Product Overview
This is a high-efficiency custom injection mold purpose-built for mass production of TPE (Thermoplastic Elastomer) housing shell parts. Featuring a balanced 1×2 cavity configuration, large side gate system, premium 2344 hot-work mold steel hardened to HRC48-52, and SPI-B2 fine matte mold texture, this tooling is engineered for the flexibility, soft-touch feel, and consistent dimensional stability required by TPE components in consumer electronics, automotive, and household appliance applications.
Key Features
✅ 1×2 Cavity Balanced Design for High Efficiency
The 1×2 cavity layout produces two identical housing shells per cycle, doubling production output while maintaining perfectly balanced melt flow and uniform pressure distribution across both cavities. This symmetrical design eliminates quality variation between parts, shortens cycle times, and is ideal for medium-to-high volume TPE housing shell production.
✅ Large Side Gate System Optimized for TPE
A precision-designed large side gate system is strategically positioned on the housing shell’s non-critical edge. This gate design is perfectly suited for TPE’s high elasticity and low melt viscosity:
Ensures smooth, complete filling of the part’s thin walls and complex geometry
Reduces shear stress and prevents material degradation
Allows for clean, easy trimming of the gate vestige, leaving no unsightly marks on visible surfaces
Eliminates the risk of gate stringing or sticking, common issues with TPE materials
✅ 2344 HRC48-52 Mold Steel Construction
Constructed from high-grade 2344 (1.2344) hot-work tool steel, hardened and tempered to HRC48-52, this mold offers exceptional durability:
High hardness provides excellent wear resistance, even with repeated cycles of TPE injection
Outstanding toughness prevents cracking under repeated clamping and injection pressure
Excellent thermal stability maintains consistent mold temperatures, preventing part warpage or dimensional shift
Long service life of ≥1,000,000 cycles with proper maintenance
✅ SPI-B2 Fine Matte Mold Texture
The mold cavities are precision-finished to SPI-B2 standard (fine matte texture, Ra 1.6–3.2 μm):
Enhances the soft-touch, grippy feel of the final TPE housing shell
Improves mold release, preventing the elastic TPE part from sticking to the cavity
Hides minor surface imperfections and flow marks common with TPE materials
Delivers a uniform, professional matte appearance ideal for consumer-facing products
✅ TPE-Specialized Cooling & Venting System
Optimized cooling channels are positioned close to the housing shell’s walls to ensure uniform cooling, preventing uneven shrinkage or warpage.
Precision venting at the parting line and gate areas effectively discharges trapped air, eliminating burn marks or incomplete filling.
The mold design accommodates TPE’s low-temperature processing requirements, preventing overheating and material degradation.
Technical Specifications
| Parameter | Details |
| Mold Type | Custom Injection Mold for TPE Housing Shell |
| Cavity Configuration | 1×2 Cavity (2 parts per cycle) |
| Compatible Material | TPE (Thermoplastic Elastomer, including soft/medium-hardness grades) |
| Gate System | Large Side Gate |
| Mold Steel | 2344 (1.2344) Hot-Work Steel, Hardened HRC48-52 |
| Cavity Finish | SPI-B2 Fine Matte Texture |
| Mold Base | S50C Carbon Steel, HRC28-32 |
| Mold Life | ≥1,000,000 cycles (with proper maintenance) |
| Application | Electronic device grips, automotive soft-touch trim, household appliance housings, power tool handles |
![Housing Shell Part Injection Mould]( "Housing Shell Part Injection Mould")
FAQ
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Q: Why use TPE for housing shells?
A: TPE offers excellent elasticity, soft-touch feel, and slip resistance, making it ideal for comfortable, ergonomic housing shells that require grip and durability.
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Q: Why a large side gate for TPE?
A: A large side gate ensures smooth, low-stress filling of the elastic TPE material, preventing material degradation and allowing for clean trimming of the gate vestige.
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Q: Why 2344 HRC48-52 steel?
A: High hardness and toughness provide excellent wear resistance and long mold life, even with the repeated injection cycles required for TPE production.
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Q: What does SPI-B2 texture do for the TPE part?
A: The fine matte finish enhances the soft-touch feel, improves mold release, and hides minor surface imperfections common with TPE materials.
