EN 12890:2000

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Order information and delivery conditions
  4.1 General
  4.2 Points to be agreed
  4.3 Mandatory information
5 Classification
6 Specifications
  6.1 General
  6.2 Designation
7 Manufacturing requirements
  7.1 Materials
  7.2 Manufacture
  7.3 Contractions
  7.4 Tapers
  7.5 Clearances
  7.6 Required machining allowances (RMA)
  7.7 Dimensional tolerances
  7.8 Surface coating
8 Quality control
9 Usage
  9.1 General
  9.2 Identification
  9.3 Modifications
  9.4 Repair and refurbishment
  9.5 Protection and packaging for transportation and storage
Table 1 Quality classes for patterns, pattern equipment and
         coreboxes
Table 2 Quality classes - patterns, pattern equipment and
         coreboxes made of wood
Table 3 Quality classes - patterns, pattern equipment and
         coreboxes made of metal
Table 4 Quality classes - patterns, pattern equipment ant
         coreboxes made of plastic
Table 5 Characteristics of patterns and pattern equipment
Table 6 Characteristics of coreboxes
Table 7 Tapers
Table 8 Surface coatings (painting and colour-coding of
         patterns, pattern equipment and coreboxes
Figure 1 Examples of clearance of core prints (vertical core)
Figure 2 Example of clearances of core prints (horizontal
         core)
Figure 3 Values of clearances of core prints (for moulding
         with horizontal joint surface)
Annex A (informative) Guidelines on the use of tables in this
         standard
Annex B (informative) Reference values for linear casting
         contractions
Bibliography

This Standard specifies the requirements for patterns, pattern equipment and coreboxes for the production of sand moulds and/or sand cores. This Standard does not specify equipment for the production of lost patterns, permanent moulds and die casting dies. This Standard does not specify the requirements for ancillary items used in the manufacture of pattern equipment (such as screws, dowels, etc.).