JP3227391B2 - Cleaning equipment for synthetic resin molds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a mold for a synthetic resin, and more specifically to a method for reliably removing a resin residue or a gas burn on a resin molding surface of a mold in a short time. To make it possible.

[0002]

2. Description of the Related Art In a synthetic resin mold, resin deposits and deposits such as burn marks due to gas adhere to the inner surface of the mold as the resin product is molded. Such deposits cause inconveniences such as poor mold release of a product to be molded later, leading to molding failure. Therefore, the synthetic resin mold must be periodically removed and washed to remove the deposits.

Heretofore, in this type of cleaning work, a mold component disassembled into a mold is immersed in kerosene for half a day, and then brushed by an operator. However, this polishing operation is very troublesome because the mold is expensive and must be carefully done so as not to damage it. In addition, it takes about 15 minutes to polish one mold component, so that there is a problem that workability is poor.

[0004] On the other hand, conventionally, an electrode plate connected to an anode (+) and a mold connected to an anode (-) are immersed in a cleaning tank containing an electrolytic cleaning solution, and the above-mentioned electrolytic solution is immersed. By energizing through the cleaning liquid, a bubble-like electrolytic gas is generated from the inside of the electrode plate and the mold, and while the electrolytic cleaning liquid is being stirred by the electrolytic gas, the adhered substance is lifted up from the mold to form the mold. There is an electrolytic cleaning method for performing cleaning.

[0005]

However, in the above-described electrolytic cleaning method, it is possible to reliably remove the deposits unless the location of the mold to be cleaned is a position that is linearly opposed to the electrode plate. Can not. For example, depth 3mm,
In the case of a concave groove having a width of 2 mm, the bottom surface of the groove, that is, a shaded portion cannot be cleaned. Further, the deposits hinder the current to be supplied, so that an electrolytic gas is not easily generated. Therefore, the work time is delayed. In addition, when the work time is too long, alkali burning occurs on the surface of the mold. Occurs. Further, the efficiency of stirring the electrolytic cleaning solution due to generation of decomposition gas is poor, and the removed deposits may adhere to the mold again.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a synthetic resin mold cleaning apparatus which can surely remove deposits attached to a synthetic resin mold in a short time. The purpose is.

[0007]

In order to achieve the above object, the present invention provides a chemical solution tank containing an electrolytic cleaning solution and a bottom surface of the chemical solution tank, which generates ultrasonic vibrations in the electrolytic cleaning solution in the chemical solution tank. A vibrator to be cleaned and an object to be cleaned made of a resin molding die are housed therein, and the object to be cleaned is mounted together with the object to be cleaned so as not to come into contact with the bottom surface in the chemical solution tank, and to be dipped in the electrolytic cleaning solution. A basket having a mesh stretched over a frame having the same; and an electrode suspended and immersed above an object to be cleaned contained in the basket in the electrolytic cleaning solution in the chemical solution tank. ), And a cathode (-) is supplied to the object to be cleaned through the basket to generate hydrogen gas. And, as the electrolytic cleaning solution, sodium hydroxide, EDTA, sodium gluconate, and an ammonia compound are used. Including It provides a synthetic resin mold of a washing apparatus, characterized in that with.

In the cleaning apparatus of the present invention, a discharge pipe for discharging the electrolytic cleaning liquid by piping in the chemical solution tank, a circulating pump for absorbing the discharged electrolytic cleaning liquid continuously with the discharge pipe, and a circulating pump And a supply pipe connected to the pump for discharge and discharging the electrolytic cleaning liquid discharged from the circulation pump so that the electrolytic cleaning liquid in the chemical tank is convected. Further, it is preferable that a purification tank provided with a filter cloth is interposed between the discharge pipe and the circulation pump, the discharged electrolytic cleaning liquid is washed, and supplied to the chemical solution tank by the circulation pump. .

