초록 ▼

Progammable computer controlled reaction injection mixing of selectively variable reactive fluid polymerizable components is disclosed, embodying an improved reactive injection mixing head construction which facilitates rapid changes in mix formulations between successive pour or molding operations

Progammable computer controlled reaction injection mixing of selectively variable reactive fluid polymerizable components is disclosed, embodying an improved reactive injection mixing head construction which facilitates rapid changes in mix formulations between successive pour or molding operations in a continuing succession of such operations, while maintaining consistently uniform results in the finished products.

대표청구항 ▼

In a system incorporating a high pressure reaction injection mixing head for mixing selected ones of different fluid components to produce polymeric molding mixtures whose compositions may be rapidly changed between successive pour cycles in filling a series of molds, the combination of: separate fl

In a system incorporating a high pressure reaction injection mixing head for mixing selected ones of different fluid components to produce polymeric molding mixtures whose compositions may be rapidly changed between successive pour cycles in filling a series of molds, the combination of: separate flow paths including means for storing, transporting to said mixing head and recirculating to storage each component individually and including in each separate flow path apparatus for inducing a high pressure in that component as it enters said head during a mix/pour cycle of said head; programmable computer means for selectively pre-setting said high pressure and the time of flow under said pressure of each component during a mix/pour cycle, said computer including means for producing base reference signals characteristic of the respective pressure and flow time selected for each component; component sensing means for each component producing signals characteristic of the pressure and flow times actually occurring during the mix/pour cycle; comparator means producing signals responsive to any difference between the signals from said respective component sensing means and said base reference signals; and means sensitive to said comparator response to vary the output of said high pressure inducing apparatus so as to effect cancellation of said comparator response.