Screw extrusion feeding device for removing impurities from the surface of raw materials

Abstract

This utility model belongs to the field of conveying technology for raw materials such as cut materials, scraps, offcuts, waste materials, and broken materials. Specifically, it relates to a spiral extrusion feeding device for removing surface impurities from raw materials. The output shaft of its drive motor is connected to the connecting end of a rotating shaft. The spiral extrusion feeding structure has a slag removal section near the connecting end of the rotating shaft. A slag collection blind hole is provided in the rotating shaft within the slag removal section, with the opening of the blind hole facing the connecting end. Multiple slag inlet holes are provided on the rotating shaft, located in the slag removal section and communicating with the blind slag collection holes. The inlet of each slag inlet hole is located within a spiral groove formed by the spiral blades. Multiple slag outlet holes are provided on the feeding pipe, communicating with its own internal cavity and located in the slag removal section. This device not only removes most of the surface impurities from the raw materials but also discharges the gas from the compressed raw materials in the feeding pipe, resulting in finished profiles with fewer impurities and better quality.

Description

Technical Field

[0001] This utility model belongs to the field of conveying technology for raw materials such as cut materials, scraps, offcuts, waste materials and broken materials, and specifically relates to a spiral extrusion feeding device for removing impurities from the surface of raw materials. Background Technology

[0002] Low-temperature non-ferrous metals are characterized by their softness and low melting point, such as lead, zinc, and tin. The production process of low-temperature non-ferrous metal strips requires the use of extrusion presses to extrude ingots or bars.

[0003] The existing extruder includes an extrusion cylinder and a feed pipe connected to the inner cavity of the extrusion cylinder. One end of the feed pipe is connected to the side wall of the extrusion cylinder and has a raw material outlet, while the other end of the feed pipe is away from the extrusion cylinder and has a raw material inlet. A spiral extrusion feeding mechanism is coaxially arranged within the feed pipe and is driven by a drive motor located at the end of the spiral extrusion feeding mechanism away from the extrusion cylinder and outside the feed pipe. The drive motor drives the spiral extrusion feeding mechanism to rotate around its own axis, thereby feeding material into the inner cavity of the extrusion cylinder in a direction perpendicular to the axis of the extrusion cylinder. One end of the extrusion cylinder is a fixed end, and the other end is an installation end. An extrusion cylinder is installed at the fixed end of the extrusion cylinder, and the piston of the extrusion cylinder extends into and is fitted into the inner cavity of the extrusion cylinder. A forming die is installed at the installation end of the extrusion cylinder, and the inner cavity of the forming die is connected to the inner cavity of the extrusion cylinder. The connection between the extrusion cylinder and the feed pipe is located between the initial position of the piston of the extrusion cylinder and the installation end of the extrusion cylinder. The piston of the extrusion cylinder extrudes the material to be formed in the inner cavity of the extrusion cylinder in the direction from the fixed end to the installation end.

[0004] Raw materials such as cut materials, scraps, offcuts, waste materials, and broken materials are fed into the feeding pipe through the raw material inlet. The drive motor drives the screw extrusion feeding mechanism to rotate around its own axis, feeding the raw materials such as cut materials, scraps, offcuts, waste materials, and broken materials into the inner cavity of the extrusion cylinder. When the drive motor stops driving the screw extrusion feeding mechanism, the piston of the extrusion cylinder extrudes the material to be formed in the inner cavity of the extrusion cylinder along the direction from the fixed end to the installation end, and then outputs the low-temperature non-ferrous metal finished product that meets the requirements from the discharge port of the forming mold. It can be either strip or profile.

[0005] When raw materials such as cut materials, scraps, offcuts, waste, and broken pieces have impurities such as oxide scale, dust, and dirt on their surface, a large amount of these impurities entering the extrusion cylinder cavity can easily lead to high impurity content and poor quality in the processed low-temperature non-ferrous metal products. If surface impurities on these raw materials are removed manually, there are technical problems such as inconvenience in operation, large workload, and time and labor consumption. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a spiral extrusion feeding device for removing impurities from the surface of raw materials, which can remove most of the oxide scale on the surface of the raw materials during the conveying process.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a spiral extrusion feeding device for removing impurities from the surface of raw materials, comprising a spiral extrusion feeding structure and a drive motor; the spiral extrusion feeding structure includes a feeding pipe and a spiral extrusion feeding mechanism coaxially arranged in the feeding pipe; the spiral extrusion feeding mechanism includes a rotating shaft and spiral blades arranged on the outer circumferential surface of the rotating shaft; one end of the rotating shaft is a connecting end and the other end is a free end; a raw material inlet is provided at the end of the feeding pipe corresponding to the connecting end, and a raw material outlet is provided at the end of the feeding pipe corresponding to the free end; the connecting end of the rotating shaft is rotatably mounted on a rotating seat, and the output shaft of the drive motor is drively connected to the connecting end of the rotating shaft; the spiral extrusion feeding structure has a slag removal section near the connecting end of the rotating shaft.

[0008] The rotating shaft is provided with a slag collection blind hole located in the slag removal section, and the opening of the slag collection blind hole faces the connecting end; the rotating shaft is provided with a plurality of slag inlet holes located in the slag removal section and connected to the slag collection blind hole, and the inlet of each slag inlet hole is located in the spiral groove formed by the spiral blades; the feeding pipe is provided with a plurality of slag outlet holes connected to its own inner cavity and located in the slag removal section.

[0009] Furthermore, the spiral extrusion feeding structure also includes a pre-extrusion reinforcement section that gradually reduces the space through which the raw material passes, and the slag removal section and the pre-extrusion reinforcement section are arranged sequentially along the direction from the connecting end to the free end.

[0010] Furthermore, the feeding tube is a cylindrical tube, and the spacing between the spiral blades in the pre-extrusion reinforcing section gradually decreases along the direction from the connecting end to the free end.

[0011] Furthermore, the feeding tube is a cylindrical tube, and along the direction from the connecting end to the free end, the distance between the outer edge of the spiral blade in the pre-extrusion reinforcing section and the axis of rotation gradually decreases.

[0012] Furthermore, the feeding tube is a trumpet-shaped structure with a large inner diameter at one end and a small inner diameter at the other end. The end with the large inner diameter of the feeding tube is arranged corresponding to the connecting end, and the end with the small inner diameter of the feeding tube is arranged corresponding to the free end.

[0013] Furthermore, it also includes a heating device installed on the feeding pipe, which is arranged corresponding to the pre-extrusion reinforcing section.

[0014] Furthermore, when the spiral extrusion feeding structure extrudes and feeds material vertically downwards, the rotating shafts of both the feeding pipe and the spiral extrusion feeding mechanism are vertically oriented.

[0015] The upper opening of the feeding pipe serves as the raw material inlet, and the lower opening serves as the raw material outlet.

[0016] The connecting end of the rotating shaft of the spiral extrusion feeding mechanism is at the top, and the free end is at the bottom.

[0017] Furthermore, it also includes a feed hopper, which is located at the upper end of a vertically arranged feeding pipe.

[0018] Furthermore, it also includes a horizontal support plate, which is disposed at the upper opening of the feed hopper, and one or both edges of the horizontal support plate have a feeding distance from the top opening edge of the feed hopper.

[0019] A first bearing is mounted on the horizontal support plate, which serves as the rotating seat, and the first drive motor is mounted on the horizontal support plate.

[0020] Furthermore, when the spiral extrusion feeding structure extrudes and feeds material in the horizontal direction, the rotating shafts of both the feeding pipe and the spiral extrusion feeding mechanism are horizontally arranged.

[0021] The top wall of the feeding pipe is provided with a feeding window near the connecting end, which serves as the raw material inlet. The openings arranged on the feeding pipe opposite to the free end serve as the raw material outlets. A vertical end plate is provided at the end of the feeding pipe adjacent to the connecting end, and a second bearing is installed on the vertical end plate, which serves as the rotating seat.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a spiral extrusion feeding device for removing impurities from the surface of raw materials. By setting a slag inlet hole and a slag collection blind hole on the rotating shaft, and a slag outlet hole on the feeding pipe, not only can most of the surface impurities of the raw materials be removed, but also the gas in the extruded raw materials in the feeding pipe can be discharged, resulting in less impurities and better quality in the finished profiles produced after subsequent processing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of another embodiment of the present invention;

