Automotive Trims Mould

ZHONGYUE MOULD manufactures custom automotive trims moulds for pillar, window, and scuff trims in ABS or PP. Features include multi-cavity design, optional hot or cold runner, and full DFM support. As a China exporter of car interior and exterior trim molds, we invite you to request your quote now.

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Product Description

Automotive Trims Mould – Custom Car Interior & Exterior Trim Strip / Pillar Garnish Injection Mold Manufacturer

ZHONGYUE MOULD is a professional Chinese injection mold manufacturer supplying Automotive Trims Moulds / Plastic Car Interior & Exterior Trim Strip Molds (including A/B/C Pillar Garnish, Window Surround Trim, Scuff Plate / Kick Plate, Roof Rail Trim, and Dashboard Accent Strips) to global Tier-1 auto parts suppliers and OEMs. Automotive trims are typically molded in PP-T20/Talc, ABS (matte grain or chrome-plated), PC+ABS, or TPO (exterior black trim), with either VDI 27–36 leather matte grain on the visible A-surface or mirror-polish S136 cavity for chrome-plated parts. Our trim molds commonly feature multi-cavity (1+1, 2+2, up to 4 cavities) for high-efficiency production of symmetrical left/right parts, hidden submarine gates on the back face, small hydraulic or angled-pin slides for clip recesses and mounting tab undercuts, and precise shrink compensation for PP or ABS.

From A/B/C pillar garnish trims, window waist-line & door belt molding, scuff plates / kick plates, to exterior chrome-look bright trim surrounds (grille/headlamp accent strips), we provide full DFM review and Moldflow simulation before steel cutting.

Specifications :

Item	Specification / Options
Mold Name	Automotive Trim Strip Mould (Pillar Garnish / Window Trim / Scuff Plate / Bright Accent Strip)
Cavity & Core Steel	Cavity: 718H (HRC 33–38) or 2738HH for grain; S136 (HRC 48–52) mirror insert for chrome strip; Core: 718H / P20; Slides/Lifters: H13 nitrided or SKD61
Mold Base	LKM / DME / HASCO / Self-designed (typically 350×400mm – 700×850mm; weight 0.8–3.5T)
Cavities	1×1 (asymmetric), 1+1 L+R (common), 2+2, up to 4 cavities for small trim strips
Runner System	Cold runner (sub/edge, Y-branch balanced) standard; Hot runner open drop optional for single-cavity chrome strip
Gate Type	Submarine (latent) gate on inner flange / back face; fan gate; hot drop direct gating where applicable
Ejection	Ejector pins + small angled lifters / mini slides; sometimes early-eject for deep clip recess
Cooling	Baffles Ø6–10mm, bubblers, BeCu inserts near bosses, isolated circuits
Slides / Lifters	Angled-pin lifters or mini hydraulic cylinders for clip recess & screw-tab undercut
Surface Finish	Cavity VDI 27–36 matte grain / MT texture; S136 zone SPI A1/A2 mirror polish for chrome plate; logo engraving insert
Mold Life	≥500,000 shots (718H); ≥300,000 shots (P20 core/proto); ≥800,000–1,000,000 shots (S136/H13 nitrided)
Recommended Molding Material	PP-T20/Talc (~0.8–1.5% shrink), ABS (shrink ~0.4–0.7%), PC+ABS, TPO (exterior black), plating-grade ABS (chrome)
Design Software	UG NX, CATIA, Pro/E, SolidWorks, Moldflow
Tolerance Control	±0.05 mm general; ±0.1 mm on clip pitch; length-wise bow ≤0.3–0.5 mm per 500mm (PP-Talc)
Lead Time	30–50 days after 3D mold design approval (depends on cavity count & S136 polish)
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 nextAutomotive Trims Mould project brighten!

Typical Automotive Trim Parts We Tool

Part Type	Common Material	Mold Design Focus
A / B / C Pillar Garnish (Interior Trim)	PP-T20/Talc, ABS matte grain, sometimes fabric-laminated	1+1 L+R cavity common; VDI 27–36 grain on A-surface; clip boss lifter/slide; hidden sub-gate
Window Surround / Waist-Line Trim (Exterior Black TPO or Chrome-look ABS)	TPO (black matte) or ABS (chrome-plated)	Exterior TPO→VDI grain; Chrome ABS→S136 mirror polish SPI A1/A2; tight parting line control
Scuff Plate / Kick Plate (Door Sill Trim)	ABS with aluminum-look foil or TPE insert, PP+EPDM	Wear-resistant thick section cooling; sometimes insert molding prep; 1+1 or 2-cavity
Headlamp / Tail Lamp / Grille Bright Accent Strip (Exterior Chrome Trim)	Plating-grade ABS	S136 mirror-polish cavity (SPI A1); minimal witness line; often single cavity or family with small parts
Roof Rail / Windshield Surround Trim (Exterior)	TPO, PP+EPDM-T20 (black textured)	Longer thin strip — uniform cooling to prevent bow; VDI 30–42 grain; 1+1 L+R common

