Novel single-screw extruder for plastic processing

Abstract

The utility model provides a novel single screw extruder for plastic processing, which comprises a base and a support plate, the support plate is fixedly connected with the left end and the right end of the upper side of the base, and the upper end of the support plate is fixedly connected with an extrusion cylinder. According to the novel single-screw extruder for plastic processing, during plastic processing, firstly, a valve in a feeding hopper is closed, a box cover is opened, plastic particle raw materials are guided into a feeding box, a second motor and a heating rod are started, plastic particles in the feeding box are heated, meanwhile, the plastic particles are stirred till the plastic particles in the feeding box are completely melted, and then the plastic particles are extruded into the feeding box; a valve on the lower portion in the feeding hopper is opened, the liquid plastic raw materials flow into the extrusion barrel, meanwhile, an output shaft of the first motor is started to rotate, transmission is conducted through the speed reducer, auger blades on the inner side of the extrusion barrel are driven to rotate, and the liquid plastic raw materials entering the extrusion barrel are rightwards conveyed to an extrusion head for extrusion production.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic processing, specifically is novel single screw extruder for plastic processing. BACKGROUND

[0002] Single screw extruder is constituted by one screw rotating in the heated cylinder. Because of its simple structure, easy manufacturing, high processing efficiency and low price, it is widely used and is the most mature and most used type of extruder, which can process various plastic products such as blown film, extruded tube, pressed plate and drawn wire.

[0003] In the process of processing part of plastics, single screw extruder needs to be used, the existing single screw extruder cannot separate the plastic particle blocks adhered together, and cannot preheat the plastic particles in the hopper, the large-volume plastic particle blocks are not conducive to the melting of the single screw extruder, the plastic particles cannot be preheated, and when the plastic enters the heating cavity of the single screw extruder, it still needs a long time to heat, thereby reducing the processing efficiency of the single screw extruder.

[0004] As disclosed in Chinese patent CN213767096U, a kind of high-efficiency single screw extruder for plastic processing, solves the problem of low processing efficiency of the existing single screw extruder for plastic processing, the single screw extruder for plastic processing has the advantages of high processing efficiency, and is worth promoting.

[0005] However, toxic gases harmful to the human body are generated during the heating of plastic raw materials, and the hopper of the extruder is not closed, so the toxic gases generated during the heating process are directly discharged from the upper end, causing harm to nearby workers.

[0006] Therefore, it is urgent to provide a novel single screw extruder for plastic processing that can treat harmful gases during plastic processing. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a novel single screw extruder for plastic processing to solve the problem that the hopper of the extruder is not closed, and the toxic gases generated during the heating process are directly discharged from the upper end, causing harm to nearby workers.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a novel single screw extruder for plastic processing, including base and support plate, the upper left and right ends of the base are fixedly connected with the support plate, the upper end of the support plate is fixedly connected with an extrusion cylinder, the inner and outer ends of the extrusion cylinder are provided with an extrusion mechanism, the upper end of the extrusion cylinder is provided with a feeding mechanism, and the feeding mechanism is provided with a crushing mechanism.

[0009] The feeding mechanism comprises a feeding hopper fixedly connected to the left side of the upper end of the extrusion cylinder, a feeding box fixedly connected to the upper end of the feeding hopper, a box cover hingedly connected to the upper end of the feeding box, a handle fixedly connected to the upper side of the front end of the box cover, a fixed frame fixedly connected to the outer side of the lower end of the feeding box, a heating rod fixedly connected to the inner side of the fixed frame, a fixed plate fixedly connected to the inner side of the middle position of the feeding box, a second motor installed on the upper side of the middle position of the fixed plate, a shroud fixedly connected to the outer end of the second motor, a stirring shaft fixedly connected to the output shaft of the second motor, an exhaust pipe fixedly connected to the right end of the feeding box, a first rectangular frame connected to the inner right end of the exhaust pipe, a HEPA filter screen fixedly connected to the inner side of the first rectangular frame, a second rectangular frame connected to the inner left end of the exhaust pipe, an activated carbon filter screen fixedly connected to the inner side of the second rectangular frame, a threaded rod connected to the inner front end of the exhaust pipe, a rotating handle welded to the front end of the threaded rod, an air inlet pipe fixedly connected to the left end of the feeding box, a fan installed on the inner left end of the air inlet pipe, and a cover hingedly connected to the left side of the air inlet pipe.

[0010] Further improvements are that the extrusion mechanism comprises a speed reducer installed on the left side of the extrusion cylinder, a first motor installed on the left end of the speed reducer, and an auger blade installed on the right end of the speed reducer, the outer side of the auger blade being rotationally connected to the inner side of the extrusion cylinder, and a valve arranged at the inner lower end of the feeding hopper. Thus, the rotation of the output shaft of the first motor can drive the auger blade on the inner side of the extrusion cylinder to rotate and transport the liquid plastic raw material into the extrusion cylinder to the right to the extrusion head.

[0011] Further improvements are that first through-slots are formed at the upper and lower ends of the right side of the exhaust pipe, second through-slots are formed at the upper and lower ends of the left side of the exhaust pipe, the outer sides of the upper and lower ends of the first rectangular frame are slidably connected to the inner sides of the first through-slots, the outer sides of the upper and lower ends of the second rectangular frame are slidably connected to the inner sides of the second through-slots, threaded grooves are formed at the inner front and middle positions of the first and second rectangular frames, a circular hole is formed at the middle position of the front of the exhaust pipe between the first and second through-slots, the outer side of the threaded rod is slidably connected to the inner side of the circular hole, and the rear outer side of the threaded rod is threadedly connected to the inner side of the threaded groove. Thus, after the first rectangular frame is slid into the first through-slots or the second rectangular frame is slid into the second through-slots, the threaded rod is passed through the circular hole and then threadedly connected to the threaded groove, the first rectangular frame can be fixed in the first through-slots or the second rectangular frame can be fixed in the second through-slots.

[0012] Further improvements are that the lower side of the box cover abuts against the upper side of the feeding box, and the right side of the cover abuts against the left side of the air inlet pipe. Thus, without external force, the box cover will be covered to the upper side of the feeding box to close the upper end of the feeding box, and the feeding box will be rotated to a vertical downward state due to gravity and located at the left side of the air inlet pipe to close the left end of the air inlet pipe.

[0013] Further improvement lies in that the inner side of the first and second through grooves formed inside the exhaust pipe is fixedly connected with rubber pads, so that the outer side of the upper and lower ends of the first and second rectangular frames contacts the rubber pads in the first or second through groove, so that the first and second through grooves can ensure tight closure after the first and second rectangular frames are installed.

[0014] Further improvement lies in that the crushing mechanism comprises an inclined plate fixedly connected to the upper inner side of the feeding box, and the rear side of the feeding box is provided with third motors at the left and right ends, the output shafts of the third motors are fixedly connected with rotating shafts at the front ends, and the outer side of the rotating shafts is fixedly connected with crushing rollers.

[0015] Further improvement lies in that the inclined plate is symmetrically and obliquely fixed to the left and right ends of the inner side of the feeding box above the crushing rollers, and the oblique direction is higher near the left and right ends of the feeding box and lower near the middle of the feeding box.

[0016] In summary, the application discloses a novel single-screw extruder for plastic processing.

[0017] The technical scheme can fix the first rectangular frame in the first through groove or the second rectangular frame in the second through groove by threading the threaded rods through the round holes and then screwing them into the threaded grooves after the first rectangular frame is slid into the first through groove or the second rectangular frame is slid into the second through groove, so that the positions of the HEPA filter screen and the activated carbon filter screen are fixed inside the exhaust pipe, the gas in the feeding box is filtered by the activated carbon filter screen and the HEPA filter screen in the exhaust pipe and then discharged from the right end when the gas is discharged from the exhaust pipe, harmful components in the gas are absorbed by the activated carbon filter screen and the HEPA filter screen, the health of nearby workers is ensured, and the HEPA filter screen and the activated carbon filter screen in the exhaust pipe can be regularly replaced by disassembling the first and second rectangular frames, so that the filtering effect of harmful gas is ensured.

