A conical low-noise twin-screw extruder

Abstract

The utility model discloses a kind of conical low-noise double-screw extruders, specifically related to extruder technical field, including pedestal, the top of pedestal is provided with rotating motor, rotating motor is connected with gear distribution box by coupling, the side of gear distribution box is provided with extrusion cylinder, two shaft ends that are symmetrical in extrusion cylinder are provided with conical screw, gear distribution box output end is connected, noise reduction structure one is provided on pedestal, and noise reduction structure one is arranged at the outside of rotating motor and gear distribution box;Extrusion cylinder is fixedly connected with the material pipe communicated with it, the feeding end of material pipe is provided with screw conveyor body, the feeding port of screw conveyor body is provided with edulcoration box, and both sides of edulcoration box are provided with through slot;The utility model solves the technical problem that screw extruder of prior art does not prevent the metal scrap in feeding system from being handled, thereby leading to the deficiency of the safety of the operation of screw extruder.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, and more specifically, to a conical low-noise twin-screw extruder. Background Technology

[0002] Extruders belong to the category of plastic machinery. Screw extruders, as a type of extruder, rely on the pressure and shear force generated by the rotating screw to fully plasticize and uniformly mix the material, which is then shaped after passing through a die. Extruders can be classified into twin-screw extruders, single-screw extruders, multi-screw extruders, and screwless extruders, among others.

[0003] For example, utility model patent publication number CN217258232U discloses a conical twin-screw extruder with a dispersing and feeding structure, including a conical twin-screw extruder body. In this utility model, a moving stirring rod 2 further improves the dispersing effect on the material, and the rotation of the circular tube drives the circular rod 2 to rotate, thereby preventing material blockage inside the hopper. This allows the dispersed material inside the hopper to be quickly transported to the interior of the conical twin-screw extruder body.

[0004] In related technologies, screw extruders achieve the effect of material dispersion during the feeding process. However, if metal fragments are mixed into the material during actual feeding, these fragments can easily damage the operation of the screw extruder and affect the extrusion quality. Although the possibility of metal fragments being mixed into the material is small, existing screw extruders do not prevent this risk, resulting in insufficient safety in the operation of the screw extruder.

[0005] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a conical low-noise twin-screw extruder in order to achieve a more practical purpose. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that addresses the problem that existing screw extruders do not prevent the occurrence of metal debris in the feeding system, thus resulting in insufficient safety during screw extruder operation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a conical low-noise twin-screw extruder, comprising a base, a rotary motor disposed on the top of the base, a gear distribution box connected to the rotary motor via a coupling, an extrusion cylinder disposed on one side of the gear distribution box, two conical screws symmetrically disposed inside the extrusion cylinder with their shaft ends connected to the output end of the gear distribution box, and a noise reduction structure I disposed on the base, the noise reduction structure I disposed on the outside of the rotary motor and the gear distribution box;

[0008] The extrusion cylinder is fixedly connected to a material pipe that communicates with it. The feed end of the material pipe is equipped with a screw conveyor body. The feed inlet of the screw conveyor body is equipped with a cleaning box. Both sides of the cleaning box are provided with through slots. Each through slot is movably connected with a sliding support assembly. The sliding support assembly is equipped with a support plate. Multiple metal adsorption rods are fixedly connected to the side of the support plate.

[0009] In a preferred embodiment, a heater is provided on the outer side of the extrusion cylinder.

[0010] In a preferred embodiment, the noise reduction structure includes a support frame bolted to the top of the base, and sound-absorbing panels are fixedly connected to the inner walls of the support frame. Multiple inclined sound-absorbing panels are fixedly connected to the inner wall of one end of the support frame.

[0011] In a preferred embodiment, a hopper communicating with the top of the impurity removal box is fixedly connected, and a wear-resistant baffle is fixedly connected to one side of the upper through groove of the impurity removal box, and the wear-resistant baffle is slidably connected to the support plate.

[0012] In a preferred embodiment, the sliding support assembly includes a pair of slide rails, which are slidably connected to the top and bottom positions of the through groove, respectively. A fixing plate is fixedly connected to the pair of slide rails, and the support plate is disposed between the pair of slide rails.

[0013] In a preferred embodiment, the corresponding metal adsorption rods on a pair of support plates are arranged in an alternating pattern.

[0014] In a preferred embodiment, a belt drive mechanism is provided at the end of the screw body of the screw conveyor, a drive rod is provided on the belt drive mechanism, a reciprocating screw is fixedly connected to one end of the drive rod, a movable plate is threadedly connected to the reciprocating screw, and both ends of the movable plate are fastened to the fixed plate and the support plate by bolts.

