| Economics of Fabricating Plastic Preforms by Robotics |
AUG 1985 |
|
| Authors:
E. M. Lundgren; BENDIX CORP KANSAS CITY MO*
|
 | A robotic work cell consisting of a process robot, an automatic weigh feeder, and an existing plastic pill making machine was developed. This work cell was released to Manufacturing September 13, 1983, for production use. Although the work cell was designed and planned for operation in an operator-unattended mode, renovation and rearrangement of the work area made it necessary to assemble the work cell in the Robot Application center Annex ... |
|
| Printed Wiring Board Process Improvement |
JUL 1985 |
|
| Authors:
M. E. Evans; F. L. Gentry; BENDIX CORP KANSAS CITY MO*
|
| This project investigated ways of improving printed wiring board (PWB) fabrication at BKCD. The primary objective of the machining portion was to determine the best manufacturing techniques for rigid double-sided and multilayer printed wiring products, and to identify the process changes required to implement those techniques. Another objective was to improve solder thickness and shelf life by using the hot air leveling process. All process variables were identified and a ... |
|
| CAD-CAM (Computer Aided Design-Computer Aided Manufacturing) Database Management at Bendix Kansas City. |
MAY 1985 |
|
| Authors:
D. R. Witte; BENDIX CORP KANSAS CITY MO*
|
| The Bendix Kansas City Division of Allied Corporation began integrating mechanical CAD-CAM capabilities into its operations in June 1980. The primary capabilities include a wireframe modeling application, a solid modelling application and the Bendix Integrated Computer Aided Manugacturing (BICAM) System application, a set of software programs and procedures which provides user-friendly access to graphic applications and data, and user-friendly sharing of data between applications and users. BICAM also provides for ... |
|
| Robotic Deburring, Part 2, Evaluation of Cutters and Noncompliant Tooling. |
JAN 1985 |
|
| Authors:
R. J. Lambrechts; BENDIX CORP KANSAS CITY MO*
|
| A pneumatic drill motor was rigidly attached to the tool flange of a six-axis robot for deburring studies. Attempts to deburr various details including straight edges, contours, and holes with this robot have produced inconsistent edge breaks on aluminum and stainless steel parts because of noncompliance. Much of the problem lies in the variation of feature location on the parts. Property oriented tooling compliance is essential for effective deubrring and ... |
|
| Robotic Deburring. Part 1. Preliminary Observations. |
APR 1984 |
|
| Authors:
L. K. Gillespie; BENDIX CORP KANSAS CITY MO*
|
| This project was initiated to determine robot technical and economic capabilities for deburring hand size and larger parts. Robots can provide more consistant production levels than those achieved by hand-deburring methods, but unique constraints require special effort to accomplish what humans do easily. This work describes the capabilities and limitations of robotic deburring while 0.25-mm-maximum edge breaks are maintained. |
|
| Analysis of PAPI Foam as an Encapsulant. |
FEB 1984 |
|
| Authors:
D. E. Peterson; BENDIX CORP KANSAS CITY MO*
|
| A high-temperature polymethylene polyphenylisocyanate (PAP) foam was considered for use as an encapsulant. Several filter pack assemblies were manufactured with strain gages installed to measure the strain caused by foam potting on the glass filter seals and housing of the units. Thermocouples also were installed in the units to measure the exothermic effect of the foaming operation. The strain levels were acceptable, and no exothermic effect was observed. Electrical tests ... |
|
| Stress Relaxation of Cellular Silicone Material: 1983, |
FEB 1984 |
|
| Authors:
J. W. Schneider; BENDIX CORP KANSAS CITY MO*
|
| Current data are reported for the long-term (10 years) stress relaxation properties of cellular silicone materials being evaluated at room temperature. Both equilibrium (Union Carbide W-97, random copolymer) and condensation (Union Carbide Y-3976, block copolymer) type base polymers are included. The equilibrium type material used urea as the leachable filler, while the condensation type material used ammonium chloride. Density-thickness combinations were compressed to nominal compressions of 20 and 40 percent ... |
