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153results about How to "Physical health hazard" patented technology

Forming technology and preparation method for double-color and double-hardness sole

ActiveCN103128978AEliminates manual hand gluing stepsSimple processDomestic articlesPlastic injection moldingHardness
The invention discloses a forming technology and a preparation method for a double-color and double-hardness sole. The forming technology and the preparation method for the double-color and double-hardness sole mainly includes the following steps: step 1, a mold is prepared, wherein a set of plastic injection mold is prepared; step 2, a plastic injection molding process is prepared, wherein a plastic injection molding machine is provided with two injection gun barrels which can be used for injecting plastics into the plastic injection mold simultaneously; step 3, the plastic injection molding process is carried out, wherein the plastic injection mold is placed on a mold frame of the plastic injection molding machine, the plastic injection molding machine is started, the two injection gun barrels are used for injecting the plastics into an upper mold body and a lower mold body of the plastic injection mold simultaneously, then the plastic injection mold is pre-pressed through a partition plate and then opened, the upper mold body and the lower mold body are separated, and then the partition plate is drawn out; and step 4, a bonding and cross-linked foaming forming process is carried out, wherein the upper mold body and the lower mold body are closed again, an upper-layer composite material and a lower-layer composite material are subjected to bonding and cross-linked foaming forming in a closed mold cavity, then the plastic injection mold is opened, and the double-color and double-hardness sole is obtained. According to the double-color and double-hardness sole produced through the preparation method, a shoe outsole portion and a shoe middle sole portion are not degummed when meeting water, do not separate from each other and are long in service live, the foaming forming process is fast, and a color bleeding phenomenon cannot happen.
Owner:JINJIANG CHENGCHANG SHOES

Preparation method of flame-retardant magnesium alloy

The invention discloses a preparation method of a flame-retardant magnesium alloy and relates to a magnesium alloy with aluminum as a minor main component. The method comprises the steps of weighing a magnesium ingot, an aluminum ingot, an Mg-Ca master alloy with the calcium content of 20 wt percent and an Mg-Y master alloy with the yttrium content of 25 wt percent as raw materials for feed preparation according to the mass percentage of component elements in the target magnesium alloy, wherein the target magnesium alloy comprises component elements in percentage by weight: 90.7-92.7 percent of Mg, 6.0 percent of Al, 0.3 percent of Mn, 0.5-1.5 percent of Ca and 0.5-1.5 percent of Y, the purity of a magnesium ingot is 99.99 percent, the purity of an aluminum ingot is 99.99 percent, and the purity of a manganese sheet is 99.99 percent; and putting all the raw materials in a gas protection melting furnace, carrying out smelting on the raw materials, then adding a refining agent into the gas protection melting furnace, carrying out refining, pouring the refined raw materials into a cast iron die finally, and carrying out air cooling until room temperature is reached to prepare a flame-retardant magnesium alloy cast ingot of Mg-Al-Mn-Ca-Y. With the adoption of the preparation method, the disadvantages of the flame-retardant magnesium alloy in the prior art that the raw material cost is high, and components contain toxic substances are overcome.
Owner:HEBEI UNIV OF TECH

Spot welding machine welding fume purifying device with environment-friendly function

The invention discloses a spot welding machine welding fume purifying device with an environment-friendly function and relates to the technical field of spot welding machine purifying equipment. The spot welding machine welding fume purifying device comprises a bottom plate; a case is fixedly connected to the top of the bottom plate; a motor is fixedly connected to the bottom of the inner wall of the case through a connecting block; an output shaft of the motor is sleeved with a first bevel gear; and a transmission shaft is rotatably connected to the position, located on one side of the motor, at the bottom of the inner wall of the case through a bearing seat. According to the spot welding machine welding fume purifying device with the environment-friendly function, the environmental protection property of a spot welding machine is greatly improved, welding fume discharged by the spot welding machine is well collected and purified in a centralized mode, the situations that the welding fume is directly discharged into air and pollutes the environment around the spot welding machine are prevented, and the situation that workers suck the large amount of welding fume, and thus the physical health of the workers is greatly damaged is well avoided, so that normal spot welding work of the workers is guaranteed, and using of people for the spot welding machine is quite facilitated.
Owner:湖州同晟管理咨询有限公司

