CN113085150A

CN113085150A - Production process and device for high-strength bent plastic arc-shaped strip

Info

Publication number: CN113085150A
Application number: CN202110367819.1A
Authority: CN
Inventors: 陆洪建
Original assignee: Hangzhou Huaqiang Industrial Co ltd
Current assignee: Hangzhou Huaqiang Industrial Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-07-09
Anticipated expiration: 2041-04-06
Also published as: CN113085150B

Abstract

The application relates to a production device of a high-strength bent plastic arc-shaped strip, which comprises a plastic extruder, a cooling tank and a bending mechanism, wherein the bending mechanism comprises a sliding plate, a plurality of bending assemblies horizontally connected to the sliding plate in a sliding manner along the direction parallel to the discharging direction of the plastic extruder, a driving disc for driving the plurality of bending assemblies to be arranged in a certain radian, a driving assembly for driving the driving disc to rotate, a resetting piece for driving the bending assemblies to slide towards the driving disc direction, and an ejection assembly for driving the bending assemblies to be away from the driving disc; the driving disc is provided with a plurality of stages of adjusting arc plates with different diameters in sequence along the circumferential direction of the driving disc, and the peripheral wall of each adjusting arc plate is a cambered surface with a circle center concentric with the driving disc. Through the setting of driving-disc and a plurality of grades of regulation arc boards of arranging along its circumference, rotate through the driving-disc, make a plurality of changeable butt of subassembly of bending in the regulation arc board of different diameters to adjust the radian that the groove of bending of a plurality of subassemblies of bending links into the pitch arc, realize the fast switch and adjust.

Description

Production process and device for high-strength bent plastic arc-shaped strip

Technical Field

The application relates to the field of arc-shaped plastic strip processing, in particular to a production process and a device for high-strength bent plastic arc-shaped strips.

Background

The plastic strip is often installed in all kinds of equipment as the equipment part, and often needs the plastic strip of different shapes to come the different positions of adaptation, and wherein arc plastic strip is common shape, need be after the plastic strip is extruded, buckle into required radian through the device with the plastic strip.

In the related technology of plastic arc strip production, for example, the patent with publication number CN107139498A discloses a molding device and a molding process for arc plastic section, which includes a machine head, the machine head is installed on an extruder, a shaping mold is installed on the machine head, a guiding arc mold is arranged at the outlet end of the shaping mold at intervals, the guiding arc mold includes an arc bottom plate and guiding arc mold plates respectively arranged at two sides of the arc bottom plate, and two side faces of a molded part extruded from the shaping mold are respectively tangent to the inner walls of the corresponding guiding arc mold plates. The molding process comprises the following steps: 1) heating the plastic raw material by an extruder to form a plastic melt; 2) extruding the plastic melt into a machine head; 3) the plastic melt flows out of the machine head to obtain a primary formed part; 4) extruding the primary formed part into a shaping mould arranged on a machine head; 5) the primary forming part flows out of the shaping die to obtain a secondary forming part; 6) extruding the secondary forming part into a guide arc-shaped die arranged at the outlet end of the sizing die at intervals; 7) and (4) forcing the secondary forming part to pass through the guide arc die to obtain the arc plastic profile. Is suitable for the production of arc plastic profiles.

Aiming at the related technologies, the inventor thinks that the arc guide die can only bend the plastic strip into a fixed radian, and cannot adapt to the processing requirements of plastic strips with various radians, and the arc guide die needs to be detached and replaced with the arc guide die with the corresponding radian, which is troublesome.

Disclosure of Invention

In order to the radian of multiple different plastic strip of quick adaptation, the application provides a production device of crooked plastic arc strip of high strength adopts following technical scheme:

a production device for high-strength bent plastic arc-shaped strips comprises a plastic extruder, a cooling pool and a bending mechanism, wherein the bending mechanism comprises a sliding plate, a plurality of bending components horizontally connected to the sliding plate in a sliding manner along the direction parallel to the discharging direction of the plastic extruder, a driving disc for driving the bending components to be arranged in a certain radian, a driving component for driving the driving disc to rotate, a resetting component for driving the bending components to slide towards the driving disc, and an ejection component for driving the bending components to be away from the driving disc; the driving disc is fixedly provided with a rotating shaft in a penetrating manner along the axial direction, the lower end of the rotating shaft is rotatably connected with an installation seat, the installation seat is connected with the sliding plate, the driving disc is sequentially provided with a plurality of stages of adjusting arc plates with different diameters along the circumferential direction, and the peripheral wall of each adjusting arc plate is a cambered surface with the center of a circle concentric with the driving disc; the bending assembly comprises a sliding seat, a rotating seat and a bending piece, wherein the sliding seat is connected with the sliding seat in a sliding mode, the bending piece is installed on the rotating seat in a rotating mode, the rotating seat is abutted to the cambered surface of the adjusting arc plate, and a bending groove is formed in the bending piece in the direction tangent to the adjusting arc plate.

Through adopting above-mentioned technical scheme, when producing the arc plastic strip, at first extrude into the straight plastic strip of specific shape with the plastics of melting form through the plastic extruder, the preforming after the cooling bath cooling, straight plastic strip is in proper order through each bending groove that the subassembly was seted up of bending, a plurality of bending assembly butt is in the different positions of driving-disc circumference regulation arc board, the pitch arc that the bending groove multiple spot that makes a plurality of subassemblies of bending set up formed is the radian that the plastic strip needs to buckle promptly, thereby make the plastic strip after a plurality of subassemblies of bending, be buckled into required radian promptly. Through the setting of driving-disc and a plurality of grades of regulation arc boards of arranging along its circumference, rotate through the driving-disc, make a plurality of changeable butt of subassembly of bending in the regulation arc board of different diameters to adjust the radian that the groove of bending of a plurality of subassemblies of bending links into the pitch arc, realize the fast switch and adjust.

Preferably, the driving assembly comprises a first bevel gear sleeved on the rotating shaft, a second bevel gear meshed with the first bevel gear, a driving shaft for driving the second bevel gear to rotate and a driving part, and the diameter of the second bevel gear is smaller than that of the first bevel gear.

Through adopting above-mentioned technical scheme, rotate through the first bevel gear of the less second bevel gear drive of diameter to the drive pivot drives the driving-disc and rotates, and is comparatively laborsaving during the drive, and is convenient for control pivot rotation accuracy.

Preferably, the driving shaft is sleeved with a translation gear, the sliding plate is provided with a translation rack along the direction parallel to the discharging direction of the plastic extruder, and the translation gear is meshed with the translation rack.

Through adopting above-mentioned technical scheme, through the setting of translation gear and translation rack, when drive assembly drive-disc rotated, the translation gear followed the drive shaft and rotated to through the meshing relation with the translation rack, order about the mount pad and slided along the slide, make bending mechanism department when the angle of buckling to the plastic strip is too big, through the mount pad, the whole of drive-disc and the subassembly of bending slides, adjust the angle of buckling after the plastic strip comes out from the cooling tank, prevent that plastic strip stress from too concentrating and leading to the fracture.

Preferably, the ejection assembly comprises an auxiliary disc coaxially fixed on the rotating shaft, an ejection piece abutted to the peripheral wall of the auxiliary disc and an ejection plate arranged on one side of the ejection piece, the ejection plate faces the bending assembly, the auxiliary disc is sequentially provided with a reset section and an ejection section in a staggered mode along the circumferential direction of the auxiliary disc, the distance between the ejection section and the axis of the rotating shaft is greater than the distance between the reset section and the axis of the rotating shaft, a first elastic piece used for driving the ejection piece to move towards the direction of the auxiliary disc is arranged between the ejection plate and the auxiliary disc, and the ejection plate can be abutted to all the bending assemblies simultaneously.

Through adopting above-mentioned technical scheme, through the setting of ejecting subassembly, when the pivot orders about the driving-disc and rotates the switching and adjust the arc board, ejecting piece butt in ejecting interval to towards keeping away from the slip of auxiliary disk direction, through ejecting board with all assemblies of bending push away from the driving-disc, make things convenient for the driving-disc to rotate the switching.

Preferably, the bending mechanism further comprises a locking assembly, the locking assembly comprises a locking block, a fixing block and a abutting spring, the fixing block is connected to the mounting seat, and two ends of the abutting spring are respectively connected to the fixing block and the locking block and drive the locking block to abut against the peripheral wall of the auxiliary disc.

