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319 results about "Multi material" patented technology

Enhanced material detection and frequency sweep analysis of controlled substances via digital signal processing

A system for material detection and identification includes an interface configured to access a material database associating each of a plurality of materials with a resonance frequency and one or more transmission parameters; an RF transmitter configured to, for each material of at least a subset of the plurality of materials in the material database transmit into an environment an RF signal the resonance frequency for the material using the one or more transmission parameters; an RF receiver configured to receive a response signal from the environment; and a processor configured to analyze the response signal for resonance characteristics that indicate a presence of the material and identify the material to a user if the presence of the material is indicated by the resonance characteristics.
Owner:QUANTUM IP LLC

Composite material additive manufacturing method and equipment based on size error compensation

The invention provides a composite material additive manufacturing method and device based on size error compensation, and the method comprises the steps: selecting the number, type and combination mode of materials needed by each layered structure strip according to the material performance of a prepared component and the local thermodynamic performance and mechanical performance of the component; all strips of the single layered structure are laid at the same time or in each round, so that the single layered structure is formed; each strip is made of a single type of material or is formed by laminating and compounding a plurality of single type of materials, and the self-adaptive laying method is executed according to data of various sensors in the laying process and data of a detection mechanism after laying; and the steps are repeated, and the strips are laid layer by layer according to the layer sequence of the layered structure till the component is formed. According to the method, through effective combination of additive manufacturing modes of multiple fiber composite materials, multiple materials are combined and then laid, and it is ensured that the distribution of fibers and the infiltration effect of a matrix reach the ideal state.
Owner:EAST CHINA UNIV OF SCI & TECH

Multi-material localized printing device and method based on selective laser melting technology

The invention discloses a multi-material localized printing device and method based on a selective laser melting technology. The device comprises a laser printing head, a printer shell, a groove type lifting printing table, a powder storage mechanism, a powder feeding execution mechanism, a powder scraping mechanism and a regional powder covering mechanism. The groove type lifting printing table is arranged on the printer shell; the laser printing head is located above the groove type lifting printing table. The powder storage mechanism is located on the side of the groove type lifting printing table. The powder feeding executing mechanism is located below the powder storage mechanism. The powder scraping mechanism is located behind the groove type lifting printing table. The regional powder covering mechanism is located in front of the groove type lifting printing table. Various materials can be selected during one-time forming machining, material conversion in the forming machining process is simpler and faster, multi-material combination can be achieved in different areas of the same-layer structure in the horizontal direction, and multi-material combination can be achieved in different areas or the same area of the different-layer structure in the vertical direction; and the forming requirements of multi-material integrated parts are effectively met.
Owner:NORTHEASTERN UNIV CHINA

Carbon-carbon composites, carbon-ceramic composites and anti-oxidation coatings, aircraft brake discs

The present invention relates to the field of carbon-carbon composite materials, and discloses a carbon-carbon composite material, a carbon-ceramic composite material, an anti-oxidation coating, and an aircraft brake disc. The anti-oxidation coating comprises components by weight: 150 parts of an aqueous solution of aluminum dihydrogen phosphate with a content of 37-43%, 70-130 parts of tin powder, 60-120 parts of silicon carbide powder, 15-60 parts of glass powder with a softening point of 600°C-900°C, 15-50 parts of kaolin, and 10-30 parts of boron carbide powder. The anti-oxidation coating can form a coating with good thermal stability and chemical stability by accurately proportioning and mixing a plurality of materials, and can protect the carbon-carbon composite material from oxidation under a high temperature environment.
Owner:YOUCAITEC MATERIAL CO LTD

Control method for injection molding machine, manufacturing method for injection molded article, and injection molding system

To provide an injection molding technique capable of achieving stable molded article quality even under variation in material properties.SOLUTION: This control method for a manufacturing device is implemented by a control device. The manufacturing device includes an injection molding machine and a mold attached to the injection molding machine. The method comprises: a collection step for collecting, from a plurality of sensors provided in the manufacturing device, multiple items of process data measured during first injection molding; an acquisition step for acquiring, on the basis of the process data, a plurality of parameters relating to a plurality of material characteristics of a resin material used for injection molding; and a control step for setting, on the basis of the plurality of parameters, molding conditions for second injection molding after the first injection molding.SELECTED DRAWING: Figure 3
Owner:CANON KK

