Abstract: A composite gear includes: a first member comprising a rotation shaft portion and a disk-shaped web extending in radial directions from the rotation shaft portion; and a second member comprising at least one engaging tooth on an outer periphery thereof and provided being supported by the web so as to surround an outer periphery of the first member. A space is provided between the second member and an outermost peripheral surface of the first member in a radial direction, a space is provided between the first member and an innermost peripheral surface of the second member in a radial direction, and at least one of the first member and the second member is formed to nip another of the first member and the second member from both sides thereof in an axial direction of the rotation shaft portion.

Abstract: A resin shaping mold includes a hot runner, a cavity, a cold runner, and a valve pin. The cold runner is connected to the hot runner and the cavity. The cold runner has a lower temperature than the hot runner. The valve pin configured to move forward and backward from the hot runner toward the cold runner and close a channel of molten resin from the hot runner to the cavity at a predetermined position. The valve pin includes a runner lock portion configured to hold resin solidified at a position further on the cavity side with respect to the predetermined position in the cold runner.

Abstract: A composite gear includes: a first member comprising a rotation shaft portion and a disk-shaped web extending in radial directions from the rotation shaft portion; and a second member comprising at least one engaging tooth on an outer periphery thereof and provided being supported by the web so as to surround an outer periphery of the first member. A space is provided between the second member and an outermost peripheral surface of the first member in a radial direction, a space is provided between the first member and an innermost peripheral surface of the second member in a radial direction, and at least one of the first member and the second member is formed to nip another of the first member and the second member from both sides thereof in an axial direction of the rotation shaft portion.

Abstract: A resin shaping mold includes a hot runner, a cavity, a cold runner, and a valve pin. The cold runner is connected to the hot runner and the cavity. The cold runner has a lower temperature than the hot runner. The valve pin configured to move forward and backward from the hot runner toward the cold runner and close a channel of molten resin from the hot runner to the cavity at a predetermined position. The valve pin includes a runner lock portion configured to hold resin solidified at a position further on the cavity side with respect to the predetermined position in the cold runner.