Through adopting above-mentioned technical scheme, through the setting of locking subassembly, accomplish the switching back when the driving-disc, the locking piece inlays in the interval that resets, prevents auxiliary disc and pivot from rotating by oneself, keeps the stability of driving-disc.

Preferably, the two side walls of the bending groove are respectively and rotatably connected with a bending wheel, and a gap for the plastic strip to pass through is formed between the two bending wheels.

Through adopting above-mentioned technical scheme, through the setting of the wheel of bending, reduced the plastics strip through when the piece of bending, and the piece of bending between the friction.

Preferably, the bending mechanism further comprises a base arranged at the bottom of the sliding plate and an adjusting component arranged in the base, and the sliding plate is connected to the base in a sliding mode and positioned through the adjusting component along the direction parallel to the discharging direction of the plastic extruder.

Through adopting above-mentioned technical scheme, through adjusting part, can be according to actual need, carry out the whole regulation to all parts on slide and the slide to adapt to the plastic strip of different tensile.

Preferably, the cooling bath exit is equipped with the subassembly of bending in advance, and the subassembly of bending in advance includes fixed connection in the fixing base of cooling bath, rotates to be connected in the seat of buckling of fixing base and the relative fixing base pivoted second elastic component of drive bending seat, and the seat of buckling is offered and is used for supplying the logical groove that the plastic strip passes through, leads to the groove and is the contained angle setting with plastics extruder ejection of compact direction.

Through adopting above-mentioned technical scheme, through the setting of the subassembly of bending in advance, make the plastic strip come out the back from the cooling bath, bend by the subassembly of bending in advance, directly be certain angle and move towards the mechanism direction of bending, and be buckled into a less angle in advance, reduce the range that the mechanism of bending once buckled to the plastic strip, improved the effect of buckling and the product quality of plastic strip.

Preferably, the adjusting arc plate is detachably connected to the driving plate.

Through adopting above-mentioned technical scheme, can be according to the required radian of reality, the installation corresponds the regulation arc board of diameter, and conveniently adjusts the installation and the change of arc board.

In order to adapt to the radians of a plurality of different plastic strips fast, the application further provides a production process of the high-strength bent plastic arc-shaped strip, which adopts the following technical scheme:

the method comprises the following steps: s1, extrusion molding, namely extruding the molten plastic into plastic strips with corresponding shapes through an extruder die; s2, cooling, namely soaking the plastic strips in cooling water in a cooling pool; and S3, bending, and bending the flat plastic strip into a certain radian through a bending mechanism after the flat plastic strip is led out from the cooling pool.

By adopting the technical scheme, the plastic strip is rapidly cooled and preformed through the cooling pool after being extruded and molded, the geometrical shape and the internal structure of the plastic strip during extrusion are kept, and then the plastic strip is bent into the required radian through the bending mechanism, so that the processing quality and the processing efficiency of the arc-shaped plastic strip are improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the radian of the bent plastic strip is rapidly switched and adjusted by arranging the driving disc and the plurality of stages of adjusting arc plates arranged along the circumferential direction of the driving disc;

2. through the arrangement of the ejection assembly, the rotation switching of the driving disc is facilitated;

3. through the arrangement of the locking assembly, the stability of the driving disc is kept;

4. through the setting of the pre-bending assembly, the bending amplitude of the plastic strip by the bending mechanism is reduced, and the bending effect and the product quality of the plastic strip are improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a cross-sectional structural schematic view of a pre-bend assembly of an embodiment of the present application;

FIG. 3 is a cross-sectional structural schematic view of a drive disc and drive assembly of an embodiment of the present application;

FIG. 4 is a cross-sectional structural schematic view of a bending assembly of an embodiment of the present application;

fig. 5 is a schematic structural diagram of an ejection assembly and a locking assembly according to an embodiment of the present application.

