
China Custom Plastic Injection Mold Manufacturer Since 2005
ONE STOP SERVICE FROM DESIGN, PROTOTYPE,
TOOLING, INJECTION MOLDING AND SHIPMENT
PRICE: 20% LOWER AND DELIVERY: 15 DAYS LESS

Established in 2005, PIM(Topworks) plastic mold company supplies design of plastics, contract plastic mold making, and custom injection molding service.
Endlessly, Topworks plastic mold manufacturer is dedicated to supplying top quality, tight tolerance contract plastic injection molds.
And now it becomes a key Chinese plastic mould company and contract tooling maker for high-quality plastic injection mold tooling.
Starting from humble beginnings in 2005 with 15 employees in a 500 square meter plant in Huangyan, known as a Chinese mold town with over 3 thousand plastics companies,
Today it has grown to employ 80 staff across locations in both Huangyan and Dongguan, including over 70 professional plastic mold engineers boasting rich mold-making experience.


Best Small to Medium-Sized Business (SMB) and Startup: Topworks is a good option to consider by businesses that need a high level of collaboration, personal service, and one-stop-shop, design to production. The fact that we concentrate on customer service and project management is a major benefit to clients that might not have the large in-house engineering staffs.
Talking to you straight means we can figure out what you need and get it just right. Our goal is to give you the best molds out there, custom-made quick and smart for what you ordered. We’re in it for the long haul – aiming to boost your workflow and keep you crushing it in the marketplace year after year. Teaming up with you means a lot to us and we can’t wait to keep this going strong as trusty partners down the road.


Inquiry More Today
Partner with Topworks today to transform your complex designs into flawless, cutting-edge products through our agile, technology-driven solutions.
Some cases
Multi-Slide & Core-Pulling MoldsHydraulic & Collapsible Cores →
Precision Injection Molds±0.005mm Steel · PEEK / LCP / POM →
Multi-Cavity Cap & Preform Molds8 to 72 Cavities · S136 Steel →
2K Overmolding & Electronics MoldsInsert Molding & UL94 V-0 Housings →
Consumer Appliance MoldsClass-A Cosmetic Enclosures →
Automotive Plastic MoldsBumpers, Doors, Grilles & Trim →
What Our clients say
“I’m glad to inform you that all plastic parts are perfect!!! We are delighted, and therefore there are good chances to continue our relationship for any coming new project.”
“Steven is an excellent professional with great knowledge and technical practice.”
“Steven is a very detail-oriented project manager and engineer who can solve problems creatively and also provides excellent service. It was a pleasure working with him.”




Custom Plastic Mould Solutions by Product & Industry
Explore our specialized engineering specifications, steel grades, cycle-time benchmarks, and DFM standards across 18 core tooling lines:
Car Bumper Moulds
Internal parting technology & 8–12 drop SVG sequential valve gating for zero weld lines on Class-A fascias.
Car Door Panel Moulds
SVG sequential gating, porous-vented speaker meshes & zero-sink doghouse lifters for grained trims.
Radiator Grille Moulds
500T die-spotted honeycomb shut-offs in mirror S136 for blister-free chrome & piano-black ASA.
Plastic Crate Moulds
High-speed mesh fruit crates, 24-cell bottle crates & collapsible boxes with BeCu corner cooling.
Plastic Pallet Moulds
1200×1000mm 9-leg nestable & 3-runner steel-reinforced rackable pallet tooling with 12–16 hot drops.
120L / 240L Dustbin Moulds
EN 840 wheelie bin & household pedal bin moulds with anti-shift locks, BeCu rims & air-poppet ejection.
Plastic Chair Moulds
Monobloc, rattan armchair & gas-assisted chair moulds with interchangeable backrest pattern inserts.
Plastic Stool Moulds
Stackable dining stools, rattan stools, TPE anti-slip step stools & 5-piece foldable stool sets.
Paint Bucket & Pail Moulds
1L–25L round/square pails & tear-band lids holding ≤0.08mm concentricity, IML robot ready.
Thin-Wall Container Moulds
0.38–0.65mm takeout food boxes, bubble-tea cups & IML dairy tubs with dual-cone self-locking.
PET Preform Moulds
1 to 72 cavities pneumatic valve-gate preform tooling for PCO 1881/1810 water, oil & 5-gallon jars.
Cap & Closure Moulds
8–72 cavity beverage caps, 5-gallon caps, motorized unscrewing & In-Mold Closing (IMC) flip-tops.
Battery Case & Box Moulds
Automotive N-series, DIN, inverter IT500, UPS & Li-ion cell containers with leak-proof sealing flanges.
Safety Helmet Moulds
ANSI Z89.1 & EN 397 hard hat shell, 6-point harness & ratchet moulds with stress-free crown gating.
Pipe Fitting Moulds
Collapsible-core, arc-core & hydraulic chain-core moulds for elbows, tees & threaded fittings.
Electronics & Connector Molds
Tight-tolerance enclosures, terminal blocks & pin headers in UL94 V-0 PC/ABS, PA66+GF, PPS & LCP.
Printer & Office Equipment Molds
Multi-slide structural housings for multifunction printers, copiers, POS terminals & server bezels.
Plastic Flower Pot Moulds
Fast-cycling gallon nursery pots & 3D rattan planters with hardened H13 flash-free drainage shut-offs.
Injection Mold PRICE AND MANUFACTURING PROCESS

Injection Mold Quotation Process
The injection mold quotation process can seem complex for customers who are new to injection molding manufacturing. With multiple steps involving design, engineering, tooling, and production planning, generating an accurate quote requires expertise and care.
Click for more
Key Factors Influencing Injection Mold Pricing
Injection mold pricing depends on numerous intersecting components and influencing variables. Unlike simple manufactured parts quoting, mold costs encompass specialized design, engineering, machining, components, automation, and project management.
Click for more
Injection Mold Manufacturing Process
Below we detail our advanced mold machining technology, quality standards, inspection protocols, and process controls.
Click for morewhat we supply
- Plastics Design
- Rapid Prototyping
- Multi-cavity Plastic Mold
- Family Plastic Mold
- Hot-runner Plastic Mold
- Plastic Molding (Injection and Blow)
- Secondary Operations
- Assembly




