Sequential injection molding process

DETAILED DESCRIPTION OF THE DRAWINGS FIG.
1 shows a side view of a typical lay out of the sequential molding machine of the present invention with the distributor block broken away for clarity; FIG.
2 is a view similar to FIG.
1 showing the opposite molding station open with the molded part poised for removal; FIG.
3 is an additional side view showing both mold stations in the closed condition with primary and secondary clamp means in operation; FIG.
4 is a side of the machine with the molded parts remover or robot in an open mold retrieving a part; FIG.
5 is a top plan view of the illustration of FIG.
4; FIG.
6 is similar to FIG.
5 showing the robot in the opposite molding station; FIG.
7 is a plot of the machine sequence of operation charting the position of the various machine accessories against the step by step generation of the molded parts; FIGS.
8, 9 and 10 show an alternative arrangement of primary and secondary injection means serving two molding stations; FIG.
11 is a plan view of an injection molding machine with an alternative secondary or parting line clamp structure; FIG.
12 is a schematic illustration of details of the structure and mounting means of the alternative secondary clamp of FIG.
11; FIG.
13 is a plan view of a machine modification in which a plurality of primary injection means are utilized in combination with a plurality of distributor blocks and corresponding secondary injection means; FIG.
14 is a side view of an additional machine modification shows double sets of primary and secondary injection means and robots servicing four mold stations; FIG.
15 is a chart detailing the operating sequence of the machine of FIG.
14; FIG.
16 is a side view of an alternative machine arrangement facilitating molding piece parts in the same physical orientation using a single primary injection means; FIG.
17 is similar to FIG.
16 modified to use two primary injection units, and; FIG.
18 is a cycle chart for the FIG.
17 modification.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS