Topic
Hot runner
About: Hot runner is a research topic. Over the lifetime, 2658 publications have been published within this topic receiving 9545 citations.
Papers published on a yearly basis
1 / 2
Papers
Patent•
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26 Nov 1997
TL;DR: In this paper, a hot runner nozzle structure provides insulation to reduce heat transfer to a utilizing tool and to increase accuracy of temperature measurement and control, and a shaft foot of extremely low heat conductivity is used to separate a point of contact between a feed tube shaft and the tool.
Abstract: A hot runner nozzle structure provides insulation to reduce heat transfer to a utilizing tool and to increase accuracy of temperature measurement and control. A shaft foot of extremely low heat conductivity is used to separate a point of contact between a feed tube shaft and the tool. The shaft foot may be formed of titanium for example. An insulating cap of extremely low heat conductivity is surrounds the shaft foot in the vicinity of the nozzle tip. The cap may be formed of PEEK or of titanium for example. Gaps may be provided between the insulating cap and shaft foot and between the shaft foot and feed tube shaft. In an alternate embodiment having smaller dimensions, an insulating ring is provided at the end of the feed tube shaft. The structure, combined with a positioning sleeve surrounding the feed tube shaft, permits placing a heat sensor much closer to the nozzle tip in order to obtain more accurate temperature measurements.
111 citations
Patent•
16 Jul 1984
TL;DR: In this paper, a pressure molding machine of the type having a floating manifold including thermal expansion support elements for sealing and centering the nozzles relative to the floating manifold is described.
Abstract: A pressure molding machine of the type having a floating manifold including thermal expansion support elements for sealing and centering the nozzles relative to the floating manifold.
104 citations
Patent•
2 Jul 2002
TL;DR: Improved mold manifold and hot runner nozzle using thin film elements include at least one active or passive thin film element disposed along a melt channel between the manifold inlet and the hot runners nozzle as discussed by the authors.
Abstract: Improved mold manifold and hot runner nozzle using thin film elements include at least one active or passive thin film element disposed along a melt channel between the manifold inlet and the hot runner nozzle. Preferably, the thin film element may comprise a thin film heater in direct contact with the molten resin and position to aid in the heat and flow management of the resin within the melt channel. Thin film temperature sensors, pressure sensors, and leak detectors may also be provided in the vicinity of the melt channel to enhance process control in the injection molding machine.
91 citations
Patent•
28 Aug 1998
TL;DR: In this article, a coinjection molding system for injecting skin and core material into a mold cavity is described, which includes a three position actuator for moving a valve pin into a closed position, a middle position, and an open position.
Abstract: A coinjection molding system for injecting skin and core material into a mold cavity. The system includes a three position actuator for moving a valve pin into a closed position in which neither skin nor core flow is permitted, a middle position in which only skin flow is permitted, and an open position in which skin and core flow is permitted. The actuator includes a first piston slidably mounted in an actuator housing, and a second piston, attached to the valve pin, slidably mounted within the first piston. A shut-off is provided in the manifold for preventing skin flow to a particular nozzle during sequential gating.
91 citations
Patent•
4 Apr 1997
TL;DR: In this paper, an injection molding nozzle is provided that includes a heater disposed about an insert seated in the nozzle body, providing extra heat about the insert where heat loss to the mold can cause a reduction in melt temperature.
Abstract: An injection molding nozzle is provided that includes a heater disposed about an insert seated in the nozzle body. The heater provides extra heat about the insert where heat loss to the mold can cause a reduction in melt temperature. The heater remains on from one injection cycle to the next injection cycle. In one embodiment, a thermocouple is used to measure the temperature about the insert so that the intensity of the heater can be adjusted accordingly. The heater can also be used with nozzles used in multiple nozzle applications to balance the flow of the nozzles.
84 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 13 |
| 2020 | 47 |
| 2019 | 100 |
| 2018 | 134 |
| 2017 | 192 |
| 2016 | 181 |