CN220261918U - Double-screw extruder with limiting function - Google Patents

Abstract

The utility model relates to the technical field of double-screw extruders, and discloses a double-screw extruder with a limiting function, which comprises a bottom frame and supporting plates, wherein the supporting plates are vertically and symmetrically and fixedly arranged on two sides of the top of the bottom frame, the tops of the two supporting plates are fixedly provided with the same conveying machine barrel, second screws are symmetrically arranged in the conveying machine barrel in a rotating mode, one side of the conveying machine barrel is provided with a first driving mechanism for driving the two second screws to rotate, one side of the conveying machine barrel is also provided with a die head, the die head is fixedly arranged on one side of the conveying machine barrel, a sliding groove is formed in the bottom frame, and a limiting support block is arranged in the sliding groove in a sliding mode. According to the utility model, through the arrangement of the hopper, the screw rod and the conical blade, the double-screw extruder is fully mixed and stirred before heating the mixed powder, so that the problem that the materials after heating and extrusion are not fully mixed is avoided.

Description

Double-screw extruder with limiting function

Technical Field

The utility model relates to the technical field of double-screw extruders, in particular to a double-screw extruder with a limiting function.

Background

The double-screw extruder is developed on the basis of a single-screw extruder, and has been widely applied to the molding processing of extruded products due to the characteristics of feeding performance, exhaust performance, extrusion stability and the like.

The existing double-screw extruder has some defects in the mixing technology of mixed powder, and the existing double-screw extruder does not have a stirring mechanism for stirring the mixed powder before feeding, so that the mixed powder cannot be effectively mixed and stirred before processing, and therefore, the full mixing effect of the double-screw extruder in the mixing processing process cannot be achieved, most of defects generated after uneven mixing are caused, and the production yield of the double-screw extruder in production is affected.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a double-screw extruder with a limiting function.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a double screw extruder with spacing function, includes underframe and backup pad, the vertical symmetry fixed mounting of backup pad is in underframe top both sides, two backup pad top fixed mounting has same conveying barrel, conveying barrel internal symmetry rotates and is provided with the second screw rod, conveying barrel one side is provided with the first actuating mechanism that drives two second screw rods rotation, conveying barrel one side still is provided with the mould head, mould head fixed mounting is in conveying barrel one side, underframe internally provided with the spout, sliding mounting has spacing supporting shoe in the spout, underframe top symmetry is provided with the second actuating mechanism that drives spacing supporting shoe and slide from top to bottom, conveying barrel top one side vertical fixed mounting has the feeder box, feeder box one side fixed mounting has the feeder barrel, feeder barrel other end bottom fixed mounting has the extension board, and extension board bottom fixed mounting is in conveying barrel top surface, feeder barrel internal symmetry rotates and is provided with first screw rod, feeder barrel one side is provided with the third actuating mechanism that drives two first screw rods rotation, vertical blade fixed mounting has the top blade, two hopper drive screw rods fixed mounting have, the first side of blade drive hopper is equipped with the horizontal hopper, the tip is equipped with the horizontal bevel gear of two side of screw hopper, the feed hopper is equipped with the horizontal rotation, the feed hopper is equipped with the top is equipped with the hopper, the horizontal rotary hopper is equipped with the top of two side of loading hopper, the feed hopper is equipped with the horizontal rotation, and the feed hopper is equipped with the top and the horizontal rotary hopper is installed respectively, and a sixth driving mechanism for driving the first driving mechanism, the third driving mechanism and the fourth driving mechanism is arranged on one side of the top of the bottom frame.

Further, the first driving mechanism includes: the two fifth belt pulleys are respectively rotatably arranged at two ends of the interior of the fifth belt, shaft rods are horizontally and fixedly arranged at the center of one side of each fifth belt pulley, and the two shaft rods are respectively rotatably arranged at the center of one end of each second screw rod.

Further, the second driving mechanism includes: the electric telescopic rod and the support plate, the vertical fixed mounting of support plate is in underframe top one side, spacing piece top level fixed mounting has the connecting plate, the vertical fixed mounting of electric telescopic rod is in support plate top center department, electric telescopic rod drive shaft fixed mounting is in connecting plate top middle department.

