8results about How to "Reduce melt viscosity" patented technology

This utility model discloses an injection mold for manufacturing control panel housings, relating to the field of control panel housing manufacturing technology. The utility model includes a mounting frame providing installation and stable support for the device, a vibration mechanism housed within the mounting frame, and a demolding mechanism for vibrating the mold during injection molding. Specifically, the vibration mechanism involves a motor driving the front rotating shaft to rotate, while a pulley system simultaneously drives the rear rotating shaft to rotate synchronously. Two impact wheels jointly strike the bottom of the lower mold, causing it to vibrate. During vibration, the lower mold, through the mounting plate, compresses the damping rod and spring, which work together to buffer the vibration and reduce violent shaking. This vibration mechanism reduces the viscosity of the molten plastic, promotes uniform filling of the cavity, assists demolding, simplifies the mold structure, and reduces cost and maintenance difficulty.

The utility model discloses a kind of tensile tear-resistant reinforced CPVC cable protection pipe, it includes pipeline, the inside fixed connection of pipeline has CPVC resin, the inside fixed connection of CPVC resin has nano calcium carbonate, the inside fixed connection of nano calcium carbonate has calcium-zinc stabilizer.Through the above structure, there is a layer of CPVC resin in pipeline, the smooth surface of CPVC resin can reduce the contact area of cable and pipe wall, reduce the local temperature rise caused by heat generation due to friction, while the air gap between pipe wall and cable is more uniform, beneficial to the heat dissipation of cable operation, prolong the service life of cable, there is also a layer of nano calcium carbonate in it, nano calcium carbonate particle size is usually 10~100nm, specific surface area is large and dispersibility is good, uniformly filled in CPVC resin matrix can form "rigid particle reinforcing effect", the tensile strength of inner wall layer is improved by 20%~30%, and bending modulus is improved by 15%~25%.

The invention provides a glass fiber reinforced polypropylene material and a preparation method thereof, and belongs to the technical field of propylene copolymers. The preparation method comprises the steps of maleic anhydride copolymer preparation, polypropylene pretreatment, glass fiber pretreatment and blending. The method for preparing the maleic anhydride copolymer comprises the following steps: adding maleic anhydride, styrene and azodiisobutyronitrile into methylbenzene, heating to 70-90 DEG C in a nitrogen environment, stirring and reacting for 1-2 hours at the current temperature, adding glycidyl acrylate, continuously reacting for 30-50 minutes, naturally cooling, filtering, washing and drying to obtain the maleic anhydride copolymer. According to the glass fiber reinforced polypropylene material, the tensile strength is 32-35 MPa, the elongation at break is 71-75%, and after a thermal aging test, the tensile strength is 29-33 MPa, and the elongation at break is 65-70%.

This invention discloses an enhanced antistatic polyetheretherketone (PEEK) composite material and its preparation method. The composite material is prepared from the following raw materials in parts by weight: 60-85 parts of PEEK resin, 5-15 parts of a first synergistic component, 3-10 parts of a second synergistic component, 2-8 parts of a third synergistic component, and 1-5 parts of a high-temperature processing aid. The first synergistic component is a mixture of a metal-based conductive filler and a high-temperature resistant antistatic synergist; the second synergistic component is ionic liquid-functionalized modified graphene; the third synergistic component is a composite of carbon nanotubes and conductive nanofibers; and the high-temperature processing aid includes a high-temperature lubricant and a high-temperature antioxidant. The preparation method includes steps such as preparing various premixes, melt blending, extrusion granulation, and supercritical fluid in-mold foaming. This invention constructs a stable three-dimensional conductive network through the synergistic effect of multi-scale conductive fillers, giving the composite material excellent antistatic properties.

The invention discloses soluble polyimide resin with high temperature resistance and stable thermal size as well as a preparation method and application of the soluble polyimide resin. The soluble polyimide resin has a structure as shown in the following formula, n is more than 0 and less than or equal to 10, and X is more than or equal to 0.5 and less than 1. The polyimide resin provided by the invention has the characteristics of low melt viscosity, high solubility, stable thermal size of a cured product and ultrahigh heat resistance, and solves the technical problems of poor manufacturability, high thermal expansion coefficient of the cured product, insufficient heat resistance and poor interface of a composite material in the existing thermosetting polyimide resin.

This invention relates to a low-cost, long-life alkaline refractory material for non-ferrous metal smelting, and pertains to the technical field of non-ferrous metal smelting. The low-cost, long-life alkaline refractory material for non-ferrous smelting of this invention, by mass percentage, comprises a basic alkaline component, functional additives, and a binder. The basic alkaline component contains 40%–60% calcined dolomite and 20%–40% sintered magnesia. The functional additives contain 3%–8% silica fume, 5%–15% bauxite clinker, 2%–6% silicon carbide, and 1%–5% calcium fluoride. The calcined dolomite is a decomposition product of CaMg(CO3)2 calcined at 1000℃–1200℃. The alkaline refractory material of this invention has low cost (30%–50% lower than traditional magnesia-chrome bricks) and significantly improved service life in the high-temperature corrosive environment of copper, lead, and zinc smelting. It is suitable for furnace linings, chutes, flues, and other parts in non-ferrous smelting, and has significant industrial application value.

This invention proposes a spherical polylactic acid (PLA) powder with a wide sintering window, its preparation method, and its application. The preparation method includes the following steps: S1, mixing a poor solvent and PLA granules, adding the mixture to a reaction vessel, stirring, first heating, then holding at that temperature; S2, then cooling to 100-118°C, holding at that temperature for 30-60 minutes; S3, removing the product, washing and drying the product to obtain the spherical PLA powder. This invention is based on thermally induced phase separation, adding a spheroidization step to increase the crystallinity and sphericity of the PLA powder. The prepared spherical PLA powder has a particle size distribution of 10-120 μm and a bulk density of 0.3-0.45 g / cm³. 3 The powder possesses high fluidity, a wide sintering window, and excellent sintering performance, while retaining the excellent greenness and biocompatibility of polylactic acid. PLA parts formed by LPBF printing using the spherical PLA powder prepared in this invention exhibit good mechanical properties.

This invention relates to the field of architectural ceramics technology, disclosing a titanium sphene crystal frit, its preparation method, and its application. The raw materials include kaolin, titanium dioxide, quartz, potassium feldspar, calcite, and wollastonite. By pre-firing the titanium sphene crystal frit using this formula, the titanium sphene crystals are pre-dissolved in the glass phase. During the subsequent glaze firing process at 1200℃, the titanium sphene crystals melt again and precipitate a second time, resulting in an opaque glaze layer. This secondary crystallization enhances the chemical stability of the titanium sphene crystal frit during subsequent glaze firing, leading to a more stable increase in the solar reflectance of the fired glaze. This solves the problem of unstable reflectivity in glazes when directly using titanium sphene powder or combining it with titanium dioxide and titanium frit to directly form titanium sphene crystals during glaze firing.