A shaft sealing device switches a sealing state and an unsealing state of a fluid, with high sealing performance maintained, because no abrasion accompanies movement of a sealing material or a sealing member, enabling feeding a fluid at a predetermined flow rate, and adjusts the expanding rate of the sealing material with the quantity of an external electric signal and accordingly adjusts the contact face pressure to enable controlling the amount of leakage of the fluid highly precisely, so that it can be used for all applications. The shaft sealing device includes a shaft sealing body formed of a macromolecular material and made expansible or contractible, or deformable, through external electrostimuli applied to a shaft sealing portion disposed in a device body, and flow passages disposed in the shaft sealing portion for feeding the fluid leaked due to the expansion or contraction, or the deformation, of the shaft sealing body.

A one-handle valve cartridge has a low point of contact for installing the valve cartridge in a valve body. A retention nut bears down on the low point of contact to secure the valve cartridge in the valve body.

A substrate of a lab-on-a-chip system has two adjacent recesses, one serving as a flow channel and the other one being filled with an elastomer compound. In a first state, the elastomer compound and the substrate delimit the flow channel in a section. In a second state, the elastomer compound takes up the space in the recess in the substrate along a cross-section of the flow channel, thereby completely closing the flow channel. The substrate and the elastomer compound may be produced by injection molding techniques.

In a fluid control device, a check valve includes a first valve housing and a first diaphragm. The first diaphragm defines a first valve chamber and a second valve chamber. An exhaust valve includes a second valve housing and a second diaphragm. The second diaphragm defines a third valve chamber and a fourth valve chamber. The check valve is opened and closed by a difference in pressure between the first valve chamber and the second valve chamber. The exhaust valve is opened and closed by a difference in pressure between the third valve chamber and the fourth valve chamber.

The Invention provided is a hydraulic powered down hole reciprocating pump traveling valve component to provided lifting hydraulics on the down stroke using the derived motion and pressure of petroleum liquids and gasses, such as oil, water and natural gas and also utilizing the frictional traveling forces driven by the surface equipment. Designed to utilize the elements within the pumping apparatus to obtain the hydraulic power within and transfer the energy's force to the exposed bottom end of the pressure locked traveling ball valve adjacent within the ball valve containment cage, providing ultimate lifting power to open the ball valve on the initiation of the down stroke. The component consist of a Hollow Hydraulic Power Shaft, Hollow Pressure Motion House, and a Fluid Cavity Power Drag Plunger.

In the method and apparatus of the invention, the process point is taken into account when the condition and performance of a control valve are monitored. In the condition monitoring of the valve, process measurements are used in addition to measurements inside the valve in such a manner that the process measurements identify the operating point at which the valve operates, and the measurements inside the valve are observed at these operating points to detect changes and to determine the condition of the valve. According to an aspect of the invention, the variables representing the operating point of an industrial process are considered when changes in the friction load of the valve and/or the load factor of the actuator are observed.

In one implementation, a method for providing a fluid at a target pressure may include providing a fluid at a velocity to a supply line through a dispenser, measuring a pressure of the fluid flowing through the supply line, comparing the measured pressure with the target pressure, and adjusting the velocity based on the results of the comparison.

A switching valve contains a sleeve member, a plug member, and a damping spring. The sleeve member includes a watering segment, a spraying segment, a peripheral fence, a side fence, a channel, a first watering chamber, and a second watering chamber. The peripheral fence has a first valve seat, a second valve seat, and at least one set of inlet. The first valve seat has a conical first closing face and a plurality of stop blocks. The second valve seat has a conical second closing face. The plug member includes a first sealing portion, a second sealing portion, and guiding ribs. The first sealing portion has a first ring, and the second sealing portion has a second ring. Each guiding rib has a guide face, and between any two adjacent guiding ribs is defined a slot. The damping spring is mounted between the side fence and the plug member.

A stepper-motor gas valve control is disclosed that includes a main diaphragm in a chamber that controllably displaces a valve relative to an opening in response to changes in pressure, to adjust fuel flow through the valve. A servo-regulator diaphragm is provided to regulate flow to the main diaphragm, to thereby control the rate of fuel flow. A stepper motor is configured to move in a stepwise manner to displace the servo-regulator diaphragm, to control fluid flow to the main diaphragm. A controller mounted on the stepper-motor regulated gas valve control receives and converts an input control signal from a heating system to a reference value between 0 and 5 volts, and selects a corresponding motor step value. The control responsively moves the stepper-motor in a step wise manner to displace the servo-regulator diaphragm and thereby regulates the rate of fuel flow through the valve.

The invention allows securing greater discharge pressure and flow rate at high revolutions of an engine in order to secure lubrication and cooling, while reducing discharge pressure and flow rate at low and medium revolutions of the engine in order to improve efficiency. The invention includes a housing; a relief valve; a valve passage; a main discharge flow channel; a main relief flow channel; an auxiliary relief flow channel; a solenoid valve mounted on the auxiliary relief flow channel; and a spring. The solenoid valve is controlled so as to switch between communication and shut-off between the auxiliary relief flow channel and the large-diameter passage section in accordance with an increase or decrease in engine revolutions, and oil in the large-diameter passage section is discharged when the shut-off is implemented.

A valve assembly (10) is to be used in conjunction with a tubular member having an internal surface surrounding a passage into which the valve assembly is to be sealingly inserted. The valve assembly includes a tubular body (25) having a longitudinal passage and an outer surface to be located adjacent the internal surface. A seal (29) is mounted on the outer surface to engage the internal surface to sealingly connect the tubular body with the tubular member. A movable valve member (33) is movable between an open position providing for the flow of water from an upstream end to a downstream end of the passage of the tubular body and a closed position closing the passage. Resilient means, such as a spring (34) urges the valve member to the closed position. The resilient means is configured to provide for displacement of the valve member toward the open position when pressure beyond a predetermined pressure is applied upon the movable valve member.

A drain valve device includes a base and a control unit removably disposed in the base. The control unit includes a valve and a resilient component positioned between the valve and the base. The drain valve device opens automatically as soon as water entering the base exceeds a predetermined level. The drain valve device shuts automatically as soon as water entering the base is less than a predetermined level. The drain valve device has advantages, namely simple structure, convenient of use, prevention of intrusion of odor and pests, easy to clean, and unlikely to get clogged.

In one featured embodiment, a spring assembly for a valve comprises a spring, a spring seat including a cup-shaped portion for seating one end of the spring, and a ball received within a recess formed within the cup-shaped portion of the spring seat. The ball is defined by a ball diameter. A disc prevents the ball from contacting a piston. The disc is defined by an outer diameter and includes a center opening defined by an inner diameter. A ratio of the inner diameter to the ball diameter is between 0.60 and 0.65.

To provide an opening degree detection device for an automatically operated valve which is easily assembled into an automatically operated valve, makes it easy to ensure detection accuracy at the time of assembling the opening degree detection device, and is easily applicable to an existing automatically operated valve. The opening degree detection device includes: a base plate 4 which is detachably mounted on an automatically operated valve 2; a displacement sensor 5; and a target 6 having an inclined detection surface 6a which is detected by the displacement sensor 5. The target 6 is fixed to the base plate 4. The displacement sensor 5 is supported on a valve stem 14 by way of a sensor support member 21, and the sensor support member 21 is supported on the base plate 4 by way of a guide means.

A valve system oriented for an irrigation system which is activated by a control unit is disclosed. The system comprises a solenoid switch and a manual switch, wherein an electrical wire extends from the valve to the control unit. The manual switch operates as a hand handling rotating lever; another use of manual switch is to serve as a means to force close the solenoid valve's outlet opening so as to provide a mechanism responsive to preventing automatic opening of solenoid valve controlled by control unit.

A valve operating device includes a mounting for attachment to a vehicle and an elongate arm, the free end of which is only moveable across the underlying ground. The joints of the arm pivot around vertical axes and the arm is locked into a desired orientation by a brake at each joint. A valve turning machine is at the free end of the arm. The brakes are engaged and released by a control on the valve turning machine.

A fuel transfer system for an aircraft includes an upper tank, a lower tank, a fuel transfer line connecting the upper tank to the lower tank, an upper fuel transfer line outlet in the lower tank, a lower fuel transfer line outlet in the lower tank, an upper float valve associated with the upper fuel transfer line outlet, and a lower float valve associated with the lower fuel transfer line outlet. The upper fuel transfer line outlet, which is in the lower tank, is in fluid communication with the upper tank. The lower fuel transfer line outlet, which is located in the lower tank, is in fluid communication with the upper tank.