Specifically, the cleaning apparatus of the present invention includes, for example, a chemical solution tank containing an electrolytic cleaning solution, a vibrator disposed outside the bottom surface of the chemical solution tank and vibrating the electrolytic cleaning solution, and an inner portion of the frame. The object to be cleaned is accommodated, and the object to be cleaned is detachably attached to the chemical solution tank together with the object to be cleaned via a holding rod protruding from the frame, and is immersed in the electrolytic cleaning solution, and the cathode (−)
A holder made of a mesh-shaped basket having conductivity connected to the anode, a shaft connected to the anode (+) and having an end extending to the center of the chemical solution tank, and an end of the shaft. A lower end that bends downward has a bent portion immersed in the electrolytic cleaning solution, and is provided with a conductive swinging shaft that swings in the circumferential direction of the shaft portion by a driving unit, and is connected to a tip of the bent portion. A rod-shaped electrode parallel to the shaft, a discharge pipe for connecting one end to the level of the electrolytic cleaning liquid in the chemical tank and discharging the electrolytic cleaning liquid in the chemical tank, and connecting the other end of the discharge pipe. A purifying tank for cleaning the discharged electrolytic cleaning liquid by a filter cloth provided therein, a purifying tank connected to the purifying tank, a circulation pump for absorbing the cleaned electrolytic cleaning liquid, and one end connected to a discharge port of the circulating pump. At the same time, pipe the other end vertically to the corner of the chemical solution tank and A supply pipe that discharges the washed electrolytic cleaning liquid discharged from the pump so that the electrolytic cleaning liquid in the chemical solution tank is convected, and removes extraneous matter from the outside of the cleaning target by ultrasonic waves from the vibrator, The electrode and the object to be cleaned are energized through the rocking shaft and the basket to electrolyze and float the deposits with hydrogen gas generated from the inside. The circulation pump is used to wash and circulate the electrolytic cleaning solution while cleaning. Contaminants in the tank are convected to remove the floating substances.

According to the present invention, when a resin residue is removed from a mold by a cleaning device using both an electrolytic method and an ultrasonic method, sodium hydroxide, EDTA,
Since an alkaline solution containing sodium gluconate is used, the cleaning power against resin residue is strong, and in addition to the physical cleaning using the electrolytic method and the ultrasonic method, the chemical cleaning power is enhanced. The resin residue can be efficiently removed in a short time with a relatively strong cleaning power.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. FIG. 1 shows a cleaning apparatus for a synthetic resin mold according to the present invention. The cleaning apparatus employs both an ultrasonic cleaning method and an electrolytic cleaning method to apply a resin or the like adhered to a cleaning object 10 such as a mold. The kimono 11 is reliably removed in a short time.

The cleaning device includes a moving roller 13 at a lower end, and a base 15 divided into three stages by a partition plate 14.
A chemical solution tank 21 containing an electrolytic cleaning liquid 26 in which a basket 20 formed of a holder for holding the object to be cleaned 10 (shown in FIG. 3) is removably mounted, a power supply 22, and a purification tank 23 And a circulation pump 24, respectively, and an electrolysis converter 25 is installed beside the base 15. The substrate 15 is assembled by welding a substrate 15a bent in an L-shape.

As the electrolytic cleaning solution 26, 45 g of sodium hydroxide, 50 g of EDTA (ethylene, diamine, tetra, acetic acid) and sodium gluconate 2 per liter of water are used.
An alkaline solution obtained by mixing 0 g and 100 g of an ammonium compound is preferably used. Note that the ammonia compound need not always be added.

The basket 20 is formed of a conductive material such as stainless steel, and as shown in FIG. 2, a rectangular frame 20a (3 mm in diameter) smaller than the chemical tank 21 is provided. 2mm mesh net 20b on the whole surface except the part
Is stretched out. Also, at the four corners at the upper end of the frame 20a,
The holding rods 20c are provided so as to extend upward, and the upper portions of the holding rods 20c are bent outward in the width direction to provide positioning portions 20d. The cage 20 is set such that the lower end surface thereof does not come into contact with the bottom surface 21 a of the chemical solution tank 21 in a state of being mounted in the chemical solution tank 21.

The chemical solution tank 21 is made of stainless steel, as shown in FIG.
And an upper surface 21b opened in a rectangular shape as shown in FIG.
The outer peripheral wall 21c is provided so as to extend below the edges of the outer peripheral wall 21c. A separate U-shaped insulating material 27 made of an insulating material such as a resin is externally extended on the long side of the upper end on both sides thereof, and the positioning member 2 is extended.
A groove 27a is provided at a position facing 0d. Chemical tank 21
Preferably has an internal capacity of about 6 l to 20 l.