|
| Titanium Fabrication |
DEC 83 |
|
| Authors:
M. G. Ulitchny; BENDIX CORP KANSAS CITY MO*
|
| To meet design requirements, large thick wall extrusions were purchased and machined to a final configuration which weighed less than 10 percent of the original extrusion. This was not an effective use of either material or machine shop resources. Therefore, more efficient methods were evaluated of fabricating large structural components made from various titanium alloys. The areas studied in depth in this activity included resistance spot welding of Ti-6Al-4V; thermal ... |
|
| Over-Aging of Aluminum Alloys |
DEC 83 |
|
| Authors:
M. G. Ulitchny; BENDIX CORP KANSAS CITY MO*
|
| The effects of short-time over-aging on the mechanical properties of aluminum alloys 7050-T736, 7075-T6, 9021-T4, and 9052-F have been evaluated. Test results show that when subjected to a temperature of 600 F for short periods of time, the 7XXX series alloys lose almost all of the tensile strength they received through heat treatment; alloy 9021-T4 loses less of its strength; and 9052-F loses almost none of its strength. Tensile tests ... |
|
| Vapor Degreaser/Ultrasonic Cleaner Solvent Evaluation. |
NOV 1983 |
|
| Authors:
J. K. Phipps; BENDIX CORP KANSAS CITY MO*
|
| An organic solvent with cleaning properties similar to trichloroethylene, but with a lower boiling point and less toxicity, was sought for the vapor degreasing/ultrasonic cleaning of printed circuit boards. For this study, 1,1,1-trichloroethane was investigated because of its similarity in solvency properties and vapor densities. Using either solvent, circuit boards were equal in cleanliness when measured by the evaporative rate analysis techniques. Based on this investigation, 1,1,1,-trichloroethane was found to ... |
|
| Continuous Plasma Treatment and Resin Impregnation of a High-Strength Fiber Material, |
SEP 1983 |
|
| Authors:
J. S. Tira; BENDIX CORP KANSAS CITY MO*
|
| A system was developed for the continuous plasma treatment of fibrous, reinforcing materials used in composites. It was demonstrated that moisture could be removed from Kevlar 49 fibers by passing them through the continuous plasma. Adhesion test results with plasma-treated, unidirectional Kevlar 49/epoxy laminates showed an improvement in adhesion ranging from 1.4 to 3.7 times, as reported by the plasma treatment effectiveness parameter. Limited tensile testing of plasma-treated, resin-impregnated yarn ... |
|
| DEVELOPMENT OF NONDESTRUCTIVE PULL TEST REQUIREMENTS FOR GOLD WIRES ON MULTILAYER THICK-FILM HYBRID MICROCIRCUITS |
JUN 83 |
|
| Authors:
R. J. Blazek; BENDIX CORP KANSAS CITY MO*
|
| thermosonic wire bonding is used to attach 1-mil gold wires to multilayer thick-film hybrid microcircuits manufactured by the bendix corporation, kansas city division for the department of energy. this study was conducted to develop a realistic, nondestructive pull-test limit which would detect unacceptable wire bonds and would be compatible with production processes without applying excessive stress to the wires. the effect of environmental testing on wire bond strength was also ... |
|
| Laser Cutting Plastics, |
APR 1983 |
|
| Authors:
R. A. Van Cleave; BENDIX CORP KANSAS CITY MO*
|
| Laser cutting and drilling various types of plastic and ceramic materials were investigated. Nearly 100 different parts currently use laser technology as part of their production processes. A brief discussion of the 1000 W carbon dioxide laser development activities and typical production of parts is presented. The 1000 W carbon dioxide laser proved to be a reliable, practical, and cost-effective machine tool. (Author). |
|
| Nontoxic Polyimides. |
JAN 1983 |
|
| Authors:
D. R. Jamieson; BENDIX CORP KANSAS CITY MO*
|
| A unique bismaleimide resin, termed APO-BMI, used as a binder in the fabrication of syntactic foam parts, was developed using nontoxic raw materials. APO-BMI may be used in compression molding and mold-to-size applications. (Author, modified). |
|
| Polymeric-Foam Encapsulants for Electronic Devices, |
NOV 1982 |
|
| Authors:
D. J. Fossey; C. H. Smith; BENDIX CORP KANSAS CITY MO*
|
| Different encapsulants for sophisticated electronic packages were developed. Each encapsulant has advantages and disadvantages. The preference of one of the encapsulants to another require tradeoffs. Syntactic epoxy foams have high strengths, but low densities are not obtainable. The chemically blown epoxy and polyurethane foams have the low-density capability along with lower strengths, compared with syntactic foams. Both the epoxy and polyurethane foams limit the reworkability of the electronic packages. (Author, ... |
|
| Bond Properties of Liquid Adhesive, |
OCT 1982 |
|
| Authors:
G. W. Bohnert; BENDIX CORP KANSAS CITY MO*
|
| Studies were conducted on a liquid adhesive used to bond circuit laminates to rigid plastic components. Areas investigated include: adhesive formulation, factors influencing bond strength, laminates cleaning, and automated adhesive application. (Author). |
|
| Shelf-Life Characterization of Adhesives. |
SEP 1982 |
|
| Authors:
J. S. Tira; BENDIX CORP KANSAS CITY MO*
|
| Differential scanning calorimetry and thermal mechanical analysis were used to evaluate the shelf life and storage condition characteristics of several epoxy film adhesives used in electronic applications. (Author). |
|
| Fireset Materials Aging Study, |
JUL 1982 |
|
| Authors:
H. M. Smith; C. Arnold; M. E. Bailey; BENDIX CORP KANSAS CITY MO*
|
| A thermally-accelerated aging study of 10 selected organic materials used in a fireset has been conducted. The study included both quantitative and qualitative gas analyses as well as the measurement of physical properties before and after accelerated aging. The test plan involved single material aging, as well as pairs and larger groups to look for synergistic interactions. The material types tested were epoxies, polyurethanes, polysulfides, silicones, phenolics, polyolefins, and diallyl ... |
|
| Fracture Mechanics of Titanium Alloys |
JUN 82 |
|
| Authors:
M. G. Ulitchny; BENDIX CORP KANSAS CITY MO*
|
| Since the inception of fracture toughness testing of high strength materials at Bendix, a wide range of titanium materials has been studied. Initial studies were carried out on beta extruded Ti-6Al-6V-2Sn. Later studies were conducted on both Ti-6Al-6V-2Sn and Ti-6Al-4V procured as prealloyed and blended elemental powder metal parts and on castings of these same alloys. Results of all technical studies have been reported previously and are summarized in this ... |
|
| Blended Elemental Titanium Alloys |
APR 82 |
|
| Authors:
M. G. Ulitchny; BENDIX CORP KANSAS CITY MO*
|
| The high cost and long delivery time required to procure forged or extruded titanium alloy machining blanks has led to an extensive effort to procure lower cost, nearer net shape, shorter lead time machining blanks. This report discusses the mechanical properties of blended elemental P/M Ti-6Al-4V and Ti-6Al-6V-2x alloys where x is either tin or zirconium. These materials are being considered as alternatives to forgings and extrusions. The properties of ... |
|
| Molybdenum and Its Analyses |
JAN 82 |
|
| Authors:
G. M. Hale; BENDIX CORP KANSAS CITY MO*
|
| The physical and chemical properties of molybdenum are examined, and numerous analytical methods are considered in search of an optimum qualitative test for detecting Mo or its principal alloy TZM in concentrations as low as 0.1 micrograms in 10 ml of solvent, a dilution of 1:100,000,000. A zinc xanthate chemical spot test is recommended as an inexpensive, convenient, and sensitive test, with a detection limit of 0.01 micrograms Mo per ... |
|
| Cracking of 49Fe-49Co-2V Alloy During Machining |
DEC 81 |
|
| Authors:
R. W. Gehman; C. W. Boehning; BENDIX CORP KANSAS CITY MO*
|
