WO1987002300A1 - Appareil de moulage - Google Patents

Appareil de moulage Download PDF

Info

Publication number
WO1987002300A1
WO1987002300A1 PCT/NO1986/000072 NO8600072W WO8702300A1 WO 1987002300 A1 WO1987002300 A1 WO 1987002300A1 NO 8600072 W NO8600072 W NO 8600072W WO 8702300 A1 WO8702300 A1 WO 8702300A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
lining
section
link members
mould apparatus
Prior art date
Application number
PCT/NO1986/000072
Other languages
English (en)
Inventor
Erik BRANDTZA^EG MEYER
Original Assignee
Brandtzaeg Meyer Erik
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 Brandtzaeg Meyer Erik filed Critical Brandtzaeg Meyer Erik
Publication of WO1987002300A1 publication Critical patent/WO1987002300A1/fr

Links

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
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0038—Machines or methods for applying the material to surfaces to form a permanent layer thereon lining the outer wall of hollow objects, e.g. pipes
    • 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
    • B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
    • 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
    • B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
    • B28B7/04—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article one or more of the parts being pivotally mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding

Definitions

  • the invention relates to a mould apparatus for moulding objects having a substantially uniform cross section, comprising a plurality of elongate, interconnectable link members provided with lining parts adapted to form a mould surface when the link members are interconnected.
  • the invention is particularly intended for moulding a weight cap or coating around sub-surface pipes for the transport of oil or gas at sea.
  • An example of a field in which the invention is particularly useful is the moulding of a weight coating made from a composite material consisting of crushed iron ore in a plastics matrix as described in the applicant's Norwegian patent No. 150 771 (corresponding to US patent No. 4 606 378) .
  • an outer plas pipe is utilized as a moulding for the composite material to form the weight coating. This is a rather expensive approach since in many cases the outer plastic mould pipe has proved unnecessary in the completed moulded structure.
  • GB patent application No. 2 052 362 discloses a mould for moulding of weight coatings on pipes, for example, consisting of elongate members of a circular segment-shaped section internally coated with replaceable lining parts such as wooden bars and adapted to be interconnected around the pipe to be coated.
  • the prior mould according to the GB patent application can be adapted to pipes of different diametres only by removing all the installe lining bars, form new lining bars of a different thickness in accordance with the new pipe diameter, and installing the new lining bars in the mould.
  • the possibility of varying the mould diameter of one and the same mould is rather limited, and the mould can only be utilized for external moulding of pipes.
  • the lining bars of the prior mould must be very accurately machined and installed in the mould in order to obtain a fairly tight continuous moulding surface.
  • the object of the present invention is to provide a mould apparatus of the introductorily described type, which in a simple and rapid manner can be conformed to the circumference of objects, such as pipes, of very different sections, and which may be utilized for objects of concave as well as convex shape.
  • each link member of the mould apparatus having a protruding, substan ⁇ tially circular section head portion adapted to be laterally inserted- into a correspondingly circularly sectioned recess in the adjacent link member.
  • the radius of curvature of the mould apparatus may be varied through a very wide range, simply by inserting or removing link members in a number adapted to the purpose, without the necessity of replacing lining parts or other components.
  • the structure according to the invention will secure that the edge portions of the lining parts are resiliently abutting each other to form a tight, continuous mould surface.
  • the latter property is utilized in a particularly advantageous manner if at least an external portion of the lining parts consists of an elastomeric material, and particularly if it has a trapezoidal cross section.
  • Fig. 1 shows a cross section of a link member in the mould apparatus according to the invention
  • Fig. 2A and B show interconnected link members in two different conditions
  • Fig. 3A and B show cylindrical mould cavities formed by means of the mould apparatus
  • Fig. 4 shows a modified link member
  • Fig. 5 is a partial view of a mould formed by the modified link member shown in fig. 4,
  • Fig. 6 and 7 show further modified members for the forming of corner mould surfaces
  • Fig. 8 shows an end piece to be used in connection with the mould apparatus according to invention
  • Fig. 9 shows a connector to interconnect mould apparatuses according to the invention.
  • the mould apparatus according to the invention is releasably assembled from a number of elongate, profiled link members to form a flexible mould wall or mat.
  • the basic shape of a such link member 2 is shown in cross section in fig. 1. It comprises a body 4 and a lining part 6 releasably secured to the body 4.
  • the body 4 has a central portion 8 being connected at one side via a neck portion 10 to a circular section head portion 12 and at its opposite side being provided with a circular groove 14 dimensioned to slidingly receiving the head portion 12 of an adjacent link member 2 and having an opening 15 providing clearence for the neck portion 10.
  • the central portion 3 has a flat backing surface 16 parallel to a plane P through the centres of the circular head portion 12 and matching circular groove 14. The backing surface 16 forms a support surface for the lining part 6.
