An imaging lens assembly includes a dual molded optical element, a plurality of imaging lens elements and a light blocking element. The dual molded optical element has an object-side surface and an image-side surface and includes a light transmitting portion and a light absorbing portion. The light transmitting portion includes an optical effective section. The light absorbing portion is located on at least one of the object-side surface and the image-side surface of the dual molded optical element, and a plastic material of the light absorbing portion and a plastic material of the light transmitting portion are different colors. The imaging lens elements are disposed in the inner space of the imaging lens assembly. The light blocking element is disposed adjacent to the light transmitting portion of the dual molded optical element.

A sealing member, that is a resin molded product to be joined to a flow path forming member through which a fluid flows, has a surface including an opening constituting or including a portion of the flow path, a protrusion surrounding the circumference of the opening and a rib having one of its opposite ends connected to a part of the protrusion and the other end located inside or outside of the protrusion. The protrusion has at the top thereof a contact region to be pressed against and held in contact with the flow path forming member.

Provided is construction that in die slide injection molding, surely leaves each part in a mold on a specified side in the stage of opening a molding mold. In order to accomplish this, in an opening step, a push-out mechanism that applies a force on at least one of the individual parts is used to make the part surely belong to a desired mold.

First and second constituting components are injection-molded and joined within one pair of molds. In order to join the first and second constituting components, one of the respective regions of the first and second constituting components abutted to each other is pushed into the other.

The multistep injection molding device is for manufacturing thick lenses for use with an illumination apparatus. The injection molding device includes two sets of mold core inserts forming mold cavities when the injection molding device is in a closed position. The lens core part is formed in a first injection shot station. The molded lens core part is then moved to a post-molding cooling station in which it is further cooled inside a corresponding mold cavity. Two outer lens parts are formed sequentially over the lens core part in second and third injection shot stations. A method of manufacturing a thick lens is also disclosed.

An apparatus for molding a lens for a vehicle lamp may include: a lower mold including a first lower mold part for molding a primary injection-molded product and a second lower mold part for molding a secondary injection-molded product; a rotating mold including a first middle mold part for molding the middle part of the primary injection-molded product and a second middle mold part for molding the middle part of the secondary injection-molded product; a first movement prevention stopper fixing the primary injection-molded product; a second movement prevention stopper fixing the primary injection-molded product; a movement/rotation device moving the rotating mold and rotating the rotating mold; and an upper mold including a first upper mold part for molding the upper part of the primary injection-molded product and a second upper mold part for molding the upper part of the secondary injection-molded product.

The production of a plastic molded part utilizes a barrier layer embedded in plastic. Plastic is injection-molded successively in different cavities of the injection mold onto a three-dimensional preform made from a cut of a multi-layer barrier film, which multi-layer barrier film comprises a barrier layer coated with plastic on both sides. The plastic coating of the barrier film cut is at least superficially melted by the injected plastic melt. And the preform is supported by a support formed on the corresponding partial mold on the respective opposite side.

There is provided a liquid supply member capable of suppressing deformation of a liquid supply path and decrease in sealing property of a liquid supply path, during molding, and a manufacturing method of the liquid supply member. For that purpose, in die-slide injection molding that combines two components, a protection portion that protects a part of one component easily affected by heat and pressure, is provided on the other component.

The lens is made by injection molding in a mold through the injection of molten plastic material in at least three injection shots using a multistep process. It includes a first outer lens part, a second outer lens part and a lens core part forming an interior of the lens. The lens core part is embedded between the first and second outer lens parts. The lens core part is divided into at least two subparts separated at least partially by at least one elongated slot extending across the lens core part between the first and second surfaces of the lens core part. The slot or slots made through the lens core part are filled and fused with the plastic material of the first outer lens part.

A manufacturing apparatus for a composite optical element includes a first cavity portion which molds a first optical element portion partly having a first optical function surface with the first molding material, and a second cavity portion which molds a second optical element portion that is provided on the first optical element portion to cover the first optical function surface with a second molding material, and integrates the second optical element portion with the first optical element portion, whereby mold the composite optical element. The manufacturing apparatus includes a discharge opening portion in which a discharge direction of the second molding material from a supply path portion to the second cavity portion is along the first optical function surface.