US1412392A - Mold - Google Patents

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Publication number
US1412392A
US1412392A US44318821A US1412392A US 1412392 A US1412392 A US 1412392A US 44318821 A US44318821 A US 44318821A US 1412392 A US1412392 A US 1412392A
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US
United States
Prior art keywords
mold
molds
absorptive
concrete
coating
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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
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Inventor
John J Earley
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Individual
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Individual
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Priority to US44318821 priority Critical patent/US1412392A/en
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Publication of US1412392A publication Critical patent/US1412392A/en
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    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31844—Of natural gum, rosin, natural oil or lac
    • Y10T428/31848—Next to cellulosic

Definitions

  • My present invention relates to molds, and more specifically to those of the type commonly known as non-absorptive. These molds or forms are of the class used for the shaping of articles from concrete or the like.
  • Molds or forms for concrete may be generally classed as absorptive or non-absorptive with respect to their ability to draw water from the plastic concrete placed within them.
  • absorptive molds draw water from the mass of concrete, they draw with it the finest of the solid particles contained in the mass and deposit them on the surface of the mold. This process displaces the larger particles from the surface of the mold to just that degree in which the finer particles are attracted. Inversely, a non-absorptive mold does not disturb the normal consistency of the concrete nor the arrangement of the solid particles contained in it. In the manufacture of concrete products from concrete such as that under consideration, it is very desirable that no change should be made in the plastic mass by any action of the mold.
  • Molds for concrete work are made from various materials which, when it is so desired, are rendered non-absorptive'to water by various methods which may be briefly reviewed as follows:
  • Molds made of sand are generally made non-absorptive by saturation with water.
  • Molds made of wood are generally made non-absorptive by a coating of oil or paint or by the application of a sheet metal covering.
  • Molds made of gypsum or similar plastic material have a high degree of absorption and are generally rendered non-absorptive by saturation with water or oil, or by the application of a viscous coating, such as paint, shellac or the like.
  • a coating of this type is not generally satisfactory when multiple copies are to be made in the same mold, because the mold itself does not attain great strength and the viscous coating is not sufiiciently strong to protect it from damages from attrition, due to the impact of the concrete while being filled into it.
  • a membrane which is both waterproof and protective.
  • a membrane is found among the metal foils, waterproofed fabric such as paper, cloth or the like.
  • My invention consists in the novel construction, arrangement and combination of parts hereinafter described and illustrated in the accompanying drawing, in which the figure is a perspective View of a sectionof mold lined according to my invention.
  • the mold of plastic material is shown at 1, provided with a waterproof protective coating 2 of metal foil, waterproofed paper, cloth or the like.
  • This coating is attached to. the mold by means of a highly viscous binder, such as shellac or the like.
  • a binder of this type puckering of the lining is eliminated and worn portions thereof may be readily removed and a new surface applied without defacing the mold proper.
  • a portion of the lining is shown turned back from the mold, which clearly illustrates this replacement feature.
  • a porous mold provided with a water proof protective interior coating attached to said mold by means of shellac.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Description

