US 4,043,486 AGranted

Mixing apparatus

AssigneeCincinnati Milacron Inc.

InventorJerry Dale Wisbey

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Abstract

A mixing and dispensing apparatus for liquids that react chemically with each other from plural independent sources mixes same, and then cleans itself by injecting a terminal portion thereof into a mold. The mixing and dispensing means is intended to be incorporated into a system that provides measured quantities of the respective liquids, has control valving external of the mixing and dispensing means of the invention, and can recirculate the respective liquids except during actual mixing and dispensing. The mixing and dispensing apparatus has porting and passageways in its housing to permit recirculation and has a plunger which can be adjusted in its stroke to cover or uncover a certain amount of the mixing ports through which the respective liquids flow into the mixing chamber thence into the mold cavity. A stroke of the plunger sweeps the terminal portion of the reacting liquid mixture out of the mixing chamber, forcing it into a mold, thus cleaning the mixing chamber and packing the mixture in the mold cavity.

Claims16

Dependent claims

Apparatus for mixing a plurality of liquids and discharging the resulting mixture into a mold runner or cavity downstream thereof comprising:

a housing having walls;
a mounting bore through said housing;
a sleeve secured in one end of said mounting bore providing a fluid-tight seal between first and second regions within and both at the same end of said mounting bore and having a mixing chamber bore defined therewithin, first and second ports communicating through said sleeve directly into said chamber, respectively, from said first and second regions;
first and second passageways, each for a fluid, through said housing walls into communication with said respective first and second regions;
an elongated plunger slidably fitted in said mixing chamber bore and peripherally engaging with a hydraulic fit the continuous walls of said mixing chamber;
a drive means for reciprocating said plunger supported on said housing and including therein a driving fluid chamber within said mounting bore substantially coaxial with said plunger axis, a drive piston reciprocably fitted therein and secured to one end of said plunger, and fluid port means for communicating to said driving fluid chamber to admit and remove driving fluid to at least one face of said piston, said piston being disposed between said mixing chamber and the hereafter said stroke adjusting means the three of which are substantially coaxial with said plunger;
and
stroke adjusting means mounted on said drive means for adjusting the stroke of said piston hence to adjust the stroke of said plunger and being adjustable over a range to position the other end of said plunger sufficiently prior to a mixing procedure to block said first and second ports and during mixing at least partially to unblock said first and second ports.

5 more elements

Apparatus for mixing a plurality of liquids and comprising:

a housing having walls;
a mixing chamber surrounded by the walls of said housing;
a sleeve mounted within said housing and defining a bore by the internal walls therewithin, a portion of said bore being said mixing chamber;
an elongated plunger slidably fitted in said mixing chamber and peripherally engaging with a hydraulic fit the walls of said mixing chamber;
a drive means for reciprocating said plunger supported on said housing and including therein a driving fluid chamber supported by the housing to be substantially coaxial with said plunger axis, a drive piston reciprocably fitted therein and secured to one end of said plunger, and fluid port means for communicating to said driving fluid chamber to admit and remove driving fluid to at least one face of said piston;
stroke adjusting means mounted on said drive means for adjusting the stroke of said piston hence to adjust the stroke of said plunger;
first and second ports opening directly into said mixing chamber through the bore walls of said sleeve and from respective positions substantially opposite each other;
first and second passageways for fluid through the walls of said housing and connected, respectively, to said first and second ports;
said stroke adjusting means being adjustable to move said plunger sufficiently to block and to at least partially unblock said ports;
and
said piston being disposed between said mixing chamber and said adjusting means the three of which are substantially coaxial with said plunger.

8 more elements

Dependencies are inferred from the claim text.