Porous Mold Insert Venting for Polymer Grille Surface Quality
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Solution Overview
Problem
Existing mold insert designs face challenges in effectively venting accumulated gases during the polymer grille formation process without altering the product design or causing clogging.
Innovation Solution
A mold insert system utilizing porous materials, inverted funnel vents, and vent channels to efficiently vent gases, eliminating the need for vent apertures in the forming portion, and incorporating conformal or traditional cooling waterlines for uniform cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vent apertures are placed in the forming portion of the mold insert, then gas venting is improved, but product design is altered and blemishes are caused
Solution Approach 1:
The venting function is extracted from the forming portion by placing porous material in the base layer, separating the gas venting function from the product-forming function to avoid surface blemishes
Solution Approach 2:
A middle layer with vent channels acts as an intermediary, providing a pathway for gas to travel from the base layer porous material to the ejector side without passing through the forming portion
2Reliability
If porous material is used in the base layer for gas venting, then gas accumulation is reduced, but clogging may occur in the vent channels
Solution Approach 1:
The vent channel is inverted with the wide opening facing the porous material and the narrow end toward the ejector side, preventing clogging by allowing gas to flow from the wider to narrower section while blocking debris from entering
Solution Approach 2:
Porous material is placed in the base layer to provide numerous small pathways for gas to reach the vent channels, increasing venting effectiveness while the inverted funnel shape prevents these pathways from clogging
3Reliability
If the mold insert is constructed with multiple layers and materials, then gas venting and cooling are improved, but manufacturing complexity increases
Solution Approach 1:
The mold insert is segmented into three functional layers (forming portion, middle layer with vent channels, base layer with porous material and cooling channels), allowing each layer to be optimized for its specific function while working together as a unified system
Solution Approach 2:
The middle layer serves multiple functions by containing both the inverted funnel vent channels for gas venting and conformal cooling waterlines for uniform cooling, reducing the need for separate components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively vents gases, preventing blemishes and clogging while ensuring uniform cooling and efficient production of polymer grilles.
Implementation Method 1
The porous steel allows for the venting of gas which accumulates during the formation process
Implementation Method 2
The conformal cooling waterlines assist in the cooling and forming of the polymer grille in a uniform manner
Data Source
AI summary
The present invention is directed to the design and production of a venting system contained in mold inserts for polymer grille formation, as well as a method for venting gas entrapment in any molding device. During the forming process of polymer grilles or any injection molded product, gas accumulates in the mold which needs to be vented out in a safe and effective manner. Venting out the gas without imposing alterations or blemishes on the product becomes a challenge. The present invention provides a solution to this issue through the use of porous material in the forming portion which allows the gas to escape from the mold without the use of vent apertures placed in the forming portion of the mold insert.