Prototype injection molding

Prototype injection molding:Prototype plastic molding

Prototype injection mold is the trial mold to make small quantities plastic parts production, normally the quantities is less than 10,000 pcs. SEASKYTOOLING offer prototype injection mold manufacturing and prototype injection molding for global market.

Steel for prototype injection mold manufacturing:

Prototype injection mold core and cavity steel is chosen based on your plastic part quantities, plastic resin and plastic product structure:

  • The lower quantity, the cheaper core and cavity steel,
  • The more rigid resin or more wearing(like nylon with glass fiber) or corrosive resin, the more expensive steel,
  • Normally we can choose S50C(1050), aluminum and P20 steel for the prototype core and cavity, sure you can also choose another steel. In China there is also cheaper 420 stainless steel for the corrosive resin molding. You can download our mold steel list to know more for steel for mold manufacturing.

Prototype injection molding resin:

You should also choose the resin for mass injection molding production to have the prototype injection molding. then you can get the real plastic parts like the mass production on the prototyping process.

Why you need to make prototype injection mold?Prototype injection molding

  • Normally for the really huge injection molding project, you choose the prototype injection molding to assure your investing is safe.
  • If you plastic product is complex and you have no 100% confidence to have a good shot, you should consider the prototype injection molding.
  • Also prototype injection molding is one of the fast manufacturing process to have the plastic samples.
  • You can invest low cost to have plastic parts production to test your market. If so, you have to pay more attention on the core and cavity steel selection as this kind of prototype injection molding is not one time production.

Prototype injection mold manufacturing lead time:

Normally prototype injection mold is one cavity mold, sure you choose the family mold. The lead time for prototype injection mold is from 10 days to 30 days, there will be more time is your plastic product is complex.

How to choose prototype injection molding and prototype injection mold manufacturing supplier in China?

You should also choose the plastic injection mold supplier to make your prototype injection mold, but not the prototype manufacturing factory. Normally in China the prototype manufacturing factory business is to make plastic prototype by using plastic casting, machining, 3D printing, SLA and SLS etc. Sure there is just a few prototype manufacturing factory have injection mold making capacity.

You can also choose the have mold manufacturer to make the prototype injection mold to move to your plant for the injection molding, please ask your China mold supplier if you they can export the mold to you before you start to purchase the prototype injection mold.

SLA rapid prototype

Transparent plastic prototype manufacturing

There are a few process to have transparent plastic prototype manufacturing as following:

  • CNC machining process with PMMA
  • Plastic casting process
  • SLA process
  • 3D printing

We can choose transparent plastic prototype manufacturing process based on your demand such as qualities, use and function etc.

CNC transparent plastic prototype manufacturing

This is common widely use transparent plastic prototype manufacturing process. If you need high quality transparent plastic prototype such as plastic lenses, transparent cover and transparent enclosure, transparent enclosure and transparent led lamp enclosure etc. You can choose PMMA CNC machining process.

Sure it is also okay to machining with polycarbonate , but the polishing process is more difficult to control than PMMA, we did not suggest to use this resin to make transparent plastic prototype for  lens or high smooth transparent part.

Plastic casting process

This process to make the RTV silicone mold to cast plastic prototype. You can lean more from our another blog, post is plastic casting prototype . You can also review resin casting on

Plastic casting transparent prototype can be polished too, but it still worse than PMMA CNC machining prototype.

This process can make transparent plastic prototype, the material is not really resin what we used for injection molding, it is cast two kinds of liquid chemical compound into silicone mold to form plastic parts. If you need plastic parts with FDA, please do not consider this process.

Also plastic casting prototype surface finishing is worse than the PMMA CNC machining process, if you need high quality smooth transparent parts, please do not use this process.

Transparent plastic casting prototype is cheapest process to copy transparent parts. Also it can be copied complex transparent plastic prototypes.

SLA to have transparent plastic prototype

SLA rapid prototyping is a discrete layered, layer by layer stacking technology, the direct use of three-dimensional computer data is implemented as a prototype of the product, the more mature laser technology both SLA and SLS rapid prototyping, which the SLA the main material for the photosensitive resin.

SLA rapid prototype’s advantages:
A smooth surface, and good quality.
Forming high precision, and accuracy of 0.1mm;
Can be made very fine details and molding of thin-walled structures, high precision, easy post-processing.
Processing cycle is short, usually it is three days.

SLA transparent prototype manufacturing is weaker than the PMMA CNC machining prototype and transparent plastic casting prototype. Also it is more expensive than both of transparent prototypes. SLA transparent manufacturing process can have complex plastic prototype even if you have lots of undercuts.

3D printing transparent plastic prototype manufacturing

Here we just call the desktop 3D printing prototype. Generally, this process can not get a high quality smooth surface finishing transparent prototype. But the prototype is stronger than plastic casting one.

As the technique developing, we hope this process can be widely use to copy transparent plastic parts. Also right now this process is more expensive than plastic casting prototype manufacturing.