53results about How to "Improve extrusion strength" patented technology

The invention relates to a preparation method of a leakage blocking auxiliary agent in the field of oil field well drilling. The method comprises the following steps of (1) firstly weighing a certainamount of acrylamide, 2-acrylamide-2-methallyl sulfonate, N,N-methylene bisacrylamide and initiators; putting the materials into a reactor; adding the corresponding amount of distilled water and ice water bath; performing stirring to complete dissolution; (2) slowly adding enhancing agents and hydrophobic monomers; performing low-temperature stirring; introducing N2 for protection; (3) lowering the temperature to 0 to 10 DEG C; dripping an initiator solution; (4) after the dripping completion, continuously performing stirring for 15min; raising the temperature to 50 DEG C; performing still state reaction for 2 to 5h to obtain an elastic gel body; (5) taking out the elastic gel body; performing vacuum drying at 60 to 90 DEG C and shearing to obtain a delay water absorption expansion leakageblocking agent product. The method has the advantages that the obvious delay expansion features are realized; the expansion in a shaft is slow; after reaching the leakage zone, the expansion can be continuously performed, so that the leakage zone can be effectively improved; the restoration effect is achieved.

The invention relates to a manufacturing method of diatomite porous brick. The weight percentages of raw materials of the brick are as follows: diatomite 55-75 percent, fly ash 20-30 percent and wood dust 5-15 percent. The manufacturing method comprises the steps of compounding, melting, extrusion molding, brick blank drying, brick blank calcination, and final production inspection and preservation. The inventive brick utilizes diatomite as main ingredient and fly ash and wood dust as adjuvant, has a plurality of uniformly-distributed round or square hole on the front surface, and has hollow structure instead of solid structure of the prior wall brick. Therefore, the inventive brick has the advantages of higher strength, good fire-proof and heat-insulating effects, less waste of diatomite resource and low cost. The diatomite porous heat-insulating brick is, so far, the better light-weight wall material with effects of both heat insulation and heat preservation.

The invention relates to the field of daily use household articles, in particular to a juicer. The juicer comprises a rocker, a screw rod, a first filter screen, a squeezing cavity, a cavity cover and a supporting seat. One end of the screw rod is fixedly connected with the rocker, a cylinder is arranged at the other end of the screw rod, the screw rod is fixedly arranged on the cavity cover through the cylinder, the outer diameter of the screw rod is enlarged gradually, the screw rod is provided with zigzag helical blades, the spaces among the zigzag helical blades are reduced gradually, the cylinder penetrates through the first filter screen, a first ball bearing is arranged at the front end of the squeezing cavity, the cavity cover is provided with a second ball bearing, the screw rod is arranged on the first ball bearing and the second ball bearing in a sleeved mode, and the supporting seat is fixedly arranged at the bottom end of the squeezing cavity. According to the juicer, the screw rod is driven by a handle to carry out squeezing and juicing, and the juicer has the advantages of reducing producing cost, reducing noise, and improving safety factors.

The invention discloses a set-off shell material for fireworks and crackers, which is prepared from the following raw materials in portion by weight: 1 to 2.5 portions of starch, 1.5 to 3 portions of vegetable fiber, 4.5 to 8 portions of clay, 0.09 to 1.0 portion of activating agent, and 0.1 to 0.9 portion of stabilizing agent. The shell material takes the clay as a base material and the starch and the vegetable fiber as auxiliary materials and can be biodegraded in the natural environment, which is advantageous for environmental protection, and the prepared shells of the fireworks and the crackers have high strength, are high-temperature resistant, reduce the possibility of undershooting during the of setting off, and reach the standard of 'method for compression and stacking tests by a compression testing machine' of GB/T4857.4-2008. The fireworks and the crackers made from the set-off shell material prepared by the method have high strength, strong set-off performance and high safety performance, and reach the standards of GB10631-2004, GB19593-2004 and GB19594-2004.

The invention discloses an LCD panel manufacturing method, comprising the following steps: providing an LCD box which comprises a first base plate and a second base plate; sticking a chip on the first base plate; and attaching a polaroid in the LCD box. The invention can greatly promote anti-compressive strength without influencing capacity and yield.

The invention discloses a belt conveying system for transportation of bulk materials, and belongs to the field of conveyers. The belt conveying system comprises a rack, and a driving head wheel and a driving tail wheel are arranged at the two ends of the rack respectively; a conveyer belt coats the driving head wheel and the driving tail wheel and conveys the materials around the driving head wheel and the driving tail wheel; the upper layer conveyer belt is supported by top carrier rollers; the lower layer conveyer belt is supported by bottom carrier rollers; the top carrier rollers comprise fixed carrier rollers and movable carrier rollers; a sweeper is arranged above the lower layer conveyer belt; the materials conveyed by the conveyer belt are collected by a material mover; and a primary material arranging device and a secondary material arranging device are sequentially arranged in the transportation direction of the material mover. According to the belt conveying system, flying dust can be decreased, the production environment is improved, material transportation efficiency is improved, and efficient and stable operation of the conveyers is guaranteed.

