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introduction：In traditional structural foam injection molding，Chemical blowing agents are usually used，Due to its low foaming pressure，The parts produced are limited in wall thickness and shape。The use of supercritical inert gases in microcellular foam injection molding is limited。Microcellular foam injection molding uses supercritical inert gas（CO2、N2）As a physical blowing agent．The process is divided into four steps： 1）Gas dissolution：The supercritical liquid of the inert gas is injected into the polymer melt through a syringe mounted on the structure，Form a homogeneous polymer/Gas system； 2）nucleation：During the filling process the gas drops from polymerization due to pressure
2015-03-30 Reading quantity 2811
introduction：bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Judgment of： Judging whether the bearing is available，The main consideration is the degree of bearing damage、Mechanical property、significance、Operating condition、Until the next inspection period。Can no longer be used if the following defects，New bearings must be replaced。Inner ring、Outer ring、Rolling element、cage
2015-03-30 Reading quantity 1480
introduction：20century80age，The world has made great progress in gear technology。The general trend of product development is miniaturization、High speed、Low noise、High reliability。The most striking development in technology：Hard tooth surface technology Power branch technology and modular design technology。 20century80age，The technology of hard face gear in foreign countries is becoming more and more mature。Hard face gear with high quality alloy steel forgings carburized and hardened，Accuracy not less thanISO1328-1975the6level，The comprehensive bearing capacity of tempered gear with medium hard tooth surface4times，For soft face gear5~6times。The weight of a medium gauge hard face gear reducer
2015-03-30 Reading quantity 2827
introduction： On the water before entering the boiler﹐That is, suspended solids in boiler feed water﹑Colloidal substance﹑Organic matter﹑Various dissolved salts and gases are treated﹐And the water quality in the pot is adjusted﹐The process of bringing the quality of boiler feed water and boiler water up to standard。The purpose of boiler water treatment is to prevent boiler water vapor system from fouling﹑Salt accumulation and corrosion。 Poor boiler feed water quality will cause﹕ Scale the inner wall of the boiler pipe﹔ Steam deterioration﹐Deposits are generated in the superheater and turbine flow sections﹔ Metal corrosion occurs in the inner wall of boiler and water vapor channel。These results directly affect the heat transfer effect of the boiler﹐Reducing pan
2015-03-30 Reading quantity 2783
introduction： 【Main use】 Local host、Auxiliary engine、The electric control box consists of three parts，With wind selection、screenless、netless、Uniform particle size and other properties，The production process is continuous。The machine has reached the international advanced level，Widely used in pharmaceuticals、Chemical engineering、Food and other industrial materials crushing。 【Working principle】 The material enters the crushing chamber from the hopper through the screw conveyor，It is cut and shredded by a high-speed rotating blade，The material is transported into the cyclone by the method of negative pressure air transport，Bag type dust collector、Discharge material to meet product requirements。 【Technical parameter】
2015-03-30 Reading quantity 2785
introduction： Standard number Standard Chinese name Standard English name BS 1655-1950 Flanged automatic control valves for process control industry(Surface to surface dimensions)norm (Specification for flanged automatic cont
2015-03-30 Reading quantity 2870
introduction：1、Follow the general operating procedures for casting equipment。 2、Check that all seals and plugs are in good condition，If damaged，Due for replacement。 3、Each valve handle is operated one by one for test run，Check whether air leakage occurs in the pipeline system，Just make sure everythings okay，Before production can proceed。 4、In the process of lifting the cylinder block，Non-collision equipment，Pay attention to personal safety。 5、After work，The cylinder block needs to be lifted away from the equipment，Do not park on the test bench。
2015-03-30 Reading quantity 2773
introduction： The furnace type should be determined according to different process requirements and the type of workpiece 1．For those that cannot be produced in batches，Workpieces of unequal size，More varied，It is required to have commonality in the process、 versatile，Box type furnace is available。 2．Heat long shafts and long lead screws，The pipe is waiting for the workpiece，Deep-well electric furnace is available。 3．Small batch carburized parts，Well type gas carburizing furnace is available。 4．For large quantities of cars、The production of tractor gear and other parts can be selected continuous carburizing production line or box-type multi-purpose furnace。 5．The addition of sheet blanks for stamping parts
2015-03-30 Reading quantity 1537
introduction：The performance of the tool is to affect the cutting efficiency、precision、Surface quality is one of the decisive factors。In the process of modern processing，The most effective way to improve the machining efficiency is to use high-speed cutting technology；With the development of modern science and technology and production，Increasingly, superhard and difficult-to-process materials are used，To improve the service life and working performance of the machine equipment。Ceramic cutters are characterized by their excellent heat resistance、Wear resistance and chemical stability，In the field of high-speed cutting and difficult to process materials, it shows the advantages that traditional tools cannot match。The new ceramic tool is also due to its high hardness(HRA93—95)，Thus machinable
2015-03-30 Reading quantity 2834
introduction：one、Function of date： Jujube is an ancient traditional fruit in China，Rich nutritional value，The crown of a hundred fruits。Beneficial to human body，Its a tonic。High practicability，Have a sweet taste，Red dates are Natures best anti-aging fruit，China has the habit of eating jujube。Sweet date flavor，Warm in nature，Enter the spleen and stomach channels，Nourishing qi and blood，jujube36Species trace element，Adjustable generation Richard，sedative，Treatment of coronary heart disease，Inhibit cancer cells，Protect the liver，Build muscle strength，Anti-lipid peroxidation，Remove phlegm to relieve cough，Build up ones health。Jujube products are very popular in recent years Good harvest、Production surge。Dates must be carefully processed。Dates are wealth，Use the dates well！
2015-03-30 Reading quantity 2912
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