1.1. EARLY.
MOLD.
APPLICATION FILED FEB. 7, I921.
1,412,392. Patented Apr. 11, 1922.
Inventor.
Jbhn J Earlqy,
W (M by 3W0.
umren STATES PATENT OFFICE.
MOLD.
Specification of Letters Patent.
Patented Apr. 11, 1922.
Application filed February 7, 1921. Serial No. 443,188.
To all whom. it may concern Be it known that I, JOHN J. EARLEY, a citizen of the United States, and resident of Washington, District of Columbia, have invented certain new and useful Improvements in Molds, of which the following is a specification.
My present invention relates to molds, and more specifically to those of the type commonly known as non-absorptive. These molds or forms are of the class used for the shaping of articles from concrete or the like.
Molds or forms for concrete may be generally classed as absorptive or non-absorptive with respect to their ability to draw water from the plastic concrete placed within them.
When absorptive molds draw water from the mass of concrete, they draw with it the finest of the solid particles contained in the mass and deposit them on the surface of the mold. This process displaces the larger particles from the surface of the mold to just that degree in which the finer particles are attracted. Inversely, a non-absorptive mold does not disturb the normal consistency of the concrete nor the arrangement of the solid particles contained in it. In the manufacture of concrete products from concrete such as that under consideration, it is very desirable that no change should be made in the plastic mass by any action of the mold.
Molds for concrete work are made from various materials which, when it is so desired, are rendered non-absorptive'to water by various methods which may be briefly reviewed as follows:
1. Molds made of sand are generally made non-absorptive by saturation with water.
2. Molds made of wood are generally made non-absorptive by a coating of oil or paint or by the application of a sheet metal covering.
3. Molds made of metal are considered non-absorptive.
4. Molds made of gypsum or similar plastic material have a high degree of absorption and are generally rendered non-absorptive by saturation with water or oil, or by the application of a viscous coating, such as paint, shellac or the like. On such molds, a coating of this type is not generally satisfactory when multiple copies are to be made in the same mold, because the mold itself does not attain great strength and the viscous coating is not sufiiciently strong to protect it from damages from attrition, due to the impact of the concrete while being filled into it.
However, for concrete products of complicated form, molds made with gypsum or similar materials are for reasons of economy and facility very desirable, therefore a method for rendering them non-absorptive and for protecting them from damage is valuable.
I have developed such a method by applying to the surface of the mold made of gypsum or similar materials, a membrane which is both waterproof and protective. Such a membrane is found among the metal foils, waterproofed fabric such as paper, cloth or the like.
My invention consists in the novel construction, arrangement and combination of parts hereinafter described and illustrated in the accompanying drawing, in which the figure is a perspective View of a sectionof mold lined according to my invention. Referring now to the drawing, the mold of plastic material is shown at 1, provided with a waterproof protective coating 2 of metal foil, waterproofed paper, cloth or the like. This coating is attached to. the mold by means of a highly viscous binder, such as shellac or the like. By utilizing a binder of this type, puckering of the lining is eliminated and worn portions thereof may be readily removed and a new surface applied without defacing the mold proper. A portion of the lining is shown turned back from the mold, which clearly illustrates this replacement feature.
What I claim is:
l. A mold made of gypsum or the like provided with a waterproofprotective interior coating in sheet form.
2. A mold made of plastic material having an interior coating of metallic foil.
3. A mold made of plastic material having a waterproof protective interior coating in sheet form attached thereto by means of a viscous binder.
4. A porous mold provided with a water proof protective interior coating attached to said mold by means of shellac.
In testimony whereof, I aflix my signature.
JOHN J. EAR-LE1.
US44318821 1921-02-07 1921-02-07 Mold Expired - Lifetime US1412392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US44318821 US1412392A (en) 1921-02-07 1921-02-07 Mold

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US44318821 US1412392A (en) 1921-02-07 1921-02-07 Mold

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531576A (en) * 1948-03-25 1950-11-28 Buttress & Mcclellan Inc Method of casting concrete building elements
US2689381A (en) * 1953-03-20 1954-09-21 Oscar J Terriere Method of making tile
US2746090A (en) * 1952-09-17 1956-05-22 Armco Steel Corp Method of paving pipe
US3069744A (en) * 1959-06-05 1962-12-25 Roy W Emery Moulding method
US3184528A (en) * 1963-01-09 1965-05-18 Corning Glass Works Molding tubular bodies
US4050865A (en) * 1974-09-30 1977-09-27 Frede Hilmar Drostholm Brick press and associated equipment for making bricks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531576A (en) * 1948-03-25 1950-11-28 Buttress & Mcclellan Inc Method of casting concrete building elements
US2746090A (en) * 1952-09-17 1956-05-22 Armco Steel Corp Method of paving pipe
US2689381A (en) * 1953-03-20 1954-09-21 Oscar J Terriere Method of making tile
US3069744A (en) * 1959-06-05 1962-12-25 Roy W Emery Moulding method
US3184528A (en) * 1963-01-09 1965-05-18 Corning Glass Works Molding tubular bodies
US4050865A (en) * 1974-09-30 1977-09-27 Frede Hilmar Drostholm Brick press and associated equipment for making bricks

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