159results about How to "Reduce molding pressure" patented technology

The invention relates to a low temperature and low pressure BMC (Bulk Molding Compound) material. The low temperature and low pressure BMC material comprises unsaturation resin, a low shrinkage additive, a filler, a curing agent, a mold release agent, a polymerization inhibitor, an auxiliary and glass fiber, wherein the mold release agent is a mixture of zinc stearate and calcium stearate. The molding temperature of the low temperature and low pressure BMC material provided by the invention is only 110-130 DEG C and is reduced by about 30% when compared with the molding temperature of the traditional BMC molding material; and the molding pressure of the low temperature and low pressure BMC material provided by the invention is only 70-100 kg/cm2 and is reduced by about 50% when compared with the molding pressure of the traditional BMC molding material.

Improved polypropylene resin foamed beads that without detriment to the excellence in properties, such as compression properties and heat resistance, characterizing the polypropylene resin foamed beads, can provide a polypropylene resin foamed bead molded article with equal properties by an molding conducted at low heating temperature. There are disclosed polypropylene resin foamed beads composed of a polypropylene resin of 115 to 135° C. melting point and 500 MPa or higher Olsen flexural modulus. The amount of ash at the surface of the foamed beads is 3000 wt. ppm or less (including 0). With respect to the foamed beads, in the first DSC curve obtained by heating 1 to 3 mg of polypropylene resin foamed beads from room temperature to 200° C. at a temperature elevation rate of 10° C./min by the use of a differential scanning calorimeter, there appear not only one or more endothermic peak (Pa) having the peak temperature within a temperature zone not higher than the melting point of the resin but also one or more endothermic peak (Pb) having the peak temperature within a temperature zone exceeding the melting point of the resin and not lower than 130° C. The total calorific value of the endothermic peak (Pb) is in the range of 2 to 12 J/g. Further, there is disclosed a foamed bead molded article obtained by molding the above foamed beads.

The invention relates to the activated carbon manufacturing field, in particular to a method of manufacturing columnar activated carbon, and solves the problems of high production cost, environmental pollution, low productivity, etc. caused by the addition of coal tar and hydraulic shaping devices required by the prior columnar activated carbon. A shaping device adopted by the invention when shaping is a feed granulation device manufactured by Fuji Seiki Equipment Manufacture Company, and the type of the shaping device is F-150. When coal is proportioned, coal powder is 72-78 percent, asphalt is 8-12 percent, water is 12-18 percent, the temperature of the coal powder is 18-20 DEG C, the temperature of water is 50-80DEG C, and the coal powder consists of 30-45 percent of soft coal, 25-35 percent of coke powder and 30-45 percent of coking coal. With the adoption of the shaping device, the method has the advantages of low shaping pressure, moderate operation conditions, improved productivity, simple process, reduced environmental pollution, saved heat energy, reduced production cost, and significantly improved the yield of products. The technical data of the prepared finished columnar activated carbon granules can be completely in accordance with the requirements. Furthermore, the method overcomes the technical prejudice of the technical field that only coal tar and the hydraulic shaping device can ensure the shaping of coal quality and the strength of activated carbon.

The invention relates to a lightweight forsterite insulating brick and a manufacturing method thereof. The invention adopts a technical proposal that the insulating brick is prepared from the following raw materials in portion by weight: 60 to 70 portions of forsterite sand of 1 to 0.5 millimeter, 15 to 25 portions of magnesite of 1 to 0.5 millimeter, 5 to 15 portions of magnesite powder of less than or equal to 0.088 millimeter, and 5 to 10 portions of SiO2 micro powder of less than or equal to 2mu m; and the adding amount of a bonding agent is 5 to 15 percent of the gross weight of the raw materials. The lightweight forsterite insulating brick has the advantages of small volume weight, low heat conduction coefficient, good heat insulation effect, and high normal pressure strength. The manufacturing method adopts a hydraulic press to mold, not only can solve the problems such as difficult molding and uneven density of green bricks, is easy to strip a mold, does not need to cut a finished product, simultaneously reduces energy consumption, saves resource, reduces discharge of pollutants, and protects environment.

