초록 ▼

A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped wit

A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.

대표청구항 ▼

A lightweight beam mold having a bottom and side walls formed froma single panel of rigid plastic and with the side walls hinged to the bottom for movement between beam-forming and beam-release positions by integral hinge elements defined by elongate sections of the panel extending for the full leng

A lightweight beam mold having a bottom and side walls formed froma single panel of rigid plastic and with the side walls hinged to the bottom for movement between beam-forming and beam-release positions by integral hinge elements defined by elongate sections of the panel extending for the full length of the panel between the bottom and side walls and which are of sufficiently reduced thickness to be flexible, a pair of separate end walls each having a generally U-shaped channel removably attachable one to each end of the bottom and side walls when in beam-forming position, and said panel having at least one smooth surface to have smooth interior surfaces for the bottom and side walls and locking means to lock the end walls to the bottom and side walls.