installation, the energy consumption saved per hour for each machine = energy consumption before installation (KWH) - energy consumption after installation (KWH) = 1.817KWH - 0.725KWH = 1.0915KWH. If the machine is turned on for 12 hours a day, 13.098KWH can be saved per day. If there are 300 days a year, each injection molding machine can save 3929.4KWH of electricity per year.

[0074] According to the waste heat recovery device of the injection molding machine of the embodiment of the present invention, by such a setting, at least the following effects can be achieved. After the waste heat gas generated by the heating tank 100 during the melting process enters the dust collecting bucket 200, the filter material 610 of the filter 600 filters the dust of the waste heat gas and absorbs the moisture of the waste heat gas, thereby completing the purification, dust removal and dehumidification of the waste heat gas; effectively reducing the indoor temperature, improving the efficiency of the existing water-cooled air-conditioning in the workshop, and facilitating the workshop to agree to install central air-conditioning; avoiding the PVC plastic odor generated by the heating tank 100 and being discharged disorderly in the workshop space, which is more conducive to protecting the health of employees; complying with national environmental protection policies and energy conservation and emission reduction requirements; after the waste heat gas is treated and purified, it is discharged according to the heating tank 100 - air inlet pipe 300 - dust collecting bucket 200 - air outlet pipe 4 00——The path of the heating tank 100 realizes continuous air circulation processing, and the air entering the heating tank 100 carries waste heat. The heating tank 100 can use the waste heat to continue to heat the raw materials to melt the glue, thereby reducing the energy consumption required for the heating work of the heating tank 100; the filtered dust passes through the bellows 710 and is collected in the dust collecting tray 720. The bellows 710 can be extended and retracted up and down, so that as the dust in the dust collecting tray 720 increases, the bellows 710 can extend downward under the action of gravity to accommodate more dust, and the amount of dust in the dust collecting device 700 can be intuitively seen; the bellows 710 itself can adjust the extension length and bending angle, so that it is convenient to align the bellows 710 with containers such as garbage bags or garbage cans, and then open the dust collecting tray 720 to discharge the dust into the container.

[0075] Throughout this specification, references to the terms "some embodiments" or "it is contemplated that" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0076] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An injection molding machine waste heat recovery device, characterized in that: include: The heating tank (100) is provided with a heating tank air outlet (110) and a heating tank air return port (120); A dust collecting bucket (200) is provided with a dust collecting bucket air outlet (221) and a dust collecting bucket air inlet (211); the heating tank air outlet (110) and the dust collecting bucket air inlet (211) are connected via an air inlet pipe (300); the heating tank air return port (120) and the dust collecting bucket air outlet (221) are connected via an air outlet pipe (400); a dust collecting port (212) is provided on the lower side of the dust collecting bucket (200); the dust collecting bucket (200) comprises a bucket body (210) and a bucket cover (220); the dust collecting bucket air inlet (211) is located on the side wall of the bucket body (210); the dust collecting port (212) is located on the lower side of the bucket body (210); and the dust collecting bucket air outlet (221) is located on the bucket cover (220); An air pump (500) drives the air in the heating tank (100) to enter the dust collecting bucket (200) through the air inlet pipe (300), and then flows back through the air outlet pipe (400) to enter the heating tank (100); A filter (600) is arranged in the dust collecting bucket (200), the filter (600) comprising a filter material (610), the air entering the dust collecting bucket (200) through the dust collecting bucket air inlet (211) passes through the filter material (610) and is discharged from the dust collecting bucket air outlet (221), the filter material (610) being a cylindrical structure, the filter material (610) having a filter material middle through hole (611), the upper end of the filter material middle through hole (611) being in communication with the dust collecting bucket air outlet (221); The dust collecting device (700) is connected to the dust collecting port (212).

2. The waste heat recovery device for an injection molding machine according to claim 1, characterized in that: The filter material (610) is formed by stacking and winding an outer filter layer (612), a filter paper layer (613), a moisture-absorbing cotton layer (614), and an inner filter layer (615). The outer filter layer (612) is located outside the filter material (610), and the inner filter layer (615) is located inside the filter material (610).

3. The waste heat recovery device for an injection molding machine according to claim 1, characterized in that: A filter element fixing ring (620) is provided on the upper side of the filter material (610), the filter element fixing ring (620) having a middle through hole, the middle through hole of the filter element fixing ring (620) being in communication with the middle through hole (611) of the filter material, and a filter element cover plate (650) is provided on the lower side of the filter material (610).

4. The waste heat recovery device for an injection molding machine according to claim 3, characterized in that: A filter element fixing portion (651) is provided in the middle of the filter element cover plate (650), the filter element fixing portion (651) having a fixing plate mounting hole, a mounting screw (630) passing through the fixing plate mounting hole, a mounting nut (640) being threadedly connected to the mounting screw (630), and the filter (600) is connected to the barrel cover (220) via the mounting screw (630).

5. The waste heat recovery device for an injection molding machine according to claim 1, characterized in that: A barrel bottom conical portion (215) is provided on the lower side of the dust collecting barrel (200), and the dust collecting port (212) is located at the lower end of the barrel bottom conical portion (215).

6. The waste heat recovery device for an injection molding machine according to claim 1, characterized in that: The dust collecting device (700) comprises a bellows (710) and a dust collecting pan (720), wherein the upper opening of the bellows (710) is connected to the dust collecting port (212), and the lower opening of the bellows (710) is connected to the dust collecting pan (720).

7. The waste heat recovery device for an injection molding machine according to claim 6, characterized in that: The upper and lower ends of the bellows (710) are sleeved with throat hoops (730), and the bellows (710) is connected to the dust collecting port (212) and the dust collecting pan (720) respectively via the throat hoops (730).

8. The waste heat recovery device for an injection molding machine according to claim 7, characterized in that: A powder pouring port is provided on the lower side of the dust collecting tray (720), and a powder pouring cover (721) is provided on the powder pouring port.

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