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FOUNDRY MOULDING (moulding refractory materials in general B28B)
Definition statement
This subclass/group covers:

Methods, machines and materials for manufacturing moulds or cores used in a foundry; the necessary patterns, accessory devices or tools.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Shaping clay or other ceramic substances
Special rules of classification within this subclass

The following IPC groups are not used in the internal ECLA classification scheme.

Subject matter covered by these groups is classified in the following ECLA groups :

B22C3/02 covered by B22C 3/00

B22C5/13 covered by B22C 5/12

B22C7/05 covered by B22C 7/04

B22C9/11 covered by B22C 9/10

B22C9/14 covered by B22C 9/12

B22C9/16 covered by B22C 9/12

B22C15/264 to B22C15/276 covered by B22C 15/23

B22C19/01 covered by B22C 19/00

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Vacuum sealed moulding
a moulding process wherein a heated pattern is covered with a plastic sheet; a box of loose moulding sand is placed over the pattern and a vacuum is applied to the sand which then conforms to the shape of the sheet; after casting, the vacuum is released and the loose sand falls away from the casting product
Chaplet
metal support that holds a core in place within a mould; molten metal solidifies around the chaplet and fuses it into the finished casting
Stack moulds
a composite mold made up of stacked sections, each of which produces a complete gate of castings, and poured from a central downgate.
Breaker core
a core placed in a casting mould between the feeder and the casting cavity; the core provides for a reduced feeder-to-casting contact and enables feeders easily to be broken off from the cast products
Investing a lost pattern
method of moulding using a pattern of wax, plastic, or other material which is coated by a moulding material in slurry or liquid form to be dried and hardened afterwards
Lost pattern
a pattern (or model) which is destroyed after forming the mould; this can be done by melting out (in the case of a wax pattern) or by burning during casting (in the case of a foam pattern)
Core box
a box or mould, usually divisible and metallic, in which cores are moulded
Feeder head
a reservoir of molten metal connected to a casting to provide additionnal metal to the casting, required as the result of shrinkage before and during solidification
Pattern plate
a plate foreseen with a pattern to realise at least one mould part (cope or drag); the plate can have only on one side a half pattern, able to realise cope or drag (single sided pattern) or the plate is foreseen on both sides with a half pattern, able to realise both cope and drag (double sided pattern plate or matchplate)
Stripping plate
a plate which prevents moulding material from dislodging, when removing the pattern from the mould
Sprue
the mould channel that connects the pouring basin with the runner or, in the absence of a pouring basin , directly into which molten metal is poured
Permanent moulds
moulds which are used more than once
Semi -permanent moulds
moulds of which a part is used more than once, while the other part has to be renewed after each casting cycle
Flask
a metal frame used for making and holding a refractory mould
Compositions of refractory mould or core materials; Grain structures thereof (refractory materials in general C04B 35/00); Chemical or physical features in the formation or manufacture of moulds
Definition statement
This subclass/group covers:

These groups cover:

the compositions of the materials used, the grain structures thereof and chemical or physical features to obtain the mould or core products

Informative references
Attention is drawn to the following places, which may be of interest for search:
Refractory materials in general
macromolecular compounds
use of lost patterns
investing a lost pattern
Special rules of classification within this group

B22C 1/02 - B22C 1/14 and subgroups cover the use of additives for special purposes; if this additives are specific binding agents, then in addition a class in the range B22C 1/16 - B22C 1/26 is also given

Selection of compositions for coating the surfaces of moulds, cores, or patterns
Definition statement
This subclass/group covers:

Any kind of composition for coating moulds , cores or patterns

Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for coating moulds or cores
Linings for centrifugal moulds
Lubricating injection die casting moulds
Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose (of general applicability, see the relevant places, e.g. for material with water-setting properties B28C)
Definition statement
This subclass/group covers:

These groups cover:

The preparation of moulding material; Reclaiming used moulding material; Machines or devices therefor , e.g. mixers, kneaders, grinders, stirrers, coolers, dryers

Plants showing a combination of these machines;

Informative references
Attention is drawn to the following places, which may be of interest for search:
Producing mixtures containing clay
Mixing in general
Crushing, pulverising
Machine tools
B23
Patterns; Manufacture thereof so far as not provided for in other classes
Definition statement
This subclass/group covers:

These groups cover:

Patterns, pattern plates and the assembling thereof; Core boxes and accessories., e.g. sealing means, venting means, ejector elements