[0015] In a preferred embodiment, a second noise reduction structure is provided on the support frame, and the second noise reduction structure is located outside the drive device of the screw conveyor body. The structure of the second noise reduction structure is the same as that of the first noise reduction structure.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. This conical low-noise twin-screw extruder uses a dust removal box at the feed position to adsorb and remove metal debris mixed in with the material by using multiple staggered metal adsorption rods in the dust removal box. This effectively prevents metal debris from entering the extrusion cylinder and affecting the extrusion quality and the reliability of the extrusion operation.

[0018] 2. This conical low-noise twin-screw extruder connects the support plate on the metal adsorption rod to the power mechanism of the screw conveyor body. The reciprocating screw and the reciprocating thread of the moving plate enable the metal adsorption rod to move back and forth in the impurity removal box. By increasing the moving frequency of the metal adsorption rod, the material can pass through the metal adsorption rod more easily, effectively avoiding the problem of material blockage. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This utility model Figure 1 A structural diagram excluding noise reduction structure one and noise reduction structure two;

[0022] Figure 3 These are schematic diagrams of the noise reduction structure one and noise reduction structure two of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the screw conveyor body, the impurity removal box, and the hopper of this utility model;

[0024] Figure 5 This is an exploded view of the interior of the impurity removal box of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the impurity removal box of this utility model.

[0026] The attached diagram is labeled as follows: 1. Base; 2. Rotary motor; 3. Gear distribution box; 4. Extrusion cylinder; 5. Conical screw; 6. Noise reduction structure one; 61. Support frame; 62. Sound absorption panel one; 63. Sound absorption panel two; 7. Material pipe; 8. Screw conveyor body; 9. Impurity removal box; 91. Through groove; 10. Hopper; 11. Sliding support assembly; 111. Slide rail; 112. Fixed plate; 12. Support plate; 13. Metal adsorption rod; 14. Heater; 15. Noise reduction structure two; 16. Wear-resistant baffle; 17. Belt drive mechanism; 18. Transmission rod; 19. Reciprocating screw; 20. Moving plate. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] See also Figures 1-6 This utility model provides a conical low-noise twin-screw extruder, including a base 1, a rotary motor 2 is provided on the top of the base 1, the rotary motor 2 is connected to a gear distribution box 3 through a coupling, an extrusion cylinder 4 is provided on one side of the gear distribution box 3, and two conical screws 5 are symmetrically arranged inside the extrusion cylinder 4, with their shaft ends connected to the output end of the gear distribution box 3.

[0029] In use, the material to be extruded is fed into the extrusion cylinder 4. Since the existing gear distribution box 3 is a mechanical device, it has multiple core functions in the mechanical system, namely speed change function, transmission direction change, torque adjustment, clutch function and power distribution. Therefore, the gear distribution box 3 will not be described in detail here. By starting the power output of the rotary motor 2, the gear distribution box 3 can reduce the power adjustment of the rotary motor 2 and input the value to the conical screw 5. In this way, a pair of conical screws 5 can shear and mix the material.

[0030] In this embodiment, a heater 14 is provided on the outside of the extrusion cylinder 4.

[0031] The heater 14 can use at least one of resistance wire heating or electromagnetic coil heating to heat the extrusion cylinder 4, which can facilitate the melting of the material inside the extrusion cylinder 4.

[0032] In this embodiment: a noise reduction structure 6 is provided on the base 1. The noise reduction structure 6 is located on the outside of the rotary motor 2 and the gear distribution box 3. The noise reduction structure 6 includes a support frame 61, which is bolted to the top of the base 1. Sound-absorbing panels 62 are fixedly connected to the inner wall of the support frame 61. Multiple inclined sound-absorbing panels 63 are fixedly connected to the inner wall of one end of the support frame 61.

[0033] Because the rotating motor 2 and gear distribution box 3 generate operating noise, a noise reduction structure 6 is installed on the outer side of both the rotating motor 2 and gear distribution box 3 to reduce noise pollution. Sound-absorbing panels 62 are installed on the inner three sides of the support frame 61, and ventilation spaces are reserved between adjacent sound-absorbing panels 63. Since the principle of sound-absorbing panels 62 and 63 is based on the scattering and absorption attenuation of sound waves, and because the surface of the sound-absorbing panels is covered with tiny pores or fiber structures, sound waves will undergo multiple reflections and scattering within these tiny channels when they enter. This scattering effect is similar to the behavior of sound waves propagating on a sponge or rough surface, causing the sound wave energy to gradually disperse and attenuate. Considering the working positions of the rotating motor 2 and gear distribution box 3, sound-absorbing panels 63 can only be installed at one end of the inner side of the support frame 61. Furthermore, because sound-absorbing panels 63 are installed at an inclined angle, their position ensures effective heat dissipation and ventilation for the rotating motor 2 from the support frame 61. The inclined surface of sound-absorbing panels 63 can also more easily come into contact with the noise reduction mechanism.

