JP2013043408A - Manufacturing apparatus for letterpress printing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce sticking and deposition of decomposition products, produced from a plate material during laser engraving and having stickiness at a dust collection system including piping.SOLUTION: A manufacturing apparatus for letterpress printing plate forms a relief part on the surface of a plate material by irradiating the plate material fitted on the outer peripheral surface of a drum 10 with a laser beam from the exposure head 30 of a laser engraving machine. The decomposition products produced during the laser engraving are sucked in from a suction hood 120 together with air blown from a blow nozzle 110, and air separated by the filter of a dust collecting machine 100 is discharged from an exhaust port 142. A jet port for supplying zeolite adsorbing the decomposition products is provided nearby the opening of the suction hood 120, and the filter of the dust collecting machine 100 separates the zeolite having adsorbed the decomposition products from the air.

Description

  The present invention relates to an apparatus for producing a relief printing plate, and more particularly to an apparatus for producing a relief printing plate for producing a relief plate by laser engraving a plate material such as resin or rubber.

  As a conventional apparatus for producing a relief printing plate of this type, a laser beam is applied from an exposure head 2 to a plate material (flexographic printing plate material) 5 such as a resin attached to the outer peripheral surface of a rotating drum 1 as shown in FIG. It is known that the plate material is laser engraved by irradiating a part of the plate material by irradiation to form a relief image on the surface of the plate material.

  During the laser engraving, a decomposition product (ablation residue) is generated from the plate material. In order to minimize the scattering of the decomposition product, the decomposition product is sucked by the suction hood 3.

  Patent Document 1 describes that air is blown to a laser engraving unit that is engraved by being irradiated with a laser beam, a decomposition product generated in the laser engraving unit is sucked, passed through a filter in a dust collector, and then exhausted outdoors. There is.

  On the other hand, Patent Document 2 discloses an apparatus for separating and collecting adhesive particles. This separation and recovery device introduces the spheroidized toner into a cyclone separator and separates it into product and air. The bag filter removes dust-containing air containing a small amount of toner in the air that cannot be completely separated by the cyclone separator. The toner is separated from the air, and clean air is discharged to the atmosphere.

  In order to prevent clogging of the bag filter, the adsorbent is sprayed onto the pipe from the cyclone separator to the bag filter, and the adsorbent is brought into contact with the dust-containing air exhausted from the cyclone separator. A film made of an adsorbent is formed on the surface of the particles to reduce the adhesive force of the adhesive particles. Thereby, adhesion of the adhering particles to the filter is prevented, or even when adhering particles adhere to the filter, the adhering particles can be easily removed by backwashing the filter.

  Patent Document 3 discloses a fume collector used for collecting fumes such as dust, dust, smoke, gas, and metal powder generated during laser processing and welding.

  In this fume collector, a so-called precoat agent having adsorbability and deodorizing properties represented by calcium carbonate and zeolite is attached to the filter surface in advance to form a coat layer, and fumes contained in the suction air are removed. Fume is collected while preventing the filter from being clogged by adsorbing and collecting it on the coating layer.

JP 2007-144910 A JP 2006-35037 A Japanese Patent Laying-Open No. 2005-152834

  The laser engraving printing plate manufacturing apparatus described in Patent Document 1 is designed to remove decomposition products with a filter in a dust collector. However, since the decomposition products of the flexographic plate material are sticky, The following problems occur when the decomposition product deposits and adheres to the suction hood, the inner wall of the pipe, and the filter surface of the dust collector.

  (1) The inner diameter of the pipe is reduced and the suction air volume is reduced.

  (2) Dust collection capacity decreases due to clogging of dust collector filter.

  When the dust collection capability is reduced, ablation debris is scattered in the apparatus, and the lens of the exposure head 2 and the interior of the apparatus are contaminated with debris (if the lens is contaminated, the image quality is affected). In addition, as distribution of the adhesion amount of adhesion debris, there is much adhesion to the outer side (dashed line part 4 of FIG. 9) of the air flow.

