CN212194108U

CN212194108U - Single screw extruder

Info

Publication number: CN212194108U
Application number: CN202021068185.7U
Authority: CN
Inventors: 童哲王
Original assignee: Ningbo Haihang Plastic Machinery Manufacturing Co ltd
Current assignee: Ningbo Haihang Plastic Machinery Manufacturing Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2020-12-22
Anticipated expiration: 2030-06-11

Abstract

The utility model provides a single screw extruder, which relates to the field of extruders and comprises a frame, a driving device arranged on the frame, an extruding device connected with the driving device and a feeding device, wherein the extruding device comprises a machine barrel and a rotatable screw, the feeding device is arranged at one end of the machine barrel close to the driving device, and an infrared heating device is arranged on the machine barrel; the driving device comprises a pre-molding seat connected with the machine barrel and a coupling connected with the screw rod, and the pre-molding seat is provided with an adjusting mechanism; when the machine works, a material is fed into the machine barrel by the feeding device, the machine barrel is heated by the infrared heating device to melt the material, and the material is extruded and formed by the screw driven by the driving device; the utility model provides a pair of single screw extruder, through drive arrangement, adjustable bracket and infrared heating device's cooperation, not only easy to assemble can the accurate control extrusion capacity moreover, and it is wide to be suitable for the product scope, and processing effect is good, and production efficiency is high, and is energy-concerving and environment-protective moreover.

Description

Single screw extruder

Technical Field

The utility model relates to an extruder field especially relates to a single screw extruder.

Background

Single screw extruders are used in the plastics processing industry as a common extrusion device. The single screw extruder is mainly used for extruding soft and hard polyvinyl chloride, polyethylene and other thermoplastic plastics, can be used for processing various plastic products, such as blown film, extruded tube, press plate, wire drawing belt and the like, and can also be used for melt granulation. The single screw extruder has advanced extruder design, high quality, high plasticizing performance, low power consumption, involute gear transmission, low noise, stable operation, great bearing capacity, long service life and other features.

The driving device and the machine barrel bracket are important parts in the single-screw extruder; the existing driving device generally comprises a common motor and a reduction gearbox, and the structure is complex, the size is large, the reduction gearbox is easy to damage, and the service life is influenced; the common alternating current motor is difficult to realize stepless speed change, and cannot meet the molding requirements of extrusion molding plastic products with complex section shapes and high process requirements; and after multi-stage transmission, the transmission efficiency is low and the energy consumption is high. Secondly, because the existing cylinder bracket structure is fixed and cannot be adjusted, the installation of the cylinder is very inconvenient; and because the extruder type becomes bigger, the barrel bracket is bigger and bigger, and the accumulated error of the rack machining and the barrel machining is bigger and bigger, the sizes of the barrel and the rack in the left-right direction after being installed are difficult to be correctly adjusted, so that the phenomenon of unilateral friction between the barrel and the screw is caused, and the normal operation of the extruder is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims to solve the problem that a single screw extruder is provided to overcome current single screw extruder can not realize accurate control, the transmission inefficiency of extrusion capacity and the bracket can not adjust the defect that leads to installing the barrel difficulty.

(II) technical scheme

In order to solve the technical problem, the utility model provides a single screw extruder, which comprises a frame, a driving device arranged on the frame, an extruding device connected with the driving device and a feeding device, wherein the extruding device comprises a machine barrel and a rotatable screw, the feeding device is arranged at one end of the machine barrel close to the driving device, and an infrared heating device is arranged on the machine barrel; the driving device comprises a pre-molding seat connected with the machine barrel and a coupling connected with the screw rod, and an adjusting mechanism is mounted on the pre-molding seat and used for enabling the driving device to transmit more accurately; when the device works, the feeding device sends materials into the machine barrel, the infrared heating device heats the machine barrel to melt the materials, and the screw is driven by the driving device to extrude and form the materials. Through drive arrangement, adjustable bracket and infrared heating device's cooperation, not only easy to assemble can accurate control extrusion capacity moreover, and applicable product range is wide, and the processing is effectual, and production efficiency is high, moreover energy-concerving and environment-protective.

