Double-screw extruder for modified plastic production

Abstract

The utility model relates to the technical field of extruders, and discloses a twin-screw extruder for modified plastic production, which comprises a stirring mechanism, the bottom of the stirring mechanism is fixedly connected with a preheating mechanism, the bottom of the stirring mechanism is fixedly connected with a plasticizing mechanism, and the stirring mechanism comprises a stirring barrel. The top of the stirring barrel is fixedly connected with a feeding hopper, the inner wall of the stirring barrel is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a stirring shaft, the surface of the stirring shaft is fixedly connected with a cutting blade, the surface of the stirring shaft is fixedly connected with a stirring rod, and the inner wall of the stirring barrel is fixedly connected with a filter plate. The preheating mechanism is arranged, the heating pipe is arranged in the preheating pipe, materials can be evenly heated to a certain temperature in advance by heating the materials, it is guaranteed that the temperature of the materials can be evenly distributed in the whole preheating process, the problem of uneven temperature is avoided, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a twin-screw extruder used for producing modified plastics. Background Art

[0002] The twin-screw extruder is developed on the basis of the single-screw extruder. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in the molding processing of extruded products.

[0003] A twin-screw extruder with announcement number CN209775484U comprises a feeding mechanism, the feeding mechanism comprises a feeding port, a feeding screw is connected below the feeding port, a distance of one end of the thread of the feeding screw close to the feeding port is greater than a distance away from the other end of the feeding port, the feeding screw is connected to a feeding screw motor, a feeding barrel is arranged below the feeding mechanism, a rotating barrel is arranged inside the feeding barrel, a surface of the rotating barrel is made of metal material, the rotating barrel is connected to an external power supply, an extrusion mechanism is arranged below the feeding barrel, the extrusion mechanism comprises a barrel body, a heating layer is arranged outside the extrusion mechanism, a heat-insulating layer is arranged outside the heating layer, a vibrator is arranged outside the heat-insulating layer and is connected to the extrusion mechanism, the feeding screw is connected to a rotating shaft through a gear at the top, and the rotating shaft is connected to a feeding screw motor through a coupling.

[0004] The above-mentioned twin-screw extruder is configured such that the distance between the upper threads of the feed screw is greater than that between the lower threads. The upper section can process relatively large materials first to prevent blockage caused by small thread spacing, and then more detailed processing can be performed in the lower section. When the particles pass through the feeding barrel, the rotating barrel connected to the power supply is energized to generate adsorption to adsorb the residual metal particles. When the material enters the extrusion mechanism, blockage is likely to occur between the active screw and the driven screw. After the vibrator is turned on, the barrel vibrates to loosen the material for easy processing and effectively improve work efficiency. However, the feed screw of the device cannot handle relatively large materials well. Relatively large materials can only be extruded from the upper half to the lower half, which reduces practicality. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a twin-screw extruder for producing modified plastics.

[0006] The utility model is implemented by the following technical scheme: a twin-screw extruder for modified plastic production, comprising a stirring mechanism, a preheating mechanism is fixedly connected to the bottom of the stirring mechanism, and a plasticizing mechanism is fixedly connected to the bottom of the stirring mechanism;

[0007] The stirring mechanism includes a stirring barrel, a feeding hopper is fixedly connected to the top of the stirring barrel, a first motor is fixedly connected to the inner wall of the stirring barrel, a stirring shaft is fixedly connected to the output end of the first motor, a cutting blade is fixedly connected to the surface of the stirring shaft, a stirring rod is fixedly connected to the surface of the stirring shaft, a filter plate is fixedly connected to the inner wall of the stirring barrel, a first vibrator is fixedly connected to the bottom plate of the filter plate, a rotating sheet is provided on the inner wall of the stirring barrel, a second vibrator is fixedly connected to the bottom of the rotating sheet, and a support foot is fixedly connected to the surface of the stirring barrel.

[0008] Through the above technical solution, through the setting of the rotating plate, the first vibrator and the second vibrator, the rotating plate drops the material evenly into the preheating tube, avoiding material concentration and reducing the risk of blockage. The first vibrator and the second vibrator prevent the material from accumulating on the filter plate and the rotating plate.

[0009] As a further improvement of the above scheme, the preheating mechanism includes a preheating tube, the inner wall of the preheating tube is fixedly connected to a fixing frame, the surface of the preheating tube is fixedly connected to a control valve, and a heating tube is arranged inside the preheating tube.

