A twin-screw granulator for phosphate flame retardants

Abstract

This utility model discloses a twin-screw granulator for phosphate ester flame retardants, comprising: a worktable, an extrusion tube fixedly connected to the upper surface of the worktable, a feed tube connected to the upper surface of the extrusion tube, a heating plate fixedly connected to the outer wall of the extrusion tube, two screw conveyors rotatably connected to the inner surface of the extrusion tube, multiple discharge holes provided at the front end of the extrusion tube, a cutting component provided at the front end of the extrusion tube, an annular air conveying box embedded in the worktable, an air conveying component provided on the side surface of the annular air conveying box, and a feeding frame connected inside the annular air conveying box, the feeding frame being located below the discharge holes. Through the above components, rapid cooling and shaping can be achieved, avoiding the adhesion of phosphate ester particles. The feeding frame can reciprocate rapidly, accelerating the discharge of particles from the sieve holes. At the same time, during the movement, airflow further separates the particles to prevent adhesion, improving feeding smoothness, and improving product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flame retardant material production technology, and in particular to a twin-screw granulator for phosphate ester flame retardants. Background Technology

[0002] The twin-screw granulator for phosphate flame retardants is a specialized piece of equipment used to process phosphate flame retardant raw materials into granular products after melting, mixing, and extrusion. It is widely used in the field of flame retardant material production.

[0003] Traditional granulators have significant drawbacks when processing phosphate ester flame retardants: the newly formed granules are hot and prone to sticking together due to insufficient cooling, affecting product uniformity; granules are prone to accumulation and blockage during feeding, leading to production interruptions and reduced efficiency; the lack of coordinated design between cooling and feeding processes, and uneven distribution of cooling airflow, further exacerbates the granule agglomeration problem, not only increasing the burden on subsequent screening processes but also potentially affecting the performance of flame retardants due to poor granule morphology, making it difficult to meet the demand for efficient and high-quality phosphate ester flame retardant granulation. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a twin-screw granulator for phosphate flame retardants. This solves the problems of low production efficiency and poor product quality caused by the fact that the freshly formed granules are prone to sticking together due to untimely cooling, easy accumulation and blockage during feeding, and poor coordination between cooling and feeding in the existing twin-screw granulator for phosphate flame retardants.

[0005] This utility model also provides a twin-screw granulator for phosphate ester flame retardants, comprising: a worktable, an extrusion tube fixedly connected to the upper surface of the worktable, a feed tube connected to the upper surface of the extrusion tube, a heating plate fixedly connected to the outer wall of the extrusion tube, two screw conveyors rotatably connected to the inner surface of the extrusion tube, multiple discharge holes provided at the front end of the extrusion tube, a cutting component provided at the front end of the extrusion tube, an annular air conveying box embedded in the worktable, an air conveying component provided on the side surface of the annular air conveying box, a feeding frame connected inside the annular air conveying box, the feeding frame being located below the discharge holes, air holes provided on both the feeding frame and the annular air conveying box, a sieve hole provided at the bottom of the feeding frame, and a pushing component provided on the lower surface of the annular air conveying box.

[0006] According to the phosphate ester flame retardant twin-screw granulator of this utility model, a heat insulation plate is fixedly connected to the side surface of the heating plate.

[0007] According to the phosphate ester flame retardant twin-screw granulator of this utility model, a drive device is fixedly connected to the rear surface of the worktable, and the two screw conveyors are driven by the drive device.

[0008] According to the phosphate ester flame retardant twin-screw granulator of the present invention, the cutting assembly includes: a support, a motor, and a blade. The support is fixedly connected to the front end of the extrusion tube, the motor is fixedly connected to the inner surface of the support, and the blade is rotatably connected to the front end of the extrusion tube and is driven by the motor.

[0009] According to the phosphate ester flame retardant twin-screw granulator of the present invention, the gas conveying assembly includes: a gas box and a fan. The gas box is connected to and fixedly connected to the side surface of the annular gas conveying box, and the fan is embedded in the side surface of the gas box.

[0010] According to the phosphate ester flame retardant twin-screw granulator of the present invention, the pushing component includes: a support frame and an electric push rod. The support frame is fixedly connected to the lower surface of the annular gas delivery box, and the electric push rod is fixedly connected between the support frame and the feeding frame.

[0011] Beneficial effects:

[0012] This technical solution utilizes a twin-screw granulator for phosphate flame retardants. The annular gas delivery box and gas delivery assembly work together, supplying gas to the gas chamber via a fan. The gas is blown through the air holes in the annular gas delivery box and the feeding frame onto the newly formed granules, achieving rapid cooling and shaping, preventing the phosphate ester granules from sticking together. The pushing assembly, driven by an electric push rod, drives the feeding frame in rapid reciprocating motion, accelerating the discharge of granules from the sieve holes. Simultaneously, the airflow further separates the granules during the motion to prevent sticking, improving feeding smoothness and enhancing product quality and production efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is a front view structural diagram of the twin-screw granulator for phosphate ester flame retardants of this utility model;

[0015] Figure 2 This is an enlarged structural diagram of the cutting assembly of the twin-screw granulator for phosphate ester flame retardants of this invention;

[0016] Figure 3 This is a right-side cross-sectional view of the twin-screw granulator for the phosphate ester flame retardant of this utility model.