A valve box platform is disclosed. The valve box platform may include a peripheral wall having a receiving surface for receiving a valve box. A first recess may be positioned within the peripheral wall. The first recess may include a knockout portion selectively disclosed therein. The peripheral wall may also include a U-shaped recess having a rounded receiving portion with the U-shaped recess being aligned with the first recess.

A method is presented for making a composite material from strips comprising longitudinal fibers and a binder or resin, which material comprises a number of layer assemblies one on top of the other. Each layer assembly comprises m sets (with m at least 2) of parallel strips each extending in a different direction, Each layer assembly is manufactured by successive steps of depositing groups of parallel strips according to a well defined pattern (without longitudinally interweaving strips with previously deposited strips). Before completing a layer assembly, with the exception of the last layer assembly, by depositing its last group of parallel strips, the first group of parallel strips of the following layer assembly is already deposited. A composite material manufactured with such a method is presented too.

An elastic longitudinal net (1) for longitudinal food products, especially cold meat products, is formed as a sleeve having at least one longitudinal main warp (21) of a tightening chain weave having at least one substantially inextensible thread (213, 214), and at least one weft (3) having at least one elastic fiber and circumferential sections (31), the ends of which are interweaved substantially perpendicularly between the substantially inextensible fiber and longitudinal sections (32) existing between neighboring circumferential sections (31) and running in a concurrent manner relative to and weaved with at least one main warp (21). The longitudinal sections are interweaved through at least one main warp (21) substantially perpendicularly relative to its longitudinal axis, passing through loops (215, 216) of the at least one substantially inextensible thread (213, 214) of the main warp, forming a serpentine run having at least two external loops (321).

A medical balloon with a variable diameter that is reinforced with continuous fibers woven to form a fabric with a varying number of layers and fiber densities. Portions of the balloon having a relatively smaller diameter are reinforced with a fabric having a reduced fiber density and an increased number of layers to facilitate the placement of the layers. The fabric also includes a braiding pattern that facilitates the transition from a single layer fabric to a multiple layer fabric. Also described is a manufacturing method for the braiding and layering.

A vascular device is provided that includes a tubular structure and an occluding structure. The tubular structure has inner and outer layers, with the occluding structure located between the inner and outer layers. Each of the inner and outer layers may define a different pick count, and the tubular structure may include a leading edge at a transition between the pick counts. The leading edge may be disposed at the distal end of the vascular device when the device is deployed from a delivery device. Furthermore, the occluding structure may have first and second layers formed by the inversion or eversion of the occluding structure and the subsequent coupling of its free ends to form a continuous structure. Thus, any loose ends may be sealed to minimize unraveling and/or shifting of the occluding structure within the tubular structure. A method of making the vascular device is also provided.

A composite material comprising a plurality of fiber tape strips woven or braided together. Each of the plurality of fiber tape strips is made of a single layer of unidirectional fibers. The fibers are at least partially embedded in a thermoplastic matrix. A tubular composite part is made from this composite material and of an internal film. A method of manufacturing the composite material comprises weaving or braiding the fiber tape strips, especially in the form of a tube. A method of manufacturing a composite part comprises pressurizing the film inside the tube while heating both the tube and the film up to their forming temperature so as to bond the film to the woven fiber tape strips.

A braider comprises a plurality of horngears. The horngears can be arranged for forming at least two closed paths for braiding. Each horngear has a driving gear and a hornplate. Each horngear can be selectably operated in a first mode, to rotate with the driving gear, and in a second mode, in which the driving gear rotates, but the hornplate does not. Bobbin carriers are positioned on some of the horngears. A track is configurable in: a first flat braiding mode with the carriers arranged on the horngears, so that there is one or more separate closed path for forming a first flat braid configuration; and a second flat braiding mode for forming a second flat braid configuration different from the first flat braid configuration. A switch is provided for changing a configuration of the track between the first and second flat braiding modes.

A method of fabricating a mechanical member for aircraft, including a plurality of operations of braiding and depositing layers of braided reinforcing fibers on a mandrel (11) by using braiding machine. Each operation comprises braiding a braided layer and depositing it by moving the mandrel (11) along a central axis of the braiding machine. Each of the various superposed braided layers comprises both longitudinal fibers (12, 12G) that are parallel to a main direction of the mandrel (11), and interlacing fibers that are inclined. At least one operation is configured to form and deposit a braided layer having, in at least one cross-section of the member, a density of longitudinal fibers that differs depending on whether consideration is given to one angular region (S1) or another angular region (S2) of the same extent around the center of gravity (G) of the mandrel (11) in the section under consideration.

