In a molding die, movable die elements are respectively received in die element receiving holes formed in a frame plate. An end surface of the frame plate, which faces a cavity at a location that is other than locations of the die element receiving holes, forms a frame portion compression surface. An end surface of each movable die element, which faces the cavity, forms a split compression surface. Die element drive devices respectively drive the split compression surfaces of the movable die elements. A whole compression plate commonly supports an opposite end part of the frame plate and opposite end parts of the movable die elements, which are opposite from the cavity. When the whole compression plate is moved forward, the whole compression plate integrally drives the frame plate and the movable die elements forward. A whole drive device drives the whole compression plate.

A molding system (10) for fabricating a part comprises a first mold section (12) defining a first mold cavity (14), a first insert (16) slidable to a plurality of positions relative to the first mold cavity (14) to adjust a dimension of the mold cavity, a second mold section (20) to be disposed adjacent to the first mold section (14) to at least partially enclose the first mold cavity (14), a molding material conduit (26) to be disposed in fluid communication with the first mold cavity (14), and a positioning mechanism (18) configured to move the first insert (16) to the plurality of positions relative the first mold cavity (14).

An injection molding apparatus according to an embodiment is configured to mold a thermoplastic resin into a thick-walled component by injection molding. The injection molding apparatus includes a mold having a cavity and a core; and a controller configured to control an operation of the mold. The controller is capable of performing a filling and pressure holding process of filling the thermoplastic resin between the cavity and the core in a state in which a distance between the cavity and the core is increased, and a cooling and solidifying process of cooling and solidifying the filled thermoplastic resin while pressurizing the filled thermoplastic resin by decreasing the distance between the cavity and the core. The controller stacks the thermoplastic resin by performing an operation set including the filling and pressure holding process and the cooling and solidifying process a plurality of times.

A molding method includes providing a molding device, wherein the molding device includes a first mold and a second mold corresponding to the first mold; moving the first mold towards the second mold to form a first mold cavity; supplying a gas to the first mold cavity; injecting a material into the first mold cavity; and moving the first mold away from the second mold to form a second mold cavity and discharge at least a portion of the gas out of the molding device, wherein a first volume of the first mold cavity is substantially less than a second volume of the second mold cavity.

An injection molded thermoplastic preform for blow moulding to form a container, the preform base of a central part having a first, downwardly and radially inwardly tapering portion therebetween which increases in thickness from a radially outer end of the first tapering portion adjacent to the hollow transition portion to a radially inner end of the first tapering portion adjacent to the gate part and the middle part opposite the gate part can allow the injected resin to be urged back through the gate at the end of the injection moulding cycle at a lower fluid pressure in the vicinity of the gate which is associated with high resin temperatures. The technical effect achieved by the first tapering portion is that crystallinity in the gate area is minimized or eliminated, which avoids or minimizes partial blocking of the gate which would otherwise restrict the injected resin from being urged back through the gate at the end of the injection moulding cycle.

A method of the invention which manufactures a molded product by injection molding using injection molding die including a pair of dies includes: injecting and filling the resin in a molten state in a state where a temperature of the injection molding die is higher than a deformation temperature of resin to be injected and filled; reducing a volume of a cavity due to volume contraction of the resin when cooling thereof; and carrying out molding while maintaining a state where the resin is brought into close contact with both cavity surfaces of the pair of the dies.

A molding method includes providing a molding device, wherein the molding device includes a first mold and a second mold corresponding to the first mold; moving the first mold towards the second mold to form a first mold cavity; supplying a gas to the first mold cavity; injecting a material into the first mold cavity; and moving the first mold away from the second mold to form a second mold cavity and discharge at least a portion of the gas out of the molding device, wherein a first volume of the first mold cavity is substantially less than a second volume of the second mold cavity.

A method produces a foamed decorable support part for a motor vehicle, wherein a sheet with a base layer, an adhesive layer and a protective layer is laminated in an injection-molding process.

An injection moulded thermoplastic preform for blow moulding to form a container, the preform comprising a lower closed base portion, a hollow body portion, a hollow transition portion between the lower closed base portion and the hollow body portion, and an upper open end portion adjacent to an upper part of the hollow body portion, wherein the closed base portion comprises a central portion which extends over at least 50% of an internal radius of a lower end of the hollow body portion and is either substantially flat or has a shallow concave or convex internal curvature, and the transition portion comprises an upwardly and radially outwardly tapering portion extending away from the central portion to connect to the hollow body portion, the tapering portion being inclined at an angle of from 1 to 20 degrees to a longitudinal axis of the preform and the tapering portion increasing in thickness from the central portion to the hollow body portion. Also disclosed is a method of injection moulding the thermoplastic preform.

In a molding die, movable die elements are respectively received in die element receiving holes formed in a frame plate. An end surface of the frame plate, which faces a cavity at a location that is other than locations of the die element receiving holes, forms a frame portion compression surface. An end surface of each movable die element, which faces the cavity, forms a split compression surface. Die element drive devices respectively drive the split compression surfaces of the movable die elements. A whole compression plate commonly supports an opposite end part of the frame plate and opposite end parts of the movable die elements, which are opposite from the cavity. When the whole compression plate is moved forward, the whole compression plate integrally drives the frame plate and the movable die elements forward. A whole drive device drives the whole compression plate.