KR20170045027A

KR20170045027A - Ultrasonic cleaning device for mold

Info

Publication number: KR20170045027A
Application number: KR1020150144906A
Authority: KR
Inventors: 유명목
Original assignee: 주식회사 유일초음파
Priority date: 2015-10-16
Filing date: 2015-10-16
Publication date: 2017-04-26
Also published as: KR101883717B1

Abstract

Disclosed is a variable ultrasonic mold cleaning device which is easy to adjust the position of an electrode and which enhances mold detergency by applying ultrasonic waves together with electrolysis. The present invention includes: a main body (1); a washing tub (10) mounted on an upper surface of the main body (1); a shelf (20) mounted inside the washing tub to store an article to be cleaned; an electrode unit (30) mounted on the washing tank (10) so as to be positioned at an upper end of the shelf (20); an ultrasonic oscillator (40) installed in the main body (1) to generate ultrasonic waves to be supplied to a cleaning liquid contained in the washing tub (10); and an insulated-gate bipolar transistor (IGBT) rectifier (50) connected to the electrode unit (30) and the shelf (20) by a cable to supply power. Thus, the present invention can improve the detergency of a mold.

Description

ULTRASONIC CLEANING DEVICE FOR MOLD

The present invention relates to a variable-type ultrasonic mold cleaner, and more particularly, to a variable-type ultrasonic mold cleaner capable of removing foreign substances from a mold using a cleaning liquid, ultrasonic waves, and electrolysis, and having a flexible shaft capable of plastic deformation, The present invention relates to a variable-type ultrasonic mold cleaner.

Generally, ultrasonic cleaning is mainly performed by atomization atomization of an ultrasonic wave, acceleration of water particles and cavitation phenomenon. The cavitation phenomenon is a phenomenon in which micro bubbles are generated and extinguished by the pressure of an ultrasonic wave when energy of ultrasonic waves propagates in a solution With very high pressure and high temperature. This shock wave makes it possible to wash the inside of the object to be washed, which is contained in the solution, in a position not visible deep within a short time. In the actual case, a high cleaning effect is obtained by causing a synergistic effect with the detergent such as the stirring effect heat operation by the radiation pressure of the ultrasonic wave itself against the impact energy by the cavitation. Various types of ultrasonic cleaners have been used with this principle.

The variable type ultrasonic mold cleaner is widely used for cleaning glass, pipe, barrel, and the like, and for cleaning molds.

After injection of a resin product or the like, contaminants such as debris and carbonized gas adhere to the core and the mold frame of the injection mold and remain. Such contaminants adhering to the mold make it difficult to separate the product from the mold later, change in color of the injection product and surface of the product are not smooth, resulting in product failure. These attachments must be cleaned in order to maintain the extreme accuracy required, especially as the synthetic resin mold technology improves.

Conventionally, in order to remove such contaminants from a mold, an injection mold is first placed in a tank contained in a cleaning liquid, and an injection mold is cleaned by applying ultrasonic waves.

However, cleaning of the mold using the conventional variable type ultrasonic mold cleaner has a problem that it takes much time to remove contaminants attached to the mold. In addition, in the case of a metal mold having a complicated shape, there is a problem that a difference in the cleaning effect partially occurs.

Korean Patent Laid-Open No. 10-2005-0062844 (Ultrasonic Cleaning Oscillator 2005.06.28.)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a variable-type ultrasonic mold cleaner capable of improving a cleaning effect of a mold.

It is still another object of the present invention to provide a variable-type ultrasonic mold cleaner in which a flexible shaft is formed at an intermediate portion of an electrode rod to easily improve a foreign matter removing capability of a portion of the mold where the cleaning is difficult.

Another object of the present invention is to provide a variable-type ultrasonic mold cleaner which improves the cleaning ability and improves the durability of the product by improving the rectification method.

According to an aspect of the present invention, there is provided a variable-type ultrasonic mold cleaner including: a washing tub mounted on a top surface of a main body; A shelf for storing the article to be cleaned, which is placed inside the cleaning tank; An electrode unit mounted on the washing tub to be positioned at an upper end of the shelf and having an electrode shaft capable of plastic deformation; And an ultrasonic oscillator mounted in the body to generate ultrasonic waves to be supplied to the cleaning liquid contained in the cleaning tank; .