Further, the third driving mechanism includes: the belt conveyer comprises a third belt and third belt wheels, wherein the third belt wheels are respectively and rotatably arranged at two ends of the inside of the third belt, shaft rods are horizontally and fixedly arranged at the center of one side of each third belt wheel, and the shaft rods are respectively and rotatably arranged at the center of one end of each first screw rod.

Further, the fourth driving mechanism includes: the fixed vertical plate is arranged at the top of the charging basket in a vertical and fixed mode, one end center of the second bevel gear is rotatably arranged on one side of the fixed vertical plate through a shaft rod, second belt wheels are arranged inside two ends of the second belt, shaft rods are horizontally and fixedly arranged at the center of one side of each second belt wheel, the two shaft rods are rotatably arranged at the centers of one side of the fixed vertical plate and one side of each third belt wheel respectively, and the first bevel gear and the second bevel gear are meshed with each other.

Further, the fifth driving mechanism includes: the automatic feeding device comprises a first gear and a second gear, wherein a fixed plate is vertically arranged at the top of a bottom frame, the center of one side of the first gear is rotationally arranged on one side of the fixed plate through a shaft rod, the fixed plates are vertically symmetrically arranged on two sides of the top of the bottom frame, a connecting rod is rotationally arranged between the fixed plates, a first belt is arranged on one side of a charging basket, first belt wheels are respectively arranged at two ends of the inside of the first belt, a shaft rod is fixedly arranged at the center of one side of the first belt wheels in a horizontal mode, and the shaft rods are rotationally arranged on one end of a screw rod and one side of the fixed plate respectively.

Further, the center of one side of the second gear is rotatably arranged on one side of the fixed plate through the shaft rod, the fixed plate is vertically arranged on one side of the top of the bottom frame, a first driving motor is horizontally and fixedly arranged on one side of the fixed plate, an output shaft of the first driving motor is arranged at the center of the top end of the shaft rod, and the first gear and the second gear are meshed with each other.

Further, the sixth driving mechanism includes: the four belt pulleys are respectively rotatably arranged at two ends inside the fourth belt, shaft rods are horizontally and fixedly arranged at the center of one side of each of the four belt pulleys, the shaft rods are respectively rotatably arranged at the center of one side of each of the third belt pulley and the center of one side of each of the fifth belt pulley, a vertical plate is vertically and fixedly arranged at the top of the bottom frame, a second driving motor is horizontally and fixedly arranged at one side of each vertical plate, and an output shaft of the second driving motor is arranged at the center of one side of each of the fifth belt pulleys.

Further, the top and the bottom of the conveyor cylinder are respectively and fixedly provided with a second heating plate, the two sides of the conveyor cylinder are respectively and fixedly provided with a first heating plate, the bottom of the bottom frame is fixedly provided with casters, and the casters are uniformly arranged on the two sides of the bottom frame at equal intervals.

The beneficial effects of the utility model are as follows:

1. according to the utility model, through the arrangement of the hopper, the screw rod and the conical blades, the double-screw extruder is fully mixed and stirred before heating the mixed powder, so that the problem that the materials after heating and extrusion are not fully mixed is avoided, and the mixed powder is more uniformly mixed.

2. According to the utility model, through the arrangement of the electric telescopic rod, the connecting plate and the limiting support block, the double-screw extruder can move the equipment through the truckles by lifting the limiting support when the double-screw extruder needs to move, and in the working state of the equipment, the limiting support is put down to limit the height of the equipment, so that the equipment is completely fixed at the current position, and the working state of the equipment is more stable.

Drawings

FIG. 1 is a schematic diagram of a twin-screw extruder with a limiting function according to the present utility model;

fig. 2 is a schematic left-view structure diagram of a double-screw extruder with a limiting function according to the present utility model;

fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 is a schematic rear view of a double screw extruder with a limiting function according to the present utility model;

fig. 5 is a schematic diagram of a right-side view structure of a twin-screw extruder with a limiting function according to the present utility model;

fig. 6 is an enlarged schematic view of the portion B in fig. 5.

