Double-screw plastic extruder

Abstract

The utility model provides a double-screw plastic extruder. The double-screw plastic extruder comprises a plastic extruder body, a transposition mechanism and a feeding mechanism, the transposition mechanism is installed on the machine table, the feeding mechanism is arranged on the transposition mechanism, and the feeding mechanism can move on the transposition mechanism; at least two feeding mechanisms are arranged on the transposition mechanism; the feeding mechanism is used for being communicated with a plastic extruder body. According to the anti-blocking feeding device, the anti-blocking function can be achieved, more uniform feeding can be achieved for a double-screw plastic extruder, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of plastic extruder especially is concerned with a double screw plastic extruder. BACKGROUND

[0002] The double screw plastic extruder is a kind of high-efficiency plastic processing machinery, mainly used for processing plastic raw materials into various shaped products.The feed device of the double screw plastic extruder is an important component thereof, mainly responsible for the quantitative and continuous conveying of plastic raw materials to the screw of the double screw extruder.The feed device is usually composed of a material tank, a feeding screw, a speed reducer and a motor.The material tank is used for storing plastic raw materials, and the feeding screw continuously and uniformly conveys the raw materials to the screw by the driving of the speed reducer and the motor.The structural design of the feed device directly affects the feeding effect, production efficiency, extrusion quality and stability of the extruder.

[0003] However, the existing double screw plastic extruder feed device is generally located above the hopper of the extruder, and the material is first sucked into the hopper by a vacuum pump and then vertically falls into the extruder by gravity, and the feed inlet of the extruder has no special structure to prevent the raw material from being blocked.But due to the different shapes and sizes of raw materials, especially when the raw materials after secondary or even multiple processing have long chain materials such as incomplete pelletizing and particle adhesion, the material often horizontally frames at the feed inlet when falling from the hopper into the extruder, causing the feed inlet to be blocked, and thus causing the extruder feeding to be interrupted, so how to avoid the blockage of the extruder feed device is a problem.

[0004] And for the double screw plastic extruder, since there are two screws, most of the raw materials will be concentrated in the middle during feeding, so how to disperse the raw materials to both sides corresponding to the position of the double screw is also a problem to be solved. INVENTION CONTENTS

[0005] Therefore, the utility model aims at providing a double screw plastic extruder, which can realize the anti-blocking function and can realize more uniform feeding for the double screw plastic extruder to improve the product quality.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A double screw plastic extruder, comprising a plastic extruder body, a transposition mechanism and a feeding mechanism;

[0008] The transposition mechanism is installed on the machine table, the feeding mechanism is arranged on the transposition mechanism, and the feeding mechanism can move on the transposition mechanism;

[0009] At least two feeding mechanisms are arranged on the transposition mechanism;

[0010] The feeding mechanism is used in communication with the plastic extruder body.

[0011] Further, the transposition mechanism comprises a bracket and a slide rail;

[0012] The slide rail is mounted to the machine table through the bracket, and the slide rail is arranged above the plastic extruder body; the feeding mechanism is mounted to the slide rail through the walking mounting frame;

[0013] The walking mounting frame is connected with the slide rail through the sliding assembly;

[0014] The sliding assembly can be moved by manual driving or electric driving.

[0015] Further, the feeding mechanism comprises a material box, a primary stirring mechanism and a secondary dispersion mechanism;

[0016] The material box is mounted to the walking mounting frame; the primary stirring mechanism and the secondary dispersion mechanism are both mounted to the material box, and the primary stirring mechanism is arranged above the secondary dispersion mechanism;

[0017] The primary stirring mechanism is used to prevent the raw materials in the material box from being blocked;

[0018] The secondary dispersion mechanism is used to disperse the raw materials to the position of the double screw rod.

[0019] Further, the material box is a conical barrel type, the primary stirring mechanism comprises a stirring motor and a stirring rod, the stirring motor is mounted to the walking mounting frame, one end of the stirring rod is connected to the output end of the stirring motor, and the other end of the stirring rod penetrates through the material box so that the stirring rod is arranged in the material box.

[0020] Further, the stirring rod comprises a main rod and a branch rod, and the branch rods are uniformly and alternately arranged on the main rod.