As shown in FIG. 6A, a vibrator 28 for transmitting ultrasonic waves by connecting to the power supply 22 is provided on the outside of the bottom surface 21a of the chemical solution tank 21 for performing ultrasonic cleaning. Two are installed at a required interval in the longitudinal direction. Vibrator 2
Numeral 8 is disposed at the center of the chemical solution tank 21 in the width direction, and a resonance preventing material 29 is provided at an intermediate portion between them. Since the ultrasonic waves generated from the vibrator 28 have a straight traveling property,
As shown in FIG. 6B, a plurality of (five in the figure) may be installed at required positions on the bottom surface 21a of the chemical solution tank 21. Also,
When the ultrasonic waves resonate, it is preferable to install the resonance preventing member 29 between the transducers 28.

A rod-shaped electrode 30 having a rectangular cross section and swinging in the longitudinal direction of the chemical solution tank 21 through a driving means is provided at the center of the chemical solution tank 21 so as to be insertable into and removable from the electrolytic cleaning liquid 26. ing. The above-mentioned electrolysis converter 2 described later is connected to the electrode 30.
5 is connected to the anode (+) side of the direct current supplied through the battery 5, and the cathode (-) side is connected to the cage 20. The current is passed through the electrolytic cleaning solution 26 to perform electrolytic cleaning. ing. The electrode 30 is made of graphite (100% carbon sintered at 1500 ° C.).

As shown in FIG. 4 and FIG.
In the swing mechanism 0, the bearing portion 32 is screwed and fixed to the upper substrate 15a horizontally arranged on the base 15. A rotating shaft 33 rotated by a driving means is attached to the bearing portion 32 so as to be rotatable in a circumferential direction. The rotating shaft 3
A pivot shaft 34 having an inverted L-shape in a side view is pivotally attached to the tip of the pivot shaft 3 in a vertically rotatable manner.
0 is continuous.

The bearing portion 32 is formed of iron or stainless steel or the like, and has a cylindrical portion 32a in which the rotary shaft 33 is fitted.
A fixed plate portion 32b is provided at one end of the fixed plate portion 3b.
A screw hole 32c is formed in 2b and attached to the substrate 15a so as to correspond to the longitudinal center of the chemical solution tank 21.
The bearing portion 32 is attached to the substrate 15a with a bake plate (not shown) made of phenolic resin having an insulating property interposed therebetween. The rotating shaft 33 is also made of iron or stainless steel, and is provided with a locking plate 33a protruding downward. The driving means is connected to the locking plate 33a to swing in the circumferential direction. Similarly to the above, a bake plate is disposed on both sides or a phenol resin is applied to the locking plate 33a to perform insulation treatment. At the end of the rotating shaft 33, a vertical groove is provided, and a hole penetrating in the horizontal direction is provided.

The oscillating shaft 34 is made of a conductive material such as stainless steel, and has a projection at one end of a shaft portion 34a for engaging with the concave groove. I'm wearing The other end of the shaft portion 34a extends to the center of the chemical solution tank 21, and a substantially central portion thereof corresponds to the groove 27b formed in the insulating material 27 to maintain a stable state. It swings in the circumferential direction together with the rotation shaft 33. At the tip of the shaft portion 34a, two bent portions 34b that are bent and extend downward are formed in a V-shape that spreads downward. As shown in FIG.
The extension length of 4b is set so that the lower end is immersed in the electrolytic cleaning solution 26, and the lower end of the electrode 3b is
0 are provided in parallel with the shaft portion 34a.

The driving means includes an electromagnetic solenoid 3
5, the electromagnetic solenoid 35 is connected to the substrate 15
Screws are fixed to a. The electromagnetic solenoid 35 is
The drive cylinder 35a and the locking plate 33a of the rotary shaft 33 are connected by a spring 36. Also, the electromagnetic solenoid 3
A rectangular mounting plate 15b is welded to a required position of the substrate 15a located on the side opposite to the side 5. A screw 37 having an annular mounting hole at the tip is screwed to the mounting plate 15b, and the screw 37 and the locking plate 33a are connected to the electromagnetic solenoid 3 by a screw.
5, and is connected by a spring 36.

Therefore, by rotating the swing shaft 34 about the mounting portion of the swing shaft 34 and the rotating shaft 33 as a fulcrum, the electrode 30 is not obstructed at the time of inserting and removing the basket 20. At the same time, the continuous electrode 30 can be immersed in the electrolytic cleaning liquid 26 during the electrolytic operation.

