Conical double-screw extruder

Abstract

The utility model discloses a conical double-screw extruder which comprises a charging barrel, a die head is arranged at the end of the charging barrel, an extrusion screw is arranged in the charging barrel, a reduction gearbox is arranged at the end, away from the die head, of the charging barrel, and the extrusion screw is fixedly connected with an output shaft of the reduction gearbox through a coupler. A material barrel flange arranged on the periphery of the coupler in a sleeved mode is arranged on the side face of the reduction gearbox, a movable support is arranged below the material barrel, the material barrel is fixed above the movable support, and a movable support driving device is arranged at the bottom of the movable support. The function that the screw rod can be pulled out is achieved, the state of materials in all functional areas of the screw rod can be seen more visually, various test parameters can be analyzed conveniently, the trial and error time is shortened, and the test efficiency is improved.

Description

Technical Field

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

[0002] The existing conical twin-screw extruders, ordinary integrated conical twin-screw extruders, cannot see the state of each section of the conical twin-screw in the extruder. When plasticizing and molding polymer material particles, the quality of the produced products can only be judged by observing the color of the molded products, the surface smoothness, etc. If it does not meet the requirements, it is necessary to use experience to judge which parameters affect the particles during the extrusion process, such as temperature, pressure, rotation speed and other parameters, and through continuous trial and error, to obtain products that meet the requirements. The operation is cumbersome and the production efficiency is low. Utility Model Content

[0003] The utility model aims to provide a conical twin-screw extruder to solve the problems of the existing conical twin-screw extruder proposed in the above background technology that the state of each section of particles on the conical twin-screw in the extruder cannot be seen, which leads to increased trial and error time and low test efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a conical twin-screw extruder, comprising a barrel, a die head is arranged at the end of the barrel, an extrusion screw is arranged in the barrel, a reduction box is arranged on the end of the barrel away from the die head, the extrusion screw is fixedly connected to the output shaft of the reduction box through a coupling, a barrel flange is arranged on the side of the reduction box and is sleeved on the outer periphery of the coupling, the barrel flange is arranged coaxially with the barrel, a movable bracket is arranged below the barrel, the barrel is fixed above the movable bracket, and a movable bracket driving device is arranged at the bottom of the movable bracket.

[0005] A barrel support and a movable sheet metal are arranged between the barrel and the movable bracket. The barrel is fixed on the top of the barrel support, the barrel support is fixed on the movable sheet metal, and the movable sheet metal is fixed on the top of the movable bracket.

[0006] The die head is fixed to the end of the barrel by a half clamp.

[0007] The barrel flange is fixedly connected to the reduction box by screws.

[0008] The mobile bracket driving device includes a slider, a guide rail baffle, a driving screw and a screw motor. The slider is fixed to the bottom end of the mobile bracket, the slider slides with the guide rail on the side of the guide rail baffle, the guide rail baffle is fixed on the support frame, the driving motor is fixed to the bottom end of the slider, the screw motor is installed and matched with the screw, and both ends of the screw are fixed to the support frame.

[0009] The reduction box is fixed on the supporting frame.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model changes the barrel of the conical twin-screw extruder into a split structure, realizes the function of the screw being withdrawable without leaking material, can more intuitively see the state of the material in each functional area of ​​the screw, is convenient for analyzing various test parameters, reduces trial and error time, and increases test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0013] In the attached drawings, there are die head 1, half clamp 2, barrel 3, barrel support 4, extrusion screw 5, barrel flange 6, coupling 7, reduction box 8, movable sheet metal 9, slider 10, movable bracket 11, guide rail baffle 12, drive screw 13, support frame 14, and screw motor 15. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] like Figure 1 As shown, the conical twin-screw extruder provided by the utility model comprises a barrel 3, a die head 1, an extrusion screw 5 and a reduction gearbox 8. The extrusion screw 5 is fixedly connected to the output shaft of the reduction gearbox 8 through a coupling 7. The extrusion screw 5 is driven by the reduction gearbox 8 to rotate to extrude the material in the barrel 3 through the die head. What is different from the existing conical twin-screw extruder is that the barrel 3 and the reduction gearbox 8 are arranged as a split structure. A movable bracket 11 is arranged below the barrel 3. The barrel 3 is fixed above the movable bracket 11. A movable bracket 11 driving device is arranged at the bottom of the movable bracket 11. The movable bracket 11 and the barrel 3 fixed on the movable bracket 11 are driven to move by the driving device. The extrusion screw 5 is exposed through the movement of the barrel 3, and the pull-out function of the extrusion screw 5 is realized, so that the rear end of the barrel 3 can be closely matched with the barrel flange 6 to prevent leakage. The state of the material in each functional area of ​​the extrusion screw 5 can be more intuitively seen, which is convenient for analyzing various test parameters, reducing trial and error time, and increasing test efficiency.