In the figure: 1. a bottom frame; 2. a support plate; 3. a conveyor barrel; 4. a first heating plate; 5. a second heating plate; 6. a die head; 7. a charging barrel; 8. a hopper; 9. an electric telescopic rod; 10. a support plate; 11. a connecting plate; 12. limiting support blocks; 13. a first gear; 14. a second gear; 15. a feeder barrel; 16. a first belt; 17. a first pulley; 18. a first bevel gear; 19. a second bevel gear; 20. a first screw; 21. conical blades; 22. a screw rod; 23. a feeding box; 24. a first driving motor; 25. a second driving motor; 26. a second screw; 27. a second belt; 28. a third pulley; 29. a second pulley; 30. a fourth pulley; 31. a fourth belt; 32. a fifth pulley; 33. a fifth belt; 34. and a third belt.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-6, a twin screw extruder with limiting function comprises a bottom frame 1 and a supporting plate 2, wherein the supporting plate 2 is vertically and symmetrically and fixedly arranged on two sides of the top of the bottom frame 1, the tops of the two supporting plates 2 are fixedly provided with a same conveying cylinder 3, a second screw 26 is symmetrically and rotatably arranged in the conveying cylinder 3, one side of the conveying cylinder 3 is provided with a first driving mechanism for driving the two second screws 26 to rotate, one side of the conveying cylinder 3 is also provided with a die head 6, the die head 6 is fixedly arranged on one side of the conveying cylinder 3, a chute is arranged in the bottom frame 1, a limiting support block 12 is slidably arranged in the chute, the top of the bottom frame 1 is symmetrically provided with a second driving mechanism for driving the limiting support block 12 to slide up and down, one side of the top of the conveying cylinder 3 is vertically and fixedly provided with a feeding box 23, one side of the feeding box 23 is fixedly provided with a feeding cylinder 15, the bottom of the other end of the feeding machine barrel 15 is fixedly provided with a support plate, the bottom end of the support plate is fixedly arranged on the top surface of the feeding machine barrel 3, first screw rods 20 are symmetrically arranged in the feeding machine barrel 15 in a rotating way, one side of the feeding machine barrel 15 is provided with a third driving mechanism for driving the two first screw rods 20 to rotate, one side of the top of the feeding machine barrel 15 is vertically and fixedly provided with a charging barrel 7, the inside of the top end of the charging barrel 7 is vertically and rotatably provided with a conical blade 21, the top end of the conical blade 21 is rotatably provided with a shaft lever, the other end of the shaft lever passes through the top end of the charging barrel 7 and is rotatably connected with the charging barrel 7, the top end of the shaft lever is fixedly provided with a first bevel gear 18, one side of the charging barrel 7 is provided with a fourth driving mechanism for driving the conical blade 21 to rotate, two sides of the charging barrel 7 are horizontally and symmetrically provided with charging hoppers 8, the bottoms of the two charging hoppers 8 are respectively horizontally rotated and provided with spiral rods 22, the two sides of the two charging hoppers 8 are respectively provided with a fifth driving mechanism for driving the screw rods 22 to rotate, one side of the top of the bottom frame 1 is provided with a sixth driving mechanism for driving the first driving mechanism, the third driving mechanism and the fourth driving mechanism, the top and the bottom of the conveying machine barrel 3 are respectively and fixedly provided with a second heating plate 5, the two sides of the conveying machine barrel 3 are respectively and fixedly provided with a first heating plate 4, the bottom of the bottom frame 1 is fixedly provided with casters, and the casters are uniformly arranged on the two sides of the bottom frame 1 at equal intervals.

Referring to fig. 1-6, the first driving mechanism includes: the fifth belt 33 and the fifth belt pulley 32, the fifth belt pulley 32 has two and rotates and install respectively in the inside both ends of fifth belt 33, two horizontal fixed mounting has the axostylus axostyle in the center department of one side of two fifth belt pulleys 32, and two axostylus axostyle rotate respectively and install in two second screw rod 26 one end center departments, drive second screw rod 26 and carry the powder of heating to the conveyer barrel 3 the inside.

