A plastic pellet extrusion molding feeding device

Abstract

The utility model discloses a kind of plastic particle extrusion forming feeders, belong to plastic processing equipment technical field, including hopper, material conveying pipe and locking assembly and vibration assembly, vibration assembly is fixed to the outer wall of hopper, and the rotation of eccentric semicircular block is driven by motor to make hopper vibrate, cooperate the sieve net in hopper and force material to descend and carry out screening, locking assembly is used for the quick connection of material conveying pipe and extruder and inlet, it includes the fixed tooth ring fixed in the end of material conveying pipe, the fixed ring and sealing ring rotation clamping are fixed in junction, realize quick lock solid.The utility model, by using the sustained vibration force generated by vibration assembly acts on hopper, solve the problem that plastic particle is easy to adhere or bridge in hopper in prior art, leading to poor discharge, and cannot filter larger size particle, reach the effect of forced material descending, prevent jam and complete online screening simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment technology, and in particular to a plastic particle extrusion molding feeding device. Background Technology

[0002] Plastic particle extrusion molding is a widely used manufacturing process for plastic products. Its core involves heating and melting solid plastic particles, then extruding them through a die. In this process, the feeding device plays a crucial role, and its performance directly determines the stability of the subsequent extrusion process and the quality of the final product.

[0003] Traditional feeding devices typically employ a gravity-feed structure, where plastic particles slide down from an overhead hopper under their own weight and enter the conveying pipe or extruder inlet. This method is simple in structure and effective when handling materials with good flowability.

[0004] However, in actual production, many plastic particles have less than ideal flowability due to irregular shapes, surface electrostatic adsorption, or the influence of environmental humidity. When these poorly flowable particles accumulate in the hopper, the friction and cohesion between the particles can lead to "bridging" or "rat holes." Once "bridging" occurs, the material forms a stable arched structure at the outlet below the hopper, hindering the fall of subsequent particles and causing a feeding interruption. This discontinuity and unevenness in feeding directly causes fluctuations in the extruder's feed rate, severely affecting the pressure and flow stability of the molten material, ultimately leading to quality problems such as dimensional deviations and surface defects in the finished product.

[0005] Therefore, this utility model proposes a plastic particle extrusion molding feeding device to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a plastic particle extrusion molding feeding device, which aims to improve the problems of poor material flow leading to poor feeding or even blockage, and inconvenient disassembly and maintenance of the feeding pipeline in the existing plastic particle extrusion molding feeding device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a plastic particle extrusion molding feeding device, comprising: a base, an extruder, a feed inlet, a support column, a conveying pipe, a hopper, and a screen, and further comprising a locking component and a vibration component. The extruder is fixedly connected to the base, the bottom end of the support column is fixedly connected to the base, and its top end supports and is connected to the feed inlet. The hopper is installed above the feed inlet, and the screen is disposed inside the hopper. The two ends of the conveying pipe are detachably connected to the bottom of the feed inlet and the feed inlet of the extruder respectively through the locking component. The locking assembly includes a fixed toothed ring, and a fixed ring, a sealing ring, and a concave ring fixed at the connection between the extruder and the feed port. The fixed toothed ring is fixed to the end of the feed pipe, and the inner wall of the fixed toothed ring is rotatably engaged with the outer wall of the fixed ring and the sealing ring. The bottom of the fixed toothed ring is accommodated in the concave ring.

[0008] Preferably, the vibration assembly includes a housing, a second motor, a second rotating shaft, and a semi-circular block. The vibration assembly is fixedly connected to the outer wall of the hopper through its housing. The second rotating shaft is housed inside the housing and rotatably connected to the output end of the second motor. The semi-circular block is fixed to the second rotating shaft.