The invention relates to the technical field of metal soft magnetic materials, and discloses a preparation method of a high-permeability aerosolized iron silicon aluminum magnetic powder core. The preparation method comprises the steps of 1) aerosolized powdering, 2) granularity combination, 3) powder thermal treatment, 4) insulating coating, 5) secondary coating, 6) pressing and molding, 7) magnetic core annealing and 8) impregnation spraying. The aerosolized iron silicon aluminum magnetic powder has the advantages of being good in formability and high in permeability.

The invention is a magnesium alloy sheet puffing shaping method relates to magnesium alloy puffing shaping production technique. The magnesium alloy sheets are puffing shaped in following steps: a. the sheets are heated to puffing shaping temperature 200 to 400 deg. C and keep the temperature for 10 to 60 minutes after brought into moulds; b: apply compressing load in axial direction in the moulds; c. aerate in the mould with air pressure 0.1 to 0.8 MPa and keep the pressure for 10 to 30 minutes; d. go on to increase the air pressure in the mould to 1 to 1.5 MPa and keep the pressure for 10 to 30 minutes to obtain a piece of the same moulding surface with the mould and finally the product after cooling and demoulding. By applying puffing shaping method to magnesium alloy piece production the invention provides the magnesium alloy material shaping with an economy, efficient and practical production technique which has advantages such as high thin wall shaping performance, high passing percent, high shaping accuracy, high material using ratio, lowering the piece weight, saving the cost, simple technique and so on.

The invention discloses gray antistatic polypropylene composite foamed beads with a skin-core structure, which are composed of a foamed core layer and a non-foamed skin layer, and the foamed core layer is composed of polypropylene, a cell nucleating agent, an antioxidant, colored carbon black and a lubricant. The skin layer is prepared from polypropylene, a polyether block copolymer antistatic agent, maleic anhydride grafted modified polypropylene and multi-walled carbon nanotube; the composite foamed beads are obtained by extruding and granulating through a co-extrusion extruder and then foaming through a high-pressure foaming kettle. The skin layer contains the composite antistatic agent and the low-melting-point polypropylene, so that good fusion bonding, apparent quality and stable permanent antistatic property of the molded product are guaranteed; the foaming effect of the core layer is excellent, and the foaming ratio adjustability and the excellent mechanical property of a molded product are guaranteed. The molded product not only has permanent antistatic property, but also has good rigidity.

The invention relates to an inductor warm-pressing forming method and an inductor. The inductor warm-pressing forming method comprises the steps of heating magnetic powder in a molding cavity rapidly by utilizing a changeable magnetic field of lengthways AC or ripple wave containing DC generated at the center of a molding cavity by an electrified induction coil which is arranged at the periphery of the molding cavity; then transferring heat to a binder on the surface of the magnetic powder by the heated magnetic powder to soften the binder; and performing compression molding on granulation powder which is composed of the magnetic powder and the binder to form the inductor. The inductor has high magnetic conductivity, low DC resistance and few apparent defects; and the heating time of the inductor warm-pressing forming method is short; powder is heated based on an electromagnetic induction principle; and the inductor warm-pressing forming method has advantages of high production efficiency and low energy consumption.

An injection molding machine 10 utilizes a two part mold to produce a molded part. A machine includes a clamping mechanism 20 including one or more clamping cylinders 22 for applying a mold clamping force to the two part mold, an injection mechanism 30 for plasticizing material and injecting the plasticized material into the closed mold, and a controller 50 for powering the molding machine hydraulic system 52. In one embodiment, clamping pressure is automatically increased or decreased to allow air to escape as plasticized material flows into the mold cavity. In another embodiment, the controller provides a minimum clamp pressure to maintain the plasticized material within the mold as a function of fluid injection pressure to the screw member of the injection system.

The invention provides a revolving bed coal catalytic pyrolysis method. The method comprises steps of raw coal pretreatment, catalyst preparation, powdered coal shaping with addition of the catalyst, catalyst briquette coal drying, and pyrolysis in a revolving bed thermal decomposition furnace, and the catalyst is a mixture of Fe2O3 and CaO. The method solves the problems that after powdered coal shaping with addition of the catalyst, the briquette coal is low in intensity, and is easy to pulverize during the pyrolysis process. The dust content in tar can be lowered, the tar yield is raised, and the tar quality is improved.