[0025] Reference numerals in the attached drawings: 1-Rotating shaft; 101-Connecting end; 102-Free end; 103-Slag collection blind hole; 104-Slag inlet hole; 2-Helical blade; 3-Slag removal section; 4-Pre-extrusion reinforcing section; 5-Feeding pipe; 501-Slag outlet hole; 502-Feeding window; 6-Feeding hopper; 7-Horizontal support plate; 701-Feeding spacing; 702-First bearing; 8-Drive motor; 9-Gear set; 10-Vertical end plate; 1001-Second bearing; 11-Heating device. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] A spiral extrusion feeding device for removing impurities from the surface of raw materials includes a spiral extrusion feeding structure and a drive motor 8; the spiral extrusion feeding structure includes a feeding pipe 5 and a spiral extrusion feeding mechanism coaxially arranged in the feeding pipe 5; the spiral extrusion feeding mechanism includes a rotating shaft 1 and spiral blades 2 arranged on the outer circumferential surface of the rotating shaft 1; one end of the rotating shaft 1 is a connecting end 101, and the other end is a free end 102; the feeding pipe 5 has a raw material inlet at the end corresponding to the connecting end 101 and a raw material outlet at the end corresponding to the free end 102; the connecting end 101 of the rotating shaft 1 is rotatably mounted on a rotating seat, and... The output shaft of the drive motor 8 is connected to the connection end 101 of the rotating shaft 1; the spiral extrusion feeding structure has a slag removal section 3 near the connection end 101 of the rotating shaft 1; the rotating shaft 1 is provided with a slag collection blind hole 103 located in the slag removal section 3, and the opening of the slag collection blind hole 103 faces the connection end 101; the rotating shaft 1 is provided with a plurality of slag inlet holes 104 located in the slag removal section 3 and connected to the slag collection blind hole 103, and the inlet of each slag inlet hole 104 is located in the spiral groove formed by the spiral blade 2; the feeding pipe 5 is provided with a plurality of slag outlet holes 501 connected to its own inner cavity and located in the slag removal section 3.

[0028] The output shaft of the drive motor 8 is connected to the connecting end 101 of the rotating shaft 1 via a spline connection or a gear set 9. In actual use, the feeding pipe 5 is connected to the inner cavity of the extrusion cylinder, the raw material outlet end of the feeding pipe 5 is connected to the side wall of the extrusion cylinder, and the raw material inlet end of the feeding pipe 5 is away from the extrusion cylinder. The free end 102 of the rotating shaft 1 is adjacent to the extrusion cylinder, and the connecting end 101 of the rotating shaft 1 is away from the extrusion cylinder. Raw materials such as cut materials, scraps, offcuts, waste materials, and broken materials are fed into the feeding pipe 5 from the raw material inlet. The drive motor 8 drives the screw extrusion feeding mechanism to rotate around the axial direction of the rotating shaft 1, and the screw extrusion feeding mechanism feeds materials from the connecting end 101 to the free end 102. During the conveying process of the raw material in the feeding pipe 5, it is subjected to compression and friction, causing the oxide scale on the surface of the raw material to break off and fall off, along with dust and dirt. This debris then enters the slag collection blind hole 103 through the slag inlet hole 104 for collection, and is discharged out of the feeding pipe 5 through the slag outlet hole 501. This process removes most of the surface impurities of the raw material, resulting in less impurities and better quality in the subsequently processed profiles. The slag outlet hole 501 also serves to vent air.

[0029] Preferably, the spiral extrusion feeding structure further includes a pre-extrusion reinforcing section 4 that gradually reduces the space through which the raw material passes. The slag removal section 3 and the pre-extrusion reinforcing section 4 are arranged sequentially along the direction from the connecting end 101 to the free end 102. By setting the pre-extrusion reinforcing section 4, it is beneficial to further pre-compact the loose raw materials and eliminate the gaps between the loose raw materials.

[0030] As a further preferred embodiment, a heating device 11 is also included, which is disposed on the feeding pipe 5 and is arranged correspondingly to the pre-extrusion reinforcing section 4. The heating device 11 can be an electric heating wire, an inductor coil, an electric heating rod, etc. The pre-compressed raw material is softened by heating through the heating device 11, which can further improve the compression effect of the raw material.

[0031] The pre-extrusion reinforcing section 4 has multiple implementation methods, including but not limited to the following two:

[0032] In Example 1, the feeding tube 5 is a cylindrical tube, and the spacing between the spiral blades 2 in the pre-extrusion reinforcing section 4 gradually decreases along the direction from the connecting end 101 to the free end 102.