[0034] In this embodiment: a material pipe 7 is fixedly connected to the extrusion cylinder 4 and communicates with it. A screw conveyor body 8 is provided at the feed end of the material pipe 7. A cleaning box 9 is provided at the feed inlet of the screw conveyor body 8. A hopper 10 is fixedly connected to the top of the cleaning box 9 and communicates with it.

[0035] The existing screw conveyor body 8 is a machine that uses a motor to drive the screw to rotate and push materials to achieve the purpose of conveying. The screw conveyor body 8 is mainly composed of a drive device, a screw body and an auxiliary support device. Since it is an existing, mature and publicly available machine, it will not be described in detail here. By mixing the extrusion material into the hopper 10, the impurity removal box 9 can remove metal impurities from the material discharged from the hopper 10. The material removed by the impurity removal box 9 can be fed into the feed pipe 7 of the extrusion cylinder 4 through the screw conveyor body 8.

[0036] In this embodiment: a second noise reduction structure 15 is provided on the support frame 61, and the second noise reduction structure 15 is located outside the drive device of the screw conveyor body 8. The structure of the second noise reduction structure 15 is the same as that of the first noise reduction structure 6.

[0037] The second noise reduction structure 15 can reduce the operating noise of the power part at the drive device position of the screw conveyor body 8. Since the structure and principle of the second noise reduction structure 15 are the same as those of the first noise reduction structure 6, they will not be described in detail here.

[0038] In this embodiment: both sides of the impurity removal box 9 are provided with through grooves 91, and each through groove 91 is movably connected with a sliding support assembly 11. The sliding support assembly 11 includes a pair of slide rails 111, which are slidably connected to the top and bottom positions of the through groove 91 respectively. A fixing plate 112 is fixedly connected to the pair of slide rails 111, and a support plate 12 is provided on the sliding support assembly 11. The support plate 12 is disposed between the pair of slide rails 111.

[0039] The slide rail 111 has a convex structure. The top and bottom positions of the through groove 91 are provided with sliding grooves that are adapted to the slide rail 111. In this way, the slide rail 111 can slide in the sliding groove to stabilize the moving position of the support plate 12. Since the length of the support plate 12 is greater than the length of the through groove 91, the movement of the support plate 12 can reserve a partition part, so that the material in the impurity removal box 9 will not leak out.

[0040] In this embodiment, multiple metal adsorption rods 13 are fixedly connected to the side of the support plate 12, and the corresponding metal adsorption rods 13 on a pair of support plates 12 are arranged in an alternating manner.

[0041] In this application, the metal adsorption rod 13 can be made of a strong permanent magnet to form a rod structure. In this way, the metal adsorption rod 13 is set in the impurity removal box 9 to remove metal impurities from the passing materials. The staggered distribution of the corresponding metal adsorption rods 13 on a pair of support plates 12 can be understood as follows: since the multiple metal adsorption rods 13 on each support plate 12 are arranged in rows and a passage gap is formed between adjacent metal adsorption rods 13, by defining multiple metal adsorption rods 13 as a metal adsorption rod group, the corresponding metal adsorption rod groups on a pair of support plates 12 are arranged vertically and staggeredly, and the vertical passage gaps are also staggered. In this way, when the material passes through the passage gap corresponding to a pair of metal adsorption rod groups, the magnetic attraction area of ​​the metal fragments can be increased, ensuring the thoroughness of metal fragment screening.

[0042] In this embodiment: a belt drive mechanism 17 is provided at the end of the spiral body of the screw conveyor body 8. A drive rod 18 is provided on the belt drive mechanism 17. A reciprocating screw 19 is fixedly connected to one end of the drive rod 18. A moving plate 20 is threadedly connected to the reciprocating screw 19. Both ends of the moving plate 20 are fastened to the fixed plate 112 and the support plate 12 by bolts.

[0043] When the screw conveyor body 8 is running, the belt drive mechanism 17 is a combination of a pair of pulleys and an internal toothed belt drive as in the prior art. In this way, the belt drive mechanism 17 can transmit the power of the rotating screw of the screw conveyor body 8 to the drive rod 18. In order to stabilize the rotation position of the drive rod 18, the extrusion cylinder 4 is provided with a bearing seat to provide rotational support for the drive rod 18. When the drive rod 18 rotates, it can drive the reciprocating screw 19 to rotate. Since the slide rail 111 can slide in the chute to achieve linear guidance, the moving plate 20 can reciprocate on the reciprocating screw 19. The reciprocating moving plate 20 can drive the fixed plate 112 and the support plate 12 to reciprocate. The reciprocating movement of the support plate 12 can make the metal adsorption rod 13 reciprocate within the impurity removal box 9. In this way, the material can avoid the problem of blockage when passing through the gaps between multiple metal adsorption rods 13.