[0010] Through the above technical solution, through the setting of the heating tube, a heating tube is provided in the preheating tube, and the material can be heated to a certain temperature in advance by heating the material, so that it reaches a temperature range suitable for extrusion processing.

[0011] As a further improvement of the above scheme, the plasticizing mechanism includes a base plate, the top of the base plate is fixedly connected to an extruder, the right side of the extruder is fixedly connected to a second motor, the top of the extruder is fixedly connected to a feed hopper, the left side of the extruder is provided with a discharge port, and the bottom of the base plate is fixedly connected to a support column.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides a rotating sheet to evenly drop the material into the preheating tube, thereby avoiding material concentration, reducing the risk of blockage and ensuring the normal operation of the device.

[0014] The utility model provides a first vibrator and a second vibrator. The first vibrator vibrates the filter plate to prevent materials from piling up on the filter plate. The piling up materials will affect the speed and effect of the materials passing through the filter plate. The vibrator vibrates the rotating sheet to prevent materials from piling up on the rotating sheet. The vibrator can effectively prevent the occurrence of piling up and maintain the normal operation of the equipment.

[0015] The utility model is provided with a preheating mechanism, and a heating tube is provided in the preheating tube. By heating the material, the material can be heated to a certain temperature in advance, so that it reaches a temperature range suitable for extrusion processing. In this way, the heating time of the twin-screw extruder can be shortened, the production efficiency can be improved, and the heating time and energy consumption of the twin-screw extruder can be reduced, the production cost can be reduced, and uniform heating can be provided to ensure that the material can be evenly distributed in temperature during the entire preheating process, avoid the problem of uneven temperature, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the new overall structure of the practical stirring mechanism;

[0020] Figure 5 This is a schematic diagram of the overall structure of the preheating tube of the utility model.

[0021] Description of main symbols:

[0022] 1. Stirring mechanism; 101. Stirring barrel; 102. Feeding hopper; 103. First motor; 104. Stirring shaft; 105. Cutting disc; 106. Stirring rod; 107. Filter plate; 108. First vibrator; 109. Rotating disc; 110. Second vibrator; 111. Support foot; 2. Preheating mechanism; 201. Preheating tube; 202. Fixed frame; 203. Control valve; 204. Heating tube; 3. Plasticizing mechanism; 301. Bottom plate; 302. Extruder; 303. Second motor; 304. Feeding hopper; 305. Discharge port; 306. Support column. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] Example:

[0025] Please combine Figure 1-5 , a twin-screw extruder for modified plastic production in this embodiment includes a stirring mechanism 1, a preheating mechanism 2 is fixedly connected to the bottom of the stirring mechanism 1, and a plasticizing mechanism 3 is fixedly connected to the bottom of the stirring mechanism 1;

[0026] The stirring mechanism 1 includes a stirring barrel 101, a feeding hopper 102 is fixedly connected to the top of the stirring barrel 101, a first motor 103 is fixedly connected to the inner wall of the stirring barrel 101, a stirring shaft 104 is fixedly connected to the output end of the first motor 103, a cutting blade 105 is fixedly connected to the surface of the stirring shaft 104, a stirring rod 106 is fixedly connected to the surface of the stirring shaft 104, a filter plate 107 is fixedly connected to the inner wall of the stirring barrel 101, a bottom plate 301 of the filter plate 107 is fixedly connected to a first vibrator 108, a rotating sheet 109 is provided on the inner wall of the stirring barrel 101, a second vibrator 110 is fixedly connected to the bottom of the rotating sheet 109, and a support foot 111 is fixedly connected to the surface of the stirring barrel 101.

[0027] There are two first vibration machines 108 , and the number of the second vibration machines 110 corresponds to the number of the first vibration machines 108 .

[0028] The inner wall of the mixing barrel 101 is fixedly connected to the rotating plate 109 , and the number of the supporting legs 111 is three.

[0029] The preheating mechanism 2 comprises a preheating tube 201 , the inner wall of which is fixedly connected with a fixing frame 202 , the surface of which is fixedly connected with a control valve 203 , and a heating tube 204 is arranged inside the preheating tube 201 .

[0030] The preheating tube 201 is located at the bottom of the mixing barrel 101 , and a through groove is provided inside the preheating tube 201 .

[0031] The plasticizing mechanism 3 includes a bottom plate 301, the top of the bottom plate 301 is fixedly connected to an extruder 302, the right side of the extruder 302 is fixedly connected to a second motor 303, the top of the extruder 302 is fixedly connected to a feed hopper 304, the left side of the extruder 302 is provided with a discharge port 305, and the bottom of the bottom plate 301 is fixedly connected to a support column 306.

