A method for preventing detachment of a three-dimensional object from a printing tray of a printing apparatus is disclosed. The method includes printing a carpet of building material below and around the base of a three-dimensional object to be printed; and printing said three-dimensional object. The portions of the carpet that protrude out of the boundaries of the base of the three-dimensional object are coated with one or more layers of support material to help keep the carpet flexible and adhesive in texture.

Provided is a mold production method whereby a UV curable composition can be molded with good precision through optical imprinting. The mold production method of the present invention is a method of producing a mold including an elastic body and used for molding a UV curable composition, and the method includes simulating deformation associated with curing of the UV curable composition using finite element analysis using [1] curing shrinkage of the UV curable composition and [2] deformation of the mold associated with the curing shrinkage, and designing the mold in accordance with a result of the simulation.

Particular embodiments of the invention include apparatus and methods for compensating for shrinkage of a polymeric material in a mold during curing operations. Embodiments of the method include providing a mold comprising a molding cavity defining an interior mold volume separated from an exterior environment and introducing a volume of polymeric material into the molding cavity. Such methods further include impeding the development of a void in the volume of polymeric material by, either: isolating the volume of polymeric material within the molding cavity from the exterior environment, or reducing the interior mold volume of the molding cavity to at least substantially consume a volume of polymeric material shrinkage. Such methods further include curing the polymeric material to form a molded polymeric form.

Methods of producing an additive manufactured part with a smooth surface finish include providing a spinning device that has a platform. The part is secured to the platform, where the part is at least partially wetted with uncured resin from a resin pool. The platform is rotated, where a first portion of the uncured resin is retained on the part and a second portion of the uncured resin is removed. The part is cured after the rotating. In some embodiments, methods include creating a compensated design for a part by modifying a desired design to compensate for a first portion of an uncured surface finish material to be retained on the part, and forming the part with an additive manufacturing process according to the compensated design.

An embodiment relates to a vehicular lamp and a vehicle comprising the same, the vehicular lamp comprising: a lens portion; and a light source portion for emitting light toward the lens portion, wherein the lens portion comprises a body having least one curved surface and a film portion arranged on one side of the body so as to generate a 3D stereoscopic image using the light, and the lens portion is injected in an in-mold labelling (IML) type using a mold. Accordingly, the design-related degree of freedom can be improved, thereby providing an enhanced aesthetic appearance, and the manufacturing process can be simplified, thereby improving the productivity.

Provided are a vehicle seat member in which even when a foamed resin molded body forming the vehicle seat member shrinks after being demolded, influence of the shrinkage behavior on a frame member embedded in the foamed resin molded body can be prevented, and thus a change in the position of a protrusion, which serves as a part to be anchored to a vehicle body, of the frame member can be prevented, whereby the vehicle seat member can be attached to the vehicle body side easily and reliably, and a vehicle seat including such a vehicle seat member. A vehicle seat member includes a foamed resin molded body and a frame member integrally formed therewith, the frame member including a body portion embedded in the foamed resin molded body and protrusions each protruding from the body portion and having a tip end protruding outward from the foamed resin molded body.

An apparatus for measuring a degree of cure and a specific volume of a packaging material is provided, including: an upper load module configured for driving the rotation of an upper ball screw via an upper servo motor such that a force plate coupled to the upper ball screw moves downward and is thus positioned; a lower load module having a lower ball screw operating and moving via a lower servo motor such that a load joint group connected to the lower ball screw generates a corresponding displacement; an upper film cavity module connected to the upper load module; and a lower film cavity module disposed on the lower load module. The displacement of the load joint group enables a push rod to move upward. A heating pipe keeps constant the temperature of a subject to be measured in a cavity of the lower film cavity module.

An example apparatus for fabrication of a co-cured composite assembly includes a layup tool body with a cavity, a thermal expansion insert inserted into the cavity of the layup tool body and a first uncured composite part of the composite assembly is positioned onto the thermal expansion insert, and a solid internal mandrel configured for insertion onto the first uncured composite part. During curing, the first uncured composite part compacts and reduces in thickness while the solid internal mandrel and the thermal expansion insert each increase in size to apply pressure to the first uncured composite part.

The present invention discloses a biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing method and device. The method is characterized in that: the conveying volume of materials formed between two or three engaged eccentric rotors, which are formed by spiral structures and eccentric cylindrical structures connected alternately, and an inner surface of a stator changes periodically along the axial direction and the radial direction of the rotors, achieving the volume pulsed deformation plasticizing and conveying of the materials during engaged rotation of the two or three engaged eccentric rotors. The device's eccentric rotors are all formed by length-varying spiral structures and eccentric cylindrical structures connected alternately; the spiral structures of the eccentric rotors are engaged to each other; the axial positions of eccentric cylindrical structures of the two or three rotors are the same. The present invention can implement extrusion of polymer materials or implement, in combination with a plunger injection unit, injection molding of polymer materials, and have many features such as desirable mixing and plasticizing effects for materials, a short thermo-mechanical course, low power consumption, and wide adaptability.

In an example method of forming a waveguide film, a photocurable material is dispensed into a space between a first mold portion and a second mold portion opposite the first mold portion. Further, a relative separation between a surface of the first mold portion with respect to a surface of the second mold portion opposing the surface of the first mold portion is adjusted. The photocurable material in the space is irradiated with radiation suitable for photocuring the photocurable material to form a cured waveguide film. Concurrent to irradiating the photocurable material, the relative separation between the surface of the first mold portion and the surface of the second mold portion is varied and/or an intensity of the radiation irradiating the photocurable material is varied.