Abstract: An injection molding die includes a fixed die and a movable die that move in a die opening/closing direction relatively to each other. A cavity that is formed between the fixed die and the movable die in a die clamping state includes a lateral cavity portion that extends along the die opening/closing direction and a first orthogonal direction. The injection molding die includes a demolding core and a following core that define an end portion of the lateral cavity portion across the fixed die and the movable die in a second orthogonal direction. The demolding core and the following core are configured to be movable in the second orthogonal direction while defining the end portion of the lateral cavity portion across the fixed die and the movable die in the die clamping state, and to be engaged with the fixed die with substantially no play in the second orthogonal direction.

Abstract: An injection molding die includes a fixed die and a movable die that move in a die opening/closing direction relatively to each other. A cavity that is formed between the fixed die and the movable die in a die clamping state includes a lateral cavity portion that extends along the die opening/closing direction and a first orthogonal direction. The injection molding die includes a demolding core and a following core that define an end portion of the lateral cavity portion across the fixed die and the movable die in a second orthogonal direction. The demolding core and the following core are configured to be movable in the second orthogonal direction while defining the end portion of the lateral cavity portion across the fixed die and the movable die in the die clamping state, and to be engaged with the fixed die with substantially no play in the second orthogonal direction.

Abstract: A hot runner device includes a fixed die, a hot runner block, a valve gate, and a valve pin. The hot runner block includes a first block including a first resin passage, a second block including a second resin passage communicating with the valve gate and a hot runner pipe through which the first resin passage communicates with the second resin passage. The hot runner pipe is disposed such that a first end of the hot runner pipe is fixed to one of the first and second blocks, and a second end of the hot runner pipe is distanced from the other one of the first and second blocks by a predetermined distance in a pipe axial direction during cold time. The predetermined distance is set to be smaller than an expansion amount of the hot runner pipe at a time when a temperature is increased.