[0017] Figure 4 This is a partially enlarged right-side cross-sectional view of the twin-screw granulator for phosphate ester flame retardants of this invention.

[0018] Figure 5 This is a top cross-sectional view of the twin-screw granulator for the phosphate ester flame retardant of this invention.

[0019] Figure 6 This is a rear view of the twin-screw granulator for the phosphate ester flame retardant of this invention.

[0020] Legend:

[0021] 1. Feed pipe; 2. Extrusion pipe; 3. Annular air box; 4. Air chamber; 5. Worktable; 6. Fan; 7. Discharge hole; 8. Motor; 9. Support; 10. Blade; 11. Screwdriver; 12. Feed frame; 13. Air hole; 14. Screen hole; 15. Electric push rod; 16. Support frame; 17. Drive device; 18. Heating plate; 19. Insulation plate. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Reference Figure 1-6 This utility model provides a twin-screw granulator for phosphate ester flame retardants, comprising: a workbench 5. Considering the basic requirement that phosphate ester flame retardants need to be melt-extruded into granules, an extrusion pipe 2 is fixedly connected to the upper surface of the workbench 5. A feed pipe 1 is connected to the upper surface of the extrusion pipe 2. A heating plate 18 is fixedly connected to the outer wall of the extrusion pipe 2. Two screw conveyors 11 are rotatably connected to the inner surface of the extrusion pipe 2. Multiple discharge holes 7 are provided at the front end of the extrusion pipe 2. The raw material enters the extrusion pipe 2 through the feed pipe 1. The heating plate 18 heats the material to melt it. The screw conveyors 11 rotate to transport and mix the material and then extrude it from the discharge holes 7 to achieve the effect of material plasticization and preliminary forming.

[0024] Considering the need for rapid cooling and anti-sticking of newly formed particles, an annular gas delivery box 3 is embedded in the workbench 5. A gas delivery component is provided on the side surface of the annular gas delivery box 3. The gas delivery component includes an air box 4 and a fan 6. The air box 4 is connected to and fixedly connected to the side surface of the annular gas delivery box 3. The fan 6 is embedded in the side surface of the air box 4. The fan 6 supplies gas to the air box 4. The gas is blown onto the particles through the air holes 13 of the annular gas delivery box 3 to achieve rapid cooling of the particles and achieve the anti-sticking effect.

[0025] Considering the need for precise application of cooling airflow to the particles and the need for particle collection and guidance, a feeding frame 12 is connected inside the annular air supply box 3. The feeding frame 12 is located below the discharge hole 7. Both the feeding frame 12 and the annular air supply box 3 are provided with air holes 13. A sieve hole 14 is provided at the bottom of the feeding frame 12. Gas is blown into the internal contact particles through the air holes 13 of the feeding frame 12. The particles are temporarily stored in the frame and discharged through the sieve hole 14, thereby achieving enhanced cooling and guiding feeding effects.

[0026] Considering the problems of easy particle accumulation and blockage, and low feeding efficiency, a pushing component is provided on the lower surface of the annular air conveying box 3. The pushing component includes a support frame 16 and an electric push rod 15. The support frame 16 is fixedly connected to the lower surface of the annular air conveying box 3, and the electric push rod 15 is fixedly connected between the support frame 16 and the feeding frame 12. The electric push rod 15 drives the feeding frame 12 to reciprocate, accelerating the discharge of particles from the screen holes, thereby achieving the effect of preventing blockage and efficient feeding.

[0027] In summary, the improvement of this embodiment lies in:

[0028] The annular gas delivery box works in conjunction with the gas delivery component to supply gas to the gas box 4 via the fan 6. The gas is blown onto the newly formed particles through the air holes 13 of the annular gas delivery box 3 and the feeding frame 12, achieving rapid cooling and shaping, and preventing the phosphate ester particles from sticking together. The pushing component drives the feeding frame 12 to move back and forth rapidly via the electric push rod 15, accelerating the discharge of particles from the screen holes 14. At the same time, the airflow further separates the particles during the movement to prevent sticking, improves the smoothness of feeding, and improves product quality and production efficiency.

[0029] Based on the above, other structures also need to be disclosed in detail, such as:

[0030] Reference Figure 1 Considering the heat loss of the heating plate 18 and the risk of burns to operators, a heat insulation plate 19 is fixedly connected to the side surface of the heating plate 18. The heat insulation plate 19 blocks heat transfer, reduces energy loss, and prevents burns to personnel, thus achieving energy saving and safety protection.

[0031] Reference Figure 6 Considering that the auger 11 needs stable power to ensure the uniformity of material conveying, a drive device 17 is fixedly connected to the rear surface of the workbench 5. The two augers 11 are driven by the drive device 17, which provides power to make the augers rotate synchronously, ensuring that the material is mixed evenly and conveyed stably, thus achieving the effect of material homogenization.

