A feeding device for a screw extruder

Abstract

The utility model provides a kind of feeding device of screw extruder, including support frame and its top feeding groove, support brush cylinder with bristle is horizontally rotationally arranged in feeding groove. The support brush cylinder is provided with bristle on its periphery; the bristles of the support brush cylinder are divided into long-bristle area and short-bristle area along the axial direction of the support brush cylinder, and the long-bristle area and the short-bristle area are alternately arranged. The height difference between long and short bristles is used to limit the wire blank, which can effectively prevent mutual adhesion, winding and fracture during conveying, and improve the stability of the feeding process.

Description

Technical Field

[0001] This utility model relates to the technical field of screw extruder supporting equipment, specifically to a feeding device for a screw extruder. Background Technology

[0002] Screw extruders are commonly used equipment in polymer processing, widely applied in the molding and modification of various plastics. In a typical process, molten material is forcibly conveyed and plasticized by the screw, then extruded through a die to form a continuous linear preform. The linear preform undergoes rapid water cooling to ensure cross-sectional shape stability before proceeding to subsequent processing such as granulation. Throughout this process, the feeding device supports and guides the linear preform.

[0003] Traditional feeding devices include a support frame. To reduce sliding friction, support rods are installed on the support frame, and a traction mechanism is located at the end of the support frame. The traction mechanism drives one end of the linear billet to flow on the surface of the support rod. Due to the thermal sensitivity and surface viscosity of polymer materials, multiple linear billets are prone to sticking together or even tangling on the contact side of the support rod. This phenomenon can cause the linear billets to break, thus affecting production. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a feeding device for a screw extruder, thereby improving the technical problem that the linear billet on the support rod of the existing feeding device is prone to breakage.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A feeding device for a screw extruder includes a support frame with a feeding trough at the top. A support brush cylinder is laterally rotatably arranged inside the feeding trough. The outer periphery of the support brush cylinder is covered with bristles. The support brush cylinder is divided into a long bristle area and a short bristle area, which are alternately arranged along the axial direction of the support brush cylinder. The wire rod blank is arranged in the short bristle area and limited by the height difference between the long bristle area and the short bristle area.

[0006] As a preferred technical solution, multiple support brush cylinders are arranged in the feeding groove, and the multiple support brush cylinders are arranged in an alternating manner. The wire blank is wrapped around the outer wall of one support brush cylinder along the tangential direction of the support brush cylinder to the outer wall of another adjacent support brush cylinder.

[0007] As a preferred technical solution, the support brush cylinder is connected to an air pump through the feeding trough. The support brush cylinder has densely arranged air holes in the short brush area. The air pump pumps air into the support brush cylinder, so that the wire blank has a floating amount in the short brush area that does not exceed the height difference between the long brush area and the short brush area.

[0008] As a preferred technical solution, a connecting cylinder is provided between the feeding trough and the supporting brush cylinder. The connecting cylinder passes through the feeding trough and cooperates with it through a step. The connecting cylinder and the feeding trough are detachably fixed by bolts.

[0009] As a preferred technical solution, a bearing is sleeved on the outer periphery of one end of the connecting cylinder near the supporting brush cylinder, the inner wall of the bearing is fixed to the connecting cylinder, and the outer wall of the bearing is interference-fitted with the inner wall of the supporting brush cylinder.

[0010] As a preferred technical solution, the support frame is inclined upward along the feeding direction.

[0011] As a preferred technical solution, a protective cover is provided on the outer wall of the feeding trough extending upward.

[0012] As a preferred technical solution, the inner side of the protective cover is provided with a hook-shaped locking block, the end of the locking block is closed, the protective cover is provided with a sliding window, and the outer edge of the sliding window is slidably disposed on the inner side of the locking block.

[0013] As a preferred technical solution, the inner side of the card block is provided with a card slot, and the outer periphery of the sliding window is embedded with an elastic ball that adapts to the card slot. A set of card slots is provided in both the closed and open states of the sliding window.

[0014] As a preferred technical solution, the sliding window is provided with a handle.

[0015] The advantages and beneficial effects of this invention are as follows: By setting an alternating arrangement of long and short bristle areas on the support brush cylinder, the lateral displacement and mutual adhesion of the linear billet during the conveying process are effectively limited, reducing the risk of breakage caused by entanglement and clumping of the wire billet. By pumping air into the support brush cylinder using an air pump, the billet has a controllable amount of floating within the short bristle area, further reducing friction and adhesion, and improving the stability and continuity of the conveying process.

