A plastic pellet preheating device for an injection molding machine
By incorporating an air intake mechanism with adjustable air inlet position and a stirring mechanism into the plastic granule preheating device, the problem of uneven temperature was solved, thereby improving preheating efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GAOBEIDIANSHI FENGYE RUBBER SEALS CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-14
Smart Images
Figure CN224489951U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic granule preheating technology, specifically to a plastic granule preheating device for injection molding machines. Background Technology
[0002] A plastic granule preheating device for injection molding machines is an auxiliary device that improves injection molding efficiency, product quality, and energy saving by preheating plastic granules (such as polyethylene, polypropylene, ABS, etc.) to achieve a more uniform molten state. Its core function is to reduce the heating load on the injection molding machine barrel by controlling temperature and heating time, thereby improving the flowability of the plastic and reducing product defects.
[0003] Existing plastic granule preheating devices typically use a fan to drive hot air to convect and exchange heat with the granules to achieve the preheating function. However, poor temperature uniformity during the waste heat process is a core issue that restricts product quality. Traditional hot air circulation devices often use a fixed air inlet design, and the flow path of hot air in the hopper or drum is uncontrollable, leading to local overheating or underheating of the granules. Uneven temperature can easily cause material degradation, resulting in defects such as bubbles and discoloration, which affect the dimensional accuracy and surface finish of the products. Utility Model Content
[0004] To overcome the above-mentioned defects, this utility model provides a plastic granule preheating device for injection molding machines, which solves the technical problem that uneven preheating temperature easily affects product quality during the preheating process of plastic granules in the prior art.
[0005] According to one aspect, at least one embodiment of the present invention provides a plastic granule preheating device for an injection molding machine, installed on the injection molding machine body, including a feeding hopper with a feeding port, a cover plate installed on the top side wall of the feeding port, the feeding hopper being installed on the injection molding machine body, and further including a fixed plate, a protective cover, a support tube, an air intake mechanism, and a stirring mechanism, the fixed plate being fixedly disposed in the feeding hopper, the fixed plate having a discharge port with a built-in discharge control valve, the protective cover being fixedly disposed on the feeding hopper, the support tube being rotatably disposed through and rotatably disposed on the inner top wall of the feeding hopper, the top end of the support tube being rotatably connected to the top side wall of the protective cover, the bottom end of the support tube being sealed, the air intake mechanism being disposed on the support tube for introducing hot air into the feeding hopper, and the stirring mechanism being disposed in the feeding hopper for stirring the plastic granules.
[0006] Preferably, the air intake mechanism includes an air intake pipe, a heating box, a fan, an exhaust port, and a rotating mechanism. Multiple air intake pipes are connected to the bottom end of the side wall of the support pipe. The end of each air intake pipe away from the support pipe is sealed. Multiple air intake holes are opened on the bottom side wall of the air intake pipe. The heating box and the fan are mounted on the injection molding machine body. The input end of the fan is connected to the heating box, and the output end of the fan extends through the protective cover into the support pipe. An air intake port is opened on the heating box, and an exhaust port is opened at the top end of the side wall of the feeding hopper. The rotating mechanism is located inside the protective cover and is used to drive the support pipe to rotate.
[0007] Furthermore, filters are installed inside both the air inlet and the exhaust outlet.
[0008] Furthermore, the rotating mechanism includes a first gear ring, a first gear, and a first motor. The first gear ring is fixedly disposed on the outer wall of the support tube, the first gear is rotatably disposed on the inner top wall of the protective cover, the first gear meshes with the first gear ring, and the first motor is mounted on the protective cover, with the output end of the first motor fixedly connected to the first gear.
[0009] Furthermore, the stirring mechanism includes a supporting shell, a positioning tube, a stirring assembly, and a driving mechanism. The supporting shell is rotatably mounted on the supporting tube, and the positioning tube is fixedly mounted on the top side wall of the supporting shell. The top side wall of the positioning tube extends through the top side wall of the feeding hopper and into the protective cover. The positioning tube is rotatably connected to the top side wall of the feeding hopper. The stirring assembly is mounted on the supporting shell and is used to stir the plastic granules. The driving mechanism is mounted inside the protective cover and is used to drive the positioning tube to rotate.
[0010] Based on the above scheme, the stirring assembly includes stirring rods and stirring bars. Multiple stirring rods are rotatably arranged on the outer wall of the support housing, and multiple stirring bars are fixedly arranged on the side wall of the stirring rods.
