JP2008012672A - Neutralization apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a neutralization apparatus capable of efficiently neutralizing a molded product regardless of the size or quantity of the molded product and capable of reducing economical load. <P>SOLUTION: A neutralization apparatus 14 equipped with mutually opposed rod-shaped neutralizing devices 14A and 14B are provided at the upper part of the molded product recovery system 13 provided in the vicinity of a resin molding machine 1 and by deflecting the radiation direction of positive ions 18 and negative ions 19 toward the intersection of the direction of the crossing point O of two diagonal lines C4 and C5, connecting the discharge electrodes 14a and 14b of the rod-shaped neutralizing device 14A and the discharge electrodes 14a or 14b same in polarity of the rod-shaped neutralizing device 14B and by synergistic action of the increasing action, of the radiation distance of the positive ions 18 and the negative ions 19 directing the reverse polarity of the discharge electrodes 14a and 14b, and the deflection action deflecting to the discharge electrode 14a, 14b side of the reverse discharge polarity, a region where both ions 18 and 19 do not act on the molded product 17 arranged on an symmetric axis C3 is eliminated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a static eliminator.

  Conventionally, it is known that various adverse effects occur when a resin molded product (hereinafter referred to as a molded product) molded by an injection molding machine (hereinafter referred to as a resin molding machine) is charged. As a result, the molded product requiring high accuracy is neutralized.

  Therefore, an apparatus including a static eliminator that uses a molded product as a static elimination object has been proposed (Patent Document 1) and (Patent Document 2).

  The apparatus described in Patent Document 1 includes a transport unit that receives a molded product taken out from a resin molding machine by a molded product take-out machine from the molded product take-out machine and transports the molded product to a molded product collection device. A blower type static eliminator, that is, a static eliminator in which ions radiated from the discharge electrode are blown onto the molded product by a fan is disposed. Therefore, the molded product received by the conveying means is neutralized in the process of being conveyed to the molded product recovery device.

  On the other hand, the apparatus described in Patent Document 2 includes a transfer means for receiving a molded product taken out from the resin molding machine by the molded product take-out machine from the molded product take-out machine and transferring it to the stock means, and in the vicinity of the transfer means. A static eliminator having a structure in which the fan is omitted is arranged. Therefore, the molded product received by the transfer means is discharged in the process of being transferred to the stock means.

JP 2001-79856 A JP-A-8-96425

  However, in the apparatus described in Patent Document 1, the direction of ion emission tends to fluctuate due to subtle effects of fan discharge air pressure / air volume, indoor air convection in a molding plant, and the like. For this reason, in a small molded product obtained by taking a large number, there may be a difference in the amount of ion radiation depending on the arrangement position, and there is a possibility that all of the molded product obtained in a large number cannot be uniformly discharged. It is not possible to remove electricity efficiently. Further, in a large molded product that has been removed, there may be a difference in the amount of ion radiation at the center and the vicinity thereof and the outer peripheral edge and the vicinity thereof, which may result in a state where the entire area of the molded product cannot be uniformly discharged. It is difficult to remove electricity efficiently. Therefore, in order to remove electricity efficiently, the number of installed static eliminators must be increased, which increases the economic burden.

  On the other hand, in the apparatus described in Patent Document 2, a static eliminator is disposed, for example, on the upper side of a molded product whose axis is oriented horizontally, and ions are radiated downward from the static eliminator, whereby ions on both the front and back surfaces of the molded product. The flow is made to work evenly. However, in the case of a molded product with the axis lined sideways, that is, a vertically radiated molded product, for example, having a structure that emits ions downward from the upper side, a large number of small molded products are arranged on the upper side. There is a difference in the amount of ion radiation between the molded product placed below and the molded product placed on the lower side, and there is a possibility that all of the molded products taken out may not be uniformly discharged. Can not do it. In addition, in a large molded product that has been removed, there is a risk that the amount of ions emitted from the upper region, the central region, and the lower region in the vertical direction may be different, and the entire region of the molded product may not be uniformly discharged. However, it is not possible to remove the charge efficiently. Therefore, in order to remove electricity efficiently, the number of installed static eliminators must be increased, which increases the economic burden.

  The present invention solves such a problem, and an object of the present invention is to be able to remove electricity efficiently regardless of the size and quantity of the object to be removed, while being economical. The object is to provide a static eliminator that can reduce the burden.

  According to the present invention, in a static eliminator having a plurality of discharge electrodes, a pair of static eliminators in which + and-discharge electrodes are arranged are arranged so as to face each other so as to radiate + and-ions while being spaced apart from each other. In addition, the discharge electrodes having opposite polarities face each other between the pair of static eliminators.

