Since the late 70 's we design machines, devices, or components for production of plastic products.

We started the career at a time when industrial production solutions were not available as today, which is just search Google to find the appropriate equipment, everything had to be invented and developed.

Search for books, trapping in the library. Consult with how known. Roll up your sleeves and DO!

This hard experience, consolidated by long years of improvement in knowledge of mechatronic systems, learning about polymer processing and the huge amount of developments realized during all this time, made us able to accept great challenges.

Our portfolio of experience and knowledge in design and construction of machines covers the following areas (not exclusively):

Design and construction of :

Some of the projects we do integrate development of models and special designs, containing secrets that are not common knowledge.

                                                                                                                                                       Gearbox quadri-tangential to co-rotating extruder

Very important and difficult case is the transmission gearbox of a parallel twin screw extruder, either the co-rotating or counter rotating. By difficulty to transmit high torques to the two screws, having distance between centers very small.

In these two cases have developed a design own, unpublished, and giving excellent results and performance, with torque 20% higher than normal.

The D&D has great expertise in this type of project, in the case of twin screws, the gearbox is the soul of the machine.

            Gearbox for twin parallel extruder counter rotating, this model is bi tangential, for higher torque .

These projects are carried out making use of the most modern software engineering resources, all components are severely tested in simulation of STRESS-STRAIN ANALYSIS, to ensure the correct choice of materials, heat treatment and life more than 10 years.

This is a sample report of the result of a set of gears, loads and the material used in the test, and the positive result! With safety factor > 1.2

Another specialty of our company is extrusion screw design, for double screw extruder, mainly counter rotating, parallel or conical.

There are many variables that make up the equation: the specific conditions of work such as rotation, temperature, load loss of the die/tool, the type of polymer, rheology and his sensitivity to stress from process and even the changes caused in rheology by additives, fillers or formulation.

We have made many designs of screws that are running today on several machines in Brazil, and others countries.

Complementing the extrusion line, we offer project of polymer pump systems in conjunction with screen changer:
 

Some examples of projects for other components:

Conformation for tiles in line for PVC tiles, ABS, acrylic, PP and other composites.

See more details!

These examples are only a sample of the ability of achievement acquired during these 40 years. We cannot show details or data from projects by maintaining the confidentiality with our clients, which is sacred to us.

The D&D Enterprises is proud to maintain ethical and responsible conduct with their customers.

The talent and creative genius are ours, and we can use and abuse them for all future projects, but the intellectual property of already made, belongs to the client that the acquired.

D&D offers different forms of contract to develop their projects.

With exclusivity and confidentiality, with licensing and Royalty system, or just fees.

Come chat with us, we will have great pleasure in getting to know your idea and offer our solution.