  • the lining part 6 consists of a similarly elongate, strip of an elastomeric material, such as rubber, with a trapezoidal cross section, for example.
  • the lining part 6 engages the backing surface-16 with its shorter longitudinal face which has a longitudinal slit opening 18.
  • the lining part 6 is releasably locked no the body 4 by means of regularly spaced throughbolts 20 engaged in threaded apertures in an elongate metal plate 22 which is embedded or by other means secured in the elastomeric material of the lining part.
  • the larger width dimension of the lining part is indicated by B.
  • the "pitch" of the link members is determined by the spacing C between the centres of the circular link head portion 12 and the circular link groove 14.
  • the link members 2 are interconnected by laterally pushing the head portion 12 of the link body into the groove 14 of the adjacent member.
  • each link member may perform a limited pivot movement around the head portion of the adjacent member, an arcuate circumferencial portion 19 at the recess 14 in a link being displaced in a correspondingly arcuate recess 21 in the adjacent member during the pivoting movement.
  • the pivoting movement is limited by the groove opening 15.
  • fig. 2A is shown six interconnected links 2 in which the links are fully rotated (angularly displaced) relative to each others in one direction, i.e. until the circu ferencial portion 19 of one link bottoms in the recess 21 of the adjacent member against the neck portion 10.
  • the facing edges of the elastomeric lining parts ⁇ will then be resiliently compressed and form a continuous, sealed, concave mould surface.
  • 3A and 3B may be obtained by one and the same type of link members , i.e. link members having a given pitch C, by utilizing an appropriate number cf members between the above mentioned minimum and maximum numbers consistent with the desired diameter. If, on the other hand, one wishes to determine the pitch C for link members 2 based on a desired mould diameter D and a selected number of members n the pitch can be calculated by simple geometry
  • the mould apparatus according to the invention in addition to concav ⁇ ly curved mould surfaces as so far shown, may also be us to form flat or convexly curved mould surfaces.
  • What matters is the ratio between the maximum width B of the lining part 6 and the pitch C of the body 4.
  • Fig. 5 is a partial view cf interconnected link members 2' with support plates 24, forming a convexly curved mould surface portion.
  • the link members 2' can be interconnected to form a closed cylinder form, e.g. to form the internal mould or form work in a steel pipe to be provided with an internal weight coating.
  • Fig. 6 and 7 show interconnected link bodies which, together with suitabl formed lining parts (not shown) , are modified to form an "internal" corner moulds-surface and an “external” corner mould surface, respectively, with orner angle equal to or larger than 90° .
  • the lining part 6 it is not essential for the lining part 6 to have a trapezoidal cross section as shown. Instead, It may ha ⁇ * e C- shaped edges, for example, and the outer surface thereof may be corrugated rather than smooth. Generally it will be understood that by modifying the form and dimensions of the lining members 6 one and the same basic type of body 4 may be used, to obtain a mould cavity of almost any desired cross sectional shape.
  • a pip- R is to be coated with a weight coating W.
  • a schematically indicated mould apparatus F according to the invention consisting of link members 2 interconnected into a cylinder form in the same manner as shown in fig. 3A and B.
  • An annular end collar E sealingly receives the end portion of the mould apparatu F while also sealingly engaging the surface of the pipe R, e.g. by means of an O-ring seal.
  • the end collar E may be provided with an.opening (not shown) for injecting moulding mass while an end collar in the opposite end of the mould apparatus may be formed with opening for evacuation of the mould cavity defined by the interconnected link members, the lining parts thereof pressing against each other to form an air tight seal around the pipe.
  • the end collars E will be suitably split into two halves when they are used in connection with moulding of an external coating around pipes, the two halves being assembled around the pipe by means of bolts for example.
  • mould apparatuses F of the invention may be axially interconnected, for example by means of suitably formed joint collars S of substantially T-shaped cross section as schematically indicated in fig. 9.
  • the object When the moulding of the required object, e.g. a cylinder as indicated in fig. 3, is completed in the mould apparatus of the invention the object easily detaches from the mould apparatus upon removing a l ' ink member thereof by pushing it laterally outwards, the pinching effect between the compressed lining parts of the link memb-ers assisting in releasing the mould apparatus, and the rubber material from which the lining parts preferably are made having low adhesion to most of the moulding materials in question, e.g. to the composite material discussed in the Norwegian patent No. 150 771 referred to above. Suction between the mould surface of the lining parts and the surface of the moulded object is eliminated when the mould members are rolled off since air will leak in between the connections when the pinching effect seases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Un appareil de moulage (F) comporte des organes de liaison (2) reliés les uns aux autres de manière libérable et constitués d'un corps (4) et d'une partie de garnissage (6). Lorsque les organes de liaison (2) sont reliés les uns aux autres, les parties de garnissage (6) s'engagent de manière résiliente les unes dans les autres afin de former une surface de moule continue et étanche.
PCT/NO1986/000072 1985-10-10 1986-10-09 Appareil de moulage WO1987002300A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO854032 1985-10-10
NO854032 1985-10-10

