Forming machine suitable for PVC-U double-wall corrugated pipe

Abstract

The forming machine comprises a screw extruder and an extrusion die, the screw extruder comprises a machine body, one end of the machine body is open and communicated with a square installation box, the end, away from the machine body, of the installation box is open, and electric push rods are arranged on the upper side and the lower side of the installation box respectively. The telescopic end of the electric push rod faces the mounting box and is fixedly connected with a first motor, an output shaft of the first motor faces the mounting box and is fixedly connected with an external threaded column, an internal threaded through hole is formed in the side portion, corresponding to the external threaded column, of the mounting box, a plugging plate is inserted into the mounting box in a sleeved mode, and internal threaded blind holes are formed in the positions, corresponding to the internal threaded through hole, of the plugging plate. The outer threaded columns can be screwed into the corresponding inner threaded through holes and the inner threaded blind holes, a second motor is arranged in the center of the side, away from the machine body, of the plugging plate, and an output shaft of the second motor extends into the machine body and is coaxially and fixedly connected with a screw. According to the utility model, the screw rod can be conveniently disassembled and assembled, two-stage flow regulation during flow division can be realized, and the valve is more practical.

Description

Technical Field

[0001] The utility model belongs to the technical field of corrugated pipe production, and particularly relates to a forming machine suitable for PVC-U double-wall corrugated pipes. Background Art

[0002] PVC-U double-wall corrugated pipe is a commonly used municipal pipeline with a unique structure, high strength, smooth inner wall, low friction resistance, large flow rate, no need for concrete foundation, light weight, easy transportation and installation, quick construction, and its rubber ring socket connection method is reliable, the construction quality is easy to ensure, with a flexible interface, strong resistance to uneven settlement, good anti-leakage effect, resistant to erosion by various chemical media, no scaling inside the pipe, basically no need for dredging, and buried service life of more than 50 years.

[0003] At present, in order to improve the strength of the pipe, when producing PVC-U double-wall corrugated pipes, companies usually add calcium carbonate particles modified with super-dispersed modifiers and calcium carbonate whisker composite fillers to achieve better reinforcement and toughening effects. The main production process includes material preparation, mixing, heating and plasticizing, extrusion molding, cooling, cutting, etc. Among them, a double-wall corrugated pipe forming machine is required for extrusion molding. The equipment generally includes a screw extruder and an extrusion die. The heated and plasticized material is transported and diverted to the inner wall extrusion channel and the outer wall extrusion channel of the extrusion die through the screw extruder, thereby cooperating to realize the extrusion molding process. However, in actual application, firstly, the screw of the screw extruder is difficult to disassemble and assemble, which makes it inconvenient to inspect, repair, clean and maintain it. Secondly, the flow rate during diversion is difficult to adjust, which affects the quality of extrusion molding and needs to be improved. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a molding machine suitable for PVC-U double-wall corrugated pipes, which can realize convenient disassembly and assembly of the screw and two-stage flow regulation during diversion to solve the above problems.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a forming machine suitable for PVC-U double-wall corrugated pipe, including a screw extruder and an extrusion mold, the screw extruder including a body, one end of the body is open and the end is fixedly connected to a square mounting box, the mounting box is open at one end away from the body, and an electric push rod is vertically fixed on the upper and lower sides of the mounting box, the telescopic end of the electric push rod faces the mounting box and is fixedly connected to the first motor, the output shaft of the first motor faces the mounting box and is coaxially fixedly connected to an externally threaded column, an internally threaded through hole is provided on the side of the mounting box corresponding to the externally threaded through hole, a blocking plate is inserted in the mounting box, and internally threaded blind holes are provided at positions on the blocking plate corresponding to the internally threaded through hole, the externally threaded column can be screwed into the corresponding internally threaded through hole and the internally threaded blind hole, and a second motor is fixedly mounted on the center of the side of the blocking plate away from the body. The output shaft of the second motor extends into the machine body and is coaxially fixedly connected to a screw, the top of the machine body near one end of the mounting box is connected to a feed pipe, and the other end is connected to a tee pipe, the other two ports of the tee pipe are connected to a delivery branch pipe, the tail end of one delivery branch pipe is connected to the inner wall extrusion channel on the extrusion die, and the tail end of the other delivery branch pipe is connected to the outer wall extrusion channel on the extrusion die, and the two delivery branches are connected to the melt pump and the adjusting cylinder, the adjusting cylinder is fixedly sleeved with a fixed disk, the fixed disk is fixedly provided with a protective cover at the center of one side of the machine body, and the protective cover is fixed with a third motor, the output shaft of the third motor passes through the fixed disk and is coaxially fixedly connected to the rotating disk, the rotating disk abuts against the fixed disk and is rotatably connected to the adjusting cylinder, the fixed disk is provided with a plurality of fixed through-slots, and the rotating disk is provided with a plurality of movable through-slots, the fixed through-slots and the movable through-slots are both fan-shaped and correspond one to one and can overlap and stagger.

