摘要:
A method, a system and a product made therefrom including the steps of providing electrically non-conductive pieces or fragments, causing at least a portion of the electrically non-conductive pieces or fragments to become temporarily electrically conductive, combining adhesive which sets when sufficient heat is applied thereto with the temporarily electrically conductive pieces or fragments, and applying voltage across the temporarily electrically conductive pieces or fragments and adhesive combination so as to produce an electric current through the temporarily electrically conductive pieces or fragments which, in turn, generates heat within the temporarily electrically conductive pieces or fragments and adhesive combination.
摘要:
A thermal bond system is provided for bonding a first component that prods heat to a second component that dissipates heat. Carbon or other thermally conductive fiber tows are woven together to define a fabric mesh having first and second opposing woven surfaces. An adhesive bond that is flowable prior to drying is used to wet and cover the first and second opposing surfaces. The adhesive bond extends into interstices formed between adjacent fiber tows.
摘要:
A method and apparatus for forming and consolidating organic matrix composites. An organic matrix composite panel comprising laid-up prepregs is placed between sheets of a susceptor material that is susceptible to inductive heating to form a workpiece. The resulting workpiece is placed within upper and lower dies formed of a material that is not susceptible to inductive heating. An induction coil embedded within the dies is energized and inductively heats the susceptor sheets surrounding the panel. The sheets in turn conductively heat the organic matrix composite panel. A pressure zone between the workpiece and one of the dies is pressurized to form the workpiece to the contour of a forming surface on one of the dies. The pressure in the pressure zone is maintained on the workpiece until the organic matrix composite panel is fully consolidated and formed.
摘要:
A process for obtaining long, continuous, thermoplastic welds on large structures. A series of tabs are used in pairs and especially in alternating, overlapping pairs to obtain resistance heating of a strip material placed in the bond line. The resistance of the tabs is less than that of the strip material. Conducting braid-tubes afford continuous welding when the bond line is curved. Alternatively, an electromagnetic field is used to take advantage of the induction heating. A wide susceptor is used to weld a current conducting substrate while avoiding bulk heating of the substrate. The unexpected property of current-conducting braid-tube susceptors, in which induction heating takes place at the center rather than at the edges of a flattened braid-tube susceptor, is used to obtain long continuous curved welds.
摘要:
The invention relates to an electro-welding element for interconnecting two pieces made of plastic, the electro-welding element being made of conductive plastic, either an intrinsically conductive plastic or an extrinsically conductive plastic. In a preferred embodiment, the electro-welding element includes an electro-welding portion constituted by two cylindrical sleeves and a thermoregulation portion constituted by a central portion interconnecting the two sleeves. An electro-welding coupling for interconnecting two tubes made of plastic may be formed by overmolding a plastic sleeve onto the electro-welding element, the sleeve being provided with power supply terminals.
摘要:
A thermally responsive substrate includes an electric circuit extending throughout the substrate and providing multiple terminal pads through the substrate for the application of electrical current for heating the thermally responsive substrate. A tool for the application of electrical current to the terminals pads includes a device having multiple spaced apart contact probes for engaging selected terminal pads of the substrate.
摘要:
A carpet seaming apparatus includes an elongated bonding tape having an electrical resistance circuit with contacts at the edge of the tape mounted on the face thereof with a hot melt adhesive in the form of elongated beads running the length of the tape that melts in response to electrical current in the resistive conductors. A tool having spaced apart electrical contacts for engaging the contacts adjacent the edges of the tape inducing an electrical current therein for heating and melting the hot melt adhesive.
摘要:
There is provided a plastic collar integral with the outer jacket of a cable. The plastic material includes a mixture of a plastic and an electrically conductive material such as carbon black. The plastic is melt bonded to the cable jacket by applying electric current through the material, thus melting the material onto the jacket of the cable. Upon melting, the semi-conductive plastic may be molded into the desired form, and upon cooling, it becomes bonded to the cable jacket. The collar may be used as a seal for the ends of a cable splice closure as well as a shoulder for securing a sealing gasket to a cable for use in such closures. The collar also may be used as strain-relief for the conductors which are inside the cable as well as other uses.
摘要:
A resistance spot welding system can join two polymeric workpieces and includes a power supply. The power supply has a positive terminal and a negative terminal. The resistance spot welding system further includes a welding electrode assembly electrically connected to the power supply. The welding electrode assembly includes a housing, a first electrically conductive pin and a second electrically conductive pin. The first and second electrically conductive pins both protrude from the housing. The first electrically conductive pin is electrically connected to the positive terminal of the power supply, and the second electrically conductive pin is electrically connected to the negative terminal of the power supply. The second electrically conductive material is electrically insulated from the first electrically conductive pin. The first and second electrically conductive pins are at least partly made of a material having a hardness ranging between 50 HRC and 70 HRC.