Draft for comments only Not to be cited as East African Standard

Transcription

1 EAST AFRICAN STANDARD Comb foundation mill Specification EAST AFRICAN COMMUNITY CD/K/658:2010 ICS EAC 2010 First Edition 2010

2 Foreword Development of the East African Standards has been necessitated by the need for harmonizing requirements governing quality of products and services in East Africa. It is envisaged that through harmonized standardization, trade barriers which are encountered when goods and services are exchanged within the Community will be removed. In order to meet the above objectives, the EAC Partner States have enacted an East African Standardization, Quality Assurance, Metrology and Test Act, 2006 (EAC SQMT Act, 2006) to make provisions for ensuring standardization, quality assurance, metrology and testing of products produced or originating in a third country and traded in the Community in order to facilitate industrial development and trade as well as helping to protect the health and safety of society and the environment in the Community. East African Standards are formulated in accordance with the procedures established by the East African Standards Committee. The East African Standards Committee is established under the provisions of Article 4 of the EAC SQMT Act, The Committee is composed of representatives of the National Standards Bodies in Partner States, together with the representatives from the private sectors and consumer organizations. Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the Partner States. The comments received are discussed and incorporated before finalization of standards, in accordance with the procedures of the Community. Article 15(1) of the EAC SQMT Act, 2006 provides that Within six months of the declaration of an East African Standard, the Partner States shall adopt, without deviation from the approved text of the standard, the East African Standard as a national standard and withdraw any existing national standard with similar scope and purpose. East African Standards are subject to review, to keep pace with technological advances. Users of the East African Standards are therefore expected to ensure that they always have the latest versions of the standards they are implementing. East African Community 2010 All rights reserved * East African Community P O Box 1096 Arusha Tanzania Tel: /8 Fax: / eac@eachq.org Web: * 2010 EAC All rights of exploitation in any form and by any means reserved worldwide for EAC Partner States NSBs. ii EAC 2010 All rights reserved

3 Introduction CD/K/658:2010 The comb foundation mill is used for embossing plain and pure beeswax sheets with the exact cell outline of the honeycomb for fixing into the frames of a beehive. Such embossed comb foundation sheets form a base for the bees to build up new combs. This helps to conserve the energies of bees to secure drawn-out combs of adequate cell-size duly related to natural body-size of local races of bees for. The main structure of the comb foundation mill consists of two rollers fixed horizontally close together in a cast iron frame. The surface of these rollers has a honeycomb cell design which embosses the comb foundation sheets. In the preparation of this East African Standard, the following sources were consulted extensively: IS 3894:1978(R2004), Specification for Comb Foundation Mill Codex Alimentarius website: USDA Foreign Agricultural Service website: USDA Agricultural Marketing Service website: USDA Plant Inspectorate Service website: European Union: Assistance derived from these sources is hereby acknowledged. EAC 2010 All rights reserved iii

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5 EAST AFRICAN STANDARD CD/K/658:2010 Comb foundation mill Specification 1 Scope This East African Standard specifies the requirements for the comb foundation mill used for embossing plain and pure beeswax sheets with the honeycomb cell outline. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. CD-K , Crude and refined beeswax Specification. CD/K , Beehives Specification CD-K , Comb foundation sheets Specification EAS 11, Galvanized plain and corrugated iron sheets Specification ISO 185, Grey cast irons Classification ISO 1052, Steels for general engineering purposes ISO , Rolling bearings Balls Part 1: Steel balls ISO 3755, Cast carbon steels for general engineering purposes ISO 21988, Abrasion-resistant cast irons Classification 3 Description The comb foundation mill shall have the following main parts (see also Figure 1): a) Frame; b) Rollers; 1) Roller body, 2) Roller shaft, and 3) Roller surface; c) Roller adjusting device; d) Roller springs (to keep the rollers in position); e) Handle; f) Gears; g) Bearings; h) Oil tubes (with spring cap); j) Water tub; k) Screws; and m) Alignment synchronizer. EAC 2010 All rights reserved 1

