Feeding device of extruder

Abstract

The utility model relates to the technical field of feeding of extruders, and aims to solve the problems that the conventional feeding device only adopts stirring blades and the like for stirring in a raw material premixing stage, so that heat is generated by friction, raw materials are easy to melt and cake, and blockage is caused. The utility model provides a feeding device of an extruder, which comprises a spiral feeder, a stirring box, a rack and a plurality of cold air feeders, the stirring box is arranged at the top of the rack; the spiral feeder is arranged at the bottom of the stirring box; the plurality of cold air feeders are communicated with the stirring box; the stirring box is communicated with the spiral feeder through a material pumping assembly; by the adoption of the cold air feeder, efficient conveying of raw materials can be guaranteed, certain conveying temperature and stirring temperature can be kept, and the situation that in the conveying or stirring process of the raw materials, the raw materials are melted and agglomerated due to friction, and consequently a pipeline is blocked is avoided.

Description

Technical Field

[0001] This utility model relates to the field of extruder feeding technology, and more specifically, to a feeding device for an extruder. Background Technology

[0002] The extruder feeding device is an important component of the extruder, mainly responsible for storing, conveying, and adding raw materials to the screw section of the extruder; its function is to ensure a stable and uniform supply of raw materials to guarantee the continuity of the extrusion process and product quality.

[0003] For example, the patent with publication number CN203246057U discloses an additive feeding device for an extruder. Specifically, the additive in the mixing tank is pre-stirred evenly by a stirring motor and stirring blades, and then the additive is transported to the port of the conveying pipe through a connecting pipe. Under the action of a fan, the additive can be evenly transported to the feeding hopper. However, although the raw materials or additives are pre-stirred and mixed, during the stirring process, the stirring blades not only further crush the raw materials, but also easily cause the crushed raw materials to melt and clump due to the heat generated by friction during the stirring and mixing process, thus causing blockage.

[0004] Based on the above description, there is an urgent need for a feeding device for extruders that can uniformly mix the raw materials without causing raw material agglomeration or blockage of pipelines. Utility Model Content

[0005] The purpose of this invention is to provide a feeding device for an extruder, which aims to solve the technical problem that existing feeding devices only use stirring blades or similar means for stirring during the premixing stage, which leads to frictional heat generation and easy melting and clumping of raw materials, resulting in blockage.

[0006] The embodiments of this utility model are achieved through the following technical solutions:

[0007] A feeding device for an extruder includes a screw feeder and a mixing chamber, and also includes a frame and multiple cold air feeders; the mixing chamber is located at the top of the frame; the screw feeder is located at the bottom of the mixing chamber; the multiple cold air feeders are connected to the mixing chamber; the mixing chamber is connected to the screw feeder through a material extraction assembly.

[0008] Preferably, one end of the mixing tank is connected to the frame; the other end of the mixing tank is provided with a spherical mixing chamber; and the cold air feeder is connected to the spherical mixing chamber through a feeding bend.

[0009] Preferably, the frame is provided with a stirring shaft extending into the spherical stirring chamber; the stirring shaft is surrounded by a stirring paddle; and the stirring paddle is provided with multiple vent holes.

[0010] Preferably, the material extraction assembly includes a material extraction pipe, a material extraction machine, and a discharge pipe; the mixing tank is connected to the material extraction machine through the material extraction pipe; and the material extraction machine is connected to the screw feeder through the discharge pipe.

[0011] Preferably, a discharge assembly is provided at one end of the extraction pipe near the mixing tank.

[0012] Preferably, the feeding assembly includes a baffle plate and a rotating shaft; the rotating shaft passes through the feeding tube and is connected to the baffle plate; the baffle plate is disposed inside the feeding tube.

[0013] Preferably, the feeding assembly further includes a rotating rod; the end of the feeding tube away from the rotating shaft is provided with a groove; one end of the rotating rod is embedded in the groove; the other end of the rotating rod passes through the feeding tube and is connected to the baffle plate.

[0014] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0015] This invention utilizes a cold air feeder to deliver raw materials or additives into a mixing tank at the top of the machine frame, where they are then stirred and mixed at a low temperature. After mixing, the mixture is fed into a screw feeder at the bottom of the machine frame via a material extraction assembly for uniform feeding into the extruder. The use of a cold air feeder ensures efficient material delivery while maintaining a certain conveying and mixing temperature, effectively preventing the raw materials from melting and clumping due to friction during conveying or mixing, thus avoiding pipe blockage. Furthermore, it ensures the uniformity of the mixture fed into the extruder via the screw feeder. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 for Figure 1 A sectional view;

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of local structure A in the middle;

[0019] Figure 4 This is a top view of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the stirring shaft in this utility model.

[0021] Icons: 1-Screw feeder, 2-Mixing tank, 21-Spherical mixing chamber, 3-Frame, 4-Cold air feeder, 5-Extraction assembly, 51-Extraction pipe, 52-Extraction machine, 53-Discharge pipe, 6-Mixing shaft, 7-Mixing paddle, 8-Feeding bend, 9-Discharge assembly, 91-Baffle plate, 92-Rotating shaft, 93-Rotating rod, 10-Groove. Detailed Implementation

[0022] The specific implementation method is described below with reference to the accompanying drawings.

[0023] Example 1

[0024] Please see Figures 1 to 5 The present invention provides the following technical solution: a feeding device for an extruder, which is suitable for the uniform mixing and feeding of materials in an extruder.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, a feeding device for an extruder includes a screw feeder 1 and a mixing chamber 2, as well as a frame 3 and multiple cold air feeders 4; the mixing chamber 2 is located at the top of the frame 3; the screw feeder 1 is located at the bottom of the mixing chamber 2; the multiple cold air feeders 4 are connected to the mixing chamber 2; the mixing chamber 2 is connected to the screw feeder 1 through a material extraction assembly 5.

[0026] In this embodiment, a cold air feeder is used to feed the raw materials or additives into the mixing tank 2 at the top of the frame 3, and then the mixture is stirred and mixed at a low temperature. After mixing, the mixture is fed into the screw feeder at the bottom of the frame 3 by the material extraction component 5 for uniform feeding to the extruder. The use of a cold air feeder 4 can ensure efficient conveying of raw materials and maintain a certain conveying and mixing temperature, thereby effectively avoiding the situation where the raw materials melt and clump due to friction during conveying or mixing, causing pipeline blockage. It also further ensures the uniformity of the mixture fed into the extruder by the screw feeder 1.

[0027] Specifically, such as Figure 2 and Figure 4 As shown, one end of the mixing tank 2 is connected to the frame 3; the other end of the mixing tank 2 is provided with a spherical mixing chamber 21; the cold air feeder 4 is connected to the spherical mixing chamber 21 through the feeding bend 8.

[0028] In this embodiment, the mixing tank 2 is screwed to the top of the frame 3 via a mounting plate or directly welded to the top of the frame 3. Furthermore, by setting a spherical mixing chamber 21 in the mixing tank 2, it is convenient to combine multiple feeding bends 8 to blow raw materials into the mixing tank from bottom to top, while forming a "convection" situation to achieve preliminary mixing and buffering. In addition, it is also convenient to install the mixing shaft 6 and other components for further mixing, and the groove structure at the bottom of the spherical mixing chamber 21 can be used as a collection hopper for easy material extraction.

[0029] Specifically, such as Figure 2 and Figure 5 As shown, a stirring shaft 6 passes through the spherical stirring chamber 21 of the frame 3; a stirring paddle 7 is arranged around the stirring shaft 6; and the stirring paddle 7 is provided with multiple vent holes.

[0030] In this embodiment, by setting a stirring shaft 6 and a stirring paddle 7 in the spherical stirring chamber 21, the mixing function can be achieved. The stirring paddle 7 is provided with multiple vent holes so that the material is blown in by the feeding bend 8 and then diverted to achieve uniform mixing. In addition, in order to ensure that the stirring shaft 6 and the stirring paddle 7 can rotate and stir in the spherical stirring chamber 21, they need to be flexibly selected according to the specific size of the spherical stirring chamber 21, so that their height or length is less than the diameter of the spherical stirring chamber 21.

[0031] Specifically, such as Figure 2 and Figure 3 As shown, the material extraction assembly 5 includes a material extraction pipe 51, a material extraction machine 52, and a discharge pipe 53; the mixing tank 2 is connected to the material extraction machine 52 through the material extraction pipe 51; the material extraction machine 52 is connected to the screw feeder 1 through the discharge pipe 53.