[0032] The bottom plate 301 is located at the bottom of the support leg 111 , and there are four support columns 306 that are evenly distributed around the bottom of the bottom plate 301 .

[0033] The implementation principle of a twin-screw extruder for modified plastic production in the embodiment of the present application is as follows: pour the material into the hopper 102, stir the material with the stirring shaft 104, and then the material falls into the rotating sheet 109 through the filter plate 107. The first vibrator 108 vibrates to accelerate the filter plate 107 to filter quickly. The rotating sheet 109 is vibrated by the second vibrator 110 to evenly drop the material into the preheating tube 201, thereby avoiding material concentration, reducing the risk of blockage, and ensuring the normal operation of the device. Through the action of the vibrator, the occurrence of accumulation can be effectively prevented, and the normal operation of the equipment can be maintained. The material that does not fall into the filter plate 107 will continue to be broken by the cutting sheet 105. A heating tube 204 is provided in the preheating tube 201. By heating the material, the material can be heated to a certain temperature in advance so that it reaches a temperature range suitable for extrusion processing. This can shorten the twin-screw extrusion heating time and improve production efficiency. It can also reduce the heating time and energy consumption of the twin-screw extruder 302, reduce production costs, and provide uniform heating to ensure that the material can be evenly distributed in temperature throughout the preheating process, avoid the problem of uneven temperature, and improve product quality. Open the control valve 203, and the material enters the extruder 302 through the feed hopper 304, and then passes through the discharge port 305 after processing.

[0034] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A twin-screw extruder for producing modified plastics, comprising a stirring mechanism (1), characterized in that: The bottom of the stirring mechanism (1) is fixedly connected to a preheating mechanism (2), and the bottom of the stirring mechanism (1) is fixedly connected to a plasticizing mechanism (3); The stirring mechanism (1) comprises a stirring barrel (101), the top of the stirring barrel (101) is fixedly connected to a feeding hopper (102), the inner wall of the stirring barrel (101) is fixedly connected to a first motor (103), the output end of the first motor (103) is fixedly connected to a stirring shaft (104), the surface of the stirring shaft (104) is fixedly connected to a cutting blade (105), the surface of the stirring shaft (104) is fixedly connected to a stirring rod (106), the inner wall of the stirring barrel (101) is fixedly connected to a filter plate (107), the bottom of the filter plate (107) is fixedly connected to a first vibrator (108), the inner wall of the stirring barrel (101) is provided with a rotating blade (109), the bottom of the rotating blade (109) is fixedly connected to a second vibrator (110), and the surface of the stirring barrel (101) is fixedly connected to a support foot (111).

2. A twin-screw extruder for modified plastic production as claimed in claim 1, characterized in that: The number of the first vibration machines (108) is two, and the number of the second vibration machines (110) corresponds to the number of the first vibration machines (108).

3. A twin-screw extruder for modified plastic production as claimed in claim 1, characterized in that: The inner wall of the mixing barrel (101) is fixedly connected to the rotating plate (109), and the number of the supporting legs (111) is three.

4. A twin-screw extruder for modified plastic production as claimed in claim 1, characterized in that: The preheating mechanism (2) comprises a preheating tube (201), the inner wall of the preheating tube (201) is fixedly connected to a fixing frame (202), the surface of the preheating tube (201) is fixedly connected to a control valve (203), and a heating tube (204) is arranged inside the preheating tube (201).

5. A twin-screw extruder for modified plastic production as claimed in claim 4, characterized in that: The preheating tube (201) is located at the bottom of the stirring barrel (101), and a through groove is provided inside the preheating tube (201).

6. A twin-screw extruder for modified plastic production as claimed in claim 1, characterized in that: The plasticizing mechanism (3) comprises a bottom plate (301), the top of the bottom plate (301) is fixedly connected to an extruder (302), the right side of the extruder (302) is fixedly connected to a second motor (303), the top of the extruder (302) is fixedly connected to a feed hopper (304), the left side of the extruder (302) is provided with a discharge port (305), and the bottom of the bottom plate (301) is fixedly connected to a support column (306).

7. A twin-screw extruder for modified plastic production as claimed in claim 6, characterized in that: The bottom plate (301) is located at the bottom of the support leg (111), and the number of the support columns (306) is four and they are evenly distributed around the bottom of the bottom plate (301).

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