Abstract: A connector member for connecting pipe line blocks according to an embodiment of this disclosure includes a hollow pipe-shaped portion made of a synthetic resin, and an O-ring. The pipe-shaped portion has a ring-shaped seal groove on an outer peripheral surface of the pipe-shaped portion, and an inclined surface having a conical surface shape on a side close to a pipe end from the seal groove on the outer peripheral surface, a diameter of the inclined surface being reduced toward the pipe end. The O-ring is attached to the seal groove. D2 representing a diameter of a cylindrical portion defined by a bottom surface of the seal groove and D3 representing an inner diameter of the O-ring with no load satisfy a relationship of D2>D3. D1 representing an outer diameter at the pipe end of the pipe-shaped portion and D2 satisfy a relationship of D1<D2.

Abstract: A connector member according to this disclosure includes: a hollow pipe-shaped portion molded by injection molding of a synthetic resin; two ring-shaped seal grooves disposed at an outer peripheral surface of the pipe-shaped portion; and a ring-shaped gate mark formed at a region close to a pipe end with respect to the seal groove, the ring-shaped gate mark being formed at an inner peripheral surface side of the pipe-shaped portion.

Abstract: A connector member according to this disclosure includes: a hollow pipe-shaped portion molded by injection molding of a synthetic resin; two ring-shaped seal grooves disposed at an outer peripheral surface of the pipe-shaped portion; and a ring-shaped gate mark formed at a region close to a pipe end with respect to the seal groove, the ring-shaped gate mark being formed at an inner peripheral surface side of the pipe-shaped portion.

Abstract: A connector member according to this disclosure includes: a hollow pipe-shaped portion molded by injection molding of a synthetic resin; two ring-shaped seal grooves disposed at an outer peripheral surface of the pipe-shaped portion; and a ring-shaped gate mark formed at a region close to a pipe end with respect to the seal groove, the ring-shaped gate mark being formed at an inner peripheral surface side of the pipe-shaped portion.

Abstract: A disk-shape resin molded article such as a gear comprises a rim, a boss, a web having a disk configuration for connecting the rim and the boss, and gear teeth formed on the rim. The molded article is produced by an injection-compression molding process which comprises injecting a molten resin into a cavity of a metal mold, and pressing a web site and at least one site selected from the group consisting of a boss site and a rim site in a thickness direction. The cavity may have a capacity larger than the solidified products by contraction amount of the injected molten resin.

Abstract: A disk-shape resin molded article such as a gear comprises a rim, a boss, a web having a disk configuration for connecting the rim and the boss, and gear teeth formed on the rim. The molded article is produced by an injection-compression molding process which comprises injecting a molten resin into a cavity of a metal mold, and pressing a web site and at least one site selected from the group consisting of a boss site and a rim site in a thickness direction. The cavity may have a capacity larger than the solidified products by contraction amount of the injected molten resin.

Abstract: A disk-shape resin molded article such as a gear comprises a rim, a boss, a web having a disk configuration for connecting the rim and the boss, and gear teeth formed on the rim. The molded article is produced by an injection-compression molding process which comprises injecting a molten resin into a cavity of a metal mold, and pressing a web site and at least one site selected from the group consisting of a boss site and a rim site in a thickness direction. The cavity may have a capacity larger than the solidified products by contraction amount of the injected molten resin.