Multi-material circulating feeding system

Abstract

The utility model discloses a multi-material circulating feeding system, which belongs to the technical field of injection molding processing, and comprises a plurality of groups of raw material circulating modules and a plurality of groups of feeding injection molding modules, the raw material circulating modules comprise storage devices, drying devices and circulating feeding devices, and the feeding injection molding modules are arranged on the storage devices. The storage device, the drying device and the circulating feeding device are sequentially connected, each feeding injection molding module comprises a feeding device and an injection molding device, the feeding devices are connected with the injection molding devices, and the feeding devices in each feeding injection molding module are connected with the circulating feeding devices in the multiple raw material circulating modules; the drying device comprises a double-bin assembly, a drying assembly and a stirring assembly. According to the mode, the two stock bins of the double-stock-bin assembly are arranged and matched with the drying assembly and the stirring assembly, the raw material drying effect is improved, meanwhile, recycled raw materials directly enter the stock bins below the double-stock-bin assembly, the secondary drying time is shortened, and the use efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a multi-material circulating feeding system. Background Technology

[0002] For injection-molded products such as storage boxes, the main production method involves adding plastic granules as raw materials into an injection molding machine, heating and melting them, and then molding them in an injection mold. The plastic granules generally need to be dried before being fed into the machine.

[0003] For example, Chinese patent application CN115214047B discloses an intelligent dehumidification and drying feeding system for injection molding workshops, including a feeding support frame. The feeding support frame is equipped with a cleaning box and a mixing tank from top to bottom. The mixing tank is equipped with a dehumidification and drying device for dehumidifying and drying plastic particles and uniformly mixing various plastic particles. The cleaning box is used for blowing and removing impurities from the plastic particles. The cleaning box is equipped with a metering box on both the left and right sides for quantitative weighing of plastic particles.

[0004] However, the intelligent dehumidification and drying feeding system in this injection molding workshop only operates in a single mixing tank during drying, resulting in poor drying effect and making it difficult to ensure that the raw materials are completely dry before feeding.

[0005] Based on this, the present invention designs a multi-material circulating feeding system to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a multi-material circulation feeding system.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A multi-material circulation feeding system includes a raw material circulation module and a feeding injection molding module;

[0009] The raw material circulation module and the feeding injection molding module are each provided in multiple sets. The raw material circulation module includes a storage device, a drying device, and a circulating feeding device, which are connected in sequence. The feeding injection molding module includes a feeding device and an injection device, which are connected in sequence. The feeding device in each set of feeding injection molding modules is connected to the circulating feeding device in multiple sets of raw material circulation modules. The multiple feeding devices are evenly distributed on the line of the circulating feeding device, and the circulating feeding device gives priority to feeding the feeding device that is closer to it.

[0010] The drying device includes a dual-bin assembly for segmented drying, a drying assembly for heating and dehydration, and a stirring assembly for mixing the raw materials. The inlet and outlet of the dual-bin assembly are connected to a storage device and a circulating feeding device, respectively. The drying assembly and the stirring assembly are both connected to the dual-bin assembly.

[0011] Furthermore, the storage device includes a raw material silo and a conveying pipe. One end of the conveying pipe is connected to and fixedly connected to the outlet of the raw material silo, and the other end of the conveying pipe is connected to the inlet at the top of the dual silo assembly.

[0012] Furthermore, the dual-bin assembly includes a drying support, an outer drying chamber, an inner drying chamber, a filter screen, and a raw material feed pipe. The outer drying chamber is fixedly installed on the top of the drying support, and the inner drying chamber is rotatably installed inside the outer drying chamber. A filter screen is fixedly installed at the bottom of the inner drying chamber. A raw material feed pipe is fixedly installed at the feed inlet at the top of the outer drying chamber, and the bottom of the raw material feed pipe extends into the inner drying chamber. One end of the circulating feed pipe is connected to and fixedly connected to the bottom of the inner drying chamber. The outer drying chamber is connected to both the drying component and the stirring component. The inner drying chamber is connected to the stirring component, and the filter screen is connected to the stirring component. The top of the raw material feed pipe is fixedly connected to the other end of the conveying pipe, and the other end of the circulating feed pipe is connected to the circulating feeding device. A discharge pipe is fixedly installed at the bottom of the outer drying chamber, and a control valve is installed on the outside of the discharge pipe of the outer drying chamber. The discharge pipe of the outer drying chamber is connected to the circulating feeding device.

