Abstract:
To provide a resin molding machine that can reduce cost by eliminating the need for a residual-material remover, and can reduce cycle time and the amount of residual material, the resin molding machine includes a stationary cavity plate that has a gate communicating with a cavity, a sprue bushing in which a sprue is formed for feeding a molding material through the gate into the cavity, a runner plate disposed between the stationary cavity plate 13 and the sprue bushing, a cylinder unit (runner-plate driving mechanism) for rectilinearly reciprocating the runner plate between ejecting positions and via a molding position, the ejecting positions being separated from the molding position A and provided for ejecting the residual material, and an ejecting channel (residual-material ejecting mechanism) for ejecting the residual material at the ejecting positions.
Abstract:
An injection molding machine includes a plasticating unit for plasticating a thermoplastic resin, and an injecting unit connected to the plasticating unit through a connecting passage to inject the plasticated resin into a mold. In the connecting passage, provided is a buffering unit for reserving the resin in an amount at least equal to the quantity of the resin injected per one shot. The plasticated resin is temporarily reserved in the buffering unit, and then, the reserved resin is fed to the injecting unit when the measuring is carried out, whereby the plasticating unit can be driven continuously simultaneously with the operation of the injecting unit and the mold. The molding cycle can shortened with the plastication efficiency being enhanced.
Abstract:
An injection molding machine includes a plasticating unit for plasticating a thermoplastic resin, and an injecting unit connected to the plasticating unit through a connecting passage to inject the plasticated resin into a mold. The injecting unit A includes a rotary pump having a suction port connected to the plasticating unit through the connecting passage and a discharge port connected to the mold. The plasticated resin is intermittently injected into the cavity of the mold through the injection port by means of the rotary pump. In the connecting passage, an accumulator is provided which reserves the resin plasticated in the plasticating unit in an amount equal to or more than the shot capacity, and feeds the resin to the rotary pump.
Abstract:
A method of injection-moulding includes separating an injection nozzle from a mould during every moulding cycle. An apparatus for carrying out the method is also disclosed.
Abstract:
The object is to provide a handset for a telephone set or for a radio communication unit to enable its user to receive a communication while enjoying music through a headphone set and the like. The handset is small in size, light in weight and excellent in fittingness. Further, the handset enables its user to easily perceive a voice sound in communication even in a high-noise environment, and also enables the user to speak in a whisper without making the people around the user uncomfortable. Still further, the handset is capable of serving as a personal ornament of the user. The handset is provided with a bone conduction speaker portion 2, a microphone portion 3 and a drive circuit storage portion 4, and is capable of being connected with the telephone set or the radio communication unit. The bone conduction speaker portion 2 is capable of being disposed adjacent to any desired area of the user's face when the microphone portion 3 is disposed adjacent to the user's mouth.
Abstract:
The component handling tool (14) is moved linearly up and down on a moving mechanism (11) by feedback control of a linear motor (16) for performing pickup and mounting actions of components (3). The linear motor is controlled to effect a downward movement of the component handling tool for bringing the component handling tool or the component held thereby closer to the component or to a mounting object, and upon detecting changes in control information when contact is made with the component or the mounting object, control of the linear motor is switched to a pressing operation, whereby the holding or mounting of the component in a prescribed pressed condition is accomplished.
Abstract:
In accordance with a component mounting method, a component stored in a component feeder is held by a component holding member and then is mounted in a mounting position on n object. The method includes, when a mounting posture of the component in which the component is mounted onto the object is inclined with respect to a basic posture of the component by a mounting angle, the operation of holding the component from the component feeder by the component holding member that has preliminarily been rotated to the mounting angle in such a direction as to depart from a reference posture of the component holding member prior to the mounting of the component on the object. And afterwards, the component holding member is rotated in a specified direction to finally return the component holding member to the reference posture, and then the component is mounted on the object.
Abstract:
An electronic component mounting method for sucking up an electronic component and placing it onto a board with a suction nozzle, includes a step of switching over air pressure switching timings for the suction nozzle when the component is sucked with the suction nozzle and when the sucked component is mounted on the board according to a velocity of up and down movement of the suction nozzle and independently for each of when the component is sucked with the suction nozzle and when the sucked component is mounted on the board. An electronic component mounting apparatus includes a suction nozzle for sucking an electronic component and placing it onto a board, a device for moving up and down the suction nozzle for suction and mounting of the electronic component, an air pressure switching unit for switching air pressure to the suction nozzle at an electronic component suction position and an electronic component mounting position, and a switching drive unit for performing switching control of the air pressure switching unit independently for each of when the component is sucked with the suction nozzle and when the sucked component is mounted on the board.
Abstract:
There is provided a four-cycle engine which can appropriately circulate oil in an engine regardless of a tilted condition with a simple structure. A crankcase (4) of a four-cycle engine (1) has a crank room (41) which rotatably supports a crankshaft (10) and an oil room (42) which is provided adjacent to the exterior of the crank room (41). The crankcase (4) also has partition walls (43) and (44) which partition the interior of the crankcase (4) into the crank room (41) and the oil room (42), respectively, and a communication path (45) which communicates the crank room (41) with the oil room (42). The partition walls (43) and (44) each has a cross section formed in a substantially V shape, and the communication path (45) is formed at an apex between the partition walls (43) and (44).
Abstract:
An electric tool including: a motor; a housing including, a motor housing accommodating the motor, and a handle housing having one end connected to the motor housing and another other end configured to be provided with a detachable battery pack; an output part partially accommodated in the motor housing and configured to be driven by the motor; and a control board accommodated in the motor housing and configured to control the motor.