2835 results about "Rapid prototyping" patented technology

A variety of support structures and build styles for use in Rapid Prototyping and Manufacturing systems are described wherein particular emphasis is given to Thermal Stereolithography, Fused Deposition Modeling, and Selective Deposition Modeling systems, and wherein a 3D modeling system is presented which uses multijet dispensing and a single material for both object and support formation.

The invention is a seamless projection lithography system that eliminates the need for masks through the use of a programmable Spatial Light Modulator (SLM) with high parallel processing power. Illuminating the SLM with a radiation source (1), which while preferably a pulsed laser may be a shuttered lamp or multiple lasers with alternating synchronization, provides a patterning image of many pixels via a projection system (4) onto a substrate (5). The preferred SLM is a Deformable Micromirror Device (3) for reflective pixel selection using a synchronized pulse laser. An alternative SLM is a Liquid Crystal Light Valve (LCLV) (45) for pass-through pixel selection. Electronic programming enables pixel selection control for error correction of faulty pixel elements. Pixel selection control also provides for negative and positive imaging and for complementary overlapping polygon development for seamless uniform dosage. The invention provides seamless scanning by complementary overlapping scans to equalize radiation dosage, to expose a pattern on a large area substrate (5). The invention is suitable for rapid prototyping, flexible manufacturing, and even mask making.

A system for planning a spine surgery, comprising a haptic interface capable of providing force feedback to the user and a computer adapted to simulate a surgical procedure by responding to inputs from the haptic interface and outputting haptic feedback to the haptic interface is provided.

The system further comprising a rapid prototyping unit including a unit that is adapted to create models of the anatomical region where the surgical procedure will be performed in its current unoperated condition and in the predicted postoperative condition. Further the rapid prototyping unit is adapted to create a three dimensional guide to be used in the surgical procedure as well as suggest revisions to the surgical procedure. The system further comprises a computer that simulates loading of the spine and planned implanted hardware using finite element software.

A deposition modeling system incorporates a drive mechanism to feed a strand of filament to create a model. The drive mechanism comprises a pivot block that is rotatably connected to a fixed block and a motor that rotates a drive shaft. A drive roller is connected to the drive shaft and an idler roller is connected to an idler axle that extends from the pivot block in a substantially perpendicular direction to the direction of rotation of the pivot block with respect to the fixed block and in a substantially parallel direction to the drive shaft.

The invention provides systems for integrated haptic design and fabrication of dental restorations that provide significant advantages over traditional practice and existing computer-based systems. The systems feature technical advances that result in significantly more streamlined, versatile, and efficient design and fabrication of dental restorations. Among these technical advances are the introduction of voxel-based models; the use of a combination of geometric representations such as voxels and NURBS representations; the automatic identification of an initial preparation (prep) line and an initial path of insertion; the ability of a user to intuitively, haptically adjust the initial prep line and/or the initial path of insertion; the automatic identification of occlusions and draft angle conflicts (e.g., undercuts); the haptic simulation and/or marking of occlusions and draft angle conflicts; and coordination between design output and rapid prototyping/milling and/or investment casting.

A freeform fabrication method for making a three-dimensional food object from a design created on a computer, including: (a) providing a support member by which the object is supported while being constructed; (b) operating a material dispensing head for dispensing a continuous or intermittent strand of food composition in a fluent state; this food composition including a liquid ingredient and a primary body-building food material and the dispensed food composition having a rigidity and strength sufficient for permitting the food composition to be built up layer by layer into a three-dimensional shape in a non-solid state; and (c) operating control devices for generating control signals in response to coordinates of the object design and controlling the position of the dispensing head relative to the support member in response to the control signals to control dispensing of the food composition to construct a 3-D shape of this object. The method optionally includes an additional step of applying a heat treatment to the 3-D shape after this 3-D shape is constructed. This method can be used to form an intricate shape of a cake mix, which is then baked in an oven. It can also be used to form a custom-designed decorative shape on the top surface of a pre-made cake.

A method is presented for rapidly making and delivering directly to a consumer a full upper and/or lower denture on the basis of contemporaneous digital image information laser scanned from the person's oral cavity after all respective upper and/or lower teeth have been removed, the delivery of the denture occurring substantially contemporaneously with the creation of the contemporaneous digital image information and optionally including and based on archived digital image information laser scanned from the person's oral cavity before all respective upper and/or lower teeth have been removed and digitally stored. According to which this contemporaneous digital image information and archival digital image information of the oral cavity is converted, by means of what is called the rapid prototyping technique and thus with a processing step (20) and a combination of an optional laser scanning step (18) solely for archiving the oral cavity when upper and/or lower teeth are present and a repetition of the laser scanning step (18) at a subsequent time when upper and/or lower teeth have been removed, a pre-selected block of plastic is used in a processing step (26) at a remote rapid modeling facility for receiving and processing digital information to form the block of plastic or like material into a denture of which at least a part is formed to substantially perfectly fit in juxtaposed relationship to the corresponding gums of the consumer. At least, pre-selected outer or non-juxtaposing is selected for manufacture of the denture using an arbitrary archived digital image not derived from the consumer's oral cavity image but selected by the consumer for its style, cosmetic characteristics, for example, color of teeth, size and variety of teeth, and/or perceived suitability.

