INJECTION MOLDING OF CROSSLINKING POLYMERS USING STRAIN DATA

    公开(公告)号:US20210268705A1

    公开(公告)日:2021-09-02

    申请号:US17321908

    申请日:2021-05-17

    Applicant: IMFLUX INC.

    Abstract: Non-time dependent calculated variables based on measured strain are used to effectively determine an optimal hold profile for an expanding crosslinking polymer part in a mold cavity. A system and/or approach may first inject molten expanding crosslinking polymer into a mold cavity, then measure strain at the mold cavity or at another location within the injection molding system, and then calculate at least one non-time dependent variable during an injection molding cycle. Next, the system and/or method commences a hold profile for the part, and upon completing the hold profile, the part is ejected from the mold cavity, whereupon a cure profile is commenced.

    Method for controlling valve gates using one or more strain gauges

    公开(公告)号:US10894349B2

    公开(公告)日:2021-01-19

    申请号:US15816457

    申请日:2017-11-17

    Applicant: IMFLUX INC.

    Abstract: A method of monitoring and controlling a sequential valve gate molding apparatus in an injection molding or other molding process is disclosed. The method includes creating a target strain profile, receiving a deviation limit, receiving a change in strain relating to a first valve gate from a first strain gauge, identifying whether a deviation exists from a first portion of the target strain profile based on the output from the first strain gauge, determining whether any existing deviation exceeds the deviation limit, and adjusting the position of a first valve gate pin in the first valve gate if it does. The method may further include control of subsequent valve gates. Multiple strain gauges may be used to control a single valve gate, and/or each strain gauge may control more than one valve gate.

    Porous insert for nozzle of an injection molding system

    公开(公告)号:US10737420B2

    公开(公告)日:2020-08-11

    申请号:US16259624

    申请日:2019-01-28

    Applicant: IMFLUX INC.

    Abstract: A nozzle assembly for an injection molding system has a nozzle adapter with one or more vent holes therein. A porous metal insert is provided in fluid communication with at least one of the vent holes. The porous metal insert is also in fluid communication with a flow channel through the nozzle assembly. As molten polymeric material advances through the flow channel from a barrel to a mold assembly, gases entrained in the molten polymeric material are vented through the porous metal insert and escape through the one or more vent holes. Pressurized air may be introduced through the vent holes, such as by one or more blow-back modules, to unclog pores of the one or more porous metal inserts between shots of the injection molding system.

    METHODS FOR CONTROLLING INJECTION MOLDING PROCESSES BASED ON ACTUAL PLASTIC MELT PRESSURE OR CAVITY PRESSURE

    公开(公告)号:US20200086542A1

    公开(公告)日:2020-03-19

    申请号:US16562530

    申请日:2019-09-06

    Applicant: IMFLUX INC.

    Abstract: A method for controlling an injection molding process based upon an actual plastic melt pressure including identifying an optimal actual plastic melt pressure curve over time based on a baseline cycle, and adjusting in a subsequent cycle an injection pressure in order to cause a monitored pressure of the molten thermoplastic material to follow the optimal actual plastic melt pressure curve over time. A method for controlling an injection molding process based upon an plastic melt pressure setpoint adjusted using a cavity pressure, wherein the cavity pressure is multiplied by a process factor. Further, a method for controlling an injection molding process using real time cavity pressure including identifying an optimal cavity pressure curve over time based on a baseline cycle and adjusting, in a subsequent cycle, an injection pressure in order to cause a monitored cavity pressure to follow the optimal cavity pressure curve over time.

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