英语翻译One of the basic problems in the development and production process of moulds for injection moulding is the control of temperature con-ditions in the mould.Precise study of thermodynamic processes in moulds showed,that heat exchange can b

来源：学生作业帮助网编辑：作业帮时间：2024/04/29 18:10:55

英语翻译One of the basic problems in the development and production process of moulds for injection moulding is the control of temperature con-ditions in the mould.Precise study of thermodynamic processes in moulds showed,that heat exchange can b
英语翻译
One of the basic problems in the development and production process of moulds for injection moulding is the control of temperature con-
ditions in the mould.Precise study of thermodynamic processes in moulds showed,that heat exchange can be manipulated by thermoelectrical
means.Such system upgrades conventional cooling systems within the mould or can be a stand alone application for heat manipulation within
it.
In the paper,the authors will present results of the research project,which was carried out in three phases and its results are patented in A686\2006
patent.The testing stage,the prototype stage and the industrialization phase will be presented.The main results of the project were total and rapid
on-line thermoregulation of the mould over the cycle time and overall inﬂuence on quality of plastic product with emphasis on deformation
control.
Presented application can present a milestone in the ﬁeld of mould temperature and product quality control during the injection moulding process.
© 2006 Elsevier B.V.All rights reserved.
Keywords:Injection moulding; Mould cooling; Thermoelectric modules; FEM simulations
1.Introduction,deﬁnition of problem
Development of technology of cooling moulds via thermo-
electrical (TEM) means derives out of the industrial praxis and
problems,i.e.at design,tool making and exploitation of tools.
Current cooling technologies have technological limitations.
Their limitations can be located and predicted in advance with
ﬁnite element analyses (FEA) simulation packages but not com-
pletely avoided.Results of a diverse state of the art analyses
revealed that all existing cooling systems do not provide con-
trollable heat transfer capabilities adequate to ﬁt into demand-
ing technological windows of current polymer processing
technologies.
Polymer processing is nowadays limited (in term of short-
ening the production cycle time and within that reducing costs)
only with heat capacity manipulation capabilities.Other produc-
tion optimization capabilities are already driven to mechanical
and polymer processing limitations [3].
1.1.Thermal processes in injection moulding plastic
processing
Plastic processing is based on heat transfer between plastic
material and mould cavity.Within calculation of heat transfer
one should consider two major facts:ﬁrst is all used energy
which is based on ﬁrst law of thermodynamics—law of energy
conservation [1],second is velocity of heat transfer.Basic task
at heat transfer analyses is temperature calculation over time
and its distribution inside studied system.That last depends on
velocity of heat transfer between the system and surroundings
and velocity of heat transfer inside the system.Heat transfer can
be based as heat conduction,convection and radiation [1].
With the application of TEM module,it is possible to signif-
icantly reduce the cycle time in the injection moulding process.
The limits of possible time reduction lies in the frame of 10–25%
of additional cooling time,describe in Section 1.2.
With the application of TEM module it is possible to actively
control the warping of the product and to regulate the amount
of product warpage in the way to achieve required product tol-
erances.
The presented TEM module cooling application for injection
moulding process is a matter of priority note for the patent,held
and owned by TECOS.

英语翻译As a Nedstat Basic User you are a member of one of the biggest webmaster communities in the world. 英语翻译The basic element of a cogeneration plant comprises one or more prime movers usually driving electrical generators. 英语翻译one of the world's richest men has taken a close interst in one of man's most basic funcions 英语翻译I want you to consider whether you think we are fulfilling one of my basic goals,which is providing simplicity to the left 英语翻译One of the basic problems in the development and production process of moulds for injection moulding is the control of temperature con-ditions in the mould.Precise study of thermodynamic processes in moulds showed,that heat exchange can b 11 .The basic features of the communication process are identified in one question:Who says _____ 英语翻译GIA DESIGNGnutella-like systems have one basic problem:when faced with a high aggregate query rate,nodes quickly become overloaded and the system ceases to function satisfactorily.Moreover,this problem gets worse as the size of the system 英语翻译Subject to the terms and conditions of the Employment Contract,the employment offered herein is terminable at anytime before its acceptance without prior notice;or at three days notice during probation or one months Basic Salary in lieu t 英语翻译According to literature,one of the basic issues for an appropriate ISM is the so-called “Closed Loop Principle”[Bemelmans,2000].That principle is based on the following:developing,using and maintaining IS will only be successful in ca 英语翻译everyone is told of the importance in basic education as well as experience. 英语翻译PDMAEMA71-b-PAA59 diblock polyampholyte was afforded by one-pot ATRP and the followed acidic hydrolysis.The critical micellization temperature (CMT) of this polyampholyte in basic medium (pH = 11) was determined as 37.5 ºC by turbidi 英语翻译The system interface is shown in Figure 4.It shows thepoints and lines of the basic size pattern and a size patternthat is one step larger.The system’s process works in the following manner:1.A basic size pattern,and a size pattern that basic situation of the country是什么意思英语翻译1、Firstly put one inverse card on the topmost of cards.2、Ask audience to take one card out,then put this inverse one on the upward of cards.3、After many times riffling cards,according to Basic method(1),pull cards out bccause the tw 英语翻译The J-K Flip-Flop.Another problem with the basic R-S flip-flop is the forbidden state at the input.This can be eliminated by ANDing the inputs with the output of the flip-flop,thus blocking one of the inputs,as shown in Fig.4.23.The added 英语翻译To the basic requirement of armed forces and to the demands of the news security scene we must add the complications of the Soviet factor. 英语翻译The structure of granules or agglomerates is defined as the spatialarrangement of its basic components [18].The basic components areprimary particles,binder or liquid components and intra particleporosity.The quantification of granule str 翻译:It must be pointed out that it is one of our basic state policies to control population growth while raising the quality of the population