Complete plastic stool mold solution

Turn a stool into steel mould that can run.

From DFM and moldflow to steel, hot runners, conformal cooling, tryout and handover — you get cycle time, yield and tool life, not just a block of steel.
√ 200+
√ Chair mould projects
√ 1,000,000
√ Shot life potential
√ ±0.05mm
√ Critical tolerance
√ 30+
√ Export markets
Application Coverage
Four stool families, one tooling method
One engineering method, sized for different markets, loads and finishes.
One-piece stool molds
One-piece stool molds are used to produce plastic stools with the seat and legs integrally molded as one piece. Featuring a compact structure, high strength, and no assembly required, they are widely used for household dining stools, children's stools, shoe-changing stools, and bathroom stools, as well as in restaurants, cafés, cafeterias, outdoor leisure areas, and public spaces. Mold design focuses on the transition between seat and legs, uniform wall thickness, base ribs, and load-bearing structure to ensure stability, durability, reliable load capacity, and resistance to deformation. One-piece molding also offers easy cleaning, stacking, and transport — ideal for high-volume, standardized production.
Separate-leg stool molds
Separate-leg stool molds are used to produce plastic stools with the seat and legs molded separately and assembled afterward. Featuring a flexible structure, easy packing and transport, and replaceable parts, they are widely used for household dining stools, study stools, office stools, commercial restaurant stools, and any scenario requiring knock-down shipping. Mold design focuses on the fitting structure between seat and legs, assembly hole accuracy, connection strength, and load-bearing design to ensure firm assembly, stable use, and resistance to loosening. The separate-leg structure also allows shared seat molds and interchangeable leg styles — ideal for multi-style, small-batch, or flexible combination market needs.
Rattan-look or custom-shaped stool molds
Rattan-look or custom-shaped stool molds are used to produce plastic stools with woven rattan textures or unique designs, combining decorative appeal with practicality. They are widely used in homes, restaurants, cafés, hotels, B&Bs, patios, and commercial displays. Mold design focuses on precise reproduction of rattan texture, consistent forming of complex curved surfaces, uniform wall thickness, and smooth demolding. Rattan textures require EDM or precision engraving to ensure clear, natural patterns, while custom shapes demand careful parting line, slider, and ejection design to avoid scratching, deformation, and stress whitening. Overall advantages include distinctive appearance, rich texture, and flexible design — ideal for mid-to-high-end home and commercial spaces.
Folding stool molds
Folding stool molds are used to produce collapsible plastic stools featuring a lightweight structure, flexible folding, and space-saving design. They are widely used at home, camping, fishing, outdoor leisure, temporary seating, and commercial events. Mold design focuses on the folding hinge structure, open-and-lock positioning, locking mechanism, fit clearance between seat and legs, and load-bearing and stability design to ensure stable unfolding, smooth folding, and reliable durability. Overall advantages include portability, easy storage, and convenient transport — ideal for high-volume production of household, outdoor, and portable products.
Workflow
Custom Stool Mold Development Process
From initial 3D conceptualization to final trial shot testing in our high-tonnage injection machines, our streamlined 6-stage process ensures total transparency.
Discuss the product dimensions, structure, appearance, material, mold steel requirements, injection machine tonnage, and other key information needed for product design.
Communication of requirements
Discuss the product dimensions, structure, appearance, material, mold steel requirements, injection machine tonnage, and other key information needed for product design.
Step 1
The documents to be confirmed include: product 3D drawings, mold drawings, and any related drawings required for mold flow analysis, if applicable.
Technical Drawing Approval
The documents to be confirmed include: product 3D drawings, mold drawings, and any related drawings required for mold flow analysis, if applicable.
Step 2
Prepare the required steel according to customization needs, and arrange mold processing such as CNC machining, EDM, deep-hole cooling, polishing and texturing, as well as steel heat treatment.
Custom Materials & Mold Processing
Prepare the required steel according to customization needs, and arrange mold processing such as CNC machining, EDM, deep-hole cooling, polishing and texturing, as well as steel heat treatment.
Step 3
Conduct trial molding and send samples to the customer for confirmation, and keep improving the mold until the customer approves it as qualified.
Trial Sample Approval
Conduct trial molding and send samples to the customer for confirmation, and keep improving the mold until the customer approves it as qualified.
Step 4
Prepare the mold 2D/3D drawings, inspection reports, etc., and customize wooden crates as required, arrange booking, and confirm the shipping schedule.
Shipment and Delivery
Prepare the mold 2D/3D drawings, inspection reports, etc., and customize wooden crates as required, arrange booking, and confirm the shipping schedule.
Step 5
Provide services such as rapid response, technical support, repair and maintenance, and spare parts supply for customers' mold usage.
After-sales Follow-up Service
Provide services such as rapid response, technical support, repair and maintenance, and spare parts supply for customers' mold usage.
Step 6
Engineering solutions
Tooling engineered for stool geometry
Household, stackable, step and kids stools fail in the same places: heat at the foot roots, sink in the seat, stack lock-up, scuffed ejection.
√ Uniform Wall Thickness Control
Wall thickness across the seat and legs must transition evenly to prevent sink marks, deformation, and stress whitening, ensuring consistent appearance and load capacity.