[0009] Preferably, the plastic particle extrusion molding feeding device further includes a first motor, a first rotating shaft, and a paddle. The first motor is fixedly connected to the outside of the feeding pipe, the first rotating shaft is rotatably connected to the inside of the feeding pipe and is drivenly connected to the output end of the first motor, and the paddle is fixedly connected to the outer periphery of the first rotating shaft. Furthermore, a square protrusion is provided at the top of the inlet, and a first groove and a second groove are correspondingly provided at the bottom of the hopper. The hopper is fitted onto the outer wall of the square protrusion through its first groove and second groove.

[0010] Preferably, the inner peripheral wall of the fixing toothed ring is provided with a plurality of fixing teeth, and the inner wall of the fixing teeth is used to abut and clamp with the outer wall of the fixing ring and the sealing ring.

[0011] Preferably, the semicircular block has an eccentric structure, with its center of mass offset from the axis of the second rotating shaft.

[0012] Preferably, the blade is a propeller blade, and its outer diameter is smaller than the inner diameter of the conveying pipe.

[0013] Preferably, the screen is horizontally positioned at the bottom outlet of the hopper.

[0014] Preferably, the sealing ring is coaxially sleeved on the outer periphery of the fixing ring.

[0015] This utility model has the following beneficial effects: 1. In this utility model, by setting a vibration component on the outer wall of the hopper and setting a screen inside it, the continuous vibration force generated by the vibration component acts on the hopper, which solves the problems in the prior art that plastic particles are easy to stick or bridge in the hopper, resulting in poor material discharge and the inability to filter larger particles. It achieves the effect of forcing the material to flow downward, preventing blockage, and completing online screening simultaneously.

[0016] 2. This utility model, by setting a locking component consisting of a fixed toothed ring, a fixed ring and a sealing ring, achieves the connection between the feed pipe and the extruder and the feed port by rotational snap-fit, which solves the problem that the feed pipe usually uses bolt flange connection in the prior art, which is cumbersome and inefficient in disassembly and assembly, and achieves the effect of quick disassembly and assembly, convenient cleaning and maintenance. Attached Figure Description

[0017] Figure 1 This is a perspective view of a plastic particle extrusion molding feeding device proposed in this utility model; Figure 2 This is a schematic cross-sectional view of the hopper of a plastic particle extrusion molding feeding device proposed in this utility model; Figure 3 This is a schematic diagram of the hopper explosion of a plastic particle extrusion molding feeding device proposed in this utility model; Figure 4 This is a schematic cross-sectional view of the feeding pipe of a plastic particle extrusion molding feeding device proposed in this utility model; Figure 5 An exploded view of the locking component of a plastic particle extrusion molding feeding device proposed in this utility model.

[0018] Legend: 1. Hopper; 2. First motor; 3. Support column; 4. Base; 5. Extruder; 6. Locking assembly; 7. Vibration assembly; 8. Screen; 9. Feed inlet; 10. Feed pipe; 11. First groove; 12. Second groove; 13. Square protrusion; 14. First rotating shaft; 15. Paddle; 601. Fixed toothed ring; 602. Fixed ring; 603. Sealing ring; 604. Concave ring; 701. Outer shell; 702. Semicircular block; 703. Second rotating shaft; 704. Second motor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-5 This utility model provides a plastic particle extrusion molding feeding device, which aims to solve the problems in the prior art where plastic particles are prone to blockage during feeding and the feeding pipeline is inconvenient to disassemble and maintain.

[0021] Specifically, the device includes a base 4 and an extruder 5 fixedly connected to the base 4. The base 4 provides a stable foundation for the entire device. The top surface of the base 4 is also fixedly connected to a support column 3 via the bottom end of the support column 3. The top end of the support column 3 supports and connects to a feed inlet 9. A hopper 1 is installed above the feed inlet 9. The hopper 1 is used to hold the plastic particles to be processed. A screen 8 is installed inside the hopper 1 to perform preliminary filtration on the incoming plastic particles. Between the bottom of the feed inlet 9 and the feed inlet of the extruder 5, a conveying pipe 10 is detachably connected via a locking assembly 6. The conveying pipe 10 is used to construct a material conveying channel from the feed inlet 9 to the extruder 5.

