JP4280175B2 - Mold cleaning equipment - Google Patents

Description

  The present invention relates to a mold cleaning apparatus and an electrolytic cleaning liquid used for the mold cleaning apparatus, and in particular, can reliably remove deposits such as resin debris and gas burns adhering to a resin molding surface of a mold in a short time. The present invention relates to a mold cleaning apparatus that can be used and an electrolytic cleaning liquid used in the mold cleaning apparatus.

  Molds for synthetic resins cause resin debris and deposits such as burn marks due to gas to adhere to the inner surface as the amount of resin product is molded, and these deposits deteriorate the release of products to be molded later. As a result, inconveniences such as defective molding occur. Therefore, the molding die must be periodically removed and washed to remove the deposits.

  Conventionally, as a cleaning device for this type of mold, the present applicant has provided a cleaning device shown in FIGS. 21 and 22 in Japanese Patent Application Laid-Open No. 7-214570. This cleaning apparatus has an advantage that the mold can be cleaned efficiently in a short time by using both electrolytic cleaning and ultrasonic cleaning. In FIG. 21 and FIG. 22, 1 is a cleaning tank, 2 is a metal mold holding basket 3 that is detachably inserted into the cleaning tank, and is a plus side electrode suspended in the washing tank, which is on the minus pole side. An electric current is passed between the mold 5 held in the mold holding basket 2 and ultrasonic vibration is generated in the electrolytic cleaning liquid in the cleaning tank by the ultrasonic vibrator 4 attached to the bottom surface of the cleaning tank 1. The mold 5 is cleaned by using electrolytic cleaning and ultrasonic cleaning in combination.

JP-A-7-214570

  In the above-described mold cleaning apparatus, the cleaning power has a great advantage, but between the regular energization flow path connecting the negative mold 5 and the positive electrode 3 placed on the mold holding basket 2. In the electrolytic cleaning solution of the cleaning tank 1, it flows from the plus side to the minus side in a direction other than the regular energization flow path, and there is a possibility that the cleaning power of the portion to be cleaned of the mold 5 facing the plus side electrode may be reduced. .

Further, the gas (hydrogen gas or the like) generated by the electrolytic cleaning is likely to adhere to the positive electrode 3 suspended in the cleaning tank 1, and the gas present at the interface between the electrolytic cleaning solution and the electrode 3 impedes energization. There is a fear. Therefore, it is desired that the gas adhering to the surface of the electrode 3 is effectively separated from the electrode 3.
Furthermore, the cleaning liquid flows due to the gas generated at the time of cleaning, and the mold 5 mounted on the basket 2 is easy to move, the current conduction between the basket 2 and the mold 5 becomes unstable, and the power supply efficiency of electrolysis decreases. There was a problem.
In addition, when normal tap water is used as the electrolytic cleaning liquid used in the mold cleaning apparatus, the tap water contains trace amounts of calcium, magnesium, calcium, silica, and the like that cause rust. There is a problem that the components are deposited in the mold.
Further, conventionally, the electrolytic cleaning liquid used in the mold cleaning apparatus is used by mixing tap water (normal water) with an alkaline cleaning liquid or a neutral cleaning liquid. Impurities and ions such as magnesium, calcium, and silica gel are mixed in . When tap water is mixed, impurities are deposited on the surface of the mold, which is not cleaned, during electrolytic cleaning, leaving residue and causing rust. There is a problem.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a mold cleaning apparatus that solves the above-described problems and an electrolytic cleaning liquid used in the mold cleaning apparatus.

In order to solve the above-described problems, the present invention is a cleaning tank that stores an electrolytic cleaning solution, a metal holder that holds a mold of an object to be cleaned and is immersed in the cleaning tank, and is held by the holder There is an electrode that is suspended in the cleaning tank so as to face the mold, and the electrode and the holder are connected to the positive side and the negative side of a power source and energized through the electrolytic cleaning solution to It is configured to perform electrolytic cleaning, and
A vacuum port consisting of a small hole is drilled in the bottom wall of the holder , and when the vacuum port is connected to a vacuum pipe having a pump interposed therein for electrolytic cleaning, with inhaling the electrolyte cleaning liquid provides a mold cleaning apparatus according to claim Rukoto such is configured to adsorb the mold on the upper surface of the bottom wall portion of the retainer.

