Claims
- 1. A method of molding a plurality of curb sections, wherein each curb section is provided with front, top, rear, end and bottom surfaces, which front, top, rear, and bottom surfaces are at least partly in respective planes intersecting at lines which are parallel, and which end surfaces lie in planes which are parallel to each other and are normal to the planes of the front, top, rear and bottom surfaces, the planes of the end surfaces and the front and rear surfaces being vertical planes, and each curb section being provided with fastening projections extending from the rear surface, each fastening projection having a vertical component and extending to a top located at a position below the plane of the top surface of the curb section and having a vertical bore located centrally of each fastening projection and extending parallel to the rear surface of each curb section; the method including providing a horizontal platform, providing a mold frame movable between a molding position on the platform and a demolding position in a position spaced upwardly from the platform, moving the mold frame in a vertical axis into the molding position on the platform with the frame having vertical side walls forming a closed peripheral wall with an open top and a plurality of vertical dividing walls spaced apart and parallel to each other within the mold frame to form a plurality of mold cavities therein for casting of the curb sections, of which dividing walls alternating ones are provided with means defining vertically extending recesses for forming the fastening projections, and vertical cylindrical pin members mounted on shank is extending from the alternating dividing walls centrally of each vertically extending recess form forming the vertical bores in the fastening projections, pouring concrete into the mold cavities in the mold frame positioned on the platform in the molding position, pressing down on the concrete with a plurality of mold shoes, each mold shoe including mold plugs for forming the tops of the fastening projections on the curb sections being formed, vibrating the mold frame and platform to form the curb sections and demolding the formed curb section having fastening projections extending from the rear surfaces thereof with vertical bores located centrally of the fastening projections, by first raising the mold frame vertically and, in sequence, lifting the plugs and then removing the mold shoes, and then removing the formed curb sections.
- 2. An apparatus for casting a plurality of curb sections, each having front, rear, bottom, end and top walls and fastening projections spaced apart on the rear wall, each fastening projection including a vertical bore and a top surface spaced below the top wall of the curb section, the apparatus including a horizontal platform, a mold frame including a closed peripheral wall with an open top and a plurality of divider plates extending parallel to each other within the mold frame and spaced apart to from a plurality of mold cavities within the mold frame for casting of the plurality of curb sections, means for moving the mold frame including the divider plates vertically, means for forming the top wall of each curb section including a plurality of mold shoes, and means for moving the mold shoes vertically, alternating divider plates of the plurality of divider plates having means defining vertically extending recesses for forming the fastening projections on the rear walls of the curb sections, and vertical cylindrical pin members mounted on shanks extending from the alternating divider plates centrally of each vertically extending recess for forming the vertical bore in each fastening projection, the mold shoes being provided with plugs extending down from the mold shoes coincident with the vertically extending recesses in the alternating divider plates to form the top surfaces of the fastening projections spaced below the top walls of the curb sections.
Priority Claims (1)
Number |
Date |
Country |
Kind |
605565 |
Jul 1989 |
CAX |
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CROSS-REFERENCE TO RELATED APPLICATION
This is a divisional application of application Ser. No. 07/413,753, Sept. 28, 1989, Pat. No. 4,971,475.
US Referenced Citations (21)
Foreign Referenced Citations (2)
Number |
Date |
Country |
175038 |
Mar 1986 |
EPX |
664291 |
Jan 1952 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
413753 |
Sep 1989 |
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