Twin-screw extruder for plastic master batch production

Abstract

The utility model relates to the technical field of double-screw extruders, in particular to a double-screw extruder for plastic master batch production, which comprises an extruder main body, the top of the extruder main body is communicated with a feed hopper, a transverse pipe is arranged inside the feed hopper, two ends of the transverse pipe extend to the outside of the feed hopper, and the top of the feed hopper is communicated with an observation funnel. One end of the transverse pipe communicates with the observation funnel, the end, away from the observation funnel, of the transverse pipe is closed, a transverse stirring assembly is installed in the feeding hopper, and a driving assembly for driving the transverse stirring assembly to rotate is installed at the top of the extruder body; and the transverse stirring assembly comprises a rotating rod rotationally connected with the bottom of the transverse pipe, the rotating rod movably penetrates through the transverse pipe, and the top of the rotating rod is fixedly connected with a limiting block. The problems that when an existing double-screw extruder stirs raw materials, the raw materials are prone to being pushed to the side wall of a feeding hopper, the pressure of the raw materials on the feeding hopper is increased, and the probability of deformation and sinking of the feeding hopper is increased are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to double screw extruder technical field, concretely is a kind of double screw extruder for plastic masterbatch production. BACKGROUND

[0002] Double screw extruder is developed on the basis of single screw extruder, due to having good feeding performance, mixing plasticizing performance, exhaust performance, extrusion stability and other characteristics, has been widely applied to the forming processing of extruded product, by searching, the patent with application No.

[0003] Although the above device adds stirring structure in the feeding inlet, it can prevent the feeding inlet from being blocked, but the longitudinal rotating stirring structure is easy to push the raw materials to the sidewall of the feeding hopper when pushing the raw materials, increases the pressure of the raw materials to the feeding hopper, is easy to cause the deformation damage of the feeding hopper, makes the feeding not smooth, and the deformation recess of the feeding hopper also increases the resistance when the raw materials slide downward into the material, correspondingly increases the force acting on the stirring structure, also increases the possibility of damage of the stirring structure. UTILITY MODEL CONTENT

[0004] In view of the defects of the prior art, the utility model provides a double screw extruder for plastic masterbatch production, which solves the problem that the existing double screw extruder is easy to push the raw materials to the sidewall of the feeding hopper when stirring the raw materials, increases the pressure of the raw materials to the feeding hopper, and increases the probability of deformation of the feeding hopper.

[0005] To achieve the above object, the utility model provides the following technical scheme: a double screw extruder for plastic masterbatch production, which comprises an extruder main body, a feeding hopper communicated with the top of the extruder main body, a horizontal pipe extending to the outside of the feeding hopper at both ends, an observation funnel communicated with the top of the feeding hopper, the one end of the horizontal pipe communicated with the observation funnel, the one end of the horizontal pipe away from the observation funnel is closed, a horizontal stirring assembly is installed in the inside of the feeding hopper, and a driving assembly for driving the horizontal stirring assembly to rotate is installed on the top of the extruder main body.

[0006] The horizontal stirring assembly comprises a rotating rod rotatably connected with the bottom of the horizontal pipe, the rotating rod movably penetrates the horizontal pipe, the top of the rotating rod is fixedly connected with a limiting block, and two groups of coaxial stirring rods are fixedly connected to the outside of the rotating rod.

[0007] Preferably, the stirring rod comprises a straight block fixedly connected with the rotating rod, one end of the straight block away from the rotating rod is fixedly connected with an inclined block one, one end of the inclined block one away from the straight block is fixedly connected with an inclined block two, and the inclination angle of the inclined block two is greater than the inclination angle of the inclined block one.

[0008] Preferably, the driving assembly comprises a motor fixedly connected with the top of the extruder body, and the output end of the motor is movably extended into the inside of the transverse pipe, and a belt for transmitting the rotary rod and the output end of the motor is arranged in the inside of the transverse pipe.

[0009] Preferably, the inside of the observation funnel is provided with a transparent plate slidably connected with the inner wall of the observation funnel, and the bottom of the transparent plate is fixedly connected with a longitudinal ring.

[0010] Preferably, the inner wall of the observation funnel is fixedly connected with a cap, the height of the cap is higher than the height of the transverse pipe, the diameter of the cap decreases with the increase of the height, the top of the cap is provided with an observation opening, and the diameter of the observation opening is the same as the minimum diameter of the observation funnel.