Methods of forming a structure for treating a vessel include providing a mandrel and braiding a plurality of filaments around the mandrel. The mandrel may include a strand having a longitudinal axis and a plurality of balls coupled to the strand along the longitudinal axis. Pairs of the plurality of balls may be spaced along the longitudinal axis. Braiding the plurality of filaments around the mandrel may include, during braiding, forming a plurality of bulbs around the plurality of balls and forming necks between pairs of the plurality of balls. The methods may include, after braiding the plurality of filaments, heat treating (e.g., shape setting) the plurality of filaments on the mandrel. Portions of the braided plurality of filaments may be secured to the mandrel, for example using bangles, wire, and/or adhesive.

A mandrel for manufacturing a vascular device for treating a vessel includes an elongate strand and a plurality of bulbs coupled to the elongate strand. The elongate strand may extend through each of the plurality of bulbs. The mandrel may include first and second elongate strands each including a plurality of bulbs. The first and second elongate strands may be separable at an intermediate portion coupling the first and second elongate strands. A vascular device manufactured utilizing the mandrel may be configured to treat a vessel.

A continuous braid structure has one or more first braid sections, each having a respective single flat braid or a respective single tubular braid. A plurality of second braid sections each have at least two flat braids with a gap between them. The second braid sections alternate with the one or more first braid sections. The adjacent first and second braid sections are continuous with each other. A length of material extends through the respective gap of at least one of the one or more second braid sections, so the length of material crosses one or more times between a first side of the continuous braid and a second side of the continuous braid.

The invention relates to a medical implant, particularly a stent, having a wall (11) braided out of multiple wires (10a, 10b) said wall extending along a longitudinal axis L and curving around the longitudinal axis L at least in sections, wherein in each case at least two wire ends (12) of the wires (10a, 10b, 10c, 10d) are connected to at least two first braid ends (13a, 13b) forming a first circumferential section (16a) of the wall (11) extending around the longitudinal axis L. The invention is characterised in that in each case at least two first braid ends (13a, 13b) are connected to one or more second braid ends (14a, 14b), wherein the second braid ends (14a, 14b) form a second circumferential section (16b) of the wall (11) extending around the longitudinal axis L and following the first circumferential section (16a) in sequence in the longitudinal direction or the second braid ends (14a, 14b) are arranged in the circumferential direction U of the wall (11).

A train signaling system, including a traffic signaling chain terminus set up unit configured to set a terminus location of a train running on the track and transmit a wireless traffic signal, a plurality of traffic signaling chain relay units installed along the track and configured to forward the wireless traffic signal and allow the wireless traffic signal to form a traffic signaling chain comprising distance-to-go information of the train, and a traffic signaling chain detection unit configured to allow the train to achieve the receipt of the information on the traffic signaling chain and calculate the distance-to-go of the train. A method for detecting distance-to-go of a train is also provided.

A method for calibrating a moving object impact detector is disclosed. A controller may receive input indicative of movement of an impact element from a first position to a second position. The controller may also receive an activation signal corresponding to the movement of the impact element. The controller may further receive input indicative of instructions to correlate the activation signal with the movement of the impact element. The controller may selectively set the activation signal as a reference signal for the detector, with the reference signal being indicative of an impact the moving object impact detector is set to detect.

In a railway signalling system which transmits a control order to an on-board signalling system by a trackside signalling system, the on-board signalling system being mounted on a train running on a line and the control order being compliant with a signalling system of the line, the present invention allows the train to run through into lines with different signalling systems using a single on-board signalling system. When the train enters a line with a different signalling system from a current line, the on-board signalling system installs a train control application program compliant with the signalling system of the entering line. Then, the on-board signalling system executes the train control application program, allowing the train to be controlled on the entering line according to a control order created by the trackside signalling system of the entering line.

An electrical device not only controls train signals as trains advance, but also alters the voltage in the tracks leading up to the signals so that the trains will actually stop at a red signal, slow at an amber aspect and continue on at full speed when the signal is showing green. The electrical device of the present invention can change the “block signal” from “green” to “red”, thereby signaling the engineer behind the train to come to a stop. In addition, the electrical device can simultaneously change the voltage in the tracks to stop the approaching train at the red signal. Only when the forward train has cleared will the approaching train get a clear signal and voltage to resume its forward progress.

