Feeding equipment for cable sheath extrusion molding

Abstract

The cable sheath extrusion molding feeding equipment comprises a mounting seat, a rack, a mixing tank, a cover body, a feeding pipe, a driving motor and the like, the rack is arranged on the upper portion of the mounting seat, the mixing tank is arranged on the upper portion in the rack, the mixing tank is integrally in a big-end-up cone shape, the cover body is arranged on the top of the mixing tank in a closed mode, and the feeding pipe is arranged on the cover body. The bottom of the cover body is connected and communicated with a discharging pipe, at least one feeding pipe is arranged on the cover body and communicated with the internal space of the mixing tank, and a driving motor is arranged at the top of the cover body. Through the mixing tank and the storage hopper, particle raw materials can be premixed in the feeding stage, the storage hopper receives the premixed raw materials discharged by the mixing tank and temporarily stores the premixed raw materials, and meanwhile, the premixed raw materials are orderly conveyed from the mixing tank to the storage hopper and then to an external plastic extruding machine in cooperation with the material passing valve set, the conveying pipe, the spiral conveying piece and the like in the discharging pipe; and the problem of material breakage caused by traditional manual mixed material transfer is effectively avoided, and the continuous extrusion molding process is guaranteed.

Description

A feeding device for cable sheath extrusion Technical Field

[0001] This utility model relates to a feeding device, and more particularly to a feeding device for extruding cable sheaths. Background Technology

[0002] In the extrusion process of cable sheaths, granular raw materials (such as PE and PVC) need to be melted and extruded into cable sheaths. The uniformity and continuous supply of the raw materials directly affect the molding quality and production efficiency of the sheaths. To ensure stable sheath performance, the granular raw materials must first be premixed to fully integrate different components or batches of raw materials, and then the mixed raw materials are stably fed to the extruder to complete the extrusion process. Therefore, the premixing treatment and continuous feeding of granular raw materials are key links to ensure the processing quality of cable sheaths and improve production continuity.

[0003] Premixing of granular raw materials and extrusion feeding are often two separate workstations: multi-component materials are first mixed by a mixing device, and after mixing, the raw materials are manually transferred to the extruder's feed hopper. The extruder then relies on its own feeding mechanism to transport the raw materials. Although this can achieve basic raw material mixing and feeding functions, it has significant shortcomings in large-scale, continuous production. On the one hand, the connection between independent mixing equipment and manual transfer can easily lead to feeding interruptions. After the mixing equipment completes the mixing of a batch of raw materials, it needs to be manually transferred to the extruder hopper in a timely manner. If the transfer is not timely or the amount transferred at one time is insufficient, it will cause the extruder hopper to run out of material, forcing the extrusion process to stop. This not only reduces production efficiency but may also cause temperature fluctuations in the melt system due to the extruder running idle, affecting the stability of the sheath molding. On the other hand, during manual transfer, the raw materials are easily affected by the external environment (such as the introduction of impurities or absorption of moisture), and the uniformity of the mixed raw materials may be affected by vibration and accumulation during the transfer process, resulting in uneven raw material composition entering the extruder. Ultimately, this affects the physical properties of the cable sheath. At the same time, manual transfer requires continuous manpower, increasing the labor costs of production. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the objective is to provide a feeding device for extruding cable sheaths.

