JP5332526B2 - Surface treatment equipment - Google Patents

Abstract

A surface treatment system enabling the insulating of a conductor through which high-voltage current flows and the disposing of ozone generated. The system includes a discharge electrode 2 and a conductor 3 for connecting the discharge electrode 2 with an electric power unit to modify a surface of a film by an electrical discharge generated by the discharge electrode 2. The discharge electrode 2 is provided inside a casing 11, to which is coupled one end of a duct 12. The conductor 3 is provided inside the duct 21 and an exhaust section 24 is provided at an other end of the duct 21. By arranging the conductor 3 inside the duct 21, the conductor 3 can be insulated from exterior. Further, ozone generated by corona discharge can be exhausted from the exhaust section 24, permitting the ozone to be disposed of by an ozone catalyst or the like.

Description

  The present invention relates to a surface treatment apparatus that performs surface treatment of an object by electric discharge.

Conventionally, as this type of surface treatment apparatus, there are a corona discharge surface treatment apparatus and an atmospheric plasma surface modification apparatus for modifying the surface of an object to be treated such as a film by discharge. As the surface treatment device, corona discharge is generated between the long discharge electrode held by the electrode holder and the earth roll, and the object to be treated such as a film crosses the discharge electrode and is transferred on the earth roll. As a result, the surface of the object to be treated is modified, the discharge electrode is held on a long electrode-side rail along the longitudinal direction of the discharge electrode, and the electrode-side rail is slidably suspended on an electrode holder via a slide unit. There is what is held (for example, Patent Document 1), and by modifying the object to be processed such as a film by corona discharge, the wettability in the subsequent printing process is improved, and the durability of printing is improved.
JP 2002-292272 A

  In the said surface treatment apparatus, even if a film meanders in the left-right direction (lateral movement) for the reason of running and processing a film at high speed, a discharge electrode can track this.

  By the way, in order to perform corona discharge or plasma discharge, it is necessary to supply a high voltage current to the discharge electrode, and using a covered conductor such as a covered cable may cause an electric shock. Moreover, since ozone is generated from the discharge electrode when corona discharge or plasma discharge is performed, it is necessary to treat the generated ozone.

  Then, an object of this invention is to provide the surface treatment apparatus which can perform the insulation of the conductor through which a high voltage current flows, and the process of the generated ozone.

  According to a first aspect of the present invention, there is provided a surface treatment apparatus comprising a discharge electrode and a conductor connecting the discharge electrode and a power source, wherein the discharge electrode is disposed in a case in a surface treatment apparatus that modifies the surface of an object to be treated by discharge by the discharge electrode. In this case, one end of a duct is connected to the case, the conductor is disposed in the duct, the duct and the conductor are separated from each other, and an exhaust portion is provided at the other end of the duct.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, an exhaust fan that sucks air from the case to the exhaust portion is provided.

  In addition to the structure of Claim 1 or 2, the structure of Claim 3 provides the said case so that a movement is possible, and forms the said duct so that expansion and contraction is possible.

  According to a fourth aspect of the present invention, in addition to the structure of the third aspect, the duct is a double pipe that can be expanded and contracted.

  According to a fifth aspect of the present invention, in addition to the structure of the third or fourth aspect, the conductor can be expanded and contracted.

  The structure of Claim 6 is provided with the ozone treatment means which processes the ozone which generate | occur | produced by the said discharge in addition to the structure of any one of Claims 1-5.

  According to a seventh aspect of the present invention, in addition to the structure of the sixth aspect, the ozone treatment means is provided on the downstream side of the exhaust portion of the duct.

  In addition to the structure of any one of Claims 1-7, the structure of Claim 8 generate | occur | produces the corona discharge, and the said discharge electrode is coat | covered with the insulator.

  According to the configuration of claim 1, by disposing the conductor in the duct, insulation from the outside can be achieved, and ozone generated by the discharge is exhausted from the exhaust part of the duct connected to the case. Can do.