The invention discloses a preparation method and an application method of granular activated carbon for xylose decoloring, which belongs to the field of preparation methods and application methods of activated carbon. The preparation method comprises the following steps: (A) preparing raw materials, namely, weighing phosphoric acid method powder activated carbon made from saw dust, an acrylic emulsion and water according to a ratio of acrylic emulsion to phosphoric acid method powder activated carbon to water being (0.37-0.39):1:1; (B) mixing the raw materials, namely, mixing the weighed raw materials and sufficiently stirring till the granules are uniformly mixed; (C) forming granules, namely, extruding the uniformly mixed raw materials to form granules by using a pelletizing machine at the constant temperature of 90 DEG C, so as to make granules with the particle size of 2-5mm, cooling the granules to be 40-50 DEG C, and drying; (E) separating and cooling. The granular activated carbon prepared by using the method is good in adsorption property, high in strength, acid-alkali resisting, recyclable and reusable, the liquid adsorption amount of unit volume is equivalent to that of other granular activated carbons, and the production environment is improved.

The invention relates to a hollow plate and a manufacturing method thereof. The hollow plate is manufactured from the following components by weight: 40-50 parts of thermoplastic resin, 50-60 parts of a continuous fiber bundle, 1-5 parts of a grafting agent, and 0.4-0.6 part of an antioxidant. The manufacturing method includes: adopting a lamination process to lay a strip prepreg made from continuous fiber reinforced thermoplastic resin according to a mode of 0 degree-90 degrees, and placing the strip prepreg in a mold to conduct thermal forming, thus obtaining the hollow plate. By changing the hollow position and increasing the plate height, the plate strength can be enhanced, the sheet weight is reduced, and the cost is lowered. With the characteristics of high strength, high modulus, corrosion resistance, good water resistance, no conductivity and the like, the hollow plate is convenient to process and easy to clean, and has short forming cycle. The waste materials in production and the final product can all realize 100% recovery. Thus, the method belongs to a ''green'' product technology.

The invention discloses a preparing method of tungsten copper powder for a perforating bullet type cover, and relates to the technical field of manufacturing of petroleum perforating devices. According to the preparation method, copper acetate is selected as copper salt for wrapping tungsten powder particles, after being mixed, the copper acetate and the tungsten powder particles are calcinated in a hydrogen environment and are reduced to obtain copper-coated tungsten powder, then, the copper-coated tungsten powder is mixed with electrolytic copper powder, and therefore the tungsten copper powder is obtained. Based on the surface features of tungsten copper powder particles and a powder particle segregation mechanism that powder particles with different components have the phenomenon of segregation under the joint function of particles proportions and particle internal friction force, the preparing method solves the problems of increase of production costs and the low production efficiency caused by a degreasing presintering process on the bases of solving the problem of segregation in the processes of mixing and rotary pressing of tungsten powder and copper powder and guaranteeing the perforating performance of perforating bullets.

The compression molded tooth used for practicing dental cutting treatment of the present invention comprises a composition containing a powder or powders of saccharide, polysaccharide, protein, and/or glycoprotein each having a particle size of 1 to 100 μm.

The invention discloses a forming method of a lignite lump coal facilitating container transport, which comprises the following steps of: (1) treating raw materials: adjusting the temperature of lignite powder to between 95 and 105 DEG C and the water content to between 12 and 14 percent (weight) by using a drying device; (2) pressing and forming: pressing the lignite powder by using a hydraulic machinery, controlling the pressing pressure to more than 35 MPa, and pressing for three to four times; and (3) cooling: naturally cooling the pressed lump coal by standing. The forming method of lignite lump coal facilitating the container transport has the advantages of simple processing technology, high water resistance and stability of the formed lump coal, contribution to the container transport by sea and land, low dust pollution of coal during use, contribution to environmental protection and great promotion of mining and use of Australian lignite and other lignite.