[0016] Furthermore, the device employs a staggered arrangement of multiple brush cylinders, an inclined support frame, and a detachable connection structure, optimizing the wire guide path and facilitating maintenance and cleaning. A protective cover and sliding window allow for easy observation and adjustment of the internal operating status. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is one of the cross-sectional structural schematic diagrams of this utility model; Figure 3 This is the second cross-sectional structural schematic diagram of this utility model; Figure label: 1-Support frame, 2-Feeding trough, 3-Support brush cylinder, 4-Long bristle area, 5-Short bristle area, 6-Air pump, 7-Air hole, 8-Connecting cylinder, 9-Step, 10-Bolt, 11-Bearing, 12-Protective cover, 13-Clocking block, 14-Sliding window, 15-Clocking groove, 16-Elastic ball, 17-Handle. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0019] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly or implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] To address the issues of wire rod sticking, tangling, and breakage during the feeding process of screw extruders, this invention provides a feeding device for a screw extruder, comprising a support frame 1 with a feeding trough 2 at its top. A support brush cylinder 3 is laterally rotatable inside the feeding trough 2. The support brush cylinder 3 is covered with bristles, which are axially divided into a long bristle area 4 and a short bristle area 5, alternating between the two. The wire rod is placed in the short bristle area 5, and the height difference between the long bristle area 4 and the short bristle area 5 limits its movement. When the support brush cylinder 3 rotates, the bristles drive the wire rod forward. The long bristle area 4 acts as a barrier and separator, preventing the wire rod from moving laterally or sticking together, thereby improving the stability and continuity of the feeding process and reducing the risk of breakage.

[0022] To further optimize the wire conveying path and avoid accumulation, the technical solution provided in this embodiment includes: multiple support brush cylinders 3 are arranged in a staggered manner within the feeding trough 2. The wire blank is wound tangentially from the outer wall of one support brush cylinder 3 to the outer wall of an adjacent support brush cylinder 3. This arrangement allows the wire to be conveyed in an S-shape, increasing the contact area while dispersing the force, reducing the possibility of single-point friction and entanglement, and improving conveying efficiency and reliability. At the same time, the staggered arrangement of the support brush cylinders 3 also makes it less likely for the wire blank to detach from the support brush cylinders in the vertical direction.

[0023] To control the floating amount of the wire in the short bristle zone 5 and reduce adhesion, the technical solution provided in this embodiment includes: a supporting brush cylinder 3 passing through the feeding trough 2 and connected to an air pump 6; the supporting brush cylinder 3 having densely packed air holes 7 in the area of ​​the short bristle zone 5. The air pump 6 pumps air into the supporting brush cylinder 3, and the airflow overflows from the air holes 7, causing the wire blank to float slightly in the short bristle zone 5, with the floating amount not exceeding the height difference between the long bristle zone 4 and the short bristle zone 5. The airflow reduces the direct contact between the wire and the bristles, preventing surface adhesion, while maintaining stable wire feeding within a limited range, and also blowing away water droplets adhering to the wire blank from the cooling device.

[0024] To facilitate the installation and maintenance of the support brush cylinder 3, the technical solution provided in this embodiment includes: a connecting cylinder 8 is provided between the feeding trough 2 and the support brush cylinder 3. The connecting cylinder 8 passes through the feeding trough 2 and engages with it via a step 9. The connecting cylinder 8 and the feeding trough 2 are detachably fixed by bolts 10. This structure allows the support brush cylinder 3 to be independently disassembled and installed, facilitating replacement or cleaning. The connecting cylinder 8 provides stable support and centering, ensuring smooth rotation of the brush cylinder.

[0025] To ensure the flexible rotation and reliable installation of the support brush cylinder 3, the technical solution provided in this embodiment includes: a bearing 11 is sleeved on the outer periphery of one end of the connecting cylinder 8 near the support brush cylinder 3; the inner ring of the bearing 11 is fixed to the connecting cylinder 8; and the outer ring of the bearing 11 is interference-fitted with the inner sidewall of the support brush cylinder 3. The bearing 11 reduces rotational friction, allowing the support brush cylinder 3 to operate smoothly when driving the wire.

[0026] In order to utilize gravity to achieve drainage, the technical solution provided in this embodiment includes: the support frame 1 is inclined upward along the feeding direction.

[0027] To facilitate observation and operation of the internal condition of the feeding trough 2, the technical solution provided in this embodiment includes: a protective cover 12 extending upward from the outer wall of the feeding trough 2; a hook-shaped locking block 13 on the inner side of the protective cover 12; the end of the locking block 13 being closed; and a sliding window 14 provided on the protective cover 12, with the outer edge of the sliding window 14 slidably positioned inside the locking block 13. The sliding window 14 can be opened or closed by sliding along the locking block 13, facilitating easy viewing of the internal operating status or adjustment. The protective cover 12 serves as a dustproof and safety protection unit.

