CN1754694A - Platemaking method and platemaking apparatus - Google Patents
Platemaking method and platemaking apparatus Download PDFInfo
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- CN1754694A CN1754694A CN 200510107676 CN200510107676A CN1754694A CN 1754694 A CN1754694 A CN 1754694A CN 200510107676 CN200510107676 CN 200510107676 CN 200510107676 A CN200510107676 A CN 200510107676A CN 1754694 A CN1754694 A CN 1754694A
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Abstract
The invention provides a plate making method of a printing plate and the plate making device of a print plate. Engraving is conducted by a precise engraving process and a rough engraving process. The precise engraving process uses precise engraving beam of light with small beam diameter to irradiate the flexible photosensitive material at precise engraving pixel intervals. The engraving is conducted until the precise engraving beam of light reaches the maximum depth. The rough engraving process uses rough engraving beam with large beam diameter to irradiate the flexible photosensitive material at rough engraving pixel intervals which are larger than that of the precise engraving pixel intervals, and the engraving is conducted until the beam of light reaches the relief depth.
Description
Technical field
The present invention relates to the method for platemaking of the galley that the galleys such as intaglio printing plate of a kind of relief printing plate to for example flexographic plate etc., intaglio plate etc. make a plate and the automatic platemaker of galley.
Background technology
At present, as the automatic platemaker of such galley, known have a laser engraving machine of putting down in writing in No. 5327167 specification of United States Patent (USP) for example.This laser engraving machine is by utilizing the laser beam flying recording materials that penetrate from LASER Light Source, thereby the surface of recording materials is carved and made relief printing plate, has: LASER Light Source; Be used for modulating modulator (modulator) from the laser beam of this LASER Light Source ejaculation; Recording materials are installed and the log drum that is rotated at its peripheral part; The record shaven head of the laser beam that constitutes with the form that can move, the recording materials irradiation of the peripheral part that is installed in log drum is penetrated from LASER Light Source along direction with the axis parallel of this log drum.
In the automatic platemaker of this relief printing plate,, the sweep speed of laser beam, be the value that the rotary speed of log drum is set to the required maximum carving depth that can access based on the sensitivity of the power and the recording materials of LASER Light Source.And the engraving part more shallow than maximum carving depth, so that the under powered state of the laser beam of irradiation recording materials is carved.
At this moment, owing in the engraving of the recording materials that laser beam carries out, need bigger power, there be the problem of the plate-making needs of galley than the long time.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can shorten the method for platemaking of galley of plate-making time and the automatic platemaker of galley by effective use laser beam.
The purpose of foregoing invention, realize by following method, that is, a kind of method for platemaking of galley, by utilize penetrate from LASER Light Source, corresponding to picture signal modulated laser beam flying recording materials, thereby the surface of recording materials is carved and make galley, it is characterized in that, comprising: the first engraving operation, use laser beam with first beam diameter, with first pel spacing irradiation recording materials, carve up to first degree of depth; The second engraving operation is used the laser beam with second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger than above-mentioned first pel spacing, carves up to second degree of depth darker than above-mentioned first degree of depth.
According to such method for platemaking, can shorten the plate-making time by effective use laser beam.
And, also can replace using laser beam with first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger than above-mentioned first pel spacing, carve up to second degree of depth darker than above-mentioned first degree of depth, otherwise use laser beam with first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, use has the laser beam of second beam diameter littler than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials littler, carve up to second degree of depth than above-mentioned first depth as shallow than above-mentioned first pel spacing.
In a preferable form of implementation, in the engraving operation of the laser beam that uses little beam diameter,, in the engraving operation of the laser beam that uses big beam diameter, make the LASER Light Source impulse hunting by the modulators modulate laser beam.
In another preferable form of implementation, in the engraving operation of the laser beam that uses little beam diameter, make LASER Light Source continuous oscillation or simulation continuous oscillation, in the engraving operation of the laser beam that uses big beam diameter, self come modulating lasering beam with above-mentioned LASER Light Source.
In addition, in another preferable form of implementation, in the engraving operation of the laser beam that uses big beam diameter, above-mentioned recording materials preparation is added to the high temperature of engraving operation of the laser beam of the beam diameter littler than use.
From other viewpoints of the present invention, the present invention is a kind of automatic platemaker of galley, by utilizing the laser beam that penetrates from LASER Light Source that recording materials are scanned, thereby the surface of recording materials is carved and make galley, it is characterized in that, comprise: modulator, it is used to modulate the laser beam that penetrates from above-mentioned LASER Light Source; Log drum is equipped with recording materials at its peripheral part; Electric rotating machine, it makes above-mentioned log drum rotation; Record shaven head, it constitutes the laser beam that irradiation is penetrated from above-mentioned LASER Light Source to the recording materials on the peripheral part that is installed in above-mentioned log drum with the form that can move along the direction with the axis parallel of above-mentioned log drum; Mobile motor, it is used to make above-mentioned record shaven head to move along the direction with the axis parallel of above-mentioned log drum; Beam diameter change mechanism, it changes from the beam diameter of the laser beam of above-mentioned record shaven head ejaculation; Control part, it is by control said modulator, above-mentioned electric rotating machine, above-mentioned mobile motor and above-mentioned beam diameter change mechanism, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger than above-mentioned first pel spacing, carves up to second degree of depth darker than above-mentioned first degree of depth.
From other viewpoints of the present invention, the present invention also has the heating arrangements that the recording materials that are installed on the above-mentioned log drum are heated, above-mentioned control part, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, heating under the state of recording materials by above-mentioned heating arrangements preparation, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger, carve up to second degree of depth darker than above-mentioned first degree of depth than above-mentioned first pel spacing.
Description of drawings
Fig. 1 is the block diagram of the summary of expression laser engraving machine.
Fig. 2 is the schematic diagram of expression record shaven head and log drum.
Fig. 3 is expression AOM (acoustooptical modulator: the schematic diagram of unit acousto-optic modulator).
Fig. 4 is the key diagram that schematically shows the shape of flexible photoreceptor material surface.
Fig. 5 is the key diagram of expression embossment.
Fig. 6 is the flow chart of expression plate-making process.
Fig. 7 is an expression plate-making process flow chart.
Fig. 8 be expression engraving sensitivity Y and by the S/V of the recess of laser beam processing than between the figure of relation.
Fig. 9 is the key diagram that schematically shows the creating method of relief data.
Figure 10 is the schematic diagram of expression based on the engraving state of existing engraving process.
Figure 11 is the schematic diagram of expression based on the engraving state of engraving process of the present invention.
Figure 12 is the schematic diagram of expression based on the engraving state of engraving process of the present invention.
Figure 13 is the key diagram that schematically shows the shape of intaglio printing plate.
