5results about How to "Avoid premature curing" patented technology

A furan resin sand filling device for a large metal casting mold relates to the technical field of part casting and comprises a feed box, a connecting pipe and a conveyor, the connecting pipe communicated with the feed box is arranged at the upper end of the feed box and rotatably connected with the feed box, the other end of the connecting pipe is connected with a stirrer, the conveyor is arranged on one side of the feed box, and a driving motor is arranged on the other side of the feed box. The driving motor drives the conveyor to rotate, one end of the conveyor is communicated with the material box, a discharging pipe is arranged on the lower portion face of the other end of the conveyor, and a flow guide pipe is arranged below the discharging pipe. The furan resin sand mixing device is high in practicability and very convenient to use, the baffle and the sealing plate are arranged on the discharging pipe, excessive contact between the mixed furan resin sand and oxygen is avoided, premature curing of the furan resin sand is avoided, and production materials are saved; and the grid, the vibrator and the exhaust pipe are arranged on the flow guide pipe, so that waste gas is absorbed during charging, and the body health of production personnel is ensured.

This application discloses an adhesive for aramid bulletproof materials, its preparation method, and its application. The adhesive for aramid bulletproof materials includes component A and component B. By total weight percentage, component A includes 4-6.5% acrylic resin, 5-7.5% blocked isocyanate, 1.2-1.5% silane solvent, and 1.8-2.0% wetting agent; component B includes 15-18% waterborne polyurethane, 8-10% epoxy resin, 1.0-2.0% epoxy resin solvent, 1.6-2.4% organosilicon crosslinking agent, 0.2-0.4% zinc catalyst, 0.12-0.25% epoxy resin curing agent, and 0.4-0.6% additives. The balance is deionized water. When using, component A and component B are mixed at a mass ratio of 1:(1-1.2). This invention solves the problem that existing adhesives for aramid bulletproof materials are difficult to achieve simultaneously with high toughness, high strength, and excellent interfacial stability.

The utility model discloses an automatic equipment of gluing and film covering and solidification, including unwinding and winding assembly, including the unwinding roll of being able to to the one end unwinding of release film, still including the winding roll of the other end winding of release film, coating and coating subassembly, including the parallel arrangement of adjacent load roller, coating roller, ration roller, and coating roller is located between load roller and ration roller, and the top of the junction of coating roller and ration roller forms coating accumulation space, and coating roller can adhere and carry coating, and when release film passes load roller, can receive the coating adhered on coating roller, solidification subassembly, to the release film of adhering coating carries out light solidification, stripping and transferring subassembly, including the conveyer belt of being able to convey board material, and the coating after solidification is transferred to the board surface from release film with the cooperation of release film and conveyer belt. Adopt this utility model with the help of release film to indirectly coat, realize coating even film covering.

The invention provides a production method and equipment of a marine electrical fireproof material. The production method comprises the following steps: S1, drying raw materials; s2, preparing master batches under a low-temperature condition; s3, high-temperature curing is conducted through melt molding; and S4, post-processing. The production method provided by the invention can effectively prevent a carbon layer from cracking, significantly improve the high temperature resistance of the material, and realize uniform dispersion of refractory components in a resin matrix.

The application discloses a patch bubble pressing and forming device for a packaging box, relates to the technical field of bubble pressing and forming devices, and comprises a first roller pressing mechanism, a vertical bubble pressing mechanism and a second roller pressing mechanism. The first roller pressing mechanism is arranged on one side of a device main body and located at the upper end of a pressing table. An elastic assembly is arranged in the pressing table. The lower end of the vertical bubble pressing mechanism is provided with a pressing plate. Vent holes are arranged at the center of the lower end of the pressing plate. The second roller pressing mechanism is installed on the upper end of the device main body and located on one side close to the vertical bubble pressing mechanism. When pressing the bubble, the pressing plate at the lower end of the vertical bubble pressing mechanism first presses the bubble, the first roller at the lower end of the first roller pressing mechanism then performs roller pressing along the X-axis direction of the device main body, the second roller at the lower end of the second roller pressing mechanism finally performs roller pressing along the Y-axis direction of the device main body.