Description of reference numerals: 1. a plastic extruder; 2. a cooling pool; 3. a pre-bend assembly; 31. a fixed seat; 32. a bending seat; 321. a through groove; 322. rotating the rod; 323. a rotating groove; 33. a torsion spring; 4. a bending mechanism; 41. a base; 411. an adjustment groove; 42. a slide plate; 421. a chute; 422. a limiting groove; 43. an adjustment assembly; 431. a lead screw; 432. an adjusting block; 433. a hand wheel; 44. bending the assembly; 441. a sliding seat; 442. a rotating seat; 443. bending a piece; 444. bending the groove; 445. bending wheels; 446. extruding a groove; 447. a slider; 45. a drive disc; 451. a rotating shaft; 46. a mounting seat; 461. a limiting block; 47. adjusting the arc plate; 48. a drive assembly; 481. a first bevel gear; 482. a second bevel gear; 483. a drive shaft; 484. a drive member; 485. a translation gear; 486. a translation rack; 49. a reset member; 50. ejecting the assembly; 501. an auxiliary disc; 5011. a tray body; 5012. a semi-circular member; 502. ejecting the part; 503. ejecting the plate; 504. a first elastic member; 51. a locking assembly; 511. a locking block; 512. a fixed block; 513. the spring is tightly propped; 514. a guide groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses production device of high-strength bent plastic arc-shaped strip. Referring to fig. 1, the production device comprises a plastic extruder 1, a cooling pool 2, a pre-bending assembly 3 and a bending mechanism 4 which are arranged in sequence. The cooling pool 2 is connected with the outlet of the plastic extruder 1, the pre-bending component 3 is arranged at the outlet of the cooling pool 2, and the cooling pool 2 and the pre-bending component 3 are arranged in sequence along the extrusion direction of the plastic extruder 1. The bending mechanism 4 is positioned on one side of the pre-bending assembly 3.

In the production process of the arc-shaped plastic strip, firstly, the straight plastic strip is extruded through the plastic extruder 1, and is rapidly cooled through soaking of cooling water in the cooling pool 2 in the conveying process, after the straight plastic strip is led out from the cooling pool 2, the straight plastic strip is pre-bent through the pre-bending component 3, so that the straight plastic strip is conveyed towards the direction of the bending mechanism 4 in an inclined manner, and the arc-shaped plastic strip with the required radian is bent through the bending mechanism 4.

The plastic extruder 1 and the cooling tank 2 are prior art and will not be described in detail herein. The plastic extruder 1 is mainly used for extruding plastic strips with specified shapes from molten plastics through the die head of the plastic extruder 1, and the cooling pool 2 is mainly used for rapidly cooling the just extruded plastic strips through cooling water heat exchange, so that the plastic strips keep the geometrical shapes and the internal structures when being extruded, and are prevented from deforming under the action of self gravity.

Referring to fig. 2, the pre-bending assembly 3 includes a fixing base 31 fixedly connected to an end of the cooling pool 2 away from the plastic extruder 1, a bending base 32 rotatably connected to the fixing base 31, and a second elastic member for driving the bending base 32 to rotate relative to the fixing base 31.

The bending seat 32 is provided with a through groove 321 for the plastic strip to pass through, and two side walls of the through groove 321 are abutted against two sides of the plastic strip.

Bending seat 32 lower extreme fixedly connected with dwang 322, fixing base 31 have seted up rotation groove 323 towards bending seat 32 one end along vertical direction correspondence, and dwang 322 is located rotation groove 323 and rotates and connect in rotation groove 323. The second elastic member is a torsion spring 33, the torsion spring 33 is sleeved outside the rotating rod 322, and two ends of the torsion spring 33 are respectively and fixedly connected to the bottom of the rotating groove 323 and the bending seat 32. When the torsion spring 33 is in an unstressed state, the through groove 321 is perpendicular to the discharging direction of the plastic extruder 1.

Referring to fig. 1, the bending mechanism 4 includes a base 41, a sliding plate 42 slidably connected to the base 41 along a direction parallel to the extrusion direction of the plastic extruder 1, an adjusting assembly 43 for driving the sliding plate 42 to slide relative to the base 41, a plurality of bending assemblies 44 horizontally slidably connected to the sliding plate 42 along a direction parallel to the discharge direction of the plastic extruder 1, a driving disc 45 for driving the plurality of bending assemblies 44 to be arranged in a certain arc, a mounting seat 46 for mounting the driving disc 45, an adjusting arc plate 47 mounted on the circumference of the driving disc 45, a driving assembly 48 for driving the driving disc 45 to rotate, a resetting member 49 for driving the bending assemblies 44 to slide towards the driving disc 45, an ejecting assembly 50 for driving the bending assemblies 44 to be away from the driving disc 45, and a locking assembly 51 for preventing the driving disc.

