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IPC 7
  B28 - B28B 11/24  
B28B01300-B28B02322
 

SECTION B – PERFORMING OPERATIONS; TRANSPORTING


B 28WORKING CEMENT, CLAY, OR STONE


B 28 BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B; shaping in situ, see the relevant classes of section E)


13/

00Feeding 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/

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

13/

04.Discharging the shaped articles (conveying systems for ceramic mouldings B65G 49/08)

13/

06..Removing the shaped articles from moulds (by means incorporated in, or carried by, the moulds B28B 7/10)


15/

00General arrangement or layout of plant


17/

00Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping (moulds B28B 7/00; after-treatment B28B 11/00; feeding or discharging B28B 13/00; arrangements for embedding elements in the material B28B 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/

02.Conditioning the material prior to shaping

17/

04.Exhausting or laying dust


19/

00Machines or methods for applying the material to surfaces to form a permanent layer thereon (making shaped articles on mandrels B28B 1/30; applying liquids or other fluent materials to surfaces in general B05C; glazing or engobing C04B; 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/

00Methods or machines specially adapted for the production of tubular articles

21/

02.by casting into moulds

21/

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

21/

06..into moulds having sliding parts (B28B 21/26 takes precedence; forms, shutterings, or falsework for making rooms as a whole, whole stories, or whole buildings in situ E04G 11/02)

21/

08..by slip-casting; Moulds therefor

21/

10..using compacting means

21/

12...tamping or ramming the material or the mould elements

21/

14...vibrating, e.g. the surface of the material

21/

16....one or more mould elements

21/

18...using expansible or retractable mould or core elements

21/

20....using inflatable cores, e.g. having a frame inside the inflatable part of the core (connection of valves to inflatable elastic bodies B60C 29/00)  [2]

21/

22...using rotatable mould or core parts

21/

24....using compacting heads, rollers, or the like

21/

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

21/

28.....combined with vibration means

21/

30....Centrifugal moulding

21/

32.....Feeding the material into the moulds

21/

34.....combined with vibrating or other additional compacting means

21/

36...applying fluid pressure or vacuum to the material (combined with slip-casting B28B 21/08)

21/

38....introducing the material wholly or partly under pressure

21/

40....by evacuating one or more of the mould parts

21/

42.by shaping on or against mandrels or like moulding surfaces

21/

44..by projecting, e.g. spraying

21/

46..by dipping

21/

48..by wrapping, e.g. winding

21/

50..Details of compression or compacting means

21/

52.by extruding

21/

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

21/

56.incorporating reinforcements

21/

58..Steel tubes

21/

60..prestressed reinforcements

21/

62...circumferential

21/

64....Winding arrangements

21/

66...Reinforcing mats

21/

68..and applying centrifugal forces

21/

70.by building-up from preformed elements

21/

72..Producing multilayer tubes

21/

74..Producing pipe bends, sockets, sleeves; Moulds therefor (combined with extrusion presses B28B 21/54)

21/

76.Moulds

21/

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

21/

80..adapted to centrifugal or rotational moulding

21/

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

21/

84...Moulds with one or more pivotable parts

21/

86.Cores (in general B28B 7/00)

21/

88..adjustable, collapsible or expansible (using inflatable cores B28B 21/20)

21/

90.Methods or apparatus for discharging after shaping

21/

92.Methods or apparatus for treating or reshaping

21/

94..for impregnating or coating by applying liquids or semi-liquids

21/

96..for smoothing, roughening, corrugating or for removing burr

21/

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


23/

00Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material (B28B 21/00 takes precedence; in units for prefabricated buildings B28B 7/22)

23/

02.wherein the elements are reinforcing members

23/

04..the elements being stressed

23/

06...for the production of elongated articles

23/

08....the articles being of tubular form

23/

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

23/

12...to form prestressed circumferential reinforcements  [2]

23/

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

23/

16....Prestressed reinforcing nets  [2]

23/

18..for the production of elongated articles (B28B 23/06 takes precedence)  [2]

23/

20..the shaping being effected by centrifugal or rotational moulding (B28B 23/10 takes precedence)  [2]

23/

22..assembled from preformed parts  [2]


  B28 - B28B 11/24   
 

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