[0013] Furthermore, the drying assembly includes a hot air blower, an air inlet pipe, and two baffles. The air inlet pipe is configured as a three-way pipe. The hot air blower is located on one side of the outer side of the drying chamber. The air outlet of the hot air blower is connected and fixedly connected to one end of the air inlet pipe. The other two ends of the air inlet pipe pass through and are fixedly installed at the bottom of the side wall of the drying chamber. The two baffles are respectively fixedly installed on two openings of the air inlet pipe located inside the drying chamber.

[0014] Furthermore, the stirring assembly includes a stirring motor, a planetary gear set, a rotating shaft, a dispersing disc, spiral blades, and multiple sets of stirring components. The planetary gear set consists of a sun gear, multiple planetary gears, a fixed plate, and an external gear ring. The stirring motor is fixedly installed on the top outer side of the drying outer chamber. The fixed plate of the planetary gear set is fixedly installed on the inner top of the drying outer chamber. The output end of the stirring motor rotates through and extends into the interior of the drying outer chamber and is fixedly connected to the sun gear of the planetary gear set. Multiple sets of stirring components are respectively installed at the bottom of multiple planetary gears of the planetary gear set. The top of the rotating shaft is fixedly connected to the sun gear of the planetary gear set. The bottom of the rotating shaft passes through the drying inner chamber and is rotatably connected to the inner bottom wall of the drying outer chamber. The rotating shaft is rotatably connected to the filter screen. The top of the drying inner chamber is fixedly connected to the external gear ring of the planetary gear set. The dispersing disc is fixedly installed on the top outer side of the rotating shaft. The spiral blades are fixedly installed on the bottom outer side of the rotating shaft and are located below the filter screen.

[0015] Furthermore, the stirring assembly also includes a stirring shaft and multiple stirring blades. The multiple stirring blades are evenly and fixedly installed on the outside of the stirring shaft. The stirring shaft is rotatably installed inside the drying chamber. The top of the circulating feed pipe is fixedly installed on the bottom of the planetary gear of the planetary gear set. The dispersing disc is conical in shape. An arc-shaped baffle is fixedly installed on the outside of the dispersing disc. The bottom of the raw material feed pipe faces the dispersing disc.

[0016] Furthermore, the circulating feeding device includes a circulating conveying pipe and a vacuum conveyor. One end of the circulating conveying pipe is fixedly connected to the discharge pipe of the drying outer chamber, and the other end of the circulating conveying pipe is provided with a three-way discharge pipe. One outlet of the three-way discharge pipe is fixedly connected to the circulating feed pipe, and the other outlet of the three-way discharge pipe is connected to the mixing assembly 41 of multiple sets of feeding injection molding modules. The vacuum conveyor is fixedly installed on the outside of the circulating conveying pipe and is used to drive the conveying of raw materials inside the circulating conveying pipe.

[0017] Furthermore, the injection molding device includes an injection molding machine and a feeding pipe. One end of the feeding pipe is fixedly connected to the discharge pipe of the feeding device, and the other end of the feeding pipe is fixedly connected to the feed port of the injection molding machine.

[0018] Compared with the prior art, the advantages of this utility model are as follows:

[0019] 1. This utility model improves the drying effect of raw materials by setting up two hoppers in the dual-hopper assembly, in conjunction with the drying and stirring components. At the same time, the recycled raw materials directly enter the lower hopper of the dual-hopper assembly, reducing the secondary drying time and improving the efficiency. By setting up multiple circulating feeding devices to prioritize feeding materials to the nearest feeding device, when multiple feeding devices need raw materials, they will first take materials from the nearest circulating feeding device and weigh them. This avoids the situation where multiple feeding devices take materials from the same circulating feeding device, resulting in insufficient raw materials in some circulating feeding devices and excessive raw materials in other circulating feeding devices.

