Double-wall corrugated pipe extruder

Abstract

An electric appliance cabinet is installed on a machine frame under a screw rod, a motor is fixedly installed on the top of the electric appliance cabinet, the motor is connected with a gear box through a coupler, the driving direction of the motor is opposite to the flowing direction of materials on the screw rod, the screw rod is connected with the gear box, and a hopper is installed over a feeding section of the screw rod. The screw rod is installed inside the machine barrel, the machine head is installed at the front end of the screw rod through the machine head connecting body, the screw rod is sequentially provided with a feeding section, a plasticizing section and an extruding section in the material flowing direction, the feeding section and the extruding section are provided with one stirring spiral line, and the plasticizing section is provided with two stirring spiral lines. The electric appliance cabinet has the advantages that the electric appliance cabinet and the rack are combined into a whole, so that the space utilization rate is increased; the screw structure is simplified, a pin head is omitted, meanwhile, the length of each section of screw is shortened, and maintenance and manufacturing are facilitated; the quick and effective conveying of the added material is ensured, the retention time is shortened, the efficient and low-temperature plasticizing of the material is accelerated, and the yield is increased; the machine body height is adjustable.

Description

Technical Field

[0001] The utility model relates to a double-wall corrugated pipe extruder, in particular to a double-wall corrugated pipe extruder suitable for high-speed production, belonging to the field of machinery. Background Art

[0002] Double-wall corrugated pipe is a new type of lightweight pipe that saves energy. It has the advantages of small specific gravity, low cost, resistance to external pressure, high strength, good resistance to mechanical vibration and freezing, and long service life. Its production technology has been developed and matured in the early 1990s.

[0003] The corrugated tube extruder is a key equipment for plastic extrusion molding. It is one of the key equipment for plasticizing and extruding plastic particles through external heating and extrusion pressure. It has the characteristics of high plasticizing rate, uniform melt, and continuous and stable production. The screw extruder can concentrate a series of basic chemical unit processes, such as solid conveying, pressurization, melting, exhaust, dehumidification, melt-based conveying and pumping, on the screw inside the extruder, which is why it is widely used.

[0004] The existing corrugated pipe extruder occupies a large area, is not suitable for factories with limited space, and has low screw transmission efficiency.

[0005] An extruder is now needed to solve the problem of large floor space. Utility Model Content

[0006] The utility model aims at the deficiencies of the prior art and provides a double-wall corrugated pipe extruder with a simple structure, which can solve the problem that the prior extruder occupies a large area.

[0007] This double-wall corrugated pipe extruder has an electrical cabinet installed on a frame directly below the screw, a motor fixedly installed on the top of the electrical cabinet, the motor is connected to a gear box through a coupling, the driving direction of the motor is opposite to the material flow direction of the screw, the screw is connected to the gear box, the hopper is installed directly above the feeding section of the screw, the screw is installed inside the barrel, the head is installed at the front end of the screw through a head connector, the screw is sequentially arranged as a feeding section, a plasticizing section, and an extrusion section along the material flow direction, one stirring spiral is arranged in the feeding section and the extrusion section, and two stirring spirals are arranged in the plasticizing section.

[0008] The hopper is fixed to the barrel of the feeding section by bolts, the bottom plate and the pressing plate are pressed on the mounting seat of the hopper, the bolts pass through the bottom plate and the pressing plate to fix the hopper on the barrel, and a gasket is arranged between the bottom plate and the barrel.

[0009] One end of the feeding section of the screw is connected to the screw ejection shaft, and the other end of the screw ejection shaft passes through the gear box.

[0010] The barrel between the extrusion section of the screw and the die head is supported by a support frame, the bottom of the support frame is installed on the frame, and the height of the support frame is determined by the height of the motor.

[0011] The material flow channel of the machine head is tilted downward, and the included angle between the material flow channel and the central axis of the screw is 120-135 degrees, which is more conducive to the transportation of materials.

[0012] The hopper is provided with an observation window for observing the falling conditions of the pipe material.

[0013] A foot is installed under the electrical cabinet, and the foot is connected to the electrical cabinet by a lead screw. The electrical cabinet can move up and down on the lead screw to adjust the height of the extruder body.

[0014] The utility model has the advantages that:

[0015] 1. The electrical cabinet and the rack are combined into one, which increases the space utilization;

[0016] 2. The equipment is mechatronic, effectively avoiding load operation;

[0017] 3. The screw structure is simplified, the pin head is eliminated, and the length of each screw section is shortened, which is conducive to maintenance and manufacturing;

[0018] 4. Ensure the rapid and effective transportation of added materials, reduce residence time, accelerate the efficient and low-temperature plasticization of materials, and increase production;

[0019] 5. The friction coefficient of the inner wall of the barrel is low and the conveying efficiency is high;

[0020] 6. The height of the machine body is adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a double-wall corrugated pipe extruder.

[0022] Figure 2 for Figure 1 VV view of the .

[0023] Figure 3 This is a schematic diagram of the machine head connection structure.

[0024] Markings in the figure: 1-electrical cabinet, 2-frame, 3-screw, 4-coupling, 5-gear box, 6-hopper, 7-barrel, 8-machine head, 9-bottom plate, 10-pressing plate, 11-screw ejector shaft, 12-support frame, 13-machine head connector, 14-foot, 15-screw, 16-motor, 17-observation window, 18-material flow channel, A-feeding section, B-plasticizing section, C-extrusion section. DETAILED DESCRIPTION

[0025] The double-wall corrugated pipe extruder is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2 As shown, this double-wall corrugated pipe extruder, this double-wall corrugated pipe extruder, the electrical cabinet 1 is installed on the frame 2 just below the screw 3, the motor 16 is fixedly installed on the top of the electrical cabinet 1, the motor 16 is connected to the gear box 5 through the coupling 4, the driving direction of the motor 16 is opposite to the material flow direction of the screw 3, the setting of the motor 16 changes the original transmission direction, and at the same time realizes the miniaturization of the extruder and reduces the volume of the extruder; the screw 3 is connected to the gear box 5, the hopper 6 is installed just above the feeding section of the screw 3, the hopper 6 is fixed to the barrel 7 of the feeding section by bolts, the bottom plate 9 and the pressure plate 10 are pressed on the mounting seat of the hopper 6, the bolts pass through the bottom plate 9 and the pressure plate 10 to fix the hopper 6 on the barrel 7, and a gasket is set between the bottom plate 9 and the barrel 7, and an observation window 17 is set on the hopper 6 for the falling condition of the pipe material. The screw 3 is installed inside the barrel 7, and the head 8 is installed at the front end of the screw 3 through the head connector 13. The screw 3 is sequentially arranged as a feeding section, a plasticizing section, and an extrusion section along the material flow direction. The feeding section and the extrusion section are provided with one stirring spiral line, and the plasticizing section is provided with two stirring spiral lines. The setting of the two stirring spiral lines in the plasticizing section improves the stirring efficiency, eliminates the pin head in the front, and reduces the volume of the extruder. Since the motor 16 is arranged below the screw 3, it is necessary to leave enough space below the screw 3, which causes a section of the screw 3 to be suspended. Therefore, the barrel 7 between the extrusion section of the screw 3 and the head 8 is supported by a support frame 12, and the bottom of the support frame 12 is installed on the frame 2. The height of the support frame 12 is determined by the height of the motor 16. A foot 14 is installed below the electrical cabinet 1, and the foot 14 is connected to the electrical cabinet 1 by a screw 15. The electrical cabinet 1 can move up and down on the screw 15 to adjust the height of the extruder body. In order to improve the stirring efficiency of the screw 3 , a heater is laid on the outside of the barrel 7 . Similarly, a heater is also laid on the outside of the material flow channel 18 of the die head 8 .

[0027] In order to facilitate the disassembly of the screw 3 , one end of the feeding section of the screw 3 is connected to the screw ejection shaft 11 , and the other end of the screw ejection shaft 11 passes through the gear box 5 .

[0028] Since the motor 16 is arranged below the screw 3, sufficient space needs to be left below the screw 3, which causes a section of the screw 3 to be suspended in the air. Therefore, the barrel 7 between the extrusion section of the screw 3 and the head 8 is supported by a support frame 12, and the bottom of the support frame 12 is installed on the frame 2. The height of the support frame 12 is determined by the height of the motor 16.

[0029] In order to make the material conveying more efficient, the material flow channel 18 of the die head 8 is tilted downward, and the angle between the material flow channel 18 and the central axis of the screw 3 is 120-135 degrees.

[0030] Working principle: the material enters from the hopper 6, is heated and melted by the feeding section of the screw 3, is further melted and fully stirred in the plasticizing section, and finally is extruded into the material flow channel 18 of the die head 8 through the extrusion section. Finally, the material is extruded out of the extruder through the material flow channel 18.

[0031] The above are specific embodiments of the present invention and the technical principles used. Any modification or equivalent transformation based on the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims

1. Double-wall corrugated pipe extruder, characterized by: The electrical cabinet is installed on the frame directly below the screw, the motor is fixedly installed on the top of the electrical cabinet, the motor is connected to the gear box through a coupling, the driving direction of the motor is opposite to the material flow direction of the screw, the screw is connected to the gear box, the hopper is installed directly above the feeding section of the screw, the screw is installed inside the barrel, the head is installed at the front end of the screw through the head connector, the screw is sequentially arranged as a feeding section, a plasticizing section, and an extrusion section along the material flow direction, the feeding section and the extrusion section are provided with one stirring spiral line, and the plasticizing section is provided with two stirring spiral lines.

2. The double-wall corrugated pipe extruder according to claim 1, characterized in that: The hopper is fixed to the barrel of the feeding section by bolts, the bottom plate and the pressing plate are pressed on the mounting seat of the hopper, the bolts pass through the bottom plate and the pressing plate to fix the hopper on the barrel, and a gasket is arranged between the bottom plate and the barrel.

3. The double-wall corrugated pipe extruder according to claim 1, characterized in that: One end of the feeding section of the screw is connected to the screw ejection shaft, and the other end of the screw ejection shaft passes through the gear box.

4. The double-wall corrugated pipe extruder according to claim 1, characterized in that: The barrel between the extrusion section of the screw and the die head is supported by a support frame, and the bottom of the support frame is installed on the frame.

5. The double-wall corrugated pipe extruder according to claim 1, characterized in that: The material flow channel of the die head is inclined downward, and the included angle between the material flow channel and the central axis of the screw is 120-135 degrees.

6. The double-wall corrugated pipe extruder according to claim 1, characterized in that: An observation window is arranged on the hopper.

7. The double-wall corrugated pipe extruder according to claim 1, characterized in that: A ground foot is installed below the electrical cabinet, and the ground foot and the electrical cabinet are connected by a lead screw.

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