Feeding device for producing high-concentration flame-retardant master batch

Abstract

The utility model relates to the field of extruders, in particular to a feeding device for producing high-concentration flame-retardant master batches, a side feeding mechanism is arranged on the side of a barrel, the side feeding mechanism is positioned on the downstream of a main feeding hopper along the moving direction of materials in the barrel, the side feeding mechanism comprises a support, a double-screw conveyor which extends horizontally is mounted at the top of the support, and the double-screw conveyor is connected with the main feeding hopper. A side feeding hopper is fixedly installed at the top of the double-screw conveyor, a top cover is fixedly installed at the upper end of the side feeding hopper, a feeding port is formed in the top cover, and the feeding port is connected with a discharging port of the double-screw conveyor; a carrier of a high-concentration flame-retardant master batch is added into the cylinder body from the main feeding hopper, and a compound flame retardant is added into the cylinder body from each side feeding mechanism at the downstream of the main feeding hopper, so that the blockage in the cylinder body caused by adding a large amount of materials into the main feeding hopper at one time is avoided, and the retention time of the compound flame retardant in the cylinder body is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the extruding granulator field, concretely relates to a feeding device for producing high concentration flame retardant master batch. BACKGROUND

[0002] The high concentration flame retardant master batch has the characteristics of high flame retardant filling ratio and poor flowability, and the concentration of the flame retardant master batch is different from 50 to 80% according to different uses. The existing extruding granulator for producing the flame retardant master batch has the structure as shown in the figure, the extruding granulator is provided with a barrel 1, the barrel 1 is provided with a screw rod, and one end of the barrel 1 is provided with a main feeding hopper 2. Figure 1 The feeding method used in the usual flame retardant master batch production is that: the compounded flame retardant and the carrier are high-speed blended according to a certain proportion, and then the compounded flame retardant and the carrier after mixing are transferred to the main feeding hopper 2 of the extruding granulator for discharging, extruding and granulating. For the production of the flame retardant master batch with low concentration (within 60%), the compounded flame retardant has a low addition amount, and has little influence on the melt index of the flame retardant master batch, so the method is convenient to operate and control and easy to realize.

[0003] For the production of the flame retardant master batch with high concentration (the concentration is greater than 70%), the traditional method is used, the compounded flame retardant has a high addition amount, the material in the barrel is easily blocked, the friction between the flame retardant master batch and the screw rod and the barrel is increased, the local temperature of the extruding granulator is increased, the operation of the extruding granulator is unstable, the compounded flame retardant stays in the extruding granulator for a long time at high temperature, the degradation of the compounded flame retardant is caused, the effective concentration of the flame retardant master batch is reduced, and the product quality of the flame retardant master batch with high concentration is influenced. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a feeding device for producing the flame retardant master batch with high concentration, the stability of the operation of the extruding granulator and the product quality of the flame retardant master batch with high concentration are improved by increasing the side feeding mechanism on the side of the extruding granulator, so as to solve the defects in the background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of feed device for producing high concentration flame retardant master batch, including extrusion granulator body, the barrel of horizontal arrangement is equipped with screw in the barrel, the top of one end of the barrel is equipped with main feed hopper;The side feed mechanism is equipped on the side of the barrel, the side feed mechanism is located downstream of the main feed hopper along the material movement direction in the barrel, the side feed mechanism includes support, the top of the support is equipped with horizontally extending double screw conveyor, one end of the double screw conveyor is equipped with discharge port, one end of the double screw conveyor is fixedly installed on the barrel and the discharge port of the double screw conveyor is connected with the inner cavity of the barrel, the top of the double screw conveyor is fixedly installed with side feed hopper, the lower end of the side feed hopper is connected with the inner cavity of the double screw conveyor, the upper end of the side feed hopper is fixedly installed with top cover, the top cover is equipped with feed inlet, the feed inlet is connected the discharge port of double screw conveyor.

[0007] As a further improvement, the side feed mechanism is provided with multiple groups, and the multiple groups of side feed mechanisms are uniformly spaced on the side of the barrel.