[0006] Preferably, the blocking plate is compatible with the mounting box.

[0007] Preferably, the internally threaded through hole is matched with the corresponding internally threaded blind hole and both are matched with the corresponding externally threaded column.

[0008] Preferably, the fixed through slot is adapted to the corresponding movable through slot.

[0009] The beneficial effects of the present utility model are as follows: during the extrusion molding process, the heated and plasticized material can be fed into the body of the screw extruder through the feed pipe, and then the screw can be driven to rotate by the second motor, and the material can be driven forward by the screw to be transported to the tee pipe, and then the material can be diverted to the inner wall extrusion channel and the outer wall extrusion channel of the extrusion mold through the tee pipe and the two delivery branches, so as to cooperate to realize the extrusion molding process. During diversion, the melt pump on each delivery branch can play an effective role in boosting and stabilizing pressure, and can achieve a first-level regulation of the material flow of the corresponding delivery branch by adjusting the speed of the melt pump. At the same time, the third motor can be used to drive the rotation of the rotating disk to adjust the overlap of the movable through slot and the fixed through slot, thereby achieving a second-level regulation of the material flow of the corresponding delivery branch. In this way, two-stage flow regulation can be achieved during diversion, which is easy to operate and more conducive to ensuring the quality of extrusion molding;

[0010] After a period of use, when the screw assembly needs to be repaired or replaced, the electric push rod and the first motor can be operated while the machine is stopped. The first motor drives the externally threaded stud in reverse, while the telescopic end of the electric push rod retracts. This allows the externally threaded stud to be unscrewed from the corresponding internally threaded blind hole and internally threaded through hole, thereby releasing the screw connection to the blocking plate. The screw can then be withdrawn from the machine body, allowing the original blocking plate and screw to be removed for easy inspection, cleaning, and maintenance. Next, another set of blocking plates and screws can be obtained and inserted into the machine body until the blocking plate is properly inserted into the mounting box. The electric push rod and the first motor can then be operated again, causing the telescopic end of the electric push rod to extend and the first motor to drive the externally threaded stud in forward rotation. With these interactions, the externally threaded stud can be screwed into place in the corresponding internally threaded through hole and internally threaded blind hole, securing the blocking plate with screws. This completes the installation of the new blocking plate and screw, ensuring a secure installation that will not affect subsequent use. In this way, the screw can be easily disassembled and assembled, which is more conducive to its inspection, replacement, cleaning and maintenance. The overall use is more flexible, convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of the installation box of the utility model;

[0013] Figure 3 This is a left-side structural diagram of the installation box of the utility model;

[0014] Figure 4 This is a schematic diagram of the main structure of the blocking plate of the utility model;

[0015] Figure 5 This is a left-side structural schematic diagram of the utility model blocking plate;

[0016] Figure 6 This is a schematic diagram of the main structure of the utility model when the blocking plate is connected to the installation box;

[0017] Figure 7 This is a schematic diagram of the main structure of the adjustment tube of the utility model;

[0018] Figure 8 This is a left-side structural diagram of the fixed plate of the utility model;

[0019] Figure 9 It is a right side structural schematic diagram of the rotating disk of the utility model.

