CN2333204Y

CN2333204Y - Carbon dioxide laser puncher

Info

Publication number: CN2333204Y
Application number: CN 98223816
Authority: CN
Inventors: 钱红斌; 胡文富; 何世新; 唐国根; 陈兰英; 吴怀英
Original assignee: Shanghai Institute of Optics and Fine Mechanics of CAS
Current assignee: Shanghai Institute of Optics and Fine Mechanics of CAS
Priority date: 1998-04-24
Filing date: 1998-04-24
Publication date: 1999-08-18
Anticipated expiration: 2008-04-24

Abstract

The utility model relates to a laser puncher for carbon dioxide, which is mainly used for punching a paper strip of a cigarette filter. The utility model comprises a laser, a modulating beam-splitting component and a punch component, wherein, the modulating beam-splitting component is formed by that a front-mounted focusing mirror rear-mounted focusing mirror have a common focusing O on the reflecting surface of a high-speed tilting mirror; the punch component is composed of a reflecting focusing component, wherein, the reflecting focusing component which is arranged on a tray is in the direction of a parallel light beam output by the modulating beam-splitting component. A punched paper strip is conveyed by a conveying mechanism for paper strips; a punch block which is provided with the punch component is arranged at the middle part of a middle roller of the conveying mechanism. The utility model obtains the purpose that one continuous laser punches n rows of small holes and has the advantages of simple structure, low cost and high utilization rate of laser.

Description

CO

The utility model is a kind of CO, is mainly used in the perforation of cigarette filter yew paper.

Cigarette filter yew paper contacts with flue gas owing to cold air enters filter tip through aperture during smoking behind laser beam perforation, makes tar condensing; CO can fully change into CO simultaneously ₂, thereby the soakage of tar and CO when significantly having reduced smoking, reduce harm to the smoker.Employed laser beam perforation machine is broadly divided into two classes in the prior art.

First kind punch adopts pulse CO ₂Laser instrument, pulse frequency directly determine perforation rate, can be beamed into multi-beam when adopting the higher-wattage laser instrument and beat many rounds simultaneously.This type of laser instrument costs an arm and a leg, and divided beam system complexity when beam splitting is more causes the complete machine cost to rise.In addition, divided beam system causes that easily the beam splitting inequality causes the hole shape of follow-up perforation inconsistent.

The second class punch adopts continuous CO ₂Laser instrument utilizes mechanical organ to modulate, and makes continuous laser convert pulse laser to.The laser beam perforation machine of this structure has the equidistantly aperture of arrangement of a row as shown in Figure 1 on the face of cylinder of chopper wheel 1, play the effect of light modulated hurdle.Middle roller 2 works to transmit paper tape 3.The laser beam line focus mirror 9 of laser instrument 4 outputs focuses on the back and beats on moving paper tape 3 by the aperture of chopper wheel 1, forms required aperture on paper tape 3.This punch is simple in structure, and cost is low, and laser instrument comparative lifetime is long, but exists two shortcomings.The first, laser utilizes the aperture modulation, and the light that does not see through aperture does not work, and is depleted, and makes that the laser utilization rate is low.The second, the reason of modulating owing to light beam makes the hole shape of being worn be Long Circle.

The purpose of this utility model is in order to overcome the shortcoming of above-mentioned prior art, a kind of novel CO to be provided ₂The laser beam perforation machine utilizes a continuous CO ₂Laser tube can be got many row's circular apertures simultaneously, has both accomplished simple in structurely, with low cost, is again good reliability, the punch that the laser utilization rate is high.

The utility model mainly by contain laser instrument 4, along the laser beam G of laser instrument 4 output _rAt first be equipped with modulation on the direction of advance and divide tread assembly 5, divide the collimated laser beam G of tread assembly 5 outputs along modulation _bBe equipped with punch block 6 on the direction of advancing, punch block 6 places on the punch block 8 of paper tape 3.Perforated paper tape 3 is transmitted by paper tape connecting gear 7, is the punch block 8 of paper tape 3 in the middle of the middle roller 2 of paper tape connecting gear 7.As Fig. 2, shown in Figure 4.

Laser instrument 4 adopts continuous CO ₂Laser tube is joined continuous laser power supply and is constituted.Modulation divides tread assembly 5 to comprise along laser beam G _rBe equipped with preposition focus lamp 501, high-speed rotating mirror 502 and rearmounted focus lamp 503 on the direction of advance successively, preposition focus lamp 501 and rearmounted focus lamp 503 are formed the system of a total real focus O, and this focus O position is on the plane of reflection of high-speed rotating mirror 502.Punch block 6 contains two groups of same specifications of putting on adjustable supporting plate 601, with the reflect focalization parts 602 of spline structure.As shown in Figure 2.

