Abstract: A high-accuracy traveling table apparatus comprises a workpiece fixing device and a laser mirror for position measurement provided on a table capable of travelling at least in the direction of one axis. The table comprises a mount to which the workpiece fixing device and the laser mirror are fixed and at least one partially coupling member for partially coupling the mount to the table so as to prevent transmission of a distortion of the table to the mount.

Abstract: A member is prepared by forming a magnetic surface layer on a magnetic base member having a different composition from the surface layer. A laser beam is radiated onto the member so as to fuse the member and the surface layer, thereby forming a fused portion having magnetic properties. A modified portion is formed in a portion of the fused portion corresponding to the surface layer such that this portion has different permeability from other portions of the surface layer.

Abstract: An evaluation method of a flow analysis on molding of a molten material is achieved in a system of performing a flow analysis on an in-mold molten material through breakdown of a molded part model into minute elements and numerical analysis thereof including the calculi of finite elements, boundary elements, finite differences, FAN and the like. One or more temperature conditions of the molten material are provided with a plurality of loading times respectively for conducting an analysis and from the obtained operational results of the temperature distribution of the molten material after loading, an average temperature or a medium layer temperature of each element is calculated as a function Tn=fn(t) having a variable of the loading time. This function is graphically indicated on a display apparatus to determine the ranges of the molten material temperature and the loading time at a predetermined mold temperature.

Abstract: An evaluation method analyzes flow on molding of a molten material. This is achieved in a system of making a flow analysis on an in-mold molten material through division of a molded part model into minute elements and numerical analysis thereof including the calculi of finite elements, boundary elements, finite differences, FAN and the like. One or more temperature conditions of the molten material are provided with a plurality of loading times or mold temperatures respectively for performing an analysis and from the obtained operational results of the pressure distribution of the molten material a function of the maximum molten material pressure of each element is provided. This function is graphically indicated on a display apparatus to evaluate the appropriate ranges of the molten material pressure and the loading time at a predetermined molten material temperature.

Abstract: A full automatic operation system for an injection molding machine which is capable of smoothly and automatically starting the purge and start-up operations and then beginning to produce the completely molded products after the barrel, mold and hydraulic fluid are heated to their optimum temperatures, respectively, automatically stopping the molding operation in case that continuous production of incomplete molded products or an abnormal condition in the molding machine occurs during the automatic operation and automatically restarting the operation after the stop.

Abstract: In an apparatus for correcting deflection produced in a construction due to the weight of the construction or movement of a movable member supported by the construction, a condition data representing the deflection associated with the moved position of the movable member is stored in a memory section of a correction controller. The movement of the movable member is detected by a position detector and a position signal is generated from the position detector. A command signal is supplied to a calculator and the position signal is received in the calculator synchronized with the command signal. The condition data is accessed by the calculator with the received position signal and is processed into a correction data. A correction data is supplied to a proportional control electromagnetic valve and a hydraulic cylinder for applying a force onto the construction is regulated by the valve to correct the deflection of the construction.

Abstract: An optimum molding condition setting system for an injection molding machine comprises a molten material flow analysis component for analyzing resin flow, resin cooling and the structure/stength of molded products by using a designed mold model and also comprises an analysis result evaluation component for determining an initial molding condition and its permissible range in accordance with the analysis results. The initial molding condition is set into the injection molding machine and a test shot is carried out in order to check for a deficiency of a molded product. If a deficiency of the molded product is detected, a data of the deficiency is entered into a molding defect elimination component. After performing a convenient data processing based on the entered data, a cause of the molding defect can be inferred and a measure for the cause can be obtained with high efficiency and accuracy.

Abstract: According to the invention, in a method of drawing patterns by use of an energy beam, the amount of drawing data is reduced, the irregularity of an array of patterns is prevented, and the patterns are drawn with great accuracy. In a method of drawing a pattern including a plurality of patterns, the amount of drawing data is reduced and the pattern can be drawn enlarged or reduced at a given scale in X-axis direction and/or Y-axis direction. Furthermore, if the pattern includes patterns symmetrical with respect to a line, the amount of drawing data is reduced by use of the symmetry of the drawing data. In addition, in case where patterns are arrayed on a first curved line, the pattern can be drawn as being arrayed on a straight line by performing the shift of a table or deflection of the energy beam parallel to the curved on which patterns are arrayed or approximating it at a second curved line using partial approximate straight lines.

Abstract: A molten injection-molding method is applicable to any system of dividing a molded product form model into micro-elements and analyzing a molten material flow behavior within the mold by the use of numerical analytic techniques that include the finite element method, boundary element method, difference method, and FAN method, among others. First, the entire length of time required for the process of filling the mold with a molten material is divided into an arbitrary number of intervals, representing the filling progress in each individual time interval in an equitime curve diagram.

Abstract: A molten injection-molding method is applicable to any system of dividing a molded product form model into micro-elements and analyzing a molten material flow behavior within the mold by the use of numerical analytic techniques that include the finite element method, boundary element method, difference method, and FAN method, among others. First, the entire length of time required for the process of filling the mold with a molten material is divided into an arbitrary number of intervals, representing the filling progress in each individual time interval in an equitime curve diagram.

