Abstract: In a deburring device configured to remove burrs of the molded product through radiation of ultrasonic waves, a height of the storage tank is set to 1.25? mm when a wavelength of an ultrasonic wave is set to ? mm. A frequency range of ultrasonic wave radiating means arranged on a bottom side of the washing water storage tank is set to from 18 KHz to 28 KHz, and power density is set to 2 W/cm2 or higher. Further, there is arranged oscillating means configured to allow the molded product immersed in the washing water to vertically move with a stroke of at least 1/2? mm in a vertical direction. Further, an amount of dissolved oxygen in the washing water is set to 1 mg/litter or less, and a water temperature of the deburring washing water is set to from 4° C. to 8° C.

Abstract: An object of the present invention is to efficiently perform a series of processing including washing in which, for example, different types of clothes or a large volume of clothes etc. are washed and thereafter arranged in order. The clothes etc. are sortably stored in a washing basket (A) for storing the clothes etc. hung on hangers by hanging them vertically, a washing basket (B) for storing the clothes etc. hung on hangers by stacking them horizontally, and a washing basket (C) for storing the clothes etc. by folding them up and stacking them on each other. Pre-processing is performed such that after these washing baskets have beet charged into a pre-processing chamber (1) and the pre-processing chamber (1) has been evacuated to remove gases such as air contained in clearances in the clothes etc., deaerated washing fluid is introduced into the pre-processing chamber (1) to immerse the clothes etc. in the washing fluid.

Abstract: An object of the present invention is to efficiently perform a series of processing including washing in which, for example, different types of clothes or a large volume of clothes etc. are washed and threreafter arranged in order. The clothes etc. are sortably stored in a washing basket (A) for storing the clothes etc, hung on hangers by hanging them vertically, a washing basket (B) for storing the clothes etc. hung on hangers by stacking them horizontally, and a washing basket (C) for storing the clothes etc. by folding them up and stacking them on each other. Pre-processing is performed such that after these washing baskets have beet charged into a pre-processing chamber (1) and the pre-processing chamber (1) has been evacuated to remove gases such as air contained in clearances in the clothes etc., deaerated washing fluid is introduced into the pre-processing chamber (1) to immerse the clothes etc. in the washing fluid.

Abstract: An ultrasonic cleaning tank with an ultrasonic vibrator mounted on its bottom is supplied with an aqueous cleaning solution which has been deaerated to a predetermined dissolved oxygen content ranging from 0.01 to 5 ppm. A workpiece to be ultrasonically cleaned is then immersed in the cleaning solution. Thereafter, the ultrasonic vibrator radiates ultrasonic energy into the cleaning solution to remove foreign matter and burrs off the workpiece.

Abstract: A workpiece to be ground is immersed in a processing solution with abrasive grains suspended therein. The processing solution is contained in an ultrasonic processing tank equipped with an ultrasonic vibrator. Ultrasonic energy is radiated from said ultrasonic vibrator into said processing solution to ground surfaces of the workpiece. The processing solution is drawn from the ultrasonic processing tank, cooled to a temperature lower than a boiling point thereof, deaerated, and then returned to the ultrasonic processing tank.

Abstract: An ultrasonic cleaning apparatus has an ultrasonic vibrator mounted in a cleaning tank on a bottom thereof for radiating ultrasonic energy, and a deaerated cleaning solution stored in the cleaning tank and having a surface level at a position substantially corresponding to an integral multiple of half the wavelength of the ultrasonic energy radiated by the ultrasonic vibrator. A web-shaped or filamentary elongate metal workpiece, which is shaped to pass the ultrasonic energy easily therethrough, is horizontally moved in the cleaning solution at a position spaced from the surface level by a distance substantially equal to a quarter of the wavelength of the ultrasonic energy radiated by the ultrasonic vibrator. An electrode, which is shaped to pass the ultrasonic energy easily therethrough, is disposed in the cleaning solution and extending parallel to the workpiece. A voltage is applied between the electrode and the workpiece while the workpiece is being moved in the cleaning solution.

Abstract: An ultrasonic vibrator has a single natural frequency for radiating ultrasonic energy into a cleaning solution to clean and deburr workpieces that are immersed in the cleaning solution. A plurality of oscillating signals having respective different frequencies which are integral multiples of the natural frequency of the ultrasonic vibrator are generated, and successively outputted for respective periods of time thereby to generate a composite signal which is composed of a time series of the oscillating signals. The composite signal is applied as a drive signal to the ultrasonic oscillator to oscillate the ultrasonic vibrator. The oscillating signals may be outputted successively for said respective periods of time or intermittently with quiescent periods inserted therebetween.

