Filtering structure and injection molding machine having the same

Abstract

The utility model discloses a filter structure and have its injection molding machine relates to injection molding machine technical field, include: the cylinder, the cylinder is provided with the waste heat collection sleeve outside, the hopper is connected with the air inlet pipe and the air outlet pipe between waste heat collection sleeve with the hopper, the first filter includes the first filter core of upside and the dust bag of downside, the second filter, the second filter is located between the first filter with the waste heat collection sleeve, the second filter includes the second filter core, the airflow with dust can be filtered and purified by the first filter and the second filter in turn after entering the air inlet pipe, wherein the first filter is responsible for the airflow that enters the air inlet pipe and carries out the primary filtration work, the second filter is responsible for the airflow that enters the air inlet pipe and carries out the fine filtration work, is enough to guarantee that the airflow that enters the waste heat collection sleeve even refluxes into the hopper is purified enough.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a filter structure and an injection molding machine having the same. Background Technology

[0002] Existing plastic products are typically manufactured using injection molding machines. Before injection molding, the plastic needs to be dehumidified and dried in a dryer, thus requiring a heat source. The injection molding machine's molten plastic barrel also requires a heater to heat the plastic to be molded. Since both processes require heating, some injection molding machines incorporate waste heat recovery devices to collect the residual heat from the higher-temperature molten plastic barrel and supply it to the relatively lower-temperature dryer, thereby achieving energy savings.

[0003] However, in practice, it has been found that when this waste heat recycling device is used for a long time, the plastic dust that was previously in the dryer will accumulate during the circulation process. This will not only contaminate the added plastic, but also easily cause the waste heat recycling device to become clogged and fail. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a filter structure and an injection molding machine having the same.

[0005] A filter structure according to a first aspect of the present invention includes: a material cylinder, with a waste heat collection sleeve disposed outside the material cylinder; a hopper, with an air inlet pipe and an air outlet pipe connected between the waste heat collection sleeve and the hopper; a first filter connected to the air inlet pipe, the first filter including an upper first filter element and a lower dust collection bag; and a second filter connected to the air inlet pipe, the second filter being located between the first filter and the waste heat collection sleeve, the second filter including a second filter element.

[0006] According to some embodiments of the present invention, the first filter includes a first filter housing, a first filter air inlet on the side wall of the first filter housing, a first filter dust outlet on the lower side of the first filter housing, and a dust collection bag connected to the first filter dust outlet; a first filter end cap is provided on the upper side of the first filter housing, a first filter air outlet is provided on the upper side of the first filter end cap, the first filter element is located inside the first filter housing, the upper side of the first filter element is connected to the lower side of the first filter end cap, the first filter element has an inner cavity, and the inner cavity of the first filter element communicates with the first filter air outlet.

[0007] According to some embodiments of the present invention, the first filter element has an inner cavity, and the first filter element sidewall of the first filter element adopts a metal filter mesh structure.

[0008] According to some embodiments of the present invention, a dust collection inlet is provided on the upper side of the dust collection bag, the dust collection inlet is located below the first filter element, and a dust collection outlet is provided on the lower side of the dust collection bag; the side wall of the dust collection bag has a fixing part, the fixing part can block the dust collection outlet.

[0009] According to some embodiments of the present invention, the side wall of the dust collection bag has a folding part and a fixing part. The dust collection bag can be folded along the folding part to form a folded state. When the dust collection bag is in the folded state, it can block the dust collection outlet. The dust collection bag is fixed and maintained in the folded state by the fixing part.

[0010] According to some embodiments of the present invention, the second filter includes a second filter housing, a second filter inlet on the side wall of the second filter housing, a second filter outlet on the upper side of the second filter housing, a second filter element located inside the second filter housing, the second filter element having an inner cavity that communicates with the second filter outlet; a vertical fixing screw is provided inside the second filter housing, the second filter element is fitted onto the vertical fixing screw, a second filter end cap is provided on the lower side of the second filter housing, the upper end of the vertical fixing screw is connected to the upper side wall of the second filter housing, the lower end of the vertical fixing screw extends downward through the second filter element, a fixing nut is fitted onto the lower part of the vertical fixing screw, and the upper side of the fixing nut abuts against the bottom wall of the second filter element.

[0011] According to some embodiments of the present invention, the second filter element has an inner cavity, and the second filter element sidewall of the second filter element adopts a filter paper or filter cotton structure.