Preparation method of heat-resistant polylactic acid biodegradable material

The invention relates to a method for preparing a polylactic acid biodegradable material by chemical polymerization, which takes lactic acid as a raw material and comprises an esterification dehydration step and a polycondensation step. After the esterification dehydration step is finished and before the polycondensation step is finished, a catalyst, a nucleating agent and a chain extender are added into a reaction kettle, wherein the nucleating agent is a mixed emulsion formed by completely dissolving disodium salicylate solids in a resin emulsion, and the adding quantity of the nucleating agent is 5-25% of the total weight of the heat-resistant polylactic acid; the resin emulsion is an epoxy resin emulsion or a polyurethane resin emulsion or a combination of the epoxy resin emulsion and the polyurethane resin emulsion; and the chain extender is a styrene-acrylic acid copolymer of which the number-average molecular weight is 7500-15000 and the side chain contains 6-7 epoxy groups, and the adding quantity of the chain extender is 0.5-5% of the weight of the heat-resistant polylactic acid. In the method provided by the invention, talcum powder is not used, the production process can be controlled easily, and the prepared polylactic acid biodegradable material has excellent heat resistance and is suitable for industrialized production.
Owner:ZHANGJIAGANG CHAINENG BIOLOGICAL TECH

Glass fiber reinforced plastic pipe and manufacturing method thereof

The invention relates to a glass fiber reinforced plastic pipe and a manufacturing method thereof. Materials of the glass fiber reinforced plastic pipe comprise FW-H-2028 unsaturated polyester resin, HR-192-N unsaturated polyester resin, curing agent, accelerant, flame retardant, roving EDR240-T910, a non-alkali knitting mat MEK380, mesh cloth, a surface mat and a polyester thin film. The manufacturing method comprises weighing the two types of adequate unsaturated polyester resin, pouring the unsaturated polyester resin into different mixing buckets respectively and adding into the flame retardant and pigment paste in proportion; measuring the adequate accelerant and adding into the mixing buckets to be uniformly stirred; weighing a certain amount of curing agent to be mixed with the materials and uniformly stirring; manufacturing a lining in a corresponding mould and then manufacturing a structure layer; hoisting the mould to a curing station through a hoisting device to be heated and cured; hoisting the mould to a mould dismounting machine after the curing and performing demoulding through a mould dismounting ring. The production process of the glass fiber reinforced plastic pipe is simple, the materials are environmentally-friendly, and the damage to the physical health of people cannot be produced.
Owner:SUZHOU MUYI SHIPPING EQUIP

Inhibitor for copper lead sulphide minerals and method for conducting flotation separation with inhibitor

The invention discloses a novel combined inhibitor for copper lead sulphide mineral flotation separation. The inhibitor is formed by mixing a ferric chloride solution with the mass concentration being 1%-3% and a humic acid substance solution with the mass concentration being 8%-10%, and the mass proportion of the ferric chloride (FeCl3) solution and the humic acid substance solution is 1:(6-10). A flotation separation method for copper lead sulphide minerals is provided. The method comprises the following steps that 1, raw ore is subjected to ore grinding; 2, copper and lead mixed flotation is conducted on ground ore; 3, flotation separation is conducted, wherein copper and lead mixed rough concentrate is subjected to reagent removal, the inhibitor composed of the ferric chloride (FeCl3) solution and the humic acid substance solution is added, a collecting agent and a foaming agent are added, and copper concentrate and lead concentrate are obtained through roughing, concentration and scavenging. The inhibitor is applied to copper lead sulphide mineral separation, the copper and lead proportion in the concentrated ore can be lowered, and the grade of the concentrated ore is improved; the advantages that the mineral recovery rate is high, the economical and environmentally friendly properties are achieved, and beneficiation wastewater is easy to process are achieved.
Owner:CENT SOUTH UNIV

