Product Overview
This high-performance 1×4 multi-cavity injection mold is purpose-built for manufacturing precision PC plastic buckles and sleeves. Crafted from premium 1.2344HHM hot work tool steel, it features a dual edge gate + tunnel gate system and fully polished cavity and core surfaces. Optimized for high-volume production, this mold delivers rigid, dimensionally accurate, and aesthetically consistent plastic fasteners and connectors, ideal for demanding applications in automotive, electronics, and consumer goods.
The semi-transparent plastic buckles shown in the image—with complex internal locking structures—are typical examples of parts produced by this mold, showcasing its ability to replicate intricate geometries with precision.
Key Features
✅ 1×4 Multi-Cavity Design
A balanced 1×4 cavity layout ensures uniform material flow, consistent quality, and high production efficiency. This configuration maximizes throughput, reducing unit costs for large-scale manufacturing of plastic buckles and sleeves.
✅ Dual Gate System: Edge Gate + Tunnel Gate
Tunnel gate: Enables automatic gate break during ejection, eliminating manual trimming and leaving no visible marks on the finished part—critical for maintaining the clean appearance of buckles and sleeves.
Edge gate: Provides stable, controlled filling for complex geometries, ensuring complete material flow into thin walls, internal slots, and locking structures.
✅ 1.2344HHM Hot Work Tool Steel Construction
High-grade 1.2344HHM steel offers exceptional durability:
High heat and wear resistance, ideal for continuous PC molding.
Excellent toughness and dimensional stability under high injection pressures.
Long mold life (500,000+ shots) with consistent performance.
✅ Fully Polished Mold & Core
Both cavity and core are precision polished to eliminate flow lines, sink marks, and blemishes. This ensures smooth ejection, prevents damage to delicate internal structures, and delivers uniform surface finishes, from semi-transparent to high-gloss.
✅ Optimized for PC Material
Tailored for polycarbonate (PC) resin, the mold features optimized cooling channels, venting, and flow paths to reduce internal stress, warpage, and burn marks. It ensures complete filling of intricate features like locking tabs and square holes.
✅ Precision Functional Design
Engineered to meet tight tolerances, the mold accurately replicates internal locking teeth, slots, and alignment features. This guarantees secure fit and reliable performance in assembly, with smooth, burr-free edges to prevent jamming.
Technical Specifications
| Item | Specification |
| Mold Type | 1×4 Multi-Cavity Injection Mold |
| Application | Plastic Buckle & Sleeve / Fasteners & Connectors |
| Material | PC (Polycarbonate) |
| Gate System | Edge Gate + Tunnel Gate |
| Mold Steel | 1.2344HHM Hot Work Tool Steel |
| Surface Finish | Polished Cavity & Core |
| Hardness | Pre-hardened (adjustable per requirement) |
| Mold Life | 500,000+ shots |
| Customization | Custom part geometries, sizes, and specifications available |
![Plastic Buckle And Sleeve Injection Molding]( "Plastic Buckle And Sleeve Injection Molding")
Applications
This mold produces PC plastic buckles and sleeves for a wide range of industries:
Automotive interior fasteners and connectors
Consumer electronics assembly clips and housing sleeves
Household appliance plastic fasteners
Industrial equipment locking components
Furniture and hardware assembly parts
The rigid, impact-resistant properties of PC material, combined with the precision of this mold, ensure these fasteners deliver reliable performance in demanding environments.
FAQ
Q1: How about your quality control?
A: We have a professional QC team that strictly controls every stage of mold manufacturing, from material inspection and CNC machining to mold fitting and trial injection. We provide T1 samples for your approval to ensure the final parts meet all dimensional and appearance requirements.
Q2: What's your lead time?
A: For this type of multi-cavity plastic buckle mold, the lead time is about 30–45 working days after receiving the deposit and approved drawings, excluding Chinese official holidays.
Q3: What information do you need to provide a mold quote?
A: To provide an accurate quotation, we need: 3D part files (STEP/IGS), 2D drawings with tolerances, material type (PC), estimated annual volume, and injection machine specifications (tonnage, tie-bar spacing).
Q4: Why choose both edge gate and tunnel gate for this part?
A: The tunnel gate allows automatic gate break with no visible marks on the finished part, while the edge gate ensures stable filling for complex internal structures. This dual system balances clean appearance and complete part filling.
Q5: What is the typical mold life for this 1.2344HHM steel mold?
A: With proper maintenance, the mold life can reach 500,000+ shots. The high wear resistance of 1.2344HHM steel ensures consistent quality even in long production runs.
Q6: Can you adjust the mold for different PC grades or other materials?
A: Yes. We can optimize the mold design for different PC grades (e.g., impact-modified, flame-retardant) or switch to other materials like ABS, PA, or POM with adjustments to gating, cooling, and venting systems.
Q7: What is your process for mold testing and sampling?
A: After mold completion, we conduct T1 trials to produce initial samples. We then review the samples with you, make adjustments if needed, and provide final approved samples before mass production.