  In order to prevent a decrease in the dust collection performance, it is necessary to frequently clean the piping and replace the filter, which is complicated and reduces the operating rate. In addition, although it takes about 1 hour to make a single plate, it is not possible to replace the filter from the beginning to the end of laser engraving, and it is impossible to avoid a decrease in dust collection performance during laser engraving. There is a problem.

  On the other hand, the apparatus for separating and collecting adhering particles described in Patent Document 2 injects adsorbent into the piping from the cyclone separator to the bag filter to prevent clogging of the bag filter and adsorbs it to the dust-containing air. Although the materials are brought into contact with each other to prevent the adhesion of the adhering particles to the bag filter, the adhering particles cannot be prevented from adhering to the cyclone separator or the inner wall of the supply cylinder in the preceding stage of the cyclone separator.

  Further, the fume collector described in Patent Document 3 cannot prevent the accumulation of fumes in the pipes leading to the collector.

  Patent Documents 2 and 3 do not describe a dust collector that collects decomposition products generated from a plate material during laser engraving.

  The present invention has been made in view of such circumstances, it is possible to reduce the adhesion and deposition in the dust collection system including the piping of the decomposition product having adhesiveness generated from the plate material during laser engraving, An object of the present invention is to provide a relief printing plate manufacturing apparatus capable of suppressing a decrease in dust collection performance.

  In order to achieve the above object, the invention according to one aspect of the present invention is characterized in that the plate material attached to the outer peripheral surface of the drum is projected on the surface of the plate material by irradiating laser light from an exposure head of a laser engraving machine. In the relief printing plate manufacturing apparatus that forms the part, a suction hood that is provided in the vicinity of the exposure head of the laser engraving machine and sucks together with air the decomposition products generated during laser engraving of the plate material by the laser engraving machine, A pipe for exhausting air sucked from the suction hood from an exhaust port, and a dust collector provided in the pipe, and having a filter for separating decomposition products sucked together with air from the suction hood from the air; A dust collector for exhausting the air separated by the filter from the exhaust port, and a spout in the vicinity of the mouth of the suction hood, An adsorbent supply means for supplying an adsorbent that adsorbs the decomposition product from a jet outlet, and the filter of the dust collector separates the adsorbent adsorbing the decomposition product and air. .

  According to the relief printing plate manufacturing apparatus according to one aspect of the present invention, since the adsorbent is supplied from the vicinity of the mouth of the suction hood, the decomposition product having adhesiveness generated from the plate at the time of laser engraving is adsorbed. It is possible to prevent sticky decomposition products from adhering and accumulating on the inner wall of the pipe from the suction hood to the exhaust port, and the filter of the dust collector provided in the middle of the pipe. Clogging can be prevented. Thereby, the fall of the dust collection performance at the time of laser engraving can be suppressed.

  In the letterpress printing plate manufacturing apparatus according to another aspect of the present invention, the adsorbent supply means circulates and supplies the adsorbent in the dust collector from the jet outlet through an adsorbent supply pipe. I have to. Thereby, the adsorbent which did not couple | bond with the decomposition product or the adsorbent whose adsorption performance did not fall can be used repeatedly.

  In the relief printing plate manufacturing apparatus according to still another aspect of the present invention, it is preferable that the dust collector has a scraping means for scraping off the adsorbent adsorbing the decomposition products deposited on the surface of the filter. The performance of the filter and the amount of suction air can be maintained by removing the adsorbent adsorbing the decomposition products deposited on the filter surface by the removing means. As the removing means, one that blows compressed air (pulse jet) from the back surface of the filter or one that vibrates the filter can be applied. In addition, since the decomposition product having adhesiveness is adsorbed by the adsorbent, it can be easily removed from the filter surface.

  In the letterpress printing plate manufacturing apparatus according to still another aspect of the present invention, it is preferable that the dust collector has pre-coating means for depositing the adsorbent on the surface of the filter. Thereby, clogging of the filter by the decomposition product having adhesiveness can be reliably prevented. The pre-coating means can deposit the adsorbent on the surface of the filter by operating the adsorbent supply means and supplying the adsorbent before starting the laser engraving.