[0021] Further, the secondary dispersion mechanism comprises a dispersion motor and a dispersion auger; the dispersion motor is mounted to the walking mounting frame, and the dispersion auger is arranged in the material box and has one end penetrating through the material box and connected to the output end of the dispersion motor.

[0022] Further, the dispersion auger is symmetrically structured with the center as the reference, that is, one half of the stirring auger is in positive helix shape, and the other half is in reverse helix shape.

[0023] The dispersion auger is used to disperse the raw materials gathered in the middle part to both sides.

[0024] Further, the discharge port of the material box and the feeding port of the plastic extruder are connected through a double-flange force transmission joint.

[0025] Relative to the prior art, the double-screw plastic extruder has the following advantages:

[0026] (1) The double-screw plastic extruder can realize the anti-blocking function, and for the plastic extruder of the double screw, more uniform feeding can be realized, and the product quality is improved.

[0027] (2) The double-screw plastic extruder further comprises a transposition mechanism, because different models of feeding mechanisms can be used according to different processing conditions, so that the feeding mechanisms are modularized and classified, and more processing conditions can be adapted.

[0028] And a cleaning mechanism can be further arranged on the transposition mechanism, and the cleaning mechanism is connected with the plastic extruder body through the double-flange force transmission joint, so that the replacement is fast and convenient, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of this description, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings serve to explain the application and do not constitute any improper limitation to the application. In the drawings:

[0030] Figure 1 FIG. 1 is a schematic view of a double-screw plastic extruder according to an embodiment of the application;

[0031] Figure 2 FIG. 2 is a sectional view of a feeding mechanism according to an embodiment of the application.

[0032] REFERENCE SIGNS:

[0033] 1, plastic extruder body; 2, transposition mechanism; 21, support; 22, slide rail; 23, walking mounting frame; 3, feeding mechanism; 31, material box; 32, primary stirring mechanism; 321, stirring motor; 322, stirring rod; 33, secondary dispersion mechanism; 331, dispersion motor; 332, dispersion auger; 4, machine table; 5, double-flange force transmission joint. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0035] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0037] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] A double screw plastic extruder, as shown in Figure 1 Figure 2 The plastic extruder body 1, the transposition mechanism 2 and the feeding mechanism 3 are shown.

[0039] The transposition mechanism 2 is installed on the machine table 4, the feeding mechanism 3 is arranged on the transposition mechanism 2, and the feeding mechanism 3 can move on the transposition mechanism 2.

[0040] At least two feeding mechanisms 3 are arranged on the transposition mechanism 2; they can be replaced according to different processing conditions; and a cleaning device can also be arranged on the transposition mechanism 2 to clean the plastic extruder body 1; the feeding mechanism 3 is used to communicate with the plastic extruder body 1.

[0041] Preferably, the transposition mechanism 2 comprises a support 21 and a sliding rail 22.

[0042] The sliding rail 22 is installed on the machine table 4 through the support 21, and the sliding rail 22 is arranged above the plastic extruder body 1; the feeding mechanism 3 is installed on the sliding rail 22 through a walking mounting frame 23.

[0043] The walking mounting frame 23 is connected with the slide rail 22 through a sliding assembly;

[0044] The sliding assembly can be moved through manual driving or electric driving; the sliding mode of the sliding assembly includes but is not limited to the form of guide rail and sliding block, the form of guide rod and guide sleeve, and the form of track and pulley.

[0045] The driving mode includes but is not limited to the form of gear, rack and driving motor, the form of screw rod, nut seat and driving motor.

[0046] Finally, the walking mounting frame 23 can be directly pushed by manual work to realize transposition.

[0047] Preferably, the slide rail 22 is provided with a limiting piece, which can limit the walking mounting frame 23 to avoid falling or shaking of the walking mounting frame 23 and improve the stability of the walking mounting frame 23.

[0048] Preferably, the feeding mechanism 3 includes a material box 31, a primary stirring mechanism 32 and a secondary dispersion mechanism 33.

[0049] The material box 31 is mounted to the walking mounting frame 23; the primary stirring mechanism 32 and the secondary dispersion mechanism 33 are both mounted to the material box 31, and the primary stirring mechanism 32 is arranged above the secondary dispersion mechanism 33.

