CPC Definition - Subclass B22C
This place covers:
Methods, machines and materials for manufacturing moulds or cores used in a foundry; the necessary patterns, accessory devices or tools.
Attention is drawn to the following places, which may be of interest for search:
Shaping clay or other ceramic substances |
In this place, 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 |
This place covers:
the compositions of the materials used, the grain structures thereof and chemical or physical features to obtain the mould or core products
Attention is drawn to the following places, which may be of interest for search:
use of lost patterns | |
investing a lost pattern | |
Refractory materials in general | |
macromolecular compounds |
This place covers:
Any kind of composition for coating moulds , cores or patterns
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 |
This place covers:
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;
This place covers:
These groups cover:
Patterns, pattern plates and the assembling thereof; Core boxes and accessories., e.g. sealing means, venting means, ejector elements
This place does not cover:
Moulding of an expanded plastic material | |
Moulding wax |
Attention is drawn to the following places, which may be of interest for search:
Venting means for moulds | |
Vented cores | |
Venting means for injection dies | |
Ejecting castings from injection casting dies | |
Cores (for plastic moulding) with venting means | |
Moulds (for plastics) with venting means | |
Joining of plastics |
This place covers:
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
This place does not cover:
Venting means for core boxes | |
Moulds for ingots | |
Venting means for injection dies | |
Dies for injection die casting | |
Selection of die materials | |
Cooling or heating injection dies | |
Locating and holding cores or inserts in die casting | |
Locking, opening or closing dies |
Attention is drawn to the following places, which may be of interest for search:
Casting chains |
B22C 9/04 : machines for investing a lost pattern are classified in B22C 13/085
This place covers:
moulding machines wherein the moulds are moved through different stations for successive operations; - moulding machines which produce flaskless moulds; - travelling moulding machines
Attention is drawn to the following places, which may be of interest for search:
Transporting flaskless moulds |
This place covers:
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
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)
This place covers:
moulding machines characterised by the mechanism used for compacting the moulding material inside the flask; accessories therefor;
This place covers:
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
This place covers:
Any type of details for moulding machines, e.g. tables, controlling devices,
loosening devices for the pattern, seals, lining plates.
This place covers:
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
This place does not cover:
Stripping plates |
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 |
This place covers:
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.
Attention is drawn to the following places, which may be of interest for search:
Selection of compositions for coating moulds | |
Lubricating injection die casting moulds |
This place 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
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