Further, the coupling is rotatably installed in the premolded base, and one end of the coupling is connected with the first belt pulley; the pre-plastic seat is provided with a servo motor, the servo motor is connected with a second belt wheel, and the first belt wheel is connected with the second belt wheel through a synchronous belt; the adjusting mechanism is used for adjusting the tightness of the synchronous belt. The adjusting mechanism comprises an adjusting plate which is slidably arranged on the pre-molding seat, and the servo motor is fixed on the adjusting plate; the adjusting plate is provided with a plurality of waist-shaped grooves, and the pre-molding seat is provided with a plurality of guide pillars matched with the waist-shaped grooves; threaded connection has the catch bar on the regulating plate, the tip of catch bar passes the regulating plate supports and leans on mould the seat in advance. The driving device is matched with the pre-molding seat, the coupling, the first belt wheel, the second belt wheel and the servo motor, so that the driving device is simple in overall structure, small in size, few in transmission parts, high in transmission efficiency and convenient to install and maintain; the adoption of the servo motor can realize stepless speed change, can accurately control the extrusion capacity, and is suitable for various plastic products; and set up adjustment mechanism, can adjust the elasticity of hold-in range, the transmission is more accurate.

Furthermore, the premolding base is symmetrically provided with convex parts, an accommodating groove with an opening is defined between the two convex parts, and the servo motor is arranged in the accommodating groove; the one end symmetry of regulating plate is fixed with the curb plate, the catch bar with curb plate threaded connection, the tip of catch bar runs through behind the curb plate support by the side of bellying. The coupling is sequentially sleeved with a first bearing, a second bearing, a bearing retainer ring and a third bearing, one end of the pre-molded seat is fixedly provided with a bearing gland, and the bearing gland enables the second bearing, the bearing retainer ring and the third bearing to be sequentially abutted and locked; and the coupling is provided with a limit nut which is abutted against the third bearing.

Further, an adjustable bracket for supporting the machine barrel is arranged on the machine frame; the adjustable bracket comprises a clamping sleeve and a supporting frame, the clamping sleeve is sleeved on the machine barrel, and a plurality of telescopic rods for fixing the machine barrel are annularly and equidistantly arranged on the outer circumferential surface of the clamping sleeve; the support frame through turn up the mechanism with the frame is connected, the upper portion of support frame with the centre gripping cover looks butt, be provided with the holding surface on the outer periphery of centre gripping cover, the upper end of support frame be provided with holding surface complex supporting part. Heightening mechanism includes heightening pole and fastening screw that the symmetry set up, heightening pole threaded connection be in on the support frame, heightening pole's one end runs through the support frame and support and lean on the up end of frame, fastening screw's one end run through heightening pole and with frame threaded connection. This bracket with adjustable pass through the cooperation of centre gripping cover and support frame and the cooperation of heightening pole and telescopic link, can eliminate the influence because of machining error brings, and it is more convenient to make the installation.

Further, loading attachment includes the feed bin of infundibulate, be provided with the feed inlet on the barrel, the feed bin with the feed inlet is connected, slidable mounting has the control panel that is used for adjusting unloading speed on the feed inlet. The infrared heating device comprises an infrared heating ring, and the infrared heating ring is sleeved on the outer side of the machine barrel and can heat the machine barrel. This infrared heating device adopts the infrared ray to heat, and infrared heating circle self becomes the far infrared radiation heat source, also leads to the temperature gradient increase in addition because of its surface temperature's improvement, makes the heat energy conduction intensity of the heated object strengthen, and the heat-absorbing capacity improves greatly, and heating efficiency is higher, and the heating effect is better.

(III) advantageous effects

The utility model provides a pair of single screw extruder compares with prior art and has following advantage:

1) the driving device is matched with the pre-molding seat, the coupling, the first belt wheel, the second belt wheel and the servo motor, so that the driving device is simple in overall structure, small in size, few in transmission parts, high in transmission efficiency and convenient to install and maintain; the adoption of the servo motor can realize stepless speed change, can accurately control the extrusion capacity, and is suitable for various plastic products; the adjusting mechanism is arranged, so that the tightness of the synchronous belt can be adjusted, and the transmission is more accurate;

2) the adjustable bracket can eliminate the influence caused by machining errors through the matching of the clamping sleeve and the supporting frame and the matching of the height adjusting rod and the telescopic rod, so that the installation is more convenient; during installation, the clamping sleeve is sleeved on the machine barrel, the telescopic rod is screwed to lock the machine barrel, and the height adjusting rod is rotated to enable the supporting part to abut against the supporting surface, so that the whole operation is simple, and the installation can be easily carried out even if the machining error is large;

3) this infrared heating device adopts the infrared ray to heat, and infrared heating circle self becomes the far infrared radiation heat source, also leads to the temperature gradient increase in addition because of its surface temperature's improvement, makes the heat energy conduction intensity of the heated object strengthen, and the heat-absorbing capacity improves greatly, and heating efficiency is higher, and the heating effect is better.

Drawings

FIG. 1 is a perspective view of a single screw extruder according to the present invention;

FIG. 2 is a perspective view of the single screw extruder with the driving device removed;

FIG. 3 is a perspective view of a single screw extruder driving device according to the present invention;

fig. 4 is a perspective view of the single screw extruder driving device of the present invention after the servo motor is removed;

FIG. 5 is a schematic structural view of the connection between the premolded base and the coupling of the driving device of the single screw extruder according to the present invention;

FIG. 6 is a perspective view of an adjusting plate of a driving device of a single screw extruder according to the present invention;

FIG. 7 is a perspective view of an adjustable bracket of a single screw extruder according to the present invention;

FIG. 8 is a schematic structural view of an adjustable bracket of a single screw extruder according to the present invention;

the corresponding part names for the various reference numbers in the figures are: 1. a frame; 2. a drive device; 5. an extrusion device; 6. a feeding device; 7. an infrared heating device; 8. an adjustable bracket; 21. pre-molding a base; 22. a coupling; 23. a first pulley; 24. a servo motor; 25. a second pulley; 26. a synchronous belt; 27. an adjusting plate; 28. a guide post; 29. a push rod; 30. a side plate; 32. a first bearing; 33. a second bearing; 34. a bearing retainer ring; 35. a third bearing; 36. a bearing gland; 37. a limit nut; 38. a base plate; 39. oil sealing; 40. an oil seal retainer ring; 41. a pulley retainer ring; 42. locking the nut; 51. a barrel; 52. a screw; 61. a storage bin; 62. a control panel; 71. an infrared heating ring; 81. a clamping sleeve; 82. a support frame; 83. a telescopic rod; 84. a height adjusting rod; 85. fastening screws; 211. a boss portion; 212. a containing groove; 271. a waist-shaped groove; 811. a support surface; 821. a support portion.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 8, the utility model provides a single screw extruder, including frame 1, install drive arrangement 2 in frame 1, extrusion device 5 and loading attachment 6 be connected with drive arrangement 2, extrusion device 5 includes barrel 51 and the rotatable screw rod 52 of installing in barrel 51, and barrel 51 and drive arrangement 2 mould seat 21 fixed connection in advance, and screw rod 52 is connected with drive arrangement 2's coupling 22. The feeding device 6 is installed at one end of the cylinder 51 close to the driving device 2, and the infrared heating device 7 is installed on the cylinder 51.

