Plastic pipe shaping and extruding device

Abstract

The invention relates to the technical field of plastic pipe manufacturing, and discloses a plastic pipe shaping and extruding device which comprises a screw extruder, the screw extruder comprises a machine barrel, a screw, a motor and a transmission shaft connected with an output shaft of the motor and the screw, and a plurality of notches are formed in the inner wall of the machine barrel. Compared with the prior art, the screw cleaning device has the following advantages and effects that after a screw and a machine barrel are cleaned with a solid cleaning agent, the screw cleaning device is suitable for a single-screw extruder, a liquid cleaning agent is sprayed to the surface of the screw through the inner spraying holes, a liquid cleaning agent is sprayed to the inner wall of the machine barrel through the outer spraying holes, and the surface of the screw is brushed through the inner bristles of the half barrel bodies; and the inner wall of the machine barrel is brushed through the outer bristles, so that the effect of thoroughly cleaning the surface of the screw rod and the inner wall of the machine barrel under the condition that the screw rod is not disassembled is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipe manufacturing, in particular to a plastic pipe shaping extrusion device. Background Art

[0002] In the process of manufacturing plastic pipes, a shaping extrusion device is required to extrude and shape the raw materials. Among them, the most common one is the screw extruder. The screw extruder extrude, shear, stir and stably convey the raw materials through the screw, so that the raw materials pass through the die to obtain a hollow plastic pipe. The plastic pipe is cut into the required length after cooling and shaping. In the prior art, there are mainly the following cleaning methods. One is to clean after disassembling the screw. After the screw extruder is used, stop the operation of the screw extruder, wait for the screw to cool to a suitable temperature, remove the screw from the barrel, use tools such as steel brushes or plastic brushes, and use liquid cleaning agents to remove the residual materials on the screw. The second is to use a solid cleaning agent mixed with resin, which foams under the action of the screw, high temperature, additives, etc. The foamed solid cleaning agent contacts the surface of the screw and is discharged from the barrel under the rotation of the screw. The inner wall of the barrel and the surface of the screw can be cleaned without disassembling the screw, but the solid cleaning agent does not contact the dirt on the surface of the screw sufficiently, and the cleaning is not thorough enough. Summary of the invention

[0003] The invention aims to provide a plastic pipe shaping extrusion device, which has the effect of thoroughly cleaning the screw and the barrel without disassembling the screw during cleaning.

[0004] The above technical purpose of the present invention is achieved through the following technical solutions: a plastic pipe shaping extrusion device, including a screw extruder, the screw extruder includes a barrel, a screw, a motor, and a transmission shaft connecting the motor output shaft and the screw, the inner wall of the barrel is provided with a plurality of notches, the notches are opened along the axial direction of the barrel, the side wall of one end of the barrel is provided with a disassembly opening and a cover plate for sealing the disassembly opening, two semi-cylinders are arranged in the barrel, the semi-cylinders are provided with a slider embedded in the notch, the two semi-cylinders are connected by fastening bolts, the inner wall of the semi-cylinder is provided with inner bristles, and the plastic pipe shaping extruder also includes a driving mechanism for driving the semi-cylinder to move in the barrel.

[0005] By adopting the above technical solution, after the production of the screw extruder is completed, the screw surface and the inner wall of the barrel are cleaned once with a solid cleaning agent. In view of the problem that the solid cleaning agent is not thorough enough, the present invention performs secondary cleaning, first dismantling the cover plate to open the disassembly port, putting the two half-barrels into the barrel from the disassembly port, so that the sliders on the half-barrels are embedded in the notches on the inner wall of the barrel, and then the two half-barrels are connected and fixed with fastening bolts. The driving mechanism drives the half-barrel to move in the barrel along the length direction of the notch, and the inner bristles on the inner wall of the half-barrel are used to brush the surface of the screw.

[0006] The present invention is further configured as follows: the outer wall of the semi-cylinder is provided with outer bristles.

[0007] By adopting the above technical solution, the outer bristles are used to brush the inner wall of the barrel.

