Injection material dehumidifying, drying and feeding device

Abstract

This utility model provides a dehumidification and drying feeding device for injection molding raw materials, relating to the technical field of injection molding peripheral equipment. It includes: a drying chamber with two feeding cylinders connected to the top; a motor a mounted on the top of the drying chamber; a rotating rod connected to the bottom of motor a; one end of the rotating rod extending into the interior of the drying chamber and connected to multiple stirring rods; a partition at the bottom of the rotating rod; and the outer side of the partition connected to the inner wall of the drying chamber. A drying assembly, located inside the drying chamber, is used to improve the drying efficiency of the material. The drying assembly includes: a left inclined plate, a right inclined plate, and a hot air box. The drying assembly extends the residence time of the material on the left and right inclined plates and increases the contact area between the material and the hot air.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding raw material processing equipment, specifically an injection molding raw material dehumidification, drying and feeding device. Background Technology

[0002] In injection molding, plastic raw materials (such as PA and PC) are highly hygroscopic and require dehumidification and drying to ensure that the injection molded products are bubble-free and meet strength standards. Existing drying and feeding devices have the following core technical defects:

[0003] Firstly, the material does not come into sufficient contact with the hot air. Traditional equipment often uses a single inclined chute or fluidized bed structure, where the material slides down quickly (residence time is only 3-5 seconds) and is prone to clumping, leading to localized accumulation. The actual contact area with the hot air is less than 60% of the theoretical value. This directly results in approximately 15%-20% of the material not being completely dried (moisture content ≥0.2%), leading to an 8%-12% bubble rate in the injection molded product and a 10%-15% decrease in impact strength.

[0004] Secondly, the drying uniformity is poor. Existing equipment typically introduces hot air from one side or the bottom, making it difficult for materials to tumble and disperse during transport. The moisture content deviation within the same batch of raw materials can reach 0.15%-0.2% (the acceptable deviation should be ≤0.05%). This is especially problematic for mixed raw materials with significant particle size differences, where fine particles are easily carried away by the airflow, while coarse particles are insufficiently dried, further exacerbating the uniformity problem.

[0005] Third, the drying and feeding processes are disconnected. In traditional equipment, the drying unit and the feeding unit are mostly independent structures. When the material falls from the drying chamber into the feeding mechanism, it is easy to absorb moisture again (when the ambient humidity is ≥60%, the moisture absorption rate reaches 0.05%-0.1% / min). Moreover, the material is prone to clumping again due to compression during the feeding process, requiring an additional dispersing structure, which increases the complexity of the equipment and energy consumption (20%-30% higher than the integrated structure).

[0006] In addition, although some improved devices have attempted to add a stirring structure, the stirring blades are prone to causing wear on the raw materials (wear rate ≥3%), and cannot solve the problem of "wall adhesion and retention" during inclined conveying (the proportion of residual material on the wall is 5%-8%), resulting in local overheating or insufficient drying.

[0007] Therefore, in response to the pain points of existing technologies such as "short residence time, small contact area, poor drying uniformity, and unreasonable feeding connection", there is an urgent need for an injection molding raw material processing device that can extend the material drying time, enhance hot air contact, and achieve integrated drying and feeding through structural design. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide a dehumidification and drying feeding device for injection molding raw materials, which can extend the residence time of the material on the left and right inclined plates and increase the contact area between the material and the hot air through the drying components.

[0009] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0010] A dehumidification and drying feeding device for injection molding raw materials includes: a drying chamber, two feeding cylinders connected to the top of the drying chamber, a motor a installed on the top of the drying chamber, a rotating rod connected to the bottom of the motor a, one end of the rotating rod extending into the interior of the drying chamber and connected to multiple stirring rods, a partition plate provided at the bottom of the rotating rod, the outer side of the partition plate being connected to the inner wall of the drying chamber, and a drying assembly disposed inside the drying chamber for improving the drying efficiency of the material, the drying assembly including: a left inclined plate, a right inclined plate, and a hot air box.