[0044] It is worth noting that since the end of the movable plate 20 is connected to the fixed plate 112 and the support plate 12 by bolts, the support plate 12 can be disconnected from the sliding support assembly 11 by removing the bolts. In this way, the support plate 12 can drive the metal adsorption rod 13 to be taken out so as to clean the metal scraps collected on the metal adsorption rod 13. Similarly, the support plate 12 can be assembled by installing the bolts.

[0045] A wear-resistant baffle 16 is fixedly connected to one side of the through groove 91 on the impurity removal box 9, and the wear-resistant baffle 16 is slidably connected to the support plate 12.

[0046] In this application, the wear-resistant baffle 16 is arranged in a triangular structure. Since the support plate 12 in the through groove 91 needs to move back and forth in a straight line, the wear-resistant baffle 16 can rub against the support plate 12. The contact between the two can reduce the connection gap, and the shape of the wear-resistant baffle 16 can effectively prevent material residue from accumulating at the position of the through groove 91.

Claims

1. A conical low-noise twin-screw extruder, comprising a base (1), characterized in that: A rotary motor (2) is provided on the top of the base (1). The rotary motor (2) is connected to a gear distribution box (3) via a coupling. An extrusion cylinder (4) is provided on one side of the gear distribution box (3). Two tapered screws (5) with shaft ends connected to the output end of the gear distribution box (3) are symmetrically arranged inside the extrusion cylinder (4). A noise reduction structure (6) is provided on the base (1). The noise reduction structure (6) is located on the outside of the rotary motor (2) and the gear distribution box (3). The extrusion cylinder (4) is fixedly connected to a material pipe (7) communicating with it. The feed end of the material pipe (7) is provided with a screw conveyor body (8). The feed inlet of the screw conveyor body (8) is provided with a cleaning box (9). Both sides of the cleaning box (9) are provided with through grooves (91). Each through groove (91) is movably connected with a sliding support assembly (11). The sliding support assembly (11) is provided with a support plate (12). Multiple metal adsorption rods (13) are fixedly connected to the side of the support plate (12).

2. The conical low-noise twin-screw extruder according to claim 1, characterized in that: A heater (14) is provided on the outside of the extrusion cylinder (4).

3. The conical low-noise twin-screw extruder according to claim 1, characterized in that: The noise reduction structure (6) includes a support frame (61), which is bolted to the top of the base (1). The inner wall of the support frame (61) is fixedly connected with a sound-absorbing plate (62), and a plurality of inclined sound-absorbing plates (63) are fixedly connected to the inner wall of one end of the support frame (61).

4. The conical low-noise twin-screw extruder according to claim 1, characterized in that: The top of the impurity removal box (9) is fixedly connected to a hopper (10) communicating with it. A wear-resistant baffle (16) is fixedly connected to one side of the through groove (91) on the impurity removal box (9). The wear-resistant baffle (16) is slidably connected to the support plate (12).

5. A conical low-noise twin-screw extruder according to claim 1, characterized in that: The sliding support assembly (11) includes a pair of slide rails (111), which are slidably connected to the top and bottom positions of the through groove (91), and a fixing plate (112) is fixedly connected to the pair of slide rails (111). The support plate (12) is disposed between the pair of slide rails (111).

6. The conical low-noise twin-screw extruder according to claim 1, characterized in that: The corresponding metal adsorption rods (13) on a pair of support plates (12) are arranged in an alternating pattern.

7. A conical low-noise twin-screw extruder according to claim 5, characterized in that: The screw conveyor body (8) has a belt drive mechanism (17) at the end of the screw body. The belt drive mechanism (17) has a drive rod (18). One end of the drive rod (18) is fixedly connected to a reciprocating screw (19). A moving plate (20) is threadedly connected to the reciprocating screw (19). Both ends of the moving plate (20) are fastened to the fixed plate (112) and the support plate (12) by bolts.

8. A conical low-noise twin-screw extruder according to claim 3, characterized in that: The support frame (61) is provided with a second noise reduction structure (15), and the second noise reduction structure (15) is located outside the drive device of the screw conveyor body (8). The structure of the second noise reduction structure (15) is the same as that of the first noise reduction structure (6).

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