[0012] The filter structure according to the embodiment of this utility model has at least the following technical effects: 1. The waste heat generated during the heating process of the barrel is collected by the waste heat collection sleeve. The airflow with waste heat enters the hopper through the air outlet pipe to supplement the heating and drying work of the hopper. This not only reduces the outward dissipation of waste heat and improves the working environment, but also reduces the energy consumption when heating the hopper, thus achieving the effect of energy saving and emission reduction. 2. After the airflow carrying dust enters the air inlet pipe, it can be filtered and purified by the first filter and the second filter in sequence. The first filter is responsible for the initial filtration of the airflow entering the air inlet pipe, and the second filter is responsible for the fine filtration of the airflow entering the air inlet pipe. This is sufficient to ensure that the airflow entering the waste heat collection jacket and even returning to the hopper is sufficiently purified, which avoids blockage of the single loop of waste heat recovery and also avoids dust accumulation and contamination of plastic raw materials. 3. The dust collection bag can be folded up along the fold section to block the dust collection outlet and prevent dust from leaking out. When the dust collection bag is no longer folded, the dust collection outlet opens to discharge the dust. This way, it is not necessary to remove the dust collection bag to easily clean the dust inside.

[0013] An injection molding machine according to a second aspect of the present invention includes a filter structure according to the first aspect of the present invention described above. The upper side of the rear of the waste heat collection sleeve has a waste heat collection sleeve air inlet and a waste heat collection sleeve air outlet. The lower part of the side wall of the hopper has a hopper air inlet, and the upper side of the hopper has a hopper air outlet. The air outlet pipe is connected to the waste heat collection sleeve air outlet and the hopper air inlet. A fan and an electric heater are connected to the air outlet pipe. The air inlet pipe is connected to the waste heat collection sleeve air inlet and the hopper air outlet.

[0014] According to some embodiments of the present invention, the waste heat collection sleeve has a material cylinder receiving cavity, the material cylinder is located in the material cylinder receiving cavity, the waste heat collection sleeve includes a sleeve shell and a heat pipe, the heat pipe is located in the sleeve shell, and the two ends of the heat pipe are respectively connected to the air inlet and the air outlet of the waste heat collection sleeve; the heat pipe is bent to form a plurality of bending loops, the bending loops include straight loop portions and turning loop portions, and each of the straight loop portions is arranged to surround and form the material cylinder receiving cavity.

[0015] According to some embodiments of the present invention, an elastic buckle is provided on the lower part of the side wall of the sleeve housing, a collection sleeve bottom cover is provided on the lower side of the sleeve housing, a buckle plate is provided on the outer edge of the collection sleeve bottom cover plate, and the elastic buckle can lock the buckle plate.

[0016] The injection molding machine according to the embodiments of the present invention has at least the following beneficial effects: 1. After the airflow carrying dust enters the air inlet pipe, it can be filtered and purified by the first filter and the second filter in sequence. The first filter is responsible for the initial filtration of the airflow entering the air inlet pipe, and the second filter is responsible for the fine filtration of the airflow entering the air inlet pipe. This is sufficient to ensure that the airflow entering the waste heat collection jacket and even returning to the hopper is sufficiently purified, which avoids blockage of the single loop of waste heat recovery and also avoids dust accumulation and contamination of plastic raw materials. 2. The heat pipe has several bends through bending, which increases the heat exchange area between the heat pipe and the barrel and improves the heat absorption efficiency of the waste heat collection jacket. 3. The outer shell and the bottom cover of the collection sleeve can be flexibly disassembled and assembled, making it convenient for the waste heat collection sleeve to be installed in the material cylinder.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of the injection molding machine according to this utility model; Figure 2 This is a schematic diagram of the structure of the first filter of this utility model; Figure 3 This is a schematic diagram of the structure of the second filter of this utility model; Figure 4 This is a perspective view of the first filter element of this utility model; Figure 5 This is a schematic diagram of the working process of the dust collection bag of this utility model; Figure 6 This is a perspective view of the waste heat collection sleeve of this utility model; Figure label: Cylinder 100; Waste heat collection sleeve 200, sleeve shell 210, elastic buckle 211, heat insulation layer 212, heat conducting layer 213, heat pipe 220, waste heat collection sleeve air inlet 221, waste heat collection sleeve air outlet 222, bending circuit 223, circuit straight section 224, circuit turning section 225, cylinder receiving cavity 230, collection sleeve bottom cover plate 240, buckle plate 241; hopper 300, hopper air inlet 310, hopper air outlet 320; first filter 400, first filter shell 410, first filter air inlet 411, first filter dust outlet 412, first filter end cap 413, first filter air outlet 414, end cap buckle 415, first filter element 420, first filter filter housing 410, first filter housing ... housing 412, first filter housing 413, first filter housing 414, first filter housing 415, first filter element 416, first filter housing 410, first filter housing 411, first filter housing 412, first filter housing 413, first filter housing 414, first filter housing 415, first filter element 416, first filter housing 416, first filter housing 416, first filter housing 417, first filter housing 418, first filter housing 419, first filter housing 410, first filter housing 410, first filter housing 411, first filter housing 412, first filter housing 413, first filter housing 414, first filter housing 415, first filter housing 416, first filter housing 416, first filter Filter element sidewall 421, first filter element bottom cover 422, dust collection bag 430, dust collection inlet 431, dust collection outlet 432, folding part 433, fixing part 434; second filter 500, second filter housing 510, second filter air inlet 511, second filter air outlet 512, second filter end cover 513, second filter end cover through hole 514, screw connecting bracket 515, end cover nut 516, second filter element 520, second filter element sidewall 521, second filter element bottom cover 522, second filter element sealing strip 523, vertical fixing screw 530, fixing nut 531, screw fixing head 532; air inlet pipe 610, air outlet pipe 620, fan 621, electric heater 622. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] The following is for reference. Figure 1 A filter structure according to an embodiment of the present invention is described.