  According to this, when ions are radiated from each discharge electrode, the ions radiated from the discharge electrodes of opposite polarities facing each other between the pair of static eliminators are attracted to each other. The radiation distance of ions toward the discharge electrode increases. Further, when ions are radiated from each discharge electrode, the ions radiated from the discharge electrode are attracted to each other in each static eliminator, and the radiation direction of the ions is deflected to the discharge electrode side having a reverse polarity. By the synergistic effect of the action of increasing the ion radiation distance toward the discharge electrode of the other-side static eliminator and the action of deflecting the ion radiation direction to the discharge electrode side having the opposite polarity in each static eliminator, Since the direction can be deflected in the direction of the intersection of two diagonal lines connecting the discharge electrode of one static eliminator and the discharge electrode of the same polarity in the other static eliminator, the object to be neutralized on the symmetry axis of the pair of static eliminators By eliminating the region where ions do not act, the entire area of the charge removal object can be discharged uniformly and efficiently regardless of the size and quantity of the charge removal object.

  In the present invention, it is desirable to attach the static eliminator to a resin molding machine. According to this, the molded product which is molded and charged by the resin molding machine can be discharged efficiently.

  Furthermore, in the present invention, it is preferable that the static eliminator is attached to a molded product take-out machine. Also by this, the molded product which is molded and charged by the resin molding machine can be discharged efficiently.

  In the present invention, the static eliminator may be attached to a molded product collection system for collecting a molded product released from the molded product take-out machine. According to this, the charged molded product released from the molded product take-out machine can be efficiently discharged in the process of recovery.

  According to the present invention, by the synergistic effect of the action of increasing the ion radiation distance toward the discharge electrode of the other-side static eliminator and the action of deflecting the ion radiation direction to the discharge electrode side having the opposite polarity in each static eliminator, Since the radiation direction of ions can be deflected in the direction of the intersection of two diagonal lines connecting the discharge electrode of one static eliminator and the discharge electrode of the same polarity in the other static eliminator, on the symmetry axis of the pair of static eliminators If the static elimination object is arranged, the region where ions do not act can be eliminated, and the entire area of the static elimination object can be uniformly and efficiently neutralized regardless of the size and quantity of the static elimination object. In addition, since the static elimination efficiency is improved, the number of static eliminators can be reduced, so that the initial cost and running cost are reduced, which is economically advantageous.

  FIG. 1 is a plan view showing a configuration in which a static eliminator according to the present invention is attached to a molded product recovery system. In this figure, the resin molding machine 1 is equipped with a traverse-type molded product take-out machine 1A. The molded product take-out machine 1A includes a transverse frame 4 extending in the width direction of the resin molding machine 1 mounted and fixed on a stationary platen 2 in the resin molding machine 1 via a spacer 3, and a drawing extending in the longitudinal direction of the resin molding machine 1. A frame 5 and a head lifting / lowering unit 7 provided with a molded product take-out head 6 that can be moved up and down and turned upside down are provided, and the base of the drawing frame 5 can freely move forward and backward in the width direction (arrow X direction) of the resin molding machine 1. 4, the head lifting unit 7 is assembled to the drawing frame 5 so as to freely advance and retreat in the longitudinal direction (arrow Y direction) of the resin molding machine 1, and the drawing frame 5 is attached to the resin molding machine 1. In order to advance and retreat in the width direction, a first drive source (not shown) made of, for example, an electric servo motor provided on the transverse frame 4 side and the head elevating unit 7 are made of resin components. In order to move up and down in the longitudinal direction of the machine 1, a second drive source (not shown) made of, for example, an electric servo motor provided on the drawing frame 5 side, and a head lifting unit In order to reverse the third drive source (not shown), for example, an electric servo motor or air cylinder device provided in 7 and the molded product take-out head 6 to the vertical molded product gripping posture and the horizontal molded product release posture. In addition, a fourth drive source (not shown) made of, for example, an electric servo motor is provided on the head lifting unit 7 side. In the figure, reference numeral 8 denotes a control means, and the resin molding machine 1 and the molded product take-out machine 1A are electrically connected to each other via the control means 8.

  The resin molding machine 1 includes a mold apparatus 10 including a fixed mold 2a mounted on a fixed platen 2 and a movable mold 9a mounted on a movable platen 9, and mold closing, mold clamping, and mold clamping of the mold apparatus 10. A mold-clamping mechanism (clamping apparatus) 11 that performs mold opening, and an injection mechanism (injection apparatus) that injects resin that is heated and melted when the mold apparatus 10 is clamped into the cavity space of the mold apparatus 10 at high pressure. 12, the control means 8 outputs control signals to the mold clamping mechanism 11 and the injection mechanism 12, and the operation of the resin molding machine 1 is controlled based on these control signals.