Figure 14 is the key diagram of the writing light beam of the accurate engraving of expression operation etc.
Figure 15 is the key diagram that the roughhew of expression first form of implementation is carved the writing light beam of operation.
Figure 16 is the key diagram that the roughhew of expression second form of implementation is carved the writing light beam of operation.
Figure 17 is the key diagram that the roughhew of expression the 3rd form of implementation is carved the writing light beam of operation.
Figure 18 is the key diagram that schematically shows the shape of flexible photoreceptor material surface.
The specific embodiment
Based on accompanying drawing form of implementation of the present invention is described below.
In the following description, at first, at precision engraving operation by using accurate engraving light beam L1 and carving up to depth capacity dp with precision engraving pel spacing pp irradiation flexible photoreceptor material 10, with use thick light beam L2 and with the plain spacing pc irradiation of roughhew imagery flexible photoreceptor material 10 and carve up to the roughhew of relief depth d and carve these two operations of operation and carry out engraving, thereby first feature of the present invention that shortens the plate-making time describes, then, describe under the state of the high plate-making precision of maintenance, shorten second feature of the present invention of plate-making time by effective use laser beam.
Fig. 1 is the block diagram of expression as the summary of the laser engraving machine of the automatic platemaker of relief printing plate of the present invention.
This laser engraving machine has: log drum 11, its peripheral part are equipped with the flexible direct exposure material (hereinafter referred to as " flexible photoreceptor material ") 10 of the recording materials of using as relief printing plate; Record shaven head 12, it constitutes with the form that can move along the direction with the axis parallel of this log drum 11; PC 13, it is as input and output portion and display part; The LASER Light Source 14 that constitutes by gas laser; The control part 15 of control device integral body.
Log drum 11 is connected with electric rotating machine 21, is that the center is rotated with axle 22.This electric rotating machine 21 is connected with motor driver 23.This motor driver 23 is accepted the rotary speed instruction from control part 15, controls the rotation of electric rotating machine 21.The rotary angle position of the rotary speed of electric rotating machine 21 and the log drum 11 that is rotated by electric rotating machine 21 is measured by encoder 24, and this information is sent to control part 15.
Fig. 2 is the schematic diagram of expression record shaven head 12 and log drum 11.
In this record shaven head 12, be provided with object lens 46 and preparation heating arrangements 71.This preparation heating arrangements 71 is used for and will be installed in the flexible photoreceptor material 10 preparation heating of the peripheral part of log drum 11.This prepares heating arrangements 71, for example is to be made of the hot blast blowoff that sprays hot blasts to the flexible photoreceptor material on the peripheral part that is installed in log drum 11 10 or the 10 ultrared Halogen lamp LEDs of irradiation of the recording materials on the peripheral part that is installed in log drum 11 or induction heating device.
Refer again to Fig. 1, at the back segment of LASER Light Source 14, the portion within it of being equipped with is built-in with the AOM unit 41 of AOM (acousto-optic modulator) 72 (with reference to Fig. 3).This AOM unit 41 is by AOM driver 42 and commutation circuit 65, from control part 15 acceptance pattern image signals.Laser beam from LASER Light Source 14 ejaculations, in AOM unit 41 modulated after, by type variable optical beam expander 51, be fixed on a pair of reflective mirror 43,44 on the device, be fixed on reflective mirror 45 and object lens 46 on the record shaven head 12, on the flexible photoreceptor material 10 on the peripheral part that is installed in log drum 11.
AOM unit 41 by the driving of motor 61, but can move between the modulation positions of modulating lasering beam and retreating position.This motor 61 is connected with control part 15 by motor driver 62.
Fig. 3 is the schematic diagram of expression AOM unit 41.
This AOM unit 41, portion disposes AOM72 and planopaallel plate 73 within it.This AOM unit 41 is configured in the retreating position shown in the solid line among Fig. 3 when not carrying out the modulation of laser beam by AOM72.When needs were modulated by AOM72, by the driving of motor 61, AOM72 moved to the modulation positions that is configured in the position shown in the imaginary line among Fig. 3.This modulation positions is that AOM72 is configured in the position in the light path of laser beam.
And, when planopaallel plate 73 is configured in retreating position in AOM unit 41, be configured in the light path of laser beam.When this planopaallel plate 73 is used for being configured in retreating position in AOM unit 41, make laser beam produce the identical skew of skew with the laser beam light path that produces during by AOM72 at laser beam.
Refer again to Fig. 1, type variable optical beam expander 51 is used for by the beam diameter of change from the laser beam of LASER Light Source 14 ejaculations, thereby changes the beam diameter that is radiated at the laser beam on the flexible photoreceptor material 10.This type variable optical beam expander 51 has: the 3 pairs of lens 52,53,54 that constitute optical beam expander; Support these lens to 52,53,54 supporting member 55; Be used for by supporting member 55 is moved, thus make lens to the lens arbitrarily in 52,53,54 to be disposed at ejecting end with AOM unit 41 relative to the travel mechanism 56 with motor etc. of position.This travel mechanism 56 is connected with motor driver 57.This motor driver 57 is accepted instruction from control part 15, make lens to the lens of engraving most in 52,53,54 to be disposed at ejecting end with AOM unit 41 relative to the position.
LASER Light Source 14 is connected with control part 15 by driver 63 and LASER Light Source control part 64.LASER Light Source control part 64 is accepted the index signal of continuous oscillation described later or impulse hunting from control part 15.In addition, LASER Light Source control part 64 passes through commutation circuit 65 from control part 15 acceptance pattern image signals.And commutation circuit 65 is accepted that picture signal sent to LASER Light Source control part 64 or is sent to the switching signal of above-mentioned AOM driver 42 from control part 15.
In this laser engraving machine, modulated from the laser beam that LASER Light Source 14 penetrates at the AOM72 of AOM unit 41, changes beam diameter by type variable optical beam expander 51 after, by reflective mirror 43,44,45 and object lens 46 and from writing down shaven head 12 ejaculations.And, the log drum 11 that flexible photoreceptor material 10 is installed at its peripheral part is under the state of rotation, by record shaven head 12 is moved along the direction with the axis parallel of log drum 11, thereby laser beam scans flexible photoreceptor material 10, carve, on flexible photoreceptor material 10, form relief.Under the situation of not using AOM72, laser beam can self be modulated by LASER Light Source 14 but as described later.
At this moment, in this laser engraving machine, have the precision engraving light beam L1 of little beam diameter and carve the precision engraving operation of the depth capacity dp that can reach and use thick light beam L2 and carve and carve these two operations execution of operation up to the roughhew of relief depth d and carve by use, thereby shortened the plate-making time with the site spacing with the plain spacing pc of roughhew imagery (equating) the irradiation flexible photoreceptor material 10 bigger than precision engraving pel spacing pp with big beam diameter up to precision engraving light beam L1 with precision engraving pel spacing pp irradiation flexible photoreceptor material 10.