[0020] Numbers in the figure: 1 is a screw extruder, 2 is an extrusion die, 3 is a machine body, 4 is a mounting box, 5 is an electric push rod, 6 is a first motor, 7 is an externally threaded column, 8 is an internally threaded through hole, 9 is a blocking plate, 10 is an internally threaded blind hole, 11 is a second motor, 12 is a screw, 13 is a feed pipe, 14 is a three-way pipe, 15 is a conveying branch pipe, 16 is a melt pump, 17 is an adjusting cylinder, 18 is a fixed disk, 19 is a protective cover, 20 is a third motor, 21 is a rotating disk, 22 is a fixed through slot, and 23 is a movable through slot. DETAILED DESCRIPTION

[0021] The present invention is described in further detail below with reference to the accompanying drawings and specific embodiments:

[0022] like Figures 1 to 9As shown, a forming machine suitable for producing PVC-U double-wall corrugated pipe comprises a screw extruder 1 and an extrusion die 2. The screw extruder 1 includes a body 3, one end of which is open and fixedly connected to a square mounting box 4. The mounting box 4 is open on the end away from the body 3. Electric push rods 5 are vertically fixed on both the upper and lower sides of the mounting box 4. The telescopic ends of the electric push rods 5 face the mounting box 4 and are fixedly connected to a first motor 6. The output shaft of the first motor 6 faces the mounting box 4 and is coaxially fixedly connected to an externally threaded post 7. Internally threaded holes 8 are defined on the side of the mounting box 4 corresponding to the externally threaded post 7. A blocking plate 9 is inserted into the mounting box 4. Internally threaded blind holes 10 are defined on the blocking plate 9 at positions corresponding to the internally threaded holes 8. The externally threaded post 7 can be screwed into the corresponding internally threaded holes 8 and internally threaded blind holes 10. A second motor 11 is fixedly mounted on the center of the side of the blocking plate 9 away from the body 3. The output shaft of the second motor 11 extends into the body 3 and is coaxially fixedly connected to a screw 12. The top of one end of the body 3 near the mounting box 4 is connected to a feed pipe 13, and the other end is connected to a tee pipe 14. The other two ends of the tee pipe 14 are connected to delivery branches 15. The tail end of one delivery branch pipe 15 is connected to the inner wall extrusion channel of the extrusion die 2, and the tail end of the other delivery branch pipe 15 is connected to the outer wall extrusion channel of the extrusion die 2. Both delivery branches 15 are connected to a melt pump 16 and an adjustment cylinder 17. A fixed disk 18 is fixedly sleeved inside the adjustment cylinder 17. A protective cover 19 is fixedly installed on the center of the fixed disk 18 near the side of the body 3. A third motor 20 is fixed inside the protective cover 19. The output shaft of the third motor 20 passes through the fixed disk 18 and is coaxially fixedly connected to a rotating disk 21. The rotating disk 21 abuts against the fixed disk 18 and is rotationally connected to the adjustment cylinder 17. The fixed plate 18 is provided with a plurality of fixed slots 22, and the rotating plate 21 is provided with a plurality of movable slots 23. The fixed slots 22 and the movable slots 23 are both fan-shaped and correspond to each other one by one and can overlap or stagger.

[0023] During the extrusion molding process, the heated and plasticized material can be fed into the body 3 of the screw extruder 1 through the feed pipe 13, and then the screw 12 can be driven to rotate by the second motor 11, and the material can be driven forward and transported to the tee 14 by the screw 12. Then, the material is diverted to the inner wall extrusion channel and the outer wall extrusion channel of the extrusion mold 2 through the tee 14 and the two delivery branches 15, and the extrusion molding process can be realized in combination. During diversion, the melt pump 16 on each delivery branch 15 can play an effective role in boosting and stabilizing pressure, and can achieve a first-level regulation of the material flow of the corresponding delivery branch 15 by adjusting the rotation speed of the melt pump 16. At the same time, the third motor 20 can be used to drive the rotation of the rotating disk 21 to adjust the overlap between the movable through slot 23 and the fixed through slot 22, thereby achieving a second-level regulation of the material flow of the corresponding delivery branch 15. In this way, two-stage flow regulation can be achieved during diversion, which is easy to operate and more conducive to ensuring the quality of extrusion molding.

