The warp is the high-strength direction due to the straightness of the fibers. As with any fundamental skill, the basic fundamentals need to be mastered before you gain the ability and confidence to perform more advanced maneuvers. Warp is the longitudinal fibers of a fabric. On "Go!" I ask you, what part of the body allows you to make lay-ups? Remove this trapped air by covering the prepreg with a perforated release film and a breather ply, and apply a vacuum bag. The maximum time allowed for material at room temperature before the material cures is called the mechanical life. Materials that are stored incorrectly can begin to cure before they are used for a repair. [Simple Scoring Moves] - Duration: 8:57. As the temperature approaches the final cure temperature, the rate of reaction greatly increases, and the resin begins to gel and harden. An aircraft repair’s cure cycle starts with material storage. Freezers must be capable of maintaining 0 °F or below; most household freezers meet this level. Examples of balance laminates are presented in Figure 6. Laminates co-cured over honeycomb core may have distorted plies that have dipped into the core cells. Prepreg material is temperature sensitive. If usage is small, a chest-type freezer may suffice. Use a breather and a vacuum bag to compact the repair. There are 2 basic types of lay ups’ Shot off of 2 feet, Power Lay Up. Do not forget to remove the backing material when stacking the plies. Layups. Feet are perpendicular to the baseline, both hands on the ball until the release. Put a piece of breather material between the fabric and the edge breather to provide an air path. Some resin systems have a dye added to aid in seeing how well the material is mixed. Both methods are illustrated in Figures 3 and 4. Prepreg is a fabric or tape that is impregnated with a resin during the manufacturing process. Consult the maintenance manual to determine if bleeder plies are required for the repair. Place an edge breather cloth next to the vacuum bag sealing tape. A warp clock is used to describe direction of fibers on a diagram, spec sheet, or manufacturer’s sheets. Parts can also be pressed together with clamps. bank shots). Two lines. Through purposeful basketball drills, focus on finishing in diverse ways. No matter what else you do, you must keep your eyes on the prize. The resin system is already mixed and is in the B stage cure. A ball handling program that caters to your skill level and changes as you improve... What does improving your ball handling actually look like? You are shooting the ball in a hook motion. Epoxy resins, like all multipart materials, must be thoroughly mixed. We sometimes use the word "layup" and "finishing" interchangeably. Composite materials can be used to structurally repair, restore, or enhance aluminum, steel, and titanium components. As the game has evolved through the years, so has the layup. The resin should be uniformly distributed over all of the fabric. When an autoclave is used for curing parts, make sure that the pressure in the autoclave is relieved before the door is opened. All frozen prepreg materials need to be stored in moisture-proof bag to avoid moisture contamination. Regular: ... Keeping two hands on the ball and jumping off of two feet keeps the player in control and in a stronger, more balanced position. Many high-strength prepregs in use today are no-bleed systems. ±45°, 0°/90°, ±45°, 0°/90°, the last type that is used is called the over hand shot. Smoke can burn or poison you when the resin overheats. Switching. There are mainly two types of layups the over arm and the under arm. The amount of resin bled off depends on the size and number of holes in the perforated release film, the thickness of the bleeder/ breather cloth, the resin viscosity and temperature, and the vacuum pressure. These prepregs contain exactly the amount of resin needed in the cured laminate; therefore, resin bleedoff is not desired. Copy the repair ply information to a piece of repair material that is large enough to cut all plies. The autoclave uses vacuum and positive pressure to consolidate the plies and to provide a path for air and volatiles to escape. Cure prepregs at an elevated cure cycle; the most common temperatures used are 250 °F and 350 °F. After the material is thawed and removed from the backing material, cut it in repair plies, stack in the correct ply orientation, and vacuum bag. The recommended time at room temperature to complete layup and compaction is called the handling life. A cure cycle is the time/temperature/pressure cycle used to cure a thermosetting resin system or prepreg. The breather allows the air to escape. - Duration: 11:50. Basketball features constant motion, and contact between opposing players is unavoidable, but significant contact that is the fault of illegal conduct by one opponent is a foul against that player. Many repair facilities cut the material in smaller kits and store them in moisture-proof bags that thaw quicker when removed from the freezer. The above 4 types of layups are probably the most utilized and most basic. It is critical during a repair operation to replace each damaged ply with a ply of the same material and orientation or an approved substitute. A clean room for repair layup would be best, but if a clean room is not available, the prepreg should be protected by storing them in bags or keeping them covered with plastic. Pour the resin onto the fabric. Free Throw. Horizontal (or edge) bleedout is used for small room temperature wet layup repairs. Principal advantages derived from the co-cure process are excellent fit between bonded components and guaranteed surface cleanliness. the under arm is mainly known as the finger roll. Before starting the layup, cover the unprotected sides of the prepreg with parting film, and clean the area being repaired immediately before laying up the repair plies. 0°/90°, ±45°, 0°/90°, ±45°. Objectives: Students will be able to Demonstrate the composite layup process Explain the role of matrix and resin The layup is considered the most basic shot in basketball. Excessively high temperatures cause the material to begin curing, and excessively low temperatures make the material difficult to handle. Place and seal the vacuum bag, and apply vacuum to the bag. Your legs? You will not be able to shoot a reverse layup like Michael Jordan if … Mix more than one batch if more material is needed than the maximum batch size. The holes in the release film allow air to breath and resin to bleed off over the entire repair area. All prepreg material should be protected from dust, oil, vapors, smoke, and other contaminants. You must remove the prepreg from the freezer and let the material thaw, which might take 8 hours for a full roll. Air that is put into the resin or not removed from the fabric also reduces the repair strength. Place a piece of solid parting film on the table. You should aim for 10 layups, or see how many baskets you can make within a 30-second time limit. Since many resin systems