[0033] In the second embodiment, the feeding tube 5 is a cylindrical tube, and the distance between the outer edge of the spiral blade 2 of the pre-extrusion reinforcing section 4 and the axis of the rotating shaft 1 gradually decreases along the direction from the connecting end 101 to the free end 102.

[0034] Preferably, the feeding pipe 5 is a trumpet-shaped structure with a large inner diameter at one end and a small inner diameter at the other end. The end of the feeding pipe 5 with the large inner diameter is arranged corresponding to the connecting end 101, and the end of the feeding pipe 5 with the small inner diameter is arranged corresponding to the free end 102. By further reducing the space for the raw material to pass through, the pre-compression effect on the raw material is improved.

[0035] The feeding tube 5, rotating shaft 1, and spiral blade 2 can all be made of cemented carbide. Preferably, the feeding tube 5, rotating shaft 1, and spiral blade 2 are all made of steel.

[0036] In practical use, the spiral extrusion feeding structure can feed materials vertically downwards, horizontally, or inclined downwards. Examples include, but are not limited to, the following:

[0037] In Embodiment 1, when the spiral extrusion feeding structure extrudes and feeds material vertically downwards, both the feeding pipe 5 and the rotating shaft 1 of the spiral extrusion feeding mechanism are vertically arranged; the upper opening of the feeding pipe 5 serves as the raw material inlet, and the lower opening serves as the raw material outlet; the connecting end 101 of the rotating shaft 1 of the spiral extrusion feeding mechanism is at the top, and the free end 102 is at the bottom. The raw material is fed into the feeding pipe 5 through the upper opening.

[0038] Preferably, it also includes a feed hopper 6, which is disposed at the upper end of the vertically arranged feeding pipe 5.

[0039] As a further preferred embodiment, a horizontal support plate 7 is also included. The horizontal support plate 7 is disposed at the upper opening of the feed hopper 6, and one or both edges of the horizontal support plate 7 have a feeding gap 701 with the top opening edge of the feed hopper 6. A first bearing 702 is mounted on the horizontal support plate 7, serving as the rotating seat. The drive motor 8 is mounted on the horizontal support plate 7. The horizontal support plate 7 provides mounting support for the rotating shaft 1 of the screw extrusion feeding mechanism and the drive motor 8. Raw materials are fed into the feed hopper 6 through the feeding gap 701.

[0040] Preferably, the horizontal support plate 7 is disposed in the middle of the top opening of the feed hopper 6, and both sides of the horizontal support plate 7 have a feeding distance 701 with the top opening edge of the feed hopper 6.

[0041] In Example 2, when the screw extrusion feeding structure extrudes and feeds material horizontally, both the feeding pipe 5 and the rotating shaft 1 of the screw extrusion feeding mechanism are horizontally arranged. A feeding window 502 is provided on the top wall of the feeding pipe 5 near the connecting end 101. The feeding window 502 serves as the raw material inlet, and the openings corresponding to the free end 102 of the feeding pipe 5 serve as raw material outlets. A vertical end plate 10 is provided at the end of the feeding pipe 5 adjacent to the connecting end 101. A second bearing 1001 is mounted on the vertical end plate 10, serving as the rotating seat. The vertical end plate 10 provides mounting support for the rotating shaft 1 of the screw extrusion feeding mechanism. The drive motor 8 is mounted via a frame.

[0042] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. All equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A spiral extrusion feeding device for removing impurities from the surface of raw materials, comprising a spiral extrusion feeding structure and a drive motor (8); the spiral extrusion feeding structure comprises a feeding pipe (5) and a spiral extrusion feeding mechanism coaxially disposed in the feeding pipe (5); the spiral extrusion feeding mechanism comprises a rotating shaft (1) and spiral blades (2) disposed on the outer circumferential surface of the rotating shaft (1); one end of the rotating shaft (1) is a connecting end (101), and the other end is a free end (102); a raw material inlet is provided at the end of the feeding pipe (5) corresponding to the connecting end (101), and a raw material outlet is provided at the end of the feeding pipe (5) corresponding to the free end (102); the connecting end (101) of the rotating shaft (1) is rotatably mounted on a rotating seat, and the output shaft of the drive motor (8) is connected to the connecting end (101) of the rotating shaft (1); characterized in that: The spiral extrusion feeding structure has a slag removal section (3) near the connection end (101) of the rotating shaft (1). The rotating shaft (1) is provided with a slag collection blind hole (103) located in the slag removal section (3), and the opening of the slag collection blind hole (103) faces the connecting end (101); the rotating shaft (1) is provided with a plurality of slag inlet holes (104) located in the slag removal section (3) and connected to the slag collection blind hole (103), and the inlet of each slag inlet hole (104) is located in the spiral groove formed by the spiral blade (2); the feeding pipe (5) is provided with a plurality of slag outlet holes (501) connected to its own inner cavity and located in the slag removal section (3).

