Extrusion Die Tooling Single Body Merging
Solution Overview
Problem
Die tooling for extruding tubular products is expensive to manufacture and assemble, and is vulnerable to damage due to excess pressures, with existing technologies requiring complex spiders to maintain flow and precision.
Innovation Solution
Die tooling with a series of individual passages drilled through a single body member, featuring spaced inlets and converging outlets forming a predetermined pattern, which includes a common blending chamber with restrictors to stabilize internal melt pressure and simplify assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional die tooling with multiple cylindrical components and spiders is used, then flow distribution can be maintained, but manufacturing cost increases and assembly complexity increases
Solution Approach 1:
The patent merges multiple cylindrical components and spiders into a single integrated die tooling body. The die tooling comprises a single body with multiple passages formed directly within it, eliminating the need for separate cylindrical members and spider connectors. This integration maintains flow distribution functionality while significantly reducing assembly complexity and manufacturing cost.
2Manufacturing precision
If traditional die tooling with multiple cylindrical components is used, then extrusion passages can be defined, but vulnerability to damage from excess pressure increases
Solution Approach 1:
The patent creates a unified die tooling body where all extrusion passages are formed within a single robust structure. This integrated design eliminates the weak interfaces between multiple cylindrical components and spiders, making the die tooling resistant to distortion and damage from excess pressures during operation.
3Manufacturing precision
If spiders are used to interconnect cylindrical components, then component relationship is maintained, but disruption of molten plastic flow occurs
Solution Approach 1:
The patent eliminates spiders entirely by forming all passages directly within a single die tooling body. This removes the physical obstructions that spiders create in the molten plastic flow stream, ensuring smooth, uninterrupted flow while maintaining precise passage geometry through direct formation in the integrated body.
4Manufacturing precision
If multiple cylindrical members with spiders are used, then extrusion passages can be formed, but manufacturing cost increases
Solution Approach 1:
The patent forms all extrusion passages within a single die tooling body using direct formation methods. This eliminates the need to manufacture and assemble multiple cylindrical members and spiders, significantly reducing manufacturing cost while maintaining precise passage geometry through the integrated design.
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 design enhances stability against internal melt pressure, reduces manufacturing costs, and simplifies assembly by using a single body member with defined passages, improving the robustness and efficiency of the extrusion process.
Implementation Method 1
a series of individual passages drilled through a length of the die tooling with spaced inlets to the passages provided at the die head for receiving molten plastic under pressure
Implementation Method 2
The pattern of outlets is further defined by the features according to claim 1, and the outlets open into a common blending chamber which is restricted at one end thereof by a restrictor to form the extrusion outlet
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Die tooling (4) is formed by forming a series of passages (50,52,60,62) extending in the length of the tooling where each passage has a circumference defined within a body member (70) of the tooling (4). Preferably the passages are primarily formed using a drilling procedure. The passages define a predetermined pattern of outlets (54,56) adjacent the extrusion outlet or outlets (22,32). The passages between the inlets and outlets can be formed in a series of connected body members with each passage extending through each body member (70). Die tooling of this design is more robust and cost effective to manufacture.