[0008] As a further improvement, the side feed hopper is provided with a stirring shaft driven by a stirring motor and rotating about its axis, and a plurality of stirring rods are fixedly installed on the stirring shaft, the stirring shaft extends vertically, and the stirring rods extend radially along the stirring shaft.

[0009] As a further improvement, one or more of the stirring rods are provided with a sleeve slidingly installed along the length direction thereof, a hammer head for knocking the inner wall of the side feed hopper is fixedly installed on the end of the sleeve away from the stirring shaft, and a spring for pushing the sleeve away from the stirring shaft is connected between the sleeve and the corresponding stirring rod; a ring plate coaxially arranged with the stirring shaft is fixedly installed on the bottom of the top cover, a push rod extending upward is fixedly installed on the sleeve, the upper end of the push rod extends to the inside of the ring plate, a plurality of arc-shaped protrusions are uniformly and spacedly arranged on the inner wall of the ring plate in the circumferential direction, and the push rod drives the sleeve to move towards the stirring shaft when the push rod contacts the arc-shaped protrusions.

[0010] As a further improvement, the support includes a bottom plate and a top plate located above the bottom plate, the double screw conveyor is installed on the top plate, a vertically extending outer tube is fixedly installed on the top of the bottom plate, a vertically extending inner tube is fixedly installed on the bottom of the top plate, the lower end of the inner tube is vertically and slidingly installed in the outer tube, a screw driven by an adjusting motor and rotating about its axis is installed in the outer tube, the screw extends vertically, and a nut matched with the screw is fixedly installed in the inner tube.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The carrier of high-concentration flame-retardant master batch is added into the barrel from the main feeding hopper, and the compounded flame retardant is added into the barrel from the side feeding mechanism downstream of the main feeding hopper, thereby avoiding the blockage of the barrel caused by adding a large amount of material to the main feeding hopper at one time, improving the stability of the operation of the extrusion granulator, reducing the residence time of the compounded flame retardant in the barrel, avoiding the degradation of the compounded flame retardant caused by long-time heating in the barrel, thereby ensuring the effective concentration of the flame-retardant master batch and improving the product quality;

[0013] 2. The side feeding hopper is provided with a stirring shaft driven by a stirring motor and rotating around its own axis, and the stirring shaft rotates to disperse the compounded flame retardant entering the side feeding hopper through the stirring rod, thereby avoiding the problems of mouse holes and wall sticking of the flame-retardant compounded agent in the side feeding hopper during the discharging process;

[0014] 3. The stirring shaft continuously rotates to repeatedly knock the inner wall of the side feeding hopper with multiple hammer heads, thereby efficiently knocking off the material adhering to the inner wall of the side feeding hopper, and the material in the side feeding hopper is discharged more cleanly;

[0015] 4. The adjusting motor rotates to drive the screw rod, the screw rod acts on the nut to drive the inner tube to slide up and down along the outer tube, and then the double-screw conveyor is raised or lowered through the top plate, so as to cooperate with different extrusion granulators. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic diagram of an existing extrusion granulator for producing flame-retardant master batch;

[0018] Figure 2 is a structural schematic diagram of an embodiment of the present application;

[0019] Figure 3 is a structural schematic diagram of the barrel of an embodiment of the present application;

[0020] Figure 4 is a structural schematic diagram of the side feeding mechanism of an embodiment of the present application;

[0021] Figure 5 is a structural schematic diagram of the side feeding hopper of an embodiment of the present application;

[0022] Figure 6 is Figure 5a local enlarged view of the part;

[0023] Figure 7 is a top view of the annular plate of the embodiment of the present application.

[0024] In the figure: 1-cylinder; 2-main feeding hopper; 3-extrusion die; 4-side feeding mechanism; 5-support; 6-double screw conveyor; 7-conveying pipe; 8-conveying channel; 9-conveying screw; 10-gear box; 11-conveying motor; 12-discharge port; 13-side feeding hopper; 14-top cover; 15-feeding port; 16-stirring motor; 17-stirring shaft; 18-stirring rod; 19-sleeve; 20-hammer head; 21-spring; 22-annular plate; 23-pushing rod; 24-arc-shaped protrusion; 25-bottom plate; 26-top plate; 27-outer pipe; 28-inner pipe; 29-adjusting motor; 30-screw rod; 31-nut; 32-side feeding hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] As shown in Figures 2 to 7 a feeding device for producing high-concentration flame-retardant master batch, comprising an extrusion granulator body, the extrusion granulator body is provided with a horizontally arranged cylinder 1, the cylinder 1 is provided with a screw rod, the right end of the cylinder 1 is connected with a power device for driving the screw rod to rotate, and the left end of the cylinder 1 is provided with an extrusion die 3.