  On the other hand, the floor surface under the front end of the traversing frame 4 in the molded product take-out machine 1A, that is, in this embodiment, the front end of the traversing frame 4 extends to the operator's operation side. On the floor surface below the extended end of the operation side of the frame 4, a molded product recovery system 13 consisting of a conveyor device that is intermittently operated is installed in parallel with the resin molding machine 1, and a static eliminator 14 is attached above it. Yes.

  The static eliminator 14 is composed of a direct current type rod-shaped static eliminator, and a pair of rod-shaped static eliminators 14A and 14B are arranged to face each other, and a positive high voltage is applied to one end of the rod-shaped static eliminator 14A. The discharge electrode 14a is arranged, the discharge electrode 14b to which one high voltage is applied is arranged at the other end, and the other high voltage is applied to one end of the rod-shaped static eliminator 14B. Discharge electrode 14b is disposed, and discharge electrode 14a to which a high voltage of + is applied is disposed at the other end, so that discharge electrodes 14a and 14b having opposite polarities face each other on two parallel lines C1 and C2. In addition, a static eliminator 14 is provided in which a pair of rod-shaped static eliminators 14A and 14B are arranged to face each other. In FIG. 2, reference numeral 15 denotes a distributor. A positive high voltage is applied from the distributor 15 to the discharge electrode 14a via the high-voltage power supply line 16a, and to the discharge electrode 14b via the high-voltage power supply line 16b. A high voltage is applied.

  In the configuration described above, the receipt of the molded product 17 taken out from the resin molding machine 1 by the molded product take-out machine 1A of FIG. 1 in the molded product collection system 13 is shown in FIG. 2 when the molded product collection system 13 is stopped. This is done by positioning the molded product 17 on the axis of symmetry C3 of the pair of rod-shaped static eliminators 14A and 14B. In this state, when + ions 18 are emitted from the two discharge electrodes 14a and 14a and − ions 19 are emitted from the other two discharge electrodes 14b and 14b, discharges of opposite polarities facing each other on the two straight lines C1 and C2 The ions emitted from the electrodes 14a and 14b attract each other, and the radiation distance of + ions 18 from the discharge electrode 14a of one rod-shaped static eliminator 14A toward the discharge electrode 14b of the other rod-shaped static eliminator 14B and the other From the discharge electrode 14b of the rod-shaped static eliminator 14B toward the discharge electrode 14a of the one of the rod-shaped static eliminators 14A-the radiation distance of the ions 19 and the discharge electrode 14a of the other rod-shaped static eliminator 14B -The radiation distance of the ions 19 and the discharge current of one rod-shaped discharger 14A from the discharge electrode 14a of the other rod-shaped discharger 14B. Toward 14b + radial distance of ions 18 is increased.

  Further, + ions 18 radiated from the discharge electrode 14a of one rod-shaped static eliminator 14A and-ions 19 radiated from the discharge electrode 14b attract each other and are also radiated from the discharge electrode 14b of the other rod-shaped static eliminator 14B. -The ions 19 and the + ions 18 radiated from the discharge electrode 14a are also attracted to each other, and the radiation directions of the + ions 18 and-ions 19 of the rod-shaped static eliminators 14A and 14B are deflected to the discharge electrode side having the opposite polarity. To do. That is, in one rod-shaped static eliminator 14A, the radiation direction of + ions 18 is deflected toward the discharge electrode 14b, and the radiation direction of − ions 19 is deflected toward the discharge electrode 14a. Then, in the other rod-shaped static eliminator 14B, the radiation direction of the − ions 19 is deflected toward the discharge electrode 14a, and the radiation direction of the + ions 18 is deflected toward the discharge electrode 14b.

  As described above, the radiation distance of + ions 18 and − ions 19 from one rod-shaped static eliminator 14A toward the other rod-shaped static eliminator 14B increases, and from the other rod-shaped static eliminator 14B toward one rod-shaped static eliminator 14A. Due to the synergistic effect of the action of increasing the radiation distance of the + ions 18 and − ions 19 and the action of deflecting the radiation directions of the + ions 18 and − ions 19 to the discharge electrodes having opposite polarities in the rod-shaped static eliminators 14A and 14B. , + Ions 18 and − ions 19 in the radial direction, the first diagonal line C4 connecting the discharge electrode 14a of one rod-shaped static eliminator 14A and the discharge electrode 14a of the other rod-shaped static eliminator 14B and the discharge of one rod-shaped static eliminator 14A. Since it can be deflected in the direction of the intersection O of the second diagonal C5 connecting the electrode 14b and the discharge electrode 14a of the other rod-shaped static eliminator 14B, + ion 18 and -ion 19 Without a region that does not act, the whole area of the molded product 17 can be uniformly and neutralization efficiency. Moreover, since the number of installed static eliminators 14 can be reduced by improving the static elimination efficiency, the initial cost and running cost are reduced, which is economically advantageous.