[0018] Further, when the two third motors at the rear side of the feeding box are started, the output shafts of the third motors rotate to drive the two rotating shafts at the front ends to relatively rotate, so that the two crushing rollers relatively rotate, and when the plastic particle raw materials are put into the feeding box, the plastic particle raw materials slide from the upper side of the inclined plate to the space between the two crushing rollers, are extruded and crushed into smaller particles by the relatively rotating crushing rollers, and are discharged to the lower part of the inner side of the feeding box and are heated and melted, so that the melting efficiency of the raw materials is higher by crushing the large particle raw materials into small particle plastic raw materials. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the extrusion cylinder of the utility model;

[0021] Figure 3 It is the structure schematic view at the position of the heating plate of the utility model;

[0022] Figure 4 It is the structure schematic view at the rear end of the feeding box of the utility model;

[0023] Figure 5 It is the internal structure schematic view of the feeding box of the utility model;

[0024] Figure 6 It is the internal structure schematic view of the exhaust pipe of the utility model;

[0025] Figure 7 It is the structure sectional view at the exhaust pipe of the utility model;

[0026] Figure 8 It is the structure schematic view at the second motor of the utility model.

[0027] In the drawing: 1, base; 2, support plate; 3, extrusion cylinder; 401, speed reducer; 402, first motor; 403, auger blade; 501, feeding hopper; 502, feeding box; 503, box cover; 504, handle; 505, fixed frame; 506, heating rod; 507, fixed plate; 508, second motor; 509, shroud; 510, stirring shaft; 511, exhaust pipe; 512, first rectangular frame; 513, HEPA filter screen; 514, second rectangular frame; 515, activated carbon filter screen; 516, threaded rod; 517, rotating handle; 518, air inlet pipe; 519, fan; 520, closure; 601, inclined plate; 602, third motor; 603, rotating shaft; 604, crushing roller. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Please refer to Figures 1-8 The utility model provides technical scheme: New single screw extruder for plastic processing, including base 1 and support plate 2, support plate 2 is fixedly connected with the upside left and right ends of base 1, the upper end of support plate 2 is fixedly connected with extrusion cylinder 3, and the inside and outside two ends of extrusion cylinder 3 are provided with extrusion mechanism, the upper end of extrusion cylinder 3 is provided with feeding mechanism, and the inside of feeding mechanism is provided with crushing mechanism.

[0030] The extrusion mechanism comprises a speed reducer 401 mounted on the left side of the extrusion cylinder 3, a first motor 402 mounted on the left end of the speed reducer 401, and an auger blade 403 mounted on the right end of the speed reducer 401. The outer side of the auger blade 403 is rotatably connected to the inner side of the extrusion cylinder 3. A valve is arranged at the lower end of the interior of the feeding hopper 501. When the first motor 402 is started, the output shaft rotates and drives the auger blade 403 on the inner side of the extrusion cylinder 3 to rotate, so as to transport the liquid plastic raw material in the extrusion cylinder 3 to the right to the extrusion head.

[0031] The feeding mechanism comprises a feeding hopper 501 fixedly connected to the left side of the upper end of the extrusion cylinder 3. The upper end of the feeding hopper 501 is fixedly connected with a feeding box 502. The upper end of the feeding box 502 is hingedly connected with a box cover 503. The upper side of the front end of the box cover 503 is fixedly connected with a handle 504. The outer side of the lower end of the feeding box 502 is fixedly connected with a fixed frame 505. The inner side of the fixed frame 505 is fixedly connected with a heating rod 506. The inner side of the feeding box 502 is fixedly connected with a fixed plate 507 at the middle position. The upper side of the middle position of the fixed plate 507 is mounted with a second motor 508. The upper side of the fixed plate 507 is fixedly connected with a protective cover 509 at the outer end of the second motor 508. The lower end of the output shaft of the second motor 508 is fixedly connected with a stirring shaft 510. During the melting process of the plastic particles in the feeding hopper 501, the second motor 508 is started, the output shaft rotates and drives the stirring shaft 510 to rotate, so as to stir the plastic particles in the feeding box 502, so that the particle raw materials in the feeding box 502 are evenly heated, thereby improving the melting efficiency of the particle raw materials.