  In the relief printing plate manufacturing apparatus according to still another aspect of the present invention, it is preferable that the dust collector has at least one of a deodorizing filter and an exhaust filter at a subsequent stage of the filter. As a result, it is possible to remove odors and fine dust that cannot be removed by the preceding filter.

  In the apparatus for manufacturing a relief printing plate according to still another aspect of the present invention, the apparatus has a spray nozzle disposed at a position facing the suction hood across the exposure head of the laser engraving machine, and the air is discharged from the spray nozzle. It is preferable to further include an air supply means for spraying. By supplying air from the spray nozzle arranged at the position facing the suction hood, it is possible to create an air flow in the laser engraving unit and minimize the scattering of decomposition products generated from the plate during laser engraving. The decomposition product can be efficiently sucked together with the air blown from the blowing nozzle.

  In the relief printing plate manufacturing apparatus according to still another aspect of the present invention, the spray nozzle sprays air in a direction perpendicular to a laser beam emitted from an exposure head of the laser engraving machine, and the suction hood includes It is preferable to have a suction opening wider than the air that is blown from the spray nozzle and spreads. Thereby, almost the air blown from the blowing nozzle can be sucked from the suction opening of the suction hood, and the air blown from the blowing nozzle can be prevented from diffusing.

  In the relief printing plate manufacturing apparatus according to still another aspect of the present invention, the spray nozzle sprays air toward an exposure point on the plate material of a laser beam emitted from an exposure head of the laser engraving machine. I have to. As a result, air can be blown immediately on the decomposition product generated from the plate material, and scattering of the decomposition product can be kept to a minimum.

  In an apparatus for manufacturing a relief printing plate according to still another aspect of the present invention, sub-scanning means for moving the exposure head in the sub-scanning direction of the drum, and movement of the exposure head in the sub-scanning direction by the sub-scanning means. A suction hood drive means for moving the suction hood in synchronism, and a pipe having a predetermined length from the suction hood has flexibility to bend as the suction hood moves, and It is preferably fixed at the position of the length. The decomposition products whose adhesiveness has been reduced by the adsorbent are likely to accumulate on the inner wall of the pipe in the range from the suction hood to about 1 m, but this part of the pipe can be decomposed by bending it along with the movement of the suction hood. The adsorbent combined with the product can be dropped.

  In the apparatus for manufacturing a relief printing plate according to still another aspect of the present invention, the decomposition hood is provided with vibration means for applying vibration to the suction hood, and is attached to a pipe having a predetermined length from the suction hood. The adsorbent combined with the object can be dropped. The vibration means can shake off the suction hood after the laser engraving is completed, so that the suction hood or an adsorbent combined with a decomposition product attached to a pipe having a predetermined length can be removed from the suction hood. . As the vibration means, suction hood driving means for moving the suction hood in synchronization with the movement of the exposure head in the sub-scanning direction can be used as a vibration source.

  According to the present invention, since the adsorbent is supplied from the vicinity of the mouth of the suction hood that sucks in the decomposition product generated during laser engraving, the adsorbent and the decomposition product having adhesiveness are combined to form a decomposition product. It is possible to reduce the adhesion of the dust collector filter installed in the middle of the pipe, and to prevent the decomposition products from adhering to and accumulating on the inner wall of the pipe from the suction hood to the exhaust port. Clogging can be prevented. Thereby, the fall of the dust collection performance at the time of laser engraving can be suppressed.

Schematic which shows the whole structure of the manufacturing apparatus of the relief printing plate which concerns on this invention. The figure which shows the detailed structure of the laser engraving machine used for the manufacturing apparatus of a relief printing plate Perspective view showing shapes of spray nozzle and suction hood The figure which shows embodiment of the filter box contained in a dust collector The figure which shows embodiment of the injection opening of the suction hood and the adsorbent supply pipe provided in this suction hood Diagram showing suction hood moving relative to drum The figure used in order to explain other embodiments of a spray nozzle The figure which shows other embodiment of the injection opening of the suction hood and the adsorbent supply pipe provided in the vicinity of this suction hood The figure used to explain the problems of conventional letterpress printing plate manufacturing equipment

  Embodiments of a relief printing plate manufacturing apparatus according to the present invention will be described below with reference to the accompanying drawings.