It is with list bundle collimated laser beam G that said modulation divides the function of tread assembly 5 _rConvert parallel broadband scanning laser beam G to _bPreposition focus lamp 501 and rearmounted focus lamp 503 are meant the device on the common focus O on the plane of reflection that laser beam can be focused at high-speed rotating mirror 502.Preposition focus lamp 501 and rearmounted focus lamp 503 can be condenser lenses, or focusing mirror, or the combined focus mirror, and the big I of their size and focal length is selected according to the actual requirements.High-speed rotating mirror 502 is positive multi-faceted columns, and each face all plates the rete to laser total reflection, constitutes a mirror surface alone.The plane of reflection of tilting mirror 502 is counted m and can be determined the general desirable m of m span 〉=6 as required.

Above said reflect focalization parts 602 contain a completely reflecting mirror 6021 and by n 〉=2 a focus lamp array 6022 that no gap arranged rectangular shape focus lamp is formed, as shown in Figure 3.Reflect focalization parts 602 are perpendicular to parallel sweep laser beam G _bDirection is put, along scanning laser beam G _bDirection is separated by a distance by the perforation requirement, and its distance is adjustable.Two groups or several groups of reflect focalization parts 602 all place on the adjustable supporting plate 601, and this supporting plate 601 can move along the parallel sweep beam direction.The overall width of the n piece focus lamp that arrange in two or more sets reflect focalization parts 602 no gaps is identical with the width of parallel sweep laser beam.The punch block 8 of paper tape 3 is positioned at the place, focal plane of reflect focalization parts 602, and the direction of motion of paper tape 3 and reflect focalization parts 602 are angled.

Restraint collimated laser beam G by the list that laser instrument 4 sends _rAfter dividing tread assembly 5 to handle, modulation becomes a parallel broadband scanning laser beam G _b, enter reflect focalization parts 602.The band scanning laser beam G of vertical incidence _bWhen mobile, its focus is overlapping, that is the laser beam that moves will obtain a some laser through behind the focus lamp on the focal plane on focusing on minute surface.Thereby the inswept successively reflect focalization parts of parallel sweep laser beam 602 will produce n focus spot during n piece focus lamp altogether, and get n hole on paper tape 3.The multiple scanning of light beam just combines with the mobile phase of paper tape 3 and formed (every group of n/2 row) n row aperture altogether on paper tape 3.The spacing of supporting plate 601 and reflect focalization parts 602 is adjustable to guarantee to get not the aperture of spacing on the same group on the paper tape 3 of different in width.Row's spacing of aperture is by the angle decision of reflect focalization parts 602 with paper tape 3.Aperture pitch of holes on same row is by the linear velocity decision of pulse frequency and paper tape 3.

The reflecting surface number of supposing high-speed rotating mirror 502 is m, and rotating speed is ω, and paper tape 3 linear velocities are v, and then the pulse laser frequency of Huo Deing is that (m * ω), pitch of holes is (v/ (m * ω)).

The n bundle of pulsed laser of the utility model output is stopped any bundle, can get one to n row's aperture according to demand.In addition, conversion n value also can be got any row's aperture, and n gets the even number of n 〉=2.

Paper tape connecting gear 7 is keys of paper disc quality after guaranteeing paper tape 3 movements at the uniform velocity and boring a hole.Paper tape connecting gear 7 mainly contains paper collecting roller 701, puts 702 and 5 middle rollers 2 of paper wheel, as shown in Figure 4.Because paper collecting roller 701 and the diameter of putting the paper disc on the paper wheel 702 constantly change when coil paper, thereby for guaranteeing the linear velocity constant of paper tape 3, paper collecting roller 701, the rotating speed of putting paper wheel 702 are constantly to change.Paper collecting roller 701 is driven by dc speed-regulating motor 703, on the roller 2 speed measuring device 704 is being housed in the middle of one, constitutes closed-loop controls with dc speed-regulating motor 703, with the invariablenes turning speed of roller in the middle of guaranteeing, thereby has guaranteed the linear velocity constant of paper tape 3.Put paper wheel 702 adjustable damping unit 705 is housed, to guarantee the constant tension of paper tape 3.

Advantage of the present utility model: simple in structure, with low cost, laser utilization rate height has been realized getting the purpose that n arranges aperture with a continuous laser pipe.The adjustable degree height of punch block 6, the requirement of spacing, group spacing is arranged in hole shape, pitch of holes, the hole that can satisfy all size paper tape 3 and different size.Can get one as required to the n round.The shape rounding of boring a hole, the edge is bright and clean, high conformity.Paper tape connecting gear 7 has guaranteed the movement at the uniform velocity of paper tape and constant tension force, the quality of paper disc after guaranteeing to bore a hole.

Description of drawings:

Fig. 1 is the laser beam perforation machine schematic diagram of prior art 2 band chopper wheels.Fig. 2 is the utility model CO schematic diagram.Fig. 3 is the schematic diagram of punch block 6, and wherein Fig. 3-1 is to view, and Fig. 3-2 is a side view.Fig. 4 is the schematic diagram of paper tape connecting gear 7.

Embodiment:

As Fig. 2,3,4 structure, wherein laser instrument 4 adopts 50W CO ₂Laser tube is joined continuous laser power supply and is constituted output facula diameter 6mm.The convex-concave condenser lens that preposition focus lamp 501 is circles; Rearmounted focus lamp 503 is the square convex-concave condenser lenses of a block length.Preposition focus lamp 501 is identical with the focal length of rearmounted focus lamp 503.High-speed rotating mirror 502 is positive ten octahedral cylinders that a plane of reflection is counted m=18, and the focus lamp number n=4 in the focus lamp array 6022 has two groups of reflect focalization parts, 602 no gaps and arranges.At high-speed rotating mirror 502 rotating speeds is 3000rpm, and when paper tape 3 linear velocities were 60m/min, the frequency that obtains eight bundle of pulsed laser was 900Hz, and pulse width is 138 microseconds, and institute's pinking spacing is 1.1mm, and hole diameter is less than 0.12mm.

Claims

1. a CO contains laser instrument (4), and the paper tape connecting gear of roller (2) in the middle of perforated paper tape (3) and the band is characterized in that concrete structure is:

(1) the laser beam G that exports along laser instrument (4) _rAt first be equipped with modulation on the direction of advance and divide tread assembly (5);

(2) be equipped with punch block (6) on the direction that the collimated laser beam Gb that divides tread assembly (5) to export along modulation advances;

(3) perforated paper tape (3) is transmitted by paper tape connecting gear (7), is the punch block (8) of paper tape (3) in the middle of the middle roller (2) of paper tape connecting gear (7);

(4) above-mentioned punch block (6) places on the punch block (8) of paper tape (3).

2. according to the laser beam perforation machine of claim 1, it is characterized in that modulation divides tread assembly (5) to comprise on the direction of advancing along laser instrument (4) outgoing laser beam Gr, be equipped with preposition focus lamp (501), high-speed rotating mirror (502) and rearmounted focus lamp (503) successively, focus O Jiao of wherein preposition focus lamp (501) is on the plane of reflection of high-speed rotating mirror (502), the focus of rearmounted focus lamp (503) is also burnt on the plane of reflection of high-speed rotating mirror (502), and burnt on common focus O with preposition focus lamp (501).

3. according to the laser beam perforation machine of claim 1, it is characterized in that punch block (6) contains to place on the pallet (601), divide a tread assembly (a 5) output collimated laser beam G in modulation _bThe reflect focalization parts (602) that constitute by completely reflecting mirror (6021) and focus lamp array (6022) on the direction of advancing.

4. according to the laser beam perforation machine of claim 1, it is characterized in that paper tape connecting gear (7) comprises that to transmit on the direction of advance by paper tape (3) be to have putting paper wheel (702), have rollers (2) in the middle of five of speed measuring device (704) and having the paper collecting roller (701) of dc speed-regulating motor (703) of damping unit (705) successively, in the middle of five rollers (2) middle is the punch block (8) of paper tape (3).

5. according to the laser beam perforation machine of claim 1 or 2, it is characterized in that preposition focus lamp (501) is a condenser lens, or focusing mirror, or the combined focus mirror.

6. according to the laser beam perforation machine of claim 1 or 2, it is characterized in that rearmounted focus lamp (503) is a condenser lens, or focusing mirror, or the combined focus mirror.

7. according to the laser beam perforation machine of claim 1 or 2, it is characterized in that high-speed rotating mirror (502) is the positive multi-faceted column that contains the individual plane of reflection of m (m 〉=6).

8. according to the laser beam perforation machine of claim 1 or 3, the focus lamp array (6022) that it is characterized in that constituting reflect focalization parts (602) does not have the gap by the individual focus lamp of n (n 〉=1) and arranges and constitute.