US2632224A - Machine for molding concrete - Google Patents

Machine for molding concrete Download PDF

Info

Publication number
US2632224A
US2632224A US193885A US19388550A US2632224A US 2632224 A US2632224 A US 2632224A US 193885 A US193885 A US 193885A US 19388550 A US19388550 A US 19388550A US 2632224 A US2632224 A US 2632224A
Authority
US
United States
Prior art keywords
weight
mold
machine
concrete
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US193885A
Inventor
Matthijs E Leeuwrik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
N V Raatbouw
RAATBOUW NV
Original Assignee
RAATBOUW NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RAATBOUW NV filed Critical RAATBOUW NV
Priority to US193885A priority Critical patent/US2632224A/en
Application granted granted Critical
Publication of US2632224A publication Critical patent/US2632224A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
    • B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables

Definitions

  • One object of this invention is to provide an improved machine for producing concrete parts or articles by applyin a shaking operation.
  • the surface of the table upon which the mold for the article should be immovably fastened is larger than the face determined by the outer perimeter of the mold which does not project beyond the edge of the table, that the contact surface of the anvils or stoprails ranges between 2 and 5 per cent of the surface of the table, that the weight (X) of the article to be made inclusive of the weight of the mold bears a definite proportion to the weight (Y) of the table inclusive of all parts secured to and dropping along with said table, which proportion is determined by the equation:
  • the mold is so filled that a fresh layer of mortar is put in the mold only after the layer already present therein has been subjected to a shaking operation which has been continued until all air has disappeared from the said layer and the surface of said layer gleams owing to the water liberated from the concrete mortar.
  • a machine according to the invention is characterized by the fact that the face determined by the outer perimeter of the mold which does not project beyond the edge of the table, that the contact surface of the anvils or stoprails ranges between 2 and 5 per cent of the surface of the table, that the weight (X) of the article to be made inclusive of the weight of the mold bears a definite proportion to the weight (Y) of the table inclusive of all arts secured to and dropping along with said table, which proportion is determined by the equation:
  • Fig. 1 shows a graph representing the proportion 2 in which the weight X of the mold with the article 2, as well as the weight Y of the table i with the stop rails 3 and the securing champs H (see Figs. 2 and 3) have to satisfy.
  • the values X and Y in this equation represent hundreds of kilos.
  • the weight Y will be 202 kgs.
  • the jolting machine shown in Figs. 2 and 3 comprises besides a table i with stop rails 3, a base which stops the fall of the table and thus produces the jolts.
  • This base consists of rails l attached to a plate 5. This whole is borne by a heavy concrete block 6.
  • the rails 3 then bang on the rails 4.
  • the lift h of the table should range between 1/4 and 1/2-
  • the contact surface of the rails 3 and 4 should range between 2 and 5 per cent of the surface of the table.
  • This upper surface of the table 1 should be larger than the upper surface of the mold 2.
  • the filling of the mold with concrete '8 should be so effected that first a layer is put in the mold whereupon this is subjected to a shaking operation until water appears on top of this concrete, making it gleam. Only then a new layer of concrete may be put in the mold.
  • the mold 2 is immovably secured to the table I by means of clamps H.
  • the shaking frequency should range between and 300 jolts per minute.
  • a machine for producing concrete parts and articles by applying a shaking action comprising a table, a mold secured on the top surface of said table, the top surface of said table being larger than the outer perimeter of the mold which does not project beyond the edge of the 3 table. a base member, stop rails secured to said table and said base member, the contact surface of said stop rails being between 2 and 5 per cent of the surface of the table, the weight of the article to be made including the weight of the mold being in a definite proportion to the weight of the table including all parts secured to and dropable with said table in accordance with the equation:

Description

March 24, 1953 M. E. LEEUWRIK 2,632,224
MACHINE FOR MOLDING CONCRETE Filed NOV. 5, 1950 1 Ian: 24.350K X INVENTOR. ME. LEEUWRHK W, Lmd PM Pmoa msys Patented Mar. 24, 1953 UNITED STATES TET OFFICE MACHINE FOR MOLDING CONCRETE Application November 3, 1950, Serial No. 193,885
1 Claim.
One object of this invention is to provide an improved machine for producing concrete parts or articles by applyin a shaking operation.
As a result of the experiences and experiments of years it has been found that these objects can only be realized if precise directionswhich must be fulfilled simultaneously-are complied with.
In accordance with the above invention is characterized by the fact that the surface of the table upon which the mold for the article should be immovably fastened, is larger than the face determined by the outer perimeter of the mold which does not project beyond the edge of the table, that the contact surface of the anvils or stoprails ranges between 2 and 5 per cent of the surface of the table, that the weight (X) of the article to be made inclusive of the weight of the mold bears a definite proportion to the weight (Y) of the table inclusive of all parts secured to and dropping along with said table, which proportion is determined by the equation:
Y=0.18 (X+3.l9) 1.14
that the height of lift of the table ranges between M and that the frequency of the jolts ranges between 150 and 300 per minute, that the mold is so filled that a fresh layer of mortar is put in the mold only after the layer already present therein has been subjected to a shaking operation which has been continued until all air has disappeared from the said layer and the surface of said layer gleams owing to the water liberated from the concrete mortar.
A machine according to the invention is characterized by the fact that the face determined by the outer perimeter of the mold which does not project beyond the edge of the table, that the contact surface of the anvils or stoprails ranges between 2 and 5 per cent of the surface of the table, that the weight (X) of the article to be made inclusive of the weight of the mold bears a definite proportion to the weight (Y) of the table inclusive of all arts secured to and dropping along with said table, which proportion is determined by the equation:
that the height of lift of the table ranges between and that the frequency of the jolts ranges between 150 and 300 per minute.
The invention is illustrated hereinafter with reference to the drawing.
Fig. 1 shows a graph representing the proportion 2 in which the weight X of the mold with the article 2, as well as the weight Y of the table i with the stop rails 3 and the securing champs H (see Figs. 2 and 3) have to satisfy. The values X and Y in this equation represent hundreds of kilos.
If the weight X=l00 kgs., the weight Y will be 202 kgs.
If the weight X=500 kgs., the weight Y will be 1090 kgs. and if the weight X=1000 kgs., the weight Y will be 3018 kgs.
From this it appears that as X increases in magnitude the value Y increases at a more than proportional rate.
The jolting machine shown in Figs. 2 and 3 comprises besides a table i with stop rails 3, a base which stops the fall of the table and thus produces the jolts.
This base consists of rails l attached to a plate 5. This whole is borne by a heavy concrete block 6.
Against the lower side of the table rollers 8 are rotatively secured. Eccentric-shaped rollers 9 supported in a bearing block it, are located underneath the rollers 8. When the rollers 9 are rotated they will lift the rollers 8 and thus the table i. The rollers 9 have a cam-shaped edge for that purpose. After this edge has passed underneath the rollers 8, the rollers 8 and the table suddenly drop down.
The rails 3 then bang on the rails 4.
The lift h of the table should range between 1/4 and 1/2- The contact surface of the rails 3 and 4 should range between 2 and 5 per cent of the surface of the table.
This upper surface of the table 1 should be larger than the upper surface of the mold 2. The filling of the mold with concrete '8 should be so effected that first a layer is put in the mold whereupon this is subjected to a shaking operation until water appears on top of this concrete, making it gleam. Only then a new layer of concrete may be put in the mold. The mold 2 is immovably secured to the table I by means of clamps H.
The shaking frequency should range between and 300 jolts per minute.
The equation mentioned above as an essential condition relates to a parabola.
I claim:
A machine for producing concrete parts and articles by applying a shaking action comprising a table, a mold secured on the top surface of said table, the top surface of said table being larger than the outer perimeter of the mold which does not project beyond the edge of the 3 table. a base member, stop rails secured to said table and said base member, the contact surface of said stop rails being between 2 and 5 per cent of the surface of the table, the weight of the article to be made including the weight of the mold being in a definite proportion to the weight of the table including all parts secured to and dropable with said table in accordance with the equation:
4 lift of the table ranging between 4 inch and inch and the frequency of the jolts ranging between 150 and 300 per minute.
MATTHIJS E. LEEUWRIK.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,523,936 Easterday Jan. 20, 1925 ,193,847 Strong Mar. 19, 1940
US193885A 1950-11-03 1950-11-03 Machine for molding concrete Expired - Lifetime US2632224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US193885A US2632224A (en) 1950-11-03 1950-11-03 Machine for molding concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US193885A US2632224A (en) 1950-11-03 1950-11-03 Machine for molding concrete

Publications (1)

Publication Number Publication Date
US2632224A true US2632224A (en) 1953-03-24

Family

ID=22715414

Family Applications (1)

Application Number Title Priority Date Filing Date
US193885A Expired - Lifetime US2632224A (en) 1950-11-03 1950-11-03 Machine for molding concrete

Country Status (1)

Country Link
US (1) US2632224A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523936A (en) * 1922-04-04 1925-01-20 Tuerck Mackenzie Company Machine for molding plastic material
US2193847A (en) * 1936-12-10 1940-03-19 Pierce John B Foundation Method of producing molded concrete products and apparatus therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523936A (en) * 1922-04-04 1925-01-20 Tuerck Mackenzie Company Machine for molding plastic material
US2193847A (en) * 1936-12-10 1940-03-19 Pierce John B Foundation Method of producing molded concrete products and apparatus therefor

Similar Documents

Publication Publication Date Title
US2852932A (en) Tile and grouting assembly
US2632224A (en) Machine for molding concrete
US1625463A (en) Diamond lap
US2667664A (en) Method of facing concrete blocks with tile
US3595947A (en) Method of manufacturing structural elements
US2275989A (en) Process for producing resinous products
US2981330A (en) Pulp molding die
GB661780A (en) Improvements in or relating to moulds
DE880469C (en) Mass for molded shells
GB1247764A (en) Improvements in or relating to tools and method of manufacture thereof
GB708393A (en) Pulp molding dies
DE801325C (en) Method and device for the production of concrete blocks
GB544969A (en) Improved porous metal articles and methods of making the same
GB1463031A (en) Abrading device
GB808288A (en) Improvements in or relating to the application of granular material, for example sand, to the surfaces of bricks, building blocks and the like
DE377645C (en) Device for the production of refractory and insulating bodies by pressing a mixture of powdery materials in a vacuum
GB941376A (en) A method of manufacturing blocks of light-weight concrete
GB812850A (en) Cut-off wheel
JPS5265703A (en) Method of sintering under pressure of stack formed body
GB701690A (en) Improvements in or relating to the production of metallic elements
CA987182A (en) Method for manufacturing the edge and lower plate of a ski and other articles from wood
JPS5477390A (en) Resinoid grindstone ingredients
US1755158A (en) Edwin becker
GB275890A (en) Process of manufacturing grinding and polishing disks
DE821087C (en) Process for the production of selenium rectifiers and selenium photo elements