[0024] After using for a period of time, when the screw 12 needs to be repaired and replaced, the electric push rod 5 and the first motor 6 can be operated in the shutdown state, and the external thread column 7 can be reversed by the first motor 6. At the same time, the telescopic end of the electric push rod 5 can be retracted to unscrew the external thread column 7 from the corresponding internal thread blind hole 10 and the internal thread through hole 8, thereby releasing the screw connection of the blocking plate 9, and then pulling out the screw 12 from the body 3. The original blocking plate 9 and screw 12 can be disassembled to facilitate their inspection, cleaning and maintenance. Then, another set of blocking plates 9 and screw 12 can be taken out, and the screw 12 can be inserted into the body 3 first until the blocking plate 9 is inserted into the installation box 4. Then, the electric push rod 5 and the first motor 6 are operated again, so that the telescopic end of the electric push rod 5 is extended and the external threaded column 7 is driven to rotate forward by the first motor 6. Under the cooperation, the external threaded column 7 can be screwed into place in the corresponding internal threaded through hole 8 and the internal threaded blind hole 10, and the blocking plate 9 is screwed and fixed. The installation of the new blocking plate 9 and the screw 12 is completed, and the installation is stable and does not affect subsequent use. In this way, the screw 12 can be easily disassembled and assembled, which is more conducive to its inspection, replacement, cleaning and maintenance, making the overall use more flexible, convenient and practical.

[0025] In this embodiment, the blocking plate 9 is matched with the installation box 4 to ensure that the blocking plate 9 is installed in place smoothly.

[0026] In this embodiment, the internal threaded through hole 8 is matched with the corresponding internal threaded blind hole 10 and both are matched with the corresponding external threaded column 7 to ensure that the external threaded column 7 is smoothly screwed into place.

[0027] In this embodiment, the fixed through slots 22 are matched with the corresponding movable through slots 23 to ensure smooth passage of materials.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A molding machine suitable for PVC-U double-wall corrugated pipes, comprising a screw extruder and an extrusion die, characterized in that: The screw extruder comprises a body, one end of the body is open and the end is fixedly connected to a square mounting box, the mounting box is open at one end away from the body, and electric push rods are vertically fixed on the upper and lower sides of the mounting box, the telescopic end of the electric push rod faces the mounting box and is fixedly connected to the first motor, the output shaft of the first motor faces the mounting box and is coaxially fixedly connected to an externally threaded column, an internally threaded through hole is provided on the side of the mounting box corresponding to the externally threaded through hole, a blocking plate is inserted into the mounting box, and internally threaded blind holes are provided at positions on the blocking plate corresponding to the internally threaded through hole, the externally threaded column can be screwed into the corresponding internally threaded through hole and the internally threaded blind hole, a second motor is fixedly mounted on the center of the side of the blocking plate away from the body, the output shaft of the second motor extends into the body and is coaxially fixedly connected to the screw, the body The top near one end of the mounting box is connected to a feed pipe, and the other end is connected to a tee pipe, and the other two ends of the tee pipe are connected to a delivery branch pipe, the tail end of one delivery branch pipe is connected to the inner wall extrusion channel on the extrusion die, and the tail end of the other delivery branch pipe is connected to the outer wall extrusion channel on the extrusion die, and the two delivery branches are connected to a melt pump and an adjusting cylinder, a fixed sleeve is provided in the adjusting cylinder, a protective cover is fixedly provided on the center of one side of the fixed disk close to the body, a third motor is fixed in the protective cover, the output shaft of the third motor passes through the fixed disk and is coaxially fixedly connected to a rotating disk, the rotating disk abuts against the fixed disk and is rotatably connected to the adjusting cylinder, a plurality of fixed through-slots are provided on the fixed disk, and a plurality of movable through-slots are provided on the rotating disk, the fixed through-slots and the movable through-slots are both fan-shaped and correspond one to one and can overlap and stagger.

2. The forming machine for PVC-U double-wall corrugated pipe according to claim 1, characterized in that: The blocking plate is adapted to the installation box.

3. The forming machine for PVC-U double-wall corrugated pipe according to claim 1, characterized in that: The internal threaded through hole is matched with the corresponding internal threaded blind hole and both are matched with the corresponding external threaded column.

4. The forming machine for PVC-U double-wall corrugated pipe according to claim 1, characterized in that: The fixed through slot is matched with the corresponding movable through slot.

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