Fig. 4 schematically shows to use this laser engraving machine to carve the key diagram of the shape on flexible photoreceptor material 10 surfaces afterwards.In addition, (a) is the plane that is formed on 7 reliefs on the main scanning direction on flexible photoreceptor material 10 among Fig. 4, and (b) is its sectional view among Fig. 4.Also have, in the figure, for convenience of description, show and begin to form the situation that dot area percentage is respectively 7 reliefs of 0%, 1%, 1%, 2%, 2%, 0%, 0% from the left side of figure.
As shown in the drawing, in precision engraving operation, use precision engraving light beam L1 with little beam diameter.And, should be radiated on the flexible photoreceptor material 10 with precision engraving pel spacing pp by precision engraving light beam L1, flexible photoreceptor material 10 is carved up to depth capacity dp from its surface beginning.
This depth capacity dp when the relief of very little dot area percentage is adjacent one another are, makes the carving depth unanimity of the boundary member of these reliefs.Dp is than this hour for this depth capacity, can not well show small site.This depth capacity dp is bigger than it also to be possible, but in this case, carving efficiency worsens.In this form of implementation, be that the carving depth of 1% relief boundary members when adjacent one another are, these reliefs is set at depth capacity dp with dot area percentage.
In this precision engraving operation, carry out from the surface of flexible photoreceptor material 10 engraving of part depth capacity dp, that the shape of site is had a direct impact.Therefore, as engraving pel spacing at this moment, adopt smaller precision engraving pel spacing pp, what (c) schematically showed in the image pattern 4 is such, carries out the engraving under the small unit.At this moment the beam diameter of precision engraving light beam L1, employing can be carried out the little beam diameter of the engraving under the accurate engraving pel spacing pp.
After precision engraving operation, carry out roughhew and carve operation.Carve in the operation at this roughhew, use roughhew to carve light beam L2 with big beam diameter.And, this roughhew is carved light beam L2 be radiated on the flexible photoreceptor material 10 with the plain spacing pc of roughhew imagery, flexible photoreceptor material 10 is carved till the relief depth d from above-mentioned depth capacity dp.Like this,, the zone that quilt is carved in precision engraving operation carves once more, so the carving depth d that flexible photoreceptor material 10 surfaces after execution roughhew operation at quarter begin is bigger than the carving depth dp of precision engraving because carving operation by roughhew.Carve in the operation at this roughhew,, can increase the plain spacing pc of roughhew imagery owing to carried out the engraving of the part that dot shape is not directly influenced.
As the plain spacing pc of roughhew imagery at this moment, can adopt site spacing w.The plain spacing pc of this roughhew imagery can be more than above-mentioned precision engraving pel spacing pp, set arbitrarily in the scope below the spacing w of site.But, make it near site spacing w more, carving efficiency is high more.
Fig. 5 is the key diagram that more accurate expression is formed on the embossment on the flexible photoreceptor material 10.
Parameter as the expression embossment has relief angle θ, relief depth d, is used to constitute the step dt and the level ground face wt of top T.Relief angle θ is a common value in whole reliefs.The relief depth d is that site percentage is the carving depth in zero the part.Also have, step dt is provided with in order to improve dot gain, and level ground face wt is provided with for the mechanical strength that strengthens relief, and when not forming top T self, the value of step dt and level ground face wt is zero.In the above description, describe at the situation of omitting step dt and level ground face wt.
In addition, when adopting embossment shown in Figure 4, above-mentioned depth capacity dp can be calculated by following formula (1).
dp＝(2
1/2·pc/2-wt)tan(θπ/180)+dt ···(1)
Also have, when not forming top T self, step dt and level ground face w substitution zero are got final product.
Below, describe at the plate-making process of the flexible printing plate that uses this laser engraving machine that flexible photoreceptor material 10 is carved.Fig. 6 and Fig. 7 represent the flow process of plate-making process.
When carrying out the plate-making of flexible printing plate, at first, specify embossment and screen line number (step S1) by the operator.This embossment and screen line number are transfused to from PC 13, and send to control part 15.
Then, according to preassigned screen line number, determine site spacing w (step S2).This site spacing w is the inverse of screen line number.
Then, the depth capacity (step S3) of the accurate engraving of computing operation.Use above-mentioned formula (1) to carry out this computing.
Then, the operator specifies exploring degree (step S4).This exploring degree is for example selected from 1200dpi, 2400dpi, 4000dpi.
Then, according to specified exploring degree, determine accurate engraving pel spacing pp (step S5).And, adjust the width of the sub scanning direction of accurate engraving light beam L1, make accurate engraving pel spacing pp almost consistent with the width of the accurate sub scanning direction of carving light beam L1.
Sweep speed v1 (step S6) when then, determining accurate the engraving.This sweep speed v1 be based on accurate engraving pel spacing pp, depth capacity dp, flexible photoreceptor material 10 engraving sensitivity Y, penetrate and shine the power P of the laser beam on the flexible photoreceptor material 10 from LASER Light Source 14, determine by following formula (2).
pp·dp·v1·Y＝P ···(2)
Here, engraving sensitivity Y is the value of the volume V gained carved divided by the quilt by laser beam with the ENERGY E of laser beam.Also have, the ENERGY E of laser beam is to penetrate and be radiated at the multiply each other value of gained of the power of the laser beam on the flexible photoreceptor material 10 and irradiation time from LASER Light Source 14.
Fig. 8 represents above-mentioned engraving sensitivity Y and uses the figure of the surface area of the recess of being carved by laser beam divided by the relation between the S/V ratio of volume gained.
In the figure, transverse axis is represented to use by laser beam the S/V ratio of the surface area of the recess of being carved divided by the volume gained, and the longitudinal axis is represented the engraving sensitivity of being tried to achieve by experiment.
Can be clear and definite from this figure, roughly proportional with S/V and the value engraving sensitivity increases (sensitivity variation just).This is because S/V is big than more, and is just big more with respect to the ratio of the thermal discharge of volume, just can not effectively the energy that is provided is provided carve.Therefore, in order effectively to carve, using S/V is effective than little zone.
In addition, in figure shown in Figure 8, will carve sensitivity and be made as Y, than under the situation that is made as X, following approximate expression (3) is set up with S/V.
Y＝3.21748+0.0577759X ···(3)
Refer again to Fig. 6 and Fig. 7, then, calculate the carving depth dc (step S7) that roughhew is carved operation.This carving depth dc is the value of the depth capacity dp gained when the relief depth d deducts accurate engraving.
Then, determine to carry out the plain spacing pc (step S8) of the roughhew imagery of roughhew during quarter.The plain spacing pc of this roughhew imagery, as mentioned above, spacing w is consistent with the site.