[0032] The right end of the feeding box 502 is fixedly connected with an exhaust pipe 511, the inner right end of the exhaust pipe 511 is connected with a first rectangular frame 512, the inner side of the first rectangular frame 512 is fixedly connected with a HEPA filter screen 513, the inner left end of the exhaust pipe 511 is connected with a second rectangular frame 514, the inner side of the second rectangular frame 514 is fixedly connected with an activated carbon filter screen 515, the inner front end of the exhaust pipe 511 is connected with a threaded rod 516, the upper and lower ends of the right side of the inner part of the exhaust pipe 511 are provided with a first through slot, the upper and lower ends of the left side of the inner part of the exhaust pipe 511 are provided with a second through slot, the outer sides of the upper and lower ends of the first rectangular frame 512 are slidably connected with the inner sides of the first through slot, the outer sides of the upper and lower ends of the second rectangular frame 514 are slidably connected with the inner sides of the second through slot, threaded grooves are formed in the inner front ends of the first rectangular frame 512 and the second rectangular frame 514, a circular hole is formed in the middle position of the front of the first through slot and the second through slot in the inner part of the exhaust pipe 511, the outer side of the rear end of the threaded rod 516 is threadedly connected with the inner side of the threaded groove, so that after the first rectangular frame 512 is slid into the first through slot or the second rectangular frame 514 is slid into the second through slot, the threaded rod 516 is then threaded into the threaded groove through the circular hole, the first rectangular frame 512 is fixed in the first through slot or the second rectangular frame 514 is fixed in the second through slot, and the positions of the HEPA filter screen 513 and the activated carbon filter screen 515 are fixed in the inner part of the exhaust pipe 511, so that when the gas in the feeding box 502 is discharged through the exhaust pipe 511, it is filtered by the activated carbon filter screen 515 and the HEPA filter screen 513 in the exhaust pipe 511 and then discharged from the right end, and harmful components in the gas are absorbed by the activated carbon filter screen 515 and the HEPA filter screen 513, ensuring the health of nearby workers.

[0033] The inner sides of the first through slot and the second through slot formed in the inner part of the exhaust pipe 511 are fixedly connected with rubber pads, so that when the first rectangular frame 512 is fixed in the first through slot and the second rectangular frame 514 is fixed in the second through slot, the outer sides of the upper and lower ends of the first rectangular frame 512 and the second rectangular frame 514 contact the rubber pads in the first through slot or the second through slot, so that the first through slot and the second through slot can be tightly closed after the first rectangular frame 512 and the second rectangular frame 514 are installed, preventing the gas from leaking directly from the gaps of the first through slot and the second through slot without being filtered by the activated carbon filter screen 515 and the HEPA filter screen 513.

[0034] The inner left end of the air inlet pipe 518 is provided with a fan 519, and the left side of the air inlet pipe 518 is hingedly provided with a cover 520. The front end of the threaded rod 516 is welded with a rotating handle 517, the left end of the feeding box 502 is fixedly connected with the air inlet pipe 518, the lower side of the box cover 503 abuts against the upper side of the feeding box 502, and the right side of the cover 520 abuts against the left side of the air inlet pipe 518, so that the box cover 503 is covered to the upper side of the feeding box 502 without external force, the upper end of the feeding box 502 is closed, and the feeding box 502 is rotated to be vertically downward due to gravity and located at the left side of the air inlet pipe 518, so that the left end of the air inlet pipe 518 is closed, and the gas generated in the feeding box 502 is discharged from the air outlet pipe 511.

