Product Overview
This 1×1 cavity curved plastic part injection mold is custom-manufactured specially for PA66 curved headset/clip molding, adopting mature submarine gate + large sprue feeding structure to resolve PA66 high shrinkage and fast cooling molding defects. The core and cavity are processed from premium 1.2083 pre-hardened stainless mold steel, which balances polish performance, anti-rust property and long-term dimensional stability for continuous PA66 mass production.
As a single-cavity customized injection mold, it focuses on high-precision curved contour control for arc plastic accessories. Optimized runner and cooling layout effectively restrains warpage, sink mark and incomplete filling commonly seen on thin curved PA66 parts, widely used for earphone headband hook, electronic curved buckle and small precision curved structural components.
Core Mold Parameter Table
| Specification Item | Detailed Info |
| Cavity Layout | 1×1 Single Cavity |
| Target Resin | PA66 (Nylon66, unfilled / short glass fiber filled optional) |
| Gate Form | Submarine Hidden Gate |
| Sprue Design | Large Diameter Cold Sprue |
| Mold Core/Cavity Steel | 1.2083 Pre-hardened Stainless Mold Steel |
| Molded Product | Custom Curved Plastic Parts |
| Production Mode | Semi-automatic & automatic trial + small-batch formal production |
![Plastic Curved Molding]( "Plastic Curved Molding")
Core Mold Design Advantages
1. 1×1 Single Cavity for Precision R&D & Small Batch
Single-cavity structure lowers initial mold cost, convenient for frequent sample modification and prototype verification, ideal for new curved PA66 part development and small-volume customized orders.
2. Submarine Hidden Gate for Curved Component
Submarine gate is concealed on product inner surface, no obvious gate residue on curved outer appearance, eliminating post gate cutting work and avoiding scratch damage on finished curved arc surface.
3. Large Sprue Optimized for PA66 Molding
PA66 features big molding shrinkage and rapid cooling speed; large sprue reserves excess molten plastic to supply stable packing pressure, compensates material shrinkage, removes shrinkage pits and hollow defects on curved thick-wall sections.
4. 1.2083 Stainless Mold Steel Merits
1.2083 pre-hardened steel comes with inherent anti-corrosion capability, prevents cavity rust caused by damp PA66 raw material; fine grain structure supports customizable VDI/SPI surface finish, keeps curved cavity contour precision under long cycle molding.
5. Curved Contour Dedicated Cooling Layout
Cooling channel follows the part’s arched curved outline for uniform heat dissipation, reduces internal residual stress and restricts curved part bending deformation after ejection.
Application Scope
PA66 curved headphone headband hooks, wearable device plastic clips, automotive small curved fasteners, electronic equipment curved fixing brackets and consumer electronics precision curved accessories.
FAQ
Q1: What’s the advantage of submarine gate on curved PA66 mold?
A1: Submarine gate cuts into part inner wall automatically, no gate burr on curved outer surface, saves manual trimming and ensures perfect appearance of arc-shaped finished pieces.
Q2: Why match large sprue for PA66 molding?
A2: Large sprue stores extra melt material to maintain holding pressure, offsets PA66 high shrinkage and avoids sink mark & void on curved part’s thick positions.
Q3: What is the characteristic of 1.2083 mold steel?
A3: 1.2083 is stainless pre-hardened steel with outstanding rust-proof and polishing performance, well adapted to moisture-prone PA66 processing and long-term mold precision retention.
Q4: Can we upgrade this mold to multi-cavity later for mass production?
A4: Yes, we can redesign the mold base to 1×2 /1×4 cavity layout based on your growing order quantity after sample confirmation.
Q5: Does this mold work for glass-filled PA66?
A5: Standard 1.2083 suits unfilled PA66; we will increase mold surface hardness or switch higher abrasion-resistant steel if you adopt GF filled PA66 material.
