Apparatus for insulating building blocks

• US 4,295,810 A
• Filed: 06/05/1979
• Issued: 10/20/1981
• Est. Priority Date: 06/10/1978
• Status: Expired due to Term

• Current Assignee: Veit Dennert KG Baustoffbetriebe (Dennert Management Service GmbH)
• Original Assignee: Veit Dennert KG Baustoffbetriebe (Dennert Management Service GmbH)
• Inventors: Dennert, Heinz, Dennert, Hans V.
• Primary Examiner(s): Anderson, Philip
• Application Number:
  US06/045,732
• Time in Patent Office: 868 Days
• Field of Search: 425/4 R, 425/145, 425/166, 425/110, 264/51, 264/45.4, 264/46.6, 264/109, 264/DIG. 10, 264/DIG. 11, 264/40.2, 52/309.4, 52/309.12, 52/309.13, 52/405, 52/743
• US Class Current: 425/110
• CPC Class Codes: B28B 11/042 with insulating material
• CPC Class Codes: B28B 11/043 filling cavities or chambers of hollow blocks
• CPC Class Codes: B29C 44/18 Filling preformed cavities B29C44/1204 takes precedence
• CPC Class Codes: B29C 44/343 by using pipes to direct the steam inside the mould
• CPC Class Codes: B29K 2105/048 Expandable particles, beads or granules
• CPC Class Codes: E04B 2002/0293 solid material
• CPC Class Codes: E04C 1/41 composed of insulating material and load-bearing concrete, stone or stone-like material
• CPC Class Codes: Y10S 264/07 Binding and molding cellular particles
• CPC Class Codes: Y10S 264/10 Foamed polystyrene mold filling
• CPC Class Codes: Y10S 264/11 Molding styropor using steam probes-batch

Abstract

A building block having at least one chamber therein which is filled with a foamed plastic material consisting of particles interconnected at their surfaces to form gas-permeable interstices. The block is formed by filling the chamber with a loose fill of the foamed plastic material and then fusing the particles to each other by blowing hot gas through an injection lance inserted in the fill.

Claims

1. Apparatus for producing building blocks comprising

conveying means for transporting building blocks each having at least one hollow chamber therein,

a filling station for filling the chambers of said building blocks with particles of preformed thermoplastic synthetic material,

a fusing station for fusing the surfaces of said particles of thermoplastic synthetic material together, and

synchronizing means for controlling the movements of said conveying means, filling station and fusing station to fill the chambers of said building blocks with said particles of thermoplastic synthetic material and then fuse said particles together.

2. The apparatus defined in claim 1 wherein said conveying means is a conveyor belt.

3. The apparatus defined in claim 1 wherein said filling station comprises a storage container having a lower side for storing said particles of preformed thermoplastic synthetic material, and a plurality of fill pipes attached to the lower side of said container and projecting therefrom for filling each of the chambers in said building blocks with said particles, said blocks being positioned so that each of the chambers is below an associated fill pipe.

4. The apparatus defined in claim 3 wherein each of said fill pipes is provided with an upper and a lower closing slide, the volume of each pipe between said upper and lower slides corresponding to the quantity of particles to be placed in the associated fill pipe.

5. The apparatus defined in claim 4 which further comprises electromagnetic means for moving said upper and lower slides.

6. The apparatus defined in claim 3 wherein said filling station further comprises a shaking device to provide uniform filling of said fill pipes.

7. The apparatus defined in claim 1 wherein said fusing station comprises a hot gas distributing chamber, a hot gas inlet connected thereto, a gas valve for controlling the flow of hot gas into said hot gas distributing chamber, and at least one injection lance attached to said hot gas distributing chamber for injecting hot gas into the particles of preformed thermoplastic synthetic material in the chambers of said building blocks.

8. The apparatus defined in claim 7 wherein said injection lance comprises a pipe having a jacket closed at its end remote from said hot gas distributing chamber, said jacket being provided with nozzle-like bores distributed over its circumference and height.

9. The apparatus defined in claim 8 wherein said jacket is cylindrical.

10. The apparatus defined in claim 8 wherein said jacket is conically tapered.

11. Apparatus as defined in claim 1 wherein said conveying means is movable in the horizontal direction to transport said building blocks from said filling station to said fusing station, and wherein said filling and fusing stations are moveable in the vertical direction.