  According to the structure of Claim 2, in addition to the effect of Claim 1, exhaust of ozone and heat dissipation of the discharge electrode can be performed efficiently.

  According to the structure of Claim 3, in addition to the effect of Claim 1 or 2, a duct can be expanded-contracted with the movement of a case.

  According to the configuration of claim 4, in addition to the effect of claim 3, the duct can be expanded and contracted by changing the overlap allowance of the double pipe.

  According to the structure of Claim 5, in addition to the effect of Claim 3 or 4, a duct and a conductor can be expanded-contracted with the movement of a case.

  According to the structure of Claim 6, in addition to the effect of any one of Claims 1-5, ozone can be processed by an ozone processing means.

  According to the structure of Claim 7, in addition to the effect of Claim 6, ozone can be processed by the ozone processing means provided in the downstream of the exhaust part of the duct.

  According to the structure of Claim 8, in addition to the effect of any one of Claims 1-7, processing of an aluminum vapor deposition film etc. is attained.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unprecedented surface treatment apparatus is obtained by adopting a new surface treatment apparatus different from the conventional one, and the surface treatment apparatus will be described.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of the present invention. As shown in the schematic explanatory diagram of FIG. 3, the corona discharge surface treatment device as a surface treatment device is a discharge as a corona electrode at a predetermined interval from the earth roll 1. An electrode 2 is arranged, the discharge electrode 2 is connected to a power supply device 4 by a conductor 3, the power supply device 4 and the earth roll 1 are electrically connected, the earth roll 1 is grounded, and a film which is an object to be processed The film 5 is pulled out from the roll R wound with 5, the drawn film 5 is passed between the earth roll 1 and the discharge electrode 2, and the film 5 is modified by corona discharge generated by the discharge electrode 2. The power supply device 4 includes an output unit 6 and a control unit 7 that controls the output unit 6.

  The film 5 in this embodiment can illustrate what the surface is comprised by PP (polypropylene), PE (polyethylene), etc. The size of the film 5 is 40 μm thick, 380 mm wide and 1000 m wound.

  The said surface treatment apparatus is installed in various packaging machines, for example, is used for the printing machine which performs printing, such as a shelf life. Then, after modifying the printing portion of the form 5, the ink adhesion can be improved by printing.

  As shown in FIG. 2 and the like, the discharge electrode 2 includes a pair of electrode bodies 2A and 2A, and the discharge electrode 2 is attached to a case 11, which has an upper surface and four side surfaces 11A, 11B, 11A, and 11B. The lower surface is opened, the discharge electrode 2 is disposed at the position of the lower surface, and a case 11 is provided so as to cover the discharge electrode 2. The side surface 11A is longer than the side surface 11B. By providing the discharge electrode 2 in the case 11 in this way, diffusion of ozone generated during corona discharge is prevented. In addition, the electrode body 2A of the discharge electrode 2 of this embodiment is formed in a columnar shape, the length of the axial center is 125 mm, and the diameter is 16 mm.

  The electrode body 2A is formed in a cylindrical shape, and the outer periphery thereof is covered with an insulator 2B such as ceramic, and the insulator 2B functions as a dielectric. Since the electrode body 2A is formed in a columnar shape and is covered with the insulator 2B in this way, local discharge from the electrode body 2A can be suppressed, so that an aluminum vapor-deposited film having an aluminum layer on the film Surface treatment can be performed. That is, when the local discharge treatment is performed on the aluminum vapor-deposited film, a hole is formed in the aluminum layer, but the electrode body 2A of the present embodiment is covered with the insulator 2B, so that the local discharge is generated. It can be suppressed.

  The case 11 is formed long corresponding to the length direction of the earth roll 1, and the width of the case 11 corresponds to the width of the earth roll 1 and is set slightly larger than the width of the earth roll 1. As shown in FIG. 2, the electrode body 2 </ b> A is provided side by side in the circumferential direction of the earth roll 1. A plurality of slide bodies 12 are provided on the upper surface of the case 11, and a pair of left and right guide rods 13 are arranged on the upper portion of the case 11, and the slide body 12 slides along the plurality of guide rods 13, 13. It is provided to be movable. The guide rod 13 is disposed substantially parallel to the earth roll 1 and is fixed to the machine body of the apparatus.