2. The screw extrusion feeding device for removing impurities from the surface of raw materials as described in claim 1, characterized in that: The spiral extrusion feeding structure also includes a pre-extrusion reinforcement section (4) that gradually reduces the space through which the raw material passes. The slag removal section (3) and the pre-extrusion reinforcement section (4) are arranged sequentially along the direction from the connecting end (101) to the free end (102).

3. The spiral extrusion feeding device for removing impurities from the surface of raw materials as described in claim 2, characterized in that: The feeding pipe (5) is a cylindrical tube, and the spacing between the spiral blades (2) located in the pre-extrusion reinforcing section (4) gradually decreases along the direction from the connecting end (101) to the free end (102).

4. The screw extrusion feeding device for removing impurities from the surface of raw materials as described in claim 2, characterized in that: The feeding pipe (5) is a cylindrical tube. Along the direction from the connecting end (101) to the free end (102), the distance between the outer edge of the spiral blade (2) in the pre-extrusion reinforcing section (4) and the axis of the rotating shaft (1) gradually decreases.

5. The spiral extrusion feeding device for removing impurities from the surface of raw materials as described in claim 2, characterized in that: The feeding pipe (5) is a trumpet-shaped structure with a large inner diameter at one end and a small inner diameter at the other end. The end with the large inner diameter of the feeding pipe (5) is arranged correspondingly to the connecting end (101), and the end with the small inner diameter of the feeding pipe (5) is arranged correspondingly to the free end (102).

6. The spiral extrusion feeding device for removing impurities from the surface of raw materials as described in claim 2, characterized in that: It also includes a heating device (11) installed on the feed pipe (5), which is arranged in relation to the pre-extrusion reinforcing section (4).

7. The screw extrusion feeding device for removing impurities from the surface of raw materials as described in any one of claims 1-6, characterized in that: When the spiral extrusion feeding structure extrudes and feeds material vertically downwards, the feeding pipe (5) and the rotating shaft (1) of the spiral extrusion feeding mechanism are both vertically arranged; The upper opening of the feeding pipe (5) serves as the raw material inlet, and the lower opening serves as the raw material outlet. The connecting end (101) of the rotating shaft (1) of the spiral extrusion feeding mechanism is on top, and the free end (102) is on the bottom.

8. The screw extrusion feeding device for removing impurities from the surface of raw materials as described in claim 7, characterized in that: It also includes a feed hopper (6), which is located at the upper end of a vertically arranged feeding pipe (5).

9. The spiral extrusion feeding device for removing impurities from the surface of raw materials as described in claim 8, characterized in that: It also includes a horizontal support plate (7), which is disposed at the upper opening of the feed hopper (6), and one or both sides of the horizontal support plate (7) have a feeding gap (701) with the top opening edge of the feed hopper (6). A first bearing (702) is installed on the horizontal support plate (7), and the first bearing (702) serves as the rotating seat. A first drive motor (8) is installed on the horizontal support plate (7).

10. The screw extrusion feeding device for removing impurities from the surface of raw materials as described in any one of claims 1-6, characterized in that: When the spiral extrusion feeding structure extrudes and feeds material in the horizontal direction, the feeding pipe (5) and the rotating shaft (1) of the spiral extrusion feeding mechanism are both set horizontally. The top wall of the feeding pipe (5) is provided with a feeding window (502) near the connecting end (101). The feeding window (502) serves as the raw material inlet, and the openings arranged in the feeding pipe (5) and the free end (102) serve as the raw material outlets. A vertical end plate (10) is provided at the end of the feeding pipe (5) adjacent to the connecting end (101). A second bearing (1001) is installed on the vertical end plate (10), and the second bearing (1001) serves as the rotating seat.

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