[0011] Based on the above scheme, the driving mechanism includes a second gear ring, a second gear, and a second motor. The second gear ring is fixedly disposed on the outer wall of the positioning tube, the second gear is rotatably disposed on the top side wall of the feeding hopper, the second gear meshes with the second gear ring, and the second motor is mounted on the protective cover. The output end of the second motor is fixedly connected to the second gear.
[0012] Based on the above scheme, the end of the stirring rod near the support tube extends through the side wall of the support housing and into the support housing. A first bevel gear is fixedly installed at the end of the stirring rod near the support tube, and a second bevel gear is fixedly installed on the outer wall of the support tube. The second bevel gear meshes with the first bevel gear.
[0013] The beneficial effects of the embodiments of this utility model are as follows:
[0014] 1. In this utility model, by setting up an air intake mechanism, the fan and heating box can blow hot air in through the air intake hole during operation. At the same time, the operation of the first motor can drive the first gear to rotate. Simultaneously, the meshing of the first gear and the first gear ring drives the support tube to rotate, thereby facilitating the adjustment of the position of the air intake pipe and the air intake hole, and thus facilitating the improvement of the preheating efficiency of the plastic particles.
[0015] 2. In this utility model, by setting up a stirring mechanism, the second motor can drive the second gear to rotate. At the same time, the meshing of the second gear and the second gear ring drives the positioning tube and the support housing to rotate in the opposite direction to the support tube, thereby driving the stirring rod and stirring bar to stir the plastic particles. During the rotation of the support housing, the first bevel gear can be driven to move around the second bevel gear. Then, the meshing of the first bevel gear and the second bevel gear drives the stirring rod to rotate, thereby facilitating the stirring of the plastic particles by the stirring rod and stirring bar, thereby further improving the preheating efficiency of the plastic particles. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a plastic granule preheating device for an injection molding machine in one embodiment of the present invention;
[0018] Figure 2 for Figure 1 A cross-sectional schematic diagram of a plastic granule preheating device for an injection molding machine in one embodiment;
[0019] Figure 3 for Figure 1 A cross-sectional structural schematic diagram of the air intake mechanism in the embodiment;
[0020] Figure 4 for Figure 1 A cross-sectional structural schematic diagram of the rotating mechanism in the embodiment;
[0021] Figure 5 for Figure 1 The embodiment is shown in the cross-sectional view of the stirring mechanism.
[0022] In the diagram: 1. Injection molding machine body; 2. Feed hopper; 3. Cover plate; 4. Fixed plate; 5. Protective cover; 6. Support pipe; 7. Air inlet pipe; 8. Heating box; 9. Fan; 10. Exhaust port; 11. First gear ring; 12. First gear; 13. First motor; 14. Support housing; 15. Positioning pipe; 16. Stirring rod; 17. Second gear ring; 18. Second gear; 19. Second motor; 20. First bevel gear; 21. Second bevel gear. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.
[0024] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0025] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.
[0028] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] like Figures 1-5 As shown, this invention illustrates a plastic granule preheating device for an injection molding machine, installed on the injection molding machine body 1. It includes a feeding hopper 2 with a feeding port. A cover plate 3 is installed on the top side wall of the feeding port. The feeding hopper 2 is also installed on the injection molding machine body 1, and further includes a fixed plate 4, a protective cover 5, a support pipe 6, an air intake mechanism, and a stirring mechanism. The fixed plate 4 is fixedly disposed inside the feeding hopper 2 and has a discharge port with a built-in discharge control valve. The protective cover 5 is fixedly disposed on the feeding hopper 2. The support pipe 6 passes through and is rotatably disposed on the inner top wall of the feeding hopper 2. The top end of the support pipe 6 is rotatably connected to the top side wall of the protective cover 5, and the bottom end of the support pipe 6 is sealed. The air intake mechanism is disposed on the support pipe 6 for introducing hot air into the feeding hopper 2. The stirring mechanism is disposed inside the feeding hopper 2 for stirring the plastic granules.
[0030] Reference Figures 1-3The air intake mechanism includes an air intake pipe 7, a heating box 8, a fan 9, an exhaust port 10, and a rotating mechanism. Multiple air intake pipes 7 are connected to the bottom end of the side wall of the support pipe 6. The end of the air intake pipe 7 away from the support pipe 6 is sealed. Multiple air intake holes are opened on the bottom side wall of the air intake pipe 7. The heating box 8 and the fan 9 are installed on the injection molding machine body 1. The input end of the fan 9 is connected to the heating box 8, and the output end of the fan 9 extends into the support pipe 6 through the protective cover 5. The heating box 8 is provided with an air intake port, and the top of the side wall of the feed hopper 2 is provided with an exhaust port 10. The rotating mechanism is set inside the protective cover 5 and is used to drive the support pipe 6 to rotate. Filter screens are installed in both the air intake port and the exhaust port 10. Specifically, during the operation of the fan 9 and the heating box 8, hot air can be blown in through the air intake holes to preheat the plastic particles.
