JP3852800B2 - Mold holding basket used for mold cleaning equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a mold holding basket used in a synthetic resin molding mold cleaning apparatus.
[0002]
[Prior art]
Synthetic resin molds have resin debris and deposits such as burn marks due to gas adhering to the inner surface as the resin product is molded, and these deposits deteriorate the release of products 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.
[0003]
Conventionally, the present applicant has provided a cleaning apparatus shown in FIGS. 10 and 11 in Japanese Patent Application Laid-Open No. 7-214570 as a cleaning apparatus for this type of mold. 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. 10 and 11, 1 is a cleaning tank, 2 is a metal mold holding basket that is detachably inserted into the cleaning tank, 3 is a positive electrode suspended in the cleaning tank, 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. Therefore, the mold 5 is cleaned by using both electrolytic cleaning and ultrasonic cleaning.
[0004]
[Problems to be solved by the invention]
Since the above-described mold cleaning apparatus uses both electrolytic cleaning and ultrasonic cleaning, the deposits on the mold can be removed very efficiently in a short time, and the cleaning effect is excellent. Recently, the amount of molds to be cleaned at a time has become large, and the mold holding basket has a problem in that it is not easy to use because it does not have a configuration corresponding to it.
[0005]
The present invention has been made in view of the above-described problems. It is an object of the present invention to make it easier to use a mold holding basket, as well as to cope with an increase in the amount of molds and other improvements.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is the first aspect of the present invention, wherein a mold as an object to be cleaned is held in a metal mold holding basket and immersed in the electrolytic cleaning liquid in a cleaning tank containing the electrolytic cleaning liquid. In addition, the electrode material is suspended in the cleaning tank, the electrode material and the metal basket are connected to the positive side and the negative side of a power source, and the electrolytic cleaning of the mold is performed by energizing the electrolytic cleaning solution. The metal mold holding basket used in the apparatus for performing
A rectangular bottom surface made of a porous metal material for holding a mold, a support arm standing from the bottom surface and placed on the upper surface frame of the cleaning tank, and protruding from the bottom surface or the support arm A mold holding basket for use in a mold cleaning apparatus, wherein the required number of mold holding baskets are sequentially connected using the connecting means so that the mold holding area can be set to an arbitrary size. Is provided.
[0007]
As described above, if the mold holding basket can be detachably connected, the mold holding basket can be enlarged according to the amount of mold to be cleaned, and various types of mold holding baskets of different sizes can be easily obtained. This makes it easy to manage and reduce the storage space.
[0008]
In addition, a mold holding basket used for a mold cleaning apparatus similar to claim 1 has a rectangular bottom surface portion made of a porous metal material for holding a mold, and is erected from the bottom surface portion to A support arm placed on the upper surface frame and a partition plate protruding from the bottom surface portion may be provided.
[0009]
If the partition plate is provided as described above, the mold mounted on the basket is difficult to fall down and can be stably held. If the mold falls over and contacts the negative electrode plate during cleaning, a short circuit occurs and damage occurs in that portion. However, if the partition plate is provided to hold the mold stably, the above problem can be solved.
[0010]
Further, the present invention is to hold a metal mold as an object to be cleaned in a metal mold holding basket and immerse it in the electrolytic cleaning liquid in a cleaning tank containing the electrolytic cleaning liquid, and to put an electrode material in the cleaning tank. suspension, the electrode material and the above metal cage connected to the positive side and the negative side of the power supply, the metallic gold for use in energized through the electrolytic cleaning liquid apparatus for performing electrolytic cleaning of the mold A mold holding basket,
Holding basket of the mold has a rectangular bottom portion made of a porous metal material for holding the mold, are erected from the bottom surface portion is placed on the upper surface frame of the cleaning tank, the upper surface of the cleaning tank A support arm that is brought into contact with the power supply plate attached to the side and electrically connected to the electrode, and a separate pressing plate that covers the mold placed on the bottom surface portion, and C-shaped rings are attached to the four corners of the pressing plate, A mold holding basket for use in a mold cleaning apparatus is provided in which the C-shaped ring is fitted and attached to the support arm.
[0011]
In other words, if the mold mounted on the bottom of the mold holding basket is small and light, the mold may be lifted in the liquid in the cleaning tank. ing. This holding plate part is preferably formed from a mesh net or the like. For example, it is attached via a hinge from the upper surface of the outer frame of the bottom part, and after the mold is mounted, the holding plate is tilted to cover the mold. Yes.
[0014]
The support arm of the mold holding basket is provided with an insulating coating on the surface of a metal material, and only the tip of the metal arm is exposed and brought into contact with the power supply plate attached to the upper surface side of the cleaning tank to be electrically connected to the negative electrode. The configuration is to let The bottom surface portion is formed of a metal perforated plate such as a metal mesh or punching metal, and the support arm is electrically connected to the metal mold mounted on the bottom surface portion via the bottom surface portion.
[0015]
That is, the washing tank in which the mold holding basket is mounted has an insulating base attached to the periphery of the upper opening, and positive and negative metal power supply plates are fixed on the insulating base, and the negative metal power supply is fixed. The metal basket is detachably attached to the cleaning tank by being in conductive contact with the plate, and the both ends of the current-carrying support rod of the electrode material are conductively contacted to the plus side metal power supply plate and detachably mounted. . And each said metal electric power feeding plate is connected with the power supply via the bus bar arrange | positioned along the outer surface of the said washing tank, without using a wire harness.
[0016]
The metal power supply plate is provided with means for positioning and holding the metal cage and the current-carrying support rod of the electrode material. The metal power supply plate is made of stainless steel, titanium, brass, phosphor bronze, etc., and is fixed to the insulating base with a fastener, and a current-carrying bolt passed through the power supply plate is passed through the insulating base, and its lower end is made conductive. It is connected to a bus bar made of a metal plate, and the bus bar is routed to the power source side. The metal power supply plate is provided with positioning protrusions, and is positioned and held by placing a basket support arm and a conductive support rod in contact with the protrusions. Furthermore, a spring plate or the like is attached to fix the cage support arm and conduction support rod positioned on the metal power supply plate. In this way, the basket support arm and the conductive support rod are positioned and fixed on the metal power supply plate on the upper surface of the cleaning tank with substantially one touch.
[0017]
It is preferable to provide a vibrator for generating ultrasonic vibration in the electrolytic cleaning liquid in the cleaning tank. That is, the cleaning of the mold in the cleaning tank is effective only by the electrolytic cleaning, but further cleaning power can be enhanced by combining cleaning by ultrasonic vibration.
[0018]
The present invention also provides a cleaning liquid to be stored in the cleaning tank, the cleaning liquid comprising an alkali solution containing sodium hydroxide and / or potassium hydroxide, an alkali salt of EDTA, and sodium gluconate, The electrolytic cleaning solution is circulated or stored in the cleaning layer. The alkali salt of EDTA (ethylenediaminetetraacetic acid) is a compound in which all or part of the hydrogen atoms of the carboxylic acid group of EDTA are substituted with alkali metal atoms. Specific examples include EDTA disodium salt and EDTA tetrasodium salt. Can be mentioned.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
1 to 5 show a first embodiment, and a cleaning apparatus using a mold holding basket according to the present invention uses an ultrasonic cleaning method and an electrolytic cleaning method in combination to perform cleaning while mounted on a mold holding basket. Deposits such as resin adhering to the mold 5 are surely removed in a short time.
[0020]
The cleaning apparatus has a cleaning tank 11 fixed to one side of the upper partition plate 10a of the frame 10 with casters, and a power supply 12, a controller 13, a circulation pump 14, and an electrolysis converter 17 on the other side. The required drive device such as the above is mounted, and the purification tank 16, the ultrasonic generator 90, and the like are mounted on the lower partition plate 10b, and the outer peripheral surface of the frame 10 is closed by the outer cover 18. The electrolytic cleaning liquid 20 put into the cleaning tank 11 uses an alkaline solution in which sodium hydroxide or / and potassium hydroxide is mixed with water.