Laser cutting machine with automatic positioning function

The invention relates to a laser cutting machine with an automatic positioning function. The laser cutting machine with the automatic positioning function comprises a fixing box, a protective box, a purifying box and a cooling box; the protective box is arranged on the fixing box; a gas distributing disc is arranged at the bottom of a Z-axis telescopic rod, and a laser cutting head is arranged on the gas distributing disc; gas collecting cases are arranged in the protective box, flue gas sucking covers are arranged on the gas collecting cases, and first connection pipes communicate with the gas collecting cases and the purifying box; a first connection case and a second connection case are arranged in the cooling box, and the second connection case is located over the first connection case; a second connection pipe communicates with the purifying box and the first connection case, and a heat-dissipating pipe communicates with the first connection case and the second connection case; a gas return pipe and an exhausting hose are arranged on a gas pump, and the gas return pipe communicates with the second connection case; and gas spraying heads are arranged at the bottom of the gas distributing disc, and the exhausting hose communicates with the gas distributing disc. According to the laser cutting machine with the automatic positioning function, not only can products be effectively fixed, but also flue gas generated in cutting processes can be purified, and product cuts can be cooled, so that functions are diverse, and the laser cutting machine with the automatic positioning function has an excellent use effect.
Owner:张荷友

Technology for processing cold coated reflective glass beads

The invention discloses technology for processing cold coated reflective glass beads, which comprises the steps of: dumping qualified glass beads with the diameter between 0.05 and 1.00mm into a feeding funnel of a drum mixer; preparing a medicament, namely taking a silane coupling agent or mixed methyl silicone oil and sodium silicate or mixed thinner and methyl silicone oil as the medicament; adding the medicament, spraying the medicament and stirring the glass beads, namely loading the medicament into a high-pressure sprayer according to the proportion of adding 400 to 600g of the medicament into each ton of glass beads, arranging a nozzle of the high-pressure sprayer above the inside of the drum mixer, downward directly spraying the medicament to the surfaces of the glass beads to form moistureproof protective films, and stirring the glass beads at the same time, wherein the stirring time is between 8 and 10 minutes; and packaging and performing random inspection, namely using packaging bags lined with plastic inner films for packaging, placing the product for 3 days, then performing random inspection, and sending the product into a warehouse after the product is qualified through random inspection. The technology has the advantages that the technology has high production efficiency, raw material conservation, energy conservation, low production cost, good coating effect and strong adhesive power, has no harm to the health of workers, meets requirement of environmental protection, and can be used for pavement markings and various reflective materials and decorative materials.
Owner:张万春

Wind power blade main beam trimming method

The invention discloses a wind power blade main beam trimming method. The wind power blade main beam trimming method adopts wind power blade main beam automatic trimming equipment for trimming, the equipment comprises a travelling frame, a left cutting and polishing unit and a right cutting and polishing unit are arranged on the travelling frame, the cutting and polishing units are driven by lifting and transverse moving units to lift and transversely move, the cutting and polishing units comprise cutting mechanisms and polishing mechanisms which are arranged front and back, the cutting mechanisms comprise cutting mechanism racks, cutting angle adjusting assemblies and cutting assemblies are arranged in the cutting mechanism racks, the cutting angle adjusting assemblies are used for adjusting the cutting angles of the cutting assemblies during operation, the polishing mechanisms comprise polishing mechanism racks, polishing angle adjusting assemblies and polishing assemblies are arranged in the polishing mechanism racks, and the polishing angle adjusting assemblies are used for adjusting the polishing angles of the polishing assemblies during operation. According to the wind powerblade main beam trimming method, redundant sharp corners and burrs on the side edge of the blade main beam can be automatically cut and polished, and the method is high in machining precision and machining efficiency.
Owner:江阴市科诚技术有限公司

