Abstract: An ice blasting apparatus comprises: an ice making device operating a cutting blade to shave off ice freezing on an inner wall of the freezing casing and continuously discharges the shaved ice as flake-shaped ice pellets; an ice mixing tank mixing the ice pellets and water and maintaining the resulting ice slurry at a predetermined concentration with a concentration sensor; and a blast gun blasting the ice slurry. A trimming method is performed on a film insert molding with a film material adhering to a face of a resin molding and extending beyond a periphery edge of the resin molding. A blast gun facing the face with the film adhering to it blasts ice slurry of a required concentration toward the vicinity of the periphery edge of the resin molding to remove the unnecessary portion of the film material extending beyond the periphery edge of the resin molding.

Abstract: A method of a blast process for a junction part between a large-diameter main bore tubularly drilled through an article and a small-diameter branch bore branching off at an angle from the main bore inside the article. A pillar-shaped rod is inserted from a first open end of the main bore to a point close to the junction part before a leading end of the rod blocks the branch bore. A wet slurry made of a mixture of abrasives and water is jetted from a second open end of the main bore into the main bore by use of a squirt gun. The blast of wet slurry is collided with the leading end of the rod and redirected toward the branch bore to drive the abrasives against the junction part located inside the article for removal of burrs therefrom the junction part.

Abstract: Ice grains of uniform grain size are produced through the change of state of supercooled water and the ice grains are mixed into cold water for obtaining an ice slurry of proper concentration. The ice slurry is injected from an injection means to the surface of a workpiece. As the ice grains are fine and uniform and they are injected with water in the state of ice slurry of stable concentration, a surface processing of a soft workpiece susceptible to damage can be performed without causing damage, and the cleaning of the processed surface is performed concurrently with the surface processing, eliminating the necessity of after cleaning. The apparatus is compact and the initial cost is low. The energy needed for preparing the ice slurry is small.

Abstract: A carrying apparatus comprising an endless roller chain belt that moves on a circular track and includes a plurality of fixture plates. Each fixture plate has several interrupted slot lines each of which comprises vertically elongate lower, middle and upper slot sections, and a work holding device formed with a resilient coil section intermediate a fixing section at an upper end and a work holding section at a lower end. The work holding device being engaged with the slot line such that the coil section seats within the middle slot section and the fixing and work holding sections extend respectively through the upper and lower slot sections to hold a workpiece between the holding section and an edge of the fixture plate. The middle slot section being skewed at an inclined angle with the upper and lower slot section having vertical axes parallel to and spaced one from the other.

Abstract: A method for dressing a grinding wheel by providing a slurry of liquid and solid particles wherein the particle size is smaller than grain size of the grinding wheel and the particles are free of sharp edges, and blasting the slurry at low pressure through a blasting nozzle onto a surface of the grinding wheel to remove foreign material on the grinding wheel by impact and by cleaning action of the blasted stream.

Abstract: A solder coating apparatus for coating lead sections of a lead frame, including a liquid solder bath and a coating block having a first slit-like passage therethrough for permitting a lead frame to pass through the block and a second passage of enlarged cross section communicating with and extending along the first passage for permitting the lead frame package to pass through the block. A pair of liquid solder supply slits are formed in the block and communicates with the first passage along the length thereof and on opposite sides of the second passage. A pump at least partially immersed in the liquid solder bath provides for positive supply of liquid solder to and through the slits into the first passage to coat the lead sections. A conduit connects between the delivery side of the pump and the liquid solder supply slits.

Abstract: A slurry supplying device by which a uniformly mixed slurry can be supplied to a blasting gun in a pressure-type wet blasting machine. The slurry supplying device comprises a substantially closed vessel which contains the slurry and has a conical section in at least one part of the vessel. A conical stop valve is freely movable up and down to close the bottom of the slurry settling section by sealingly fitting its conical edge on the conical section of the vessel. An air duct supplies low pressure air for agitating the slurry at a lower part of the closed vessel by raising the stop valve body. An air duct is provided for supplying highly pressurized air into the closed vessel for pressurizing the slurry. A slurry supply pipe is provided for supplying the pressurized slurry to the blasting gun. A pressure relief valve is mounted on the top plate of the vessel for maintaining a maximum air pressure in the upper portion of the vessel.