[0021]
The washing tank 11 is made of stainless steel, and an insulating base 19 made of Duracon is attached to the upper surface of the outer peripheral flange portion surrounding the upper surface opening. Inside the cleaning tank 11, a metal mold holding basket 22 is detachably suspended by suspending its support arm from the insulating base 21, and in the cleaning tank 11, the cleaning tank The basket 22 is prevented from contacting the bottom surface and the inner peripheral surface of the motor 11.
[0022]
As shown in FIG. 3, the mold holding basket 22 has support arms 51 and 52 projecting from the four corners of a rectangular bottom surface portion 50 made of punching metal and opposite sides in the length direction. The support arms 51 at the four corners are rod-like and are placed on the insulating base 21 with their tips bent. On the other hand, the pair of support arms 52 in the center are connected by a horizontal frame 52b in which the upper ends of the pair of vertical frames 52a are bent in the horizontal direction, and placed on the power supply plate 23 that fixes the horizontal frame 52b on the insulating base 21. To make it conductive. In addition, the upper ends of the left and right vertical frames 52a are connected by hook-shaped hooks 53 having an inverted U shape. The hook locking portion 53 locks and lifts a hook 54 attached to the tip of a hoist (not shown) as required.
[0023]
Further, an outer frame 55 is provided along the outer periphery of the bottom surface portion 50, and the lower ends of the support arms 51 and 52 are fixedly welded to the outer frame 55, and a grid-like partition plate 56 is provided on the bottom surface portion 50. The bottom surface portion 50 having a large area is divided into a mold mounting portion 57 having a small area.
[0024]
Further, a bolt 60 is projected from one outer surface of one of the short side 55a and one of the long side 55b of the outer frame 55, and a bolt hole 61 is formed at a distance. As a result, as shown in FIG. 4, the mold holding cages 22-1, 22-2 are connected, and the bolt 60 of one cage 22-1 is inserted into the bolt hole 61 of the other cage 22-2. By fastening with the nut 62, the mold holding basket can be arbitrarily enlarged in both the vertical and horizontal directions.
[0025]
Instead of connecting with the bolts, the spring plate is pivotally attached to the outer frame of the mold holding cage via a support shaft around which a coil spring is wound, and the elastic plate is pressed with the outer frame connecting the spring plate. You may make it connect a metal mold | die holding basket by pinching.
[0026]
The support arms 51 and 52 of the mold holding basket 22 are insulatively coated so as not to be energized by coming into contact with the inner surface of the cleaning tank 11, and the insulating coating is not provided only in the contact portion with the power supply plate 23. The bottom part made of punching metal or metal mesh is not covered with insulation, and the minus side electrode is made to conduct to the mold 5 to be mounted.
[0027]
Further, a power feeding plate 27 is attached on the other two opposite sides of the insulating base 21 and connected to the positive side electrode of the energizing bolt, bus bar, and electrolysis replacement air 17 in the same manner as the negative side power feeding plate 23. ing. As shown in FIG. 5, both ends of a current-carrying support rod 28 that is detachably mounted on the central portion of the cleaning tank 11 are in contact with the power supply plate 27. The energizing support rod 28 is provided with mounting holes 28a at regular intervals in the length direction, and the lower end of the upper vertical axis 29a is bifurcated in the lateral direction into these mounting holes 28a, and the tips of these branching portions 29b are branched. Is bent downward, and an electrode material 29 having a circular electrode plate 29c attached to the lower end thereof so as to be swingable is attached so that the vertical length can be adjusted. Is not in contact with the mold and the holding basket 22.
[0028]
Furthermore, an ultrasonic vibrator 91 for performing ultrasonic cleaning is attached to the bottom surface of the cleaning tank 11, the vibrator 91 is connected to the ultrasonic generator 90, and the electrolytic cleaning liquid 20 in the cleaning tank 11. To generate ultrasonic vibration. The ultrasonic vibration is alternately oscillated at a frequency of 24 KHz to 40 KHz or at a frequency of 24 KHz and 30 KHz.
