1、STD-BSI BS EN L2883-ENGL 2000 E Lb2Ybb7 08bb082 201 BRITISH STANDARD Founding - Equipment for the production of lost patterns for the lost wax casting process The European Standard EN 12883:2000 has the status of a British standard ICs 77.180 BS EN .2883:2000 NO COPYING WITHOUT BSI PERMISSION EXCEPT
2、 AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 12883-ENGL 2000 M 1624669 OBbb063 148 W BS EN 12883:2000 been prepared under the direction of the Engineering Amd. No. Date Sector Cornmittee, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 O BSI 08200
3、0 ISBN O 580 34217 4 National foreword Comments This British Standard is the official English language version of EN 12883:2000. The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/9, Foundry technology, which has the responsibility to: - aid enquirem to understand t
4、he text; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them in the UK. A list of organizations represented on this committee ca
5、n be obtained on request to its secretary. Cross-references The British Standarch which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index“, or by using the
6、 “Fhd“ facility of the BSI Sxmdards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from le
7、gal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document waslastissued. STD.BSI BS EN 1213133-ENGL 2000 m Lb
8、24bb OBbb084 084 EUROPEAN STANDARD EN 12883 NORME EUROPEENNE EUROPASCHE NORM June 2000 ICs 77.180 English version Founding - Equipment for the production of lost patterns for the lost wax casting process Fonderie - Outillages pour la production de modles perdus pour le procd de moulage la cire perdu
9、e Gieereiwesen - Einrichtungen zur Herstellung von verlorenen Modellen for das Wachsausschmelzverahren This European Standard was approved by CEN on 24 December 1999. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this Europeen Sta
10、ndard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning aich national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French
11、, German). A version in any other language made by traislation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as he official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmar
12、k, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPAISCHES KOMITEE FOR NORMUNG Central Secretariat: rue de Stassart, 36 B-10
13、50 Brussels 8 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12883:2000 E STD-BSI BS EN L2883-ENGL 2000 1624669 0866085 TL0 II Page 2 EN 12883:2000 Contents Page Page 3 Foreword . 4 Introduction 5 1 Scope 2 Normative referenc
14、es 5 3 Terms and definitions 5 4 Order information and delivery 7 conditions 7 4.2 Points to be discuss . 4.3 Mandatory information . 8 4.1 General 7 5 Classification 9 10 6 Specifications . master patterns 10 6.2 Designation 6.3 Sub-contracted services 10 6.4 Mass 10 Tooling filling systems 10 6.6
15、Tooling temperature . 10 6.1 Drawings and/or numerical data and/or 10 6.5 7.3 Contraction(s) 13 7.4 7.5 Tolerances 13 7.6 Marking and labelling . 13 8 Quality control . 14 8.1 Inspection documentation 14 8.2 Samples . 14 9 Usage 14 9.1 General 14 9.2 Thermal stability . 14 9.3 Pressure (clamping and
16、 injection) . 14 9.4 Tooling handling 14 9.5 Tooling location, connection and 14 9.6 Pattern stripping and handling 15 9.7 Tooling assembly 15 9.8 15 9.1 O Packaging and protection . 15 15 Required machining allowances (RMA) . 13 . alignment . Prevention of pattern distortion 15 . 9.9 Repair and ref
17、urbishment 9.1 I Other requirements . Annex A (informative) Examples of a dimensional test report and a tooling checklist 16 7 7.1 Materials 1 O pressures for tooling designed 7.2 Manufacture . 11 for lost patterns . 18 Manufacturing requirements 1 O Annex B (informative) Temperatures and Q BSI 08-2
18、000 STD.BS1 BS EN 12883-ENGL 2000 0 1b24bb 0866086 957 Page 3 EN 12883:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 190, Foundry Secretariat of which is held by DIN. technology, the This European Standard shall be given the status of a national standard, eithe
19、r by publication of an icmtical text or by endorsement, at the latest by December 2000, and conflicting national standards shall be withdrawn at the latest by December 2000. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound t
20、o implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Within its programme of work, Technical Committee CENTTC 190 request