A rod forming machine at least comprises a frame. At least one horizontal extrusion forming barrel is mounted on the frame, a hydraulic oil cylinder with piston rods is mounted on one sides of feed inlets of the barrels. The piston rods are connected with extrusion blocks through connected extrusion rods, and the extrusion blocks with the section same with the cross section of an extrusion cavity in each barrel are in movable fit with the extrusion cavities. Discharge outlets communicated with the extrusion cavities of the barrels are arranged on the inner sides of the feed inlets of the barrels. The discharge outlets are provided with feed hoppers and form a rod extrusion and forming device. The extrusion forming barrels are square columnar barrels. The rod forming machine has the advantages of reasonable structure, and convenience and reliability in use and the advantages that extrusion intensity can be increased, service life is prolonged, using cost is reduced, using efficiency and effect are improved and the like.

The invention discloses a screw extruder for plant straw dehydration. The screw extruder comprises a rack, a spiral main shaft, a driving device, a screen barrel, a seal cover, a feeding opening and a discharging opening. The spiral main shaft comprises a feeding straight shaft section, a conveying section and a discharging straight shaft section, wherein the feeding straight shaft section is located below the feeding opening and used for being adapted to the situation when the feeding amount is high in fluctuation; the conveying section is connected with the tail end of the feeding straight shaft section and used for extruding conveyed materials; and the discharging straight shaft section is connected with the tail end of the conveying section and used for forming continuous material stuffing so that dryness of discharged materials can be improved, and part of the discharging straight shaft section is located above the discharging opening. Spiral vanes on the feeding straight shaft section and spiral vanes on the conveying section are unchanged in screw pitch. A backpressure disc structure provided with a backpressure disc is arranged at the discharging opening. The screw extruder is applicable to the pretreatment process for comprehensively utilizing plant straw for producing biomass fuel and suitable for the feeding mode large in fluctuation quantity; dryness of the extruded straw materials reaches 40-55%; and the screw extruder is stable in operation, free of blocking and low in power consumption.

The two-stage vacuum brick and tile extruding machine has two motors to drive through axial pneumatic clutches two reducers, including one transverse reducer to drive the stirring barrel for stirring and extruding and one longitudinal reducer to drive the forming extruder, one large two-stage vacuum machine with two crossly arranged stages, one stirring member and one spiral cast with 16Mn material. The two-stage vacuum brick and tile extruding machine has high work efficiency, stable product quality, long service life and high extrusion strength, and the extruded products may be used for various bearing and non-bearing walls.

The invention relates to a novel method for preparing a large-thickness polyester reinforced acrylic ester plate with uniformly distributed polyester silk, and particularly relates to a method for preparing polyester sheets by infiltration polymerization of single-layer polyester silk and enabling the polyester sheets to be subjected to secondary polymerization after being laminated to form the polyester reinforced acrylic ester plate with large thickness and the uniformly-distributed polyester silk inside the polyester sheets. The method is a novel preparation method of composite materials. According to the method, 655 type polyester silk and MMA are adopted, the polyester sheets are polymerized by using a composite initiator, and the polyester sheets are cut and laminated and are fixed in a specially-made model, MMA slurry with certain viscosity is injected, and the secondary polymerization is carried out. The mass ratio of the polyester silk to methyl methacrylate is 70 (+/-10): 100. The polyester-reinforced acrylic ester plates with the thickness up to 50 mm and uniformly distributed in the inner structure of the plates are prepared.

The invention relates to a molding machine and particularly relates to a molding machine for producing high-strength wood particles. The molding machine for producing the high-strength wood particles comprises a compaction wheel assembly, a mold assembly, a conversion connector and a movable cutting assembly, wherein the compaction wheel assembly comprises a compaction wheel shaft, a compaction wheel and a bracket; the mold assembly comprises a main shaft and an annular mold; the annular mold is provided with a mold cavity; a plurality of extruding holes are formed in an annular surface; the movable cutting assembly comprises a screw rod arranged on the bracket, a movable nut which sleeves the screw rod, a slide rail arranged on the main shaft, a slide seat arranged on the slide rail and a cutting tool; one end of the cutting tool is fixed on the movable nut and the other end of the cutting tool is fixed on the slide seat; and each extruding hole comprises a material storage part and a molding part connected onto the material storage part. With the adoption of the molding machine, the length of the particles is consistent; the strength of the extruded particles is improved, the granulation effect is improved and the stress on the mold is relatively uniform; and the molding machine is simple in structure and convenient to operate and the service life of the equipment is prolonged.