[0031] Reference Figures 1-4 The rotating mechanism includes a first gear ring 11, a first gear 12, and a first motor 13. The first gear ring 11 is fixedly mounted on the outer wall of the support tube 6, and the first gear 12 is rotatably mounted on the inner top wall of the protective cover 5. The first gear 12 meshes with the first gear ring 11. The first motor 13 is mounted on the protective cover 5, and the output end of the first motor 13 is fixedly connected to the first gear 12. Specifically, the operation of the first motor 13 can drive the first gear 12 to rotate, and at the same time, the meshing of the first gear 12 and the first gear ring 11 drives the support tube 6 to rotate, thereby facilitating the adjustment of the position of the air inlet pipe 7 and the air inlet hole, and thus facilitating the improvement of the preheating efficiency of the plastic granules.
[0032] Reference Figures 3-5The stirring mechanism includes a support housing 14, a positioning tube 15, a stirring assembly, and a drive mechanism. The support housing 14 is rotatably mounted on the support tube 6, and the positioning tube 15 is fixedly mounted on the top side wall of the support housing 14. The top side wall of the positioning tube 15 penetrates the top side wall of the feed hopper 2 and extends into the protective cover 5. The positioning tube 15 is rotatably connected to the top side wall of the feed hopper 2. The stirring assembly is mounted on the support housing 14 and is used to stir the plastic granules. The drive mechanism is located inside the protective cover 5 and is used to drive the positioning tube 15 to rotate. The stirring assembly includes stirring rods 16 and stirring bars. Multiple stirring rods 16 are rotatably mounted on the outer wall of the support housing 14, and the side walls of the stirring rods 16 are fixedly mounted. There are multiple stirring rods. The driving mechanism includes a second gear ring 17, a second gear 18, and a second motor 19. The second gear ring 17 is fixedly mounted on the outer wall of the positioning tube 15. The second gear 18 is rotatably mounted on the top side wall of the feeding hopper 2. The second gear 18 meshes with the second gear ring 17. The second motor 19 is mounted on the protective cover 5. The output end of the second motor 19 is fixedly connected to the second gear 18. Specifically, the operation of the second motor 19 can drive the second gear 18 to rotate. At the same time, the meshing of the second gear 18 with the second gear ring 17 can drive the positioning tube 15 and the support housing 14 to rotate, thereby driving the stirring rod 16 and the stirring rod to stir the plastic particles.
[0033] Reference Figure 3 and Figure 4 The stirring rod 16 extends into the support housing 14 through the side wall of the support housing 14 at one end near the support tube 6. A first bevel gear 20 is fixedly installed at the end of the stirring rod 16 near the support tube 6, and a second bevel gear 21 is fixedly installed on the outer wall of the support tube 6. The second bevel gear 21 meshes with the first bevel gear 20. Specifically, during the rotation of the support housing 14, the first bevel gear 20 can be driven to move around the second bevel gear 21. In turn, the meshing of the first bevel gear 20 and the second bevel gear 21 drives the stirring rod 16 to rotate, thereby facilitating the stirring of plastic granules by the stirring rod 16 and the stirring bar, thereby further improving the preheating efficiency of the plastic granules.
[0034] Specifically, the operator adds plastic granules into the feed hopper 2 through the feed inlet and then closes the cover plate 3. The operator then controls the first motor 13, the fan 9, and the hot air box 8. During operation, the fan 9 and the heating box 8 blow hot air in through the air inlet. Simultaneously, the operation of the first motor 13 drives the first gear 12 to rotate. The meshing of the first gear 12 and the first gear ring 11 drives the support pipe 6 to rotate, facilitating the adjustment of the position of the air inlet pipe 7 and the air inlet, thereby improving the preheating efficiency of the plastic granules. At the same time, the operator controls the second motor 19 to operate... The operation of 19 drives the second gear 18 to rotate. Simultaneously, the meshing of the second gear 18 with the second gear ring 17 drives the positioning tube 15 and the support housing 14 to rotate in the opposite direction to the support tube 6. This drives the stirring rod 16 and the stirring bar to stir the plastic particles. At the same time, during the rotation of the support housing 14, the first bevel gear 20 can be driven to move around the second bevel gear 21. Then, the meshing of the first bevel gear 20 and the second bevel gear 21 drives the stirring rod 16 to rotate, which facilitates the stirring of the plastic particles by the stirring rod 16 and the stirring bar, thereby further improving the preheating efficiency of the plastic particles.