[0011] Preferably, the partition has a discharge port inside, and the bottom of the partition has a left inclined plate and a right inclined plate. Multiple dampers are installed at the bottom of both the left and right inclined plates. One side of each damper is connected to the inner wall of the drying chamber. Multiple semi-circular protrusions are installed on the surface of both the left and right inclined plates. A cam is installed at the bottom of both the left and right inclined plates. A sprocket a and a sprocket b are installed on one side of the drying chamber. Matching chains are installed on the outer sides of sprocket a and sprocket b. A rotating rod is connected to one side of each sprocket a and sprocket b. One end of each rotating rod passes through a corresponding cam and protrudes from the outer surface of the drying chamber. The outer side of each rotating rod is connected to the cam. A motor b is installed on one side of the drying chamber, and one side of motor b is driven by the corresponding rotating rod via a drive shaft.

[0012] Preferably, a discharge trough is provided on one side of the drying box, and a receiving frame is installed on one side of the drying box. The receiving frame has a receiving trough inside that communicates with the discharge trough. A motor c is installed on one side of the receiving frame, and an auger is provided inside the receiving trough. One side of the motor c is driven by the auger through a drive shaft, and a feeding cylinder communicating with the receiving trough is connected to one side of the receiving frame.

[0013] Preferably, a hot air frame is installed on one side of the drying chamber, and multiple air delivery slots are opened on one side of the hot air frame. Hot air holes corresponding to the multiple air delivery slots are opened on one side of the drying chamber. Each of the multiple hot air holes is provided with a breathable mesh. A hot air pipe is connected to one side of the hot air frame. A connecting plate is installed on one side of the drying chamber, and a hot air box is installed on one side of the connecting plate. One end of the hot air pipe extends into the interior of the hot air box. A filter plate is installed at the bottom of the hot air box. Two fixing blocks are installed inside the hot air box. A motor d is installed between the two fixing blocks. A rotating seat is driven and connected to the top of the motor d. Multiple fan blades are connected to the outside of the rotating seat, and multiple electric heating tubes are installed on the top of the multiple fan blades.

[0014] The beneficial effects of this utility model are:

[0015] The advantage of this invention is that by using the left inclined plate, the right inclined plate and the hot air box in the drying assembly, the material sliding time can be extended by the semi-circular protrusions on the left and right inclined plates, and the contact area between the material and the hot air can be increased by the periodic impact of the cam on the left and right inclined plates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a front sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a half-sectional view of the overall structure of this utility model.

[0019] Figure 4 This is a half-sectional view of the left inclined plate structure of this utility model.

[0020] Figure 5 For the present utility model Figure 2 Enlarged view of point A.

[0021] Figures 1-5In the middle section: 1. Drying oven; 101. Feed cylinder; 102. Motor a; 103. Rotating rod; 104. Stirring rod; 105. Baffle plate; 2. Discharge port; 201. Left inclined plate; 202. Right inclined plate; 3. Damper; 301. Semi-circular convex strip; 302. Cam; 303. Rotating rod; 4. Sprocket a; 401. Sprocket b; 402. Chain; 403. Motor b; 5. Discharge port 501. Trough; 502. Trough; 503. Motor c; 504. Screwdriver; 505. Feeding cylinder; 6. Hot air frame; 601. Air delivery trough; 602. Hot air hole; 603. Hot air pipe; 7. Connecting plate; 701. Hot air box; 702. Filter plate; 703. Fixing block; 704. Motor d; 705. Rotary seat; 706. Fan blade; 707. Electric heating tube. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-5 As shown, a dehumidification and drying feeding device for injection molding raw materials includes a drying chamber 1. Two feed cylinders 101 are connected to the top of the drying chamber 1. A motor a102 is installed on the top of the drying chamber 1. A rotating rod 103 is connected to the bottom of the motor a102. One end of the rotating rod 103 extends into the interior of the drying chamber 1 and is connected to multiple stirring rods 104. A partition 105 is provided at the bottom of the rotating rod 103. The outer side of the partition 105 is connected to the inner wall of the drying chamber 1. A drying assembly is installed inside the drying chamber 1 to improve the drying efficiency of the material. The drying assembly includes a left inclined plate 201, a right inclined plate 202, and a hot air box 701.

