English
ZHONGYUE MOULD is a professional Chinese injection mold manufacturer supplying Automotive Door Panel Moulds / Plastic Car Door Trim Panel Injection Molds (Inner Door Board Molds) to global Tier-1 auto parts suppliers and OEMs. The door panel integrates armrest, map pocket (storage bin), speaker ring, switch bezel mounting, and multiple snap-fit clip bosses — most are molded in PP+EPDM-Talc (PP-T20/T30) with the visible A-surface VDI-grained (matte leather texture), and optional piano-black or chrome-look decorative inserts (ABS/PC+ABS) molded separately or as a two-shot/overmold. Our door panel molds feature sequential valve gate (SVG) hot runner systems (6–10 drops) to eliminate weld lines on the grained face, multiple hydraulic lifters/angled ejector blocks for map pocket undercuts, nitrogen-spring-assisted ejection, and zoned cooling for warp control on 700–1100mm span panels.
From front door trim panels (L/R), rear door trim panels, to separate armrest/map-pocket insert molds, we provide full DFM review and Moldflow simulation before steel cutting.
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Item |
Specification / Options |
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Mold Name |
Automotive Door Panel (Front / Rear) / Door Trim Inner Board Injection Mould |
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Cavity & Core Steel |
Cavity: 718H (HRC 33–38) or 2738HH; S136 (HRC 48–52) mirror insert for piano black; Core: 718H / P20; Lifters/Slides: H13(2344 ESR) nitrided or SKD61 |
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Mold Base |
LKM / DME / HASCO oversized base (mold size typically 1500–2200 × 800–1200 × 900–1300mm; weight 8–18T) |
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Cavities |
Single cavity (1×1) standard; 1+1 mirror cavity (L+R) available for symmetric designs |
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Runner System |
Hot runner — 6–10 drops sequential valve gate (YUDO / SYNVENTIVE / Mold-Master recommended); cold runner for prototype |
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Gate Type |
Submarine gate on inner rib/back flange; hot drop direct gating to hidden zone |
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Ejection |
Ejector pins + multiple lifters (some hydraulic) + angled ejector block / stripper bar; nitrogen spring assist on heavy lifters |
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Cooling |
Baffles Ø8–12mm, bubblers, BeCu inserts near bosses & map pocket corners, 4–6 isolated circuits w/ quick couplings |
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Slides / Lifters |
4–8+ hydraulic or angled-pin lifters for map pocket & armrest undercut; mini slides for switch-bezel recess; airbag-less (door panel typically no airbag) |
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Surface Finish |
Cavity VDI 27–36 matte grain / MT texture; S136 zone SPI A1/A2 mirror polish; logo/part number via changeable insert |
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Mold Life |
≥500,000 shots (718H cavity + H13 nitrided lifters); ≥800,000 shots (full H13/S136 nitrided) |
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Recommended Molding Material |
PP-T20/T30 (shrinkage ~0.8–1.5%), PP+EPDM-T20, ABS/PC+ABS for décor inserts, TPE/TPO for overmolding (2K mold) |
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Design Software |
UG NX, CATIA, Pro/E, SolidWorks, Moldflow |
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Tolerance Control |
±0.05 mm general; ±0.1 mm on clip boss pitch; contour ±0.3–0.5 mm to match door outer panel & A/B pillar |
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Lead Time |
55–75 days after 3D mold design approval (multi-lifter complexity) |
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Mould material |
Hardness |
Mould life |
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P20 |
HRC 28-33 |
>300,000 shots |
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718 |
HRC 33-36 |
>500,000 shots |
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H13 |
HRC >43 |
>800,000 shots |
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2344 |
HRC >48 |
>800,000 shots |
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S136 |
HRC 48-52 |
>1,000,000 shots |
Make your nextAutomotive Door Panel Mould project brighten!
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Part Type |
Common Material |
Mold Design Focus |
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Front Door Trim Panel (Inner Board / Main Substrate) |
PP-T20/T30 (Talc-filled), PP+EPDM-T20 |
Large thin-wall (2.5–3.5mm), SVG hot runner, 4–8+ lifters for map pocket & armrest undercut, VDI 27–36 grain on A-surface |
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Rear Door Trim Panel (Often Smaller / Simpler) |
PP-T20/T30 |
Same structure as front but smaller; can share same mold base design philosophy; sometimes 1+1 L+R if asymmetrical |
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Door Map Pocket / Storage Bin (Separate or Integrated) |
PP-T20, ABS |
Deep undercut → stripper plate / angled lifters; sometimes molded as separate insert piece then assembled |
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Door Armrest / Switch Bezel / Speaker Grille (Sub-assembly) |
ABS, PC+ABS (piano black or matte) |
S136 mirror-polish zone for high gloss; small slides for bezel cutouts; sometimes 2K overmolding with soft TPE |
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Soft-Touch Overmolded Door Panel Substrate (2K) |
PP substrate + TPE/TPO soft pad |
Mold designed for rotary platen or sequential injection; registered shut-off for soft material zone |
Sequential Valve Gate (SVG) Hot Runner — YUDO / SYNVENTIVE / Mold-Master — 6–10 drops with staged open/close to push weld lines to the hidden back flange/inner rib, preserving the grained A-surface appearance.