[0035] Therefore, after the extrusion work is completed, the cover 520 is opened, the fan 519 is started again, so that the external air enters the feeding box 502 from the air inlet pipe 518, and the gas in the feeding box 502 is discharged from the air outlet pipe 511, and the discharged gas is filtered and purified by the HEPA filter screen 513 and the activated carbon filter screen 515, so that after the gas in the feeding box 502 is completely purified, it can be ensured that there is no harmful gas in the device after the work is completed, and harm is avoided when the box cover 503 is opened next time.

[0036] The crushing mechanism comprises an inclined plate 601 fixedly connected to the upper side of the inner side of the feeding box 502, third motors 602 installed at the left and right ends of the rear side of the feeding box 502, rotating shafts 603 fixedly connected to the front ends of the output shafts of the third motors 602, and crushing rollers 604 fixedly connected to the outer sides of the rotating shafts 603.

[0037] The inclined plate 601 is symmetrically and obliquely fixed to the left and right ends of the inner side of the feeding box 502 above the crushing rollers 604, and the oblique direction is higher near the left and right ends of the feeding box 502 and lower near the middle of the feeding box 502 (that is, the oblique direction of the inclined plate 601 is higher near the left and right ends of the feeding box 502 than near the middle of the feeding box 502), so that after the two third motors 602 at the rear side of the feeding box 502 are started, the output shafts of the third motors 602 rotate to relatively rotate the two rotating shafts 603 at the front ends, so that when the two crushing rollers 604 relatively rotate, after the plastic particle raw materials are put into the feeding box 502, the plastic particle raw materials slide from the upper side of the inclined plate 601 to between the two crushing rollers 604 and are crushed into smaller particles by the relatively rotating crushing rollers 604 and then discharged to the inside below of the feeding box 502 to be heated and melted, and the crushing of the large particle raw materials into smaller particles can make the melting efficiency of the raw materials faster.

[0038] Working principle: when the plastic processing, first close the valve inside the hopper 501, then open the third motor 602, then open the box cover 503 to guide the plastic particles into the feed box 502, the raw material is sliding to the broken roll 604 between the relative rotation by the inclined plate 601, is extruded into small plastic particles by broken roll 604 between the falling to the feed box 502 inside, then open the second motor 508 and heating rod 506, the plastic particles in the feed box 502 heating at the same time, the plastic particles are stirred, harmful gas generated in the process of plastic particles melting from the exhaust pipe 511, and through the exhaust pipe 511 inside is filtered by activated carbon filter screen 515 and HEPA filter screen 513 purification, until the plastic particles in the feed box 502 completely melted, open the valve below the hopper 501, the liquid plastic raw material flows into the extrusion cylinder 3, at the same time, start the first motor 402, its output shaft rotates through the reducer 401 transmission, drive the auger blade 403 inside the extrusion cylinder 3 rotation, the liquid plastic raw material into the extrusion cylinder 3 inside is transported to the right to the extrusion head for extrusion production.

[0039] It should be noted that in this document, the terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a means" does not exclude the existence of additional identical elements in the process, method, article, or apparatus including the element.