[0005] The technical solution of this utility model is as follows: a feeding device for cable sheath extrusion, comprising a mounting base, a frame, a mixing tank, a cover, a feed pipe, a drive motor, a connecting seat, a stirring motor, a stirring paddle, a storage hopper, a conveying pipe, and a screw conveyor. The mounting base has a frame on top, and a mixing tank is located in the upper part of the frame. The mixing tank is generally conical in shape, wider at the top and narrower at the bottom. A cover is closed at the top, and a discharge pipe is connected to the bottom of the cover. At least one feed pipe is provided on the cover, communicating with the internal space of the mixing tank. A drive motor is located at the top of the cover, and the output shaft of the drive motor extends into the upper part of the mixing tank. A connecting seat is fixed on the output shaft, and the end of the connecting seat... The system is equipped with a stirring motor, and a stirring paddle is mounted on the output shaft of the stirring motor. The lower part of the stirring paddle extends into the lower part of the mixing tank. A material passage valve assembly is installed in the discharge pipe. A storage hopper is fixed in the mounting base. The internal space of the storage hopper is connected to the discharge pipe. The storage hopper is generally square-shaped cone with a larger top and a smaller bottom. A conveying pipe is horizontally connected to the lower part of the storage hopper. A spiral conveyor is installed on the conveying pipe. The spiral conveyor consists of a spiral conveying strip arranged along the length of the conveying pipe and a drive motor. The output shaft of the drive motor is connected to one end of the spiral conveying strip. The drive motor drives the spiral conveying strip to rotate inside the conveying pipe. The end of the conveying pipe is connected to the feed end of an external extruder.

[0006] As a preferred technical solution of this utility model, the feed valve assembly includes a support rod, a cylinder, a conical block, and a telescopic sleeve. The upper part of the discharge pipe of the mixing tank is a cone-shaped section of varying sizes. Multiple support rods are fixed inside the discharge pipe, and a cylinder is vertically arranged between the support rods. The cylinder and the discharge pipe are concentric. A conical block is provided at the top of the movable rod of the cylinder. The conical block is located inside the conical section of the discharge pipe. A telescopic sleeve is provided between the upper part of the cylinder and the bottom of the conical block. An annular ring is provided at the connection between the conical block and the telescopic sleeve. When the movable rod of the cylinder is fully retracted, the annular ring contacts the inner wall of the discharge pipe. At this time, the annular ring and the conical block divide the internal space of the discharge pipe into two spaces distributed vertically.

[0007] As a preferred technical solution of this utility model, it also includes a spring, and the moving rod of the cylinder is elastically connected to the conical block through the spring.

[0008] As a preferred technical solution of this utility model, the connecting seat and the stirring motor are inclined as a whole, and the stirring paddle connected to the stirring motor is inclined at the same angle as the inner wall of the mixing tank. When the stirring paddle rotates, it will rotate and contact the inner wall of the mixing tank.

[0009] As a preferred technical solution of this utility model, it also includes a rotating shaft and a rake frame. Two rotating shafts are rotatably mounted inside the storage hopper. Multiple rake frames are spirally arranged on each rotating shaft along the axial direction. A power component is connected to one end of each rotating shaft, and the rotating shaft connected to it is driven to rotate inside the storage hopper by the power component.

[0010] As a preferred technical solution of this utility model, the two rotating shafts are respectively mounted on the upper and lower sides inside the storage hopper, and the two rotating shafts are arranged in a cross pattern.

[0011] Beneficial effects: 1. This utility model uses a mixing tank and a storage hopper to premix granular raw materials during the feeding stage. The storage hopper receives and temporarily stores the premixed raw materials discharged from the mixing tank. At the same time, in conjunction with the material valve group, conveying pipe and screw conveyor in the discharge pipe, the premixed raw materials are transferred in an orderly manner from the mixing tank to the storage hopper and then to the external extruder. This effectively avoids the material interruption problem caused by traditional manual transfer of mixed materials. During processing, it can continuously supply uniform raw materials to the extruder, ensuring the continuous operation of the extrusion process.

[0012] 2. This utility model uses two rotating shafts with rake frames installed inside the storage hopper to turn over and sort the granular raw materials temporarily stored in the storage hopper. This effectively prevents the raw materials from bridging and clumping due to accumulation, avoids blockage at the connection between the lower part of the storage hopper and the conveying pipe, ensures that the raw materials can smoothly enter the conveying pipe, ensures that the feeding channel is unobstructed, and further improves the operational stability of the feeding equipment. Attached Figure Description

[0013] Figure 1 is a three-dimensional structural diagram of this utility model.

