According to one embodiment, a mold includes a substrate clamping surface, a cavity, a suction part, a vent, an intermediate cavity, and an opening/closing part. The substrate clamping surface contacts a surface of a processing substrate. The cavity is recessed from the substrate clamping surface. The suction part is recessed from the substrate clamping surface. The vent is provided on a path between the cavity and the suction part, communicates with the cavity, is recessed from the substrate clamping surface to a vent depth. The intermediate cavity is provided between the vent and the suction part on the path, communicates with the vent, and is recessed from the substrate clamping surface to an intermediate cavity depth deeper than the vent depth. The opening/closing part opens and closes the path and is provided between the intermediate cavity and the suction part on the path.

A resin molded product (10) includes a resin molded product main body (11), and a protrusion (12) integrally formed with the resin molded product main body (11) and protruding from the resin molded product main body (11). At injection molding of the resin molded product (10), molten resin flows through a portion (C-1) corresponding to the protrusion (12) in a cavity (C) defined by a pair of molds (20, 30). A concave portion (14) is formed on a rear side of the protrusion (12), and a bulging portion (12a) having a hollow bag shape is formed on a front side of the protrusion (12).

A disclosed insert molding method includes installing a first insert piece between a first mold and a second mold such that a smallest distance in a gap between the first insert piece and the first mold is smaller than a smallest distance in a gap between the first insert piece and the second mold, the first insert piece including a first through-hole of which width is larger than the smallest distance in the gap between the first insert piece and the first mold; and supplying a resin to a mold gap between the first insert piece and the first mold or the second mold, thereby to fill the mold gap with the resin, while the first insert piece and the first mold are kept to abut each other.

A mold for injection molding processes and a molding process that uses the mold. The mold has, at at least one part of the surface of its cavity raised portions which are longitudinally extended, are arranged side by side and are oriented substantially in the direction of the flow of the melted plastic material that is injected. During the process, the surface of the cavity of the mold is kept at a temperature that is lower than the glass transition temperature, in the case of molding of plastic material constituted by amorphous polymers, and lower than the crystallization temperature, in the case of molding of plastic material constituted by semicrystalline polymers.

A compression collar is manufactured for use in reinforcing an interference fit between an end of a pipe and a fitting. A precursor form is injection molded using a cold-expansion material. The precursor form has a tubular body with an initially closed axial end and a bore that is initially blind formed in the other axial end. Material is removed from the initially closed axial end of the tubular body of the precursor form to form an opening in the initially closed axial end that connects to the bore thereby forming the compression collar. The opening has an inner periphery with a profile in axial cross section that is different than any profile in axial cross section of an inner periphery of the bore. The collar formed may lack knitlines and may include tabs formed during the removal step which help to position the collar on a pipe.

A rotating reflector is a resin rotating reflector including: a rotating part; and a blade provided around the rotating part and functioning as a reflecting surface, wherein the rotating part has a hole in which a rotary shaft is inserted.

A method for manufacturing a worm wheel including an inner wheel element including a side plate portion and a tubular eave portion, and an outer wheel element including a wheel tooth portion on an outer circumferential surface thereof, and coupled and fixed to the inner wheel element in a manner of covering a radially outer portion of the side plate portion and the eave portion, the method includes: molding the outer wheel element by disposing a mold around a radially outer portion of the inner wheel element, and feeding the molten synthetic resin from an annular or arc-shaped injection gate toward a pocket portion that is continuous over an entire circumference of a cavity present between an inner surface of the mold and a surface of the inner wheel element and that is present on a radially inner side of the eave portion.

The present invention is directed to a mold for forming the cover of a golf ball having a non-planar parting line on its spherical surface.

An angle gating injection molding apparatus is disclosed. The apparatus includes a gate axis misaligned with a cone axis of a nozzle tip.

An optical element made of resin includes a first surface configured to serve as an optical surface, a second surface configured to serve as an optical surface, a third surface configured to serve as an optical surface, and a fourth surface configured to connect to the third surface. The third surface includes a peripheral area and an inner area, and a distance from an outer edge of the third surface to a position in the peripheral area is equal to or smaller than 5 mm and a distance from the outer edge of the third surface to a position in the inner area is larger than 5 mm. A weld is formed in at least any one of the peripheral area of the third surface and the fourth surface.