[0032] Specifically: the drive unit 17 consists of a motor and a gearbox. The motor provides the original power, and the gearbox transmits the power synchronously to the two augers through gear meshing. The drive unit of the auger 11 is a mature existing technology, which is well known to those skilled in the art, so it will not be described in detail in this article.

[0033] Reference Figure 2Considering the need to cut the extruded material into uniform particles, a cutting assembly is provided at the front end of the extrusion tube 2. The cutting assembly includes a support 9, a motor 8, and a blade 10. The support 9 is fixedly connected to the front end of the extrusion tube 2, the motor 8 is fixedly connected to the inner surface of the support 9, and the blade 10 is rotatably connected to the front end of the extrusion tube 2. The blade 10 is driven by the motor 8, which drives the blade 10 to rotate and cut the material extruded from the discharge hole 7 into particles, achieving the effect of particle shaping and uniform size.

[0034] Working principle: When this twin-screw granulator for phosphate flame retardant is working, the raw material enters the extrusion pipe 2 through the feed pipe 1, and the worktable 5 provides stable support for the overall structure;

[0035] Heating plate 18 heats extrusion tube 2 to melt the material. Insulation plate 19 on its side surface reduces heat loss and prevents burns. At the same time, drive device 17 on the rear surface of workbench 5 drives two screw conveyors 11 to rotate synchronously, mix and convey the molten material, and ensure that the material is uniform before being extruded from multiple discharge holes 7 at the front end of extrusion tube 2.

[0036] The extruded material is processed by the cutting assembly, where the motor 8 drives the blade 10 to rotate, cutting the material into granules;

[0037] The particles fall into the feeding frame 12 located below the discharge hole 7. At this time, the air conveying component starts to work. The blower 6 supplies air to the air box 4. The gas is blown towards the particles through the annular air conveying box 3 and the air hole 13 on the feeding frame 12 to achieve rapid cooling and prevent sticking.

[0038] Meanwhile, the electric push rod 15 of the pushing component drives the feeding frame 12 to reciprocate under the support of the support frame 16, which accelerates the discharge of particles from the bottom screen hole 14. During the movement, the airflow further separates the particles to avoid accumulation and blockage.

[0039] The entire process, from feeding to melting and mixing to extrusion and cutting to cooling and separation to efficient feeding, enables the efficient and high-quality production of phosphate ester flame retardant granules.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A twin-screw granulator for phosphate ester flame retardants, comprising: A workbench (5) is provided, on the upper surface of which an extrusion tube (2) is fixedly connected. The upper surface of the extrusion tube (2) is connected to a feed tube (1). A heating plate (18) is fixedly connected to the outer wall of the extrusion tube (2). Two augers (11) are rotatably connected to the inner surface of the extrusion tube (2). Multiple discharge holes (7) are provided at the front end of the extrusion tube (2). A cutting assembly is provided at the front end of the extrusion tube (2). The workbench (5) is characterized by the following features: An annular air supply box (3) is embedded in the workbench (5). An air supply component is provided on the side surface of the annular air supply box (3). A feeding frame (12) is connected inside the annular air supply box (3). The feeding frame (12) is located below the discharge hole (7). Air holes (13) are provided on both the feeding frame (12) and the annular air supply box (3). A sieve hole (14) is provided at the bottom of the feeding frame (12). A pushing component is provided on the lower surface of the annular air supply box (3).

2. The twin-screw granulator for phosphate ester flame retardant according to claim 1, characterized in that, A heat insulation plate (19) is fixedly connected to the side surface of the heating plate (18).

3. The twin-screw granulator for phosphate ester flame retardant according to claim 2, characterized in that, A drive device (17) is fixedly connected to the rear surface of the workbench (5), and the two screw conveyors (11) are driven by the drive device (17).

4. The twin-screw granulator for phosphate ester flame retardant according to claim 1, characterized in that, The cutting assembly includes: a bracket (9), a motor (8), and a blade (10). The bracket (9) is fixedly connected to the front end of the extrusion tube (2). The motor (8) is fixedly connected to the inner surface of the bracket (9). The blade (10) is rotatably connected to the front end of the extrusion tube (2). The blade (10) is driven by the motor (8).

5. The twin-screw granulator for phosphate ester flame retardant according to claim 1, characterized in that, The gas delivery assembly includes: a gas box (4) and a fan (6). The gas box (4) is connected to and fixedly connected to the side surface of the annular gas delivery box (3), and the fan (6) is embedded in the side surface of the gas box (4).

6. The twin-screw granulator for phosphate ester flame retardant according to claim 1, characterized in that, The pushing component includes: a support frame (16) and an electric push rod (15). The support frame (16) is fixedly connected to the lower surface of the annular air supply box (3), and the electric push rod (15) is fixedly connected between the support frame (16) and the unloading frame (12).

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