  One end of a duct 21 is connected to the case 11. The duct 21 is a double pipe including a one-side pipe 22 connected to the side surface 11B and an other-side pipe 23 into which the other end side of the one-side pipe 22 is inserted. The inner diameter of the other side pipe 23 is large, the one side pipe 22 is partially inserted into the other side pipe 23, and an exhaust part 24 that serves as an exhaust port is provided at the other end of the duct 21. Further, the overlap margin between the one side tube 22 and the other side tube 23 is at least larger than the diameter dimension of the one side tube 22. In addition, the overlap allowance is, in other words, the dimension of insertion into the other side tube 23 of the one side tube 22. The one side tube 22 and the other side tube 23 are made of a hard material, have an insulating property, and are made of, for example, transparent polycarbonate, and one side of the one side tube 22 is connected to the case 11. The other side pipe 23 is connected to the exhaust path 32 of the ozone treatment device 31. Further, the duct 21 is disposed so as to intersect with the transport direction of the film 5 and is disposed so as to protrude from the earth roll 1.

  The conductor 3 is provided in the duct 21. The conductor 3 is composed of a one-side conductor 25 and another-side conductor 26 made of a conductive material. The one-side conductor 25 is composed of a tube, and one side of the other-side conductor 26 is slid to the other side of the one-side conductor 25. It is inserted movably. The other conductor 26 can be a hollow tube or a solid member. One end of the one-side conductor 25 and the discharge electrode 2 are electrically connected by a connection member 28.

  Insulating attachment members 27, 27 are fixed on both sides of the one-side conductor 25, and the insulating attachment members 27, 27 are fixed to the one-side tube 22, whereby the one-side conductor 25 is formed at the center of the one-side tube 22. Is attached. In addition, the insulating mounting member 27 is fixed to the other side of the other side conductor 26, and the insulating mounting member 27 is fixed to the other side of the other side tube 23, so that the center of the other side tube 23 is reached. The other side conductor 26 is attached.

  Therefore, when the case 11 is moved along the guide rod 13, the one-side tube 22 moves with respect to the fixed other-side tube 23, and at the same time, the one-side conductor 25 moves with respect to the other-side conductor 26. . In this case, as shown in FIG. 4, it is possible to provide moving drive means 14 that controls the drive so that the case 11, the one-side tube 22, and the one-side conductor 25 move along the guide rod 13.

  As shown in FIG. 4, an ozone treatment device 31 is connected to the exhaust part 24 of the duct 21. The ozone treatment device 31 includes an exhaust passage 32. From the exhaust portion 24 side, the ozone treatment device 31 includes a flow rate detection means 33, a filter 34, an ozone catalyst 35 as an ozone treatment means, an exhaust fan 36, and an ozone concentration detector. They are arranged in the order of 37. Note that the ozone catalyst 35 of the present embodiment uses manganese dioxide.

  By driving the exhaust fan 36, air is sucked from the case 11 to the exhaust path 32 and exhausted, and the flow rate detection means 33 detects the air flow to confirm the operation of the exhaust fan 36. When the exhaust amount is smaller than the preset set amount, the corona discharge surface treatment apparatus is stopped. Further, the filter 34 captures dust mixed in the exhaust gas, and the exhaust gas from which the dust has been removed passes through the ozone catalyst 35, so that the ozone contained in the exhaust gas is decomposed without clogging the ozone catalyst 35. The exhaust gas which has passed through the ozone catalyst 35 and decomposed ozone is sent to the ozone concentration detector 37 through the exhaust fan 36, and the ozone concentration detector 37 measures the amount of ozone in the exhaust gas. And when the measured ozone amount is below a reference value, it exhausts outside. The ozone concentration detector 37 of the present embodiment monitors the amount of ozone passing through the exhaust passage 32, and when the amount of ozone exceeds a preset management concentration, transmits the signal to the control unit 7. The signal transmission means (not shown) is provided. Further, the control unit 7 incorporates a program for stopping the operation of the output unit 6 and stopping power transmission to the conductor 3 when a signal is transmitted to the control unit 7 by the signal transmission means. Therefore, even when the ozone amount exceeds the control concentration, it is safer because the discharge from the discharge electrode 2 can be automatically stopped. The ozone concentration detector 37 of the present embodiment is provided with a signal generating means, but is not necessarily limited to this. When the amount of ozone passing through the exhaust passage 32 exceeds the control concentration, sound or light is emitted. You may provide the alerting | reporting means to alert | report.

