Automotive Engine Cover Mould

Need a custom Automotive Engine Cover Mould for PA66+GF or PP-GF engine shields? ZHONGYUE MOULD delivers. We integrate valve gate hot runner systems, full DFM, and Moldflow simulation to ensure dimensional stability and warp-free molding. A reliable China exporter of car engine cover injection molds. Send us your quote request now.

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Product Description

Automotive Engine Cover Mould – Custom Plastic Car Engine Shield / Bonnet Cover Injection Mold

ZHONGYUE MOULD is a professional Chinese injection mold manufacturer supplying Automotive Engine Cover Moulds / Plastic Engine Compartment Shields & Decorative Covers to global Tier-1 auto parts suppliers and OEMs. Modern vehicles replace metal engine shrouds with lightweight, heat-resistant plastic engine covers molded in PA66+GF30 (glass fiber reinforced nylon) or PP-T20/T30 (mineral/talc-filled polypropylene) — our molds are engineered for these high-temperature engineering plastics with optimized cooling, sequential valve gate hot runner systems, and precise forming of mounting bosses, snap-fit clips, and sound-dampening rib structures.

Whether you need an upper engine beauty cover, an acoustic engine shield, or an under-hood insulation tray, we provide full DFM review and Moldflow simulation before steel cutting.

Plastic Engine Cover Mould specifications :

Item	Specification / Options
Mold Name	Automotive Engine Cover / Engine Shield Plastic Injection Mould
Cavity & Core Steel	718H (HRC 33–38), 2738HH, optionally H13 nitrided (sliders/boss inserts) or S136 (high-polish zones)
Mold Base	LKM / DME / HASCO / Self-designed large-format base
Cavities	Usually single cavity (1×1); twin cavity possible for small auxiliary covers
Runner System	Hot runner — 3–10 drops sequential valve gate (YUDO / SYNVENTIVE / Mold-Master)
Gate Type	Fan / edge / pinpoint gate on non-visible face; SVG controlled
Ejection	Ejector pins + ejector block / stripper plate; robot take-out interface
Cooling	Baffles Ø8–12mm, bubblers, BeCu inserts, isolated circuits (ΔT inlet-outlet ≤3℃)
Slides / Lifters	Hydraulic cylinder or angled guide pin slides for clip recesses & cutouts
Surface Finish	SPI A/B polish + VDI 27/30/36 texture or custom leather grain
Mold Life	≥500,000 shots (718H); ≥800,000–1,000,000 shots (H13/S136 nitrided)
Recommended Molding Material	PA66+GF25–35%, PP-T20/T30, PPA (high-heat), optional PUR foam-backed
Design Software	UG NX, CATIA, Pro/E, SolidWorks, Moldflow
Tolerance Control	±0.02–0.05 mm (depending on feature)
Lead Time	45–65 days after 3D mold design approval
Mould material	Hardness	Mould life
P20	HRC 28-33	>300,000 shots
718	HRC 33-36	>500,000 shots
H13	HRC >43	>800,000 shots
2344	HRC >48	>800,000 shots
S136	HRC 48-52	>1,000,000 shots

Make your nextPlasticEngine Cover Mould project brighten!

Typical Engine Cover Parts We Tool

Part Type	Function	Mold Design Focus
Upper Engine Beauty / Decorative Cover	Aesthetic engine bay cover with logo emboss, often matte/textured finish	Class-B surface texture, hidden gates, minimal weld lines on visible face
Engine Acoustic / Sound Shield (Top or Bottom)	Noise reduction + minor splash protection	Deep ribs for stiffness, uniform wall, balanced filling to avoid sink on reverse side
Timing Belt / Cam Cover (Plastic)	Seal against oil mist, high temp resistance	Tight flatness tolerance, bolt boss reinforcement, sometimes rubber gasket groove
New Energy Vehicle (EV) Motor / Inverter Cover	Lightweight enclosure, heat dissipation ribs	Optimized cooling channels near thick sections, possible insert molding provision
Auxiliary Under-hood Covers / Heat Shields (Plastic)	Protect components from radiant heat	Material shrinkage comp. for high-GF content, slide/insert for cutouts

Key Mold Engineering Highlights for Engine Cover Molds

Sequential Valve Gate (SVG) Hot Runner — YUDO / SYNVENTIVE / Mold-Master; controls fill sequence to push weld lines to non-visible areas and reduce flow marks on textured surfaces.

