A method of forming a polymer concrete CNG tank by forming an inflatable liner member composed of high density polymer impermeable to CNG; providing column forms as part of the liner member, the column forms having open tops and open bottoms and extending completely through the liner member; providing an outer form; positioning the liner member within the outer form with the column forms vertically oriented, the liner member being positioned to provide a gap between the liner member and the outer form; inflating the liner member; pouring polymer concrete about the liner member and through the column forms; and allowing the polymer concrete to cure. Reinforcement members may be positioned around the liner member and within the column forms prior to the step of pouring the polymer concrete.

This disclosure generally relates to methods and apparatus for 3D printing of highly viscous materials, especially to high amplitude ultrasonic vibration facilitated lower temperature 3D printing of highly viscous materials with a viscosity of at least 1000 Pa.Math.s.

An extruded thermoplastic product having a surface abrasive to insects. The extruded product is formed from a dry powder composition being comprised of a thermoplastic polymer, a plurality of pelletized diatomaceous earth, and a plurality of expandable microballoons. The composition is mixed and heated in an extrusion machine before being forced into a die of selected profile. Cooling the material immediately after being removed from the die allows the diatomaceous earth to remain at the surface of the material. The material with the surface abrasive to insects is used is used as a component in a product, such as conventional weatherization products, for placement in a building opening that insects use as ingress to the building. Products contemplated for use with the extrusion include door sweeps, door and window seals, and thresholds.

Methods for forming a Reuleaux shape from a material involving placing the material into a container, moving the container along an orbit until the motion of the container along the orbit causes the material to assume a Reuleaux shape, and removing the Reuleaux shape from the container. Devices for transforming material into a Reuleaux shape, including a wheel, a platter mounted on the wheel, and a container mounted on the platter. Kits for forming a Reuleaux pentagon, including material having sand and silicone and a hexagonal container.

Methods for forming a Reuleaux shape from a material involving placing the material into a container, moving the container along an orbit until the motion of the container along the orbit causes the material to assume a Reuleaux shape, and removing the Reuleaux shape from the container. Devices for transforming material into a Reuleaux shape, including a wheel, a platter mounted on the wheel, and a container mounted on the platter. Kits for forming a Reuleaux pentagon, including material having sand and silicone and a hexagonal container.

The improved mold assembly for cultured marble molding is provided. The mold assembly can comprise a male mold portion and a female mold portion. The assembly can further comprise a molding tool. The molding tool can have a side wall having an upper curved portion and a lower curved portion. The molding tool can have a bowl portion and an apron portion spaced from the bowl portion by a gap. The molding tool can be constructed from a flexible and/or soft material. The molding tool can facilitate molding of a countertop having at least one seamless curved edge and/or an at least partially seamless sink portion.

Method of producing a body (1) for bar feeders, wherein it comprises a first molding step (A) carried out with the aid of a first molding material (M1) in a mold (20) jointly with an overmolding step (B) of a countermold (50), the shape of the mold (20) and/or the shape impressions of the countermold being conceived to achieve in an integral way at least one structural and/or functional element of the said bar feeder.

Compositions suitable for three dimensional printing technology and methods for producing three dimensional printed articles and building materials are provided. The compositions are optimized for dimensional stability during and following various printing processes. In this manner, the compositions and articles printed or produced therefrom minimize any shrinkage or expansion following drying or curing of the printed or finished article and can be used to form accurate molds of digitally designed articles.

The improved mold assembly for cultured marble molding is provided. The mold assembly can comprise a male mold portion and a female mold portion. The assembly can further comprise a molding tool. The molding tool can have a side wall having an upper curved portion and a lower curved portion. The molding tool can have a bowl portion and an apron portion spaced from the bowl portion by a gap. The molding tool can be constructed from a flexible and/or soft material. The molding tool can facilitate molding of a countertop having at least one seamless curved edge and/or an at least partially seamless sink portion.

A sand based jewelry and methods of making sand based jewelry is provided. The jewelry having a quantity of sand mixed with a quantity of binding medium. The binding medium and sand mixture are capable of being solidified and mounted to a jewelry setting. The jewelry setting attached to a jewelry item.