Referring to fig. 1-6, the second driving mechanism includes: the electric telescopic rod 9 and the support plate 10, the support plate 10 is vertically and fixedly arranged on one side of the top of the bottom frame 1, the connecting plate 11 is horizontally and fixedly arranged on the top of the limiting support block 12, the electric telescopic rod 9 is vertically and fixedly arranged at the center of the top of the support plate 10, the driving shaft of the electric telescopic rod 9 is fixedly arranged in the middle of the top of the connecting plate 11, and when the equipment needs to be moved or fixed, the electric telescopic rod 9 can be started to drive the limiting support block 12 to move up and down so as to carry out movement and fixed limiting positioning on the truckles passing through the bottom frame 1 of the equipment.

Referring to fig. 1-6, the third driving mechanism includes: the third belt 34 and the third belt pulley 28, the third belt pulley 28 has two and rotates the both ends of installing in the inside of third belt 34 respectively, two third belt pulley 28 one side center department all level fixed mounting have the axostylus axostyle, two axostylus axostyle rotate the center department of installing in two first screw rod 20 one end respectively, drive first screw rod 20 carries the powder of the material feeding barrel 15 the inside.

Referring to fig. 1 to 6, the fourth driving mechanism includes: the fixed vertical plate is vertically and fixedly arranged at the top of the charging bucket 7, one end center of the second bevel gear 19 is rotatably arranged on one side of the fixed vertical plate through a shaft rod, second belt pulleys 29 are arranged inside two ends of the second belt 27, shaft rods are horizontally and fixedly arranged at the centers of one sides of the two second belt pulleys 29, the two shaft rods are rotatably arranged at the centers of one side of the fixed vertical plate and one side of the third belt pulley 28 respectively, and the first bevel gear 18 and the second bevel gear 19 are meshed with each other to convey powder entering the charging bucket 7 through the charging hopper 8.

Referring to fig. 1-6, the fifth driving mechanism includes: the utility model provides a feeding hopper 8 bottom powder feeding hopper 7 the inside is gone into to first gear 13 and second gear 14, the fixed plate is installed vertically at underframe 1 top, first gear 13 one side center department passes through the axostylus axostyle rotation to be installed in fixed plate one side, fixed plate vertical symmetry installs in underframe 1 top both sides, rotate between two fixed plates and install the connecting rod, bucket 7 one side is equipped with first belt 16, first belt 16 inside both ends all are equipped with first pulley 17, two equal horizontal fixed mounting in first pulley 17 one side center department have the axostylus axostyle, two axostylus axostyle rotate respectively and install in hob 22 one end and fixed plate one side, second gear 14 one side center department passes through axostylus axostyle rotation and installs in fixed plate one side, fixed plate vertical installation is in underframe 1 top one side, fixed plate one side horizontal fixed mounting has first driving motor 24, the output shaft of first driving motor 24 is installed in axostylus axostyle top center department, first gear 13 and second gear 14 intermeshing, drive hob 22 carries the powder feeding hopper 8 bottom the inside to the bucket 7.

