초록 ▼

A process for making a mineral fiber artificial log that can be used in vented and unvented gas fireplaces, fireplace inserts, and free-standing gas fire room heater to simulate the appearance of a real burning log. The process utilizes a screen mold formed from a pattern that can be made to give th

A process for making a mineral fiber artificial log that can be used in vented and unvented gas fireplaces, fireplace inserts, and free-standing gas fire room heater to simulate the appearance of a real burning log. The process utilizes a screen mold formed from a pattern that can be made to give the desired exterior configuration and size for the formed log. The screen mold is placed in an outer porous jacket and then in a vacuum chamber. A slurry of the formulation containing mineral wool fibers, a suitable high temperature binder, and water is drawn into the mold while contained in the vacuum chamber, so liquid is drawn through the mold and mineral fibers are trapped in the mold. The log is formed to the size and shape of the mold. Once molded, the log is removed from the mold, dried in an oven, treated with a suitable rigidizing exterior coating, and again oven dried. The log is painted suitably, dried again, and packaged for sale.

대표청구항 ▼

[ What is claimed is:] [1.] A method of forming a mold comprising a three dimensional pattern for a simulated fireplace log, comprising the steps of:forming an exterior configuration of a block of material to a general shape of the simulated fireplace log;forming elongated grooves in a surface of th

[ What is claimed is:] [1.] A method of forming a mold comprising a three dimensional pattern for a simulated fireplace log, comprising the steps of:forming an exterior configuration of a block of material to a general shape of the simulated fireplace log;forming elongated grooves in a surface of the block of material;filling the elongated grooves with elongated ribs formed of desired sizes and extending outwardly from the block of material; andplacing a layer of mold forming material over the block of material to form the mold by causing the elongated ribs to adhere to the mold forming material as the mold forming material is removed from the block of material thereby allowing elongated grooves to be formed in a molded simulated fireplace log formed in the mold corresponding to the elongated grooves formed in the block of material.