[0029]
In the cleaning apparatus having the above configuration, at the time of work, first, the electrolytic cleaning liquid 20 is put into the cleaning tank 11 and heated to a required temperature, and then the mold 5 to be cleaned is mounted on the mold holding basket 22 and the cleaning tank 11 is mounted. Install inside.
[0030]
At that time, when the mold 5 to be mounted on the mold holding basket 22 is large and it is difficult for the worker to handle, a hoist is used and the hook is hooked on the hook locking portion 53 of the mold holding basket and lifted. Then, it is lowered and immersed in the washing tank 11 while maintaining the level. When the mold holding basket is small, the mold holding basket is connected and enlarged for use.
[0031]
The mold holding basket 22 inserted into the cleaning tank 11 is connected to the negative electrode side with its support arm in contact with the power supply plate 23, and the electrode material 29 is also attached to the cleaning tank 11 and in contact with the power supply plate 27. Connect to the positive pole side. Accordingly, the mold holding basket 22 and the electrode material 29 are energized from the power supply plates 23 and 27, and the electrolytic cleaning of the mold 5 held by the mold holding basket 22 is performed through the electrolytic cleaning solution 20. At this time, the voltage of the electrolysis converter 17 is adjusted to set a DC voltage output at ^{2 to} 7 Amps per 1 dm ² . At the same time, a vibrator that generates ultrasonic vibrations of 24 KHz and 30 KHz is operated. When the work time set by the timer elapses, the energization is automatically stopped and the cleaning work is finished. If the deposits on the mold 5 cannot be completely removed, the cleaning operation is performed again by setting a timer.
[0032]
A cleaning apparatus that uses both an electrolytic method and an ultrasonic cleaning method uses an ultrasonic cleaning method to vibrate the deposits such as resin residue from the outside of the mold 5 to lift the deposits and to remove the electrolytic cleaning solution. Intrusion or destruction of deposits is caused, and the deposits are lifted from the mold 5 by hydrogen gas 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.
[0033]
Further, at the time of the cleaning operation, the mold 5 in the mold holding basket 22 is supported by the partition plate 56 so as not to fall down, so that the mold 5 falls down and comes into contact with the electrode plate 29c at the time of cleaning. Can be prevented.
[0034]
6 (A) and 6 (B) show the mold holding basket 22 of the second embodiment, and a pressing plate 71 made of a fine mesh is attached to the upper end of one side of the outer frame 55 surrounding the bottom surface portion 50 via a hinge 70, The mold 5 placed on the bottom surface portion 50 is pressed from above and closed with a spring plate 73 attached to the opposing outer frame 55. As described above, when the presser plate 71 is provided, if the mold 5 is small and light, it may be lifted by buoyancy in the cleaning liquid. In such a case, the presser plate 71 is covered to prevent the lift. Yes.
[0035]
As shown in FIG. 7, the mold holding basket 22 and the pressing plate 71 ′ are separated, and a C-shaped ring 72 is attached to the four corners of the pressing plate 71 ′, and the C-shaped ring 72 is fitted to the support arm 51. May be attached together.
[0036]
FIG. 8 shows the mold holding basket 22 of the reference first embodiment, which includes a bottom surface portion 50 having a relatively large area, a support arm 51 protruding from the bottom surface portion 50 at an interval, and upper portions of these support arms 51. Are refracted horizontally, and their tips are connected by an outer peripheral frame 69. A part of the support arm 51 is in contact with the power supply plate 23 on the upper surface of the cleaning tank 11. With this configuration, the hoist hook can be locked at an arbitrary position on the outer peripheral frame 69, and it is not necessary to provide a hook locking portion.