Then, determine the sweep speed v2 (step S9) of roughhew during quarter.This scan velocity V 2 is identical with the situation of sweep speed v1, based on the engraving sensitivity Y of the plain spacing pc of roughhew imagery, carving depth dc, flexible photoreceptor material 10, penetrate and be radiated at the power P of the laser beam on the flexible photoreceptor material 10, determine by following formula (4) from LASER Light Source 14.
pc·dc·v2·Y＝P ···(4)
Then, according to the view data that on flexible photoreceptor material 10, should form, make the relief data (step S10) of the embossment that expression should carve.The view data that becomes the basis is by online or be transferred to control part 15 by off-line via PC 13.Based on this view data, make the relief data.
These relief data are the overlapping data of data that make each relief, in the zone of repeating mutually, make the more shallow high priority data of the degree of depth.
Fig. 9 is the key diagram that schematically shows the creating method of relief data.
The figure shows the state that forms relief 1 and relief 2.The relief data of relief 1 are used in the zone of relief 1 side at the position that the rake of relief 1 and relief 2 contacts, and the relief data of relief 2 are used in the zone of relief 2 sides at the position that the rake of relief 1 and relief 2 contacts.
Then, make the multi-value data (step S11) of accurate engraving usefulness according to the relief data.This multi-value data is to be that the multi-value data up to the engraving of depth capacity dp is carried out in 0% zone with respect to dot area percentage.This multi-value data is made to can be in the stepped data that go up the rake that forms relief shown in (c) among Fig. 4 in dot area percentage is 0%～100% zone.
Then, make the multi-value data (step S12) that roughhew is carved usefulness according to the relief data.This multi-value data is by the zone that is 0% with respect to dot area percentage, considers that dc carves with carving depth on the basis of relief angle θ, thereby finally carries out the such multi-value data of engraving of relief depth d.
Then, control travel mechanism 56 by the control of control part 15, the laser beam of selecting to have passed through type variable optical beam expander 51 becomes the such lens of the needed beam diameter of conduct accurate engraving light beam L1 to 52,53,54 (step S13).Thus, adjust the width of the sub scanning direction of accurate engraving light beam L1, feasible accurate engraving pel spacing pp and the accurate width basically identical of carving the sub scanning direction of light beam L1.
Next carry out precision engraving (step 14).At this moment, control part 15 is controlled the rotary speed of log drum 11 and the translational speed of record shaven head 12 by control motor driver 23,33, makes accurate engraving light beam L1 scan flexible photoreceptor material 10 with above-mentioned sweep speed v1.In addition, control part 15 is by control AOM driver 42, the engraving that carries out up to the inclined plane of depth capacity dp etc.
During this precision engraving, as described later, AOM unit 41 is configured in modulation positions, LASER Light Source 14 continuous oscillation by the control of LASER Light Source control part 64.
Then, control travel mechanism 56 by the control of control part 15, the laser beam of selecting to have passed through type variable optical beam expander 51 becomes as roughhew carves the such lens of the needed beam diameter of light beam L2 to 52,53,54 (step S15).Thus, adjust the width that roughhew is carved the sub scanning direction of light beam L2, make plain spacing pc of roughhew imagery and roughhew carve the width basically identical of the sub scanning direction of light beam L2.
Next carry out roughhew and carve (step S16).At this moment, control part 15 is controlled the rotary speed of log drum 11 and the translational speed of record shaven head 12 by control motor driver 23,33, make roughhew carve light beam L2 with above-mentioned sweep speed v2 in the 10 enterprising line scannings of flexible photoreceptor material.In addition, control part 15 is by control AOM driver 42 or driver 13, carries out the engraving on the inclined plane etc. from depth capacity dp to the relief depth d.By above operation, finish the engraving of relief shown in Figure 4.
When this roughhew is carved, as described later, mode arbitrarily below can adopting.
(1) makes LASER Light Source 14 impulse huntings, AOM unit 41 is disposed at retreating position.
(2) make LASER Light Source 14 impulse huntings, AOM unit 41 is disposed at modulation positions.
(3) make LASER Light Source 14 continuous oscillations, AOM unit 41 is disposed at retreating position.
In addition, when this roughhew is carved, 10 preparations of flexible photoreceptor material are heated by preparation heating arrangements 71.
Then, the engraving time of more existing method for platemaking and method for platemaking of the present invention.But following relatively is to make LASER Light Source 14 continuous oscillations, does not prepare heating, the situation of modulating by AOM72.
Existing engraving process
For example, as shown in figure 10, use to have and the accurate laser beam of carving the identical beam diameter of light beam L1, S and V when having carved the recess of wide 21.2 μ m, dark 500 μ m with sweep speed L (mm/s) represent that with following formula the S/V ratio is about 98.
S＝(0.5×2+0.0212×2)·L＝1.0424L
V＝0.5·0.0212·L＝0.0106·L
And with S/V during than the X of 98 substitution following formulas (3), engraving sensitivity Y becomes 9.86 (J/mm
3).At this moment, when the area of setting carving area is that A, maximum carving depth (the relief degree of depth) are during for d, carve region-wide required energy and become AdY=9.86Ad, when setting the power that penetrates and be radiated at the laser beam on the flexible photoreceptor material 10 from LASER Light Source 14 and be P, engraving time te is expressed from the next.
te＝9.86·A·d/P
When making the engraving area A is 1000000 (mm
2), the relief depth d is 0.5 (mm), when the power P that penetrates and be radiated at the laser beam on the flexible photoreceptor material 10 from LASER Light Source 14 is 200 (W), engraving time te is about 6.8 hours.
About engraving process of the present invention
At first, in order to carry out precision engraving, as shown in figure 11, use accurate engraving light beam L1, S and V when having carved the recess of wide 21.2 μ m, dark 119.7 μ m with sweep speed L (mm/s) are expressed from the next, and the S/V ratio is about 111.And, as 119.7 μ m of carving depth by above-mentioned formula (1) computing gained.
S＝(0.1197×2+0.0212×2)·L＝0.2818L
V＝0.1197·0.0212·L＝0.00253764·L
And when S/V was input to the X of following formula (3) than 111, engraving sensitivity Y became 10.7 (J/mm
3).At this moment, when the area of setting carving area is A, when depth capacity was dp, then carving the required energy in whole zone became AdpY=10.7Adp, when setting the power that penetrates and be radiated at the laser beam on the flexible photoreceptor material 10 from LASER Light Source 14 and be P, engraving time t1 is expressed from the next.
t1＝10.7·A·dp/P
When making the engraving area A is 1000000 (mm
2), depth capacity dp is the power P of 0.1197 (mm), LASER Light Source 14 when being 200 (W), engraving time t1 is about 1.7789 hours.