More preferably, the electrode unit includes a horizontal member having a plurality of fixing holes; An electrode shaft having a flexible shaft capable of being selectively installed in a fixing hole of the transverse member and capable of plastic deformation at least in a section of the intermediate region; And an electrode connected to an end of the electrode shaft.

More preferably, one end of the electrode shaft is branched into a plurality of axes, and the flexible shaft is provided in the branched area.

Still more preferably, the power supply further includes an IGBT rectifier that generates an output wave of 25,000 or more per second and generates power to be supplied to the electrode unit and the lathe.

As described above, according to the flexible ultrasonic mold cleaner of the present invention, since the direction of the electrode can be adjusted by forming the flexible shaft on the electrode shaft constituting the electrode part, the electrode can be intensively directed to a specific part of the mold, The foreign matter removal effect is improved.

Further, the variable-type ultrasonic mold cleaner according to the present invention improves the cleaning effect of the mold by using a combination of a cleaning liquid, electrolysis, and ultrasonic waves.

Further, by using the IGBT rectifier of the variable type ultrasonic mold cleaner according to the present invention, the electrolysis efficiency is improved, the component failure is small, and high-speed response is possible.

1 is a perspective view illustrating a variable-type ultrasonic mold cleaner according to a preferred embodiment of the present invention,
2 is a sectional view showing the internal structure of the variable-type ultrasonic mold cleaner,
3 is a side view showing the internal structure of the variable-type ultrasonic mold cleaner,
4 is a perspective view showing a shelf of a variable-type ultrasonic mold cleaner,
5 is a perspective view showing an electrode of a variable-type ultrasonic mold cleaner,
6 is a state diagram showing an operation state of the electrode.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a variable-type ultrasonic mold cleaner according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Here, the shape, size, ratio, angle, number and the like shown in the accompanying drawings are schematic and may be modified somewhat. 2) Since the drawing is shown by the line of sight of the observer, the direction or position to explain the drawing can be variously changed according to the position of the observer. 3) The same reference numerals can be used for the same parts even if the drawing numbers are different. 4) If 'include', 'have', 'have', etc. are used, other parts can be added unless '~ only' is used. 5) Numerals can also be interpreted as described in the singular. 6) Even if the shape, size comparison, positional relationship, etc. are not described as 'weak or substantial', it is interpreted to include the normal error range. 7) 'after', 'before', 'after', 'after', and 'after' are not used to limit the temporal position. 8) The terms 'first, second, third', etc. are used selectively, interchangeably or repeatedly for convenience of division, and are not construed in a limiting sense. 9) If the positional relationship of the two parts is described as 'on top of', 'on top', 'on bottom', 'on side', 'on side' and so on, This can also be located. 10) When parts are electrically connected to '~ or', parts are interpreted to include not only singles but also combinations, but parts are interpreted solely if they are electrically connected to '~ or'.

FIG. 1 is a perspective view showing a variable-type ultrasonic mold cleaner according to a preferred embodiment of the present invention, FIG. 2 is a sectional view showing the internal structure of a variable-type ultrasonic mold cleaner, FIG. 3 is a side view FIG. 4 is a perspective view showing the shelf of the variable-type ultrasonic mold cleaner, FIG. 5 is a perspective view showing the electrode of the variable-type ultrasonic mold cleaner, and FIG. 6 is a state diagram showing the operation state of the electrode.

1 to 6, a variable-type ultrasonic mold cleaner according to a preferred embodiment of the present invention includes a main body 1, a washing tank 10 mounted on the upper surface of the main body 1, An electrode unit 30 mounted on the washing tub 10 so as to be positioned at an upper end of the shelf 20 and a washing unit 20 mounted inside the washing tub 10, And an IGBT rectifier 50 connected to the electrode unit 30 and the shelf 20 via a cable to supply power to the electrode unit 30. The ultrasonic oscillator 40 generates ultrasound to be supplied to the cleaning liquid contained in the cleaning liquid.

The main body 1 is preferably formed in a hexahedron shape having an internal space, and a washing tank 10 is formed on the top surface of the main body 1 so as to be recessed at a predetermined depth to fill the washing liquid. At least one washing tub 10 is formed on the top surface, and a plurality of washing tubs 10 may be formed.