[0024] like Figure 1 As shown, the filter structure according to an embodiment of the present invention includes a material cylinder 100, a hopper 300, a first filter 400, and a second filter 500.

[0025] A waste heat collection sleeve 200 is installed outside the material cylinder 100; an air inlet pipe 610 and an air outlet pipe 620 are connected between the waste heat collection sleeve 200 and the material hopper 300; see reference. Figure 2 The first filter 400 is connected to the air inlet duct 610, and the first filter 400 includes an upper first filter element 420 and a lower dust collection bag 430; see reference. Figure 3 The second filter 500 is also connected to the air inlet pipe 610. The second filter 500 is located between the first filter 400 and the waste heat collection sleeve 200. The second filter 500 includes a second filter element 520.

[0026] For example, such as Figure 1As shown, the hopper 300 is responsible for heating and drying the plastic, while the cylinder 100 is responsible for heating and melting the plastic. A waste heat collection sleeve 200 is installed outside the cylinder 100 to collect the waste heat generated during heating. The waste heat collection sleeve 200 is relatively fixed to the cylinder 100. An inlet pipe 610 and an outlet pipe 620 connect the waste heat collection sleeve 200 and the hopper 300, forming a highly efficient single-loop waste heat recovery circulation structure. The airflow can circulate along the path of waste heat collection sleeve 200 – outlet pipe 620 – hopper 300 – inlet pipe 610 – waste heat collection sleeve 200. (Refer to...) Figure 2 The first filter 400 is connected to the air inlet duct 610 and is responsible for the initial filtration of the airflow entering the air inlet duct 610. The first filter 400 includes an upper first filter element 420 and a lower dust collection bag 430. (Refer to...) Figure 3 The second filter 500 is also connected to the air inlet pipe 610. The second filter 500 is located between the first filter 400 and the waste heat collection sleeve 200. It is responsible for fine filtration of the airflow entering the air inlet pipe 610. The second filter 500 includes a second filter element 520.

[0027] In actual operation, the hopper 300 starts heating to dry the plastic, while the cylinder 100 also starts heating to melt the plastic. The melting temperature is higher than the drying temperature. The waste heat generated by the cylinder 100 during heating is collected by the waste heat collection sleeve 200, and the airflow carrying the waste heat enters the hopper 300 through the air outlet 620 to supplement the heating and drying process of the hopper 300. This not only reduces the outward dissipation of waste heat and improves the working environment, but also reduces the energy consumption of the hopper 300 during heating, achieving the effect of energy saving and emission reduction.

[0028] Because plastic raw materials often carry a large amount of dust, the hopper 300 will generate a significant amount of dust during the heating and drying process. The dust-laden airflow entering the inlet duct 610 is then filtered and purified sequentially by the first filter 400 and the second filter 500. The first filter 400 performs preliminary filtration of the airflow entering the inlet duct 610, filtering large dust particles onto the first filter element 420, which then falls and is collected in the dust collection bag 430. The second filter 500 performs fine filtration of the airflow entering the inlet duct 610, with the second filter element 520 filtering and isolating fine dust particles. This ensures sufficient purification of the airflow entering the waste heat collection jacket 200 and even returning to the hopper 300, preventing blockage of the single-loop waste heat recovery system and avoiding dust accumulation that could contaminate the plastic raw materials.