[0032] In this embodiment, the material extractor 52 adopts a self-priming material extractor, a blower-type material extractor, or the like commonly used in the art.

[0033] Specifically, such as Figure 2 and Figure 3 As shown, a discharge assembly 9 is installed at one end of the extraction pipe 51 near the mixing tank 2. The discharge assembly 9 includes a baffle plate 91 and a rotating shaft 92; the rotating shaft 92 passes through the extraction pipe 51 and is connected to the baffle plate 91; the baffle plate 91 is disposed inside the extraction pipe 51. The discharge assembly 9 also includes a rotating rod 93; a groove 10 is provided at one end of the extraction pipe 51 away from the rotating shaft 92; one end of the rotating rod 93 is embedded in the groove 10; the other end of the rotating rod 93 passes through the extraction pipe 51 and is connected to the baffle plate 91.

[0034] In this embodiment, the extraction pipe 51 is made of thick-walled plastic or alloy steel. A baffle plate 91 is installed inside to roughly control the amount and timing of material discharge from the mixing tank 2, thereby reducing the feeding load on the screw feeder 1. Specifically, the baffle plate 91 is a circular baffle plate with a diameter smaller than the inner diameter of the extraction pipe 51. The rotating shaft 92 is driven by a servo motor to rotate and adjust the circular baffle plate. When the circular baffle plate 91 is in the horizontal direction, it can separate the material from the extraction pipe 51 and block the material. When the circular baffle plate 91 is in the vertical direction, it can achieve the maximum opening and discharge the material. To further ensure the stability of the circular baffle plate 91, a rotating rod 93 and a groove 10 for the rotating rod 93 to be embedded are further provided to reinforce the circular baffle plate 91.

Claims

1. A feeding device of an extruder comprising a screw feeder (1) and a mixing chamber (2), characterized in that: It also includes a rack (3) and a plurality of cold air feeders (4); the stirring box (2) is arranged on the top of the rack (3); the screw feeder (1) is arranged at the bottom of the stirring box (2); a plurality of the cold air feeders (4) are communicated with the stirring box (2); the stirring box (2) is communicated with the screw feeder (1) through the material pumping assembly (5).

2. The feeding device of an extruder according to claim 1, characterized in that: One end of the stirring box (2) is connected with the rack (3); the other end of the stirring box (2) is internally provided with a spherical stirring cavity (21); the cold air feeder (4) is communicated with the spherical stirring cavity (21) through a feeding elbow (8).

3. The feeding device of an extruder according to claim 2, characterized in that: The rack (3) is provided with a stirring shaft (6) penetrating the spherical stirring cavity (21); the stirring shaft (6) is annularly provided with stirring paddles (7); the stirring paddles (7) are provided with a plurality of air permeable holes.

4. The feeding device of an extruder according to claim 1, characterized in that: The material pumping assembly (5) includes a material pumping pipe (51), a material pumping machine (52) and a material discharging pipe (53); the stirring box (2) is communicated with the material pumping machine (52) through the material pumping pipe (51); the material pumping machine (52) is communicated with the screw feeder (1) through the material discharging pipe (53).

5. The feeding device of an extruder according to claim 4, characterized in that: The material pumping pipe (51) is provided with a discharging assembly (9) penetrating one end close to the stirring box (2).

6. The feeding device of an extruder according to claim 5, characterized in that: The discharging assembly (9) includes a material blocking plate (91) and a rotating shaft (92); the rotating shaft (92) penetrates the material pumping pipe (51) and is connected with the material blocking plate (91); the material blocking plate (91) is internally arranged in the material pumping pipe (51).

7. The feeding device of an extruder according to claim 6, characterized in that: The discharging assembly (9) further includes a rotating rod (93); one end of the material pumping pipe (51) away from the rotating shaft (92) is provided with a groove (10); One end of the rotating rod (93) is embedded in the groove (10); the other end of the rotating rod (93) penetrates the material pumping pipe (51) and is connected with the material blocking plate (91). The other end of the rotating rod (93) penetrates the material pumping pipe (51) and is connected with the material blocking plate (91).

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