[0025] The left inclined plate 201, right inclined plate 202 and hot air box 701 in the drying assembly can extend the material's sliding time by using the semi-circular protrusions 301 on the left inclined plate 201 and right inclined plate 202, and increase the contact area between the material and the hot air by using the periodic impact of the cam 302 on the left inclined plate 201 and right inclined plate 202.

[0026] The partition 105 has a discharge port 2 inside. A left inclined plate 201 and a right inclined plate 202 are located at the bottom of the partition 105. Multiple dampers 3 are installed at the bottom of both the left and right inclined plates 201 and 202. One side of each damper 3 is connected to the inner wall of the drying chamber 1. Multiple semi-circular protrusions 301 are installed on the surface of both the left and right inclined plates 201 and 202. A cam 302 is located at the bottom of both the left and right inclined plates 201 and 202. A sprocket is located on one side of the drying chamber 1. A4 and sprocket B401 are provided with matching chains 402 on their outer sides. A rotating rod 303 is connected to one side of both sprockets A4 and B401. One end of each rotating rod 303 passes through a corresponding cam 302 and protrudes from the outer surface of the drying chamber 1. The outer side of the rotating rod 303 is connected to the cam 302. A motor B403 is installed on one side of the drying chamber 1. The motor B403 is driven by the corresponding rotating rod 303 through a drive shaft.

[0027] Material falls into the drying chamber 1 from two feed cylinders 101. Motor a102 drives the rotating rod 103 to rotate the stirring rod 104, initially breaking up and stirring the material to prevent clumping. The broken-up material falls through the discharge port 2 in the center of the partition 105 onto the top of the left inclined plate 201, and then slides onto the right inclined plate 202. During this process, the densely arranged semi-circular ridges 301 on the surfaces of the left and right inclined plates 201 and 202 increase the resistance to the material's descent, effectively slowing down its sliding speed and prolonging the material's residence time on the inclined plates. At the same time, motor b403 drives the stirring rod 104 on one side via the drive shaft. Rotating rod 303 rotates, and this rotating rod 303 drives the rotating rod 303 on the other side synchronously through sprocket a4, sprocket b401 and chain 402, so that the cams 302 on the two rotating rods 303 rotate synchronously, thereby periodically impacting the bottom of the left inclined plate 201 and the right inclined plate 202 upward. Under the buffering and reset action of multiple dampers 3 at the bottom, the two inclined plates generate continuous, small-amplitude vibrations. This vibration causes the material on the inclined plates to be constantly thrown up, rolled and redistributed, thereby greatly increasing the exposed surface area and looseness of the material particles and increasing the contact area with hot air.

[0028] The drying chamber 1 has a hot air frame 6 installed on one side, and multiple air delivery slots 601 are opened on one side of the hot air frame 6. Hot air holes 602 corresponding to the multiple air delivery slots 601 are opened on one side of the drying chamber 1. Each of the multiple hot air holes 602 is equipped with a breathable mesh. A hot air pipe 603 is connected to one side of the hot air frame 6. A connecting plate 7 is installed on one side of the drying chamber 1. A hot air box 701 is installed on one side of the connecting plate 7. One end of the hot air pipe 603 extends into the hot air box 701. A filter plate 702 is installed at the bottom of the hot air box 701. Two fixing blocks 703 are installed inside the hot air box 701. A motor d704 is installed between the two fixing blocks 703. A rotating seat 705 is driven and connected to the top of the motor d704. Multiple fan blades 706 are connected to the outside of the rotating seat 705. Multiple electric heating tubes 707 are installed on the top of the multiple fan blades 706.

[0029] After the material enters the equipment, the motor d704 drives the rotating seat 705 to rotate multiple fan blades 706 at high speed. The air flows through multiple electric heating tubes 707 installed on the top of the fan blades 706 and is quickly heated into high-temperature dry air. The heated air flows upward and is delivered through the hot air pipe 603 to the hot air frame 6 attached to the side wall of the drying chamber 1. The hot air frame 6 delivers the hot air to the corresponding hot air holes 602 on the side wall of the drying chamber 1 through multiple air delivery slots 601 opened on the side wall. The hot air holes 602 are equipped with breathable mesh to prevent the material from entering the hot air holes 602. The hot air from the hot air holes 602 blows into the equipment and, together with the cam 302 striking the inclined plate, enables the hot air to come into efficient contact with the surface of the material particles.