When the electromagnetic solenoid 35 is driven, the spring 36 pulls or presses the locking plate 33a to rotate the rotating shaft 33 in the circumferential direction. As shown in FIG. 3, the electrode 30 continuous through the intermediary is swung in the longitudinal direction of the chemical solution tank 21. In addition, the electrolytic cleaning liquid 26 is set to be stirred by the swing of the electrode 30. This electrode 3
The swing of 0 can be finely adjusted by adjusting the tension of the spring 36 by tightening the screw 37.

The cleaning device cleans the electrolytic cleaning liquid 26 with the nonwoven fabric 40 provided as a filter cloth in the purification tank 23 and discharges the electrolytic cleaning liquid 26 into the chemical liquid tank 21 by the circulation pump 24.
The convection of the electrolytic cleaning solution 26 in the chemical solution tank 21 and
The excess electrolytic cleaning liquid 26 that overflows is discharged to the purification tank 23 to circulate the electrolytic cleaning liquid 26.

That is, as shown in FIG. 3 and FIG. 7, the purification tank 23 and the circulation pump
The suction port 4 is connected by a supply pipe 41, and the discharge port of the circulation pump 24 and the chemical solution tank 21 are connected by a supply pipe 42 bent to a required shape corresponding to the base 15. The supply pipe 42 is branched in two directions via a connecting pipe 42a at a position located on the upper stage, and supply pipes 42-1 and 42-2 are provided at diagonal corners at both ends in the longitudinal direction of the chemical solution tank 21. Piping.

The supply pipes 42-1 and 42-2 extend vertically from the upper end face to the vicinity of the bottom face 21a at the corner of the chemical solution tank 21, and the lower end is closed by the cap part 42b and adjacent to the lower end. A plurality of discharge holes 42c are formed at a required interval in the longitudinal direction (vertical direction) on the side of the corner in the width direction. The supply pipes 42-1 and 42-2 are provided so as not to come into contact with the basket 20 housed in the chemical solution tank 21. Further, in the chemical solution tank 21, a discharge pipe 43 is provided at a liquid level position in which a required amount of the electrolytic cleaning solution 26 is contained.
And the discharge pipe 43 is connected to the lower purification tank 23.

Therefore, as shown in FIG. 7, when the circulation pump 24 is driven, the electrolytic cleaning liquid 26 is absorbed from the purification tank 23 through the supply pipe 41, and the electrolytic cleaning liquid 26 is supplied from the circulation pump 24 to the supply pipe 42. , 42-1 and 42-2 into the chemical solution tank 21. In the chemical solution tank 21, the electrolytic cleaning liquid 26 is discharged in the same circumferential direction through the discharge holes 42a of the supply pipes 42-1 and 42-2, and is convected. The convection of the electrolytic cleaning liquid 26 has a uniform flow rate between the upper and lower sides of the chemical solution tank 21 by the discharge hole 42a. The electrolytic cleaning liquid 26 overflowing by this supply is discharged to the purification tank 23 through the discharge pipe 43,
At 0, the deposit 11 mixed in the electrolytic cleaning liquid 26 is removed, and the cleaned electrolytic cleaning liquid 26 is supplied into the chemical solution tank 21 again.

The electrolytic cleaning liquid 2 by the circulation pump 24
When the discharge amount of the cleaning liquid 6 is small, the convection and the stirring effect of the electrolytic cleaning liquid 26 are reduced, and the removal efficiency is deteriorated. It is set in accordance with the size of the object 10 and the capacity of the chemical solution tank 21, and is set to about 5.5 to 31 l / min.

Although the supply pipe 42 is branched in two directions and disposed in the chemical solution tank 21, the electrolytic cleaning solution 26 may be convected by piping only at one corner of the chemical solution tank 21. I can do it. On the other hand, it goes without saying that the convection and stirring effects of the electrolytic cleaning liquid 26 can be more efficiently obtained when a plurality of supply pipes 42 are provided.

Further, a waste liquid pipe 44 is provided on the bottom surface 21 a of the chemical liquid tank 21, and a tip provided with a drain cock 46 is extended to the vicinity of the purification tank 23. And a supply pipe 4 for connecting the purification tank 23 and the circulation pump 24.
A waste liquid pipe 45 provided with a drain cock 46 at the end thereof is connected to the intermediate part 1 through a connecting pipe 41a to clean the object 10 to be cleaned, and the contaminated electrolytic cleaning liquid 26 is discharged to another container by a hose or the like. I can do it.

