A feeding device for a twin-screw extruder

Abstract

This utility model discloses a feeding device for a twin-screw extruder in the field of chemical fibers. It includes a horizontally arranged casing, within which two parallel extrusion screws are rotatably mounted at the same height. A feeding cylinder is located on the upper side of the casing and is connected to the interior of the casing. The feeding cylinder includes an upper cylinder and a lower cylinder. The upper cylinder includes four corresponding upper side plates, with the cross-sectional area decreasing from top to bottom in the horizontal direction. The lower cylinder includes four lower side plates forming a rectangle. A mounting hole is horizontally opened through the right lower side plate. A material control baffle passes through the mounting hole and extends into the lower cylinder. The rectangular material control baffle is horizontally arranged, with its front and rear sides respectively abutting against the inner walls of the front and rear lower side plates of the lower cylinder. This utility model can prevent large-diameter chemical fiber raw materials from escaping, allowing the chemical fiber raw materials to circulate and be extruded back and forth within the twin-screw extruder, ensuring normal feeding of the raw materials.

Description

Technical Field

[0001] This utility model belongs to the field of chemical fiber, and specifically relates to a feeding device for a twin-screw extruder. Background Technology

[0002] Twin-screw extruders are required in the production of synthetic fibers. A twin-screw extruder consists of a drive unit, feeding unit, barrel, and screws. Two parallel screws are installed in the barrel of a twin-screw extruder, and the two screws work simultaneously, resulting in higher efficiency and better extrusion stability. In existing technology, the screw channels of the 75D twin-screw extruder are small. Due to the uneven particle size of the synthetic fiber raw materials, the screws cannot feed normally. The current solution is to crush the raw materials before feeding them. However, this has the problem that the crushing process generates a lot of dust, polluting the environment, making cleaning difficult, posing a health risk to workers, and increasing their workload. Utility Model Content

[0003] The purpose of this invention is to provide a feeding device for a twin-screw extruder, which can prevent large-diameter chemical fiber raw materials from escaping through a material control baffle, so that the chemical fiber raw materials can be circulated and squeezed back and forth in the twin-screw extruder to ensure normal feeding of raw materials.

[0004] The purpose of this utility model is achieved as follows: A feeding device for a twin-screw extruder includes a horizontally arranged housing. Two parallel extrusion screws are rotatably arranged inside the housing, and the two extrusion screws are arranged at the same height. A feeding cylinder is arranged on the upper side of the housing and is connected to the interior of the housing. The feeding cylinder includes an upper cylinder and a lower cylinder. The upper cylinder includes four corresponding upper side plates, and the cross-sectional area of ​​the upper cylinder decreases from top to bottom in the horizontal direction. The lower cylinder includes four lower side plates forming a rectangle. A mounting hole is horizontally opened through the right lower side plate. A material control baffle passes through the mounting hole and extends into the lower cylinder. The rectangular material control baffle is horizontally arranged, and the front and rear sides of the material control baffle are respectively arranged to abut against the inner walls of the front and rear lower side plates of the lower cylinder.

[0005] In operation, the feeder delivers the chemical fiber raw material (foamed material) into the feed cylinder. The material falls into the casing, where two extrusion screws compress it. A baffle prevents materials with a diameter greater than 14mm from escaping, ensuring the material is continuously compressed within the casing by the twin screws, guaranteeing proper feeding. Compared to existing technologies, this invention offers several advantages: it allows the chemical fiber raw material to circulate and be compressed within the twin-screw extruder via the baffle, ensuring normal feeding; and it eliminates the need for additional crushing of larger diameter materials, significantly reducing manufacturing costs and saving approximately 15,000 yuan per month in maintenance and electricity expenses.

[0006] As a further improvement of this utility model, guide components are provided on the inner walls of both the front and rear lower side plates. Each guide component includes two guide strips corresponding to the upper and lower sides of the material control baffle, with the outer sides of the guide strips being arc-shaped. This facilitates the adjustment of the position of the material control baffle and provides support for it.

[0007] As a further improvement of this utility model, a screw jack is horizontally arranged on the housing corresponding to the material control baffle, and the drive end of the screw jack is connected to the material control baffle for transmission. The screw drive end of the screw jack drives the material control baffle to move left and right to adjust its position to accommodate materials of different diameters. It can block raw materials of different diameters and the screw jack is self-locking and has good stability.