With the above configuration, by sucking the electrolytic cleaning liquid from the vacuum port through the vacuum pipe with the pump, the mold installed on the vacuum port can be adsorbed to the bottom surface of the holder. It can be placed in a stable state on the holder .

Furthermore, the present invention provides a cleaning tank that stores an electrolytic cleaning liquid, a metal holder that holds a mold of an object to be cleaned and is immersed in the cleaning tank, and the mold that is held by the holder. Electrodes are provided that are opposed to each other and suspended in the cleaning tank, and that the electrodes and the holder are connected to the positive side and the negative side of a power source and are energized through the electrolytic cleaning solution to perform electrolytic cleaning of the mold. With composition
The electrode is formed in a rod shape so as to be inserted into the concave portion of the mold placed on the holder with a gap in the mold surface, and the electrolytic cleaning liquid flow path and the electrolytic cleaning liquid in the flow path are provided. There is provided a mold cleaning apparatus comprising a jetting outlet.

When there is a deep and narrow recess in the mold, it is difficult to remove the resin residue attached to the inner surface of the recess. However, as described above, when a rod-shaped electrode is inserted into the recess, the resin residue attached to the inner surface of the recess Deposits can be removed efficiently.

By providing the flow path and the outlet, the electrolytic cleaning liquid is ejected from the through-hole of the electrode inserted into the concave portion of the mold, so that it adheres to the inner surface of the concave portion and exists at the interface between the mold and the electrolytic cleaning liquid. It becomes possible to remove gas or the like that inhibits electrolysis by a jet.

Further, the mold cleaning apparatus includes an insulating layer having a rib projecting on the outer peripheral surface of the electrode, and the rib prevents the electrode from coming into contact with the concave surface of the mold.
With the above configuration, even if the electrode and the concave surface of the mold are close to each other due to vibration or the like, the insulating rib can be in contact with the concave surface, so that the electrode does not directly contact the concave surface. .

According to the present invention, the cleaning efficiency can be improved.

The mold cleaning apparatus will be described with reference to FIGS.
The mold cleaning apparatus 10 in FIG. 1 uses both ultrasonic and electrolytic cleaning methods in combination, and uses a current direction regulating cover 20 to reliably secure deposits such as resin adhered to the mold 5 in a short time. To be removed.

As shown in FIGS. 1 and 5, the mold cleaning apparatus 10 has a cleaning tank 12 fixed to one side of the upper partition plate 11a of a frame 11 with a caster, and a power supply unit is connected to the other side 11c. In addition, a required drive device such as a controller and an electrolytic converter is mounted, and an ultrasonic generator 16 is mounted on the lower partition plate 11b, and an ultrasonic transducer connected to the ultrasonic generator 16 17 is installed in the cleaning tank 12, and the outer peripheral surface of the frame 11 is closed by the outer cover 18.
A purification tank 16 communicating with the washing tank 12 and a pump 14 connected to the purification tank 16 are disposed below the upper partition plate 11a, and the pipe 15 connected to the pump 14 is guided upward to perform washing. It is circulated to the tank 12.

  The cleaning tank 12 has a bowl shape with an upper surface opening, and a planar heater made of a silicon rubber heater is attached along substantially the entire outer peripheral surface of the cleaning tank 12, and the electrolytic cleaning liquid 26 is 60 according to the temperature detected by the temperature sensor in the cleaning tank 12. Heat to ℃.

Electrolytic cleaning liquid 26 is purified water sodium hydroxide (purified water were distilled tap water) or / and alkaline solution obtained by mixing sodium gluconate potassium hydroxide. The electrolytic cleaning liquid 26 is stored in the cleaning tank 12 up to a required level in accordance with the amount of the mold 5 that is the object to be cleaned. As shown in FIG. After being guided to a purification tank 13 equipped with a filter cloth and filtered, it is sucked up by a circulation pump 14 and circulated from the tip of the pipe 15 into the cleaning tank 12.