Abstract: This invention relates to a casting control system of a die cast machine, and more particularly to a system for controlling a high speed injection real stroke of an injection plunger and controlling valve closing timing for degassing gas in a mold cavity. The high speed injection real stroke is measured by an arithmetic unit from a signal output from a position detector, and the high speed injection real stroke is then compared with a certain preset value. When arithmetic unit determines that the high speed injection real stroke and the preset value do not coincide with each other, a pretest action delay time of the injection plunger is .+-. incrementally or decrementally corrected until both values coincide.

Abstract: A directional control valve includes a casing having a bore therein, a pair of inlet/outlet passages connected to a pair of inlet/outlet apertures, a U-shaped supply passage disposed between the inlet/outlet passages, a pair of reservoir passages between which the inlet/outlet passages are disposed and a plunger which has a plurality of land portions and is reciprocably movable in the bore into which the inlet/outlet passages and the U-shaped passage and the reservoir passages open, such that a fluid passed through the inlet/outlet apertures and the inlet/outlet passages and the U-shaped supply passage and the reservoir passages is controlled in response to a reciprocating motion of the plunger. A sub-reservoir is provided, through which one of the inlet/outlet passages is communicated with one of the reservoir passages.

Abstract: A mold clamping pressure control method for injection compression molding through adjustment of the oil pressure in the mold clamping cylinder by the mold clamping cylinder control valve, wherein a resin temperature in the mold is detected by a resin temperature sensor, and detected values thereof are converted by a converter into electric signals, which are in turn compared with a series of the preset pressure changeover temperature setting values to output pressure changeover signals whenever the detected values correspond to the preset values. The pressure changeover signal selects any of a series of the preset pressure setting values to output the valve opening-shutting directing signals converted into a certain valve opening-shutting amount, thereby to control the opening-shutting amounts of the mold clamping pressure control valve.

Abstract: This invention provides an electron-beam lithographic apparatus in which a predetermined pattern is written on a plate and which has an arrangement for detecting defects in a written pattern. This apparatus includes an apparatus body in which a predetermined pattern is written on a plate, a storage unit for storing therein design data, a CPU for controlling the apparatus body and an interface disposed between the CPU and the apparatus body. The interface includes an unit arranged to detect defects in the pattern formed on a mask by comparing the design data with picked-up image pattern data relative to the mask.

Abstract: The present invention relates to a method of detecting a degassed state in a mold and a system therefor. A gas release opening is formed between a movable mold part and stationary mold part, and a diffuser block having a path for releasing the gas to atmosphere is disposed on the mold. A secondary flow path capable of generating a secondary flow when the gas is released is formed in this diffuser block, and a wind velocity sensor is disposed in this path. Wind velocities of the secondary flow, which are detected by the wind velocity sensor, serve as indications of a cast state and the like in a die cast machine or the like. The secondary flow path is suitably shut off by a shut-off mechanism, and connected to an air cleaner, so that the wind velocity sensor can be effectively protected from dust and the like.

Abstract: A method of and a system for operating a squeeze plunger in a die cast machine. When the fill-up of molten metal in a cavity is completed by an injection plunger, the moving speed of the injection plunger is rapidly decreased. When the speed at this time becomes lower than a preset value, a preset delay time is measured. After a lapse of this delay time, the squeeze plunger is operated to press a molding material in the cavity, so that plastic flows are caused in the molding material.

Abstract: A position control method for controlling a position of an object on a machine tool such as a lathe having a plurality of axes. The control on one of the axes is conducted in accordance with a control input signal which is generated in response to a position command signal and a state variable for each axis so as to optimize an evaluation function J, wherein the control input signal U.sub.i is generated so as to optimize the evaluation function in such a manner as to reduce path error by taking into account not only the position command signal and the state variable concerning this axes but also the position command signal and the state variable concerning another axis.

Abstract: In a system for continuously exposing desired patterns and their backgrounds on the surface of a target, a first electron beam emitted from a first electron gun is converged by condenser lenses and an objective lens to be focused on the surface of the target. A second electron beam emitted from a second electron gun is defocused at the target surface by a condenser lens and a deflecting coil. A deflector selects the first or second electron beams. While the target surface is being scanned with the selected electron beam, the beam is deflected by a scanning deflector. In delineating a pattern, the target surface is scanned with the first electron beam. In delineating a background, on the other hand, the target surface is scanned with the second electron beam.

Abstract: A pressurized holding furnace having an open feeding chamber is provided with a pressure chamber having a pressure device for pressurizing the pressure chamber and a discharge device for releasing the pressure. The pressure chamber is provided at a lower position than the lowest level of the molten metal in the pressure chamber with an inlet port of a feeding pipe and at a higher position than the highest level of the molten metal in the pressure chamber with an electromagnetic pump.

Abstract: A laser-beam, pattern drawing/inspecting apparatus comprises a reciprocating stage for supporting a printed substrate having an etchant-resistant resist layer coated on it, a laser-beam scanning device having a laser for selectively emitting a first laser beam and a second laser beam less intense than the first laser beam, and an optical system for guiding the first and second laser beams to the printed substrate along the same optical path, the first laser beam scanning the resist layer to draw a pattern thereon, and the second laser beam scanning the resist layer, and a pattern inspection device for receiving the second laser beam reflected from the resist layer, thereby to optically inspect the pattern drawn on the resist layer.