Then, carve in order to carry out roughhew, as shown in figure 12, use roughhew to carve light beam L2, S and V when having carved the recess of wide 84.7 μ m, dark 308.3 μ m with sweep speed L (mm/s) are expressed from the next, and the S/V ratio is about 28.9.And, deduct depth capacity dp gained as 308.3 μ m of carving depth from the relief depth d, be based on as 84.7 μ m of engraving width that the plain spacing pc of roughhew imagery determines.
S＝(03803×2+0.0847×2·L＝0.93L
V＝0.3803·0.0854/·L＝0.032211·L
And when S/V was imported the X of following formulas (3) than 28.9, engraving sensitivity Y became 5.18 (J/mm
3).At this moment, when the area of setting carving area is A, when carving depth was dc, carving the required energy in whole zone was AdcY=5.18Adc, when setting the power that penetrates and be radiated at the laser beam on the flexible photoreceptor material 10 from LASER Light Source 14 and be P, engraving time t2 is expressed from the next.
t1＝5.18·A·dc/P
If making the engraving area A is 1000000 (mm
2), depth capacity dp is 0.3803 (mm), when the power P that penetrates and be radiated at the laser beam on the flexible photoreceptor material 10 from LASER Light Source 14 is 200 (W), engraving time t2 is about 2.7361 hours.
It is 4.515 hours that thereby above-mentioned accurate engraving time t1 and roughhew are carved the engraving time t of time t2 addition gained.This carves time t, than existing engraving time te (6.8 hours), becomes the time that has significantly shortened.
In addition, though in above-mentioned form of implementation, will use as recording materials as the flexible photoreceptor material of one of relief printing plate, but for the intaglio printing plate of intaglio plate etc., the present invention also can be suitable under the situation of recess even recording materials are formed by laser engraving.
Figure 13 is the key diagram of shape that schematically shows the intaglio version of this form of implementation.
As shown in the drawing, when carrying out the plate-making of intaglio printing plate, also be in precision engraving operation, to use precision engraving light beam L1 with little beam diameter.Thereby should be radiated on the intaglio printing plate with precision engraving pel spacing pp by precision engraving light beam L1, to depth d p intaglio printing plate is carved from its surface.
In addition, carve in the operation, use roughhew to carve light beam L2 with big beam diameter at roughhew.Be radiated on the intaglio printing plate with the plain spacing pc of roughhew imagery thereby this roughhew is carved light beam L2, intaglio printing plate carved from above-mentioned depth d p to depth d.Like this, because the zone of carve by precision engraving operation is carved operation by roughhew and carved once more, so roughhew is carved the carving depth d that begins from intaglio version surface after operation is carried out, the carving depth dp that carves than precision is big.Carve in the operation at this roughhew, because the part that does not directly influence cell configuration is carved, so can increase the plain spacing pc of roughhew imagery.
Below, describe under the state of the high plate-making precision of maintenance, shorten second feature of the present invention of plate-making time by effective use LASER Light Source.
At first, study at the waveform of LASER Light Source 14.
General LASER Light Source can switch continuous oscillation and impulse hunting.And the peak power during the peak power ratio continuous oscillation during impulse hunting is big.For example under the situation of carbonic acid gas laser, the degree of the several times of the peak power the when peak power during impulse hunting is continuous oscillation and even 10 times, under the situation of YAG laser, about 100 times of the peak power the when peak power during impulse hunting is continuous oscillation.And when the engraving and printing version, peak power is big more, can prevent dispersing of heat more and effectively carves.
On the other hand, the peak frequency during impulse hunting is about 100kHz.If it is just enough that the above-mentioned roughhew of this frequency is carved operation, but to carry out then deficiency of precision engraving operation.Therefore, in roughhew is carved operation, make LASER Light Source 14 impulse huntings and carve, in precision engraving operation, when making LASER Light Source 14 continuous oscillations, carve by other modulators modulate laser beam.Thus, laser beam can be effectively used, under the situation of the high plate-making precision of maintenance, the plate-making time can be shortened.
Below, study at having or not of modulator.
For example, AOM72 can carry out the High Speed Modulation of 1MHz degree, but the employed germanium of AOM72, and the transmission rate variance of laser beam, laser beam produce the loss of a few percent in AOM72.Therefore, carve when in roughhew is carved operation, utilizing LASER Light Source 14 self modulating lasering beam, and in precision engraving operation, modulate when carving, can effectively use laser beam by modulator, under the situation of the high plate-making precision of maintenance, can shorten the plate-making time.
In addition, also can when carrying out precision engraving operation, make LASER Light Source 14 simulation continuous oscillations.Then make from the laser beam of this LASER Light Source 14 ejaculations and modulate by AOM72.
Can consider following such mode as the mode that makes LASER Light Source 14 simulation continuous oscillations.
For example, when from driver 63 when LASER Light Source 14 is supplied with the driving signal of the high frequency that is higher than the answer speed degree, though LASER Light Source 14 impulse huntings look it is to penetrate continuous laser beam.Perhaps, when 63 pairs of LASER Light Sources of driver 14 are supplied with the driving signal of high power (デ ユ one テ イ),, look it is to penetrate continuous laser beam though also be LASER Light Source 14 impulse huntings.Like this, make LASER Light Source 14 simulation continuous oscillations, provide picture signal to come modulating lasering beam from commutation circuit 65 to AOM driver 42 simultaneously, flexible photoreceptor material 10 is carried out the precision engraving.
Study at the preparation heating below.
For example, known when having used flexible photoreceptor material 10, in advance flexible photoreceptor material 10 is heated to 100, improve the working (machining) efficiency of 30% left and right sides laser beam.Therefore, if prepare heating like this, just can effectively carve.But carried out under the situation of preparation heating, 10 thermal expansions of flexible photoreceptor material, its dimensional accuracy worsens.In addition, when heating-up temperature was uneven, the relief degree of depth can produce deviation.Therefore, in roughhew is carved operation, prepare heating and carve, in precision engraving operation, do not prepare heating, when perhaps carving, can under the situation of the high plate-making precision of maintenance, shorten the plate-making time to prepare heating than the low temperature of roughhew operation at quarter.
Based on above prerequisite, just the form of implementation to the plate-making process of flexible photoreceptor material 10 shown in Figure 4 describes.
At first, describe about precision engraving operation.Figure 14 is the key diagram of the writing light beam of the accurate engraving of expression operation etc.
In precision engraving operation, as mentioned above, because carving depth is superficial, so sweep speed is fast, and, because pel spacing is little, need to improve modulating frequency.Therefore, in precision engraving operation, AOM unit 41 is disposed at modulation positions.In addition, by the control of LASER Light Source control part 64, make LASER Light Source 14 continuous oscillations or simulation continuous oscillation.And,, picture signal is input in the AOM driver 42 by commutation circuit 65.In this case, as shown in figure 14, can the laser beam of continuous oscillation be modulated by the modulation signal that modulation efficiency is changed, form writing light beam.So in precision engraving operation,, do not prepare heating in order to obtain high engraving precision.