6 Figure 1 Comb foundation mill 2 EAC 2010 All rights reserved

7 4 Materials CD/K/658:2010 The materials for the manufacture of rollers, gears and bearings shall be as given in Table 1. For other parts, materials indicated in Table 2 may be used. 5 Shape and dimensions 5.1 Shape The shape of the comb foundation mill may be as given in Figure 1. Table 1 Requirements for materials for rollers, gears and bearings of the comb foundation mill S/No. Name of the part Material Conforming to Grade (1) (2) (3) (4) (5) i) Rollers: a) Roller body Fringed steel ISO 3755 C 40 b) Roller shaft) White metal ISO 185 c) Roller surface ii) Gears Fringed steel ISO 3755 C 40 iii) Bearings Cast iron ISO B Table 2 Requirements of materials for other parts of the comb foundation mill S/No. Name of part (1) (2) (3) i) Frame Grey cast iron ii) Roller adjusting device Cast iron or any other suitable material iii) Handle Cast iron, fringed steel or any other suitable material iv) Water tub Galvanized steel sheet or any other suitable material 5.2 Dimensions The dimensions of the various components of the comb foundation mill (see Figure 1) as given in 6.2 to 6.7 pertain to a particular type and are for guidance only. 6 Assembly 6.1 Frame The cast iron frame shall be suitably designed to hold the rollers (see 6.2) horizontally and to hold the water tub having a semi-circular bottom. The frame shall have suitable arrangement to fix the mill during operation. The construction of the frame shall be such that it remains stable during operation. 6.2 Rollers There shall be two rollers, namely, the top roller and the bottom roller. The surface of the rollers shall be engraved to have the hexagonal honeycomb cell outlines matching with the cellsizes specified in CD-K , so as to get the size of the cell embossed on plain beeswax sheets and also the cell walls shall very clearly stand out as prescribed in CD-K The minimum diameter of the rollers shall be 75 mm and the minimum length 100 mm. The rollers shall have suitable opening in the centre to allow the passage of the roller shaft (see 6.3). 6.3 Roller shaft The roller shaft shall be of fringed steel bar of at least 22 mm in diameter. The ends of the rollers shall fit into the bearings (see 6.6) provided on either sides. The groove shall be connected to the oil tube. 6.4 Roller adjusting device A suitable device shall be provided in the mill to adjust the clearance in steps of the top roller with the bottom roller as desired to get proper alignment. The steps may preferably be in 1, 1.5 and 2 mm. A suitable locking arrangement at the lowest recommended position shall be provided to avoid damage to the surface of the rollers. The gear shall remain loose on the top roller shaft. EAC 2010 All rights reserved 3

8 6.5 Alignment synchronizer A suitable device shall be provided so as to have synchronized alignment of the two rollers. 6.6 Bearings There shall be four bearings at the ends of the two rollers to support the roller shafts. The bearings shall have openings in the centre to allow the passage of the roller shafts. The bearings shall be so assembled as to be easily lubricated and replaced, when desired. 6.7 Gears There shall be four fringed steel spur gears. The width of the teeth of the gears shall be about 20 mm, module 2 (12 DP) and number of teeth 30. These may be cast integrally with roller shafts. 6.8 Handle The handle shall be suitably fixed into the shaft of the bottom roller. A suitable grip shall be provided. The handle shall be operated sideways. 7 Workmanship and finish 7.1 Frame The frame shall be free from blow holes and cracks and the surface of the frame shall be made smooth. The frame may also be enamel-sprayed. 7.2 Water Tub The water tub of the mill shall be properly brazed or to avoid leakage. 7.3 Gears The gears shall be finely machined all over. 7.4 Handle The handle may be spray-enamelled. 7.5 Screws All removable screws shall be made rust proof independently before assembly. 7.6 All mechanical parts should be suitably galvanized to prevent rusting. 8 Marking and packing 8.1 Marking The comb foundation mill shall be marked with the following particulars: a) Manufacturer's name or recognized trade-mark; b) Year of manufacture; and c) Batch or code number Subject to an agreement between the purchaser and the vendor, the marking may be done on a brass plate soundly soldered to the frame of the comb foundation mill Each comb foundation mill may also be marked with a Certification Mark 8.2 Packing The comb foundation mill shall be packed as agreed to between the buyer and the supplier. 4 EAC 2010 All rights reserved

9 Rolling mills with motor 230 V. 50 HZ, length of rolls 450 mm. Cell size 5.4 ( 800 cells per dm 2 ). Brut weight 76 Kg Rolling mills with hand driving, length of rolls 320 mm. Cell size 5.4 mm (800 cells per dm 2 ). Rolling mills with motor 230 V. 50 HZ, length of rolls 320 mm. Cell size 5.4 ( 800 cells per dm 2 ) EAC 2010 All rights reserved 5

10 Comb foundation milling machines 6 EAC 2010 All rights reserved

11 EAC 2010 All rights reserved