High-Stress Seals for Injection Molding Machines
AssigneeIncoe Corporation
InventorMichael Goinski
Life of this patent
Estimating the term…
Abstract
A high-stress seal for injection molding machines, intended for sealing the gap between the injector nozzle and the injector rail of the tool. The seal in the ingate area is designed in a dome shape with an opening in the top of the dome for flux to enter. Correspondingly, the injector nozzles and the opposing wall of the injector rail of the tool have a dome-shaped design and are spatially adapted to the seal. This construction provides the seal with very dense, firm placement when the injector is pressed into the tool recess, and flux under high pressure cannot dislodge it.
Claims20
A high-stress seal for an injection molding melt delivery system including a nozzle with nozzle cap connected to a manifold through which plastic resin flows through a flow channel and a tool having an injection side portion about the nozzle and nozzle cap and an ejection side portion, the seal comprising:
- an outer and inner surface area, wherein said inner surface area is shaped according to the outer surface area of the nozzle tip of the nozzle and said outer surface area is shaped according to the inner surface area of the injection side portion of the tool;
- and
- an opening in said seal extending between the outer and inner surface areas allowing plastic resin to flow through the nozzle from the injection side portion of the tool to the ejection side portion of the tool, wherein said seal is formed to fit within a space between the nozzle tip and the injection side portion of the tool, and in which the nozzle tip and the opposing wall of the injection side portion of the tool are spatially adapted to said similarly designed seal;
- wherein said seal has such a form that when placed within the space between the nozzle tip and the injection side portion of the tool, the contact pressure of the seal against the sealing surface is strengthened by the pressure of the molten plastic resin.
A high-stress seal for use in an injection molding melt delivery system comprising:
- an annular gap seal for securing a gap between two coplanar surfaces that surround a flow channel for molten plastic resin, wherein said seal is formed such that said seal seats within the space between the two opposing parts to be sealed and said seal is strengthened and cannot be measurably pushed out of place or moved from said gap when contact pressure of the molten plastic resin occurs against the sealing surface of said seal.
A high-stress seal for use in an injection molding melt delivery system comprising:
- an annular gap seal for securing a gap between two coplanar surfaces that surround a flow channel for molten plastic resin, wherein said seal is formed of high-temperature sealant material having a profile such that said seal fits within a space between the two opposing parts to be sealed and said seal is strengthened and can withstand pressures of up to 2500 bar and wherein said profiled seal cannot be measurably pushed out of place or moved from said gap when contact pressure of the molten plastic resin occurs against the sealing surface of said seal.
Dependencies are inferred from the claim text.