The power supply 22 is supplied with an alternating current from a power supply in the workplace, and supplies the alternating current to the vibrator 28 to emit ultrasonic waves. At the same time, after supplying an alternating current to the converter 25 for electrolysis, a direct current converted by the converter 25 for electrolysis is received, and an anode current is supplied to the electrode 30.
And the cathodic current is supplied to the cage 20, and electricity is supplied through the electrolytic cleaning liquid 26 to perform electrolysis.

As shown in FIG. 1, the power supply 22 has an anode terminal hole 50 and a cathode terminal hole 51 to which an anode (+) current and a cathode (-) current are supplied from the electrolysis converter 25, respectively. The connection cord 48A connected to the anode terminal hole 50 is screwed to the shaft portion 34a of the swing shaft 34, and the connection cord 48B connected to the cathode terminal hole 51.
Are detachably connected to positioning portions 20d on both sides in the longitudinal direction of the cage 20 via terminals 49 (see FIG. 4). As described above, the DC current from the electrolytic converter 25 is caused to flow to the electrode 30 via the swing shaft 34 and to the object 10 to be cleaned via the cage 20, and is supplied with electricity through the electrolytic cleaning liquid 26. Electrolytic cleaning is performed. The chemical solution tank 21 is insulated by the insulating material 27, and the locking plate 33 of the rotating shaft 33 continuous with the swing shaft 34.
Since the a and the fixing plate portion 32b of the bearing portion 32 are also insulated, there is no problem such as a short circuit.

The power supply 22 has a main power supply 52 linked with a work timer, a switch 53 for driving the electromagnetic solenoid 35, a pilot lamp 54 which is turned on when the main power supply 52 is energized, and which is turned on when the electromagnetic solenoid 35 is energized. A pilot lamp 55 and an outlet 56 for outputting 100 V AC in conjunction with a work timer are provided.

The electrolysis converter 25 has an AC cord 70 connected to the interlocking outlet 56, and an AC / DC converter (not shown) connected to the AC cord 70.
Is provided. Further, in order to output a DC current from the AC / DC converter, an output section 65 on the anode side and an output section 66 on the cathode side are provided, respectively, and as described above, the anode output section 65 is provided.
Is connected to the anode terminal hole 50 of the power supply 22 by a connection cord (not shown), and the cathode output section 66 is connected to the cathode terminal hole 51.

If the voltage output from the output units 65 and 66 is too high, the object 10 to be cleaned is burned with alkali, while if it is too low, the cleaning effect is reduced.
A voltage adjustment volume 69 for adjusting the output voltage is provided, and the output voltage is set to 4 to 6V. Further, a power switch 67 and a pilot lamp 68 for displaying the operation of the electrolysis converter 25 are provided on the electrolysis converter 25.
Is provided. It should be noted that the power supply 22 and the electrolysis converter 25 having the above configuration can be integrally formed.

As shown in the circuit diagram of FIG. 8, the cleaning device having the above configuration connects the main power source 52 to the setting timer 57 of the electromagnetic solenoid 35 via the switch 53, and connects the setting timer 57 to the electromagnetic solenoid 35. are doing. The setting timer 57 is provided for the electrode 30 by the electromagnetic solenoid 35.
The number of swings is set. The greater the number of swings,
The stirring effect can be improved, and in the present embodiment, the chemical liquid tank 2 having a total length of about 280 mm is reciprocated about 20 to 60 times per minute.
The swing range is 30 to 50 mm with respect to 1.

A vibrator driver 58 connected to the vibrator 28 and the main power supply 52 are provided with a work timer 59.
Connected through. In this embodiment, the output of the ultrasonic wave transmitted from the transducer 28 by the transducer driver 58 is set to 20 to 40 KHz. The work timer 59 is linked to the outlet 56 and the circulation pump 2.
4 and a buzzer 61 for notifying the end of the work via an AC / DC converter 60.

The above-described cleaning apparatus is operated in the following steps to clean the cleaning object made of the mold to which the resin residue has adhered. First, after confirming that the main power supply 52 is in the OFF state, the AC cord 70 of the electrolysis converter 25 is connected to the interlocking outlet 56 of the power supply 22. In addition, the converter for electrolysis 2
5 and the anode terminal hole 50 and the cathode terminal hole 51 of the power supply 22 are connected by connection cords so that the polarities are not mistaken, and the shaft 34a of the swing shaft 34 and the power supply 22 are connected. The cord 48A on the anode side, the end of the positioning portion 20d of the car 20 and the cord 48B on the cathode side of the power supply 22 are connected.

Next, the electrolytic cleaning liquid 26 is stored in the chemical tank 21 and the purification tank 23. Next, the object to be cleaned 10 is housed inside the basket 20, and as shown in FIG. 5, the basket 20 is inserted into the chemical solution tank 21 while the swing shaft 34 is arranged to rotate upward, Positioning part 20 of cage 20
d is positioned and fixed corresponding to the groove 27a of the insulating material 27. After that, the rotated oscillating shaft 34 is horizontally arranged, and the electrode 30 continuous with the oscillating shaft 34 is
Soak in

Thereafter, the main power supply 52 of the power supply 22 is inputted, and the work timer 59 is operated to perform the work of cleaning the object 10 to be cleaned. That is, the operation of the work timer 59 causes the vibrator driver 58 to be energized, oscillates ultrasonic waves from the vibrator 28, and drives the circulating pump 24 to convect the electrolytic cleaning solution 26 in the chemical solution tank 21. Circulate. At the same time, AC1
A current of 00 V flows, and a current is supplied to the converter 25 for electrolysis.

Thereafter, the switch 53 of the power supply 22 is
The power switch 67 of the electrolysis converter 25 is input, and the electromagnetic solenoid 35 is operated to swing the swing shaft 34, and the electrolysis converter 25 is operated to enter the chemical solution tank 21 via the power supply 22. Apply DC voltage. At this time, the DC voltage to be output is finely adjusted by the voltage adjustment volume 69 of the converter 25 for electrolysis, and the DC voltage is set to 5 V.

The work timer 59 of the power supply 22 is set to 3 minutes, and when the set time expires, the work timer 59 supplies current to the interlock outlet 56, the pump 24 and the vibrator driver 58. Stop and stop the operation of each part. That is, the vibration of the electrolytic cleaning liquid 26 by the vibrator 28 and the electrolytic action of the cleaning object 10 and the electrode 30 are stopped. At the same time, the work timer 59 is set to AC / DC
A current is supplied to the converter 60, and the AC / DC converter 6
From 0, a DC current is supplied to the buzzer 61 to notify the worker of the end.

If the deposits 11 on the object 10 cannot be completely removed in three minutes, the main power supply 52 is turned off once.
The state is set to the FF state, and a cleaning operation is performed for another 3 minutes by inputting again. When the main power supply 52 is turned off during the cleaning operation for 3 minutes and the input is made again, the operation timer 59 is reset, and the operation timer 59 is reset for three minutes from the input.
A minute cleaning operation is performed.

As shown in FIG. 9, the cleaning apparatus of the present invention, which uses both the electrolytic method and the ultrasonic cleaning method, uses the ultrasonic cleaning method to remove the adherent 11 from the outside of the object 10 to be cleaned.
And the attached substance 11 is lifted up from the article 10 to be cleaned by hydrogen gas generated from the inside by the electrolytic cleaning method, and the attached substance 11 is peeled off from the article 10 to be removed by the stirring action of the electrolytic cleaning liquid 26. I do.

That is, as shown in FIG. 9A, when the ultrasonic waves generated by the vibrator 28 are transmitted to the surface of the cleaning object 10 via the electrolytic cleaning liquid 26, vacuum bubbles are generated on the surface. At the same time, when the bubbles pop, a strong energy is generated and the adhered substance 1 adhered to the object 10 to be cleaned.
Peel 1 off. This ultrasonic cleaning method, in particular,
It is effective to clean the mold that forms the complicated and complicated engineering plastic without damaging it.

In addition, the cleaning apparatus energizes the object 10 through the electrolytic cleaning solution 26 in addition to the above-described external cleaning, thereby generating a large amount of hydrogen gas from the surface of the object 10 to be cleaned. The deposit 11 is lifted up by an ultrasonic method, and is removed by the stirring action of the electrolytic cleaning liquid 26.