[0020] 2. This utility model ensures the drying effect of raw materials and improves product quality by separating the outer drying chamber and the inner drying chamber. The setting of the dispersion plate makes the incoming raw materials dispersed around the inner drying chamber, avoiding accumulation and improving the drying effect. Air is supplied from both sides of the outer drying chamber through the air inlet pipe at the same time, avoiding the situation where some raw materials are overheated and others are not dried due to excessive hot air concentration. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the multi-material circulating feeding system of this utility model;

[0023] Figure 2 This is a perspective view of the multi-material circulating feeding system of this utility model;

[0024] Figure 3 This is a right view of the multi-material circulating feeding system of this utility model;

[0025] Figure 4 For along Figure 3 A three-dimensional diagram of AA with a portion removed;

[0026] Figure 5 This is an anatomical diagram of the stirring assembly of this utility model;

[0027] Figure 6 This is a perspective view of the feeding device of this utility model;

[0028] Figure 7 This is a partial three-dimensional view of the feeding device of this utility model. Figure 1 ;

[0029] Figure 8 This is a partial three-dimensional view of the feeding device of this utility model. Figure 2 ;

[0030] Figure 9 This is a perspective view of the drying inner chamber of this utility model.

[0031] The labels in the diagram represent:

[0032] 1. Storage device; 11. Raw material silo; 12. Conveying pipe; 2. Drying device; 21. Dual silo assembly; 211. Drying support; 212. Outer drying chamber; 213. Inner drying chamber; 214. Filter screen; 215. Raw material feed pipe; 216. Circulating feed pipe; 22. Drying assembly; 221. Hot air blower; 222. Air inlet pipe; 223. Material baffle; 23. Mixing assembly; 231. Mixing motor; 232. Planetary gear set; 233. Rotating shaft; 234. Dispersion disc; 235. Spiral blades; 236. Mixing shaft; 237. Stirring 3. Mixing blades; 31. Circulating feeding device; 32. Circulating conveying pipe; 4. Vacuum conveyor; 4. Feeding device; 41. Mixing assembly; 411. Mixing support; 412. Mixing hopper; 413. Mixing feed pipe; 42. Weighing assembly; 421. Drive motor; 422. Rotating rod; 423. Rotating seat; 424. Weight sensor; 425. Pulley; 426. Paddle; 427. Torsion spring; 43. Receiving assembly; 431. Receiving rack; 432. Receiving cylinder; 433. Baffle; 5. Injection molding device; 51. Injection molding machine; 52. Feeding pipe. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-9 A multi-material circulating feeding system includes a raw material circulating module and a feeding injection molding module. Both the raw material circulating module and the feeding injection molding module are provided in multiple sets. The raw material circulating module includes a storage device 1, a drying device 2, and a circulating feeding device 3, which are connected in sequence. The feeding injection molding module includes a feeding device 4 and an injection molding device 5, which are connected. The feeding device 4 in each set of feeding injection molding modules is connected to the circulating feeding device 3 in multiple sets of raw material circulating modules. The multiple feeding devices 4 are evenly distributed on the line of the circulating feeding device 3, and the circulating feeding device 3 gives priority to feeding the feeding device 4 that is closer.

[0035] The drying device 2 includes a dual-bin assembly 21 for segmented drying, a drying assembly 22 for heating and dehydration, and a stirring assembly 23 for stirring the raw materials. The inlet and outlet of the dual-bin assembly 21 are connected to the storage device 1 and the circulating feeding device 3, respectively. The drying assembly 22 and the stirring assembly 23 are both connected to the dual-bin assembly 21.

[0036] The feeding device 4 includes a mixing component 41 for mixing multiple raw materials, a weighing component 42 for accurately weighing the raw materials, and a receiving component 43 for receiving the raw materials during weighing. The inlet and outlet of the mixing component 41 are connected to the circulating feeding device 3 and the injection molding device 5, respectively. The weighing component 42 and the receiving component 43 are both connected to the mixing component 41, and the weighing component 42 is connected to the receiving component 43.

[0037] When the multi-material circulating feeding system is in normal use, the raw materials from the storage device 1 enter the upper hopper of the dual-hopper assembly 21. The drying assembly 22 and the stirring assembly 23 are activated. The drying assembly 22 supplies hot air to the dual-hopper assembly 21 to dry the raw materials, while the stirring assembly 23 stirs the raw materials. Some of the raw materials fall into the lower hopper of the dual-hopper assembly 21 under the stirring of the stirring assembly 23 for further drying. The dried raw materials are circulated and conveyed by the circulating feeding device 3. The weighing assembly 42 is activated and moves to the lower part of the corresponding receiving assembly 43, thereby weighing the raw materials in different groups of the circulating feeding device 3 in sequence. The weighed raw materials are mixed in the mixing assembly 41 and conveyed to the injection molding device 5 for injection molding. The unused raw materials in the circulating feeding device 3 are circulated back to the lower hopper of the dual-hopper assembly 21 for drying and then reused.