The cleaning tank 12 is made of stainless steel, and an insulating base 12b is attached to the upper surface of the outer peripheral flange portion surrounding the upper surface opening of the flange portion 12a. Inside the cleaning tank 12, a metal holder 19 provided with a current direction regulating cover 20 made of an insulating material is suspended while the bent portion 19c-1 of the support arm 19c is installed on the insulating base 12b, and cleaned. The holder 19 is prevented from contacting the inner surface 12 a of the tank 12.
As shown in FIG. 2, the metal holder 19 has four support arms 19c projecting upward from a cage-shaped portion composed of a bottom wall 19a and a low-side wall 19b, and the tip of the support arm 19c. The bent portion 19c-1 and the bottom wall 19a expose the metal, while other portions are coated with insulation. Incidentally, the bottom wall 19a but has an imperforate metal plate may be a perforated metal plate.

As shown in FIG. 3, the current direction regulating cover 20 is formed of a resin plate made of polypropylene or the like having a thickness of about 0.6 mm in a required shape, and the one-dot chain line portion and the dotted line portion in the figure are thin bent portions. The alternate long and short dash line part is assembled as a valley fold part, and the dotted line part is assembled as a mountain fold part and attached to the holder 19 as shown in FIG.
Specifically, the alternate long and short dash line portion in FIG. 3 of the current direction regulating cover 20 is valley-folded to raise the side wall portions 20b to 20e to form a bowl shape, and the long side wall portions 20d and 20e are folded at both ends. The insertion locking portions 20j to m-1 of the curved portions 20j to m are inserted into the slits 20b-2, 20b-3, 20c-2, and 20c-3 of the short side wall portions 20b and 20c and locked. .

Next, the holder 19 is housed inside the current direction regulating cover 20 in the above state, and the second side wall that is continuous with the upper ends of the long side wall portions 20d and 20e by folding the dotted line portion in FIG. The portions 20f and 20h are disposed on the inner surface side of the side wall portions 20d and 20e, and the third side wall portions 20g and 20i continuous to one side of the second side wall portions 20f and 20h are formed from the side wall portions 20b and 20c and the support arm 19c. The insertion locking portions 20f-1 and 20h-1 are inserted and locked in the slits 20g-1 and 20i-1, and the insertion locking portions 20b-1 and 20c-1 are slit 20g. -2 and 20i-2 are inserted and locked.
By assembling as described above, the current direction regulating cover 20 is attached to the holder 19 so that the periphery of the mold 5 placed on the bottom wall 19a of the holder 19 is surrounded as shown in FIG. It is attached.

The bent portion 19c-1 of the support arm 19c is installed on two opposing sides of the insulating base 12b, and a cathode mounting clamp 28 is attached to one bent portion 19c-1 to connect the cathode side terminal 26 on the operation panel. The cathode cord 24 is connected.
At the center of the washing tub 12, both ends of a current-carrying support rod 21 that is detachably mounted are positioned and fixed, mounting holes are provided at regular intervals in the length direction, and the lower end is bifurcated in two directions. The upper end of the shaft 22 is fixed to the mounting hole of the energizing support rod 21 so as to be vertically adjustable, and a disk-shaped electrode plate 23 is attached to the branched lower end of the branch shaft 22 to form an electrode 29. One end of the energization support bar 21 is connected to an anode side terminal 27 on the operation panel via an anode cord 25.

As shown in FIGS. 6 (A) and 6 (B), the electrode plate 23 is insulated on the surface except for the lower surface 23a which is a surface facing the mold 5 placed on the holder 19, but the anode cord One end of the conductive support bar 21 connected to 25 is exposed and electrically connected. In the electrode plate 23, eight through holes 23b for venting gas vertically penetrated at equal intervals in a circumferential shape. Further, the diameter of the electrode plate 23 is φ36 mm, and the diameter of the gas vent through hole 23 b is φ4 mm. The conductive support rod 21 and the branch axis 22 of the electrode 29 are formed of iron, titanium, stainless steel or the like, and the disc-shaped electrode plate 23 is iron, stainless steel, titanium or graphite (100% carbon sintered at 1500 ° C.) It is formed with.

The electrode plate 23 is connected to the plus side, and the holder 19 is connected to the minus side, so that the electrolysis cleaning is performed by energizing through the electrolytic cleaning solution 26.
Furthermore, ultrasonic vibration is generated in the electrolytic cleaning liquid 26 in the cleaning tank 12 by the ultrasonic vibrator 17 installed on the bottom surface of the cleaning tank 12 so that ultrasonic cleaning is performed at the same time. The ultrasonic vibration is oscillated at a single wave in the range of 24 KHz to 100 KHz or alternately at a frequency of, for example, 24 KHz and 30 KHz. Three types of frequencies may be oscillated in order.