| A new lot of 49Fe-49Co-2V alloy exhibited an increased tendency to crack during machining. Analyses were made of failure modes, grain size, hardness, bulk chemistry, and surface chemistry. A sample breaker attachment was used in the scanning Auger microprobe to produce virgin fracture surfaces. A cryogenic chill of the vacuum system was used to reduce the carbon monoxide, dioxide and water vapor adsorption onto the fracture surface. All fracture surfaces ... |
|
| Fiber Reinforcement of Polyurethane Foam. |
NOV 1981 |
|
| Authors:
B. G. Parker; BENDIX CORP KANSAS CITY MO*
|
| The physical properties of both rigid and flexible urethane foams as a function of various fiber fillers were investigated. Varying levels of glass, carbon, and wollastonite fibers were added to two urethane foam formulations. The compressive strength, compressive modulus, flexural strength, and tensile strength of these urethane foam systems were determined. (Author). |
|
| High-Temperature, Bonded Titanium Diboride Sputter Target |
OCT 81 |
|
| Authors:
G. J. Hale; W. G. Gates; BENDIX CORP KANSAS CITY MO*
|
| A high-temperature bonding technique has been employed in the development of an improved sputter deposition target for hard, crack-prone materials such as titanium diboride (TiB(sub 2)). Titanium diboride was bonded to a thin metal backing plate, both materials having a similar linear coefficient of thermal expansion (LCTE) using a high-temperature braze alloy. The thin metal backing plate helps stabilize the movement of the target material during the sputter deposition operation. ... |
|
| Mechanical Properties of Titanium Castings |
SEP 81 |
|
| Authors:
M. G. Ulitchny; BENDIX CORP KANSAS CITY MO*
|
| Cast and hot isostatically pressed (HIP'd) Ti-6Al-4V and Ti-6Al-6V- 2Sn alloys were tested for mechanical properties. Specimens from these alloys were tested in as-received, mill annealed, and solution treated and aged conditions. Results show that tensile strength at least equal to the guaranteed minimum for wrought titanium can be developed using solution treat and age heat treatments. The fracture toughness associated with this strength level is adequate, but tensile ductility ... |
|
| Shelf Life Determination of an Epoxy Resin by Accelerated Aging, |
SEP 1981 |
|
| Authors:
H. M. Smith; BENDIX CORP KANSAS CITY MO*
|
| The aging characteristics of GE-100, a German manufactured equivalent of Shell's Epon 812 epoxy resin, were determined by an accelerated aging study. The changes induced in the GE-100 by thermal aging were observed at five elevated temperatures over a period of three months. Analysis of the data permitted a prediction of the changes expected during shelf storage of the resin at 4.4, and at 25 deg. C. Test samples of ... |
|
| Stress Relaxation of Cellular Silicone Material: 1981, |
SEP 1981 |
|
| Authors:
J. W. Schneider; BENDIX CORP KANSAS CITY MO*
|
| The long-term (10 years) stress relaxation properties of cellular silicone materials at room temperature were evaluated. Both equilibrium (Union Carbide Y-3976, block copolymer) type base polymers were included. Each material was compounded to yield densities of 0.34 and 0.52 g/cm3 for thicknesses of 1.17, 1.52, and 2.54 mm. These density-thickness combinations were compressed to nominal compressions of 20 and 40 percent with nine replicates at each condition. (Author, modified). |
|
| Development of Fracture Toughness Measurement Capability by Ultrasound |
JUN 81 |
|
| Authors:
G. D. Swanson; BENDIX CORP KANSAS CITY MO*
|
| A correlation was developed between ultrasonic wave propagation factors and fracture toughness for Ti-6Al-6V-2Sn alloy. The important microstructural dimension for ultrasonic wave attenuation in this two-phase alloy appears to be the width of the beta phase between the needlelike alpha- phase subgrains. Test specimens must have flat and parallel surfaces and be coupled to the ultrasonic transducer by a thin, uniform couplant layer. Good impedance matching of the specimen-couplant-transducer combination ... |
|
| DEVELOPMENT OF FRACTURE TOUGHNESS MEASUREMENT CAPABILITY BY ULTRASOUND |
JUN 81 |
|
| Authors:
G. D. Swanson; BENDIX CORP KANSAS CITY MO*
|