[0029] In some embodiments of this utility model, reference is made to Figure 2The first filter 400 includes a first filter housing 410, a first filter air inlet 411 on the side wall of the first filter housing 410, a first filter dust outlet 412 on the lower side of the first filter housing 410, and a dust collection bag 430 connected to the first filter dust outlet 412; see reference. Figure 4 The first filter housing 410 has a first filter end cap 413 on its upper side, and the first filter end cap 413 has a first filter outlet 414 on its upper side. The first filter element 420 is located inside the first filter housing 410. The upper side of the first filter element 420 is connected to the lower side of the first filter end cap 413. The first filter element 420 has an inner cavity, and the inner cavity of the first filter element 420 is connected to the first filter outlet 414.

[0030] The first filter 400 is protected by a first filter housing 410, and the first filter inlet 411 of the first filter housing 410 is used to guide external air into the interior of the first filter 400.

[0031] For details, please refer to Figure 4 As shown, a carefully designed first filter end cap 413 is installed on the upper part of the first filter housing 410. This end cap not only serves a sealing function but also has a first filter outlet 414 on its upper side, ensuring that the filtered clean air can be smoothly discharged. Located inside the first filter housing 410 is a key filter component—the first filter element 420—responsible for the initial filtration of the airflow. The upper part of this filter element is tightly connected to the lower part of the first filter end cap 413, ensuring the sealing and high efficiency of the filtration process. The inner cavity of the first filter element 420 is directly connected to the first filter outlet 414 via an airtight connection, thus ensuring that the air purified by the first filter element 420 can be smoothly discharged through the outlet, achieving an ideal filtration effect for large particulate dust.

[0032] A first filter dust inlet 412 is provided on the lower side of the first filter housing 410. The main function of the dust inlet is to facilitate the smooth discharge of filtered dust particles and their collection by the dust collection bag 430.

[0033] In a further embodiment of the present invention, when the material cylinder 100 and the hopper 300 are started, the first filter 400 will vibrate. This vibration helps to shake off the dust attached to the first filter element 420 and collect it into the dust collection bag 430.

[0034] In a further embodiment of the present invention, the first filter end cap 413 is connected to the outer wall of the first filter housing 410 via an end cap snap 415.

[0035] In some embodiments of this utility model, reference is made to Figure 2, Figure 4 The first filter element 420 has an inner cavity, and the first filter element sidewall 421 of the first filter element 420 adopts a metal filter mesh structure. The metal filter mesh structure is sufficient to isolate large dust particles and is more robust and durable.

[0036] In some specific embodiments of this utility model, a first filter element bottom cover 422 is provided on the lower side of the first filter element 420.

[0037] In some embodiments of this utility model, reference is made to Figure 2 , Figure 5 The dust collection bag 430 has a dust collection inlet 431 on its upper side, located below the first filter element 420, and a dust collection outlet 432 on its lower side. The side wall of the dust collection bag 430 has a fixing part 434 that can block the dust collection outlet 432. The dust collection bag 430 uses the dust collection inlet 431 on its upper side to collect dust particles collected by the first filter element 420 and then falling down. The dust collection outlet 432 is located on the lower part of the dust collection bag 430 to allow dust to accumulate and be discharged smoothly. The fixing part 434 blocks the dust collection outlet 432 to prevent dust leakage. When the dust collection outlet 432 is opened, the dust inside the dust collection bag 430 can be discharged through it. This allows for convenient cleaning of the dust inside the dust collection bag 430 without removing it, facilitating regular emptying of the dust.

[0038] In a further embodiment of this utility model, the fixing part 434 adopts a zipper or a self-sealing strip, both of which can block the dust collection outlet 432.

[0039] Furthermore, the fixing part 434 adopts a zipper. That is, when the zipper is opened, the dust collection outlet 432 can be opened. When the zipper is closed, the dust collection outlet 432 can be closed.

[0040] Furthermore, the fixing part 434 adopts a self-sealing chain. That is, when the self-sealing chain is opened, the dust collection outlet 432 can be opened. When the self-sealing chain is closed, the dust collection outlet 432 can be closed.

[0041] In some embodiments of this utility model, the side wall of the dust collection bag 430 has a folding part 433 and a fixing part 434. The dust collection bag 430 can be folded along the folding part 433 to form a folded state. When the dust collection bag 430 is in the folded state, it can block the dust collection outlet 432. The dust collection bag 430 is fixed and maintained in the folded state by the fixing part 434.