[0030] The drying chamber 1 has a discharge chute 5 on one side and a receiving frame 501 on the other side. The receiving frame 501 has a receiving chute 502 that communicates with the discharge chute 5. A motor c503 is installed on one side of the receiving frame 501. An auger 504 is installed inside the receiving chute 502. The motor c503 is connected to the auger 504 via a drive shaft. A feeding cylinder 505 that communicates with the receiving chute 502 is connected to one side of the receiving frame 501.

[0031] The dried material, after being thoroughly vibrated and dried by the left inclined plate 201 and the right inclined plate 202 and finally sliding down, collects at the bottom of the drying chamber 1. The discharge chute 5 opened on the side wall of the drying chamber 1 allows the material to flow out of the drying chamber. The material falls into the receiving chute 502 of the receiving frame 501 below through the discharge chute 5. The auger 504 located inside the receiving chute 502 is driven to rotate by the motor c503 installed on one side of the receiving frame 501. The rotating auger blades push the dried material that has fallen into the bottom of the receiving chute 502 forward along the axial direction of the trough. When the material is conveyed to the position where the feeding cylinder 505 communicates with the receiving chute 502, it is conveyed to the next processing step through the inclined feeding cylinder 505.

[0032] Working principle:

[0033] Material falls into the drying chamber 1 from two feed cylinders 101. Motor a102 drives the rotating rod 103 to rotate the stirring rod 104, initially breaking up and stirring the material to prevent clumping. The broken-up material falls through the discharge port 2 in the center of the partition 105 onto the top of the left inclined plate 201, and then slides onto the right inclined plate 202. During this process, the densely arranged semi-circular ridges 301 on the surfaces of the left and right inclined plates 201 and 202 increase the resistance to the material's descent, effectively slowing down its sliding speed and prolonging the material's residence time on the inclined plates. At the same time, motor b403 drives the stirring rod 104 on one side via the drive shaft. Rotating rod 303 rotates, and this rotating rod 303 drives the rotating rod 303 on the other side synchronously through sprocket a4, sprocket b401 and chain 402, so that the cams 302 on the two rotating rods 303 rotate synchronously, thereby periodically impacting the bottom of the left inclined plate 201 and the right inclined plate 202 upward. Under the buffering and reset action of multiple dampers 3 at the bottom, the two inclined plates generate continuous, small-amplitude vibrations. This vibration causes the material on the inclined plates to be constantly thrown up, rolled and redistributed, thereby greatly increasing the exposed surface area and looseness of the material particles and increasing the contact area with hot air.

[0034] After the material enters the equipment, the motor d704 drives the rotating seat 705 to rotate multiple fan blades 706 at high speed. The air flows through multiple electric heating tubes 707 installed on the top of the fan blades 706 and is quickly heated into high-temperature dry air. The heated air flows upward and is delivered through the hot air pipe 603 to the hot air frame 6 attached to the side wall of the drying chamber 1. The hot air frame 6 delivers the hot air to the corresponding hot air holes 602 on the side wall of the drying chamber 1 through multiple air delivery slots 601 opened on the side wall. The hot air holes 602 are equipped with breathable mesh to prevent the material from entering the hot air holes 602. The hot air from the hot air holes 602 blows into the equipment and, together with the cam 302 striking the inclined plate, enables the hot air to come into efficient contact with the surface of the material particles.

[0035] The dried material, after being thoroughly vibrated and dried by the left inclined plate 201 and the right inclined plate 202 and finally sliding down, collects at the bottom of the drying chamber 1. The discharge chute 5 opened on the side wall of the drying chamber 1 allows the material to flow out of the drying chamber. The material falls into the receiving chute 502 of the receiving frame 501 below through the discharge chute 5. The auger 504 located inside the receiving chute 502 is driven to rotate by the motor c503 installed on one side of the receiving frame 501. The rotating auger blades push the dried material that has fallen into the bottom of the receiving chute 502 forward along the axial direction of the trough. When the material is conveyed to the position where the feeding cylinder 505 communicates with the receiving chute 502, it is conveyed to the next processing step through the inclined feeding cylinder 505.

