A kind of rotary ripple disable net-changing device
Technical field
The invention belongs to net-changing device field, refer in particular to a kind of novel rotary ripple disable net-changing device.
Background technology
In the process of plastic extrusion, plastic melt, through plastifying for a long time and being heated, will produce decomposition debris getting in melt, add the impurity in raw material, they, once enter in extruder head, will cause flow blockage, there is defect in plastic products, and even can not normally produce; In order to filtering foreign material, make pure melt enter extrusion molding machine head smoothly and usually screen pack will be set between screw head and extrusion molding machine head, be used for stoping impurity and foreign matter to enter among former; Along with the continuity found time, the foreign material on screen pack build up and cause head pressure to raise flow decline, and when exceeding certain pressure, namely screen pack is broken up, and filter screen lost efficacy, and now just must shut down replacing screen pack; From form removal head, clean, renew filter screen, again heat up, draw blank and extrude to normal production, this operation overall process dozens of minutes at least, several hours at most, causes raw material loss, energy waste, production cost to increase.
Market also occurs some are without the need to shutting down the net-changing device of draping; but it can cause comparatively strong fluctuation in draping process; due to the unexpected change of impulsive force; molten mass is made to become unstable; make discharging uneven; the problem such as easily broken, and easily produce unexpected dangerous, affect the net-changing device life-span.
Summary of the invention
The object of this invention is to provide a kind of structure simple, can not draping be shut down, filler exhaust in advance, ripple disable, the novel rotary ripple disable net-changing device that production efficiency is high.
The object of the present invention is achieved like this:
A kind of rotary ripple disable net-changing device, comprise net-changing device shell, filter cylinder, filter screen, central shaft, described net-changing device casing is outside filter cylinder, described filter cylinder is enclosed within outside central shaft, the outer wall of described net-changing device shell is provided with charging aperture c, the inwall of net-changing device shell forms blow tank, the groove face of blow tank forms discharging opening c, an end face relative with blow tank on described net-changing device shell forms and gets net groove;
Described filter cylinder forms the lautertuns of more than three, the outer surface of lautertuns is provided with screen pack, lautertuns forms several filter bores;
The outer surface of described central shaft forms feed well, and the position of feed well is corresponding with blow tank position, and the charging aperture d of described central shaft runner is arranged in the middle part of feed well, and the discharging opening d of central shaft is arranged in the middle part of the outer end of central shaft; Described net-changing device shell is also provided with the driving mechanism driving filter cylinder to rotate.
Flash groove is extended to side in the circumferential side of described blow tank; The outer surface of described central shaft also forms air discharge duct, air discharge duct be arranged on feed well circumferential side and with flash groove homonymy, the inside of described central shaft forms exhaust passage, the air inlet of exhaust passage is arranged on the middle part of air discharge duct, the gas outlet of exhaust passage is arranged on the side of air discharge duct, described filter cylinder forms the through hole a be connected with gas outlet, the equal correspondence of each lautertuns arranges a through hole a, described net-changing device shell forms the through hole b be connected with through hole a.
Described filter cylinder forms more than three identical lautertuns, the lautertuns of more than three is evenly distributed on filter cylinder surface and filter cylinder is all divided into the halves identical with lautertuns number, and the radian of described blow tank equals the radian of a halves or the radian of two halves.
The radian of described feed well equals the radian of blow tank.
Described air inlet is arranged on the center of air discharge duct, and air discharge duct is arranged to air inlet inclined depression.
One end radial direction of described central shaft extends flow distribution plate, net-changing device shell is fixedly connected with flow distribution plate, the outer end of described flow distribution plate is fixedly connected with feed opening flange, the outer end of described feed opening flange is provided with charging aperture a, the other end of described feed opening flange is provided with discharging opening a and is connected with the charging aperture b of flow distribution plate, the discharging opening b of flow distribution plate is connected with the charging aperture c of net-changing device shell, described flow distribution plate forms three runners, the charging aperture c of described net-changing device shell is also three and the discharging opening b one_to_one corresponding of three runners with flow distribution plate, the discharging opening c of described net-changing device shell is also three, all be arranged on the groove face of blow tank.
The both sides of described lautertuns form mounting groove, and described filter screen snaps in mounting groove.