Integrated joint sealing system

An integrated joint sealing system that is incorporated into the edges of a sheathing panel, which also may have a factory bonded weather resistive barrier. The edges of each panel are configured as a shiplap joint, or similarly functioning joint, that is present as either an overlap or underlap on each of the four panel edges. The arrangement of the joints are such that one edge will have an overlap and the opposite edge will have an underlap. A flexible gasket material (or materials) is factory applied to one or both sides (underlap and / or overlap) of the shiplap joint. This flexible gasket material, when overlapped with adjacent shiplap panels, provides a weather resistive seal to limit both water and air penetration.
Owner:LOUISIANA PACIFIC CORP

System and process for sorting and recovery of recyclable materials from mixed municipal solid waste

A system and process for sorting and recovery of recyclable materials, and in particular, sorting and recovery of recyclable materials from mixed waste comprising municipal solid waste in a materials recovery facility or “MRF” are provided. Advanced technology and machinery are integrated into a multi-step system and process that are designed to treat contaminated MSW streams to meet or exceed minimum material quality specifications while also reducing and minimizing headcount of sorter personnel. Because the mix of materials in MSW can be so varied and unpredictable, the system and process are designed to effectively sort and recover desired materials from MSW streams having a variety of material compositions.
Owner:WM INTELLECTUAL PROPERTY HOLDINGS LLC

Wind noise prevention and shock absorption special glass composite structure and manufacturing process

The invention discloses a wind noise prevention and shock absorption special glass composite structure and a manufacturing process, and the wind noise prevention and shock absorption special glass composite structure comprises two outermost tempered glass bodies, a plurality of grooves, a honeycomb-shaped inner sandwich, a shape memory alloy frame body I and a shape memory alloy frame body II, first clamping cavities are formed between the first shape memory alloy frame body and the buffering parts and between the second shape memory alloy frame body and the buffering parts, second clamping cavities are formed between the two buffering parts and the adjacent reinforcing bodies, and third clamping cavities are formed between the two reinforcing bodies and the adjacent laminated glass layers; various materials and structures of the outermost tempered glass body, the laminated glass layer, the buffer part, the reinforcing body, the honeycomb inner sandwich and the shape memory alloy frame body are compounded to form a multi-layer synergistic wind noise prevention and shock absorption system, and the wind noise prevention and shock absorption performance is remarkably improved due to the special shapes and distribution of the second clamping cavity, the third clamping cavity, the through concave body and the elastic pressing body.
Owner:皓晶控股集团股份有限公司

Method, system and storage medium for assisting material synthesis using multimodal large models

The present invention discloses a method, system and storage medium for assisting material synthesis using a multimodal large model. The method establishes a corresponding relationship between the embedding of material raw materials and processing processes and the embedding of material performance by constructing a multimodal large model of material raw materials and processing-performance. In the application stage, the method can realize three reasoning functions: reasoning about material performance based on material raw materials and processing processes, inferring the required material formula based on target performance, and judging the credibility of a given formula. The method and system provided by the present invention significantly improve the efficiency of material formula development while ensuring the reliability of the formula. The present invention is applicable to the formula development of various materials such as rubber, plastic, and coatings, and has important practical value.
Owner:SHANGHAI YIMA PINGCHUAN INTELLIGENT TECHNOLOGY CO LTD

Additive manufacturing system and additive manufacturing method for multi-material powder

The invention discloses an additive manufacturing system and method for multi-material powder, the additive manufacturing system comprises a basic part, a nozzle system and a first driving part, powder of multiple materials is sprayed to a forming base according to needs, and manufacturing of a multi-material structure product is achieved. According to the requirement for spraying of different material powder in the actual manufacturing process, the first driving piece is connected with the multiple nozzle pieces at the same time and drives the nozzle pieces to move, spraying of the different material powder is accurately controlled, the manufacturing precision and quality of products are improved, and the nozzle system can reciprocate in the length direction and the width direction of the forming foundation; the manufacturing time is shortened and the production efficiency is improved. The channel communication condition of the nozzle piece and the moving path of the nozzle system are flexibly adjusted, the variable manufacturing requirements are met, and the production and manufacturing reliability is higher.
Owner:EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH +1