[0008] The present invention is further configured as follows: it includes a frame, the driving mechanism includes a gear ring that rotates due to the force of the transmission shaft, a rotatable first shaft, a rotatable second shaft, a guide hole opened in the frame, a sliding rod slidably inserted in the guide hole, and a rack fixed on the sliding rod, the first shaft is fixed with a first gear and a second gear, the second shaft is fixed with a third gear and a fourth gear, the first gear is meshed with the gear ring, the second gear is meshed with the third gear, and the fourth gear is meshed with the rack, an opening and closing port and an opening and closing door for closing the opening are opened at the end of the barrel, and one end of the sliding rod is connected to the semi-cylinder after passing through the opening and closing port.

[0009] By adopting the above technical solution, the transmission shaft is used to transmit power to the screw to rotate it. The gear ring of the driving mechanism of the present invention is connected to the transmission shaft. The rotation of the transmission shaft drives the gear ring to rotate, and in turn drives the first rotating shaft. The second rotating shaft rotates, which in turn drives the sliding rod to slide, and the sliding rod drives the semi-cylinder to rotate. At this time, the transmission shaft is controlled to rotate forward or reverse, which can drive the semi-cylinder to move back and forth in the barrel.

[0010] The present invention is further configured as follows: there are a plurality of the first rotating shaft, the second rotating shaft, and the sliding rod, and each of the semi-cylinders is connected to at least one sliding rod.

[0011] By adopting the above technical solution, the force applied to the semi-cylinder during movement in the barrel is made more uniform.

[0012] The present invention is further configured as follows: a threaded barrel is threadedly connected to the sliding rod, a threaded column is fixed to the semi-cylinder, and the threaded column is threadedly connected to the threaded barrel.

[0013] By adopting the above technical solution, the connection and fixation between the semi-cylinder body and the sliding rod is achieved through the threaded cylinder.

[0014] The present invention is further configured as follows: a flow channel is formed at the end of the sliding rod, the threaded column is hollow and inserted in the flow channel, a chamber is formed in the semi-cylinder, the hollow threaded column connects the flow channel with the chamber, the inner wall of the semi-cylinder is provided with an inner spray hole connected to the chamber, and the outer wall of the semi-cylinder is provided with an outer spray hole connected to the chamber.

[0015] By adopting the above technical solution, the flow channel is connected through a hose, liquid cleaning fluid is supplied to the flow channel and the chamber, and the inner and outer bristles of the brush are used for brushing, so that the screw can be thoroughly cleaned without disassembling.

[0016] The present invention is further configured as follows: the cross-section of the sliding rod and the cross-section of the guide hole are rectangular, guide grooves are provided on the side walls on both sides of the sliding rod, first guide blocks are fixed to the inner walls on both sides of the guide hole, and the first guide blocks are embedded in the guide grooves; the plastic pipe shaping extrusion device includes a bracket, and the bracket is provided with a plurality of second guide blocks, and the second guide blocks are embedded in the guide grooves.

[0017] The present invention is further configured as follows: the driving mechanism also includes a rotating drum rotatably connected to the frame, a transmission bolt that passes through the rotating drum and is threadedly connected to the transmission shaft, and a plurality of connecting rods, wherein both ends of the connecting rods are respectively fixed to the outer wall of the rotating drum and the inner wall of the gear ring.

[0018] By adopting the above technical solution, the transmission bolt is rotated and removed, and the rotation of the transmission shaft will not drive the drum and the gear ring to rotate, and the extrusion molding operation can be carried out normally. When it is necessary to use the inner and outer brushes of the semi-cylinder to brush the surface of the screw and the inner wall of the barrel, the transmission bolt is tightened on the transmission shaft in advance so that the rotation of the transmission shaft can drive the drum and the gear ring to rotate.

[0019] The present invention is further configured as follows: the number of the notches is four, and two sliding blocks are fixed on each of the semi-cylinders.

[0020] By adopting the above technical solution, the slot has at least the following two functions: first, as an axial straight slot, it increases the friction between the barrel surface and the material and improves the conveying efficiency; second, it limits and guides the movement of the slider and the semi-cylinder during cleaning operations.

[0021] The beneficial effect of the present invention is that after the screw and the barrel are cleaned with a solid cleaning agent, the present invention is suitable for a single-screw extruder, and the liquid cleaning agent is sprayed on the surface of the screw through the inner spray hole, and the liquid cleaning agent is sprayed on the inner wall of the barrel through the outer spray hole, and the screw surface is brushed by the inner bristles of the semi-cylinder body, and the inner wall of the barrel is brushed by the outer bristles, thereby achieving the effect of thoroughly cleaning the screw surface and the inner wall of the barrel without disassembling the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the positional relationship between the barrel and the cover plate of the present invention.

