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introduction： The design of injection mold cooling systems is often considered a minor issue。Not enough attention has been paid to the size and structural design of the cooling system。Cooling system design is not reasonable，For small plastic parts can produce internal stress，Large plastic parts with thin walls can cause deformation，Even stress cracking。moreover，undercooling，Can lead to prolonged molding cycle，This reduces productivity。below，In some simplified form，The complicated cooling process of injection mold was studied，A practical formula is derived，The method of determining the size of cooling system is discussed according to these formulas。 Determined cooling
2015-06-11 Reading quantity 2878
introduction：lubricant The function of the lubricant is to reduce the friction resistance、Reduce wear、Cooling and vibration absorption，Lubricants come in liquid form、Solid and gaseous and semi-solid，Liquid lubricants are called lubricating oils，semisolid、It is grease in the form of oil paste at normal temperature。 Lubricating oil Lubricating oil is the main lubricant，The main physical properties of lubricating oil are viscosity，Viscosity characterizes the internal frictional properties of liquid flow，Greater viscosity，The less liquid it is。Another physical property of lubricating oil is oiliness，Characterizes the adsorption capacity of lubricating oil on metal surfaces。oily，The stronger the ability to adsorb metals，youjiangyu
2015-06-10 Reading quantity 1646
introduction：We all know imported bearings[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]Many will fail,Many use imported bearings[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]The user has such a situation,So why is that,Imported bearing[Into the
2015-06-10 Reading quantity 1640
introduction： The capping operation is done at the next workbench。LeeContainerThe company is63mmBottles are provided with corresponding LIDS，Of course these LIDS are actually made ofRiekecorporation（Indiana, USAAuburnThe city）Produced by injection moldingPPcover。The lid is put into a reservoir，The lid is then transferred by an inclined conveyor belt to a classifier，The latter places the lid in a certain direction，So when the lid goes down a slope，It would be in the right state to be spun in front of the bottle。
2015-06-10 Reading quantity 2845
introduction：The purpose of packaging is to protect the product，So that it is not damaged during storage and transportation。Packaging sometimes also plays the role of decorating products，To boost sales。 Categories are classified according to packaging objects，There are two types of parts packaging and machine packaging。Parts are packaged to protect product accuracy，Easy to assemble and install on site。According to the form of packaging, there are inner packaging and outer packaging。Products with simple structure can be packaged at once，There are also parts that only need partial protection。Packaging should meet the requirements of different use objects，Such as meeting the needs of end consumers or cooperative factories；Immediate sales or inventory needs
2015-06-10 Reading quantity 2870
introduction：Qian Changzuo Qian Changzuo (1901～ ) Chinese modern aeronautical engineer。1901years8month7He was born in Changshu County, Jiangsu Province。1919He was recommended to study in the United States by Tsinghua University，1922After graduating from the Mechanical Engineering Department of the Massachusetts Institute of Technology, he entered the Aeronautical Engineering graduate program，1924He received a masters degree。The same year after returning to Zhejiang industrial school、Tsinghua University。1928He began to work in aviation，He was the director of the Central Aviation School under the Kuomintang government、Principal of aeronautical Machinery School、Deputy Director, Technical Office, Committee on Aviation、Nanchuan Second
2015-06-10 Reading quantity 2888
introduction： Ring breakage is a problemFAGSelf-aligning roller bearings[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。]One of the quality problems，The defect fracture is the main form of ring fracture，The main reason is the raw material itself or improper production operation，The device cannot run properly。
2015-06-10 Reading quantity 1628
introduction：one Carbon tool steel(Non-alloy tool steel (one)definition In accordance withGB/T13304《Steel classification》The first1section“Steel is classified by chemical composition”，Carbon tool negative belongs to unalloyed steel。According to the supposed standard2section“Steel is classified according to the main quality grade and the main performance and service characteristics”，Carbon tool steel is a special quality non-alloy steel。 Carbon tool steel(Non-bonded tool steel)Its high carbon hypereutectoid、Eutectoid or hypoeutectoid steel，Carbon content range is0.7%~1.3%(Mass fraction)。Its properties are in addition to smelting、Thermoplastic deformation process related outside，It depends on the carbon content。Carbon is a carbon worker
2015-06-10 Reading quantity 2958
introduction：one、Product features and selection points： ● Vacuum furnace according to the structure can be divided into vertical and horizontal two series，The vertical series is divided into two types: bell lift type and bottom tray lift type。Horizontal series is divided into single door structure and front and back double door structure。The furnace body adopts water-cooled sandwich wall structure。 ● Two kinds of heating greenhouse are available: all-metal type and composite type，The all-metal type is composed of heat-resistant stainless steel and molybdenum screen；Composite made of heat-resistant stainless steel、Molybdenum screen and carbon felt、Composed of mullite fiber or silicate fiber。The specific choice depends on the users process conditions and requirements for the process environment。 ●
2015-06-10 Reading quantity 2892
introduction：TIMKENbearing[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。]Greases are usually expressed in terms of apparent viscosity or similar viscosity，When describing the viscosity of grease，Temperature and shear rate must be specified。A similar viscosity index can be used to control its low temperature flow and pumpability。 It is an important index to measure the low temperature performance of aligning ball bearing grease
2015-06-10 Reading quantity 1597
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