V-method precise resin sand mold casting process method suitable for gray iron or ductile iron

The invention relates to the technical field of casting mold cooling capacity regulation and control and material-process collaborative optimization, in particular to a V-method precise resin sand mold casting process method suitable for gray iron or ductile iron. The invention relates to a V-method precise resin sand mold casting process suitable for gray iron or ductile iron, which comprises the following steps: firstly, preparing gradient function modified resin sand, mixing spherical reclaimed sand with various materials such as novolac epoxy resin, and carrying out multi-step stirring and surface modification treatment; an intelligent temperature control sand box is prepared, and then the steps of forming negative pressure curing, composite inoculation treatment, vacuum differential pressure pouring, intelligent cooling control and the like are carried out; in the process, special materials and structures such as a core-shell curing agent, a double-layer film and a core-spun yarn are used, and precise process control is achieved. According to the process, through material innovation and process optimization, the sand mold strength and stability are improved, and casting defects are reduced; the casting quality is improved through the precise temperature control and pouring mode, and the mechanical property is enhanced through composite inoculation; the method is environment-friendly and economical, reduces the cost, improves the yield and has a wide application prospect.
Owner:JIAHE ZHONGHE CASTING

Sorting of materials based on identified signatures

A system and method for classifying and sorting a plurality of materials utilizing a machine learning system in order to identify signatures of each of the materials corresponding to elemental compositions specific to each of the materials, which are then sorted into separate groups as a function of such identified signatures.
Owner:SORTERA TECH INC

Mixing mechanism in firework explosive barrel

The utility model discloses a firework burning explosive type medicine barrel internal mixing mechanism which comprises a first-stage conveying belt and a second-stage conveying belt, a fixing base is arranged between the first-stage conveying belt and the second-stage conveying belt, a rotating motor is fixedly installed on the upper surface of the fixing base, a first-stage rotating wheel is fixedly installed on an output shaft of the rotating motor, and a second-stage rotating wheel is arranged on one side of the first-stage rotating wheel. The first-stage rotating wheel and the second-stage rotating wheel are in transmission connection through a belt, the back face of the second-stage rotating wheel is fixedly connected with a third-stage rotating wheel through a connecting shaft, and eccentric wheels are fixedly arranged at the two exposed ends of the connecting shaft of the second-stage rotating wheel and the third-stage rotating wheel in a sleeving mode. Through the eccentric rotation effect of the eccentric wheel, the vibration platform on the eccentric wheel is driven to vibrate up and down at high frequency, so that the high-frequency vibration mixing can be effectively performed on the explosive in the firework cylinder through the high-speed vibration effect, the comprehensive mixing effect of various materials is realized, and the explosive mixing efficiency and uniformity are improved.
Owner:JIANGXI SUTAO TECHNOLOGY CO LTD

Heterogeneous material welding reliability characterization method applied to brush type sealing structure

The invention relates to a nanoindentation and reliability characterization technology thereof, in particular to a heterogeneous material welding reliability characterization method applied to a brush type sealing structure. By means of the nanoindentation technology, mechanical properties such as hardness, elasticity modulus and plastic deformation of the welded joint are obtained by analyzing indenter deformation and indentation morphology. Meanwhile, indentation testing is carried out on different positions of the brush type sealing welding joint, and the performance comparison condition of all areas of the welding joint is obtained. Compared with a traditional reliability characterization means, the device and the method have the advantages that various areas of the heterogeneous welding joint including a base material, a heat affected zone and a fusion zone are tested under the nanoscale, various material performance indexes such as hardness, elasticity modulus and plastic deformation are measured at the same time, and the device and the method have high-precision and multifunctional testing capacity and are suitable for popularization and application. And moreover, the joint cannot be damaged or other properties cannot be influenced, and compared with a room-temperature stretching result, the nanoindentation technology has relatively high reliability and repeatability, and an accurate characterization result is obtained.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

High-strength cold forming composite sealing head for single crystal furnace

The utility model belongs to the field of single crystal furnace manufacturing, particularly relates to a high-strength cold forming composite end socket for a single crystal furnace, and aims to solve the problems that the conventional end socket for the single crystal furnace is difficult to simultaneously meet the requirements of high temperature resistance, high pressure resistance and mechanical strength, a furnace body and the end socket are inconvenient to align when the end socket is mounted, and the cost is high. In order to solve the problem that the welding position of the end socket is not accurate due to the fact that the welding position of the end socket is not accurate, the utility model provides the following scheme that the end socket comprises an end socket body, a plurality of connecting lugs which are uniformly distributed are welded on the circumference of the end socket body, and chamfers are arranged on the sides, close to the end socket body, of the connecting lugs. The sealing head body is made of various materials and used for installing and positioning the sealing head body, so that the sealing head body is more convenient and faster to install, the sealing head body not only has excellent high-temperature resistance and corrosion resistance, but also has the characteristics of high strength, high toughness, wear resistance and oxidation resistance, the service life of the sealing head is greatly prolonged, and the safety of the sealing head is greatly improved.
Owner:YIXING HOKKAI HEAD PLATE

Vertical stirring device for ultra-deep and large-volume flowing muck

The utility model relates to a vertical stirring device for ultra-deep and large-volume flowable muck. When a traditional excavator conducts mixing and stirring operation, certain radian exists, full covering of muck is difficult to achieve, and due to the fact that the one-time excavation volume of a muck hopper is large, even mixing is difficult to achieve, and the mixing efficiency is low. The vertical stirring device is arranged above a slag pool and comprises a supporting mechanism, a vertical stirring mechanism and two longitudinal walking mechanisms, the longitudinal walking mechanisms are arranged at the upper ends of the two longitudinal side walls of the slag pool respectively and can longitudinally move along the slag pool, the two ends of the supporting mechanism are arranged above the longitudinal walking mechanisms, the vertical stirring mechanism is suspended on the supporting mechanism, and the vertical stirring mechanism is arranged on the vertical stirring mechanism. And the vertical stirring mechanism can transversely move along the supporting mechanism. According to the utility model, the full coverage of ultra-deep and large-volume muck stirring can be realized, the mixing uniformity of various large-volume materials is improved, and the construction efficiency of mixing and stirring materials such as large-volume flowable muck is further improved.
Owner:CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP

A multi-material, slot-die coating slot die head that mitigates interlayer erosion

The application discloses a multi-material applicable interlayer erosion alleviating multi-layer slot coating slot die, which comprises a first coating module, a second coating module, an upstream temperature control movable block, a downstream temperature control movable block, an upstream flow rate control valve, a downstream flow rate control valve, a central gasket, an upstream slot control block, an upstream slot screw rod, a downstream slot control block and a downstream slot screw rod. When coating is performed, the upstream optical liquid glue passes through the inclined large slot gap between the upstream slot control block and the central gasket to control the flow rate, stabilize the upstream meniscus and the downstream optical liquid glue passes through the vertical small slot gap between the downstream slot control block and the central gasket to control the flow rate and ensure the film surface quality, so that multi-layer coating is realized and stability is ensured. The application meets the coating of various materials, the upstream temperature control movable block and the downstream temperature control movable block are replaced according to the coating layer formed by different materials, so that different manifolds are used to meet the multi-layer film of different materials and the preparation requirements of multi-material multi-layer film are met.
Owner:DALIAN UNIV OF TECH

Multi-functional small punch test device and method

A multi-functional small punch test device and method. The device comprises: a driving unit, a loading unit, a first fixing unit (3), a second fixing unit (6), a third fixing unit, a detection unit, a temperature control unit and a control unit, wherein the driving unit drives, on the basis of a driving signal, the loading unit to move; the first fixing unit (3) fixes the loading unit, and the second fixing unit (6) cooperates with the third fixing unit to fix a circular sample (10); the detection unit performs force displacement detection on a sample to be pressed, the sample to be pressed including a plurality of punch balls; and the temperature control unit executes temperature adjustment control on the basis of a control signal which is output by the control unit. In a single test, mechanical property parameters of materials are determined on the basis of a plurality of sets of data, which has high reliability. In addition, the problem of the monotonous test temperature for existing fixtures can be solved, and the mechanical property parameters of a plurality of materials at a specific temperature can also be acquired in a single test, which prevents repeated tests and significantly improves the test efficiency.
Owner:SUZHOU NUCLEAR POWER RES INST CO LTD

System and method for recommending goods to be recovered from recoverable material using machine learning

