Thick Gauge food grade polypropylene Machine Housings in 4 mm – Semiconductor Equipment Range

These food grade polypropylene machine housings are thick gauge vacuum formed parts supplied to drawing for semiconductor equipment. They are formed from food grade polypropylene sheet at 4 mm, trimmed on 5-axis routers and inspected against the drawing before packing. Buyers choose this route where a metal fabrication is too heavy, or where injection moulding tooling cannot be justified for the volume.

Product specification

Key features

• One piece shell replaces a fabrication, so assembly hours drop
• food grade polypropylene keeps the weight down while stiffness is held through the formed shape
• Mould texture finish as standard, further finishes on request
• Trimmed on 5-axis routers, so mounting holes and cut outs match the drawing
• Tooling stored against the part number for repeat and spare orders
• dimension reports with every release

Typical applications

• carrier trays
• equipment covers
• chemical tank liners
• fan shrouds
• machine housings used across general semiconductor equipment builds

How it is made

1. Parts are inspected, fitted with inserts or hardware if required, packed and shipped.
2. Sheet is dried when the material needs it, then heated to forming temperature on the machine.
3. The sheet is formed over the mould with vacuum and, where the draw is deep, with plug assist.
4. Trimming is done on 5-axis routers or with a dedicated trim fixture to meet the drawing.
5. The part cools on a jig so the shape is held while the material stabilises.

Material: food grade polypropylene

Food grade polypropylene is used for trays, hoppers and liners that touch product, and it can be washed with caustic cleaners.

Design notes

• add ribs or returns instead of increasing sheet thickness to save weight and cycle time
• call out the finish on the drawing: mould texture, paint, or as-formed gloss
• hold the draw ratio near 1:1 for deep parts, or specify plug assist
• keep a draft angle of at least 3 degrees on vertical walls so the part releases cleanly

Finishing and assembly options

• mould texture
• as formed gloss
• satin finish
• Threaded inserts, PEM fasteners and brackets fitted before dispatch
• Mating parts can be trial assembled before the first article ships

Quality

Sheet thickness is checked on the formed part at the points shown on the drawing, and the readings go into the report. First article inspection covers critical dimensions, wall thickness, colour and texture against the approved sample.

• UL94 V-0 grades available
• material certificates with every batch
• REACH compliant sheet available

Packing and delivery

Large panels are crated in made to measure wooden cases with corner protection. Standard lead time to first article is 2–3 weeks, and repeat releases ship against stored tooling without a new proving run.

Frequently asked questions

What quantity can I order?

Sample quantities start at one piece off printed tooling. The process pays back from about 25 pieces a year and runs well into several thousand.

How fast is the first article?

Seven to fifteen working days from drawing release for sample tooling, with production tooling in three to four weeks.

Can you make it in another material?

Any grade in this family can be swapped in. Send the requirement and the material will be quoted with the price difference shown.

Request a quotation

Send the drawing or a photo of the current machine housings with the quantity and the finish required. The reply covers material choice, wall thickness, tooling route and price, so the decision is made on a complete picture.