[0042] The folding part 433 and the fixing part 434 of the dust collection bag 430 work together to allow the dust collection bag 430 to be easily folded along the folding part 433 into a compact folded state. In this folded state, the dust collection bag 430 effectively seals the dust collection outlet 432, preventing dust leakage. Simultaneously, the dust collection bag 430 is securely fixed in this folded state by the fixing part 434, ensuring it will not easily unfold during use and storage, thus maintaining the overall cleanliness and efficient use of the dust collection bag. When the dust collection bag 430 is no longer folded and is in the open state, the dust collection outlet 432 opens, allowing the dust inside the dust collection bag 430 to be discharged through the dust collection outlet 432. This eliminates the need to remove the dust collection bag 430 for convenient cleaning and facilitates regular dust emptying.

[0043] In some specific embodiments of this utility model, the first filter dust outlet 412 is inserted into the dust collection inlet 431.

[0044] In a further embodiment of this utility model, the fixing part 434 adopts Velcro, snaps or rope, all of which can keep the dust bag 430 fixed in the folded state.

[0045] In some specific embodiments of this utility model, the fixing part 434 is a Velcro, wherein the fixing part 434 adopts a Velcro including a hook side and a rough side. The hook side is located on the lower side of the folding part 433, and the rough side is located on the upper side of the folding part 433. After the dust collection bag 430 is folded along the folding part 433, the hook side and the rough side are attached to each other, so that the dust collection bag 430 is kept in the folded state.

[0046] In some specific embodiments of this utility model, the fixing part 434 is a snap fastener, wherein the fixing part 434 adopts Velcro including a male snap and a female snap. The male snap is located on the lower side of the folding part 433, and the female snap is located on the upper side of the folding part 433. After the dust collection bag 430 is folded up along the folding part 433, the male snap and the female snap are attached to each other, so that the dust collection bag 430 is kept in the folded state.

[0047] In some specific embodiments of this utility model, the fixing part 434 is a binding rope, wherein the binding rope is located on the lower side of the folding part 433. After the dust collection bag 430 is folded along the folding part 433, the binding rope can tie the dust inlet 412 of the first filter, so that the dust collection bag 430 is kept in a folded state.

[0048] In some embodiments of this utility model, reference is made to Figure 3The second filter 500 includes a second filter housing 510, a second filter inlet 511 on the side wall of the second filter housing 510, a second filter outlet 512 on the upper side of the second filter housing 510, a second filter element 520 located inside the second filter housing 510, the second filter element 520 having an inner cavity that communicates with the second filter outlet 512; a vertical fixing screw 530 is provided inside the second filter housing 510, the second filter element 520 is fitted onto the vertical fixing screw 530, a second filter end cap 513 is provided on the lower side of the second filter housing 510, the upper end of the vertical fixing screw 530 is connected to the upper side wall of the second filter housing 510, the lower end of the vertical fixing screw 530 extends downward through the second filter element 520, and a fixing nut 531 is fitted onto the lower part of the vertical fixing screw 530, the upper side of the fixing nut 531 abuts against the bottom wall of the second filter element 520.

[0049] The second filter 500 is protected by a second filter housing 510. The side wall of the housing 510 has a second filter inlet 511 for guiding outside air into the filter. On the upper side of the second filter housing 510, a second filter outlet 512 is located to discharge the clean air filtered by the second filter element 520. The second filter element 520, located inside the second filter housing 510, has an inner cavity structure that communicates with the second filter outlet 512, ensuring smooth discharge of filtered air.

[0050] To further secure and adjust the position of the second filter element 520, a fixing nut 531 is fitted onto the lower part of the vertical fixing screw 530. This fixing nut 531, through rotation, allows its upper side to press against the lower side of the second filter element 520, thus providing stable support and precise position adjustment for the second filter element 520. The fixing nut 531, in conjunction with the vertical fixing screw 530, secures the second filter element 520. The second filter element 520 can be replaced simply by opening the second filter end cap 513 and removing the fixing nut 531.

[0051] In some embodiments of this utility model, the second filter end cap 513 has a second filter end cap through hole 514, the upper end of the vertical fixing screw 530 is connected to the upper side wall of the second filter housing 510, the lower end of the vertical fixing screw 530 passes through the second filter end cap through hole 514 and extends downward out of the second filter housing 510, and a fixing nut 531 is fitted on the lower part of the vertical fixing screw 530, with the upper side of the fixing nut 531 pressing against the lower side of the second filter end cap 513.

[0052] To ensure the secure installation of the second filter element 520, a vertical fixing screw 530 is specially provided inside the second filter housing 510. The upper end of the screw 530 is tightly connected to the upper side wall of the second filter housing 510, while the lower end passes through the through hole 514 on the second filter end cap 513 located on the lower side of the second filter housing 510 and extends downwards out of the second filter housing 510. The second filter end cap 513 not only serves to seal the bottom of the housing, but the through hole 514 on it also allows the vertical fixing screw 530 to move freely.