[0038] The dual-hopper assembly 21, with its two hoppers, combined with the drying assembly 22 and the mixing assembly 23, improves the drying effect of raw materials. Simultaneously, recycled raw materials directly enter the lower hopper of the dual-hopper assembly 21, reducing secondary drying time and increasing efficiency. Multiple circulating feeding devices 3 prioritize feeding materials to the nearest feeding device 4, ensuring that when multiple feeding devices 4 require raw materials, they first take and weigh materials from the nearest circulating feeding device 3. This avoids situations where multiple feeding devices 4 take materials from the same circulating feeding device 3, resulting in insufficient raw materials in some devices and excessive raw materials in others. The weighing assembly 42 and the receiving assembly 43 accurately weigh different raw materials before mixing, and when weighing subsequent materials, the previous material automatically falls off. The structure is simple and the measurement is accurate.

[0039] In some embodiments, the storage device 1 includes a raw material bin 11 and a conveying pipe 12. One end of the conveying pipe 12 is connected to and fixedly connected to the outlet of the raw material bin 11, and the other end of the conveying pipe 12 is connected to the inlet at the top of the dual-bin assembly 21.

[0040] In some embodiments, the dual-bin assembly 21 includes a drying support 211, an outer drying chamber 212, an inner drying chamber 213, a filter screen 214, and a raw material feed pipe 215. The outer drying chamber 212 is fixedly installed on the top of the drying support 211, and the inner drying chamber 213 is rotatably installed inside the outer drying chamber 212. The filter screen 214 is fixedly installed at the bottom of the inner drying chamber 213. The raw material feed pipe 215 is fixedly installed at the feed inlet at the top of the outer drying chamber 212, and the bottom of the raw material feed pipe 215 extends into the inner drying chamber 213. One end of the circulating feed pipe 216 is connected to the drying chamber. The bottom of the outer chamber 212 is connected and fixedly connected. The outer drying chamber 212 is connected to the drying component 22 and the stirring component 23. The inner drying chamber 213 is connected to the stirring component 23. The filter screen 214 is connected to the stirring component 23. The top of the raw material feed pipe 215 is connected and fixedly connected to the other end of the conveying pipe 12. The other end of the circulating feed pipe 216 is connected to the circulating feeding device 3. The bottom of the outer drying chamber 212 is fixedly provided with a discharge pipe. A control valve is provided on the outside of the discharge pipe of the outer drying chamber 212. The discharge pipe of the outer drying chamber 212 is connected to the circulating feeding device 3.

[0041] The inner drying chamber 213 is divided into upper and lower parts. The lower part of the inner drying chamber 213 is fitted onto the outer side of the upper part of the inner drying chamber 213. The upper and lower parts of the inner drying chamber 213 are connected by a limiting sliding connection. The outer side of the lower part of the inner drying chamber 213 is slidably connected to the inner wall of the middle part of the outer drying chamber 212. A corrugated support plate is fixedly installed on the inner wall of the outer drying chamber 212. The top surface of the corrugated support plate has a corrugated structure. Multiple support columns are provided on the outer side of the lower part of the inner drying chamber 213. The multiple support columns are slidably connected on the top surface of the corrugated support plate.

[0042] In some embodiments, the drying assembly 22 includes a hot air blower 221, an air inlet pipe 222, and two baffles 223. The air inlet pipe 222 is configured as a three-way pipe. The hot air blower 221 is located on one side outside the drying outer chamber 212. The air outlet of the hot air blower 221 is connected and fixedly connected to one end of the air inlet pipe 222. The other two ends of the air inlet pipe 222 pass through and are fixedly installed at the bottom of the side wall of the drying outer chamber 212. The two baffles 223 are respectively fixedly installed on two openings of the air inlet pipe 222 located inside the drying outer chamber 212.