Reinforced Plastic Optimization (PA66+GF30 / PP-TD20–30) — Cavity sized with accurate shrinkage compensation (PA66+GF ~0.3–0.6%; PP-TD ~0.8–1.2%); mold hardened for abrasive glass fiber wear on moving parts (slides, ejectors).

Deep & Uniform Cooling Near Ribs / Bosses — Baffle, bubbler, and BeCu inserts close to thick mounting bosses to control warpage and cycle time (typical 45–70s).

Surface Texture Compatibility — Cavity SPI B1/A2 polish with VDI 27–36 leather/matte grain (Mold-Tech, YS pattern) directly etched on cavity; logo engraving / insert available.

Complex Undercuts & Mounting Features — Hydraulic or angled-pin slides for side clip recesses, lifters for internal undercuts, indexed ejector blocks for large flat panels.

Our Mold Manufacturing & Validation Process

Project Kick-off & DFM Review — Check draft, wall thickness uniformity, boss/gusset design, gate & ejection feasibility; suggest improvements to reduce sink/warp.

Mold Flow Simulation (Moldflow) — Predict fill pattern, weld line location, clamp force, cooling uniformity & cycle time for PA66+GF or PP-TD.

3D Mold Design Approval — Full assembly with cooling layout, SVG hot runner balancing, slide/lifter detail, venting strategy.

Precision Machining — High-speed CNC rough/finish, deep-hole drilling for cooling, mirror EDM for fine details & texture engraving.

T1 Trial & Correction — Run on in-house machine; supply trial video + CMM dimensional report + sample parts for approval.

Final Packaging & Shipment — Fumigation-free case, mold operation manual, spare parts list, heat treatment certificate.

Why Choose ZHONGYUE MOULD for Your Automotive Engine Cover Mould?

Automotive Mold Experience — Proven track record in engine cover, bumper, interior & exterior auto molds

Free DFM & Moldflow Report — Identify filling/sink/warp risks before steel cutting

Branded SVG Hot Runner Integration — YUDO / SYNVENTIVE / Mold-Master with tuning support

Strict QC & Transparent Progress — Weekly machining photos, CMM inspection, T1 sample approval

Export-Ready — Molds shipped to Europe, North America, South America, SE Asia

1-Year Mold Warranty + Spare Parts Supply

Frequently Asked Questions

Q: What plastic material do you recommend for engine covers?

A: Most passenger cars use PA66+GF25–35% for high-heat resistance (continuous 120–140℃) and rigidity. More cost-sensitive applications use PP-T20/T30 (talc/mineral-filled). We compensate mold cavity dimensions per material shrinkage.

Q: Can you mold both the engine cover and a matching undertray/shield in the same project?

A: Yes. We commonly design separate molds for upper decorative cover and lower acoustic shield, and can also tool small accessory clips/bezels.

Q: What hot runner system is best for engine cover molds?

A: Sequential valve gate (SVG) hot runner is strongly recommended — it helps control weld lines on textured visible surfaces and allows balanced filling of large thin-wall panels.

Q: What do you need for quotation?

A: 3D part model (STP/IGS/X_T), target material, annual volume / cavitation preference, your injection machine platen data, surface texture spec if any.

Request a Quote for Your Automotive Engine Cover Mould

Send your engine cover 3D model (STEP/IGS/X_T) and project requirements. ZHONGYUE MOULD will provide a free DFM report + mold flow summary + formal quotation within 24–48 working hours.

How we processing the project?

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