Below, first form of implementation of carving operation with regard to roughhew describes.Figure 15 is that the roughhew of expression first form of implementation is carved the writing light beam ground key diagram of operation.
Carve in the operation at roughhew, because carving depth is deep, so sweep speed is slow, and, because pel spacing is big, so modulating speed also can slowly.Therefore, carve in the operation, make AOM unit 41 move to retreating position at the roughhew of this first form of implementation.In addition, the control by LASER Light Source control part 64 makes LASER Light Source 14 impulse huntings.And,, make picture signal be input to LASER Light Source control part 64 by commutation circuit 65.And then, by preparation heating arrangements 71 preparation heating flexible photoreceptor materials 10.In this case, as shown in figure 15, laser beam itself is modulated by LASER Light Source 14.By like this, can penetrate the laser beam of the big impulse hunting of peak power from LASER Light Source 14.So, because with LASER Light Source 14 modulating lasering beams own, so the light loss of the laser beam that causes because of AOM72 can not take place.And, because flexible photoreceptor material 10 is prepared heating, so can effectively carve.Therefore, can shorten the plate-making time.
Below, second form of implementation of carving operation at roughhew describes.Figure 16 is the key diagram that the roughhew of expression second form of implementation is carved the writing light beam of operation.
Roughhew in this second form of implementation is carved in the operation, makes AOM unit 41 move to modulation positions.In addition, the control by LASER Light Source control part 64 makes LASER Light Source 14 vibrate with certain strength pulse.And,, picture signal is input in the AOM driver 42 by commutation circuit 65.And then, by preparation heating arrangements 71 preparation heating flexible photoreceptor materials 10.In this case, as shown in figure 16, can modulate laser beam with certain output impulse hunting, form writing light beam by the modulation signal that modulation efficiency has been changed.In this case, can penetrate the laser beam of the big impulse hunting of peak power from LASER Light Source 14.And, because being prepared, heated flexible photoreceptor material 10, so can effectively carve.So can shorten the plate-making time.In addition, because used the modulation signal of AOM72 to modulate, can correctly modulate.
Below, the 3rd form of implementation of carving operation at roughhew describes.Figure 17 is the key diagram that the roughhew of expression the 3rd form of implementation is carved the writing light beam of operation.
Roughhew in the 3rd form of implementation is carved in the operation, makes AOM unit 41 move to retreating position.In addition, by the control of LASER Light Source control part 64, make LASER Light Source 14 continuous oscillations.And,, picture signal is input in the LASER Light Source control part 64 by commutation circuit 65.And then, by preparation heating arrangements 71 preparation heating flexible photoreceptor materials 10.In this case, as shown in figure 17, laser beam is modulated by LASER Light Source itself.At this moment, though little from the peak power of the laser beam of LASER Light Source 14, because self come modulating lasering beam, so the light loss of the laser beam that causes because of AOM72 can not take place with LASER Light Source 14.And, because flexible photoreceptor material 10 is prepared heating, so can effectively carve.So can shorten the plate-making time.
And, in above-mentioned form of implementation, in precision engraving operation, end the preparation heating in order to obtain high engraving precision., in precision engraving operation,, also can under the situation of the high precision of maintenance, effectively carve by carrying out carving the low preparation heating of process temperature than roughhew.
Yet the preparation heating neither be necessary in roughhew operation at quarter.
In addition, in above-mentioned form of implementation, by AOM72 is moved to retreating position, AOM72 just is not positioned on the light path of the laser of LASER Light Source 14 ejaculations., AOM72 itself is moved, and by setting suitable circuitous light path, also can make the laser that penetrates from LASER Light Source 14, and the lens that incide type variable optical beam expander 51 are to any one the lens centering in 52,53,54 not via AOM72.
And, in the above-mentioned form of implementation, though for example understand engraving, also can when making the such recording materials rotation cylindraceous of intaglio plate cylinder for example, implement direct engraving corresponding to picture signal to this recording materials surface to the recording materials that twist in the sheet on the log drum 11.
In addition, in above-mentioned form of implementation, the laser beam that in precision engraving operation, penetrates, have little beam diameter, be used for carving up to depth capacity dp as first degree of depth with precision engraving pel spacing pp as first pel spacing as first beam diameter, carve the laser beam that penetrates in the operation at roughhew, have big beam diameter, be used for carving up to relief depth d as second degree of depth with as the plain spacing pc of the roughhew imagery of second pel spacing as second beam diameter.
And, be after the precision engraving, to carry out roughhew to carve in the above-mentioned form of implementation., the order of engraving is not limited thereto.Also can carry out roughhew at first carves and to carry out precision then and carve.In this case, also can be than the situation shortening sweep time of only carrying out the image record by the precision engraving.Illustrate with Figure 18.
Figure 18 is the key diagram that schematically illustrates the shape on same flexible photoreceptor material 10 surfaces that illustrate with the previous Fig. 4 of use.In addition, (a) is the plane that is formed on 7 reliefs on the main scanning direction on flexible photoreceptor material 10 among Figure 18, (b) carries out roughhew to flexible photoreceptor material 10 to carve sectional view afterwards among Figure 18, and (c) carries out accurate engraving sectional view afterwards again to carrying out the flexible photoreceptor material 10 of roughhew after quarter among Figure 18.Also have, in Figure 18, for convenience of description, show and begin to form the situation that dot area percentage is respectively 7 reliefs of 0%, 1%, 1%, 2%, 2%, 0%, 0% from the left side of figure.
Carve in the operation at the roughhew shown in (b) among Figure 18, carve in the zone outside the zone (i.e. the zone that dot shape is had a direct impact) of carving should only utilizing accurate engraving.Promptly shine flexible photoreceptor material 10 with the plain spacing pc of roughhew imagery (equating), thereby remove the dash area among the figure with the site spacing by roughhew being carved light beam L2.The dot shape that forms thus each relief does not have the direct inclined plane that influences etc.
The depth capacity ddc of the engraving that this stage carries out, and before about equally with the carving depth dc of Fig. 4 explanation.
In addition, carve in the operation, because the part that does not directly influence dot shape is carved, so can increase the plain spacing pc of roughhew imagery at this roughhew.
And, such as previously described carrying out this roughhew during quarter, can adopt following any-mode.
(1) makes LASER Light Source 14 impulse huntings, AOM unit 41 is disposed at retreating position.
(2) make LASER Light Source 14 impulse huntings, AOM unit 41 is disposed at modulation positions.
(3) make LASER Light Source 14 continuous oscillations, AOM unit 41 is disposed at retreating position.
