DIN EN 453:2015 pdf free.Nahrungsmittelmaschinen -Teigknetmaschinen -Sicherheits- und Hygieneanforderungen; Englische Fassung EN 453:2014,Englische Ubersetzung von DIN EN 453:2015-04
5 Safety and hygiene requirements and/or protective measures
5.1 General
Machinery shall comply with the safety requirements and/or protective measures of this clause.In addition, the machine shall be designed according to the principles of EN ISO 12100 for relevant but not
significant hazards, which are not dealt with by this document.
5.2 Mechanical hazards
5.2.1 General
The safety related parts of the control system shall present at least a performance level “c” defined in accordance with EN ISO 13849-1:2008.
When fixed guards, or parts of the machine acting as such, are not permanently fixed, e.g. by welding, their fixing systems shall remain attached to the guards or to the machinery when the guards are removed.
5.2.2 Zone I — Volume covered by the movement of the kneading tools
NOTE Usual conditions of use involve taking samples, adding some ingredients, scraping or taking away dough from the inside of the bowl in order to be able to test its consistency or to measure its temperature. Accordingly, an opening is necessary on the top of the bowl. This means that for these machines it is not possible to comply with the safety distances given by EN ISO 13857. The strategy for selecting safety measures from EN ISO 12100 gives the following requirements and/or measures.
5.2.2.1 Access from above shall be prevented while the tool is moving. This may be achieved by a movable interlocking guard covering the top of the bowl. The bowl itself when in working position prevents access from other directions.
If the bowl is removable the bowl and kneading tool drive mechanisms shall not be capable of operation when the bowl is removed.
Guards may be, for example, hinged or move up and down vertically and be linked to suitable actuated position detectors functioning in the positive mode in compliance with EN ISO 14119:2013, 5.4. Position detectors themselves shall comply with EN ISO 14119:2013, 5.2 and 5.3.1, and any rotary or linear cams with EN ISO 14119:2013, 5.3.2.
To minimize the possibility of defeat the interlocking mechanism shall be designed taking into account EN ISO 14119:2013, Clause 7, for example by being located within the machine housing.
When there is an opening to enable the operator to see and take dough samples during the kneading process it shall be entirely within the hatched area shown in Figure 2. This opening shall have a self-closing lid.
This hatched area shall be located on the bowl side opposite the kneading tool zone, and it shall have the dimensional characteristics shown in Table 2. If the guard has holes, openings shall comply with EN ISO 13857:2008, Table 4.
The measurements of the interlocking guard can be deduced from Table 2 in relation to Figure 2.DIN EN 453 pdf download.