[0022] It also includes a locking component 6 and a vibration component 7. The locking component 6 allows the feed pipe 10 to be quickly connected or disconnected from the extruder 5 and the feed inlet 9, facilitating equipment maintenance and cleaning. The locking component 6 includes a fixing toothed ring 601, and a fixing ring 602, a sealing ring 603, and a concave ring 604 respectively fixed at the connection between the extruder 5 and the feed inlet 9. The fixing toothed ring 601 is fixed to both ends of the feed pipe 10 by welding or integral forming. The fixing ring 602 and the concave ring 604 are fixed to the outside of the feed inlet of the extruder 5 and the feed port 9. On the outside of the discharge port of the feed inlet 9, the sealing ring 603 is coaxially sleeved on the outer periphery of the fixing ring 602. During assembly, the fixing toothed ring 601 at the end of the feed pipe 10 is aligned and pushed toward the fixing ring 602, so that the inner wall of the fixing toothed ring 601 contacts the outer wall of the fixing ring 602 and the sealing ring 603. Then, the feed pipe 10 is rotated, and the inner wall of the fixing toothed ring 601 can be rotatably locked onto the outer wall of the fixing ring 602 and the sealing ring 603. At the same time, the bottom of the fixing toothed ring 601 is accommodated in the concave ring 604, thereby achieving a firm and sealed lock.

[0023] The function of the vibration assembly 7 is to provide continuous vibration for the hopper 1 to prevent plastic particles from adhering to or bridging the inner wall of the hopper 1. The vibration assembly 7 includes a housing 701, a second motor 704, a second rotating shaft 703, and a semi-circular block 702. The vibration assembly 7 is fixedly connected to the outer wall of the hopper 1 through the housing 701. The second motor 704 is installed inside the housing 701. The second rotating shaft 703 is housed inside the housing 701 and rotatably connected to the output end of the second motor 704. The semi-circular block 702 is fixed on the second rotating shaft 703. When the second motor 704 is working, it drives the semi-circular block 702 to rotate at high speed around the axis of the second rotating shaft 703. Since the semi-circular block 702 itself is an eccentric structure, its center of mass is offset from the axis of the second rotating shaft 703. Therefore, it generates periodic centrifugal force when rotating. This centrifugal force is directly transmitted to the hopper 1 through the housing 701, causing the hopper 1 to generate high-frequency vibration.

[0024] To achieve stable conveying of plastic particles inside the conveying pipe 10, a first motor 2, a first rotating shaft 14, and a paddle 15 are also included. The first motor 2 is fixedly connected to the outside of the conveying pipe 10 to provide power for the conveying process. The first rotating shaft 14 is rotatably connected to the inside of the conveying pipe 10. One end of the first rotating shaft 14 extends out of the conveying pipe 10 and is connected to the output end of the first motor 2 for transmission. The other end is supported inside the other end of the conveying pipe 10 by a bearing. The paddle 15 is fixedly connected to the outer periphery of the first rotating shaft 14 and is arranged at intervals along the axial direction of the first rotating shaft 14. When the first motor 2 is started, the first rotating shaft 14 drives the paddle 15 to rotate synchronously inside the conveying pipe 10, thereby pushing the plastic particles to move directionally from one end of the feed port 9 to one end of the extruder 5. In this preferred embodiment, the paddle 15 is a propeller blade. The outer diameter of the paddle 15 is smaller than the inner diameter of the conveying pipe 10, ensuring that the paddle 15 will not scrape against the inner wall of the conveying pipe 10 when rotating, while efficiently pushing the granular material forward.

[0025] To achieve stable installation and precise positioning between the hopper 1 and the feed inlet 9, the top of the feed inlet 9 is integrally formed with an upwardly extending square protrusion 13. The outer wall of the square protrusion 13 forms an installation reference surface that mates with the hopper 1. Correspondingly, the bottom of the hopper 1 is provided with a first groove 11 and a second groove 12. The shape and size of the first groove 11 and the second groove 12 match the square protrusion 13. During installation, the hopper 1 is placed from top to bottom so that the first groove 11 and the second groove 12 at the bottom of the hopper 1 are accurately fitted onto the outer wall of the square protrusion 13 at the top of the feed inlet 9. Through this concave-convex fitting structure, the hopper 1 and the feed inlet 9 are quickly aligned and securely fixed.

[0026] The inner circumferential wall of the fixed toothed ring 601 is provided with multiple fixed teeth evenly distributed in the circumferential direction. The inner walls of these fixed teeth form a clamping surface that contacts the outer walls of the fixed ring 602 and the sealing ring 603. When the feed pipe 10 is rotated, the inner walls of the fixed teeth will slide spirally along the outer wall surfaces of the fixed ring 602 and the sealing ring 603, and finally abut and clamp, forming a strong locking force. Compared with pure friction connection, this structure with fixed teeth provides a more reliable mechanical interlock and prevents accidental loosening.

[0027] The special shape of the semicircular block 702 is the key to generating vibration. The semicircular block 702 is a standard semi-cylinder with its straight cut surface passing through the axis of the second rotating shaft 703, or offset parallel to the axis, thereby ensuring that its overall center of mass is significantly deviated from the center of rotation, i.e. the axis of the second rotating shaft 703, so as to generate a sufficiently large excitation force when rotating.

[0028] In the specific arrangement of the screen 8, the screen 8 is horizontally set at the bottom discharge port of the hopper 1. The edge of the screen 8 is fixed to the inner wall of the hopper 1 by means of slots or welding, which completely separates the accommodating space of the hopper 1 from the inlet 9 below. All materials entering the inlet 9 from the hopper 1 must pass through the mesh of the screen 8, thereby effectively intercepting particles or impurities that exceed the size limit.

[0029] The number of support columns 3 can be multiple, such as three or four, evenly distributed on the base 4 to jointly support the feed inlet 9, thereby enhancing the stability of the overall structure. The base 4 is a heavy metal platform that provides a shock-resistant and stable foundation for the entire equipment during operation.

[0030] Working principle: When using the equipment, plastic particles are put into the hopper 1, filtered through the screen 8 and enter the feed port 9. The bottom of the feed port 9 is connected to the conveying pipe 10 through the locking component 6, and the side is connected to the base 4 through the support column 3. The other end of the conveying pipe 10 is also connected to the extruder 5 through the locking component 6. Then the plastic particles enter the inside of the conveying pipe 10. At this time, the first motor 2 drives the first rotating shaft 14 to rotate to control the blade 15 to rotate, and then pushes the plastic particles through the other end to be fed into the extruder 5.

[0031] When plastic particles enter the hopper 1, they first come into contact with the screen 8. Then, the second motor 704 in the vibration assembly 7 drives the second rotating shaft 703 to rotate the semi-circular block 702. Due to the special shape design of the semi-circular block 702, it generates centrifugal force when rotating. The centrifugal force is then transmitted to the hopper 1 through the outer shell 701 to generate vibration, thereby accelerating the passage of plastic particles through the screen 8, avoiding material accumulation, and screening out larger defective particles, thus ensuring the quality of the finished product.