[0036] In addition, all electrical components mentioned in the article are electrically connected to the main controller and power supply. The main controller can be a conventional known device such as a computer that performs control, and the existing publicly available power connection technology will not be described in detail in the article.

[0037] The above provides a detailed description of the injection molding raw material dehumidification and drying feeding device provided in the embodiments of this application. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solution and core idea of ​​this application. 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. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A dehumidification and drying feeding device for injection molding raw materials, characterized in that, include: A drying oven (1) is provided with two feed cylinders (101) connected to the top of the drying oven (1). A motor a (102) is installed on the top of the drying oven (1). A rotating rod (103) is connected to the bottom of the motor a (102). One end of the rotating rod (103) extends into the interior of the drying oven (1) and is connected to multiple stirring rods (104). A partition (105) is provided at the bottom of the rotating rod (103). The outer side of the partition (105) is connected to the inner wall of the drying oven (1). The drying components installed inside the drying chamber (1) are used to improve the drying efficiency of the material. The drying components include: a left inclined plate (201), a right inclined plate (202), and a hot air box (701).

2. The injection molding raw material dehumidification and drying feeding device according to claim 1, characterized in that, The partition (105) has a discharge port (2) inside, and the bottom of the partition (105) is provided with a left inclined plate (201) and a right inclined plate (202).

3. The injection molding raw material dehumidification and drying feeding device according to claim 2, characterized in that, Multiple dampers (3) are installed at the bottom of the left inclined plate (201) and the right inclined plate (202). One side of the damper (3) is connected to the inner wall of the drying box (1). Multiple semi-circular protrusions (301) are installed on the surface of the left inclined plate (201) and the right inclined plate (202). Cams (302) are provided at the bottom of the left inclined plate (201) and the right inclined plate (202).

4. The injection molding raw material dehumidification and drying feeding device according to claim 3, characterized in that, The drying chamber (1) is provided with a sprocket a (4) and a sprocket b (401) on one side. A matching chain (402) is provided on the outer side of the sprocket a (4) and the sprocket b (401). A rotating rod (303) is connected to one side of the sprocket a (4) and the sprocket b (401). One end of each of the two rotating rods (303) passes through the corresponding cam (302) and protrudes from the outer surface of the drying chamber (1). The outer side of the rotating rod (303) is connected to the cam (302). A motor b (403) is installed on one side of the drying chamber (1). One side of the motor b (403) is driven by the corresponding rotating rod (303) through a drive shaft.

5. The injection molding raw material dehumidification and drying feeding device according to claim 1, characterized in that, The drying box (1) has a discharge chute (5) on one side and a receiving frame (501) on one side. The receiving frame (501) has a receiving chute (502) inside that communicates with the discharge chute (5). A motor c (503) is installed on one side of the receiving frame (501). An auger (504) is installed inside the receiving chute (502). The motor c (503) is connected to the auger (504) on one side via a drive shaft. A feeding cylinder (505) is connected to the receiving chute (502) on one side of the receiving frame (501).

6. The injection molding raw material dehumidification and drying feeding device according to claim 1, characterized in that, A hot air frame (6) is installed on one side of the drying box (1). A plurality of air delivery slots (601) are opened on one side of the hot air frame (6). A hot air hole (602) corresponding to the plurality of air delivery slots (601) is opened on one side of the drying box (1). A breathable mesh is provided inside the plurality of hot air holes (602). A hot air pipe (603) is connected to one side of the hot air frame (6).

7. The injection molding raw material dehumidification and drying feeding device according to claim 6, characterized in that, A connecting plate (7) is installed on one side of the drying box (1), and a hot air box (701) is installed on one side of the connecting plate (7). One end of the hot air pipe (603) extends into the interior of the hot air box (701). A filter plate (702) is installed at the bottom of the hot air box (701). Two fixing blocks (703) are installed inside the hot air box (701). A motor d (704) is installed between the two fixing blocks (703). A rotating seat (705) is driven and connected to the top of the motor d (704). Multiple fan blades (706) are connected to the outside of the rotating seat (705). Multiple electric heating tubes (707) are installed on the top of the multiple fan blades (706).

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