[0053] To further secure and adjust the position of the second filter element 520, an end cap nut 516 is fitted onto the lower part of the vertical fixing screw 530. This end cap nut 516, through rotation, can be adjusted so that its upper side presses against the lower side of the second filter end cap 513, thus providing stable support and precise position adjustment for the second filter element 520. Conversely, by unscrewing the end cap nut 516, the second filter end cap 513 can be removed, allowing the second filter element 520, originally fitted onto the vertical fixing screw 530, to be easily removed for cleaning or replacement. This design not only ensures stable filter operation but also facilitates subsequent maintenance and replacement operations.

[0054] In a further embodiment of the present invention, a screw connecting frame 515 is provided on the upper side wall of the second filter housing 510. The screw connecting frame 515 has a through hole to ensure that the air filtered by the second filter element 520 can pass through the screw connecting frame 515 and be discharged from the second filter outlet 512.

[0055] In a further embodiment of this utility model, the upper end of the vertical fixing screw 530 is fixed to the screw connecting bracket 515 by a screw fixing head 532.

[0056] In some embodiments of this utility model, the second filter element 520 has an inner cavity, and the second filter element sidewall 521 of the second filter element 520 adopts a filter paper or filter cotton structure to ensure the filtration effect of fine particulate dust in the air.

[0057] In some specific embodiments of this utility model, a second filter element bottom cover 522 is provided on the lower side of the second filter element 520.

[0058] In some specific embodiments of this utility model, a second filter element sealing strip 523 is provided on the upper side of the second filter element 520, and the second filter element sealing strip 523 is attached to the upper side wall of the second filter housing 510.

[0059] An injection molding machine according to a second aspect embodiment of the present invention includes a filter structure according to the first aspect embodiment of the present invention, with reference to... Figure 1The waste heat collection sleeve 200 has a waste heat collection sleeve air inlet 221 and a waste heat collection sleeve air outlet 222 on its upper rear side. The hopper 300 has a hopper air inlet 310 on its lower side wall and a hopper air outlet 320 on its upper side. An air outlet pipe 620 connects to the waste heat collection sleeve air outlet 222 and the hopper air inlet 310. A fan 621 and an electric heater 622 are connected to the air outlet pipe 620. The air inlet pipe 610 connects to the waste heat collection sleeve air inlet 221 and the hopper air outlet 320. The fan 621 drives the airflow in the single-loop waste heat recovery circulation system. The electric heater 622 heats the air entering the hopper 300, enabling the hopper 300 to heat and dry the plastic.

[0060] According to the embodiments of the present invention, by adopting the above-described filter structure, the thickness of the injection molding machine is reduced, which facilitates the miniaturization of the injection molding machine. Furthermore, it can improve the vibration and noise of the injection molding machine and enhance the user experience.

[0061] In some embodiments of this utility model, reference is made to Figure 1 , Figure 6 The waste heat collection sleeve 200 has a barrel receiving cavity 230, in which the barrel 100 is located. The waste heat collection sleeve 200 includes a sleeve shell 210 and a heat pipe 220. The heat pipe 220 is located inside the sleeve shell 210, and its two ends are connected to the waste heat collection sleeve inlet 221 and the waste heat collection sleeve outlet 222, respectively. The heat pipe 220 is bent to form several bending loops 223. Each bending loop 223 includes a straight loop portion 224 and a loop turning portion 225. The straight loop portions 224 are arranged to surround and form the barrel receiving cavity 230. This design helps to increase the heat exchange area between the heat pipe 220 and the barrel 100, thereby improving the heat absorption efficiency of the waste heat collection sleeve 200.

[0062] It must be noted that, provided they are connected to the heat pipe 220, the specific locations of the waste heat collection sleeve inlet 221 and outlet 222 within the waste heat collection sleeve 200 can be flexibly arranged as needed. For example, the waste heat collection sleeve inlet 221 and outlet 222 can be located on the front and rear sides, left and right sides, or other arrangements.

[0063] In some embodiments of this utility model, an elastic buckle 211 is provided on the lower part of the side wall of the sleeve housing 210, a collection sleeve bottom cover plate 240 is provided on the lower side of the sleeve housing 210, and a buckle plate 241 is provided on the outer edge of the collection sleeve bottom cover plate 240. The elastic buckle 211 can lock the buckle plate 241, ensuring that the sleeve housing 210 and the collection sleeve bottom cover plate 240 can be flexibly disassembled and assembled.