A method of detecting and signaling a hot box condition on a rail vehicle comprising the steps of acquiring temperature data from undercarriage components of the rail vehicle through temperature sensors provided in hot box detection devices; relaying temperature data through a wireless network of the hot box detection devices to a data recorder.

A system and method for interactively producing a 3D representation of a vector graphic is disclosed. A vector graphic representing a 2D graphic having a number of endpoints joined by vector segments is automatically or interactively converted into a triangulated mesh in a form readable by a 3D printer. The conversion from vector graphic to a triangulated mesh is accomplished by generating an n-sided polygon in the vicinity of each endpoint of the vector graphic. Each of the vertices of the polygon are then be joined by a line to a corresponding vertex on the next adjacent polygon. Each vertex is also joined to an adjacent vertex on the next adjacent polygon. The process is continued until all polygons are joined, resulting in a triangulated mesh, which is then converted into a format readable by a 3D printer and sent to a 3D printer to produce the 3D representation.

Compounds of Formula I, including pharmaceutically acceptable salts, as well as compositions containing these compounds, have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV:

The invention relates to an apparatus and method which allows information representing a state or condition or an action to be performed as part of a control system to be present to one or more users. The information is selected and generated in a manner which removes or at least reduces the risk of potentially catastrophic error occurring which would be possible if, for example, the information is corrupt or lost during subsequent transmission, remote processing and/or displaying. One such use of the apparatus and method of the invention is in relation to transport vehicles and the control of the movement of said vehicles along predefined geographical paths.

A method and system for verifying trackside conditions in safety critical railroad applications by reporting the status of trackside signals and switches to a remote train control system. The system comprises at least one sensor for providing trackside conditions electrically connected to a circuit for providing trackside conditions to a railroad, said sensor being powered by voltage applied to the circuit such that the sensor is energized only when said electrical component is engaged. The system and method further comprises a method and system which is failsafe and which enables the control system to independently verify signals from each sensor.

A train control system with pulse code-modulated cab signaling, especially for defining traveling speeds, includes a code generator acting upon a signal generator in dependence on a direction of travel. An output signal of the signal generator is supplied to a current track circuit covering a track section. In order to economize on components, the signal generator includes a transmitting device for modulating the input signals of both code generators. The transmitting device is connected to circuit connection adaptation devices on one of two entry ends of the track section through travel direction-specific outputs.

A locomotive warning system includes an acoustical warning subsystem configured to emit variably directed sound. A controller subsystem is responsive to an initiation command and is configured to trigger the acoustical warning subsystem to begin a sounding sequence when the initiation command is received at a first directivity angle and to continue the sound blast sequence at increasing directivity angles for a pre-establish time and/or distance traveled.

A system and method for determining dynamically changing distributions of vehicles in a vehicle system are disclosed. The system and method determine handling parameters of the vehicle system. The handling parameters are determined for different distributions of the vehicles among different groups at different potential change points along a route. The system and method also determine whether to change the distributions at potential change points based on the handling parameters. Based on determining that the distributions are to change, a selected sequence of changes to the distributions is determined at one or more of the potential change points along the route. Change indices are generated based on the selected sequence. The change indices designate times and/or the one or more potential change points at which the distributions changes. The vehicles included in a common group have common designated operational settings while the vehicles are in the common group.

A sequential monitoring system is for an interlocking logic system and a track circuit system including a plurality of track circuits. The sequential monitoring system includes an interface between the interlocking logic system and the track circuit system; and a processor structured to monitor a state of each of the track circuits, validate a sequence of state changes of the track circuits, and interrupt and correct invalid track circuit state indications between the track circuit system and the interlocking logic system. The interface normally passes inputs from the track circuit system to outputs to the interlocking logic system. When an out of sequence event occurs, the processor applies a quarantine to a minimum of three of the track circuits in a quarantined area, thereby inhibiting use of an unoccupied track circuit in the quarantined area.

An adjustable thermal die assembly is provided. The thermal die assembly includes a thermal forming die and at least one insert. The thermal forming die has at least one die cavity of a select shape. The die further has at least one opening to the at least one die cavity. The at least one insert has at least one internal passage that is conformed to have a shape of the at least one opening to the at least one die cavity of the die. Moreover, the at least one insert is configured and arranged to be selectively coupled to the die with the at least one internal passage of the at least one insert aligning with the at least one opening of the at least one die cavity to selectively increase a depth of a forming cavity of the thermal forming assembly.