A holder 2 for holding the used electrode unit 30 is formed at one side of the upper surface of the main body 1. The holder 2 is formed in a shape of two columns protruded so that both ends of the electrode unit 30 can be mounted. A pedestal (3) is formed at the lower end of the holder (2) so that the cleaning liquid dropped on the electrode part (30) falls down. The pedestal 3 may be configured to communicate with the washing tub 10 to transfer the washing liquid dropped to the washing tub 10 or may be connected to a drain line through which the used washing liquid is drained.

An ultrasonic oscillator (40) is mounted on the inner bottom of the main body (1). The ultrasonic oscillator 40 is connected to the vibrator 41 by removing ultrasonic waves having a proper frequency for a certain period of time to clean the mold in the washing tub 10 to remove foreign matter adhering to the mold.

The vibrator 41 is mounted so as to be able to keep airtight with the washing tub 10. The vibrator 41 is detachably coupled to the washing tub 10. The vibrator 41 may be any structure that does not block the ultrasound generated by the ultrasonic oscillator 40. The mounting position of the vibrator 41 is most preferably the bottom surface, but may be configured to be mounted on the side surface of the washing tub 10. A plurality of vibrators 41 may be mounted on the bottom surface of the washing tub 10 and may be formed inside a separate closed case. When a high-frequency current is applied by the control unit 4, the vibrator vibrates the vibrator 41 and vibrates the cleaning liquid, so that the mold is cleaned.

A drain valve 5 connected to the washing tank 10 through a pipe is installed at one side of the main body 1. The ball valve (5) is connected to an external drainage path to discharge the cleaning liquid stored in the cleaning tank (10) to the outside. A cleaning liquid supply line 6 for supplying a cleaning liquid to the cleaning tank 10 is provided around the cleaning tank 10 of the main body 1. [ One end of the supply line 6 is located inside the cleaning tank 10 and the other end is connected to a separate cleaning liquid storage tank provided inside the main body 1 or an additional supply valve formed on the outer peripheral surface of the main body 1, The cleaning liquid may be supplied through the supply valve. The supply line 6 may be connected to the drain valve 5. In this case, a three-way valve is connected to the drain valve 5 and a three-way valve forms a flow path so that the drain valve 5 is connected to the supply line 6 when the cleaning liquid is supplied through the drain valve 5, When the washing liquid is drained through the drain valve 5, the drain valve 5 forms a flow path so as to be connected to the drain line.

The shelf 20 is provided with a mounting portion 21 which is formed in a flat plate shape so as to mount a cleaning object such as a metal mold 9 and a mounting portion 21 which protrudes from both ends of the mounting portion 21, And a bent mounting portion 22. The loading part 21 may have a mesh structure in a part of the area, or may have a mesh structure in its entirety.

The electrode unit 30 includes a transverse member 31 extending in a bar shape extending over the upper end of the shelf 20, an electrode shaft 32 mounted on the transverse member 31, And an electrode 33 provided at the end of the shaft 32. And an electrode connection part 35 connected to the positive electrode is provided at one end of the electrode shaft 32. The electrode connection part (35) is electrically connected to the electrode (33). In the intermediate region of the electrode shaft 32, a flexible shaft 34 made of a flexible material and capable of being plastically deformed is provided. The flexible shaft 34 may be made of a material capable of plastic deformation or a structure having a plurality of nodes connected to each other and capable of plastic deformation. And the end of the electrode shaft 32 is branched so that two or more electrodes are connected. The flexible shaft 34 can be applied to the entire electrode shaft 32, or to a part thereof. The flexible shaft 34 may be formed at the upper end of the electrode shaft 32 or may be formed at the lower end of the branched shaft 34. It is possible to adjust the direction in which each electrode 32 faces when the flexible shaft 34 is provided at the branched lower end portion. A plurality of fixing holes are formed in the transverse member 31 to fix the electrode shaft 32 and the number and position of the electrode shaft 32 can be adjusted according to the position and shape of the mold. The electrode shaft 32 may be screwed to the fixing hole of the transverse member 31, but it is preferable that the electrode shaft 32 is fixed to the electrode unit 30 by fastening the female screw as shown in FIG. 5 .

The main body 1 is provided on the front side thereof with an electrode line connecting portion 7 which is controlled through the control portion 4 and connected to the IGBT rectifier 50. The electrode line inserted into the positive electrode of the electrode line connection part 7 is connected to the electrode connection part 35 of the electrode part 30 and the negative electrode line is connected to the mounting part 22 of the shelf 20, Thereby causing an electrolysis reaction to occur.