Referring to fig. 1 and 3, the base 41 is provided with an adjusting groove 411 along the extrusion direction of the plastic extruder 1, the adjusting assembly 43 includes a screw 431 located in the adjusting groove 411 and rotatably connected to the base 41 through a bearing, an adjusting block 432 threadedly connected to the screw 431, and a hand wheel 433 fixedly connected to one end of the screw 431, and the adjusting block 432 is fixedly connected to the bottom of the sliding plate 42.

Referring to fig. 1, a plurality of bending assemblies 44 are provided, and in the present embodiment, three bending assemblies 44 are taken as an example. The bending unit 44 includes a sliding base 441 slidably coupled to the sliding plate 42, a rotating base 442 rotatably coupled to the sliding base 441, and a bending member 443 attached to the rotating base 442.

Referring to fig. 1 and 4, the sliding plate 42 is provided with a plurality of parallel sliding grooves 421 arranged at intervals along the extrusion direction of the plastic extruder 1, and each bending assembly 44 corresponds to one sliding groove 421. The vertical section of spout 421 is the type of falling T, and sliding seat 441 lower extreme corresponds fixedly connected with slider 447 of the type of falling T, and slider 447 is located spout 421 and along spout 421 length direction sliding connection in spout 421. The reset piece 49 is a reset spring, two ends of the reset spring are respectively and fixedly connected to one side of the slider away from the driving disk 45 and the side wall of the chute 421, and the reset spring is used for driving the slider to always keep the trend of moving towards the driving disk 45.

The connection and cooperation between the rotating seat 442 and the sliding seat 441 are the same as those of the fixed seat 31 and the bending seat 32 of the pre-bending assembly 3, and a rotating rod 322 and a torsion spring 33 are also provided for driving the rotating seat 442 to maintain a tendency to rotate perpendicular to the extrusion direction of the plastic extruder 1. The rotating seat 442 is an arc surface having the same radian as the driving disc 45 and is abutted to the arc surface of the adjusting arc plate 47.

The bending member 443 is fixedly connected to one side of the rotating seat 442 away from the driving disk 45, a bending groove 444 is horizontally formed in the bending member 443, and the bending groove 444 is perpendicular to the extrusion direction of the plastic extruder 1.

Two side walls of the bending groove 444 are respectively and rotatably connected with a bending wheel 445 with a vertical axis through a bearing, each bending wheel 445 is provided with an extrusion groove 446 along the circumferential direction, the two extrusion grooves 446 are communicated, and a gap for a plastic strip to pass through is formed between the two bending wheels 445.

Referring to fig. 3, the mounting seat 46 is shaped like a v-21274with a downward opening, the sliding plate 42 is positioned on the mounting seat 46 v-21274, the positions on the two sides of the v-shaped opening are provided with limiting grooves 422 with dovetail-shaped cross sections, the mounting seat 46 v-21274, the two sides of the v-shaped opening are fixedly provided with limiting blocks 461, the limiting blocks 461 are positioned in the limiting grooves 422 and are connected in the limiting grooves 422 in a sliding manner along the extrusion direction of the plastic extruder 1, so that the mounting seat 46 can only slide along the length direction of the limiting grooves 422.

The different regulation arc boards 47 of a plurality of grades of diameters are installed along driving-disc 45 circumference in proper order, and the cambered surface of a plurality of regulation arc boards 47 periphery walls all is the same with driving-disc 45 concentric and central angle, in this embodiment, use four central angles to be 90 regulation arc boards 47 as an example. Each of the adjusting arc plates 47 is detachably mounted to the peripheral wall of the driving disk 45 by bolts.