[Configuration example of letterpress printing plate manufacturing equipment]
FIG. 1 is a schematic view showing the overall configuration of a relief printing plate manufacturing apparatus according to the present invention. As shown in FIG. 1, the relief printing plate manufacturing apparatus 1 mainly includes a main scanning unit including a drum 10, a semiconductor laser diode light source unit (LD light source unit 20 (see FIG. 2)), and a sub-scan including an exposure head 30. And a dust collection system including the dust collector 100.

  FIG. 2 is a diagram showing a detailed configuration of a laser engraving machine used in a relief printing plate manufacturing apparatus.

  As shown in FIG. 2, this relief printing plate manufacturing apparatus winds a sheet-like plate material F around the outer peripheral surface of a drum 10 having a cylindrical shape, and the drum 10 is in the direction of arrow R (main scanning direction) in FIG. The laser beam corresponding to the image data of the image to be engraved on the plate material F is emitted from the exposure head 30 of the laser engraving machine 12 toward the plate material F, and the exposure head 30 is orthogonal to the main scanning direction. The two-dimensional image is engraved (recorded) on the surface of the plate F at a high speed by scanning at a predetermined pitch in the sub-scanning direction (arrow S direction in FIG. 1). Here, the plate material F is a resin plate or a rubber plate for flexographic printing.

  A laser engraving machine 12 used in an apparatus for producing a relief printing plate includes an LD light source unit 20 that generates laser light, an exposure head 30 that irradiates the plate material F with laser light generated by the LD light source unit 20, and an exposure head. And an exposure head moving unit 40 that moves 30 along the sub-scanning direction.

  The LD light source unit 20 includes a plurality of semiconductor lasers 21, and the light of each semiconductor laser 21 is individually transmitted to the optical fiber array unit 300 of the exposure head 30 via the optical fiber 70.

  Each semiconductor laser 21 is arranged side by side on the light source substrate 24. Each semiconductor laser 21 is individually coupled to one end of an optical fiber 22, and the other end of the optical fiber 22 is connected to an adapter of an SC type optical connector 25.

  The adapter substrate 23 that supports the SC type optical connector 25 is vertically attached to one end of the light source substrate 24. Further, an LD driver substrate 27 on which an LD driver circuit (not shown in FIG. 2) for driving the semiconductor laser 21 is mounted is attached to the other end portion of the light source substrate 24. Each semiconductor laser 21 is connected to a corresponding LD driver circuit via an individual wiring member 29, and each semiconductor laser 21 is individually driven and controlled.

  On the other hand, the exposure head 30 is provided with an optical fiber array unit 300 that collects and emits laser beams emitted from the plurality of semiconductor lasers 21. The light emitting section of the optical fiber array section 300 has a structure in which the emitting ends of a plurality of optical fibers 70 guided from the respective semiconductor lasers 21 are arranged in a line.

  Further, in the exposure head 30, a collimator lens 32, an opening member 33, and an imaging lens 34 are arranged in order from the light emitting unit side of the optical fiber array unit 300. An imaging optical system is configured by the combination of the collimator lens 32 and the imaging lens 34. The opening member 33 is disposed so that the opening is positioned at the far field when viewed from the optical fiber array unit 300 side. As a result, an equivalent light amount limiting effect can be given to all the laser beams emitted from the optical fiber array unit 300.

  The exposure head moving unit 40 is provided with a ball screw 41 and two rails 42 arranged so that the longitudinal direction thereof is along the sub-scanning direction, and a sub-scanning motor (not shown in FIG. 2) that rotationally drives the ball screw 41. The exposure head 30 disposed on the ball screw 41 can be moved in the sub-scanning direction while being guided by the rail 42. Further, the drum 10 can be driven to rotate in the direction of arrow R in FIG. 2 by operating a main scanning motor (not shown in FIG. 2), thereby performing main scanning.

