Since inception in 1995 we have maintained a business culture that is obsessed with the pursuit of excellence and utterly opposed to letting Harvest be just another “me too” supplier. The pioneering spirit of our engineering staff has led them to innovate custom manufacturing hardware and proprietary production systems, as well as critical processes of continuous improvement and best practices that continually push us to advance our capabilities. The resulting gains have enabled us to serve a much broader array of applications by significantly increasing the strength and functionality of the parts/assemblies we build. Additionally it has made direct digital manufacturing in higher quantities a reality for many of our customers.

With an eye to the future, Harvest’s engineering staff is persistently pushing to advance our capabilities with current additive manufacturing (AM) technology, and to develop new breakthrough technology. Through collaborative efforts with key academic and industry partners, as well as our own internal R&D resources, our engineers are developing innovative new processes, post-processes, and high performance material systems. The net effect of this is:

  • Improved product quality
  • Greater production efficiency
  • More choices & better options
  • Added repeatability & consistency
  • Faster turnaround time
  • Appreciable economies of scale

Our engineering department serves as the key driver of this objective, and they do so through two main initiatives:

Optimization:   True craftsmanship is taking the best available tools and using them in the most effective ways to produce a superior product. This is the approach our engineers are taking as they simultaneously attack multiple fronts, including: manufacturing platforms & hardware, production systems, secondary post-processes, and new materials/variants. We commonly perform offline trials and D.O.E.’s (designs of experiment) in a scientific, systematic manner to maximize the performance of the machines and optimize the properties of the materials. The ultimate objective of our engineers is to develop the optimal technical “recipes” to consistently, rapidly, and cost-effectively produce parts, assemblies and products that perform at peak levels of functionality.

Innovation:   With the greater good of the AM industry always being a top priority at Harvest, our engineering staff will continue to participate in the development of new technology. We are actively engaged in several joint and individual initiatives that promise to yield tangible gains in the not-so-distant future. We cannot go into detail about these developments at this time, but suffice it to say that everything our engineers are working on is for the purpose of providing our customers superior options and solutions. We look forward to sharing news of them with you when the results are in, and are able to make these new capabilities available. Stay tuned!

 

AUVSI’s Unmanned Systems North America
Las Vegas, NV

August 7-9, Harvest will be showcasing a variety of direct manufactured parts and prototypes at the Unmanned Systems North America tradeshow in Las Vegas at the Mandalay Bay Convention Center.

For more information regarding the AUVSI Unmanned Systems NA Show, please click here.
 

Harvest Launches Somos® ProtoTherm 12120 In-House

In our ongoing quest to provide you the most cutting-edge rapid prototyping and direct additive manufacturing solutions, Harvest Technologies has added a new high performance stereolithography (SL) material. Somos® ProtoTherm 12120 is a unique high-temperature and water-resistant plastic that combines temperature tolerance with the accuracy and fine detail that SL is known for.  Additionally, a thermal post-cure treatment can further increase the tensile strength of 12120 while still preserving adequate elongation at break. Though not as temperature resistant as ceramic filled photo-polymers, it is less brittle making it a better all around material for a broad variety of applications.

Somos® ProtoTherm 12120 is ideal for producing functional prototype parts for many industires including medical, consumer products, aerospace and automotive. Additionally Its natural cherry red appearance is visually appealing, making it well suited for some aesthetic applications. We can also produce small parts and fine features using our high-resolution SL machines.

Applications include:

  • Consumer electronics
  • High-temp water flow analysis
  • Housings and enclosures
  • Connectors
  • Functional prototypes

Click here to vew the 12120 data sheet.

 

New Prototherm 12120

 

To achieve your objectives and optimize your results, it is important to know and consider the realistic capabilities and limitations of today’s additive manufacturing processes and materials. There are some inherent design constraints, as well as unique freedoms, that come with tool-less manufacturing that should be factored in for production of prototypes, models, patterns and tooling via layer additive processes. For example, mating parts should not be modeled line-to-line or with overlapping interference.  Typically parts will not fit together without secondary post-processing that takes time and creates greater opportunity for error due to making manual modifications.  It is generally best to provide at least 0.010″ clearance between mating surfaces to optimize fitment.  Likewise, it is important to design your 3d objects within the parameters of the process tolerances to achieve a satisfactory result.  Go to www.harvest-tech.com/quality for more details. Small size constraints:

Process Minimum Wall Thickness 1 Minimum Feature Size 1
SLS 0.025″ – 0.040″ 2 0.020″ – 0.040″ 2
SLA .010″ / 0.020″ 3 .010″ / 0.020″ 3
ProJet 0.010″ 4 0.005″ 4


1 Geometry dependent – Fine features & walls built near perimeter and contoured surfaces more difficult.
2 Material dependent – SLS Flex and CastForm are not as fine as nylon based SLS materials.
3 Build mode dependent -Hi-Res mode on Viper si2 systems is finer than standard SLA build modes & platforms
4 ProJet has two build modes:  High Def & Ultra High Def, both of which are capable of extremely fine detail.

 
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