Pressure forming vs vacuum forming — what is the difference?

Vacuum forming pulls the sheet onto the tool with vacuum alone and is the most economical option. Pressure forming adds positive air pressure for sharper definition, tighter radii, undercuts and cosmetic surfaces. Choose vacuum forming for covers, trays and packaging; choose pressure forming when the part must look injection-moulded.

When should I choose pressure forming over injection moulding?

For low-to-medium volumes of cosmetic parts — equipment bezels, medical housings, kiosk fascias — pressure forming delivers a comparable appearance with tooling at 10–20% of injection cost and first parts in weeks instead of months.

Pressure forming services · India

Custom pressure forming — injection-mould looks, thermoforming cost

Q: What is pressure forming?

Pressure forming is a thermoforming process that adds compressed air on the back of the heated sheet — pressing it into the mould at several times atmospheric pressure. The result is crisp detail, sharp radii, formed-in textures and logos, and a surface quality close to injection moulding, at a fraction of the tooling cost.

Indu Thermoformers offers pressure forming in Mumbai, India — for parts that must look injection-moulded without injection-mould tooling money or lead time. Pressure formed enclosures, bezels, housings and panels with crisp detail, formed-in texture and sharp radii, backed by in-house sheet extrusion, tooling and 5-axis CNC trimming.

Get a Pressure Forming Quote Compare with Vacuum Forming

What is pressure forming?

Pressure forming is vacuum forming's high-definition sibling. As the vacuum draws the heated sheet onto the mould, compressed air presses it from behind at several times atmospheric pressure — forcing the plastic into every corner, texture and detail of the tool. The result: sharp radii, crisp formed-in features and cosmetic surfaces close to injection moulding, while keeping thermoforming's soft tooling, fast lead times and low cost. It's the process of choice for equipment enclosures and bezels where appearance sells the product.

See how it sits among the other thermoforming processes, or read the in-depth pressure forming guide.

Pressure forming cross-section — compressed air presses the heated sheet into the mould for sharper detail than vacuum alone — Compressed air on the back of the sheet captures detail, sharp corners and texture that vacuum alone rounds off.

Why teams choose pressure forming

Crisp detail & sharp radii

Formed-in logos, louvres, ribs and undercuts with definition vacuum alone cannot achieve.

Injection-mould cosmetics

Textured, Class-A-style surfaces straight from the tool — no painting step required.

Thermoforming economics

Tooling at 10–20% of an injection mould, first articles in 2–4 weeks, changes in days.

Engineering materials

ABS, ABS-PMMA, PC and FR (UL 94 V-0) grades — extruded in-house, colour-matched to Pantone/RAL.

Talk to a pressure forming engineer

Send a drawing or sample and we'll confirm the process, material and tooling — usually within 24 hours.

Talk to an Engineer Material Selection Help

Pressure formed enclosure panels and housings with formed-in texture, cut-outs and sharp detail — Pressure formed housings and panels — textured surfaces, crisp cut-outs and sharp detail, straight from the tool.

A finish that sells the product

Formed-in textures, sharp radii, recessed logos and display cut-outs — the cosmetic details buyers associate with injection moulding, delivered on soft tooling at a fraction of the cost. Colour-matched to Pantone or RAL in sheet we extrude ourselves, so no painting step is required.

Browse the product library →

Pressure formed parts we make

Medical device housings & bezelsInstrument & diagnostic enclosuresKiosk & POS fasciasAMR & robotics coversEquipment front panels with display cut-outsEV charger housingsAerospace & rail interior trimsPremium appliance panels

See finished work in the product library → or the case studies →

Pressure forming in the field

Anonymised by sector — the engineering is exactly as it ran.

Case snapshotWarehouse robotics

Impact-resistant covers for autonomous mobile robots

Challenge: An AMR manufacturer needed precise sensor cut-outs, genuine impact resistance and a premium high-gloss finish in an FR-capable material — with glass-fibre enclosures proving heavy, slow and costly.
Solution: ABS-PMMA pressure formed covers with UL 94 FR options, 5-axis CNC-trimmed to tight tolerances with datum-referenced sensor apertures for pick-and-place assembly.
Result: A lighter, more cost-effective alternative to glass-fibre, ready for volume, with the premium surface finish the product brand required.

ABS-PMMA

gloss + impact

Datum

trimmed apertures

UL 94

FR options

More case studies →

Pressure forming quote

Need an injection-moulded look without the tooling bill?

Send your drawing or sample — we'll confirm whether pressure forming suits the part and reply with material, tooling approach and a quote, usually within 24 hours.

Get a Quote Read the Pressure Forming Guide

ISO 9001:2015 certified · Most quotes back within 24 hours