[0027] The right end top of the cylinder 1 is provided with a main feeding hopper 2, the main feeding hopper 2 is used for adding a carrier of the high-concentration flame-retardant master batch into the cylinder 1. The side of the cylinder 1 is provided with a side feeding mechanism 4, the side feeding mechanism 4 is located downstream of the main feeding hopper 2 along the material movement direction in the cylinder 1, and the side feeding mechanism 4 is provided with multiple groups, and the multiple groups of side feeding mechanisms 4 are uniformly and interval arranged at the side of the cylinder 1. The side feeding mechanism 4 is used for adding a compounded flame retardant into the cylinder 1. The carrier of the high-concentration flame-retardant master batch is added into the cylinder 1 from the main feeding hopper 2, and the compounded flame retardant is added into the cylinder 1 from each side feeding mechanism 4 downstream of the main feeding hopper 2 according to a certain proportion, so that the cylinder 1 is prevented from being blocked due to adding a large amount of material into the main feeding hopper 2 at one time, the stability of the operation of the extrusion granulator is improved, the time length of the compounded flame retardant staying in the cylinder 1 is reduced, the degradation of the compounded flame retardant in the cylinder 1 due to long-time heating is avoided, the effective concentration of the flame-retardant master batch is ensured, and the product quality is improved.

[0028] As shown in Figure 4and Figure 5 As shown, the side feeding mechanism 4 includes a support 5. A horizontally extending twin-screw conveyor 6 is mounted on the top of the support 5. The twin-screw conveyor 6 has a horizontally extending conveying pipe 7. A conveying channel 8 is provided inside the conveying pipe 7. Two conveying screws 9 are arranged side by side in the conveying channel 8. A gearbox 10 is fixedly installed at one end of the conveying pipe 7. A conveying motor 11 is also installed on the gearbox 10. The conveying motor 11 is connected to the two conveying screws 9 through the gearbox 10. The conveying motor 11 drives the two conveying screws 9 to rotate, thereby moving the material along the conveying channel 8. A discharge port 12 is provided at the end of the conveying pipe 7 away from the gearbox 10. The end of the conveying pipe 7 away from the gearbox 10 is fixedly installed on the side of the cylinder 1 by bolts, and the discharge port 12 is connected to the inner cavity of the cylinder 1. Figure 3 As shown, the side wall of the cylinder 1 is provided with a side feed hole 32 that connects to the discharge port 12; a side feed hopper 13 is fixedly installed on the top of the conveying pipe 7 by bolts. The side feed hopper 13 is an inverted cone shape that is wider at the top and narrower at the bottom. The lower end of the side feed hopper 13 is connected to the conveying channel 8, and the upper end of the side feed hopper 13 is fixedly installed with a top cover 14 by bolts. The top cover 14 is provided with a feed inlet 15, which is connected to the discharge port of the loss-in-weight scale via a hose. The compound flame retardant is added to the side feed hopper 13 through the loss-in-weight scale. The compound flame retardant enters the conveying channel 8 in the conveying pipe 7 from the side feed hopper 13, and is then added to the cylinder 1 by the drive of the conveying screw 9.

