Twin Block Concrete Sleeper

Procedures of Twin Block Concrete Sleeper:
(1) assembling steel wire or steel reinforcement in the model, 
(2) drawing steel wire or steel reinforcement on the model, 
(3) installing accessories in the model, 
(4) pouring concrete in the model,
(5) ordinary vibration molding (one vibration), 
(6) loading vibration molding (second vibration), 
(7) steam curing, 
(8) relaxing steel wire or steel bar, 
(9) cutting steel wire or steel bar along the end of double-block sleeper,
(10) demoulding, 
(11) clear mold, and spray demoulding agent.