| a correlation was developed between ultrasonic wave propagation factors and fracture toughness for ti-6al-6v-2sn alloy. the important microstructural dimension for ultrasonic wave attenuation in this two-phase alloy appears to be the width of the beta phase between the needlelike alpha- phase subgrains. test specimens must have flat and parallel surfaces and be coupled to the ultrasonic transducer by a thin, uniform couplant layer. good impedance matching of the specimen-couplant-transducer combination ... |
|
| Aluminum Alloy Welding and Stress Corrosion Testing |
APR 81 |
|
| Authors:
W. G. Gates; E. Jimenez; BENDIX CORP KANSAS CITY MO*
|
| This study was performed to evaluate the weldability, strength, and corrosion resistance of four high-magnesium, 5XXX aluminum alloys welded to 6061-T6 aluminum. No restrained weld cracks or stress corrosion cracking problems were detected. Joint strengths in excess of 230 MPa were achieved with all alloy combinations. |
|
| Software Documentation for Compression-Machine Cavity Control, |
APR 81 |
|
| Authors:
R. H. Floersch; BENDIX CORP KANSAS CITY MO*
|
| A new system design using closed loop control on the hydraulic system of compression transfer presses used to make filled elastomer parts will result in improved accuracy and repeatability of speed and pressure control during critical forming stages before part cure. The new design uses a microprocessor to supply set points and timing functions to the control system. Presented are the hardware and software architecture and objectives for the microprocessors ... |
|
| Low-Temperature Curing of a Nitrile-Epoxy Adhesive. |
APR 81 |
|
| Authors:
J. S. Tira; BENDIX CORP KANSAS CITY MO*
|
| The adhesive strength and glass transition temperature epoxy nitrile adhesive (FM 123 5) were correlated with cure times at 85 deg. C and above. The effect of moisture on adhesive cure and strength was tested. With a 3-hour cure at 85 deg. C, lap shear strength met specification requirements. Placing the adhesive in a desiccator for 30 minutes produced excellent room temperature shear strengths. Preconditioning (removal of moisture) was critical ... |
|
| Properties of Polystyrene Bead Foam as an Encapsulant for Electronic Packages. |
APR 81 |
|
| Authors:
D. J. Fossey; BENDIX CORP KANSAS CITY MO*
|
| Polystyrene bead foam (PSBF) was evaluated as an encapsulant for electronic packages. Various properties of PSBF pertinent to the expected environmental conditioning of a prototype electronic package were determined and evaluated for their effects on individual electronic components, within the package. Properties evaluated included: mechanical, thermomechanical, shock and vibration effects, moisture penetration, and electrostatic voltage effects. (Author, modified). |
|
| Parylene Coating of Syntactic Composites, |
NOV 80 |
|
| Authors:
A. H. Schloman; BENDIX CORP KANSAS CITY MO*
|
| A manufacturing process developed for parylene coating syntactic parts has resulted in several improvements. Thin edges have been strengthened, which minimizes breakage during the manufacturing process and subsequent assembly; part and surface toughness has been improved; the coefficient of friction during assembly has been reduced; and the bonding of the pads, shoehorn, and clips has been enhanced. Improvements in the tensile strength and flexural strength of the syntactic composite as ... |
|
| Stress Relaxation of Cellular Silicone Material: 1980, |
SEP 80 |
|
| Authors:
J. W. Schneider; BENDIX CORP KANSAS CITY MO*
|
| Bendix Kansas City currently is evaluating the long-term (10 years) stress relaxation properties of cellular silicone materials at room temperature. The cellular structure is formed by using urea as a leachable filler. Both equilibrium (random copolymer) and condensation (block copolymer) type based polymers are included. EAch material was compounded to yield two different densities for several thickness combination. These density-thickness combinations then were compressed to nominal compressions of 20 and ... |
|
| Laser Cutting Plastic Materials, |
AUG 80 |
|
| Authors:
R. A. Van Cleave; BENDIX CORP KANSAS CITY MO*
|
| A 1000-watt carbon dioxide laser has been demonstrated as a reliable production machine tool for cutting of plastics, high strength reinforced composites, and other nonmetals. More than 40 different plastics have been laser cut, and the results are tabulated. Applications for laser cutting described include fiberglass-reinforced laminates, Kevlar/epoxy composites, fiberglass- reinforced phenolics, nylon/epoxy laminates, ceramics, and disposable tooling made from acrylic. (Author). |
|
| Preparation and Properties of an Internal Mold Release for Rigid Urethane Foam. |
AUG 80 |
|
| Authors:
B. G. Parker; BENDIX CORP KANSAS CITY MO*
|
| Internal mold releases which can be added to urethane foam resin were synthesized and evaluated. The use of this type of release agent eliminates the repeated cleaning and recoating of molds, a procedure required with surface- applied mold releases. The internal mold releases investigated are the reaction products of a fatty acid ester, containing an active hydrogen, and a monoisocyanate. The use of an internal mold release resulted in urethane ... |
|
| Corrosion Protection and Galvanic Corrosion Prevention for 7075 Al and Ti-6Al-6V-2Sn Alloys |
JUL 80 |
|
| Authors:
F. A. Clay; BENDIX CORP KANSAS CITY MO*
|
| Sulfuric-acid-anodized and electroless-nickel-plated 7075 aluminum alloy panels successfully passed 96 hours of salt spray testing when galvanically coupled to duplex-annealed Ti-6Al-6V-2Sn alloy panels. Adherent paint deposits were produced on the titanium alloy and electroless nickel surfaces using a wash primer, an epoxy primer, and a urethane paint coating. A painted part survived 35 cycles of alternating salt spray and hot and freezing environments without blistering. A low chloride cutting fluid ... |
|
| Fabrication of a Kevlar Liner Assembly, |
JUL 80 |
|
| Authors:
A. H. Schleman; BENDIX CORP KANSAS CITY MO*
|
| Several liner assemblies were fabricated with Kevlar 49 and epoxy using various wet layup and prepreg processes. A production process, using prepreg material, was developed for fabricating the liner and a wet layup molding process was used to fabricated the Kevlar hat-shaped tunnels. Fabrication of the tunnels using Kevlar prepreg with an autoclave curing process was evaluated. (Author). |
|
| Electrochemical Form Grinding |
JUN 80 |
|
| Authors:
R. W. Stiles; BENDIX CORP KANSAS CITY MO*
|
| Electrochemical form grinding cutting tests were performed on 25 17-4 PH stainless steel bars by a copper resin aluminum oxide wheel formed from a diamond form block. Tests investigated methods of dressing a form into a grinding wheel, nozzle design, optimum machine settings, and tolerance capabilities. The electrolyte was distributed evenly onto the wheel by a form- fitting nozzle, and a mimimum of two passes, rough and finish, were made ... |
|
| Resistance Spot Welding of Ti-6Al-4V Alloy |
JUN 80 |
|
| Authors:
D. M. Jarboe; BENDIX CORP KANSAS CITY MO*
|
| The effects of weld power, electrode force, electrode tip radius, and elapsed time between cleaning and welding on resistance spot welds in Ti-6Al-4V alloy were evaluated. The alloy is weldable by this technique, and a wide latitude can be taken in processing variables. |
|
| SIMULTANEOUS MEASUREMENT OF MULTILAYERED COMPOSITES |
JUN 80 |
|
| Authors:
R. V. Heckman; BENDIX CORP KANSAS CITY MO*
|
| a theoretical treatment of the eddy current problem involving a two- layered conductor laminate is presented for a rectangular cross section coil, with experimental eddy current measurements indicating that a frequency of 1.5 mhz should be used to measure a 6.45 micrometer aluminum conductor, a 0.5 mhz frequency should be used to measure a 50.8 micrometer aluminum conductor, and a frequency of 30 mhz should be used to measure lift-off. ... |
|
| Test Methods for the Dynamic Mechanical Properties of Polymeric Materials, |
JUN 80 |
|
| Authors:
G. K. Baker; BENDIX CORP KANSAS CITY MO*
|
