Foundry moulder
Also known as: foundry worker, foundry sand moulder, coremaker, foundry core maker, core maker, sand moulder
About this occupation
Foundry moulders manufacture cores for metal moulds, which are used to fill a space in the mould that must remain unfilled during casting. They use wood, plastic or other materials to create the core, selected to withstand the extreme environment of a metal mould.
A specialisation of foundry operative.
Essential skills and knowledge
- maintain core parts
- insert core structures
- construct cores
- maintain cores
- provide pouring holes in cores
- ensure core uniformity
- repair core defects
- position core workpieces
- troubleshoot
- pour molten metal into cores
Typical tasks and preparation
From the related US occupation profile Foundry Mold and Coremakers (O*NET 51-4071.00). Linked by an official crosswalk: related, not identical; details vary by country.
- Clean and smooth molds, cores, and core boxes, and repair surface imperfections.
- Sift and pack sand into mold sections, core boxes, and pattern contours, using hand or pneumatic ramming tools.
- Position patterns inside mold sections, and clamp sections together.
- Position cores into lower sections of molds, and reassemble molds for pouring.
- Sprinkle or spray parting agents onto patterns and mold sections to facilitate removal of patterns from molds.
- Form and assemble slab cores around patterns, and position wire in mold sections to reinforce molds, using hand tools and glue.
- Typical education (US)
- High School Diploma or the equivalent (such as a GED)
- Preparation
- Job Zone 2 of 5
- Interests
- Realistic, Conventional, Investigative
Top skills: Monitoring, Operations Monitoring, Active Listening, Critical Thinking, Time Management, Speaking
US median pay: US$48,110 a year (2025), 12,790 employed. Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics.
Subjects this work relies on
How important each subject's knowledge is in the job itself, rated by people doing it (1 to 5).
- English or Literature in EnglishO*NET: English LanguageImportant (3.4)
- MetalworkO*NET: MechanicalImportant (3.4)
- Business Studies or EntrepreneurshipO*NET: Administration and ManagementImportant (3.2)
- PhysicsO*NET: PhysicsImportant (3.1)
- Technical DrawingO*NET: DesignImportant (3.1)
- Design and TechnologyO*NET: Design + Engineering and TechnologyImportant (3.0)
O*NET data describe work in the United States; requirements differ by country. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET is a trademark of USDOL/ETA. CareerProof Global has modified all or some of this information; USDOL/ETA has not approved, endorsed, or tested these modifications.
Preparation needed
Job Zone 1-2: Very Little to Some Preparation Needed
- Most common education (US)
- High School Diploma or the equivalent (such as a GED)
- Education
- Usually requires a high school diploma or GED, though some occupations may not.
- Experience
- Some occupations may need little or no previous experience; others require several months to a year of experience. For example, landscaping and groundskeeping workers might require very little training or previous experience, while agricultural equipment operators can benefit from on-the job training.
- Training
- Ranges from a few days to one year of on-the-job training.
O*NET data describe work in the United States; requirements differ by country. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET is a trademark of USDOL/ETA. CareerProof Global has modified all or some of this information; USDOL/ETA has not approved, endorsed, or tested these modifications.
Related occupations
Occupations O*NET links to this one by similar work, skills and knowledge.
- Molders, Shapers, and Casters, Except Metal and Plastic
- Molding, Coremaking, and Casting Machine Setters, Operators, and Tenders, Metal and Plastic
- Fiberglass Laminators and Fabricators
- Grinding and Polishing Workers, Hand
- Refractory Materials Repairers, Except Brickmasons
- Extruding, Forming, Pressing, and Compacting Machine Setters, Operators, and Tenders
- Woodworking Machine Setters, Operators, and Tenders, Except Sawing
- Extruding and Forming Machine Setters, Operators, and Tenders, Synthetic and Glass Fibers
- Cutting and Slicing Machine Setters, Operators, and Tenders
- Forging Machine Setters, Operators, and Tenders, Metal and Plastic
O*NET data describe work in the United States; requirements differ by country. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET is a trademark of USDOL/ETA. CareerProof Global has modified all or some of this information; USDOL/ETA has not approved, endorsed, or tested these modifications.