  In the static eliminator 14 described in the above embodiment, one discharge electrode 14a to which a high voltage of + is applied and one high voltage are applied to each of the one bar-shaped static eliminator 14A and the other bar-shaped static eliminator 14B. Since one discharge electrode 14b is arranged, it is suitable for static elimination of one large molded product 17. On the other hand, as shown in FIG. 3, a plurality of discharge electrodes 14a to which a high positive voltage is applied and a plurality of discharge electrodes 14a to which a single high voltage is applied are applied to each of the one bar-shaped static eliminator 14A and the other bar-shaped static eliminator 14B. In the case of the static eliminator 14 having a structure in which the discharge electrodes 14b are alternately arranged and the discharge electrodes 14a and 14b having opposite polarities face each other between the pair of rod-shaped static eliminators 14A and 14B, Not only is it suitable for static elimination of a large molded product 17, but it can also be applied to static elimination of a plurality of small molded products 17 taken as a solid line. In other words, regardless of the size and quantity of the molded product 17, the entire area of the molded product 17 can be uniformly and efficiently discharged. In FIG. 3, the same parts as those in FIG.

  In the embodiment shown in FIG. 3, a plurality of discharge electrodes 14a to which a high positive voltage is applied and a plurality of discharges to which one high voltage is applied are applied to one of the rod-shaped static eliminators 14A and the other rod-shaped static eliminator 14B. The explanation is made with the static eliminator 14 having the structure in which the electrodes 14b are alternately arranged and the discharge electrodes 14a and 14b having the opposite polarities face each other between the pair of rod-shaped static eliminators 14A and 14B. The arrangement of the plurality of discharge electrodes 14a to be applied and the plurality of discharge electrodes 14b to which one high voltage is applied does not necessarily have to be alternated between the pair of rod-shaped static eliminators 14A and 14B. That is, if the discharge electrodes 14a and 14b having opposite polarities are opposed to each other between the pair of rod-shaped static eliminators 14A and 14B, as shown in FIG. The two discharge electrodes 14b to be applied are adjacent to each other, and the two discharge electrodes 14a to which a high positive voltage is applied are adjacent to each other, and a high positive voltage is applied to the other side of the rod-shaped static eliminator 14B. The two discharge electrodes 14b are adjacent to each other, and the two discharge electrodes 14a to which a high voltage of − is applied are adjacent to each other, and the same operations and effects as the embodiment shown in FIG. 3 can be achieved. . In FIG. 4, the same parts as those in FIG.

  In the above embodiment, as shown in FIG. 1, the static eliminator 14 is described as having a configuration provided on the upper part of the molded product collection system 13 that is constituted by a conveyor device and is intermittently operated. However, the static eliminator 14 is a resin molding machine. 1 may be attached. By attaching the static eliminator 14 to the resin molding machine 1, the entire area of the molded product 17 molded and charged by the resin molding machine 1 can be uniformly and efficiently neutralized immediately after the mold is opened.

  Further, the static eliminator 14 may be attached to the molded product take-out head 6 or the transverse frame 4 of the molded product take-out machine 1A. By attaching the static eliminator 14 to the molded product ejection head 6 or the traversing frame 4, the entire area of the molded product 17 taken out from the resin molding machine 1 by the molded product ejection head 6 and charged is supplied to the molded product collection system 13. Static electricity can be removed evenly and efficiently before delivery.

  In the embodiment described with reference to FIG. 1, the traverse type molded product take-out machine 1 </ b> A is mounted on the resin molding machine 1, but the swivel arm type (swivel type) molded product take-out machine is resin-molded. It may be mounted on the machine 1.

It is a top view which shows the structure which attached the static remover which concerns on this invention to the molded article collection | recovery system. It is explanatory drawing which shows one Embodiment of a static elimination device. It is explanatory drawing which shows other embodiment of a static elimination device. It is explanatory drawing which shows other embodiment of a static elimination device.

Explanation of symbols

1 Injection molding machine (resin molding machine)
1A Molded product take-out machine 13 Molded product collection system 14 Static eliminator 14A One rod-shaped static eliminator (one static eliminator)
14B The other rod-shaped static eliminator (the other static eliminator)
14a + discharge electrode 14b-discharge electrode 17 Molded product (object to be neutralized)
18 + ion 19-ion

Claims (4)

  In the static eliminator having a plurality of discharge electrodes, a pair of static eliminators in which + and − discharge electrodes are arranged are arranged so as to face each other so as to radiate + and − ions while being spaced apart from each other. A discharger characterized in that discharge electrodes of opposite polarities face each other between the dischargers. The static eliminator according to claim 1,
A static eliminator mounted on a resin molding machine. The static eliminator according to claim 1,
A static eliminator that is attached to a molded product take-out machine. The static eliminator according to claim 1,
A static eliminator attached to a molded product collection system for collecting a molded product released from a molded product take-out machine.

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