Claims

1. A novel single-screw extruder for plastic processing, comprising a base (1) and a support plate (2), the support plate (2) being fixedly connected to the upper left and right ends of the base (1), characterized in that: The upper end of the support plate (2) is fixedly connected with an extrusion cylinder (3), the inner and outer ends of the extrusion cylinder (3) are provided with an extrusion mechanism, the upper end of the extrusion cylinder (3) is provided with a feeding mechanism, the inside of the feeding mechanism is provided with a crushing mechanism; The feeding mechanism comprises a feeding hopper (501) fixedly connected to the left side of the upper end of the extrusion cylinder (3), the upper end of the feeding hopper (501) is fixedly connected with a feeding box (502), the upper end of the feeding box (502) is hingedly connected with a box cover (503), the upper side of the front end of the box cover (503) is fixedly connected with a handle (504), the outer side of the lower end of the feeding box (502) is fixedly connected with a fixed frame (505), the inner side of the fixed frame (505) is fixedly connected with a heating rod (506), the inner side of the feeding box (502) is fixedly connected with a fixed plate (507) at the middle position, the upper side of the fixed plate (507) is installed with a second motor (508) at the middle position, the upper side of the fixed plate (507) is fixedly connected with a protective cover (509) at the outer end of the second motor (508), the output shaft of the second motor (508) is fixedly connected with a stirring shaft (510) at the lower end, the right end of the feeding box (502) is fixedly connected with an exhaust pipe (511), the inside of the right end of the exhaust pipe (511) is connected with a first rectangular frame (512), the inner side of the first rectangular frame (512) is fixedly connected with a HEPA filter screen (513), the inside of the left end of the exhaust pipe (511) is connected with a second rectangular frame (514), the inner side of the second rectangular frame (514) is fixedly connected with an activated carbon filter screen (515), the inside of the front end of the exhaust pipe (511) is connected with a threaded rod (516), the front end of the threaded rod (516) is welded with a rotating handle (517), the left end of the feeding box (502) is fixedly connected with an air inlet pipe (518), the inner side of the left end of the air inlet pipe (518) is installed with a fan (519), the left side of the air inlet pipe (518) is hingedly connected with a cover (520).

2. The new single screw extruder for plastic processing according to claim 1, characterized in that: The extrusion mechanism comprises a speed reducer (401) installed on the left side of the extrusion cylinder (3), the left end of the speed reducer (401) is installed with a first motor (402), the right end of the speed reducer (401) is installed with an auger blade (403), the outer side of the auger blade (403) is rotatably connected with the inner side of the extrusion cylinder (3), the inside of the lower end of the feeding hopper (501) is provided with a valve.

3. The new single screw extruder for plastic processing according to claim 1, characterized in that: The upper and lower ends of the right side of the exhaust pipe (511) are provided with first through grooves, the upper and lower ends of the left side of the exhaust pipe (511) are provided with second through grooves, the outer sides of the upper and lower ends of the first rectangular frame (512) are in sliding connection with the inner sides of the first through grooves, the outer sides of the upper and lower ends of the second rectangular frame (514) are in sliding connection with the inner sides of the second through grooves, the inner sides of the front ends of the first rectangular frame (512) and the second rectangular frame (514) are provided with threaded grooves, the middle position of the front side of the exhaust pipe (511) is provided with a circular hole, the outer side of the threaded rod (516) is in sliding connection with the inner side of the circular hole, and the rear end of the threaded rod (516) is in threaded connection with the inner side of the threaded groove.

4. The new single screw extruder for plastic processing according to claim 1, characterized in that: The upper side of the feeding box (502) is in abutment with the lower side of the box cover (503), and the left side of the sealing cover (520) is in abutment with the right side of the air inlet pipe (518).

5. The new single screw extruder for plastic processing according to claim 1, characterized in that: The inner sides of the first through grooves and the second through grooves provided in the exhaust pipe (511) are fixedly connected with rubber pads.

6. The new single screw extruder for plastic processing according to claim 1, characterized in that: The crushing mechanism comprises an inclined plate (601) fixedly connected to the upper side of the inner side of the feeding box (502), third motors (602) installed on the left and right ends of the rear side of the feeding box (502), rotating shafts (603) fixedly connected to the front ends of the output shafts of the third motors (602), and crushing rollers (604) fixedly connected to the outer sides of the rotating shafts (603).

7. The new single screw extruder for plastic processing according to claim 6, characterized in that: The inclined plate (601) is symmetrically and obliquely fixed to the left and right ends of the inner side of the feeding box (502) above the crushing rollers (604), and the oblique direction is higher near the left and right ends of the feeding box (502) and lower near the middle of the feeding box (502).

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