[0011] Preferably, the inner wall of the feeding hopper is provided with a sliding groove on each side, the top of the sliding groove penetrates the feeding hopper, the inside of the sliding groove is provided with a sliding plate movably extended to the outside of the feeding hopper, the side of the sliding plate close to the rotary rod is fixedly connected with a plurality of trapezoidal blocks, and the top of the sliding plate is rotatably connected with a pull ring.

[0012] Compared with the prior art, the double-screw extruder for plastic master batch production has the following beneficial effects:

[0013] 1. The transverse stirring assembly can continuously stir the raw materials in the feeding hopper, prevents the raw materials from being blocked at the connecting position between the feeding hopper and the extruder body, guides the raw materials at the outer circle of the feeding hopper to move to the inner circle of the feeding hopper, reduces the extrusion degree of the raw materials in the feeding hopper to the side wall of the feeding hopper, and reduces the possibility that the feeding hopper is deformed and recessed after being extruded by the raw materials.

[0014] 2. The observation funnel and the transparent plate facilitate the observation of the working process of the extruder.

[0015] 3. The observation funnel and the transverse pipe can preheat the raw materials in the feeding hopper and accelerate the heating speed of the raw materials after entering the inside of the extruder.

[0016] 4. The cap can slow down the flow speed of the hot air in the observation funnel, slow down the heat dissipation speed in the extruder body, reduce the heat that passes through the cap and contacts the transparent plate, reduce the heat loss through the transparent plate to the outside, and reduce the damage of the hot air to the transparent plate.

[0017] 5. The sliding plate and the trapezoidal blocks can continuously drive the raw materials at the bottom of the feeding hopper to move longitudinally, change the tightness of the raw materials at the bottom of the feeding hopper, thereby assisting the raw materials to pass through the bottom of the feeding hopper, and preventing the raw materials from being blocked at the bottom of the feeding hopper. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0019] Figure 1 It is the overall structure schematic view of the utility model;

[0020] Figure 2 It is the structure schematic view of the utility model feed hopper and observation funnel;

[0021] Figure 3 It is the partial cutaway view of the utility model feed hopper and observation funnel;

[0022] Figure 4 It is the partial cutaway view of the utility model drive assembly and cross pipe;

[0023] Figure 5 It is the cross section view of the utility model stirring rod;

[0024] Figure 6 It is the partial cutaway view of the utility model observation funnel;

[0025] Figure 7 It is the structure schematic view of the utility model sliding plate.

[0026] In the figure: 1, extruder main body; 2, feed hopper; 3, cross pipe; 4, observation funnel; 5, transverse stirring assembly; 51, rotating rod; 52, limit block; 53, stirring rod; 531, straight block; 532, inclined block one; 533, inclined block two; 6, drive assembly; 61, motor; 62, belt; 7, transparent plate; 8, longitudinal ring; 9, bolt; 10, cap; 11, sliding plate; 12, trapezoidal block; 13, pull ring. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail hereinafter with reference to the drawings and embodiments, so that how the technical means is applied to solve the technical problems and achieve the technical effects of the present application can be fully understood and implemented.

[0028] In order to reduce the extrusion degree of the feed hopper side wall when stirring the raw materials in the feed hopper, Figures 1-6For an embodiment of the utility model, propose a kind of double-screw extruder for plastic masterbatch production, including extruder main body 1, the top of extruder main body 1 is connected with feed hopper 2, the inside of feed hopper 2 is equipped with the transverse pipe 3 extending to its outside at both ends, the top of feed hopper 2 is connected with observation hopper 4, one end of transverse pipe 3 is communicated with observation hopper 4, the end of transverse pipe 3 away from observation hopper 4 is closed, transverse stirring assembly 5 is installed in the inside of feed hopper 2, the top of extruder main body 1 is installed with the drive assembly 6 of driving transverse stirring assembly 5 rotation, transverse stirring assembly 5 includes the rotary rod 51 rotationally connected with the bottom of transverse pipe 3, rotary rod 51 is movably penetrated through transverse pipe 3, the top of rotary rod 51 is fixedly connected with limit block 52, the outside of rotary rod 51 is fixedly connected with two groups of coaxial stirring rod 53, stirring rod 53 includes the straight block 531 fixedly connected with rotary rod 51, one end of straight block 531 away from rotary rod 51 is fixedly connected with inclined block one 532, one end of inclined block one 532 away from straight block 531 is fixedly connected with inclined block two 533, the inclination angle of inclined block two 533 is greater than the inclination angle of inclined block one 532, when using, raw material is poured into feed hopper, then drive assembly 6 is started to drive rotary rod 51 rotation, in turn drives stirring rod 53 transverse rotation, refer to Figure 4 And Figure 5 , stirring rod 53 counterclockwise rotation, promote the transverse movement of raw material in the inside of feed hopper 2, so that the material at the junction of feed hopper 2 and extruder main body 1 is constantly moved, to prevent raw material from being blocked at the inlet.

