Hollow box forming die

Abstract

A hollow box forming die comprises side wall dies (1), a bottom die (2), and a cover plate die (3). When the hollow box is formed, the cover plate die (3) is covered on the side wall dies (1), breaches (11) used for bar passing are formed in the upper end of the side wall dies (1), an electric resistance rod (5) which is connected with a power supply is arranged in the middle of the bottom die (2), and a rod die (4) is sleeved on the electric resistance rod (5). The hollow box forming die is characterized in that the rod die (4) is made of water-absorbing expansion materials, and a water proof film (10) is wrapped on the wall body of the rod die (4) after the rod die (4) is saturated through water absorption. When the hollow box is formed, the rod die made of the water-absorbing expansion materials absorbs water to be saturated, the water proof film is arranged on the outer side of the rod die which is saturated, and slurries are laid or daubed or sprayed. When a blank is made, the side wall dies are placed on the bottom die, the cover plate die is covered on the side wall dies, so that the side wall die can be closely connected with the bottom plate die and the blank on the cover plate die, meanwhile, due to the fact that breaches used for rib passing are formed in the upper end of the side wall dies, steel bars and steel wires and the like can be laid in the slurries of a cover plate, the steel bars, the steel wires and the like expose out of the side wall, and a product is produced after maintenance and mold release.

Description

(1) Technical field [0001] The invention relates to a hollow box molding die. (2) Background technology [0002] At present, cast-in-place reinforced concrete hollow slabs, especially the non-core-pulling hole-forming process of cast-in-situ reinforced concrete hollow slabs, are generally filled with thin-walled tubes or thin-walled boxes, which can meet the needs of various hollow slabs for evacuating concrete. The applicant applied for an invention patent with the application number 99115665.X and the title "fiber-reinforced thin-walled pipe (box) for reinforced concrete filling and its manufacturing method" on November 29, 1999, and the application number 99115666.8 , the invention patent titled "fiber-reinforced thin-walled box for filling cast-in-place reinforced concrete and its manufacturing method", the thin-walled tube or thin-walled box can be open, and if it has a seal, it can be closed A thin-walled tube or a closed thin-walled box; the mold used in its manufact...

AI Technical Summary

Problems solved by technology

Such as the positive mold, as can be seen from their drawings, it includes a side mold surface and a lower mold surface (or a top mold surface), and the side mold surface and the lower mold surface form a male mold, which is the male mold of the overall template. In the actual use process, it is inconvenient to demould, and the open thin-walled tube or thin-walled box is easy to be damaged, and it is difficult to produce thin-walled boxes with perforated tubes with this mold. Therefore, a new type of mold shell component molding is developed. The mold is urgently needed

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