[0043] In some embodiments, the stirring assembly 23 includes a stirring motor 231, a planetary gear set 232, a rotating shaft 233, a dispersing disk 234, a spiral blade 235, and multiple sets of stirring components. The planetary gear set 232 consists of a sun gear, multiple planetary gears, a fixed plate, and an external gear ring. The stirring motor 231 is fixedly installed on the top outer side of the drying chamber 212, and the fixed plate of the planetary gear set 232 is fixedly installed on the inner top of the drying chamber 212. The output end of the stirring motor 231 rotates through and extends into the interior of the drying chamber 212 and is fixedly connected to the sun gear of the planetary gear set 232. Multiple stirring components are respectively installed at the bottom of multiple planetary gears of planetary gear set 232. The top of rotating shaft 233 is fixedly connected to the sun gear of planetary gear set 232. The bottom of rotating shaft 233 passes through the drying inner chamber 213 and is rotatably connected to the inner bottom wall of drying outer chamber 212. Rotating shaft 233 is rotatably connected to filter screen 214. The top of drying inner chamber 213 is fixedly connected to the outer gear ring of planetary gear set 232. Dispersing disc 234 is fixedly installed on the top of the outer side of rotating shaft 233. Spiral blade 235 is fixedly installed on the bottom of the outer side of rotating shaft 233. Spiral blade 235 is located below filter screen 214.

[0044] Preferably, the stirring assembly 23 further includes a stirring shaft 236 and multiple stirring blades 237. The multiple stirring blades 237 are uniformly fixedly installed on the outside of the stirring shaft 236. The stirring shaft 236 is rotatably disposed inside the drying chamber 213. The circulating feed pipe 216 is fixedly installed on the bottom of the planetary gears of the planetary gear set 232. The dispersing disk 234 is conical in shape, and an arc-shaped baffle is fixedly disposed on the outside of the dispersing disk 234. The bottom of the raw material feed pipe 215 faces the dispersing disk 234. The multiple stirring shafts 236 are arranged in a ring array around the rotating shaft 233.

[0045] In some embodiments, the circulating feeding device 3 includes a circulating conveying pipe 31 and a vacuum conveyor 32. One end of the circulating conveying pipe 31 is fixedly connected to the discharge pipe of the drying outer chamber 212, and the other end of the circulating conveying pipe 31 is provided with a three-way discharge pipe. One outlet of the three-way discharge pipe is fixedly connected to the circulating feed pipe 216, and the other outlet of the three-way discharge pipe is connected to the mixing assembly 41 of multiple sets of feeding injection molding modules. Both outlet ends of the three-way discharge pipe are equipped with control valves to facilitate the opening and closing of the outlet ends. The vacuum conveyor 32 is fixedly installed on the outside of the circulating conveying pipe 31 and is used to drive the conveying of raw materials inside the circulating conveying pipe 31.

[0046] In some embodiments, the mixing assembly 41 includes a mixing support 411, a mixing chamber 412, and a plurality of mixing feed pipes 413. The mixing chamber 412 is fixedly installed on the top of the mixing support 411, and the plurality of mixing feed pipes 413 are fixedly installed on the top of the mixing chamber 412. The bottom of the plurality of mixing feed pipes 413 extends through into the interior of the mixing chamber 412. The top of the plurality of mixing feed pipes 413 is respectively connected to the circulation conveying pipes 31 of the plurality of raw material circulation modules. A control valve is fixedly provided at the bottom of the mixing feed pipes 413. A discharge pipe is fixedly provided at the bottom of the mixing chamber 412. A control valve is provided on the outside of the discharge pipe of the mixing chamber 412. The discharge pipe of the mixing chamber 412 is connected to the injection molding device 5.

[0047] The weighing assembly 42 includes a drive motor 421, a rotating rod 422, a rotating seat 423, a weight sensor 424, and a pulley 425. The drive motor 421 is fixedly installed on the top outer side of the mixing hopper 412. The output end of the drive motor 421 extends through into the interior of the mixing hopper 412 and is fixedly connected to the rotating rod 422. The rotating seat 423 is fixedly installed on the bottom outer side of the rotating rod 422. The weight sensor 424 is fixedly installed on the top of the rotating seat 423. The pulley 425 is rotatably installed on the bottom side of the rotating seat 423 away from the rotating rod 422. The pulley 425 is rolled along the inner wall of the mixing hopper 412. The inner wall of the mixing hopper 412 is fixedly provided with a track that cooperates with the rolling of the pulley 425. The top of the weight sensor 424 is connected to the receiving assembly 43.