[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A plastic granule preheating device for an injection molding machine, installed on the injection molding machine body (1), comprising a feeding bin (2), wherein the feeding bin (2) has a feeding port, and a cover plate (3) is installed on the top side wall of the feeding port, the feeding bin (2) being installed on the injection molding machine body (1), characterized in that, Also includes: Fixed plate (4), the fixed plate (4) is fixedly installed in the feed bin (2), the fixed plate (4) is provided with a discharge port, and the discharge port is equipped with a discharge control valve; A protective cover (5) is fixedly installed on the feed hopper (2); Support pipe (6), the support pipe (6) is installed through and rotatably on the inner top wall of the feed hopper (2), the top end of the support pipe (6) is rotatably connected to the top side wall of the protective cover (5), and the bottom end of the support pipe (6) is sealed. An air intake mechanism is provided on the support pipe (6) for introducing hot air into the feed bin (2); A stirring mechanism is provided inside the feed hopper (2) for stirring plastic granules.
2. The plastic granule preheating device for an injection molding machine according to claim 1, characterized in that, The air intake mechanism includes: The bottom end of the side wall of the support pipe (6) is connected to the air intake pipe (7), and the end of the air intake pipe (7) away from the support pipe (6) is sealed. The bottom side wall of the air intake pipe (7) is provided with multiple air intake holes. A heating box (8) and a fan (9) are installed on the injection molding machine body (1). The input end of the fan (9) is connected to the heating box (8), and the output end of the fan (9) extends through the protective cover (5) into the support tube (6). The heating box (8) is provided with an air inlet; The exhaust port (10) is provided at the top of the side wall of the feed hopper (2). A rotating mechanism is provided inside the protective cover (5) to drive the support tube (6) to rotate.
3. A plastic granule preheating device for an injection molding machine according to claim 2, characterized in that, Both the air inlet and the exhaust outlet (10) are equipped with filters.
4. A plastic granule preheating device for an injection molding machine according to claim 3, characterized in that, The rotating mechanism includes: The first toothed ring (11) is fixedly disposed on the outer wall of the support tube (6); The first gear (12) is rotatably mounted on the inner top wall of the protective cover (5), and the first gear (12) meshes with the first gear ring (11); The first motor (13) is mounted on the protective cover (5), and the output end of the first motor (13) is fixedly connected to the first gear (12).
5. A plastic granule preheating device for an injection molding machine according to claim 4, characterized in that, The stirring mechanism includes: A support housing (14) is rotatably mounted on the support tube (6); Positioning tube (15), the positioning tube (15) is fixedly installed on the top side wall of the support housing (14), the top side wall of the positioning tube (15) penetrates the top side wall of the feed hopper (2) and extends into the protective cover (5); The positioning tube (15) is rotatably connected to the top side wall of the feeding bin (2); A stirring assembly is disposed on the support housing (14) for stirring plastic particles; A drive mechanism is provided inside the protective cover (5) and is used to drive the positioning tube (15) to rotate.
6. A plastic granule preheating device for an injection molding machine according to claim 5, characterized in that, The stirring assembly includes: Stirring rod (16): Multiple stirring rods (16) are rotatably disposed on the outer wall of the support housing (14). Stirring rods, a plurality of stirring rods are fixedly provided on the side wall of the stirring rod (16).
7. A plastic granule preheating device for an injection molding machine according to claim 6, characterized in that, The drive mechanism includes: The second toothed ring (17) is fixedly disposed on the outer wall of the positioning tube (15); The second gear (18) is rotatably mounted on the top side wall of the feed hopper (2), and the second gear (18) meshes with the second gear ring (17); The second motor (19) is mounted on the protective cover (5), and the output end of the second motor (19) is fixedly connected to the second gear (18).
8. A plastic granule preheating device for an injection molding machine according to claim 7, characterized in that, The stirring rod (16) extends into the support housing (14) through the side wall of the support housing (14) at one end near the support tube (6). A first bevel gear (20) is fixedly provided at one end of the stirring rod (16) near the support tube (6), and a second bevel gear (21) is fixedly provided on the outer wall of the support tube (6). The second bevel gear (21) meshes with the first bevel gear (20).