Method of making concrete switch cross ties

Details Method of making concrete switch cross ties Method of making concrete switch cross ties

1992-04-08

1993-07-13

Aftergut, Karen

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

294011, 2940209, 2940214, 2940218, 156 94, 264 36, 264 401, 264228, 264277, 264278, 264279, 264316, 264333, 264334, 264338, B29C 3340, B32B 3500

Patent

active

052271129

ABSTRACT:
A switch cross tie is made in a mold having a base plate formed with a plurality of holes in a predetermined pattern corresponding to a particular type of concrete switch cross tie by first overlying the entire base plate of a mold with a covering sheet provided with markings in a pattern corresponding to that of the holes needed for another particular type of concrete cross ties. This covering sheet overlies and blocks all the holes formed in the base plate and it is fixed in place atop the base plate. Then the operator or a computer-guided drill press cuts through the covering sheet and into the base plate at each of the markings to form thereat a respective new hole. Each such new hole is fitted with an anchor, and the mold is filled with concrete over and around the anchors with the covering sheet blocking all the holes other than the new holes. It is important that the covering sheet be sufficiently strong to inhibit entry of concrete through it into any of the holes other than the new holes. The concrete is allowed to cure or set and then the set concrete and the anchors are removed from the mold as a tie with anchors imbedded in it at locations corresponding to the new holes.

REFERENCES:
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patent: 4948099 (1990-08-01), Knodel et al.
patent: 5124093 (1992-06-01), Schimpff

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