[0029] like Figure 5 As shown, the side feeding hopper 13 is equipped with a stirring shaft 17 driven by a stirring motor 16 and rotating around its own axis. The stirring motor 16 is bolted to the top of the top cover 14. The rotating shaft of the stirring motor 16 extends downward into the side feeding hopper 13 and is coaxially connected to the upper end of the stirring shaft 17 via a coupling. Several stirring rods 18 are welded onto the stirring shaft 17. The stirring shaft 17 extends vertically, and the stirring rods 18 extend radially along the stirring shaft 17. In this embodiment, multiple groups of stirring rods 18 are evenly spaced vertically. Multiple stirring rods 18 in the same group are evenly spaced around the stirring shaft 17. Since the side feeding hopper 13 is an inverted cone shape with a wider upper end and a narrower lower end, the stirring rods 18 at the top are longer, and the stirring rods 18 at the bottom are shorter. The stirring motor 16 drives the stirring shaft 17 to rotate. When the stirring shaft 17 rotates, the stirring rod 18 disperses the compound flame retardant entering the side feeding hopper 13, thus preventing problems such as rat holes and sticking to the wall from occurring in the flame retardant compound in the side feeding hopper 13 during the feeding process.

[0030] like Figure 6As shown, the sleeve 19 is slidably installed on the uppermost group of stirring rods 18 along the length direction of the stirring rods 18. In order to prevent the sleeve 19 from rotating relative to the stirring rod 18, the stirring rod 18 is in a polygonal prism shape, the inner cavity of the sleeve 19 is in a shape matching the outer wall of the stirring rod 18, and the end of the sleeve 19 away from the stirring shaft 17 is closed. A hammer head 20 for knocking the inner wall of the side feeding hopper 13 is fixedly installed on the end of the sleeve 19 away from the stirring shaft 17 by a bolt. The hammer head 20 can be a rubber or silicone hammer head to prevent the side feeding hopper 13 from being damaged. A spring 21 for pushing the sleeve 19 away from the stirring shaft 17 is connected between the sleeve 19 and the corresponding stirring rod 18. The spring 21 is arranged in the sleeve 19, one end of the spring 21 abuts against the end of the stirring rod 18, and the other end of the spring 21 abuts against the inner wall of the end of the sleeve 19 away from the stirring shaft 17. The bottom of the top cover 14 is welded or fixedly installed with an annular plate 22 coaxially arranged with the stirring shaft 17. A push rod 23 extending upward is welded on the sleeve 19, and the upper end of the push rod 23 extends to the inner side of the annular plate 22. Figure 7 As shown, a plurality of arc-shaped protrusions 24 are uniformly and spacedly arranged on the inner wall of the annular plate 22 in the circumferential direction. When the push rod 23 contacts the arc-shaped protrusion 24, the arc-shaped protrusion 24 drives the sleeve 19 to move towards the stirring shaft 17.

[0031] During the rotation of the stirring shaft 17 driving the plurality of stirring rods 18, when the push rod 23 on the sleeve 19 rotates to contact the arc-shaped protrusion 24 on the inner wall of the annular plate 22, the arc-shaped protrusion 24 acts on the push rod 23 and drives the sleeve 19 to move towards the stirring shaft 17 and compresses the spring 21. The sleeve 19 drives the hammer head 20 to move towards the stirring shaft 17 and away from the inner wall of the side feeding hopper 13. When the push rod 23 on the sleeve 19 rotates to be separated from the arc-shaped protrusion 24, the spring 21 in the compressed state expands and drives the sleeve 19 to move away from the stirring shaft 17. The sleeve 19 drives the hammer head 20 to move away from the stirring shaft 17 and knock the inner wall of the side feeding hopper 13. Thus, when the stirring shaft 17 continuously rotates, the plurality of hammer heads 20 repeatedly knock the inner wall of the side feeding hopper 13, thereby efficiently shaking off the material adhering to the inner wall of the side feeding hopper 13, and the material in the side feeding hopper 13 is discharged more cleanly.

[0032] As shown, Figure 4As shown, the support 5 comprises a bottom plate 25 and a top plate 26 located above the bottom plate 25, the double screw conveyor 6 is installed on the top plate 26, the bottom of the bottom plate 25 is provided with moving wheels, which is convenient to move; the top of the bottom plate 25 is provided with a vertically extending outer tube 27 fixedly installed through bolts, the bottom of the top plate 26 is provided with a vertically extending inner tube 28 fixedly installed through bolts, the lower end of the inner tube 28 is vertically slidingly installed in the outer tube 27, the lower end of the outer tube 27 is provided with an adjusting motor 29 fixedly installed through bolts, the output end of the adjusting motor 29 is provided with an upward extending screw rod 30, the lower end of the inner tube 28 is provided with a nut 31 fixedly installed through bolts, which is matched with the screw rod 30. When the adjusting motor 29 works, the screw rod 30 rotates, the screw rod 30 acts on the nut 31, thereby driving the inner tube 28 to slide up and down along the outer tube 27, and then the top plate 26 drives the double screw conveyor 6 to rise or lower, so as to facilitate the cooperation of the side feeding mechanism 4 with different extruding granulators.

