Ceramic rotor for RD dispenser

For decades, Vis­coTec has spe­cial­ized in dif­fi­cult dis­pens­ing appli­ca­tions with­in var­i­ous indus­tries. The dis­pens­ing tech­nol­o­gy spe­cial­ist focus­es its day-to-day opti­miza­tions of the prod­uct port­fo­lio accord­ing to the needs of its cus­tomers. The proven stain­less steel rotor has been fur­ther devel­oped for the reli­able dos­ing of abra­sive flu­ids such as ther­mal­ly con­duc­tive one- and two-com­po­nent gap fillers, one-com­po­nent heat-con­duct­ing pastes or high­ly filled two-com­po­nent adhe­sives. The new ver­sion in the form of a ceram­ic rotor enables sig­nif­i­cant­ly longer ser­vice lives of this core com­po­nent of the dis­pens­ing sys­tem. The ceram­ic rotor is ful­ly com­pat­i­ble with the dis­pens­ing and mix­ing sys­tems of the Vis­coTec RD dis­penser series. It can there­fore be used in both one-com­po­nent and two-com­po­nent systems.

Exam­ples of appli­ca­tions of the rotor, which is espe­cial­ly suit­able for high­ly filled mate­ri­als, are:

• Tem­per­a­ture man­age­ment of sen­si­tive com­po­nents in the elec­tron­ics industry
• Ther­mal­ly con­duc­tive pot­ting applications
• Dis­pens­ing of sol­der pastes
• Tem­per­a­ture man­age­ment in E‑Mobility manufacturing

In order to fur­ther increase the ser­vice life of the already proven dis­pensers for high­ly abra­sive liq­uids and pastes, the per­for­mance of a wide vari­ety of ceram­ics was deter­mined in numer­ous tests. The results showed clear dif­fer­ences depend­ing on the type. The ceram­ic rotor incor­po­rat­ed in the port­fo­lio on the basis of these find­ings enables a sig­nif­i­cant increase in the ser­vice life of the dis­pens­ing sys­tem. First long-term tests show an increased ser­vice life by a mul­ti­ple than with con­ven­tion­al hard chrome-plat­ed stain­less steel rotors — the ceram­ic rotors did not  show any signs of wear until the end of the tests.

The well-estab­lished dis­pens­ing per­for­mance remains unchanged. There is no dif­fer­ence in the geo­met­ric depen­den­cies. This guar­an­tees a sim­ple con­ver­sion of exist­ing sys­tems to the ceram­ic rotor using Vis­coTec dis­pens­ing tech­nol­o­gy. The dis­pens­ing set­tings remain identical.

The rotor assem­bly is avail­able in two ver­sions, depend­ing on the require­ments of the mate­r­i­al to be dis­pensed: either as a ceram­ic rotor with hard chrome-plat­ed dri­ve shaft or as an all-ceram­ic ver­sion where both the ceram­ic rotor and the dri­ve shaft are made of ceram­ic. Which ver­sion makes sense in the respec­tive appli­ca­tion is deter­mined by the sales depart­ment togeth­er with the customer.

The first ceram­ic rotors are already inte­grat­ed into exist­ing dis­pens­ing sys­tems and are impres­sive. With a triple Vick­ers hard­ness, the sur­face is con­sid­er­ably hard­er than that of the stain­less steel rotors. When work­ing with high­ly abra­sive mate­ri­als, this results in sig­nif­i­cant­ly low­er wear and there­fore longer ser­vice life. Longer ser­vice life means longer main­te­nance inter­vals and con­se­quent­ly less down­time of the pro­duc­tion line. And more prof­it in the long run.