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Valve pin guiding tip for a nozzle

A nozzle head and nozzle technology, which is applied in the field of valve pin guides for nozzles, can solve problems such as misalignment of valve pins and gates, misalignment of melt channel outlets, etc.

Active Publication Date: 2009-09-23
标准模具(2007)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such devices, the melt channel outlets may be misaligned due to the cumulative effect of the tolerances of the individual components
Additionally, there may be manufacturing inaccuracies in the part, which can cause misalignment between the valve pin and the gate

Method used

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  • Valve pin guiding tip for a nozzle
  • Valve pin guiding tip for a nozzle
  • Valve pin guiding tip for a nozzle

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0040] This application is a continuation-in-part of U.S. Application No. 10 / 369,564, filed February 21, 2003, the disclosure of which is published in Patent Application Publication No. 2003 / 0170340 and is incorporated herein by reference in its entirety middle.

[0041] see now figure 1 , the injection molding apparatus is indicated generally by reference numeral 10 . Injection molding apparatus 10 includes a manifold 12 having manifold channels 14 for receiving a molten flow of molding material through a sprue bushing 16 . Melt is delivered from the machine nozzle (not shown) into the sprue bushing 16 . Manifold 12 is spaced between backing plate 28 and die plate 26 by first and second retaining rings 30 and 32, respectively.

[0042] A plurality of nozzles 18 having nozzle passages 19 therethrough are coupled to the manifold 12 , wherein the nozzle passages 19 are in fluid communication with the manifold passages 14 . A first axis (not shown) passes through the center o...

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PUM

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Abstract

An injection molding apparatus includes a manifold and a nozzle, the nozzle is received in an opening of a die plate and includes a nozzle channel for receiving a flow of melt from the manifold channel, the nozzle channel is aligned with a first axis. A nozzle tip is received in the downstream end of the nozzle. The nozzle tip includes a melt channel for receiving a flow of melt from the nozzle channel of the nozzle. A pin guide portion is provided at the downstream end of the nozzle tip and includes an outwardly extending flange having a perimeter that abuts against the inner wall of the opening to align the melt passage with the second axis through the gate. A valve pin moves through the melt channel to selectively open the gate. Wherein the nozzle tip is flexible in order to compensate for misalignment between the first axis and the second axis.

Description

technical field [0001] The present invention relates generally to injection molding apparatus, and more particularly to valve pin guides for nozzles. Background technique [0002] In injection molding devices where the valve pin reciprocates through the nozzle to open and close the gate, proper alignment of the valve pin is necessary in order to produce high quality molded parts. Improper valve pin alignment often results in leaks at the gate, which can cause blemishes around the gate area of ​​the molded part. In addition, incorrect valve pin alignment may result in damage or premature wear to the valve pin and / or gate. Such damage requires frequent repair or replacement of expensive valve pin and / or gate components. [0003] Prior art solutions for improving valve pin alignment typically include a guide positioned towards the downstream end of the nozzle melt channel to hold and align the free end of the valve pin. Because the melt needs to flow through the guide when t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/03B29C45/20B29C45/27B29C45/17B29C45/28
CPCB29C2045/2798B29C2045/2766B29C2045/2889B29C45/2806B29C45/278B29C2045/2787
Inventor D·巴宾
Owner 标准模具(2007)有限公司