Quantity-controllable type glass surface mirror back paint spraying device

InactiveCN110548632AKeep clean and tidyPreventing Problems That Affect Paint QualityElectrostatic cleaningCleaning using toolsAir filterFixed frame
The invention discloses a quantity-controllable type glass surface mirror back paint spraying device. The quantity-controllable type glass surface mirror back paint spraying device comprises a fixingframe. A conveying belt is installed on one side of the fixing frame. A cleaning box is fixedly installed on the upper surface of the fixing frame, a paint spraying box is fixedly installed on the side, close to the cleaning box, of the upper surface of the fixing frame, and an air drying box is fixedly installed on the side, close to the paint spraying box, of the upper surface of the fixing frame. An air filtering box is arranged on one side of the fixing frame, and a filtering box control panel is installed on the front surface of the air filtering box. According to the quantity-controllable type glass surface mirror back paint spraying device, by means of the cleaning box, the cleaning operation can be conducted before the paint spraying operation of a glass mirror is conducted. In addition, two-stage cleaning is set in the cleaning box, and the remaining dust can be further absorbed by static electricity after the glass mirror is roughly cleaned by a cleaning roller. By means of an infrared sensor and a suspension ring, height information of paint materials in a paint material barrel can be displayed on a displayer, and workers conduct material control for different glass mirrors advantageously.
Owner:TIANJIN CITY XINLIHUA COLOR MATERIAL

A molding process of two-color double-hardness sole

ActiveCN103128978BEliminates manual hand gluing stepsSimple processDomestic articlesCross-linkPlastic injection molding
The invention discloses a forming technology and a preparation method for a double-color and double-hardness sole. The forming technology and the preparation method for the double-color and double-hardness sole mainly includes the following steps: step 1, a mold is prepared, wherein a set of plastic injection mold is prepared; step 2, a plastic injection molding process is prepared, wherein a plastic injection molding machine is provided with two injection gun barrels which can be used for injecting plastics into the plastic injection mold simultaneously; step 3, the plastic injection molding process is carried out, wherein the plastic injection mold is placed on a mold frame of the plastic injection molding machine, the plastic injection molding machine is started, the two injection gun barrels are used for injecting the plastics into an upper mold body and a lower mold body of the plastic injection mold simultaneously, then the plastic injection mold is pre-pressed through a partition plate and then opened, the upper mold body and the lower mold body are separated, and then the partition plate is drawn out; and step 4, a bonding and cross-linked foaming forming process is carried out, wherein the upper mold body and the lower mold body are closed again, an upper-layer composite material and a lower-layer composite material are subjected to bonding and cross-linked foaming forming in a closed mold cavity, then the plastic injection mold is opened, and the double-color and double-hardness sole is obtained. According to the double-color and double-hardness sole produced through the preparation method, a shoe outsole portion and a shoe middle sole portion are not degummed when meeting water, do not separate from each other and are long in service live, the foaming forming process is fast, and a color bleeding phenomenon cannot happen.
Owner:JINJIANG CHENGCHANG SHOES

Dust clearing device convenient to use for computer circuit board

The invention discloses a dust clearing device convenient to use for a computer circuit board, The dust clearing device convenient to use for the computer circuit board comprises a shell, the left side face of the shell is connected with two first sliding sleeves in a clamped mode, the inner surfaces of the two first sliding sleeves both sleeve first sliding rods correspondingly, the left ends ofthe two first sliding rods are fixedly connected with the same pressing plate, the outer surfaces of the first sliding rods are sleeved with first springs, and the two ends of the first springs are fixedly connected with the right side surface of the pressing plate and the left side surfaces of the first sliding sleeves correspondingly. The dust clearing device convenient to use for the computer circuit board is provided, so that two soft brushes can do reciprocating motion left and right on the front side and the back side of the circuit board correspondingly to remove dust on the surface ofthe circuit board, the dust on the surface of the circuit board can be cleared without using hand-held soft brushes by workers, so that the physical strength of the workers is saved; and meanwhile, the harm to the body health of the workers, caused by the fact that the workers inhale the dust into respiratory tracts is avoided as well, and then convenience is brought to the work of the workers.
Owner:SHAANXI ZHONGXING LANTU EDUCATION TECH CO LTD
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