Double-screw assembly for bulking machine

Abstract

The double-screw assembly for the bulking machine comprises screw main bodies, machine body end barrels, supporting mechanisms, contact mechanisms, connecting mechanisms and reinforcing mechanisms, the two screw main bodies are symmetrically arranged, the free ends of the screw main bodies are inserted into the machine body end barrels, the supporting mechanisms are arranged at the free ends of the screw main bodies, and the contact mechanisms are arranged at the free ends of the screw main bodies. The contact mechanism is used for reducing friction force between the free end of the screw body and the supporting mechanism, the connecting mechanism is arranged between the supporting mechanism and the machine body end barrel, and the reinforcing mechanism is arranged between the machine body end barrel and the connecting mechanism. The free end of the screw main body is supported by the supporting mechanism, so that the flexural deflection of the screw main body can be reduced, the direct contact between threads on the outer wall of the screw main body and a machine barrel of a bulking machine is avoided, the friction is reduced, and the service life of the double-screw assembly is prolonged; and the supporting mechanism is not used for being in contact with the materials, so that the discharging stability of the bulking machine is ensured.

Description

Technical Field

[0001] This utility model relates to the field of twin-screw technology, and in particular to a twin-screw assembly for an extruder. Background Technology

[0002] In the food, feed, and chemical industries, extrusion technology is widely used in processes such as material cooking, extrusion, and extrusion molding. As a highly efficient processing equipment, the twin-screw extruder's core component, the twin-screw assembly, plays a crucial role in conveying, compressing, shearing, melting, and homogenizing materials during operation.

[0003] Traditional twin-screw assemblies typically consist of two meshing screws. The screw body is functionally divided into a feeding section, a compression section, a melting section, and a homogenization section. The lead, pitch, and tooth profile of each screw section are designed according to process requirements to achieve progressive material processing. The drive end of the screw is generally connected to the gearbox via a bearing assembly, while the free end of the screw is located at the discharge position of the extruder and is in a suspended state. This causes the screw to swerve and bend during rotation, thus reducing the stability of the twin-screw assembly. Utility Model Content

[0004] The purpose of this invention is to provide a twin-screw assembly for an extruder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a twin-screw assembly for an extruder, comprising:

[0006] Screw body, the two screw bodies are arranged symmetrically;

[0007] The free end of the screw body is inserted into the inside of the machine body end cylinder;

[0008] A support mechanism is provided at the free end of the screw body;

[0009] A contact mechanism is provided to reduce the friction between the free end of the screw body and the support mechanism.

[0010] A connecting mechanism is provided between the support mechanism and the end cylinder of the machine body;

[0011] A reinforcing mechanism is provided between the end cylinder of the machine body and the connecting mechanism.

[0012] Preferably, the free end of the screw body is elongated.

[0013] Preferably, the support mechanism includes a support ring, which is sleeved on the free end of the screw body, and the contact mechanism is disposed on the inner wall of the support ring.

[0014] Preferably, the contact mechanism includes:

[0015] The ball holes are arranged in a ring array on the inner wall of the support ring;

[0016] The ball is movably engaged in the inner wall of the ball hole, protrudes from the inner wall of the support ring, and its outer wall is fitted against the outer wall of the free end of the screw body.

[0017] Preferably, the connecting mechanism includes:

[0018] A connecting rod, which is fixedly connected to the back of the end cylinder of the machine body;

[0019] The L-shaped blocks are symmetrically fixed to the ends of the connecting rods. The bottom ends of the two L-shaped blocks are respectively fixed to the top ends of the outer walls of the two support rings. The reinforcing mechanism is located between the L-shaped blocks and the end cylinder of the machine body.

[0020] Preferably, the reinforcement mechanism includes a reinforcing rod, which is inclined, with one end of the reinforcing rod fixedly connected to the side of the front of the L-shaped block and the other end of the reinforcing rod fixedly connected to the back of the end cylinder of the machine body.

[0021] The technical effects and advantages of this utility model are as follows:

[0022] This invention supports the free end of the screw body through a support mechanism, thereby reducing the deflection and deformation of the screw body and preventing the threads on the outer wall of the screw body from directly contacting the extruder barrel, reducing friction and extending the service life of the twin-screw assembly. At the same time, through the cooperation of the connecting mechanism, the support mechanism is not used to contact the material, thus ensuring the stability of the extruder's output. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure at point A.

[0025] Figure 3 This is a top-view cross-sectional view of the support ring structure of this utility model.

[0026] In the diagram: 101, screw body; 102, machine body end cylinder; 201, support ring; 301, ball hole; 302, rolling ball; 401, L-shaped block; 402, connecting rod; 501, reinforcing rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides, for example Figures 1-3 The diagram shows a twin-screw assembly for an extruder, comprising a screw body 101, a machine body end cylinder 102, a support mechanism, a contact mechanism, a connecting mechanism, and a reinforcing mechanism. The two screw bodies 101 are symmetrically arranged. The free ends of the screw bodies 101 are inserted into the interior of the machine body end cylinder 102. The support mechanism is located at the free ends of the screw bodies 101. The contact mechanism reduces friction between the free ends of the screw bodies 101 and the support mechanism. The connecting mechanism is located between the support mechanism and the machine body end cylinder 102. The reinforcing mechanism is located between the machine body end cylinder 102 and the connecting mechanism. The outer wall of the screw body 101 has multiple functional sections, including a feeding section, ... The screw body 101 has different lead, pitch, and tooth profile in each of the compression, melting, and homogenization sections. This results in physical changes in the material as it moves through the twin-screw assembly. Finally, the material is discharged through the end cylinder 102 of the machine body. The free end of the screw body 101 is supported by a support mechanism, which reduces the deflection of the screw body 101 and prevents the threads on the outer wall of the screw body 101 from directly contacting the extruder barrel, thus reducing friction and extending the service life of the twin-screw assembly. At the same time, the support mechanism is prevented from contacting the material through the connecting mechanism, thereby ensuring the stability of the extruder's output.