Abstract: A method and apparatus for removing clogging material from between abrasive grains of a grinding wheel. A pressurized blasting fluid is supplied to a blasting gun, which in turn sucks an abrasive particle-liquid slurry into the gun. The slurry is entraining in the stream of blasting fluid, causing the liquid to be broken down into mist particles, and the resultant stream is discharged against the surface of the grinding wheel at a pressure in the range of 2.0 to 3.5 kg/cm.sup.2.

Abstract: A method and apparatus for removing clogging material from between abrasive grains of a grinding wheel. A pressurized blasting fluid is supplied to a blasting gun, which in turn sucks an abrasive particle-liquid slurry into the gun. The slurry is entraining in the stream of blasting fluid, causing the liquid to be broken down into mist particles, and the resultant stream is discharged against the surface of the grinding wheel at a pressure in the range of 2.0 to 3.5 kg/cm.sup.2.

Abstract: A pair of solder coating rolls are disposed horizontally adjacent one another for rotation about parallel horizontal axes, and are spaced apart to define a narrow vertically-oriented nip therebetween for accommodating a lead frame therein. Lower parts of the rolls contact a solder bath, and counter rotation of the rolls carries the solder upwardly on the periphery of the rolls to create a small pool of solder at the upper end of the nip. The lead frame is driven vertically upwardly through the nip, which nip has a minimal dimension greater than the lead frame thickness. The lead frame is driven vertically upwardly at a linear speed which is different from, and preferably slower than, the peripheral speed fo the solder coating rolls. This enables preheating of the surface of the lead frame due to its longer exposure to and contact with the hot solder which coats the periphery of the rolls, thereby improving the wetability of the lead frame surface.

Abstract: A roller-type solder coating device for applying a coating of liquid solder to a workpiece. The device has a solder bath tank, a coating roller, and a nozzle connected to a pumping chamber provided in the tank to provide a flow of the solder bath to the coating roller. A trough is positioned underneath the coating roller and similarly connected to the nozzle so as to prevent direct re-entry of the solder delivered from the nozzle into the solder bath. The tank may be sealed and inert gas introduced therein to prevent oxidation of the solder contained within the tank. A second coating roller may be provided so as to permit simultaneous coating of opposite sides of a workpiece during its passage between the coating rollers.

Abstract: A blasting apparatus for cleaning and deburring workpieces having a housing defining a blasting chamber therein. A rotary drum within the chamber is supported for rotation about a horizontal axis. A drive effects rotation of the drum through a plurality of angular steps during each revolution. The drum has a plurality of circumferentially spaced compartments opening radially outwardly thereof. A workpiece holder is positioned within each compartment. A housing opening cooperates with the drum, when stationary, to define a station for permitting loading and unloading of workpieces with respect to the holder associated with one compartment. A gun arrangement effects deburring and cleaning of workpieces mounted on the drum. The gun arrangement includes a plurality of nozzles mounted circumferentially so that each nozzle cooperates with a selected compartment and moves axially therealong for treating the workpiece.

Abstract: A soldering machine for simultaneously applying liquid solder to opposite sides of the leads of a lead frame having I.C. devices thereon. The machine has sidewardly spaced rolls which define a vertically extending narrow nip therebetween through which the lead frame passes. A solder bath is disposed below the rolls so that the lower portions of the rolls dip into the bath and carry a solder film to the nip for application to opposite sides of the leads. A passage extends upwardly in isolation from the bath for permitting the lead frame to be fed vertically through the nip.

