3results about How to "Guaranteed heating temperature" patented technology

This invention relates to the field of heat-sealing technology for plastic bags, and particularly to a method for improving the quality of heat-sealing. The method includes a pressing assembly comprising a first pressing assembly and a second pressing assembly that can be approached and moved away from each other. When the first and second pressing assemblies are close together, a second heating assembly cuts the plastic bag, and the first heating assembly presses both sides of the cut and performs heat sealing. The second heating assembly is fixed on a first pressing base, and a second heating wire is disposed on a thermal cutting base. A second thermally conductive diaphragm covers the outside of the second heating wire, forming a knife-edge shape. Compared with existing technologies, this invention's method for improving the quality of heat-sealing ensures complete heat sealing on both sides of the cut when the plastic bag is cut, preventing sticking to the equipment, improving the quality of heat-sealing, making automated plastic bag packaging operations more stable and reliable, facilitating continuous equipment operation, reducing maintenance costs, and enhancing the user experience.

This invention discloses a method for preparing tungsten wire and the tungsten wire itself. The method involves first forging and drawing a tungsten alloy, then drawing the tungsten wire in a wire drawing machine containing a two-stage natural gas heating tank. When the diameter is 1.4 ≤ R ≤ 2.3 mm, the first stage natural gas to air flow rate ratio is 0.2R cubic meters: 3(R+0.1) cubic meters, and the second stage natural gas to air flow rate ratio is 0.5R cubic meters: 6(R+0.1) cubic meters. When the diameter is 0.77 ≤ R < 1.4 mm, the first stage natural gas... The first stage of natural gas to air flow ratio is 0.18R:3R, and the second stage ratio is 0.45R:5(R+0.2). When the diameter is 0.35≤R<0.77mm, the first stage ratio is 0.15R:2.5(R+0.05), and the second stage ratio is 0.42R:4.5(R+0.25). The resulting tungsten wire is then heated in an electric furnace and drawn in multiple passes to produce fine tungsten wires with a diameter of 0.0630–0.0660mm. This invention reduces the natural gas to air flow ratio while decreasing the wire diameter, thus maximizing natural gas utilization while maintaining the heating temperature.

The utility model provides a lightweight aggregate calcining device. The lightweight aggregate calcining device comprises a segmented heating furnace body, a waste heat circulating module, a spiral conveyor and a cooling module, the segmented heating furnace body is divided into a preheating section, a main calcining section and a slow cooling section which are connected in sequence through a heat insulation assembly. The preheating section is provided with an electric heating part, the main calcining section is provided with a combustor, and the slow cooling section is provided with a cooling part. The upper portion of the kiln head is communicated with an outlet of the raw material pretreatment device, and a ventilation opening is formed in the lower portion of the kiln head. The kiln tail is connected with an inlet of the screw conveyor, and the screw conveyor is used for conveying the calcined lightweight aggregate to the cooling module for cooling and shaping. The waste heat circulation module comprises a first circulation pipeline arranged between the two heat insulation assemblies and a second circulation pipeline arranged between the slow cooling section and the ventilation opening. According to the utility model, multi-section gradient heating is adopted, so that local over-burning or under-burning is avoided. Heat insulation of all the sections is achieved, high-precision temperature control is achieved, and the stability of the partition temperature and the uniformity of gradient distribution are ensured.