[0014] Figure 2 is a planar sectional view of the mixing tank and stirring component of this utility model.

[0015] Figure 3 is a three-dimensional structural diagram of the material storage hopper and rake frame of this utility model.

[0016] Figure 4 is a three-dimensional structural diagram of the feed valve assembly of this utility model.

[0017] The components are: 1-mounting base, 2-frame, 3-mixing tank, 4-cover, 41-feed pipe, 42-drive motor, 43-connecting base, 44-mixing motor, 45-mixing paddle, 5-support rod, 51-cylinder, 52-conical block, 53-telescopic sleeve, 531-spring, 6-storage hopper, 61-conveying pipe, 62-screw conveyor, 63-rotating shaft, 631-rake frame. Detailed Implementation

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0019] Example 1

[0020] A feeding device for cable sheath extrusion, as shown in Figures 1-3, includes a mounting base 1, a frame 2, a mixing tank 3, a cover 4, a feed pipe 41, a drive motor 42, a connecting seat 43, a stirring motor 44, a stirring paddle 45, a storage hopper 6, a conveying pipe 61, and a screw conveyor 62. The frame 2 is fixedly mounted on the upper part of the mounting base. The mixing tank 3 is bolted to the upper part of the frame 2. The mixing tank 3 is generally conical in shape, wider at the top and narrower at the bottom. The top of the mixing tank 3 is sealed with a cover 4 via a flange. A sealing gasket is provided between the cover 4 and the mixing tank 3 to ensure internal airtightness. The bottom of the mixing tank 3... The cover body 4 has a discharge pipe that communicates with the interior of the mixing tank 3. Multiple feed pipes 41 are installed through the cover body 4, the number of which is appropriately determined based on the type of raw material. One end of each feed pipe 41 extends into the interior space of the mixing tank 3, allowing for connection to external raw material conveying pipes to supply material into the mixing tank 3. A drive motor 42 is fixedly mounted on the top of the cover body 4 via a motor mount. The output shaft of the drive motor 42 passes vertically downwards through the cover body 4 and extends into the upper part of the mixing tank 3. A sealed bearing is provided between the output shaft and the cover body 4, and a connecting seat 43 is fixedly connected to the end of the output shaft via a key. A stirring motor 44 is bolted to the end of the mounting base 43. The output shaft of the stirring motor 44 is vertically downward and connected to a stirring paddle 45 via a coupling. The lower part of the stirring paddle 45 extends into the lower part of the mixing tank 3 to near the inlet of the discharge pipe. A feed valve assembly is installed in the discharge pipe to control the discharge flow. A storage hopper 6 is fixed to the mounting base 1 by a bracket. The top opening of the storage hopper 6 is connected to the lower outlet of the discharge pipe. The storage hopper 6 is a square cone shape, wider at the top and narrower at the bottom, to guide the raw materials to converge at the bottom. A conveying pipe 61 is horizontally welded to and connected to one side of the lower part of the storage hopper 6. The upper part is equipped with a screw conveyor 62, which consists of a screw conveyor bar arranged along the length of the inside of the conveying pipe 61 and a drive motor. The drive motor is fixed to the outside of one end of the conveying pipe 61 by a motor frame. Its output shaft passes through the end wall of the conveying pipe 61 and is connected to one end of the screw conveyor bar by a coupling. The drive motor drives the screw conveyor bar to rotate inside the conveying pipe 61, which can push the raw material falling into the conveying pipe 61 from the storage hopper 6 to the end. The end of the conveying pipe 61 is connected to the feed end of the external extruder through a flange, so as to realize the stable conveying of raw materials to the extruder.