  By repeating the exposure scanning by the rotation of the drum 10 in the main scanning direction and the intermittent feeding of the exposure head 30 in the sub-scanning direction, a relief image of a desired convex portion is formed on the entire surface of the plate material F.

<Dust collection system>
Next, a dust collection system including the dust collector 100 that collects decomposition products generated by laser engraving will be described.

  As shown in FIG. 1, a spray nozzle 110 and a suction hood 120 are disposed in the vicinity of the exposure head 30 of the laser engraving machine, with the exposure head 30 being sandwiched. The spray nozzle 110 and the suction hood 120 are The suction hood drive means (not shown) can move in synchronization with the movement of the exposure head 30 in the sub-scanning direction.

  The spray nozzle 110 blows air in a direction perpendicular to the optical axis of the laser beam emitted from the exposure head 30 during laser engraving, and has a sticky decomposition product generated from the plate material F during laser engraving by airflow. Blow away (gas, ablation debris, dust).

  The suction hood 120 sucks the decomposition product blown off by the air flow together with the air blown from the blowing nozzle 110, and is connected to the dust collector 100 via a pipe 130.

  As shown in FIG. 3, the blowing nozzle 110 is a wide nozzle, and the air 112 blown from the blowing nozzle 110 gradually spreads, but the suction opening 120 </ b> A of the suction hood 120 is formed in an opening larger than the widened air 112. The blown air 112 can be almost recovered. The nozzle 110 may be a round nozzle (round type).

  That is, the suction amount of air sucked through the suction hood 120 includes the supply amount of air supplied from the spray nozzle 110 and the supply amount of air supplied together with the adsorbent from a jet outlet 232 (FIG. 5) described later. It is set as mentioned above, Preferably it increases several times more than the supply air from the spray nozzle 110 and the supply air from the jet nozzle 232.

  The dust collector 100 includes a filter box 102 and a dust collector body 104.

  FIG. 4 is a diagram showing an embodiment of the filter box 102. In the filter box 102, two cylindrical filters 1022, 1023 and a pulse generator 1024 are disposed in a container 1021 having a tapered bottom, and an air injection nozzle 1025 is disposed at the bottom of the container 1021. Has been configured. The number of cylindrical filters is not limited to two.

  A pipe 130 to which the suction hood 120 is connected is connected to the connection port 1026 of the filter box 102, and an adsorbent is supplied between the bottom of the container 1021 and the vicinity of the mouth of the suction hood 120 (see FIG. 5). A tube 230 is connected.

  The bottom of the filter box 102 contains an adsorbent that binds to the decomposition products (in this embodiment, zeolite 108), and is stored in the bottom of the filter box 102 by blowing compressed air from the air injection nozzle 1025. The zeolite 108 that has been used can be supplied to the suction hood 120 via the adsorbent supply pipe 230.

  As shown in FIG. 5, the suction hood 120 is provided with a jet outlet 232 connected to the adsorbent supply pipe 230, and the zeolite 108 is jetted and supplied from the jet outlet 232 into the suction hood 120.

  The decomposition product sucked together with the air supplied from the spray nozzle 110 at the time of laser engraving is combined with the zeolite 108 jetted and supplied from the jet outlet 232, and is sucked into the filter box 102 of the dust collector 100 through the pipe 130. The A blower that generates a suction force is provided in the dust collector main body 104.

  The filter box 102 switches the suction path so that one of the two filters 1022 and 1022 is used. Thereby, the zeolite which adsorb | sucked the decomposition product accumulates on the surface of the filter in use. In addition, the filter box 102 blows compressed air (pulse jet) from the pulse generator 1024 to the back side of the filter for an unused filter, and removes the zeolite adsorbing the decomposition products deposited on the filter surface. . In addition, since the decomposition product which has adhesiveness couple | bonds with a zeolite and adhesiveness has fallen, it can be easily wiped off from the filter surface. Further, the removing mechanism for removing deposits from the filter surface is not limited to the pulse generator 1024 that generates a pulse jet, and a mechanism that electrically or manually vibrates the filter may be used.

  By switching between the two filters 1022 and 1023 in this way, the filter performance and the suction air volume can be maintained from the start to the end of laser engraving.

  Further, the zeolite that has been removed from the filter or the zeolite 108 that has not adhered to the filter and deposited on the bottom of the container 1021 is supplied (circulated) to the suction hood 120 again. Thereby, the zeolite which was not couple | bonded with the decomposition product or the zeolite which the adsorption | suction performance did not fall can be used repeatedly.

  The air that has passed through the filter box 102 of the dust collector 100 is supplied to the dust collector body 104 (FIG. 1) connected to the filter box 102. A dust collector main body 104 shown in FIG. 1 collects odors and fine dust that cannot be collected by the filter box 102, and includes a deodorizing filter using activated carbon, an exhaust filter such as a HEPA filter, and a blower (blower). . As this kind of dust collector main body 104, an existing one having the above function can be used.

  The air exhausted from the dust collector main body 104 is exhausted to the outside through the exhaust port 142 via the pipe 140.

<Discharge of zeolite adhering to the inner wall of the pipe>
The decomposition product whose adhesiveness has been lowered by zeolite is likely to be deposited on the inner wall of the pipe in the range from the suction hood 120 to about 1 m.

  As shown in FIG. 6, a flexible hose is used as the pipe 130 as shown in FIG. 6, and the hose is fixed by the fixing part 132 in order to wipe off deposits accumulated on the inner wall of the pipe ranging from the suction hood 120 to about 1 m. Fix it.

  Accordingly, the hose between the suction hood 120 that moves in the sub-scanning direction and the fixed portion 132 bends according to the position of the suction hood 120 that moves. The hose is fixed by the fixing portion 132, and the fixing position and fixing direction are determined so that the hose bends greatly. In the embodiment shown in FIG. 6, the hose tip is fixed to the left side in FIG. 6, but may be fixed to the right side.

  The suction hood 120 is moved in accordance with the movement of the exposure head 30 in the sub-scanning direction, but the hose connected to the suction hood 120 is bent along with the movement of the suction hood 120 and deposits accumulated on the inner wall of the hose. (Decomposition product having reduced adhesiveness due to binding with zeolite) can be removed.

  Further, vibration means for applying vibration to the suction hood 120 may be provided, and deposits attached to the suction hose 120 or the hose having a predetermined length from the suction hood 120 may be removed. As a vibration means in this case, a suction hood drive means for moving the suction hood 120 in the sub-scanning direction is used as a vibration source, and the suction hood 120 is vibrated (reciprocated in small increments in the sub-scanning direction) after the laser engraving is completed. Can be configured. Further, after the laser engraving is completed, the hose is vibrated (may be struck) by another vibration source.

[Others]
The spray nozzle 110 shown in the embodiment of FIG. 1 blows air in a direction perpendicular to the optical axis of the laser light emitted from the exposure head 30 during laser engraving, but the present invention is not limited to this. You may make it spray air toward the exposure point on the plate material of a laser beam like the spray nozzle 110 'shown. As a result, air can be immediately blown against the decomposition products generated from the plate material, and the decomposition products can be prevented from adhering to the exposure head 30.

  In addition, as shown in FIG. 8, a zeolite outlet 233 may be provided in a pipe immediately below the suction hood 120. In this case, the zeolite can be diffused in a sprayed manner by the air sucked from the suction hood 120 (air having a high flow velocity). In addition, a bulging portion 234 is provided in a pipe on the downstream side of the jet port 233, where the flow rate of air is slowed down to promote the coupling between the zeolite and the decomposition product.

  In addition, precoat means for depositing zeolite in advance on the surfaces of the filters 1022 and 1023 of the filter box 102 may be provided. According to this, it is possible to reliably prevent clogging of the filter by the adhesive decomposition product. As a pre-coating means, zeolite can be deposited on the surfaces of the filters 1022 and 1023 by supplying zeolite to the suction hood 120 for a certain period of time before the start of laser engraving. In addition, zeolite can be precoated on the inner wall of the pipe 130 between the suction hood 120 and the dust collector 100, and adhesion of decomposition products can be reduced.

