Abstract: An electric field is formed between a material to be coated 18 and a coating sprayer 4 by applying a high voltage of ?1 kV to ?90 kV to an electrode needle 7 at a tip of the coating sprayer 4, while maintaining the material to be coated 18 positively. An inert gas is sprayed from an inert gas spraying nozzle 8 to the material to be coated 18, and a solution having a dielectric substance dissolved in a solvent is simultaneously sprayed from a dielectric solution spraying nozzle 6, while giving negative charge to the dielectric solution, to form a precursor polarization film. The solution is discharged from the spraying nozzle 6 by injecting the inert gas in the spraying nozzle 6. Then, the electric field is formed again and the precursor polarization film is further polarized, to thereby form a piezoelectric/pyroelectric film on the material to be coated 18.

Abstract: A molding method providing a homogeneous surface without any patch by dyeing or reforming a resin surface in a die concurrently to molding, in injection-, blow-, or compression molding, after thermoplastic resin is filled in a die cavity. After blow-molding, or after compression molding, mixture gas of carbon dioxide gas and a dye, or mixture gas of carbon dioxide gas and a reformer is injected between the resin and the die for forming a clearance, and pressure of the mixture gas is kept at a constant level. The mixture gas is dissolved in a molded surface, and a pressure is applied to contact the molded surface to the cavity face. The mixture gas in the clearance is exhausted and cooled, and the molded product is taken out. A dye-permeated layer or a reformer-permeated layer is formed on a surface of the molded product.

Abstract: A thermo-welding device used for a thermoplastic resin molded goods is provided to drastically reduce cooling time and increase productivity. The device is used with a welding boss (5a) formed on the molded goods (5) made of thermoplastic resin inserted into a fixing hole 6a formed on the fixed object (6). A tip section of the welding boss (5a) projecting out from the fixing hole 6a is heated and fused to form an extended portion (5c) outside the fixed object (6) to apply to the welding boss (5a) of a molded good (5) in the thermo-welding device used for fixing the fixed object (6) to the molded good. In a portion of the periphery of a heating element having in a tip section thereof an applying side 21 to heat and fuse the welding boss 5a, a slit 23 is provided to exhaust air after the air cools the inside of the heating element 20.

Abstract: In the filling step, the forward movement speed of the screw is controlled in accordance with a predetermined speed pattern until the screw reaches a deceleration initiation point, LS4B. After the screw reaches LS4B, a deceleration step is started. In the deceleration step, the forward movement speed of the screw is controlled in a feedback manner such that the internal pressure of the mold reaches a predetermined target pressure. When the screw reaches a pressure holding initiation point, LS4 (or pressure holding initiation time, TR2), the pressure holding step is started. In the pressure holding step, the target pressure, which is a function of time, is changed with time in accordance with a program. When the operation goes to the pressure holding step, the set of PID coefficients within the feedback control loop are replaced by different set of PID coefficients.