[0021] As shown in Figures 2 and 4, the feed valve assembly includes support rods 5, cylinders 51, conical blocks 52, and telescopic sleeves 53. The upper inner wall of the discharge pipe of the mixing tank 3 is machined with a conical section that is smaller at the top and larger at the bottom. Multiple support rods 5 are evenly fixed circumferentially inside the discharge pipe. One end of each support rod 5 protrudes from the inner wall of the discharge pipe and is fixedly connected to the outer wall. The support rods 5 are hollow, allowing for the installation of control cables or air supply lines to connect to the cylinders 51. A cylinder 51 is vertically fixed at the center of the support rods 5. The cylinder body of the cylinder 51 is fixedly connected to the inner side of the support rods 5, ensuring that the cylinder 51 and the discharge pipe are concentric. The movable rod of the cylinder 51 extends vertically upwards, and its top is bolted to a conical block 52. The taper of the conical block 52 matches the conical section of the discharge pipe and is located within the conical section. A telescopic sleeve 53 is fitted between the upper part of the cylinder body of the cylinder 51 and the bottom of the conical block 52. One end is fixedly connected to the top of the cylinder 51, and the other end is fixedly connected to the bottom of the conical block 52. It can extend and retract with the rise and fall of the conical block 52, which serves to shield the moving rod of the cylinder 51 and prevent the raw material from sticking. The outer circumference of the connection between the conical block 52 and the telescopic sleeve 53 is integrally formed with an annular ring made of elastic material. When the moving rod of the cylinder 51 is fully retracted, the conical block 52 fits against the inner wall of the conical part of the discharge pipe, and at the same time, the annular ring is in close contact with the inner wall of the discharge pipe. At this time, the annular ring and the conical block 52 together divide the internal space of the discharge pipe into two independent spaces distributed vertically, realizing the sealing and closure of the discharge pipe. When the moving rod of the cylinder 51 extends, the conical block 52 moves upward and separates from the inner wall of the conical part to form a gap. The annular ring disengages from the inner wall of the discharge pipe, and the raw material can be discharged downward from the gap to the storage hopper 6. By controlling the extension and retraction of the moving rod of the cylinder 51, the size of the gap can be adjusted to control the discharge speed.

[0022] As shown in Figure 4, it also includes a spring 531. The top of the movable rod of the cylinder 51 is elastically connected to the bottom of the conical block 52 through the spring 531. When the conical block 52 contacts the conical part of the discharge pipe or the raw material particles are large, the spring 531 can provide buffering to avoid damage caused by rigid collision between the conical block 52 and the discharge pipe. At the same time, it can keep the annular ring in close contact with the inner wall of the discharge pipe to improve the sealing effect.

[0023] As shown in Figure 2, the connecting seat 43 and the stirring motor 44 are inclined as a whole, and their inclination angle is the same as that of the inner wall of the mixing tank 3. The stirring paddle 45 connected to the stirring motor 44 is also inclined, so that the outer edge of the stirring paddle 45 maintains a uniform gap with the inner wall of the mixing tank 3. When the drive motor 42 starts, its output shaft drives the connecting seat 43, the stirring motor 44 and the stirring paddle 45 to revolve around the central axis of the mixing tank 3. At the same time, the stirring motor 44 starts and drives the stirring paddle 45 to rotate, forming a compound stirring action of rotation and revolution. This can stir the raw materials in the mixing tank 3 in all directions and improve the mixing uniformity. When the stirring paddle 45 rotates, its outer edge will rotate and contact the inner wall of the mixing tank 3, which can scrape off the material adhering to the inner wall and avoid the raw material residue clumping, which will affect the mixing effect.