In addition, when this roughhew is carved, 10 preparations of flexible photoreceptor material are heated by preparation heating arrangements 71.
Roughhew is carved after operation finishes, and then precision is carved light beam L1 and shines flexible photoreceptor material 10 with the precision engraving pel spacing pp littler than the plain spacing pc of roughhew imagery and implement accurate engraving.This stage, (dash area a) and to dot shape zone (dash area b) influence, that do not carve the relief depth d that does not reach expectation by previous roughhew was implemented engraving for the zone that dot shape is had a direct impact shown in (c) among Figure 18.Like this, because carve zone that operation carve by the precision engraving and carved once more through roughhew, thus carry out the carving depth d that begin from flexible photoreceptor material 10 surfaces after the accurate engraving operation, bigger than the carving depth ddc at roughhew quarter.And the carving depth ddp of the regional b in the accurate engraving operation and maximum carving depth dp are about equally.In addition, in the precision engraving, make LASER Light Source 14 continuous oscillations or simulation continuous oscillation such as described above.
The situation of carrying out accurate engraving like this after roughhew is carved also can form suitable embossment.At this moment, carve the laser beam that penetrates in the operation at roughhew, has big beam diameter as first beam diameter, be used for roughhew imagery element spacing pc as first pel spacing, carve up to the relief depth d as first degree of depth, the laser beam that penetrates in precision engraving operation has the little beam diameter as second beam diameter, be used for carving up to depth capacity dp as second degree of depth with precision engraving pel spacing pp as second pel spacing.
Claims (26)
1. the method for platemaking of a galley, by utilize penetrate from LASER Light Source, corresponding to picture signal modulated laser beam flying recording materials, thereby the surface of recording materials is carved and is made galley, it is characterized in that, comprising:
The first engraving operation is used the laser beam with first beam diameter, with first pel spacing irradiation recording materials, carves up to first degree of depth;
The second engraving operation is used the laser beam with second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger than above-mentioned first pel spacing, carves up to second degree of depth darker than above-mentioned first degree of depth.
2. the method for platemaking of galley as claimed in claim 1 is characterized in that, above-mentioned galley is relief printing plate.
3. the method for platemaking of galley as claimed in claim 2 is characterized in that, above-mentioned first degree of depth is the carving depth that site percentage is roughly the boundary member of zero relief these reliefs when adjacent one another are.
4. the method for platemaking of galley as claimed in claim 1 is characterized in that, above-mentioned galley is intaglio printing plate.
5. the method for platemaking of galley as claimed in claim 1 is characterized in that, determines the sweep speed of the above-mentioned first engraving operation according to the power of above-mentioned first pel spacing, above-mentioned first degree of depth, the sensitivity of recording materials, above-mentioned LASER Light Source.
6. the method for platemaking of galley as claimed in claim 1 is characterized in that, determines the sweep speed of the above-mentioned second engraving operation according to the power of above-mentioned second pel spacing, above-mentioned second degree of depth, the sensitivity of recording materials, above-mentioned LASER Light Source.
7. the method for platemaking of galley as claimed in claim 1 is characterized in that, in the above-mentioned first engraving operation, makes above-mentioned LASER Light Source continuous oscillation or simulation continuous oscillation,
In the above-mentioned second engraving operation, make above-mentioned LASER Light Source impulse hunting.
8. the method for platemaking of galley as claimed in claim 1 is characterized in that, in the above-mentioned first engraving operation, and by the modulators modulate laser beam,
In the above-mentioned second engraving operation, by above-mentioned LASER Light Source self modulating lasering beam.
9. the method for platemaking of galley as claimed in claim 1 is characterized in that, in the above-mentioned second engraving operation, above-mentioned recording materials preparation is heated to than the high temperature of the above-mentioned first engraving operation.
10. the method for platemaking of a galley, by utilize penetrate from LASER Light Source, corresponding to picture signal modulated laser beam flying recording materials, thereby the surface of recording materials is carved and is made galley, it is characterized in that, comprising:
The first engraving operation is used the laser beam with first beam diameter, with first pel spacing irradiation recording materials, carves up to first degree of depth;
The second engraving operation is used the laser beam with second beam diameter littler than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials littler than above-mentioned first pel spacing, carves up to second degree of depth than above-mentioned first depth as shallow.
11. the method for platemaking of galley as claimed in claim 10 is characterized in that, above-mentioned galley is relief printing plate.
12. the method for platemaking of galley as claimed in claim 11 is characterized in that, above-mentioned second degree of depth is the carving depth that site percentage is roughly the boundary member of zero relief these reliefs when adjacent one another are.
13. the method for platemaking of galley as claimed in claim 10 is characterized in that, above-mentioned galley is intaglio printing plate.
14. the method for platemaking of galley as claimed in claim 10 is characterized in that, determines the sweep speed of the above-mentioned first engraving operation according to the power of above-mentioned first pel spacing, above-mentioned first degree of depth, the sensitivity of recording materials, above-mentioned LASER Light Source.
15. the method for platemaking of galley as claimed in claim 10 is characterized in that, determines the sweep speed of the above-mentioned second engraving operation according to the power of above-mentioned second pel spacing, above-mentioned second degree of depth, the sensitivity of recording materials, above-mentioned LASER Light Source.
16. the method for platemaking of galley as claimed in claim 10 is characterized in that, in the above-mentioned first engraving operation, makes above-mentioned LASER Light Source impulse hunting,
In the above-mentioned second engraving operation, make above-mentioned LASER Light Source continuous oscillation or simulation continuous oscillation.
17. the method for platemaking of galley as claimed in claim 10 is characterized in that, in the above-mentioned first engraving operation, and by above-mentioned LASER Light Source self modulating lasering beam,
In the above-mentioned second engraving operation, by the modulators modulate laser beam.
18. the method for platemaking of galley as claimed in claim 10 is characterized in that, in the above-mentioned first engraving operation, above-mentioned recording materials preparation is heated to than the high temperature of the above-mentioned second engraving operation.
19. the automatic platemaker of a galley scans recording materials by utilizing the laser beam that penetrates from LASER Light Source, thereby the surface of recording materials is carved and made galley, it is characterized in that, comprising:
Modulator, it is used to modulate the laser beam that penetrates from above-mentioned LASER Light Source;
Log drum is equipped with recording materials at its peripheral part;
Electric rotating machine, it makes above-mentioned log drum rotation;
Record shaven head, it constitutes the laser beam that irradiation is penetrated from above-mentioned LASER Light Source to the recording materials on the peripheral part that is installed in above-mentioned log drum with the form that can move along the direction with the axis parallel of above-mentioned log drum;
Mobile motor, it is used to make above-mentioned record shaven head to move along the direction with the axis parallel of above-mentioned log drum;
Beam diameter change mechanism, it changes from the beam diameter of the laser beam of above-mentioned record shaven head ejaculation;
Control part, it is by control said modulator, above-mentioned electric rotating machine, above-mentioned mobile motor and above-mentioned beam diameter change mechanism, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger than above-mentioned first pel spacing, carves up to second degree of depth darker than above-mentioned first degree of depth.
