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This production tooling specification outlines the engineering and structural framework for the Grundträger Hi Mi(Rear Center Console Support/Main Bracket).The mold is configured as a 2-cavity layout optimized for high-volume automotive structural component manufacturing.The design prioritizes dimensional stability,balanced material flow,and simplified field maintenance compliance with global automotive engineering standards.
Parameter | Specification |
Product Name | Grundträger Hi Mi (Main Support / Bracket) |
Plastic Material | PP/EPDM TV20 (Talc-Filled Polypropylene Elastomer) |
Cavity Count | 2 Cavities |
Core &Cavity Steel | XPM Premium Steel (Pre-Hardened HRC 38-42) |
Component Standard | HASCO Standard Components |
Mold Classification | Automotive Interior Structural Tooling |
The core and cavity inserts utilize XPM pre-hardened mold steel,supplied at HRC 38-42.XPM steel deliversuniform hardness through large cross-sections,exceptional thermal conductivity,and superior toughness compared to conventional P20/718H steels.This hardness range provides the optimal balance between wear resistance against talc-filled polymers and structural ductility,eliminating the risks of stress cracking or prematuretool degradation without requiring post-machining heat treatment.
The molding resin,PP/EPDM TV20,is an impact-modified polypropylene reinforced with 20%talc filler.Thismaterial is highly specified for automotive structural interiors due to its balance of rigidity and impact absorption.However,the introduction of EPDM introduces anisotropic shrinkage tendencies.The 2-cavity layout incorporates
a balanced gating system to regulate localized injection pressure,minimize knit lines,and counteract potential part warpage across large flat spans.
All functional tooling components—including guiding elements,centering units,ejector assemblies,and cooling line connectors—adhere strictly to HASCO specifications.This full standardization ensures precise tool-building tolerances,simplifies maintenance,and enables global manufacturing facilities to procure identical replacement components directly from catalog specifications,eliminating custom-machined replacement lead times.
Q:What are the primary advantages of selecting XPM steel over H13 for the Grundträger Hi Mi tool?
A:The Grundträger Hi Mi is a larger structural bracket molded from PP/EPDM TV20,which is less abrasive than highly filled technical resins.XPM steel delivered at HRC 38-42 provides excellent dimensional stability and impact toughness for large tools without the risks of distortion associated with through-hardening heat treatments like H13 requires.It also offers superior machinability and uniform core hardness throughout thick-walled blocks.
Q:How does the 20%talc content(TV20)impact the tool design?
A:While the 20%talc filler enhances the part's stiffness and reduces overall volumetric shrinkage,it increases the viscosity of the melt and induces mild tool abrasion at high-shear areas like gates.The tool design uses widened runner cross-sections and hardened XPM steel inserts to minimize localized erosion and ensure stable long-term parting line sealing.
Q:Why is HASCO standard specified for this project instead of alternative component standards?
A:HASCO is the leading standard for European automotive tool manufacturing.Specifying HASCO standardizes all alignment components,cooling fitments,and ejection pins,ensuring the mold can seamlessly integrate into OEM production facilities worldwide with immediate access to interchangeable off-the-shelf spare parts.