Multiple Hydraulic Lifters & Angled Ejector Blocks — 4–8+ lifters for map pocket inner undercut & armrest recess; nitrogen springs on large lifters to prevent fatigue; mini hydraulic cylinders for switch-bezel cutouts if needed.
Shrinkage Compensation for PP-Talc & ABS/PC+ABS — PP-T20 shrinkage ~0.8–1.3%(MD)/1.0–1.5%(TD); ABS ~0.4–0.7%; Moldflow-verified cavity sizing especially on wide panels to control warp & gap to door shell/A-pillar.
Matte Grain + Optional Piano-Black / Chrome Insert Zone — Cavity VDI 27–36 leather/matte grain (Mold-Tech / YS) directly etched on 718H/2738HH; S136 (HRC 48–52) mirror-polish insert for high-gloss decorative strip — clearly partitioned parting line.
Zoned Deep Cooling for Warp Control — Baffle Ø8–12mm + bubbler + BeCu inserts near thick clip bosses & armrest mounting; 4–6 isolated water circuits (ΔT ≤ 3–4℃) across left/center/right zones.
1+1 Mirror Cavity Option (L+R for Symmetrical Door Panels) — Balanced hot runner or Y-branched cold runner; for asymmetrical styled panels usually single cavity (L & R quoted as matched pair).
Hidden Submarine Gate on Back Face / Inner Rib — Gate vestige completely hidden from A-surface; cold runner rare except for proto — hot drop preferred.
Project Kick-off & DFM Review — Analyze wall thickness (2.5–3.5mm typ.), draft angle per grain (≥1.5° for VDI 30+), lifter stroke interference for map pocket & armrest, gate & ejection feasibility; suggest improvements for sink/weld line avoidance on A-surface.
Mold Flow Simulation (Moldflow) — Fill pattern, weld line position (pushed to back/flange), clamp force, cooling uniformity & predicted warp magnitude for wide PP-Talc panel.
3D Mold Design Approval — Full assembly with cooling layout (zoned circuits), SVG hot runner balancing, 4–8+ lifter/slide detail with interference animation, texture & mirror-polish zone definition.
Precision Machining — Large-format high-speed CNC rough/finish, deep-hole drilling for cooling, Sodick/Charmilles EDM for fine lifter slots & texture engraving; S136 mirror polish & VDI grain etching.
T1 Trial & Correction — Run on in-house machine; supply trial video + CMM dimensional report + sample part for approval; check map pocket fit & clip engagement.
Final Packaging & Shipment — Fumigation-free heavy-duty case, mold operation manual, spare parts list (lifter springs, ejector pins, seals), heat treatment & steel certs.
Automotive Interior Mold Experience — Door Panel, fender, Door Panel, center console & door panel molds built in-house with large-format 5-axis CNC & deep-hole drill
In-house DFM & Moldflow Report — Identify filling/warp/sink risks & optimize before steel cutting; verify gap/flush to door shell & pillar
SVG Hot Runner & Multi-Lifter Expertise — YUDO/SYNVENTIVE/Mold-Master integration; nitrogen-spring lifters; angled ejector block design
Strict QC & Transparent Progress — Weekly machining photos, CMM inspection, T1 sample approval before shipment
Export Experience — Molds shipped to Europe, North America, South America, Southeast Asia
1-Year Mold Warranty + Spare Parts Supply (lifter springs, seals, pins)
Q: Do you make both front and rear door panel molds — and can left & right be 1+1 mirror cavity?
A: Yes. We design single-cavity L/R molds (common for asymmetrical styled panels) and 1+1 mirror cavity molds for symmetrical designs to double output per shot. Front & rear are quoted separately as they differ in size & feature set.
Q: What hot runner system do you recommend for door panel molds?
A: Sequential valve gate (SVG) hot runner with 6–10 drops (YUDO/SYNVENTIVE/Mold-Master) is strongly recommended — it lets you stage filling to push weld lines to non-visible areas, critical for grained A-surface quality.
Q: Can you achieve matte grain AND piano-black high gloss in one mold?
A: Yes. We use S136 mirror-polish insert (SPI A1/A2) for high-gloss decorative zone and 718H/2738HH textured cavity (VDI 27–36) for matte main panel, with clearly defined parting between zones.
Q: What do you need for a quotation?
A: 3D part model (STP/IGS/X_T), target material (PP-T20/T30 / ABS etc.), annual volume / cavitation preference (1×1 or 1+1), your injection machine platen data, surface texture & high-gloss zone spec if any.
Send your door panel 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.
Driven by the philosophy:
Zhongyue Mould is a leading company in the plastic injection air conditioner Cover mould industry. Our highly experienced team of engineers and designers have many decades of combined experience in plastic air conditioner Cover mould design and manufacturing. We provide a comprehensive service, specializing in the production of high-quality and high-precision air conditioner Cover moulds. We have also assisted numerous customers in customizing various types of plastic air conditioner Cover moulding lines.
We can also offer comprehensive assistance in the management of your production process. The procurement department will purchase high-quality raw materials, while the technical department will select the appropriate plastic formula. In accordance with the parameters of the plastic air conditioner Cover mould life requirements and market positioning, we will select the most suitable plastic air conditioner Cover parameters, structure, etc. Our extensive production capacity allows us to deliver plastic air conditioner Covers promptly, at competitive prices and with guaranteed quality.
Address
No.38, Kaituo Road Xinqian Street, Huangyan Taizhou City, Zhejiang Province, China
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