[0029] The free end of the screw body 101 is elongated and connected to the support mechanism, so that the material is discharged from the gap between the end cylinder 102 of the machine body and the support mechanism, thus avoiding the support mechanism from affecting the output of the extruder.

[0030] The support mechanism includes a support ring 201, which is sleeved on the free end of the screw body 101. A contact mechanism is disposed on the inner wall of the support ring 201. By sleeved on the extended free end of the screw body 101 by the support ring 201, and with the cooperation of the connecting mechanism, the screw body 101 is limited and supported by the support ring 201 during rotation. This prevents the free end of the screw body 101 from moving during rotation, thereby improving the stability of the twin-screw assembly.

[0031] The contact mechanism includes a ball hole 301 and a rolling ball 302. The ball holes 301 are arranged in a ring array on the inner wall of the support ring 201. The rolling ball 302 is movably engaged with the inner wall of the ball hole 301 and protrudes from the inner wall of the support ring 201. The outer wall of the rolling ball 302 is fitted against the outer wall of the free end of the screw body 101. After the free end of the screw body 101 is inserted into the support ring 201, the outer wall of the free end of the screw body 101 will contact the outer wall of the rolling ball 302. When the screw body 101 rotates and works, the rolling ball 302 will roll in the ball hole 301 under the action of friction between the outer wall of the free end of the screw body 101 and the outer wall of the rolling ball 302. This reduces the friction generated when the free end of the screw body 101 rotates, making the screw body 101 rotate more smoothly.

[0032] The connecting mechanism includes an L-shaped block 401 and a connecting rod 402. The connecting rod 402 is fixedly connected to the back of the end cylinder 102 of the machine body. The reinforcing mechanism is set between the L-shaped block 401 and the end cylinder 102 of the machine body. The L-shaped blocks 401 are symmetrically fixedly connected to the ends of the connecting rods 402. The bottom ends of the two L-shaped blocks 401 are respectively fixedly connected to the top ends of the outer walls of the two support rings 201. The support rings 201 and the end cylinder 102 of the machine body are fixed by the connecting rods 402 and the L-shaped blocks 401, thereby improving the stability of the working of the support mechanism. At the same time, the connecting rods 402 and the L-shaped blocks 401 are both set above the free end of the screw body 101, so that the connecting mechanism will not affect the discharge of the extruder and ensure the stability of the extruder's operation.

[0033] The reinforcement mechanism includes a reinforcing rod 501, which is inclined. One end of the reinforcing rod 501 is fixedly connected to the side of the front of the L-shaped block 401, and the other end of the reinforcing rod 501 is fixedly connected to the back of the end cylinder 102 of the machine body. The L-shaped block 401 and the end cylinder 102 of the machine body are connected by the reinforcing rod 501, thereby improving the stability of the connection between the connecting mechanism and the end cylinder 102 of the machine body, making it less likely for the connection between the connecting mechanism and the end cylinder 102 of the machine body to break.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A twin-screw assembly for an extruder, characterized in that, include: Screw body (101), the two screw bodies (101) are arranged symmetrically; The free end of the screw body (101) is inserted into the interior of the machine body end cylinder (102); A support mechanism is provided at the free end of the screw body (101); A contact mechanism is provided to reduce the friction between the free end of the screw body (101) and the support mechanism. A connecting mechanism is provided between the support mechanism and the end cylinder (102) of the machine body; A reinforcing mechanism is provided between the end cylinder (102) of the machine body and the connecting mechanism.

2. The twin-screw assembly for an extruder according to claim 1, characterized in that, The free end of the screw body (101) is elongated.

3. The twin-screw assembly for an extruder according to claim 1, characterized in that, The support mechanism includes a support ring (201), which is sleeved on the free end of the screw body (101), and the contact mechanism is disposed on the inner wall of the support ring (201).

4. A twin-screw assembly for an extruder according to claim 3, characterized in that, The contact mechanism includes: The ball holes (301) are arranged in a ring array on the inner wall of the support ring (201); The ball (302) is movably engaged in the inner wall of the ball hole (301), the ball (302) protrudes from the inner wall of the support ring (201), and the outer wall of the ball (302) is fitted against the outer wall of the free end of the screw body (101).

5. A twin-screw assembly for an extruder according to claim 3, characterized in that, The connecting mechanism includes: A connecting rod (402) is fixedly connected to the back of the end cylinder (102) of the machine body; L-shaped blocks (401) are symmetrically fixed to the ends of connecting rods (402). The bottom ends of the two L-shaped blocks (401) are respectively fixed to the top ends of the outer walls of the two support rings (201). The reinforcement mechanism is set between the L-shaped blocks (401) and the end cylinder (102) of the machine body.

6. A twin-screw assembly for an extruder according to claim 5, characterized in that, The reinforcement mechanism includes a reinforcing rod (501), which is inclined. One end of the reinforcing rod (501) is fixedly connected to the side of the front of the L-shaped block (401), and the other end of the reinforcing rod (501) is fixedly connected to the back of the end cylinder (102) of the machine body.

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