Publications (1)

Publication Number Publication Date
WO1987002300A1 true WO1987002300A1 (fr) 1987-04-23

Family

ID=19888525

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1986/000072 WO1987002300A1 (fr) 1985-10-10 1986-10-09 Appareil de moulage

Country Status (3)

Country Link
EP (1) EP0243395A1 (fr)
AU (1) AU6478786A (fr)
WO (1) WO1987002300A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378618A1 (fr) * 1988-05-31 1990-07-25 CARR, Richard Alexander Systeme de moulage modulaire
GB2240302A (en) * 1989-12-29 1991-07-31 Kenneth Macmillan Moulding articles of different length or diameter in a single mould

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1398968A (en) * 1920-04-03 1921-12-06 George W Jackson & Fitzpatrick Supporting-form for concrete and masonry structures
SE315092B (fr) * 1965-04-22 1969-09-22 A Bock
FR1601800A (fr) * 1967-12-29 1970-09-14
GB2052362A (en) * 1979-06-06 1981-01-28 Arbed Apparatus for coating the outside surfaces of hollow bodies

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1398968A (en) * 1920-04-03 1921-12-06 George W Jackson & Fitzpatrick Supporting-form for concrete and masonry structures
SE315092B (fr) * 1965-04-22 1969-09-22 A Bock
FR1601800A (fr) * 1967-12-29 1970-09-14
GB2052362A (en) * 1979-06-06 1981-01-28 Arbed Apparatus for coating the outside surfaces of hollow bodies

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378618A1 (fr) * 1988-05-31 1990-07-25 CARR, Richard Alexander Systeme de moulage modulaire
EP0378618A4 (en) * 1988-05-31 1991-12-04 Richard Alexander Carr Modular moulding system
GB2240302A (en) * 1989-12-29 1991-07-31 Kenneth Macmillan Moulding articles of different length or diameter in a single mould
GB2240302B (en) * 1989-12-29 1993-09-15 Kenneth Macmillan Apparatus for and method of molding articles

Also Published As

Publication number Publication date
AU6478786A (en) 1987-05-05
EP0243395A1 (fr) 1987-11-04

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