The invention relates to a molding tool for the production of components composed of fiber composite materials, in which the molding tool has a fiber composite structure and an electrical resistance heating element, whereby carbon fibers or carbon filaments are embedded into the fiber composite structure of the molding tool in a plastic matrix, close to the shaping surface of the molding tool. Such a molding tool is further developed in that the carbon fibers or carbon filaments in the plastic matrix, close to the shaping surface, essentially determine the mechanical strength of the molding tool, and that the electrical resistance heating element is interconnected in such a manner that at least individual sections of the electrical resistance heating element form an electrical parallel circuit with one another.

A mold structure, a patterning method thereof and a method of fabricating an LCD device using the same are disclosed, which can realize a conformal contact by applying a voltage between a mold structure and a material layer being opposite to each other in an In-Plane Printing process, so as to prevent defective patterns, wherein the mold structure comprises a mold whose surface is provided with patterns; a backplane for supporting the mold; and a conductive film formed between the backplane and the mold.

In a process for producing half-shells (2) which are made from a dough for bakery products and are characterized by an annular orifice rim (6) with a finished surface, by producing a wafer sheet (1) comprising a plurality of half-shells (2) connected to one another by an interconnecting wall (4), by forming and baking said dough in a mold with the use of a mold formed by two complementary plates (12, 14) having respective front surfaces which, as a result of the fitting together of the two plates, can define a forming cavity having a shape generally corresponding to that of said wafer sheet (1), a mold is used wherein the front forming surface of at least one of said plates has shaped portions (26) which project towards the front surface of the other plate (12) and which can define, in the dough that is subjected to baking in the forming cavity, a notch (24) in the interconnecting wall (4) adjacent each half-shell (2), wherein the plates can be fitted together in an initial position in which the forming cavity has a volume smaller than the volume of the wafer sheet to be obtained, the dough is subjected to a first, partial baking step in the forming cavity with the molds fitted together in the initial position, while the volume of the forming cavity is kept constant until the dough is partially solidified, the dough is then subjected to finishing baking with an increase in the volume of the forming cavity, in order to obtain a wafer sheet (1) wherein the half-shells (2) are connected to the interconnecting wall (4) by an annular region (28) having a thickness which is substantially less than the thickness of the interconnecting wall (4); the half-shells can thus be separated from the wafer sheet by a slight pressure exerted in a direction perpendicular to the plane of the wafer sheet.

The present invention provides templating methods for replicating patterned metal films from a template substrate such as for use in plasmonic devices and metamaterials. Advantageously, the template substrate is reusable and can provide plural copies of the structure of the template substrate. Because high-quality substrates that are inherently smooth and flat are available, patterned metal films in accordance with the present invention can advantageously provide surfaces that replicate the surface characteristics of the template substrate both in the patterned regions and in the unpatterned regions.

The invention describes a regulating device that adapts to the aerodynamic profile of a mold bed made of composite material offsetting the geometrical deviations occurring in the mold bed. The device comprises some stiffening ribs (20) supported on a surface of the bed (10) of the mold and is equipped with actuators (21) that modify the curvature of the bed (10) of the mold.

A method for demolding concrete blocks which are cast in a resilient mold supported in a rigid frame, the mold having a top surface and at least one cavity with an opening on the top surface, which cavity holds a cured cast concrete block. The mold has two opposing edges. The demolded blocks are stacked on a collection surface. A support is positioned over the cavity and the mold, the support and the frame are inverted and positioned in demolding apparatus. After two opposing edges of the mold are engaged by the demolding apparatus, the support is withdrawn to allow the mold to sag. The blocks may release from the mold and fall onto the collection surface. If any blocks remain in the mold, a plunger mechanism is pushed against the sagging mold to release the blocks. Guide members may facilitate positioning the blocks on the collection surface.

Provided are a polycrystalline silicon ingot casting mold and a method for producing a polycrystalline silicon ingot casting mold, with which high-quality silicon ingots can be obtained at high yields by minimizing sticking with the surfaces of the silicon ingot casting mold, and losses and damages that occur when solidified silicon ingot is released from the mold. The method for producing a polycrystalline silicon ingot casting mold having a release layer, including: forming a slurry by mixing a silicon nitride powder with water, coating the surface of the mold with the slurry, and heating the mold at 400 to 800° C. in an atmosphere containing oxygen, after coating the slurry.