The lower end of the driving disk 45 is fixedly connected with a rotating shaft 451 along the axial direction thereof, and the rotating shaft 451 is inserted into the mounting seat 46 and is rotatably connected to the mounting seat 46 through a bearing. The driving assembly 48 includes a first bevel gear 481 fixedly secured to the rotating shaft 451, a second bevel gear 482 meshed with the first bevel gear 481, a driving shaft 483 for driving the second bevel gear 482 to rotate, and a driving member 484.

A first bevel gear 481 is engaged with an upper side of a second bevel gear 482, and the second bevel gear 482 is smaller in diameter than the first bevel gear 481. The driving shaft 483 is fixedly inserted through the second bevel gear 482 and is rotatably coupled to the mounting base 46 via a bearing. The driving member 484 is a servo motor, the body of the servo motor is fixedly mounted on one side of the mounting seat 46, and the output end of the servo motor is fixedly connected to the driving shaft 483.

The outer fixed cover of drive shaft 483 is equipped with translation gear 485, slide 42 upper end wall is located the fixed translation rack 486 that is equipped with in translation gear 485 below, translation rack 486 extends along being on a parallel with 1 ejection of compact direction of plastic extruder, translation gear 485 meshes in translation rack 486, rotate as servo motor drive-disc 45, switch and rotate the seat 442 butt when adjusting arc plate 47, translation gear 485 drive mount pad 46 is along spacing groove 422 length direction translation slip, in order to adapt to the radian of plastic strip, prevent that 3 punishment of preflex book from leading to the plastic strip fracture to the pressure of plastic strip too big.

Referring to fig. 5, the ejector unit 50 includes an auxiliary plate 501 coaxially fixed to the rotation shaft 451, an ejector 502 abutting on a peripheral wall of the auxiliary plate 501, and an ejector plate 503 provided on the ejector 502 facing the bending unit 44.

The auxiliary disc 501 is located below the driving disc 45, the auxiliary disc 501 comprises a disc body 5011 and a plurality of semicircular pieces 5012, the number of the semicircular pieces 5012 is equal to the number of the adjusting arc plates 47, the semicircular pieces 5012 are arrayed at equal intervals in the circumferential direction of the disc body 5011, and in the embodiment, four auxiliary discs are correspondingly arranged according to the number of the adjusting arc plates 47.

Through the arrangement of the four semicircular pieces 5012, the auxiliary disc 501 sequentially forms four groups of reset intervals and four groups of ejection intervals along the circumferential direction of the auxiliary disc, the circumferential wall of each semicircular piece 5012 is the ejection interval, and the interval part between every two adjacent semicircular pieces 5012 is the reset interval. Because the protruding semicircular piece 5012 is arranged, the distance between the ejecting section and the axis of the rotating shaft 451 is larger than the distance between the resetting section and the axis of the rotating shaft 451, when the auxiliary disc 501 rotates, the semicircular piece 5012 can push the ejecting piece 502 and the ejecting plate 503 to move in the direction away from the auxiliary disc 501.

The ejector 502 and the ejector plate 503 are fixedly connected and linked through connecting rods, and the number of the connecting rods is adjusted adaptively according to the required connection strength. The ejecting plate 503 extends along the arrangement direction of the plurality of bending assemblies 44 and can simultaneously abut against the fixing seats 31 of all the bending assemblies 44.

A first elastic member 504 for driving the ejector member 502 to move toward the auxiliary tray 501 and to abut against the peripheral wall of the auxiliary tray 501 is disposed between the ejector plate 503 and the auxiliary tray 501, the first elastic member 504 is a tension spring, and two ends of the tension spring are respectively fixedly connected to the mounting seat 46 and the ejector plate 503. The extension springs are provided with two and symmetrically arranged at two ends of the ejector plate 503, so that the moving stability of the ejector plate 503 is improved.

Referring to fig. 3 and 5, the locking assembly 51 includes a locking block 511, a fixing block 512, and a biasing spring 513.

The fixing block 512 is fixedly connected to the mounting base 46, a guide groove 514 is formed in the fixing block 512 along the radial direction of the disc 5011, and the locking block 511 is partially located in the guide groove 514 and is slidably connected to the guide groove 514 along the length direction of the guide groove 514. The abutting spring 513 is a compression spring and is located in the guide groove 514, and two ends of the abutting spring are respectively connected to the bottom of the guide groove 514 and one end of the locking block 511, which is far away from the auxiliary disc 501, and drives the locking block 511 to always keep abutting against the peripheral wall of the auxiliary disc 501.