The invention provides an extrusion gelatinization device and a system. The device comprises a heating cavity, an extrusion cavity and a screw rod. The heating cavity is provided with a steam inlet and a steam outlet. The extrusion cavity is located in the heating cavity, and provided with a feeding port and a discharging port which extend out of the heating cavity. The screw rod is of a hollow structure, can rotate in the circumferential direction and comprises a driving section and a working section. The working section is located in the extrusion cavity and used for fitting with the cavity wall of the extrusion cavity when rotating the screw rod so that materials can be extruded and gelatinized while being conveyed from the feeding port to the discharging port. The driving section extends out of the extrusion cavity, and is provided with an opening on the end for communicating with an external steam source and connecting with an external rotary driving mechanism. A through hole for overflowing steam into the extrusion cavity is arranged on the working section. Therefore, materials in the extrusion cavity can be heated at extremely high heating rate with extremely high heating uniformity under the action of the double-layer steam, thereby ensuring gelatinization of the materials under high productivity.

The invention relates to a novel method for preparing an uniformly distributed large-thickness polyester reinforced acrylic ester plate. The method is a method for preparing the large-thickness uniformly distributed acrylic ester plate through polymerization by infiltrating a methyl methacrylate solution on the polyester silk, is a method for making the polyester silk and the methyl methacrylate solution to be uniformly and stably polymerized to the large-thickness uniformly distributed acrylic ester plate by performing constant-speed turnover polymerization through a 360-degree turnover machine, and is a novel preparation method for the composite material. The acrylic ester plate is formed through casting polymerizing of 655-type polyester silk and methyl methacrylate, and the mass ratioof the polyester silk to the methyl methacrylate is 90(+/-10):100 (mass ratio); and according to the method, the polyester reinforced acrylic ester plate with the thickness capable of reaching up to 50 mm and the polyester silk capable of being uniformly distributed in the inner structure of the plate can be prepared.

The invention discloses a brake brake shoe for a brake device. The brake brake shoe comprises a brake shoe base body and a covering layer, the covering layer serves as a friction body and is arranged on the braking force acting face of the brake shoe base body, at least two transverse V-shaped grooves and at least two longitudinal V-shaped grooves are formed in the braking force acting face of the brake block base body in a machined mode, and the transverse V-shaped grooves and the longitudinal V-shaped grooves are formed in a mutually crossed mode, so that a conical protrusion is formed on the braking force acting face of the brake block base body, and the covering layer is directly cast on the conical protrusion of the brake block base body in a casting mode, so that the brake block base body and the covering layer are cast into an integrated structure. According to the brake brake shoe for the brake device, on the basis that the abrasion performance of the bake brake block is effectively improved and the service life of the brake brake block is effectively prolonged, the reliability of the braking performance of the brake is improved, the structure is more compact, machining and manufacturing are easy and convenient, and replacement or disassembly and assembly are more convenient and faster.

The invention discloses sludge conveying and dewatering equipment used for sludge treatment. The equipment comprises a material conveying cylinder used for conveying sludge, a plurality of supportinglegs used for supporting the material conveying cylinder and a collecting box used for collecting the treated sludge; and the material conveying cylinder is provided with a material inlet hopper and aspiral material supply rod, at least one dewatering box used for dewatering treatment of the sludge and first driving member used for driving rotation of the dewatering box are arranged below the material conveying cylinder, the first driving member is fixedly arranged on the collecting box, and the dewatering box is provided with a dewatering device. According to the equipment provided by the invention, through arrangement of the above structure, the sludge can be uniformly conveyed through the material conveying cylinder, so that volume treatment of the sludge is realized, and blockage caused by a too large volume of the sludge is avoided; and at the same time, the sludge can be treated by the dewatering device, so that the sludge can be dried in a certain shape in batches, forming specifications of the sludge are substantially same, mutual adhesion of the sludge can be avoided, collection arrangement of the sludge is facilitated, and the control utilization rate of the collection container is improved.

The invention discloses a rubber sealing device for a pressure increasing valve of an automobile brake device. The rubber sealing device comprises an outer side sealing ring body, an inner side adjusting ring body, a bottom connecting ring body and a rotary adjusting mechanism. For the rubber sealing device disclosed by the invention, a whole sealing main body is composed of the outer side sealingring body, the inner side adjusting ring body and the bottom connecting ring body, and the bottom connecting ring body is connected to the lower end between the outer side sealing ring body and the inner side adjusting ring body, so that the outer side sealing ring body, the inner side adjusting ring body and the bottom connecting ring body can define an adjusting annular groove; the adjusting annular groove enables radial extrusion strengths of the outer side sealing ring body and the inner side adjusting ring body to get an adjusting space; and an adjusting threaded column drives an abutting head to extrude the inner side adjusting ring body by rotating the adjusting threaded column, so that the outward extrusion strengths of the outer side sealing ring body and the inner side adjustingring body are improved, and then the sealing effect is greatly improved.