Automatic cutting mechanism for discharge hole of double-screw extruder

Abstract

The utility model discloses an automatic material cutting mechanism for a discharge port of a double-screw extruder, and belongs to the field of double-screw extrudes.The material cutting mechanism comprises a double-screw extruder body, a discharge frame body fixedly installed at the output end of the double-screw extruder body, and a cut-off assembly fixedly installed on the discharge frame body; the cutting assembly comprises two symmetrically-arranged stand columns fixedly installed on the discharging frame body, the outer side walls of the two stand columns and the outer side wall of the discharging frame body are horizontally arranged, a connecting frame is fixedly installed on the two stand columns, an air cylinder is fixedly installed on the connecting frame, and a blade is fixedly installed at the output end of the air cylinder. The inner side wall of the blade is attached to the outer side wall of the stand column. According to the cutting mechanism, the blade is attached to the outer wall of the discharging frame body during downward cutting, a plurality of plastic rubber strips extruded out of the discharging frame body at the same time are cut off together in a staggered mode, and compared with manual cutting, the efficiency is higher, cutting is more uniform and stable, and time and labor are saved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of double-screw extruders, and particularly relates to an automatic material cutting mechanism for a discharge port of a double-screw extruder. BACKGROUND

[0002] The double-screw extruder is a forming and processing device for extruded products, which is developed on the basis of the single-screw extruder, and has been widely applied to the forming and processing of the extruded products due to good feeding performance, mixing and plasticizing performance, exhaust performance and extrusion stability. The double-screw extruder is composed of a transmission device, a feeding device, a barrel and a screw, and the discharge device at the tail end of the barrel is a decisive component for the final forming of the finished product.

[0003] After the plastic strip is extruded through the discharge device, the continuously extruded plastic strip needs to be cut in a quantitative manner for convenient coiling and storage, and the existing cutting work is usually performed by manually scraping the discharge port of the discharge device with a scraper, which has poor stability and certain defects.

[0004] Therefore, the application provides an automatic material cutting mechanism for a discharge port of a double-screw extruder to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The application provides an automatic material cutting mechanism for a discharge port of a double-screw extruder, which aims to solve the problems that the existing cutting work is usually performed by manually scraping the discharge port of the discharge device with a scraper, which has poor stability and certain defects.

[0006] To achieve the above object, the application provides the following technical scheme: an automatic material cutting mechanism for a discharge port of a double-screw extruder, comprising a double-screw extruder body, a discharge rack body fixedly installed on the output end of the double-screw extruder body, and a cutting assembly fixedly installed on the discharge rack body.

[0007] The cutting assembly comprises two vertically arranged columns fixedly installed on the discharge rack body, the outer side walls of the two columns are horizontally arranged on the outer side wall of the discharge rack body, a connecting rack is fixedly installed on the two columns, a gas cylinder is fixedly installed on the connecting rack, a blade is fixedly installed on the output end of the gas cylinder, and the inner side wall of the blade is horizontally arranged on the outer side wall of the column. In this way, during use, the gas cylinder is started, the blade is driven to slide on the column through the output end of the gas cylinder, the blade is in close contact with the outer wall of the discharge rack body when cutting downward, and a plurality of plastic strips simultaneously extruded on the discharge rack body are cut off in a staggered manner. Compared with manual cutting, the efficiency is higher, the cutting is more uniform and stable, and time and labor are saved.

[0008] Preferably, in order to fix the assembly, the outer wall of the cylinder is fixedly provided with a clamping plate welded with the connecting frame, the outer wall of the blade is fixedly provided with a connecting block, the output end of the cylinder is inserted into the connecting block, and nuts are screwed on the output end of the cylinder at both ends of the connecting block. Thus, the blade is quickly fixed on the output end of the cylinder, facilitating disassembly, replacement and maintenance.

[0009] Preferably, in order to stabilize the blade, a sliding groove is formed in the outer wall of the column, a sliding rod is fixedly installed in the sliding groove, a sliding block matched with the sliding groove is slidingly installed on the sliding rod, and the outer wall of the sliding block is fixedly connected with the blade through screws. This ensures that the blade does not shake during cutting, improving cutting quality.

[0010] Preferably, in order to avoid material accumulation, a resisting plate is fixedly installed on the outer wall of the column away from the connecting frame, and a pressure sensor module electrically connected with the control end of the body of the double-screw extruder is fixedly installed on the resisting plate. This ensures the quality of discharging, continues feeding when the blade retreats, is stable and reliable, and avoids material jamming.

