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Blue fiber cement siding HardiePanel on design-build addition, Ithaca NY. Fiber cement siding (also known as "fibre cement cladding" in the United Kingdom, "fibro" in Australia, and by the proprietary name "Hardie Plank" in the United States) is a building material used to cover the exterior of a building in both commercial and domestic applications.
No pilot hole was used on the left. Punching is a forming process that uses a punch press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that come in sheet form, including sheet metal, paper, vulcanized fibre and some forms of plastic sheet.
During the cutting process, a fundamental parameter to be considered is the nesting layout, which is the arrangement of the different shapes to be cut from the fabric in order to reduce the scraps. [citation needed] The patterns are generally created digitally and, when possible, given to a CNC machine or, otherwise, replicated by hand. [1]
The selection criteria of all process parameters are governed by the sheet thickness and by the strength of the work-piece material being pierced. The punch/die clearance is a crucial parameter, which determines the load at the cutting edge of the tool, commonly known as point pressure. Excessive point pressure can accelerate tool wear.
Notching: A notch is cut into the open end of the part. This notch can be round, square, or shaped. Rib Forming: Rib forming involves creating an inward or outward protruding rib during the drawing process. Side Piercing: Holes are pierced in the side wall of the drawn part. The holes may be round or shaped according to specifications.
Register ring—Aligns injection molding machine screws with the injection mold. Usually made of case-hardened, medium carbon steel material (CHMCS). Sprue bushing — The bush has a taper hole of 3° to 5° and is usually made of CHMCS. The material enters the mold through the sprue bush.
The pattern is lifted from the sand, leaving a molding cavity. A passageway for metal to enter the mold, called a "gate", is then cut from the sprue hole to the void left by the pattern, and a runner is cut from the sand to allow metal to flow into the riser. The flask is then put back together, and metal can be poured into the mold.
Cement board is composed of aggregated Portland cement with a glass-fiber mesh on the surfaces. This 5 ⁄ 16 inch (7.9 mm) thick cement board is designed as an underlayment for tile floors.