The present disclosure describes three-dimensional printing kits, systems for three-dimensional printing, and methods of three-dimensional printing. In one example, a three-dimensional printing kit can include a particulate build material and a binding agent. The particulate build material can include metal particles. The binding agent can include a polyhydroxy polyol and a water-dispersible blocked polyisocyanate having multiple blocked isocyanate groups. The blocked isocyanate groups can include a blocking group bonded to the carbon atom of the blocked isocyanate group through a labile bond breakable by heating to a deblocking temperature. Breaking the labile bond can produce a released blocking group reacted with hydrogen and an isocyanate group.

Simulated anatomical components, such as simulated vascular vessels, produced by a method that includes forming an anatomical component mold from a soluble polymer such that the mold defines an interior void of the simulated anatomical component. One or more layers of an elastomeric material is applied around the anatomical component mold and the material is allowed to cure to form a wall of the simulated anatomical component. At least a portion of the mold is dissolved to form a passage for liquid within the simulated anatomical component. Simulated anatomical components are connectable to other components of a surgical simulation system and can be modularized.

A method for manufacturing a part for an aircraft seat includes positioning a heating frame around a stacked structure, locally heating an edge of the stacked structure using a heating frame, externally heating the entire stacked structure, positioning the stacked structure inside a thermoforming mould provided with cutting punches, closing the thermoforming mould and applying a vacuum to the interior of the thermoforming mould, to simultaneously perform, during the same step of shaping the first cover and the second cover, a step of heat sealing an edge of the first cover to an edge of the second cover, bonding the first cover and the second cover to the foam core, and cutting the stacked structure along the circumference thereof using cutting punches.

The present invention regards a moulding unit for producing a support element for the human body, such as a vehicle seat.

A hot to cold runner system for a golf ball injection mold is disclosed. The hot to cold runner system includes a hot runner for supplying layer-forming material in a molten state, the hot runner including a heated manifold having a hot runner drop connected thereto, and a cold runner operatively connected to the hot runner drop such that the cold runner is in fluid communication with the hot runner. The cold runner injects the material into a mold cavity to form a golf ball layer over a core. Methods of forming a golf ball layer by injection molding using the hot to cold runner system are also disclosed.

A microcellular shoe stiffener has at least one adhesive layer coextruded with and carried on a stiffener core. A liquid, such as liquid nitrogen, is introduced into the extruder for the stiffener core to produce a closed cell foam with a gaseous component. The gas reduces the weight and cost of the stiffener without significantly reducing stiffness and resiliency.

A process for forming a register box has a body formed with a plurality of side panels arranged in a generally square or rectangular configuration with a wall extending transverse to the side panels. A plurality of circular areas are cut into the wall. An expandable polymeric foam material is introduced into an interior of the body. The body is positioned in a fixture such that the wall is juxtaposed against a surface of the fixture. A plug is inserted into the interior of the body. The expandable polymeric foam material is expanded in the interior of the body such that the expandable polymeric foam material solidifies across the wall and around the plug. The plug is then removed from the body and the body is then removed from the fixture.

Embodiments of the present disclosure provide a recoil pad making method and a method of using the same. According to certain embodiments, a recoil pad making method includes the steps of providing a base member attached to a first portion of a cushion member, shaping an amorphous hardening material on a first surface of the first portion to form a second portion of the cushion member, and shaping, prior to hardening of the amorphous hardening material, the amorphous hardening material around a portion of a shoulder of a user to create a second surface of the second portion that has a shoulder facing contour that matches a contour of the portion of the shoulder. The base member configured to be mounted to a buttstock of a gun. The first portion of the cushion member is pre-cured on the base member.

Various embodiments disclosed relate to a surfacing film. The surfacing film includes a base layer. The base layer includes a thermoplastic polyurethane film comprising a reaction product of a reaction mixture of a diisocyanate, a polyester polyol having a melting temperature of at least about 30 C.; and a diol chain extender. There are many reasons to use the surfacing film including easier and more cost effective manufacturing of the surfacing film by directly extruding the base layer by mixing the reaction mixture in an extruder. Another reason to use the surfacing film is that the film has improved resistance to discoloration. Another reason to use the film is that the film shows good toughness.

Process and mold embodiments are described herein for creating polyurethane molds that allow for the production of manhole bases.