The invention relates to a puncher pin auxiliary device suitable for self-piercing riveting and a self-piercing riveting method. The puncher pin auxiliary device is arranged on the outer side of a puncher pin in a sleeving manner, a hollow amplitude variation mechanism of the puncher pin auxiliary device is driven by a drive mechanism for amplitude variation vibration, and vibration of the amplitude variation mechanism is transmitted to the puncher pin in threaded connection with the amplitude variation mechanism for vibration assistance. In the puncher pin auxiliary device, vibration is transmitted to to-be-connected parts through rivets, and the to-be-connected parts are promoted to be in full contact; metal plates are prevented from cracking, and the pressure needed for riveting is reduced; equipment light weight operation is promoted, the rivets, the plates and concave dies are promoted to be in full contact, the riveting quality is improved, connecting reliability is improved, andstacking can be achieved on traditional self-piercing riveting equipment; and the advantages that the structure is simple, and operability is high are achieved. On the basis of the traditional SPR process, longitrorse composite vibration with controllable amplitude is added for assisting in stimulation, the application range of the SPR process is widened, and connecting reliability between the to-be-connected parts is improved; and the structure is simple, operability is high, the manufacturing process is improved, and the quality of finished products is improved.

The invention provides an expandable polylactic acid composite micro-particle with a core-shell structure, a foamed bead and a molded piece thereof through structural design and an efficient co-extrusion technology. According to the invention, the outer layer of the composite foamed bead is a biodegradable elastic polyester skin layer, the main component is a biodegradable high-toughness thermoplastic copolyester elastomer, and good rebound resilience and impact resistance are provided for the composite foamed bead; the inner layer of the composite foamed bead is a biodegradable polylactic acid foaming core layer, and the composite foaming bead is high in compression strength, small in shrinkage rate and good in size stability; and the molded piece prepared by using the biodegradable polylactic acid composite foamed bead has the advantage of low molding energy consumption, excellent rebound resilience, impact resistance and dimensional stability, and is an ideal green packaging material for large-size pieces such as large liquid crystal screens of more than 100 inches, large precise electronic devices and the like, which have strict requirements on the size and also have buffering protection requirements.

A method for manufacturing the clamping plat of anchor device includes such steps as providing a plate with needed thickness, blanking to obtain an isosceles trapezoidal plate, punching with a bending die set to obtain an arc plate, pre-shaping with the shaping die sets A and B, fine shaping with the shaping die set C, and machining internal teeth by squeezing or milling. The said all die sets are composed of male die and female die.

A computer-implemented method and non-transitory computer medium for calculating a shrinkage of a molding product comprises a step of using a computer processor to calculate a molding pressure of a molding fluid in a molding cavity by taking into consideration an increase of a shear viscosity of the molding fluid by a decrease of a shear rate, and a step of calculating the shrinkage of the molding products by taking into consideration a variation of a specific volume of the molding fluid as the molding pressure and a molding temperature decrease.

The invention discloses a device for forming a bevel gear through ultrasonic-assisted cold-rocking-rolling. The device comprises a base, a lower die and an ultrasonic horn, wherein the base has an accommodating cavity with an upward opening; the lower die is used for clamping a workpiece; the ultrasonic horn is mounted in the accommodating cavity and comprises a positioning section, a first vibration mounting section and a vibration conversion output section which are sequentially and coaxially arranged along a vertical axis; the positioning section is connected with the base and is positioned in the circumferential direction; a first piezoelectric actuator is mounted on the first vibration mounting section; a second piezoelectric actuator is mounted on the vibration conversion output section; ultrasonic vibration generated by the first piezoelectric actuator and ultrasonic vibration generated by the second piezoelectric actuator are superposed; and the vibration conversion output section makes contact with the workpiece and is used for transferring the ultrasonic vibration to the workpiece. The accommodating cavity is used for accommodating the ultrasonic horn, and ultrasonic vibration with larger vibration energy is generated after the ultrasonic vibration generated by the first piezoelectric actuator and the second piezoelectric actuator on the ultrasonic horn is utilized and superposed, so that the machining requirement is met.