| Various test geometries and procedures for the dynamic mechanical analysis of polymers employing a mechanical spectrometer have been evaluated. The methods and materials included in this work are forced torsional pendulum testing of Kevlar/epoxy laminates and rigid urethane foams, oscillatory parallel plate testing to determine the kinetics of the cure of VCE with Hylene MP, oscillatory compressive testing of B-3223 cellular silicone, and oscillatory tensile testing of Silastic E and ... |
|
| Moisture Penetration Evaluation of Polystyrene Bead Foam as an Encapsulant for Electronic Packages, |
JUN 80 |
|
| Authors:
G. D. Swanson; BENDIX CORP KANSAS CITY MO*
|
| Discs of polystyrne bead foam were used to measure resistance to high-pressure moisture penetration. Densities of 0.2, 0.3, 0.4, 0.5 and 0.6 g/ cm3 processed at various fusion times and temperatures were tested. Only three fusion conditions for 0.6 g/cm3 density were impervious to moisture penetration at 1724 kPa for 24 hours or more. (Author). |
|
| Multilayer Printed Wiring Board Lamination, |
JUN 80 |
|
| Authors:
J. W. Lula; BENDIX CORP KANSAS CITY MO*
|
| The relationship of delamination resistance of multilayer printed wiring boards PWBs made from glass/epoxy material to manufacturing process variables was investigated. A unique quantitative test method developed during this project shows that delamination resistance is highly sensitive to material conditioning, to inner layer surface treatment, and to post-lamination storage conditions, but is relatively insensitive to cure cycle variations. (Author). |
|
| Evaluation of Improved Polyamides, |
JUN 80 |
|
| Authors:
R. J. Hishaw; BENDIX CORP KANSAS CITY MO*
|
| Three polyamides, nylon 11, nylon 12, and a transparent nylon, were evaluated by physical testing, characterization and analytical methods, and injection molding. None of the materials proved to be clearly superior to the others. Results of the evaluation will be used to determine applications for the materials in future production programs. (Author). |
|
| Effect of Preheat on Molding Compounds. |
JUN 80 |
|
| Authors:
J. W. McFarland; BENDIX CORP KANSAS CITY MO*
|
| The effects of preheating the preforms and B-staging the raw materials were investigated for a silicone and a diallyl phthalate thermosetting molding compound. Preheating the preforms caused large increases in the mechanical and electrical properties of both compounds. Heat treating the raw materials had very little effect. Compression-molded specimens were 100 percent stronger than the transfer-molded ones for the silicone and 46 percent stronger for the diallyl phthalate. (Author). |
|
| Phenolic Resin Syntactic Foams, |
JUN 80 |
|
| Authors:
H. M. McIlroy; BENDIX CORP KANSAS CITY MO*
|
| Syntactic foams were prepared from blends of six phenolic resins and carbon microbubbles. The compressive strength of the phenolic resin foams is equivalent to the strength of foams made from a polyimide resin. Ammonia evolved during the cure diffuses rapidly and is not bound by the foam. (Author). |
|
| Simultaneous Measurement of Multilayered Composites, |
JUN 80 |
|
| Authors:
R. V. Heckman; BENDIX CORP KANSAS CITY MO*
|
| A theoretical treatment of the eddy current problem involving a two- layered conductor laminate is presented for a rectangular cross section coil, with experimental eddy current measurements indicating that a frequency of 1.5 MHz should be used to measure a 6.45 m aluminum conductor, a 0.5 MHz frequency should be used to measure a 50.8 m aluminum conductor, and a frequency of 30 MHz should be used to measure lift-off. ... |
|
| Cure Cycle Evaluation for Multilayer Printed Wiring Boards, |
JUN 80 |
|
| Authors:
J. W. Lula; BENDIX CORP KANSAS CITY MO*
|
| The cure cycle for multilayer printed wiring boards (PWBs) made from general-purpose, fire-retardant epoxy/glass (GF) material has been evaluated for the optimum delamination resistance at soldering temperatures. The results show that, for the epoxy resin system used to manufacture multilayer PWBs at Bendix Kansas City, a wide range of cure cycle variations has a minimal effect on delamination resistance. (Author). |
|
Reports by Corporate Author
