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US 11,639,036 B2Granted
Reinforced thermoplastic and fabric injection overmolding
AssigneeToledo Molding & Die, Inc.
InventorJonathan Michael Garrett
Life of this patent
Estimating the term…
Abstract
An LWRT plus fabric injection overmolding process for the direct injection molding of thermoplastic features onto the B-side of a formed, finished Light Weight Reinforced Thermoplastic panel. The panel having an A-side finish cloth, non-woven, TPO, Vinyl or similar material placed into the injection molding press and injection molding tool, and then the features are injection molded onto the panel without damaging the A-side finish.
Claims13
A method of injection molding thermoplastic comprising the steps of:
- inserting a Light Weight Reinforced Thermoplastic (LWRT) having an A-side with a fabric finish and a B-side into a molding tool having adjustable mold standoffs positioned in the molding tool around the LWRT with fabric inserted panel, said A-sided including a finish selected from a cloth, non-woven, TPO, or vinyl material;
- controlling temperatures of incoming injection molding resin to said molding tool;
- balancing pressures of incoming injection molding resin to said molding tool;
- adjusting tool standoffs for tonnage building in said molding tool to control clamping force exerted on said LWRT fabric, said tool standoffs are constructed and arranged to control an injection molding machine's clamp pressure/force on the LWRT fabric so to resist flashing of the injection molded plastic;
- forming injection molding features on said B-side;
- wherein said LWRT plus fabric inserted part receives injection molding features on the B-side of the LWRT without damaging the LWRT or fabric finish.
3 more elements
A method of injection molding thermoplastic comprising the steps of:
- inserting a Light Weight Reinforced Thermoplastic (LWRT) having an A-side with a fabric finish and a B-side into a molding tool having adjustable mold standoffs positioned in said molding tool, said A-side fabric inserted into said molding tool before a press is cycled, said A-sided including said fabric finish selected from a cloth, non-woven, TPO, or vinyl material;
- controlling temperatures of incoming injection molding resin to said molding tool by mold filling simulation software;
- balancing pressures of incoming injection molding resin to said molding tool by said mold filling simulation software;
- adjusting tool standoffs for tonnage building in said molding tool to control clamping force exerted on said LWRT fabric, said adjustable mold standoffs are constructed and arranged to be raised and lowered relative to the surround mold surface to control the amount of clamping force exerted onto said LWRT fabric plus panel;
- forming injection molding features on said B-side;
- controlling clamping force to resist flashing of said injection molded plastic;
- wherein said mold filling simulation software balances, controls, and limits the injection pressures requires to mold desired B-side features without damaging the LWRT plus fabric insert.
4 more elements
Dependencies are inferred from the claim text.