Referring to fig. 1 to 6, the sixth driving mechanism includes: the four pulleys 30 and the fourth belt 31, the four pulleys 30 are respectively and rotatably installed at two ends inside the fourth belt 31, shaft rods are horizontally and fixedly installed at the centers of one sides of the two fourth pulleys 30, the two shaft rods are respectively and rotatably installed at the centers of one side of the third pulley 28 and one side of the fifth pulley 32, a vertical plate is vertically and fixedly installed at the top of the bottom frame 1, a second driving motor 25 is horizontally and fixedly installed at one side of the vertical plate, and an output shaft of the second driving motor 25 is installed at the center of one side of the fifth pulley 32 to synchronously drive the linkage of the first driving mechanism, the third driving mechanism and the fourth driving mechanism.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: the equipment enters into an operating state, the first driving motor 24 and the second driving motor 25 rotate simultaneously, the first driving motor 24 rotates to drive the second gear 14 to rotate, the first gear 13 is meshed with the second gear 14, the second gear 14 rotates to drive the first gear 13 to rotate, the first gear 13 rotates to drive the first belt wheel 17 to rotate, the first belt wheel 17 rotates to drive the first belt wheel 16 and the screw rod 22 to rotate, the first belt wheel 16 and the screw rod 22 rotate to drive the powder of the hopper 8 to convey the powder into the charging basket 7, meanwhile, the second driving motor 25 rotates to drive the fifth belt wheel 32 to rotate, the fifth belt wheel 32 rotates to drive the fifth belt wheel 33 and the second screw rod 26 to rotate, the second screw rod 26 rotates to drive the powder to convey and heat the powder into the conveying barrel 3, the powder is extruded through the die head 6, the fifth belt wheel 32 rotates to drive the fourth belt wheel 30 to rotate, the rotation of the fourth belt wheel 30 drives the fourth belt 31 and the third belt wheel 28 to rotate, the rotation of the third belt wheel 28 drives the third belt 34 and the first screw rod 20 to rotate, the rotation of the first screw rod 20 drives powder materials in the feeding machine barrel 15 to be conveyed into the feeding box 23, then the powder materials enter the feeding machine barrel 3 through the feeding box 23, the rotation of the third belt wheel 28 also drives the second belt wheel 29 to rotate, the rotation of the second belt wheel 29 drives the second belt 27 and the second bevel gear 19 to rotate, the rotation of the second bevel gear 19 drives the first bevel gear 18 to rotate due to the meshing of the first bevel gear 18 and the second bevel gear 19, the rotation of the first bevel gear 18 drives the bevel blades 21 to rotate, and the rotation of the bevel blades 21 drives the powder materials conveyed through the feeding hoppers 8 at two ends to enter the charging barrel 7 and then enter the feeding machine barrel 15 at the bottom of the charging barrel 7;

when the equipment needs to be moved or fixed, the electric telescopic rod 9 can be started to drive the limiting support block 12 to move up and down so as to carry out moving and fixed limiting positioning on the casters passing through the equipment bottom frame 1.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (9)

1. The utility model provides a double screw extruder with spacing function, includes underframe (1) and backup pad (2), its characterized in that, vertical symmetry fixed mounting of backup pad (2) is in underframe (1) top both sides, two backup pad (2) top fixed mounting has same conveying barrel (3), conveying barrel (3) inside symmetry rotation is provided with second screw rod (26), conveying barrel (3) one side is provided with the first actuating mechanism that drives two second screw rods (26) pivoted, conveying barrel (3) one side still is provided with mould head (6), mould head (6) fixed mounting is in conveying barrel (3) one side, the spout has been seted up to the inside of underframe (1), sliding mounting has spacing supporting shoe (12) in the spout groove, conveying barrel (3) top one side vertical fixed mounting has feeder box (23), feeder box (23) one side fixed mounting has feeder barrel (15), feeder box (15) other end fixed mounting has in conveying barrel (15) top fixed mounting in the first barrel (20), the utility model provides a feeding barrel (15) one side is provided with two first screw rod (20) pivoted third actuating mechanism of drive, feeding barrel (15) top one side vertical fixed mounting has storage bucket (7), conical blade (21) are installed in the inside vertical rotation in storage bucket (7) top, the axostylus axostyle is installed in conical blade (21) top rotation, the axostylus axostyle other end passes storage bucket (7) top and rotates with storage bucket (7) to be connected, axostylus axostyle top fixed mounting has first bevel gear (18), storage bucket (7) one side is equipped with drive conical blade (21) pivoted fourth actuating mechanism, storage bucket (7) both sides horizontal symmetry is provided with loading hopper (8), two loading hopper (8) bottom horizontal rotation is provided with hob (22) respectively, two loading hopper (8) both sides all are equipped with drive hob (22) pivoted fifth actuating mechanism, bottom frame (1) top one side is equipped with drive first actuating mechanism, third actuating mechanism and fourth actuating mechanism.

2. The twin screw extruder with limit function of claim 1, wherein the first drive mechanism comprises: the belt conveyer comprises a fifth belt (33) and a fifth belt pulley (32), wherein the fifth belt pulley (32) is respectively and rotatably arranged at two ends of the inside of the fifth belt (33), shaft rods are horizontally and fixedly arranged at the center of one side of the fifth belt pulley (32), and the shaft rods are respectively and rotatably arranged at the centers of one ends of the two second screw rods (26).