[0064] In a further embodiment of this utility model, a heat insulation layer 212 is provided between the heat pipe 220 and the housing 210 to reduce the outward dissipation of residual heat generated by the barrel 100.

[0065] In a further embodiment of the present invention, a heat-conducting layer 213 is covered on the outer wall of the bending circuit 223 to enable the residual heat generated by the barrel 100 to be transferred into the heat pipe 220 more quickly and evenly.

[0066] Other components and operations of the injection molding machine according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0067] The following is for reference. Figure 1 and Figure 2 The filtering structure according to an embodiment of the present invention is described in detail with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0068] like Figure 1 and Figure 2 As shown, the injection molding machine of this utility model embodiment includes a barrel 100, a waste heat collection sleeve 200, a hopper 300, a first filter 400, and a second filter 500.

[0069] The waste heat collection sleeve 200 is located outside the barrel 100. The waste heat collection sleeve 200 includes a sleeve shell 210, an elastic buckle 211, a heat insulation layer 212, a heat conduction layer 213, a heat pipe 220, a waste heat collection sleeve air inlet 221, a waste heat collection sleeve air outlet 222, a bending circuit 223, a straight section of the circuit 224, a turning section of the circuit 225, a barrel receiving cavity 230, a collection sleeve bottom cover plate 240, and a buckle plate 241.

[0070] The hopper 300 is equipped with an air inlet 310 and an air outlet 320. An air inlet pipe 610 and an air outlet pipe 620 connect the waste heat collection sleeve 200 and the hopper 300, forming a highly efficient single-loop waste heat recovery circulation structure. The air inlet pipe 610 is connected to a first filter 400 and a second filter 500. The air outlet pipe 620 is connected to a fan 621 and an electric heater 622. The first filter 400 includes a first filter housing 410, a first filter air inlet 411, a first filter dust outlet 412, a first filter end cap 413, a first filter air outlet 414, a first filter element 420, a first filter element sidewall 421, a first filter element bottom cap 422, a dust collection bag 430, a dust collection inlet 431, a dust collection outlet 432, a folding part 433, and a fixing part 434. The second filter 500 includes a second filter housing 510, a second filter air inlet 511, a second filter air outlet 512, a second filter end cap 513, a second filter end cap through hole 514, a screw connecting bracket 515, a second filter element 520, a second filter element sidewall 521, a second filter element bottom cap 522, a vertical fixing screw 530, a fixing nut 531, and a screw fixing head 532.

[0071] In some embodiments of this utility model, the working principle is as follows: Hot air is drawn out by the blower 621 and then enters the electric heater 622 of the hopper 300. The hot exhaust gas discharged from the hopper 300 is filtered and recovered by the first filter 400 and the second filter 500, and then re-enters the waste heat collection jacket inlet 221 of the waste heat collection jacket 200 through the pipeline. After being heated, it is discharged from the waste heat collection jacket outlet 222. This cycle is repeated to achieve a high-efficiency and energy-saving effect. In addition, the pipeline design described in this embodiment is matched with the blower 621, retaining the equipment's control system and original functions, which prevents the generation of high-temperature gas that burns the raw materials and maintains the energy-saving effect.

[0072] According to the filter structure of this utility model embodiment, at least the following effects can be achieved by setting it up as follows: the waste heat generated by the material cylinder 100 during the heating process is collected by the waste heat collection sleeve 200, and the airflow with waste heat enters the hopper 300 through the air outlet 620 to supplement the heating and drying work of the hopper 300. This not only reduces the outward dissipation of waste heat and improves the working environment, but also reduces the energy consumption of the hopper 300 during heating, achieving the effect of energy saving and emission reduction; the airflow with dust enters the air inlet 610 and is then filtered and purified by the first filter 400 and the second filter 500 in sequence. The first filter 400 is responsible for the initial filtration of the airflow entering the air inlet 610, and the second filter 500 is responsible for the fine filtration of the airflow entering the air inlet 610. This is sufficient to ensure that the airflow entering the waste heat collection sleeve 200 and even returning to the hopper 300 is sufficiently purified, which avoids blockage of the single loop of waste heat recovery circulation and also avoids dust accumulation and contamination of plastic raw materials.

[0073] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above 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 one or more embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A filter structure, characterized in that, include: A material cylinder (100) is provided with a waste heat collection sleeve (200) outside the material cylinder (100); The hopper (300) is connected to the waste heat collection sleeve (200) by an air inlet pipe (610) and an air outlet pipe (620). The first filter (400) is connected to the air inlet pipe (610). The first filter (400) includes an upper first filter element (420) and a lower dust collection bag (430). The second filter (500) is connected to the air inlet pipe (610). The second filter (500) is located between the first filter (400) and the waste heat collection sleeve (200). The second filter (500) includes a second filter element (520).