Referring to fig. 3 to 6, the driving device 2 includes a pre-molded base 21 fixed on the frame 1 and a coupling 22 rotatably installed in the pre-molded base 21, one end of the coupling 22 is connected to the first pulley 23, and the other end of the coupling 22 is connected to the screw 52. The coupling 22 is sequentially sleeved with a first bearing 32, a second bearing 33, a bearing retainer ring 34 and a third bearing 35, one end of the premolded base 21 is fixedly provided with a bearing gland 36, and the bearing gland 36 enables the second bearing 33, the bearing retainer ring 34 and the third bearing 35 to be sequentially abutted and locked; the coupling 22 is provided with a limit nut 37, and the limit nut 37 is abutted against the third bearing 35 and used for locking the limit coupling 22. One end of the pre-molding base 21 is fixedly connected with the machine barrel 51; an oil seal 39 and an oil seal retainer ring 40 are sequentially arranged between the premold 21 and the coupling 22 on one side of the cylinder 51 to prevent lubricating oil from entering the cylinder and the screw. The coupling 22 is sequentially provided with a belt wheel retainer ring 41, a first belt wheel 23 and a locking nut 42, the first belt wheel 23 is in key connection with the coupling 22, and the locking nut 42 enables the belt wheel retainer ring 41 and the first belt wheel 23 to be abutted and locked.

Referring to fig. 2, 3 and 6, the premold base 21 is provided with the servo motor 24, the premold base 21 is symmetrically provided with the convex portions 211, the two convex portions 211 enclose the containing groove 212 with an opening, and the servo motor 24 is disposed in the containing groove 212. The servo motor 24 is connected with the second belt wheel 25, and the first belt wheel 23 is connected with the second belt wheel 25 through a synchronous belt 26 with arc teeth; the preplasticizing seat 21 is provided with an adjusting mechanism for adjusting the tightness of the synchronous belt 26. The adjusting mechanism comprises an adjusting plate 27 which is slidably arranged on the pre-molding base 21, and the servo motor 24 is fixed on the adjusting plate 27; a plurality of waist-shaped grooves 271 are arranged on the adjusting plate 27, and a plurality of guide posts 28 matched with the waist-shaped grooves 271 are arranged on the pre-molding base 21; the adjusting plate 27 is connected with a pushing rod 29 in a threaded manner, and the end of the pushing rod 29 passes through the adjusting plate 27 and abuts against the premold seat 21. A side plate 30 is symmetrically fixed at one end of the adjusting plate 27, a push rod 29 is in threaded connection with a nut on the side plate 30, and the end of the push rod 29 penetrates through the side plate 30 and abuts against the side end of the protruding portion 211.

When the driving device works, the screwing push rod pushes the adjusting plate to adjust the tightness of the synchronous belt, the servo motor drives the coupling to rotate through the second belt wheel, the synchronous belt and the first belt wheel, and the coupling drives the screw to rotate. This drive arrangement replaces the drive mode of traditional motor and gear box through the cooperation of moulding seat, shaft coupling, first band pulley, second band pulley and servo motor in advance, has the advantage that can accurate control extrusion capacity, and applicable product range is wide, and transmission efficiency is high, energy-concerving and environment-protective.

Referring to fig. 1, 7 and 8, the carriage 1 is provided with an adjustable carriage 8 for supporting the barrel 51; the adjustable bracket 8 comprises a separated clamping sleeve 81 and a supporting frame 82, the clamping sleeve 81 is sleeved outside the machine barrel 51, a plurality of telescopic rods 83 for fixing the machine barrel 51 are annularly arranged on the outer circumferential surface of the clamping sleeve 81 at equal intervals, the telescopic rods 83 can slide along the radial direction of the clamping sleeve 81, and one end of each telescopic rod 83 penetrates through the clamping sleeve 81 and abuts against the outer circumferential surface of the machine barrel 51. The supporting frame 82 is connected with the frame 1 through an elevation mechanism, the supporting frame 82 can slide in the vertical direction, the upper portion of the supporting frame 82 is abutted to the clamping sleeve 81, a supporting surface 811 is arranged on the outer circumferential surface of the clamping sleeve 81, a supporting portion 821 matched with the supporting surface 811 is arranged at the upper end of the supporting frame 82, and the supporting portion 821 comprises symmetrically arranged bulges. Through the cooperation of supporting part and holding surface, the supporting part includes the arch of symmetry, and the supporting area is big, and the support frame home range that the centre gripping cover can be relative is big, and the flexibility is high. The heightening mechanism comprises heightening rods 84 and fastening screws 85 which are symmetrically arranged, the heightening rods 84 are in threaded connection with the supporting frame 82, one ends of the heightening rods 84 penetrate through the supporting frame 82 and abut against the upper end face of the machine frame 1, and one ends of the fastening screws 85 penetrate through the heightening rods 84 and are in threaded connection with the machine frame 1. In this embodiment, the extension rod 83 and the height-adjusting rod 84 are both screws.

