View Unit : Closing and Securing Sand Moulds for Casting

Unit

Unit Reference Number

L/502/9200

Qualification Framework

QCF

Title

Closing and Securing Sand Moulds for Casting

Unit Level

Level 3

Unit Sub Level

None

Guided Learning Hours

Unit Credit Value

Date of Withdrawal

SSAs

4.1 Engineering

Unit Grading Structure

Pass

Assessment Guidance

This unit must be assessed in a work environment and must be assessed in accordance with the ‘Common Requirements for National Vocational Qualifications (NVQ) in the QCF’ which can be downloaded from Semta’s website: http://www.semta.org.uk/training_providers__awarding/national_occupational_standard/qca_assessment_requirements.aspx

Additional assessment requirements have been published by Semta. These additional assessment requirements are set down in Semta’s Engineering assessment strategy which can be downloaded from Semta’s website: http://www.semta.org.uk/training_providers__awarding/national_occupational_standard/qca_assessment_requirements.aspx

View Unit's Qualifications

Learning Outcomes and Assessment Criteria

Learning Outcome - The learner will:		Assessment Criterion - The learner can:
1	Close and Secure Sand Moulds for Casting	1.1	Work safely at all times, complying with health and safety and other relevant regulations and guidelines
		1.2	Carry out all of the following during the closing and securing activities: check and confirm that the moulds received are complete and free from defects check that the work area is clear of obstructions and hazards use appropriate personal protective equipment comply with job instructions, mould closing and securing specifications, relevant COSHH sheets and risk assessment documentation use the correct tools and equipment for the mould closing and securing activities follow the defined closing and securing procedures and apply safe working practices and procedures at all times ensure the closed and secured mould meets the required specification for quality and accuracy leave the work area in a safe condition on completion of the mould closing and securing activities
		1.3	Follow the relevant instructions, assembly drawings and any other specifications
		1.4	Ensure that the specified components are available and that they are in a usable condition
		1.5	Use the appropriate methods and techniques to assemble the components in their correct positions
		1.6	Close and secure one of the following types of mould: boxed boxless core assembly
		1.7	Close and secure moulds produced from one of the following types of sand: greensand chemically bonded gas activated dry silica (vacuum sealed) chemically bonded resin catalyst ester-silicate bonded
		1.8	Remove any impurities from the mould cavity, and seal the mould joint using one of the following methods: adhesive flexible mastic sand (cut joint) plumbago and oil
		1.9	Locate the moulds using one of the following methods: pins rebates diabolos cores
		1.10	Trial close the mould to ensure casting quality can be maintained, and check/rectify five of the following: joint crushes cores not touching core crushes core vent protection is complete mould sealing is complete core securing devices (studs/chaplets) are correct and in place mould location devices/methods are correct and intact mould protection materials are removed
		1.11	Secure the components using the specified connectors and securing devices
		1.12	Check the completed assembly to ensure that all operations have been completed and the finished assembly meets the required specification
		1.13	Complete the closing of the moulds, to include all of the following: locate the moulds using pins, rebates, diabolos or cores, as appropriate close moulds manually, mechanically or by combined means secure the moulds using clamps/clips, weights or nuts and bolts
		1.14	Deal promptly and effectively with problems within their control and report those that cannot be solved
2	Know how to Close and Secure Sand Moulds for Casting	2.1	Explain the hazards and specific safety precautions to be taken when closing and securing sand moulds for casting manually and mechanically
		2.2	Describe the hazards associated with the use of mechanical equipment in the handling of sand moulds
		2.3	Describe the COSHH regulations when dealing with resin bonded sands, solvents, adhesives, and mould and core dressings
		2.4	Describe where to obtain information on COSHH regulations
		2.5	Explain the Provision and Use of Work Equipment Regulations (PUWER)
		2.6	Describe the manual lifting techniques, and EU requirements on acceptable weights to be handled
		2.7	Describe what personal protective equipment (PPE) should be used, and how to obtain it
		2.8	Explain how to obtain the necessary job instructions and interpret the information
		2.9	Explain why it is necessary to check the moulds prior to commencing mould closing operations
		2.10	Describe the defects that can occur in the moulds and cores (such as dirty moulds, cracked surfaces, exposed reinforcements, friable surfaces, broken or weak mould and core sections, incomplete mould or cores, distorted cores, mismatch, damaged or broken core prints and core locations, core lifting eyes exposed, mould location devices missing or distorted, uncoated moulds or cores)
		2.11	Describe the actions that are needed when moulds or cores are found to be sub-standard
		2.12	Describe the different types of sands that are used to produce the moulds and cores
		2.13	Explain the reasons why mould parts need to be secured together before casting
		2.14	Describe the differences between box, boxless and core assembled moulds, and how these differences affect the preparation process
		2.15	Explain how to calculate the ferrostatic pressure in the moulds
		2.16	Describe the effects on casting quality and accuracy of incorrectly closed and secured moulds
		2.17	Explain the reason why joint sealing is undertaken
		2.18	Explain why different types of mould locating device are used with different types of mould
		2.19	Explain why different types of mould securing device are used
		2.20	Explain why different methods are used to secure moulds produced from different sands
		2.21	Explain why some moulds are placed on special equipment for casting (such as tilting tables)
		2.22	Explain why it is important to keep the equipment clean and free from damage, to practice good housekeeping of tools and equipment, and to maintain a clean working area
		2.23	Describe the extent of their own authority and whom they should report to if they have problems that they cannot solve when closing and securing sand moulds

Equivalent Units

There are no equivalences to display.