  Next, the operation of the corona discharge surface treatment apparatus will be described. A high-voltage current is applied to the discharge electrode 2 through the conductor 3 by the power supply device 4 to generate corona discharge by the discharge electrode 2, and the film 5 is modified by this corona discharge. At this time, since the conductor 3 is not exposed and is accommodated in the duct 21 and insulated from the outside, insulation can be ensured without coating the conductor 3. On the other hand, at the time of corona discharge, the exhaust fan 36 operates, the air containing ozone in the case 11 is sucked and exhausted to the ozone treatment device 31 through the duct 21, and the discharge electrode is caused by the flow of air from the case 11 to the exhaust unit 24. 2 and the heat generated in the conductor 3 are radiated to the outside.

  As described above, in the present embodiment, the discharge electrode 2 and the conductor 3 that connects the discharge electrode 2 and the power supply device 4 that is a power source are provided, and the surface of the film 5 that is the object to be processed is modified by the discharge by the discharge electrode 2. In the corona discharge surface treatment apparatus as the surface treatment apparatus, the discharge electrode 2 is provided in the case 11, one end of the duct 21 is connected to the case 11, the conductor 3 is disposed in the duct 21, and the duct 21 and the conductor 3 Since the exhaust part 24 is provided at the other end of the duct 21, the conductor 3 is disposed in the duct 21 in a state where the duct 21 and the conductor 3 are separated from each other. Further, ozone generated by corona discharge or plasma discharge can be exhausted from the exhaust part 24 of the duct 21 connected to the case 11. Further, in the conventional corona discharge surface treatment apparatus, the duct and the conductor are provided separately, and the apparatus itself is enlarged, but in the corona discharge surface treatment apparatus of the present embodiment, the duct 21 and the conductor 3 are separately provided. Since the conductor 3 is arranged in the duct 21 without being provided, there is an effect that the size is reduced accordingly.

  Further, in this embodiment, since the exhaust fan 36 that sucks air from the case 11 to the exhaust part 24 is provided, exhaust of ozone and heat dissipation of the discharge electrode can be performed efficiently.

  Further, in this embodiment, since the case 11 is provided so as to be movable and the duct 21 is formed to be extendable / contractable, the duct 21 can be expanded / contracted as the case 11 moves.

  Further, in this embodiment, since the duct 21 is a double pipe that can be expanded and contracted, the duct 21 is changed by changing the overlap margin of the one side pipe 22 and the other side pipe 23 constituting the double pipe. Can expand and contract. And since it adjusts with an overlap margin, the pipe material which consists of a hard material can be used for the one side pipe | tube 22 and the other side pipe | tube 23. FIG.

  Further, in this embodiment, since the conductor 3 can be expanded and contracted, the duct 21 and the conductor 3 can be expanded and contracted with the movement of the case 11.

  Further, in this embodiment, since the ozone catalyst 35 serving as an ozone processing means for processing ozone generated by corona discharge or plasma discharge is provided, ozone can be processed by the ozone catalyst 35.

  Further, in this embodiment, since the case 11 is provided on the upstream side of the duct 21 and the ozone catalyst 35 serving as the ozone treatment means is provided on the other end side of the duct 21, it is provided on the downstream side of the exhaust part 24 of the duct 21. The ozone catalyst 35 can treat ozone.

