40results about How to "Shear evenly" patented technology

The invention discloses a method for eliminating a tiger skin defect of a polypropylene composition and the polypropylene composition prepared thereby. The polypropylene composition comprises polypropylene resin, a toughening agent, a filler, a pigment and an auxiliary agent, wherein the polypropylene resin is formed by compounding high-flow polypropylene with the melt mass flow rate (MFR) of 30-120g/10min and low-flow polypropylene with the melt mass flow rate (MFR) of 0.1-29g/10min. By a preparation method, through a combined design of screws and adjustment of extrusion process parameters, the tiger skin defect of the prepared polypropylene composition can be eliminated; in addition, the preparation technology is stable and the repeatability is good. The polypropylene composition prepared by the method provided in the invention can be applied to automotive bumpers and interior products.

The invention discloses modified regeneration high impact polystyrene for tubes and pipe fittings and a preparation method of the high impact polystyrene, which solve the problems of high cost and complex method of the conventional high impact polystyrene for the tubes and pipe fittings. The modified regeneration high impact polystyrene mainly comprises the following components by weight percentage: 10%-50% of high impact polystyrene, 15%-80% of recycled high impact polystyrene, 5%-20% of toughening agent, 5%-40% of calcium carbonate, 0.1%-1% of antioxygen 1010, 0.3%-1% of silane coupling agent and 0.4%-2% of pigment. The invention also provides the preparation method of the modified regeneration high impact polystyrene for the tubes and pipe fittings. The preparation method can be used for effectively recycling waste high impact polystyrene. The modified regeneration high impact polystyrene for the tubes and pipe fittings has the advantages that resources are saved, the environment is protected, the cost is lowered, the preparation process is simplified and the like.

The invention provides a biomass fuel crusher. Energy consumption and investment of equipment are reduced by the biomass fuel crusher by reducing the number of driving motors, and at the same time, the biomass fuel crusher enables the crushing speed of cutter shafts to keep the same, and crushing effect is improved. The biomass fuel crusher comprises a hopper and two cutter shafts, wherein the two cutter shafts are arranged side by side and are respectively arranged on a support. One cutter shaft of the two cutter shafts is a driving cutter shaft. The driving cutter shaft is connected with gear reducers through a coupling. The gear reducers are respectively connected with an electrical machine. The two cutter shafts are respectively provided with a cutter head in a sleeved mode. The cutter heads on the two cutter shafts are mutually embedded into each other and are arranged at interval in a dislocated mode. A diffusion knife is arranged along the peripheries of the cutter heads. Rotating directions of the two cutter shafts are contrary to each other. When the two cutter shafts rotate, cutting edges of adjacent diffusion knives on the two cutter shafts are of shearing bite shapes. The lower portion of the hopper is connected with a retainer plate. The retainer plate is guided to cutter head meshed mouths of the two cutter shafts. The biomass fuel crusher is characterized in that one ends of the two cutter shafts are respectively connected with a chain wheel. Gears of the two chain wheels are meshed with each other.

A reciprocating pin-screw extruder with conic screw bolt whose spiral threads in the extruding out and mixing segments are periodically divided into 4 spiral plates alternatively staggered is composed of extruding system and drive system. The gap between every two spiral plate is used as the channel of pin. Its drive system has a drive box consisting of input shaft, gear set, inclined wheel, connecting rod and swinging axle. Its advantages are stable flow state of material, high effect and low energy consumption.

The invention discloses an anti-stress whitening transparent filling master batch for polypropylene and a preparation method thereof. The baster batch is prepared from the following raw materials in percentage by weight: 15 to 25 percent of polypropylene, 50 to 65 percent of transparent powder, 10 to 15 percent of polysiloxane, 0.5 to 1 percent of nucleating agents, 8 to 10 percent of compatilizers, 0.5 to 1 percent of coupling agents and 0.5 to 1 percent of antioxidants. The raw materials are weighed according to the mixture ratio; the transparent powder is added into a high-speed material mixing machine; the coupling agents are added into the material mixing machine to be mixed with the transparent powder; the polypropylene, the polysiloxane, transparent powder subjected to surface treatment, compatilizers, nucleating agents and antioxidants are sequentially added; stirring is performed so that the materials are uniformly mixed; the mixed materials are added into a double-screw extrusion machine to be extruded into strip-shaped articles; the master batch is obtained after the cooling. The anti-stress whitening transparent filling master batch has the advantages that the product surface smoothness and wear-resistance can be improved; the moisture absorption is avoided; the filling quantity is great; the transparency of the product is not influenced; the product manufacturing cost can be favorably reduced; good application values are realized.

The invention relates to a slitting machine, in particular to a slitting machine capable of adjusting the feeding width and length of steel sheet coiled material. The technical problem to be solved bythe invention is to provide the slitting machine capable of adjusting the feeding width and length of steel sheet coiled material, and the slitting machine can quickly adjust the distance between cutters, improve the working efficiency and easily cut steel sheets. In order to solve the technical problem, the invention provides the slitting machine capable of adjusting the feeding width and lengthof the steel sheet coiled material. The slitting machine comprises a base, three first installation frames and two second installation frames, and a mounting plate is connected to the top of the base; the three first installation frames are evenly connected to the base at intervals; and the two second installation frames are connected to the two sides of the base respectively. Steel sheets can belongitudinally sheared through a cutting mechanism, a power mechanism and a feeding mechanism, intermittent feeding can be conducted on the steel sheets during shearing, manual feeding is not needed,and time and labor are saved.

The invention relates to the technical field of coated plastic production, in particular to a preparation method of coated protective plastic capable of being bonded with metal, which comprises the following steps: S1, feeding raw materials; raw materials for manufacturing wrapping plastic are subjected to kneading and cold mixing treatment, kneading of the raw materials is completed through a kneading machine, side-by-side tangent differential arrangement is adopted, namely, the speed of one stirring paddle is high, the speed of the other stirring paddle is low, so that shearing force is generated, the mixed materials can be rapidly sheared due to different paddle speeds, and therefore the materials can be evenly mixed; cold mixing of raw materials is completed through the cold mixing machine, the cold mixing machine is provided with a cooling pipe, a cooling system is used for injecting a cooling agent into the cooling pipe through a water inlet, then the raw materials in a machine body are cooled, an automatic cutting machine is used for cutting a plastic film covered with release paper into a preset shape, and leftover materials are recycled; and the cut wrapping plastic finished products are collected and wrapped in a centralized mode, the metal parts can be directly wrapped after the release paper is torn off, and use is convenient.