[0029] When stirring rod 53 counterclockwise rotation, inclined block one 532 and inclined block two 533 move in two directions of up and down when promoting the raw material on its one side, also promote the raw material to move from the outer ring to the inner ring of feed hopper 2 along the inclined direction, because the inclination angle of inclined block two 533 of outer ring is greater than the inclination angle of inclined block one 532, the speed of inclined block two 533 promoting raw material to the inner ring inclined block one 532 exceeds the speed of inclined block one 532 promoting raw material to the more inner ring rotary rod 51, can guarantee that the raw material on inclined block one 532 will not be moved to the outer ring of feed hopper 2 by being promoted too fast in reverse through inclined block two 533, can constantly stir the raw material in the inside of feed hopper 2, prevent raw material from being blocked at the junction of feed hopper 2 and extruder main body 1, while guiding the raw material of outer ring of feed hopper 2 to move to the inner ring of feed hopper 2, reduce the extrusion degree of raw material in the inside of feed hopper 2 to the sidewall of feed hopper 2, reduce the possibility of raw material extrusion deformation and indentation of feed hopper 2.

[0030] In order to drive stirring rod 53 rotation and stir raw material, refer to Figure 4The driving assembly 6 comprises a motor 61 fixedly connected with the top of the extruder body 1, the output end of the motor 61 is movably extended into the inside of the horizontal pipe 3, the inside of the horizontal pipe 3 is provided with a belt 62 for driving the rotary rod 51 and the output end of the motor 61, in use, the motor 61 is started, the motor 61 drives the rotary rod 51 to rotate through the belt 62, and then drives the stirring rod 53 to rotate to stir the raw materials in the feeding hopper 2.

[0031] In order to conveniently observe the production situation in the inside of the extruder body 1, referring to Figure 2 and Figure 6 , the inside of the observation funnel 4 is provided with a transparent plate 7 slidably connected with the inner wall thereof, the bottom of the transparent plate 7 is fixedly connected with a longitudinal ring 8, one side of the observation funnel 4 is provided with a bolt 9 movably extended into the inside thereof, in use, the production situation in the inside of the extruder body 1 is observed from the transparent plate 7 through the observation funnel 4, in this process, the heat in the inside of the extruder body 1 will enter the observation funnel 4, the transparent plate 7 blocks the heat in the observation funnel 4 from dissipating to the outside, and the working personnel can conveniently observe the working process of the extruder.

[0032] After the heat in the inside of the extruder body 1 enters the observation funnel 4, the heat enters the feeding hopper 2 through the horizontal pipe 3, the hot air contacts the raw materials in the inside of the feeding hopper 2, and the raw materials in the inside of the feeding hopper 2 can be preheated, and the speed of the raw materials entering the inside of the extruder and being heated can be accelerated.

[0033] In order to reduce the dissipation of the heat in the inside of the extruder body 1, referring to Figure 6 , the inner wall of the observation funnel 4 is fixedly connected with a cap 10, the height of the cap 10 exceeds the height of the horizontal pipe 3, the diameter of the cap 10 decreases with the increase of the height, the top of the cap 10 is provided with an observation opening, the diameter of the observation opening is the same as the minimum diameter of the observation funnel 4, the observation funnel 4 in the shape of a funnel will slow down the flowing speed of the hot air in the extruder body 1 into the observation funnel 4 due to the gradually increasing diameter upward, the hot air entering the inside of the observation funnel 4 is blocked again by the cap 10, the diameter of the observation opening of the cap 10 is the same as the minimum diameter of the bottom of the observation funnel 4, the observation area of the extruder body 1 through the observation funnel 4 can be avoided to be blocked by the cap 10, and then enters the feeding hopper 2 through the horizontal pipe 3, the cap 10 not only slows down the flowing speed of the hot air in the observation funnel 4, thereby slowing down the dissipation speed of the heat in the extruder body 1, but also reduces the heat contacting the transparent plate 7 after passing through the cap 10, reduces the heat loss to the outside through the transparent plate 7, and reduces the damage of the hot air to the transparent plate 7.