[0028] To ensure the sliding window 14 is stably positioned and operates smoothly, the technical solution provided in this embodiment includes: a slot 15 is provided on the inner side of the locking block 13, and an elastic ball 16 adapted to the slot 15 is embedded on the outer periphery of the sliding window 14. A set of slots 15 is provided for both the closed and open states of the sliding window 14. When the sliding window 14 slides to the corresponding position, the elastic ball 16 engages with the slot 15, providing clear tactile feedback and position locking, preventing accidental sliding, and improving operational convenience and reliability.

[0029] To facilitate the opening and closing of the sliding window 14, the technical solution provided in this embodiment includes: a handle 17 is provided on the sliding window 14. The handle 17 provides a force application point, allowing the user to easily push and pull the window 14 to open or close, facilitating daily maintenance and adjustment.

[0030] The working principle of this invention is as follows: the wire blank is drawn from the upstream equipment and pulled by the downstream equipment, first being guided onto the support brush cylinder 3 in the feeding trough 2, and then falling into the short bristle area 5. The support brush cylinder 3 rotates as the wire blank moves. During this process, the long bristle areas 4 on both sides form a physical barrier for each wire blank, effectively preventing the wire from deviating from the predetermined track or tangling. At the same time, the air pump 6 continuously supplies air into the support brush cylinder 3, and the airflow overflows evenly from the dense air holes 7 in the short bristle area 5, forming an air cushion at the bottom of the wire, causing it to float slightly, thereby significantly reducing the frictional resistance and surface adhesion between the wire and the bristles. Multiple support brush cylinders 3 arranged vertically and vertically together constitute the conveying path, ultimately achieving stable, continuous, and efficient conveying of the wire to the next process, reducing or avoiding problems of material breakage and tangling.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A feeding device for a screw extruder, comprising a support frame (1), characterized in that: The support frame (1) is provided with a feeding groove (2) at the top. A support brush cylinder (3) is provided on the inner side of the feeding groove (2) in a horizontal rotation. The support brush cylinder (3) is provided with bristles on its outer periphery. The bristles of the support brush cylinder (3) are divided into a long bristle area (4) and a short bristle area (5) along its axial direction. The long bristle area (4) and the short bristle area (5) are alternately arranged.

2. The feeding device for the screw extruder according to claim 1, characterized in that: Multiple support brush cylinders (3) are provided in the feeding groove (2), and the multiple support brush cylinders (3) are arranged in an alternating manner.

3. The feeding device for a screw extruder according to claim 1 or 2, characterized in that: The support brush cylinder (3) passes through the feeding groove (2) and is connected to the air pump (6). The support brush cylinder (3) has densely packed air holes (7) in the area of ​​the short bristle area (5).

4. The feeding device for the screw extruder according to claim 3, characterized in that: A connecting cylinder (8) is provided between the feeding trough (2) and the supporting brush cylinder (3). The connecting cylinder (8) passes through the feeding trough (2) and cooperates with it through a step (9). The connecting cylinder (8) and the feeding trough (2) are detachably fixed by bolts (10).

5. The feeding device for the screw extruder according to claim 4, characterized in that: A bearing (11) is fitted around one end of the connecting cylinder (8) near the supporting brush cylinder (3). The inner ring of the bearing (11) is fixed to the connecting cylinder (8), and the outer ring of the bearing (11) is interference-fitted with the inner wall of the supporting brush cylinder (3).

6. The feeding device for the screw extruder according to claim 1, characterized in that: The support frame (1) is inclined upward along the feeding direction.

7. The feeding device for the screw extruder according to claim 1, characterized in that: The outer wall of the feeding trough (2) is provided with a protective cover (12) extending upward.

8. The feeding device for the screw extruder according to claim 7, characterized in that: The protective cover (12) is provided with a hook-shaped locking block (13) on the inner side, and the end of the locking block (13) is closed; the protective cover (12) is provided with a sliding window (14), and the outer edge of the sliding window (14) is slidably disposed on the inner side of the locking block (13).

9. The feeding device for a screw extruder according to claim 8, characterized in that: The inner side of the card block (13) is provided with a card slot (15), and the outer periphery of the sliding window (14) is provided with an elastic ball (16) adapted to the card slot (15). The card slot (15) is provided in a set corresponding to the closed and open states of the sliding window (14).

10. The feeding device for a screw extruder according to claim 9, characterized in that: The sliding window is equipped with a handle (17).

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