Systems and methods are provided for demolding a composite part from a mandrel. The method includes mechanically coupling a first arm of an extraction tool to a first arcuate portion of a composite part that has been hardened onto a mandrel, mechanically coupling a second arm of an extraction tool to a second arcuate portion of the composite part, and separating the composite part from the mandrel by iteratively performing the following operations until the composite part no longer contacts the mandrel: elastically straining the first arcuate portion of the composite part via the first arm, and elastically straining the second arcuate portion of the composite part via the second arm.

Systems and methods are provided for demolding a composite part from a mandrel. The method includes mechanically coupling a first arm of an extraction tool to a first arcuate portion of a composite part that has been hardened onto a mandrel, mechanically coupling a second arm of an extraction tool to a second arcuate portion of the composite part, and separating the composite part from the mandrel by iteratively performing the following operations until the composite part no longer contacts the mandrel: elastically straining the first arcuate portion of the composite part via the first arm, and elastically straining the second arcuate portion of the composite part via the second arm.

Systems and methods are provided for demolding a composite part from a mandrel. The method includes mechanically coupling a first arm of an extraction tool to a first arcuate portion of a composite part that has been hardened onto a mandrel, mechanically coupling a second arm of an extraction tool to a second arcuate portion of the composite part, and separating the composite part from the mandrel by iteratively performing the following operations until the composite part no longer contacts the mandrel: elastically straining the first arcuate portion of the composite part via the first arm, and elastically straining the second arcuate portion of the composite part via the second arm.

A retaining unit includes: a movable ejector pin; a ring-shaped member used in a fixed state; and a ball plunger directly attached to the ejector pin or fixed to a fixing member attached to the ejector pin. The ball plunger is configured to press the ring-shaped member and engage the ejector pin with the ring-shaped member. When a force at a predetermined level or higher is applied to the ejector pin in a movement direction of the ejector pin, the engagement with the ring-shaped member is released so that the ejector pin is allowed to move. The ball plunger is incorporated into the ejector pin or the fixing member so as to be unitized together.

Provided is a method of making a three-dimensional object, which method may include the steps of: (a) producing an intermediate object (21) from a dual cure polymerizable liquid by additive manufacturing, the intermediate object having the shape of the three-dimensional object in warped or distorted form; (b) optionally washing the intermediate object; then (c) contacting the intermediate to a form (22), which form has a shape corresponding to the three-dimensional object, and with the intermediate conformed to the shape of the form; then (d) further curing the intermediate object in contact with the form to produce the three-dimensional object (24) under conditions in which the three-dimensional object retains a shape conformed to the form after separating therefrom; and then (e) separating the three-dimensional object from the form.

A method of producing an in-situ molded concrete object includes positioning a form on a substrate. The form can include a leg portion, a face portion, and a frangible portion. The frangible portion can connect the leg portion to the face portion. The method includes coupling the leg portion to the substrate to create a container open on at least one side. The method also includes pouring concrete into the container. The frangible portion can be fractured to separate the face portion from the leg portion.

Fluid transfer assemblies for transferring fluid into or out of a single vessel and distributing the fluid to multiple other vessels are provided. The fluid transfer assemblies are customizable, substantially aseptic, and single-use. The fluid transfer assemblies may be manufactured by solidifying polymeric materials to form a body around a mandrel with protrusions engaged to fluid conduits and leaving recesses in the solidified polymeric material to stretch the resultant body and remove the mandrel with protrusions. The resultant fluid transfer assembly may be surrounded by a rigid housing and valves may be engaged with the conduits and/or body to control the fluid flow within the fluid transfer assembly.

A method for forming a three-dimensional object by extruding ink droplets from ink-jet heads includes forming an inner build region of the object. A colored region is formed outside of the inner build region so as to color the object. A support region is formed outside of the colored region so as to support the object while the object is being formed. An intermediate region is formed between the inner build region and the colored region. The intermediate region is formed in such a manner that affinity between the intermediate region and the inner build region and affinity between the intermediate region and the colored region are higher than affinity between the colored region and the support region.

A mold for forming a joint spacer device or a part thereof includes a rigid container body having a first perimeter profile delimiting a first molding surface configured to shape a first portion of the joint spacer or part thereof; and a rigid cover provided with a second perimeter profile delimiting a second molding surface configured to shape a second portion of the joint spacer or part thereof. The rigid container body and the rigid cover are removably engageable to each other, at the first and the second perimeter profile, so as to delimit a cavity corresponding to the external configuration of the joint spacer or part thereof. The mold includes a weakening system on the rigid container body and on the rigid cover, making them separable into parts to enable the extraction of the spacer device or part thereof, molded therebetween.

An undercut processing mechanism that is installed in a molding die assembly configured to form a molded article having an undercut portion so as to allow demolding of the undercut portion, the undercut processing mechanism comprising: a pushing piece movable in a demolding direction of the molded article; a support element fixed to the pushing piece or formed so as to be integrated with the pushing piece and capable of supporting the undercut portion during movement of the pushing piece; a sliding piece configured to be slidable relative to the pushing piece and to move, in conjunction with movement of the pushing piece, in a direction intersecting the demolding direction of the molded article; and a retaining piece configured to retain the sliding piece such that the sliding piece is slidable.