[0024] During processing, granular raw materials are fed into the mixing tank 3 through multiple feed pipes 41 connected to different material supply components. The drive motor 42 and stirring motor 44 are started, causing the stirring paddle 45 to rotate while revolving around the central axis, thoroughly mixing the raw materials and scraping off the material adhering to the inner wall of the mixing tank 3. After mixing, the operator controls the cylinder 51 of the feed valve assembly to extend the movable rod upward, causing the conical block 52 and the annular ring to disengage from the discharge pipe. The mixed raw materials fall into the storage hopper 6 through the discharge pipe for temporary storage. Then, the drive motor of the screw conveyor 62 is started, and the screw conveyor continuously and stably pushes the raw materials in the storage hopper 6 along the conveying pipe 61 to the feed end of the external extruder through the screw conveyor strip, realizing continuous feeding. When the raw materials in the mixing tank 3 are unloaded... After the material is fed, the control cylinder 51 drives the conical block 52 to reset, and the next batch of granular raw materials is fed into the mixing tank 3 through the feed pipe 41. The drive motor 42 and the stirring motor 44 continue to work, driving the stirring paddle 45 to mix the newly added raw materials. At the same time, the cylinder 51 of the feed valve group remains in the retracted state, and the conical block 52 and the annular ring seal the discharge pipe to ensure that the new raw materials are fully mixed in the mixing tank 3. When the raw material in the storage hopper 6 drops to a certain value, the control cylinder 51 extends again to discharge the new batch of mixed raw materials into the storage hopper 6. This cycle is repeated to achieve continuous operation of mixing, unloading and remixing, which not only ensures the uniformity of raw material mixing, but also avoids the problem of material interruption, and significantly improves the overall production efficiency.

[0025] Example 2

[0026] Based on Embodiment 1, as shown in Figures 1 and 3, it further includes a rotating shaft 63 and a rake frame 631. Two rotating shafts 63 are rotatably mounted inside the storage hopper 6, and the two rotating shafts 63 are rotatably mounted inside the storage hopper 6 via bearings. The two rotating shafts 63 are horizontally mounted on the upper and lower sides inside the storage hopper 6, respectively. The two rotating shafts 63 distributed vertically are arranged in a cross pattern, which can cover and comb the raw materials at different heights and in different areas inside the storage hopper 6. Each rotating shaft 63 has multiple rake frames 631 spirally arranged along its own axial direction. The rake frames 631 are integrally formed with the rotating shaft 63 or fixedly connected by bolts. The spacing between adjacent rake frames 631 is consistent. The spiral arrangement structure can drive the raw materials to move slightly along the axial direction when the rotating shaft 63 rotates, avoiding local accumulation of raw materials. One end of the rotating shaft 63 passes through the bearing on the side wall of the storage hopper 6 and extends to the outside of the storage hopper 6. The end of each rotating shaft 63 extending out of the storage hopper 6 is connected to an independent The power component (such as a servo motor) is connected to the output shaft. The power component is fixed to the outer wall of the storage hopper 6 via a motor frame and can independently control the start, stop, and speed of the corresponding rotating shaft 63. During operation, the power component drives the rotating shaft 63 to rotate the rake frame 631 inside the storage hopper 6. The upper and lower cross-shaped rotating shaft 63 and the rake frame 631 work together to not only turn over the granular raw materials temporarily stored in the storage hopper 6 in all directions, breaking up the "bridging" structure that the raw materials may form, but also guide the raw materials to the inlet of the conveying pipe 61 at the bottom of the storage hopper 6 through the spirally arranged rake frame 631, ensuring that the raw materials fall smoothly into the conveying pipe 61 and avoid feeding interruption due to raw material blockage. At the same time, the operator can control the speed of the two power components and adjust the turning frequency of the rake frame 631 according to the amount of raw materials in the storage hopper 6. When there is more raw materials, the speed is increased to enhance the combing effect, and when there is less raw materials, the speed is reduced to reduce energy consumption, further improving the flexibility and stability of equipment operation.