References relevant to classification in this group
This subclass/group does not cover:

These groups do not cover:

Moulding of an expanded plastic material
Moulding wax
Informative references
Attention is drawn to the following places, which may be of interest for search:
Joining of plastics
Venting means for moulds
Vented cores
Venting means for injection dies
Moulds (for plastics) with venting means
Cores (for plastic moulding) with venting means
Ejecting castings from injection casting dies
Moulds or cores (uniquely adapted to particular casting processes B22D); Moulding processes (processes involving the use of particular moulding machines, see the relevant groups for these machines)
Definition statement
This subclass/group covers:

These groups cover:

Moulds or cores; moulding processes, not involving the use of a particular moulding machine;

B22C 9/12 covers treatment of the green sand moulds or cores

B22C 9/18 covers the after treatment of moulds or cores before casting, like making venting channels, or deburring cores

References relevant to classification in this group
This subclass/group does not cover:

These groups does not cover:

Moulds for ingots
Dies for injection die casting
Locking, opening or closing dies
Locating and holding cores or inserts in die casting
Venting means for injection dies
Venting means for core boxes
Selection of die materials
Cooling or heating injection dies
Informative references
Attention is drawn to the following places, which may be of interest for search:
Casting chains
Special rules of classification within this group

B22C 9/04 : machines for investing a lost pattern are classified in B22C 13/085

Moulding machines characterised by the relative arrangement of the parts of same
Definition statement
This subclass/group covers:

These groups cover:

moulding machines wherein the moulds are moved through different stations for successive operations; - moulding machines which produce flaskless moulds; - travelling moulding machines

Informative references
Attention is drawn to the following places, which may be of interest for search:
Transporting flaskless moulds
Moulding machines for making moulds or cores of particular shapes
Definition statement
This subclass/group covers:

These groups cover:

Machines, accessory devices and tools : for machining a mould or core from a block of moulding material; -for extruding moulding material through a die and for making shell moulds or shell cores

Special rules of classification within this group

B22C 13/08 : If a specific compacting mechanism is used, then a class is also given in one of the relevant groups (B22C 15/00 - B22C 15/34)

Moulding machines characterised by the compacting mechanism; Accessories therefor
Definition statement
This subclass/group covers:

These groups cover:

moulding machines characterised by the mechanism used for compacting the moulding material inside the flask; accessories therefor;

Moulding machines characterised by the mechanism for separating the pattern from the mould or for turning over the flask or the pattern plate
Definition statement
This subclass/group covers:

These groups cover:

B22C 17/02 covers moulding machines where the mould is lifted off from the pattern by using a number of moving pins

B22C 17/06 covers moulding machines wherein the pattern is retracted from the mould, through a stripping plate which prevents dislodging moulding material

B22C 17/08 - B22C 17/14 cover moulding machines wherein pattern plate and flask, eventually together with the compacting unit receive a rotating movement during demoulding

Components or accessories for moulding machines
Definition statement
This subclass/group covers:

These groups cover:

Any type of details for moulding machines, e.g. tables, controlling devices,

loosening devices for the pattern, seals, lining plates.

Flasks; Accessories therefor (stripping plates B22C 17/06)
Definition statement
This subclass/group covers:

These groups cover:

Any kind of flasks and details thereof like upset frames, boards, clamping and guiding equipment; Accessories like equipment for securing moulding material or cores inside the flasks

References relevant to classification in this group
This subclass/group does not cover:

These groups do not cover:

Stripping plates
Informative references
Attention is drawn to the following places, which may be of interest for search:
Moulds formed by vacuum sealed moulding
Holding cores or inserts in injection dies
Tools; Devices not mentioned before for moulding
Definition statement
This subclass/group covers:

These groups cover:

Any kind of tool or device not mentioned before for moulding, e.g. devices for coating moulds or cores, tools for marking moulds, tools for measuring mould strength.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Lubricating injection die casting moulds
Selection of compositions for coating moulds
Foundry moulding plants (for preparing mould materials B22C 5/18; in combination with casting plants B22D 47/02)
Definition statement
This subclass/group covers:

the lay-out of a moulding plant which may comprise a combination of machines for preparing the moulding material, core making machines, mould making machines and eventually transporting means between the machines

Special rules of classification within this group

Plants for preparing moulding material are classified in B22C 5/18

Moulding plants in combination with a casting plant are classified in B22D 47/02

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Last Modified: 10/11/2013