[0025] Figure 3 It is a schematic diagram of the positional relationship between the barrel and the disassembly port of the present invention.

[0026] Figure 4 It is a schematic diagram of the semi-cylinder structure of the present invention.

[0027] Figure 5 It is a schematic diagram of the positional relationship between the barrel and the opening and closing door of the present invention.

[0028] Figure 6 yes Figure 5 Enlarged view of point B.

[0029] Figure 7 It is a schematic diagram of the barrel structure of the present invention.

[0030] Figure 8 yes Figure 7 Enlarged view of point C.

[0031] Fig. 9 yes Figure 1 Enlarged view of point A.

[0032] Fig.10 It is a schematic diagram of the driving mechanism structure of the present invention.

[0033] Fig.11 It is a schematic diagram of the guide hole structure of the present invention.

[0034] Fig.12 It is a schematic diagram of the positional relationship between the bracket and the sliding rod of the present invention.

[0035] Fig.13 yes Fig.12 Enlarged view of point D.

[0036] In the figure, 1, frame; 11, guide hole; 12, first guide block; 2, barrel; 21, cover plate; 22, disassembly port; 23, opening and closing door; 24, opening and closing port; 3, screw; 4, motor; 5, transmission shaft; 6, driving mechanism; 61, rotating drum; 62, transmission bolt; 63, connecting rod; 64, gear ring; 65, first rotating shaft; 651, first gear; 652, second gear; 66, second rotating shaft; 661, third gear; 662, fourth gear; 67, sliding rod; 671, threaded barrel; 672, guide groove; 68, rack; 7, semi-cylinder; 71, inner bristles; 72, outer bristles; 73, inner spray hole; 74, outer spray hole; 75, threaded column; 76, slider; 77, fastening bolt; 8, bracket; 9, second guide block. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] A plastic pipe shaping extrusion device, such as Figures 1 to 13 As shown, it includes a screw 3 extruder and a vacuum cooling and shaping device. The screw 3 extruder is a single screw 3 extruder, including a frame 1, a barrel 2, a screw 3, a transmission shaft 5, and a motor 4. The screw 3 is located in the barrel 2 and has a spiral blade fixed thereon. One end of the transmission shaft 5 is connected to the output shaft of the motor 4, and the other end is connected to the screw 3. The motor 4 can drive the screw 3 to rotate through the transmission shaft 5.

[0039] The side wall at one end of the barrel 2 is provided with a disassembly port 22 and a cover plate 21. The cover plate 21 is fixed to the barrel 2 by bolts, and the disassembly port 22 can be sealed. The inner wall of the barrel 2 is provided with slots along the axial direction, and the number of slots is four. The plastic pipe extrusion device also includes two semi-cylinders 7. When the screw 3 extruder is extruding and molding, the semi-cylinders 7 are placed outside the barrel 2. When it is necessary to clean the surface of the screw 3 and the inner wall of the barrel 2, the cover plate 21 is removed, and the two semi-cylinders 7 are placed inside the barrel 2 from the disassembly port 22. Two sliders 76 are fixed to the outer wall of each semi-cylinder 7, and the four sliders 76 are respectively embedded in the four slots, so that the semi-cylinder 7 can slide in the barrel 2. The two semi-cylinders 7 are connected and fixed by fastening bolts 77 and fastening nuts. The inner wall of the semi-cylinder 7 is provided with inner bristles 71 for brushing the surface of the screw 3. The outer wall of the semi-cylinder 7 is fixed with outer bristles 72 for brushing the inner wall of the barrel 2.

[0040] The plastic pipe shaping extrusion device also includes a driving mechanism 6, which is used to drive the semi-cylinder 7 to reciprocate in the barrel 2. The driving mechanism 6 includes a rotating drum 61 and a transmission bolt 62 that are rotatably connected to the frame 1. The rotating drum 61 is sleeved on the transmission shaft 5. The side wall of the rotating drum 61 is provided with a through hole. The transmission bolt 62 passes through the through hole and is threadedly connected to the transmission shaft 5. When the transmission screw is disassembled, the rotating drum 61 cannot be driven to rotate when the motor 4 drives the transmission shaft 5 to rotate. When the transmission bolt 62 is installed, the rotating drum 61 can be driven to rotate when the motor 4 drives the transmission shaft 5 to rotate.

