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Inline Small-pitch Valve-gated Injection Molding Nozzle Assembly

IP.com Disclosure Number: IPCOM000176295D
Publication Date: 2008-Nov-11
Document File: 8 page(s) / 425K

Publishing Venue

The IP.com Prior Art Database

Abstract

An injection molding nozzle assembly includes an inlet component having an inlet for receiving molding material, a nozzle body connected to the inlet component and defining with the inlet component a molding material channel that extends from the inlet to a plurality of tip channels of the nozzle body, an actuator having an annular piston disposed around the molding material channel, and a plurality of valve pins connected to the piston and disposed in the nozzle body for opening and closing flow of molding material through the tip channels. A portion of the molding material channel follows a diverted path around the connection of the valve pins to the piston.

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Page 1 of 8

Injection Molding Nozzle Assembly

Abstract

An injection molding nozzle assembly includes an inlet component having an inlet for receiving molding material, a nozzle body connected to the inlet component and defining with the inlet component a molding material channel that extends from the inlet to a plurality of tip channels of the nozzle body, an actuator having an annular piston disposed around the molding material channel, and a plurality of valve pins connected to the piston and disposed in the nozzle body for opening and closing flow of molding material through the tip channels. A portion of the molding material channel follows a diverted path around the connection of the valve pins to the piston.

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Page 2 of 8

Injection Molding Nozzle Assembly

Field

The present invention relates to injection molding, and more specifically, to an injection molding nozzle assembly.

Description of the Figures

Embodiments of the present invention will now be described more fully with reference to the accompanying drawings in which:

Fig. 1 is a perspective view of an injection molding nozzle assembly according to an embodiment of the present invention;

Fig. 2 is a cross-sectional view of the injection molding nozzle assembly of Fig. 1;

Fig. 3 is another cross-sectional view of the injection molding nozzle assembly of Fig. 1; and
Fig. 4 is a plan view of the distribution component.

Detailed Description

Fig. 1 shows an injection molding nozzle assembly 100 according to an embodiment of the present invention. The injection molding nozzle assembly 100 can be used as part of a hot runner, hot half, or other injection molding apparatus.

The injection molding nozzle assembly 100 includes a nozzle 102 and an actuator 104. The nozzle 102 and the actuator 104 are separably connected to each other.

The nozzle 102 includes a nozzle body 106, a resistance wire heater 108 embedded in the nozzle body 106, a thermocouple (not shown), a plurality of nozzle tips 110 removably connected to the nozzle body 106, a sleeve 112 partially covering the nozzle body 106, a nozzle flange 114 connected to the nozzle body 106 for retaining the nozzle body 106 in a mold plate (or other mold component), and a terminal end 116 for heater and/or thermocouple leads.

The actuator 104 includes a cylinder 118, a cap plate 120, and a flange 122. The actuator 104 can be connected to a mold plate (or other mold component) by bolts 124 situated in bolt holes of the flange 122.

Also shown in Fig. 1 are fluid lines 126 for providing a working fluid (e.g., air, hydraulic oil, etc) to the actuator 104 and a terminal end 128 for heater and/or thermocouple leads of the inlet component described below.

Fig. 2 shows a cross-sectional view of the injection molding nozzle assembly 100. As can be seen, the actuator 104 further includes a piston 202 slidably disposed within the cy...