  Next, the cleaning operation in the mold cleaning apparatus 10 will be described. First, the electrolytic cleaning liquid 30 is stored in the cleaning tank 12, and then the planar heater is turned on to heat the electrolytic cleaning liquid 30 in the cleaning tank 12. Heat to about 60 ° C. Thereafter, the mold 5 to be cleaned is mounted on the holder 19 to which the current direction regulating cover 20 is attached, and the bent portion 19c-1 of the support arm 19c is placed on the insulating base 12b of the cleaning tank 12.

  After the electrolytic cleaning liquid reached 60 ° C., the operation timer was operated to energize the holder 19 and the electrode 29 from the cathode side terminal 26 and the anode side terminal 27, and the electrolytic cleaning liquid 30 was held by the holder 22. The mold 5 is electrolytically cleaned. At this time, the voltage is adjusted to set a DC voltage output at 2 to 10 Amps per 1 dcm @ 2. At the same time, the vibrator is operated so as to alternately generate ultrasonic vibrations at 24 kHz and 30 kHz. When the work time set by the timer elapses, the energization is automatically stopped and the cleaning work is finished.

  According to the above-described cleaning, the ultrasonic cleaning method causes vibrations on the deposits such as the resin residue from the outside of the mold 5 to lift the deposits and permeate the electrolytic cleaning liquid 30 or destroy the deposits. The deposits are lifted from the mold 5 by a gas (hydrogen gas or the like) generated from the inside of the metal surface by an electrolytic cleaning method, and the deposits are peeled off from the mold 5 and removed. And in that case, since the electrolytic cleaning liquid 30 is heated to about 60 degreeC, the strong detergency is exhibited by softening a deposit.

With the above configuration, the mold 5 is simply mounted on the bottom wall 19a of the holder 19 provided with the current direction regulating cover 20 and the electrolytic cleaning is performed. since energization space normalized to be the upper side facing the electrode plate 23 is a left open, perform normal electrolytic cleaning intended energization between the electrodes 2 9 mold 5 through an electrolytic cleaning fluid 30 is secured be able to. On the other hand, the side surface of the mold 5 that does not face the electrode plate 23 is surrounded by a current direction regulating cover 20 made of an insulating material with a gap, so that unintentional energization from outside the normal energization space that hinders electrolytic cleaning is performed. Therefore, it is possible to improve the cleaning efficiency by performing electrolytic cleaning intensively.
In addition, since the current direction regulating cover 20 is separately attached to the holder 19, the conventional holder 19 can be effectively used without newly starting the holder.

  Further, even if a gas (hydrogen gas or the like) generated by electrolytic cleaning adheres to the lower surface 23a of the electrode plate 23, the electrode plate 23 is provided with a gas vent through hole 23b. The gas can be released upward through 23 b, and the gas present at the interface between the lower surface 23 a of the electrode 23 and the electrolytic cleaning liquid 30 can be prevented from interfering with energization.

Incidentally, electrolytic cleaning and are subjected to ultrasonic cleaning at the same time, may of course be an electrolyte washed only without combination ultrasonic cleaning.
Further, although the inner surface 12a of the washing Kiyoshiso 12 made of stainless steel, to the inner surface 12a of the cleaning tank 12 may be arranged an insulating material, the cleaning tank itself is also preferable to form an insulating material. Then, is prevented energized through the electrolytic cleaning fluid 30 to and from or between the mold 5 and the electrode 2 9 and the cleaning tank 12 and the cleaning tank 12, the electrolytic cleaning liquid between the electrodes 2 9 and the die 5 30 Direct energization through the air is promoted, enabling efficient electrolytic cleaning and contributing to shortening of the cleaning time. Moreover, the metal mold | die 5 which is a to-be-cleaned object is not limited to the metal mold | die for synthetic resin molding, All molds, such as rubber | gum, may be sufficient.

FIG. 7 shows a modification of the electrode plate.
The electrode plate 23 ′ of this modification has a conical shape in which a lower surface 23 a ′ that has not been subjected to insulation treatment has a center 23 c ′ protruding downward.
With the above configuration, since the lower surface 23a ′ of the electrode plate 23 ′ becomes an inclined surface, the gas attached to the lower surface 23a ′ moves outward along the conical inclined surface by buoyancy, and from the periphery of the electrode plate 23 ′. It is possible to promote leaving outside.