[0033] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A feeding device for producing high concentration flame retardant masterbatch, characterized in that: The extrusion granulator body is provided with a horizontally arranged barrel (1), a screw is arranged in the barrel (1), a main feeding hopper (2) is arranged at the top of one end of the barrel (1); a side feeding mechanism (4) is arranged on the side of the barrel (1), the side feeding mechanism (4) is located downstream of the main feeding hopper (2) along the material movement direction in the barrel (1), the side feeding mechanism (4) comprises a support (5), a horizontally extending double screw conveyor (6) is mounted at the top of the support (5), one end of the double screw conveyor (6) is provided with a discharge port (12), one end of the double screw conveyor (6) is fixedly mounted on the barrel (1), and the discharge port (12) of the double screw conveyor (6) is communicated with the inner cavity of the barrel (1), a side feeding hopper (13) is fixedly mounted at the top of the double screw conveyor (6), the lower end of the side feeding hopper (13) is communicated with the inner cavity of the double screw conveyor (6), a top cover (14) is fixedly mounted at the upper end of the side feeding hopper (13), and the top cover (14) is provided with a feeding port (15) connected with the discharge port (12) of the double screw conveyor (6).

2. A feeding device for producing high concentration flame retardant master batch as claimed in claim 1, wherein: A plurality of groups of the side feeding mechanism (4) are uniformly and interval arranged on the side of the barrel (1).

3. A feeding device for producing high concentration flame retardant master batch as claimed in claim 1, wherein: A stirring shaft (17) driven by a stirring motor (16) and rotating around its axis is arranged in the side feeding hopper (13), a plurality of stirring rods (18) are fixedly mounted on the stirring shaft (17), the stirring shaft (17) extends vertically, and the stirring rods (18) extend along the radial direction of the stirring shaft (17).

4. A feeding device for producing high concentration flame retardant masterbatch as claimed in claim 3, wherein: A sleeve (19) is slidingly mounted on one or more of the stirring rods (18) along the length direction thereof, a hammer head (20) for knocking the inner wall of the side feeding hopper (13) is fixedly mounted at the end of the sleeve (19) away from the stirring shaft (17), a spring (21) for pushing the sleeve (19) away from the stirring shaft (17) is connected between the sleeve (19) and the corresponding stirring rod (18); a ring-shaped plate (22) coaxially arranged with the stirring shaft (17) is fixedly mounted at the bottom of the top cover (14), an upward extending push rod (23) is fixedly mounted on the sleeve (19), the upper end of the push rod (23) extends to the inner side of the ring-shaped plate (22), a plurality of arc-shaped protrusions (24) are uniformly and interval arranged on the inner wall of the ring-shaped plate (22) in the circumferential direction, and the push rod (23) drives the sleeve (19) to move towards the stirring shaft (17) when the push rod (23) contacts the arc-shaped protrusions (24).

5. A feeding device for producing high concentration flame retardant master batch as claimed in claim 1, wherein: The support (5) comprises a bottom plate (25) and a top plate (26) above the bottom plate (25), the double screw conveyor (6) is installed on the top plate (26), the top of the bottom plate (25) is fixedly installed with a vertically extending outer tube (27), the bottom of the top plate (26) is fixedly installed with a vertically extending inner tube (28), the lower end of the inner tube (28) is vertically slidingly installed in the outer tube (27), a screw rod (30) driven by an adjusting motor (29) and rotating around its axis is installed in the outer tube (27), the screw rod (30) vertically extends, and a nut (31) matched with the screw rod (30) is fixedly installed in the inner tube (28).

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