The embodiment of the application also discloses a production process of the high-strength bent plastic arc-shaped strip.

The method comprises the following steps:

s1: extruding and molding, namely extruding the molten plastic into plastic strips with corresponding shapes through an extruder die;

s2: cooling, namely soaking the plastic strips in cooling water in a cooling pool 2;

s3: bending, after the straight plastic strip is led out from the cooling pool 2, guiding is carried out through the pre-bending assembly 3, the plastic strip moves towards the bending mechanism 4 at a certain angle, and the plastic strip is bent into a certain radian through the bending mechanism 4.

The implementation principle of the embodiment of the application is as follows:

when the arc-shaped plastic strip is produced, firstly, the straight plastic strip is extruded through the plastic extruder 1, the plastic strip passes through the cooling pool 2 and is preformed through soaking of cooling water in the cooling pool 2, after the plastic strip is led out from the cooling pool 2, the through groove 321 formed in the bending seat 32 in the pre-bending component 3 passes through, the bending seat 32 compresses the torsion spring 33 through the tension of the plastic strip, the bending seat 32 rotates relative to the fixed seat 31, and the torsion spring 33 releases elasticity to enable the plastic strip to bend towards the direction of the bending mechanism 4.

When the plastic strip passes through the bending mechanism 4, the plastic strip sequentially passes through the extrusion groove 446 formed between the two bending wheels 445 in each bending part 443, the bending parts 443 abut against the adjusting arc plates 47 on the driving disc 45, so that the extrusion grooves 446 of the bending parts 443 form corresponding radians, and the plastic strip is extruded and bent to form the required radian.

Through the arrangement of the driving disc 45 and the driving assembly 48, the servo motor drives the driving disc 45 to rotate through the transmission of the driving shaft 483, the first bevel gear 481 and the second bevel gear 482 and switches to the required adjusting arc plate 47, during the switching of the adjusting arc plate 47, all the bending assemblies 44 are pushed to be away from the driving disc 45 through the auxiliary disc 501 and the ejection assembly 50 until the driving disc 45 completes the switching action, the reset piece 49 drives all the bending assemblies 44 to be abutted against the corresponding adjusting arc plates 47 again, and therefore the rapid switching of the radian formed by the bending grooves 444 of the plurality of bending assemblies 44 is completed. After the adjustment of the arc plate 47 is completed, the locking block 511 is driven by the resisting spring 513 to be embedded in the reset region of the auxiliary plate 501, so as to prevent the rotation shaft 451 from rotating by itself.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a production device of crooked plastics arc strip of high strength, includes plastic extruder (1), cooling bath (2) and bending mechanism (4), its characterized in that: the bending mechanism (4) comprises a sliding plate (42), a plurality of bending assemblies (44) horizontally connected to the sliding plate (42) in a sliding manner along the discharging direction parallel to the plastic extruder (1), a driving disc (45) for driving the bending assemblies (44) to be arranged in a certain radian, a driving assembly (48) for driving the driving disc (45) to rotate, a resetting piece (49) for driving the bending assemblies (44) to slide towards the driving disc (45) and an ejecting assembly (50) for driving the bending assemblies (44) to be far away from the driving disc (45); the driving disc (45) is fixedly provided with a rotating shaft (451) in a penetrating manner along the axial direction, the lower end of the rotating shaft (451) is rotatably connected with an installation seat (46), the installation seat (46) is connected with the sliding plate (42), the driving disc (45) is sequentially provided with a plurality of stages of adjusting arc plates (47) with different diameters along the circumferential direction, and the outer circumferential wall of each adjusting arc plate (47) is a cambered surface with the center of circle concentric with the driving disc (45); the bending assembly (44) comprises a sliding seat (441) connected with the sliding plate (42) in a sliding mode, a rotating seat (442) connected with the sliding seat (441) in a rotating mode and a bending piece (443) installed on the rotating seat (442), the rotating seat (442) abuts against the cambered surface of the adjusting arc plate (47), and a bending groove (444) is formed in the bending piece (443) in the direction tangent to the adjusting arc plate (47).

