An ice blasting machine comprising a crusher for crushing water ice; and a crusher-activation mechanism to activate or deactivate the crusher, wherein the crusher is activated to operate in water ice mode and wherein the crusher is deactivated to operate in dry ice mode. An ice-blasting method including activating a crusher to crush water ice when operating in water ice mode and deactivating the crusher when operating in dry ice mode.

The present disclosure relates to abrasive material delivery systems for liquid jet cutting systems. The abrasive material delivery systems can include a valve configured to adjust an inflow of abrasive material into the abrasive material delivery system from a source of abrasive material. The systems can include a chamber downstream of the valve and configured to receive the inflow of abrasive material from the valve. The systems can include a metering component configured to control an outflow of abrasive from the chamber to a cutting head of the liquid jet cutting system. In some embodiments, the systems include a sensor configured to monitor movement of a top surface of a portion of abrasive material within the chamber as the top surface moves through the chamber; and a processing device operably connected to the sensor and configured to determine an abrasive flow rate through the metering component based on a speed of the top surface as monitored by the sensor.

Dry ice container for dry ice cleaning devices comprises the container for dry ice closed by the lid (2) on the upper side, and provided by the opening (3) for drawing out dry ice pellets on the lower side. The container (1) has the bottom (4) sloped towards the opening (3) for drawing out the pellets. The linear-movable member (5) is arranged in the chamber (6) at the bottom (4) of the container (1) transversely to the axis of the container (1). The member (5) has the shape of a gutter in which groups of separated openings (5a, 5b, 5c) are provided, to which at least one pellets plowing element (5d) is placed in the member (5). Each group of openings (5a, 5b, 5c) pertains to one opening (3) for drawing out the pellets.

An apparatus for outputting a solid material entrained in a fluid, the apparatus comprising a receptacle for receiving the solid material, an input for the fluid, an output for solid material, an auger for transporting the solid material from the receptacle to the output, a motor for driving the auger, wherein the motor comprises one or more cylinders each comprising a piston, a second input connected to the input so as to feed part of the fluid to the cylinders, where a cross section of a piston is at least 700 mm.sup.2 or wherein a drive transforming the reciprocating movement of each piston, relative to the cylinder, to rotation of the auger around the first axis, is configured to rotate the auger at least 20 degrees when a cylinder completes a cycle.

An apparatus is described which introduces cryogenic particles received from a source of particles, having a first pressure, into a moving transport fluid, having a second pressure, for ultimate delivery to a workpiece or target as particles entrained in a transport fluid flow which seals between the source of particles and the transport fluid flow.

An automatic sand abrasion device includes a shell, an integrated framework, a sand falling mechanism, a sand transport mechanism, a sand falling channel, a sample working frame and a circuit control cabinet, where the device adopts the transport belt and the second speed reduction motor to realize transportation of sand, and realizes that the weighed sand falls into the bottom of the abrasion device through the first speed reduction motor and the automatic weighing machine. The whole process can be automatically operated while parameters such as the operation time and the weight of abrasion sand are set, so that the detection efficiency for the abrasion resistance can be improved, and the labor cost is greatly reduced. The device is firm in structure and stable and reliable in work and improves the accuracy and efficiency of an experiment.

Essential constructive elements of the currently known machines and devices, which work by means of vacuum blasting, are improved in the surface cleaning and engraving machine that operates via a vacuum jet process in order to enable more effective cleaning of different surfaces, further applications and simplification of the handling of the machine or device. With the modifications and additions made, the application options of the machine or device are increased, the potential of clogging the suction hose is reduced to a minimum, the service life of the machine is extended and the efficiency and operating options of the blasting hood are improved. For this purpose, technical and design details of an already known machine are supplemented and improved; there are, for instance, a metering device (3), additions to the blasting hood (6) and measures to extend the service life of the machine by using rock impact films (31).

An ice blasting machine comprising a crusher for crushing water ice; and a crusher-activation mechanism to activate or deactivate the crusher, wherein the crusher is activated to operate in water ice mode and wherein the crusher is deactivated to operate in dry ice mode. An ice-blasting method including activating a crusher to crush water ice when operating in water ice mode and deactivating the crusher when operating in dry ice mode.

A cluster-tool assembly for abrasive flow machining a plurality of airfoils is disclosed. The cluster-tool assembly comprises an airfoil cluster, the airfoil cluster including a supporting rail and the plurality of airfoils spaced about the supporting rail, and a sacrificial tool unitarily formed with the airfoil cluster, the sacrificial tool including a body and a plurality of prongs extending from the body.

An appearance inspection apparatus is intended to reduce overdetection of a defect in an appearance inspection. The appearance inspection apparatus in the surface treatment system images an inspection target Wk by an imaging part and includes a replacement determination part which determines that a shot material needs replacement in an ejector when the difference between the brightness level of an inspection target region in a captured image and the brightness level of a reference region in a reference image is a predetermined threshold or more. Thus, the determination of the replacement of the shot material is executed within a range allowing effective reduction of overdetection by the appearance inspection apparatus and thereby the appearance inspection apparatus is capable of reducing overdetection of the defect.