20. the automatic platemaker of galley as claimed in claim 19 is characterized in that, also has the LASER Light Source control part that makes above-mentioned LASER Light Source impulse hunting and continuous oscillation,
Above-mentioned control part, under the state that makes above-mentioned LASER Light Source continuous oscillation or simulation continuous oscillation, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, under the state that makes above-mentioned LASER Light Source impulse hunting, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger, carve up to second degree of depth darker than above-mentioned first degree of depth than above-mentioned first pel spacing.
21. the automatic platemaker of galley as claimed in claim 19 is characterized in that, also has:
Be used to modulate modulator from the laser beam of above-mentioned LASER Light Source ejaculation;
But the modulator travel mechanism that said modulator is moved between the modulation positions of modulating lasering beam and retreating position,
Above-mentioned control part, said modulator is being disposed under the state of modulation positions, use has the laser beam of first beam diameter, by shining recording materials with first pel spacing by the laser beam after the said modulator modulation, carve after first degree of depth, said modulator is being disposed under the state of retreating position, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, by with the second pel spacing irradiation recording materials bigger, carving up to second degree of depth darker than above-mentioned first degree of depth than above-mentioned first pel spacing by the laser beam after above-mentioned LASER Light Source self modulation.
22. the automatic platemaker of galley as claimed in claim 19 is characterized in that, also has the heating arrangements that the recording materials that are installed on the above-mentioned log drum are heated,
Above-mentioned control part, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, heating under the state of recording materials by above-mentioned heating arrangements preparation, use has the laser beam of second beam diameter bigger than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials bigger than above-mentioned first pel spacing, carves up to second degree of depth darker than above-mentioned first degree of depth.
23. the automatic platemaker of a galley scans recording materials by utilizing the laser beam that penetrates from LASER Light Source, thereby the surface of recording materials is carved and made galley, it is characterized in that, comprising:
Modulator, it is used to modulate the laser beam that penetrates from above-mentioned LASER Light Source;
Log drum is equipped with recording materials at its peripheral part;
Electric rotating machine, it makes above-mentioned log drum rotation;
Record shaven head, it constitutes the laser beam that irradiation is penetrated from above-mentioned LASER Light Source to the recording materials on the peripheral part that is installed in above-mentioned log drum with the form that can move along the direction with the axis parallel of above-mentioned log drum;
Mobile motor, it is used to make above-mentioned record shaven head to move along the direction with the axis parallel of above-mentioned log drum;
Beam diameter change mechanism, it changes from the beam diameter of the laser beam of above-mentioned record shaven head ejaculation;
Control part, it is by control said modulator, above-mentioned electric rotating machine, above-mentioned mobile motor and above-mentioned beam diameter change mechanism, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, use has the laser beam of second beam diameter littler than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials littler than above-mentioned first pel spacing, carves up to second degree of depth darker than above-mentioned first degree of depth.
24. the automatic platemaker of galley as claimed in claim 23 is characterized in that, also has the LASER Light Source control part that makes above-mentioned LASER Light Source impulse hunting and continuous oscillation,
Above-mentioned control part, under the state that makes above-mentioned LASER Light Source impulse hunting, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, under the state that makes above-mentioned LASER Light Source continuous oscillation or simulation continuous oscillation, use has the laser beam of second beam diameter littler than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials littler, carve up to second degree of depth darker than above-mentioned first degree of depth than above-mentioned first pel spacing.
25. the automatic platemaker of galley as claimed in claim 23 is characterized in that, but also has the modulator travel mechanism that the said modulator of making moves between the modulation positions of modulating lasering beam and retreating position,
Above-mentioned control part, said modulator is being disposed under the state of above-mentioned retreating position, use has the laser beam of first beam diameter, by shining recording materials with first pel spacing by the laser beam after above-mentioned LASER Light Source self modulation, carve after first degree of depth, said modulator is being disposed under the state of modulation positions, use has the laser beam of second beam diameter littler than above-mentioned first beam diameter, by with the second pel spacing irradiation recording materials littler, carving up to second degree of depth darker than above-mentioned first degree of depth than above-mentioned first pel spacing by the laser beam after the said modulator modulation.
26. the automatic platemaker of galley as claimed in claim 23 is characterized in that, also has the heating arrangements that the recording materials that are installed on the above-mentioned log drum are heated,
Above-mentioned control part, heating under the state of recording materials by above-mentioned heating arrangements high temperature preparation, use has the laser beam of first beam diameter, with first pel spacing irradiation recording materials, carve after first degree of depth, contrast is not carried out the low recording materials of heating-up temperature by above-mentioned heating arrangements, use has the laser beam of second beam diameter littler than above-mentioned first beam diameter, with the second pel spacing irradiation recording materials littler, carve up to second degree of depth darker than above-mentioned first degree of depth than above-mentioned first pel spacing.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004286175A JP2006095931A (en) | 2004-09-30 | 2004-09-30 | Plate making method and plate making apparatus for printing plate |
| JP2004-286175 | 2004-09-30 | ||
| JP2004286175 | 2004-09-30 | ||
| JP2004357586A JP2006159800A (en) | 2004-12-10 | 2004-12-10 | Method and equipment for making printing plate |
| JP2004357586 | 2004-12-10 | ||
| JP2004-357586 | 2004-12-10 |
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| CN1754694A true CN1754694A (en) | 2006-04-05 |
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| GB9009406D0 (en) * | 1990-04-26 | 1990-06-20 | Zed Instr Ltd | Printing cylinder engraving |
| US5831745A (en) * | 1995-01-19 | 1998-11-03 | Dainippon Screen Mfg. Co., Ltd. | Gravure engraving system using two signals out of phase with each other for engraving a plurality of cells on a surface of a gravure cylinder |
| US5654125A (en) * | 1995-05-01 | 1997-08-05 | E. I. Du Pont De Nemours And Company | Laser apparatus and process of use |
| ES2233523T3 (en) * | 2001-05-25 | 2005-06-16 | Stork Prints Austria Gmbh | PROCEDURE AND DEVICE FOR THE MANUFACTURE OF A PRINT MOLD. |
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2004
- 2004-09-30 JP JP2004286175A patent/JP2006095931A/en not_active Abandoned
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2005
- 2005-09-29 CN CN 200510107676 patent/CN1754694B/en not_active Expired - Fee Related
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| CN1754694B (en) | 2010-05-12 |
| JP2006095931A (en) | 2006-04-13 |
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