A method for identifying and recovering target merchandise from a composite wind turbine blade in which a computing device receives quality level data indicative of quality levels of respective materials included within the turbine blade and merchandise data of a plurality of candidate merchandise that can be recovered from one or more materials of the turbine blade. The computing device determines an expected profitability for each of the plurality of respective candidate items, where the quality rating data for the respective material and the item data for the plurality of candidate items are provided as inputs to the data model such that the data model determines the expected profitability for each of the plurality of respective candidate items. The computing device determines, based on the expected profitability, a recommendation indicating, for a respective material of the turbine blade, one or more target merchandise items to be restored using the respective material. The device delivers the recommendation to another device or recipient such that a recovery of the target item can occur.
Owner:VESTAS WIND SYSTEMS AS

Method for producing a foil composite from several material webs for a valuable or security document

Method for producing a film composite (11) from several material webs (14, 15, 16, 17, 18) for a valuable or security document, wherein each material web (14, 15, 16, 17, 18) is transported along at least one transport roller (21, 22, 23, 24, 25) and fed to at least one lamination device (34), wherein each surface of the material web (14, 15, 16, 17, 18) that is laminated with an adjacent material web (14, 15, 16, 17, 18) is preheated with at least one heating element (29, 30, 31, 32) after leaving the last transport roller (21, 22, 23, 24, 25) and before entering the lamination device (34), and between two In each of the adjacent material webs (14,15; 15,16; 16,17; 17,18) at least one heating element (29, 30, 31, 32) is positioned, through which the surfaces of the adjacent material webs (14,15; 15,16; 16,17; 18) to be laminated are heated.17, 18) are preheated,- wherein the preheated material webs (14, 15, 16, 17, 18) are brought together with a pair of rollers (26) and then fed to the lamination device (34) and laminated together to form the film composite (11), characterized in that two or more material webs (14, 15, 16, 17, 18) are made of a thermoplastic elastomer, and that the respective heating element (29, 30, 31, 32) is controlled with a heating power such that the surface of these material webs (14, 15, 16, 17, 18) is preheated to a temperature that corresponds to or is higher than the glass transition temperature of the respective material web (14, 15, 16, 17, 18).
Owner:BUNDESDRUCKEREI GMBH

Production method of hard and brittle composite material water jet nozzle with metal substrate

The invention relates to a production method of a water jet nozzle made of a hard and brittle composite material with a metal substrate, which comprises the following steps: adopting a composite material formed by combining multiple materials, dividing the nozzle into two parts, namely a substrate and a sheet on the upper surface, and combining in an evaporation or welding manner, and specifically comprises the following steps: S1, selecting a metal substrate material and carrying out surface pretreatment, the metal substrate is made of stainless steel, aluminum alloy or copper alloy metal materials; according to the water jet nozzle, through the innovative composite material structural design, the comprehensive performance of the water jet nozzle is remarkably improved, the composite structure of the metal substrate and the hard and brittle material sheet is adopted, the strength and toughness of the nozzle are improved, and the wear resistance and corrosion resistance of the hard and brittle material are fully exerted; according to the design, the nozzle can bear higher water pressure and laser energy, so that the nozzle has longer service life in high-pressure water jet and water-guided laser processing, and in addition, the stability of the nozzle is effectively improved through the combination of the metal substrate and the hard and brittle material.
Owner:ZHONGYUAN ENGINEERING COLLEGE

Mixing device for household appliance part injection mold

ActiveCN223573498UMulti materialHelical blade
The utility model discloses a material mixing device for a household appliance part injection mold, which comprises a material mixing unit, the material mixing unit comprises a base, the upper surface of the base is fixedly connected with a box body, the middle part of the upper surface of the box body is provided with a cutting assembly, and the upper part of the inner wall of the box body is fixedly connected with a crushing frame; a stirring frame is fixedly connected to the lower portion of the inner wall of the box body, fixing plates are fixedly connected to the two sides of the upper surface of the stirring frame, air cylinders are fixedly connected to the upper surfaces of the fixing plates, connecting plates are fixedly connected to the output ends of the air cylinders, and spiral blades are rotationally connected to the upper surfaces of the connecting plates. According to the material mixing device, various materials can be cut through the cutting assembly, can be mixed in the cutting process, enter the mixing frame through the spiral blades, and can be mixed under the arrangement of the stirring blades, so that the mixing effect can be improved, meanwhile, manual intervention is reduced, and use is convenient.
Owner:SUQIAN JINGCHENG MOLD CO LTD