When the machine barrel is installed, the clamping sleeve is sleeved on the machine barrel, the telescopic rod is screwed to enable one end of the telescopic rod to slide along the radial direction of the clamping sleeve and abut against the outer circumferential surface of the machine barrel, and then the machine barrel and the clamping sleeve are locked; then, the two height-adjusting rods are simultaneously screwed to enable the support frame to slide in the vertical direction, and further enable the supporting portion of the support frame to abut against the supporting surface of the clamping sleeve, so that installation is completed. This bracket with adjustable, through the cooperation of centre gripping cover and support frame and the cooperation of heightening pole and telescopic link, can eliminate the influence because of machining error brings, make the installation more convenient.

Referring to fig. 2, the feeding device 6 includes a funnel-shaped bin 61, a feeding port is disposed on the barrel 51, the bin 61 is connected to the feeding port, and a control board 62 for adjusting the blanking speed is slidably mounted on the feeding port, so that the blanking speed is conveniently controlled. The infrared heating device 7 comprises an infrared heating ring 71, and the infrared heating ring 71 is sleeved outside the cylinder 51 and can heat the cylinder 51. The existing heating device mainly comprises a temperature controller and a heating ring, and has the disadvantages of large heat loss, high energy consumption, short service life and large maintenance amount; this infrared heating device replaces traditional heating methods, adopts the infrared ray to heat, and heating efficiency is high, and heating effect is good, life cycle is long.

During operation, the bin 61 of the feeding device 6 feeds the material into the machine barrel 51, the infrared heating ring 71 of the infrared heating device 7 heats the machine barrel 51 to melt the material, and the servo motor 24 of the driving device 2 drives the coupling 22 to drive the screw 52 to extrude and form the material.

According to the single-screw extruder provided by the embodiment, the driving device, the adjustable bracket and the infrared heating device are matched, so that the single-screw extruder is convenient to install, can accurately control the extrusion amount, is wide in applicable product range, good in processing effect and high in production efficiency, and is energy-saving and environment-friendly; the driving device has the advantages of simple integral structure, small volume, fewer transmission parts, high transmission efficiency and convenient installation and maintenance; the adoption of the servo motor can realize stepless speed change, can accurately control the extrusion capacity, and is suitable for various plastic products; the tightness of the synchronous belt can be adjusted through the adjusting mechanism, so that the transmission is more accurate; the adjustable bracket can eliminate the influence caused by machining errors through the matching of the clamping sleeve and the supporting frame and the matching of the height adjusting rod and the telescopic rod, so that the installation is more convenient; during installation, the clamping sleeve is sleeved on the machine barrel, the telescopic rod is screwed to lock the machine barrel, and the height adjusting rod is rotated to enable the supporting part to abut against the supporting surface, so that the whole operation is simple, and the installation can be easily carried out even if the machining error is large; this infrared heating device adopts the infrared ray to heat, and heating efficiency is higher, and the heating effect is better.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A single screw extruder which is characterized in that: the device comprises a rack (1), a driving device (2) arranged on the rack (1), an extruding device (5) connected with the driving device (2) and a feeding device (6), wherein the extruding device (5) comprises a machine barrel (51) and a rotatable screw (52), the feeding device (6) is arranged at one end, close to the driving device (2), of the machine barrel (51), and an infrared heating device (7) is arranged on the machine barrel (51); the driving device (2) comprises a pre-molding base (21) connected with the machine barrel (51) and a coupling (22) connected with the screw rod (52), and an adjusting mechanism is installed on the pre-molding base (21).