√ Load-Bearing and Rib Design
Reinforcing ribs are typically added under the seat and at the leg base to improve load capacity and resistance to deformation, ensuring stability and durability.

√ Parting Line and Demolding Optimization
Parting lines, sliders, and ejection systems are designed based on the seat, leg, and backrest structure to ensure smooth demolding and avoid scratching or deformation.
√ Surface Texture and Polishing
High gloss, matte, leather grain, or rattan textures can be applied as required. The mold needs corresponding polishing or EDM processes to ensure clear, consistent texture.

√ Stacking and Fit Structure Design
For stackable stools, the mold must precisely control stacking angle, fit clearance, and stack height to ensure stable stacking and easy storage and transport.

√ Hinge and Assembly Structure Precision
For folding and separate-leg stools, the mold must precisely control hinges, snap fits, assembly holes, and connection structures to ensure smooth folding, firm assembly, and stable use.
Spec Sheet
Configurable Mould Parameters
Typical ranges only. Final build follows part size, resin grade and target output. Part size determines mold structure and machine tonnage; resin grade determines steel and runner system; target output determines tool life and steel grade. Cooling, surface finish, lead time and budget should also be confirmed together.
ItemOptions / ValuesNotes
Cavity / Core SteelP20, 718H, 2738, NAK80, H13, S136Selected by tool life and polish requirements
Cavity / Core HardnessPre-hardened steel HRC 30–35; Heat-treated steel HRC 48–52Directly affects wear resistance and mold life
Mold BaseLKM / HASCO / DME / MISUMILKM S50C or P20 are common choices
Runner SystemHot runner (pin-point gate) / Cold runnerHot runner is common for chairs to reduce cold scrap and improve efficiency
Number of CavitiesSingle cavity (large chairs) / Multi-cavity (stools)Large chairs are usually 1-cavity; small parts can be multi-cavity
ResinsPP, HDPE, ABS, PC, regrindPP is commonly used for chairs; UV-stable PP required outdoors; glass-filled resins need wear-resistant steel
Tool Life300,000 – 1,000,000 shotsP20 approx. 200,000–300,000; 2738/heat-treated steel can reach 600,000–1,000,000
Cycle Time35 – 70 s1.3–2.5 kg chairs: 45–66 s on standard machines; 35–50 s on high-efficiency machines
Injection Machine Tonnage650T – 1650TStandard chairs approx. 850T; PC chairs / gas-assist chairs require 1350T+
Clamp Force CheckProjected area × cavity pressure (350–500 kg/cm²) × 1.17 safety factorMust exceed the parting force; insufficient clamp force causes flash
Surface FinishMirror / grain / rattan EDMParting line should be smooth to the touch
Corrosion ConsiderationPVC/POM/PBT and other corrosive resins require S136, 2316Halogen-containing or acidic plastics require stainless steel molds
CAD / CAEUG, SolidWorks, Pro/E, AutoCAD, MoldflowFill and cooling studies completed before steel is cut
Tools, lines and finished bins
——
HOT PICKS
——
NEW PRODUCTS ONLINE
——
WHOLE HOUSE PACKAGE
——
CUSTOMIZED SERVICES
——
Send the file. A proposal in 2 working days.
Prepare your project details and glass manufacturing specifications, and we will provide you with a quote within 24–48 hours.
Fill out a Request a Quote form
Prepare your project details and glass manufacturing specifications, and we will provide you with a quote within 24–48 hours.
Once the sample or drawing is received, we will provide a solution within 2 working days to ensure you get the best product for your project.
Send Sample/Picture/3D
Once the sample or drawing is received, we will provide a solution within 2 working days to ensure you get the best product for your project.
Once the drawing is confirmed, you can book online, and we will arrange production as soon as possible.
Order Online
Once the drawing is confirmed, you can book online, and we will arrange production as soon as possible.
Request a Quote
WhatsApp:Lynn
WhatsApp:Jack
Email:Contact Us