Dispensing assembly and method for dispensing a mixed fluid

A dispensing assembly for reducing or preventing a lead-lag condition while dispensing a mixture of a first fluid component and a second fluid component, comprising;

• a first barrel having first chamber, a second barrel having a second chamber, the first and second chambers for containing the first and second fluid components;
• a mixer insert having a first and a second mixer inlet, the first and second mixer inlets respectively in fluid communication with the first and second chamber;
• a nozzle, including a nozzle body having a nozzle inlet and a nozzle bore extending therethrough, the nozzle inlet having a first cavity portion and a second cavity portion, the first and second cavity portions respectively extending from the nozzle inlet to a first inner surface and a second inner surface, the first and second inner surfaces being bounded between the nozzle inlet and the nozzle bore such that the first cavity portion defines a first cavity volume and the second cavity portion defines a second cavity volume, the first cavity volume is smaller than the second cavity volume, and the nozzle inlet receives the mixer insert at least partially therein to fluidly separate the first and second cavity portions;
• a channel extending through the first inner surface to the nozzle bore that further defines the first cavity portion;
• a first passage collectively defined between the mixer insert and the first inner surface, the first passage configured to direct the first fluid component along the channel and into the nozzle bore;
• and
• a second passage collectively defined by the mixer insert and the second inner surface, the second passage configured to direct the second fluid component into the nozzle bore,
• wherein the first and second passages are adapted to direct the first and second fluid components into the nozzle bore to form a pre-mixed fluid having a predetermined ratio of first and second fluid components, the nozzle being adapted to mix the pre-mixed fluid for dispensing a mixed fluid from the nozzle.

A method for reducing or preventing a lead-lag condition with a mixer insert at least partially positioned within a nozzle inlet while dispensing a mixture of a first fluid component and a second fluid component from a nozzle bore of a nozzle, the nozzle inlet includes a first cavity portion and a second cavity portion extending from the nozzle inlet to a first inner surface and a second inner surface, the method comprising;

• forcing the first and second fluid components through the mixer insert and into a first passage and a second passage, respectively, the first passage defined between the mixer insert and the first inner surface, the second passage defined between the mixer insert and the second inner surface of the nozzle inlet, the first and second inner surfaces being bounded between the nozzle inlet and the nozzle bore to define a first cavity volume and a second cavity volume, respectively, and the first cavity volume is smaller than the second cavity volume;
• forcing the first fluid component through the first passage and along a channel extending through the first inner surface to the nozzle bore;
• forcing the second fluid component through the second passage and into the nozzle bore;
• increasing the velocity of the first fluid component for generally preventing the lead-lag condition;
• positioning the first fluid component adjacent to the second fluid component in a nozzle bore of the nozzle for forming a pre-mixed fluid;
• mixing the pre-mixed fluid into a mixed fluid;
• and
• dispensing the mixed fluid from the nozzle.