[0008] As a further improvement of this utility model, longitudinal mounting plates are provided on both the front and rear sides of the lower cylinder, and transverse guide rods are provided on the mounting plates. Longitudinal side limiting plates are provided on both the front and rear sides of the material control baffle. Each side limiting plate has a guide hole corresponding to the guide rod, and the guide rod passes through the corresponding guide hole. A spring is sleeved on the outer periphery of the guide rod, and the left and right ends of the spring elastically abut against the corresponding mounting plate and the side limiting plate, respectively. An anti-detachment baffle is provided at the end of the guide rod, located on the other side of the side limiting plate. When the material control baffle moves, the guide rod passes through the side limiting plate to guide the movement of the material control baffle.

[0009] As a further improvement of this utility model, fixing plates are provided on both the upper and lower right sides of the material control baffle. The fixing plates are attached to the outside of the lower side plate and are fixed to the corresponding lower side plate by several fasteners. In this technical solution, the material control baffle is fixed to the feed cylinder by fastening bolts. The lateral length of the material control baffle extending into the lower cylinder is one-third to one-half of the distance between the left and right lower side plates of the lower cylinder.

[0010] As a further improvement of this utility model, a feeder is provided corresponding to the top of the feed cylinder. The feeder delivers the chemical fiber raw materials into the feed cylinder. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a top view of the feed cylinder.

[0013] Figure 3 This is a vertical sectional view of the feed cylinder.

[0014] Figure 4 This is a longitudinal sectional view of the material control baffle.

[0015] Figure 5 This is a cross-sectional view of the material control baffle along the horizontal plane.

[0016] Figure 6 This is a schematic diagram of another structure of the material control baffle of the feed cylinder.

[0017] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0018] The components include: 1. Housing; 2. Extrusion screw; 3. Feed cylinder; 301 upper cylinder; 301a upper side plate; 302 lower cylinder; 302a lower side plate; 4. Mounting hole; 5. Material control baffle; 6. Guide strip; 7. Screw jack; 8. Mounting plate; 9. Guide rod; 10. Side limit plate; 11. Guide hole; 12. Spring; 13. Anti-detachment baffle; 14. Fixing plate; 15. Fastener; and 16. Feeder. Detailed Implementation Example 1

[0019] like Figure 1-5 As shown, a feeding device for a twin-screw extruder includes a horizontally arranged housing 1. Two parallel extrusion screws 2 are rotatably arranged inside the housing 1, and the two extrusion screws 2 are arranged at the same height. A feeding cylinder 3 is arranged on the upper side of the housing 1 and is connected to the interior of the housing 1. The feeding cylinder 3 includes an upper cylinder 301 and a lower cylinder 302. The upper cylinder 301 includes four corresponding upper side plates 301a. The cross-sectional area of ​​the upper cylinder 301 decreases from top to bottom in the horizontal direction. The lower cylinder 302 includes four lower side plates 302a arranged in a rectangle. A mounting hole 4 is opened horizontally through the right lower side plate 302a. A material control baffle 5 passes through the mounting hole 4 and extends into the lower cylinder 302. The rectangular material control baffle 5 is arranged horizontally, and the front and rear sides of the material control baffle 5 are respectively arranged to abut against the inner walls of the front and rear lower side plates 302a of the lower cylinder 302.

[0020] The inner walls of both the front and rear lower side plates 302a are equipped with guide components. The guide components include two guide strips 6 corresponding to the upper and lower sides of the material control baffle 5, respectively. The outer sides of the guide strips 6 are arc-shaped. This facilitates the adjustment of the position of the material control baffle 5 and provides support for the material control baffle 5.

[0021] A screw jack 7 is horizontally arranged on the housing 1 corresponding to the material control baffle 5. The drive end of the screw jack 7 is connected to the material control baffle 5. The screw drive end of the screw jack 7 drives the material control baffle 5 to move left and right to adjust its position to accommodate materials of different diameters. It can block raw materials of different diameters. The screw jack 7 is self-locking and has good stability. Longitudinal mounting plates 8 are arranged on both the front and rear sides of the lower cylinder 302. The mounting plates 8 are provided with transverse guide rods 9. Longitudinal side limiting plates 10 are arranged on both the front and rear sides of the material control baffle 5. Each side limiting plate 10 has a guide hole 11 corresponding to the guide rod 9. The guide rod 9 is fitted through the corresponding guide hole 11. A spring 12 is sleeved on the outer periphery of the guide rod 9. The left and right ends of the spring 12 elastically abut against the corresponding mounting plate 8 and the side limiting plate 10, respectively. An anti-detachment baffle 13 is provided at the end of the guide rod 9. The anti-detachment baffle 13 is located on the other side of the side limiting plate 10. When the material control baffle 5 moves, the guide rod 9 passes through the side limiting plate 10 to guide the movement of the material control baffle 5.