[0011] Preferably, in order to ensure cutting quality, the cutting mechanism further comprises a scraper fixedly installed between the two columns, the scraper is arranged on the column close to the connecting frame, and the outer wall of the scraper is in abutment with the inner wall of the blade. Thus, the blade can have stable sharpness during cutting, ensuring stable cutting.

[0012] The cutting mechanism starts the cylinder, the cylinder drives the blade to slide on the column through the output end, the blade is in abutment with the outer wall of the discharging frame body when cutting downward, and a plurality of plastic strips simultaneously extruded on the discharging frame body are cut off through the offset mode. Compared with manual cutting, the efficiency is higher, the cutting is more uniform and stable, and time and labor are saved.

[0013] When the cylinder retracts the blade through the output end, the plastic mucilage adhered to the blade edge part of the blade can be scraped off from the inside by the scraper, so that the blade edge part of the inner wall of the blade is not completely covered, so that the blade can have stable sharpness during cutting, ensuring stable cutting. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an appearance structure schematic view of an automatic cutting mechanism for a discharging port of a double-screw extruder.

[0015] Figure 2 It is a side structure schematic view of an automatic cutting mechanism for a discharging port of a double-screw extruder.

[0016] Figure 3 It is a cross-sectional structure schematic view of an automatic cutting mechanism for a discharging port of a double-screw extruder.

[0017] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 5 for Figure 3 Enlarged diagram of point B in the middle.

[0019] In the picture:

[0020] 1. Twin-screw extruder body; 2. Discharge rack body; 3. Cutting assembly; 31. Column; 32. Connecting frame; 33. Cylinder; 34. Blade; 35. Connecting block; 36. Slide groove; 37. Slide rod; 38. Slider; 39. Backing plate; 310. Pressure sensor module; 311. Clamping plate; 4. Scraper. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example 1

[0023] This embodiment provides an automatic material cutting mechanism at the discharge port of a twin-screw extruder, such as... Figures 1-5 As shown, the cutting mechanism includes a twin-screw extruder body 1, a discharge rack body 2 fixedly installed on the output end of the twin-screw extruder body 1, and a cutting assembly 3 fixedly installed on the discharge rack body 2.

[0024] The cutting assembly 3 includes two symmetrically arranged columns 31 fixedly installed on the discharge rack body 2. The outer walls of the two columns 31 are horizontally arranged with the outer walls of the discharge rack body 2. A connecting frame 32 is fixedly installed on the two columns 31. A cylinder 33 is fixedly installed on the connecting frame 32. A blade 34 is fixedly installed on the output end of the cylinder 33. The inner wall of the blade 34 is fitted with the outer wall of the column 31.

[0025] When in use, start the cylinder 33. The cylinder 33 drives the blade 34 to slide on the column 31 through the output end. When the blade 34 cuts down, it fits against the outer wall of the discharge rack body 2. By misaligning, it cuts several plastic strips that are extruded on the discharge rack body 2 at the same time. Compared with manual cutting, it is more efficient, the cutting is more uniform and stable, and it saves time and effort.

[0026] Specifically, the outer side wall of the cylinder 33 is fixedly provided with a clamping piece 311 welded with the connecting frame 32, the outer side wall of the blade 34 is fixedly provided with a connecting block 35, the output end of the cylinder 33 is inserted into the connecting block 35, and nuts are screwed on the output end of the cylinder 33 at both ends of the connecting block 35. In use, the cylinder 33 is fixedly connected with the connecting frame 32 through the clamping piece 311, then one nut is screwed on the output end of the cylinder 33, then the output end of the cylinder 33 is inserted into the connecting block 35 until it abuts against the nut, and then the other nut is screwed on the output end of the cylinder 33 to abut against the other end of the connecting block 35, so that the blade 34 is quickly fixed on the output end of the cylinder 33, facilitating disassembly, replacement and maintenance.

[0027] More specifically, the outer side wall of the column 31 is provided with a sliding groove 36, the sliding groove 36 is fixedly provided with a sliding rod 37, the sliding rod 37 is slidingly provided with a sliding block 38 matched with the sliding groove 36, and the outer side wall of the sliding block 38 is fixedly connected with the blade 34 through a screw. In use, when the blade 34 moves on the column 31, the sliding block 38 slides on the sliding rod 37, and the sliding groove 36 limits the sliding block 38, so as to ensure the stability of both ends of the blade 34 and prevent the blade 34 from shaking during cutting, thereby improving the cutting quality.

