Husky Injection Molding Systems Limited

Mold-masters (2007) Limited

Mold-masters Limited

Mht Mold Hotrunner Technology Ag

Manfred Lausenhammer

Arnold Heinz Mai

Robert D Schad

Witold Neter

Tiemo Dietmar Brand

John Di Simone

Christian Wagner

Christopher W Choi

Udo Schwarzkopf

Stanislaw Samotik

Frank Oster

Stephan Klang

Sven Mertes

Hai Luong

Ralph Gauss

A cavity insert for a mold stack is disclosed, the cavity insert being dimensioned to define a continuous annular cavity insert cooling chamber. The cavity insert also provides a first and second decompression chamber in fluid communication with each end of the cavity insert cooling chamber. Also disclosed is a chamber extension feature in fluid communication with the cavity insert cooling chamber to promote cooling in the downstream region of the cavity insert.

Cavity insert film flow cooling

A molding system is disclosed that includes a plurality of cavity portions or core block assemblies attached to a mold plate and a plurality of core portion or core block assemblies attached to a second mold plate, and a plurality of stripper rings or thread split-slide assemblies attached to a stripper plate assembly. The stripper plate assembly includes a main stripper plate with one or more stripper plate panels coupled thereto that are translatable away from the main stripper plate during installation of at least the core portions or core block assemblies. The one or more stripper plate panels may be translatable to fold, outwardly swing, and/or slide relative to the main stripper plate to clear any core portions or core block assemblies that may have been previously installed.

Quick-change molding system for injection molding

At least one mold is provided having a mold cavity and a mold gate communicating with the mold cavity, an injection nozzle for feeding molten plastic material to the injection mold having a nozzle outlet in line with the mold gate, and a thin movable valve gating arrangement positioned between the mold gate and nozzle outlet having an orifice therein permitting and shutting off flow of molten plastic from the nozzle to the mold.

Process and apparatus for forming plastic articles

A valve gating arrangement for an injection molding system having an insulated manner and a heated torpedo across from a gate. The valve gating arrangement includes a valve member sidably received within a passage extending through the torpedo. The valve member terminates at one end with a pin reciprocally movable into and out of the gate. An actuator is connected to the valve member to effect the reciprocal movement.

Valve gating arrangement for an insulated runner

An injection molding machine includes various devices for reducing injection cycle time. A molded article detection apparatus and method are disclosed. The detection system and method determines if an article, or a portion thereof, remains on a machine core pin after the article ejection cycle has occurred, and, if so, communicates this condition to both the machine controller and the take-out controller. This prevents the machine from starting a new cycle and damaging the injection mold. Also, by communicating the extraction status to both the take-out controller and machine controller, if no articles or portions remain, injection cycle time is reduced. Additionally, a variable vacuum pressure apparatus and method are described. The apparatus and method allows early removal of molded articles from the molds into a take-out plate while the parts are still warm.

Detection and removal system for reducing cycle time of an injection molding apparatus

The injection nozzle includes a longitudinal flow channel, a plurality of angular channels extending from the longitudinal flow channel (1) in a first direction at an acute angle with respect to the longitudinal axis of the nozzle, and (2) in a second direction at an acute angle with respect to the first direction, an annular channel extending from the angular channels, and a passageway extending from the annular channel to the injection orifice, wherein the angular channels cause a swirling action in the annular channel to flush out resin from the annular channel.

Injection nozzle and method

Apparatus for forming plastic articles

A valve gating apparatus and method for injection molding includes at least one shutter disposed between the gate and the cavity melt channel into a mold cavity. The shutter is moved laterally, between a closed position wherein flow of melt from the nozzle into the cavity is inhibited, and an open position wherein flow of melt into the cavity is unimpeded by the shutter. Intermediate these two positions, the shutter can be employed to reduce the cross sectional area of the gate to throttle the gate. Embodiments are disclosed wherein one shutter or pairs of shutters are employed to gate the gate. Further, when pairs of shutters are employed, the shutters can abut each other in the close position or can overlie each other. This novel design prevents generation of waste material and eliminates the need to have devices for removing cold plugs.

Valve gating apparatus for injection molding

The present invention relates to a method and a system for preventing mold flash. The method broadly comprises the steps of: introducing a fluid under pressure into a mechanism for applying a clamping force such as the clamping cylinder of a piston-cylinder unit; increasing the pressure of the fluid in the clamping force applying mechanism so as to apply a clamping force to the mold; injecting moldable material into the mold; measuring actual pressure in the clamping force applying mechanism; and determining whether the mold is close to blowing open when the moldable material is injected into the mold using the actual measured pressure in the clamping cylinder. The method further comprises providing an injection unit having an injection cylinder; supplying fluid under pressure to the injection cylinder; measuring the actual injection pressure of the fluid in the injection cylinder; and determining whether the actual injection pressure is below the pressure needed to blow the mold open under existing clamp conditions. The system of the present invention includes a pressure sensor for measuring the actual pressure within the clamping force application mechanism and a controller provided with logic for determining whether the mold is close to blowing open when the moldable material is injected into the mold using the measured actual clamp pressure.

Growing community of inventors

Konz, Germany

Manfred Lausenhammer