That is, a voltage on the cathode side is supplied to the cleaning object 10 through the cage 20, and this voltage is applied to the electrode 3.
The voltage on the anode side, which is energized to 0, is applied through the electrolytic cleaning liquid 26 to generate bubble-like hydrogen gas from the object to be cleaned 10 and the inside of the electrode 30. As shown, the deposit 11 is raised. This energizing action causes the adhered substance 11 of the object 10 to be cleaned to be destroyed from the outside by the ultrasonic waves. Absent.

The adhered substance 11 thus floated is subjected to convection of the electrolytic cleaning liquid 26 by the circulation pump 24 and
By the stirring of the electrolytic cleaning liquid 26 by the oscillation of the electrode 30 by the electromagnetic solenoid 35, as shown in FIG. 9C, the adhered substance 11 is separated from the object to be cleaned 10, and the adhered substance 11 is separated from the object to be cleaned 10. Separated and removed reliably.

The removed deposit 11 rides on the convection of the electrolytic cleaning liquid 26 and flows through the discharge pipe 43 through the purifying tank 2.
3 by the nonwoven fabric 40 of the purification tank 23
It is separated and removed from the electrolytic cleaning liquid 26. That is, since the removed deposit 11 is prevented from attaching to the cleaning target 10 again, the cleaning efficiency of the cleaning target 10 can be further improved. Further, since the cleaning tank 23 can prevent the electrolytic cleaning liquid 26 and the deposit 11 from mixing and deteriorating, the life of the electrolytic cleaning liquid 26 can be extended.

Furthermore, the use of the electromagnetic solenoid 35 for swinging the electrode 30 not only makes the stirring action of the electrolytic cleaning liquid 26 more efficient as described above, but also allows the object 10 to be cleaned having a complicated shape to be shaded. Can be eliminated, so that a reliable energizing action can be applied.
The deposits 11 can be reliably removed.

As described above, the cleaning apparatus of the present invention uses both the ultrasonic cleaning method and the electrolytic cleaning method, and oscillates the circulating pump 24 and the electrode 30 so that the electrolytic cleaning liquid 26 can be used.
Is conveyed to obtain a reliable stirring effect, so that the adhered substance 11 adhered to the object to be cleaned 10 can be reliably removed in a short time. For example, deposits attached to 100 ejector pins can be completely removed in 3 minutes. Therefore, for a long time, the electrolytic cleaning solution 26
There is no problem such as alkali burning of the article to be cleaned 10 caused by being immersed.

The cleaning apparatus having the above-described structure is provided with a circulation pump 24.
Discharge amount of the electrolytic cleaning liquid 26 due to the
If the convection of the pump 6 is strong, the cleaning effect by the ultrasonic method is reduced. Therefore, as shown by the dashed line in the circuit diagram shown in FIG. And the circulation pump 24 may be operated with the required time delayed.

While the circulation pump 24 is not operating, the object 10 to be cleaned is cleaned by the ultrasonic cleaning method in the same manner as described above.
At the same time, the deposits 11 are removed from the substrate, and portions that cannot be removed by the ultrasonic method are raised by the electrolytic method. At this time, the electrode 30 is swung, and the agitation of the electrolytic cleaning liquid 26 is performed by the swing.

Thereafter, the circulation pump 24 is operated with a delay by the delay timer, the convection of the electrolytic cleaning liquid 26 is carried out, and the agitation is performed efficiently, so that the adhering substance 11 raised as described above is surely separated and removed. . As described above, by adopting the above configuration, the adhered substance 1 can be removed from the object to be cleaned 10 in the same manner as described above without lowering the cleaning effect by the ultrasonic method.
1 can be reliably removed.

FIG. 10 shows a modification of the cleaning device, in which four electrodes 30 are immersed in an electrolytic cleaning liquid 26. That is, the bent portions 34b, 34b projecting in a V-shape extending downward from the shaft portion 34a of the swing shaft 34 are
Are provided at predetermined intervals in the width direction, and electrodes 30 'are provided at their ends with equally spaced gaps in the width direction.

With the above configuration, the electrolytic cleaning solution 2
The stirring efficiency of No. 6 can be further improved, and even if the object to be cleaned 11 has a complicated shape, a portion that becomes more negative can be eliminated, and the removal action can be improved by the electrolytic method.