21、ed CEN/TC 19OMIG 1.30, Production equipment, tools, foundry auxiliaries (e.g. patterns, permanent moulds, moulding materials), to prepare the following standard: prEN 12883 Founding - Equipment for the production of lost patterns for the lost wax casting process. This is one of three of European Sta
22、ndards for foundry patterns and tools. The other standards are: EN 12890 Founding - Patterns, pattern equipment and coreboxes for the production of sand moulds and sand cores. EN 12892 Founding - Equipment for the production of lost patterns for the lost foam casting process. Q BSI 08-2000 STD.BSI B
23、S EN 128B3-ENGL 2000 E l1b24bb 0866087 893 m Page 4 EN 12883:2000 Introduction Lost pattern production processes involve the moulding of a pattern. The pattern is then destroyed either prior to or during the casting process. At present two processes are commonly used: - investment casting (lost wax
24、process); - lost foam process. This standard concerns the lost wax process. This standard describes the specification for tooling to produce patterns or cores for the lost wax process. This standard is intended for purchasers, manufacturers and founders. It is also intended to ensure correct interpr
25、etation of part and tool drawingdnumencal data, and to ensure pattern equipment will produce lost moulds and lost cores, suitable for use and to assist in determining the usually undefined limits of good workmanship. It stresses the need for consulation between the founder, manufacturer (patterns),
26、manufacturer (tooling) and purchaser before work commences. This standard is intended to assist interested parties in producing tooling for lost wax patterns suitable for use to produce castings by the lost pattem process. There is a complex relationship between the parties who might be involved in
27、specifying, manufacturing, ordering and designing the equipment within the scope of this standard. NOTE: Figure 1 gives an indication of the relationships that could exist between the four parties concerned. Figure 1 - Model inter-relationship between contracting parties This standard not only speci
28、fies the usual features of design, manufacture, materials, tolerances, contractions and required machining allowances but also specifies other features such as usage, classification, quality control, marking, packaging and storage. 8 BSI 08-2000 1 Scope This standard specifies the requirements for t
29、ooling for the production of lost patterns for the lost wax process including soluble wax cores, and the production of ceramic cores. This standard does not specify equipment used to produce castings by the Shaw process. This standard does not specify the processes which directly generate the lost p
30、attern(s) by means of numerical data such as stereolithography or sintered wax process or laminated object manufacturing (LOM). 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the ap
31、propriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the pub
32、lication referred to applies. EN 10204 Metallic products - Types of inspection documents. EN 20286-1 IS0 system of limits and fts - Part 1 : Bases of tolerances, deviations and fts (IS0 286-1 :1988). IS0 8062: 1994 Castings - System of dimensional tolerances and machining allowances. 3 Terms and def
33、initions For the purposes of this standard, the following terms and definitions apply. 3.1 ceramic core preformed refractory aggregate inserted into a wax or plastic pattern to shape the interior of that part of a casting which cannot be shaped by the pattern NOTE: Sometimes wax is injected around t
34、he pre-formed core. 3.2 collapsible insert part made in two or more pieces to permit withdrawal from an undercut pattern surface 3.3 contraction provision applied to the tooling for shrinkage occurring during the production of castings 3.4 cast tooling process method whereby tooling is made either f
35、rom a low melting point metal alloy, normally cast under pressure, or from a resin, cast around a master pattern 3.5 dowel register component which ensures accuracy of fit or alignment between mating portions of the tooling O BSI 08-2000 STD*BSI BS EN 12883-ENGL 2000 - 1624bb9 0866089 666 m Page 6 E
36、N 12883:2000 3.6 fixing one or more components which ensure that the parts of the tooling are held together securely and accurately 3.7 insert or loose piece part which is removed by hand or by mechanical means from the pattern before or during stripping and is then repositioned in the tooling 3.8 l
37、ost wax process pattern casting process in which wax or fusible resin is used NOTE: The pattern is surrounded by a refractory slurry. After the mould is dry, the pattern is melted or burned out of the mould cavity and molten metal is poured into the resulting cavity. 3.9 manufacturer (patterns) pers
38、on or body responsible for the manufacture of lost wax patterns 3.10 manufacturer (tooling) person or body responsible for making the tooling and/or ancillary equipment required to produce a lost wax pattern 3.1 1 master pattern model used to produce a pattern which includes the appropriate contract
39、ions 3.12 mismatch offset conditions at parting line caused by misalignment 3.13 pattern wax or plastic-based shaped material 3.14 pattern injection process of filling the tooling cavity with wax or fusible resin material 3.1 5 soluble wax core dissolvable wax component used to produce the intemal g
40、eometry of the pattern 3.16 stripping action of removing the pattern from the tooling by hand or by mechanical means Q BSI 08-2000 STD-BSI BS EN L2883-ENGL 2000 LbilYbbS OBbbOSO 388 = Page 7 EN 12883:2000 3.17 taper drat angles on surfaces of tooling parts which enable the tooling parts or the lost
41、patterns to be withdrawn 3.18 tooling cavity intended space in the tooling into which pattern material is introduced 3.19 tooling all the equipment required for the production of a lost pattern (except for the machine used to inject the wax) 3.20 tooling filling system openings used to introduce the
42、 pattern material into the tooling 3.21 wax chill preformed solid wax piece introduced into the tooling cavity to prevent excessive shrinkage at the wax injection stage 4 Order information and delivery conditions 4.1 General There shall have been an agreement made and an exchange of information carr
43、ied out between the purchaser, the manufacturer (patterns), the manufacturer (tooling) and the founder by the time of acceptance of the order, to ensure a full understanding of the respective requirements of the parties concerned. 4.2 Points to be discussed As applicable, the following essential poi
44、nts shall be considered during the negotiation stage: - casting material(s) and its (their) identification; - number of patterns to be produced; - pattern and /or core materials; - drawings andlor numerical data; - number of tooling cavities required; - contractions; -joint lines; -tapers; - compone
45、nts and identification of tooling; - required machining allowances; - machining provisions and tooling finishing requirements; -tooling materials; -tooling quality class; Q BCI 08-2000 STD=BSI BS EN 12883-ENGL 2000 H lb24bb9 08bb093 214 m Page 8 EN 12883:2000 - surface condition of the tooling cavit
46、y; - dimensional tolerances; -wax pattem stripping and cooling support systems; - tooling inspection requirements and inspection fuctures; - runnerlfeeder positions and, if necessary, the running system; -tooling accessories, such as cores, runners and wax chills; -any other important parameters, su
47、ch as surface protection and packaging for transport, storage, venting and assembling arrangements. 4.3 Mandatory information The enquiry and order shall include information on: a) number of toolings to be supplied and delivery requirements; b) specification(s) of the material(s) to be used in the m
48、anufacture of the tooling; c) relevant drawings andlor relevant numerical data; d) contraction(s) to be used; e) sizes and positions of any runners and feeders required; 9 position(s) and size(s) of wax injection hole(s); g) information on tooling mounting, connection and alignment; h) surface condi
49、tion required for the tooling cavity; i) inspection(s) and documentation required; j) relevant quality class; k) any functional tests required; and, as applicable: i) additional properties not specified in the material standards; m) special measures to be taken or specifications to be observed, particularly with regard to the testing of welds; n) repairs of tooling; o) type of protection and packaging; NOTE: Transport arrangements can be included. p) approval procedures; q) storage arrangements; r) any other requirements. Q BSI 08-2000 STDmBSI BS EN 12663-ENGL 2000 m Lb24bb
