Assemblies and kits
Riveted · fitted · kitted
Riveted and welded sheet-metal assemblies, and kits of matching metal and plastic parts, painted to match and packed as one unit.
QuantitiesKits and sub-assemblies in scheduled batches
Capabilities · 03 · Machined · cast · molded
Plastic injection molding and molds to your drawing
Plastic parts machined, cast or injection molded, depending on quantity. Prototypes are machined or vacuum-cast; for production the factory builds an injection mold for your part and agrees gate, ejector and parting-line positions with you before the mold is cut.
At a glance
| What we produce | Covers, enclosures, housings, bezels, clips and technical plastic parts. |
|---|---|
| Processes | CNC machining for prototypes and small batches · vacuum casting in silicone molds for short runs · injection molding in a mold built for your part |
| Materials | Technical plastics, for example ABS, PC/ABS and glass-filled PA66. The grade is set by your drawing. |
| Finishes | Painting (PU and epoxy primer systems), texture to your sample, silk-screen printing. |
| Tolerances | To your drawing and specification. Tolerances and features that cannot be held are raised before production; any drawing change is approved by you in writing. |
| Quantities | From machined or cast prototypes to hundreds and thousands of molded parts per lot. |
| Lead time | The lead time depends on the part and is stated in the quotation, together with the date the order will be ready at the factory. |
| Documents | First-article report on the first molded samples; inspection report; material report where required; photos. |
Three routes, chosen by quantity
Machined plastic
For prototypes and small batches, parts are CNC machined from plate or rod. It is the fastest route to a functional part and the standard way to validate a design before a mold is built.
Vacuum casting
For short runs, parts are cast in silicone molds made from a master. Cast parts are close to molded parts in appearance and can be painted.
Injection molding
For production, the factory builds an injection mold for your part. Gate, ejector-pin and parting-line positions, and the contact points on cosmetic faces, are agreed with you in writing before the steel is cut.
Mold approval
The first shots are measured and sent to you as first articles. Production is released only after your written approval, and the approved samples become the reference for later lots.
Materials
| Material | Examples of grades | Applications | Suitable finishes | Note |
|---|---|---|---|---|
| ABS and PC/ABS | Grade per drawing | Enclosures, covers, bezels | Painting, texture, silk-screen | Name the color system if parts must match painted metal parts. |
| PA66, glass-filled | e.g. 30% or 50% glass fiber | Structural clips, brackets, housings | As molded | On one order 30% glass-filled PA66 was not obtainable; 50% was proposed and approved in writing. |
| Other technical plastics | Grade per drawing | Insulating and wear parts | On request | Specify with the drawing; availability is confirmed before the quotation. |
Finishes
| Finish | Materials | What to specify |
|---|---|---|
| Painting (PU and epoxy) | Molded and cast parts | Primer system, color, gloss, and curing time before packing. |
| Texture | Molded parts | Texture reference or sample; it is applied to the mold. |
| Silk-screen printing | Painted or molded parts | Printed from your PDF artwork; position and color as drawn. |
Tolerances and inspection
Tolerances come from your drawing and specification. Your drawings go to the production engineers of the factory selected for your part. If a tolerance or a feature cannot be held, we raise it before production, and any change to the drawing is confirmed and approved by you in writing. Production is to the drawing.
Molded parts are manufactured to your drawing. Shrinkage, draft angles, wall thickness and sink marks are reviewed with the factory before the mold is designed, so that the mold is cut for the part on your drawing.
Critical dimensions are measured on the first shots and reported to you, and series production is released only after you approve the samples.
Inspection and documents
The factory inspects each order to your drawing or QC sheet and supplies a report. Our team in China then carries out an independent quality verification at the factory, after production and before the goods are released, and the packing is photographed. Where you specify 100% inspection, every part is inspected. Where first articles are required, series production is released only after your written confirmation. Material reports or certificates are supplied where your drawing or PO requires them.
Design notes
Engineering note
Give painted plastic time to cure.
Paint adhesion on cast and molded plastic depends on the primer system and the curing time. Specify the paint system and finish on the drawing; rest and curing times before packing are agreed before production.
Engineering note
Agree gate and ejector positions.
Gate and ejector marks are visible on the part. Show which faces are cosmetic, and the positions are agreed with you before the mold is cut.
Engineering note
Machine before you mold.
A machined or cast prototype costs considerably less than a mold and verifies fit before tooling is committed. The mold is built once the design is released.
From a past order
Name the glass content.
Glass-filled grades differ in stiffness and shrinkage. If a grade is not readily available, this is stated before the quotation, with an alternative for your written approval.
Example parts
What to send for a quote
- PDF drawing with tolerances and revision letter
- STEP model (needed for mold design)
- Material grade, color and any flame or UV requirements on the drawing
- Cosmetic faces and texture
- Quantities: prototypes, first lot and expected yearly volume
- Documents you need with the parts
Send to or@paxis-hk.com. The RFQ checklist explains each item.
Questions
Who owns the mold?
The mold is built for your part and paid for in your order; ownership and where it is kept are stated in the quotation.
How long does a mold take?
The lead time depends on the part and is stated in the quotation, together with the date the order will be ready at the factory.
Can you produce plastic parts without a mold?
Yes. Prototypes and small batches are machined or vacuum-cast, which needs no injection mold.
Which plastics can be molded?
Technical plastics to the grade on your drawing, for example glass-filled PA66. The grade is not substituted without your written approval.
Further reading
Related capabilities
Technical illustration
EVA and custom packaging
Cut · printed · packed
Foam inserts that hold each part in place, cases, printed boxes with your artwork, and protective films cut to your DXF.
QuantitiesTo your order quantity
CNC machining
Milled · turned · 5-axis
Housings, holders, plates, pins, shafts and rings in aluminum, stainless steel, steel, brass, copper and technical plastics.
QuantitiesFrom about 10 first articles to production lots of thousands
Send your plastic part drawing
Email the PDF and STEP files with material, finish and quantities to or@paxis-hk.com, or use the short form. Drawing questions are raised before the quotation.