3. The twin screw extruder with limit function of claim 2, wherein the second driving mechanism comprises: the electric telescopic rod (9) and the supporting plate (10), vertical fixed mounting of supporting plate (10) is in underframe (1) top one side, spacing piece (12) top level fixed mounting has connecting plate (11), vertical fixed mounting of electric telescopic rod (9) is in supporting plate (10) top center department, electric telescopic rod (9) drive shaft fixed mounting is in connecting plate (11) top centre department.

4. A twin screw extruder with a limiting function according to claim 3, wherein the third drive mechanism comprises: the belt conveyer comprises a third belt (34) and a third belt wheel (28), wherein the third belt wheel (28) is respectively and rotatably arranged at two ends of the inside of the third belt (34), a shaft lever is horizontally and fixedly arranged at the center of one side of the two third belt wheels (28), and the two shaft levers are respectively and rotatably arranged at the centers of one ends of the two first screw rods (20).

5. The twin screw extruder with limit function of claim 4, wherein the fourth driving mechanism comprises: the automatic feeding device comprises a first bevel gear (19) and a first belt (27), wherein a fixed vertical plate is arranged at the top of a charging basket (7), one end center of the first bevel gear (19) is rotatably arranged on one side of the fixed vertical plate through a shaft rod, two second belt wheels (29) are arranged inside two ends of the first belt (27), a shaft rod is horizontally and fixedly arranged at the center of one side of each second belt wheel (29), two shaft rods are rotatably arranged at the centers of one side of the fixed vertical plate and one side of each third belt wheel (28), and the first bevel gear (18) and the second bevel gear (19) are meshed with each other.

6. The twin screw extruder with limit function of claim 5, wherein the fifth driving mechanism comprises: the novel spiral conveyer comprises a first gear (13) and a second gear (14), wherein a fixed plate is vertically arranged at the top of a bottom frame (1), a shaft lever is rotatably arranged at the center of one side of the first gear (13) on one side of the fixed plate, the fixed plates are vertically and symmetrically arranged on two sides of the top of the bottom frame (1), a connecting rod is rotatably arranged between the fixed plates, a first belt (16) is arranged on one side of a charging basket (7), first belt wheels (17) are respectively arranged at two ends of the inside of the first belt (16), a shaft lever is fixedly arranged at the center of one side of the first belt wheels (17) horizontally, and the two shaft levers are rotatably arranged on one end of a screw rod (22) and one side of the fixed plate respectively.

7. The double-screw extruder with the limiting function according to claim 6, wherein the center of one side of the second gear (14) is rotatably arranged on one side of a fixed plate through a shaft rod, the fixed plate is vertically arranged on one side of the top of the bottom frame (1), a first driving motor (24) is horizontally and fixedly arranged on one side of the fixed plate, an output shaft of the first driving motor (24) is arranged at the center of the top end of the shaft rod, and the first gear (13) and the second gear (14) are meshed with each other.

8. The twin screw extruder with limit function of claim 7, wherein the sixth driving mechanism comprises: fourth band pulley (30) and fourth belt (31), fourth band pulley (30) have two and rotate respectively and install in fourth belt (31) inside both ends, two equal level fixed mounting in fourth band pulley (30) one side center department has the axostylus axostyle, two the axostylus axostyle rotates respectively and installs in third band pulley (28) one side center department and fifth band pulley (32) one side center department, the vertical fixed mounting in underframe (1) top has the riser, riser one side horizontal fixed mounting has second driving motor (25), the output shaft of second driving motor (25) is installed in fifth band pulley (32) one side center department.

9. The double-screw extruder with the limiting function according to claim 8, wherein the top and the bottom of the conveyor barrel (3) are respectively and fixedly provided with a second heating plate (5), the two sides of the conveyor barrel (3) are respectively and fixedly provided with a first heating plate (4), the bottom of the bottom frame (1) is fixedly provided with casters, and the casters are uniformly arranged on the two sides of the bottom frame (1) at equal intervals.