Key Mold Engineering Highlights for Automotive Trim Molds

Multi-Cavity for Symmetrical Trim Parts (1+1, 2+2, 4 Cavities) — Left & Right pillar trims or scuff plates often identical → balanced runner (cold Y-branch or shared hot drop) to equalize fill time & clamp force per cavity.

Dual Surface Finish — Matte Grain OR Mirror Polish — Interior matte: 718H/2738HH cavity VDI 27–36 (Mold-Tech / YS) directly etched; Chrome/stainless bright: S136 (HRC 48–52) mirror polish SPI A1/A2 with changeable logo insert.

Shrinkage Compensation for PP-Talc & 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 long slender strips prone to bow.

Clip Boss / Undercut Handling — Small angled-pin lifters or mini hydraulic slides for snap-fit clip recesses & screw-tab undercuts; ejector pins positioned to avoid marking visible A-surface.

Hidden Submarine Gate on Back / Inner Flange — Gate vestige completely hidden; cold runner standard for multi-cavity trim molds; open hot drop (single cavity chrome strip) optional.

Uniform Cooling for Long Thin Strips — Baffle + bubbler along cavity length; BeCu insert near thick mounting boss; multi-zone temp control to minimize bowing/warp on PP-Talc strips.

Our Mold Manufacturing & Validation Process

Project Kick-off & DFM Review — Analyze wall thickness (2.0–3.0mm typ.), draft angle per grain (≥1.5° for VDI 30+), lifter/stroke for clip undercut, gate & ejection feasibility; suggest multi-cavity layout if L/R symmetrical.

Mold Flow Simulation (Moldflow) — Fill pattern, weld line position (pushed to hidden flange/back), clamp force, cooling uniformity & predicted bow/warp for long strip parts.

3D Mold Design Approval — Full assembly with runner balancing (for multi-cavity), lifter/slide detail, texture zone & mirror-polish zone definition, venting strategy.

Precision Machining — High-speed CNC rough/finish, deep-hole drilling for cooling, EDM for fine clip recess & texture engraving; S136 mirror polish & VDI grain etching.

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

Final Packaging & Shipment — Fumigation-free case, mold operation manual, spare parts list (lifter springs, ejector pins), heat treatment & steel certs.

Why Choose ZHONGYUE MOULD for Your Automotive Trims Mould?

Automotive Interior & Exterior Mold Experience — Bumper, fender, door panel, pillar trim & bright strip molds built in-house

In-house DFM & Moldflow Report — Identify filling/warp/bow risks & optimize before steel cutting; advise multi-cavity layout for cost efficiency

Multi-Cavity & Dual-Finish Capability — 1+1 / 2+2 layout; S136 mirror-polish + textured 718H cavity in same program; chrome-strip mold expertise

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)

Frequently Asked Questions

Q: Can you make both Left and Right trims in one mold (1+1 cavity)?

A: Yes. Most symmetrical pillar garnish, scuff plates, and window belt trims are run in 1+1 L+R cavity molds to double output per shot. Asymmetric styled trims are quoted as separate single-cavity molds (L & R as matched pair).

Q: Do you support mirror-polish for chrome-plated trim strips and matte grain for interior trims?

A: Yes. We use S136 mirror-polish (SPI A1/A2) for chrome-plate strips and 718H/2738HH VDI 27–36 grain cavity for matte interior trims — with changeable logo insert.

Q: What runner system do you recommend for trim molds?

A: Cold runner with balanced Y-branch (for multi-cavity) is most common and cost-effective. For single-cavity high-appearance chrome strips we can integrate an open hot drop (YUDO/SYNVENTIVE/Mold-Master) to eliminate weld lines on narrow visible face.

Q: What do you need for a quotation?

A: 3D part model (STP/IGS/X_T), target material (PP-T20 / ABS / TPO / plating-grade ABS etc.), annual volume / cavitation preference (1×1, 1+1, 2+2), your injection machine platen data, surface texture & chrome-plate requirement if any.

Request a Quote for Your Automotive Trims Mould

Send your trim part 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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