Evaporation source and method of coating a substrate

An evaporation source (100) for depositing two or more materials on a substrate is described. The evaporation source comprises a first vapor distribution duct (110) extending in a longitudinal direction (V) and having a plurality of first nozzles (111) for depositing a first material onto the substrate, and a second vapor distribution duct (120) extending in the longitudinal direction (V) adjacent to the first vapor distribution duct (110), the second vapor distribution duct having a plurality of second nozzles (121) for depositing a second material onto the substrate. The first and second nozzles comprise a nozzle body (130) having a nozzle channel (132) extending along a nozzle axis (A) and a nozzle opening (131) for releasing a vapor plume towards the substrate. In the first and second nozzles, only the first nozzles (111) are respectively provided with a shield (140, 140') for two-dimensional plume shaping arranged downstream of the nozzle opening (131), the shield being connected to at least one of the first vapor distribution duct (110) and the nozzle body (130) and being configured to limit a maximum opening angle (a) of the vapor plume in both the longitudinal direction (V) and a lateral direction (L).
Owner:APPLIED MATERIALS INC

High-performance uv-cured oca adhesive and film

This invention discloses a high-performance UV-curable OCA adhesive and film. The OCA adhesive comprises the following raw material components by weight: 80-120 parts of prepolymer, 0.01-1 parts of initiator, and 0.01-1 parts of additives. The prepolymer is obtained by mixing monomers and a prepolymer initiator and then carrying out a prepolymerization reaction under UV irradiation. The monomers include at least two of hard monomers, soft monomers, and functional monomers. This invention provides a high-performance UV-curable OCA adhesive and film. The film of this invention maintains high creep recovery and excellent bonding strength while taking into account high-temperature storage modulus (storage modulus > 30 kPa at 80°C). It has advantages such as wide applicability, high bonding strength to various materials, and good flexibility, and has good application prospects.
Owner:JIANGSU SIDIKE NEW MATERIALS SCI & TECH CO LTD +1

Method for preparing a three-dimensional structured hydrogel and use thereof

The application discloses a preparation method and application of a three-dimensional structure hydrogel. The application has the advantages of low manufacturing cost, wide applicable materials, customizable complex three-dimensional structure, high shape fidelity and excellent mechanical properties. Compared with the existing preparation methods of hydrogel soft structure and device, the preparation method comprises three steps of low-temperature printing, low-temperature crosslinking and solvent post-treatment. The obtained hydrogel can contain multiple material components with different crosslinking mechanisms, and does not need specific photopolymerization reaction groups and rheological property adjustors. The obtained hydrogel has a self-supporting three-dimensional structure including overhanging, thin-walled, hollow and high aspect ratio features. The prepared hydrogel structure can withstand repeated bending, stretching and extrusion without breaking, and can still recover to the initial shape after the external force is removed, facilitating the assembly integration and function realization of soft devices and soft robots.
Owner:SHANGHAI JIAOTONG UNIV

A multi-component homogeneous mixing device for the preparation of PEEK composite materials

This utility model discloses a multi-component uniform mixing device for the preparation of PEEK composite materials, comprising: a device body and a stirring assembly; the device body includes a stirring tank, a sealing cover movably mounted on the top of the stirring tank, a base fixedly mounted on the bottom of the stirring tank, and a control box fixedly mounted on one side of the base. In the preparation of PEEK composite materials, the materials are sequentially added through the feeding port and uniformly fed into the feeding hood at the bottom of the sealing cover. After being discharged from the bottom of the feeding hood, they are uniformly dispersed by a dispersing blade rotating on the bottom drive shaft, thereby ensuring the uniformity of dispersion of multiple materials during feeding. Simultaneously, the lower lever at the bottom of the frame-type stirring paddle can also stir and mix the various materials fed to the bottom of the stirring tank after feeding, ensuring the uniformity of mixing before stirring.
Owner:QINGXIEHUAHE (SUZHOU) TECH CO LTD

Multi-material skateboard deck

A skateboard deck with multiple layers constructed from multiple materials is disclosed. Embodiments for design and manufacture are disclosed.
Owner:KARSTEN MFG CORP