2. The apparatus for producing curved strips of high-strength curved plastic according to claim 1, wherein: the driving assembly (48) comprises a first bevel gear (481) sleeved on the rotating shaft (451), a second bevel gear (482) meshed with the first bevel gear (481), a driving shaft (483) used for driving the second bevel gear (482) to rotate and a driving piece (484), wherein the diameter of the second bevel gear (482) is smaller than that of the first bevel gear (481).

3. The apparatus for producing curved strips of high-strength curved plastic as claimed in claim 2, wherein: the driving shaft (483) is sleeved with a translation gear (485), the sliding plate (42) is provided with a translation rack (486) along the direction parallel to the discharging direction of the plastic extruder (1), and the translation gear (485) is meshed with the translation rack (486).

4. The apparatus for producing curved strips of high-strength curved plastic according to claim 1, wherein: the ejection assembly (50) comprises an auxiliary disc (501) coaxially fixed on the rotating shaft (451), ejection pieces (502) abutted to the peripheral wall of the auxiliary disc (501) and an ejection plate (503) arranged on one side, facing the bending assembly (44), of the ejection pieces (502), the auxiliary disc (501) is sequentially provided with a reset section and an ejection section in a staggered mode along the circumferential direction of the auxiliary disc, the distance between the ejection section and the axis of the rotating shaft (451) is larger than the distance between the reset section and the axis of the rotating shaft (451), a first elastic piece (504) used for driving the ejection pieces (502) to move towards the direction of the auxiliary disc (501) is arranged between the ejection plate (503) and the auxiliary disc (501), and the ejection plate (503) can be abutted to all the bending assemblies (44) simultaneously.

5. The apparatus for producing curved strips of high-strength curved plastic as claimed in claim 4, wherein: the bending mechanism (4) further comprises a locking assembly (51), the locking assembly (51) comprises a locking block (511), a fixing block (512) and a resisting spring (513), the fixing block (512) is connected to the mounting seat (46), and two ends of the resisting spring (513) are respectively connected to the fixing block (512) and the locking block (511) and drive the locking block (511) to be tightly contacted with the peripheral wall of the auxiliary disc (501).

6. The apparatus for producing curved strips of high-strength curved plastic according to claim 1, wherein: two side walls of the bending groove (444) are respectively connected with a bending wheel (445) in a rotating mode, and a gap for the plastic strip to pass through is formed between the two bending wheels (445).

7. The apparatus for producing curved strips of high-strength curved plastic according to claim 1, wherein: the bending mechanism (4) further comprises a base (41) arranged at the bottom of the sliding plate (42) and an adjusting component (43) arranged in the base (41), and the sliding plate (42) is connected to the base (41) in a sliding mode and positioned through the adjusting component (43) along the direction parallel to the discharging direction of the plastic extruder (1).

8. The apparatus for producing curved strips of high-strength curved plastic according to claim 1, wherein: the utility model discloses a plastic strip cooling device, including cooling tank (2), cooling tank (2) exit is equipped with pre-bending assembly (3), pre-bending assembly (3) including fixed connection in fixing base (31) of cooling tank (2), rotate and connect in the seat of buckling (32) of fixing base (31) and drive seat of buckling (32) relative fixing base (31) pivoted second elastic component, seat of buckling (32) is offered and is used for supplying logical groove (321) that the plastic strip passes through, lead to groove (321) and plastic extruder (1) ejection of compact direction and be the contained angle setting.

9. The apparatus for producing curved strips of high-strength curved plastic according to claim 1, wherein: the adjusting arc plate (47) is detachably connected with the driving disc (45).

10. A process for producing a curved strip of high-strength curved plastic material using the production apparatus as claimed in any one of claims 1 to 9, comprising the steps of: s1, extrusion molding, namely extruding the molten plastic into plastic strips with corresponding shapes through an extruder die;

s2, cooling, namely soaking the plastic strips in cooling water in a cooling pool (2);

and S3, bending, and bending the plastic strip into a certain radian through a bending mechanism (4) after the straight plastic strip is led out from the cooling pool (2).