[0048] The rotating seat 423 is inclined at one end, and gradually tilts from bottom to top in the opposite direction of rotation. Viewed from the top of the mixing bin 412, the rotating seat 423 rotates clockwise.

[0049] The weighing assembly 42 also includes a lever 426 and two torsion springs 427. The lever 426 is rotatably mounted on the bottom of the rotating rod 422 and is located below the rotating seat 423. The two torsion springs 427 are disposed between the lever 426 and the rotating rod 422, and the two ends of the torsion springs 427 are fixedly connected to the outer wall of the lever 426 and the outer wall of the rotating rod 422, respectively.

[0050] Multiple sets of receiving components 43 are provided, and multiple sets of receiving components 43 are installed inside the mixing hopper 412 corresponding to multiple mixing feed pipes 413. The multiple sets of receiving components 43 are arranged in a ring array around the rotating rod 422. The receiving component 43 includes a receiving frame 431, a receiving cylinder 432, and a baffle 433. The receiving frame 431 is fixedly installed inside the mixing hopper 412. The receiving cylinder 432 is located inside the receiving frame 431 and is slidably connected with a limiting position. A baffle 433 is hinged to one side of the bottom of the receiving cylinder 432. The bottom of the baffle 433 in one set of receiving components 43 can be connected to the weight sensor 424.

[0051] The receiving frame 431 and the receiving cylinder 432 are provided with a slide rail and a slide groove. The slide rail is installed on the inner side wall of the receiving frame 431, and the slide groove is opened on the outer wall of the receiving cylinder 432. The slide rail is slidably connected in the slide groove. A blocking block is fixedly installed at the bottom of the slide rail to prevent the receiving cylinder 432 from detaching from the receiving frame 431. The blocking block contacts the bottom of the receiving cylinder 432.

[0052] In some embodiments, the injection molding device 5 includes an injection molding machine 51 and a feeding pipe 52. One end of the feeding pipe 52 is fixedly connected to the discharge pipe of the mixing chamber 412, and the other end of the feeding pipe 52 is fixedly connected to the feed port of the injection molding machine 51.

[0053] When the multi-material circulating feeding system is in normal use, the hot air blower 221 and the stirring motor 231 are started. The stirring motor 231 drives the planetary gear set 232 to run, which in turn drives the drying chamber 213, the rotating shaft 233, and the stirring shaft 236 to rotate, thereby driving the dispersing disc 234, the spiral blades 235, and the stirring blades 237 to rotate. While the drying chamber 213 rotates, its lower part moves up and down in a wave-like pattern. The drying chamber 213 drives the filter screen 214 to move up and down to prevent raw material blockage. The raw materials in the raw material silo 11 are transported to the material feed pipe 12 and the raw material inlet pipe 215. On the dispersing disc 234, the dispersing disc 234 carries and disperses the raw materials into the drying inner chamber 213. The stirring blades 237 stir the raw materials. The hot air blower 221 delivers hot air through the air inlet pipe 222 to the drying outer chamber 212 and the drying inner chamber 213 to dry the raw materials. The filter screen 214 blocks the raw materials, reduces the passage rate of the raw materials, and increases the contact time and contact area between the raw materials and the hot air. At the same time, the filter screen 214 disperses the raw materials to prevent them from accumulating. The raw materials fall through the filter screen 214 to the inner bottom of the drying outer chamber 212, where the spiral blades 235 further stir and dry the raw materials.