Abstract: An ultrasonic cleaning tank has a tank body for accommodating a cleaning solution, an ultrasonic vibrator housed in a sealing container mounted on a bottom wall of the tank body, and an openable lid for sealingly closing the tank body when a workpiece to be cleaned is immersed in the cleaning solution in the tank body. The cleaning solution is supplied to fill up an entire space in the ultrasonic cleaning tank when the tank body is closed by the lid. A pressurizing system for pressuring the cleaning solution which fills the ultrasonic cleaning tank includes a cleaning solution sealing tank for accommodating the cleaning solution independently of the ultrasonic cleaning tank, a liquid conduit interconnecting the ultrasonic cleaning tank and the cleaning solution sealing tank, and a pressurizing device for pressurizing the cleaning solution in the cleaning solution sealing tank to transmit the pressure applied to the cleaning solution through the liquid conduit to the ultrasonic cleaning tank.

Abstract: A cleaning apparatus for ultrasonically cleaning workpieces has an array of juxtaposed tanks including an ultrasonic cleaning tank, and a plurality of supports associated with the respective tanks for vertical movement between lower positions in the tanks and upper positions above the tanks. The tanks are separably joined so that they are selectively replaceable with other tanks. The supports support workpieces processed in the tanks, respectively, for sliding movement toward adjacent ones of the tanks. A lifting and lowering mechanism simultaneously lowers the supports into the tanks, respectively, to allow the workpieces to be processed in the tanks, and simultaneously lifts the supports from the lower positions in the tanks up to the upper positions above the tanks after the workpieces supported on the supports lowered in the tanks are processed in the tanks.

Abstract: Plate-like workpieces such as thin ceramic plates which are ultrasonically cleaned are housed in a tray having an air-permeable bottom plate and a plurality of air-impermeable sidewall plates extending from peripheral edges of the bottom plate. To dry the cleaned workpieces, the tray is placed in a drying tank and supported on a support base on the bottom of the drying tank at an inclined attitude. The drying tank is combined with a hot-air duct which is detachably coupled to respective edges of the sidewall plates of the tray when the tray is supported on the support base. The hot-air duct supplies hot air into an interior space of the tray which is surrounded by the sidewall plates. A suction duct is coupled to the bottom plate of the tray supported on the support base and draws hot air supplied from the hot-air duct from within the interior space through the bottom plate.

Abstract: A workpiece to be ground is immersed in a processing solution with abrasive grains suspended therein. The processing solution is contained in an ultrasonic processing tank equipped with an ultrasonic vibrator. Ultrasonic energy is radiated from said ultrasonic vibrator into said processing solution to ground surfaces of the workpiece. The processing solution is drawn from the ultrasonic processing tank, cooled to a temperature lower than a boiling point thereof, deaerated, and then returned to the ultrasonic processing tank.

Abstract: A cleaning solution is supplied from a solution reservoir to a workpiece held in a cleaning station through a cleaning solution supply passage extending from the solution reservoir to the solution reservoir. When the cleaning solution is supplied to the workpiece, ultrasonic energy is radiated into the cleaning solution to cavitate the cleaning solution for cleaning and deburring the workpiece. A deaerating device for deaerating the cleaning solution to be supplied to the workpiece has a casing disposed in the cleaning solution supply passage for passing the cleaning solution therethrough, gas separating membranes disposed in the casing and having passages defined therein for passage of the cleaning solution therethrough, and an evacuating unit for evacuating the casing to deaerate the cleaning solution flowing through the passages by drawing a gas contained in the cleaning solution through walls of the gas separating membranes.

Abstract: A workpiece immersed in a cleaning solution in a cleaning tank is cleaned by ultrasonic energy radiated by an ultrasonic vibrator disposed in a sealed container in the cleaning tank. A fluid such as a coolant gas or liquid is introduced under pressure into the sealed container to pressurize the interior space of the sealed container to a pressure which is substantially equal to a static pressure that is applied to the cleaning solution in the cleaning tank.