Described driving mechanism comprises CD-ROM drive motor and gear end cap, described gear end cap is fixedly connected with net-changing device shell, described CD-ROM drive motor is fixedly connected with gear end cap, travelling gear, transition gear and working gear is provided with in described gear end cap, the output shaft of described CD-ROM drive motor is fixedly connected with travelling gear, one end of described filter cylinder is fixedly connected with working gear, and transition gear is arranged between travelling gear and working gear, and CD-ROM drive motor drives filter cylinder to rotate by gear drive.
Be provided with backing plate between described CD-ROM drive motor and gear end cap, the gear shaft of transition gear is fixedly connected with backing plate, is provided with copper sheathing between gear shaft and transition gear.
Described driving mechanism is arranged on the axis of filter cylinder, and described driving mechanism comprises CD-ROM drive motor, and output shaft and the filter cylinder of CD-ROM drive motor are coaxially arranged.
The present invention gives prominence to compared to existing technology and useful technique effect is:
1, the present invention is by filter cylinder forming multiple lautertuns, and an end face relative with blow tank on net-changing device shell forms gets net groove, thus makes it possible to carry out draping in non-stop-machine situation.
2, the present invention is by the design of overflow launder and blast pipe, make when filter cylinder forwards desired location to, by the lautertuns of work, preexhaust filler is carried out to the next one, when filter cylinder forwards the lautertuns that the next one will work to, can not lose suddenly due to pressure and produce fluctuation, thus make can continuous operation, and discharging is stablized, can not fracture; And because the runner of overflow launder is little, carry out in advance filler time, too many pressure can not be lost and cause produce fluctuation.
3, the present invention equals the radian of the radian of a halves or the radian of two halves by the radian of blow tank, the radian of described feed well equals the design of the radian of blow tank, thus the face making blow tank contact with lautertuns is identical all the time, even if make filter cylinder under the state of rotating, discharging is still stablized, can not fluctuation be produced, improve the quality of production and production efficiency.
4, the present invention equals the design of the radian of blow tank by the radian of feed well, the face that feed well is contacted with lautertuns is also identical all the time, even if make filter cylinder under the state of rotating, discharging is still stablized, can not fluctuation be produced, improve the quality of production and production efficiency.
5, the present invention is the design of three by runner, makes charging more steady.
6, the present invention is by the design of mounting groove, makes draping more convenient and quicker.
7, the present invention is by the design of backing plate, and the vibrations reducing motor are passed on net-changing device, make net-changing device work more stable.
8, between net-changing device shell of the present invention and filter cylinder, all there is not material stock gap in all the other places except blow tank and flash groove, between filter cylinder and central shaft, all there is not material stock gap in all the other places except feed well and air discharge duct, and because filter cylinder can rotate, so the molten mass on filter cylinder all can flow, there will not be the carbonization under long term high temperature of dead material, affect net-changing device service life.
Accompanying drawing explanation
Fig. 1 is one of structural representation of embodiment one net-changing device.
Fig. 2 is the structural representation two of embodiment one net-changing device.
Fig. 3 is one of exploded view of embodiment one net-changing device.
Fig. 4 is the exploded view two of embodiment one net-changing device.
Fig. 5 is the exploded view three of embodiment one net-changing device.
Fig. 6 is the cut-away view of embodiment one net-changing device.
Fig. 7 is one of structural representation of embodiment one net-changing device shell.
Fig. 8 is the structural representation two of embodiment one net-changing device shell.
Fig. 9 is the structural representation of embodiment one filter cylinder.
Figure 10 is one of structural representation of embodiment one central shaft.
Figure 11 is the structural representation two of embodiment one central shaft.
Figure 12 is the working state schematic representation of embodiment one predischarge.
Figure 13 is the A place enlarged drawing of Figure 12.
Figure 14 is the structural representation of embodiment one net-changing device shell and filter cylinder.
Figure 15 is the structural representation of embodiment two net-changing device.
Figure 16 is the cut-away view of embodiment two net-changing device.
