An injection molding machine capable of changing the position of the supply hole of the resin material in a cylinder as appropriate is provided. An injection molding machine according to one aspect of the present disclosure includes: a supply hole through which a resin material is supplied to an inside of a cylinder, the supply hole being formed in a side wall part of the cylinder; and a closing part that, when a torpedo piston moves to a side of an other end part of the cylinder in order to plasticize the resin material, moves together with the torpedo piston and closes the supply hole.

An injection molding machine capable of changing the position of the supply hole of the resin material in a cylinder as appropriate is provided. An injection molding machine according to one aspect of the present disclosure includes: a supply hole through which a resin material is supplied to an inside of a cylinder, the supply hole being formed in a side wall part of the cylinder; and a closing part that, when a torpedo piston moves to a side of an other end part of the cylinder in order to plasticize the resin material, moves together with the torpedo piston and closes the supply hole.

An injection molding machine having vent mechanism includes a plastication device, an injection device, a junction, a vent-up sensor, and a controller. The vent-up sensor detects vent-up. When the vent-up is detected, the controller switches from normal conditions to vent-up suppression conditions. The vent-up suppression conditions have at least one of the followings: increasing a rotational speed of the plastication screw to be higher than that in the normal conditions; using retreat-metering when the retreat-metering is not performed in the normal conditions, wherein in the retreat-metering, in addition to a pressure of the resin material, a force in a retreat direction is applied to the injection plunger to move the injection plunger at a predetermined retreat speed in the metering; and increasing the retreat speed of the injection plunger to be higher than that in the normal conditions when the retreat-metering is performed in the normal conditions.

An injection molding machine having vent mechanism includes a plastication device, an injection device, a junction, a vent-up sensor, and a controller. The vent-up sensor detects vent-up. When the vent-up is detected, the controller switches from normal conditions to vent-up suppression conditions. The vent-up suppression conditions have at least one of the followings: increasing a rotational speed of the plastication screw to be higher than that in the normal conditions; using retreat-metering when the retreat-metering is not performed in the normal conditions, wherein in the retreat-metering, in addition to a pressure of the resin material, a force in a retreat direction is applied to the injection plunger to move the injection plunger at a predetermined retreat speed in the metering; and increasing the retreat speed of the injection plunger to be higher than that in the normal conditions when the retreat-metering is performed in the normal conditions.

Molding methods and molds for making a synthetic resin molded product include disposing a curable liquid resin mixture in a recess of a female mold. The curable liquid resin mixture is then simultaneously agitated and degassed by a mixer while under a partial vacuum. More specifically, at least the female mold is orbited around an orbital axis while being rotated about a rotational axis that is eccentric to the orbital axis. After being thoroughly mixed and degassed, the liquid mixture is then cured in the mold unit.

Molding methods and molds for making a synthetic resin molded product include disposing a curable liquid resin mixture in a recess of a female mold. The curable liquid resin mixture is then simultaneously agitated and degassed by a mixer while under a partial vacuum. More specifically, at least the female mold is orbited around an orbital axis while being rotated about a rotational axis that is eccentric to the orbital axis. After being thoroughly mixed and degassed, the liquid mixture is then cured in the mold unit.

The present invention relates to pellets comprising a liquid crystal polyester resin, wherein an average length (L) of the pellets is 3.2 to 12 mm, an average diameter (D) of the pellets is 3.2 to 6.0 mm, and a value of the average length (L)/the average diameter (D) of the pellets is 1 to 2.

A method of forming a thin-walled skin includes coating at least one side of a mold cavity of a molding tool, evacuating air from the mold cavity, and filling the mold cavity with a molten polymeric resin. Among other optional variations of the disclosed method, an inert gas is injected into the molten polymeric resin simultaneously with the step of filling the mold cavity with a molten polymeric resin. As a result, high quality, large, thin-walled skins are produced by the teachings of the present disclosure.

A method of forming a thin-walled skin includes coating at least one side of a mold cavity of a molding tool, evacuating air from the mold cavity, and filling the mold cavity with a molten polymeric resin. Among other optional variations of the disclosed method, an inert gas is injected into the molten polymeric resin simultaneously with the step of filling the mold cavity with a molten polymeric resin. As a result, high quality, large, thin-walled skins are produced by the teachings of the present disclosure.

The electroacoustic transducer (1) is configured for the generation of shock waves for the treatment of the human or animal body. The electroacoustic transducer (1) includes piezoelectric elements (5), which are arranged within a bearer (4) in a housing (2, 3). Between the piezoelectric elements (5) and the housing (2, 3) a free space is formed, which is in-filled with a casting compound (10).