[0027] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A feeding device for extruding cable sheaths, comprising a mounting base (1) and a frame (2), wherein the frame (2) is provided on the upper part of the mounting base, characterized in that: It also includes a mixing tank (3), a cover (4), a feed pipe (41), a drive motor (42), a connecting seat (43), a stirring motor (44), a stirring paddle (45), a storage hopper (6), a conveying pipe (61), and a screw conveyor (62). The upper part of the frame (2) is equipped with a mixing tank (3). The mixing tank (3) is a cone shape with a larger top and a smaller bottom. The top is closed with a cover (4), and the bottom is connected to and connected to a discharge pipe. The cover (4) is equipped with at least one feed pipe (41), which is connected to the internal space of the mixing tank (3). The top of the cover (4) is equipped with a drive motor (42). The output shaft of the drive motor (42) extends into the upper part of the mixing tank (3). A connecting seat (43) is fixed on the output shaft. The end of the connecting seat (43) is equipped with a stirring motor (44). A stirring paddle (45) is provided on the output shaft of the stirring motor (44). The lower part of the stirring paddle (45) extends into the lower part of the mixing tank (3). A material valve group is provided in the discharge pipe. A storage hopper (6) is fixed in the mounting base (1). The internal space of the storage hopper (6) is connected to the discharge pipe. The storage hopper (6) is a square cone shape with a larger upper part and a smaller lower part. The lower part of the storage hopper (6) is horizontally connected to and connected to the conveying pipe (61). A spiral conveyor (62) is provided on the conveying pipe (61). The spiral conveyor (62) consists of a spiral conveying strip arranged along the internal length direction of the conveying pipe (61) and a drive motor. The output shaft of the drive motor is connected to one end of the spiral conveying strip. The drive motor drives the spiral conveying strip to rotate in the conveying pipe (61). The end of the conveying pipe (61) is connected to the feed end of the external extruder.

2. The feeding equipment for cable sheath extrusion as described in claim 1, characterized in that: The feed valve assembly includes a support rod (5), a cylinder (51), a conical block (52), and a telescopic sleeve (53). The upper part of the discharge pipe of the mixing tank (3) is a cone-shaped part of a certain size. Multiple support rods (5) are fixed inside the discharge pipe. A cylinder (51) is vertically arranged between the support rods (5). The cylinder (51) and the discharge pipe are concentric. A conical block (52) is provided at the top of the movable rod of the cylinder (51). The conical block (52) is located inside the conical part of the discharge pipe. A telescopic sleeve (53) is provided between the upper part of the cylinder (51) and the bottom of the conical block (52). An annular ring is provided at the connection between the conical block (52) and the telescopic sleeve (53). When the movable rod of the cylinder (51) is fully retracted, the annular ring contacts the inner wall of the discharge pipe. At this time, the annular ring and the conical block (52) divide the internal space of the discharge pipe into two spaces distributed vertically.

3. The feeding equipment for cable sheath extrusion as described in claim 2, characterized in that: It also includes a spring (531), and the movable rod of the cylinder (51) is elastically connected to the conical block (52) through the spring (531).

4. The feeding equipment for cable sheath extrusion as described in claim 3, characterized in that: The connecting seat (43) and the stirring motor (44) are inclined as a whole. The stirring paddle (45) connected to the stirring motor (44) is inclined at the same angle as the inner wall of the mixing tank (3). When the stirring paddle (45) rotates, it will rotate and contact the inner wall of the mixing tank (3).

5. The feeding equipment for cable sheath extrusion as described in claim 4, characterized in that: It also includes a rotating shaft (63) and a rake frame (631). Two rotating shafts (63) are mounted in the storage hopper (6). Multiple rake frames (631) are spirally arranged on the rotating shafts (63) along the axial direction. A power component is connected to one end of each rotating shaft (63), and the rotating shaft (63) connected to it is driven to rotate in the storage hopper (6) by the power component.

6. The feeding equipment for cable sheath extrusion as described in claim 5, characterized in that: Two rotating shafts (63) are respectively installed on the upper and lower sides inside the storage hopper (6), and the two rotating shafts (63) are arranged in a cross shape.

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