Abstract: A soldering machine for simultaneously applying liquid solder to opposite sides of the leads of a lead frame having I.C. devices thereon. The machine has sidewardly spaced roller assemblies which define a vertically extending narrow nip therebetween through which the lead frame assemblies pass. A solder bath is disposed below the roller assemblies so that lower portions of the rollers dip into the bath and carry a solder film to the nip for application to opposite sides of the leads. A passage extends upwardly in isolation from the bath for permitting the lead frame to be fed vertically upwardly into and through the nip.

Abstract: A blasting nozzle structure for wet-blasting of an abrasive slurry, which structure includes a body having substantially parallel first and second passages for flow therethrough of pressurized air and abrasive slurry, respectively. A nozzle member extends longitudinally of the member and defines a longitudinally elongated but narrow slitlike opening which opens transversely from the slurry passage for permitting discharge of a thin curtainlike stream of abrasive material. An air nozzle member is also fixed to the body part and defines a narrow slitlike flow opening threrthrough, the latter extending transversely from the air passage through the slurry passage for directing a thin curtainlike jet of air into the slurry passage directly adjacent the upstream end of the main discharge slit.

Abstract: A lead frame finishing apparatus comprises a tool supporting base on which a plurality of lead frame finishing tools are provided. Two frames support a lead frame transfer unit which clamps the lead frames at their edges and has an adjustable. A linkage unit connects one of the frames to the tool supporting base and pivots the tool supporting base around a pin to correspond the effective width covered by the tools to the width between the two frames which support the lead frame transfer unit.

Abstract: A process and apparatus for improving the finishing of silicon wafers intended for use as a base plate of an I.C. device. After the wafer has been cut from a silicon crystal and initially ground, then a slurry of water and silicon carbide particles is blasted against the surface to create a mattelike satin finish. This surface is then lapped to provide a mirrorlike finish.To perform the method, the wafer is disposed in a cuplike fixture constructed of resilient material, which fixture defines a cylindrical recess which is of a diameter slightly greater than that of the wafer. The fixture has a support projecting upwardly from the bottom wall and defining an annular drainage passage therearound, which support has the wafer positioned thereon. The blasting media is ejected into the fixture to finish the surface on the wafer, and the slurry drains downwardly around the edge of the wafer into the annular drain passage, and then out through outlet openings which project radially through the wall of the fixture.

Abstract: Apparatus for sensing the condition of a slurry transport line in a wet blasting apparatus. Slurry transportation lines feed the blasting guns of a wet blasting machine. The blasting guns are carried by a gun supporting member by means of interposed resilient members for isolating each gun from the vibration of adjacent guns. A vibration sensor fixed on the nozzle of each gun provides an electric output signal to a measuring device related to the amount of vibration of the gun on which said sensor is mounted.

Abstract: A process for improving the finishing of silicon wafers intended for use as a base plate of an I.C. device. After the wafer has been cut from a silicon crystal and initially ground, then a slurry of water and silicon carbide particles is blasted against the surface to create a mattelike satin finish. This surface is then lapped to provide a mirrorlike finish.To perform the method, the wafer is disposed in a cuplike fixture constructed of resilient material, which fixture defines a cylindrical recess which is of a diameter slightly greater than that of the wafer. The fixture has a support projecting upwardly from the bottom wall and defining an annular drainage passage therearound, which support has the wafer positioned thereon. The blasting media is ejected into the fixture to finish the surface on the wafer, and the slurry drains downwardly around the edge of the wafer into the annular drain passage, and then out through outlet openings which project radially through the wall of the fixture.

Abstract: A guiding and transporting arrangement employs opposed guide rails which have longitudinally extending guide structure associated therewith for slidably accommodating a lead frame between the guide rails, which guide rails are slidably supported on transversely extending guide rods, and are drivingly coupled together by a threaded screw arrangement which can be driven to accurately move the guide rails inwardly and outwardly to adjust the spacing therebetween. A conveyor is disposed for cooperation with the guide rails and is disposed below the lead frames to drivingly displace the lead frames longitudinally along the guide rails.