IPC 6 English version B28B 13/00-B28B 23/22

B28B01300-B28B02322

SECTION B– PERFORMING OPERATIONS; TRANSPORTING

B 28

WORKING CEMENT, CLAY, OR STONE

B 28 B

SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B 22 C; working stone or stone-like material B 28 D; shaping of substances in a plastic state, in general B 29 C; making layered products not composed wholly of these substances B 32 B; shaping in situ, see the relevant classes of section E)

13/

Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus (feeding or discharging devices incorporated in, or operatively associated with, a particular type of shaping apparatus, or specially designed to supply materials to a particular type of shaping apparatus, see the relevant groups for the apparatus)

13/

Feeding the unshaped material to moulds or apparatus for producing shaped articles

13/

Discharging the shaped articles (conveying systems for ceramic mouldings B 65 G 49/08)

13/

Removing the shaped articles from moulds (by means incorporated in, or carried by, the moulds B 28 B 7/10)

15/

General arrangement or layout of plant

17/

Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping (moulds B 28 B 7/00; after-treatment B 28 B 11/00; feeding or discharging B 28 B 13/00; arrangements for embedding elements in the material B 28 B 23/00; details, accessories, or auxiliary measures special to any one type of shaping, machine or method of shaping, see the relevant groups for such machines or methods)

17/

Conditioning the material prior to shaping

17/

Exhausting or laying dust

19/

Machines or methods for applying the material to surfaces to form a permanent layer thereon (making shaped articles on mandrels B 28 B 1/30; applying liquids or other fluent materials to surfaces in general B 05 C; glazing or engobing C 04 B; applying the material to walls or other fixed structures, see the relevant classes of section E)

Methods, apparatus, or machines, specially adapted for the production of tubular or reinforced articles

21/

Methods or machines specially adapted for the production of tubular articles

21/

by casting into moulds

21/

by simple casting, the material being neither positively compacted nor forcibly fed

21/

into moulds having sliding parts (B 28 B 21/26 takes precedence; forms, shutterings, or falsework for making rooms as a whole, whole stories, or whole buildings in situ E 04 G 11/02)

21/

by slip-casting; Moulds therefor

21/

using compacting means

21/

tamping or ramming the material or the mould elements

21/

vibrating, e.g. the surface of the material

21/

one or more mould elements

21/

using expansible or retractable mould or core elements

21/

using inflatable cores, e.g. having a frame inside the inflatable part of the core (connection of valves to inflatable elastic bodies B 60 C 29/00) [2]

21/

using rotatable mould or core parts

21/

using compacting heads, rollers, or the like

21/

with a packer head serving as a sliding mould or provided with guiding means for feeding the material

21/

combined with vibration means

21/

Centrifugal moulding

21/

Feeding the material into the moulds

21/

combined with vibrating or other additional compacting means

21/

applying fluid pressure or vacuum to the material (combined with slip-casting B 28 B 21/08)

21/

introducing the material wholly or partly under pressure

21/

by evacuating one or more of the mould parts

21/

by shaping on or against mandrels or like moulding surfaces

21/

by projecting, e.g. spraying

21/

by dipping

21/

by wrapping, e.g. winding

21/

Details of compression or compacting means

21/

by extruding

21/

Mouthpieces for shaping sockets, bends, or like peculiarly-shaped tubular articles

21/

incorporating reinforcements

21/

Steel tubes

21/

prestressed reinforcements

21/

circumferential

21/

Winding arrangements

21/

Reinforcing mats

21/

and applying centrifugal forces

21/

by building-up from preformed elements

21/

Producing multilayer tubes

21/

Producing pipe bends, sockets, sleeves; Moulds therefor (combined with extrusion presses B 28 B 21/54)

21/

Moulds

21/

with heating or cooling means, e.g. steam jackets

21/

adapted to centrifugal or rotational moulding

21/

built-up from several parts; Multiple moulds; Moulds with adjustable parts

21/

Moulds with one or more pivotable parts

21/

Cores (in general B 28 B 7/00)

21/

adjustable, collapsible or expansible (using inflatable cores B 28 B 21/20)

21/

Methods or apparatus for discharging after shaping

21/

Methods or apparatus for treating or reshaping

21/

for impregnating or coating by applying liquids or semi-liquids

21/

for smoothing, roughening, corrugating or for removing burr

21/

for reshaping, e.g. by means of reshape moulds

23/

Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material (B 28 B 21/00 takes precedence; in units for prefabricated buildings B 28 B 7/22)

23/

wherein the elements are reinforcing members

23/

the elements being stressed

23/

for the production of elongated articles

23/

the articles being of tubular form

23/

the shaping being effected by centrifugal or rotational moulding [2]

23/

to form prestressed circumferential reinforcements [2]

23/

by wrapping, e.g. winding, apparatus [2]

23/

Prestressed reinforcing nets [2]

23/

for the production of elongated articles (B 28 B 23/06 takes precedence) [2]

23/

the shaping being effected by centrifugal or rotational moulding (B 28 B 23/10 takes precedence) [2]

23/

assembled from preformed parts [2]

B28 - B28B 11/24