8 and 9 show that the current direction regulating cover 40 is previously integrally molded with a resin in a bowl shape .

As shown in FIG. 8, the current direction regulating cover 40 is integrally formed of FRP (glass fiber reinforced resin), and includes a bottom wall portion 40a and side wall portions 40b to 40e (peripheral wall portions). A notch 40f for flowing the pair of electrolytic cleaning liquids 30 is provided to face the corner of 40d and the corners of the side walls 40c and 40e.
In addition, a fixing mounting hole 40h is formed at a required position of the side wall portions 40b to 40e, and a drainage through hole 40g is formed at a required position of the bottom wall portion 40a.
Then, as shown in FIG. 9, a metal holder 19 is housed inside the current direction regulating cover 40, and is wound around the support arm 19c of the holder 19 by the tie band 41 through the mounting hole 40h or the notch 40f. Fix it.

With the above configuration, the current flowing in the electrolytic cleaning liquid 30 of the cleaning tank 12 in a free direction and the current that impedes the electrolytic cleaning is reduced from the side, and intensive electrolytic cleaning is possible and the electrolytic efficiency is improved. In addition, since the notches 40f are provided in the side wall portions 40d to 40e, the electrolytic cleaning solution 30 is circulated inside and outside the current direction regulating cover 40, and the uniformization is promoted. Further, since the through hole 40g is provided in the bottom wall portion 40a of the current direction regulating cover 40, when the current direction regulating cover 40 is pulled up from the cleaning tank 12 together with the holder 19, the electrolytic cleaning liquid 30 inside the cover 40 is removed. It becomes possible to discharge from the through hole 40g.
The material of the current direction regulating cover 40 is not limited to a resin such as FRP as long as it is an insulating material, and also includes a metal having an oxide film (for example, titanium), a metal having an insulating film, and a metal having an oxide film. It is also possible to apply an insulating coating to the surface.
Other configurations are the same as those in the example of FIGS.

FIG. 10 shows that five resin plates are assembled to form a saddle-shaped current direction regulating cover 40 ′ .

The current direction regulating cover 40 ′ is composed of one resin plate constituting the bottom wall 40a ′ and four resin plates constituting the side walls 40b ′ to 40e ′, and mounting holes for assembling the resin plates to each other. 40e-1 ′ to 3 ′ are drilled at required locations.
Then, as shown in FIG. 10 (A), the side walls 40b 'to 40e' and the bottom wall 40a 'are fastened to each other by passing the tie band 41 through the mounting holes 40e-1' to 3 'and adjacent side walls. The tie band 41 is passed through the mounting holes 40e-1 'to 3' and fastened together by 40b 'to 40e' to assemble the saddle-shaped current direction regulating cover 40 '.
As shown in FIG. 10B, the holding tool 19 is housed in the current direction regulating cover 40 ′, and the support arm 19c of the holding tool 19 is secured by the tie band 41 through the mounting hole 40h ′ or the notch 40f ′. Wrap and fix to.
Needless to say, the material of the current direction regulating cover 40 ′ is not limited to the resin plate as long as it is an insulating material.
Other configurations are the same as those in the example of FIGS.

FIG. 11 shows that the current direction regulating cover 42 has a frame shape without a bottom surface and is fixedly attached to the bottom wall 19a and the side wall 19b of the holder 19 .
That is, a substantially C-shaped locking part 42b is provided inside the lower end of the side wall part 42a of the current direction regulating cover 42, and the locking part 42b is externally engaged and locked to the peripheral edge of the bottom wall 19a of the holder 19 and the side wall 19b. Attached.
In addition, what is necessary is just to latch and attach to the periphery of the low wall 19a, when using the thing of the shape of only the bottom wall 19a without the side wall 19b as the holder 19.
Other configurations are the same as those in the example of FIGS.

FIG. 12 shows that a support arm 52 c is provided on the current direction regulating cover 52 without providing a support arm on the holder 50 .