[0028] Further, the outer side wall of the column 31 away from the connecting frame 32 is fixedly provided with an abutting plate 39, and the abutting plate 39 is fixedly provided with a pressure sensor module 310 electrically connected with the control end of the double-screw extruder body 1. In use, after the output end of the cylinder 33 drives the blade 34 to cut the plastic strip and then moves down by a small distance, the pressure sensor module 310 on the abutting plate 39 is touched, the control end of the double-screw extruder body 1 receives the signal to stop feeding, so as to avoid the plastic strip from continuing to be extruded and accumulated between the inner side wall of the blade 34 and the discharge frame body 2, thereby ensuring the discharge quality, and when the blade 34 retreats, the feeding is continued, which is stable and reliable and avoids material jamming.

[0029] Embodiment 2

[0030] Different from embodiment 1, in the process of continuously cutting and extruding the plastic pipe, a part of the plastic mucilage that is not completely cooled may be attached to the blade 34, which affects the sharpness of the cutting after cooling. Therefore, the cutting mechanism further comprises a scraper 4 fixedly installed between the two columns 31, the scraper 4 is arranged on the column 31 close to the connecting frame 32, and the outer side wall of the scraper 4 is in abutting arrangement with the inner side wall of the blade 34. In use, when the cylinder 33 retracts the blade 34 through the output end, the plastic mucilage attached to the blade edge of the blade 34 is scraped off from the inside by the scraper 4, so as to ensure that the blade edge of the inner side wall of the blade 34 is not completely covered, thereby ensuring that the blade 34 has stable sharpness during cutting and ensuring stable cutting.

[0031] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and concept of the present application, can make equivalent replacements or changes within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An automatic cutting mechanism of a discharge port of a double screw extruder, comprising a double screw extruder body (1), a discharge frame body (2) fixedly installed on the output end of the double screw extruder body (1), and a cutting assembly (3) fixedly installed on the discharge frame body (2), characterized in that: the cutting assembly (3) comprises two symmetrically arranged vertical columns (31) fixedly installed on the discharge frame body (2), the outer side walls of the two vertical columns (31) are horizontally arranged with the outer side wall of the discharge frame body (2), a connecting frame (32) is fixedly installed on the two vertical columns (31), a pneumatic cylinder (33) is fixedly installed on the connecting frame (32), a blade (34) is fixedly installed on the output end of the pneumatic cylinder (33), and the inner side wall of the blade (34) is arranged in close contact with the outer side wall of the vertical column (31).

2. The automatic cutting mechanism of the discharge port of a double screw extruder according to claim 1, characterized in that: A clamping piece (311) is fixedly installed on the outer side wall of the pneumatic cylinder (33) and welded with the connecting frame (32), a connecting block (35) is fixedly installed on the outer side wall of the blade (34), the output end of the pneumatic cylinder (33) is inserted into the connecting block (35), and nuts are screwed on the output end of the pneumatic cylinder (33) at both ends of the connecting block (35).

3. The automatic cutting mechanism of the discharge port of a double screw extruder according to claim 1, characterized in that: A sliding groove (36) is formed in the outer side wall of the vertical column (31), a sliding rod (37) is fixedly installed in the sliding groove (36), a sliding block (38) matched with the sliding groove (36) is slidingly installed on the sliding rod (37), and the outer side wall of the sliding block (38) is fixedly connected with the blade (34) by screws.

4. The automatic cutting mechanism of the discharge port of a double screw extruder according to claim 1, characterized in that: A stop plate (39) is fixedly installed on the outer side wall of the vertical column (31) away from the connecting frame (32), and a pressure sensor module (310) electrically connected with the control end of the double screw extruder body (1) is fixedly installed on the stop plate (39).

5. The automatic cutting mechanism of the discharge port of a twin-screw extruder according to claim 1, characterized in that: The cutting mechanism further comprises a scraper (4) fixedly installed between the two vertical columns (31), the scraper (4) is arranged on the vertical column (31) close to the connecting frame (32), and the outer side wall of the scraper (4) is arranged in close contact with the inner side wall of the blade (34).

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