[0041] The driving mechanism 6 also includes a gear ring 64, a first rotating shaft 65, a second rotating shaft 66, a guide hole 11 provided in the frame 1, a sliding rod slidably inserted in the guide hole 11, and a rack 68 fixed to the sliding rod 67. The first rotating shaft 65 and the second rotating shaft 66 are both rotatably connected to the frame 1. The gear ring 64 is fixed to the rotating drum 61 through a plurality of connecting rods 63. The first rotating shaft 65 is fixed with a first gear 651 and a second gear 652. The second rotating shaft 66 is fixed with a third gear 661 and a fourth gear 662. The first gear 651 meshes with the gear ring 64, the second gear 652 meshes with the third gear 661, the second gear 652 and the third gear 661 are both bevel gears, the fourth gear 662 meshes with the rack 68, the end of the barrel 2 is provided with an opening and closing port 24 and an opening and closing door 23 for closing the opening and closing port 24, when it is necessary to clean the inner wall of the barrel 2 and the surface of the screw 3, the opening and closing door 23 is opened, and one end of the sliding rod 67 passes through the opening and closing port 24 and is connected to the semi-cylinder 7. The cross-section of the sliding rod 67 and the cross-section of the guide hole 11 are rectangular. The inner walls on both sides of the guide hole 11 are fixed with a first guide block 12, and the first guide block 12 is embedded in the guide groove 672; the plastic pipe shaping extrusion device includes a bracket 8, and the bracket 8 is provided with a plurality of second guide blocks 9, and the second guide blocks 9 are embedded in the guide groove 672

[0042] A threaded cylinder 671 is threadedly connected to the sliding rod 67, and a threaded column 75 is fixed to the semi-cylinder body 7. The threaded cylinder 671 is threadedly connected to the threaded column 75, so as to fix the sliding rod 67 and the semi-cylinder body 7.

[0043] A flow channel is formed in the sliding rod 67, and a hose is connected to the flow channel. A pump is installed on the hose. One end of the hose is placed in a container, and the container contains liquid cleaning fluid. The threaded column 75 is hollow and inserted in the flow channel. A chamber is formed in the semi-cylinder 7. The hollow threaded column 75 connects the flow channel with the chamber. The inner wall of the semi-cylinder 7 is provided with an inner spray hole 73 connected to the chamber, and the outer wall of the semi-cylinder 7 is provided with an outer spray hole 74 connected to the chamber.

[0044] Working principle: After the production of the screw 3 extruder is completed, the surface of the screw 3 and the inner wall of the barrel 2 are cleaned once with a solid cleaning agent. In view of the problem that the solid cleaning agent is not thorough enough, the present invention performs secondary cleaning, first dismantling the cover plate 21 to open the disassembly port 22, and putting the two half-barrels 7 into the barrel 2 from the disassembly port 22, so that the slider 76 on the half-barrel 7 is embedded in the notch of the inner wall of the barrel 2, and then the two half-barrels 7 are connected and fixed with the fastening bolts 77. Then install the transmission bolt 62, the motor 4 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the rotating drum 61, the gear ring 64, the first rotating shaft 65, and the second rotating shaft 66 to rotate, and then drives the sliding rod 67 to move. During the cleaning operation, the motor 4 rotates forward, reverses, rotates forward again, and reverses again in sequence to realize the reciprocating movement of the semi-cylinder 7 in the barrel 2, and the pump starts to move to provide liquid cleaning liquid. The inner spray hole 73 sprays liquid cleaning liquid onto the screw 3, and the outer spray hole 74 sprays liquid cleaning agent on the inner wall of the barrel 2. The inner bristles 71 of the semi-cylinder 7 brush the surface of the screw 3, and the outer bristles 72 brush the inner wall of the barrel 2, thereby achieving the effect of thoroughly cleaning the surface of the screw 3 and the inner wall of the barrel 2 without disassembling the screw 3.