Abstract: Disclosed herein is a process for the removal of an oil in an aqueous liquid wherein after cleaning a workpiece having oil thereon with an aqueous solution of a detergent, the oil contained in the aqueous solution is removed from the aqueous solution. The oil-containing aqueous solution is heated to a predetermined temperature, at which the detergent component does not evaporate, to unite droplets of the oil with each other, thereby making the size of the oil droplets greater, and the oil droplets which have grown greater in size are then separated and removed from the aqueous solution. According to this process, an oil emulsified in the aqueous detergent solution can be separated and removed from the aqueous solution with ease to keep the detergency of the detergent over a long period of time.

Abstract: A workpiece is immersed in a cleaning solution in a cleaning tank. The cleaning tank has an ultrasonic vibrator disposed on its bottom for radiating ultrasonic energy into the cleaning solution to remove foreign matter or burrs off the workpiece. A deaerating device is connected to the cleaning tank for supplying a deaerated cleaning solution to the cleaning tank. The deaerating device comprises a sealed tank for being supplied with the cleaning solution from the cleaning tank. A vacuum pump or ejector is connected to the sealed tank to evacuate the sealed tank to release a dissolved gas from the cleaning solution which is supplied to the sealed tank and exposed to an evacuated space in the sealed tank.

Abstract: Disclosed is a spray type ultrasonic washing apparatus using a coaxial nozzle structure which is composed of inner and outer hollow frustums for supplying deaerated washing liquid in the annular passage delimited by the outer and inner frustums and supplying nondeaerated washing liquid in the inner frustum, thus permitting deaerated washing liquid to be enclosed by nondeaerated washing liquid in spraying against work to be washed, thereby isolating deaerated washing liquid from the surrounding atmosphere to prevent invasion of air into the deaerated washing liquid. Thus, cavitation can be formed effectively in the deaerated washing liquid, and washing can be performed at an increased efficiency.

Abstract: A swivel joint for the interconnection between pipes on an upper structure side and a lower structure side of a construction equipment of the upper structure revolving type. The swivel joint has formed therein a fluid passage for fuel supply oil to be supplied from a fuel oil tank on the lower structure side to an engine on the upper structure side and another fluid passage for return oil to be returned from the engine to the tank. The fluid passages are formed in an isolated condition from an other fluid passage so that fuel supply oil or return oil may not be mixed with any other fluid within the swivel joint or may not leak to the outer side of the swivel joint.Another swivel joint is also disclosed wherein a body is divided in an axial direction into two parts.

Abstract: A swivel joint for the interconnection between pipes on an upper structure side and a lower structure side of a construction equipment of the upper structure revolving type. The swivel joint has formed therein a fluid passage for fuel supply oil to be supplied from a fuel oil tank on the lower structure side to an engine on the upper structure side and another fluid passage for return oil to be returned from the engine to the tank. The fluid passages are formed in an isolated condition from any other fluid passage so that fuel supply oil or return oil may not be mixed with any other fluid within the swivel joint or may not leak to the outer side of the swivel joint. Another swivel joint is also disclosed wherein a body is divided in an axial direction into two parts.

Abstract: Disclosed is an improvement of ultrasonic washing apparatus comprising at least one washing vessel, an ultrasonic vibrator for radiating ultrasonic wave into the washing bath, an oscillator for operating the ultrasonic vibrator and degassing means for removing dissolved air and other gases from the washing liquid, thereby enhancing cavitation in the washing bath when the ultrasonic wave is radiated therein, said degassing means including gas separating means and barrier means for preventing surrounding air from dissolving into the washing liquid while it is degassed. Thanks to deaeration in the washing bath cavitation can be used to its full extent in removing soil from a soiled object in the washing bath.

Abstract: Disclosed is an improvement of ultrasonic cleaning system equipped with degassing means or boiling vessel to remove gases from cleaning liquid for activating the formation of cavitation in the cleaning bath. The ultrasonic cleaning system is improved according to the present invention in that the boiling vessel is used to supply the degassed liquid to the cleaning vessel to form a high-temperature zone on the cleaning bath, and that a circulation conduit is provided to supply the cleaning liquid from the high-temperature zone to the bottom of the cleaning vessel. The improved structure permits the creation of a high-temperature zone and a low-temperature or cleaning zone in one cleaning vessel, thereby preventing the dissolution of surrounding gases into the cleaning liquid, and at the same time, subjecting objects to ultrasonic-cleaning at a controlled temperature which is appropriate for ultrasonic cleaning, thereby improving the cleaning effect, and hence the cleaning efficiency.