[0022] A feeder 16 is provided corresponding to the top of the feed cylinder 3. The feeder 16 feeds the chemical fiber raw materials into the feed cylinder 3.

[0023] In operation, the feeder 16 delivers the chemical fiber raw material (foamed material) into the feed cylinder 3. The material falls into the casing 1 within the feed cylinder 3. Two extrusion screws 2 inside the casing 1 extrude the chemical fiber raw material. A baffle 5 prevents materials with a diameter greater than 14mm from escaping, ensuring the material is continuously circulated and extruded within the casing 1 by the twin screws, guaranteeing normal feeding. The advantages of this invention are: the baffle 5 allows the chemical fiber raw material to circulate and be extruded within the twin screw extruder, ensuring normal feeding; and the improved design eliminates the need for additional crushing of larger diameter materials, significantly reducing manufacturing costs and saving approximately 15,000 yuan per month in maintenance and electricity expenses. Example 2

[0024] like Figure 6 and 7 As shown, the difference from Embodiment 1 is that: fixing plates 14 are provided on both the upper and lower right sides of the material control baffle 5. The fixing plates 14 are attached to the outside of the lower side plate 302a, and the fixing plates 14 are fixed to the corresponding lower side plate 302a by several fasteners 15. In this embodiment, the material control baffle 5 is fixed to the feed cylinder 3 by fastening bolts. The lateral length of the material control baffle 5 extending into the lower cylinder 302 is one-third to one-half of the distance between the left and right lower side plates 302a of the lower cylinder 302.

[0025] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A feeding device for a twin-screw extruder, comprising a horizontally arranged housing, two parallel extrusion screws rotatably arranged inside the housing, the two extrusion screws being arranged at the same height, and a feeding cylinder arranged on the upper side of the housing, the feeding cylinder being connected to the interior of the housing, characterized in that, The feed cylinder includes an upper cylinder and a lower cylinder. The upper cylinder includes four corresponding upper side plates. The cross-sectional area of ​​the upper cylinder decreases from top to bottom in the horizontal direction. The lower cylinder includes four lower side plates forming a rectangle. A mounting hole is opened horizontally through the right lower side plate. A material control baffle passes through the mounting hole and extends into the lower cylinder. The rectangular material control baffle is horizontally set, and the front and rear sides of the material control baffle are respectively set to abut against the inner walls of the front and rear lower side plates of the lower cylinder.

2. The feeding device for a twin-screw extruder according to claim 1, characterized in that, The inner walls of both the front and rear lower side plates are provided with guide components. The guide components include two guide strips that correspond to the upper and lower sides of the material control baffle, respectively, and the outer side of the guide strips is arc-shaped.

3. The feeding device for a twin-screw extruder according to claim 2, characterized in that, A screw jack is horizontally arranged on the housing corresponding to the material control baffle, and the drive end of the screw jack is connected to the material control baffle for transmission.

4. The feeding device for a twin-screw extruder according to claim 3, characterized in that, The lower cylinder is provided with longitudinal mounting plates on both the front and rear sides, and transverse guide rods are provided on the mounting plates. The material control baffle is provided with longitudinal side limiting plates on both the front and rear sides. Each side limiting plate has a guide hole corresponding to the guide rod. The guide rod is fitted through the corresponding guide hole. A spring is sleeved on the outer periphery of the guide rod. The left and right ends of the spring elastically abut against the corresponding mounting plate and the side limiting plate, respectively. An anti-detachment baffle is provided at the end of the guide rod. The anti-detachment baffle is located on the other side of the side limiting plate.

5. A twin-screw extruder feeding device according to claim 2, characterized in that, The material control baffle is provided with fixing plates on both the upper and lower right sides. The fixing plates are attached to the outside of the lower side plate and are fixed to the corresponding lower side plate by several fasteners.

6. A twin-screw extruder feeding device according to any one of claims 1-5, characterized in that, A feeder is provided corresponding to the top of the feed cylinder.

Images