do not have a dye, the resin must be mixed slowly and fully for three minutes. Cool down temperatures are typically below 5 °F per minute. A typical co-cure application is the simultaneous cure of a stiffener and a skin. Have both feet hit the ground at the same time. - pull-up jump shots off the dribble (e.g. The edge breather should be 1–2 inches wide. As a result, compressive stiffness and strength can be reduced as much as 10 and 20 percent, respectively. Both types of glaciers form through the slow accumulation and compaction of snow into dense glacial ice. This technology has often been referred to as a combination of metal bonding and conventional on-aircraft composite bonded repair. There should only be three or four dribbles total when going to the elbow and back. These are also referred to as "Power Layups." Refrigerators are used to store laminating and paste adhesives and should be kept near 40 °F. In this continuous drill, players will make a long pass down the floor and then sprint … Hook Shot This type of shot is more difficult to do. The area should be at least 4 inches larger than the material to be impregnated. The next player on that end gets the rebound and speed dribbles up the other side. Dry the part, remove the damage, and taper sand the edges of damaged area. In order to ensure success of developing my skill acquisition, I have chosen to focus on two types of practice; part and drill. When it comes to testing for covid-19, there are two types, antigen and PCR. Layups - Two lines. It is frequently used for removable aircraft parts, such as flight controls, access panels, etc., and when a part’s geometry and/or the repair location makes it very difficult to properly vacuum bag and seal the area in a vacuum. Vacuum bag molding is a process in which the layup is cured under pressure generated by drawing a vacuum in the space between the layup and a flexible sheet placed over it and sealed at the edges. Do not mix large quantities of quick curing resin. Any volatile contaminants, such as air and/or water, are drawn out of the laminate with vacuum during this time. The curing oven and heat bonder uses a vacuum bag to consolidate the plies and to provide a path for air and volatiles to escape. Store the prepreg materials in a sealed, moisture proof bag. The typical storage temperature is between 40 °F and 80 °F for most epoxy resins. Typical layup form involves grasping the ball with two hands, raising it in front of your face and banking it off the backboard, which all occurs while you’re in motion. THE DIFFERENT TYPES OF LAYUPS IN BASKETBALL FOLLOW ALL OF THESE! Clamps (e.g., C-clamps and spring clamps) are used for pressing together the edges of components and/or repair details. A vacuum is applied and a squeegee is used to remove air and excess resin to the edge breather. During the wet layup process, a dry fabric is impregnated with a resin. Place a piece of perforated release film on top of the prepreg material, a bleeder ply on top of the perforated release film, and a solid release film on top of the bleeder. Carbon and Kevlar® dry fabric could also be used with a wet layup resin system. Honeycomb sandwich assemblies commonly use a secondary bonding process to ensure optimal structural performance. This prevents the aging of the epoxy. Controlled bleed allows a limited amount of resin to bleed out in a bleeder ply. The technician puts a mold release compound or a release film on a caul plate so that the plies will not adhere to the caul plate. The sheet should be 2-inches larger than the material to be impregnated. With only two balls on each end, this is a much more difficult goal to make than if every player has a ball. The bleeder can only absorb a limited amount of resin, and the amount of resin that is bled can be controlled by using multiple bleeder plies. The curing process is accomplished by the application of heat and pressure to the laminate. The handling life is shorter than the mechanical life. A putback of a missed shot is also technically a layup. Some resin systems require storage below 40 °F. Weigh the fabric to find the amount of resin mix that is necessary to impregnate the material. the first two players from each end start the left-handed speed dribble and shoot the left-handed lay-up. Air enters into the mixture if the resin is mixed too fast. There are a few things to keep in mind when shooting this: Jump off of one foot and land on two. Envelope bagging is a process in which the part to be repaired is completely enclosed in a vacuum bag or the bag is wrapped around the end of the component to obtain an adequate seal. Layups can be broadly categorized into two types: the underarm and the overarm. A vacuum bag can be used to consolidate the plies and to provide a path for air and volatiles to escape. Compared to squeegee impregnation, this process reduces the level of entrapped air within the fabric and offers a more controlled and contained configuration for completing the impregnation process. Wet layup repairs are often used with fiberglass for nonstructural applications. Thermocouples are placed near the repair, and they provide temperature feedback for the heating device. The laminate is compacted by applying pressure, usually vacuum (atmospheric pressure); autoclaves apply additional pressure, typically 50–100 psi. [Figure 2] The maximum time allowed for storing of a prepreg at low temperature is called the storage life, which is typically 6 months to a year. I think you make lay-ups with your eyes. The two things all layups do have in common: (1) All layups are shots close to the basket (2) All layups are worth two points How to Do a Layup (6-Steps) 1. Spring clamps can be used in applications where resin squeeze-out during cure would require C-clamps to be retightened periodically. Use a piece of thin plastic, and trace the size of each repair ply from the damaged area. Another method of pressure application for oven cures is the use of shrink wrapping or shrink tape. Several different versions of the layup are around today. The part is impregnated with resin, and the vacuum bag is placed over the repair. A personal foul is the most common type of foul. Material that exceeds the mechanical life needs to be discarded. No bleeder is used, and the resin is trapped/sealed so that none bleeds away. [Figure 5]. The part temperature is most important for a correct cure, so thermocouples are placed on the part to monitor and control part temperature. Co-curing often results in poor panel surface quality, which is prevented by using a secondary surfacing material co-cured in the standard cure cycle or a subsequent fill-and-fair operation. Composite Honeycomb Sandwich Repairs Part 1, Composite Honeycomb Sandwich Repairs Part 2. An elevated temperature cure repairs can be accelerated by the orientation is defaulted to zero as temperature... In place with tacky tape and a vacuum bag will be used to store laminating and paste adhesives and be! 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