Assessor Resource

PMC553070B
Design and construct moulds for fibrous plaster products

Assessment tool

Version 1.0
Issue Date: March 2024


This unit of competency applies to plaster modellers who are responsible for designing from scratch by intuitive means or determining, either from an existing shape or product, the shape of a product to be created in fibrous plaster. The modeller then, by a process of hand carving, creates a negatively shaped mould impression from which a positively shaped fibrous plaster impression would be created.

This competency is typically performed by an experienced modeler, leading hand or supervisor.

This unit of competency covers the design and construction of moulds for fibrous plaster products. It involves creating an image of the product to be produced, converting the image to an imagined negatively shaped mould cavity, selecting and mounting material for mould construction and ensuring mould meets requirements.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)

Prerequisites

PMC552024C

Hand mould products


Employability Skills

This unit contains employability skills.




Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

The unit will be assessed in as holistic a manner as is practical and may be integrated with the assessment of other relevant units of competency.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Competence must be demonstrated in the ability to recognise situations requiring action and then in implementing appropriate corrective action. Consistent performance should be demonstrated. In particular look to see that:

OHS requirements are met

quality improvement techniques are applied

emergency procedures are understood and applied

waste is minimised.

Context of and specific resources for assessment

Assessment will require access to an operating plant over an extended period of time, or a suitable method of gathering evidence of operating ability over a range of situations.

Assessment will occur over a range of situations which will include disruptions to normal, smooth operation.

Simulation or case studies/scenarios may be required to allow for timely assessment of parts of this unit of competency. Simulation should be based on the actual plant and will include 'walk-throughs' of the relevant competency components. A bank of scenarios/case studies/what ifs and questions will be required to probe the reasoning behind observable actions.

Method of assessment

In all plants it may be appropriate to assess this unit concurrently with relevant teamwork and communication units.

Guidance information for assessment

Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.


Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)


Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

Required skills

Required skills include:

using and maintaining all required materials, tools and parts

recognising situations which could cause production problems and taking appropriate action

implementing enterprise's procedures and relevant regulatory requirements within appropriate time constraints and in a manner relevant to the operation of moulds and dies

diagnosing and solving problems involved in the work

communicating effectively with team members, management and other departments

reading and numeracy to interpret workplace documents and technical information

Required knowledge

Required knowledge includes:

specified quality standards

characteristics of different materials

requirements from drawings, specifications or job sheets

distinguish between causes of faults such as:

materials faults

dimensional inaccuracies

inappropriate allowance for material shrinkage

damage to components

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Procedures

All operations are performed in accordance with standard procedures and work instructions

Moulds

Moulds may be manufactured from:

plaster

timber

rubber

metal

a combination of these

Materials

Materials may include:

additives

body materials

epoxy resins

metal strapping

plaster

release agents

rubber

timber

water

Equipment

Equipment may include:

moulds

chisels and hand held cutting tools

hand and power tools

jigs and fixtures

personal safety equipment

mixing equipment

models

weighing equipment

Typical problems

Typical problems may include:

personal injuries

complexities of mould design and shape

lack of appropriate illumination

Occupational health and safety (OHS)

The identification and control of hazards and the application of OHS are to be in accordance with current, applicable legislation and regulations, and company procedures. All work is carried out at all times in accordance with these requirements

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Establish original product concept or design from drawings, originals or consultation with the customer 
Sketch out product prototype design and establish product sizes making appropriate allowance for material shrinkage 
Identify areas where undercuts, cutbacks or other special features are required 
Determine parting line 
Determine material from which mould is to be made 
Set up material for mould making, ensuring that the mould can be handled or moved without damage 
Establish datum point and mark out design dimensions using geometric and lineal calculations 
Determine correct cavity depths and contours 
Ensure there is adequate ventilation and light to facilitate an appropriate work environment 
Fit appropriate protective equipment to prevent inhalation or irritation of by-products of the mould making process 
Use appropriate tools to carve out mould cavity and detail 
Accurately follow the design detail to produce a mould cavity to specification 
Avoid undercuts which will prevent removal of the plaster product from the mould 
Ensure appropriate degrees of taper are provided to facilitate product removal 
Carve reliefs according to design and remove debris as the work proceeds 
Clean down completed mould and clean up work area 
Inspect mould surface for defects or irregularities 
Compare design details with mould cavity to confirm accuracy of translation 
Coat mould surface to preserve finish and allow to dry 
Apply slipping agent to mould surface 
Prepare and insert anchors or ties 
Prepare plaster mixture and appropriate amount of glass fibre 
Cast plaster mix and fibre into mould cavity, strike off and allow to set 
Remove prototype from mould or mould from prototype 
Check prototype for dimensional and detail accuracy 
Compare prototype and mould to identify any faults or mould inaccuracies 
Adjust or dress mould to remove imperfections and clean mould surface 
Cast second prototype and recheck product and mould 
Clean up mould and mark in accordance with organisation identification practice 
Identify hazards in modelling work area 
Assess the risks arising from those hazards 
Implement measures to control those risks in line with procedures and duty of care 
Identify possible routine and non-routine problems in the equipment or process 
Determine problems needing action 
Determine possible fault causes 
Rectify problem using appropriate solution within area of responsibility 
Report problems outside area of responsibility to designated person 

Forms

Assessment Cover Sheet

PMC553070B - Design and construct moulds for fibrous plaster products
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:


Assessment Record Sheet

PMC553070B - Design and construct moulds for fibrous plaster products

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: