PCB Prototype the Easy Way
Full feature custom PCB prototype service.
Stereolithography (SLA) is an industrial 3D printing process used to create concept models, cosmetic prototypes, and complex parts with intricate geometries in as fast as 1 day. A wide selection of materials, extremely high feature resolutions, and quality surface finishes are possible with SLA. SLA is a go-to choice for 3D printed models that require accurate features and a smooth surface finish.
A photosensitive suspension (photopolymer resin) is exposed by light (of certain wavelength) so it cures. The exposure pattern for each 3D slice is defined by a 2D photo mask (ultraviolet (UV) laser, UV light projector/DLP or LCD). After a layer is photocured, the Z axis moves up for the next layer of the 3D object. An FEP film clamped against the glass is used as the release layer.
There exist three common photo mask and light source combinations:
-ultraviolet (UV) laser
-Digital light processing (DLP) projector and UV lamp
-LCD panel and UV lamp
The type of photopolymer resin used (visible-light-curing or ultraviolet (UV)-curing) has to match the type of photo mask and light source combination.
-resin: UV-curing resin with absorption range 250 to 450 nm
-light source: UV lamp/LED 405 nm
-photo mask: LCD panel allowing to pass the UV lamp frequency
SLA 3D prints are often used for final fit checks before moving to injection molding services. Stereolithography is an additive manufacturing process that can 3D print parts with small features, tight tolerance requirements, and smooth surface finishes.
SLA has tolerances of +/-.004” per inch, and resin surface is ideal for post-processing like polishing and painting.
SLA is one of the cheapest method for rapid prototyping while preserving a good surface quality and accuracy.
SLA allows to integrate multiple components as well as thin-walled objects and intricate geometries that traditional method won’t be capable of.
SLA 3D printed parts do not require tooling which reduces the manufacturing lead time from weeks to days, allowing for faster innovation and speed to market.
There’re various material with special properties like toughness, heat resistance, flexibility, which simulates the end products.
Multiple, identical parts can be built on a single platform at one time, greatly increasing production efficiency.
Photopolymers are not stable over time and most resins don’t have balanced impact/heat resistance.
The unit cost and lead time will not be reduced as much as casted or molded parts.
|Maximum build size||2100 x 800 x 700 mm|
|Minimum wall thickness||0.8 mm|
|Dimensional accuracy||L<100mm,±0.2mm. L>100mm,±0.2%*L(mm)|
|Typical surface finish||3 – 10 microns RA|
The table below depicts the general tolerances for industrial-grade stereolithography (SLA) services. Stresses during the build, support strategy and other geometry considerations may cause deviation in tolerances and flatness. Improved tolerances may be possible with a manual quote review, after successful completion of a prototype build, and must be approved on a case-by-case basis.
SLA Materials Available at PCBWay:
Here is a list of standard surface finishes. For custom surface finishes such as electroplating or polishing, please contact firstname.lastname@example.org.
Get painted according to the color pattern provided by the customer (Including matte paint, high-gloss paint, electroplating-imitation paint, varnish, leather paint,etc).
The surface texture is polished in a variety of ways to meet the actual needs of customers. The transparent parts can be polished accordingly to improve transparency and light transmittance.
Provide electroplating services, improve the overall strength of the parts, provide metal-like surface texture, and make it have certain metal characteristics.
At the specific bottom hole position that needs to be processed, the internal thread is processed.
The surface of the part is glazed to better imitate the appearance of handicrafts. Have mature assembly experience to ensure the overall display of the product.
The unique outer coating processing ability improves the strength of the product structure, reduces external wear, and can better avoid damage caused by normal storage and use.
A variety of measuring equipment provides reasonable measure services according to the actual needs of customers.