[0054] The dried raw materials are conveyed to the circulating conveying pipe 31 through the discharge pipe below the drying outer chamber 212. The vacuum conveyor 32 is started to convey the raw materials in the circulating conveying pipe 31. The drive motor 421 is started, which drives the rotating rod 422 and the rotating seat 423 to rotate. The rotating seat 423 pushes the baffle 433 to gradually close the bottom opening of the corresponding receiving cylinder 432. When the baffle 433 is completely closed, the baffle 433 gradually moves upward with the rotating seat 423 tilting to one side. The baffle 433 drives the receiving cylinder 432 to slide upward along the receiving frame 431. At this time, the drive motor 421 is turned off, and the weight of the receiving cylinder 432 and the baffle 433 is completely sensed by the weight sensor 424. The control valve of the corresponding mixing feed pipe 413 above is started, and the mixing feed pipe 413 above conveys the raw materials in the circulating conveying pipe 31. The raw materials are fed into the receiving cylinder 432 for weighing. After the weight sensor 424 detects the specified weight, the control valve of the mixing feed pipe 413 is closed. The drive motor 421 is started to drive the rotating seat 423 to continue rotating. When the rotating seat 423 disengages from the baffle 433, the baffle 433 opens, and the raw materials in the receiving cylinder 432 fall to the bottom of the mixing chamber 412. The above steps are repeated to complete the weighing and mixing of multiple raw materials. At the same time, the rotating rod 422 drives the paddle 426 to rotate. The paddle 426 moves the baffle 433 in the open state to make the baffle 433 shake, so as to avoid the raw materials sticking to the baffle 433. The mixed raw materials are transported to the injection molding machine 51 through the feeding pipe 52 for injection molding. The unused raw materials in the circulating conveying pipe 31 return to the bottom of the drying outer chamber 212 through the circulating conveying pipe 31 and the circulating feed pipe 216 to enter the subsequent circulating supply.

[0055] The separation of raw materials by the outer drying chamber 212 and the inner drying chamber 213 ensures the drying effect and improves product quality. The dispersion plate 234 disperses the incoming raw materials around the inner drying chamber 213, preventing accumulation and improving the drying effect. Air is supplied simultaneously from both sides of the outer drying chamber 212 through the air inlet pipe 222, preventing the hot air from being too concentrated and causing some raw materials to overheat while others remain undried. The rotating seat 423 allows the weight sensor 424 to lift the corresponding receiving cylinder 432 for weighing when a specific raw material is required, ensuring accurate measurement. When weighing the next raw material, the previous raw material will automatically fall to the bottom of the mixing chamber 412 for mixing. The paddle 426 and torsion spring 427 allow the open baffle 433 to be moved during weighing, preventing raw materials from sticking together and ensuring the accuracy of raw material weighing.

[0056] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-material circulating feeding system, comprising a raw material circulating module, characterized in that: It also includes a feeding injection molding module. The raw material circulation module and the feeding injection molding module are each provided with multiple sets. The raw material circulation module includes a storage device (1), a drying device (2) and a circulating feeding device (3). The storage device (1), the drying device (2) and the circulating feeding device (3) are connected in sequence. The feeding injection molding module includes a feeding device (4) and an injection device (5). The feeding device (4) and the injection device (5) are connected. The feeding device (4) in each set of feeding injection molding modules is connected to the circulating feeding device (3) in multiple sets of raw material circulation modules. Multiple feeding devices (4) are evenly distributed on the line of the circulating feeding device (3). The circulating feeding device (3) gives priority to feeding the feeding device (4) that is closer. The drying device (2) includes a dual-bin assembly (21) for segmented drying, a drying assembly (22) for heating and dehydration, and a stirring assembly (23) for stirring the raw materials. The inlet and outlet of the dual-bin assembly (21) are connected to the storage device (1) and the circulating feeding device (3) respectively. The drying assembly (22) and the stirring assembly (23) are both connected to the dual-bin assembly (21).

2. The multi-material circulating feeding system according to claim 1, characterized in that, The storage device (1) includes a raw material bin (11) and a conveying pipe (12). One end of the conveying pipe (12) is connected to and fixedly connected to the outlet of the raw material bin (11), and the other end of the conveying pipe (12) is connected to the inlet at the top of the dual-bin assembly (21).

3. The multi-material circulating feeding system according to claim 2, characterized in that, The dual-bin assembly (21) includes a drying support (211), an outer drying chamber (212), an inner drying chamber (213), a filter screen (214), and a raw material feed pipe (215). The outer drying chamber (212) is fixedly installed on the top of the drying support (211). The inner drying chamber (213) is rotatably installed inside the outer drying chamber (212). The filter screen (214) is fixedly installed at the bottom of the inner drying chamber (213). The raw material feed pipe (215) is fixedly installed at the feed inlet at the top of the outer drying chamber (212). The bottom of the raw material feed pipe (215) extends into the inner drying chamber (213). One end of the circulating feed pipe (216) is connected to the outer drying chamber. The bottom of (212) is connected and fixedly connected. The drying outer chamber (212) is connected to the drying component (22) and the stirring component (23). The drying inner chamber (213) is connected to the stirring component (23). The filter screen (214) is connected to the stirring component (23). The top of the raw material feed pipe (215) is connected and fixedly connected to the other end of the conveying pipe (12). The other end of the circulating feed pipe (216) is connected to the circulating feeding device (3). The bottom of the drying outer chamber (212) is fixedly provided with a discharge pipe. A control valve is provided on the outside of the discharge pipe of the drying outer chamber (212). The discharge pipe of the drying outer chamber (212) is connected to the circulating feeding device (3).

