Concrete block molding machinery
AssigneeBesser Company
InventorsHoward N. Lumsden, Lee F. Marzean, Donald R. Andor, Michael Ponik
Life of this patent
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Abstract
A molding machine for a concrete mix includes a frame with a vibratible mold having a vertical through cavity with hollow cores extending downwardly in the mold cavity. A pallet receiver with a pallet thereon is movable upwardly to close the bottom of the cavity. Core tops have openings therein and ventilation pins are receivable to block air passage through the core top openings when the pallet is in mold closing position. Cups with bottom openings are in the cores below the top openings to receive and guide the pins and passageways around the pins permit suction-braking air to move past the pins to the cup bottom openings when the pins move downwardly away from the core top openings.
Claims10
In a molding machine for a concrete mix having:
- a frame;
- a mold having a through cavity with hollow cores, having tops, extending downwardly into the mold cavity;
- a pallet receiver with a pallet thereon movable from a remote position upwardly to close the bottom of the mold cavity and permit filling of the mold cavity with said mix around said cores from above;
- said core tops having openings therein and upwardly and downwardly movable ventilation pins receivable to block air passage through said top openings when the pallet is in mold closing position;
- the improvement wherein:
- a. guide cups with side walls and bottoms having bottom openings to pass said pins are provided in said cores below said top openings to receive and guide said pins in relative movement with said cups;
- and
- b. passageways around said side walls and pins to permit suction-breaking air to move past said pins to said cup bottom openings when the pins move downwardly in said cups away from said core top openings.
For use in a molding machine for a concrete mix having:
- a frame;
- a mold having a vertical through cavity with hollow cores having tops extending downwardly into the mold cavity;
- a pallet receiver with a pallet thereon movable from a remote position upwardly to close the bottom of the mold cavity and permit filling of the mold cavity with said mix around said cores from above;
- said core tops having openings therein;
- the mechanism comprising:
- a. a hollow core guide cup assembly including a ventilation pin and a guide cup with side wall portions and a lower wall portion with an opening to pass said ventilation pin provided for one of said cores to receive and guide said pin in relative movement with said guide cup;
- and
- b. at least one passageway around said guide side wall portions:and said pin to permit suction-breaking air to move past said pin to said cup guide lower wall opening when said pin moves downwardly in said guide cup away from one of said core top openings;
- and
- c. yieldable mechanism adapted to move said pin downwardly when said pallet moves downwardly.
Dependencies are inferred from the claim text.