1-net-changing device shell; 2-filter cylinder; 3-central shaft; 4-flow distribution plate; 5-feed opening flange; 6-charging aperture a; 61-discharging opening a; 7-charging aperture b; 8-discharging opening b; 9-charging aperture c; 10-blow tank; 11-discharging opening c; 12-gets net groove; 13-lautertuns; 14-filter bores; 15-feed well; 16-central shaft runner; 17-charging aperture d; 18-discharging opening d; The outer end of 19-central shaft; 20-flash groove; 21-air discharge duct; 22-exhaust passage; 23-air inlet; 24-gas outlet; 25-through hole a; 26-through hole b; 27-runner; 28-mounting groove; 29-servomotor; 30-gear end cap; 31-travelling gear; 32-transition gear; 33-working gear; 34-backing plate; 35-copper sheathing; 36-locking nut; 37-packing ring; 38-gear shaft; 39-coupling sleeve; 40-upper bed-plate; 41-lower bottom base; 42-flange.
Detailed description of the invention
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described:
Embodiment one: a kind of rotary ripple disable net-changing device, comprise net-changing device shell 1, filter cylinder 2, filter screen, central shaft 3, described net-changing device shell 1 is enclosed within outside filter cylinder 2, described filter cylinder 2 is enclosed within outside central shaft 3, the outer wall of described net-changing device shell 1 is provided with charging aperture c9, the inwall of net-changing device shell forms blow tank 10, the groove face of blow tank 10 forms discharging opening c11; Preferably, blow tank 10 of the present invention is arranged on the upper inwall of net-changing device shell, an end face relative with blow tank 10 on described net-changing device shell 1 forms and gets net groove 12; The lower surface of preferred net-changing device shell forms gets net groove 12;
Described filter cylinder 2 forms the lautertuns 13 of more than three, the outer surface of lautertuns 13 is provided with screen pack, lautertuns forms several filter bores 14;
The outer surface of described central shaft 3 forms feed well 15, and the position of feed well 15 is corresponding with blow tank 10 position, and the charging aperture d17 of described central shaft runner 16 is arranged in the middle part of feed well 15, and the discharging opening d18 of central shaft is arranged in the middle part of the outer end 19 of central shaft; Described net-changing device shell is also provided with the driving mechanism driving filter cylinder 2 to rotate.
Flash groove 20 is extended to side in the circumferential side of described blow tank, the outer surface of described central shaft also forms air discharge duct 21, air discharge duct 21 be arranged on feed well 15 circumferential side and with flash groove 20 homonymy, the inside of described central shaft forms exhaust passage 22, the air inlet 23 of exhaust passage 22 is arranged on the middle part of air discharge duct, the gas outlet 24 of exhaust passage is arranged on the side of air discharge duct 21, described filter cylinder 2 forms the through hole a25 be connected with gas outlet 24, each lautertuns 13 all correspondence arranges a through hole a25, described net-changing device shell 1 forms the through hole b26 be connected with through hole a25, when each lautertuns forwards pre-filler exhaust position to, a through hole a25 is had to be connected with gas outlet 24, through hole a25 is communicated with through hole b26.
Described filter cylinder 2 forms more than three identical lautertuns 13, the lautertuns 13 of more than three is evenly distributed on filter cylinder 2 surface and filter cylinder 2 is all divided into the halves identical with lautertuns 13 number, the radian of described blow tank 10 equals the radian of a halves or the radian of two halves, α in Figure 14 is the radian of a halves, and the radian of described feed well 15 equals the radian of blow tank 10.
The number of lautertuns can increase or reduce, but at least three, when lautertuns is three or four, the radian of blow tank equals the radian of a halves; When lautertuns is five, the radian of the radian of blow tank can be the radian of a halves also can be two halves; When lautertuns is six, the radian of blow tank can be the radian of a halves or the radian of two halves or the radian of three halves, by that analogy.
Described air inlet 23 is arranged on the center of air discharge duct 21, and air discharge duct 21 is arranged to air inlet inclined depression.
One end radial direction of described central shaft 3 extends flow distribution plate 4, net-changing device shell 1 is fixedly connected with flow distribution plate 4, the outer end of described flow distribution plate 4 is fixedly connected with feed opening flange 5, the outer end of described feed opening flange is provided with charging aperture a6, the other end of described feed opening flange 5 is provided with discharging opening a61 and is connected with the charging aperture b7 of flow distribution plate, the discharging opening b8 of flow distribution plate is connected with the charging aperture c9 of net-changing device shell, described flow distribution plate forms three runners 27, the charging aperture c9 of described net-changing device shell is also three and the discharging opening b8 one_to_one corresponding of three runners 27 with flow distribution plate, the discharging opening c11 of described net-changing device shell is also three, all be arranged on the groove face of blow tank 10.