2. The single screw extruder of claim 1, wherein: the coupling (22) is rotatably arranged in the premolded base (21), and one end of the coupling (22) is connected with the first belt pulley (23); install servo motor (24) on moulding seat (21) in advance, servo motor (24) are connected with second band pulley (25), first band pulley (23) with second band pulley (25) are connected through hold-in range (26), adjustment mechanism is used for adjusting the elasticity of hold-in range (26).

3. The single screw extruder of claim 2, wherein: the adjusting mechanism comprises an adjusting plate (27) which is slidably mounted on the pre-molding seat (21), and the servo motor (24) is fixed on the adjusting plate (27); a plurality of waist-shaped grooves (271) are formed in the adjusting plate (27), and a plurality of guide columns (28) matched with the waist-shaped grooves (271) are arranged on the pre-molding base (21); threaded connection has catch bar (29) on regulating plate (27), the tip of catch bar (29) passes regulating plate (27) and supports and leans on in advance moulding seat (21).

4. The single screw extruder of claim 3, wherein: the pre-molding seat (21) is symmetrically provided with convex parts (211), a containing groove (212) with an opening is defined between the two convex parts (211), and the servo motor (24) is arranged in the containing groove (212); one end symmetry of regulating plate (27) is fixed with curb plate (30), catch bar (29) with curb plate (30) threaded connection, the tip of catch bar (29) runs through support behind curb plate (30) and leans on the side of bellying (211).

5. The single screw extruder of claim 2, wherein: a first bearing (32), a second bearing (33), a bearing retainer ring (34) and a third bearing (35) are sequentially sleeved on the coupling (22), a bearing gland (36) is fixed at one end of the premolded base (21), and the bearing gland (36) enables the second bearing (33), the bearing retainer ring (34) and the third bearing (35) to be sequentially abutted and locked; and a limiting nut (37) is mounted on the coupling (22), and the limiting nut (37) abuts against the third bearing (35).

6. The single screw extruder of claim 1, wherein: an adjustable bracket (8) used for supporting the machine barrel (51) is arranged on the machine frame (1).

7. The single screw extruder of claim 6, wherein: the adjustable bracket (8) comprises a clamping sleeve (81) and a supporting frame (82), the clamping sleeve (81) is sleeved on the machine barrel (51), and a plurality of telescopic rods (83) used for fixing the machine barrel (51) are annularly and equidistantly arranged on the outer circumferential surface of the clamping sleeve (81); the supporting frame (82) is connected with the rack (1) through a height adjusting mechanism, the upper portion of the supporting frame (82) is abutted to the clamping sleeve (81), a supporting surface (811) is arranged on the outer circumferential surface of the clamping sleeve (81), and a supporting portion (821) matched with the supporting surface (811) is arranged at the upper end of the supporting frame (82).

8. The single screw extruder of claim 7, wherein: heightening mechanism includes heightening pole (84) and fastening screw (85) that the symmetry set up, heightening pole (84) threaded connection on support frame (82), heightening pole (84)'s one end run through support frame (82) and support and lean on the up end of frame (1), fastening screw (85)'s one end run through heightening pole (84) and with frame (1) threaded connection.

9. The single screw extruder of claim 1, wherein: loading attachment (6) include feed bin (61) of infundibulate, be provided with the feed inlet on barrel (51), feed bin (61) with the feed inlet is connected, slidable mounting has control panel (62) that are used for adjusting unloading speed on the feed inlet.

10. The single screw extruder of claim 1, wherein: the infrared heating device (7) comprises an infrared heating ring (71), and the infrared heating ring (71) is sleeved on the outer side of the machine barrel (51) and can heat the machine barrel (51).