[0016] Optionally, a barrel support 4 and a movable sheet metal 9 are provided between the barrel 3 and the movable bracket 11 , and the barrel 3 is fixed to the top end of the movable bracket 11 through the barrel support 4 and the movable sheet metal 9 .

[0017] Optionally, the die head 1 is fixed to the end of the barrel 3 by a half clamp 2 .

[0018] Optionally, the barrel flange 6 is fixedly connected to the reduction box 8 by screws, the barrel flange 6 is coaxially arranged with the barrel 3 , the reduction box is fixed on the support frame 14 , and the barrel flange 6 can seal the end of the barrel 3 .

[0019] Optionally, the driving device of the mobile bracket 11 includes a slider 10, a guide rail baffle 12, a driving screw 13 and a screw motor 15. Specifically, the slider 10 is fixed to the mobile bracket 11 with screws, the guide rail baffle 12 is welded to the support frame 14, the guide rail is fixed to the guide rail baffle 12 with screws, and the guide rail is slidably connected to the slider 10, the screw motor 15 is fixed to the mounting plate at the bottom of the slider 10, the screw motor 15 is matched and connected to the driving screw 13, the driving screw 13 is fixed to the support frame 14, and the screw motor 15 is matched and connected to the driving screw 13. The ... The rod motor 15 starts in the forward direction, and the screw motor 15 moves forward along the screw, dragging the movable bracket 11 and the movable sheet metal 9 to move away from the reducer end, and the barrel 3 is separated from the barrel flange 6 to expose the extrusion screw 5. When the extrusion screw 5 is fully exposed, the motor stops rotating and the position is fixed. The motor starts in the reverse direction, and the screw motor 15 moves forward along the extrusion screw 5, dragging the movable bracket 11 and the movable sheet metal 9 to move toward the reducer end, and the barrel 3 is close to the barrel flange 6. The barrel 3 and the barrel flange 6 are fully fitted together, and the motor stops rotating and the position is fixed.

[0020] The conical twin-screw extruder provided by the utility model exposes the driving screw 13 of the discharging station by moving the barrel 3, so that the screw of the twin-screw extruder has a pull-out function. At the same time, the rear end of the barrel 3 can be closely matched with the barrel flange 6 to prevent leakage. It is matched with a screw motor 15 drive, and the linear guide rail and the slider 10 cooperate with each other to realize the automation of extracting and putting back the barrel 3, and the control is more precise without the problem of jamming. At the same time, there is a baffle on the guide rail to prevent leakage from contaminating the guide rail and causing the slider 10 to get stuck, thereby affecting the extraction and retraction of the barrel 3.

Claims

1. A conical twin-screw extruder, comprising a barrel, a die head is arranged at the end of the barrel, an extrusion screw is arranged in the barrel, a reduction box is arranged on the end of the barrel away from the die head, and the extrusion screw is fixedly connected to the output shaft of the reduction box through a coupling, characterized in that: A barrel flange sleeved on the outer periphery of the coupling is arranged on the side of the reduction box, a movable bracket is arranged below the barrel, the barrel is fixed above the movable bracket, and a movable bracket driving device is arranged at the bottom of the movable bracket. When the barrel and the barrel flange are close to each other, the barrel and the barrel flange are completely fitted.

2. A conical twin-screw extruder according to claim 1, characterized in that: A barrel support and a movable sheet metal are arranged between the barrel and the movable bracket. The barrel is fixed on the top of the barrel support, the barrel support is fixed on the movable sheet metal, and the movable sheet metal is fixed on the top of the movable bracket.

3. A conical twin-screw extruder according to claim 1, characterized in that: The die head is fixed to the end of the barrel by a half clamp.

4. A conical twin-screw extruder according to claim 1, characterized in that: The barrel flange is fixedly connected to the reduction box by screws.

5. A conical twin-screw extruder according to claim 1, characterized in that: The mobile bracket driving device includes a slider, a guide rail baffle, a driving screw and a screw motor. The slider is fixed to the bottom end of the mobile bracket, the slider slides with the guide rail on the side of the guide rail baffle, the guide rail baffle is fixed on the support frame, the driving motor is fixed to the bottom end of the slider, the screw motor is installed and matched with the screw, and both ends of the screw are fixed to the support frame.

6. A conical twin-screw extruder according to claim 5, characterized in that: The reduction box is fixed on the supporting frame.

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