  Further, in this embodiment, since the discharge electrode 2 generates corona discharge and the discharge electrode 2 is covered with the insulator 2B, the local discharge can be suppressed, so that a process such as an aluminum vapor deposition film can be performed. It becomes possible.

  Further, as an effect of the embodiment, since the movement driving unit 14 is provided, the case 11 is moved by the movement driving unit 14 so as to follow the lateral movement even when the film 5 meanders and the printing portion moves laterally. be able to. Moreover, since the duct 21 is formed from a transparent or translucent material and the internal conductor 3 is visible, the state of the conductor 3 in the duct 21 can be confirmed. Further, the inner diameter of the other side tube 23 is larger than the outer diameter of the one side tube 22, and a gap is formed between the other end side of the one side tube 22 and one end side of the other side tube 23 without contact in the inserted state. The one side tube 22 can be moved smoothly. Furthermore, since the overlap margin of the one side pipe 22 and the other side pipe 23 is at least larger than the diameter dimension of the one side pipe 22 and the air is sucked to the exhaust portion 24 side downstream from the case 11, the one side pipe 22 is inserted. Even if there is a gap between the other end of the tube and one end of the other tube 23, ozone does not leak to the outside.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible. For example, in the embodiment, the duct has a double pipe, but the duct is not limited to two, and three or more pipes may be formed into a sheath tube. Similarly, the number of conductors is not limited to two, and three or more conductors may be slidably connected. Further, the filter 34 may be a heat treatment filter for heat treating ozone or an adsorption filter for adsorbing ozone, and these may be used as ozone treatment means. The shape of the case is not limited to the rectangle shown in the embodiment, and can be selected as appropriate. Further, in claim 1, a configuration in which only one duct is used and the duct does not expand and contract may be employed. In this case, only one conductor is used and the conductor does not expand and contract. It goes without saying that may be adopted.

  Moreover, although the discharge electrode 2 of this embodiment was comprised by a pair of electrode body 2A, 2A, it is good also as one electrode body. Further, although the corona discharge surface treatment apparatus is used in this embodiment, an atmospheric plasma surface modification apparatus may be used instead. Further, in the first aspect, air blowing means may be provided on the case side, and air may be sent from the case side to the exhaust section and the exhaust passage by the air blowing means.

It is sectional drawing of the principal part which shows embodiment of this invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. It is a schematic explanatory drawing of an apparatus same as the above. It is a schematic explanatory drawing around an ozone treatment apparatus same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground roll 2 Discharge electrode 2B Insulator 3 Conductor 4 Power supply device (power supply)
5 Film (object to be processed)
11 Case 21 Duct 22 One side pipe 23 Other side pipe 24 Exhaust part 25 One side conductor 26 Other side conductor 31 Ozone treatment device 35 Ozone catalyst (ozone treatment means)
36 Exhaust fan

Claims (8)

In a surface treatment apparatus that includes a discharge electrode and a conductor that connects the discharge electrode and a power source, and that modifies the surface of an object to be processed by discharge by the discharge electrode, the discharge electrode is provided in a case, and a duct is formed in the case. A surface treatment apparatus characterized in that one end of the duct is connected, the conductor is disposed in the duct, the duct and the conductor are separated from each other, and an exhaust portion is provided at the other end of the duct. The surface treatment apparatus according to claim 1, further comprising an exhaust fan that sucks air from the case to the exhaust unit. The surface treatment apparatus according to claim 1, wherein the case is movably provided and the duct is formed to be extendable. The surface treatment apparatus according to claim 3, wherein the duct is a double pipe that can be expanded and contracted. The surface treatment apparatus according to claim 3, wherein the conductor is extendable and contractible. The surface treatment apparatus according to any one of claims 1 to 5, further comprising ozone treatment means for treating ozone generated by the discharge. The surface treatment apparatus according to claim 6, wherein the ozone treatment means is provided on the downstream side of the exhaust portion of the duct. The surface treatment apparatus according to claim 1, wherein the discharge electrode generates corona discharge, and the discharge electrode is covered with an insulator.

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