A metal holder 50 on which a mold is mounted includes a bottom wall 50a and a low-side wall 50b. A current-carrying bar 51 is erected from the center of the bottom wall 50a, and a cathode cord 24 is connected to the current-carrying bar 51. It has become a cathode.
The current direction regulating cover 52 is formed by integrally molding a bottom wall portion 52a, a peripheral wall portion 52b, and an inverted L-shaped support arm 52c protruding upward from a required position of the peripheral wall portion 52b with a resin such as FRP. Yes.

Then, the bent portion 52 c-1 at the upper end of the support arm 52 c of the cover 52 is placed on the insulating base 12 b of the cleaning tank 12 in a state where the holder 50 is housed in the current direction regulating cover 52. Thus, the current direction regulating cover 52 and the holder 50 are suspended in the cleaning tank 12.
The material of the current direction regulating cover 52 is not limited to a resin such as FRP as long as it is an insulating material, and may be a metal having an oxide film (for example, titanium) or a metal having an insulating film. It is more preferable to use a metal having low conductivity for the metal having an oxide film or an insulating film. Other configurations are the same as those in the example of FIGS.

FIG. 13 shows that the holder 55 is a metal holder 19 in which a frame-shaped current direction regulating cover 56 is resin-molded .
The above configuration is preferable because it is not necessary for the user to assemble and attach the current direction regulating cover by retrofitting.
Other configurations are the same as those in the example of FIGS.

In Figure 14, and the outer cylindrical current direction restricting cover 60 laterally spaced electrodeposition electrode plate 23 and the space.
Specifically, the current direction regulating cover 60 includes a cylindrical portion 61 made of a resin pipe and a plurality of attachment members 62, and the cylindrical portion 61 is disposed on the branch shaft 22 above the electrode plate 23 via the plurality of attachment members 62. One end 62b of the attachment member 62 is fixed to the upper end of the cylindrical portion 61, and the other end 62a is fixed to the branch shaft 22.

With the above configuration, since the electrode plate 23 is surrounded by the current direction regulating cover 60 and the side facing the mold 5 is opened, the direction of the current flowing through the electrolytic cleaning solution 30 is regulated, and the mold 5 is correctly configured. Can be led to energize.
Further, since a space S having a distance W (about 2 to 8 mm) is opened between the electrode plate 23 and the cylindrical portion 61, the gas generated during the electrolytic cleaning is passed through the space S and the gap between the mounting members 62. Can be removed.
Incidentally, electric distance L1 from the height of to the lower end of the current direction restricting cover 60 of plate 23, and the distance from the height of the electrode plate 23 to the mold 5 and L2, L1 = 2~20mm, L2 = 30mm It is said.
Other configurations are the same as those in the example of FIGS.

FIG. 15 shows that the current direction regulating cover 60 ′, which is externally provided with a space around the electrode plate 23, is conical instead of cylindrical .

The conical cylinder portion 61 ′ is made of resin and has a shape that expands toward the lower side where the mold 5 is disposed, and an extension line (dotted line in FIG. 15) downward from the inner peripheral surface of the conical cylinder portion 61 ′. It is preferable to arrange so as to intersect P on the mold 5. (Alternatively, the extension line may be wrapped on the mold 5.) Since the other configuration is the same as the example of FIG.

FIGS. 16A and 16B show that a weight 70 is placed on the mold 5 placed on the holder 19 that is immersed below the electrode plate 23 .

The mold 5 is mounted on the bottom wall 19 a of the holder 19, and a metal weight 70 coated with an insulating coating is placed on a part other than the cleaning part 5 a of the mold 5 to place the mold 5. The weight 70 may not be a metal as long as it has a weight.
With the above configuration, since the mold 5 is fixed from the weight 70, the mold 5 does not move even if vibration or the like occurs, and the contact between the holder 19 to which current is supplied and the mold 5 is maintained. Energization is stable and the power supply efficiency of electrolysis can be improved.
In FIG. 16, the current direction regulating cover 20 is not shown for ease of viewing. Other configurations are the same as those in the example of FIGS.

FIG. 17 shows that a spacer 71 is interposed between the mold 5 placed on the holder 19 and the side wall 19 b of the holder 19 .
With the above configuration, since the mold 5 is fixed by the spacer 71, the mold 5 does not move even if vibration or the like occurs, and the current supply between the holder to which the current is supplied and the mold is stable. In addition, the power supply efficiency of electrolysis can be improved.
In FIG. 17, the current direction regulating cover 20 is not shown for ease of viewing. Other configurations are the same as those in the example of FIGS.