4. The multi-material circulating feeding system according to claim 3, characterized in that, The drying assembly (22) includes a hot air blower (221), an air inlet pipe (222), and two baffles (223). The air inlet pipe (222) is configured as a three-way pipe. The hot air blower (221) is located on one side outside the drying outer chamber (212). The air outlet of the hot air blower (221) is connected and fixedly connected to one end of the air inlet pipe (222). The other two ends of the air inlet pipe (222) pass through and are fixedly installed at the bottom of the side wall of the drying outer chamber (212). The two baffles (223) are respectively fixedly installed on the two openings of the air inlet pipe (222) inside the drying outer chamber (212).

5. The multi-material circulating feeding system according to claim 3, characterized in that, The stirring assembly (23) includes a stirring motor (231), a planetary gear set (232), a rotating shaft (233), a dispersing disc (234), a spiral blade (235), and multiple stirring components. The planetary gear set (232) consists of a sun gear, multiple planetary gears, a fixed plate, and an external gear ring. The stirring motor (231) is fixedly installed on the top outer side of the drying chamber (212). The fixed plate of the planetary gear set (232) is fixedly installed on the top inner side of the drying chamber (212). The output end of the stirring motor (231) rotates through and extends into the interior of the drying chamber (212) and is fixedly connected to the sun gear of the planetary gear set (232). Multiple stirring components... The components are respectively installed at the bottom of multiple planetary gears of the planetary gear set (232). The top of the rotating shaft (233) is fixedly connected to the sun gear of the planetary gear set (232). The bottom of the rotating shaft (233) passes through the drying inner chamber (213) and is rotatably connected to the bottom wall of the drying outer chamber (212). The rotating shaft (233) is rotatably connected to the filter screen (214). The top of the drying inner chamber (213) is fixedly connected to the outer gear ring of the planetary gear set (232). The dispersion disc (234) is fixedly installed on the top of the outer side of the rotating shaft (233). The spiral blade (235) is fixedly installed on the bottom of the outer side of the rotating shaft (233). The spiral blade (235) is located below the filter screen (214).

6. The multi-material circulating feeding system according to claim 5, characterized in that, The stirring assembly (23) also includes a stirring shaft (236) and multiple stirring blades (237). The multiple stirring blades (237) are evenly fixedly installed on the outside of the stirring shaft (236). The stirring shaft (236) is rotatably installed inside the drying chamber (213). The top of the circulating feed pipe (216) is fixedly installed on the bottom of the planetary gear of the planetary gear set (232). The dispersing disk (234) is conical. An arc-shaped baffle is fixedly installed on the outside of the dispersing disk (234). The bottom of the raw material feed pipe (215) faces the dispersing disk (234).

7. The multi-material circulating feeding system according to claim 3, characterized in that, The circulating feeding device (3) includes a circulating conveying pipe (31) and a vacuum conveyor (32). One end of the circulating conveying pipe (31) is connected to the discharge pipe of the drying outer chamber (212) and fixedly connected. The other end of the circulating conveying pipe (31) is provided with a three-way discharge pipe. One outlet of the three-way discharge pipe is connected to the circulating feed pipe (216) and fixedly connected. The other outlet of the three-way discharge pipe is connected to the mixing assembly 41 of multiple feeding injection molding modules. The vacuum conveyor (32) is fixedly installed on the outside of the circulating conveying pipe (31) and is used to drive the conveying of raw materials inside the circulating conveying pipe (31).

8. The multi-material circulating feeding system according to claim 7, characterized in that, The injection molding device (5) includes an injection molding machine (51) and a feeding pipe (52). One end of the feeding pipe (52) is connected to the discharge pipe of the feeding device (4) and fixedly connected to the inlet of the injection molding machine (51).

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