At the previous article, we talked about What is Dispensing technique, its application and why it is important when coming to chemical. At this part II, we will continue with key benefits of dispensing technique and some related certifications.
Key benefits of dispensing technique
Higher accuracy and precision: with optimized dispensing, exact application of the adhesive or sealant can be achieved, which enhances overall quality.
Higher process repeatability and reliability: the efficient process control provided by a dispensing system contributes to higher repeatability and reliability of the overall process.
Reduced defects: with efficient process control the required bead size and shape may be reached more easily, avoiding adhesion and cohesion failures.
Reduced cycle times: the efficient process control offered by a dispensing system enables shorter cycle times. The reduction may happen at different levels depending on the degree of automation.
Minimized rework: in certain cases improved application quality can minimize rework.
Lower material consumption and waste: as a result of higher accuracy material waste can be reduced and costs are therefore minimized.
Standards in Dispensing Technique
DIN 2304 - Adhesive bonding technology - Quality requirements for adhesive bonding processes
Consisting of three parts, this standard regulated the general adhesive bonding processes regardless of the industry.
The standard series specifies the requirements for quality-oriented design of bonded joints along the process chain of bonding, from development to production and maintenance.
The DIN 2304 consists of the following three core concepts:
1. Classification of boned joints in accordance with safety requirements
2. Appointment of supervisors in change of adhesive bonding work
3. Verification: Actual load < load limit of bonded joint
In addition to the DIN 2304, there is another standard regarding adhesive bonding, the DIN 6701 which regulates the use of adhesive bonding in the manufacturing of rail vehicles and parts of rail vehicles. This is a comprehensive set of regulations for quality assurance in adhesive bonding technology that will make its use safer and more reliable in the rail vehicle sector.
The classification of the adhesive bond is given by the responsible engineer with regard to the potential impact of its failure in the following safety classes:
|Safety classes||Definition of safety requirements|
High safety requirements
The failure of the adhesive bond can lead, directly or indirectly, to:
Medium safety requirements. The failure of the adhesive bond can lead to:
Low safety requirements. The failure of the adhesive bond can lead to:
No safety requirements. The failure of the adhesive bond can lead to:
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