18A and 18B show a point that the mold 5 is fixedly held by a mold pressing jig 73 having an opening / closing lid 78, and the mold pressing jig 73 is fitted and accommodated in the holding tool 19. FIG .

The mold holding jig 73 includes a bottom wall portion 74 made of a conductive material having a drain hole 74a, a multi-stage hinge 77 provided on one side of the bottom wall portion 74, and a hinge 77 that can be adjusted in height and rotatable. An opening / closing lid 78 made of a heat-resistant / chemical-resistant resin and attached to the mold 5 of the opening / closing lid 78 via a mounting arm 78b. And a lock portion 76 that is provided on the other side of the bottom wall portion 74 and engages the tip end portion 78c of the opening / closing lid 78, and a handle 75 that is provided at a required position of the bottom wall portion 74. Incidentally, the conductive material forming the bottom wall portion 74 has a stainless steel.
The opening / closing lid 78 is provided with an opening 78 a at a position corresponding to the cleaning portion 5 a of the mold 5, the upper surface of the mold 5 is pressed by the mounting portion 79 of the opening / closing lid 78, and the tip 78 c of the opening / closing lid 78 is locked to the lock portion 76. In a locked state, the holder 75 is held and the mold pressing jig 73 is placed on the holder 19.

With the above configuration, since the mold 5 is fixed by the mold pressing jig 73, the mold 5 does not move even if vibration or the like occurs, and the holder 19 and the mold to which current is supplied are provided. The energization to the mold 5 is stabilized through the bottom wall 74 made of stainless steel of the pressing jig 73, and the power supply efficiency of electrolysis can be improved.
In FIG. 18, the current direction regulating cover 20 is not shown for easy viewing. Other configurations are the same as those in the example of FIGS.

In the embodiment in FIG. 19, the holder 80 includes a metal bottom wall portion 81, a plurality of vacuum ports 81 a composed of small holes drilled in the bottom wall portion 81, and a vacuum chamber 81 b in which each vacuum port 81 a communicates. A suction hole 81c formed in the bottom surface of the vacuum chamber 81b, and an inverted L-shaped support arm 82 that protrudes upward from the bottom wall portion 81 and has a bent portion 82a at the tip.
The holder 80 is suspended by installing the bent portion 82a of the support arm 82 on the insulating base 12b of the cleaning tank 12, and is connected to the vacuum pipe 83 via the rubber packing 84 below the suction hole 81c. The vacuum pipe 83 is bifurcated, and a pump 86 is interposed on one side and circulated to the cleaning tank 12, and the other is provided with an adjustment valve 85 to return to the cleaning tank 12.

With the above configuration, the mold 5 installed on the vacuum port 81a is attached to the bottom wall of the holder 80 by sucking the electrolytic cleaning solution 30 from each vacuum port 81a through the vacuum pipe 83 and the vacuum chamber 81b with the pump 86. The mold 5 does not move even if vibration or the like is generated, and the energization between the holder 19 to which the current is supplied and the mold 5 is stabilized, and the power supply for electrolysis Efficiency can be improved.
Other configurations are the same as those in the example of FIGS.

In the embodiment according to FIG. 20 (A) (B), as the rod-like the electrodes 93, with which plug open voids in the 'recess 5a of' placed on the holder 19 the mold 5, the electrode 93 The electrolytic cleaning liquid 30 is ejected from the ejection port 96a of the lower end portion 93a.

A cleaning tank 13 is connected to the opening on the bottom surface of the cleaning tank 12, and a pump 14 connected to the cleaning tank 13 is connected to a vertical pipe 91 and a horizontal pipe 92, and a plurality of rod-shaped electrodes 93 are suspended from the horizontal pipe 92. Has been established.
The electrode 93 is connected to the anode side terminal 27 by fitting the anode mounting clamp 98 on the upper end side, and includes a lower end portion 93a having a diameter expanded on the lower end side, and a rib and a required position on the outer peripheral surface of the electrode 93. An insulating ring 95 is externally fitted. Further, a through hole 96 communicating with the hollow portion of the horizontal tube 92 is provided inside the electrode 93, and serves as a flow path for the electrolytic cleaning solution 30.