This invention relates to rapid prototyping systems, specifically, a composition for a release film comprising one or more base materials selected from the group consisting of silicone, polycarbonate, polyethylene, and polypropylene; and one or more free-radical inhibitors.

The invention refers to a method for calibrating the control of a radiation device producing electromagnetic radiation or particle radiation in a rapid prototyping system. The method comprises the steps of arranging a calibration plate at a defined position in the rapid prototyping system, the calibration plate having an upper side with a first region and a second region separate from the first region, the first region being provided with optically detectable reference marks and the second region having a medium which is sensitive to the radiation of the radiation device, producing a test pattern by exposing said medium to said radiation at predetermined desired positions defined by position coordinate data, digitizing the first region of the calibration plate with the reference marks thereon and the second region of the calibration plate having the test pattern, comparing the digitized reference marks and the digitized test pattern and calculating and providing correction data for the control of the radiation device on the basis of the comparison.

There is provided a system for fabricating at least a portion of a denture. The system includes a three-dimensional scanning device for scanning a surface of a denture template, and a computer-readable medium including a computer program for receiving data from the scanning device, creating a 3-dimensional model of the surface, and optionally modifying the 3-dimensional model and/or adding features to the 3-dimensional model. The system also includes a fabricator for creating the at least the portion of the denture, from a selected material, based on the 3-dimensional model. The fabricator may be a device including a lathe, or a rapid prototyping machine. There is also provided a method for fabricating at least a portion of a denture.

A stereolithography apparatus having a resin vat with resupply containers in one-way flow communication and a leveling container in two-way flow communication, an automatic offload cart to remove and replace build support platforms, an elevator assembly for supporting and releasably retaining a build platform removably attached to the stereolithography apparatus frame such that elevator forks supporting the build platform can be released into the vat and removed from the stereolithography apparatus with the vat, and a recoater assembly and recoater blade for mapping the resin surface in the vat and applying a fresh coating of resin to a cross-section being built in the vat.

Disclosed is a method for smoothing the surface of an object built from a polymeric or wax material using a layered manufacturing rapid prototyping technique. After the object is built it is exposed to a vaporized solvent such as in a vaporizer for an exposure time sufficient to reflow the object surface. A solvent is chosen based on its ability to transiently soften the material which forms the object, and thereafter evaporate off the object. The object is removed from the solvent and allowed to dry, producing a smooth finished part.

The present invention relates to novel polymeric compositions that exhibit Reverse Thermal Gelation (RTG) properties for use as Support Materials (SM) in the manufacture of three-dimensional objects. These polymers are Temperature Sensitive Polymers that respond with a significant change of properties to a small change in temperature. Temperature Sensitive Polymers exhibit cloud point (CP) or lower critical solution temperature (LCST) in aqueous solutions. Water-soluble Temperature Sensitive Polymers are chosen to give low viscosity liquid at low temperature when dissolved in water and by that to permit easy dispensing at low temperature. Raising the temperature above their gelation temperature (T_gel) will result in solidification of the composition. At its gel position the material has favorable characteristics as a support and building material. The gel layers have the appropriate toughness and dimensional stability to support the model layers during the building process. After the building process is completed the gel can be cooled down to a temperature below its T_gel so the gel can liquefy and be removed easily by rinsing with water.

This invention relates to processes and systems of rapid prototyping and production. Its features includes flexible material deposition along tangential directions of surfaces of a part to be made, thereby eliminating stair-shape surface due to uniform horizontal layer deposition, increasing width of material deposition to increase build up rate, applying the principles of traditional forming/joining processes, such as casting, fusion welding, plastic extrusion and injection molding in the fabrication process so that various industrial materials can be processed, applying comparatively low cost heating sources, such as induction heating and arc-heating. Additional features include varying width and size of material deposition in accordance with geometry to be formed and applying a differential molding means for improved shape formation and surface finishing.

The present invention relates to a method for producing a part (108, 200, 300), comprising the following steps:

• • a) applying a first flat layer consisting of a support material (102, 202, 302), to a construction platform (101, 201, 301),
  • b) introducing at least one recess (103, 203, 303) into the support material (102, 202, 302),
  • c) filling the recess (103, 203, 303) with a construction material (104, 204, 304),
  • d) applying a further layer of support material (102, 202, 302),
  • e) repeating steps b) through d) until completion of the part (108, 200, 300), and
  • f) removing the support material (102, 202, 302).

This method is to provide a manufacturing method and a device that combine the advantages of the layerwise construction (rapid prototyping) with the advantages of machining (e.g. high-speed cutting) and particularly permit the production of sharp-edged contours.

Furthermore, the present invention relates to a device for carrying out the method.