[0034] In order to further reduce the possibility of the bottom of the feeding hopper 2 being blocked, referring to Figure 2 , Figure 3 and Figure 7The inner wall of the feeding hopper 2 is provided with a chute on both sides, the top of the chute penetrates the feeding hopper 2, the inside of the chute is provided with a sliding plate 11 which is movably extended to the outside of the feeding hopper 2, a plurality of trapezoidal blocks 12 are fixedly connected to the side of the sliding plate 11 close to the rotating rod 51, a pull ring 13 is rotatably connected to the top of the sliding plate 11, when the bottom of the feeding hopper 2 is blocked, the pull ring 13 is pulled up and down along the chute by the staff, the sliding plate 11 and the trapezoidal blocks 12 are driven to move up and down, the trapezoidal blocks 12 drive the part of the raw materials above to rise when rising, and drive the part of the raw materials below to fall when falling, the process is repeated, the raw materials at the bottom of the feeding hopper 2 are continuously driven to move longitudinally, the tightness of the raw materials at the bottom of the feeding hopper 2 is changed, so that the raw materials pass through the bottom of the feeding hopper 2, and the raw materials are prevented from being blocked at the bottom of the feeding hopper 2.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double screw extruder for producing plastic master batch, comprising an extruder body (1), a feeding hopper (2) being communicated with the top of the extruder body (1), characterized in that: The inside of the feeding hopper (2) is provided with a cross pipe (3) extending to the outside at both ends, the top of the feeding hopper (2) is communicated with an observation funnel (4), one end of the cross pipe (3) is communicated with the observation funnel (4), the end of the cross pipe (3) away from the observation funnel (4) is closed, the inside of the feeding hopper (2) is provided with a transverse stirring assembly (5), the top of the extruder body (1) is provided with a driving assembly (6) for driving the transverse stirring assembly (5) to rotate; The transverse stirring assembly (5) comprises a rotating rod (51) rotatably connected with the bottom of the cross pipe (3), the rotating rod (51) movably penetrates the cross pipe (3), the top of the rotating rod (51) is fixedly connected with a limiting block (52), and the outer side of the rotating rod (51) is fixedly connected with two coaxial stirring rods (53).

2. The twin-screw extruder for producing a plastic master batch according to claim 1, characterized in that: The stirring rod (53) comprises a straight block (531) fixedly connected with the rotating rod (51), one end of the straight block (531) away from the rotating rod (51) is fixedly connected with an inclined block one (532), one end of the inclined block one (532) away from the straight block (531) is fixedly connected with an inclined block two (533), and the inclination angle of the inclined block two (533) is greater than that of the inclined block one (532).

3. The twin-screw extruder for producing a plastic master batch according to claim 1, characterized in that: The driving assembly (6) comprises a motor (61) fixedly connected with the top of the extruder body (1), the output end of the motor (61) movably extends into the inside of the cross pipe (3), and the inside of the cross pipe (3) is provided with a belt (62) for transmitting the rotating rod (51) and the output end of the motor (61).

4. The twin-screw extruder for producing a plastic master batch according to claim 1, wherein: The inside of the observation funnel (4) is provided with a transparent plate (7) slidably connected with the inner wall thereof, the bottom of the transparent plate (7) is fixedly connected with a longitudinal ring (8), and one side of the observation funnel (4) is provided with a bolt (9) movably extending into the inside thereof.

5. The twin-screw extruder for producing a plastic master batch according to claim 4, wherein: The inner wall of the observation funnel (4) is fixedly connected with a cap (10), the height of the cap (10) exceeds the height of the cross pipe (3), the diameter of the cap (10) decreases with the increase of the height, the top of the cap (10) is provided with an observation opening, and the diameter of the observation opening is the same as the minimum diameter of the observation funnel (4).

6. The twin-screw extruder for producing a plastic master batch according to claim 1, wherein: The inner wall of the feeding hopper (2) is provided with a sliding groove on both sides, the top of the sliding groove penetrates the feeding hopper (2), the inside of the sliding groove is provided with a sliding plate (11) movably extending to the outside of the feeding hopper (2), a plurality of trapezoidal blocks (12) are fixedly connected to the side of the sliding plate (11) close to the rotating rod (51), and the top of the sliding plate (11) is rotatably connected with a pull ring (13).

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