  With the above configuration, deposits such as resin residue attached to the recess 5a ′ of the mold 5 ′ can be intensively electrolyzed, and the lower end of the electrode 93 inserted into the recess 5a ′ of the mold 5 ′. By ejecting the electrolytic cleaning liquid 30 from the jet port 96a of the portion 94, it becomes possible to remove bubbles or the like adhering to the inner surface of the concave portion 5a ′ by jetting, and the interface between the concave portion 5a ′ of the mold 5 ′ and the electrolytic cleaning liquid 30. It is possible to prevent bubbles from inhibiting electrolysis.

Further, even if the electrode 93 and the inner surface of the recess 5a ′ of the mold 5 ′ are close to each other due to vibration or the like, the insulating ring 95 is in contact with the recess 5a ′ and the electrode 93 is not in contact with the surface of the recess 5a ′. Therefore, electrolysis can be stabilized.
Other configurations are the same as those in the example of FIGS.

It is a perspective view of a metal mold cleaning device. It is a perspective view of a holder. It is an expanded view of the cover for electric current direction regulation. It is a perspective view of the holder which attached the current direction regulation cover. It is a partially broken front view of a mold cleaning device. (A) is a side view of a conductive plate, (B) is a bottom view. It is a side view of the electrode plate of a modification. It is a perspective view of the current direction regulating cover. It is a perspective view of the holder which attached the current direction regulation cover. (A) is a side view of the current direction regulating cover, and (B) is a side view showing a state in which a holder is attached. It is a cross-sectional view of the holder fitted with a current direction controlling cover. Hold equipment and is an exploded perspective view of the current direction regulating cover. It is a perspective view of a hold member. It is principal part sectional drawing of a metal mold | die washing apparatus . It is a schematic sectional drawing of a metal mold | die washing apparatus . (A) is a side view of a holder , and (B) is a top view thereof . It is sectional drawing of a holder . (A) is a side view of a holder , and (B) is a top view thereof . It is a side view of a metal mold washing device . (A) is a side view of a mold cleaning apparatus , and (B) is an enlarged view of a main part thereof. It is a perspective view of a prior art example. It is principal part sectional drawing of the said prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Mold 10 Mold washing | cleaning apparatus 11 Frame 12 Cleaning tank 16 Ultrasonic generator 17 Ultrasonic vibrator 19 Holder 20, 40, 42, 52, 56 Current direction control cover 21 Conductive support rod 22 Branch shaft 23 Electrode plate 23b Degassing through hole 24 Cathode cord 25 Anode cord 29 Electrode 30 Electrolytic cleaning liquid 60 Current direction regulating cover 70 Weight 71 Spacer 73 Mold holding jig 78 Opening / closing lid 81a Vacuum port 81b Vacuum chamber 83 Vacuum pipe 93 Electrode 95 Insulating ring ( rib)

Claims (3)

A cleaning tank for storing the electrolytic cleaning liquid, a metal holder for holding the mold of the object to be cleaned and immersed in the cleaning tank, and the inside of the cleaning tank facing the mold held by the holder The electrode and the holder are connected to the positive side and the negative side of the power source, and the electrolytic cleaning of the mold is performed by energizing through the electrolytic cleaning solution, and
A vacuum port consisting of a small hole is drilled in the bottom wall of the holder , and when the vacuum port is connected to a vacuum pipe having a pump interposed therein for electrolytic cleaning, mold cleaning apparatus according to claim Rukoto such is configured to adsorb the mold on the upper surface of the bottom wall portion of the retainer with inhale electrolytic cleaning liquid. A cleaning tank for storing the electrolytic cleaning liquid, a metal holder for holding the mold of the object to be cleaned and immersed in the cleaning tank, and the inside of the cleaning tank facing the mold held by the holder The electrode and the holder are connected to the positive side and the negative side of the power source, and the electrolytic cleaning of the mold is performed by energizing through the electrolytic cleaning solution, and
The electrode is formed in a rod shape so as to be inserted into the concave portion of the mold placed on the holder with a gap in the mold surface, and the electrolytic cleaning liquid flow path and the electrolytic cleaning liquid in the flow path are provided. A mold cleaning apparatus comprising a jetting outlet . The mold cleaning apparatus according to claim 2, further comprising an insulating layer provided with a rib projecting on an outer peripheral surface of the electrode so that the electrode does not contact the concave surface of the mold by the rib .

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