The IGBT rectifier 50 mounted inside the main body 1 is a rectifying device by PWM control using a high-frequency switching method using an IGBT element. IGBT rectifiers generate more than 25,000 output pulses per second compared to conventional SCR rectifiers and can significantly reduce high current and low current deviations. In addition, compared with conventional SCR rectifiers, the circuit configuration is not influenced by the AC input waveform, so stable control independent cooling is possible, and component failures are small and high-speed response is possible. In addition, it is possible to reduce energy consumption with high efficiency (88 ~ 95%), low ripple (output room load condition: 2% or less), large capacity (120kW or more) , It is possible to maintain the uniformity of the paint by decreasing the current deviation according to the application of the high density energy.

6, after the object to be cleaned is placed on the top of the shelf 20, the shelf 20 is inserted into the cleaning tank 10 containing the cleaning liquid. The electrode unit 30 is mounted on the upper end of the washing tub 10 such that the electrode 33 is positioned at a predetermined distance from the shelf 20 on which the mold 9 is placed. At this time, the installation position of the electrode shaft 32 provided on the transverse member 31 is adjusted, or the flexible shaft 34 is bent so that electrolysis is uniformly performed over the entire surface of the metal mold 9. The flexible shaft 34 is bent at a portion where the foreign matter is likely to be caught, such as the inner edge portion of the metal mold 9, and the electrode 33 is positioned so as to intensively electrolytically decompose the inner edge portion of the metal mold, Thereby improving the cleaning effect of the adhered foreign matter.

The positive electrode line connected to the electrode line connection portion 7 is connected to the electrode connection portion 35 and the negative electrode line is connected to the mounting portion 22 after the electrode portion 30 is installed.

Thereafter, ultrasonic vibration is generated in the cleaning tank 10 containing the cleaning liquid, and power is supplied to perform electrolysis. The process of separating foreign matter from the mold is as follows. When the cleaning liquid is permeated between the foreign matter attached to the mold and the mold, and the cleaning liquid is electrolyzed on the metal surface and electrolytic gas is generated, the cleaning liquid penetrates into the narrow gap between the mold and the foreign substance, At this time, when it is converted into gas, the volume expands to several hundred times and pushes out the foreign material. In addition, the ultrasonic wave acts on the surface to promote the separation of the foreign matter.

Since three different kinds of elements are simultaneously generated from the surface of the mold object, it is possible to cope with various pollutants and improve the cleaning effect of the mold.

The cleaning liquid used for cleaning the mold is a cleaning liquid suitable for electrolytic cleaning, and an alkaline aqueous cleaning liquid is mainly used. The cleaning liquid is suitable for washing of iron, steel, stainless steel, nickel, ear rapidity and the like. The cleaning liquid can be used repeatedly, and the life of the cleaning liquid is long, which is economical and environmentally friendly. The cleaning liquid is preferably composed of an electrolyte having excellent electrical conductivity and a chelating agent capable of blocking metal ions, a surfactant having a strong penetration ability and preventing an adherence of a foreign matter and preventing mist generation, and a chelating agent capable of blocking metal ions.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

1: Body
10: Washing tank
20: Shelf
30:
40: ultrasonic oscillator
50: IGBT rectifier

Claims

A washing tub 10 mounted on the upper surface of the main body 1;
A shelf (20) for storing the article to be cleaned by being placed inside the cleaning tank;
An electrode unit 30 having an electrode shaft 32 which is placed on the upper end of the shelf 20 and is capable of being plastically deformed by the washing tank 10; And
An ultrasonic oscillator 40 installed in the main body 1 to generate ultrasonic waves to be supplied to the cleaning liquid contained in the cleaning tank 10; The ultrasonic mold cleaner comprising:

The electrode part (30)
A transverse member (31) having a plurality of fixing holes;
An electrode shaft (32) having a flexible shaft (34) capable of being selectively installed in the fixing hole of the transverse member (31) and capable of plastic deformation at least in a section of the intermediate region; And
And an electrode (33) connected to an end of the electrode shaft (32).

The variable type ultrasonic mold cleaner according to claim 2, wherein one end of the electrode shaft (32) is branched into a plurality of shafts, and the flexible shaft (34) is provided in a branched area.

The method according to claim 1,
Further comprising an IGBT rectifier (50) generating an output wave of 25,000 or more in one second and generating power to be supplied to the electrode unit (30) and the shelf (20).