[0037]
FIGS. 9A, 9B, and 9C show the mold holding cage 22 of the reference second embodiment. As in the third embodiment, an outer peripheral frame 69 is provided on the upper surface, and hoist hooks are provided at four corners thereof. A suspension ring 80 is provided to be locked. As described above, when the suspension rings 80 are provided at the four corners and lifted as shown in FIG. 9C, the mold holding basket 22 can be stably lifted with a hoist and immersed in the cleaning tank .
[0038]
【The invention's effect】
As is clear from the above description, according to the mold holding basket used in the electrolytic cleaning type mold cleaning apparatus according to the present invention, when a large amount of mold is mounted on the mold holding basket, a hoist is used. It can be handled and the burden on the operator can be reduced. Further, by connecting the mold holding basket, it is possible to increase the amount of molds that can be held and increase the amount that can be cleaned at a time, thereby improving the efficiency of the mold cleaning operation.
[0039]
Furthermore, when the partition plate is provided, the mold to be mounted can be stably held, and when the pressing plate is provided, the lifting can be prevented when washing the light and small mold.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a mold cleaning apparatus used in the present invention.
FIG. 2 is a schematic front view of the mold cleaning apparatus.
FIG. 3 is a perspective view of a mold holding basket of the first embodiment.
FIG. 4 is a cross-sectional view of a principal part showing a state where the mold holding basket is connected.
FIG. 5 is a perspective view of essential parts of the cleaning device of FIG. 1;
6A is a perspective view of a mold holding basket according to a second embodiment, and FIG. 6B is a cross-sectional view showing a state in which a pressing plate is closed.
FIG. 7 is a perspective view showing a modification of the second embodiment.
8 is a perspective view of a mold holding basket Reference first embodiment.
9 shows a mold holding basket Reference second embodiment, (A) is a plan view, (B) is a front view, a front view of a state in which the lifting in (C) is a hoist.
FIG. 10 is a perspective view of a conventional example.
FIG. 11 is a cross-sectional view of a main part of the conventional example.
[Explanation of symbols]
5 Mold 10 Frame 11 Washing tank 22 Mold holding basket 23, 27 Feed plate 28 Conductive support rod 29 Electrode material 50 Bottom surface portion 51, 52 Support arm 56 Partition plate 71 Press plate

Claims (3)

In the cleaning tank containing the electrolytic cleaning liquid, the mold that is the object to be cleaned is held in a metal mold holding basket and immersed in the electrolytic cleaning liquid, and the electrode material is suspended in the cleaning tank. And the metal mold holding basket used in a device for connecting the positive and negative sides of the power source to the positive side and the negative side of the power source and conducting the electrolytic cleaning of the mold by energizing through the electrolytic cleaning solution. ,
A rectangular bottom surface made of a porous metal material for holding a mold, a support arm standing from the bottom surface and placed on the upper surface frame of the cleaning tank, and protruding from the bottom surface or the support arm A mold holding basket for use in a mold cleaning apparatus, wherein the required number of mold holding baskets are sequentially connected using the connecting means so that the mold holding area can be set to an arbitrary size. . In the cleaning tank containing the electrolytic cleaning liquid, the mold that is the object to be cleaned is held in a metal mold holding basket and immersed in the electrolytic cleaning liquid, and the electrode material is suspended in the cleaning tank. It said a metal cage connected to the positive side and the negative side of the power supply, are the above metal mold holding basket for use in the apparatus for performing electrolytic cleaning of the die and energized through the electrolytic cleaning liquid ,
Said mold holding basket has a rectangular bottom portion made of a porous metal material for holding the mold, the upper surface of the cleaning tank is erected from the bottom surface portion is placed on the upper surface frame of the washing tub A supporting arm that is brought into contact with the attached power supply plate and brought into conduction with the electrode, and a separate pressing plate that covers the mold placed on the bottom surface portion, are attached with C-shaped rings at four corners of the pressing plate, A mold holding basket used for a mold cleaning apparatus, wherein a ring-shaped ring is fitted and attached to the support arm . The mold holding basket according to claim 1 or 2, wherein the mold is a synthetic resin molding mold .

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