[0032] When assembling the equipment and connecting one end of the feed pipe 10 to the extruder 5, first align the fixing toothed ring 601 at the bottom of the feed pipe 10 with the hole inside the fixing ring 602 and then push it in. Then rotate the feed pipe 10. At this time, the inner wall of the fixing teeth at the bottom of the fixing toothed ring 601 will contact the outer wall of the fixing ring 602 and the sealing ring 603, and the bottom of the fixing teeth at the bottom of the fixing toothed ring 601 will enter the space inside the concave ring 604. As the feed pipe 10 drives the fixing toothed ring 601 to rotate, The fixing teeth at the bottom of the fixing ring 601 will gradually clamp the fixing ring 602 and the sealing ring 603, thereby fixing the conveying pipe 10 and the extruder 5. After the conveying pipe 10 and the extruder 5 are fixed, the inlet 9 is connected to the conveying pipe 10 through the locking component 6. After the connection is completed, the first groove 11 is fitted into the outer wall of the square protrusion 13 at the top of the inlet 9, and then the inner wall of the second groove 12 at the bottom of the hopper 1 is fitted into the outer wall of the square protrusion 13 to complete the assembly of the equipment.

Claims

1. A feeding device for plastic particle extrusion molding, comprising: The base (4), extruder (5), feed inlet (9), support column (3), conveying pipe (10), hopper (1) and screen (8) are characterized in that they also include a locking component (6) and a vibration component (7). The extruder (5) is fixedly connected to the base (4). The bottom end of the support column (3) is fixedly connected to the base (4), and its top end is supported and connected to the feed inlet (9). The hopper (1) is installed above the feed inlet (9). The screen (8) is set inside the hopper (1). The two ends of the conveying pipe (10) are detachably connected to the bottom of the feed inlet (9) and the feed inlet of the extruder (5) respectively through the locking component (6). The locking assembly (6) includes a fixed toothed ring (601), and a fixed ring (602), a sealing ring (603), and a concave ring (604) fixed at the connection between the extruder (5) and the feed port (9). The fixed toothed ring (601) is fixed to the end of the feed pipe (10), and the inner wall of the fixed toothed ring (601) is rotatably engaged with the outer wall of the fixed ring (602) and the sealing ring (603). The bottom of the fixed toothed ring (601) is accommodated in the concave ring (604).

2. The plastic particle extrusion molding feeding device according to claim 1, characterized in that, The vibration assembly (7) includes a housing (701), a second motor (704), a second rotating shaft (703), and a semi-circular block (702). The vibration assembly (7) is fixedly connected to the outer wall of the hopper (1) through its housing (701). The second rotating shaft (703) is housed in the housing (701) and rotatably connected to the output end of the second motor (704). The semi-circular block (702) is fixed on the second rotating shaft (703).

3. The plastic particle extrusion molding feeding device according to claim 1, characterized in that, It also includes a first motor (2), a first rotating shaft (14) and a blade (15). The first motor (2) is fixedly connected to the outside of the conveying pipe (10). The first rotating shaft (14) is rotatably connected to the inside of the conveying pipe (10) and is connected to the output end of the first motor (2). The blade (15) is fixedly connected to the outer periphery of the first rotating shaft (14). The top of the inlet (9) is provided with a square protrusion (13). The bottom of the hopper (1) is provided with a first groove (11) and a second groove (12). The hopper (1) is fitted onto the outer wall of the square protrusion (13) through its first groove (11) and second groove (12).

4. The plastic particle extrusion molding feeding device according to claim 1, characterized in that, The inner circumferential wall of the fixed toothed ring (601) is provided with a plurality of fixed teeth, the inner wall of which is used to abut and clamp against the outer wall of the fixed ring (602) and the sealing ring (603).

5. The plastic particle extrusion molding feeding device according to claim 2, characterized in that, The semicircular block (702) has an eccentric structure, and its center of mass is offset from the axis of the second rotating shaft (703).

6. The plastic particle extrusion molding feeding device according to claim 3, characterized in that, The blade (15) is a propeller blade, and its outer diameter is smaller than the inner diameter of the conveying pipe (10).

7. The plastic particle extrusion molding feeding device according to claim 1, characterized in that, The screen (8) is horizontally positioned at the bottom outlet of the hopper (1).

8. The plastic particle extrusion molding feeding device according to claim 1, characterized in that, The sealing ring (603) is coaxially sleeved on the outer periphery of the fixing ring (602).

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