Claims

1. A plastic pipe shaping extrusion device, comprising a screw (3) extruder, wherein the screw (3) extruder comprises a barrel (2), a screw (3), a motor (4), and a transmission shaft (5) connecting an output shaft of the motor (4) and the screw (3), characterized in that: The inner wall of the barrel (2) is provided with a plurality of notches, the notches being provided along the axial direction of the barrel (2); a disassembly opening (22) and a cover plate (21) sealing the disassembly opening (22) are provided on the side wall at one end of the barrel (2); two semi-cylinders (7) are arranged in the barrel (2); the semi-cylinders (7) are provided with a sliding block (76) embedded in the notches; the two semi-cylinders (7) are connected by a fastening bolt (77); the inner wall of the semi-cylinders (7) is provided with inner bristles (71); and the plastic pipe shaping extruder further comprises a driving mechanism (6) for driving the semi-cylinders (7) to move in the barrel (2).

2. A plastic pipe shaping extrusion device according to claim 1, characterized in that: The outer wall of the semi-cylinder (7) is provided with outer bristles (72).

3. A plastic pipe shaping extrusion device according to claim 1, characterized in that: The invention comprises a frame (1), wherein the driving mechanism (6) comprises a gear ring (64) which is rotated by the transmission shaft (5), a rotatable first rotating shaft (65), a rotatable second rotating shaft (66), a guide hole (11) provided in the frame (1), a sliding rod (67) slidably inserted in the guide hole (11), and a rack (68) fixed on the sliding rod (67); the first rotating shaft (65) is fixed with a first gear (651) and a second gear (652); the second rotating shaft (66) A third gear (661) and a fourth gear (662) are fixed on it, the first gear (651) is meshed with the gear ring (64), the second gear (652) is meshed with the third gear (661), and the fourth gear (662) is meshed with the rack (68). An opening and closing port (24) and an opening and closing door (23) for closing the opening and closing port (24) are provided at the end of the barrel (2), and one end of the sliding rod (67) passes through the opening and closing port (24) and is connected to the semi-cylinder (7).

4. A plastic pipe shaping extrusion device according to claim 3, characterized in that: The first rotating shaft (65), the second rotating shaft (66), and the sliding rod (67) are multiple in number, and each of the semi-cylinder bodies (7) is connected to at least one sliding rod (67).

5. A plastic pipe shaping extrusion device according to claim 3, characterized in that: The sliding rod (67) is threadedly connected with a threaded cylinder (671), and the semi-cylinder body (7) is fixed with a threaded column (75), and the threaded column (75) is threadedly connected inside the threaded cylinder (671).

6. A plastic pipe shaping extrusion device according to claim 5, characterized in that: A flow channel is formed at the end of the sliding rod (67), the threaded column (75) is hollow and inserted into the flow channel, a chamber is formed in the semi-cylinder (7), the hollow threaded column (75) connects the flow channel with the chamber, the inner wall of the semi-cylinder (7) is provided with an inner spray hole (73) connected to the chamber, and the outer wall of the semi-cylinder (7) is provided with an outer spray hole (74) connected to the chamber.

7. A plastic pipe shaping extrusion device according to claim 3, characterized in that: The cross-sections of the sliding rod (67) and the guide hole (11) are rectangular. Guide grooves (672) are provided on the side walls of the sliding rod (67). First guide blocks (12) are fixed on the inner walls of the guide holes (11). The first guide blocks (12) are embedded in the guide grooves (672). The plastic pipe shaping extrusion device includes a bracket (8). The bracket (8) is provided with a plurality of second guide blocks (9). The second guide blocks (9) are embedded in the guide grooves (672).

8. A plastic pipe shaping extrusion device according to claim 3, characterized in that: The driving mechanism (6) further comprises a rotating drum (61) rotatably connected to the frame (1), a transmission bolt (62) passing through the rotating drum (61) and then threadedly connected to the transmission shaft (5), and a plurality of connecting rods (63), wherein the two ends of the connecting rods (63) are respectively fixed to the outer wall of the rotating drum (61) and the inner wall of the gear ring (64).

9. A plastic pipe shaping extrusion device according to claim 1, characterized in that: There are four notches, and two sliding blocks (76) are fixed on each of the semi-cylinder bodies (7).

Images