FIGS. 11A to 11F show modified examples of the electrode 30. FIG. The rod-shaped electrode 30 shown in FIGS. 11A, 11B, and 11C has an elliptical, circular, or hexagonal end face, and has an outer portion tapered. Therefore, it is possible to increase the rocking speed of the electromagnetic solenoid 35 by preventing the electrolytic cleaning liquid 30 from scattering due to the rocking of the electrode 30. More preferably, as shown in FIGS. 11 (D), (E), and (F), a semicircular shape, a triangular shape, or a trapezoidal shape is provided, the outer portion is tapered, and a surface parallel to the bent portion 34b is provided on the inner surface side. . Therefore, the scattering of the electrolytic cleaning liquid 26 can be prevented, and the stirring efficiency of the electrolytic cleaning liquid 26 can be improved.

[0058]

As is apparent from the above description, according to the cleaning apparatus of the present invention, the vibrator for transmitting ultrasonic waves to vibrate the electrolytic cleaning liquid is provided on the bottom surface of the chemical solution tank containing the electrolytic cleaning liquid. Therefore, the object to be cleaned can be cleaned by the ultrasonic method. In addition, the holder which is detachably mounted on the chemical solution tank and has a conductive holder for accommodating the object to be cleaned is a cathode.
(−), And the electrode immersed in the electrolytic cleaning solution is connected to the anode (+), so that the object to be cleaned connected to the cathode through the above-mentioned holder is energized to perform electrolytic cleaning. I can do it. Further, sodium hydroxide, E
By using an alkaline solution containing DTA and sodium gluconate, it is possible to reliably remove the resin residue from the mold in a short time by making sure that the object to be cleaned and the electrode are reliably energized.

As described above, the adhered substance is broken down and removed from the outside of the object to be cleaned by the ultrasonic cleaning method, and the adhered substance is lifted up from the inside of the object to be cleaned by the electrolytic cleaning method, thereby being surely peeled off. In combination with the chemical characteristics of the electrolytic cleaning solution, the cleaning operation of the object to be cleaned can be performed in a very short operation time as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cleaning device of the present invention.

FIG. 2 is a perspective view showing a basket for storing an object to be cleaned.

FIG. 3 is a side view showing a part of the cleaning device in section.

FIG. 4 is an enlarged view of a part of the cleaning device.

FIG. 5 is a schematic perspective view showing a state where a basket is put in a chemical solution tank.

FIGS. 6A and 6B are plan views showing a state in which a vibrator for transmitting ultrasonic waves is arranged in a chemical solution tank.

FIG. 7 is a perspective view showing a piping state of a circulating electrolytic cleaning liquid.

FIG. 8 is a circuit diagram of a cleaning device.

FIGS. 9A, 9B, and 9C are schematic diagrams showing a step of removing deposits by a cleaning device.

FIG. 10 is a perspective view showing a modification of the cleaning device.

FIGS. 11A to 11F are schematic diagrams showing modified examples of electrodes.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 To-be-cleaned thing (die) 11 Attached matter 20 Basket 21 Chemical tank 22 Ultrasonic power supply 23 Purification tank 24 Circulation pump 25 Electrolysis power supply 26 Electrolytic cleaning liquid 30 Electrode 34 Oscillating shaft 34a Shaft 34b Bending part 35 Electromagnetic solenoid (drive means) 40 Non-woven fabric (filter cloth) 42 Supply pipe 43 Discharge pipe

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 33/72

Claims (1)

(57) [Claims] 1. A chemical liquid tank containing an electrolytic cleaning liquid, a vibrator disposed on the bottom of the chemical liquid tank to generate ultrasonic vibrations in the electrolytic cleaning liquid in the chemical liquid tank, and a resin molding die inside. The object to be cleaned is accommodated, and is mounted together with the object to be cleaned so as not to come into contact with the bottom surface in the chemical solution tank.
Wear to the frame having conductivity which is immersed in the electrolytic washing liquid
A basket with a mesh stretched over it and housed on the basket in the electrolytic cleaning solution in the chemical tank
An electrode suspended above and immersed above the object to be cleaned ; supplying an anode (+) to the electrode; and supplying a cathode (-) to the object to be cleaned via the cage to generate hydrogen gas. And sodium hydroxide, EDTA, sodium gluconate and ammonia as the electrolytic cleaning solution.
An apparatus for cleaning a synthetic resin mold, characterized by using a material containing a near compound .