Apparatus for removing the upper waste layer resulting in cutting plastic porous concrete blocks or the like

• US 5,513,945 A
• Filed: 12/20/1994
• Issued: 05/07/1996
• Est. Priority Date: 12/31/1993
• Status: Expired due to Fees

• Current Assignee: Hebel AG (CRH PLC)
• Original Assignee: Hebel AG (CRH PLC)
• Inventors: Hartmann, Wilfried, Ansorge, Eberhard
• Primary Examiner(s): Keenan, James W.
• Application Number:
  US08/359,577
• Time in Patent Office: 504 Days
• Field of Search: 414/796.2, 414/796.5, 414/796.9, 414/609, 414/618, 414/626, 414/630, 294/61, 294/120, 271/18.3
• US Class Current: 414/626
• CPC Class Codes: B26D 7/1836 by pulling out
• CPC Class Codes: B28B 17/00 Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping moulds B28B7/00; after-treatment B28B11/00; feeding or discharging B28B13/00; arrangements for embedding elements in the material B28B23/00

Abstract

The apparatus for removing the waste layer arising in cutting porous concrete blocks comprises a beam (1) which extends above the porous concrete block in its longitudinal direction and can be raised and lowered, and at least two horizontal support frames (2, 2'"'"') mounted thereon and movable in height, which are arranged in pairs opposite one another to the two sides of a vertical central plane (M) of the beam (1) and beneath the same. A plurality of spikes (5, 5'"'"') which can be stuck into the waste layer are provided on the underside of each support frame (2, 2'"'"') and are aligned with their points facing down at an angle. All spikes (5) of the first support frame (2) of each frame pair (P) are parallel to one another and inclined at an acute angle (μ) to the longitudinal central plane (M) and all spikes (5'"'"') of the opposite second support frame (2'"'"') are parallel to one another and inclined at an opposite acute angle (μl) to the longitudinal central plane (M). Each support frame (2, 2'"'"') is movable relative to the beam in the direction (B or C) of its spikes (5, 5'"'"').

Claims

1. An apparatus for removing a waste layer arising in cutting porous concrete blocks comprising:

a beam which extends in a longitudinal direction above the porous concrete block and can be raised and lowered;

at least first and second horizontal support frames supported by said beam on an underside thereof which are movable in height by a motor, said first and said second support frames being arranged in at least one frame pair opposite one another on the two opposite sides of a vertical central plane of said beam which extends longitudinally along said beam;

support rails extending perpendicular to said vertical central plane and mutually spaced a predetermined distance apart from one another in said longitudinal direction to define gaps therebetween, at least a first plurality of said support rails being arranged on an underside of said first support frame and at least a second plurality of said support rails being arranged on an underside of said second support frame, said first plurality of said support rails being received in said gaps between said second plurality of said support rails, and vice versa; and

a plurality of spikes which can be inserted into the waste layer and protect from said support rails on said underside of each said support frame, said spikes each terminating at a point and being aligned with said points facing down at an angle, wherein all of said spikes of said first support frame of each said frame pair are parallel to one another and inclined at a first acute angle relative to said vertical central plane and all of said spikes of said second support frame opposite said first support frame are parallel to one another and inclined at a second acute angle relative to said vertical central plane which is opposite said first acute angle, each said support frame being movable relative to said beam in the direction of said spikes projecting

2. The apparatus according to claim 1, wherein said support rails project beyond mutually facing longitudinal sides of said support frames of each said frame pair.

3. The apparatus according to claim 1, wherein each said support rail includes a spike strip releasably attached thereto, each said spike strip including a plurality of said spikes which are inclined obliquely relative to said spike strip and are uniformly spaced from one another in a row on said spike strip.

4. The apparatus according to claim 3, wherein each said support rail has a C-shaped cross sectional shape which defines an opening on an underside thereof and defines an interior channel having an open end, said spike strip being inserted from said open end into said interior channel.

5. The apparatus according to claim 4, wherein said spikes are fitted from above in oblique bores in said spike strips and have heads which abut on an inside surface of said support rails.

6. The apparatus according to claim 1, wherein said spikes are inclined at said first and said second angles relative to said vertical central plane of 25°

to 35°

.

7. The apparatus according to claim 1, wherein said spikes are each about 200 mm long.

8. The apparatus according to claim 7, wherein said spikes each have a diameter of 2.5 to 5 mm.

9. The apparatus according to claim 1, which includes means defining a stroke of each support frame through which each said support frame is movable in the direction of said spikes projecting therefrom, said stroke being adjustable.

10. The apparatus according to claim 1, wherein each said support frame has a guide rod which is inclined at the same acute angle relative to said vertical central plane as said spikes projecting from said support frame, a correspondingly inclined guide bush being provided for each said guide rod on said beam which said guide bush slidingly receives said corresponding guide rod.

11. The apparatus according to claim 1, wherein a stripper is provided below said support frames, said stripper having apertures for passage of said spikes therethrough, wherein said spikes can be withdrawn fully upwards out of said apertures to strip off waste layer being removed thereby.

12. The apparatus according to claim 11, wherein said stripper comprises a substantially horizontal sheet metal plate.

13. The apparatus according to claim 12, wherein a foam rubber sheet is provided on an underside of said sheet metal plate.

14. The apparatus according to claim 11, wherein said stripper is connected to said beam by vertical supports.

15. The apparatus according to claim 1, wherein a plurality of said frame pairs are arranged alongside each other in said longitudinal direction along said beam.

16. The apparatus according to claim 15, wherein at least said support frames on the one side of said vertical central plane are movable in synchronism.