[0050] The primary stirring mechanism 32 is used to prevent the material in the material box 31 from being blocked.

[0051] The secondary dispersion mechanism 33 is used to disperse the material to the position of the double screw rod.

[0052] Preferably, the material box 31 is a conical barrel, the primary stirring mechanism 32 includes a stirring motor 321 and a stirring rod 322, the stirring motor 321 is mounted to the walking mounting frame 23, one end of the stirring rod 322 is connected to the output end of the stirring motor 321, and the other end of the stirring rod 322 penetrates through the material box 31 so that the stirring rod 322 is arranged in the material box 31.

[0053] Preferably, the stirring rod 322 includes a main rod and branch rods, and the branch rods are uniformly and alternately arranged on the main rod.

[0054] Preferably, the secondary dispersion mechanism 33 includes a dispersion motor 331 and a dispersion auger 332; the dispersion motor 331 is mounted to the walking mounting frame 23, and the dispersion auger 332 is arranged in the material box 31 and penetrates through the material box 31 to be connected to the output end of the dispersion motor 331.

[0055] Preferably, the dispersion screw 332 is symmetrically structured with the center as the reference, that is, one half of the stirring screw is positively helical, and the other half is negatively helical.

[0056] The dispersion screw 332 is used to disperse the raw materials gathered in the middle to both sides.

[0057] Preferably, the discharge port of the material box 31 and the feeding port of the plastic extruder are connected through the double-flange force transmission joint 5, which can stably realize the connection and compensate the gap.

[0058] Through the feeding mechanism 3, the anti-blocking function can be realized, and for the double-screw plastic extruder, more uniform feeding can be realized, and the product quality can be improved.

[0059] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A twin-screw plastic extruder, characterized in that: This includes the plastic extruder body, the shifting mechanism, and the feeding mechanism; The switching mechanism is installed on the machine base, and a feeding mechanism is provided on the switching mechanism, which is movable on the switching mechanism; The switching mechanism is equipped with at least two feeding mechanisms; The feeding mechanism is used to connect with the plastic extruder body.

2. The twin-screw plastic extruder according to claim 1, characterized in that: The switching mechanism includes a bracket and a slide rail; The slide rail is mounted on the machine base via a bracket and is positioned above the plastic extruder body; the feeding mechanism is mounted on the slide rail via a traveling mounting frame. The walking mounting frames are connected to slide rails via sliding components; The sliding component can be moved manually or electrically.

3. A twin-screw plastic extruder according to claim 2, characterized in that: The feeding mechanism includes a material hopper, a primary mixing mechanism, and a secondary dispersing mechanism; The material box is installed on the walking mounting frame; the primary mixing mechanism and the secondary dispersing mechanism are both installed on the material box, and the primary mixing mechanism is located above the secondary dispersing mechanism; The primary mixing mechanism is used to prevent raw material blockage in the hopper; The secondary dispersion mechanism is used to disperse the raw materials to the location of the twin screw.

4. A twin-screw plastic extruder according to claim 3, characterized in that: The material box is cone-shaped, and the primary mixing mechanism includes a mixing motor and a mixing rod. The mixing motor is mounted on a traveling mounting frame, one end of the mixing rod is connected to the output end of the mixing motor, and the other end of the mixing rod passes through the material box, so that the mixing rod is placed inside the material box.

5. A twin-screw plastic extruder according to claim 4, characterized in that: The stirring rod includes a main rod and support rods, with the support rods evenly and alternately arranged on the main rod.

6. A twin-screw plastic extruder according to claim 3, characterized in that: The secondary dispersing mechanism includes a dispersing motor and a dispersing auger; the dispersing motor is mounted on a traveling mounting frame, and the dispersing auger is set inside the material box, with one end of the dispersing auger passing through the material box and connected to the output end of the dispersing motor.

7. A twin-screw plastic extruder according to claim 6, characterized in that: The dispersing auger has a symmetrical structure with the center as the reference, that is, one half of the stirring auger is in a forward spiral shape and the other half is in a reverse spiral shape. The dispersing auger is used to disperse the raw materials gathered in the middle to both sides.

8. A twin-screw plastic extruder according to claim 3, characterized in that: The discharge port of the hopper and the feed port of the plastic extruder are connected by a double flange force transmission joint.

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