The present invention discloses a foldable FRP plate, comprising a plurality of first regions and one or a plurality of second regions which are integrated in one piece; the second region is located between two adjacent first regions, so that the adjacent first regions being folded and unfolded relative to each other with the second region as a rotating shaft; the first regions are plate-like products manufactured by impregnating fiber woven fabric with resin for curing, are rigid and cannot be folded; the second region is flexible fiber woven fabric and has a width being two times a design thickness of the FRP plate. The present invention also discloses a manufacturing method, including laying the fiber woven fabric according to a design thickness and a layer layout; dividing the first regions and the second region according to an origami design method.

An embossing method for floor tiles makes thermoplastic polymer material in a floor tile to be embossed be converted into a viscous flow state by an ultrasonic embossing device, and embosses a floor tile modeling and a floor tile pattern on the floor tile to be embossed at the same time, such that the floor tile modeling and the floor tile pattern are not prone to rebound after being formed by embossing, stability of embossing of the edge of the floor tile is greatly improved, and yield rate of the floor tile increases. Additionally, the ultrasonic embossing device in the present application can further configure an ultrasonic welding head as a first welding head or a second welding head according to the floor tile modeling and the floor tile pattern, thereby meeting many types of different requirements for embossing patterns and reducing development cost of production lines.

An induction heating tool that holds voltage or current supplied to the induction tank circuit constant and tracks changes in the other of voltage or current during each induction heating cycle. The disclosed induction heating tool exploits the fact that the resistance an attachment plate increases along with the temperature of the attachment plate. During an induction heating cycle, the attachment plate is magnetically coupled to a work coil and the resistance of the attachment plate is reflected to the circuit. Changes in the resistance of the attachment plate alter the pattern of energy delivery from the work coil to the attachment plate in a predictable way. Calculations accurately predict the temperature of the attachment plate over a wide variety of ambient conditions, including the presence of moisture at the membrane/attachment plate interface. The disclosed induction heating tool produces consistent results without calibration for ambient conditions.

A cavity is filled with a foam-in-place insulation by a self-contained dispensing system for which precursor vessel pressures and precursor flow rates decrease as the precursors are dispensed. Flow rate functions for the precursors are pre-calibrated as a function of vessel pressures and/or related parameters such as vessel weights, precursor levels in the vessels, and total volumes dispensed. The cavity is filled by at least one shot of the precursors, each shot comprising a plurality of counts that are announced to a user during the shot. The length of each count and/or the number of counts is/are adjusted according to the flow rate functions in compensation for the decreasing vessel pressures. Embodiments further adjust the count durations for reduced start-up flow at the start of a shot and/or extended flow at the end of a shot, due to mechanical properties and/or user reaction times.