The both sides of described lautertuns 13 form mounting groove 28, and described filter screen snaps in mounting groove 28.
Described driving mechanism comprises servomotor 29 and gear end cap 30, described gear end cap 30 is fixedly connected with net-changing device shell 1, described servomotor 29 is fixedly connected with gear end cap 30, travelling gear 31, transition gear 32 and working gear 33 is provided with in described gear end cap 30, the output shaft of described servomotor 29 is fixedly connected with travelling gear 31, one end of described filter cylinder 2 is fixedly connected with working gear 33, transition gear 32 is arranged between travelling gear 31 and working gear, and servomotor drives filter cylinder to rotate by gear drive.
Be provided with backing plate 34 between described servomotor 29 and gear end cap 30, the gear shaft of transition gear 32 is fixedly connected with backing plate, is provided with copper sheathing 35 between gear shaft 38 and transition gear.
The present invention is not limited only to servomotor, also can be stepper motor, hydraulic motor etc.
Operation principle of the present invention:
Normal operating conditions: molten mass enters from feed opening flange, shunted by the runner on flow distribution plate and enter net-changing device shell, flow out from the blow tank of net-changing device shell again, the screen pack of molten mass through filter cylinder flowed out from blow tank and lautertuns enter the feed well of central shaft, and enter from the charging aperture d feed well, flow out from the discharging opening d of central shaft, and enter next step extrusion molding machine head; Blow tank only to charging in a lautertuns, also can carry out charging to two lautertuns simultaneously.
Pre-filler exhaust condition: rotate filter cylinder, through hole a is alignd with the gas outlet of exhaust passage, and now molten mass is by the flash groove of blow tank side, enters in the lautertuns of pre-operation, air in the lautertuns of pre-operation, by exhaust passage, is being discharged by through hole a and through hole b; After reaching setting-up time, fill up molten mass in the lautertuns of pre-operation, driven by servomotor filter cylinder rotates, and is staggered in the gas outlet of through hole a and exhaust passage, can continue normal work afterwards; When the screen pack in previous lautertuns pushes away long-pending too much impurity, driven by servomotor filter cylinder rotates, the lautertuns filling in material is in advance made to carry out work, during turning, radian due to blow tank equals the radian of a halves, so the area of the contacted filter pocket of blow tank is identical all the time, thus in filter cylinder rotation process, can not produces molten mass and impact and appearance fluctuation.
In said process, the time that filter cylinder rotates can be set as required,
Can be: when the screen pack in the lautertuns of work at present pushes away long-pending too much impurity, driven by servomotor filter cylinder rotates, and forwards the position of pre-filler exhaust to, after pre-filler exhaust terminates, directly rotate filter cylinder, allow the lautertuns of pre-filler carry out work, the lautertuns of overheap impurity produces working position;
Also can be: the position first forwarding the exhaust of pre-filler to, angle is slightly rotated after pre-filler exhaust terminates, staggered in the gas outlet of through hole a and exhaust passage, then normally work, when screen pack in the lautertuns of work at present by the time pushes away long-pending too much impurity, driven by servomotor filter cylinder rotates, and allow the lautertuns of pre-filler carry out work, the lautertuns of overheap impurity produces working position.
Draping state: driven by servomotor filter cylinder rotates, and makes the filter screen groove piling up a large amount of impurity facing to getting net groove, thus take out screen pack and again change screen pack, when lautertuns is three, blow tank is simultaneously to two lautertuns chargings; When lautertuns is four, blow tank is only to a lautertuns charging.
Embodiment two: embodiment two is basically identical with the design of embodiment one, unlike, embodiment two does not have the design of flow distribution plate and feed opening flange, but directly charging interface is set in the upper end of net-changing device shell, and driving mechanism is arranged on the axis of filter cylinder, described driving mechanism comprises servomotor, servo motor output shaft and filter cylinder are coaxially arranged, the output shaft of servomotor connects a coupling sleeve 39, coupling sleeve 39 is fixedly connected with filter cylinder by screw, an end with discharging opening on central shaft is provided with locking nut 36, central axis is limited by locking nut, the other end of central shaft forms flange 42, flange 41 is against the end of filter cylinder, such design makes rotation more stable, structure is simpler.
The present invention has structure simple, can not shut down draping, filler exhaust in advance, ripple disable, the feature that production efficiency is high.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.