  In this embodiment, zeolite is circulated and supplied from the dust collector 100 (filter box 102) to the vicinity of the mouth of the suction hood. However, the present invention is not limited to this, and zeolite may be supplied from a dedicated adsorbent supply means. .

  In the dust collector 100 of this embodiment, the filter box 102 and the dust collector main body 104 are separately configured and connected. However, the present invention is not limited to this, and may be configured integrally.

  Furthermore, the adsorbent applied to the present invention is not limited to zeolite, and other adsorbents such as calcium carbonate may be used.

  Moreover, it goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Drum, 12 ... Laser engraving machine, 30 ... Exposure head, 100 ... Dust collector, 102 ... Filter box, 104 ... Dust collector main body, 108 ... Zeolite, 110, 110 '... Spray nozzle, 120 ... Suction hood, 130, 140 ... Pipe, 142 ... exhaust port, 230 ... adsorbent supply pipe, 232, 233 ... jet outlet, 1022, 1023 ... filter, 1024 ... pulse generator, 1025 ... air injection nozzle

Claims (10)

In an apparatus for producing a relief printing plate that forms convex portions on the surface of the plate material by irradiating the plate material attached to the outer peripheral surface of the drum with laser light from an exposure head of a laser engraving machine,
A suction hood that is provided in the vicinity of an exposure head of the laser engraving machine and sucks together with air a decomposition product generated during laser engraving of the plate material by the laser engraving machine;
Piping for exhausting air sucked from the suction hood from the exhaust port;
A dust collector provided in the pipe, having a filter that separates decomposition products sucked together with air from the suction hood from the air, and a dust collector that exhausts air separated by the filter from the exhaust port;
A suction port provided near the mouth of the suction hood, and an adsorbent supply means for supplying an adsorbent for adsorbing the decomposition products from the jet port,
The apparatus for producing a relief printing plate, wherein the filter of the dust collector separates an adsorbent adsorbing the decomposition products and air.   2. The relief printing plate manufacturing apparatus according to claim 1, wherein the adsorbent supply unit circulates and supplies the adsorbent in the dust collector through the adsorbent supply pipe through the adsorbent supply pipe. 3.   3. The relief printing plate manufacturing apparatus according to claim 1, wherein the dust collector has a removing unit that removes the adsorbent adsorbing the decomposition products deposited on the surface of the filter.   The apparatus for producing a relief printing plate according to any one of claims 1 to 3, wherein the dust collector has a precoat means for depositing the adsorbent on the surface of the filter.   5. The relief printing plate manufacturing apparatus according to claim 1, wherein the dust collector has at least one of a deodorizing filter and an exhaust filter at a subsequent stage of the filter.   6. The apparatus according to claim 1, further comprising: a blowing nozzle disposed at a position facing the suction hood across the exposure head of the laser engraving machine, and further comprising an air supply unit that blows air from the blowing nozzle. 2. An apparatus for producing a relief printing plate according to item 1. The spray nozzle sprays air in a direction perpendicular to the laser beam emitted from the exposure head of the laser engraving machine,
The apparatus for producing a relief printing plate according to claim 6, wherein the suction hood has a suction opening wider than air blown from the spray nozzle.   The relief printing plate manufacturing apparatus according to claim 6, wherein the spray nozzle sprays air toward an exposure point on the plate material of laser light emitted from an exposure head of the laser engraving machine. Sub-scanning means for moving the exposure head in the sub-scanning direction of the drum;
Suction hood drive means for moving the suction hood in synchronization with movement of the exposure head in the sub-scanning direction by the sub-scanning means,
The pipe of a predetermined length from the suction hood has flexibility to bend as the suction hood moves, and is fixed at a position of the predetermined length. An apparatus for producing a relief printing plate according to the item.   10. The apparatus according to claim 1, further comprising: an oscillating unit that applies vibration to the suction hood, wherein the suction hood or an adsorbent combined with the decomposition product attached to a pipe having a predetermined length is removed from the suction hood. 2. An apparatus for producing a relief printing plate according to item 1.

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