2. The filter structure according to claim 1, characterized in that, The first filter (400) includes a first filter housing (410), the side wall of the first filter housing (410) has a first filter air inlet (411), the lower side of the first filter housing (410) has a first filter dust outlet (412), and the dust collection bag (430) is connected to the first filter dust outlet (412); The first filter housing (410) is provided with a first filter end cap (413) on the upper side. The first filter end cap (413) has a first filter outlet (414) on the upper side. The first filter element (420) is located inside the first filter housing (410). The upper side of the first filter element (420) is connected to the lower side of the first filter end cap (413). The first filter element (420) has an inner cavity. The inner cavity of the first filter element (420) is connected to the first filter outlet (414).

3. The filter structure according to claim 1, characterized in that, The first filter element (420) has an inner cavity, and the first filter element sidewall (421) of the first filter element (420) adopts a metal filter structure.

4. The filter structure according to claim 1, characterized in that, The dust collection bag (430) has a dust collection inlet (431) on its upper side, which is located below the first filter element (420). The dust collection bag (430) has a dust collection outlet (432) on its lower side. The dust collection bag (430) has a fixing part (434) on its side wall, which can block the dust collection outlet (432).

5. The filter structure according to claim 4, characterized in that, The dust collection bag (430) has a folding part (433) and a fixing part (434) on its side wall. The dust collection bag (430) can be folded along the folding part (433) to form a folded state. When the dust collection bag (430) is in the folded state, it can block the dust collection outlet (432). The dust collection bag (430) is fixed and maintained in the folded state by the fixing part (434).

6. The filter structure according to claim 1, characterized in that, The second filter (500) includes a second filter housing (510), the side wall of the second filter housing (510) has a second filter inlet (511), the upper side of the second filter housing (510) has a second filter outlet (512), the second filter element (520) is located inside the second filter housing (510), the second filter element (520) has an inner cavity, and the inner cavity of the second filter element (520) communicates with the second filter outlet (512); A vertical fixing screw (530) is provided inside the second filter housing (510). The second filter element (520) is fitted onto the vertical fixing screw (530). A second filter end cap (513) is provided on the lower side of the second filter housing (510). The upper end of the vertical fixing screw (530) is connected to the upper side wall of the second filter housing (510). The lower end of the vertical fixing screw (530) extends downward through the second filter element (520). A fixing nut (531) is fitted on the lower part of the vertical fixing screw (530). The upper side of the fixing nut (531) abuts against the bottom wall of the second filter element (520).

7. The filter structure according to claim 1, characterized in that, The second filter element (520) has an inner cavity, and the second filter element sidewall (521) of the second filter element (520) is made of filter paper or filter cotton.

8. An injection molding machine, characterized in that, The filter structure includes the following features: the upper rear side of the waste heat collection sleeve (200) has a waste heat collection sleeve air inlet (221) and a waste heat collection sleeve air outlet (222); the lower side wall of the hopper (300) has a hopper air inlet (310); the upper side of the hopper (300) has a hopper air outlet (320); the air outlet pipe (620) is connected to the waste heat collection sleeve air outlet (222) and the hopper air inlet (310); a fan (621) and an electric heater (622) are connected to the air outlet pipe (620); and the air inlet pipe (610) is connected to the waste heat collection sleeve air inlet (221) and the hopper air outlet (320).

9. The injection molding machine according to claim 8, characterized in that, The waste heat collection sleeve (200) has a barrel receiving cavity (230), the barrel (100) is located in the barrel receiving cavity (230), the waste heat collection sleeve (200) includes a sleeve shell (210) and a heat pipe (220), the heat pipe (220) is located in the sleeve shell (210), and the two ends of the heat pipe (220) are respectively connected to the air inlet (221) and the air outlet (222) of the waste heat collection sleeve; The heat pipe (220) is bent to form a plurality of bent loops (223), each bent loop (223) including a straight loop portion (224) and a loop turning portion (225), and each of the straight loop portions (224) is arranged to surround and form the material cylinder receiving cavity (230).

10. The injection molding machine according to claim 9, characterized in that, The lower part of the side wall of the sleeve (210) is provided with an elastic buckle (211), and the lower side of the sleeve (210) is provided with a collection sleeve bottom cover plate (240). The outer edge of the collection sleeve bottom cover plate (240) is provided with a buckle plate (241), and the elastic buckle (211) can lock the buckle plate (241).

Images